CN117287777A - Multi-mode heat recovery air conditioner and control method thereof - Google Patents
Multi-mode heat recovery air conditioner and control method thereof Download PDFInfo
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- CN117287777A CN117287777A CN202311387398.4A CN202311387398A CN117287777A CN 117287777 A CN117287777 A CN 117287777A CN 202311387398 A CN202311387398 A CN 202311387398A CN 117287777 A CN117287777 A CN 117287777A
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- 238000011084 recovery Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 173
- 239000003507 refrigerant Substances 0.000 claims abstract description 100
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 94
- 238000005057 refrigeration Methods 0.000 claims abstract description 62
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 12
- 230000000717 retained effect Effects 0.000 abstract description 20
- 230000014759 maintenance of location Effects 0.000 abstract description 8
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- F24F5/0003—Exclusively-fluid systems
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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
-
- 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
- F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
-
- 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
-
- 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
- F25B41/37—Capillary tubes
-
- 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
- F25B41/40—Fluid line arrangements
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Signal Processing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Sustainable Development (AREA)
- Fluid Mechanics (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention provides a multi-mode heat recovery air conditioner and a control method thereof, wherein the multi-mode heat recovery air conditioner comprises: the air conditioner comprises a compressor, a condenser, an evaporator, a liquid storage tank, a water heater, a throttle valve A, a third pipeline and/or a fourth pipeline, wherein the liquid storage tank can be communicated with the first pipeline through the third pipeline, gas is led out from the liquid storage tank to the third pipeline in a compression refrigeration mode, and the gas flows through the water heater to guide liquid-state refrigerant in the water heater back to an air suction end of the compressor; the liquid storage tank can also be communicated with the second pipeline through the fourth pipeline, gas is led out to the fourth pipeline through the liquid storage tank in the heat recovery single-evaporator refrigeration mode, and flows through the condenser to guide liquid refrigerant in the condenser back to the suction end of the compressor. According to the invention, the part of the heat exchanger which does not participate in the system circulation can timely return the retained liquid refrigerant to the compressor, so that the problem of insufficient system refrigerant circulation caused by the retention of part of the liquid refrigerant of the multi-mode refrigerating system is solved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-mode heat recovery air conditioner and a control method thereof.
Background
Statistics show that the energy consumption of the refrigeration equipment in the data center machine room is about 40% of the total energy consumption of the data center, and the huge heat dissipation amount released continuously by the data center for 24 hours is usually discharged outdoors through the refrigeration equipment, which is a huge energy waste. Considering the energy-saving requirement, the heat dissipation capacity can be used as a heat source for winter heating, for example, heating hot water is prepared by a heat recovery mode, and the requirement of municipal heating or heating of staff in a data center is met.
The multifunctional and multipurpose air conditioner for the data center machine room has the primary task of ensuring the constant temperature and humidity regulation and control requirement of the data center and the secondary task of realizing additional functions. The heat recovery unit has a plurality of operation modes, and in some operation modes, part of the heat exchangers do not participate in the circulation of the system, so that liquid refrigerant can be retained in the heat exchangers and the retention is uncontrollable, thus the refrigerant circulation quantity of the refrigeration system is possibly insufficient in the operation process, and the liquid refrigerant in the heat exchangers in the non-working state is required to be returned to participate in the circulation of the system as soon as possible.
Therefore, how to integrate various refrigeration systems to form a multifunctional refrigeration unit and how to solve the problems of operation reliability and control, so as to realize more energy-saving and higher-efficiency operation, and the multifunctional refrigeration unit is worthy of being explored, researched and developed by designers.
Because the machine room air conditioner in the prior art has the technical problems that part of heat exchangers do not participate in the circulation of the system in certain operation modes, liquid refrigerant is retained in the heat exchangers and the retention is uncontrollable, the circulation of the refrigerant of the refrigeration system is insufficient in the operation process, and the like, the invention designs the multi-mode heat recovery air conditioner and the control method thereof.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects that the refrigerant circulation quantity of the refrigeration system is insufficient in the operation process because the liquid refrigerant is retained in the part of the heat exchangers and the retention quantity is uncontrollable in the part of the heat exchangers which do not participate in the circulation of the system in certain operation modes in the machine room air conditioner in the prior art, so that the multi-mode heat recovery air conditioner and the control method thereof are provided.
In order to solve the above problems, the present invention provides a multi-mode heat recovery air conditioner, comprising:
the device comprises a compressor, a condenser, an evaporator, a liquid storage tank, a water heater and a throttle valve A, wherein the compressor, the condenser, the liquid storage tank, the throttle valve A and the evaporator form a main circulation system, one end of the water heater can be communicated to an air suction end or an air discharge end of the compressor, the other end of the water heater is communicated to the liquid storage tank through a first pipeline, one end of the condenser can be communicated to the air discharge end or the air suction end of the compressor, and the other end of the water heater can be communicated to the liquid storage tank through a second pipeline;
the liquid storage tank can be communicated with the first pipeline through the third pipeline, so that gas can be led out of the third pipeline through the liquid storage tank in a compression refrigeration mode, and the liquid refrigerant flows through the water heater to be led back to the suction end of the compressor; the liquid storage tank can be communicated with the second pipeline through the fourth pipeline, so that gas can be led out to the fourth pipeline through the liquid storage tank in a heat recovery single-evaporator refrigeration mode, and the liquid refrigerant in the condenser can be led back to the suction end of the compressor through the condenser.
In some embodiments of the present invention, in some embodiments,
the third pipeline is provided with a throttling device B, and the fourth pipeline is also provided with a throttling device A.
In some embodiments of the present invention, in some embodiments,
the throttling device A and the throttling device B are capillary tubes; one end of the third pipeline is communicated with one end of the fourth pipeline and then communicated with the top end of the liquid storage tank.
In some embodiments of the present invention, in some embodiments,
the third pipeline is connected with the fourth pipeline at a first joint, the third pipeline is connected with the first pipeline at a second joint, and the fourth pipeline is connected with the second pipeline at a third joint.
In some embodiments of the present invention, in some embodiments,
the other end of the first pipeline is communicated with the inner top end of the liquid storage tank, and the other end of the second pipeline is communicated with the inner top end of the liquid storage tank through a fifth pipeline; the first pipeline is provided with a one-way valve B, the one-way valve B is arranged to only allow fluid to flow from the water heater to the liquid storage tank, the fifth pipeline is provided with a one-way valve A, and the one-way valve A is arranged to only allow fluid to flow towards the liquid storage tank.
In some embodiments of the present invention, in some embodiments,
the liquid storage tank further comprises a sixth pipeline and a seventh pipeline, one end of the sixth pipeline is communicated to a position below the liquid level in the liquid storage tank, the other end of the sixth pipeline is communicated with the throttle valve A, one end of the seventh pipeline is communicated with the sixth pipeline, the other end of the seventh pipeline is communicated with the second pipeline, and the seventh pipeline is further provided with a throttle valve B.
In some embodiments of the present invention, in some embodiments,
when the other end of the first pipeline is communicated to the inner top end of the liquid storage tank, the other end of the second pipeline is communicated to the inner top end of the liquid storage tank through a fifth pipeline: the seventh pipeline, the second pipeline and the fifth pipeline are connected together at a fourth joint.
In some embodiments of the present invention, in some embodiments,
the four-way valve comprises a first end, a second end, a third end and a fourth end, wherein the first end is communicated with the water heater, the second end is communicated with the exhaust end of the compressor, the third end is communicated with the condenser, and the fourth end is communicated with the inside of the gas-liquid separator; one end of the evaporator is communicated with the throttle valve A, the other end of the evaporator is communicated into the gas-liquid separator through an eighth pipeline, and the air suction end of the compressor is communicated into the gas-liquid separator through a ninth pipeline.
The invention also provides a control method of the multi-mode heat recovery air conditioner, which comprises the following steps:
judging, namely judging whether the operation mode is one of a compression refrigeration mode, a water heating mode, a heat recovery single-evaporator refrigeration mode and a heat recovery double-evaporator refrigeration mode;
and controlling reversing of the four-way valve, closing and opening of the throttle valve A, and closing and opening of the throttle valve B, so that gas is led out to the third pipeline through the liquid storage tank in a compression refrigeration mode, flows through the water heater to lead the liquid refrigerant in the water heater back to the suction end of the compressor, and is led out to the fourth pipeline through the liquid storage tank in a heat recovery single-evaporator refrigeration mode, and flows through the condenser to lead the liquid refrigerant in the condenser back to the suction end of the compressor.
In some embodiments of the present invention, in some embodiments,
the control step, when the operation mode is a compression refrigeration mode, controls the first end and the fourth end of the four-way valve to be conducted, the second end and the third end to be conducted, the throttle valve A is controlled to be opened and automatically adjusted, and the opening of the throttle valve B is adjusted to be maximum;
when the operation mode is a water heating mode, the first end and the second end of the four-way valve are controlled to be conducted, the third end and the fourth end of the four-way valve are controlled to be conducted, the throttle valve A is controlled to be closed, and the throttle valve B is controlled to be opened and automatically adjusted;
when the operation mode is a heat recovery single-evaporator refrigeration mode, the first end and the second end of the four-way valve are controlled to be conducted, the third end and the fourth end of the four-way valve are controlled to be conducted, the throttle valve A is controlled to be opened and automatically adjusted, and the throttle valve B is controlled to be closed;
when the operation mode is a heat recovery double-evaporator refrigeration mode, the first end and the second end of the four-way valve are controlled to be conducted, the third end and the fourth end of the four-way valve are controlled to be opened and automatically regulated, and the throttle valve A is controlled to be opened and automatically regulated.
The multi-mode heat recovery air conditioner and the control method thereof provided by the invention have the following beneficial effects:
1. according to the multi-mode liquid-state circulating system, the main circulating system is formed by the structural arrangement of the compressor, the condenser, the water heater, the evaporator and the throttle valve A, the water heater can be connected between the water heater and the air suction end or the air discharge end of the compressor, the condenser can also be connected between the water heater and the air discharge end or the air suction end of the compressor, and through the arrangement of the third pipeline and/or the fourth pipeline, the gas in the water heater can be guided to the water heater through the third pipeline in a compression refrigerating mode (the water heater does not participate in the refrigerant circulation and does not produce hot water at the moment), the liquid in the water heater is driven to return to the air suction end of the compressor, the liquid in the water heater can be guided to the condenser through the fourth pipeline in a heat recovery single-evaporator mode (the water heater participates in the refrigerant circulation at the moment), the liquid in the water heater does not participate in the refrigerating circulation and the condenser is driven to return to the air suction end of the compressor, so that the liquid in the condenser cannot participate in the system circulation can timely return the retained liquid refrigerant to the compressor, the retained liquid refrigerant in the multi-mode circulating system is guaranteed, the liquid refrigerant circulating system is reliably ensured, the problem of the multi-mode liquid-state circulating system cannot be solved, and the retained in the multi-mode refrigerating system is solved, and the problem of the retained liquid-state circulating system is not controlled, and the refrigerating system is guaranteed.
2. According to the invention, through key parts such as the four-way valve, the liquid storage tank, the throttling device and the like, a set of three-function heat recovery refrigerating system is built by matching the 1 electromagnetic four-way valve, the 2 one-way valves, the 2 expansion throttling valves and the 2 bypass capillary tubes, so that a conventional refrigerating mode, a water heating mode and a heat recovery refrigerating mode can be realized, the system can be applied to various working scenes, the number of valve elements for controlling the mode switching is very small, only 1 electromagnetic four-way valve and 2 throttling valves are required to be regulated and controlled, the mode switching is simple and reliable, and the fusion design problem of the heat recovery system and the conventional refrigerating system is solved.
Drawings
Fig. 1 is a system principle structural diagram of the three-function heat recovery machine room air conditioner of the present invention.
The reference numerals are expressed as:
1. a compressor; 2. a condenser; 3. an evaporator; 4. a throttle valve A; 5. a throttle valve B; 6. a water heater; 7. a throttle device A; 8. a four-way valve; C. a first end; D. a second end; E. a third end; s, a fourth end; 9. a gas-liquid separator; 10. a throttle device B; 11. a liquid storage tank; 12. a one-way valve A; 13. a one-way valve B; 14. an external fan; 15. an inner fan; o, first joint; p, a second joint; q, junction III; r, a fourth joint; 101. a first pipeline; 102. a second pipeline; 103. a third pipeline; 104. a fourth pipeline; 105. a fifth pipeline; 106. a sixth pipeline; 107. a seventh pipeline; 108. an eighth pipeline; 109. and a ninth pipeline.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
As shown in fig. 1, the present invention provides a multi-mode heat recovery air conditioner (preferably, a multi-mode heat recovery room air conditioner), comprising:
the air conditioner comprises a compressor 1, a condenser 2, an evaporator 3, a liquid storage tank 11, a water heater 6 and a throttle valve A4, wherein the compressor 1, the condenser 2, the liquid storage tank 11, the throttle valve A4 and the evaporator 3 form a main circulation system, one end of the water heater 6 can be communicated with an air suction end or an air discharge end of the compressor 1, the other end of the water heater 6 can be communicated with the liquid storage tank 11 through a first pipeline 101, one end of the condenser 2 can be communicated with the air discharge end or the air suction end of the compressor 1, and the other end of the water heater can be communicated with the liquid storage tank 11 through a second pipeline 102;
further comprising a third line 103 and/or a fourth line 104, said tank 11 being also able to communicate with said first line 101 through said third line 103, so as to be able to conduct, in a compressed refrigeration mode, gas out through said tank 11 into said third line 103 and through said water heater 6, so as to conduct the liquid refrigerant in said water heater 6 back to the suction end of said compressor 1; the accumulator 11 can also communicate with the second line 102 via the fourth line 104 to enable gas to be drawn through the accumulator 11 into the fourth line 104 in a heat recovery single evaporator refrigeration mode and to flow through the condenser 2 to direct liquid refrigerant in the condenser 2 back to the suction side of the compressor 1.
According to the multi-mode liquid-state circulating system, the main circulating system is formed by the structural arrangement of the compressor, the condenser, the water heater, the evaporator and the throttle valve A, the water heater can be connected between the water heater and the air suction end or the air discharge end of the compressor, the condenser can also be connected between the water heater and the air discharge end or the air suction end of the compressor, and through the arrangement of the third pipeline and/or the fourth pipeline, the gas in the water heater can be guided to the water heater through the third pipeline in a compression refrigerating mode (the water heater does not participate in the refrigerant circulation and does not produce hot water at the moment), the liquid in the water heater is driven to return to the air suction end of the compressor, the liquid in the water heater can be guided to the condenser through the fourth pipeline in a heat recovery single-evaporator mode (the water heater participates in the refrigerant circulation at the moment), the liquid in the water heater does not participate in the refrigerating circulation and the condenser is driven to return to the air suction end of the compressor, so that the liquid in the condenser cannot participate in the system circulation can timely return the retained liquid refrigerant to the compressor, the retained liquid refrigerant in the multi-mode circulating system is guaranteed, the liquid refrigerant circulating system is reliably ensured, the problem of the multi-mode liquid-state circulating system cannot be solved, and the retained in the multi-mode refrigerating system is solved, and the problem of the retained liquid-state circulating system is not controlled, and the refrigerating system is guaranteed.
In some embodiments of the present invention, in some embodiments,
the third pipeline 103 is provided with a throttling device B10, and the fourth pipeline 104 is also provided with a throttling device A7. The invention is a preferable structural form, namely, a throttling device B is preferably arranged on a third pipeline, so that the throttling and depressurization of the gas in the liquid storage tank in a compressed refrigeration mode can be carried out on the gas in the pipeline of the gas return water heater, and the gas in the liquid storage tank is high-pressure refrigerant gas condensed by the condenser, so that the gas needs to be throttled and depressurized in order to enable the gas to smoothly enter the water heater, so that larger impact on the suction end of the compressor is avoided, the retained liquid refrigerant in the water heater which does not work is effectively driven to return to the suction end of the compressor, and the refrigerant circulation quantity of the refrigeration system is ensured to be sufficient and reliable; through the preferred throttling arrangement A that sets up on the fourth pipeline, can carry out the throttle depressurization to the gas in the pipeline that gas in the liquid storage pot returns the condenser under the heat recovery single evaporator refrigeration mode, because the gas in the liquid storage pot is the high pressure refrigerant gas after the condensation of water heater, consequently in order to make it can get into the condenser smoothly, need carry out the throttle depressurization to it to guarantee can not cause great impact to the compressor suction end, and still will not work the liquid refrigerant drive of detaining in the condenser and return to the compressor suction end effectively, guarantee that refrigerating system's refrigerant circulation volume is sufficient reliable.
In some embodiments of the present invention, in some embodiments,
the throttling device A7 and the throttling device B10 are capillary tubes; one end of the third pipeline 103 is communicated with one end of the fourth pipeline 104 and then communicated with the top end of the liquid storage tank 11. The throttle device A and the throttle device B are the preferred structural forms of the invention, and can be preferably capillary tubes, namely, the throttle device A and the throttle device B can throttle and decompress the refrigerant passing through the throttle device B without control, so that the retained liquid refrigerant can be automatically driven to return to the suction end of the compressor; the third pipeline and the fourth pipeline are preferably communicated with the inside of the liquid storage tank together, so that the compactness of the structure is ensured, and according to different operation modes, the liquid storage tank can automatically lead out gas through the third pipeline or the fourth pipeline according to pressure difference and drive the retained liquid refrigerant in the inoperative heat exchanger to return to the suction end of the compressor.
In some embodiments of the present invention, in some embodiments,
the third pipeline 103 and the fourth pipeline 104 are connected at a joint of O, the third pipeline 103 and the first pipeline 101 are connected at a joint of two P, and the fourth pipeline 104 and the second pipeline 102 are connected at a joint of three Q. The first pipeline, the second pipeline, the third pipeline and the fourth pipeline are preferably connected, namely the first pipeline and the third pipeline are intersected at the P point position, the second pipeline and the fourth pipeline are intersected at the Q point position, the third pipeline and the fourth pipeline are intersected at the O point position, the liquid storage tank can be communicated to the first pipeline and the second pipeline through the third pipeline and the fourth pipeline respectively, and gas above the liquid storage tank can be led out to drive stagnant liquid refrigerant in a heat exchanger without heat exchange to return to a suction end of the compressor.
In some embodiments of the present invention, in some embodiments,
the other end of the first pipeline 101 is communicated with the inner top end of the liquid storage tank 11, and the other end of the second pipeline 102 is communicated with the inner top end of the liquid storage tank 11 through a fifth pipeline 105; the first pipe 101 is provided with a check valve B13, the check valve B13 is configured to allow fluid to flow from the water heater 6 to the liquid storage tank 11 only, the fifth pipe 105 is provided with a check valve a12, and the check valve a12 is configured to allow fluid to flow in the direction of the liquid storage tank 11 only.
The invention also preferably has the advantages that the first pipeline and the second pipeline are both communicated to the inner top end of the liquid storage tank (the second pipeline is communicated to the inner top end of the liquid storage tank through the fifth pipeline), the first pipeline is provided with the one-way valve B which only allows fluid to flow from the water heater to the liquid storage tank, and the fifth pipeline is provided with the one-way valve A which only allows fluid to flow from the condenser to the liquid storage tank, so that the refrigerant subjected to heat exchange of the water heater can be guided into the liquid storage tank in the hot water mode, the heat recovery single-evaporator mode or the heat recovery double-evaporator mode, the fluid in the liquid storage tank is prevented from flowing back to the condenser through the fifth pipeline, the refrigerant subjected to heat exchange of the condenser can be further caused to enter the liquid storage tank through the fifth pipeline in the compression refrigeration mode, the fluid in the liquid storage tank is prevented from flowing back to the water heater through the first pipeline, and normal and reliable operation of each mode of the refrigeration system is ensured.
In some embodiments of the present invention, in some embodiments,
the device further comprises a sixth pipeline 106 and a seventh pipeline 107, one end of the sixth pipeline 106 is communicated to a position below the liquid level in the liquid storage tank 11, the other end of the sixth pipeline 106 is communicated with the throttle valve A4, one end of the seventh pipeline 107 is communicated with the sixth pipeline 106, the other end of the seventh pipeline 107 is communicated with the second pipeline 102, and a throttle valve B5 is further arranged on the seventh pipeline 107.
According to the invention, the liquid refrigerant at the bottom of the liquid storage tank can be led out to the throttle valve A through the sixth pipeline to be throttled and depressurized, and then enters the evaporator to be evaporated and refrigerated, and the led-out refrigerant liquid can be ensured to be as much as possible through the sixth pipeline communicated with the liquid storage tank, so that the supercooling degree is improved, and the evaporation performance is improved; according to the invention, the sixth pipeline is communicated with the second pipeline through the arrangement of the seventh pipeline, so that the refrigerant is required to be led into the condenser to be evaporated (heat is absorbed to the outside) through the liquid storage tank, the partial pipe section of the sixth pipeline and the seventh pipeline to prepare hot water in a water heating mode, and the effect of pure water heating is realized; and ensuring that the refrigerant is respectively led to the condenser for evaporation and the evaporator for evaporation through the liquid storage tank, the sixth pipeline and the seventh pipeline in the heat recovery double-evaporator mode, so that the heat recovery double-evaporation effect of the water heater is realized.
In some embodiments of the present invention, in some embodiments,
when the other end of the first pipe 101 is connected to the inner top end of the liquid storage tank 11, the other end of the second pipe 102 is connected to the inner top end of the liquid storage tank 11 through the fifth pipe 105: the seventh pipeline 107, the second pipeline 102 and the fifth pipeline 105 are connected together at a junction with four R. The seventh pipeline, the second pipeline and the fifth pipeline are connected in a preferred mode, and the third pipeline, the second pipeline and the fifth pipeline are connected at the joint fourth, so that the fluid in the second pipeline can be guided into the liquid storage tank through the fifth pipeline, and the fluid in the seventh pipeline can enter the condenser through the second pipeline.
In some embodiments of the present invention, in some embodiments,
the four-way valve 8 comprises a first end C, a second end D, a third end E and a fourth end S, wherein the first end C is communicated with the water heater 6, the second end D is communicated with the exhaust end of the compressor 1, the third end E is communicated with the condenser 2, and the fourth end S is communicated with the interior of the gas-liquid separator 9; one end of the evaporator 3 is communicated with the throttle valve A4, the other end is communicated with the gas-liquid separator 9 through an eighth pipeline 108, and the suction end of the compressor 1 is communicated with the inside of the gas-liquid separator 9 through a ninth pipeline 109.
The invention is a further preferable structural form, the water heater is simply heated by the four-way valve through the connection mode of the four-way valve, the water heater is in a single heat recovery evaporation mode (the evaporator is in operation and the condenser is not in operation), the water heater is in a double heat recovery evaporation mode (the evaporator and the condenser are both in operation), the water heater is in a compression refrigeration mode (the condenser and the evaporator are both in operation and the water heater is not in operation), the liquid state refrigerant remained in the non-working heat exchanger can be effectively returned to the air suction port of the compressor in different modes on the basis of forming multiple modes, the sufficient refrigerant quantity in the refrigeration cycle loop is ensured, and the stable and reliable operation is ensured.
The improvement points of the invention are as follows:
1) Through key parts such as an electromagnetic four-way valve, a liquid storage tank, a bypass capillary tube and the like, a set of three-function heat recovery refrigeration system is built by matching 1 electromagnetic four-way valve, 2 one-way valves, 2 expansion throttle valves and 2 bypass capillary tubes;
2) The bypass throttling device A and the throttling device B enable the refrigerant liquid retained in the connected non-working condenser or water heater to return to the refrigeration cycle system as soon as possible, so that the shortage of the refrigerant circulation quantity of the system is avoided;
3) The electromagnetic four-way valve realizes the switching of the condensing heat exchanger of the high-pressure high-temperature refrigerant; the water heating mode can be realized by completely closing the throttle valve A and automatically adjusting the throttle valve B.
The invention solves the following technical problems:
1) The fusion design problem of the heat recovery system and the conventional refrigeration system;
2) Mode switching and liquid refrigerant retention and migration control issues for multi-mode refrigeration systems.
The beneficial effects are as follows:
1) The system can realize a conventional refrigeration mode, a hot water heating mode and a heat recovery refrigeration mode, and can be applied to various working scenes;
2) The valve elements for controlling the mode switching are very few, and only 1 electromagnetic four-way valve and 2 throttle valves are required to be regulated and controlled, so that the mode switching is simple and reliable;
3) The bypass capillary tube enables the refrigerant liquid in the connected heat exchanger to return to the refrigeration cycle system as soon as possible, and avoids the shortage of the refrigerant circulation volume of the system caused by the retention of part of liquid refrigerant in the system.
The invention also provides a control method of the multi-mode heat recovery air conditioner, which comprises the following steps:
judging, namely judging whether the operation mode is one of a compression refrigeration mode, a water heating mode, a heat recovery single-evaporator refrigeration mode and a heat recovery double-evaporator refrigeration mode;
a control step of controlling the reversing of the four-way valve 8 and the closing and opening of the throttle valve A4 and the closing and opening of the throttle valve B5 so that gas is led out through the liquid storage tank 11 into the third pipeline 103 in the compression refrigeration mode and flows through the water heater 6 to lead the liquid refrigerant in the water heater 6 back to the suction end of the compressor 1, and gas is led out through the liquid storage tank 11 into the fourth pipeline 104 in the heat recovery single-evaporator refrigeration mode and flows through the condenser 2 to lead the liquid refrigerant in the condenser 2 back to the suction end of the compressor 1.
According to the invention, through the reversing control of the four-way valve and the control of the throttle valve A and the throttle valve B, the gas in the liquid storage tank is led to the condenser through the fourth pipeline under the mode of the heat recovery single evaporator (at the moment, the water heater participates in the refrigerant circulation to prepare hot water, the condenser does not participate in the refrigeration circulation, and the evaporator participates in the circulation), and the liquid in the condenser is driven to return to the suction end of the compressor, so that the part of heat exchangers which do not participate in the system circulation can timely return the retained liquid refrigerant to the compressor, the sufficient and reliable refrigerant circulation quantity of the refrigeration system is ensured, the problem of insufficient system refrigerant circulation quantity caused by the retention of part of liquid refrigerant of the multi-mode refrigeration system is solved, and the control problems of mode switching and liquid refrigerant retention and migration of the multi-mode refrigeration system are also solved.
In some embodiments of the present invention, in some embodiments,
the control step, when the operation mode is a compression refrigeration mode, controls the first end C and the fourth end S of the four-way valve 8 to be conducted, the second end D and the third end E to be conducted, the throttle valve A4 is controlled to be opened and automatically adjusted, and the opening of the throttle valve B5 is adjusted to be maximum;
when the operation mode is a water heating mode, the first end C and the second end D of the four-way valve 8 are controlled to be conducted, the third end E and the fourth end S are controlled to be conducted, the throttle valve A4 is controlled to be closed, and the throttle valve B5 is controlled to be opened and automatically adjusted;
when the operation mode is a heat recovery single evaporator refrigeration mode, the first end C and the second end D of the four-way valve 8 are controlled to be communicated, the third end E and the fourth end S are controlled to be opened and automatically regulated, and the throttle valve A4 is controlled to be closed;
when the operation mode is a heat recovery dual-evaporator refrigeration mode, the first end C of the four-way valve 8 is communicated with the second end D, the third end E and the fourth end S are communicated, the throttle valve A4 is controlled to be opened and automatically adjusted, and the throttle valve B5 is controlled to be opened and automatically adjusted.
The invention is a preferred control mode of different operation modes, as shown in fig. 1, the high-pressure refrigerant gas at the gas outlet at the top of the liquid storage tank passes through the bypass capillary tube, so that the liquid refrigerant retained in the high-pressure heat exchanger (condenser or water heater) which does not participate in the circulation operation of the system can be pushed to return to the vapor-liquid separator as soon as possible and then gasified into gas, and then enters the compressor, thereby ensuring that the refrigeration circulation system has enough refrigerant circulation quantity.
As shown in fig. 1, the exhaust port of the compressor is connected to a port D (a second end D) of the four-way valve, a port C (a first end C) of the four-way valve is sequentially connected with a refrigerant inlet of the water heater and a one-way valve B, an outlet of the one-way valve B is connected to an inlet B of the liquid storage tank (i.e., a liquid storage tank port communicated with the first pipeline), and the throttling device B is connected with the refrigerant outlet of the water heater and a gas outlet at the top of the liquid storage tank; the E mouth (the third end E) of the four-way valve is connected to the inlet of the condenser, the outlet of the condenser is respectively connected with the inlet of the one-way valve A, the outlet of the throttling device A (preferably a capillary tube) and the throttle valve B, the outlet of the one-way valve A is connected to the inlet A of the liquid storage tank (namely the liquid storage tank mouth communicated with the fifth pipeline), the other end of the throttle valve B (preferably a capillary tube) is connected to the liquid outlet of the liquid storage tank, and the other end of the throttling device A and the outlet of the throttling device B are jointly connected to the gas outlet at the top of the liquid storage tank. Preferably, the inlet A, the inlet B and the gas outlet of the liquid storage tank are designed to be the same and are communicated with the top of the liquid storage tank, and the liquid storage tank is provided with a liquid outlet and takes liquid at the bottom of the liquid storage tank.
As shown in fig. 1, the liquid outlet of the liquid storage tank is respectively connected with a throttle valve a and a throttle valve B, the other end of the throttle valve a is connected with the inlet of the evaporator, the outlet of the evaporator and the inlet (the fourth end S) of the four-way valve are simultaneously connected with the inlet (the same inlet or independent inlets) of the vapor-liquid separator, and the outlet of the vapor-liquid separator is connected with the air suction port of the compressor.
It should be noted that, the fans of the condenser and the evaporator are only convenient for understanding and are not used for limiting the heat exchange pattern of the condenser and the evaporator. When the water fluorine heat exchanger is adopted, a water pump is matched; obviously, the heat exchange type of the water heater is not limited, and the proper design and selection can be carried out according to actual needs. The refrigerant circulation flow direction in the various circulation modes of fig. 1 is described in detail as follows:
1) Refrigerant circulation flow direction in compression refrigeration mode
The compressor works, the electromagnetic four-way valve is electrified and operated in a reversing way, and DE is conducted and CS is conducted. The throttle valve A is automatically adjusted, the opening of the throttle valve B is the largest, the flow resistance of the refrigerant passing through the one-way valve A is reduced, the one-way valve A is much larger than the flow of the refrigerant passing through the throttle valve B (the flow of the refrigerant passing through the throttle device A is ignored), and the one-way valve A is a main flow passage.
The high-pressure refrigerant gas at the top of the liquid storage tank flows into the water heater from the throttle device B and finally returns to the air suction port of the compressor, the refrigerant flow of the branch is very small, but the liquid refrigerant retained in the water heater can be pushed to return to the vapor-liquid separator as soon as possible and then gasified and then enter the compressor, and finally the water heater is filled with the low-pressure refrigerant gas, so that the circulating system has enough refrigerant circulation quantity.
The flow direction of the refrigerant in this mode is shown in the following table 1 (note: the gas of the liquid tank flows to the throttle device B, the liquid in the liquid tank flows to the throttle valve a, the refrigerant at the outlet of the throttle valve B directly flows to the throttle valve a, but the throttle valve B does not realize the throttle depressurization here, because the throttle valve B and the check valve a belong to parallel channels, the flow rate of the refrigerant at the throttle valve B is much smaller than that at the check valve a because the resistance is too large):
TABLE 1
2) Refrigerant circulation flow direction in heating water mode
The compressor works, the electromagnetic four-way valve is powered off and not commutated, DC is conducted, and ES is conducted. The throttle valve A is closed, and the throttle valve B is automatically adjusted. In this mode the check valve B is a primary flow path, with a much greater flow of refrigerant than the flow of refrigerant through the restriction B (the flow of refrigerant through the restriction a is negligible). The flow direction of the refrigerant in this mode is shown in table 2 below:
TABLE 2
3) Refrigerant circulation flow direction in heat recovery single evaporator refrigeration mode
The compressor works, the electromagnetic four-way valve is powered off and not commutated, DC is conducted, and ES is conducted; the throttle valve A is automatically adjusted, and the throttle valve B is closed. In this mode the check valve B is a primary flow path, with a much greater flow of refrigerant than the throttle device B.
The high-pressure refrigerant gas at the top of the liquid storage tank flows into the condenser from the throttle device A and finally returns to the air suction port of the compressor, the refrigerant flow of the branch is very small, but the liquid refrigerant retained in the condenser can be pushed to return to the vapor-liquid separator as soon as possible and then gasified and then enter the compressor, and finally the condenser is filled with the low-pressure refrigerant gas, so that the circulating system has enough refrigerant circulation quantity.
The flow direction of the refrigerant in this mode is shown in table 3 below:
TABLE 3 Table 3
4) Refrigerant circulation flow direction in heat recovery double-evaporator refrigeration mode
The compressor works, the electromagnetic four-way valve is powered off and not commutated, DC is conducted, and ES is conducted; the throttle valve A and the throttle valve B are automatically adjusted. In this mode the check valve B is much larger than the refrigerant flow through the throttle device B, which is the main flow path, and the refrigerant flow through the throttle device a is negligible.
The refrigerant flow direction of the system is as follows in table 4:
TABLE 4 Table 4
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (10)
1. A multi-mode heat recovery air conditioner, characterized by: comprising the following steps:
compressor (1), condenser (2), evaporimeter (3), liquid storage tank (11), water heater (6) and choke valve A (4), compressor (1), condenser (2), liquid storage tank (11), choke valve A (4) with evaporimeter (3) constitute main circulation system, the one end of water heater (6) can be linked together to the suction end or the exhaust end of compressor (1), the other end is linked together through first pipeline (101) to liquid storage tank (11), the one end of condenser (2) can be linked together to the exhaust end or the suction end of compressor (1), the other end can be linked together through second pipeline (102) to liquid storage tank (11);
-a third line (103) and/or a fourth line (104), through which third line (103) the tank (11) can also communicate with the first line (101) to enable gas to be led out through the tank (11) into the third line (103) in a compressed refrigeration mode and to flow through the water heater (6) to direct liquid refrigerant in the water heater (6) back to the suction side of the compressor (1); the liquid storage tank (11) can be communicated with the second pipeline (102) through the fourth pipeline (104) so as to lead out gas to the fourth pipeline (104) through the liquid storage tank (11) in a heat recovery single-evaporator refrigeration mode and flow through the condenser (2) to lead liquid refrigerant in the condenser (2) back to the suction end of the compressor (1).
2. The multi-mode heat recovery air conditioner of claim 1, wherein:
the third pipeline (103) is provided with a throttling device B (10), and the fourth pipeline (104) is also provided with a throttling device A (7).
3. The multi-mode heat recovery air conditioner of claim 2, wherein:
the throttling device A (7) and the throttling device B (10) are capillary tubes; one end of the third pipeline (103) is communicated with one end of the fourth pipeline (104) and then communicated with the top end of the interior of the liquid storage tank (11).
4. A multi-mode heat recovery air conditioner according to claim 3, wherein:
the third pipeline (103) and the fourth pipeline (104) are connected at a joint point I (O), the third pipeline (103) and the first pipeline (101) are connected at a joint point II (P), and the fourth pipeline (104) and the second pipeline (102) are connected at a joint point III (Q).
5. The multi-mode heat recovery air conditioner of claim 1, wherein:
the other end of the first pipeline (101) is communicated to the inner top end of the liquid storage tank (11), and the other end of the second pipeline (102) is communicated to the inner top end of the liquid storage tank (11) through a fifth pipeline (105); the first pipeline (101) is provided with a one-way valve B (13), the one-way valve B (13) is arranged to only allow fluid to flow from the water heater (6) to the liquid storage tank (11), the fifth pipeline (105) is provided with a one-way valve A (12), and the one-way valve A (12) is arranged to only allow fluid to flow towards the liquid storage tank (11).
6. The multi-mode heat recovery air conditioner according to any one of claims 1 to 5, wherein:
the device further comprises a sixth pipeline (106) and a seventh pipeline (107), one end of the sixth pipeline (106) is communicated to a position below the inner liquid level of the liquid storage tank (11), the other end of the sixth pipeline is communicated with the throttle valve A (4), one end of the seventh pipeline (107) is communicated with the sixth pipeline (106), the other end of the seventh pipeline is communicated with the second pipeline (102), and the seventh pipeline (107) is further provided with a throttle valve B (5).
7. The multi-mode heat recovery air conditioner of claim 6, wherein:
when the other end of the first pipeline (101) is communicated to the inner top end of the liquid storage tank (11), the other end of the second pipeline (102) is communicated to the inner top end of the liquid storage tank (11) through a fifth pipeline (105): the seventh pipeline (107), the second pipeline (102) and the fifth pipeline (105) are connected together at a junction four (R).
8. The multi-mode heat recovery air conditioner according to claim 6 or 7, wherein:
the air-liquid separator is characterized by further comprising a four-way valve (8) and an air-liquid separator (9), wherein the four-way valve (8) comprises a first end (C), a second end (D), a third end (E) and a fourth end (S), the first end (C) is communicated with the water heater (6), the second end (D) is communicated with the exhaust end of the compressor (1), the third end (E) is communicated with the condenser (2), and the fourth end (S) is communicated with the inside of the air-liquid separator (9); one end of the evaporator (3) is communicated with the throttle valve A (4), the other end of the evaporator is communicated to the gas-liquid separator (9) through an eighth pipeline (108), and the air suction end of the compressor (1) is communicated to the inside of the gas-liquid separator (9) through a ninth pipeline (109).
9. A control method of a multi-mode heat recovery air conditioner according to claim 8, wherein: comprising the following steps:
judging, namely judging whether the operation mode is one of a compression refrigeration mode, a water heating mode, a heat recovery single-evaporator refrigeration mode and a heat recovery double-evaporator refrigeration mode;
a control step of controlling the reversing of the four-way valve (8), and controlling the closing and opening of the throttle valve a (4), and controlling the closing and opening of the throttle valve B (5) such that gas is led out into the third pipeline (103) through the liquid storage tank (11) in a compression refrigeration mode and flows through the water heater (6) to lead the liquid refrigerant in the water heater (6) back to the suction end of the compressor (1), and gas is led out into the fourth pipeline (104) through the liquid storage tank (11) in a heat recovery single-evaporator refrigeration mode and flows through the condenser (2) to lead the liquid refrigerant in the condenser (2) back to the suction end of the compressor (1).
10. The control method according to claim 9, characterized in that:
the control step, when the operation mode is a compression refrigeration mode, controls the first end (C) of the four-way valve (8) to be communicated with the fourth end (S), the second end (D) to be communicated with the third end (E), the throttle valve A (4) is controlled to be opened and automatically adjusted, and the opening of the throttle valve B (5) is adjusted to be maximum;
when the operation mode is a water heating mode, the first end (C) and the second end (D) of the four-way valve (8) are controlled to be conducted, the third end (E) and the fourth end (S) are controlled to be conducted, the throttle valve A (4) is controlled to be closed, and the throttle valve B (5) is controlled to be opened and automatically adjusted;
when the operation mode is a heat recovery single-evaporator refrigeration mode, the first end (C) and the second end (D) of the four-way valve (8) are controlled to be conducted, the third end (E) and the fourth end (S) are controlled to be conducted, the throttle valve A (4) is controlled to be opened and automatically adjusted, and the throttle valve B (5) is controlled to be closed;
when the operation mode is a heat recovery double-evaporator refrigeration mode, the first end (C) of the four-way valve (8) is communicated with the second end (D), the third end (E) and the fourth end (S) are communicated, the throttle valve A (4) is controlled to be opened and automatically adjusted, and the throttle valve B (5) is controlled to be opened and automatically adjusted.
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| CN202311387398.4A CN117287777A (en) | 2023-10-24 | 2023-10-24 | Multi-mode heat recovery air conditioner and control method thereof |
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| CN202311387398.4A CN117287777A (en) | 2023-10-24 | 2023-10-24 | Multi-mode heat recovery air conditioner and control method thereof |
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