CN110779080B - Continuous heating heat recovery air conditioner outdoor system, heat recovery air conditioner and using method thereof - Google Patents
Continuous heating heat recovery air conditioner outdoor system, heat recovery air conditioner and using method thereof Download PDFInfo
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- CN110779080B CN110779080B CN201910956779.7A CN201910956779A CN110779080B CN 110779080 B CN110779080 B CN 110779080B CN 201910956779 A CN201910956779 A CN 201910956779A CN 110779080 B CN110779080 B CN 110779080B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
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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
- F24F5/0007—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 cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- 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
Abstract
The invention provides a continuous heating heat recovery air conditioner outdoor system, a heat recovery air conditioner and a using method thereof, relates to the field of air conditioners and solves the problem that the existing heat recovery air conditioner cannot continuously heat in a defrosting process and the heating comfort is influenced. The continuous heating heat recovery air conditioner outdoor system comprises a refrigerant output module and a heat exchange module; the heat exchange module comprises at least two heat exchangers connected in parallel, and the at least two heat exchangers are respectively communicated with the refrigerant output module through a four-way valve. The heat recovery air conditioner comprises an indoor system and the outdoor system of the continuous heating heat recovery air conditioner provided by the invention. When in use, the air conditioning system mainly comprises six forms of complete refrigeration, main body refrigeration, complete heating, main body heating, complete heat recovery and heating defrosting. The invention provides a continuous heating heat recovery air conditioner outdoor system, a heat recovery air conditioner and a using method thereof, wherein the continuous heating heat recovery air conditioner outdoor system can avoid the indoor temperature from dropping in the defrosting process and improve the heating comfort.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a continuous heating heat recovery air conditioner outdoor system, a heat recovery air conditioner with the continuous heating heat recovery air conditioner outdoor system and a using method of the heat recovery air conditioner.
Background
With the development of social economy, the demand for air conditioning functions in the market is increasing. In order to meet the demand of refrigeration, a single-cooling type air conditioner appears on the market; in order to meet the requirements of refrigeration in summer and heating in winter, heat pump air conditioners capable of refrigerating and heating appear in the market; in addition, the requirement that the same air conditioning system can simultaneously realize refrigeration of one part of rooms and heating of the other part of rooms is also needed, and a heat recovery type air conditioning system appears in the market aiming at the requirement. The existing heat recovery type air conditioning system in the market controls the direction of refrigerant flowing through an indoor unit in pipelines through different hydraulic valves so as to realize that each room is heated or cooled.
The applicant has found that the heat recovery air conditioner of the prior art has at least the following technical problems:
1. in the heating process, a heat exchanger placed outdoors needs to be suspended for defrosting, and the defrosting process cannot be used for continuously heating, so that the indoor temperature is reduced, and the heating comfort is influenced;
2. the heat exchanger is frequently switched between defrosting and working modes, and the frequency of the compressor is frequently increased and decreased, so that the energy is very wasted.
Disclosure of Invention
The invention aims to provide a continuous heating heat recovery air-conditioning outdoor system, a heat recovery air-conditioning provided with the continuous heating heat recovery air-conditioning outdoor system and a using method of the heat recovery air-conditioning outdoor system, and aims to solve the technical problems that the heat recovery air-conditioning in the prior art cannot continuously heat in a defrosting process and the heating comfort is influenced. The technical effects that can be produced by the preferred technical scheme in the technical schemes of the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a continuous heating heat recovery air conditioner outdoor system, which comprises a refrigerant output module and a heat exchange module; wherein the content of the first and second substances,
the heat exchange module comprises at least two heat exchangers connected in parallel, and the at least two heat exchangers are respectively communicated with the refrigerant output module through a four-way valve.
In a preferred or optional embodiment, the liquid refrigerant port of each heat exchanger is respectively communicated with a heat exchange expansion valve, and an outlet end of the heat exchange expansion valve is communicated with the liquid refrigerant port of the heat exchanger.
In a preferred or optional embodiment, the continuous heating and heat recovery air conditioning outdoor system further includes a temperature control module, and two ends of the temperature control module can be respectively communicated with the refrigerant output module and the air conditioning indoor system.
In a preferred or optional embodiment, the continuous heating and heat recovery air conditioning outdoor system further comprises a refrigerant recovery module, and an output end of the refrigerant recovery module is communicated with an input end of the refrigerant output module;
the temperature control module comprises a high-pressure pipeline and a low-pressure pipeline, wherein an outdoor high-pressure electromagnetic valve is arranged on the high-pressure pipeline, and an outdoor low-pressure electromagnetic valve is arranged on the low-pressure pipeline;
two ends of the high-pressure pipeline can be respectively communicated with the refrigerant output module and an indoor system of an air conditioner; and two ends of the low-pressure pipeline can be respectively communicated with the refrigerant recovery module and an indoor system of an air conditioner.
In a preferred or alternative embodiment, each of the four-way valves is capable of communicating with a low pressure line via a capillary tube.
In a preferred or optional embodiment, the continuous heating and heat recovery air conditioner outdoor system further comprises a supercooling module, wherein the supercooling module comprises a subcooler, and two ends of the supercooling module can be respectively communicated with the heat exchange module and the indoor system of the air conditioner.
