CN112710100B - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN112710100B CN112710100B CN201911022112.6A CN201911022112A CN112710100B CN 112710100 B CN112710100 B CN 112710100B CN 201911022112 A CN201911022112 A CN 201911022112A CN 112710100 B CN112710100 B CN 112710100B
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- heat exchanger
- indoor unit
- adjusting
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000006835 compression Effects 0.000 claims abstract description 76
- 238000007906 compression Methods 0.000 claims abstract description 76
- 230000007246 mechanism Effects 0.000 claims abstract description 74
- 239000003507 refrigerant Substances 0.000 claims description 157
- 238000007791 dehumidification Methods 0.000 claims description 137
- 238000010438 heat treatment Methods 0.000 claims description 134
- 238000003303 reheating Methods 0.000 claims description 114
- 238000001816 cooling Methods 0.000 claims description 92
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- 238000005057 refrigeration Methods 0.000 claims description 30
- 238000010257 thawing Methods 0.000 claims description 19
- 239000008236 heating water Substances 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 24
- 230000008569 process Effects 0.000 description 10
- 238000001704 evaporation Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0083—Indoor units, e.g. fan coil units with dehumidification means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner and a control method thereof, wherein the air conditioner comprises an outdoor unit and an indoor unit, the outdoor unit comprises a compression mechanism, an outdoor heat exchanger and an outdoor throttling regulator, and the indoor unit comprises a dehumidifying heat exchanger, a dehumidifying throttling regulator and a first control valve; the air conditioner further includes: a discharge pipe, a low pressure suction pipe, a first piping sequentially connected with the discharge pipe, the outdoor heat exchanger, the outdoor throttle adjusting device, the dehumidifying throttle adjusting device and the dehumidifying heat exchanger, and a second piping sequentially connected with the dehumidifying heat exchanger, the first control valve and the low pressure suction pipe, thereby forming a dehumidifying loop; the air conditioner further includes a third pipe and a first branch pipe branching from the discharge pipe, the third pipe connecting the first intersection of the first pipe, the reheat throttle adjusting device, the reheat heat exchanger, the second control valve, and the first branch pipe in this order, thereby forming a reheat circuit. The technical scheme of the invention is beneficial to improving the adaptability of the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a control method thereof.
Background
Along with the improvement of the living standard of people, the requirements of people on the air conditioner are also higher and higher. Due to the complexity of weather, people sometimes need cold to cool, sometimes need heat to warm, and sometimes need dehumidification under the condition of little temperature change. However, the conventional air conditioner has a single function, and it is difficult to satisfy the needs of people.
Disclosure of Invention
The invention mainly aims to provide an air conditioner, which aims to improve the applicability of the air conditioner so as to meet the demands of users.
In order to achieve the above object, the present invention provides an air conditioner comprising an outdoor unit and an indoor unit, wherein the outdoor unit comprises a compression mechanism, an outdoor heat exchanger and an outdoor throttle adjusting device, and the indoor unit comprises a dehumidifying heat exchanger, a dehumidifying throttle adjusting device and a first control valve;
The air conditioner further includes: a discharge pipe connected to a discharge side of the compression mechanism, a low pressure suction pipe connected to a low pressure suction side of the compression mechanism, a first pipe sequentially connected to the discharge pipe, the outdoor heat exchanger, the outdoor throttle control device, the dehumidification heat exchanger, and a second pipe sequentially connected to the dehumidification heat exchanger, the first control valve, and the low pressure suction pipe, thereby forming a dehumidification circuit;
The indoor unit further comprises a reheating heat exchanger, a reheating throttling adjusting device, a second control valve and a thermal circulation device for feeding heat or cold of the indoor unit into a room;
The air conditioner further includes a third pipe and a first branch pipe branching from the discharge pipe, the third pipe connecting in order a first intersection of the first pipe, the reheat throttle adjusting device, the reheat heat exchanger, the second control valve, and the first branch pipe to constitute a reheat circuit, wherein the first intersection is located between the dehumidification throttle adjusting device and the outdoor throttle adjusting device.
Optionally, the indoor unit further includes a third control valve and a second bifurcation pipe, where the second bifurcation pipe connects in sequence a second intersection of the second piping, the third control valve, and a third intersection of the third piping, where the second intersection is located between the dehumidification heat exchanger and the first control valve, and the third intersection is located between the reheat heat exchanger and the second control valve.
Optionally, the indoor unit further includes a fourth control valve and a third branch pipe branching from the second pipe, the third branch pipe connecting a third intersection of the fourth control valve and the third pipe.
Optionally, the outdoor unit further comprises a reversing device having a first switching state and a second switching state,
In the first switching state, the reversing device communicates the discharge pipe with the first pipe and communicates the low-pressure suction pipe with the second pipe;
In the second switching state, the reversing device communicates the discharge pipe with the second pipe, and communicates the low-pressure suction pipe with the first pipe.
Optionally, the dehumidification throttle adjustment device comprises a dehumidification throttle valve, and the reheat throttle adjustment device comprises a reheat throttle valve.
Optionally, the first control valve and the second control valve are solenoid valves or electric valves.
Optionally, the thermal cycle device is an air supply device, and the dehumidifying heat exchanger and the reheating heat exchanger are disposed in an airflow circulation path formed by the air supply device.
Optionally, the air conditioner further includes a first connection pipe branched from a fourth crossing point of the first pipe, a second connection pipe branched from the second pipe, and a third connection pipe branched from the third pipe, the fourth crossing point being located between the dehumidification throttle adjustment device and the outdoor heat exchanger;
the air conditioner further comprises a plurality of indoor units, and the indoor units are connected to the first connecting pipe, the second connecting pipe and the third connecting pipe in parallel.
Optionally, the air conditioner further comprises a heat exchange water tank and a floor heating water flow pipe communicated with the heat exchange water tank;
The heat exchange water tank is internally provided with a floor heating heat exchanger, a refrigerant inlet of the floor heating heat exchanger is communicated with a third pipe, a refrigerant outlet of the floor heating heat exchanger is communicated with a first pipe, and a fifth control valve is arranged on the second pipe.
Optionally, the indoor unit further comprises electric auxiliary heat, and the electric auxiliary heat is located between the dehumidification heat exchanger and the reheating heat exchanger;
Or the electric auxiliary heat is positioned at one side of the dehumidification heat exchanger far away from the reheating heat exchanger;
or the electric auxiliary heat is positioned at one side of the reheating heat exchanger far away from the dehumidifying heat exchanger.
The invention also provides a control method of the air conditioner, the air conditioner comprises an outdoor unit and an indoor unit, the outdoor unit comprises a compression mechanism, an outdoor heat exchanger and an outdoor throttling regulator, and the indoor unit comprises a dehumidifying heat exchanger, a dehumidifying throttling regulator and a first control valve;
The air conditioner further includes: a discharge pipe connected to a discharge side of the compression mechanism, a low pressure suction pipe connected to a low pressure suction side of the compression mechanism, a first pipe sequentially connected to the discharge pipe, the outdoor heat exchanger, the outdoor throttle control device, the dehumidification heat exchanger, and a second pipe sequentially connected to the dehumidification heat exchanger, the first control valve, and the low pressure suction pipe, thereby forming a dehumidification circuit;
The indoor unit further comprises a reheating heat exchanger, a reheating throttling adjusting device, a second control valve and a thermal circulation device for feeding heat or cold of the indoor unit into a room;
The air conditioner further includes a third pipe and a first branch pipe branching from the discharge pipe, the third pipe connecting a first intersection of the first pipe, the reheat throttle adjusting device, the reheat heat exchanger, the second control valve, and the first branch pipe in this order to constitute a reheat circuit, wherein the first intersection is located between the dehumidification throttle adjusting device and the outdoor throttle adjusting device;
the control method of the air conditioner comprises the following steps:
Acquiring a mode instruction;
and adjusting the working states of the first control valve and the second control valve according to the mode command.
Optionally, the indoor unit further includes a third control valve and a second bifurcation, where the second bifurcation connects a second intersection of the second piping, the third control valve, and a third intersection of the third piping in sequence, where the second intersection is located between the dehumidification heat exchanger and the first control valve, and the third intersection is located between the reheat heat exchanger and the second control valve;
after the step of fetching the mode instruction, further comprising:
And adjusting the working state of the third control valve according to the mode command.
Optionally, the mode command includes a refrigeration mode command, and the step of adjusting the working states of the first control valve, the second control valve and the third control valve according to the mode command includes:
and opening the first control valve, closing the second control valve and opening the third control valve according to the refrigerating mode command.
Optionally, the mode command includes a dehumidifying and reheating mode command, and the step of adjusting the working states of the first control valve, the second control valve and the third control valve according to the mode command includes:
And opening the first control valve, opening the second control valve and closing the third control valve according to the dehumidification reheating mode command.
Optionally, the outdoor unit further comprises a reversing device having a first switching state and a second switching state,
In the first switching state, the reversing device communicates the discharge pipe with the first pipe and communicates the low-pressure suction pipe with the second pipe;
In the second switching state, the reversing device communicates the discharge pipe with the second pipe, and communicates the low-pressure suction pipe with the first pipe;
after the step of fetching the mode instruction, further comprising:
And adjusting the working state of the reversing device according to the mode instruction.
Optionally, the indoor unit further includes a third control valve and a second bifurcation, where the second bifurcation connects a second intersection of the second piping, the third control valve, and a third intersection of the third piping in sequence, where the second intersection is located between the dehumidification heat exchanger and the first control valve, and the third intersection is located between the reheat heat exchanger and the second control valve;
after the step of fetching the mode instruction, further comprising:
And adjusting the working state of the third control valve according to the mode command.
Optionally, the mode instructions include a cooling mode instruction,
The step of adjusting the working state of the reversing device according to the mode instruction comprises the following steps:
the reversing device is adjusted to a first switching state according to a refrigerating mode instruction;
The step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
Opening the first control valve according to the refrigerating mode instruction, closing the second control valve, and opening the third control valve;
Or opening the first control valve, closing the second control valve and closing the third control valve according to the refrigerating mode command.
Optionally, the mode instructions include a cooling mode instruction,
The step of adjusting the working state of the reversing device according to the mode instruction comprises the following steps:
the reversing device is adjusted to a first switching state according to a refrigerating mode instruction;
The step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
Opening the first control valve according to the refrigerating mode instruction, closing the second control valve, and opening the third control valve;
And adjusting the opening degree of the dehumidification throttling adjusting device to be zero.
Optionally, the mode instructions include heating mode instructions,
The step of adjusting the working state of the reversing device according to the mode instruction comprises the following steps:
Adjusting the reversing device to a second switching state according to a heating mode instruction;
The step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
Closing the first control valve, opening the second control valve and opening the third control valve according to the heating mode instruction;
or opening the first control valve according to the heating mode command, closing the second control valve and opening the third control valve;
or opening the first control valve, opening the second control valve and closing the third control valve according to the heating mode instruction;
or opening the first control valve according to the heating mode command, closing the second control valve, and closing the third control valve;
or closing the first control valve, opening the second control valve and closing the third control valve according to the heating mode command.
Optionally, the mode instructions include heating mode instructions,
The step of adjusting the working state of the reversing device according to the mode instruction comprises the following steps:
Adjusting the reversing device to a second switching state according to a heating mode instruction;
The step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
Opening the first control valve, closing the second control valve and opening the third control valve according to the heating mode instruction;
the opening degree of the dehumidification throttling adjusting device is adjusted to be zero;
or the opening degree of the reheat throttle adjusting device is adjusted to zero.
