CN111396993A - Three-pipe air conditioning system, reheating and dehumidifying method and computer readable storage medium - Google Patents
Three-pipe air conditioning system, reheating and dehumidifying method and computer readable storage medium Download PDFInfo
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- CN111396993A CN111396993A CN202010240227.9A CN202010240227A CN111396993A CN 111396993 A CN111396993 A CN 111396993A CN 202010240227 A CN202010240227 A CN 202010240227A CN 111396993 A CN111396993 A CN 111396993A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000003303 reheating Methods 0.000 title claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 238000007791 dehumidification Methods 0.000 claims description 74
- 239000003507 refrigerant Substances 0.000 claims description 28
- 238000005057 refrigeration Methods 0.000 claims description 26
- 239000004576 sand Substances 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 description 23
- 238000009825 accumulation Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 230000000712 assembly Effects 0.000 description 7
- 238000000429 assembly Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000009423 ventilation Methods 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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0083—Indoor units, e.g. fan coil units with dehumidification means
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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
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a three-pipe air conditioning system. The system comprises: the indoor unit comprises a first indoor heat exchange assembly and a second indoor heat exchange assembly, wherein a first end of the first indoor heat exchange assembly is connected with an input end of a compressor in the outdoor unit through a first electromagnetic valve, and a second end of the second indoor heat exchange assembly is connected with an input end of the compressor in the outdoor unit through a four-way valve; the first end of the first indoor heat exchange assembly is also connected with the output end of a compressor in the outdoor unit through a second electromagnetic valve; and the third end of the first indoor heat exchange assembly and the fourth end of the second indoor heat exchange assembly are connected with the output end of an outdoor heat exchanger in the outdoor unit through a third electronic expansion valve. The invention also discloses a reheating and dehumidifying method and a computer readable storage medium. According to the invention, when the second indoor heat exchange assembly is used for refrigerating and dehumidifying, the first indoor heat exchange assembly can be used for heating so as to ensure that the indoor environment temperature is not reduced too much, thereby improving the comfort of users.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a three-pipe air conditioning system, a reheating and dehumidifying method and a computer readable storage medium.
Background
The existing dehumidification method of the air conditioner is generally refrigeration and dehumidification, namely an indoor unit operates in a refrigeration mode when the air conditioner dehumidifies. The basic principle is as follows: in the refrigeration cycle, liquid refrigerant is evaporated in the indoor heat exchanger in a heat absorption manner, so that the surface temperature of the indoor heat exchanger reaches below the dew point temperature of air at the indoor side, part of steam in the air is condensed into water to be separated out, and the condensed water is discharged by a drainage device of the indoor unit, so that the aim of dehumidifying the indoor space is fulfilled. But the method reduces the indoor temperature while dehumidifying, is easy to cause discomfort of human bodies and reduces the comfort of users.
Disclosure of Invention
The invention mainly aims to provide a three-pipe air conditioning system, a reheating and dehumidifying method and a computer readable storage medium, and aims to solve the technical problem that the existing air conditioner cannot perform zone control, so that the use comfort of the air conditioner is poor.
To achieve the above object, the present invention provides a three-pipe air conditioning system, comprising: an indoor unit and an outdoor unit,
the indoor unit comprises a first indoor heat exchange assembly and a second indoor heat exchange assembly, wherein a first end of the first indoor heat exchange assembly is connected with the input end of a compressor in the outdoor unit through a first electromagnetic valve, and a second end of the second indoor heat exchange assembly is connected with the input end of the compressor in the outdoor unit through a four-way valve;
the first end of the first indoor heat exchange assembly is also connected with the output end of a compressor in the outdoor unit through a second electromagnetic valve;
the third end of the first indoor heat exchange assembly and the fourth end of the second indoor heat exchange assembly are both connected with the output end of an outdoor heat exchanger in the outdoor unit through a third electronic expansion valve;
when the three-pipe air conditioning system is in a refrigeration and dehumidification mode, the first electromagnetic valve is controlled to be disconnected and the second electromagnetic valve is controlled to be communicated, so that the first indoor heat exchange assembly heats while the second indoor heat exchange assembly performs refrigeration and dehumidification.
Optionally, the first indoor heat exchange assembly and the second indoor heat exchange assembly each include a plurality of indoor heat exchangers connected in parallel; each indoor heat exchanger in the first indoor heat exchange assembly is connected with a corresponding first electronic expansion valve in series, and each indoor heat exchanger in the second indoor heat exchange assembly is connected with a corresponding second electronic expansion valve in series and used for controlling the on-off of the refrigerant on the corresponding branch circuit through the first electronic expansion valve and the second electronic expansion valve respectively.
Optionally, the second indoor heat exchange assembly further comprises a cold accumulation device, the cold accumulation device is located on the coil pipe of at least one indoor heat exchanger in the second indoor heat exchange assembly, and the cold accumulation device is used for storing cold.
In addition, to achieve the above object, the present invention further provides a reheat dehumidification method, which is applied to the above three-pipe air conditioning system, and the method includes:
acquiring a control instruction of the three-pipe air conditioning system;
judging whether the three-pipe air conditioning system starts a reheating dehumidification mode or not according to the control instruction;
if the three-pipe air conditioning system starts a reheating dehumidification mode, the first electromagnetic valve is controlled to be disconnected and communicated with the second electromagnetic valve, so that the first indoor heat exchange assembly heats while the second indoor heat exchange assembly refrigerates and dehumidifies.
