CN115265023A - Air source heat pump and thin frost removal control method thereof - Google Patents
Air source heat pump and thin frost removal control method thereof Download PDFInfo
- Publication number
- CN115265023A CN115265023A CN202210735231.1A CN202210735231A CN115265023A CN 115265023 A CN115265023 A CN 115265023A CN 202210735231 A CN202210735231 A CN 202210735231A CN 115265023 A CN115265023 A CN 115265023A
- Authority
- CN
- China
- Prior art keywords
- working medium
- pipeline
- defrosting
- heat exchanger
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005057 refrigeration Methods 0.000 claims abstract description 136
- 238000010257 thawing Methods 0.000 claims abstract description 124
- 239000007788 liquid Substances 0.000 claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 230000001105 regulatory effect Effects 0.000 claims description 18
- 239000003507 refrigerant Substances 0.000 claims description 17
- 230000001276 controlling effect Effects 0.000 claims description 9
- 238000001704 evaporation Methods 0.000 claims description 6
- 230000008020 evaporation Effects 0.000 claims description 6
- 230000003075 superhydrophobic effect Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 229920006395 saturated elastomer Polymers 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 description 18
- 238000004781 supercooling Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/06—Superheaters
-
- 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
-
- 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
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
-
- 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]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention relates to an air source heat pump and a thin frost removal control method thereof, wherein the air source heat pump comprises: the conventional air conditioner refrigeration working medium loop is provided with a refrigeration mode and a heating mode and comprises a compressor, a first heat exchanger, a second heat exchanger, a four-way reversing valve, a gas-liquid separator, a liquid storage device and an electronic expansion valve; a recoverer is arranged below the first heat exchanger; the condensate water pipeline is connected with the air side of the first heat exchanger and is provided with an overflow pipe discharge recoverer; the defrosting refrigeration working medium pipeline is connected with the outlet of the compressor and the second end of the working medium side pipeline of the first heat exchanger; the defrosting refrigeration working medium pipeline is sequentially connected with the outlet of the liquid storage device, the inlet of the working medium coil, the outlet of the working medium coil and the inlet of the electronic expansion valve; and the control system controls the operation of the conventional air conditioner refrigeration working medium loop, the defrosting refrigeration working medium pipeline and the defrosting refrigeration working medium pipeline. The invention realizes that the air source heat pump reduces defrosting and defrosting time and energy consumption, keeps continuous and stable operation and improves operation energy efficiency in summer.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air source heat pump and a thin frost removal control method thereof.
Background
The air source heat pump can be applied to the fields of heating, drying, cultivation heating, industrial and agricultural heating and hot water supply and the like of families or large buildings, and is the most widely applied heat pump variety. However, the outdoor heat exchanger of the air source heat pump often frosts in winter, the grown frost layer is blocked in the fin gap of the heat exchanger, the heat exchange thermal resistance of the heat exchanger is increased, the heating capacity and the operation efficiency of the air source heat pump are reduced, or the air source heat pump cannot exchange heat to stop the machine, so that the comfort level of the indoor environment is inevitably influenced by the deterioration of the working condition. Therefore, a proper winter heating defrosting mode needs to be found, the frost layer can be removed while the continuous operation of the air source heat pump unit is not influenced, and the defrosting process consumes less energy.
In the prior art, during defrosting, a compressor is stopped, a four-way reversing valve is switched, reverse circulation is started, after defrosting is completed, the four-way reversing valve is switched again, and an air source heat pump is switched to normal heating operation. During defrosting, the thermal comfort of indoor environment cannot be guaranteed, the four-way reversing valve is switched twice in the process, the compressor also needs to be started and stopped twice, and the service lives of the four-way reversing valve and the compressor are seriously influenced. In the defrosting process, the frost layer of an air source heat pump outer machine is blocked, the frost layer is thick, the reverse cycle time is long, and the energy consumption required by thorough defrosting is large. Because the internal pressure is unstable and the variation amplitude is large in the process of switching the refrigeration cycle and the heating cycle by the refrigeration working medium, the time and the energy consumption of the defrosting process are further increased.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an air source heat pump and a thin frost removal control method thereof, aiming at reducing the time and energy consumption of defrosting and defrosting.
The technical scheme adopted by the invention is as follows:
the present application provides an air source heat pump, the air source heat pump includes:
the conventional air conditioner refrigeration working medium loop is provided with a refrigeration mode and a heating mode and comprises a compressor, a first heat exchanger, a second heat exchanger, a four-way reversing valve, a gas-liquid separator, a liquid storage device and an electronic expansion valve;
the four-way reversing valve is respectively connected with the outlet of the compressor, the inlet of the gas-liquid separator and the first ends of the working medium side pipelines of the two heat exchangers, the second ends of the working medium side pipelines of the two heat exchangers are respectively connected with the outlet of the electronic expansion valve and the inlet of the liquid storage device, and the outlet of the liquid storage device is connected with the inlet of the electronic expansion valve;
a recoverer is arranged below the first heat exchanger, a working medium coil is arranged in the recoverer, and the outside of the working medium coil is an air side;
the air-source heat pump further comprises:
the defrosting refrigeration working medium pipeline is connected with the outlet of the compressor and the second end of the working medium side pipeline of the first heat exchanger and is used for inputting part of high-temperature and high-pressure refrigeration working medium at the outlet of the compressor into the working medium side pipeline of the first heat exchanger in a heating mode so as to melt the thin frost on the working medium side pipeline and drop the thin frost into the recoverer;
the defrosting refrigeration working medium pipeline is sequentially connected with the outlet of the liquid storage device, the inlet of the working medium coil, the outlet of the working medium coil and the inlet of the electronic expansion valve, and is used for quickly melting the thin frost in the recoverer in a heating mode and outputting part of refrigeration working medium at the outlet of the liquid storage device to be supercooled and then inputting the supercooled refrigeration working medium into the electronic expansion valve in a refrigeration mode;
and the control system is used for controlling the operation of the conventional air conditioner refrigeration working medium loop, the defrosting refrigeration working medium pipeline and the defrosting refrigeration working medium pipeline.
