CN109900019B - Low-temperature air source heat pump - Google Patents
Low-temperature air source heat pump Download PDFInfo
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- CN109900019B CN109900019B CN201910119649.8A CN201910119649A CN109900019B CN 109900019 B CN109900019 B CN 109900019B CN 201910119649 A CN201910119649 A CN 201910119649A CN 109900019 B CN109900019 B CN 109900019B
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- heat
- compressor
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- liquid inlet
- liquid
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- 239000007788 liquid Substances 0.000 claims abstract description 84
- 238000005338 heat storage Methods 0.000 claims abstract description 34
- 230000008859 change Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 6
- 239000011232 storage material Substances 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 abstract description 8
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 238000010257 thawing Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000005057 refrigeration Methods 0.000 abstract description 2
- 238000009825 accumulation Methods 0.000 abstract 2
- 239000007787 solid Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The invention relates to the technical field of refrigeration and provides a low-temperature air source heat pump which comprises a heat storage device, wherein the heat storage device is arranged on the outer surface of a first compressor, a liquid outlet of the heat storage device is connected with a liquid inlet of a second compressor, a liquid outlet of the second compressor is connected with a liquid inlet of a first pipeline in an indoor heat exchanger, a liquid outlet of the first pipeline is connected with a liquid inlet of a first throttling device, and a liquid outlet of the first throttling device is connected with a liquid inlet of the heat storage device. Through the heat accumulation device arranged on the outer surface of the first compressor, the heat generated by the operation of the first compressor is absorbed, the heat is transferred to the first pipeline in the indoor heat exchanger for heat release after being compressed by the second compressor, the heat is provided for the indoor environment, the thermal comfort of the indoor environment is ensured, the refrigerant after heat release flows back to the heat accumulation device through the first throttling device for internal circulation operation, the comfort of the defrosting process of the heat pump is effectively improved, and the heating capacity of the heat pump is improved.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a low-temperature air source heat pump.
Background
When the outdoor environment temperature is lower in winter and the relative humidity is higher, the air source heat pump is operated under the frosting working condition frequently, the indoor temperature can be reduced to a certain extent when the heat pump is used for reverse circulation defrosting, the thermal comfort of the indoor environment is affected, and the air suction pressure, the air suction temperature and the heating quantity can be reduced when the heat pump is operated under the lower temperature until the heat pump system cannot continue to operate, so that the intensified heating also becomes the urgent requirement of the low-temperature air source heat pump.
Disclosure of Invention
The embodiment of the invention provides a low-temperature air source heat pump, which aims to solve the problems of low indoor temperature and poor heating capacity caused by defrosting in winter of the existing air source heat pump.
The embodiment of the invention provides a low-temperature air source heat pump, which comprises a heat storage device, wherein the heat storage device is arranged on the outer surface of a first compressor, a liquid outlet of the heat storage device is connected with a liquid inlet of a second compressor, a liquid outlet of the second compressor is connected with a liquid inlet of a first pipeline in an indoor heat exchanger, a liquid outlet of the first pipeline is connected with a liquid inlet of a first throttling device, and a liquid outlet of the first throttling device is connected with a liquid inlet of the heat storage device.
The heat storage device comprises a phase change heat accumulator which is embedded on the outer surface of the first compressor.
The phase change heat accumulator is filled with a heat accumulating material, and a heat accumulating coil is immersed in the heat accumulating material.
And a first gas-liquid separator is arranged on a connecting pipeline between the liquid outlet of the heat storage coil and the liquid inlet of the second compressor.
And an electromagnetic valve is arranged on a connecting pipeline between the liquid outlet of the second compressor and the liquid inlet of the first pipeline.
The liquid outlet of the first throttling device is connected with the liquid inlet of the heat storage coil.
The liquid outlet of the first compressor is connected with the liquid inlet of a second pipeline in the indoor heat exchanger, and the liquid outlet of the second pipeline is connected with the liquid inlet of a second throttling device.
The liquid outlet of the second throttling device is connected with the liquid inlet of the outdoor heat exchanger, and the liquid outlet of the outdoor heat exchanger is connected with the liquid inlet of the first compressor.
And a second gas-liquid separator is arranged on a connecting pipeline of the outdoor heat exchanger and the first compressor.
The phase change heat accumulator is provided with a filling port for filling heat accumulating materials into the phase change heat accumulator.
According to the low-temperature air source heat pump provided by the embodiment of the invention, the heat generated by the operation of the first compressor is absorbed through the heat storage device arranged on the outer surface of the first compressor, the heat is compressed by the second compressor and then is transmitted to the first pipeline in the indoor heat exchanger to release heat, the heat is provided for the indoor environment, the thermal comfort of the indoor environment is ensured, the released refrigerant flows back to the heat storage device through the first throttling device to circularly work, the comfort of the defrosting process of the heat pump is effectively improved, and the heating capacity of the heat pump is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a low-temperature air source heat pump according to an embodiment of the present invention.