Optionally, the mode instructions include heating mode instructions,
The step of adjusting the working state of the reversing device according to the mode instruction comprises the following steps:
Adjusting the reversing device to a second switching state according to a heating mode instruction;
The step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
opening the first control valve, opening the second control valve and closing the third control valve according to the heating mode instruction;
the opening degree of the dehumidification throttling adjusting device is adjusted to be zero;
or the opening degree of the reheat throttle adjusting device is adjusted to zero.
Optionally, the mode command includes a dehumidify reheat mode command,
The step of adjusting the working state of the reversing device according to the mode instruction comprises the following steps:
Adjusting the reversing device to a first switching state according to a dehumidifying and reheating mode instruction;
The step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
And opening the first control valve, opening the second control valve and closing the third control valve according to the dehumidification reheating mode command.
Optionally, the mode instruction includes a defrosting mode instruction, and the working state of the reversing device is adjusted according to the mode instruction; the step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
adjusting the reversing device to a first switching state according to a defrosting mode instruction;
opening the first control valve according to the defrosting mode command, opening the second control valve, and closing the third control valve;
Or opening the first control valve, closing the second control valve and opening the third control valve according to the defrosting mode command.
Optionally, the air conditioner includes a first indoor unit and a second indoor unit, and the mode instruction is acquired; the step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
Acquiring a first mode instruction of a first indoor unit and acquiring a second mode instruction of a second indoor unit;
And adjusting the working states of the first control valve, the second control valve and the third control valve of the first indoor unit according to the first mode instruction, and adjusting the working states of the first control valve, the second control valve and the third control valve of the second indoor unit according to the second mode instruction.
Optionally, the first mode command includes a cooling mode command, the second mode command includes a dehumidify reheat mode command,
The step of adjusting the working states of the first control valve, the second control valve and the third control valve of the first indoor unit according to the first mode instruction, and the step of adjusting the working states of the first control valve, the second control valve and the third control valve of the second indoor unit according to the second mode instruction comprises the following steps:
Opening a first control valve of the first indoor unit according to the refrigerating mode instruction, closing a second control valve of the first indoor unit, and opening a third control valve of the first indoor unit; and opening the first control valve of the second indoor unit, opening the second control valve of the second indoor unit and closing the third control valve of the second indoor unit according to the dehumidifying and reheating mode instruction.
Optionally, the first mode command includes a heating mode command, the second mode command includes a dehumidify reheat mode command,
The step of adjusting the working states of the first control valve and the second control valve of the first indoor unit according to the first mode instruction and the working states of the first control valve and the second control valve of the second indoor unit according to the second mode instruction includes:
Closing a first control valve of the first indoor unit, opening a second control valve of the first indoor unit and opening a third control valve of the first indoor unit according to a heating mode instruction; and opening the first control valve of the second indoor unit, opening the second control valve of the second indoor unit and closing the third control valve of the second indoor unit according to the dehumidifying and reheating mode instruction.
Optionally, the first mode instruction comprises a heating mode instruction, the second mode instruction comprises a cooling mode instruction,
The step of adjusting the working states of the first control valve and the second control valve of the first indoor unit according to the first mode instruction and the working states of the first control valve and the second control valve of the second indoor unit according to the second mode instruction includes:
Closing a first control valve of the first indoor unit, opening a second control valve of the first indoor unit and opening a third control valve of the first indoor unit according to a heating mode instruction; and opening the first control valve of the second indoor unit, closing the second control valve of the second indoor unit and opening the third control valve of the second indoor unit according to the refrigerating mode command.
Optionally, the air conditioner includes a first indoor unit, a second indoor unit, and a third indoor unit, and the mode instruction is acquired; the step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
Acquiring a first mode instruction of a first indoor unit, acquiring a second mode instruction of a second indoor unit and acquiring a third mode instruction of a third indoor unit;
Adjusting working states of a first control valve, a second control valve and a third control valve of the first indoor unit according to the first mode instruction, adjusting working states of the first control valve, the second control valve and the third control valve of the second indoor unit according to the second mode instruction, and adjusting working states of the first control valve, the second control valve and the third control valve of the third indoor unit according to the third mode instruction;
the first mode instruction comprises a refrigeration mode instruction, the second mode instruction comprises a heating mode instruction, and the third mode instruction comprises a dehumidifying and reheating mode instruction.
The air conditioner of the invention adopts the first control valve and the second control valve which are arranged in the indoor unit, the discharge pipe, the outdoor heat exchanger, the outdoor throttling adjusting device, the dehumidifying throttling adjusting device and the dehumidifying heat exchanger are connected in sequence through the first piping, and the dehumidifying heat exchanger, the first control valve and the low-pressure suction pipe are connected in sequence through the second piping, so as to form a dehumidifying loop; the first intersection of the first pipe, the reheating throttling adjusting device, the reheating heat exchanger, the second control valve and the first bifurcation are sequentially connected through a third pipe, so that a reheating loop is formed; when the first control valve and the second control valve are simultaneously opened, air passes through the dehumidifying heat exchanger and the reheating heat exchanger, and when the dehumidifying heat exchanger refrigerates and the reheating heat exchanger heats, dehumidification and reheating (without cooling and dehumidification) can be realized; when the first control valve is opened and the second control valve is closed, air passes through the dehumidifying heat exchanger, so that refrigeration can be realized. Therefore, the air conditioner can realize dehumidification and reheating and refrigeration, so that the functions of the air conditioner are increased, and the requirements of users can be met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic view of another embodiment of an air conditioner according to the present invention;
FIG. 3 is a schematic diagram of an air conditioner according to a further embodiment of the present invention in a cooling mode;
fig. 4 is a schematic structural view of an air conditioner according to a heating mode of the present invention;
FIG. 5 is a schematic view of an embodiment of an air conditioner in a dehumidifying and reheating mode according to the present invention;
FIG. 6 is a schematic view of an air conditioner according to another embodiment of the present invention;
FIG. 7 is a schematic view of an air conditioner according to another embodiment of the present invention;
FIG. 8 is a schematic view of an air conditioner according to another embodiment of the present invention in a cooling mode;
FIG. 9 is a schematic view of an air conditioner according to another embodiment of the present invention in a cooling mode;
FIG. 10 is a schematic view of an air conditioner according to another embodiment of the present invention in a cooling mode;
FIG. 11 is a schematic view of an air conditioner according to another embodiment of the present invention;
fig. 12 is a schematic structural view of a fifth embodiment of an air conditioner in a cooling mode according to the present invention;
fig. 13 is a schematic structural view of a sixth embodiment of an air conditioner in a cooling mode according to the present invention;
fig. 14 is a schematic structural view of a seventh embodiment of an air conditioner in a cooling mode according to the present invention;
fig. 15 is a schematic structural view of an eighth embodiment of an air conditioner in a cooling mode according to the present invention;
fig. 16 is a schematic view illustrating a structure of another embodiment of an air conditioner in a heating mode according to the present invention;
fig. 17 is a schematic view illustrating a structure of an air conditioner according to another embodiment of the present invention in a heating mode;
Fig. 18 is a schematic structural view of a fourth embodiment of an air conditioner according to the present invention in a heating mode;
fig. 19 is a schematic view showing the structure of a fifth embodiment of an air conditioner in a heating mode according to the present invention;
fig. 20 is a schematic structural view of a sixth embodiment of an air conditioner according to the present invention in a heating mode;
Fig. 21 is a schematic structural view of a seventh embodiment of an air conditioner in a heating mode according to the present invention;
Fig. 22 is a schematic structural view of an eighth embodiment of an air conditioner in a heating mode according to the present invention;
fig. 23 is a schematic structural view of a ninth embodiment of an air conditioner in a heating mode according to the present invention;
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B meet at the same time.
Hereinafter, a specific structure of the air conditioner will be mainly described.
Referring to fig. 1 to 5, the whole piping structure and component arrangement of the air conditioner will be described first; in an embodiment of the present invention, the air conditioner includes an outdoor unit 100 and an indoor unit 200, the outdoor unit 100 includes a compression mechanism 110, an outdoor heat exchanger 150, and an outdoor throttle adjusting device 120, and the indoor unit 200 includes a dehumidifying heat exchanger 210, a dehumidifying throttle adjusting device 230, and a first control valve 250;
The air conditioner further includes: a discharge pipe 111 connected to a discharge side of the compression mechanism 110, a low pressure suction pipe 113 connected to a low pressure suction side of the compression mechanism 110, a first pipe 160 sequentially connected to the discharge pipe 111, the outdoor heat exchanger 150, the outdoor throttle control device 120, the dehumidification throttle control device 230, and the dehumidification heat exchanger 210, and a second pipe 170 sequentially connected to the dehumidification heat exchanger 210, the first control valve 250, and the low pressure suction pipe 113, thereby forming a dehumidification circuit;
the indoor unit 200 further includes a reheat heat exchanger 220, a reheat throttle adjusting device 240, a second control valve 260, and a heat cycle device for feeding heat or cold of the indoor unit 200 into a room;
The air conditioner further includes a third pipe 180 and a first branch pipe 112 branched from the discharge pipe 111, wherein the third pipe 180 connects the first junction 161 of the first pipe 160, the reheat throttle adjusting device 240, the reheat heat exchanger 220, the second control valve 260, and the first branch pipe 112 in this order, thereby forming a reheat circuit, wherein the first junction 161 is located between the dehumidification throttle adjusting device 230 and the outdoor throttle adjusting device 120.
Wherein the thermal cycle device may be an air supply device in some embodiments, the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 are disposed in an air flow path formed by the air supply device. Specifically, the air supply device may be a wind wheel, and the wind wheel rotates to convey the air after heat exchange with the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 to the indoor. Of course, in other embodiments, the thermal cycle may also be a water cycle, with the dehumidification heat exchanger 210 and the reheat heat exchanger 220 delivering heat or cold to the room through the circulating water flowing in the water cycle.
On the basis of the above pipelines, the dehumidifying heat exchanger 210 of the air conditioner refrigerates and the reheating heat exchanger 220 heats, so that constant-temperature dehumidification can be realized. Wherein the dehumidification throttle adjusting device 230 comprises a dehumidification throttle valve, and the reheat throttle adjusting device 240 comprises a reheat throttle valve. Here, the dehumidification throttle valve and the reheat throttle valve may use electronic expansion valves.
In addition, the first control valve 250 and the second control valve 260 are solenoid valves or electric valves. By adjusting the operation states of the first control valve 250 and the second control valve 260, the air conditioner can be made to realize the operation modes of cooling and dehumidifying and reheating. Specifically, when the first control valve 250 and the second control valve 260 are opened at the same time, air may pass through the dehumidifying heat exchanger 210 and then the reheating heat exchanger 220, and when the dehumidifying heat exchanger 210 cools and the reheating heat exchanger 220 heats, dehumidification and reheating may be achieved; when the first control valve 250 is opened and the second control valve 260 is closed, air passes through the dehumidifying heat exchanger 210, and refrigeration can be achieved. Therefore, the air conditioner can realize dehumidification and reheating and refrigeration, so that the functions of the air conditioner are increased, and the requirements of users can be met.