The further technical scheme is as follows:
the control system comprises a fourth temperature sensor, a first temperature sensor, a pressure sensor, a third temperature sensor, a second temperature sensor and a main controller, wherein the fourth temperature sensor is arranged at an air inlet at the air side of the first heat exchanger, the first temperature sensor is arranged at the first end of the working medium side pipeline, the pressure sensor is arranged at the second end of the working medium side pipeline, the third temperature sensor is arranged at an inlet of the working medium coil pipe, the second temperature sensor is arranged at an outlet of the working medium coil pipe, and the main controller is arranged;
the main controller is used for analyzing the measured values of the sensors and judging:
whether a defrosting refrigeration working medium pipeline is communicated or not;
whether to cut off the defrosting refrigeration working medium pipeline;
whether a defrosting refrigeration working medium pipeline is communicated or not;
and whether the defrosting refrigeration working medium pipeline is cut off or not.
The executive component for controlling the operation of the defrosting refrigeration working medium pipeline comprises: the first electromagnetic valve is arranged on a connecting pipeline between the outlet of the liquid storage device and the inlet of the electronic expansion valve, the second electromagnetic valve is arranged on a connecting pipeline between the outlet of the liquid storage device and the inlet of the working medium coil, and the third electromagnetic valve is arranged on a connecting pipeline between the outlet of the working medium coil and the inlet of the electronic expansion valve.
The executive component for controlling the operation of the defrosting refrigeration working medium pipeline comprises an electronic regulating valve.
The air-source heat pump further comprises:
the condensed water tray is arranged below the second heat exchanger and used for collecting condensed water on the outer wall of the heat exchange tube of the second heat exchanger in a refrigeration mode;
and the condensate water conveying pipeline is connected with the condensate water disc and the recoverer and is used for discharging condensate water in the condensate water disc into the recoverer in a refrigeration mode so as to supercool the refrigeration working medium in the defrosting refrigeration working medium pipeline and realize high-temperature air heat exchange with the air side of the first heat exchanger through condensate water evaporation.
The air-source heat pump further comprises:
the first fan is positioned at an air outlet on the air side of the first heat exchanger;
the second fan is positioned at an air outlet on the air side of the second heat exchanger;
and the third fan is positioned on the air side of the recoverer.
And the recoverer is provided with a drain pipe and an overflow pipe, and the drain pipe is provided with a fourth electromagnetic valve.
The working medium side pipeline of the first heat exchanger is a finned tube with an ultra-low adhesion and ultra-hydrophobic coating; the working medium coil of the recoverer is provided with a super-hydrophobic surface.
The application also provides a thin frost removal control method of the air source heat pump, wherein a control system comprises a fourth temperature sensor, a first temperature sensor and a pressure sensor, the fourth temperature sensor is arranged at an air side air inlet of a first heat exchanger, the first temperature sensor is arranged at a first end of a working medium side pipeline, the pressure sensor is arranged at a second end of the working medium side pipeline, the third temperature sensor is arranged at an inlet of a working medium coil pipe, the second temperature sensor is arranged at an outlet of the working medium coil pipe, and a main controller;
the thin frost removal control method comprises the following steps:
when the conventional air conditioner refrigeration working medium loop is in a heating mode, the main controller analyzes the measured values of the sensors and controls the sensors as follows:
calculating corresponding saturated pressure of a refrigeration working medium according to the outdoor environment temperature, judging whether the pressure difference between the saturated pressure and the pressure value measured by the pressure sensor reaches a first set value, if so, communicating a defrosting refrigeration working medium pipeline, inputting a high-temperature and high-pressure refrigeration working medium at the outlet part of the compressor into a working medium side pipeline of the first heat exchanger, melting and dropping the frost on the working medium side pipeline into a recoverer, otherwise, not communicating;
judging whether the temperature value measured by the first temperature sensor reaches a second set value or not, if so, cutting off a defrosting refrigeration working medium pipeline, and finishing defrosting;
and after defrosting is finished, judging whether the temperature difference measured by the second temperature sensor and the third temperature sensor reaches a third preset value, if not, communicating a defrosting refrigeration working medium pipeline, and cutting off a pipeline between the outlet of the liquid storage device and the inlet of the electronic expansion valve so as to quickly melt thin frost in the recoverer until the temperature difference reaches the third preset value, and cutting off the defrosting refrigeration working medium pipeline.
The further technical scheme is as follows:
after the defrosting refrigeration working medium pipeline is communicated, the flow of a high-temperature and high-pressure refrigeration working medium at the outlet of the compressor in the defrosting refrigeration working medium pipeline is adjusted, and meanwhile, the opening degree of the electronic expansion valve is adjusted to reduce the flow of a low-temperature refrigerant into the first heat exchanger, so that the temperature of the working medium side pipeline of the first heat exchanger is increased to the temperature required by thin frost removal; and after the defrosting of the defrosting refrigeration working medium pipeline is cut off, the opening of the electronic expansion valve is adjusted to be in a normal state before adjustment.