Optionally, after the step of controlling the first solenoid valve to be disconnected from the second solenoid valve, the method further comprises:
obtaining indoor ambient temperature T1Indoor set temperature TsAnd an indoor relative humidity d;
according to the indoor ambient temperature T1And the indoor set temperature TsAdjusting the heating capacity of the first indoor heat exchange assembly and the refrigerating capacity of the second indoor heat exchange assembly;
adjusting the dehumidification capacity of the second indoor heat exchanger assembly in dependence on the indoor relative humidity d.
Optionally, the step of adjusting the reheat capacity of the first indoor heat exchanger assembly and the cooling capacity of the second indoor heat exchanger assembly according to the indoor ambient temperature and the indoor set temperature includes:
when T is1－TsWhen the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is larger than a first threshold value, the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is controlled to be reduced, and the opening degree of the third electronic expansion valve is controlled to be increased;
when T iss－T1When the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is larger than a second threshold value, the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is controlled to be increased, and the opening degree of the third electronic expansion valve is controlled to be decreased;
when T is1－TsIs less than or equal to a first threshold value and Ts－T1When the opening degree of the first electronic expansion valve and the opening degree of the third electronic expansion valve in the first indoor heat exchange assembly are not larger than a second threshold value, the opening degrees of the first electronic expansion valve and the third electronic expansion valve in the first indoor heat exchange assembly are controlled to be unchanged;
wherein the first threshold and the second threshold are positive numbers.
Optionally, the adjustment range of the opening degrees of the first electronic expansion valve and the third electronic expansion valve is the pair of the indoor environment temperature T1And indoor set temperature TsThe absolute value of the difference value of (a) is rounded and then multiplied by a preset step length.
Optionally, the step of adjusting the dehumidification amount of the second indoor heat exchanger assembly according to the indoor relative humidity d comprises:
when d is less than a third threshold value, controlling the opening degree of the second electronic expansion valve in the second indoor heat exchange assembly to increase;
when d is larger than a fourth threshold value, controlling the opening degree of the second electronic expansion valve in the second indoor heat exchange assembly to be reduced;
when the third threshold value is not less than d and not more than the fourth threshold value, controlling the opening degree of the second electronic expansion valve in the second indoor heat exchange assembly to be unchanged;
wherein the third threshold is less than the fourth threshold.
Optionally, the value range of the third threshold and the fourth threshold is 40% to 60%.
In addition, to achieve the above object, the present invention further provides a computer readable storage medium storing a reheat dehumidification program, which implements the steps of the reheat dehumidification method described above when executed by a processor.
The invention provides a three-pipe air conditioning system, a reheating and dehumidifying method and a computer readable storage medium. The three-pipe air conditioning system comprises an indoor unit and an outdoor unit, wherein the indoor unit comprises a first indoor heat exchange assembly and a second indoor heat exchange assembly, the first end of the first indoor heat exchange assembly is connected with the input end of a compressor in the outdoor unit through a first electromagnetic valve, and the second end of the second indoor heat exchange assembly is connected with the input end of the compressor in the outdoor unit through a four-way valve; the first end of the first indoor heat exchange assembly is also connected with the output end of a compressor in the outdoor unit through a second electromagnetic valve; the third end of the first indoor heat exchange assembly and the fourth end of the second indoor heat exchange assembly are both connected with the output end of an outdoor heat exchanger in the outdoor unit through a third electronic expansion valve; when the three-pipe air conditioning system is in a refrigeration and dehumidification mode, the first electromagnetic valve is controlled to be disconnected and the second electromagnetic valve is controlled to be communicated, so that the first indoor heat exchange assembly heats while the second indoor heat exchange assembly performs refrigeration and dehumidification. Through the mode, the first indoor heat exchange assembly can perform heating while the second indoor heat exchange assembly performs refrigeration to achieve an indoor dehumidification effect by utilizing the zone control of the three-pipe air conditioning system, so that the indoor environment temperature is not reduced too much, and the comfort of a user is improved.
Drawings
FIG. 1 is a schematic structural diagram of a three-pipe air conditioning system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a three-pipe air conditioning system according to yet another embodiment of the present invention;
FIG. 3 is a schematic flow chart of a reheat dehumidification method according to a first embodiment of the present invention;
FIG. 4 is a schematic flow chart of a reheating dehumidification method according to a second embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | Indoor machine | 2 | Outdoor machine |
| 3 | First indoor |
4 | First indoor |
| 5 | Second |
6 | First electromagnetic valve |
| 7 | Compressor with a compressor housing having a plurality of compressor blades | 8 | Four-way valve |
| 9 | |
10 | Third |
| 11 | Indoor heat exchanger | 12 | First |
| 13 | Indoor heat exchanger | 14 | Second electronic expansion valve |
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a three-pipe air conditioning system according to an embodiment of the present invention.