In a preferred or alternative embodiment, the refrigerant output module comprises a compressor and an oil separator which are communicated in series.
The heat recovery air conditioner provided by the embodiment of the invention comprises an indoor system and an outdoor system of the continuous heating heat recovery air conditioner provided by any technical scheme of the invention; wherein the content of the first and second substances,
the continuous heating heat recovery air conditioner outdoor system also comprises a refrigerant recovery module;
the indoor system comprises a gaseous refrigerant conveying pipeline, a liquid refrigerant conveying pipeline and at least two indoor modules connected in parallel, wherein the gaseous refrigerant conveying pipeline comprises a gaseous refrigerant input pipeline and a gaseous refrigerant output pipeline, and each indoor module can be communicated with the gaseous refrigerant input pipeline, the gaseous refrigerant output pipeline and the liquid refrigerant conveying pipeline;
the gaseous refrigerant input pipeline can be communicated with the refrigerant output module, the gaseous refrigerant output pipeline can be communicated with the refrigerant recovery module, and the liquid refrigerant conveying pipeline can be communicated with the heat exchange module.
In a preferred or alternative embodiment, each of the indoor modules includes an indoor unit, an indoor high-pressure solenoid valve, and an indoor low-pressure solenoid valve;
the indoor unit is respectively communicated with a liquid refrigerant conveying pipeline and the gas refrigerant conveying pipeline, the indoor high-pressure electromagnetic valve is arranged on the gas refrigerant input pipeline, and the indoor low-pressure electromagnetic valve is arranged on the gas refrigerant output pipeline;
the continuous heating heat recovery air conditioner outdoor system comprises a temperature control module, the temperature control module comprises a high-pressure pipeline and a low-pressure pipeline, and two ends of the high-pressure pipeline can be respectively communicated with the refrigerant output module and the gaseous refrigerant input pipeline; and two ends of the low-pressure pipeline can be respectively communicated with the refrigerant recovery module and the gaseous refrigerant output pipeline.
The use method of the heat recovery air conditioner provided by the embodiment of the invention comprises the following modes:
a full cooling mode: each four-way valve is in a power-down state, so that the refrigerant output module is communicated with each heat exchanger, each indoor low-pressure electromagnetic valve is opened, each indoor high-pressure electromagnetic valve is closed, each outdoor high-pressure electromagnetic valve and each outdoor low-pressure electromagnetic valve are closed, and each heat exchange expansion valve is opened;
a main body refrigeration mode: the indoor cold requirement to be refrigerated is greater than the indoor heat requirement to be heated; each four-way valve is in a power-down state, so that the refrigerant output module is communicated with each heat exchanger, an indoor low-pressure electromagnetic valve in an indoor module to be refrigerated and an indoor high-pressure electromagnetic valve in an indoor module to be heated are opened, an indoor high-pressure electromagnetic valve in the indoor module to be refrigerated and an indoor low-pressure electromagnetic valve in the indoor module to be heated are closed, an outdoor high-pressure electromagnetic valve is opened, an outdoor low-pressure electromagnetic valve is closed, and each heat exchange expansion valve is opened;
complete heating mode: each four-way valve is in an electrified state, the refrigerant output module is blocked from being communicated with each heat exchanger, each indoor high-pressure electromagnetic valve is opened, each indoor low-pressure electromagnetic valve is closed, each outdoor high-pressure electromagnetic valve is opened, each outdoor low-pressure electromagnetic valve is closed, and each heat exchange expansion valve is opened;
main body heating mode: the indoor heat requirement needing to be heated is greater than the indoor cold requirement needing to be refrigerated; each four-way valve is in a power-on state, the refrigerant output module is blocked from being communicated with each heat exchanger, an indoor low-pressure electromagnetic valve in an indoor module to be refrigerated and an indoor high-pressure electromagnetic valve in an indoor module to be heated are opened, an indoor high-pressure electromagnetic valve in the indoor module to be refrigerated and an indoor low-pressure electromagnetic valve in the indoor module to be heated are closed, an outdoor high-pressure electromagnetic valve is opened, an outdoor low-pressure electromagnetic valve is closed, and each heat exchange expansion valve is opened;
full heat recovery mode: the indoor heat requirement needing to be heated is equal to the indoor cold requirement needing to be refrigerated; each four-way valve is in a power-on state, the refrigerant output module is blocked from being communicated with each heat exchanger, an indoor low-pressure electromagnetic valve in an indoor module to be refrigerated and an indoor high-pressure electromagnetic valve in an indoor module to be heated are opened, an indoor high-pressure electromagnetic valve in the indoor module to be refrigerated and an indoor low-pressure electromagnetic valve in the indoor module to be heated are closed, an outdoor high-pressure electromagnetic valve is opened, an outdoor low-pressure electromagnetic valve is closed, and each heat exchange expansion valve is closed;
heating and defrosting mode: the four-way valve connected with the heat exchanger needing defrosting is in a power-off state, the four-way valve connected with the heat exchanger not needing defrosting is in a power-on state, each indoor high-pressure electromagnetic valve is opened, each indoor low-pressure electromagnetic valve is closed, each outdoor high-pressure electromagnetic valve is opened, each outdoor low-pressure electromagnetic valve is closed, and each heat exchange expansion valve is opened.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
the invention provides a continuous heating heat recovery air conditioner outdoor system, which comprises a refrigerant output module and a heat exchange module, wherein the heat exchange module comprises at least two heat exchangers connected in parallel, when one of the heat exchangers defrosts, the other heat exchangers continue to perform heating work, the continuous heating work can be performed, the indoor temperature can not be reduced due to the stop work of the heat exchangers, and the comfort of heating is ensured; at least two heat exchangers are respectively communicated with the refrigerant output module through a four-way valve, so that independent defrosting of the heat exchangers can be realized, and meanwhile, because the four-way valve has smaller resistance in the reversing process, the pressure drop of the refrigerant in the pipeline is reduced, and the working efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a heat recovery air conditioner system according to the present invention;
FIG. 2 is a schematic view of the present invention providing full cooling mode operation;
FIG. 3 is a schematic diagram of the operation of the subject invention in a cooling mode;
FIG. 4 is a schematic view of the present invention in a full heating mode of operation;
FIG. 5 is a schematic diagram of the operation of the heating mode of the main body according to the present invention;
FIG. 6 is a schematic view of the full heat recovery mode of operation provided by the present invention;
FIG. 7 is a schematic view illustrating a first heating defrosting mode operation provided by the present invention;
fig. 8 is a schematic view illustrating a second heating defrosting mode of the present invention.