The invention has the following beneficial effects:
the invention has the advantages of short defrosting time, low defrosting energy consumption, short defrosting time and low defrosting energy consumption, and the normal heating operation of the air source heat pump is not influenced in the defrosting and frosting process, so that the indoor thermal comfort can be kept. The refrigerating condition in summer can recycle the cold energy of the condensed water generated by the indoor heat exchanger, the refrigerating performance coefficient can be improved, and the energy consumption is reduced. The specific technical effects are as follows:
firstly, the energy efficiency improvement of the refrigeration working condition in summer can be met, the energy consumption is saved, the continuous operation of the heating working condition in winter can also be met, and the defrosting mode based on thin frost removal is utilized to reduce the defrosting and defrosting time and the required energy consumption. The condensed water evaporation and heat absorption of the second heat exchanger is utilized in summer to reduce the ambient temperature of the air side of the first heat exchanger, the heat exchange efficiency of the first heat exchanger is improved, a high-temperature refrigerating working medium at the outlet of the liquid storage device is supercooled, the energy efficiency of the novel air source heat pump is improved, and the energy consumption is saved. In the defrosting process in winter, the heat of a refrigerating working medium at the outlet of the compressor is utilized, and because the surface of the first heat exchanger is a super-hydrophobic surface, a frost layer can be easily removed without suspending the air source heat pump to change the operation mode. In the defrosting process, the heat of the refrigerating working medium outlet of the liquid storage device is utilized to quickly discharge defrosting water.
Secondly, in the defrosting process in winter, the characteristic that the thin frost process is enhanced to heat exchange is utilized, the thin frost is removed within a certain proportion of time when the heat exchange performance is reduced, and the energy consumption increase caused by the rapid reduction of the performance of the air source heat pump increased by a frost layer in the later period is avoided. At the moment, the super-hydrophobic surface of the first heat exchanger has small adhesive force, a frost layer with a thin thickness can quickly fall off by only a small amount of steam heat at the outlet of the compressor, and the surface is kept dry. The defrosting process needs less heat, the defrosting time is shorter, and the continuous operation of the air source heat pump is not influenced.
Thirdly, the recoverer is used as a dual-purpose component, the cold energy of condensed water can be recovered in summer, the heat of the first heat exchanger is evaporated and absorbed, the air side temperature of the first heat exchanger is reduced, a high-temperature refrigerating working medium is at the outlet of the supercooling liquid storage device, the energy efficiency of the air source heat pump is improved, and energy is saved. As the defrosting device in winter, the defrosting device can quickly discharge defrosting water and keep the internal environment dry, greatly shortens defrosting time, reduces defrosting energy consumption, and quickly constructs a first heat exchanger air side drying environment.
Fourthly, the air source heat pump utilizes part of refrigerating working medium at the outlet of the compressor in the defrosting process, the heating process is not stopped, the air source heat pump does not need to change the circulation mode, heat can be continuously conveyed indoors, and the defrosting process is short in time, fast in defrosting process and small in influence on the heating circulation of the air source heat pump. Compared with the traditional defrosting mode, the energy can be saved more quickly, and the indoor thermal comfort is ensured.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a flow chart of an air source heat pump system according to an embodiment of the present invention.
Fig. 2 is a control flow chart of an air source heat pump thin frost removal control method according to an embodiment of the invention.
In the figure: 1. a compressor; 2. a first heat exchanger; 3. a second heat exchanger; 4. a first fan; 5. a recoverer; 51. a working medium coil pipe; 6. a gas-liquid separator; 7. a reservoir; 8. an electronic expansion valve; 9. a four-way reversing valve; 10. a water pump; 11. a drain pipe; 12. an overflow pipe; 13. a second fan; 14. a third fan;
151. a first solenoid valve; 152. a second solenoid valve; 153. a third electromagnetic valve; 154. a fourth solenoid valve;
161. a first check valve; 162. a second one-way valve; 163. a third check valve; 164. a fourth check valve;
17. an electronic regulating valve; 18. a condensate pan; 19. a pressure sensor;
201. a first temperature sensor; 202. a second temperature sensor; 203. a third temperature sensor; 204. and a fourth temperature sensor.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
Referring to fig. 1, an embodiment of the present application provides an air-source heat pump, including:
the conventional air conditioner refrigeration working medium loop has a refrigeration mode and a heating mode and comprises a compressor 1, a first heat exchanger 2, a second heat exchanger 3, a four-way reversing valve 9, a gas-liquid separator 6, a liquid reservoir 7 and an electronic expansion valve 8;
the four-way reversing valve 9 is respectively connected with the outlet of the compressor 1, the inlet of the gas-liquid separator 6 and the working medium sides of the two heat exchangersPipelineFirst end connected to working medium side of two heat exchangersPipelineThe second end is respectively connected with the outlet of the electronic expansion valve 8 and the inlet of the liquid storage device 7, and the outlet of the liquid storage device 7 is connected with the inlet of the electronic expansion valve 8;
a recoverer 5 is arranged below the first heat exchanger 2, and a working medium coil 51 is arranged in the recoverer;
further comprising:
the defrosting refrigeration working medium pipeline is connected with the outlet of the compressor 1 and the second end of the working medium side pipeline of the first heat exchanger 2 and is used for inputting part of high-temperature and high-pressure refrigeration working medium (steam) at the outlet of the compressor 1 into the working medium side pipeline of the first heat exchanger 2 in a heating mode so as to melt and drop thin frost on the working medium side pipeline into the recoverer 5;
the defrosting refrigeration working medium pipeline is sequentially connected with an outlet of the liquid storage device 7, an inlet of the working medium coil 51, an outlet of the working medium coil 51 and an inlet of the electronic expansion valve 8, and is used for quickly melting thin frost in the recoverer 5 in the heating mode, outputting a part of refrigeration working medium at the outlet of the liquid storage device 7 in the heating mode, supercooling the refrigerant and inputting the refrigerant into the electronic expansion valve 8;
and the control system is used for controlling the operation of the conventional air conditioner refrigeration working medium loop, the defrosting refrigeration working medium pipeline and the defrosting refrigeration working medium pipeline.