The three-pipe air conditioning system comprises: an indoor unit 1 and an outdoor unit 2,
the indoor unit 1 comprises a first indoor heat exchange assembly 3 and a second indoor heat exchange assembly 4, wherein a first end of the first indoor heat exchange assembly 3 is connected with an input end of a compressor 7 in the outdoor unit 2 through a first electromagnetic valve 6, and a second end of the second indoor heat exchange assembly 4 is connected with an input end of the compressor 7 in the outdoor unit 2 through a four-way valve 8;
the first end of the first indoor heat exchange assembly 3 is also connected with the output end of a compressor 7 in the outdoor unit 2 through a second electromagnetic valve 5;
the third end of the first indoor heat exchange assembly 3 and the fourth end of the second indoor heat exchange assembly 4 are both connected with the output end of an outdoor heat exchanger 9 in the outdoor unit 2 through a third electronic expansion valve 10;
when the three-pipe air conditioning system is in a refrigeration and dehumidification mode, the first electromagnetic valve 6 is controlled to be disconnected and the second electromagnetic valve 5 is controlled to be communicated, so that the first indoor heat exchange component 3 heats while the second indoor heat exchange component 4 performs refrigeration and dehumidification.
Specifically, in this embodiment, the three-pipe air conditioning system includes one or more indoor units 1 and outdoor units 2, the number of the indoor units 1 may be one or more, when there are multiple indoor units 1, the refrigeration and dehumidification control for different rooms may be simultaneously implemented, and the indoor units 1 may be on-hook machines or cabinet machines. The indoor unit 1 comprises a first indoor heat exchange assembly 3 and a second indoor heat exchange assembly 4, a first end of the first indoor heat exchange assembly 3 is connected with an input end of a compressor 7 in the outdoor unit 2 through a first electromagnetic valve 6, a second end of the second indoor heat exchange assembly 4 is connected with an input end of the compressor 7 in the outdoor unit 2 through a four-way valve 8, and a first end of the first indoor heat exchange assembly 3 is also connected with an output end of the compressor 7 in the outdoor unit 2 through a second electromagnetic valve 5; and the third end of the first indoor heat exchange assembly 3 and the fourth end of the second indoor heat exchange assembly 4 are both connected with the output end of an outdoor heat exchanger 9 in the outdoor unit 2 through a third electronic expansion valve 10. Because the first end of first indoor heat exchange assemblies 3 can be connected with the input of compressor 7 through first solenoid valve 6, perhaps is connected with the output of compressor 7 through second solenoid valve 5, consequently, three control air conditioning system can realize the different operating modes of three control air conditioning system through controlling first solenoid valve 6 and the intercommunication of second solenoid valve 5 or disconnection in this embodiment, if normal heating, normal refrigeration and refrigeration dehumidification mode.
Specifically, the working principle of realizing different operation modes of the three-control air conditioning system by controlling the connection or disconnection of the first electromagnetic valve 6 and the second electromagnetic valve 5 is as follows:
when the three-pipe air conditioning system is in the normal heating mode, the first electromagnetic valve 6 is controlled to be disconnected and communicated with the second electromagnetic valve 5, so that a portion of the high-pressure refrigerant outputted from the output end of the compressor 7 flows to the second indoor heat exchange assembly 4 through the four-way valve 8 (at this time, the connection direction of four ports in the four-way valve 8 is opposite to that shown in fig. 1), and a portion of the high-pressure refrigerant flows to the first indoor heat exchange assembly 3 through the second solenoid valve 5, and at this time, the first indoor heat exchange assembly 3 and the second indoor heat exchange assembly 4 are equivalent to condensers, the indoor air is heated, high-pressure refrigerant after heat exchange is carried out through the first indoor heat exchange assembly 3 and the second indoor heat exchange assembly 4 flows through the outdoor heat exchanger 9 and the four-way valve 8 through the third electronic expansion valve 10, and finally is input from the input end of the compressor 7, and the circulation heating process of the three-pipe air conditioning system is achieved through the reciprocating circulation.
When the three-pipe air conditioning system is in a normal refrigeration mode, the connection of the first electromagnetic valve 6 and the disconnection of the second electromagnetic valve 5 are controlled, so that all high-pressure refrigerants output from the output end of the compressor 7 flow to the outdoor heat exchanger 9 through the four-way valve 8 (at the moment, the connection directions of four ports in the four-way valve 8 are the same as those shown in figure 1), at the moment, the outdoor heat exchanger 9 is equivalent to a condenser, the first indoor heat exchange assembly 3 and the second indoor heat exchange assembly 4 are equivalent to evaporators, the high-pressure refrigerants after heat exchange through the outdoor heat exchanger 9 respectively flow to the first indoor heat exchange assembly 3 and the second indoor heat exchange assembly 4 through the third electronic expansion valve 10, the indoor air is respectively refrigerated through the first indoor heat exchange assembly 3 and the second indoor heat exchange assembly 4, and the low-pressure refrigerants after heat exchange through the first indoor heat exchange assembly 3 and the second indoor heat exchange assembly 4 are input, the circulation is repeated in this way, and the circulation refrigeration process of the three-pipe air conditioning system is realized.
