CN111442347A - Air conditioner and refrigerating and heating control method thereof - Google Patents
Air conditioner and refrigerating and heating control method thereof Download PDFInfo
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- CN111442347A CN111442347A CN202010189227.0A CN202010189227A CN111442347A CN 111442347 A CN111442347 A CN 111442347A CN 202010189227 A CN202010189227 A CN 202010189227A CN 111442347 A CN111442347 A CN 111442347A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005057 refrigeration Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims description 22
- 239000003507 refrigerant Substances 0.000 abstract description 68
- 238000009434 installation Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 238000010257 thawing Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000006467 substitution reaction Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004899 c-terminal region Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- 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
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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- 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
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- 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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
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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
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of household appliances, in particular to an air conditioner and a refrigeration and heating control method thereof, which comprises a reversing assembly, a control assembly and a control module, wherein the reversing assembly comprises a D end, a C end, an E end and an S end; the compressor comprises an air outlet end and an air suction end, wherein the air outlet end is connected with the D end, and the air suction end is connected with the S end; the condenser comprises a first end and a second end, and the first end is connected with the C end; the inlet of the first indoor equipment is connected with the second end through a first expansion valve, and the outlet of the first indoor equipment is connected with the E end through a first electromagnetic valve; the inlet of the second indoor equipment is connected with the second end through a second expansion valve, and the outlet of the second indoor equipment is connected with the E end through a second electromagnetic valve; the invention realizes that the first indoor equipment and the second indoor equipment can both enter a refrigerating or heating mode and do not need to use a plurality of refrigerants to be respectively used in different systems, simplifies the structure of the system, reduces the installation cost of the system, avoids the heat loss caused by secondary heat exchange among the plurality of refrigerants and improves the energy conversion efficiency.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to an air conditioner and a refrigeration and heating control method thereof.
Background
Along with improvement and special occasion needs that people required room travelling comfort, will refrigerate and heat the terminal demand of separating and using more and more, prior art adopts air source heat pump system for giving consideration to fan coil refrigeration, floor radiation and heating and user's independent installation problem, this system adopts two kinds of refrigerant secondary heat transfer, freon system and water system promptly. The Freon system comprises a compressor, a four-way valve, a condenser, a throttling element, a plate exchanger and the like, and the water system comprises a water pump, an expansion water tank, a fan coil, a water capillary tube, a water collecting and distributing device, various valves and the like. Freon and water exchange through the board and carry out the secondary heat transfer, exchange the freon refrigerant from outdoor environment side absorptive heat through the board and carry out the heat transfer with water, transfer the heat to the indoor side. The cooling and the radiant heating of the floor at the side of the water capillary tube are realized at the tail end of the fan coil. This scheme adopts secondary heat transfer system, has many drawbacks, if:
a. the energy-saving performance is poor, and the heat loss and the low efficiency exist when the plates are changed because the freon and the water carry out secondary heat exchange when the plates are changed.
b. The installation cost is high, and the whole system needs two refrigerant media, a plurality of components such as a plate exchanger, a water pump, an expansion water tank, a water collecting and distributing device and the like.
c. Later maintenance is difficult, the cost is high, and the water system needs to be maintained regularly due to the problems of scaling, icing, pipeline corrosion and easy leakage of the system.
d. The service life is low, the water capillary tube is completely made of plastic parts and is easily blocked by iron rust in the pipeline, scale is formed on the inner surface, the heat exchange efficiency is reduced, and the service cycle is limited.
Disclosure of Invention
The invention aims to provide an air conditioner and a refrigeration and heating control method thereof, which are beneficial to improving the energy conversion efficiency, meet the requirement of separate use of a refrigeration and heating tail end and prolong the service life.
In order to achieve the above object, the present invention discloses an air conditioner, comprising:
the reversing assembly comprises a D end, a C end, an E end and an S end;
the compressor comprises an air outlet end and an air suction end, the air outlet end is connected with the D end, and the air suction end is connected with the S end;
a condenser comprising a first end and a second end, the first end being connected to the C-end;
a first indoor unit having an inlet connected to the second end through a first expansion valve and an outlet connected to the end E through a first solenoid valve;
and the inlet of the second indoor equipment is connected with the second end through a second expansion valve, and the outlet of the second indoor equipment is connected with the E end through a second electromagnetic valve.