In the figure, 1, a continuous heating heat recovery air-conditioning outdoor system; 11. a refrigerant output module; 111. a compressor; 112. an oil separator; 12. a heat exchange module; 121. a heat exchanger; 122. a four-way valve; 123. a heat exchange expansion valve; 124. a capillary tube; 13. a temperature control module; 131. a high pressure line; 132. a low pressure line; 133. an outdoor high-pressure electromagnetic valve; 134. an outdoor low-pressure electromagnetic valve; 14. a refrigerant recovery module; 141. a gas-liquid separator; 15. a subcooling module; 151. a subcooler; 152. a subcooling expansion valve; 2. an indoor system; 21. a gaseous refrigerant conveying pipeline; 211. a gaseous refrigerant input pipeline; 212. a gaseous refrigerant output pipeline; 22. a liquid refrigerant conveying pipeline; 23. an indoor module; 231. an indoor unit; 232. an indoor high-pressure solenoid valve; 233. an indoor low-pressure solenoid valve; 234. an indoor expansion valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention provides a continuous heating heat recovery air conditioner outdoor system, a heat recovery air conditioner and a using method thereof, wherein the continuous heating heat recovery air conditioner outdoor system can avoid the indoor temperature from dropping in the defrosting process and improve the heating comfort.
The technical solution provided by the present invention is explained in more detail with reference to fig. 1 to 8.
As shown in fig. 1 to 8, the continuous heating heat recovery air conditioning outdoor system 1 provided by the present invention includes a refrigerant output module 11 and a heat exchange module 12; wherein the content of the first and second substances,
the heat exchange module 12 includes at least two heat exchangers 121 connected in parallel, and the at least two heat exchangers 121 are respectively communicated with the refrigerant output module 11 through a four-way valve 122.
The continuous heating heat recovery air conditioner outdoor system 1 comprises a refrigerant output module 11 and a heat exchange module 12, wherein the heat exchange module 12 comprises at least two heat exchangers 121 which are connected in parallel, when one heat exchanger 121 is defrosted, the rest heat exchangers 121 continue to perform heating work, continuous heating work can be performed, the indoor temperature is not reduced due to the fact that the heat exchangers 121 stop working, and the heating comfort is guaranteed; at least two heat exchangers 121 are respectively communicated with the refrigerant output module 11 through a four-way valve 122, so that independent defrosting of the heat exchangers 121 can be realized, and meanwhile, because the four-way valve 122 has small resistance in the reversing process, the pressure drop of the refrigerant in the pipeline is reduced, and the working efficiency is improved.
In a preferred or alternative embodiment, the liquid refrigerant port of each heat exchanger 121 is respectively communicated with a heat exchange expansion valve 123, and an outlet end of the heat exchange expansion valve 123 is communicated with the liquid refrigerant port of the heat exchanger 121.
Specifically, an outlet end of the heat exchange expansion valve 123 is communicated with a liquid refrigerant port of the heat exchanger 121, when a gaseous refrigerant flows to the heat exchange expansion valve 123 through the heat exchanger 121, the heat exchange expansion valve 123 performs a throttling and pressure reducing function on the refrigerant flowing through the heat exchange expansion valve 123, and when a liquid refrigerant flows to the heat exchanger 121 through the heat exchange expansion valve 123, the heat exchange expansion valve 123 performs a circulating function on the refrigerant flowing through the heat exchange expansion valve 123.
As a preferred or alternative embodiment, the continuous heating and heat recovery air conditioning outdoor system 1 further includes a temperature control module 13, and two ends of the temperature control module 13 can be respectively communicated with the refrigerant output module 11 and the air conditioning indoor system 2.
Specifically, the temperature control module 13 may control whether the gaseous refrigerant output by the refrigerant output module 11 directly enters the indoor system 2 of the air conditioner or is liquefied by the heat exchange module 12 and then enters the indoor system 2 of the air conditioner, so as to control whether the indoor system 2 of the air conditioner performs heating or cooling.