In the above embodiment, the control system includes a fourth temperature sensor 204 respectively disposed at the air inlet of the air side of the first heat exchanger 2, a first temperature sensor 201 at the first end of the working medium side pipeline, a pressure sensor 19 at the second end of the working medium side pipeline, a third temperature sensor 203 respectively disposed at the inlet of the working medium coil of the recoverer 5, a second temperature sensor 202 at the outlet of the working medium coil, and a main controller. Each sensor can transmit measured data to the main controller, and the main controller is used for analyzing the measured value of each sensor and judging:
whether a defrosting refrigeration working medium pipeline is communicated or not;
whether the defrosting refrigeration working medium pipeline is cut off or not;
whether a defrosting refrigeration working medium pipeline is communicated or not;
and whether the defrosting refrigeration working medium pipeline is cut off or not.
Specifically, the executive component for controlling the connection or disconnection of the defrosting refrigeration working medium pipeline comprises: a first solenoid valve 151 arranged on a connecting pipeline between the outlet of the liquid storage device 7 and the inlet of the electronic expansion valve 8, a second solenoid valve 152 arranged on a connecting pipeline between the outlet of the liquid storage device 7 and the inlet of the working medium coil 51, and a third solenoid valve 154 arranged on a connecting pipeline between the outlet of the working medium coil 51 and the inlet of the electronic expansion valve 8.
In the above embodiment, the air-source heat pump further includes:
the condensed water tray 18 is arranged below the second heat exchanger 3 and is used for collecting condensed water on the outer wall of the heat exchange tube of the second heat exchanger 3 in a refrigeration mode;
and the condensed water conveying pipeline is connected with the condensed water disc 18 and the recoverer 5, a water pump 10 is arranged on the connecting pipeline, and the inlet position of the condensed water connected into the recoverer is higher than the position of the working medium coil 51.
The condensate water conveying pipeline is used for discharging condensate water in the condensate water disc 18 to the recoverer 5 in a refrigeration mode, supercooling of high-temperature refrigeration working media (part of the high-temperature refrigeration working media flowing out of the outlet of the liquid storage device 7) in the defrosting refrigeration working medium pipeline is achieved, and meanwhile heat exchange with high-temperature air on the air side of the first heat exchanger 2 is achieved through condensate water evaporation.
In the above embodiment, the structure of the actuator for controlling the connection or disconnection of the defrosting refrigerant pipeline includes the electronic regulating valve 17.
In the above embodiment, the air-source heat pump further includes:
the first fan 4 is positioned at an air outlet on the air side of the first heat exchanger 2;
the second fan 13 is positioned at an air outlet on the air side of the second heat exchanger 3;
and a third fan 14 located on the air side of the recuperator 5.
In the above embodiment, the first heat exchanger 2, the second heat exchanger 3 and the recoverer 5 are indirect contact heat exchangers.
Specifically, the first heat exchanger 2, the second heat exchanger 3 are preferably fin-tube heat exchangers, and the recuperator 5 is preferably a coil heat exchanger. The recoverer 5 is provided with a drain pipe 11 and an overflow pipe 12.
Specifically, the drain pipe 11 is located at the bottom of the air-side passage of the recovery unit 5, and the drain pipe 11 is provided with a fourth electromagnetic valve 154. The overflow pipe 12 is located at the upper part of the air side passage of the recovery unit 5, and if the condensed water is too much, the condensed water can be discharged.
In the above embodiment, the working medium side pipeline of the first heat exchanger 2 is a finned tube with an ultra-low adhesion and ultra-hydrophobic coating, so that the thin frost can quickly fall off, and the surface is kept dry.
In the above embodiment, working medium coil 51 of recuperator 5 has a superhydrophobic surface.
In the above embodiments, it can be understood by those skilled in the art that the specific connection structure of the conventional air conditioner refrigerant circuit includes:
the four-way reversing valve 9 is provided with a 9a end, a 9b end, a 9c end and a 9d end;
the first heat exchanger 2 is provided with a first end 2a of a working medium side pipeline and a second end 2b of the working medium side pipeline;
the second heat exchanger 3 is provided with a first end 3b of a working medium side pipeline and a second end 3a of the working medium side pipeline;
the working medium coil 51 of the recoverer 5 is provided with an inlet end 5a and an outlet end 5b;
the outlet of the gas-liquid separator 6 is connected with the inlet of the compressor 1, the outlet of the compressor 1 is connected with the end 9c, the end 9a is connected with the inlet of the gas-liquid separator 6, the end 9b is connected with the first end 2a of the working medium side pipeline, and the end 9d is connected with the first end 3b of the working medium side pipeline;
the second end 2b of the working medium side pipeline is connected with an inlet of the liquid storage device 7, and a fourth check valve 164 is arranged on the connecting pipeline;
the second end 2b of the working medium side pipeline is connected with the outlet of the electronic expansion valve 8, and a second check valve 162 is arranged on the connecting pipeline;
the second end 3a of the working medium side pipeline is connected with an inlet of the liquid storage device 7, and a third check valve 163 is arranged in the refrigerating working medium pipeline;
the second end 3a of the working medium side pipeline is connected with the outlet of the electronic expansion valve 8, and a first check valve 161 is arranged on the connecting pipeline;
the first heat exchanger 2 and the second heat exchanger 3 are respectively an outdoor heat exchanger and an indoor heat exchanger of the heat pump system during working.
The operation condition of the conventional air conditioner refrigeration working medium loop in the refrigeration mode can be seen in fig. 1, the dotted arrow in fig. 1 shows the flow direction of the refrigeration working medium under the working condition of the refrigeration mode, and the operation working condition is as follows:
the first solenoid valve 151, the second solenoid valve 152, and the third solenoid valve 153 are opened, the electronic control valve 17 and the fourth solenoid valve 154 are closed, and the first fan 4 at the air side outlet of the first heat exchanger 2 is opened.
