CN109900021A - Heat storage heat pump system - Google Patents
Heat storage heat pump system Download PDFInfo
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- CN109900021A CN109900021A CN201910119664.2A CN201910119664A CN109900021A CN 109900021 A CN109900021 A CN 109900021A CN 201910119664 A CN201910119664 A CN 201910119664A CN 109900021 A CN109900021 A CN 109900021A
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- heat
- heat exchanger
- storage
- refrigerant
- compressor
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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 present invention relates to art of heat pumps, provide a kind of heat storage heat pump system, compressor, indoor heat exchanger, throttling set, outdoor heat exchanger including being in turn connected to form the first refrigerant circulation loop, the outer surface of the compressor is equipped with storage heater, second refrigerant circulation line is connected on first refrigerant circulation loop between the indoor heat exchanger and outdoor heat exchanger, the second refrigerant circulation line is connected to the entrance of the storage heater, and the outlet of the storage heater connects the input end of the compressor.Heat storage heat pump system provided by the invention makes full use of heat of compressor, improves system heating capacity, strengthens heating.
Description
Technical field
The present invention relates to art of heat pumps, more particularly to a kind of heat storage heat pump system.
Background technique
Heat pump is a kind of device of the heat energy transfer by low level heat energy to high-order heat source, and the new energy skill to receive much attention
Art.Heat pump is usually first from the empty gas and water or soil of nature to obtain low grade heat energy, is done work by electric power, then again to
People provide the high-grade thermal energy that can be utilized.
The type of heat pump is divided into according to Heating style difference: air source heat pump, water resource heat pump, earth source heat pump, double-source heat pump
(e.g., water resource heat pump and air source heat pump combination) etc. is a variety of.Wherein, the working principle of air source heat pump are as follows: evaporator is from environment
Draw heat is in air energy with evaporation heat transfer working medium, and refrigerant vapor pressure and temperature after compressor compresses rises, high-temperature vapour
Liquid is condensed into after heat exchange equipment heat exchange, is flowed back into evaporator.
Heat pump in use, especially air source heat pump, when winter outdoor environment temperature is lower, relative humidity is larger
When, air source heat pump often in being run under frozen condition, and when heat pump is run at a lower temperature will affect pressure of inspiration(Pi),
Suction temperature, heating capacity reduce etc., further, air source heat pump be chronically in winter cold environment can cause heat pump system without
The problem of method continues to run, strengthening heating becomes an urgent demand of low-temperature air source heat pump.
Summary of the invention
(1) technical problems to be solved
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies: the operation of heat pump by
To the influence of environmental condition, in low-temperature cold environment, the heating capacity of heat pump can be reduced, and resulting even in heat pump system can not transport
Capable problem.
The object of the present invention is to provide a kind of heat storage heat pump systems, make full use of heat of compressor, improve system heating
Amount strengthens heating, simplifies structure, reduces cost.
(2) technical solution
In order to solve the above technical problem, the present invention provides a kind of heat storage heat pump systems, including are in turn connected to form
Compressor, indoor heat exchanger, throttling set, the outdoor heat exchanger of one refrigerant circulation loop, on the outer surface of the compressor
Equipped with storage heater, is connected on first refrigerant circulation loop between the indoor heat exchanger and outdoor heat exchanger
Two refrigerant circulation lines, the second refrigerant circulation line are connected to the entrance of the storage heater, and the storage heater goes out
Mouth connects the input end of the compressor.
Preferably, the second refrigerant circulation line be connected to the throttling set and the outdoor heat exchanger it
Between；Or the throttling set includes first throttling device and second throttling device, the first throttling device is connected to the room
Between interior heat exchanger and the outdoor heat exchanger, the second refrigerant circulation line be connected to the indoor heat exchanger with it is described
Between first throttling device and the second refrigerant circulation line is equipped with second throttling device.
In above-mentioned any scheme preferably, the throttling set includes electric expansion valve, capillary or capillary wick.
In above-mentioned any scheme preferably, the outlet of the storage heater and the outlet of the outdoor heat exchanger are connected with
Gas-liquid separator.
In above-mentioned any scheme preferably, the outlet of the storage heater and the outlet of the outdoor heat exchanger are pooled to
The inlet ductwork of the compressor, the outlet of the storage heater and the outlet of the outdoor heat exchanger are by piping connection described
Same Rendezvous Point in the inlet ductwork of compressor.
In above-mentioned any scheme preferably, the gas-liquid separator is connected in the inlet ductwork of the compressor.