As a preferred or optional implementation, the continuous heating and heat recovery air conditioning outdoor system 1 further includes a refrigerant recovery module 14, and an output end of the refrigerant recovery module 14 is communicated with an input end of the refrigerant output module 11;
the temperature control module 13 comprises a high-pressure pipeline 131 and a low-pressure pipeline 132, wherein an outdoor high-pressure electromagnetic valve 133 is arranged on the high-pressure pipeline 131, and an outdoor low-pressure electromagnetic valve 134 is arranged on the low-pressure pipeline 132;
two ends of the high-pressure pipeline 131 can be respectively communicated with the refrigerant output module 11 and the indoor system 2 of the air conditioner; the two ends of the low pressure pipeline 132 can be respectively communicated with the refrigerant recovery module 14 and the indoor system 2 of the air conditioner.
Specifically, the high-pressure pipeline 131 is used for conveying the refrigerant to the indoor system 2 of the air conditioner for indoor heating, the low-pressure pipeline 132 is used for conveying the circulated refrigerant to the refrigerant recovery module 14, and the outdoor high-pressure solenoid valve 133 is opened, so that the gaseous refrigerant output by the refrigerant output module 11 can enter the indoor system 2 of the air conditioner. The refrigerant recovery module 14 includes a gas-liquid separator 141, and the circulated refrigerant enters the gas-liquid separator 141 through the low-pressure pipeline 132, is separated, and then enters the refrigerant output module 11 for the next cycle.
In a preferred or alternative embodiment, each of the four-way valves 122 is individually capable of communicating with a low pressure line 132 via a capillary tube 124.
Specifically, the capillary tube 124 functions as a bypass, and when the four-way valve 122 is in an energized state, a dead zone is formed after the gaseous refrigerant passes through the four-way valve 122, so that lubricating oil in the system is easily accumulated, or local pressure is too high; because the inner diameter of the capillary is very small, the flow rate of the whole main path cannot be influenced, and the whole working effect cannot be influenced.
As a preferred or alternative embodiment, the continuous heating and heat recovery air conditioning outdoor system 1 further includes a supercooling module 15, the supercooling module 15 includes a subcooler 151, and two ends of the supercooling module 15 can be respectively communicated with the heat exchange module 12 and the air conditioning indoor system 2.
Specifically, the supercooling module 15 includes a subcooler 151 and a supercooling expansion valve 152 which are connected in series, and the evaporation rate of the liquid refrigerant can be reduced by flowing the refrigerant through the supercooling module 15, so that the refrigeration efficiency and the comfort of the user can be improved.
In a preferred or alternative embodiment, the refrigerant output module 11 includes a compressor 111 and an oil separator 112 connected in series.
The heat recovery air conditioner provided by the embodiment of the invention comprises an indoor system 2 and an outdoor system 1 of the continuous heating heat recovery air conditioner provided by any technical scheme of the invention; wherein the content of the first and second substances,
the continuous heating heat recovery air-conditioning outdoor system 1 also comprises a refrigerant recovery module 14;
the indoor system 2 comprises a gaseous refrigerant conveying pipeline 21, a liquid refrigerant conveying pipeline 22 and at least two indoor modules 23 connected in parallel, wherein the gaseous refrigerant conveying pipeline 21 comprises a gaseous refrigerant input pipeline 211 and a gaseous refrigerant output pipeline 212, and each indoor module 23 can be communicated with the gaseous refrigerant input pipeline 211, the gaseous refrigerant output pipeline 212 and the liquid refrigerant conveying pipeline 22;
the gaseous refrigerant input pipeline 211 can be communicated with the refrigerant output module 11, the gaseous refrigerant output pipeline 212 can be communicated with the refrigerant recovery module 14, and the liquid refrigerant conveying pipeline 22 can be communicated with the heat exchange module 12.
As a preferred or alternative embodiment, each indoor module 23 includes an indoor unit 231, an indoor high-pressure solenoid valve 232, and an indoor low-pressure solenoid valve 233;
the indoor unit 231 is respectively communicated with the liquid refrigerant conveying pipeline 22 and the gaseous refrigerant conveying pipeline 21, the indoor high-pressure electromagnetic valve 232 is arranged on the gaseous refrigerant input pipeline 211, and the indoor low-pressure electromagnetic valve 233 is arranged on the gaseous refrigerant output pipeline 212;
the continuous heating heat recovery air-conditioning outdoor system 1 comprises a temperature control module 13, wherein the temperature control module 13 comprises a high-pressure pipeline 131 and a low-pressure pipeline 132, and two ends of the high-pressure pipeline 131 can be respectively communicated with a refrigerant output module 11 and a gaseous refrigerant input pipeline 211; the two ends of the low pressure pipeline 132 can be respectively communicated with the refrigerant recovery module 14 and the gaseous refrigerant output pipeline 212.