When the three-pipe air conditioning system is in a refrigeration and dehumidification mode, by controlling the first solenoid valve 6 to be disconnected and the second solenoid valve 5 to be communicated, a part of high-pressure refrigerant output from the output end of the compressor 7 flows to the outdoor heat exchanger 9 through the four-way valve 8 (at this time, the connection direction of four ports in the four-way valve 8 is the same as that shown in fig. 1), and a part of high-pressure refrigerant flows to the first indoor heat exchange assembly 3 through the second solenoid valve 5, at this time, the outdoor heat exchanger 9 and the indoor heat exchanger in the first indoor heat exchange assembly 3 are equivalent to condensers, so that the first indoor heat exchange assembly 3 can heat indoor air, the refrigerant after heat exchange between the outdoor heat exchanger 9 and the first indoor heat exchange assembly 3 is converged at the third end of the first indoor heat exchange assembly 3 and flows to the fourth end of the second indoor heat exchange assembly 4, at this time, the second indoor heat exchange assembly 4 is equivalent, and finally, the refrigerant flows out of the second end of the second indoor heat exchange assembly 4, flows into the input end of the compressor 7 through the four-way valve 8, and is finally input from the input end of the compressor 7, and the refrigerant and the dehumidification process of the three-pipe air conditioning system are realized through the reciprocating circulation. In this process, first indoor heat exchange assembly 3 is used for realizing heating the room air, and second indoor heat exchange assembly 4 is used for realizing refrigerating the dehumidification to the room air, and consequently, above-mentioned three control air conditioning system can play the effect of refrigeration dehumidification, can heat the room air again, guarantees that the room air temperature can not descend too much because of the dehumidification, influences user's travelling comfort.
Those skilled in the art will appreciate that the three-duct air conditioning system configuration shown in FIG. 1 does not constitute a limitation of a three-duct air conditioning system and may include more or fewer components than shown, or some components in combination, or a different arrangement of components. The three-pipe air conditioning system can also comprise other common function modes, such as a ventilation mode and the like.
This embodiment is through the split control of three control air conditioning system indoor heat exchange assemblies for when the indoor heat exchange assemblies of second refrigerate and reach indoor dehumidification effect, first indoor heat exchange assemblies can heat, and it is too much to guarantee that indoor ambient temperature can not descend, thereby improves user's travelling comfort.
Further, the first indoor heat exchange assembly 3 and the second indoor heat exchange assembly 4 both comprise a plurality of indoor heat exchangers connected in parallel; each indoor heat exchanger in the first indoor heat exchange assembly 3 is connected with a corresponding first electronic expansion valve in series, and each indoor heat exchanger in the second indoor heat exchange assembly 4 is connected with a corresponding second electronic expansion valve in series and used for controlling the on-off of the refrigerant on the corresponding branch circuit through the first electronic expansion valve and the second electronic expansion valve respectively.
In this embodiment, the first indoor heat exchange assembly 3 and the second indoor heat exchange assembly 4 may include one indoor heat exchanger or a plurality of indoor heat exchangers connected in parallel. In order to ensure that the first indoor heat exchange assembly 3 and the second indoor heat exchange assembly 4 control the temperature of the indoor air more flexibly, the first indoor heat exchange assembly 3 and the second indoor heat exchange assembly 4 preferably comprise a plurality of indoor heat exchangers arranged in parallel, wherein the number of the indoor heat exchangers in the first indoor heat exchange assembly 3 and the second indoor heat exchange assembly 4 can be the same or different and can be 2, 3 or any other number. Each indoor heat exchanger in the first indoor heat exchange assembly 3 is connected with at least one first electronic expansion valve in series, each indoor heat exchanger in the second indoor heat exchange assembly 4 is connected with at least one second electronic expansion valve in series, wherein the first electronic expansion valve can be arranged in the first indoor heat exchange assembly 3 at a position close to the first end, can also be arranged in the first indoor heat exchange assembly 3 at a position close to the third end, and can also be arranged in the first indoor heat exchange assembly 3 at a position close to the first end and the third end; the second electronic expansion valve may be disposed in the second indoor heat exchange assembly 4 near the second end, may also be disposed in the second indoor heat exchange assembly 4 near the fourth end, and may also be disposed in the second indoor heat exchange assembly 4 near the second end and the fourth end, respectively.
Preferably, the first indoor heat exchange assembly 3 in this embodiment includes 2 indoor heat exchangers 11 arranged in parallel, and one end of each indoor heat exchanger 11 is respectively connected in series to one electronic expansion valve 12; the second indoor heat exchange assembly 4 comprises 2 indoor heat exchangers 13 arranged in parallel, one end of each indoor heat exchanger 13 is connected with an electronic expansion valve 14 in series, as shown in fig. 2, the total heating capacity of the two indoor heat exchangers 11 in the first indoor heat exchange assembly 3 is controlled by controlling the on-off of the 2 first electromagnetic expansion valves 12, and the total refrigerating capacity of the two indoor heat exchangers 13 in the second indoor heat exchange assembly 4 is controlled by controlling the on-off of the 2 second electromagnetic expansion valves 14.
In this embodiment, the first electronic expansion valve and the second electronic expansion valve are respectively and serially arranged on the branch path of each indoor heat exchanger in the first indoor heat exchange assembly and the second indoor heat exchange assembly, so as to control the on-off of the refrigerant on the corresponding branch path by controlling the on-off of each first electronic expansion valve and each second electronic expansion valve, thereby better realizing the heating effect of the first indoor heat exchange assembly and the refrigerating and dehumidifying effect of the second indoor heat exchange assembly.
Further, the second indoor heat exchange assembly 4 further includes a cold storage device (not shown in the figure), the cold storage device is located on the coil pipe of at least one indoor heat exchanger in the second indoor heat exchange assembly 4, and the cold storage device is used for storing cold.
Specifically, the second indoor heat exchange assembly 4 includes a plurality of indoor heat exchangers arranged in parallel, and a cold storage device may be installed on a coil of any one or more of the indoor heat exchangers. The cold accumulation device contains a cold accumulation medium which absorbs cold in the coil pipe to accumulate cold, and the cold accumulation medium can be water, eutectic salt solution or other energy storage materials, and the invention is not limited in particular.