The low-temperature low-pressure refrigeration working medium output from the first end 3b of the working medium side pipeline of the second heat exchanger 3 is input into a gas-liquid separator 6 through a four-way reversing valve 9, the low-temperature low-pressure refrigeration working medium steam after gas-liquid separation enters the compressor 1, the compressed high-temperature high-pressure refrigeration working medium steam is discharged from the outlet of the compressor 1, enters the first end 2a of the working medium side pipeline of the first heat exchanger 2 through the four-way reversing valve 9, is released and condensed into high-temperature high-pressure refrigeration working medium liquid in the first heat exchanger 2, enters the liquid storage device 7 through the fourth check valve 164, enters the electronic expansion valve 8 through the first electromagnetic valve 151 to be cooled and decompressed into low-temperature low-pressure two-phase refrigeration working medium, then enters the second end 3a of the working medium side pipeline of the second heat exchanger 3 through the first check valve 161, the low-temperature low-pressure refrigeration working medium is evaporated in the second heat exchanger 3 to be low-temperature low-pressure refrigeration working medium steam, and enters the gas-liquid separator 6 through the four-way reversing valve 9 after coming out from the first end 3b of the working medium side pipeline, and the separated refrigeration working medium steam enters the compressor 1 to be compressed, thereby completing refrigeration cycle in summer refrigeration mode.
The condensate water tray 18 is used for collecting condensate water on a working medium side pipeline of the second heat exchanger 3, the condensate water is conveyed into the recoverer 5 by the water pump 10, and the condensate water tray can be used for supercooling a high-temperature refrigeration working medium in a defrosting refrigeration working medium pipeline (part of the refrigeration working medium flowing out of an outlet of the liquid storage device 7 enters the electronic expansion valve 8 after being supercooled), so that the performance coefficient of the system is improved. Meanwhile, the condensed water in the recoverer 5 contacts with the high-temperature air on the air side in the first heat exchanger 2 through evaporation, so that the temperature of the air exchanging heat with the first heat exchanger 2 can be reduced, and the heat exchanging amount is increased.
Preferably, the third fan 14 is turned on to promote the evaporation and absorption of the condensed water to rapidly lower the ambient temperature around the first heat exchanger 2.
The operation condition of the conventional air conditioner refrigeration working medium loop in the heating mode can be seen in fig. 1, a solid arrow in fig. 1 shows the flowing direction of the refrigeration working medium in the heating mode, and the working conditions in the winter heating mode comprise a frostless heating working condition, a thin frosting working condition and a defrosting working condition.
When the frostless heating working condition is operated, the first electromagnetic valve 151 is opened, the second electromagnetic valve 152, the third electromagnetic valve 153 and the electronic regulating valve 17 are closed, namely, the defrosting refrigeration working medium pipeline and the defrosting refrigeration working medium pipeline do not work (are cut off). The compressor 1 compresses low-temperature low-pressure refrigeration working medium steam in the gas-liquid separator 6 into high-temperature high-pressure refrigeration working medium to be discharged, the high-temperature low-pressure refrigeration working medium steam enters the second heat exchanger 3 through the four-way reversing valve 9 and is provided with a first end 3b of a working medium side pipeline, the high-temperature high-pressure refrigeration working medium in the second heat exchanger 3 is contacted with indoor air to be condensed and released into high-temperature high-pressure refrigeration working medium liquid, the high-temperature high-pressure refrigeration working medium liquid enters the liquid storage device 7 from a second end 3a of the working medium side pipeline through the third check valve 163 and then enters the electronic expansion valve 8 through the first electromagnetic valve 151 to be cooled and depressurized, the low-temperature low-pressure refrigeration working medium at the outlet of the electronic expansion valve 8 enters a second end 2b of the working medium side pipeline of the first heat exchanger 2 through the second check valve 162. The low-temperature low-pressure two-phase refrigeration working medium is evaporated and absorbs heat in the first heat exchanger 2 to form low-temperature low-pressure refrigeration working medium steam, then the low-temperature low-pressure two-phase refrigeration working medium flows out of the first end 2b end of the working medium side pipeline and sequentially passes through the four-way reversing valve 9, the gas-liquid separator 6 and the compressor 1 to be compressed in the compressor 1, and frost-free heating circulation under working conditions in winter is completed.
When the thin frost is frosted, the operation condition is the same as that of the non-frosted heating condition, the difference is that under the condition, the refrigeration working medium in the first heat exchanger 2 exchanges heat with outdoor air, the air is cooled, part of water vapor in the air is condensed, frozen and frosted on the surface of the finned tube of the first heat exchanger 2, and then the air flows out of the first heat exchanger 2.
When the defrosting operation is performed, the electronic regulating valve 17, the second electromagnetic valve 152, the third electromagnetic valve 153 and the first electromagnetic valve 151 are opened, that is, the defrosting refrigeration working medium pipeline and the defrosting refrigeration working medium pipeline work (are communicated). High-temperature and high-pressure refrigeration working medium steam at the outlet of the compressor 1 enters the first heat exchanger 2 through the opening adjustment of the electronic regulating valve 17, the opening of the electronic expansion valve 8 is adjusted, the low-temperature refrigeration working medium is reduced to enter the first heat exchanger 2, the first fan 4 runs at a high speed, the surface temperature of the finned tube per se is controlled by emitting sensible heat and improving the internal pressure of the first heat exchanger 2, the temperature of the surface of the fin of the first heat exchanger 2 is increased, and a frost layer on the fin of the first heat exchanger 2 is melted and falls into the recoverer 5. When the temperature of the surface of the first heat exchanger 2 reaches the set temperature value, the electronic regulating valve 17 is closed, and the defrosting process is finished. After defrosting is finished, the electronic regulating valve 17 is closed, the first electromagnetic valve 151 is closed, the second electromagnetic valve 152 and the third electromagnetic valve 153 are opened, and the defrosting refrigeration working medium pipeline works (is communicated). At the moment, the high-temperature and high-pressure refrigerant liquid in the liquid storage device 7 enters the recoverer 5 to heat the fallen frost layer, the second fan 14 runs at a low speed, and the super-hydrophobic surface in the recoverer 5 quickly discharges defrosting water without drying the defrosting device 5 by distillation. The refrigerant releases heat and returns to the electronic expansion valve 8 through the third electromagnetic valve 153, when the temperature difference of the refrigerant at the inlet and the outlet of the recoverer 5 reaches a set value, the defrosting process is finished. After the defrosting is finished, the first electromagnetic valve 151 is opened, the second electromagnetic valve 152 and the third electromagnetic valve 153 are closed, so that the heating operation is performed under the frostless heating condition.
