CN103712381B - Air-conditioning system - Google Patents
Air-conditioning system Download PDFInfo
- Publication number
- CN103712381B CN103712381B CN201210378192.0A CN201210378192A CN103712381B CN 103712381 B CN103712381 B CN 103712381B CN 201210378192 A CN201210378192 A CN 201210378192A CN 103712381 B CN103712381 B CN 103712381B
- Authority
- CN
- China
- Prior art keywords
- low
- pressure tank
- air
- pipe
- conditioning system
- 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.)
- Active
Links
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The present invention is applicable to air-conditioning technical field, disclose a kind of air-conditioning system, comprise refrigerant circulation circuit, described refrigerant circulation circuit is connected with compressor, four-way change-over valve, outdoor heat exchanger, low-pressure tank, indoor machine, it is connected with muffler between described compressor and described low-pressure tank, it is connected with vapor pipe between described compressor and described outdoor heat exchanger, it is connected with cold medium main pipe road between low-pressure tank described in described indoor machine, being provided with interchanger in described low-pressure tank, described air-conditioning system also comprises the return line that part refrigerant can directly be back to compressor. Air-conditioning system provided by the present invention, it by setting up interchanger in low-pressure tank, it is possible to controls back gas enthalpy by controlling the switching time of return line, thus increases the cold medium flux of whole system, and then increases the refrigeration capacity of system; Without the need to arranging special supercooler, structure is simple, and application cost is low, the successful of energy efficiency.
Description
Technical field
The invention belongs to air-conditioning technical field, particularly relate to a kind of air-conditioning system.
Background technology
Current air-conditioning system, it is be made up of compressor, condenser, vaporizer and throttling element etc. as pressed compression type refrigerating system, closed system is formed according to being necessarily linked in sequence by pipeline, closed system fills appropriate refrigerant, under the effect of compressor, refrigeration agent out returns to compressor through condenser, vaporizer and throttle structure again from compressor, and heat is movement with the movement of refrigerant, it is achieved that absorb heat process of refrigeration to condenser heat release from vaporizer.
For improving the ability of refrigeration system, current common way is exactly strengthen evaporator-condenser and change the higher refrigeration compressor of efficiency, certainly will cause the increase of system cost like this, and the efficiency of whole system is not high yet.
In the entire system, the refrigerant temperature of one side after condenser condenses is still higher, also need to continue condensation to increase the cold of system, another aspect some refrigerant of refrigerant after evaporator evaporation does not evaporate completely, like this, it is difficult to be compressed due to liquid, it is possible to cause compressor to produce liquid hit phenomenon and damage compressor. If carrying out heat exchange to two portions in low-pressure tank, both having improve condensate depression and having also improved superheating temperature simultaneously, the efficiency of system is not high.
Low-pressure tank is given the two heat exchange, although improve condensate depression, also improve the superheating temperature of system, if but evaporator outlet absorbs too much heat, the refrigerant density that so compressor absorbs is little causes the internal circulating load of system just few, thus cause by the cold medium flux of vaporizer few, and cause the cold of system just little, the efficiency of system is not high.
Summary of the invention
It is an object of the invention to overcome above-mentioned the deficiencies in the prior art, it provides a kind of air-conditioning system, its efficiency height, and application cost is low.
The technical scheme of the present invention is: a kind of air-conditioning system, comprise refrigerant circulation circuit, described refrigerant circulation circuit is connected with compressor, four-way change-over valve, outdoor heat exchanger, low-pressure tank, indoor machine, it is connected with muffler between described compressor and described low-pressure tank, it is connected with vapor pipe between described compressor and described outdoor heat exchanger, it is connected with cold medium main pipe road between low-pressure tank described in described indoor machine, being provided with interchanger in described low-pressure tank, described air-conditioning system also comprises the return line that part refrigerant can directly be back to described compressor.
Can selection of land, described return line is provided with kapillary and recycle control valve.
Can selection of land, described low-pressure tank is provided with low-pressure tank inlet pipe and low-pressure tank and goes out pipe, described low-pressure tank is also provided with the interchanger inlet pipe being connected with described interchanger and interchanger and goes out pipe, described indoor machine is connected to one end that described interchanger goes out pipe and described four-way change-over valve, described muffler is connected to described low-pressure tank and goes out pipe, being connected with pipe connecting between described interchanger inlet pipe and described outdoor heat exchanger, described return line is connected to described pipe connecting and described muffler or low-pressure tank and goes out between pipe.