When the three-pipe air conditioner is in a normal refrigeration or refrigeration dehumidification mode, the second electronic expansion valve on the branch circuit of the cold accumulation device can be selectively controlled to be communicated or disconnected, so that the cold accumulation function of opening or closing the cold accumulation device is realized, the cold accumulation device is used for storing cold, and the stored cold can be used for releasing cold to perform quick refrigeration when the air conditioner is started.
Referring to fig. 3, fig. 3 is a schematic flow chart of a reheating dehumidification method according to a first embodiment of the present invention, where the reheating dehumidification method includes:
and step S10, acquiring a control instruction of the three-pipe air conditioning system.
In this embodiment, a user can control the three-control air conditioning system through a remote controller key or a touch key on a touch pad, so as to execute operations such as starting, closing, operation mode selection, temperature and wind speed setting of the three-control air conditioning system. After the three-control air conditioning system is started to operate, a control instruction of a user is obtained, and the three-control air conditioning system is controlled according to the control instruction of the user.
And step S20, judging whether the three-pipe air conditioning system starts a reheating dehumidification mode or not according to the control instruction.
Because the three-control air conditioning system can realize different refrigerating and heating effects through the first indoor heat exchange assembly and the second indoor heat exchange assembly in the indoor unit according to different operation modes selected by a user, after a control instruction is obtained, the operation mode selected by the user is judged according to the control instruction, and whether the current operation mode of the three-control air conditioning system is a reheating dehumidification mode or not is judged. If the three-pipe air conditioning system starts the reheat dehumidification mode, step S30 is executed.
And step S30, the first electromagnetic valve is controlled to be disconnected and communicated with the second electromagnetic valve, so that the first indoor heat exchange assembly heats while the second indoor heat exchange assembly performs cooling and dehumidification.
When the three-pipe air conditioning system is in a refrigeration and dehumidification mode, the first electromagnetic valve is controlled to be disconnected and communicated with the second electromagnetic valve, so that part of high-pressure refrigerant output from the output end of the compressor flows to the outdoor heat exchanger through the four-way valve (at the moment, the connection direction of four ports in the four-way valve is the same as that shown in figure 1), and part of high-pressure refrigerant flows to the first indoor heat exchange assembly through the second electromagnetic valve, at the moment, the outdoor heat exchanger and the indoor heat exchanger in the first indoor heat exchange assembly are equivalent to condensers, so that the first indoor heat exchange assembly can heat indoor air, the refrigerant subjected to heat exchange through the outdoor heat exchanger and the first indoor heat exchange assembly is converged at the third end of the first indoor heat exchange assembly and flows to the fourth end of the second indoor heat exchange assembly, at the moment, the second indoor heat exchange assembly is equivalent to an evaporator to refrigerate and dehumidify the indoor air, and then flows into the input end of the compressor through the four-way valve, and finally is input from the input end of the compressor, and the refrigeration and dehumidification processes of the three-pipe air conditioning system are realized by the reciprocating circulation. In this in-process, first indoor heat exchange assembly is used for realizing heating the room air, and the indoor heat exchange assembly of second is used for realizing refrigerating the dehumidification to the room air, and consequently, above-mentioned three control air conditioning system can play the effect of refrigeration dehumidification, can heat the room air again, guarantees that the room air temperature can not descend too much because of the dehumidification, influences user's travelling comfort.
This embodiment is through the split control of three control air conditioning system indoor heat exchange assemblies for when the indoor heat exchange assemblies of second refrigerate and reach indoor dehumidification effect, first indoor heat exchange assemblies can heat, and it is too much to guarantee that indoor ambient temperature can not descend, thereby improves user's travelling comfort.
Further, referring to fig. 4, fig. 4 is a flowchart illustrating a second embodiment of the reheating dehumidification method according to the present invention, based on the reheating dehumidification method illustrated in fig. 3, in the step S30: after the first electromagnetic valve is controlled to be disconnected and the second electromagnetic valve is controlled to be communicated, the method comprises the following steps:
step S40, obtaining indoor environment temperature T1Indoor set temperature TsAnd the indoor relative humidity d.
An indoor unit of the three-pipe air conditioning system is provided with an indoor ambient temperature detection device and an indoor relative humidity detection device, and the installation position of the indoor unit can be arranged at an air inlet of the indoor unit or on the surface of a shell for acquiring the indoor ambient temperature T in real time1And indoor relative humidity d. At the same time, by obtaining a control instruction triggered by a userObtaining indoor set temperature T in control instructions。
Step S50, according to the indoor environment temperature T1And the indoor set temperature TsAnd regulating the heating capacity of the first indoor heat exchange assembly and the refrigerating capacity of the second indoor heat exchange assembly.
Obtaining the indoor ambient temperature T1And indoor set temperature TsThen according to the indoor environment temperature T1And indoor set temperature TsDetermining the matching relation between the heating capacity of the first indoor heat exchange assembly and the refrigerating capacity of the second indoor heat exchanger assembly, and controlling the opening degrees of the first electronic expansion valve and the third electronic expansion valve according to the heating capacity of the first indoor heat exchange assembly and the refrigerating capacity of the second indoor heat exchanger assembly.
Specifically, the step S50 includes:
step S501, when T is reached1－TsAnd when the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is greater than a first threshold value, controlling the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly to be reduced, and controlling the opening degree of the third electronic expansion valve to be increased.
