CN109931721A - One kind is based on solar heat-preservation defrosting Gas-supplying enthalpy-increasing heat pump system - Google Patents
One kind is based on solar heat-preservation defrosting Gas-supplying enthalpy-increasing heat pump system Download PDFInfo
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- CN109931721A CN109931721A CN201811033627.1A CN201811033627A CN109931721A CN 109931721 A CN109931721 A CN 109931721A CN 201811033627 A CN201811033627 A CN 201811033627A CN 109931721 A CN109931721 A CN 109931721A
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Abstract
The invention discloses one kind based on solar heat-preservation defrosting Gas-supplying enthalpy-increasing heat pump system, it include: compression refrigeration subsystem and solar heat-preservation subsystem, in system accumulation of heat, the solar heat-preservation subsystem is arranged in parallel with the compression refrigeration subsystem, in system defrosting, the solar heat-preservation subsystem is arranged in series with the compression refrigeration subsystem.Compared with prior art, the present invention can be defrosted using the waste heat of solar energy and heating circulation, can reach defrosting and energy-efficient technical effect simultaneously.
Description
Technical field
The present invention relates to Defrost technical fields, more specifically to one kind based on solar heat-preservation defrosting tonifying Qi
Enthalpy increasing heat pump system.
Background technique
Air source heat pump is one kind based on low-temperature heat source, is produced using the low grade heat energy in air higher than environment temperature
The hot water of degree or the energy saver of air.Air-source as its rich reserves of low level heat energy, and with traditional heat-supplying mode phase
Than air source heat pump not only reduces energy consumption, but also reduces environmental pollution.Air source heat pump technology is promoted in energy-saving and emission-reduction, protection environment
Aspect is with a wide range of applications.
The operation of air source heat pump is affected by the epidemic disaster of ambient enviroment, in cold district or extreme weather conditions
The frosting problem of lower runtime system restricts its promoted extension and development speed, when the coil temperature of outdoor unit is empty lower than outdoor
When the dew-point temperature of gas, the coil pipe of outdoor unit would generally frosting.A large amount of frost accumulates on outdoor unit coil pipe, will weaken significantly
The heat transfer property of evaporator, meanwhile, the air flowing between outdoor unit coil pipe is hindered, heat exchanged thermoresistance increases, and heating capacity is reduced, energy
Effect is than decline.The frosting of air source heat pump outdoor heat exchanger and defrosting problem cause air source heat pump operational effect undesirable
One main cause.Therefore, it is necessary to take the measure that effectively defrosts.
Summary of the invention
The shortcomings that for the above-mentioned prior art or deficiency utilize the sun the technical problem to be solved in the present invention is to provide a kind of
The waste heat that can and heat circulation defrosts, and can reach defrosting simultaneously and energy-efficient based on solar heat-preservation defrosting Gas-supplying enthalpy-increasing
Heat pump system.
In order to solve the above technical problems, the present invention has following constitute:
One kind is based on solar heat-preservation defrosting Gas-supplying enthalpy-increasing heat pump system, comprising: compression refrigeration subsystem and solar energy store
Thermal sub-system, in system accumulation of heat, the solar heat-preservation subsystem is arranged in parallel with the compression refrigeration subsystem, in system
When defrosting, the solar heat-preservation subsystem is arranged in series with the compression refrigeration subsystem.
Further, the compression refrigeration subsystem includes compressor, indoor heat exchanger, energy storage heat exchanger, economizer, room
External heat exchanger, gas-liquid separator, four-way reversing valve, first throttling device and second throttling device, the compressor is through four-way
The connection of the arrival end of reversal valve and indoor heat exchanger, the outlet end of the indoor heat exchanger and the arrival end of the first triple valve connect
It connects；The first exit end of first triple valve is connect with the arrival end of third triple valve, and the second of first triple valve goes out
Mouth end is sequentially connected the arrival end of flow valve and the second triple valve, the first exit end and the accumulation of energy of second triple valve
The arrival end of heat exchanger connects, and the outlet end of the energy storage heat exchanger is connect with the arrival end of the 4th triple valve, wherein described the
The first exit end of four triple valves is connect with the first exit end of the third triple valve；The second outlet of the third triple valve
End is connect by first throttling device with the first end of the economizer, the second end of the economizer, third end respectively with institute
Compressor, second throttling device connection are stated, the second throttling device is sequentially connected outdoor heat exchanger, the 5th triple valve, the 6th
The arrival end of triple valve, four-way reversing valve and gas-liquid separator, wherein the outlet end of the gas-liquid separator connects the pressure
Contracting machine.
