Air-cooling and water-cooling dual-purpose heat pump air conditioning unit and system
By designing air-cooled, water-cooled dual-purpose heat pump and air-conditioning units and optimizing the refrigerant process with multiple components, the problem of low cooling efficiency of water-cooled units in winter and air-cooled units is solved, and efficient and low-cost operation of cooling and heating throughout the year is achieved.
Patent Information
- Application Number
- CN202421710565.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-07-19
AI Technical Summary
The existing water-cooled chiller cannot heat up in winter, and other heat sources such as boilers need to be installed, resulting in high investment, large area and complex operation and maintenance; the air-cooled heat pump unit has low refrigeration efficiency, small energy efficiency ratio, and high operating costs.
Design an air-cooled, water-cooled dual-purpose heat pump and air-conditioning unit, combining compressor, four-way reversing valve, air-liquid separator, solenoid valve and heat exchanger, to realize the switching of refrigeration and heating conditions, and use the combination of outdoor side air-cooled heat exchanger and water-cooled heat exchanger to optimize the refrigerant process.
It has achieved the demand for cooling and heating throughout the year, without the need for additional heat sources, reduces equipment investment and operation and maintenance costs, improves refrigeration performance, reduces carbon emissions, and has high operating reliability.
Smart Images
Figure CN223294954U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat pump air-conditioning units, in particular to an air-cooled and water-cooled dual-purpose heat pump air-conditioning unit and system. Background Art
[0002] For water-cooled chillers using cooling towers, since water-cooled chillers can only cool but not heat in winter, it is usually necessary to set up another heat source such as a boiler for winter heating. That is, two systems must be set up at the same time to meet the cooling and heating needs throughout the year, which requires high investment, large floor space, and complex operation and maintenance.
[0003] However, heat sources like boilers are often subject to numerous constraints, including natural gas availability and environmental concerns. Furthermore, boilers carry a certain explosion hazard. Where such heat sources are unavailable, air-cooled heat pumps are often used to provide year-round heating and cooling. However, in cooling conditions, air-cooled heat pumps have a significantly lower energy efficiency than water-cooled chillers, at only 50-65% of that of water-cooled chillers. This results in significantly lower cooling efficiency than water-cooled chillers, significantly increasing operational costs. This is particularly true in southern China, where cooling hours are longer, leading to significant air conditioning and cooling operating expenses.
[0004] At present, the technical means to improve the summer cooling performance of air-cooled heat pumps mainly focus on improving the performance of the compressor, including the use of magnetic levitation compressors, DC variable frequency compressors, etc. However, no matter how much the compressor performance is improved, it is still unable to break through the existing laws of thermodynamics, and the cooling performance is still far lower than that of water-cooled chillers. Utility Model Content
[0005] The purpose of the present invention is to provide an air-cooled and water-cooled dual-purpose heat pump air-conditioning unit and system to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: an air-cooled and water-cooled dual-purpose heat pump air-conditioning unit, comprising:
[0007] The compressor is connected to the four-way reversing valve and the gas-liquid separator, the four-way reversing valve is connected to the gas-liquid separator, the third solenoid valve and the fourth solenoid valve, the fourth solenoid valve is connected to the outdoor air-cooled heat exchanger, the outdoor air-cooled heat exchanger is connected to the fan, the outdoor air-cooled heat exchanger is connected to the fifth solenoid valve, and the fifth solenoid valve is connected to the second solenoid valve, the second one-way valve and the first one-way valve.
[0008] Preferably, the four-way reversing valve is connected to the indoor heat exchanger, the indoor heat exchanger is connected to the third one-way valve and the fourth one-way valve, the third one-way valve is connected to the second one-way valve, the fourth one-way valve is connected to the first one-way valve, and the second one-way valve and the third one-way valve are both connected to the liquid storage tank.
[0009] Preferably, the first one-way valve and the fourth one-way valve are both connected to the electronic expansion valve, the liquid storage tank is connected to the sight glass, the sight glass is connected to the drying filter, the drying filter is connected to the first solenoid valve, the first solenoid valve is connected to the electronic expansion valve, the second solenoid valve is connected to the outdoor water-cooled heat exchanger, and the outdoor water-cooled heat exchanger is connected to the sixth solenoid valve and the seventh solenoid valve.
[0010] Preferably, the seventh solenoid valve is connected to the eighth solenoid valve, the eighth solenoid valve is connected to the first manual valve, the first manual valve is connected to the second manual valve, and the sixth solenoid valve is connected to the cooling water circulation pump.