In some embodiments, the indoor unit 200 further includes a third control valve 270 and a second branch pipe 280, and the second branch pipe 280 connects in sequence a second crossing point 281 of the second pipe 170, the third control valve 270, and a third crossing point 282 of the third pipe 180, wherein the second crossing point 281 is located between the dehumidifying heat exchanger 210 and the first control valve 250, and the third crossing point 282 is located between the reheating heat exchanger 220 and the second control valve 260.
Wherein, the third control valve 270 is a solenoid valve or an electric valve. By adjusting the operation states of the first control valve 250, the second control valve 260 and the third electric valve 270, the air conditioner can realize various operation modes such as refrigeration, heating, dehumidification and reheating. For example, when the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened, refrigeration can be realized; the first control valve 250 is closed, the second control valve 260 is opened, and the third control valve 270 is opened, so that heating can be realized; when the first control valve 250 is opened, the second control valve 260 is opened, and the third control valve 270 is closed, dehumidification and reheating can be achieved.
Cooling mode:
Referring to fig. 3, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, is then throttled by the dehumidification throttle adjusting device 230 and the reheat throttle adjusting device 240, enters the dehumidification heat exchanger 210 and the reheat heat exchanger 220 to perform refrigeration, and finally merges and flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. In the process, the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened.
Referring to fig. 8, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, flows into the dehumidifying heat exchanger 210 to perform cooling, and finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. This mode is a normal cooling mode in which only the dehumidifying heat exchanger 210 cools. In the process, the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is closed.
Referring to fig. 9, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, flows into the reheat heat exchanger 220 to perform cooling, and finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. This mode is a normal cooling mode in which only reheat heat exchanger 220 is cooling. In the process, the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened; the opening degree of the dehumidification throttle adjusting device 230 is adjusted to zero. It should be emphasized that when the adjustment of the opening degree of the throttle adjusting device to zero is not particularly emphasized, the throttle adjusting device (the dehumidification throttle adjusting device 230 or the reheat throttle adjusting device 240) is shown in an open state, and the opening degree of the throttle adjusting device can be adjusted according to actual needs.
Referring to fig. 10, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, flows into the dehumidifying heat exchanger 210 to perform cooling, and finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. This mode is a normal cooling mode in which only the dehumidifying heat exchanger 220 cools. In the process, the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened; the opening degree of the reheat throttle adjusting device 240 is adjusted to zero.
Dehumidification reheat mode:
Referring to fig. 5, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, a part of the refrigerant flows into the first pipe 160, another part of the refrigerant flows into the third pipe 180 through the first branch pipe 112, flows into the reheat heat exchanger 220, and the reheated and dehumidified air is throttled by the reheat throttle adjusting device 240 to form a high-pressure refrigerant, the high-pressure refrigerant is converged with the refrigerant in the first pipe 160, flows into the dehumidification heat exchanger 210, evaporates the dehumidified air, and finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. In the process, the first control valve 250 is opened, the second control valve 260 is opened, and the third control valve 270 is closed.
In some embodiments, referring to fig. 11, the indoor unit 100 further includes a fourth control valve 290 and a third branch pipe 291 branching from the second pipe 170, the third branch pipe 291 connecting the fourth control valve 290 and a third crossing point 281 of the third pipe 180.
By providing the fourth control valve 290, more possibilities are provided for the air conditioner to perform cooling. Referring to fig. 12, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, is then throttled by the dehumidification throttle adjusting device 230 and the reheat throttle adjusting device 240, enters the dehumidification heat exchanger 210 and the reheat heat exchanger 220 to perform refrigeration, finally merges and flows into the third branch pipe 291, and flows back to the second pipe 170 through the third branch pipe 291, and further flows back into the compression mechanism 110. In the process, the first control valve 250 is closed, the second control valve 260 is closed, the third control valve 270 is opened, and the fourth control valve 290 is opened.
Referring to fig. 13, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, then a part of the refrigerant enters the dehumidifying heat exchanger 210 to perform cooling through the dehumidifying throttle adjusting device 230, and another part of the refrigerant enters the reheating heat exchanger 220 to perform cooling through the reheating throttle adjusting device 240, finally flows into the second pipe 170 in a converging manner, and flows back into the compression mechanism 110 through the second pipe 170. In the process, the first control valve 250 is opened, the second control valve 260 is closed, the third control valve 270 is closed, and the fourth control valve 290 is opened.
Referring to fig. 14, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, then enters the reheat heat exchanger 220 through the reheat throttle adjusting device 240 to perform cooling, finally flows into the third branch pipe 291, flows back to the second pipe 170 through the third branch pipe 291, and further flows back into the compression mechanism 110. In this process, the first control valve 250 is closed, the second control valve 260 is closed, the third control valve 270 is opened, the fourth control valve 290 is opened, and the opening degree of the dehumidification throttle adjustment device 230 is set to zero.
Referring to fig. 15, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, then enters the dehumidifying heat exchanger 210 through the dehumidifying throttle adjusting device 230 to perform cooling, finally flows into the third branch pipe 291, flows back to the second pipe 160 through the third branch pipe 291, and further flows back into the compression mechanism 110. In the process, the first control valve 250 is closed, the second control valve 260 is closed, the third control valve 270 is opened, the fourth control valve 290 is opened, and the opening degree of the reheat throttle adjusting device 240 is set to zero.
In some embodiments, referring to fig. 2, the outdoor unit 100 further includes a reversing device 140, the reversing device 140 having a first switching state and a second switching state,
In the first switching state, the reversing device 140 communicates the discharge pipe 111 with the first pipe 160, and communicates the low-pressure suction pipe 113 with the second pipe 170;
In the second switching state, the reversing device 140 communicates the discharge pipe 111 with the second pipe 170, and communicates the low-pressure suction pipe 113 with the first pipe 160.
By providing the reversing device 140, the flow path of the refrigerant can be changed, thereby changing the operation mode of the air conditioner. In the first switching state, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, one part flows into the first pipe 160, the other part flows into the third pipe 180 through the first branch pipe 112, and finally flows back into the compression mechanism 110 from the second pipe 170; in the first switching state, the air conditioner can realize refrigeration and dehumidification reheating. In the second switching state, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, one part flows into the second pipe 170, the other part flows into the third pipe 180 through the first branch pipe 112, and finally flows back into the compression mechanism 110 from the first pipe 160; in the second switching state, the air conditioner can realize heating.
Of course, in other embodiments, the indoor unit 200 further includes a third control valve 270 and a second branch pipe 280, wherein the second branch pipe 280 connects a second crossing point 281 of the second pipe 170, the third control valve 270, and a third crossing point 282 of the third pipe 180 in sequence, wherein the second crossing point 281 is located between the dehumidifying heat exchanger 210 and the first control valve 250, and the third crossing point 282 is located between the reheating heat exchanger 220 and the second control valve 260;
The outdoor unit 100 further includes a reversing device 140, the reversing device 140 having a first switching state in which the reversing device 140 communicates the discharge pipe 111 with the first pipe 160 and communicates the low pressure suction pipe 113 with the second pipe 170; in the second switching state, the reversing device 140 communicates the discharge pipe 111 with the second pipe 170, and communicates the low-pressure suction pipe 113 with the first pipe 160.
It should be noted that, by setting the reversing device 140, the first control valve 250, the second control valve 260, and the third control valve 270, not only the flow path of the refrigerant in the air conditioner can be changed, but also the air conditioner can realize multiple modes such as refrigeration, heating, dehumidification and reheating. Several modes of operation of the air conditioner will be described in detail below in connection with specific embodiments.
Cooling mode:
Referring to fig. 2 and 3, the reversing device 140 is adjusted to a first switching state; the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened. Here, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, is throttled by the dehumidification throttle device 230 and the reheat throttle device 240, flows into the heat exchangers connected in series, cools, and flows into the second pipe 170 after merging the last two parts of the refrigerant, and flows back into the compression mechanism 110 through the second pipe 170. This mode is a forced cool mode in which both the dehumidified heat exchanger 210 and the reheat heat exchanger 220 are cooling.
Referring to fig. 8, the reversing device 140 is adjusted to a first switching state; the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is closed. Here, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, flows into the dehumidifying heat exchanger 210 to perform cooling, and finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. This mode is a normal cooling mode in which only the dehumidifying heat exchanger 210 cools.
Referring to fig. 9, the reversing device 140 is adjusted to a first switching state; the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened; the opening degree of the dehumidification throttle adjusting device 230 is adjusted to zero. Here, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, flows into the reheat heat exchanger 220 to perform cooling, finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. This mode is a normal cooling mode in which only reheat heat exchanger 220 is cooling.
Referring to fig. 10, the reversing device 140 is adjusted to a first switching state; the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened; the opening degree of the reheat throttle adjusting device 240 is adjusted to zero. Here, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, flows into the dehumidifying heat exchanger 210 to perform cooling, and finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. This mode is a normal cooling mode in which only the dehumidifying heat exchanger 220 cools.
Heating mode:
Referring to fig. 4, the reversing device 140 is adjusted to a second switching state; the first control valve 250 is closed, the second control valve 260 is opened, and the third control valve 270 is opened; here, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the third pipe 180 through the first branch pipe 112, flows into the reheat heat exchanger 220 and the dehumidification heat exchanger 210, heats the refrigerant, merges the two refrigerant components, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a forced heat mode in which both the dehumidified heat exchanger 210 and the reheat heat exchanger 220 heat.
Referring to fig. 16, the reversing device 140 is adjusted to a second switching state; the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened; here, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the dehumidification heat exchanger 210 and the reheat heat exchanger 220 through the second pipe 170, and heats the two refrigerant components, and the two refrigerant components are joined and then flow into the first pipe 160, and flow back into the compression mechanism 110 through the first pipe 160. This mode is a forced heat mode in which both the dehumidified heat exchanger 210 and the reheat heat exchanger 220 heat.
Referring to fig. 17, the reversing device 140 is adjusted to a second switching state; the first control valve 250 is opened, the second control valve 260 is opened, and the third control valve 270 is closed; here, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, and a part of the refrigerant flows into the third pipe 180 through the first branch pipe 112, flows into the reheat heat exchanger 220, and is heated; the other part flows into the dehumidifying heat exchanger 210 through the second pipe 170 to be heated, and the two last parts of the refrigerant are joined and then flow into the first pipe 160, and flow back into the compression mechanism 110 through the first pipe 160. This mode is a forced heat mode in which both the dehumidified heat exchanger 210 and the reheat heat exchanger 220 heat.
Referring to fig. 18, the reversing device 140 is adjusted to a second switching state; the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is closed; here, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the dehumidifying heat exchanger 210 through the second pipe 170 to be heated, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which heat is generated by the dehumidifying heat exchanger 210.
Referring to fig. 19, the reversing device 140 is adjusted to a second switching state; the first control valve 250 is closed, the second control valve 260 is open, and the third control valve 270 is closed. Here, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the third pipe 180 through the first branch pipe 112, flows into the reheat heat exchanger 220 to be heated, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which only the reheat heat exchanger 220 heats.
Referring to fig. 20, the reversing device 140 is adjusted to a second switching state; the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened; the opening degree of the dehumidification throttle adjusting device 230 is adjusted to zero. Here, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the reheat heat exchanger 220 through the second pipe 170 to be heated, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which only the reheat heat exchanger 220 heats.