Further, the second outlet end of second triple valve and one of outlet end of the 6th triple valve connect
It connects, the second outlet end of the 4th triple valve is connect with one of outlet end of the 5th triple valve.
When the system is in accumulation of heat mode, refrigerant vapour through the compressor pressurize from four-way reversing valve come out with
After enter the room heat exchanger, refrigerant liquid of the heat exchanger after condensing heat release is divided into two by the first triple valve indoors
Road passes sequentially through flow valve, the second triple valve all the way and enters after energy storage heat exchanger heat exchange later, flows through the 4th triple valve later
And converge at third triple valve with another way refrigerant liquid, the refrigerant liquid after converging throttles by first throttling device
After decompression, exchange heat into economizer with the refrigerant vapour extracted out from scroll compressor, the refrigerant liquid after heat exchange
Body enter second throttling device carry out second throttle decompression, the 4th triple valve close, second throttle be depressured after refrigerant into
The 5th triple valve is passed sequentially through after entering outdoor heat exchanger heat absorption evaporation and the 6th triple valve, four-way reversing valve enter gas-liquid separation
Device is again introduced into compressor；The solar heat-preservation subsystem is arranged in parallel in accumulation of heat with compression refrigeration subsystem.
When the system is in defrosting mode, closes under the control action of the controller of the flow valve, changed from interior
Refrigerant liquid after hot device exchanges heat out fills after being directly over third triple valve after the first triple valve through first throttle
It sets, enter outdoor heat exchanger heat absorption evaporation after economizer, second throttling device, the 4th triple valve is opened, after heat absorption evaporation
Refrigerant vapour enters energy storage heat exchanger and defrosts by the 5th triple valve and the 4th triple valve, then successively through the second threeway
Valve, the 6th triple valve and four-way reversing valve enter gas-liquid separator, eventually re-enter compressor；At this point, the compression system
Refrigeration subsystem is arranged in series with solar heat-preservation subsystem.
Further, the first throttling device and second throttling device are electric expansion valve.
Further, high voltage protective switch is additionally provided on the pipeline between the compressor and four-way reversing valve.
Further, the solar heat-preservation subsystem includes solar thermal collector, energy storage heat exchanger and pump, it is described too
Positive energy heat collector and pump are successively connected to setting with the Outer Tube of the energy storage heat exchanger, wherein the pump is connect with controller, too
The hot water of positive energy heat collector flows through energy storage heat exchanger by pump and exchanges heat.
Further, the coil pipe of the energy storage heat exchanger is equipped with the first temperature sensor and second temperature sensor,
First temperature sensor and second temperature sensor are connected with controller.
Further, the energy storage heat exchanger includes the spiral coil of two different-diameters and the set of two different radiis
Cylinder, wherein the spiral coil of two different-diameters is placed between two sleeves of different radii, the spiral coil
Heat accumulating phase change material is filled between the sleeve.
Further, the heat accumulating phase change material chooses CaCl2·6H2The SrCl of O and mass fraction 2%2·
6H2The Ba (OH) of O and mass fraction 2%2。
Compared with prior art, the present invention has the following technical effect that
The present invention is relative to conventional air source heat pump system additional Gas-supplying enthalpy-increasing technology and solar heat-preservation system, benefit
It is defrosted with the waste heat of solar energy and heating circulation, defrosting and energy-efficient purpose can be reached simultaneously；
The present invention is by under the action of controller, changing the switch of flow valve or the 4th triple valve to realize system model
Freely convert；
The heat that energy storage heat exchanger in the present invention absorbs the waste heat of heating system and solar thermal collector is collected, changes
The problem for the defrosting energy deficiency that traditional Defrost mode generates, and reach energy-efficient purpose.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon:
Fig. 1: the present invention is based on solar heat-preservation defrosting Gas-supplying enthalpy-increasing heat pump system flow charts；
Fig. 2: the top view of energy storage heat exchanger in the present invention；
Fig. 3: the sectional view of energy storage heat exchanger in the present invention.
Specific embodiment
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
As shown in Figure 1, the present embodiment is based on solar heat-preservation defrosting Gas-supplying enthalpy-increasing heat pump system, comprising: compression refrigeration
System and solar heat-preservation subsystem, in system accumulation of heat, the solar heat-preservation subsystem and the compression refrigeration subsystem
It is arranged in parallel, in system defrosting, the solar heat-preservation subsystem is arranged in series with the compression refrigeration subsystem.
Wherein, the compression refrigeration subsystem includes compressor 1, indoor heat exchanger 2, energy storage heat exchanger 4, economizer 5, room
External heat exchanger 6, gas-liquid separator 7, four-way reversing valve 8, first throttling device 17 and second throttling device 18, the compressor
1 connect through four-way reversing valve 8 with the arrival end of indoor heat exchanger 2, the outlet end of the indoor heat exchanger 2 and the first triple valve 12
Arrival end connection；The first exit end of first triple valve 12 is connect with the arrival end of third triple valve 15, and described first
The second outlet end of triple valve 12 is sequentially connected the arrival end of flow valve 13 and the second triple valve 14, second triple valve 14
First exit end connect with the arrival end of the energy storage heat exchanger 4, the outlet end of the energy storage heat exchanger 4 and the 4th triple valve
16 arrival end connection, wherein the first exit end of the 4th triple valve 16 and the first outlet of the third triple valve 15
End connection；The second outlet end of the third triple valve 15 connects by first throttling device 17 and the first end of the economizer 5
It connects, the second end of the economizer 5, third end are connect with the compressor 1, second throttling device 18 respectively, second section
Stream device 18 is sequentially connected outdoor heat exchanger 6, the 5th triple valve 19, the 6th triple valve 20, four-way reversing valve 8 and gas-liquid separation
The arrival end of device 7, wherein the outlet end of the gas-liquid separator 7 connects the compressor 1.
In the present embodiment, the compressor 1 selects scroll compressor.
As a further improvement, the second outlet end of second triple valve 14 and the 6th triple valve 20 are wherein
The connection of one outlet end, the second outlet end of the 4th triple valve 16 and one of outlet end of the 5th triple valve 19
Connection.
The solar heat-preservation subsystem includes solar thermal collector 3, energy storage heat exchanger 4 and pump 9, the solar energy collection
Hot device 3 and pump 9 are successively connected to setting with the Outer Tube of the energy storage heat exchanger 4, wherein the pump 9 is connect with controller.
As shown in Figures 2 and 3, in the present embodiment, the spiral coil of the energy storage heat exchanger 4 including two different-diameters and
The sleeve of two different radiis, wherein the spiral coil of two different-diameters is placed in two sleeves of different radii
Between, heat accumulating phase change material is filled between the spiral coil and the sleeve.
As shown in Fig. 2, the coil pipe includes inner coil pipe 41 and outer coil pipe 42, wherein inner coil pipe import 411 passes through inner wall
401 and setting is connected to the inner coil pipe 41, inner coil pipe outlet 412 is arranged on the inner coil pipe 41；Outer coil pipe import 421 is worn
It crosses outer wall 402 and is connected to setting with the outer coil pipe 42, outer coil outlets 422 are arranged on the outer coil pipe 42.
As shown in figure 3, the sleeve includes inner sleeve 43 and outer sleeve 44, wherein inner sleeve import 431, inner sleeve go out
The setting of mouth 432, outer sleeve import 441 and outer sleeve outlet 442 is as shown in the figure.
The energy storage heat exchanger 4 chooses crystalline hydrate salt phase-change material CaCl2·6H2O is as heat accumulating phase change material, outside
Add the SrCl of mass fraction 2%2·6H2The Ba (OH) of O and mass fraction 2%2, for eliminating CaCl2·6H2O is in phase transition process
In supercooling and lamination.
Outer Tube in the energy storage heat exchanger 4 accesses solar heat-preservation subsystem, interior conduit access compression refrigeration subsystem
System.The energy storage heat exchanger 4 not only exchanges heat with the heat from solar thermal collector 3, but also changes with from indoor heat exchanger 2
Refrigerant liquid after heat comes out exchanges heat, and solves conventional heat pump except the energy that defrosts during bring defrosting in defrosting system
The problem of source deficiency.
The energy storage heat exchanger 4 is that a kind of phase change heat accumulator stores extra heat when normal heat supply is met the requirements；
During defrosting, the first temperature sensor 10 and second is installed as the low level heat energy of heat pump, and at 4 both ends of energy storage heat exchanger
Temperature sensor 11.
Further, the coil pipe of the energy storage heat exchanger 4 is equipped with the first temperature sensor 10 and second temperature senses
Device 11, first temperature sensor 10 and second temperature sensor 11 are connected with controller.The controller also with it is described
Flow valve 13 is connected with pump 9, and when the coil temperature reaches default defrosting temperature value, the controller can control the stream
It measures valve 13 and pump 9 disconnects.
In order to improve the safety of system, avoid the pressure for the high-pressure gaseous refrigerant being discharged from compressor 1 excessive and right
Four-way reversing valve 8 impacts, and high voltage protective is equipped on the pipeline between the compressor 1 and four-way reversing valve 8 and is switched.
In the present embodiment, the indoor heat exchanger 2 is condenser, and outdoor heat exchanger 6 is evaporator.
As a further improvement, the first throttling device 17 and second throttling device 18 are electric expansion valve.?
In the present embodiment, throttle style is two-step throttle, supplements refrigerant gas in economizer 5 and section by intermediate pressure return-air jet port
Refrigerant liquid after stream exchanges heat, and realizes the increase of heating capacity.
When the present embodiment is in accumulation of heat mode: refrigerant vapour comes out through the pressurization of compressor 1 from four-way reversing valve 8 with laggard
Entering indoor heat exchanger 2, refrigerant liquid of the heat exchanger after condensing heat release is divided into two-way by the first triple valve 12 indoors,
Enter the heat exchange of energy storage heat exchanger 4 after passing sequentially through flow valve 13, the second triple valve 14 all the way, flows through the 4th triple valve 16 later simultaneously
Converge at third triple valve 15 with another way refrigerant liquid, the refrigerant liquid after converging passes through 17 section of first throttling device
After stream decompression, exchange heat into economizer 5 with the refrigerant vapour extracted out from compressor 1, the refrigerant liquid after heat exchange
Second throttle decompression is carried out into second throttling device 18, the 4th triple valve 16 is closed, the refrigerant after second throttle decompression
The 5th triple valve 19 is passed sequentially through after into the heat absorption evaporation of outdoor heat exchanger 6 and the 6th triple valve 20, four-way reversing valve 8 enter gas
Liquid/gas separator 7 is again introduced into compressor 1.And in addition hold over system all the way is that the hot water from solar thermal collector 3 passes through
Pump 9 flows through energy storage heat exchanger 4 and exchanges heat.At this point, the solar heat-preservation subsystem is arranged in parallel with compression refrigeration subsystem.
When the present embodiment is in defrosting mode: being closed under the control action of the controller of flow valve 13, from indoor heat exchange
Refrigerant liquid after the heat exchange of device 2 comes out be not further divided into two-way after the first triple valve 12, is directly over third threeway
Enter the heat absorption evaporation of outdoor heat exchanger 6 after valve 15 after first throttling device 17, economizer 5, second throttling device 18, the 4th
Triple valve 16 is opened, and the refrigerant vapour after heat absorption evaporation enters accumulation of energy by the 5th triple valve 19 and the 4th triple valve 16 and exchanges heat
Device 4 defrosts, and then successively enters gas-liquid separator through the second triple valve 14, the 6th triple valve 20 and four-way reversing valve 8
7, eventually re-enter compressor 1.At this point, the solar heat-preservation subsystem is arranged in series with compression refrigeration subsystem.
The Gas-supplying enthalpy-increasing technology specific operation process that the present invention uses: the intermediate pressure system extracted from scroll compressor 1
Cold air exchanges heat in economizer 6 and the refrigerant liquid after throttling, and the refrigerant liquid after heat exchange enters the second throttling dress
Set 18 carry out second throttle decompressions.
When outdoor temperature is very low, the heat-exchange capacity of outdoor heat exchanger 6 declines, the return-air of the normal gas returning port of compressor 1
Amount is reduced, and 1 power of compressor reduces, and cannot play best effects.But refrigerant gas is supplemented by intermediate pressure return-air jet port,
To increase by 1 capacity of compressor, the circularly cooling dosage of the heat exchanger heating of indoor heat exchanger 2 increases, and realizes heating capacity
Increase, therefore be more applicable for cold district.When low-temperature heating, heating capacity almost linearly increases with relative intermediate pressure
Trend effectively improves the efficiency of low-temperature heating；It is applied widely, solve the deficiency of original various cold district heating systems.
The above embodiments are merely illustrative of the technical solutions of the present invention and it is non-limiting, referring to preferred embodiment to the present invention into
Detailed description is gone.Those skilled in the art should understand that technical solution of the present invention can be modified or be waited
With replacement, without departing from the spirit and scope of the technical solution of the present invention, should all cover in scope of the presently claimed invention.
Claims (10)
1. one kind is based on solar heat-preservation defrosting Gas-supplying enthalpy-increasing heat pump system characterized by comprising
Refrigeration subsystem and solar heat-preservation subsystem are compressed,
In system accumulation of heat, the solar heat-preservation subsystem is arranged in parallel with the compression refrigeration subsystem, is defrosted in system
When, the solar heat-preservation subsystem is arranged in series with the compression refrigeration subsystem.
2. system according to claim 1, which is characterized in that
The compression refrigeration subsystem includes compressor, indoor heat exchanger, energy storage heat exchanger, economizer, outdoor heat exchanger, gas-liquid
Separator, four-way reversing valve, first throttling device and second throttling device,
The compressor is connected through the arrival end of four-way reversing valve and indoor heat exchanger, the outlet end of the indoor heat exchanger and the
The arrival end of one triple valve connects；
The first exit end of first triple valve is connect with the arrival end of third triple valve,
The second outlet end of first triple valve is sequentially connected the arrival end of flow valve and the second triple valve,
The first exit end of second triple valve is connect with the arrival end of the energy storage heat exchanger,
The outlet end of the energy storage heat exchanger is connect with the arrival end of the 4th triple valve, wherein the first of the 4th triple valve
Outlet end is connect with the first exit end of the third triple valve；
The second outlet end of the third triple valve is connect by first throttling device with the first end of the economizer, the warp
The second end of Ji device, third end are connect with the compressor, second throttling device respectively,
The second throttling device is sequentially connected outdoor heat exchanger, the 5th triple valve, the 6th triple valve, four-way reversing valve and gas
The arrival end of liquid/gas separator, wherein the outlet end of the gas-liquid separator connects the compressor.
3. system according to claim 2, which is characterized in that the second outlet end of second triple valve and the described 6th
One of outlet end of triple valve connects, and wherein the one of the second outlet end of the 4th triple valve and the 5th triple valve
A outlet end connection.
4. system according to claim 3, which is characterized in that when the system is in accumulation of heat mode, refrigerant vapour
Heat exchanger is entered the room after compressor pressurization comes out from four-way reversing valve, heat exchanger is after condensing heat release indoors
Refrigerant liquid two-way is divided by the first triple valve,
Flow valve, the second triple valve are passed sequentially through all the way to enter later after energy storage heat exchanger heat exchange, flow through the 4th threeway later
Valve simultaneously converges at third triple valve with another way refrigerant liquid,
Refrigerant liquid after converging after first throttling device reducing pressure by regulating flow, into economizer with from scroll compressor
The refrigerant vapour of extraction exchanges heat, and the refrigerant liquid after heat exchange enters second throttling device and carries out second throttle decompression,
4th triple valve is closed,
Refrigerant after second throttle decompression passes sequentially through the 5th triple valve and the six or three after entering outdoor heat exchanger heat absorption evaporation
Port valve, four-way reversing valve enter gas-liquid separator, are again introduced into compressor；
The solar heat-preservation subsystem is arranged in parallel in accumulation of heat with compression refrigeration subsystem.
5. system according to claim 3, when the system is in defrosting mode,
Closed under the control action of the controller of the flow valve, from indoor heat exchanger exchange heat out after refrigerant liquid passing through
It crosses after the first triple valve after being directly over third triple valve through first throttling device, economizer, second throttling device is laggard enters the room
External heat exchanger heat absorption evaporation,
4th triple valve is opened,
Refrigerant vapour after heat absorption evaporation enters energy storage heat exchanger and defrosts by the 5th triple valve and the 4th triple valve,
Then successively enter gas-liquid separator through the second triple valve, the 6th triple valve and four-way reversing valve, eventually re-enter
Compressor；
At this point, the compression refrigeration subsystem is arranged in series with solar heat-preservation subsystem.
6. system according to any one of claims 2 to 5, which is characterized in that between the compressor and four-way reversing valve
Pipeline on be additionally provided with high voltage protective switch.
7. system according to any one of claims 1 to 5, which is characterized in that the solar heat-preservation subsystem includes too
It is positive can heat collector, energy storage heat exchanger and pump, the solar thermal collector and pump the successively Outer Tube with the energy storage heat exchanger
Connection setting, wherein the pump is connect with controller；The hot water of solar thermal collector flows through energy storage heat exchanger by pump and is changed
Heat.
8. system according to claim 7, which is characterized in that the coil pipe of the energy storage heat exchanger is passed equipped with the first temperature
Sensor and second temperature sensor, first temperature sensor and second temperature sensor are connected with controller.
9. system according to claim 7, which is characterized in that the energy storage heat exchanger includes the spiral of two different-diameters
The sleeve of coil pipe and two different radiis, wherein the spiral coil of two different-diameters is placed in two institutes of different radii
It states between sleeve, fills heat accumulating phase change material between the spiral coil and the sleeve.
10. system according to claim 9, which is characterized in that the heat accumulating phase change material chooses CaCl2·6H2O, and it is outer
Add the SrCl of mass fraction 2%2·6H2The Ba (OH) of O and mass fraction 2%2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811033627.1A CN109931721A (en) | 2018-09-05 | 2018-09-05 | One kind is based on solar heat-preservation defrosting Gas-supplying enthalpy-increasing heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811033627.1A CN109931721A (en) | 2018-09-05 | 2018-09-05 | One kind is based on solar heat-preservation defrosting Gas-supplying enthalpy-increasing heat pump system |
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| CN109931721A true CN109931721A (en) | 2019-06-25 |
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ID=66984572
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811033627.1A Pending CN109931721A (en) | 2018-09-05 | 2018-09-05 | One kind is based on solar heat-preservation defrosting Gas-supplying enthalpy-increasing heat pump system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686308A (en) * | 2019-10-25 | 2020-01-14 | 东北电力大学 | Solar energy and air source heat pump heat energy graded utilization system |
| CN111102763A (en) * | 2020-01-07 | 2020-05-05 | 珠海格力电器股份有限公司 | System for recycling and utilizing waste heat of cold and hot water unit and using method thereof |
| CN111623568A (en) * | 2020-04-28 | 2020-09-04 | 珠海格力电器股份有限公司 | Refrigerating unit and control method thereof |
| CN114322332A (en) * | 2022-01-20 | 2022-04-12 | 青岛酒店管理职业技术学院 | Solar collector system for melting ice |
| CN114322333A (en) * | 2022-01-20 | 2022-04-12 | 青岛酒店管理职业技术学院 | Solar water heater system with auxiliary heating function |
| CN114593477A (en) * | 2022-03-09 | 2022-06-07 | 同济大学 | Heat storage synergistic air source heat pump system with multiple operation modes and control method thereof |
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2018
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686308A (en) * | 2019-10-25 | 2020-01-14 | 东北电力大学 | Solar energy and air source heat pump heat energy graded utilization system |
| CN110686308B (en) * | 2019-10-25 | 2021-09-07 | 东北电力大学 | Solar energy and air source heat pump heat energy graded utilization system |
| CN111102763A (en) * | 2020-01-07 | 2020-05-05 | 珠海格力电器股份有限公司 | System for recycling and utilizing waste heat of cold and hot water unit and using method thereof |
| CN111102763B (en) * | 2020-01-07 | 2024-03-29 | 珠海格力电器股份有限公司 | System for recovering and utilizing waste heat of cold and hot water unit and use method thereof |
| CN111623568A (en) * | 2020-04-28 | 2020-09-04 | 珠海格力电器股份有限公司 | Refrigerating unit and control method thereof |
| CN114322332A (en) * | 2022-01-20 | 2022-04-12 | 青岛酒店管理职业技术学院 | Solar collector system for melting ice |
| CN114322333A (en) * | 2022-01-20 | 2022-04-12 | 青岛酒店管理职业技术学院 | Solar water heater system with auxiliary heating function |
| CN114593477A (en) * | 2022-03-09 | 2022-06-07 | 同济大学 | Heat storage synergistic air source heat pump system with multiple operation modes and control method thereof |
| CN114593477B (en) * | 2022-03-09 | 2023-07-04 | 同济大学 | Heat accumulation synergistic air source heat pump system with multiple operation modes and control method thereof |
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