Specifically, an indoor expansion valve 234 is further connected to the indoor module 23, and the connection manner and function of the indoor expansion valve 234 are similar to those of the heat exchange expansion valve 123; the gaseous refrigerant input pipeline 211 can be communicated with the refrigerant output module 11 through the high-pressure pipeline 131, so that the gaseous refrigerant output by the refrigerant output module 11 can enter the indoor module 23 through the gaseous refrigerant input pipeline 211 to realize a heating function; the gaseous refrigerant output pipeline 212 can be communicated with the refrigerant recovery module 14 through the low-pressure pipeline 132, so that the refrigerant circulating through the indoor module 23 can enter the refrigerant recovery module 14 through the gaseous refrigerant output pipeline 212, and then enters the next cycle after gas-liquid separation; the liquid refrigerant conveying pipeline 22 can be communicated with the heat exchange module 12, so that the liquid refrigerant passing through the heat exchange module 12 can enter the indoor module 23 for refrigeration, or the refrigerant flowing out of the indoor module 23 can flow through the heat exchange module 12 and then enter the refrigerant recovery module 14, and then enters the next cycle after gas-liquid separation.
The use method of the heat recovery air conditioner provided by the embodiment of the invention comprises the following modes:
a full cooling mode: each four-way valve 122 is in a power-off state, so that the refrigerant output module 11 is communicated with each heat exchanger 121, each indoor low-pressure solenoid valve 233 is opened, each indoor high-pressure solenoid valve 232 is closed, the outdoor high-pressure solenoid valve 133 and the outdoor low-pressure solenoid valve 134 are closed, and each heat exchange expansion valve 123 is opened;
specifically, the operation principle is as shown in fig. 2, a solid arrow indicates a refrigerant flowing direction, warm and high-pressure refrigerant gas is output by the refrigerant output module 11, a plurality of branches are branched to flow through the four-way valves 122 and the heat exchangers 121, the refrigerant gas passes through the different heat exchangers 121 to become medium-pressure refrigerant liquid, the medium-pressure refrigerant liquid is converged and then flows through the supercooling module 15 to enter the indoor system 2, a plurality of branches flow out of the indoor system 2 to enter the indoor modules 23 through the liquid refrigerant conveying pipeline 22, the liquid refrigerant flows through the indoor unit 231 to cool the indoor to become low-temperature and low-pressure gaseous refrigerant or gas-liquid mixture, the low-pressure refrigerant gas-liquid mixture enters the low-pressure pipeline 132 through the opened indoor low-pressure solenoid valve 233, and finally the refrigerant gas.
A main body refrigeration mode: the indoor cold requirement to be refrigerated is greater than the indoor heat requirement to be heated; each four-way valve 122 is in a power-off state, so that the refrigerant output module 11 is communicated with each heat exchanger 121, an indoor low-pressure electromagnetic valve 233 in the indoor module 23 to be cooled and an indoor high-pressure electromagnetic valve 232 in the indoor module 23 to be heated are opened, an indoor high-pressure electromagnetic valve 232 in the indoor module 23 to be cooled and an indoor low-pressure electromagnetic valve 233 in the indoor module 23 to be heated are closed, an outdoor high-pressure electromagnetic valve 133 is opened, an outdoor low-pressure electromagnetic valve 134 is closed, and each heat exchange expansion valve 123 is opened;
specifically, the operation principle is as shown in fig. 3, a solid arrow indicates a refrigerant flowing direction in a cooling process, and a line arrow indicates a refrigerant flowing direction in a heating process; in this mode, the direction of the refrigerant flowing through the heat exchanger 121 and the indoor unit 231 is the same as in the complete cooling mode, except that the outdoor high-pressure solenoid valve 133 and the indoor high-pressure solenoid valve 232 in the indoor module 23 to be heated are in an open state, the indoor low-pressure solenoid valve 233 is in a closed state, the high-temperature high-pressure refrigerant gas is output from the refrigerant output module 11, except for a part of the high-temperature high-pressure refrigerant gas entering the heat exchange module 12, a part of the high-temperature high-pressure refrigerant gas enters the gaseous refrigerant input pipeline 211 through the open outdoor high-pressure solenoid valve 133, enters the indoor module 23 to be heated, becomes medium-pressure refrigerant liquid after passing through the indoor unit 231, enters the liquid refrigerant conveying pipeline 22 through the open indoor high-pressure solenoid valve 232, and is mixed.
Complete heating mode: each four-way valve 122 is in an electrified state, blocks the communication between the refrigerant output module 11 and each heat exchanger 121, opens each indoor high-pressure solenoid valve 232, closes each indoor low-pressure solenoid valve 233, opens the outdoor high-pressure solenoid valve 133, closes the outdoor low-pressure solenoid valve 134, and opens each heat exchange expansion valve 123;
specifically, the operation principle is as shown in fig. 4, and the line arrows indicate the flowing direction of the refrigerant in the heating process; high-temperature and high-pressure refrigerant gas is output by the refrigerant output module 11, enters the indoor system 2 through the opened outdoor high-pressure solenoid valve 133, flows out of a plurality of branches in the indoor system 2, enters each indoor module 23 through the gaseous refrigerant input pipeline 211, becomes medium-pressure refrigerant liquid after the gaseous refrigerant flows through the indoor unit 231 to heat the indoor space, sequentially flows through the liquid refrigerant conveying pipeline 22 and the supercooling module 15, enters the heat exchange module 12, flows through the heat exchanger 121 to become low-temperature and low-pressure gaseous refrigerant or gas-liquid mixture, is subjected to gas-liquid separation by the refrigerant recovery module 14 through the four-way valve 122, enters the refrigerant output module 11, and enters the next cycle.
Main body heating mode: the indoor heat requirement needing to be heated is greater than the indoor cold requirement needing to be refrigerated; each four-way valve 122 is in an electrified state, the communication between the refrigerant output module 11 and each heat exchanger 121 is blocked, an indoor low-pressure electromagnetic valve 233 in the indoor module 23 to be refrigerated and an indoor high-pressure electromagnetic valve 232 in the indoor module 23 to be heated are opened, an indoor high-pressure electromagnetic valve 232 in the indoor module 23 to be refrigerated and an indoor low-pressure electromagnetic valve 233 in the indoor module 23 to be heated are closed, an outdoor high-pressure electromagnetic valve 133 is opened, an outdoor low-pressure electromagnetic valve 134 is closed, and each heat exchange expansion valve 123 is opened;
specifically, the operation principle is as shown in fig. 5, a solid arrow indicates a refrigerant flowing direction in the cooling process, and a line arrow indicates a refrigerant flowing direction in the heating process; in this mode, the direction of the refrigerant flowing through the heat exchanger 121 and the indoor unit 231 is the same as in the complete cooling mode, except that the outdoor high-pressure solenoid valve 133 and the indoor low-pressure solenoid valve 233 in the indoor module 23 to be cooled are in an open state, the indoor high-pressure solenoid valve 232 is in a closed state, the refrigerant passing through the indoor module 23 to be heated becomes medium-pressure refrigerant liquid, enters the indoor module 23 to be cooled through the liquid refrigerant conveying pipeline 22, passes through the indoor unit 231 to become low-temperature low-pressure gaseous refrigerant or a gas-liquid mixture, enters the gaseous refrigerant output pipeline 212 through the opened indoor low-pressure solenoid valve 233, passes through the low-pressure pipeline 132, is subjected to gas-liquid separation by the refrigerant recovery module 14, enters the refrigerant output module 11, and enters the next.
Full heat recovery mode: the indoor heat requirement needing to be heated is equal to the indoor cold requirement needing to be refrigerated; each four-way valve 122 is in an electrified state, the communication between the refrigerant output module 11 and each heat exchanger 121 is blocked, an indoor low-pressure electromagnetic valve 233 in the indoor module 23 to be refrigerated and an indoor high-pressure electromagnetic valve 232 in the indoor module 23 to be heated are opened, an indoor high-pressure electromagnetic valve 232 in the indoor module 23 to be refrigerated and an indoor low-pressure electromagnetic valve 233 in the indoor module 23 to be heated are closed, an outdoor high-pressure electromagnetic valve 133 is opened, an outdoor low-pressure electromagnetic valve 134 is closed, and each heat exchange expansion valve 123 is closed;
specifically, the operation principle is as shown in fig. 6, a solid arrow indicates a refrigerant flowing direction in the cooling process, and a line arrow indicates a refrigerant flowing direction in the heating process; in this mode, the refrigerant may form a complete cooling and heating system in the indoor system 2, and the heat exchange module 12 does not participate in the refrigerant cycle. The method specifically comprises the following steps: high-temperature and high-pressure refrigerant gas is output by the refrigerant output module 11 and enters the indoor system 2 through the opened outdoor high-pressure solenoid valve 133, a plurality of branches flow out of the indoor system 2 and enter each indoor module 23 needing heating through the gaseous refrigerant input pipeline 211, the gaseous refrigerant flows through the indoor unit 231 to heat the indoor space and then becomes medium-pressure refrigerant liquid and enters the liquid refrigerant conveying pipeline 22, a plurality of branches flow out of the liquid refrigerant conveying pipeline 22 and enters the indoor module 23 needing cooling, the liquid refrigerant flows through the indoor unit 231 to refrigerate the indoor space and then becomes high-temperature and high-pressure refrigerant gas and flows through the gaseous refrigerant input pipeline 211 to enter the indoor module 23 needing heating, and complete heat recovery is achieved through circulation.
Heating and defrosting mode: the four-way valve 122 connected to the heat exchanger 121 requiring defrosting is in a power-off state, the four-way valve 122 connected to the heat exchanger 121 not requiring defrosting is in a power-on state, each indoor high-pressure solenoid valve 232 is opened, each indoor low-pressure solenoid valve 233 is closed, the outdoor high-pressure solenoid valve 133 is opened, the outdoor low-pressure solenoid valve 134 is closed, and each heat exchange expansion valve 123 is opened.
Specifically, as shown in fig. 7, the operation principle is that when the heat exchanger 121 at the lower portion defrosts, a refrigerant flows through the direction, a line arrow indicates a refrigerant flowing through direction in a heating process, and an empty arrow indicates a refrigerant flowing through direction in a defrosting process; the flowing direction of the refrigerant between the indoor unit and the indoor system 2 is the same as the complete heating mode; what is different, after the high-temperature and high-pressure refrigerant gas is output by the refrigerant output module 11, a part of the high-temperature and high-pressure refrigerant gas enters the heat exchanger 121 at the lower part through the four-way valve 122 communicated with the heat exchanger 121 at the lower part, and is condensed by the heat exchanger 121 at the lower part and then is mixed with the refrigerant liquid entering the heat exchanger 121 at the upper part, so that defrosting of the heat exchanger 121 at the lower part is; fig. 8 shows a refrigerant flowing direction when the upper heat exchanger 121 defrosts, a part of the high-temperature and high-pressure refrigerant gas output by the refrigerant output module 11 enters the upper heat exchanger 121 through the four-way valve 122 communicated with the upper heat exchanger 121, and is condensed by the upper heat exchanger 121 and then mixed with the refrigerant liquid entering the lower heat exchanger 121, thereby defrosting the upper heat exchanger 121.
Any embodiment disclosed herein above is meant to disclose, unless otherwise indicated, all numerical ranges disclosed as being preferred, and any person skilled in the art would understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Since the numerical values are too numerous to be exhaustive, some of the numerical values are disclosed in the present invention to illustrate the technical solutions of the present invention, and the above-mentioned numerical values should not be construed as limiting the scope of the present invention.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
Meanwhile, if the invention as described above discloses or relates to parts or structural members fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connection (such as riveting and welding), of course, the mutual fixed connection can also be an integral structure (for example, the mutual fixed connection is manufactured by casting and integral forming instead (except that the integral forming process can not be adopted obviously).
In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated. Any part provided by the invention can be assembled by a plurality of independent components or can be manufactured by an integral forming process.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (6)
1. A continuous heating heat recovery air conditioner outdoor system is characterized by comprising a refrigerant output module and a heat exchange module; wherein the content of the first and second substances,
the heat exchange module comprises at least two heat exchangers connected in parallel, and the at least two heat exchangers are respectively communicated with the refrigerant output module through a four-way valve;
the continuous heating heat recovery air conditioner outdoor system also comprises a temperature control module, and two ends of the temperature control module can be respectively communicated with the refrigerant output module and an indoor system of an air conditioner;
the continuous heating heat recovery air conditioner outdoor system also comprises a refrigerant recovery module, and the output end of the refrigerant recovery module is communicated with the input end of the refrigerant output module;
the temperature control module comprises a high-pressure pipeline and a low-pressure pipeline, wherein an outdoor high-pressure electromagnetic valve is arranged on the high-pressure pipeline, and an outdoor low-pressure electromagnetic valve is arranged on the low-pressure pipeline;
two ends of the high-pressure pipeline can be respectively communicated with the refrigerant output module and an indoor system of an air conditioner; two ends of the low-pressure pipeline can be respectively communicated with the refrigerant recovery module and an indoor system of an air conditioner;
the refrigerant recovery module comprises a gas-liquid separator, and the circulated refrigerant enters the gas-liquid separator from the low-pressure pipeline, is separated and then enters the refrigerant output module to perform the next cycle;
the liquid refrigerant port of each heat exchanger is respectively communicated with a heat exchange expansion valve, and the outlet end of each heat exchange expansion valve is communicated with the liquid refrigerant port of the heat exchanger;
the continuous heating heat recovery air-conditioning outdoor system comprises the following modes:
a full cooling mode: each four-way valve is in a power-down state, so that the refrigerant output module is communicated with each heat exchanger, each indoor low-pressure electromagnetic valve is opened, each indoor high-pressure electromagnetic valve is closed, each outdoor high-pressure electromagnetic valve and each outdoor low-pressure electromagnetic valve are closed, and each heat exchange expansion valve is opened;
a main body refrigeration mode: the indoor cold requirement to be refrigerated is greater than the indoor heat requirement to be heated; each four-way valve is in a power-down state, so that the refrigerant output module is communicated with each heat exchanger, an indoor low-pressure electromagnetic valve in an indoor module to be refrigerated and an indoor high-pressure electromagnetic valve in an indoor module to be heated are opened, an indoor high-pressure electromagnetic valve in the indoor module to be refrigerated and an indoor low-pressure electromagnetic valve in the indoor module to be heated are closed, an outdoor high-pressure electromagnetic valve is opened, an outdoor low-pressure electromagnetic valve is closed, and each heat exchange expansion valve is opened;
complete heating mode: each four-way valve is in an electrified state, the refrigerant output module is blocked from being communicated with each heat exchanger, each indoor high-pressure electromagnetic valve is opened, each indoor low-pressure electromagnetic valve is closed, each outdoor high-pressure electromagnetic valve is opened, each outdoor low-pressure electromagnetic valve is closed, and each heat exchange expansion valve is opened;
main body heating mode: the indoor heat requirement needing to be heated is greater than the indoor cold requirement needing to be refrigerated; each four-way valve is in a power-on state, the refrigerant output module is blocked from being communicated with each heat exchanger, an indoor low-pressure electromagnetic valve in an indoor module to be refrigerated and an indoor high-pressure electromagnetic valve in an indoor module to be heated are opened, an indoor high-pressure electromagnetic valve in the indoor module to be refrigerated and an indoor low-pressure electromagnetic valve in the indoor module to be heated are closed, an outdoor high-pressure electromagnetic valve is opened, an outdoor low-pressure electromagnetic valve is closed, and each heat exchange expansion valve is opened;
full heat recovery mode: the indoor heat requirement needing to be heated is equal to the indoor cold requirement needing to be refrigerated; each four-way valve is in a power-on state, the refrigerant output module is blocked from being communicated with each heat exchanger, an indoor low-pressure electromagnetic valve in an indoor module to be refrigerated and an indoor high-pressure electromagnetic valve in an indoor module to be heated are opened, an indoor high-pressure electromagnetic valve in the indoor module to be refrigerated and an indoor low-pressure electromagnetic valve in the indoor module to be heated are closed, an outdoor high-pressure electromagnetic valve is opened, an outdoor low-pressure electromagnetic valve is closed, and each heat exchange expansion valve is closed;
heating and defrosting mode: the four-way valve connected with the heat exchanger needing defrosting is in a power-off state, the four-way valve connected with the heat exchanger not needing defrosting is in a power-on state, each indoor high-pressure electromagnetic valve is opened, each indoor low-pressure electromagnetic valve is closed, each outdoor high-pressure electromagnetic valve is opened, each outdoor low-pressure electromagnetic valve is closed, and each heat exchange expansion valve is opened.
2. The outdoor system of claim 1, wherein each of the four-way valves is capable of communicating with a low pressure line via a capillary tube.
3. The outdoor system of the air conditioner for continuous heating and heat recovery of claim 1, further comprising a supercooling module, wherein the supercooling module comprises a subcooler, and two ends of the supercooling module can communicate the heat exchange module and the indoor system of the air conditioner, respectively.
4. The outdoor system of claim 1, wherein the refrigerant output module comprises a compressor and an oil separator connected in series.
5. A heat recovery air conditioner comprising an indoor system and the outdoor system of the continuous heating heat recovery air conditioner of any one of claims 1 to 4; wherein the content of the first and second substances,
the continuous heating heat recovery air conditioner outdoor system also comprises a refrigerant recovery module;
the indoor system comprises a gaseous refrigerant conveying pipeline, a liquid refrigerant conveying pipeline and at least two indoor modules connected in parallel, wherein the gaseous refrigerant conveying pipeline comprises a gaseous refrigerant input pipeline and a gaseous refrigerant output pipeline, and each indoor module can be communicated with the gaseous refrigerant input pipeline, the gaseous refrigerant output pipeline and the liquid refrigerant conveying pipeline;
the gaseous refrigerant input pipeline can be communicated with the refrigerant output module, the gaseous refrigerant output pipeline can be communicated with the refrigerant recovery module, and the liquid refrigerant conveying pipeline can be communicated with the heat exchange module.
6. The heat recovery air conditioner of claim 5, wherein each of the indoor modules includes an indoor unit, an indoor high pressure solenoid valve, and an indoor low pressure solenoid valve;
the indoor unit is respectively communicated with a liquid refrigerant conveying pipeline and the gas refrigerant conveying pipeline, the indoor high-pressure electromagnetic valve is arranged on the gas refrigerant input pipeline, and the indoor low-pressure electromagnetic valve is arranged on the gas refrigerant output pipeline;
the continuous heating heat recovery air conditioner outdoor system comprises a temperature control module, the temperature control module comprises a high-pressure pipeline and a low-pressure pipeline, and two ends of the high-pressure pipeline can be respectively communicated with the refrigerant output module and the gaseous refrigerant input pipeline; and two ends of the low-pressure pipeline can be respectively communicated with the refrigerant recovery module and the gaseous refrigerant output pipeline.
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| CN111426100B (en) * | 2020-04-20 | 2021-08-24 | 珠海格力电器股份有限公司 | Automatic refrigeration heat recovery control method and device and multi-split complete machine equipment |
| CN112594986A (en) * | 2020-12-31 | 2021-04-02 | 广东积微科技有限公司 | Multi-split air conditioning system and refrigerant recovery control method thereof |
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| KR101013373B1 (en) * | 2003-08-28 | 2011-02-14 | 삼성전자주식회사 | Air Conditioner |
| CN102042648B (en) * | 2010-11-29 | 2012-10-03 | 青岛海信日立空调系统有限公司 | Heat recovery type multi-connection air condition unit |
| CN107110547B (en) * | 2015-01-13 | 2019-08-20 | 三菱电机株式会社 | Refrigerating circulatory device |
| CN104879852A (en) * | 2015-05-20 | 2015-09-02 | 广东志高暖通设备股份有限公司 | Three-pipe heat recovery multi-split air conditioner and outdoor unit thereof |
| CN107178833B (en) * | 2017-05-31 | 2023-12-05 | 珠海格力电器股份有限公司 | Heat recovery external machine system and air conditioning system |
| CN207299635U (en) * | 2017-09-19 | 2018-05-01 | 广东美的暖通设备有限公司 | For multi-line system outdoor unit and there is its multi-line system |
| CN108895584A (en) * | 2018-07-19 | 2018-11-27 | 广东志高暖通设备股份有限公司 | A kind of multiple heat pump circulating device that not shutting down defrost and promote heating capacity |
| CN109945330B (en) * | 2019-03-22 | 2019-12-24 | 珠海格力电器股份有限公司 | Refrigerating system capable of continuously heating and defrosting control method |
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