Optionally, an outlet of the first indoor unit is connected to a first sub-path, the first sub-path is connected to the air suction end through a third electromagnetic valve, an outlet of the second indoor unit is connected to a second sub-path, and the second sub-path is connected to the air suction end through a fourth electromagnetic valve.
Optionally, an outlet of the first indoor device is connected to the first solenoid valve via a first air valve, and an outlet of the first expansion valve is connected to an inlet of the first indoor device via a first liquid valve.
Optionally, an outlet of the second indoor device is connected to the second solenoid valve via a second air valve, and an outlet of the second expansion valve is connected to an inlet of the second indoor device via a second liquid valve.
Optionally, the reversing assembly is a four-way valve.
Optionally, the first indoor device is an air supply indoor unit, and the second indoor device is a geothermal indoor unit.
Another aspect of the disclosure is a refrigeration control method of an air conditioner, including the air conditioner, the method includes:
when the first indoor equipment enters a refrigeration mode, the end D is communicated with the end C, the end E is communicated with the end S, the compressor is started, the first expansion valve is opened to a preset opening degree, the second expansion valve is closed, and the first electromagnetic valve and the second electromagnetic valve are opened;
when the second indoor equipment enters a refrigeration mode, the end D is communicated with the end C, the end E is communicated with the end S, the compressor is started, the second expansion valve is opened to a preset opening degree, the first expansion valve is closed, and the first electromagnetic valve and the second electromagnetic valve are opened.
Optionally, an outlet of the first indoor device is connected to a first secondary path, the first secondary path is connected to the air suction end through a third electromagnetic valve, an outlet of the second indoor device is connected to a second secondary path, and the second secondary path is connected to the air suction end through a fourth electromagnetic valve;
when the first indoor equipment or the second indoor equipment enters a refrigeration mode, the third electromagnetic valve and the fourth electromagnetic valve are both opened.
Another aspect of the disclosure is a heating control method of an air conditioner, including the air conditioner, the method includes:
when the first indoor equipment enters a heating mode, the end D is communicated with the end E, the end C is communicated with the end S, the compressor is started, the first expansion valve is opened to a preset opening degree, the second electromagnetic valve and the second expansion valve are closed, and the first electromagnetic valve is opened;
and when the second indoor equipment enters a heating mode, the end D is communicated with the end E, the end C is communicated with the end S, the compressor is started, the second expansion valve is opened to a preset opening degree, the first electromagnetic valve and the first expansion valve are closed, and the second electromagnetic valve is opened.
Optionally, an outlet of the first indoor device is connected to a first secondary path, the first secondary path is connected to the air suction end through a third electromagnetic valve, an outlet of the second indoor device is connected to a second secondary path, and the second secondary path is connected to the air suction end through a fourth electromagnetic valve;
when the first indoor equipment enters a heating mode, closing the third electromagnetic valve and opening the fourth electromagnetic valve;
and when the second indoor equipment enters a heating mode, closing the fourth electromagnetic valve and opening the third electromagnetic valve.