Referring to fig. 21, the reversing device 140 is adjusted to a second switching state; the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened; the opening degree of the reheat throttle adjusting device 240 is adjusted to zero. Here, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the reheat heat exchanger 220 through the second pipe 170 to be heated, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which only the reheat heat exchanger 220 heats.
Referring to fig. 22, the reversing device 140 is adjusted to a second switching state; the first control valve 250 is opened, the second control valve 260 is opened, and the third control valve 270 is closed; the opening degree of the reheat throttle adjusting device 240 is adjusted to zero. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the dehumidifying heat exchanger 210 through the second pipe 170 to be heated, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which only the dehumidifying heat exchanger 210 heats.
Referring to fig. 23, the reversing device 140 is adjusted to a second switching state; the first control valve 250 is opened, the second control valve 260 is opened, and the third control valve 270 is closed; the opening degree of the dehumidification throttle adjusting device 230 is adjusted to zero. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the third pipe 180 through the first branch pipe 112, flows into the reheat heat exchanger 220 to perform heating, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which only the reheat heat exchanger 220 heats.
Dehumidification reheat mode:
Referring to fig. 5, the reversing device 140 is adjusted to a first switching state; the first control valve 250 is opened, the second control valve 260 is opened, and the third control valve 270 is closed. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, a part of the refrigerant flows into the first pipe 160, another part of the refrigerant flows into the third pipe 180 through the first branch pipe 112, the air which has been reheated and dehumidified in the reheat heat exchanger 220 is throttled to form a high-pressure refrigerant by the reheat throttle adjusting device 240, the high-pressure refrigerant merges with the refrigerant in the first pipe 160, the high-pressure refrigerant flows into the dehumidification heat exchanger 210, the dehumidified air is evaporated, and the evaporated air flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170.
In some embodiments, referring to fig. 1, 2, 6 and 7, the air conditioner includes a plurality of indoor units 200, for example, two, three or more indoor units 200 may include different heat exchanger types, for example, an indoor unit with thermostatic dehumidification function (having both a dehumidification heat exchanger 210 and a reheat heat exchanger 220, a common cooling/heating indoor unit (having only one heat exchanger and a corresponding throttle adjustment device), and an indoor unit with a reversing device 140 capable of freely switching cooling or heating states, so that the air conditioner may perform a mixed operation of cooling, heating, dehumidifying and reheating.
Specifically, the air conditioner further includes a first connection pipe 310 (shown in fig. 1) branched from a fourth crossing point 311 of the first pipe 160, a second connection pipe 320 (shown in fig. 2) branched from the second pipe 170, and a third connection pipe 330 (shown in fig. 3) branched from the third pipe 180, the fourth crossing point 311 being located between the dehumidification throttle control device 230 and the outdoor heat exchanger 150; the air conditioner further includes a plurality of indoor units 200, and a plurality of the indoor units 200 are connected in parallel to the first, second and third connection pipes 310, 320 and 330.
The plurality of indoor units can be all refrigeration, all dehumidification and reheating, or part of indoor units are refrigeration, and the other part of indoor units are dehumidification and reheating.
For example, referring to fig. 6, the air conditioner includes a first indoor unit and a second indoor unit, and the first indoor unit and the second indoor unit may both heat, dehumidify and reheat the first indoor unit and the second indoor unit, and of course, the first indoor unit may also cool, and the second indoor unit may dehumidify and reheat the second indoor unit.
Specifically, referring to fig. 6, the reversing device 140 is switched to a first switching state, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, one part of the refrigerant flows into the first pipe 160, the other part of the refrigerant flows into the third pipe 180 through the first branch pipe 112, and after the refrigerant flows through the indoor unit 200 to complete the operation, the refrigerant flows back into the compression mechanism 110 through the second pipe 170. Wherein the first control valve 250 of the first indoor unit is opened, the second control valve 260 is closed, the third control valve 270 is opened, and the first indoor unit can realize refrigeration; the first control valve 250 of the second indoor unit is opened, the second control valve 260 is opened, and the second indoor unit can perform dehumidification and reheating when the third control valve 270 is closed.
It should be noted that, when the reversing device 140 is switched to the first switching state, at least two indoor units 200 of the plurality of indoor units 200 need to be turned on simultaneously in order to recover waste heat, and at least one indoor unit 200 performs cooling or dehumidification reheating among the at least two turned on indoor units 200. That is, at least two indoor units 200 that are turned on cannot be simultaneously heated. At this time, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, and a small portion flows into the first pipe 160 to maintain the balance of the system, and another portion flows into the third pipe 180 through the first branch pipe 112; the heated indoor unit 200 introduces the refrigerant from the third pipe 180, and the high-pressure liquid refrigerant formed after heating enters the first pipe 160, then enters the cooled or dehumidified and reheated indoor unit 200, is cooled by evaporation or dehumidified in the cooled or dehumidified and reheated indoor unit 200, and then flows back to the compression mechanism 110 through the second pipe 170. Therefore, waste heat discharged into the atmosphere can be reduced, waste heat utilization is realized, and energy consumption ratio is improved, so that energy conservation and environmental protection are realized.
Of course, when the reversing device 140 is switched to the second switching state, all of the plurality of indoor units may be heated. For example, referring to fig. 7, the reversing device 140 is switched to the second switching state, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, one part of the refrigerant flows into the second pipe 170, the other part of the refrigerant flows into the third pipe 180 through the first branch pipe 112, and after the operation of each part of refrigerant flowing through the indoor unit 200 is completed, the refrigerant flows back into the compression mechanism 110 through the first pipe 160. Wherein the first control valve 250 of the first indoor unit is closed, the second control valve 260 is opened, and the third control valve 270 is opened; the first control valve 250 of the second indoor unit is opened, the second control valve 260 is opened, and the third control valve 270 is closed; but is not limited thereto.
It is worth mentioning that the air conditioner can also realize the combination of three modes of refrigeration, heating and dehumidification reheat. For example, referring to fig. 2, the air conditioner includes a first indoor unit, a second indoor unit, and a third indoor unit, wherein the first indoor unit is cooled, the second indoor unit is heated, and the third indoor unit is dehumidified and reheated. Specifically, the reversing device 140 is switched to a first switching state; the first control valve 250 of the first indoor unit is opened, the second control valve 260 is closed, and the third control valve 270 is opened (as shown in fig. 3); the first control valve 250 of the second indoor unit is closed, the second control valve 260 is opened, and the third control valve 270 is opened (as shown in fig. 4); the first control valve 250 of the third indoor unit is opened, the second control valve 260 is opened, and the third control valve 270 is closed (as shown in fig. 5). In this embodiment, the refrigerant flowing out of the second indoor unit for heating must flow into the first indoor unit for cooling or the third indoor unit for dehumidification and reheating for heat exchange, and then flow back into the second pipe 170 and flow back into the compression mechanism 110 through the second pipe 170.
In some embodiments, to increase the capacity of the air conditioner to heat at low temperatures, the air conditioner further includes an economizer 190; the economizer 190 is provided in the first pipe 160 between the outdoor heat exchanger 150 and the first cross point 161, and a return pipe of the economizer 190 communicates with a medium pressure suction port of the compression mechanism 110. The form of back flow can have multiple, the back flow can only include the back flow body, also can include back flow body and first connecting pipe, and the one end of first connecting pipe communicates with the back flow body, and the other end communicates with the suction inlet of compressor. The compression mechanism 110 is an enhanced vapor injection compressor, and has a low-pressure suction port and a medium-pressure suction port.
The economizer 190 has a throttling function, a first refrigerant flow path and a second refrigerant flow path are arranged in the economizer 190, and two ends of the first refrigerant flow path are respectively communicated with the first piping 160 at two ends of the economizer 190; one end of the second refrigerant flow path is communicated with the first tubing 160 through a liquid taking pipe 192, and the other end is communicated with a medium pressure suction inlet of the compressor through a return pipe; the liquid-taking pipe 192 is provided with a liquid-taking throttle 191. One end of the first refrigerant fluid is communicated with a refrigerant inlet of the economizer 190, and the other end is communicated with a refrigerant outlet of the economizer 190. One end of the liquid taking pipe 192 communicates with the first pipe 160, the other end communicates with the second refrigerant flow path, one end of the return pipe communicates with the intermediate pressure suction port of the compressor, and the other end communicates with the second refrigerant flow path.
In this way, the compressor exhaust gas enters the reheat heat exchanger 220 and the dehumidification heat exchanger 210 to be heated, and the liquid refrigerant exiting from the reheat heat exchanger 220 and the dehumidification heat exchanger 210 enters the economizer 190 to be divided into two parts: the first part directly enters the outdoor heat exchanger 150 to absorb heat through the outdoor throttle adjusting device 120 (electronic expansion valve) after throttle and depressurization, the second part enters the economizer 190 to absorb heat and evaporate through the liquid taking pipe 192 after throttle and depressurization through the liquid taking throttle valve 191 (electronic expansion valve), and the evaporated medium-pressure saturated steam enters the medium-pressure air suction port of the compressor through the return pipe and is compressed after being mixed with the refrigerant of the low-pressure air suction port of the compressor, so that the problems of small refrigerant flow, low return air pressure, high compression ratio and the like in a low-temperature environment are solved, and the low-temperature heating quantity and the reliability of the system are improved. Through the technology of the invention, when the outdoor environment temperature is low, the system design of the jet enthalpy-increasing compressor and the economizer 190 increases the refrigerant suction amount in the low-temperature environment of the compressor, thereby improving the low-temperature heating amount, reducing the compression ratio in the low-temperature environment and improving the reliability of the system.
In other embodiments, in order to avoid the refrigerant in vapor-liquid two phases from generating unpleasant noise when passing through the indoor throttling device, the air conditioner further comprises a vapor-liquid separator 130 and an economizer 190, wherein the vapor-liquid separator 130 is arranged on the low pressure suction pipe 113; the economizer 190 is provided in the first pipe 160 between the outdoor heat exchanger 150 and the first cross 161, and a return pipe of the economizer 190 communicates with the gas-liquid separator 130. The form of the return pipe can be various, and the return pipe can only comprise a return pipe body, and also can comprise a return pipe body and a second communicating pipe, wherein one end of the second communicating pipe is communicated with the return pipe body, and the other end of the second communicating pipe is communicated with the gas-liquid separator 130.
For ease of control, in some examples, a control valve is provided on the return line or on a communication line between the return line and the intermediate pressure suction inlet of the compressor; the return pipe is communicated with the gas-liquid separator 130 through the low pressure suction pipe 113, and a control valve is arranged on the return pipe or a connecting pipe between the return pipe and the low pressure suction pipe 113.
According to the invention, by adopting the system design with the economizer 190 on the basis of the three-pipe dehumidification reheating scheme, the liquid taking throttle valve 191 (electronic expansion valve) in the system design loop with the economizer 190 is controlled, so that the condensing temperature of the refrigerant at the outlet of the outdoor heat exchanger 150 is further reduced, the supercooling degree is improved, the refrigerant is completely condensed into a liquid state, the liquid refrigerant enters the indoor heat exchanger for absorbing heat and evaporating after being throttled and decompressed by the indoor electronic expansion valve, and the abnormal noise of the refrigerant generated by the gas-liquid two-phase state can be solved when the refrigerant passing through the indoor throttle device is in a full liquid state.