Specifically, described interchanger goes out and is provided with electric expansion valve on the pipeline between pipe with described indoor machine.
Specifically, described interchanger goes out and is provided with the first temperature sensor on the pipeline between pipe with described indoor machine, and described vapor pipe is provided with the first pressure transmitter; Described muffler is provided with the 2nd temperature sensor and the 2nd pressure transmitter; Described air-conditioning system also comprises controller, described controller is according to the temperature detected of the first temperature sensor and the first pressure transmitter, the actual condensate depression of calculation of pressure, and according to the temperature detected of the 2nd temperature sensor and the 2nd pressure transmitter, the actual superheating temperature of calculation of pressure, described controller controls described recycle control valve according to the difference between actual superheating temperature and target superheat degree and the difference between actual condensate depression and target condensate depression.
Specifically, described four-way change-over valve is connected to described vapor pipe, outdoor heat exchanger, indoor machine and described low-pressure tank inlet pipe.
Specifically, described recycle control valve is controlled by described controller by cycle time.
Specifically, in one-period �� T time, the control method of controller is as follows:
As (target condensate depression-actual condensate depression) > 5 DEG C, and (target superheat degree-actual superheating temperature) < 5 DEG C, described recycle control valve is opened and is closed the �� T second in 0 second;
As (target condensate depression-actual condensate depression) > 5 DEG C, and 5 DEG C��(target superheat degree-actual superheating temperature)��7 DEG C, described recycle control valve was opened for 1/3 �� T second and was closed for 2/3 �� T second;
When (target condensate depression-actual condensate depression)��5 DEG C, described recycle control valve is opened and is closed the �� T second in 0 second;
As (target superheat degree-actual superheating temperature) > 7 DEG C, described recycle control valve is opened the �� T second and is closed 0 second.
Preferably, described �� T is 3 to 60 seconds.
Preferably, described �� T is 30 seconds.
Air-conditioning system provided by the present invention, it by setting up interchanger in low-pressure tank, it is possible to controls back gas enthalpy by controlling the switching time of return line, thus increases the cold medium flux of whole system, and then increases the refrigeration capacity of system; Without the need to arranging special supercooler, structure is simple, and application cost is low, the successful of energy efficiency.
Accompanying drawing explanation
Fig. 1 is the connection diagram of the air-conditioning system that the embodiment of the present invention provides;
Fig. 2 is the front view of low-pressure tank in the air-conditioning system that provides of the embodiment of the present invention;
Fig. 3 is the left view of low-pressure tank in the air-conditioning system that provides of the embodiment of the present invention;
Fig. 4 is the vertical view of low-pressure tank in the air-conditioning system that provides of the embodiment of the present invention;
Fig. 5 is the pressure break figure that the air-conditioning system test that the embodiment of the present invention provides is formed.
Embodiment
In order to make the object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated. It is to be understood that specific embodiment described herein is only in order to explain the present invention, it is not intended to limit the present invention.
As shown in Figure 1, a kind of air-conditioning system that the embodiment of the present invention provides, comprises refrigerant circulation circuit, is provided with refrigerant in refrigerant circulation circuit. Refrigerant circulation circuit is connected with compressor 1, four-way change-over valve 2, outdoor heat exchanger 3, low-pressure tank 6, indoor machine (not shown), muffler 12 it is connected with between compressor 1 and low-pressure tank 6, it is connected with vapor pipe 13 between compressor 1 and outdoor heat exchanger 3, between indoor machine low-pressure tank 6, it is connected with cold medium main pipe road 14. Being provided with interchanger in low-pressure tank 6, air-conditioning system also comprises the return line 15 that part refrigerant can directly be back to compressor 1. By setting up interchanger in low-pressure tank 6, it is possible to carried out cold to refrigerant, and avoid superheating temperature too high, ensure the internal circulating load of refrigerant, it is to increase the efficiency of air-conditioning system. When return line 15 is opened, the part refrigerant that interchanger 3 place flows out outdoor can without low-pressure tank 6 but by flowing to compressor 1 after return line 15 reducing pressure by regulating flow, it is possible to it is invalid overheated to avoid, and is beneficial to the efficiency improving air-conditioning. When return line 15 is closed, the refrigerant that all interchanger outdoor 3 places flow out returns to indoor machine after cooling after entering low-pressure tank 6. Return line 15 can be in parallel to the cold medium main pipe road 14 of indoor machine with low-pressure tank 6. By the switch of recycle control valve 7 on return line 15 and switching time to obtain the cold of desirable air-conditioning system, thus ensure that air-conditioning system returns gas enthalpy within rational scope, do not need to arrange special supercooler, structure is simple, without the need to strengthening evaporator-condenser, also without the need to changing compressor 1, application cost is low, and energy-saving effect is obvious.
Specifically, return line 15 being provided with kapillary 5 and recycle control valve 7, it can be connected to muffler 12. When recycle control valve 7 is opened, the part refrigerant that interchanger 3 place flows out outdoor can without low-pressure tank 6 but by flowing to compressor 1 after kapillary 5 reducing pressure by regulating flow, it is possible to it is invalid overheated to avoid, and is beneficial to the efficiency improving air-conditioning. When recycle control valve 7 is closed, the refrigerant that all interchanger outdoor 3 places flow out returns to indoor machine after cooling after entering low-pressure tank 6.
Preferably, as shown in Figure 1, recycle control valve 7 is magnetic valve, and it is easy to control, reliability height.
Specifically, as shown in figures 1-4, low-pressure tank 6 is provided with low-pressure tank inlet pipe 61 and low-pressure tank goes out pipe 62, low-pressure tank 6 is also provided with the interchanger inlet pipe 63 being connected with interchanger and interchanger goes out pipe 64, indoor machine is connected to four-way change-over valve 3 one end by two cold medium main pipe roads 14 respectively and interchanger goes out pipe 64, muffler 12 is connected to low-pressure tank and goes out pipe 62, being connected with pipe connecting 16 between interchanger inlet pipe 63 and outdoor heat exchanger 3, return line 15 is connected to pipe connecting 16 and muffler 12 or low-pressure tank and goes out between pipe 62. Interchanger goes out and is provided with electric expansion valve 4 on the pipeline between pipe 64 and indoor machine. Specifically, four-way change-over valve 2 is connected to vapor pipe 13, outdoor heat exchanger 3, indoor machine and low-pressure tank inlet pipe 61. When air-conditioning system is freezed, the refrigerant of the low-temp low-pressure of machine conveying is compressed into the gaseous coolant of High Temperature High Pressure by compressor 1 indoor, now four-way change-over valve 2 falls electricity, high pressure refrigerant enters outdoor heat exchanger 3 to outdoor heat exchange by vapor pipe 13, if recycle control valve 7 is opened, in condensed high pressure temperature liquid refrigerants outdoor interchanger 3 two-way can be divided to flow out: after main refrigerant is not supercooled by low-pressure tank 6, through electric expansion valve 4 throttle after flow to indoor machine. Part bypass refrigerant returns to compressor 1 through recycle control valve 7, the cooling of kapillary 5 reducing pressure by regulating flow, it is not necessary to through low-pressure tank 6.
Specifically, as shown in figures 1-4, interchanger goes out to be provided with the first temperature sensor 9, first temperature sensor 9 on the pipeline between pipe 64 and indoor machine and also can be arranged at after recycle control valve 7 and kapillary 5, or is arranged at after 4 along the flow direction of refrigerant. Vapor pipe 13 is provided with the first pressure transmitter 11; Muffler 12 is provided with the 2nd temperature sensor 8 and the 2nd pressure transmitter 10; Air-conditioning system also comprises controller (not shown), controller is according to the temperature detected of the first temperature sensor 9 and the first pressure transmitter 11, the actual condensate depression of calculation of pressure, and according to the temperature detected of the 2nd temperature sensor 8 and the 2nd pressure transmitter 10, the actual superheating temperature of calculation of pressure, controller is according to the difference between actual superheating temperature and target superheat degree and the control recycle control valve 7 of the difference between actual condensate depression and target condensate depression. First temperature sensor 9, the 2nd temperature sensor 8, first pressure transmitter 11, the 2nd pressure transmitter 10 and recycle control valve 7 are all electrically connected on controller.
Specifically, as shown in figures 1-4, recycle control valve 7 is controlled by controller by cycle time. During refrigeration, by being arranged on compressor 1 vapor pipe 13, pressure measured by the first pressure transmitter 11, it is arranged on the first temperature sensor 9 after recycle control valve 7 and measures temperature, calculate via controller, and by the difference of target condensate depression (namely corresponding under the condition such as air-conditioning design temperature, pressure condensate depression value) and actual condensate depression (under the condition such as actual temperature, pressure the condensate depression value of correspondence), switching time in the recycle control valve 7 one-period time is controlled. And measure pressure by being arranged on the muffler 12 of compressor 1 the 2nd pressure transmitter 10, being arranged on the muffler 12 of compressor 1 the 2nd temperature sensor 8 measures temperature, calculate via controller, and by the difference of target superheat degree (namely corresponding under the condition such as air-conditioning design temperature, pressure super heat value) and actual superheating temperature (under the condition such as actual temperature, pressure the super heat value of correspondence), switching time in the recycle control valve 7 one-period time is controlled, reaching better energy-saving effect, it is to increase refrigerating duty. Time cycle time can determine according to practical situation.
Specifically, in one-period �� T time, the control method of controller is as follows:
As (target condensate depression-actual condensate depression) > 5 DEG C, and (target superheat degree-actual superheating temperature) < 5 DEG C, recycle control valve 7 is opened and is closed the �� T second in 0 second, namely recycle control valve 7 is closed always, and the refrigerant that all interchanger outdoor 3 places flow out returns compressor 1 by muffler 12 after entering low-pressure tank 6.
As (target condensate depression-actual condensate depression) > 5 DEG C, and 5 DEG C��(target superheat degree-actual superheating temperature)��7 DEG C, recycle control valve 7 was opened for 1/3 �� T second and was closed for 2/3 �� T second; Namely recycle control valve 7 opening time was 1/3 time cycle, the major part refrigerant that interchanger 3 place flows out outdoor returns compressor 1 by muffler 12 after entering low-pressure tank 6, and the small portion refrigerant that interchanger 3 place flows out outdoor can without low-pressure tank 6 but by flowing to compressor 1 after kapillary 5 reducing pressure by regulating flow.
When (target condensate depression-actual condensate depression)��5 DEG C, recycle control valve 7 is opened and is closed the �� T second in 0 second, and namely recycle control valve 7 is closed always, and the refrigerant that all interchanger outdoor 3 places flow out returns compressor 1 by muffler 12 after entering low-pressure tank 6.
As (target superheat degree-actual superheating temperature) > 7 DEG C, recycle control valve 7 is opened the �� T second and is closed 0 second, in the case, the part refrigerant that interchanger 3 place flows out outdoor can without low-pressure tank 6 but by flowing to compressor 1 after kapillary 5 reducing pressure by regulating flow, and more by flowing to the refrigerant of compressor 1 after kapillary 5 reducing pressure by regulating flow.
Preferably, �� T is 3 to 60 seconds.
More preferably, �� T is 30 seconds. Certainly, the time of �� T can according to practical situation, it is possible to is the numerical value that other is suitable.
As shown in Figure 5, it may be seen that the ability Q=M �� �� H of air-conditioning system in pressure break figure, make the big one side of ability be that the condensate depression of system is big and also to be made the mass rate of system big simultaneously. Condensate depression we can be undertaken cold by low-pressure tank 6, simultaneously owing to suction line absorbs heat in low-pressure tank 6, return air temperature degree is also high, so certainly will be just few by the flow of compressor 1, causing systemic circulation flow little, air-conditioning system provided by the present invention is exactly that the product by the two finds a maximum value.