The embodiment of the invention has the following technical effects:
the invention forms two sets of throttling systems for respectively controlling the first indoor equipment and the second indoor equipment to enter a refrigeration or heating mode through the switching of the first expansion valve, the first electromagnetic valve, the second expansion valve and the second electromagnetic valve, the two sets of throttling systems are mutually independent, and the refrigerant circulates in the two sets of throttling systems through a set of compressor and condenser, so that the first indoor equipment and the second indoor equipment can both enter the refrigeration or heating mode, the twin system with the same function of the first indoor equipment and the second indoor equipment is realized, the first indoor equipment and the second indoor equipment can both form a set of complete air conditioning system with outdoor equipment, and a plurality of refrigerants are not required to be respectively used in different systems, the structure of the system is simplified, the installation cost of the system is reduced, and the heat loss caused by secondary heat exchange among the plurality of refrigerants is avoided, the energy conversion efficiency is improved; and the single refrigerant, such as Freon, is selected, the problems of scaling, icing, pipeline corrosion and the like caused by a water system are avoided, and the service life of the system is prolonged;
in addition, in the refrigeration mode of the first indoor equipment, the first expansion valve is opened, the second expansion valve is closed, and the first electromagnetic valve and the second electromagnetic valve are both opened, so that the pipeline of the second indoor equipment is in a low-pressure vacuum-pumping state, the refrigerant is prevented from being accumulated in the pipeline of the second indoor equipment, the refrigerant is circulated in a throttling system formed by the first indoor equipment as much as possible, and the balance of the refrigerant and the normal operation of the system are kept; similarly, in the cooling mode of the second indoor unit, the first expansion valve is closed, the second expansion valve is opened, and both the first electromagnetic valve and the second electromagnetic valve are opened, so that the refrigerant circulates in the throttling system formed by the second indoor unit as much as possible.
Drawings
FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;
fig. 2 is a state operation diagram of a cooling mode of a first indoor unit according to a preferred embodiment of the present invention;
fig. 3 is a state operation diagram of a cooling mode of a second indoor unit according to the preferred embodiment of the present invention;
fig. 4 is a state operation diagram of a heating mode of a first indoor unit according to a preferred embodiment of the present invention;
fig. 5 is a state operation diagram of a heating mode of the second indoor unit according to the preferred embodiment of the present invention.
Description of reference numerals:
101. the air conditioner comprises a compressor, 102, a reversing assembly, 103, a condenser, 104, first indoor equipment, 105, second indoor equipment, 106, a first expansion valve, 107, a second expansion valve, 108, a first electromagnetic valve, 109, a second electromagnetic valve, 110, a third electromagnetic valve, 111, a fourth electromagnetic valve, 112, a first air valve, 113, a second air valve, 114, a first liquid valve, 115 and a second liquid valve.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1, the present invention discloses an air conditioner including:
a commutation component 102, which comprises a D terminal, a C terminal, an E terminal and an S terminal;
the compressor 101 comprises an air outlet end and an air suction end, wherein the air outlet end is connected with the D end, and the air suction end is connected with the S end;
a condenser 103 including a first end and a second end, the first end being connected to the C end;
a first indoor unit 104 having an inlet connected to a second end via a first expansion valve 106 and an outlet connected to an E end via a first solenoid valve 108;
the second indoor unit 105 has an inlet connected to the second end through a second expansion valve 107, and an outlet connected to the E end through a second solenoid valve 109.
The invention forms two sets of throttling systems for respectively controlling the first indoor equipment 104 and the second indoor equipment 105 to enter a refrigerating or heating mode through the switching of the first expansion valve 106, the first electromagnetic valve 108, the second expansion valve 107 and the second electromagnetic valve 109, the two sets of throttling systems are mutually independent, and the refrigerant circulates in the two sets of throttling systems through the group of compressor 101 and the condenser 103, so that the first indoor equipment 104 and the second indoor equipment 105 can both enter the refrigerating or heating mode, the twin system with the same function of the first indoor equipment 104 and the second indoor equipment 105 is realized, the first indoor equipment 104 and the second indoor equipment 105 can both form a set of complete air conditioning system with outdoor equipment, and a plurality of refrigerants are not required to be respectively used in different systems, the structure of the system is simplified, the installation cost of the system is reduced, and the heat loss caused by secondary heat exchange among the plurality of refrigerants is avoided, the energy conversion efficiency is improved;
in addition, in the cooling mode of the first indoor unit 104, the first expansion valve 106 is opened, the second expansion valve 107 is closed, and both the first solenoid valve 108 and the second solenoid valve 109 are opened, so that the pipeline of the second indoor unit 105 is in a low-pressure vacuum state, refrigerant accumulation in the pipeline of the second indoor unit 105 is avoided, refrigerant circulates in the throttling system formed by the first indoor unit 104 as much as possible, and refrigerant balance and normal operation of the system are maintained; similarly, in the cooling mode of the second indoor unit 105, the first expansion valve 106 is closed, the second expansion valve 107 is opened, and the first solenoid valve 108 and the second solenoid valve 109 are both opened, so that the refrigerant circulates through the throttle system formed by the second indoor unit 105 as much as possible.