The high-pressure high-temperature gaseous refrigerant enters the outdoor heat exchanger 150 to perform condensation heat exchange, and the gas-liquid two-phase medium-temperature high-pressure refrigerant exiting the outdoor heat exchanger 150 enters the economizer 190 and is divided into two parts: the first part is throttled and depressurized by a liquid-taking throttle valve 191 and then enters an economizer 190 through a liquid-taking pipe 192 to absorb heat and evaporate, the evaporated gaseous refrigerant enters the gas-liquid separator 130 through a return pipe, a control valve (electromagnetic valve) and a connecting pipe and then enters a compressor air suction port together with the gaseous refrigerant after absorbing heat and evaporating by an indoor heat exchanger, the second part is further condensed and exchanges heat from the economizer 190 and then turns into a pure liquid refrigerant, and the part of pure liquid refrigerant flows into a room and enters a dehumidifying heat exchanger 210 and a reheating heat exchanger 220 to absorb heat and evaporate after being throttled and depressurized by a dehumidifying throttle valve and a reheating throttle valve respectively. The refrigerant state entering the dehumidification regulating valve and the reheating regulating valve (electronic expansion valve) is changed from a gas-liquid two-phase state to a pure liquid state, so that the problem of refrigerant abnormal sound generated when the gas-liquid two-phase state refrigerant passes through the throttling device is solved.
In some embodiments, the air conditioner is also used to supply water for floor heating or to prepare domestic water for people.
When the air conditioner further comprises a floor heating module, the air conditioner further comprises a heat exchange water tank and a floor heating water flow pipe communicated with the heat exchange water tank; a floor heating heat exchanger is disposed in the heat exchange water tank, a refrigerant inlet of the floor heating heat exchanger is communicated with a third pipe 180, a refrigerant outlet is communicated with a first pipe 160, and a fifth control valve is disposed on a second pipe 170.
Specifically, in this embodiment, the ground heating water pipe may be buried in the ground or in the wall, and the ground heating water pipe is communicated with the heat exchange water tank, and water in the heat exchange water tank may circulate in the ground heating water pipe, so that the water temperature in the ground heating water pipe is equivalent to the water temperature in the heat exchange water tank. When the high-temperature and high-pressure refrigerant passes through, the floor heating heat exchanger exchanges heat with water in the heat exchange water tank to heat cold water in the water tank; when the low-pressure refrigerant passes through, the floor heating heat exchanger exchanges heat with water in the heat exchange water tank to cool the water in the heat exchange water tank. When the floor heating heat exchanger works, the fifth control valve can be selectively closed (closed when the floor heating is needed to be heated efficiently), and at this time, the outdoor unit 100 mainly serves the floor heating heat exchanger, so as to improve the heat exchange efficiency of the floor heating heat exchanger.
In still other embodiments, the air conditioner further comprises: a first connection pipe 310 branching from a fourth intersection 311 of the first pipe 160, a second connection pipe 320 branching from the second pipe 170, the fourth intersection 311 being located between the dehumidification throttle control device 230 and the outdoor heat exchanger 150; the air conditioner further includes a water treatment device including a water heat exchanger for heating or cooling water in the water container and a water container connected in parallel with the indoor unit 200 to the first connection pipe 310 and the second connection pipe 320. The water heat exchangers are used for heating or refrigerating water in the water containers, and of course, the water containers can be multiple, and the water heat exchangers can be arranged in parallel, so that one water container can hold hot water, and the other water container can hold cold water, and cold water and hot water can be supplied simultaneously. When water needs to be heated, the water heat exchanger is internally provided with a high-temperature refrigerant so as to transfer heat energy to water in the container; when the cold water is needed to be refrigerated, the water heat exchanger is made to pass through the low-temperature refrigerant so as to transfer the cold energy to the water in the container.
In some embodiments, the indoor unit further comprises electric auxiliary heat. Wherein the electric auxiliary heat is located between the dehumidifying heat exchanger 210 and the reheating heat exchanger 220; or the electric auxiliary heat is located at a side of the dehumidifying heat exchanger 210 remote from the reheating heat exchanger 220; or the electric auxiliary heat is located at a side of the reheat heat exchanger 220 remote from the dehumidification heat exchanger 210. Here, the specific position of the electric auxiliary heat is not limited. Auxiliary heating is performed by setting electric auxiliary heat, so that the indoor temperature is not too low, and the use comfort of the air conditioner is improved. For example, when the dehumidifying heat exchanger 210 or the reheating heat exchanger 220 is independently turned on, the indoor temperature is low, and at this time, auxiliary heating can be performed by electric auxiliary heating, so that the indoor temperature is rapidly increased, and the experience comfort of a user is improved.
The invention also provides a control method of the air conditioner aiming at the air conditioner, which comprises the following steps:
S10, acquiring a mode instruction;
Specifically, in this embodiment, there are various modes for obtaining the mode instruction, which can obtain the instruction sent by the external terminal, such as a mobile phone, a remote controller, and the like; can also be obtained from other household appliances, such as electric fans, air purifiers, etc.; the method can also be obtained by detecting the operation parameters of the method or detecting external environment parameters such as indoor temperature; of course, it may also be acquired from the cloud. The mode instructions may include cooling, heating, dehumidifies reheat, defrosting, non-sensible defrosting, user demand (e.g., temperature 15 ℃), and the like.
And S20, adjusting the working states of the first control valve 250 and the second control valve 260 according to the mode command. According to different mode instructions, the working states of the first control valve 250 and the second control valve 260 are adjusted, for example, when in refrigeration, the first control valve 250 is opened, and the second control valve 260 is closed, so that air passes through the dehumidifying heat exchanger 210, and refrigeration can be realized; when dehumidification and reheating are performed, the first control valve 250 and the second control valve 260 are opened, so that air can pass through the dehumidification heat exchanger 210 and then the reheating heat exchanger 220, and when the dehumidification heat exchanger 210 is used for refrigerating and the reheating heat exchanger 220 is used for heating, dehumidification and reheating can be realized.
In this embodiment, by adjusting the working states of the first control valve 250 and the second control valve 260, the air conditioner can realize dehumidification and reheating, and can also realize refrigeration, so that the functions of the air conditioner are increased, and the requirements of users can be met.
For example, the mode command includes a cooling mode command, and the step of adjusting the operation states of the first control valve 250 and the second control valve 260 according to the mode command includes:
The first control valve 250 is opened and the second control valve 260 is closed according to the cooling mode command.
Specifically, when the first control valve 250 is opened and the second control valve 260 is closed, air passes through the dehumidifying heat exchanger 210, and cooling can be achieved.
For another example, the mode command includes a dehumidifying reheat mode command, and the adjusting the operating states of the first control valve 250 and the second control valve 260 according to the mode command includes:
The first control valve 250 is opened and the second control valve 260 is opened according to the dehumidifying reheat mode command.
Specifically, when the first control valve 250 and the second control valve 260 are simultaneously opened, air may pass through the dehumidifying heat exchanger 210 and then the reheating heat exchanger 220, and dehumidification and reheating may be achieved when the dehumidifying heat exchanger 210 is cooled and the reheating heat exchanger 220 is heated.
It should be noted that, not generally, the control method of the air conditioner further includes adjusting the opening degrees of the dehumidification throttle adjusting device 230 and the reheat throttle adjusting device 240 according to the mode command. For example, the opening degrees of the dehumidification throttle adjusting device 230 and the reheat throttle adjusting device 240 are adjusted to be larger or smaller according to the mode command.
In some embodiments, after the step of fetching the mode instruction, further comprises:
and S30, adjusting the working state of the third control valve 270 according to the mode command.
The indoor unit 200 further includes a third control valve 270 and a second branching pipe 280, wherein the second branching pipe 280 connects in sequence a second crossing point 281 of the second pipe 170, the third control valve 270, and a third crossing point 282 of the third pipe 180, wherein the second crossing point 281 is located between the dehumidifying heat exchanger 210 and the first control valve 250, and the third crossing point 282 is located between the reheating heat exchanger 220 and the second control valve 260.
The sequence of the step of adjusting the working states of the third control valve 270 according to the mode command and the step of adjusting the working states of the first control valve 250 and the second control valve 260 according to the mode command is not limited. That is, the order of adjusting the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command is not limited.
By adjusting the operation states of the first control valve 250, the second control valve 260 and the third electric valve 270, the air conditioner can realize various operation modes such as refrigeration, heating, dehumidification and reheating. For example, when the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened, refrigeration can be realized; the first control valve 250 is closed, the second control valve 260 is opened, and the third control valve 270 is opened, so that heating can be realized; when the first control valve 250 is opened, the second control valve 260 is opened, and the third control valve 270 is closed, dehumidification and reheating can be achieved.
The following is a description of the requirements of the different modes of operation:
the mode command includes a cooling mode command, and the step of adjusting the operation states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
Opening the first control valve 250, closing the second control valve 260, and opening the third control valve 270 (as shown in fig. 3) according to the cooling mode command;
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, is throttled by the dehumidification throttle control device 230 and the reheat throttle control device 240, enters the dehumidification heat exchanger 210 and the reheat heat exchanger 220, cools, and finally merges and flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. The cooling mode is a forced cooling mode in which both the dehumidified heat exchanger 210 and the reheat heat exchanger 220 are cooling.
Or the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is closed according to the cooling mode command (as shown in fig. 8);
in this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160, the outdoor heat exchanger 150, and the dehumidification throttle control device 230, enters the dehumidification heat exchanger 210, cools, finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. The cooling mode is a normal cooling mode in which only the dehumidifying heat exchanger 210 cools.
Or the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened according to the cooling mode command; the opening degree of the dehumidification throttle adjusting device 230 is adjusted to zero (as shown in fig. 9);
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, flows into the reheat heat exchanger 220 to perform cooling, and finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. This mode is a normal cooling mode in which only reheat heat exchanger 220 is cooling.
Or the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened according to the cooling mode command; the opening degree of the reheat throttle adjusting device 240 is adjusted to zero (as shown in fig. 10).
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, flows into the dehumidifying heat exchanger 210 to perform cooling, and finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. This mode is a normal cooling mode in which only the dehumidifying heat exchanger 220 cools.
The mode command includes a dehumidifying and reheating mode command, and the step of adjusting the operating states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
The first control valve 250 is opened, the second control valve 260 is opened, and the third control valve 270 is closed according to the dehumidification reheat mode command (as shown in fig. 5).
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, a part of the refrigerant flows into the first pipe 160, another part of the refrigerant flows into the third pipe 180 through the first branch pipe 112, the air which has been reheated and dehumidified in the reheat heat exchanger 220 is throttled by the reheat throttle adjusting device 240 to form a high-pressure refrigerant, the high-pressure refrigerant is merged with the refrigerant in the first pipe 160, the high-pressure refrigerant flows into the dehumidification heat exchanger 210 to evaporate the dehumidified air, and finally the high-pressure refrigerant flows into the second pipe 170 and flows back into the compression mechanism 110 through the second pipe 170.
In other embodiments, the step of fetching the mode instruction further comprises, after:
and S40, adjusting the working state of the reversing device 140 according to the mode instruction.
The outdoor unit 100 further includes a reversing device 140, the reversing device 140 having a first switching state in which the reversing device 140 communicates the discharge pipe 111 with the first pipe 160 and communicates the low pressure suction pipe 113 with the second pipe 170; in the second switching state, the reversing device 140 communicates the discharge pipe 111 with the second pipe 170, and communicates the low-pressure suction pipe 113 with the first pipe 160.
The sequence of the step of adjusting the working state of the reversing device 140 according to the mode command and the step of adjusting the working states of the first control valve 250 and the second control valve 260 according to the mode command is not limited. That is, the order of adjusting the first control valve 250, the second control valve 260, and the reversing device 140 according to the mode command is not limited.
By providing the reversing device 140, the flow path of the refrigerant can be changed, thereby changing the operation mode of the air conditioner. In the first switching state, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, one part flows into the first pipe 160, the other part flows into the third pipe 180 through the first branch pipe 112, and finally flows back into the compression mechanism 110 from the second pipe 170; in the first switching state, the air conditioner can realize refrigeration and dehumidification reheating. In the second switching state, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, one part flows into the second pipe 170, the other part flows into the third pipe 180 through the first branch pipe 112, and finally flows back into the compression mechanism 110 from the first pipe 160; in the second switching state, the air conditioner can realize heating.
The following is a description of the requirements of the different modes of operation:
the mode command includes a cooling mode command, and the step of adjusting the operation states of the first control valve 250, the second control valve 260, and the reversing device 140 according to the mode command includes:
The reversing device 140 is adjusted to a first switching state according to the cooling mode command, the first control valve 250 is opened, and the second control valve 260 is closed.
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the dehumidifying heat exchanger 210 through the first pipe 160, cools, and flows back into the compression mechanism 110 from the second pipe 170.
The mode command includes a heating mode command, and the step of adjusting the operating states of the first control valve 250, the second control valve 260, and the reversing device 140 according to the mode command includes:
according to the heating mode instruction, the reversing device 140 is adjusted to a second switching state, the first control valve 250 is opened, and the second control valve 260 is opened;
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, and a part of the refrigerant flows into the third pipe 180 through the first branch pipe 112 and flows into the reheat heat exchanger 220 to be heated; the other part flows into the dehumidifying heat exchanger 210 through the second pipe 170 to be heated, and the two last parts of the refrigerant are joined and then flow into the first pipe 160, and flow back into the compression mechanism 110 through the first pipe 160. This mode is a forced heat mode in which both the dehumidified heat exchanger 210 and the reheat heat exchanger 220 heat.
Or the reversing device 140 is adjusted to a second switching state according to the heating mode command, the first control valve 250 is opened, and the second control valve 260 is closed;
in this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the dehumidification heat exchanger 210 through the second pipe 170 to be heated, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which only the dehumidifying heat exchanger 210 heats.
Or the reversing device 140 is adjusted to a second switching state according to the heating mode command, the first control valve 250 is closed, and the second control valve 260 is opened;
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the third pipe 180 through the first branch pipe 112, flows into the reheat heat exchanger 220 to be heated, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which only the reheat heat exchanger 220 heats.
The mode command includes a dehumidifying and reheating mode command, and the step of adjusting the operating states of the first control valve 250, the second control valve 260 and the reversing device 140 according to the mode command includes:
The reversing device 140 is adjusted to a first switching state according to the cooling mode command, the first control valve 250 is opened, and the second control valve 260 is opened.
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, a part of the refrigerant flows into the first pipe 160, another part of the refrigerant flows into the third pipe 180 through the first branch pipe 112, the air which has been reheated and dehumidified in the reheat heat exchanger 220 is throttled by the reheat throttle adjusting device 240 to form a high-pressure refrigerant, the high-pressure refrigerant is merged with the refrigerant in the first pipe 160, the high-pressure refrigerant flows into the dehumidification heat exchanger 210 to evaporate the dehumidified air, and finally the high-pressure refrigerant flows into the second pipe 170 and flows back into the compression mechanism 110 through the second pipe 170. In the process, the first control valve 250 is opened, the second control valve 260 is opened, and the third control valve 270 is closed.
Further, in this embodiment, after the step of obtaining the mode instruction, the method further includes:
The operating state of the third control valve 270 is adjusted according to the mode command.
The following is a description of the requirements of the different modes of operation:
The mode command includes a cooling mode command,
The step of adjusting the working state of the reversing device 140 according to the mode command includes:
adjusting the reversing device 140 to a first switching state according to a cooling mode command;
the step of adjusting the operating states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
Opening the first control valve 250, closing the second control valve 260, and opening the third control valve 270 according to the cooling mode command;
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, is throttled by the dehumidification throttle device 230 and the reheat throttle device 240, flows into the heat exchangers connected in series, cools, and flows into the second pipe 170 after merging the last two parts of the refrigerant, and flows back into the compression mechanism 110 through the second pipe 170. This mode is a forced cool mode in which both the dehumidified heat exchanger 210 and the reheat heat exchanger 220 are cooling.
Or the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is closed according to the cooling mode command.
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, flows into the dehumidifying heat exchanger 210 to perform cooling, and finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. This mode is a normal cooling mode in which only the dehumidifying heat exchanger 210 cools.
Or the step of adjusting the operation states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
Opening the first control valve 250, closing the second control valve 260, and opening the third control valve 270 according to the cooling mode command; the opening degree of the dehumidification throttle adjusting device 230 is adjusted to zero. I.e. the dehumidification throttle adjusting device 230 is closed.
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, flows into the reheat heat exchanger 220 to perform cooling, and finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. This mode is a normal cooling mode in which only reheat heat exchanger 220 is cooling. Here, it should be emphasized that when the opening degree of the throttle adjusting device is not particularly emphasized to be zero, the throttle adjusting device (the dehumidification throttle adjusting device 230 or the reheat throttle adjusting device 240) is shown in an open state, and the opening degree of the throttle adjusting device can be adjusted according to actual needs.
Or the step of adjusting the operation states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
Opening the first control valve 250, closing the second control valve 260, and opening the third control valve 270 according to the cooling mode command; the opening degree of the reheat throttle adjusting device 240 is adjusted to zero. That is, the reheat throttle adjusting device 240 is closed.
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, sequentially passes through the first pipe 160 and the outdoor heat exchanger 150, flows into the dehumidifying heat exchanger 210 to perform cooling, and finally flows into the second pipe 170, and flows back into the compression mechanism 110 through the second pipe 170. This mode is a normal cooling mode in which only the dehumidifying heat exchanger 220 cools.
The mode instructions include a heating mode instruction,
The step of adjusting the working state of the reversing device 140 according to the mode command includes:
adjusting the reversing device 140 to a second switching state according to the heating mode command;
the step of adjusting the operating states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
the first control valve 250 is closed, the second control valve 260 is opened, and the third control valve 270 is opened according to the heating mode command;
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the third pipe 180 through the first branch pipe 112, flows into the reheat heat exchanger 220 and the dehumidification heat exchanger 210, heats the refrigerant, merges the two refrigerant components, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a forced heat mode in which both the dehumidified heat exchanger 210 and the reheat heat exchanger 220 heat.
Or the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened according to the heating mode command;
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the dehumidification heat exchanger 210 and the reheat heat exchanger 220 through the second pipe 170, and heats the two refrigerant components, and flows into the first pipe 160 after the two refrigerant components are joined, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a forced heat mode in which both the dehumidified heat exchanger 210 and the reheat heat exchanger 220 heat.
Or the first control valve 250 is opened, the second control valve 260 is opened, and the third control valve 270 is closed according to the heating mode command;
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, and a part of the refrigerant flows into the third pipe 180 through the first branch pipe 112 and flows into the reheat heat exchanger 220 to be heated; the other part flows into the dehumidifying heat exchanger 210 through the second pipe 170 to be heated, and the two last parts of the refrigerant are joined and then flow into the first pipe 160, and flow back into the compression mechanism 110 through the first pipe 160. This mode is a forced heat mode in which both the dehumidified heat exchanger 210 and the reheat heat exchanger 220 heat.
Or the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is closed according to the heating mode command;
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the dehumidification heat exchanger 210 through the second pipe 170 to be heated, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which heat is generated by the dehumidifying heat exchanger 210.
Or the first control valve 250 is closed, the second control valve 260 is opened, and the third control valve 270 is closed according to the heating mode command.
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the third pipe 180 through the first branch pipe 112, flows into the reheat heat exchanger 220 to be heated, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which only the reheat heat exchanger 220 heats.
Or the step of adjusting the operation states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
the first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened according to the heating mode command; the opening degree of the dehumidification throttle adjusting device 230 is adjusted to zero. I.e. the dehumidification throttle adjusting device 230 is closed.
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the reheat heat exchanger 220 through the second pipe 170 to be heated, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which only the reheat heat exchanger 220 heats.
Or the step of adjusting the operation states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
The first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened according to the heating mode command;
the opening degree of the reheat throttle adjusting device 240 is adjusted to zero. That is, the reheat throttle adjusting device 240 is closed.
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the dehumidification heat exchanger 210 through the second pipe 170 to be heated, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which only the dehumidifying heat exchanger 210 heats.
Or the step of adjusting the operation states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
the first control valve 250 is opened, the second control valve 260 is opened, and the third control valve 270 is closed according to the heating mode command; the opening degree of the dehumidification throttle adjusting device 230 is adjusted to zero;
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the third pipe 180 through the first branch pipe 112, flows into the reheat heat exchanger 220 to perform heating, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which only the reheat heat exchanger 220 heats.
Or the step of adjusting the operation states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
the first control valve 250 is opened, the second control valve 260 is opened, and the third control valve 270 is closed according to the heating mode command; the opening degree of the reheat throttle adjusting device 240 is adjusted to zero.
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, flows into the dehumidification heat exchanger 210 through the second pipe 170 to be heated, flows into the first pipe 160, and flows back into the compression mechanism 110 through the first pipe 160. This mode is a normal heating mode in which only the dehumidifying heat exchanger 210 heats.
The mode command includes a dehumidify reheat mode command,
The step of adjusting the working state of the reversing device 140 according to the mode command includes:
adjusting the reversing device 140 to a first switching state according to a dehumidifying and reheating mode instruction;
the step of adjusting the operating states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
the first control valve 250 is opened, the second control valve 260 is opened, and the third control valve 270 is closed according to the dehumidification reheat mode command.
In this mode, the high-temperature and high-pressure refrigerant is discharged from the discharge pipe 111, a part of the refrigerant flows into the first pipe 160, another part of the refrigerant flows into the third pipe 180 through the first branch pipe 112, the air which has been reheated and dehumidified in the reheat heat exchanger 220 is throttled by the reheat throttle adjusting device 240 to form a high-pressure refrigerant, the high-pressure refrigerant is merged with the refrigerant in the first pipe 160, the high-pressure refrigerant flows into the dehumidification heat exchanger 210 to evaporate the dehumidified air, and finally the high-pressure refrigerant flows into the second pipe 170 and flows back into the compression mechanism 110 through the second pipe 170.
In addition, when the user needs to defrost the outdoor heat exchanger 150, there are two cases, one is the normal strong defrosting, in this mode, both the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 are used for cooling, and the outdoor heat exchanger 150 is used for heating; the other is non-defrosting, in this mode, the dehumidifying heat exchanger 210 cools, the reheating heat exchanger 220 heats, and the outdoor heat exchanger 150 heats.
The mode command further includes a defrosting mode command, and the working state of the reversing device 140 is adjusted according to the mode command; the step of adjusting the operating states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
adjusting the reversing device 140 to a first switching state according to a defrosting mode instruction;
the first control valve 250 is opened, the second control valve 260 is opened, and the third control valve 270 is closed according to the defrosting mode command.