In above-mentioned any scheme preferably, the outlet end of the storage heater is equipped with Unidirectional solenoid valve.
In above-mentioned any scheme preferably, the storage heater is set as phase change heat accumulator.
In above-mentioned any scheme preferably, the storage heater includes heat-storing material and accumulation of heat coil pipe, second system
The refrigerant of refrigerant cycle pipeline is passed through in the accumulation of heat coil pipe, and the heat-storing material is filled outside the accumulation of heat coil pipe.
In above-mentioned any scheme preferably, the heat-storing material includes solid-liquid phase change material.
(3) beneficial effect
Compared with prior art, the invention has the following advantages that
Shell based on compressor dissipates thermal property, and storage heater is collected and stores to the shell heat dissipation of compressor, will
Compressor shell heat dissipation be used for refrigerant evaporation process, in heat pump system formed two evaporation heat supplying pipelines, one
Divide refrigerant to absorb heat by outdoor heat exchanger to evaporate, part of refrigerant is absorbed heat by storage heater and evaporated, using two evaporations confessions
The form that thermal process is evaporated refrigerant had not only made full use of the waste heat of compressor, but also has improved the heating capacity of heat pump system, from
And the heating capacity of heat pump system is improved, it can be used for solving the problems, such as that heating capacity is insufficient under cold cryogenic conditions.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of a preferred embodiment of heat storage heat pump system of the present invention；
In figure, 1, compressor；2, indoor heat exchanger；3, outdoor heat exchanger；4, throttling set；5, storage heater；6, heat-storage plate
Pipe；7, gas-liquid separator；8, Unidirectional solenoid valve；9, second refrigerant circulation line；10, the first refrigerant circulation line.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
Aiming at the problem that existing heat pump system heating capacity influenced by ambient temperature and existing reduces, the invention proposes
A kind of heat storage heat pump system, the compressor housing waste heat stored are applied in the heating operation of heat pump, make full use of compressor
The waste heat of shell, to improve the heating capacity of whole system.
As shown in connection with fig. 1, the present invention provides a kind of preferred embodiment of heat storage heat pump system, including is in turn connected to form
Compressor 1, indoor heat exchanger 2, throttling set 4, the outdoor heat exchanger 3 of first refrigerant circulation loop, refrigerant is in compressor 1
High temperature and high pressure gas is formed after interior heating pressurization and enters the room heat exchanger 2, and indoor heat exchanger 2 absorbs the heat of refrigerant to realize
The function of heating, refrigerant form the liquid condition of high pressure low temperature, the liquid system of high pressure low temperature in heat exchanger 2 indoors after heat release
Cryogen enters 3 evaporation endothermic of outdoor heat exchanger, liquid system of the outdoor heat exchanger 3 to low-temp low-pressure after the decompression of throttling set 4
Cryogen carries out the refrigerant of formation low pressure superheated gaseous after heating evaporation, and refrigerant evaporates in vaporization cycle forms low-pressure gas
After be again introduced into compressor 1, carry out next circulation.
In addition, while refrigerant carries out heat supply by the first refrigerant circulation loop, after 2 heat supply of heat exchanger indoors
Part of refrigerant enters storage heater 5 after the decompression of throttling set 4, and the refrigerant into storage heater 5 is by the second refrigeration
Agent circulation line 9 is shunted, and liquid refrigerant flows into storage heater 5 by second refrigerant circulation line 9, and storage heater 5 is arranged
In the outer surface of compressor 1, storage heater 5 is used to absorb the waste heat of 1 shell of compressor release, and storage heater 5 is used to make to second
Refrigerant in refrigerant cycle pipeline 9 is heated, and the input end of the outlet connect compressor 1 of storage heater 5, refrigerant is in accumulation of heat
It is again introduced into compressor 1 after forming low area overheat gas after heat absorption in device 5, carries out next circulation.
Compressor 1, indoor heat exchanger 2, throttling set 4, the first refrigerant circulation line 10, outdoor heat exchanger 3 form the
One refrigerant circulation loop；Compressor 1, indoor heat exchanger 2, throttling set 4, second refrigerant circulation line 9,5 shape of storage heater
At second refrigerant circulation loop.First refrigerant circulation loop is the main circulation loop of refrigerant, and second refrigerant is recycled back to
Road is the auxiliary circulation circuit of refrigerant, makes full use of the shell waste heat of compressor 1, increases heating capacity.Indoor heat exchanger 3 and storage
The hot cooperation of device 5 carries out heating evaporation to refrigerant, and part of refrigerant forms low area overheat gas after absorbing heat in storage heater 5,
Part of refrigerant forms low area overheat gas after absorbing heat in outdoor heat exchanger 3, and the refrigerant of low pressure superheated gaseous enters pressure
Contracting machine 1, refrigerant carry out temperature-pressure in compressor 1, carry out heating operations next time.
Lead between each equipment such as indoor heat exchanger 2, outdoor heat exchanger 3, compressor 1, storage heater 5 and throttling set 4
Piping connection.
The present embodiment provides a kind of heat pump system of double vaporization cycle reinforcing heatings based on the shell accumulation of heat to compressor 1
System recycles the waste heat of compressor 1 using storage heater 5, and by way of two evaporation tube roads are arranged, storage heater 5 is recycled
Heat be used for part of refrigerant evaporation endothermic process, in storage heater 5 evaporate after refrigerant be passed through in compressor 1,
Other refrigerant is passed through in compressor 1 after evaporating in outdoor heat exchanger 3, and storage heater 5 and outdoor heat exchanger 3 cooperate to refrigeration
Agent heating evaporation, makes full use of the waste heat of compressor 1, while guaranteeing the heating capacity of system, improves heating capacity.
Further, the position of throttling set 4 can according to need setting, first, second refrigerant circulation line 9 connects
It between throttling set 4 and outdoor heat exchanger 3, is depressured, is dropped before refrigerant enters outdoor heat exchanger 3 or storage heater 5
Indoor heat exchanger 3 is respectively enterd after pressure again or storage heater 5 exchanges heat, simplifies structure；Second, throttling set 4 is filled including first throttle
It sets and second throttling device, first throttling device is connected between indoor heat exchanger 2 and outdoor heat exchanger 3, second refrigerant follows
Endless tube road 9 is connected between indoor heat exchanger 2 and first throttling device and second refrigerant circulation line 9 is equipped with the second throttling
Device, according to the bearing capacity, second refrigerant circulation line 9 and storage of the first refrigerant circulation line 10 and outdoor heat exchanger 3
The bearing capacity of hot device 5 is depressured respectively, and the refrigerant after decompression enters storage heater 5 or outdoor heat exchanger 3.Throttling set 4
When being arranged between indoor heat exchanger 2 and the entrance of second refrigerant circulation line 9, the first refrigerant circulation line 10 and second
Refrigerant circulation line 9 is both connected to the outlet of throttling set 4, and refrigerant forms low-temp low-pressure after the decompression of throttling set 4
Enter outdoor heat exchanger 3 or storage heater 5 after liquid refrigerant, low-temp low-pressure liquid refrigerant is in outdoor heat exchanger 3 or storage heater 5
Enter compressor 1 after being inside thermally formed gaseous refrigerant.
When throttling set 4 is arranged in the first refrigerant circulation line 10 and second refrigerant circulation line 9, the second refrigeration
It is connected with second throttling device on agent circulation line 9, is connected with first throttling device in the first refrigerant circulation line 10, passes through
Refrigerant after first throttling device decompression is directly entered outdoor heat exchanger 3, the refrigerant after second throttling device is depressured
Into storage heater 5, part of refrigerant forms low area overheat gas after absorbing heat in storage heater 5, and part of refrigerant is in outdoor
Low area overheat gas is formed in heat exchanger 3 after heat absorption, the refrigerant of low pressure superheated gaseous enters compressor 1, and refrigerant is compressing
Temperature-pressure is carried out in machine 1, carries out heating operations next time.
Further, the refrigerant outlet of the refrigerant outlet of storage heater 5 and outdoor heat exchanger 3 is connected with gas-liquid separator
7.Refrigerant drop may be carried in the refrigerant heated by storage heater 5 or outdoor heat exchanger 3, gas-liquid separator 7 is used for
The refrigerant of gaseous state and liquid is separated, guarantees that refrigerant enters compressor 1 with gaseous state, compressor 1 is protected.
Wherein, gas-liquid separator 7 can be in the refrigerant outlet position of storage heater 5, the refrigerant outlet of outdoor heat exchanger 3
Position is respectively set, by storage heater 5 heat refrigerant and by outdoor heat exchanger 3 heat refrigerant after removing drop again
Collect and is passed through compressor 1.
In addition, gas-liquid separator 7 can also be arranged in the entrance location of compressor 1, the refrigerant heated by storage heater 5
First collect with the refrigerant heated by outdoor heat exchanger 3 afterwards enter back into gas-liquid separator 7 and carry out drop, then gas-liquid separation
Gaseous refrigerant is passed through in compressor 1 by device 7.
Further, the entrance location of compressor 1 is connected with inlet ductwork, the refrigerant outlet outflow of storage heater 5
The refrigerant that the refrigerant outlet of refrigerant and outdoor heat exchanger 3 flows out collects in the inlet ductwork of compressor 1, to be passed through
Compressor 1.
Refrigerant can carry out gas-liquid separation before entering inlet ductwork, can also carry out after being passed through inlet ductwork mixing
Gas-liquid separation.
Preferably, the refrigerant outlet of the refrigerant outlet of storage heater 5 and outdoor heat exchanger 3 is both connected to compressor 1
The refrigerant that the refrigerant of the same Rendezvous Point of inlet ductwork, i.e. storage heater 5 outflow is flowed out with outdoor heat exchanger 3 collects same
Point flows into inlet ductwork, and gas-liquid separator 7 is connected in the inlet ductwork of compressor 1, carries out mixing in inlet ductwork laggard
Enter gas-liquid separator 7, flows into compressor 1 again after gas-liquid separation.
Further, the refrigerant outlet end of storage heater 5 is equipped with Unidirectional solenoid valve 8, prevents refrigerant from flowing backwards, and guarantees refrigerant
Stablize circulation.
Preferably, storage heater 5 is set as phase change heat accumulator, and using the heat-storing material of phase transformation, heat-storing material is changed by heat absorption
Materials behavior and carry out latent-heat storage.Phase-transition heat-storage can be divided into that solid-liquid phase becomes, liquid-gas phase becomes and solid-gas phase becomes, according to being
The differences such as system scale, heating capacity demand, select different heat-storing materials.Preferably, heat-storing material includes solid-liquid phase change material, is fitted
For low temperature phase change heat-accumulating process, heat-storing material can select paraffin, expanded graphite etc..
Storage heater 5 is entrenched in the outer surface of compressor 1, and storage heater 5, which encloses, is formed as hollow knot on the shell for overlaying on compressor 1
Structure, the interior cavity that formed of storage heater 5 is for absorbing and utilizing 1 waste heat of compressor.
Storage heater 5 includes heat-storing material and accumulation of heat coil pipe 6, and the refrigerant of second refrigerant circulation line 9 is passed through heat-storage plate
In pipe 6, heat-storing material is filled outside accumulation of heat coil pipe 6.Heat-storing material is filled in the cavity of storage heater 5, and accumulation of heat coil pipe 6 is placed in accumulation of heat
In material, heat-storing material fully absorbs the waste heat of compressor 1, and heat-storing material transfers heat to the system in accumulation of heat coil pipe 6
Cryogen.
The heat-storing material of solid-liquid phase change is used to absorb the shell heat to shed outward when compressor 1 operates, and heat-storing material is gradually
Liquid is transformed from the solidified state into for storing its waste heat, when device carries out heating operation, refrigerant flows through the accumulation of heat in storage heater 5
Coil pipe 6, the latent heat of phase change of refrigerant suction heat-storing material, heat-storing material are gradually transformed into solid-state by liquid.
Accumulation of heat coil pipe 6 is formed as helical structure, 6 ring-wound compressor of accumulation of heat coil pipe, 1 shell.
Further, it is also provided with electric heating assembly in storage heater 5, is not enough to the supply system in the waste heat of compressor 1
It when cryogen heat demand, is assisted by electric heating, guarantees the stable operation of the first vaporization cycle.Electric heating assembly is preferably
The heating coil being embedded in accumulation of heat coil pipe 6 quickly heats refrigerant, while the heat dissipation of heating coil can be absorbed in heat-storing material
Amount is used for supplementary heating.Preferably, the inside of accumulation of heat coil pipe 6 is arranged in heating coil.
Throttling set 4 includes electric expansion valve, capillary or capillary wick etc., and the throttle structure suitable for refrigerant decompression is equal
It is applicable in.
The specific course of work:
Storage heater 5 is entrenched in the outer surface of compressor 1, the heat-storing material of filling solid-liquid phase change, storage heater 5 in storage heater 5
Interior accumulation of heat coil pipe 6 spirals inside heat-storing material, and heat-storing material absorbs the heat to shed outward when compressor 1 operates, accumulation of heat
Material is gradually transformed into the shell heat of storage in liquid compressor 1 by solid-state.
Heat pump is when carrying out heating operation, the refrigerant flow through indoor heat exchanger 2 and section of the high temperature and pressure that compressor 1 flows out
It after flowing device 4, is shunted from a point, part of refrigerant flows through storage heater 5 directly through outdoor heat exchanger 3, another part refrigerant
Interior accumulation of heat coil pipe 6 is evaporated heat absorption, and heat-storing material is gradually transformed into solid-state by liquid at this time, and last two parts refrigerant exists
B point converges, and carries out next circulation into compressor 1 through gas-liquid separator 7.
1 shell waste heat of compressor is recycled, and this waste heat is applied to by the heat pump system of above-described embodiment
In the heating operations of heat pump system, to improve the heating capacity of heat pump system.
In the description of the present invention, it should be noted that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second ", " third " etc. are used for description purposes only, and should not be understood as instruction or
Imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, concrete condition can be regarded and understand that above-mentioned term exists
Concrete meaning in the present invention.
In addition, in the description of the present invention, unless otherwise indicated, " multiple ", " more ", " multiple groups " be meant that two or
It is more than two.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of heat storage heat pump system, which is characterized in that the compression including being in turn connected to form the first refrigerant circulation loop
The outer surface of machine, indoor heat exchanger, throttling set, outdoor heat exchanger, the compressor is equipped with storage heater, is located at the interior
Connect second refrigerant circulation line on first refrigerant circulation loop between heat exchanger and outdoor heat exchanger, described the
Two refrigerant circulation lines are connected to the entrance of the storage heater, and the outlet of the storage heater connects the import of the compressor
End.
2. heat storage heat pump system according to claim 1, which is characterized in that the second refrigerant circulation line connection
Between the throttling set and the outdoor heat exchanger；Or the throttling set includes first throttling device and the second throttling dress
It sets, the first throttling device is connected between the indoor heat exchanger and the outdoor heat exchanger, and the second refrigerant follows
Endless tube road is connected between the indoor heat exchanger and the first throttling device and sets on the second refrigerant circulation line
There is the second throttling device.
3. heat storage heat pump system according to claim 1, which is characterized in that the throttling set includes electronic expansion
Valve, capillary or capillary wick.
4. heat storage heat pump system according to claim 1 to 3, which is characterized in that the outlet of the storage heater
Outlet with the outdoor heat exchanger is connected with gas-liquid separator.
5. heat storage heat pump system according to claim 4, which is characterized in that the outlet of the storage heater and the outdoor
The outlet of heat exchanger is pooled to the inlet ductwork of the compressor, the outlet and the outlet of the outdoor heat exchanger of the storage heater
Pass through same Rendezvous Point of the piping connection in the inlet ductwork of the compressor.
6. heat storage heat pump system according to claim 5, which is characterized in that the gas-liquid separator is connected to the pressure
In the inlet ductwork of contracting machine.
7. heat storage heat pump system according to claim 1, which is characterized in that the outlet end of the storage heater is equipped with unidirectional
Solenoid valve.
8. heat storage heat pump system according to claim 1, which is characterized in that the storage heater is set as phase change heat accumulator.
9. heat storage heat pump system according to claim 8, which is characterized in that the storage heater includes heat-storing material and storage
Hot coil, the refrigerant of the second refrigerant circulation line are passed through in the accumulation of heat coil pipe, and institute is filled outside the accumulation of heat coil pipe
State heat-storing material.
10. heat storage heat pump system according to claim 9, which is characterized in that the heat-storing material includes solid-liquid phase change
Material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910119664.2A CN109900021A (en) | 2019-02-18 | 2019-02-18 | Heat storage heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910119664.2A CN109900021A (en) | 2019-02-18 | 2019-02-18 | Heat storage heat pump system |
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| Publication Number | Publication Date |
|---|---|
| CN109900021A true CN109900021A (en) | 2019-06-18 |
Family
ID=66944879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910119664.2A Pending CN109900021A (en) | 2019-02-18 | 2019-02-18 | Heat storage heat pump system |
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| Country | Link |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN209960795U (en) * | 2019-02-18 | 2020-01-17 | 北京工业大学 | Heat storage type heat pump system |
-
2019
- 2019-02-18 CN CN201910119664.2A patent/CN109900021A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN209960795U (en) * | 2019-02-18 | 2020-01-17 | 北京工业大学 | Heat storage type heat pump system |
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