In the above embodiment, the recoverer 5 is located below the first heat exchanger 2, and the working condition of heating in winter is used as a "defrosting device", so that the frost layer falling from the first heat exchanger 2 can be melted and discharged, the drying environment of the operation process of the first heat exchanger 2 is kept, and the heat of the frost layer is sourced from the refrigerant supercooling heat emitted from the second heat exchanger 3. The refrigerating working condition of the recoverer 5 in summer is used as a 'condensed water cold energy recoverer', condensed water in the condensed water disc 18 enters the recoverer 5 through the water pump 10, the recovered cold energy comes from condensed water on the air side of the second heat exchanger 3, and the condensed water can exchange heat with a refrigerating working medium at a refrigerating working medium outlet of the liquid accumulator 7 to supercool the condensed water, so that the circulation performance coefficient is improved. While the condensed water evaporates below the first heat exchanger 2 to absorb its air-side heat quantity.
In the above embodiment, the refrigerant in the air source heat pump is one of an HFC refrigerant or an HC refrigerant.
Referring to fig. 2, an embodiment of the present application further provides a thin frost removal control method for an air source heat pump, including:
when the conventional air conditioner refrigeration working medium loop is in a heating mode, the main controller analyzes the measured values of all the sensors and controls the sensors as follows:
1. calculating the corresponding refrigerant saturation pressure Pa according to the outdoor environment temperature measured by the fourth temperature sensor 204, and judging the pressure value P measured by the pressure sensor 19 and Pa0Pressure difference Δ P = | Pa-P0If the pressure reaches a first set value (delta P set), if the pressure reaches the first set value, the electronic regulating valve 17 is opened, a defrosting refrigeration working medium pipeline is communicated, part of high-temperature and high-pressure refrigeration working medium at the outlet of the compressor 1 is input into a working medium side pipeline of the first heat exchanger 2, and thin frost on the working medium side pipeline is melted and falls into the recoverer 5; otherwise, the defrosting refrigeration working medium pipeline is not communicated;
specifically, according to the above judgment, when entering the defrosting mode, the frost layer on the surface of the first heat exchanger 2 has already passed through the thin frost stage favorable for surface heat exchange, and is in the stage where the heat exchange effect is steadily reduced, and the defrosting process time is short.
2. Determine the temperature value T measured by the first temperature sensor 201fAnd if the second set value is reached, closing the electronic regulating valve 17, cutting off the defrosting refrigeration working medium pipeline and finishing defrosting.
Specifically, the second set value is a temperature range [ T ]fl,Tfh]When the finned tube temperature value T measured by the first temperature sensor 201 is greater than the finned tube temperature value TfIn the temperature interval Tfl,Tfh]When the defrosting operation is finished, the electronic regulating valve 17 is closed.
3. The defrosting condition is started and the defrosting condition is closed as a signal, namely the defrosting condition is finished, and the temperature T measured by the second temperature sensor 202 is judged1The temperature T measured by the third temperature sensor 2032Difference Δ T = T1-T2Whether a third preset value (set at Δ T) is reached, and if not, turning on the second powerThe magnetic valve 152 and the third electromagnetic valve 153 are communicated with the defrosting refrigeration working medium pipeline, and the pipeline between the outlet of the liquid storage device 7 and the inlet of the electronic expansion valve 8 is cut off to rapidly melt the thin frost in the recoverer 5 until the temperature difference reaches a third preset value, the second electromagnetic valve 152 and the third electromagnetic valve 153 are closed, and the defrosting refrigeration working medium pipeline is cut off.
The thin frost removal control method of the above embodiment further includes:
after the electronic regulating valve 7 is opened to communicate the defrosting refrigeration working medium pipeline, the flow of the high-temperature and high-pressure refrigeration working medium at the outlet of the compressor 1 in the defrosting refrigeration working medium pipeline is controlled by regulating the opening degree of the electronic regulating valve 7, and meanwhile, the opening degree of the electronic expansion valve 8 is regulated to reduce the flow of low-temperature refrigerant into the first heat exchanger 2, so that the temperature of the working medium side pipeline of the first heat exchanger 2 is increased to the temperature required by thin frost removal.
After the electronic regulating valve 7 is closed and the defrosting refrigeration working medium pipeline is cut off, the electronic expansion valve 8 is regulated to be in a normal state before regulation.
The defrosting method and the defrosting device have important significance for reducing defrosting time and energy consumption of the air source heat pump, keeping the air source heat pump continuously and stably running and improving running energy efficiency in summer.