When T is1－TsWhen the temperature is higher than the first threshold value, the indoor environment temperature is higher than the indoor set temperature, the indoor temperature is higher, and the temperature needs to be reduced and dehumidified, that is, the heating capacity of the first indoor heat exchange assembly needs to be reduced, so as to increase the total refrigerating capacity of the indoor heat exchange assembly, because the refrigerant flowing out of the output end of the compressor carries out heating on one path through the first indoor heat exchange component and carries out heat exchange on the other path through the outdoor heat exchanger, thus, the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is controlled to be decreased, and the opening degree of the third electronic expansion valve is controlled to be increased, the heating capacity of the outdoor heat exchanger is increased while the heating capacity of the first indoor heat exchange assembly is reduced, thereby guarantee that the total heating capacity of air conditioner is unchangeable, and the refrigerating output of the indoor heat exchange assembly of second is unchangeable basically, finally make the total refrigerating output increase of indoor heat exchange assembly to reach the purpose of cooling dehumidification.
Step S502, when T is reacheds－T1In the case of the second threshold value,and controlling the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly to increase, and controlling the opening degree of the third electronic expansion valve to decrease.
When T iss－T1When the temperature is higher than the second threshold value, the indoor environment temperature is lower than the indoor set temperature, the indoor temperature is lower, the temperature is required to be raised and the dehumidification is required, that is, the heating capacity of the first indoor heat exchange assembly is required to be increased, so that the total refrigerating capacity of the indoor heat exchange assembly is reduced, because the refrigerant flowing out of the output end of the compressor carries out heating on one path through the first indoor heat exchange component and carries out heat exchange on the other path through the outdoor heat exchanger, therefore, the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is controlled to be increased, and the opening degree of the third electronic expansion valve is controlled to be decreased, the heating capacity of the outdoor heat exchanger is reduced while the heating capacity of the first indoor heat exchange assembly is increased, thereby guarantee that the total heating capacity of air conditioner is unchangeable, and the refrigerating output of the indoor heat exchange assembly of second is unchangeable basically, finally make the total refrigerating output of indoor heat exchange assembly reduce to reach the mesh that heaies up the dehumidification.
Step S503, when T is reached1－TsIs less than or equal to a first threshold value and Ts－T1And when the opening degree of the first electronic expansion valve and the opening degree of the third electronic expansion valve in the first indoor heat exchange assembly are not larger than a second threshold value, the opening degrees of the first electronic expansion valve and the third electronic expansion valve in the first indoor heat exchange assembly are controlled to be unchanged.
When T is1－TsIs less than or equal to a first threshold value and Ts－T1When the second threshold value is less than or equal to, the indoor environment temperature slightly floats up and down at the indoor set temperature at the moment, temperature rise or temperature reduction is not needed, namely, the total refrigerating capacity of the indoor heat exchange assembly is changed without changing the heating capacity of the first indoor heat exchange assembly at the moment, because the refrigerant flowing out of the output end of the compressor heats through the first indoor heat exchange assembly on one way and exchanges heat through the outdoor heat exchanger on one way, therefore, the opening degree of the first electronic expansion valve and the opening degree of the third electronic expansion valve in the first indoor heat exchange assembly are controlled to be unchanged, the heating capacity of the outdoor heat exchanger is unchanged while the heating capacity of the first indoor heat exchange assembly is unchanged, the total heating capacity of the air conditioner is ensured to be unchanged, and the second indoor environment temperature slightly floats up and downThe refrigerating capacity of the heat exchange assembly is basically unchanged, and finally the total refrigerating capacity of the indoor heat exchange assembly is unchanged, so that the aim of keeping constant temperature is fulfilled.
The first threshold value and the second threshold value represent set temperature compensation values, and the first threshold value and the second threshold value are positive numbers. Preferably, the value range of the first threshold and the second threshold is 0-5 ℃.
Specifically, the sequence of the steps S501 to S503 may be adjusted according to actual needs, and the present invention is not limited specifically. In the above steps S501 to S503, the adjustment range of the opening degrees of the first electronic expansion valve and the third electronic expansion valve may be adjusted in fixed steps, or may be adjusted according to the indoor ambient temperature T1And indoor set temperature TsThe step size is dynamically adjusted. In this embodiment, preferably, the adjustment range of the opening degrees of the first electronic expansion valve and the third electronic expansion valve is set to the indoor ambient temperature T1And indoor set temperature TsThe absolute value of the difference value of (a) is rounded and then multiplied by a preset step length. It should be noted that the preset step size here can be any step size such as 1 step, 2 steps, 3 steps, etc.
The heating capacity of first indoor heat exchange assembly is adjusted through the size of indoor ambient temperature and indoor settlement temperature in this embodiment, realizes the control to indoor temperature from this to guarantee that indoor temperature can not descend too much in refrigeration dehumidification process.
Step S60, adjusting the dehumidification capacity of the second indoor heat exchanger assembly according to the indoor relative humidity d.
After the indoor relative humidity d is obtained, the dehumidification amount of the second indoor heat exchanger assembly is determined according to the indoor relative humidity d, and therefore the opening degree of the second electronic expansion valve is controlled according to the dehumidification amount of the second indoor heat exchanger assembly.
Specifically, the step S60 includes:
and step S601, when d is smaller than a third threshold value, controlling the opening degree of the second electronic expansion valve in the second indoor heat exchange assembly to increase.
When d is less than the third threshold value, it indicates that the indoor relative humidity is low at this time, and the dehumidification amount needs to be reduced, because the refrigerant flowing out of the output end of the compressor heats through the first indoor heat exchange component in one way and exchanges heat through the outdoor heat exchanger in one way, and finally, the refrigerant is refrigerated and dehumidified through the second indoor heat exchange component, the opening degree of the second electronic expansion valve in the second indoor heat exchange component is controlled to be increased, so that the refrigerant flow passing through the second indoor heat exchange component is increased, the temperature of the coil pipe in the second indoor heat exchange component is further increased, and the dehumidification amount of the second indoor heat exchange component is reduced.
Step S602, when d is greater than a fourth threshold, controlling an opening degree of the second electronic expansion valve in the second indoor heat exchange assembly to decrease.
When d is less than the third threshold value, it indicates that the indoor relative humidity is higher at this time, and the dehumidification amount needs to be increased, because the refrigerant flowing out of the output end of the compressor heats through the first indoor heat exchange component on one way and exchanges heat through the outdoor heat exchanger on one way, and finally, the refrigerant is refrigerated and dehumidified through the second indoor heat exchange component, the opening degree of the second electronic expansion valve in the second indoor heat exchange component is controlled to be reduced, so that the refrigerant flow passing through the second indoor heat exchange component is reduced, the temperature of the coil pipe in the second indoor heat exchange component is reduced, and the dehumidification amount of the second indoor heat exchange component is increased.
Step S603, when the third threshold value is not less than d and not more than the fourth threshold value, controlling the opening degree of the second electronic expansion valve in the second indoor heat exchange assembly to be unchanged.
When the third threshold value d is less than or equal to the fourth threshold value, the indoor relative humidity is within a preset allowable range at the moment, and the dehumidification amount does not need to be increased or reduced.
The third threshold value is smaller than the fourth threshold value. Preferably, the value range of the third threshold and the fourth threshold is 40% -60%.
Specifically, the sequence of the step S601 to the step S603 may be adjusted according to actual needs, and the present invention is not particularly limited. In the steps S601 to S603, the adjustment range of the opening degree of the second electronic expansion valve may be adjusted in a fixed step, or the step may be dynamically adjusted according to the indoor relative humidity.
In this embodiment, through obtaining indoor ambient temperature, indoor set temperature and indoor relative humidity to realize the regulation to indoor temperature according to indoor ambient temperature and indoor set temperature, realize the regulation to indoor humidity according to indoor relative humidity, thereby realized indoor temperature and indoor humidity's independent control, improved user's travelling comfort.
In addition, the embodiment of the invention also provides a computer readable storage medium.
The computer readable storage medium of the present invention stores a reheat dehumidification program, which when executed by a processor, implements the steps of:
acquiring a control instruction of the three-pipe air conditioning system;
judging whether the three-pipe air conditioning system starts a reheating dehumidification mode or not according to the control instruction;
if the three-pipe air conditioning system starts a reheating dehumidification mode, the first electromagnetic valve is controlled to be disconnected and communicated with the second electromagnetic valve, so that the first indoor heat exchange assembly heats while the second indoor heat exchange assembly refrigerates and dehumidifies.
Further, when executed by the processor, the reheat dehumidification method further comprises the steps of:
obtaining indoor ambient temperature T1Indoor set temperature TsAnd an indoor relative humidity d;
according to the indoor ambient temperature T1And the indoor set temperature TsAdjusting the heating capacity of the first indoor heat exchange assembly and the refrigerating capacity of the second indoor heat exchange assembly;
adjusting the dehumidification capacity of the second indoor heat exchanger assembly in dependence on the indoor relative humidity d.
Further, when executed by the processor, the reheat dehumidification method further comprises the steps of:
when T is1－TsWhen the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is larger than a first threshold value, the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is controlled to be reduced, and the opening degree of the third electronic expansion valve is controlled to be increased;
when T iss－T1When the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is larger than a second threshold value, the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is controlled to be increased, and the opening degree of the third electronic expansion valve is controlled to be decreased;
when T is1－TsIs less than or equal to a first threshold value and Ts－T1When the opening degree of the first electronic expansion valve and the opening degree of the third electronic expansion valve in the first indoor heat exchange assembly are not larger than a second threshold value, the opening degrees of the first electronic expansion valve and the third electronic expansion valve in the first indoor heat exchange assembly are controlled to be unchanged;
wherein the first threshold and the second threshold are positive numbers.
Further, when executed by the processor, the reheat dehumidification method further comprises the steps of:
the adjustment range of the opening degree of the first electronic expansion valve and the opening degree of the third electronic expansion valve is right to the indoor environment temperature T1And indoor set temperature TsThe absolute value of the difference value of (a) is rounded and then multiplied by a preset step length.
Further, when executed by the processor, the reheat dehumidification method further comprises the steps of:
when d is less than a third threshold value, controlling the opening degree of the second electronic expansion valve in the second indoor heat exchange assembly to increase;
when d is larger than a fourth threshold value, controlling the opening degree of the second electronic expansion valve in the second indoor heat exchange assembly to be reduced;
when the third threshold value is not less than d and not more than the fourth threshold value, controlling the opening degree of the second electronic expansion valve in the second indoor heat exchange assembly to be unchanged;
wherein the third threshold is less than the fourth threshold.
Further, when executed by the processor, the reheat dehumidification method further comprises the steps of:
the value range of the third threshold and the fourth threshold is 40-60%.
The specific embodiment of the computer readable storage medium of the present invention is substantially the same as the embodiments of the reheating dehumidification method described above, and therefore, the detailed description thereof is omitted here.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A three-pipe air conditioning system, the system comprising: an indoor unit and an outdoor unit,
the indoor unit comprises a first indoor heat exchange assembly and a second indoor heat exchange assembly, wherein a first end of the first indoor heat exchange assembly is connected with the input end of a compressor in the outdoor unit through a first electromagnetic valve, and a second end of the second indoor heat exchange assembly is connected with the input end of the compressor in the outdoor unit through a four-way valve;
the first end of the first indoor heat exchange assembly is also connected with the output end of a compressor in the outdoor unit through a second electromagnetic valve;
the third end of the first indoor heat exchange assembly and the fourth end of the second indoor heat exchange assembly are both connected with the output end of an outdoor heat exchanger in the outdoor unit through a third electronic expansion valve;
when the three-pipe air conditioning system is in a refrigeration and dehumidification mode, the first electromagnetic valve is controlled to be disconnected and the second electromagnetic valve is controlled to be communicated, so that the first indoor heat exchange assembly heats while the second indoor heat exchange assembly performs refrigeration and dehumidification.
2. The three-pipe air conditioning system of claim 1, wherein each of the first indoor heat exchange assembly and the second indoor heat exchange assembly includes a plurality of indoor heat exchangers connected in parallel; each indoor heat exchanger in the first indoor heat exchange assembly is connected with a corresponding first electronic expansion valve in series, and each indoor heat exchanger in the second indoor heat exchange assembly is connected with a corresponding second electronic expansion valve in series and used for controlling the on-off of the refrigerant on the corresponding branch circuit through the first electronic expansion valve and the second electronic expansion valve respectively.
3. The three-pipe air conditioning system of claim 1, wherein the second indoor heat exchange assembly further comprises a cold storage device located on the coil of at least one indoor heat exchanger in the second indoor heat exchange assembly, the cold storage device being configured to store cold.
4. A reheating dehumidification method applied to the three-pipe air conditioning system as claimed in any one of claims 1 to 3, the method comprising:
acquiring a control instruction of the three-pipe air conditioning system;
judging whether the three-pipe air conditioning system starts a reheating dehumidification mode or not according to the control instruction;
if the three-pipe air conditioning system starts a reheating dehumidification mode, the first electromagnetic valve is controlled to be disconnected and communicated with the second electromagnetic valve, so that the first indoor heat exchange assembly heats while the second indoor heat exchange assembly refrigerates and dehumidifies.
5. The reheat dehumidification method as set forth in claim 4, wherein, after said step of controlling said first solenoid valve to be disconnected and said second solenoid valve to be connected, comprising:
obtaining indoor ambient temperature T1Indoor set temperature TsAnd an indoor relative humidity d;
according to the indoor ambient temperature T1And the indoor set temperature TsAdjusting the heating capacity of the first indoor heat exchange assembly and the refrigerating capacity of the second indoor heat exchange assembly;
adjusting the dehumidification capacity of the second indoor heat exchanger assembly in dependence on the indoor relative humidity d.
6. The reheat dehumidification method as claimed in claim 5, wherein said step of adjusting the heating capacity of said first indoor heat exchanger assembly and the cooling capacity of said second indoor heat exchanger assembly based on said indoor ambient temperature and said indoor set temperature comprises:
when T is1－TsWhen the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is larger than a first threshold value, the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is controlled to be reduced, and the opening degree of the third electronic expansion valve is controlled to be increased;
when T iss－T1When the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is larger than a second threshold value, the opening degree of the first electronic expansion valve in the first indoor heat exchange assembly is controlled to be increased, and the opening degree of the third electronic expansion valve is controlled to be decreased;
when T is1－TsIs less than or equal to a first threshold value and Ts－T1When the opening degree of the first electronic expansion valve and the opening degree of the third electronic expansion valve in the first indoor heat exchange assembly are not larger than a second threshold value, the opening degrees of the first electronic expansion valve and the third electronic expansion valve in the first indoor heat exchange assembly are controlled to be unchanged;
wherein the first threshold and the second threshold are positive numbers.
7. The reheat dehumidification method as claimed in claim 6, wherein the adjustment range of the opening degrees of the first and third electronic expansion valves is set to the indoor ambient temperature T1And indoor set temperature TsThe absolute value of the difference value of (a) is rounded and then multiplied by a preset step length.
8. The reheat dehumidification method as set forth in claim 5, wherein said step of adjusting the amount of dehumidification of said second indoor heat exchanger assembly as a function of said indoor relative humidity d comprises:
when d is less than a third threshold value, controlling the opening degree of the second electronic expansion valve in the second indoor heat exchange assembly to increase;
when d is larger than a fourth threshold value, controlling the opening degree of the second electronic expansion valve in the second indoor heat exchange assembly to be reduced;
when the third threshold value is not less than d and not more than the fourth threshold value, controlling the opening degree of the second electronic expansion valve in the second indoor heat exchange assembly to be unchanged;
wherein the third threshold is less than the fourth threshold.
9. The reheat dehumidification method as claimed in claim 8, wherein the third threshold value and the fourth threshold value range from 40% to 60%.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a reheat dehumidification program, which when executed by a processor, implements the steps of the reheat dehumidification method as recited in any one of claims 4 to 9.
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