As shown in Figure 5, in pressure break figure, it is possible to significantly finding out, it is to increase the condensate depression of system, the enthalpy difference of air-conditioning system significantly increases, become H1+H2 by H1. The outlet position enthalpy point of vaporizer also becomes A ' point by A point simultaneously, and specific volume has also become greatly, and the suction refrigerant quantitative change of compressor 1 has been lacked, and causes the internal circulating load of system to diminish. In order to address this problem, it is invalid overheated to avoid, and this air-conditioning system adds a magnetic valve and one section of kapillary 5, and it is invalid overheated to control, and the efficiency of system is promoted.
Air-conditioning system provided by the present invention, its by the switching time of return line 15 to obtain the condensate depression by low-pressure tank 6, also control back gas enthalpy by controlling the switching time of return line 15, to increase the cold medium flux of whole system thus to increase the ability of system simultaneously; Without the need to arranging special supercooler, simple and reasonable, successful.
These are only the better embodiment of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement or improvement etc. done within the spirit and principles in the present invention, all should be included within protection scope of the present invention.
Claims (7)
1. an air-conditioning system, comprise refrigerant circulation circuit, described refrigerant circulation circuit is connected with compressor, four-way change-over valve, outdoor heat exchanger, low-pressure tank, indoor machine, it is connected with muffler between described compressor and described low-pressure tank, it is connected with vapor pipe between described compressor and described outdoor heat exchanger, it is connected with cold medium main pipe road between low-pressure tank described in described indoor machine, it is characterized in that, being provided with interchanger in described low-pressure tank, described air-conditioning system also comprises the return line that part refrigerant can directly be back to described compressor; Described return line is in parallel to the cold medium main pipe road of described indoor machine with described low-pressure tank;
Described return line is provided with kapillary and recycle control valve;
Described low-pressure tank is provided with low-pressure tank inlet pipe and low-pressure tank and goes out pipe, described low-pressure tank is also provided with the interchanger inlet pipe being connected with described interchanger and interchanger and goes out pipe, described indoor machine is connected to one end that described interchanger goes out pipe and described four-way change-over valve, described muffler is connected to described low-pressure tank and goes out pipe, being connected with pipe connecting between described interchanger inlet pipe and described outdoor heat exchanger, described return line is connected to described pipe connecting and described muffler or low-pressure tank and goes out between pipe;
Described interchanger goes out and is provided with the first temperature sensor on the pipeline between pipe with described indoor machine, and described vapor pipe is provided with the first pressure transmitter; Described muffler is provided with the 2nd temperature sensor and the 2nd pressure transmitter; Described air-conditioning system also comprises controller, described controller is according to the temperature detected of the first temperature sensor and the first pressure transmitter, the actual condensate depression of calculation of pressure, and according to the temperature detected of the 2nd temperature sensor and the 2nd pressure transmitter, the actual superheating temperature of calculation of pressure, described controller controls described recycle control valve according to the difference between actual superheating temperature and target superheat degree and the difference between actual condensate depression and target condensate depression.
2. air-conditioning system as claimed in claim 1, it is characterised in that, described interchanger goes out and is provided with electric expansion valve on the pipeline between pipe with described indoor machine.
3. air-conditioning system as claimed in claim 2, it is characterised in that, described four-way change-over valve is connected to described vapor pipe, outdoor heat exchanger, indoor machine and described low-pressure tank inlet pipe.
4. air-conditioning system as claimed in claim 2, it is characterised in that, described recycle control valve is controlled by described controller by cycle time.
5. air-conditioning system as claimed in claim 4, it is characterised in that, in one-period �� T time, the control method of controller is as follows:
As (target condensate depression-actual condensate depression) > 5 DEG C, and (target superheat degree-actual superheating temperature) < 5 DEG C, described recycle control valve is opened and is closed the �� T second in 0 second;
As (target condensate depression-actual condensate depression) > 5 DEG C, and 5 DEG C��(target superheat degree-actual superheating temperature)��7 DEG C, described recycle control valve was opened for 1/3 �� T second and was closed for 2/3 �� T second;
When (target condensate depression-actual condensate depression)��5 DEG C, described recycle control valve is opened and is closed the �� T second in 0 second;
As (target superheat degree-actual superheating temperature) > 7 DEG C, described recycle control valve is opened the �� T second and is closed 0 second.
6. air-conditioning system as claimed in claim 5, it is characterised in that, described �� T is 3 to 60 seconds.