Those of ordinary skill in the art will understand that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An air-source heat pump, characterized in that the air-source heat pump comprises:
the conventional air conditioner refrigeration working medium loop is provided with a refrigeration mode and a heating mode and comprises a compressor (1), a first heat exchanger (2), a second heat exchanger (3), a four-way reversing valve (9), a gas-liquid separator (6), a liquid reservoir (7) and an electronic expansion valve (8);
the four-way reversing valve (9) is respectively connected with the outlet of the compressor (1), the inlet of the gas-liquid separator (6) and the working medium sides of the two heat exchangersPipe Road surfaceFirst ends of the two heat exchangers are connected, and working medium sides of the two heat exchangersPipelineThe second end is respectively connected with the outlet of the electronic expansion valve (8) and the inlet of the liquid storage device (7), and the outlet of the liquid storage device (7) is connected with the inlet of the electronic expansion valve (8);
a recoverer (5) is arranged below the first heat exchanger (2), a working medium coil (51) is arranged in the recoverer, and the outside of the working medium coil (51) is an air side;
the air-source heat pump further comprises:
a defrosting and refrigerating working medium pipeline connecting the outlet of the compressor (1) and the working medium side of the first heat exchanger (2)PipelineThe second end is used for inputting part of high-temperature and high-pressure refrigeration working medium at the outlet of the compressor (1) into a working medium side pipeline of the first heat exchanger (2) in a heating mode, so that the thin frost on the working medium side pipeline is melted and falls into the recoverer (5);
the defrosting refrigeration working medium pipeline is sequentially connected with the outlet of the liquid storage device (7), the inlet of the working medium coil pipe (51), the outlet of the working medium coil pipe (51) and the inlet of the electronic expansion valve (8), and is used for quickly melting the thin frost in the recoverer (5) in the heating mode and outputting a part of refrigeration working medium at the outlet of the liquid storage device (7) in the cooling mode to be supercooled and then input into the electronic expansion valve (8);
and the control system is used for controlling the operation of the conventional air conditioner refrigeration working medium loop, the defrosting refrigeration working medium pipeline and the defrosting refrigeration working medium pipeline.
2. The air-source heat pump according to claim 1, wherein the control system comprises a fourth temperature sensor (204) respectively arranged at an air inlet at the air side of the first heat exchanger (2), a first temperature sensor (201) at a first end of the working medium side pipeline, a pressure sensor (19) at a second end of the working medium side pipeline, a third temperature sensor (203) respectively arranged at an inlet of the working medium coil (51), a second temperature sensor (202) at an outlet of the working medium coil (51), and a main controller;
the main controller is used for analyzing the measured values of the sensors and judging:
whether a defrosting refrigeration working medium pipeline is communicated or not;
whether the defrosting refrigeration working medium pipeline is cut off or not;
whether a defrosting refrigeration working medium pipeline is communicated or not;
and whether the defrosting refrigeration working medium pipeline is cut off or not.
3. The air-source heat pump as claimed in claim 1, wherein the actuator for controlling the operation of the defrosting refrigerant circuit comprises: the electromagnetic valve comprises a first electromagnetic valve (151) arranged on a connecting pipeline between an outlet of the liquid storage device (7) and an inlet of the electronic expansion valve (8), a second electromagnetic valve (152) arranged on a connecting pipeline between an outlet of the liquid storage device (7) and an inlet of the working medium coil (51), and a third electromagnetic valve (154) arranged on a connecting pipeline between an outlet of the working medium coil (51) and an inlet of the electronic expansion valve (8).
4. An air-source heat pump according to claim 1, characterized in that the actuator for controlling the operation of the defrost refrigerant circuit comprises an electronic regulating valve (17).
5. The air-source heat pump of claim 1, further comprising:
the condensed water tray (18) is arranged below the second heat exchanger (3) and used for collecting condensed water on the outer wall of the heat exchange tube of the second heat exchanger (3) in a refrigeration mode;
and the condensate water conveying pipeline is connected with the condensate water disc (18) and the recoverer (5) and used for discharging condensate water in the condensate water disc (18) into the recoverer (5) in a refrigeration mode so as to supercool a refrigeration working medium in a defrosting refrigeration working medium pipeline and realize high-temperature air heat exchange with the air side of the first heat exchanger (2) through condensate water evaporation.
6. The air-source heat pump according to claim 1 or 5, further comprising:
the first fan (4) is positioned at an air outlet on the air side of the first heat exchanger (2);
the second fan (13) is positioned at an air outlet on the air side of the second heat exchanger (3);
and a third fan (14) located on the air side of the recuperator (5).
7. The air-source heat pump according to claim 1, wherein a drain pipe (11) and an overflow pipe (12) are provided on the recovery device (5), and a fourth electromagnetic valve (154) is provided on the drain pipe (11).
8. The air-source heat pump according to claim 1, characterized in that the working fluid side piping of the first heat exchanger (2) is a finned tube with an ultra-low adhesion and ultra-hydrophobic coating; the working medium coil (51) of the recoverer (5) is provided with a super-hydrophobic surface.
9. The thin frost removal control method of the air source heat pump according to claim 1, wherein the control system comprises a fourth temperature sensor (204) respectively arranged at an air inlet at the air side of the first heat exchanger (2), a first temperature sensor (201) at a first end of the working medium side pipeline, a pressure sensor (19) at a second end of the working medium side pipeline, a third temperature sensor (203) respectively arranged at an inlet of the working medium coil (51), a second temperature sensor (202) at an outlet of the working medium coil (51), and a main controller;
the thin frost removal control method comprises the following steps:
when the conventional air conditioner refrigeration working medium loop is in a heating mode, the main controller analyzes the measured values of the sensors and controls the sensors as follows:
calculating corresponding saturated pressure of a refrigeration working medium according to the outdoor environment temperature, judging whether the pressure difference between the saturated pressure and the pressure value measured by the pressure sensor (19) reaches a first set value, if so, communicating a defrosting refrigeration working medium pipeline, inputting a high-temperature high-pressure refrigeration working medium at the outlet part of the compressor (1) into a working medium side pipeline of the first heat exchanger (2), melting and dropping thin frost on the working medium side pipeline into the recoverer (5), otherwise, not communicating;
judging whether the temperature value measured by the first temperature sensor (201) reaches a second set value, if so, cutting off a defrosting refrigeration working medium pipeline, and finishing defrosting;
and after defrosting is finished, judging whether the temperature difference between the second temperature sensor (202) and the third temperature sensor (203) reaches a third preset value, if not, communicating the defrosting refrigeration working medium pipeline, and cutting off the pipeline between the outlet of the liquid storage device (7) and the inlet of the electronic expansion valve (8) to quickly melt the thin frost in the recoverer (5) until the temperature difference reaches the third preset value, and cutting off the defrosting refrigeration working medium pipeline.