In the figure, 1: a first compressor; 2: an indoor heat exchanger; 3: an outdoor heat exchanger; 4: a first throttle device; 5: a phase change heat accumulator; 6: a heat storage coil; 7: a first gas-liquid separator; 8: a second compressor; 9: an electromagnetic valve; 10: a first pipeline; 11: a second pipeline; 12: a second throttle device; 13: and a second gas-liquid separator.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality", "a plurality of groups" means two or more, and the meaning of "a plurality", "a plurality of roots", "a plurality of groups" means one or more.
As shown in fig. 1, an embodiment of the present invention provides a low-temperature air source heat pump, which includes a heat storage device, wherein the heat storage device is disposed on an outer surface of a first compressor 1, and is configured to absorb and store heat generated during an operation process of the first compressor 1. The liquid outlet of the heat storage device is connected with the liquid inlet of the second compressor 8, the liquid outlet of the second compressor 8 is connected with the liquid inlet of the first pipeline 10 in the indoor heat exchanger 2, the liquid outlet of the first pipeline 10 is connected with the liquid inlet of the first throttling device 4, and the liquid outlet of the first throttling device 4 is connected with the liquid inlet of the heat storage device.
Further, the heat storage device comprises a phase change heat accumulator 5, the phase change heat accumulator 5 is embedded on the outer surface of the first compressor 1, a heat storage material is filled in the phase change heat accumulator 5, and a heat storage coil 6 is immersed in the heat storage material. Specifically, the phase change heat accumulator 5 is fixedly installed on the outer surface of the first compressor 1, and is used for absorbing heat generated in the operation process of the first compressor 1, the heat accumulating material is gradually changed from a solid state to a liquid state after being heated, and meanwhile, the absorbed heat is stored, and when needed, the heat accumulating coil 6 is heated.
The first gas-liquid separator 7 is arranged on a connecting pipeline between the liquid outlet of the heat storage coil 6 and the liquid inlet of the second compressor 8, so that gas-liquid separation is realized, and heat transfer efficiency is improved. And an electromagnetic valve 9 is arranged on a connecting pipeline between the liquid outlet of the second compressor 8 and the liquid inlet of the first pipeline 10 and is used for controlling the working state of the pipeline. The liquid outlet of the first throttling device 4 is connected with the liquid inlet of the heat storage coil 6 to form a loop, so that the circulation of the refrigerant is realized, and the heat is continuously released indoors.
Further, the liquid outlet of the first compressor 1 is connected with the liquid inlet of the second pipeline 11 in the indoor heat exchanger 2, the liquid outlet of the second pipeline 11 is connected with the liquid inlet of the second throttling device 12, the liquid outlet of the second throttling device 12 is connected with the liquid inlet of the outdoor heat exchanger 3, and the liquid outlet of the outdoor heat exchanger 3 is connected with the liquid inlet of the first compressor 1 to form a closed loop.
Wherein, be equipped with second gas-liquid separator 13 on the connecting line of outdoor heat exchanger 3 and first compressor 1, improve heat exchange efficiency. The phase-change heat accumulator 5 is provided with a filler port for adding and injecting a heat-storage material into the phase-change heat accumulator 5.
The working flow of the embodiment of the invention is as follows:
when the defrosting comfort of the heat pump system needs to be improved and the heating capacity of the heat pump system needs to be improved in winter, the electromagnetic valve 9 is opened, the heat storage material releases heat, the heat is changed from a liquid state to a solid state, the heat heats the refrigerant in the heat storage coil 6, the heated refrigerant enters the second compressor 8 through the gas-liquid separator 7, the high-temperature and high-pressure refrigerant after the action of the second compressor flows through the first pipeline 10 in the indoor heat exchanger 2 to release heat, and the indoor environment temperature is improved; the refrigerant after heat release enters a heat accumulator coil 6 in a phase change heat accumulator 5 through a first throttling device 4 to evaporate and absorb heat, and then the next cycle is performed.