7. air-conditioning system as claimed in claim 6, it is characterised in that, described �� T is 30 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210378192.0A CN103712381B (en) | 2012-10-08 | 2012-10-08 | Air-conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210378192.0A CN103712381B (en) | 2012-10-08 | 2012-10-08 | Air-conditioning system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103712381A CN103712381A (en) | 2014-04-09 |
| CN103712381B true CN103712381B (en) | 2016-06-08 |
Family
ID=50405555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210378192.0A Active CN103712381B (en) | 2012-10-08 | 2012-10-08 | Air-conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103712381B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109764490A (en) * | 2019-01-21 | 2019-05-17 | 宁波奥克斯电气股份有限公司 | Air conditioner coolant supply state detection method, device and air-conditioning and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201517846U (en) * | 2009-09-03 | 2010-06-30 | 中山市高申节能电器有限公司 | Hydrojet enthalpy-increasing air source heat pump circulation/straight-flow type water heater |
| CN201837145U (en) * | 2010-07-15 | 2011-05-18 | 湖北东橙新能源科技有限公司 | Secondary compression heat pump system with economizer |
| CN102419038A (en) * | 2011-12-12 | 2012-04-18 | 广东美的暖通设备限公司 | Air conditioning system and control method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7997091B2 (en) * | 2004-04-22 | 2011-08-16 | Carrier Corporation | Control scheme for multiple operating parameters in economized refrigerant system |
| US7584625B2 (en) * | 2005-10-21 | 2009-09-08 | Emerson Climate Technologies, Inc. | Compressor capacity modulation system and method |
-
2012
- 2012-10-08 CN CN201210378192.0A patent/CN103712381B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201517846U (en) * | 2009-09-03 | 2010-06-30 | 中山市高申节能电器有限公司 | Hydrojet enthalpy-increasing air source heat pump circulation/straight-flow type water heater |
| CN201837145U (en) * | 2010-07-15 | 2011-05-18 | 湖北东橙新能源科技有限公司 | Secondary compression heat pump system with economizer |
| CN102419038A (en) * | 2011-12-12 | 2012-04-18 | 广东美的暖通设备限公司 | Air conditioning system and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103712381A (en) | 2014-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101776308B (en) | Energy-saving air conditioner | |
| CN104515318B (en) | Air conditioning system | |
| CN104315742A (en) | Electric automobile air conditioning heat pump system with economizer and control method thereof | |
| CN107178924A (en) | A kind of accumulation of heat is not shut down except defrosting system and air-conditioning | |
| CN203605512U (en) | Air-cooling type compression condensing unit with supercooled gas-liquid separator | |
| CN204438396U (en) | There is the air-conditioner set of accumulation of energy function | |
| CN205718075U (en) | A kind of air energy heat pump | |
| CN106705494A (en) | Air source heat pump energy conservation system with function of preventing air side heat exchanger from freezing | |
| CN112728800A (en) | Air conditioner | |
| CN203550270U (en) | Air conditioning system | |
| CN106766332A (en) | Air conditioning system unit and air conditioning system | |
| CN103712381B (en) | Air-conditioning system | |
| CN202267274U (en) | Ultralow-temperature air source heat pump | |
| CN202303718U (en) | Ice storage system of ice storage multi-connected air-conditioning unit | |
| KR101324314B1 (en) | Hot water manufacturing and Heat pump system | |
| CN201897345U (en) | Triple condensing device for marine air conditioner | |
| CN214249789U (en) | Multi-split air conditioner | |
| CN207501480U (en) | A kind of low temperature frequency conversion increasing enthalpy air-cooled heat pump unit | |
| CN210663485U (en) | Thermal fluorination defrosting system for refrigerating system and refrigerating system | |
| CN211261344U (en) | Continuous heating defrosting-free air conditioner | |
| CN210832607U (en) | Air conditioner | |
| CN114909725A (en) | High-efficiency energy-saving multi-split system | |
| CN101639310A (en) | Hot-gas bypass and surface cooler supercooling defrosting device | |
| CN107477913A (en) | Direct expanding solar heating pump system and its control method | |
| KR101118137B1 (en) | Air cooling type heat pump system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |