Double-source heat pump unit with water evaporation condensation and air evaporation all-in-one machine

Abstract

The utility model relates to the technical field of heat pump units, and discloses a double-source heat pump unit with a water evaporation condensation and air evaporation all-in-one machine, which comprises an air source heat pump circulating system, a two-stage heat pump circulating pipeline, a heat pump unit and a water source heat pump circulating system, the air source heat pump circulating system comprises an outdoor evaporator, a first-stage compressor, an intermediate heat exchanger and a first-stage expansion valve, and the water source heat pump circulating system comprises an intermediate heat exchanger, a second-stage compressor, a four-way reversing valve, a user heat exchanger, a water evaporation condenser and a two-way expansion valve. In winter, high-temperature water can be prepared in a low-temperature environment to implement centralized heating of a building, the attenuation amplitude of heating capacity is small, the requirement of simultaneous use of various user terminals such as a radiator and terrestrial heat can be met, low-temperature cold water can be prepared to implement centralized cooling of the building in summer, and a cooling system adopts water to perform evaporative cooling, so that the refrigerating efficiency is high; domestic hot water can be prepared through the water source heat pump circulating system in spring and autumn, and the machine is multipurpose.

Description

Technical Field

[0001] This utility model relates to the field of heat pump unit technology, specifically a dual-source heat pump unit with integrated water evaporation and condensation and air evaporation. Background Technology

[0002] Under the dual carbon background, air source heat pumps have become one of the main ways to implement energy conservation and carbon reduction. Air source heat pumps are divided into ordinary air source heat pumps and ultra-low temperature air source heat pumps. However, ordinary air source heat pumps have the disadvantages of low heating temperature, high noise and poor economy. Ordinary air source heat pumps in the market also have the problems of low heating temperature, serious heat loss in low temperature environment and low heating efficiency, which are not suitable for northern regions. Ultra-low temperature air source heat pumps generally use paint to increase enthalpy. Due to the influence of structural type, they are only suitable for heating buildings in winter and cannot meet the needs of public buildings that have both heating and cooling requirements.

[0003] At present, ground source heat pumps are widely used in public buildings in northern regions. Ground source heat pumps have higher energy efficiency than air source heat pumps, but they also have disadvantages such as large well-drilling area, high implementation difficulty, high cost and long investment recovery period.

[0004] This invention overcomes the shortcomings of ordinary air source heat pumps, such as low heating temperature, high noise, and poor economy; ultra-low temperature air source heat pumps, which cannot be used for building cooling; and ground source heat pumps, which have large footprint and high investment. The dual-source heat pump unit has the characteristics of simple system, small footprint, and low investment. Compared with other forms of renewable energy utilization, it has the outstanding advantages of dual functions of summer cooling and winter heating, high unit energy efficiency, small footprint, and good economy. Summary of the Invention

[0005] The practical problems of heat pumps.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a dual-source heat pump unit with integrated water evaporation and condensation and air evaporation, comprising an air source heat pump circulation system, two-stage heat pump circulation pipelines, a heat pump unit, and a water source heat pump circulation system. The two-stage heat pump circulation pipelines adopt a cascaded structure and are connected through an intermediate heat exchanger. The air source heat pump circulation system comprises an outdoor evaporator, a primary compressor, an intermediate heat exchanger, and a primary expansion valve. The water source heat pump circulation system comprises an intermediate heat exchanger, a secondary compressor, a four-way reversing valve, a user heat exchanger, a water distributor, and a two-way expansion valve.

[0007] According to the above technical solution, the heat pump unit includes an outdoor heat exchanger and a compressor module. The outdoor heat exchanger consists of an outdoor evaporator, a cooling water pump, a water distributor, a water collection pan, a water evaporation condenser, and a fan. The compressor module consists of a primary compressor, a primary expansion valve, an intermediate heat exchanger, a secondary compressor, a four-way reversing valve, a user heat exchanger, and a two-way expansion valve.

[0008] According to the above technical solution, the outdoor heat exchanger adopts an integrated structure, which integrates the outdoor evaporator with the cooling water pump, water distributor, water collection tray and water evaporation condenser into one unit. The outdoor evaporator is arranged on the outer perimeter, and the water evaporation condenser is arranged in the inner middle. The top is equipped with a fan and water distributor, and the bottom is equipped with a water collection tray, cooling water pump and packing.

[0009] According to the above technical solution, the compressor unit module adopts an integrated design, which is compact and easy to arrange. The output and input ends of the outdoor heat exchanger are respectively equipped with shut-off valve one and shut-off valve two, which are connected to the compressor unit module.

[0010] According to the above technical solution, the heat pump unit uses the water evaporation condenser of the outdoor heat exchanger to cool the building through water evaporation during summer operation, and uses the outdoor evaporator of the outdoor heat exchanger to absorb waste heat from the air for building heating during winter operation.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] With the cascade structure of air source heat pump and water source heat pump, high temperature water can be produced in low temperature environment in winter to implement centralized heating of buildings with small heat output attenuation. It can meet the needs of various user terminals such as radiators and geothermal heating at the same time. In summer, low temperature cold water can be produced to implement centralized cooling of buildings. The cooling system uses water for evaporative cooling, which has high cooling efficiency. In spring and autumn, domestic hot water can be produced through water source heat pump circulation system, making it a multi-purpose machine.

[0013] Dual-source heat pump units adopt a split structure, with only an outdoor heat exchange unit installed outdoors. Without a loud compressor, the unit can operate with low noise, overcoming the disadvantage of loud operation of ordinary air source heat pumps, thereby expanding the market application of air source heat pumps.

[0014] The modular layout allows for highly integrated indoor components that can be placed in the building's basement, equipment mezzanine, or rooftop, reducing the building area of ​​the machine room and the outdoor land area required. This results in a project that is both economical and suitable for various applications.

[0015] Furthermore, the dual-source heat pump unit adopts an integrated structure, in which the outdoor heat exchange unit and the compressor unit module are arranged as a whole. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the dual-source heat pump unit system of the present invention, which integrates water evaporation and condensation with air evaporation.

[0017] Figure 2 This is a schematic diagram of the outdoor integrated heat exchanger unit with a separate arrangement of the dual-source heat pump unit of this utility model;

[0018] Figure 3 This is a schematic diagram of the compressor unit module with a separate arrangement in the dual-source heat pump unit of this utility model;

[0019] Figure 4 This is an overall layout diagram of the dual-source heat pump unit of this utility model.

[0020] In the diagram: 1. Outdoor evaporator; 2. Primary compressor; 3. Intermediate heat exchanger; 4. Primary expansion valve; 5. Secondary compressor; 6. Four-way reversing valve; 7. User heat exchanger; 8. Two-way expansion valve; 9. Cooling water pump; 10. Water distributor; 11. Water collection tray; 12. Water evaporation condenser; 13. Fan; 14. Shut-off valve one; 15. Shut-off valve two; 16. Shut-off valve three; 17. Shut-off valve four; 18. Packing; 19. Outdoor heat exchanger unit; 20. Compressor unit module. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0022] Please refer to Figures 1-4.

[0023] A dual-source heat pump unit with integrated water evaporation and condensation and air evaporation includes an air source heat pump circulation system, two-stage heat pump circulation pipelines, a heat pump unit, and a water source heat pump circulation system. The two-stage heat pump circulation pipelines adopt a cascaded structure and are connected by an intermediate heat exchanger 3. The air source heat pump circulation system consists of an outdoor evaporator 1, a primary compressor 2, an intermediate heat exchanger 3, and a primary expansion valve 4. The water source heat pump circulation system consists of an intermediate heat exchanger 3, a secondary compressor 5, a four-way reversing valve 6, a user heat exchanger 7, a water evaporation condenser 12, and a two-way expansion valve 8.

[0024] The heat pump unit adopts a split structure, including an outdoor heat exchanger 19 and a compressor module 20. The outdoor heat exchanger 19 consists of an outdoor evaporator 1, a cooling water pump 9, a water distributor 10, a water collection tray 11, a water evaporation condenser 12, and a fan 13. The compressor module 20 consists of a primary compressor 2, a primary expansion valve 4, an intermediate heat exchanger 3, a secondary compressor 5, a four-way reversing valve 6, a user heat exchanger 7, and a two-way expansion valve 8.

[0025] The outdoor heat exchanger 19 integrates the outdoor evaporator 1 with the cooling water pump 9, water distributor 10, water collection tray 11, packing 18, and water evaporation condenser 12 into one unit.

[0026] The compressor unit module 20 adopts an integrated design, has a compact structure, and is easy to arrange. The output and input ends of the outdoor heat exchanger 19 are respectively equipped with shut-off valve 14 and shut-off valve 25.

[0027] During summer operation, the heat pump unit uses the water evaporation condenser 12 in the outdoor heat exchanger 19 to cool the building through water evaporation. During winter operation, the outdoor evaporator 1 in the outdoor heat exchanger 19 absorbs waste heat from the air to heat the building.

[0028] Specifically, a dual-source heat pump unit with integrated water evaporation and condensation and air evaporation includes a two-stage heat pump circulation pipeline, which can provide heating in winter and cooling in summer;

[0029] During winter heating, the cooling water pump 9 and shut-off valves 14 and 15 are turned off. At the same time, the air source heat pump circulation system and the water source heat pump circulation system are run. When the air source heat pump circulation system is started, the air is first drawn by the fan 13 and flows through the outdoor evaporator 1 to release latent heat. The refrigerant gas in the outdoor evaporator 1 absorbs heat from the outdoor air through the heat exchange coil and enters the first-stage compressor 2. After compression, it enters the intermediate heat exchanger 3 to release heat to the water source heat pump circulation pipeline. After the intermediate heat exchanger 3 releases heat and cools down the refrigerant, it enters the first-stage expansion valve 4 for adiabatic expansion and then enters the outdoor evaporator 1 to absorb heat from the outdoor air. This cycle continues.

[0030] In the water source heat pump circulation system, the refrigerant absorbs the heat released by the air source heat pump circulation system through the intermediate heat exchanger 3 and enters the secondary compressor 5 after being drawn in and compressed. Then it enters the four-way reversing valve 6 and then enters the user heat exchanger 7 to release heat to the building user. The refrigerant coming out of the user heat exchanger 7 enters the two-way expansion valve 8 for adiabatic expansion and then enters the intermediate heat exchanger 3 to absorb the heat released by the air source heat pump circulation system, thus completing the heating cycle.

[0031] During normal cooling operation in summer, the first-stage compressor 2 is shut down, and only the water source heat pump circulation system is running. At the same time, shut-off valves 16 and 17 are closed, and shut-off valves 14, 15, and cooling water pump 9 are opened. The refrigerant gas in the water source heat pump circulation system pipeline is drawn in and compressed by the second-stage compressor 5, then enters the four-way reversing valve 6, and then enters the water evaporator 12 of the outdoor heat exchanger 19 through the pipeline to release heat to the water evenly sprayed by the water distributor 10, thereby achieving cooling. The refrigerant coming out of the water evaporator 12 then enters the two-way expansion valve 8 for adiabatic expansion, and then enters the user heat exchanger 7 to absorb the building's cooling load and raise its temperature. After passing through the four-way reversing valve 6, it enters the second-stage compressor 5. The refrigerant circulates in this way to achieve cooling of the building.

[0032] The water sprayed from the water distributor 10 absorbs heat and heats up after passing through the water evaporator condenser 12. After part of the water evaporates and the part of the water heats up, it falls under gravity. During the fall, it exchanges heat with the cold air drawn in by the fan 13, achieving cooling. The water then flows to the water collection tray 11 at the bottom of the outdoor heat exchanger 19, and is then pressurized by the cooling water pump 9 and sent to the water distributor 10 at the top of the outdoor heat exchanger 19, thus completing the cooling water circulation.

[0033] The outdoor heat exchanger 19 adopts an integrated structure, which integrates the outdoor evaporator 1 with the cooling water pump 9, water distributor 10, water collection tray 11 and water evaporation condenser 12 into one unit. The outdoor evaporator 1 is arranged on the outer perimeter, and the water evaporation condenser 12 is arranged in the inner middle. The top is equipped with a fan 13 and water distributor 10, and the bottom is equipped with a water collection tray 11 and cooling water pump 9.

[0034] Working principle: The air source heat pump and water source heat pump are combined into a cascade structure. In winter, it can produce high-temperature water in low-temperature environments to provide centralized heating for buildings with a small decrease in heating capacity. It can meet the needs of various user terminals such as radiators and geothermal heating at the same time. In summer, it can produce low-temperature cold water to provide centralized cooling for buildings. The cooling system uses water for evaporative cooling, which has high cooling efficiency.

[0035] Dual-source heat pump units adopt a split structure, with only an integrated heat exchanger installed outdoors. There is no compressor with high noise, which can ensure the low-noise operation of the unit and overcome the disadvantage of high operating noise of ordinary air source heat pumps, thereby expanding the market application of air source heat pumps.

[0036] The indoor components are highly integrated and can be placed in the building's basement, equipment mezzanine, and roof, reducing the building area of ​​the machine room and the outdoor land area. The project has good economic efficiency and applicability. Compared with related technologies, the dual-source heat pump unit with integrated water evaporation and condensation and air evaporation provided by this utility model has the following beneficial effects: it solves the shortcomings of ordinary air source heat pumps, such as low heating temperature, high noise, and poor economy; ultra-low temperature air source heat pumps, such as inability to provide building cooling; and ground source heat pumps, such as large footprint and high investment.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-source heat pump unit integrating water evaporation and condensation with air evaporation, characterized in that: It includes an air source heat pump circulation system, a two-stage heat pump circulation pipeline, a heat pump unit and a water source heat pump circulation system. The two-stage heat pump circulation pipeline adopts a cascade structure and is connected by an intermediate heat exchanger (3). The air source heat pump circulation system consists of an outdoor evaporator (1), a first-stage compressor (2), an intermediate heat exchanger (3) and a first-stage expansion valve (4). The water source heat pump circulation system consists of an intermediate heat exchanger (3), a second-stage compressor (5), a four-way reversing valve (6), a user heat exchanger (7), a water distributor (10) and a two-way expansion valve (8).

2. The dual-source heat pump unit with integrated water evaporation and condensation and air evaporation as described in claim 1, characterized in that: The heat pump unit includes an outdoor heat exchange unit (19) and a compressor module (20). The outdoor heat exchange unit (19) consists of an outdoor evaporator (1), a cooling water pump (9), a water distributor (10), a water collection tray (11), a water evaporation condenser (12), and a fan (13). The compressor module (20) consists of a primary compressor (2), a primary expansion valve (4), an intermediate heat exchanger (3), a secondary compressor (5), a four-way reversing valve (6), a user heat exchanger (7), and a two-way expansion valve (8).

3. A dual-source heat pump unit with integrated water evaporation and condensation and air evaporation as described in claim 2, characterized in that: The outdoor heat exchange unit (19) adopts an integrated structure, which integrates the outdoor evaporator (1), cooling water pump (9), water distributor (10), water collection tray (11), and water evaporation condenser (12) into one unit. The outdoor evaporator (1) is arranged around the outside, and the water evaporation condenser (12) is arranged in the middle inside. The top is equipped with a fan (13) and water distributor (10), and the bottom is equipped with a water collection tray (11), cooling water pump (9), and packing (18).

4. A dual-source heat pump unit with integrated water evaporation and condensation and air evaporation as described in claim 3, characterized in that: The compressor unit module (20) is integrated, compact in structure and easy to arrange. The output and input ends of the outdoor heat exchanger (19) are respectively equipped with shut-off valve one (14) and shut-off valve two (15) connected to the compressor unit module (20).

5. A dual-source heat pump unit with integrated water evaporation and condensation and air evaporation as described in claim 4, characterized in that: The heat pump unit uses the water evaporation condenser (12) of the outdoor heat exchanger (19) to cool the building through water evaporation during summer operation, and uses the outdoor evaporator (1) of the outdoor heat exchanger (19) to absorb the waste heat of the air for building heating during winter operation.

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