[0011] Preferably, the cooling water circulation pump is connected to the cooling water processor, the cooling water processor is connected to the second manual valve, and the first manual valve and the second manual valve are both connected to the first cooling tower and the second cooling tower.
[0012] Preferably, the number of cooling towers is not limited.
[0013] An air-cooled and water-cooled dual-purpose heat pump air-conditioning system comprises the above-mentioned air-cooled and water-cooled dual-purpose heat pump air-conditioning unit.
[0014] Compared with the prior art, the beneficial effects of the present invention are:
[0015] This utility model 1. can solve the problem that the water-cooling unit cannot generate heat, avoid setting up separate heat sources such as air-cooled heat pumps and boilers when setting up the water-cooling unit, and reduce equipment investment costs; reduce equipment and components, reduce the area of the machine room, etc., and improve the utilization rate of the building area.
[0016] 2. It can improve the problems of low refrigeration performance and high operating energy consumption of air-cooled heat pump units, greatly improve refrigeration performance, reduce operating costs, reduce carbon dioxide emissions, save energy, and be environmentally friendly, fundamentally solving the problem of low refrigeration efficiency of air-cooled heat pumps or air source heat pump units.
[0017] 3. The structure is simple, and the size of the outdoor unit increases less, especially for systems with external water-cooled heat exchangers. Compared with conventional air-cooled heat pump units, the size of the outdoor unit is almost the same; the control logic is clear, and the operation is simple and reliable; compared with energy combinations such as water cooling + air cooling or water cooling + boiler, this system has fewer components, simpler combinations, reliable and stable operation, and low operation and maintenance workload. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a diagram showing the partial working principle of the utility model's outdoor water-cooled heat exchanger with a built-in air-cooled and water-cooled dual-purpose heat pump air-conditioning unit and the system;
[0019] Figure 2 This is a diagram showing the working principle of the utility model's outdoor water-cooled heat exchanger with a built-in air-cooled and water-cooled dual-purpose heat pump air-conditioning unit and the system.
[0020] In the figure: 1. Compressor; 2. Four-way reversing valve; 3. Indoor heat exchanger; 4. Fan; 5. Outdoor air-cooled heat exchanger; 6. Outdoor water-cooled heat exchanger; 7. First one-way valve; 8. Second one-way valve; 9. Third one-way valve; 10. Fourth one-way valve; 11. Liquid storage tank; 12. Sight glass; 13. Dry filter; 14. First solenoid valve; 15. Electronic expansion valve; 16. Second solenoid valve; 17. Gas-liquid separator; 18. Third solenoid valve; 19. Fourth solenoid valve; 20. Fifth solenoid valve; 21. Sixth solenoid valve; 22. Seventh solenoid valve; 23. First cooling tower; 24. Second cooling tower; 25. Cooling water processor; 26. Cooling water circulation pump; 27. Eighth solenoid valve; 28. First manual valve; 29. Second manual valve. DETAILED DESCRIPTION
[0021] In order to clearly and completely describe the purpose and technical solution of the present invention and make its advantages more clearly understood, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0022] See also Figures 1 to 2 The utility model provides a technical solution: an air-cooled and water-cooled dual-purpose heat pump air-conditioning unit, comprising:
[0023] Compressor 1, compressor 1 is connected to the four-way reversing valve 2 and the gas-liquid separator 17, the four-way reversing valve 2 is connected to the gas-liquid separator 17, the third solenoid valve 18 and the fourth solenoid valve 19, the fourth solenoid valve 19 is connected to the outdoor air-cooled heat exchanger 5, the outdoor air-cooled heat exchanger 5 is connected to the fan 4, the outdoor air-cooled heat exchanger 5 is connected to the fifth solenoid valve 20, the fifth solenoid valve 20 is connected to the second solenoid valve 16, the second one-way valve 8 and the first one-way valve 7, the four-way reversing valve 2 is connected to the indoor heat exchanger 3, the indoor heat exchanger 3 is connected to the third one-way valve 9 and the fourth one-way valve 10, the third one-way valve 9 is connected to the second one-way valve 8, the fourth one-way valve 10 is connected to the first one-way valve 7, and the second one-way valve 8 and the third one-way valve 9 are both connected to the liquid storage tank 11;
[0024] The first one-way valve 7 and the fourth one-way valve 10 are both connected to the electronic expansion valve 15, the liquid storage tank 11 is connected to the sight glass 12, the sight glass 12 is connected to the drying filter 13, the drying filter 13 is connected to the first solenoid valve 14, the first solenoid valve 14 is connected to the electronic expansion valve 15, the second solenoid valve 16 is connected to the outdoor water-cooled heat exchanger 6, the outdoor water-cooled heat exchanger 6 is connected to the sixth solenoid valve 21 and the seventh solenoid valve 22, the seventh solenoid valve 22 is connected to the eighth solenoid valve 27, the eighth solenoid valve 27 is connected to the first manual valve 28, the first manual valve 28 is connected to the second manual valve 29, the sixth solenoid valve 21 is connected to the cooling water circulation pump 26, the cooling water circulation pump 26 is connected to the cooling water processor 25, the cooling water processor 25 is connected to the second manual valve 29, and the first manual valve 28 and the second manual valve 29 are both connected to the first cooling tower 23 and the second cooling tower 24.
[0025] The outdoor water-cooled heat exchanger has a built-in air-cooled and water-cooled dual-purpose heat pump air-conditioning unit and the system cooling working process:
[0026] Heat pump air conditioning unit side: After the unit's circulating refrigerant is pressurized and heated by the compressor 1, it becomes high-pressure gas and enters the four-way reversing valve 2. Under the cooling condition, the fourth solenoid valve 19 and the fifth solenoid valve 20 are closed, and the second solenoid valve 16 and the third solenoid valve 18 are opened. The refrigerant flows into the outdoor water-cooled heat exchanger 6 through the third solenoid valve 18, and transfers the refrigerant heat to the cooling water system through the coil in the condenser. The refrigerant releases heat and changes from high-pressure gas to high-pressure liquid. Then, it flows into the second one-way valve 8 through the second solenoid valve 16, and after reversing, it flows into the liquid storage tank 11 through the second one-way valve 8. It flows through the sight glass 12 and enters the drying filter for drying and filtering impurities. It passes through the first solenoid valve 14 and enters the electronic expansion valve 15 for pressure reduction and cooling, and changes from high-pressure liquid to low-pressure liquid. The circulating refrigerant achieves cooling. It then flows into the evaporator through the fourth one-way valve 10, absorbs the heat of the medium on the user side through the coil inside the evaporator, reduces the temperature of the medium on the user side, and realizes cooling. After flowing out of the evaporator, it changes direction through the four-way reversing valve 2 and flows into the gas-liquid separator 17 for gas-liquid separation to prevent gas from entering the compressor. The separated liquid enters the compressor 1 for the next round of circulation.
[0027] Outdoor cooling side: Under the cooling condition, the sixth solenoid valve 21 and the seventh solenoid valve 22 are in the open state, and high-temperature cooling water flows out from the outdoor water-cooled heat exchanger 6, and flows into the first cooling tower 23 and the second cooling tower 24 through the seventh solenoid valve 22. The number of cooling towers is not limited, and they can be matched with air-cooled water-cooled heat pump units according to specific circumstances. After releasing heat in the cooling tower, it becomes low-temperature cooling water, which is filtered and purified by the water treatment unit 25 and enters the circulating water pump 26. After being pressurized, it flows into the outdoor water-cooled heat exchanger 6 through the sixth solenoid valve 21, absorbs the heat of the circulating refrigerant of the unit, absorbs heat and heats up, becomes high-temperature cooling water and flows out from the outdoor water-cooled heat exchanger 6 for the next cycle.
[0028] The outdoor water-cooled heat exchanger has a built-in air-cooled and water-cooled dual-purpose heat pump air-conditioning unit and the system heating working process:
[0029] Heat pump air conditioning unit side: The circulating refrigerant of the unit is pressurized and heated by the compressor 1, and then becomes high-pressure and high-temperature gas, enters the four-way reversing valve 2, and flows into the heat exchanger 3 after reversing. The high-pressure and high-temperature gas releases heat to the user side medium through the coil in the heat exchanger, raising the temperature of the user side medium to achieve heating. The high-pressure and high-temperature gas releases heat and becomes high-pressure liquid, flows into the liquid storage tank 11 through the third one-way valve 9, flows through the sight glass 12, enters the drying filter for drying and filtering impurities, passes through the first solenoid valve 14 and enters the electronic expansion valve 15 for pressure reduction and cooling, and is cooled by the high-pressure liquid. The refrigerant is cooled by the air-cooling device 11 and then flows into the fifth solenoid valve 20 in the open state through the one-way valve 7, and then flows into the outdoor air-cooled heat exchanger 5 through the fifth solenoid valve 20. The heat of the circulating refrigerant is transferred to the outdoor air through the mechanical ventilation of the fan 4. The refrigerant releases heat and changes from a low-pressure liquid to a low-pressure liquid. It flows into the four-way reversing valve 2 through the fourth solenoid valve 19 in the open state. After reversing, it flows into the gas-liquid separator 17 for gas-liquid separation to prevent gas from entering the compressor. The separated liquid enters the compressor 1 for the next cycle. At this time, the third solenoid valve 18, the second solenoid valve 16, the sixth solenoid valve 21, and the seventh solenoid valve 22 are all in the closed state. On the outdoor cooling side: the cooling tower and the supporting cooling water system are all in the closed state. The outdoor water-cooled heat exchanger is externally mounted with an air-cooled and water-cooled dual-purpose heat pump air-conditioning unit and the system cooling and heating working process: the outdoor water-cooled heat exchanger is externally mounted with an air-cooled and water-cooled dual-purpose heat pump air-conditioning unit and the system cooling and heating working process are basically the same as the built-in system. The difference is that placing the outdoor water-cooled heat exchanger outside the unit can reduce the number of outdoor water-cooled heat exchangers, reduce the size of the air-cooled and water-cooled dual-purpose heat pump unit, and reduce equipment costs.
[0030] Although the above describes the illustrative specific implementation methods of the present application so that those skilled in the art can understand the present application, the present application is not limited to the scope of the specific implementation methods. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations based on the concept of the present application are protected.
Claims
1. An air-cooled and water-cooled dual-purpose heat pump air-conditioning unit, characterized in that: include: The compressor (1) is connected to a four-way reversing valve (2) and a gas-liquid separator (17), the four-way reversing valve (2) is connected to the gas-liquid separator (17), the third solenoid valve (18) and the fourth solenoid valve (19), the fourth solenoid valve (19) is connected to an outdoor air-cooled heat exchanger (5), the outdoor air-cooled heat exchanger (5) is connected to a fan (4), the outdoor air-cooled heat exchanger (5) is connected to a fifth solenoid valve (20), and the fifth solenoid valve (20) is connected to a second solenoid valve (16), a second one-way valve (8) and a first one-way valve (7).
2. The air-cooled and water-cooled dual-purpose heat pump air-conditioning unit according to claim 1, characterized in that: The four-way reversing valve (2) is connected to the indoor heat exchanger (3), the indoor heat exchanger (3) is connected to the third one-way valve (9) and the fourth one-way valve (10), the third one-way valve (9) is connected to the second one-way valve (8), the fourth one-way valve (10) is connected to the first one-way valve (7), and the second one-way valve (8) and the third one-way valve (9) are both connected to the liquid storage tank (11).
3. The air-cooled and water-cooled dual-purpose heat pump air-conditioning unit according to claim 2, characterized in that: The first one-way valve (7) and the fourth one-way valve (10) are both connected to the electronic expansion valve (15), the liquid storage tank (11) is connected to the sight glass (12), the sight glass (12) is connected to the drying filter (13), the drying filter (13) is connected to the first solenoid valve (14), the first solenoid valve (14) is connected to the electronic expansion valve (15), the second solenoid valve (16) is connected to the outdoor water-cooled heat exchanger (6), and the outdoor water-cooled heat exchanger (6) is connected to the sixth solenoid valve (21) and the seventh solenoid valve (22).
4. The air-cooled and water-cooled dual-purpose heat pump air-conditioning unit according to claim 3, characterized in that: The seventh solenoid valve (22) is connected to the eighth solenoid valve (27), the eighth solenoid valve (27) is connected to the first manual valve (28), the first manual valve (28) is connected to the second manual valve (29), and the sixth solenoid valve (21) is connected to the cooling water circulation pump (26).
5. The air-cooled and water-cooled dual-purpose heat pump air-conditioning unit according to claim 4, characterized in that: The cooling water circulation pump (26) is connected to the cooling water processor (25), the cooling water processor (25) is connected to the second manual valve (29), and the first manual valve (28) and the second manual valve (29) are both connected to the first cooling tower (23) and the second cooling tower (24).
6. The air-cooled and water-cooled dual-purpose heat pump air-conditioning unit according to claim 5, characterized in that: The number of the cooling towers is not limited.
7. An air-cooled and water-cooled dual-purpose heat pump air conditioning system, characterized in that: The invention comprises the air-cooled and water-cooled dual-purpose heat pump air-conditioning unit as described in any one of claims 1 to 6 above.