CN104748466A - Air source heat pump defrosting system - Google Patents
Air source heat pump defrosting system Download PDFInfo
- Publication number
- CN104748466A CN104748466A CN201310747920.5A CN201310747920A CN104748466A CN 104748466 A CN104748466 A CN 104748466A CN 201310747920 A CN201310747920 A CN 201310747920A CN 104748466 A CN104748466 A CN 104748466A
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- CN
- China
- Prior art keywords
- magnetic valve
- valve
- defrosting
- heat exchanger
- distributor
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
Abstract
The invention relates to an air source heat pump defrosting system and belongs to the technical field of heat pump defrosting system structures. The air source heat pump defrosting system comprises a full sealing compressor which is connected with a four-way reversing valve. The four-way reversing valve is connected with an evaporator. The other end of the evaporator is connected with a throttling device, and the other end of the throttling device is connected with a defrosting electromagnetic valve and a first heating electromagnetic valve in parallel. One end of the defrosting electromagnetic valve is connected with a finned heat exchanger, and the other end of the finned heat exchanger is connected with a three-way electromagnetic valve. The other two ends of the three-way electromagnetic valve are respectively connected with a first allocator and a second allocator, the other end of the second allocator is connected with a heating expansion valve, and the other end of the heating expansion valve is connected with a third allocator. According to the air source heat pump defrosting system, the refrigerant is circulated through two ways so that the compressor can complete the defrosting process under the normal operation state and the situations that the working condition and the heat amount do not change. Therefore, the air source heat pump defrosting system ensures the using of the compressor more reasonably, maintains the balance of the temperature and reasonably utilizes the resources.
Description
Technical field
The present invention relates to a kind of air source heat pump defrosting system, be the air source heat pump defrosting system of a kind of air-conditioner set application specifically, belong to heat pump to melt frost system architecture technical field.
Background technology
Net for air-source heat pump units, as the Cooling and Heat Source of air-conditioning system, due to features such as it are easy for installation, operation is simple, obtains considerable progress in recent years.But, the area that outside air temperature is lower in the winter time, humidity is larger, when finned tube surface temperature is lower than air dew point temperature, the steam in air just can condense, when this temperature is lower than 0 DEG C, condensation is just deposited in finned tube with the form of loose ice crystal and forms frost layer on the surface.Along with the progressive additive of frost layer, increase resistance when air flows through finned tube, reduce air mass flow, thus it is insufficient to cause finned tube inner refrigerant to evaporate, the problems such as evaporating temperature reduction, the minimizing of the evaporator outlet degree of superheat, heating capacity decay, refrigerant flow reduction occur, and will cause compressor accident time serious.
For this reason, existing solution is that net for air-source heat pump units is by cross valve commutation, employing reverse cycle defrosting.The new way of net for air-source heat pump units winter frost removing method, i.e. compressor shutdown, cross valve is transformed into refrigeration mode by heating mode, compressor is opened, source pump is transformed into present refrigeration mode by original heating mode and runs, outdoor heat exchanger becomes condenser by evaporimeter, the refrigerant vapour of the HTHP that compressor is discharged enters outdoor heat exchanger, its surface temperature is raised, frost layer is melted gradually and removes, so far defrosting mode terminates, source pump enters heat supply mode once again, compressor shutdown, cross valve commutates, compressor is opened, source pump is recovered heating mode and is run, defrost process terminates.From said process, in whole defrost process, cross valve twice commutation, compressor twice shutdown/start, source pump stops to air-conditioned room heat supply 5-10 minutes, causes fluctuate large, thermal comfort of room temperature to be difficult to ensure.
Summary of the invention
The object of the invention is to the deficiency solving the existence of above-mentioned prior art, a kind of air source heat pump defrosting system meeting heating demand while defrosting is provided.