According to the low-temperature air source heat pump provided by the embodiment of the invention, the heat generated by the operation of the first compressor is absorbed through the heat storage device arranged on the outer surface of the first compressor, the heat is compressed by the second compressor and then is transmitted to the first pipeline in the indoor heat exchanger to release heat, the heat is provided for the indoor environment, the thermal comfort of the indoor environment is ensured, the released refrigerant flows back to the heat storage device through the first throttling device to circularly work, the comfort of the defrosting process of the heat pump is effectively improved, and the heating capacity of the heat pump is improved.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The low-temperature air source heat pump is characterized by comprising a heat storage device, wherein the heat storage device comprises a phase change heat accumulator which is embedded on the outer surface of a first compressor; the phase change heat accumulator is filled with a heat accumulating material, and a heat accumulating coil pipe is immersed in the heat accumulating material; the liquid outlet of the heat storage coil is connected with the liquid inlet of the second compressor, the liquid outlet of the second compressor is connected with the liquid inlet of a first pipeline in the indoor heat exchanger, the liquid outlet of the first pipeline is connected with the liquid inlet of the first throttling device, and the liquid outlet of the first throttling device is connected with the liquid inlet of the heat storage coil;
the liquid outlet of the first compressor is connected with the liquid inlet of a second pipeline in the indoor heat exchanger, and the liquid outlet of the second pipeline is connected with the liquid inlet of a second throttling device; the liquid outlet of the second throttling device is connected with the liquid inlet of the outdoor heat exchanger, and the liquid outlet of the outdoor heat exchanger is connected with the liquid inlet of the first compressor.
2. The cryogenic air source heat pump of claim 1 wherein a first gas-liquid separator is provided on a connection line between the liquid outlet of the thermal storage coil and the liquid inlet of the second compressor.
3. The cryogenic air source heat pump of claim 1 wherein a solenoid valve is provided on a connection line between the liquid outlet of the second compressor and the liquid inlet of the first line.
4. The cryogenic air source heat pump of claim 1 wherein a second gas-liquid separator is provided on the connection line of the outdoor heat exchanger to the first compressor.
5. The cryogenic air-source heat pump of claim 1 wherein the phase change heat accumulator is provided with a filler neck for adding filler heat storage material into the phase change heat accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910119649.8A CN109900019B (en) | 2019-02-18 | 2019-02-18 | Low-temperature air source heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910119649.8A CN109900019B (en) | 2019-02-18 | 2019-02-18 | Low-temperature air source heat pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109900019A CN109900019A (en) | 2019-06-18 |
| CN109900019B true CN109900019B (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910119649.8A Active CN109900019B (en) | 2019-02-18 | 2019-02-18 | Low-temperature air source heat pump |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05223478A (en) * | 1991-03-11 | 1993-08-31 | Ishikawajima Harima Heavy Ind Co Ltd | Chemical heat accumulating device |
| CN103791569A (en) * | 2012-10-30 | 2014-05-14 | 珠海格力电器股份有限公司 | Heat pump air-conditioning system |
| CN104110920A (en) * | 2014-07-04 | 2014-10-22 | 西安交通大学 | Air-source heat pump system for recycling waste heat of compressor |
| EP2831510A1 (en) * | 2012-03-28 | 2015-02-04 | VGE bvba | A heat pump system using latent heat |
| CN105783317A (en) * | 2016-04-19 | 2016-07-20 | 上海理工大学 | Continuous heating phase change energy storage cascade air source heat pump experiment system |
| CN206274211U (en) * | 2016-10-31 | 2017-06-23 | 广东美的制冷设备有限公司 | Heat accumulating type air-source heat pump air conditioning system and the air-conditioning comprising it |
| CN210107811U (en) * | 2019-02-18 | 2020-02-21 | 北京工业大学 | Low-temperature air source heat pump |
-
2019
- 2019-02-18 CN CN201910119649.8A patent/CN109900019B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05223478A (en) * | 1991-03-11 | 1993-08-31 | Ishikawajima Harima Heavy Ind Co Ltd | Chemical heat accumulating device |
| EP2831510A1 (en) * | 2012-03-28 | 2015-02-04 | VGE bvba | A heat pump system using latent heat |
| CN103791569A (en) * | 2012-10-30 | 2014-05-14 | 珠海格力电器股份有限公司 | Heat pump air-conditioning system |
| CN104110920A (en) * | 2014-07-04 | 2014-10-22 | 西安交通大学 | Air-source heat pump system for recycling waste heat of compressor |
| CN105783317A (en) * | 2016-04-19 | 2016-07-20 | 上海理工大学 | Continuous heating phase change energy storage cascade air source heat pump experiment system |
| CN206274211U (en) * | 2016-10-31 | 2017-06-23 | 广东美的制冷设备有限公司 | Heat accumulating type air-source heat pump air conditioning system and the air-conditioning comprising it |
| CN210107811U (en) * | 2019-02-18 | 2020-02-21 | 北京工业大学 | Low-temperature air source heat pump |
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| CN109900019A (en) | 2019-06-18 |
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