By setting both the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 to be refrigerating, the outdoor heat exchanger 150 is strongly heated, so that the outdoor heat exchanger 150 can be rapidly defrosted.
Non-sensitive defrosting, wherein the mode command further comprises a defrosting mode command, and the working state of the reversing device 140 is adjusted according to the mode command; the step of adjusting the operating states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
The first control valve 250 is opened, the second control valve 260 is closed, and the third control valve 270 is opened according to the defrosting mode command.
The dehumidification heat exchanger 210 cools, and the reheat heat exchanger 220 and the outdoor heat exchanger 150 heat, so that the outdoor unit is defrosted without being perceived by a user.
A control method of an air conditioner provided with a plurality of indoor units 200 is described below.
The air conditioner includes a plurality of indoor units 200, for example, two, three or more, etc., and each indoor unit 200 may include different heat exchanger forms, for example, may include one or more of an indoor unit having a constant temperature dehumidification function (having both a dehumidification heat exchanger 210 and a reheat heat exchanger 220, an ordinary cooling/heating indoor unit (having only one heat exchanger and a corresponding throttle adjusting device), and an indoor unit having a freely switchable cooling or heating state of a reversing device 140, so that the air conditioner may perform a mixed operation of cooling, heating, dehumidifying reheat, etc.
Specifically, the air conditioner further includes a first connection pipe 310 (shown in fig. 1) branched from a fourth crossing point 311 of the first pipe 160, a second connection pipe 320 (shown in fig. 2) branched from the second pipe 170, and a third connection pipe 330 (shown in fig. 3) branched from the third pipe 180, the fourth crossing point 311 being located between the dehumidification throttle control device 230 and the outdoor heat exchanger 150; the air conditioner further includes a plurality of indoor units 200, and a plurality of the indoor units 200 are connected in parallel to the first, second and third connection pipes 310, 320 and 330.
The plurality of indoor units can be all refrigeration, all dehumidification and reheating, or part of indoor units are refrigeration, and the other part of indoor units are dehumidification and reheating.
For example, in some embodiments, the air conditioner includes a first indoor unit and a second indoor unit. The acquisition mode instruction; the step of adjusting the operating states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
Acquiring a first mode instruction of a first indoor unit and acquiring a second mode instruction of a second indoor unit;
The operating states of the first, second and third control valves 250, 260 and 270 of the first indoor unit are adjusted according to the first mode command, and the operating states of the first, second and third control valves 250, 260 and 270 of the second indoor unit are adjusted according to the second mode command.
The first mode command and the second mode command may include cooling, heating, dehumidifying and reheating, defrosting and non-defrosting, user demand, and the like. The method for acquiring the first mode instruction and the second mode instruction is various, and can acquire the instructions sent by the external terminal, such as a mobile phone, a remote controller and the like; can also be obtained from other household appliances, such as electric fans, air purifiers, etc.; the method can also be obtained by detecting the operation parameters of the method or detecting external environment parameters such as indoor temperature; of course, it may also be acquired from the cloud.
The following is a description of the requirements of different combinations of modes of operation:
the first mode command includes a cooling mode command, the second mode command includes a dehumidifying and reheating mode command, and the adjusting the operating states of the first control valve 250, the second control valve 260, and the third control valve 270 of the first indoor unit according to the first mode command, and the adjusting the operating states of the first control valve 250, the second control valve 260, and the third control valve 270 of the second indoor unit according to the second mode command includes:
Opening the first control valve 250 of the first indoor unit, closing the second control valve 260 of the first indoor unit, and opening the third control valve 270 of the first indoor unit according to the cooling mode command; the first control valve 250 of the second indoor unit is opened, the second control valve 260 of the second indoor unit is opened, and the third control valve 270 of the second indoor unit is closed according to the dehumidifying and reheating mode command.
In this embodiment, the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 of the first indoor unit both perform refrigeration, and after the air passes through the dehumidifying heat exchanger 210 and the reheating heat exchanger 220, the refrigeration can be implemented; the dehumidifying heat exchanger 210 of the second indoor unit cools, and the reheating heat exchanger 220 of the second indoor unit heats, so that the air exchanges heat with the dehumidifying heat exchanger 210 and then exchanges heat with the reheating heat exchanger 220, and dehumidification reheating can be achieved.
The first mode command includes a heating mode command, the second mode command includes a dehumidifying and reheating mode command, the step of adjusting the operating states of the first control valve 250 and the second control valve 260 of the first indoor unit according to the first mode command, and the step of adjusting the operating states of the first control valve 250 and the second control valve 260 of the second indoor unit according to the second mode command includes:
closing the first control valve 250 of the first indoor unit, opening the second control valve 260 of the first indoor unit, and opening the third control valve 270 of the first indoor unit according to the heating mode command; the first control valve 250 of the second indoor unit is opened, the second control valve 260 of the second indoor unit is opened, and the third control valve 270 of the second indoor unit is closed according to the dehumidifying and reheating mode command.
In this embodiment, the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 of the first indoor unit both heat, and after the air passes through the dehumidifying heat exchanger 210 and the reheating heat exchanger 220, heating can be achieved; the dehumidifying heat exchanger 210 of the second indoor unit cools, and the reheating heat exchanger 220 of the second indoor unit heats, so that the air exchanges heat with the dehumidifying heat exchanger 210 and then exchanges heat with the reheating heat exchanger 220, and dehumidification reheating can be achieved.
The first mode command includes a heating mode command, the second mode command includes a cooling mode command, the step of adjusting the operating states of the first control valve 250 and the second control valve 260 of the first indoor unit according to the first mode command, and the step of adjusting the operating states of the first control valve 250 and the second control valve 260 of the second indoor unit according to the second mode command includes:
closing the first control valve 250 of the first indoor unit, opening the second control valve 260 of the first indoor unit, and opening the third control valve 270 of the first indoor unit according to the heating mode command; the first control valve 250 of the second indoor unit is opened, the second control valve 260 of the second indoor unit is closed, and the third control valve 270 of the second indoor unit is opened according to the cooling mode command.
In this embodiment, the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 of the first indoor unit both heat, and after the air passes through the dehumidifying heat exchanger 210 and the reheating heat exchanger 220, heating can be achieved; the dehumidifying heat exchanger 210 and the reheating heat exchanger 220 of the second indoor unit are both cooled, and the air can be cooled after passing through the dehumidifying heat exchanger 210 and the reheating heat exchanger 220.
Of course, the first mode command may include a first heating mode command, the second mode command may include a second heating mode command, the step of adjusting the operating states of the first control valve 250 and the second control valve 260 of the first indoor unit according to the first mode command, and the step of adjusting the operating states of the first control valve 250 and the second control valve 260 of the second indoor unit according to the second mode command may include:
closing the first control valve 250 of the first indoor unit, opening the second control valve 260, and opening the third control valve 270 according to the first heating mode command; the first control valve 250 of the second indoor unit is opened, the second control valve 260 is opened, and the third control valve 270 is closed according to the second heating mode command.
In this embodiment, the reversing device 140 needs to be adjusted to the second switching state.
It is worth mentioning that the air conditioner can also realize the combination of three modes of refrigeration, heating and dehumidification reheat. For example, the air conditioner includes a first indoor unit, a second indoor unit, and a third indoor unit, the acquisition mode instruction; the step of adjusting the operating states of the first control valve 250, the second control valve 260, and the third control valve 270 according to the mode command includes:
Acquiring a first mode instruction of a first indoor unit, acquiring a second mode instruction of a second indoor unit and acquiring a third mode instruction of a third indoor unit;
The operating states of the first control valve 250, the second control valve 260, and the third control valve 260 of the first indoor unit are adjusted according to the first mode command, the operating states of the first control valve 250, the second control valve 260, and the third control valve 270 of the second indoor unit are adjusted according to the second mode command, and the operating states of the first control valve 250, the second control valve 260, and the third control valve 270 of the third indoor unit are adjusted according to the third mode command;
the first mode instruction comprises a refrigeration mode instruction, the second mode instruction comprises a heating mode instruction, and the third mode instruction comprises a dehumidifying and reheating mode instruction.
Specifically, the first control valve 250 of the first indoor unit is opened, the second control valve 260 is closed, and the third control valve 270 is opened according to the first mode command (as shown in fig. 3); closing the first control valve 250 of the second indoor unit, opening the second control valve 260, and opening the third control valve 270 according to the second mode command (as shown in fig. 4); the first control valve 250 of the third indoor unit is opened, the second control valve 260 is opened, and the third control valve 270 is closed according to the third mode command (as shown in fig. 5). In this embodiment, the refrigerant flowing out of the second indoor unit for heating must flow into the first indoor unit for cooling or the third indoor unit for dehumidification and reheating for heat exchange, and then flow back into the second pipe 170 and flow back into the compression mechanism 110 through the second pipe 170.
Therefore, the air conditioner can realize the mixing of multiple modes of refrigeration, heating, dehumidification and reheating, thereby further increasing the functions of the air conditioner, improving the adaptability of the air conditioner and better meeting the demands of users.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (25)
1. An air conditioner is characterized by comprising an outdoor unit and an indoor unit, wherein the outdoor unit comprises a compression mechanism, an outdoor heat exchanger and an outdoor throttling regulator, and the indoor unit comprises a dehumidifying heat exchanger, a dehumidifying throttling regulator and a first control valve;
The air conditioner further includes: a discharge pipe connected to a discharge side of the compression mechanism, a low pressure suction pipe connected to a low pressure suction side of the compression mechanism, a first pipe sequentially connected to the discharge pipe, the outdoor heat exchanger, the outdoor throttle control device, the dehumidification heat exchanger, and a second pipe sequentially connected to the dehumidification heat exchanger, the first control valve, and the low pressure suction pipe, thereby forming a dehumidification circuit;
The indoor unit further comprises a reheating heat exchanger, a reheating throttling adjusting device, a second control valve and a thermal circulation device for feeding heat or cold of the indoor unit into a room;
The air conditioner further includes a third pipe and a first branch pipe branching from the discharge pipe, the third pipe connecting a first intersection of the first pipe, the reheat throttle adjusting device, the reheat heat exchanger, the second control valve, and the first branch pipe in this order to constitute a reheat circuit, wherein the first intersection is located between the dehumidification throttle adjusting device and the outdoor throttle adjusting device;
The indoor unit further comprises a third control valve and a second bifurcation pipe, wherein the second bifurcation pipe is sequentially connected with a second intersection point of the second piping, the third control valve and a third intersection point of the third piping, the second intersection point is positioned between the dehumidification heat exchanger and the first control valve, and the third intersection point is positioned between the reheating heat exchanger and the second control valve; the third control valve is an electromagnetic valve or an electric valve.
2. The air conditioner as set forth in claim 1, wherein said indoor unit further includes a fourth control valve and a third branch pipe branching from said second pipe, said third branch pipe connecting a third intersection of said fourth control valve and said third pipe.
3. The air conditioner according to claim 1 or2, wherein the outdoor unit further comprises a reversing device having a first switching state and a second switching state,
In the first switching state, the reversing device communicates the discharge pipe with the first pipe and communicates the low-pressure suction pipe with the second pipe;
In the second switching state, the reversing device communicates the discharge pipe with the second pipe, and communicates the low-pressure suction pipe with the first pipe.
4. The air conditioner of claim 1, wherein the dehumidification throttle adjustment device comprises a dehumidification throttle valve and the reheat throttle adjustment device comprises a reheat throttle valve.