A kind of air source heat pump defrosting system of the present invention, its special character is to comprise full envelope compressor i, the gas outlet of described full envelope compressor i is connected with four-way change-over valve h, wherein one end of four-way change-over valve h is connected with evaporimeter g, the other end of evaporimeter g is connected with the throttling arrangement f in parallel with heating magnetic valve two e-7, the other end of throttling arrangement f is connected with defrosting magnetic valve e and heats magnetic valve one e-6, one end of defrosting magnetic valve e is connected with finned heat exchanger k, the other end of finned heat exchanger k is connected with three-way magnetic valve a, the other two ends of three-way magnetic valve a are connected to distributor one b-1 be connected with four-way change-over valve h, with distributor two b-2 heating magnetic valve one e-6 and be connected, the other end of distributor two b-2 is connected with and heats expansion valve c, the other end heating expansion valve c is connected with distributor three b-3 be connected with finned heat exchanger k,
Described defrosting magnetic valve e has 5 to be connected with 5 three-way magnetic valve a respectively by finned heat exchanger k;
Described distributor three b-3 and finned heat exchanger k are connected with the check valve d matched with the magnetic valve e that defrosts;
The workflow of this defrosting system defrosting in winter comprises: the high temperature and high pressure gas that full envelope compressor i outlet is discharged flows through four-way change-over valve h, flow to condenser g, cold-producing medium in condenser g is divided into two-way, one tunnel is for heating magnetic valve one e-6, heat magnetic valve two e-7 to connect, refrigerant flow direction distributor two b-2, another road is that the road that in 5 defrosting magnetic valve e, temperature is minimum is opened, cold-producing medium directly enters finned heat exchanger k through defrosting magnetic valve e, the three-way magnetic valve a corresponding with defrosting magnetic valve e is flowed into through finned heat exchanger k, then the cold-producing medium flowing to distributor two b-2 Yu Shang mono-tunnel converges, cold-producing medium after converging enters and heats expansion valve c, flow through distributor three b-3, enter finned heat exchanger k, cold-producing medium out enters three-way magnetic valve a from finned heat exchanger k, entering distributor b-1, flow back to four-way change-over valve h, enter gas-liquid separator j, get back to the import of full envelope compressor i, complete arrangement cyclic process,
The workflow of this defrosting system cooling in summer comprises: the high temperature and high pressure gas that full envelope compressor i outlet is discharged flows through four-way change-over valve h, flow to distributor one b-1, three-way magnetic valve a is flowed to through distributor one b-1, three-way magnetic valve a all connects, enter finned heat exchanger k, defrosting magnetic valve e is out entered from finned heat exchanger k, defrosting magnetic valve e all connects, heat magnetic valve one e-6, heat magnetic valve two e-7 to close, entering throttling arrangement f, flow to condenser g, from condenser g out, flow through four-way change-over valve j, enter gas-liquid separator j, get back to the import of full envelope compressor i, complete arrangement cyclic process.
A kind of air source heat pump defrosting system of the present invention, cold-producing medium is divided into two-way and also follows, ensure compressor under normal operating conditions, operating mode is not changed and can be completed defrosting process by cold and hot with heat in nondecreasing situation, the more reasonable use that ensure that compressor, temperature keeps balance, reasonably make use of resource.
Accompanying drawing explanation
Fig. 1: schematic diagram of the present invention;
In figure: a, three-way magnetic valve, b-1, distributor one, b-2, distributor two, b-3, distributor three, c, heat expansion valve, d, check valve, e, defrosting magnetic valve, e-6, heat magnetic valve one, e-7, heat magnetic valve two, f, throttling arrangement, g, condenser, h, four-way change-over valve, i, seal compressor entirely, j, gas-liquid separator, k, finned heat exchanger.
Detailed description of the invention
Referring to accompanying drawing, provide the specific embodiment of the present invention, be used for being further described formation of the present invention.