The reversing component 102 in this embodiment is a four-way valve, and realizes circulation of refrigerant among the compressor 101, the condenser 103, the first indoor unit 104, and the second indoor unit 105.
Further, in order to ensure the smooth operation of the system in the heating mode of the first indoor device 104 or the second indoor device 105, an outlet of the first indoor device 104 of this embodiment is connected to a first sub-path, the first sub-path is connected to the air suction end through the third electromagnetic valve 110, an outlet of the second indoor device 105 is connected to a second sub-path, and the second sub-path is connected to the air suction end through the fourth electromagnetic valve 111.
Based on the air conditioner, the invention discloses a refrigeration control method of the air conditioner, which comprises the following steps:
when the first indoor unit 104 enters the cooling mode, the end D is communicated with the end C, and the end E is communicated with the end S, the compressor 101 is started, the first expansion valve 106 is opened to a preset opening degree, the second expansion valve 107 is closed, and the first solenoid valve 108 and the second solenoid valve 109 are opened;
when the second indoor unit 105 enters the cooling mode, the end D is communicated with the end C, and the end E is communicated with the end S, the compressor 101 is started, the second expansion valve 107 is opened to a preset opening degree, the first expansion valve 106 is closed, and the first solenoid valve 108 and the second solenoid valve 109 are opened;
when the first indoor unit 104 or the second indoor unit 105 enters the cooling mode, both the third electromagnetic valve 110 and the fourth electromagnetic valve 111 are opened;
at this time, referring to fig. 2, in the refrigeration process of the first indoor unit 104, the high-pressure gaseous refrigerant discharged from the compressor 101 enters the condenser 103 through the four-way valve D-C to be liquefied and condensed into high-pressure liquid, and the high-pressure liquid refrigerant is throttled by opening a preset opening degree through the first expansion valve 106, wherein a part of the refrigerant flows through the suction end of the compressor 101 through the first electromagnetic valve 108 and the four-way valve E-S, and a part of the refrigerant directly enters the suction end of the compressor 101 through the third electromagnetic valve 110 to form refrigerant circulation, and the second indoor unit 105 is in a low-pressure vacuum-pumping state to avoid refrigerant accumulation and maintain the overall circulation of the refrigerant and the normal operation;
referring to fig. 3, in the refrigeration process of the second indoor unit 105, a high-pressure gaseous refrigerant discharged from the compressor 101 enters the condenser 103 through the four-way valve D-C to be liquefied and condensed into a high-pressure liquid, and the high-pressure liquid refrigerant is throttled by opening a preset opening degree through the second expansion valve 107, wherein a part of the refrigerant flows through the suction end of the compressor 101 through the second solenoid valve 109 and the four-way valve E-S, and a part of the refrigerant directly enters the suction end of the compressor 101 through the fourth solenoid valve 111 to form a refrigerant cycle, and the first indoor unit 104 is in a low-pressure vacuum state to avoid refrigerant accumulation and maintain the overall cycle of the refrigerant and the normal operation of the.
Based on the air conditioner, the invention also discloses a heating control method of the air conditioner, which comprises the following steps:
when the first indoor unit 104 enters the heating mode, the end D is communicated with the end E, the end C is communicated with the end S, the compressor 101 is started, the first expansion valve 106 is opened to a preset opening degree, the second electromagnetic valve 109 and the second expansion valve 107 are closed, and the first electromagnetic valve 108 is opened;
referring to fig. 4, at this time, the compressor 101 discharges high-pressure gaseous refrigerant through the four-way valve D-E, high-temperature high-pressure gaseous refrigerant is discharged from the end E, the high-pressure gaseous refrigerant flows into the first indoor device 104 through the first solenoid valve 108, the high-pressure gaseous refrigerant is condensed into high-pressure liquid refrigerant in the first indoor device 104, so as to achieve the purpose of heating, the refrigerant is throttled by the first electronic expansion valve and becomes low-pressure liquid refrigerant, the low-pressure liquid refrigerant absorbs heat in the condenser 103 and is vaporized, and absorbs heat outside the room, and the low-pressure liquid refrigerant enters the suction end of the compressor 101 through the four-way valve C-.