5. The air conditioner of claim 1, wherein the first control valve and the second control valve are solenoid valves or electric valves.
6. The air conditioner according to claim 1, wherein the heat circulation device is an air supply device, and the dehumidifying heat exchanger and the reheating heat exchanger are disposed in an airflow path formed by the air supply device.
7. The air conditioner according to claim 1, further comprising a first connecting pipe branched from a fourth crossing point of the first piping, a second connecting pipe branched from the second piping, and a third connecting pipe branched from the third piping, the fourth crossing point being located between the dehumidification throttle adjusting device and the outdoor heat exchanger;
the air conditioner further comprises a plurality of indoor units, and the indoor units are connected to the first connecting pipe, the second connecting pipe and the third connecting pipe in parallel.
8. The air conditioner of claim 1, further comprising a heat exchange water tank and a floor heating water flow pipe in communication with the heat exchange water tank;
The heat exchange water tank is internally provided with a floor heating heat exchanger, a refrigerant inlet of the floor heating heat exchanger is communicated with a third pipe, a refrigerant outlet of the floor heating heat exchanger is communicated with a first pipe, and a fifth control valve is arranged on the second pipe.
9. The air conditioner as set forth in claim 1, wherein said indoor unit further includes electric auxiliary heat, said electric auxiliary heat being located between said dehumidifying heat exchanger and said reheating heat exchanger;
Or the electric auxiliary heat is positioned at one side of the dehumidification heat exchanger far away from the reheating heat exchanger;
or the electric auxiliary heat is positioned at one side of the reheating heat exchanger far away from the dehumidifying heat exchanger.
10. The control method of the air conditioner is characterized in that the air conditioner comprises an outdoor unit and an indoor unit, the outdoor unit comprises a compression mechanism, an outdoor heat exchanger and an outdoor throttling adjusting device, and the indoor unit comprises a dehumidifying heat exchanger, a dehumidifying throttling adjusting device and a first control valve;
The air conditioner further includes: a discharge pipe connected to a discharge side of the compression mechanism, a low pressure suction pipe connected to a low pressure suction side of the compression mechanism, a first pipe sequentially connected to the discharge pipe, the outdoor heat exchanger, the outdoor throttle control device, the dehumidification heat exchanger, and a second pipe sequentially connected to the dehumidification heat exchanger, the first control valve, and the low pressure suction pipe, thereby forming a dehumidification circuit;
The indoor unit further comprises a reheating heat exchanger, a reheating throttling adjusting device, a second control valve and a thermal circulation device for feeding heat or cold of the indoor unit into a room;
The air conditioner further includes a third pipe and a first branch pipe branching from the discharge pipe, the third pipe connecting a first intersection of the first pipe, the reheat throttle adjusting device, the reheat heat exchanger, the second control valve, and the first branch pipe in this order to constitute a reheat circuit, wherein the first intersection is located between the dehumidification throttle adjusting device and the outdoor throttle adjusting device;
the control method of the air conditioner comprises the following steps:
Acquiring a mode instruction;
adjusting the working states of the first control valve and the second control valve according to the mode instruction;
The indoor unit further comprises a third control valve and a second bifurcation pipe, wherein the second bifurcation pipe is sequentially connected with a second intersection point of the second piping, the third control valve and a third intersection point of the third piping, the second intersection point is positioned between the dehumidification heat exchanger and the first control valve, and the third intersection point is positioned between the reheating heat exchanger and the second control valve;
after the step of fetching the mode instruction, further comprising:
And adjusting the working state of the third control valve according to the mode command.
11. The method of controlling an air conditioner as claimed in claim 10, wherein the mode command includes a cooling mode command, and the adjusting of the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
and opening the first control valve, closing the second control valve and opening the third control valve according to the refrigerating mode command.
12. The method of controlling an air conditioner as set forth in claim 10, wherein the mode command includes a dehumidifying and reheating mode command, and the step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
And opening the first control valve, opening the second control valve and closing the third control valve according to the dehumidification reheating mode command.
13. The method of controlling an air conditioner according to claim 10, wherein the outdoor unit further comprises a reversing device having a first switching state and a second switching state,
In the first switching state, the reversing device communicates the discharge pipe with the first pipe and communicates the low-pressure suction pipe with the second pipe;
In the second switching state, the reversing device communicates the discharge pipe with the second pipe, and communicates the low-pressure suction pipe with the first pipe;
after the step of fetching the mode instruction, further comprising:
And adjusting the working state of the reversing device according to the mode instruction.
14. The method for controlling an air conditioner as claimed in claim 13, wherein the mode command includes a cooling mode command,
The step of adjusting the working state of the reversing device according to the mode instruction comprises the following steps:
the reversing device is adjusted to a first switching state according to a refrigerating mode instruction;
The step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
Opening the first control valve according to the refrigerating mode instruction, closing the second control valve, and opening the third control valve;
Or opening the first control valve, closing the second control valve and closing the third control valve according to the refrigerating mode command.
15. The method for controlling an air conditioner as claimed in claim 13, wherein the mode command includes a cooling mode command,
The step of adjusting the working state of the reversing device according to the mode instruction comprises the following steps:
the reversing device is adjusted to a first switching state according to a refrigerating mode instruction;
The step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
Opening the first control valve according to the refrigerating mode instruction, closing the second control valve, and opening the third control valve;
And adjusting the opening degree of the dehumidification throttling adjusting device to be zero.
16. The method for controlling an air conditioner according to claim 13, wherein the mode command includes a heating mode command,
The step of adjusting the working state of the reversing device according to the mode instruction comprises the following steps:
Adjusting the reversing device to a second switching state according to a heating mode instruction;
The step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
Closing the first control valve, opening the second control valve and opening the third control valve according to the heating mode instruction;
or opening the first control valve according to the heating mode command, closing the second control valve and opening the third control valve;
or opening the first control valve, opening the second control valve and closing the third control valve according to the heating mode instruction;
or opening the first control valve according to the heating mode command, closing the second control valve, and closing the third control valve;
or closing the first control valve, opening the second control valve and closing the third control valve according to the heating mode command.
17. The method for controlling an air conditioner according to claim 13, wherein the mode command includes a heating mode command,
The step of adjusting the working state of the reversing device according to the mode instruction comprises the following steps:
Adjusting the reversing device to a second switching state according to a heating mode instruction;
The step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
Opening the first control valve, closing the second control valve and opening the third control valve according to the heating mode instruction;
the opening degree of the dehumidification throttling adjusting device is adjusted to be zero;
or the opening degree of the reheat throttle adjusting device is adjusted to zero.
18. The method for controlling an air conditioner according to claim 13, wherein the mode command includes a heating mode command,
The step of adjusting the working state of the reversing device according to the mode instruction comprises the following steps:
Adjusting the reversing device to a second switching state according to a heating mode instruction;
The step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
opening the first control valve, opening the second control valve and closing the third control valve according to the heating mode instruction;
the opening degree of the dehumidification throttling adjusting device is adjusted to be zero;
or the opening degree of the reheat throttle adjusting device is adjusted to zero.
19. The method for controlling an air conditioner according to claim 13, wherein the mode command includes a dehumidifying and reheating mode command,
The step of adjusting the working state of the reversing device according to the mode instruction comprises the following steps:
Adjusting the reversing device to a first switching state according to a dehumidifying and reheating mode instruction;
The step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
And opening the first control valve, opening the second control valve and closing the third control valve according to the dehumidification reheating mode command.
20. The control method of an air conditioner as set forth in claim 13, wherein the mode command includes a defrost mode command, the operating state of the reversing device being adjusted according to the mode command; the step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
adjusting the reversing device to a first switching state according to a defrosting mode instruction;
opening the first control valve according to the defrosting mode command, opening the second control valve, and closing the third control valve;
Or opening the first control valve, closing the second control valve and opening the third control valve according to the defrosting mode command.
21. The control method of an air conditioner according to claim 10, wherein the air conditioner includes a first indoor unit and a second indoor unit, the acquisition mode instruction; the step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
Acquiring a first mode instruction of a first indoor unit and acquiring a second mode instruction of a second indoor unit;
And adjusting the working states of the first control valve, the second control valve and the third control valve of the first indoor unit according to the first mode instruction, and adjusting the working states of the first control valve, the second control valve and the third control valve of the second indoor unit according to the second mode instruction.
22. The method for controlling an air conditioner as claimed in claim 21, wherein the first mode command includes a cooling mode command, the second mode command includes a dehumidifying and reheating mode command,
The step of adjusting the working states of the first control valve, the second control valve and the third control valve of the first indoor unit according to the first mode instruction, and the step of adjusting the working states of the first control valve, the second control valve and the third control valve of the second indoor unit according to the second mode instruction comprises the following steps:
Opening a first control valve of the first indoor unit according to the refrigerating mode instruction, closing a second control valve of the first indoor unit, and opening a third control valve of the first indoor unit; and opening the first control valve of the second indoor unit, opening the second control valve of the second indoor unit and closing the third control valve of the second indoor unit according to the dehumidifying and reheating mode instruction.
23. The method for controlling an air conditioner as claimed in claim 21, wherein the first mode command includes a heating mode command, the second mode command includes a dehumidifying and reheating mode command,
The step of adjusting the working states of the first control valve and the second control valve of the first indoor unit according to the first mode instruction and the working states of the first control valve and the second control valve of the second indoor unit according to the second mode instruction includes:
Closing a first control valve of the first indoor unit, opening a second control valve of the first indoor unit and opening a third control valve of the first indoor unit according to a heating mode instruction; and opening the first control valve of the second indoor unit, opening the second control valve of the second indoor unit and closing the third control valve of the second indoor unit according to the dehumidifying and reheating mode instruction.
24. The method for controlling an air conditioner as claimed in claim 21, wherein the first mode command includes a heating mode command, the second mode command includes a cooling mode command,
The step of adjusting the working states of the first control valve and the second control valve of the first indoor unit according to the first mode instruction and the working states of the first control valve and the second control valve of the second indoor unit according to the second mode instruction includes:
Closing a first control valve of the first indoor unit, opening a second control valve of the first indoor unit and opening a third control valve of the first indoor unit according to a heating mode instruction; and opening the first control valve of the second indoor unit, closing the second control valve of the second indoor unit and opening the third control valve of the second indoor unit according to the refrigerating mode command.
25. The control method of an air conditioner according to claim 10, wherein the air conditioner includes a first indoor unit, a second indoor unit, and a third indoor unit, the acquisition mode instruction; the step of adjusting the operating states of the first control valve, the second control valve, and the third control valve according to the mode command includes:
Acquiring a first mode instruction of a first indoor unit, acquiring a second mode instruction of a second indoor unit and acquiring a third mode instruction of a third indoor unit;
Adjusting working states of a first control valve, a second control valve and a third control valve of the first indoor unit according to the first mode instruction, adjusting working states of the first control valve, the second control valve and the third control valve of the second indoor unit according to the second mode instruction, and adjusting working states of the first control valve, the second control valve and the third control valve of the third indoor unit according to the third mode instruction;
the first mode instruction comprises a refrigeration mode instruction, the second mode instruction comprises a heating mode instruction, and the third mode instruction comprises a dehumidifying and reheating mode instruction.
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| CN112797657B (en) * | 2019-10-28 | 2024-06-21 | 广东美的制冷设备有限公司 | Air conditioner and control method thereof |
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