Embodiment 1
A kind of air source heat pump defrosting system of the present embodiment, with reference to figure 1, comprise full envelope compressor i, the gas outlet of described full envelope compressor i is connected with four-way change-over valve h, wherein one end of four-way change-over valve h is connected with evaporimeter g, the other end of evaporimeter g is connected with the throttling arrangement f in parallel with heating magnetic valve two e-7, the other end of throttling arrangement f is connected with defrosting magnetic valve e and heats magnetic valve one e-6, one end of defrosting magnetic valve e is connected with finned heat exchanger k, the other end of finned heat exchanger k is connected with three-way magnetic valve a, the other two ends of three-way magnetic valve a are connected to distributor one b-1 be connected with four-way change-over valve h, with distributor two b-2 heating magnetic valve one e-6 and be connected, the other end of distributor two b-2 is connected with and heats expansion valve c, the other end heating expansion valve c is connected with distributor three b-3 be connected with finned heat exchanger k,
Described defrosting magnetic valve e has 5 to be connected with 5 three-way magnetic valve a respectively by finned heat exchanger k;
Described distributor three b-3 and finned heat exchanger k are connected with the check valve d matched with the magnetic valve e that defrosts;
The workflow of this defrosting system defrosting in winter comprises: the high temperature and high pressure gas that full envelope compressor i outlet is discharged flows through four-way change-over valve h, flow to condenser g, cold-producing medium in condenser g is divided into two-way, one tunnel is for heating magnetic valve one e-6, heat magnetic valve two e-7 to connect, refrigerant flow direction distributor two b-2, another road is that the road that in 5 defrosting magnetic valve e, temperature is minimum is opened, cold-producing medium directly enters finned heat exchanger k through defrosting magnetic valve e, the three-way magnetic valve a corresponding with defrosting magnetic valve e is flowed into through finned heat exchanger k, then the cold-producing medium flowing to distributor two b-2 Yu Shang mono-tunnel converges, cold-producing medium after converging enters and heats expansion valve c, flow through distributor three b-3, enter finned heat exchanger k, cold-producing medium out enters three-way magnetic valve a from finned heat exchanger k, entering distributor b-1, flow back to four-way change-over valve h, enter gas-liquid separator j, get back to the import of full envelope compressor i, complete arrangement cyclic process,
The workflow of this defrosting system cooling in summer comprises: the high temperature and high pressure gas that full envelope compressor i outlet is discharged flows through four-way change-over valve h, flow to distributor one b-1, three-way magnetic valve a is flowed to through distributor one b-1, three-way magnetic valve a all connects, enter finned heat exchanger k, defrosting magnetic valve e is out entered from finned heat exchanger k, defrosting magnetic valve e all connects, heat magnetic valve one e-6, heat magnetic valve two e-7 to close, entering throttling arrangement f, flow to condenser g, from condenser g out, flow through four-way change-over valve j, enter gas-liquid separator j, get back to the import of full envelope compressor i, complete arrangement cyclic process.
A kind of air source heat pump defrosting system of the present invention, cold-producing medium is divided into two-way and also follows, ensure compressor under normal operating conditions, operating mode is not changed and can be completed defrosting process by cold and hot with heat in nondecreasing situation, the more reasonable use that ensure that compressor, temperature keeps balance, reasonably make use of resource.
Claims (5)
1. an air source heat pump defrosting system, it is characterized in that comprising full envelope compressor (i), described full envelope compressor gas outlet is (i) connected with four-way change-over valve (h), wherein one end of four-way change-over valve (h) is connected with evaporimeter (g), the other end of evaporimeter (g) is connected with the throttling arrangement (f) in parallel with heating magnetic valve two (e-7), the other end of throttling arrangement (f) is connected with defrosting magnetic valve (e) and heats magnetic valve one (e-6), one end of defrosting magnetic valve (e) is connected with finned heat exchanger (k), the other end of finned heat exchanger (k) is connected with three-way magnetic valve (a), the other two ends of three-way magnetic valve (a) are connected to the distributor one (b-1) be connected with four-way change-over valve (h), with the distributor two (b-2) heating magnetic valve one (e-6) and be connected, the other end of distributor two (b-2) is connected with and heats expansion valve (c), the other end heating expansion valve (c) is connected with the distributor three (b-3) be connected with finned heat exchanger (k).
2. a kind of air source heat pump defrosting system according to claim 1, is characterized in that described defrosting magnetic valve (e) has 5 to be connected with 5 three-way magnetic valves (a) respectively by finned heat exchanger (k).
3. a kind of air source heat pump defrosting system according to claim 1, is characterized in that described distributor three (b-3) is connected with finned heat exchanger (k) check valve (d) matched with the magnetic valve (e) that defrosts.
4. a kind of air source heat pump defrosting system according to claim 1, the workflow of this system defrosting in winter comprises: the full envelope compressor high temperature and high pressure gas that (i) outlet is discharged flows through four-way change-over valve (h), flow to condenser (g), cold-producing medium in condenser (g) is divided into two-way, one tunnel is for heating magnetic valve one (e-6), heat magnetic valve two (e-7) to connect, refrigerant flow direction distributor two (b-2), another road is that the road that in 5 defrostings magnetic valve (e), temperature is minimum is opened, cold-producing medium directly enters finned heat exchanger (k) through defrosting magnetic valve (e), the three-way magnetic valve (a) corresponding with defrosting magnetic valve (e) is flowed into through finned heat exchanger (k), then the cold-producing medium flowing to distributor two (b-2) Yu Shang mono-tunnel converges, cold-producing medium after converging enters and heats expansion valve (c), flow through distributor three (b-3), enter finned heat exchanger (k), cold-producing medium out enters three-way magnetic valve (a) from finned heat exchanger (k), entering distributor (b-1), flow back to four-way change-over valve (h), enter gas-liquid separator (j), get back to the import (i) of full envelope compressor, complete arrangement cyclic process.
5. a kind of air source heat pump defrosting system according to claim 1, the workflow of this system cooling in summer comprises: the full envelope compressor high temperature and high pressure gas that (i) outlet is discharged flows through four-way change-over valve (h), flow to distributor one (b-1), three-way magnetic valve (a) is flowed to through distributor one (b-1), three-way magnetic valve (a) is all connected, enter finned heat exchanger (k), defrosting magnetic valve (e) is out entered from finned heat exchanger (k), defrosting magnetic valve (e) is all connected, heat magnetic valve one (e-6), heat magnetic valve two (e-7) to close, entering throttling arrangement (f), flow to condenser (g), from condenser (g) out, flow through four-way change-over valve (j), enter gas-liquid separator (j), get back to the import (i) of full envelope compressor, complete arrangement cyclic process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747920.5A CN104748466A (en) | 2013-12-31 | 2013-12-31 | Air source heat pump defrosting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747920.5A CN104748466A (en) | 2013-12-31 | 2013-12-31 | Air source heat pump defrosting system |
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| Publication Number | Publication Date |
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| CN104748466A true CN104748466A (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310747920.5A Pending CN104748466A (en) | 2013-12-31 | 2013-12-31 | Air source heat pump defrosting system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592437A (en) * | 2018-02-02 | 2018-09-28 | 北京中科华誉热泵设备制造有限公司 | A kind of air source heat pump that energy storage defrosts step by step |
| CN109442808A (en) * | 2018-11-16 | 2019-03-08 | 无锡同方人工环境有限公司 | Heat exchanger |
| CN112146299A (en) * | 2020-10-22 | 2020-12-29 | 长沙远大住宅工业集团股份有限公司 | Air conditioner defrosting system and method |
-
2013
- 2013-12-31 CN CN201310747920.5A patent/CN104748466A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592437A (en) * | 2018-02-02 | 2018-09-28 | 北京中科华誉热泵设备制造有限公司 | A kind of air source heat pump that energy storage defrosts step by step |
| CN109442808A (en) * | 2018-11-16 | 2019-03-08 | 无锡同方人工环境有限公司 | Heat exchanger |
| CN112146299A (en) * | 2020-10-22 | 2020-12-29 | 长沙远大住宅工业集团股份有限公司 | Air conditioner defrosting system and method |
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