Further, since the outlet of the first indoor unit 104 is connected to a first sub-path, the first sub-path is connected to the suction end through the third solenoid valve 110;
therefore, when the first indoor unit 104 enters the heating mode, the third solenoid valve 110 is closed, the fourth solenoid valve 111 is opened, and the fourth solenoid valve 111 is opened, so that the second indoor unit 105 is communicated with the suction end of the compressor 101, and the pipeline connected with the second indoor unit 105 is in a low-pressure vacuum state, thereby preventing the refrigerant from being accumulated in the pipeline of the second indoor unit 105 and ensuring the balance of the system refrigerant in the heating mode.
When the second indoor unit 105 enters the heating mode, the end D is communicated with the end E, the end C is communicated with the end S, the compressor 101 is started, the second expansion valve 107 is opened to a preset opening degree, the first solenoid valve 108 and the first expansion valve 106 are closed, and the second solenoid valve 109 is opened;
referring to fig. 5, at this time, the compressor 101 discharges high-pressure gaseous refrigerant through the four-way valve D-E, high-temperature high-pressure gaseous refrigerant is discharged from the end E, the high-pressure gaseous refrigerant flows into the second indoor unit 105 through the second solenoid valve 109, the high-pressure gaseous refrigerant is condensed into high-pressure liquid refrigerant in the second indoor unit 105, so as to achieve the purpose of heating, the refrigerant is throttled by the second electronic expansion valve and becomes low-pressure liquid refrigerant, the low-pressure liquid refrigerant absorbs heat in the condenser 103 and is vaporized, and absorbs heat outside the room, and the low-pressure liquid refrigerant enters the suction end of the compressor 101 through the four-way valve C-.
Further, since the outlet of the second indoor unit 105 is connected to a second sub-path, the second sub-path is connected to the suction end through the fourth solenoid valve 111;
therefore, when the second indoor unit 105 enters the heating mode, the fourth solenoid valve 111 is closed, the third solenoid valve 110 is opened, and the third solenoid valve 110 is opened, so that the first indoor unit 104 is communicated with the suction end of the compressor 101, and the pipeline connected with the first indoor unit 104 is in a low-pressure vacuum state, thereby preventing the refrigerant from being accumulated in the pipeline of the first indoor unit 104 and ensuring the balance of the system refrigerant in the heating mode.
In order to facilitate maintenance of the air conditioner, an outlet of the first indoor unit 104 is connected to the first solenoid valve 108 via a first air valve 112, an outlet of the first expansion valve 106 is connected to an inlet of the first indoor unit 104 via a first liquid valve 114, and the first indoor unit 104 is maintained by closing the first air valve 112 and the first liquid valve 114 to shut off a pipeline of the first indoor unit 104 from the compressor 101 and the condenser 103.
Similarly, the outlet of the second indoor unit 105 is connected to the second solenoid valve 109 via a second gas valve 113, the outlet of the second expansion valve 107 is connected to the inlet of the second indoor unit 105 via a second liquid valve 115, the pipes of the second indoor unit 105, the compressor 101 and the condenser 103 are closed by closing the second gas valve 113 and the second liquid valve 115, and the second indoor unit 105 is maintained.
It can be understood that, when the defrosting operation needs to be performed on the condenser 103, due to the two sets of throttling systems formed in this embodiment, when the first indoor device 104 is in the heating mode and needs to perform the defrosting operation, in order to avoid the first indoor device 104 entering the cooling state, the air conditioner enters the cooling mode of the second indoor device 105, so that the first indoor device 104 can perform the defrosting operation on the condenser 103 without entering the cooling mode; similarly, when the second indoor device 105 is in the heating mode and needs to perform defrosting operation, in order to avoid the second indoor device 105 entering the cooling state, the air conditioner enters the cooling mode of the first indoor device 104, so that the second indoor device 105 can perform defrosting operation on the condenser without entering the cooling mode, and the problem of sudden cooling and sudden heating caused by defrosting in the heating process of the air conditioner in winter is avoided.
Based on the physiological characteristics of the human body, the first indoor device 104 is an air supply indoor unit, the second indoor device 105 is a geothermal indoor unit, which is convenient for achieving the requirement of generating a temperature gradient required by human physiology by upper cooling and lower heating of the human body, and improving the comfort of the air conditioner in use.
It is understood that, on the basis of the embodiments disclosed in the present invention, a person skilled in the art may derive a plurality of first indoor units or second indoor units connected in parallel to form a multi-connected system as required, which may be regarded as modifications and substitutions to the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
In summary, the present invention forms two sets of throttling systems for respectively controlling the first indoor device 104 and the second indoor device 105 to enter the cooling or heating mode by switching the switches of the first expansion valve 106, the first solenoid valve 108, the second expansion valve 107 and the second solenoid valve 109, the two sets of throttling systems are independent from each other, and the refrigerant circulates in the two sets of throttling systems through the set of compressor 101 and the condenser 103, so that the first indoor device 104 and the second indoor device 105 can both enter the cooling or heating mode, the twin system with the same function of the first indoor device 104 and the second indoor device 105 is realized, the first indoor device 104 and the second indoor device 105 can both form a set of complete air conditioning system with outdoor devices, and multiple refrigerants are not required to be respectively used in different systems, the structure of the system is simplified, the installation cost of the system is reduced, and the heat loss caused by the secondary heat exchange among multiple refrigerants is avoided, the energy conversion efficiency is improved;
in the cooling mode of the first indoor unit 104, the first expansion valve 106 is opened, the second expansion valve 107 is closed, and both the first solenoid valve 108 and the second solenoid valve 109 are opened, so that the pipeline of the second indoor unit 105 is in a low-pressure vacuum-pumping state, refrigerant is prevented from accumulating in the pipeline of the second indoor unit 105, the refrigerant is circulated in a throttling system formed by the first indoor unit 104 as much as possible, and the refrigerant balance and the normal operation of the system are maintained; similarly, in the cooling mode of the second indoor unit 105, the first expansion valve 106 is closed, the second expansion valve 107 is opened, and both the first solenoid valve 108 and the second solenoid valve 109 are opened, so that the refrigerant circulates through the throttling system formed by the second indoor unit 105 as much as possible;
in the heating mode of the first indoor unit 104, the second electromagnetic valve 109 and the third electromagnetic valve 110 are controlled to be closed, and the first electromagnetic valve 108 and the fourth electromagnetic valve 111 are controlled to be opened, so that the pipeline of the second indoor unit 105 is in a low-pressure vacuum-pumping state, the refrigerant is prevented from being accumulated in the pipeline of the second indoor unit 105, and the stable circulation of the refrigerant in the heating mode of the first indoor unit 104 is ensured; similarly, in the heating mode of the second indoor device 105, the first electromagnetic valve 108 and the fourth electromagnetic valve 111 are controlled to be closed, and the second electromagnetic valve 109 and the third electromagnetic valve 110 are controlled to be opened, so that the pipeline of the first indoor device 104 is in a low-pressure vacuum-pumping state, refrigerant is prevented from being accumulated in the pipeline of the first indoor device 104, and stable circulation of the refrigerant in the heating mode of the second indoor device 105 is ensured.
The terms "first", "second", and the like are used herein to describe various information, but the information should not be limited to these terms, which are used only to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. An air conditioner, comprising:
the reversing assembly comprises a D end, a C end, an E end and an S end;
the compressor comprises an air outlet end and an air suction end, the air outlet end is connected with the D end, and the air suction end is connected with the S end;
a condenser comprising a first end and a second end, the first end being connected to the C-end;
a first indoor unit having an inlet connected to the second end through a first expansion valve and an outlet connected to the end E through a first solenoid valve;
and the inlet of the second indoor equipment is connected with the second end through a second expansion valve, and the outlet of the second indoor equipment is connected with the E end through a second electromagnetic valve.
2. The air conditioner according to claim 1, wherein a first sub path is connected to an outlet of the first indoor unit, the first sub path is connected to the suction end through a third solenoid valve, and a second sub path is connected to an outlet of the second indoor unit, the second sub path is connected to the suction end through a fourth solenoid valve.
3. The air conditioner according to claim 1 or 2, wherein an outlet of the first indoor unit is connected to the first solenoid valve via a first air valve, and an outlet of the first expansion valve is connected to an inlet of the first indoor unit via a first liquid valve.
4. The air conditioner according to claim 1 or 2, wherein an outlet of the second indoor unit is connected to the second solenoid valve via a second gas valve, and an outlet of the second expansion valve is connected to an inlet of the second indoor unit via a second liquid valve.
5. The air conditioner of claim 1, wherein the reversing component is a four-way valve.
6. The air conditioner according to claim 1, wherein the first indoor unit is a supply-air indoor unit, and the second indoor unit is a geothermal indoor unit.
7. A refrigeration control method of an air conditioner, characterized by comprising the air conditioner of claim 1, the method comprising:
when the first indoor equipment enters a refrigeration mode, the end D is communicated with the end C, the end E is communicated with the end S, the compressor is started, the first expansion valve is opened to a preset opening degree, the second expansion valve is closed, and the first electromagnetic valve and the second electromagnetic valve are opened;
when the second indoor equipment enters a refrigeration mode, the end D is communicated with the end C, the end E is communicated with the end S, the compressor is started, the second expansion valve is opened to a preset opening degree, the first expansion valve is closed, and the first electromagnetic valve and the second electromagnetic valve are opened.
8. A refrigeration control method of an air conditioner according to claim 7, wherein an outlet of the first indoor unit is connected to a first sub-path, the first sub-path is connected to the suction port through a third electromagnetic valve, an outlet of the second indoor unit is connected to a second sub-path, and the second sub-path is connected to the suction port through a fourth electromagnetic valve;
when the first indoor equipment or the second indoor equipment enters a refrigeration mode, the third electromagnetic valve and the fourth electromagnetic valve are both opened.
9. A heating control method of an air conditioner, characterized by comprising the air conditioner of claim 1, the method comprising:
when the first indoor equipment enters a heating mode, the end D is communicated with the end E, the end C is communicated with the end S, the compressor is started, the first expansion valve is opened to a preset opening degree, the second electromagnetic valve and the second expansion valve are closed, and the first electromagnetic valve is opened;
and when the second indoor equipment enters a heating mode, the end D is communicated with the end E, the end C is communicated with the end S, the compressor is started, the second expansion valve is opened to a preset opening degree, the first electromagnetic valve and the first expansion valve are closed, and the second electromagnetic valve is opened.
10. A heating control method of an air conditioner according to claim 9, wherein an outlet of the first indoor unit is connected to a first sub path, the first sub path is connected to the suction port through a third electromagnetic valve, an outlet of the second indoor unit is connected to a second sub path, the second sub path is connected to the suction port through a fourth electromagnetic valve;
when the first indoor equipment enters a heating mode, closing the third electromagnetic valve and opening the fourth electromagnetic valve;
and when the second indoor equipment enters a heating mode, closing the fourth electromagnetic valve and opening the third electromagnetic valve.
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| WO2010035982A2 (en) * | 2008-09-26 | 2010-04-01 | Jin Kum-Soo | Heat pump system |
| CN109210630A (en) * | 2018-09-29 | 2019-01-15 | 珠海格力电器股份有限公司 | Convection current radiation recombination heat-exchange system, heat exchange equipment and control method |
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Address after: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Applicant after: Hisense Air Conditioning Co.,Ltd. Address before: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Applicant before: HISENSE (SHANDONG) AIR-CONDITIONING Co.,Ltd. |
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Application publication date: 20200724 |