10. The thin frost removal control method of the air-source heat pump according to claim 9, wherein after the defrosting refrigeration working medium pipeline is connected, the flow of the high-temperature and high-pressure refrigeration working medium at the outlet of the compressor (1) in the defrosting refrigeration working medium pipeline is adjusted, and the opening of the electronic expansion valve (8) is adjusted to reduce the flow of the low-temperature refrigerant into the first heat exchanger (2), so as to raise the temperature of the working medium side pipeline of the first heat exchanger (2) to the temperature required for thin frost removal; and after the defrosting of the defrosting refrigeration working medium pipeline is cut off, the opening of the electronic expansion valve (8) is adjusted to be in a normal state before adjustment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210735231.1A CN115265023A (en) | 2022-06-27 | 2022-06-27 | Air source heat pump and thin frost removal control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210735231.1A CN115265023A (en) | 2022-06-27 | 2022-06-27 | Air source heat pump and thin frost removal control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115265023A true CN115265023A (en) | 2022-11-01 |
Family
ID=83763783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210735231.1A Pending CN115265023A (en) | 2022-06-27 | 2022-06-27 | Air source heat pump and thin frost removal control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115265023A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900289A (en) * | 2014-04-17 | 2014-07-02 | 东南大学 | System and method for preventing air source heat pump water heater from frosting by using solid dehumidification |
| CN107576050A (en) * | 2017-10-24 | 2018-01-12 | 高风东 | A kind of condensate water circulatory system and its air-conditioning |
| CN107726536A (en) * | 2017-06-22 | 2018-02-23 | 青岛海尔空调器有限总公司 | Air-conditioning and its outdoor machine frost eliminating method |
| CN109469990A (en) * | 2018-10-08 | 2019-03-15 | 东南大学 | The air source heat pump and its working method with disengaged defroster based on super-hydrophobic finned heat exchanger |
| CN209819922U (en) * | 2019-04-04 | 2019-12-20 | 广东海悟科技有限公司 | Heat pump air conditioning system |
| CN212901960U (en) * | 2020-05-13 | 2021-04-06 | 上海中金能源投资有限公司 | Air conditioner condensate water secondary utilization system |
| CN114161911A (en) * | 2022-01-05 | 2022-03-11 | 珠海格力电器股份有限公司 | Refrigerator with a door |
-
2022
- 2022-06-27 CN CN202210735231.1A patent/CN115265023A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900289A (en) * | 2014-04-17 | 2014-07-02 | 东南大学 | System and method for preventing air source heat pump water heater from frosting by using solid dehumidification |
| CN107726536A (en) * | 2017-06-22 | 2018-02-23 | 青岛海尔空调器有限总公司 | Air-conditioning and its outdoor machine frost eliminating method |
| CN107576050A (en) * | 2017-10-24 | 2018-01-12 | 高风东 | A kind of condensate water circulatory system and its air-conditioning |
| CN109469990A (en) * | 2018-10-08 | 2019-03-15 | 东南大学 | The air source heat pump and its working method with disengaged defroster based on super-hydrophobic finned heat exchanger |
| CN209819922U (en) * | 2019-04-04 | 2019-12-20 | 广东海悟科技有限公司 | Heat pump air conditioning system |
| CN212901960U (en) * | 2020-05-13 | 2021-04-06 | 上海中金能源投资有限公司 | Air conditioner condensate water secondary utilization system |
| CN114161911A (en) * | 2022-01-05 | 2022-03-11 | 珠海格力电器股份有限公司 | Refrigerator with a door |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2017063321A1 (en) | Air source heat pump spray defrosting device based on super-hydrophobic finned tube heat exchanger | |
| CN109469990B (en) | Air source heat pump with separation type defrosting device based on super-hydrophobic fin heat exchanger and working method thereof | |
| US9945599B2 (en) | Air conditioner and control method thereof | |
| EP3388758A1 (en) | Heat-pump air conditioner | |
| CN100432583C (en) | Defrosting apparatus and method for air-source heat pump water chiller-heater unit | |
| CN103196262A (en) | Hot gas bypass defrosting device for air source heat pump water heater | |
| CN101644511A (en) | Parallel flow evaporator and anti-freezing method thereof | |
| CN104061727A (en) | Air source heat pump defrosting device based on fast evaporation of liquid drops in initial process of frosting | |
| CN100535550C (en) | Automobile heat pump air conditioner system | |
| CN212274312U (en) | Temperature control equipment | |
| CN106705515A (en) | Air conditioner system and air conditioner | |
| CN2886463Y (en) | Defrosting apparatus for air-source heat pump water chiller-heater unit | |
| CN115265023A (en) | Air source heat pump and thin frost removal control method thereof | |
| CN113776142A (en) | Heat pump type air conditioner refrigeration cycle system and control method thereof | |
| CN212457132U (en) | Split air conditioner | |
| CN212457497U (en) | Air conditioner using one-way valve | |
| CN108759156B (en) | Secondary throttling middle incomplete cooling two-stage compression heat pump system | |
| CN203489560U (en) | Dual-system heat pump defroster | |
| CN100381770C (en) | Heat pump type air conditioner having an improved defrosting structure and defrosting method for the same | |
| CN111578450A (en) | Air conditioning system and defrosting method thereof | |
| CN218210162U (en) | Air conditioning system | |
| CN219775883U (en) | Air Conditioning System | |
| CN113063237A (en) | Ultra-wide-loop temperature air source heat pump system and control method | |
| CN219640473U (en) | Air conditioning system | |
| CN216977263U (en) | Air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |