CN209246449U - The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of ultralow temperature - Google Patents
The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of ultralow temperature Download PDFInfo
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- CN209246449U CN209246449U CN201822190558.7U CN201822190558U CN209246449U CN 209246449 U CN209246449 U CN 209246449U CN 201822190558 U CN201822190558 U CN 201822190558U CN 209246449 U CN209246449 U CN 209246449U
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of the utility model ultralow temperature, including low-temperature level compressor, low-temperature level four-way valve, the two-way liquid storage device of low-temperature level, low-temperature level device for drying and filtering, low-temperature level electric expansion valve, air cooling fin formula heat exchanger, low-temperature level gas-liquid separator, intermediate evaporating condensation heat exchanger, high-temperature level compressor, high-temperature level four-way valve, high-efficiency tank heat exchanger, two-way liquid storage device, high-temperature level device for drying and filtering, high-temperature level electric expansion valve, high-temperature level gas-liquid separator, low-temperature level refrigerant circulation closed circuit carries out low-temperature heating operation by low-temperature level refrigerant under lower outdoor temperature, high-temperature level refrigerant circulation closed circuit carries out high temperature heating operation by high-temperature level refrigerant, low-temperature level refrigerant circulation closed circuit is passed into high-temperature level refrigerant circulation closed circuit by intermediate evaporating condensation heat exchanger from the heat that the external world absorbs, It finally realizes and also can achieve higher leaving water temperature when low temperature in winter, hot water supply water temperature can reach 85 DEG C.
Description
Technical field
The utility model relates to technical field of heat pumps, and in particular to a kind of Cascade type heat pump system.
Background technique
Traditional heating system is mainly using the high-order energy of consumption combustion gas or coal etc., by boiler and the circulatory system to building
The heat of high temperature is provided in object room, it can be to wastes such as environmental emission waste heat, exhaust gas, waste residues.Based on it is energy saving with avoid environment
An urgent demand of pollution, this heating system have been unable to satisfy the energy, for the demand for harmonious development of warming up.This technology at present
Field mainly uses heat pump techniques to solve the problems, such as heating energy consumption and harmonious development.
Air source heat pump is using outdoor air as low-temperature heat source, since air source is wide, and cleans freely, this is air-source
Heat pump provides the foundation as a kind of excellent energy-saving heating technology.However, when outdoor temperature is lower in winter, such as ring in winter
Under limiting condition of the border temperature lower than -25 DEG C, existing Air-Cooled Heat Pump Unit is unable to run；When being lower than -15 DEG C such as environment temperature,
Its working efficiency significantly reduces, in order to guarantee that the ratio of Compressor Discharge Pressure and pressure of inspiration(Pi) is in design requirement range
Interior, pressure ratio cannot be excessive, and the supply water temperature that unit is run steadily in the long term can only achieve 45 DEG C.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of high leaving water temperature superposition type air-cooled heat pump machines of ultralow temperature
Group can solve the problem of net for air-source heat pump units can not provide high-temperature-hot-water under extremely low environment temperature, and unit is normal
The limiting ambient temperature of operating can achieve -40 DEG C, and hot water supply water temperature can reach 85 DEG C.
The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of the utility model ultralow temperature, including low-temperature level compressor, low-temperature level
It is the two-way liquid storage device of four-way valve, low-temperature level, low-temperature level device for drying and filtering, low-temperature level electric expansion valve, air cooling fin formula heat exchanger, low
It is warm grade gas-liquid separator, intermediate evaporating condensation heat exchanger, high-temperature level compressor, high-temperature level four-way valve, high-efficiency tank heat exchanger, two-way
Liquid storage device, high-temperature level device for drying and filtering, high-temperature level electric expansion valve, high-temperature level gas-liquid separator, the low-temperature level compressor
Exhaust outlet is connected with the A1 of low-temperature level four-way valve mouth, and the B1 mouth of low-temperature level four-way valve enters with the first of intermediate evaporating condensation heat exchanger
Mouth is connected, and the first outlet of intermediate evaporating condensation heat exchanger is connected with the entrance of the two-way liquid storage device of low-temperature level, the two-way storage of low-temperature level
The outlet of liquid device is connected with the entrance of low-temperature level device for drying and filtering, the outlet of low-temperature level device for drying and filtering and low-temperature level electronic expansion
The entrance of valve is connected, and the outlet of low-temperature level electric expansion valve is connected with the entrance of air cooling fin formula heat exchanger, and air cooling fin formula is changed
The outlet of hot device is connected with the D1 of low-temperature level four-way valve mouth, the entrance of the C1 mouth and low-temperature level gas-liquid separator of low-temperature level four-way valve
It is connected, the outlet of low-temperature level gas-liquid separator is connected with the air entry of low-temperature level compressor, the exhaust of the high-temperature level compressor
Mouth is connected with the A2 of high-temperature level four-way valve mouth, and the D2 mouth of high-temperature level four-way valve is connected with the first entrance of high-efficiency tank heat exchanger, high
The first outlet of effect tank heat exchanger is connected with the entrance of two-way liquid storage device, the outlet of two-way liquid storage device and high-temperature level device for drying and filtering
Entrance be connected, the outlet of high-temperature level device for drying and filtering is connected with the entrance of high-temperature level electric expansion valve, high-temperature level electronic expansion
The outlet of valve is connected with the second entrance of the intermediate evaporating condensation heat exchanger, the second outlet of intermediate evaporating condensation heat exchanger with
The B2 mouth of high-temperature level four-way valve is connected, and the C2 mouth of high-temperature level four-way valve is connected with the entrance of high-temperature level gas-liquid separator, high-temperature level
The outlet of gas-liquid separator is connected with the air entry of high-temperature level compressor, and high-efficiency tank heat exchanger and user side hot water exchange heat.
The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of the utility model ultralow temperature, wherein further include hydrojet solenoid valve and
The entrance of hand valve, the hydrojet solenoid valve is connected with the outlet of low-temperature level device for drying and filtering, the outlet of the hydrojet solenoid valve with
The entrance of hand valve is connected, and the outlet of the hand valve is connected with the air entry of the low-temperature level compressor.
The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of the utility model ultralow temperature, wherein the air cooling fin formula heat exchange
Device has blower.
The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of the utility model ultralow temperature, wherein the low-temperature level compressor is adopted
Use screw compressor.
The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of the utility model ultralow temperature, wherein the high-temperature level compressor is adopted
Use screw compressor.
The high leaving water temperature superposition type Air-Cooled Heat Pump Unit difference from prior art of the utility model ultralow temperature is this
In the high leaving water temperature superposition type Air-Cooled Heat Pump Unit of utility model ultralow temperature, low-temperature level compressor, low-temperature level four-way valve, low-temperature level
Two-way liquid storage device, low-temperature level device for drying and filtering, low-temperature level electric expansion valve, air cooling fin formula heat exchanger, low-temperature level gas-liquid separation
Side (evaporation side) the composition low-temperature level refrigerant circulation closed circuit of device and intermediate evaporating condensation heat exchanger, high-temperature level compressor,
High-temperature level four-way valve, high-efficiency tank heat exchanger, two-way liquid storage device, high-temperature level device for drying and filtering, high-temperature level electric expansion valve, high-temperature level
The other side (condensation side) of gas-liquid separator and intermediate evaporating condensation heat exchanger constitutes high-temperature level refrigerant circulation closed circuit, first benefit
With low-temperature level refrigerant circulation closed circuit, by low-temperature level refrigerant, under lower outdoor temperature (- 40 DEG C~10 DEG C) carry out low temperature system
Heat operation, recycles high-temperature level refrigerant circulation closed circuit to carry out high temperature heating operation by high-temperature level refrigerant, thus by low temperature
Grade refrigerant circulation closed circuit passes to high-temperature level refrigerant circulation by intermediate evaporating condensation heat exchanger from the heat that the external world absorbs
Closed circuit is finally realized and also can achieve higher leaving water temperature when low temperature in winter, and heating effect is good, what unit ran well
Limiting ambient temperature can achieve -40 DEG C, and hot water supply water temperature can reach 85 DEG C.
The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of the ultralow temperature of the utility model is made with reference to the accompanying drawing further
Explanation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the high leaving water temperature superposition type Air-Cooled Heat Pump Unit of the utility model ultralow temperature；Wherein:
11- low-temperature level compressor；12- low-temperature level four-way valve；The two-way liquid storage device of 13- low-temperature level；14- low-temperature level dry filter
Device；15- low-temperature level electric expansion valve；16- air cooling fin formula heat exchanger；17- low-temperature level gas-liquid separator；18- hydrojet solenoid valve；
19- hand valve；Evaporating condensation heat exchanger among 20-；21- high-temperature level compressor；22- high-temperature level four-way valve；The heat exchange of 23- high-efficiency tank
Device；The two-way liquid storage device of 24-；25- high-temperature level device for drying and filtering；26- high-temperature level electric expansion valve；27- high-temperature level gas-liquid separator.
Specific embodiment
As shown in Figure 1, the high leaving water temperature superposition type Air-Cooled Heat Pump Unit of the utility model ultralow temperature includes low-temperature level compression
The two-way liquid storage device 13 of machine 11, low-temperature level four-way valve 12, low-temperature level, low-temperature level device for drying and filtering 14, low-temperature level electric expansion valve 15,
Air cooling fin formula heat exchanger 16, low-temperature level gas-liquid separator 17, hydrojet solenoid valve 18, hand valve 19, intermediate evaporating condensation heat exchanger
20, high-temperature level compressor 21, high-temperature level four-way valve 22, high-efficiency tank heat exchanger 23, two-way liquid storage device 24, high-temperature level device for drying and filtering
25, high-temperature level electric expansion valve 26, high-temperature level gas-liquid separator 27, the exhaust outlet and low-temperature level four-way valve of low-temperature level compressor 11
12 A1 mouth is connected, and the B1 mouth of low-temperature level four-way valve 12 is connected with the first entrance of intermediate evaporating condensation heat exchanger 20, and centre is steamed
The first outlet of hair condensing heat exchanger 20 is connected with the entrance of the two-way liquid storage device 13 of low-temperature level, and the two-way liquid storage device 13 of low-temperature level goes out
Mouth is connected with the entrance of low-temperature level device for drying and filtering 14, the outlet of low-temperature level device for drying and filtering 14 and low-temperature level electric expansion valve 15
Entrance be connected, the outlet of low-temperature level electric expansion valve 15 is connected with the entrance of air cooling fin formula heat exchanger 16, air cooling fin formula
The outlet of heat exchanger 16 is connected with the D1 of low-temperature level four-way valve 12 mouth, and air cooling fin formula heat exchanger 16 has blower, low-temperature level four
The C1 mouth of port valve 12 is connected with the entrance of low-temperature level gas-liquid separator 17, the outlet and low-temperature level pressure of low-temperature level gas-liquid separator 17
The air entry of contracting machine 11 is connected, and the exhaust outlet of high-temperature level compressor 21 is connected with the A2 of high-temperature level four-way valve 22 mouth, high-temperature level four
The D2 mouth of port valve 22 is connected with the first entrance of high-efficiency tank heat exchanger 23, the first outlet of high-efficiency tank heat exchanger 23 and two-way liquid storage
The entrance of device 24 is connected, and the outlet of two-way liquid storage device 24 is connected with the entrance of high-temperature level device for drying and filtering 25, and high-temperature level is dried
The outlet of filter 25 is connected with the entrance of high-temperature level electric expansion valve 26, the outlet of high-temperature level electric expansion valve 26 and intermediate evaporation
The second entrance of condensing heat exchanger 20 is connected, the second outlet of intermediate evaporating condensation heat exchanger 20 and the B2 of high-temperature level four-way valve 22
Mouth is connected, and the C2 mouth of high-temperature level four-way valve 22 is connected with the entrance of high-temperature level gas-liquid separator 27, high-temperature level gas-liquid separator 27
Outlet be connected with the air entry of high-temperature level compressor 21, high-efficiency tank heat exchanger 23 and user side hot water exchange heat, hydrojet solenoid valve
18 entrance is connected with the outlet of low-temperature level device for drying and filtering 14, and the outlet of hydrojet solenoid valve 18 is connected with the entrance of hand valve 19,
The outlet of hand valve 19 is connected with the air entry of low-temperature level compressor 11.
In the high leaving water temperature superposition type Air-Cooled Heat Pump Unit of the utility model ultralow temperature, low-temperature level compressor 11 is using vortex
Compressor, high-temperature level compressor 21 use screw compressor.
When winter heating, the A1 mouth of low-temperature level four-way valve 12, B1 mouthfuls of connections, D1 mouthfuls, C1 mouthfuls of connections, high-temperature level four-way valve 22
A2 mouth, D2 mouthfuls connection, B2 mouthful, C2 mouthfuls be connected to, the high leaving water temperature superposition type Air-Cooled Heat Pump Unit of the utility model ultralow temperature
The course of work is as follows: low-temperature level refrigerant, which is compressed by low-temperature level compressor 11 from low-temp low-pressure gaseous state, becomes high temperature and pressure gas
State, A1 mouth, B1 mouthful entrance intermediate evaporating condensation heat exchangers of the gaseous refrigerant of high temperature and pressure by low-temperature level four-way valve 12
20 exchange heat with the gas-liquid two-phase working medium of high-temperature level, become high-pressure liquid working medium, and high-pressure liquid working medium passes through low-temperature level electronic expansion
The throttling of valve 15 becomes low-pressure gas-liquid two-phase state, and gas-liquid two-phase working medium absorbs outside air by low-temperature level finned heat exchanger 16
Heat, becomes low-pressure gaseous working medium, D1 mouth of the low-pressure gaseous working medium through low-temperature level four-way valve 12, C1 mouthfuls, into low-temperature level gas-liquid
Separator 17 returns to low-temperature level compressor 11 after carrying out gas-liquid separation.
High-temperature level refrigeration agent, which is compressed by high-temperature level compressor 21 from low temperature low pressure gas, becomes high temperature and high pressure gas, high temperature
The refrigerant of high pressure exchanges heat by high-efficiency tank heat exchanger 23 and user side hot water, becomes high-pressure liquid.High-pressure liquid working medium is passed through
The throttling of high-temperature level electric expansion valve 26 becomes low-pressure gas-liquid two-phase state, and gas-liquid two-phase working medium enters intermediate evaporating condensation heat exchanger
20 exchange heat with the high pressure gaseous working medium of low-temperature level, become low-temp low-pressure gaseous working medium.
Hydrojet solenoid valve 18 and hand valve 19 constitute hydrojet protective device, carry out hydrojet protection: high-pressure liquid work to compressor
Matter is connected through hydrojet solenoid valve 18, hand valve 19 with the air entry of low-temperature level compressor 11, can be in the extremely low situation of environment temperature
Hydrojet solenoid valve 18 is opened, the delivery temperature of low-temperature level compressor 11 is reduced by hydrojet, guarantees compressor efficient stable fortune
Row.
In the high leaving water temperature superposition type Air-Cooled Heat Pump Unit of the utility model ultralow temperature, low-temperature level compressor, low-temperature level four
The two-way liquid storage device of port valve, low-temperature level, low-temperature level device for drying and filtering, low-temperature level electric expansion valve, air cooling fin formula heat exchanger, low temperature
The side (evaporation side) of grade gas-liquid separator and intermediate evaporating condensation heat exchanger constitutes low-temperature level refrigerant circulation closed circuit, high temperature
Grade compressor, high-temperature level four-way valve, high-efficiency tank heat exchanger, two-way liquid storage device, high-temperature level device for drying and filtering, high-temperature level electronic expansion
The other side (condensation side) of valve, high-temperature level gas-liquid separator and intermediate evaporating condensation heat exchanger constitutes high-temperature level refrigerant circulation closure
Circuit, first with low-temperature level refrigerant circulation closed circuit by low-temperature level refrigerant under lower outdoor temperature such as -40 DEG C~10
Low-temperature heating operation is carried out between DEG C, and high-temperature level refrigerant circulation closed circuit is recycled to carry out high temperature heating by high-temperature level refrigerant
Operation, so that low-temperature level refrigerant circulation closed circuit be passed to from the heat that the external world absorbs by intermediate evaporating condensation heat exchanger
High-temperature level refrigerant circulation closed circuit is finally realized and also can achieve higher leaving water temperature when low temperature in winter, and heating effect is good.
The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of the utility model ultralow temperature, the limiting ambient temperature that unit runs well can reach
To -40 DEG C, hot water supply water temperature can reach 85 DEG C.
The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of the utility model ultralow temperature compared with prior art, has efficiently section
Energy, Energy Efficiency Ratio are high, structure is simplified, the wider array of feature of Applicable temperature range.
Above embodiment is only that preferred embodiments of the present invention are described, not to the utility model
Range be defined, under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this is practical
The various changes and improvements that novel technical solution is made should all fall into the protection scope that the utility model claims book determines
It is interior.
Claims (5)
1. a kind of high leaving water temperature superposition type Air-Cooled Heat Pump Unit of ultralow temperature, it is characterised in that: including low-temperature level compressor (11),
Low-temperature level four-way valve (12), the two-way liquid storage device of low-temperature level (13), low-temperature level device for drying and filtering (14), low-temperature level electric expansion valve
(15), air cooling fin formula heat exchanger (16), low-temperature level gas-liquid separator (17), intermediate evaporating condensation heat exchanger (20), high-temperature level
Compressor (21), high-temperature level four-way valve (22), high-efficiency tank heat exchanger (23), two-way liquid storage device (24), high-temperature level device for drying and filtering
(25), high-temperature level electric expansion valve (26), high-temperature level gas-liquid separator (27),
The exhaust outlet of the low-temperature level compressor (11) is connected with the A1 mouth of low-temperature level four-way valve (12), low-temperature level four-way valve (12)
B1 mouth be connected with the first entrance of intermediate evaporating condensation heat exchanger (20), the first outlet of intermediate evaporating condensation heat exchanger (20)
It is connected with the entrance of the two-way liquid storage device of low-temperature level (13), the outlet of the two-way liquid storage device of low-temperature level (13) and low-temperature level device for drying and filtering
(14) entrance is connected, and the outlet of low-temperature level device for drying and filtering (14) is connected with the entrance of low-temperature level electric expansion valve (15), low
The outlet of warm grade electric expansion valve (15) is connected with the entrance of air cooling fin formula heat exchanger (16), air cooling fin formula heat exchanger (16)
Outlet be connected with the D1 mouth of low-temperature level four-way valve (12), the C1 mouth of low-temperature level four-way valve (12) and low-temperature level gas-liquid separator
(17) entrance is connected, and the outlet of low-temperature level gas-liquid separator (17) is connected with the air entry of low-temperature level compressor (11),
The exhaust outlet of the high-temperature level compressor (21) is connected with the A2 mouth of high-temperature level four-way valve (22), high-temperature level four-way valve (22)
D2 mouth be connected with the first entrance of high-efficiency tank heat exchanger (23), the first outlet of high-efficiency tank heat exchanger (23) and two-way liquid storage device
(24) entrance is connected, and the outlet of two-way liquid storage device (24) is connected with the entrance of high-temperature level device for drying and filtering (25), and high-temperature level is dry
The outlet of dry filter (25) is connected with the entrance of high-temperature level electric expansion valve (26), the outlet of high-temperature level electric expansion valve (26)
Be connected with the second entrance of the intermediate evaporating condensation heat exchanger (20), the second outlet of intermediate evaporating condensation heat exchanger (20) with
The B2 mouth of high-temperature level four-way valve (22) is connected, the entrance of the C2 mouth and high-temperature level gas-liquid separator (27) of high-temperature level four-way valve (22)
It is connected, the outlet of high-temperature level gas-liquid separator (27) is connected with the air entry of high-temperature level compressor (21), high-efficiency tank heat exchanger
(23) it exchanges heat with user side hot water.
2. the high leaving water temperature superposition type Air-Cooled Heat Pump Unit of ultralow temperature according to claim 1, it is characterised in that: further include
Hydrojet solenoid valve (18) and hand valve (19), the entrance of the hydrojet solenoid valve (18) and the outlet of low-temperature level device for drying and filtering (14)
Be connected, the outlet of the hydrojet solenoid valve (18) is connected with the entrance of hand valve (19), the outlet of the hand valve (19) with it is described low
The air entry of warm grade compressor (11) is connected.
3. the high leaving water temperature superposition type Air-Cooled Heat Pump Unit of ultralow temperature according to claim 2, it is characterised in that: the wind
Cold finned heat exchanger (16) has blower.
4. the high leaving water temperature superposition type Air-Cooled Heat Pump Unit of ultralow temperature according to claim 3, it is characterised in that: described low
Warm grade compressor (11) uses screw compressor.
5. the high leaving water temperature superposition type Air-Cooled Heat Pump Unit of ultralow temperature according to claim 4, it is characterised in that: the height
Warm grade compressor (21) uses screw compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822190558.7U CN209246449U (en) | 2018-12-20 | 2018-12-20 | The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of ultralow temperature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822190558.7U CN209246449U (en) | 2018-12-20 | 2018-12-20 | The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of ultralow temperature |
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| CN209246449U true CN209246449U (en) | 2019-08-13 |
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ID=67534639
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| CN201822190558.7U Active CN209246449U (en) | 2018-12-20 | 2018-12-20 | The high leaving water temperature superposition type Air-Cooled Heat Pump Unit of ultralow temperature |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608539A (en) * | 2019-11-05 | 2019-12-24 | 烟台欧森纳地源空调股份有限公司 | Cascade high-temperature heat pump system |
| CN110701664A (en) * | 2019-11-11 | 2020-01-17 | 江苏天舒电器有限公司 | Wide-ring-temperature multi-stage water outlet variable-frequency air energy cascade type heat engine system and working method thereof |
| CN113551441A (en) * | 2021-08-02 | 2021-10-26 | 姜春辉 | Heat pump set |
| CN113776234A (en) * | 2021-09-27 | 2021-12-10 | 陕西凯尔利尼冷冻空调有限公司 | Method for utilizing heat in low-temperature air |
| CN118596785A (en) * | 2024-07-31 | 2024-09-06 | 比亚迪股份有限公司 | Heat pump assist device, heat pump system, control method for heat pump system, and vehicle |
-
2018
- 2018-12-20 CN CN201822190558.7U patent/CN209246449U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608539A (en) * | 2019-11-05 | 2019-12-24 | 烟台欧森纳地源空调股份有限公司 | Cascade high-temperature heat pump system |
| CN110701664A (en) * | 2019-11-11 | 2020-01-17 | 江苏天舒电器有限公司 | Wide-ring-temperature multi-stage water outlet variable-frequency air energy cascade type heat engine system and working method thereof |
| CN110701664B (en) * | 2019-11-11 | 2023-05-05 | 江苏天舒电器有限公司 | Wide-ring-temperature multistage water outlet variable-frequency air energy cascade heat engine system and working method thereof |
| CN113551441A (en) * | 2021-08-02 | 2021-10-26 | 姜春辉 | Heat pump set |
| CN113776234A (en) * | 2021-09-27 | 2021-12-10 | 陕西凯尔利尼冷冻空调有限公司 | Method for utilizing heat in low-temperature air |
| CN118596785A (en) * | 2024-07-31 | 2024-09-06 | 比亚迪股份有限公司 | Heat pump assist device, heat pump system, control method for heat pump system, and vehicle |
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