Air source heat pump hot water, heating, refrigeration and heat recovery system

Abstract

The utility model discloses a hot water, heating, refrigeration and heat recovery system of an air source heat pump, which belongs to the field of thermal devices and comprises an air source heat pump unit, a buffer water tank, a compressor, an expansion valve, a domestic water tank and a heat pump circulating pump. The buffer water tank comprises a heat exchange coil, a first tail end circulation opening and a second tail end circulation opening, the domestic water tank comprises a hot water coil, a cold water inlet and a hot water outlet, the heat pump circulation pump is arranged on a pipeline connecting the first tail end circulation opening and a heat pump inlet, one end of the heat exchange coil is communicated with an air inlet of the compressor, and an air outlet of the compressor is communicated with one end of the hot water coil. The other end of the hot water coil pipe is sequentially communicated with the expansion valve and the other end of the heat exchange coil pipe, a heat pump outlet and a second tail end circulation opening are connected with a tail end water supply pipeline and a tail end water return pipeline respectively, and refrigerating or heating terminal equipment is arranged between the tail end water supply pipeline and the tail end water return pipeline. According to the utility model, the refrigeration or heating efficiency of the terminal equipment can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal devices, and in particular relates to an air source heat pump hot water, heating, refrigeration and heat recovery system. Background Art

[0002] In the prior art, there is an air source heat pump multifunctional coupling system, which has a publication number of CN219656168U and a publication date of September 8, 2023. The system includes an air source heat pump unit, a heat pump assembly, a heat storage and exchange water tank and a domestic water tank. The air source heat pump unit is provided with a heat pump water inlet and a heat pump water outlet, and the heat pump water inlet and the heat pump water outlet are respectively connected to the heat storage and exchange water tank via pipes. A heat pump circulation pump is provided on the pipe connecting the heat pump water inlet or the heat pump water outlet to the heat storage and exchange water tank. The heat storage and exchange water tank is provided with a cold and warm water supply port and a cold and warm water return port. The water inlet and the cold and warm water return inlet are connected through a pipeline through a cold and warm circulation pump and an indoor refrigeration or heating terminal device; a heat exchange coil is arranged in the water storage and exchange water tank; a coil inlet is arranged at one end of the heat exchange coil, and a coil outlet is arranged at the other end; the heat pump assembly includes a compressor and an electronic expansion valve; the outlet of the compressor is connected to the heat exchanger inlet of the water tank heat exchanger arranged in the domestic water tank; the heat exchanger outlet of the water tank heat exchanger is connected to the coil inlet of the heat exchange coil through the electronic expansion valve; the coil outlet of the heat exchange coil is connected to the compressor inlet; a domestic hot water pipe and a water supply pipe are arranged on the domestic water tank.

[0003] Its shortcomings are: there are a large number of pipe interfaces on the hot water storage and exchange water tank, which leads to a greater risk of interface leakage; since the hot water storage and exchange water tank participates in the air source heat pump cycle and the refrigeration or heating terminal cycle, if the energy in the hot water storage and exchange water tank is not fully replaced, it will lead to poor refrigeration or heating effects at the refrigeration or heating terminal and low equipment utilization. Utility Model Content

[0004] The purpose of the utility model is to provide an air source heat pump hot water, heating, refrigeration and heat recovery system, which simplifies the connection structure between the air source heat pump unit and the buffer water tank, reduces the total length of the pipeline interface and the connecting water pipe, and improves the efficiency of refrigeration or heating.

[0005] The purpose of the utility model is achieved as follows: an air source heat pump hot water, heating, refrigeration and heat recovery system, including an air source heat pump unit, a buffer water tank, a heat pump component, a domestic water tank and a heat pump circulation pump, the air source heat pump unit includes a heat pump inlet and a heat pump outlet, the heat pump component includes a compressor and an expansion valve, the buffer water tank includes a heat exchange coil, a medium outlet one, a medium inlet one, a terminal circulation port one and a terminal circulation port two, the domestic water tank includes a hot water coil, a medium outlet two, a medium inlet two, a cold water inlet and a hot water outlet, the terminal circulation port one and the The input end of the heat pump circulation pump is connected, the output end of the heat pump circulation pump is connected to the heat pump inlet, one end of the heat exchange coil is connected to the compressor air inlet via medium outlet one, the compressor exhaust port is connected to one end of the hot water coil via medium inlet two, the other end of the hot water coil is connected to the input end of the expansion valve via medium outlet two, the output end of the expansion valve is connected to the other end of the heat exchange coil via medium inlet one, the heat pump outlet and the terminal circulation port two are respectively connected to the terminal water supply pipe and the terminal return pipe, and a refrigeration or heating terminal device is arranged between the terminal water supply pipe and the terminal return pipe.

[0006] When the utility model is used, the heat pump circulation pump and the air source heat pump unit are started. After the heat pump circulation pump extracts water from the buffer water tank for cooling or heating, the chilled water or hot water is supplied to the cooling or heating terminal equipment (existing technology) through the terminal water supply pipe, and finally circulates to the terminal return port 2, and then enters the buffer water tank. Compared with the existing technology, the beneficial effect of the utility model is that the water after cooling or heating by the air source heat pump unit is directly supplied to the heating terminal equipment, and then enters the buffer water tank for recycling, avoiding the loss of energy replacement in the water tank and ensuring the cooling or heating effect of the terminal; the system simplifies the system structure and reduces the investment cost by reducing the number of interfaces on the buffer water tank and the number of circulating pumps used, and has the advantages of centralized equipment layout and convenient repair and maintenance.

[0007] As a further improvement of the present utility model, the heat exchange coil includes coil one, coil inlet one and coil outlet one, the hot water coil includes coil two, coil inlet two and coil outlet two, the coil outlet one is connected to the compressor air inlet through a pipeline, the compressor exhaust port is connected to the coil inlet two through a pipeline, and the coil outlet two is connected to the expansion valve and the coil inlet one in sequence through a pipeline.

[0008] As a further improvement of the present invention, the second terminal circulation port is located above the first terminal circulation port, and the first terminal circulation port is located below the first coil.

[0009] As a further improvement of the present invention, the hot water outlet is located above the second coil, and the cold water inlet is located below the second coil.

[0010] As a further improvement of the present invention, the coil pipe 1 and the coil pipe 2 are both single spiral cylindrical structures.

[0011] As a further improvement of the utility model, an exhaust valve is provided on the top of the buffer water tank.

[0012] As a further improvement of the utility model, a hot water supply pipe is provided on the hot water outlet, and the end of the hot water supply pipe extends to the top of the domestic water tank. A cold water replenishment pipe is provided on the cold water inlet, and the end of the hot water supply pipe extends to the bottom of the domestic water tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Among them, 1. air source heat pump unit; 2. compressor; 3. expansion valve; 4. buffer water tank; 5. domestic water tank; 6. heat pump circulation pump; 101. heat pump inlet; 102. heat pump outlet; 401. heat exchange coil; 402. coil inlet one; 403. coil outlet one; 404. terminal circulation port one; 405. terminal circulation port two; 501. hot water coil; 502. coil inlet two; 503. coil outlet two; 504. cold water inlet; 505. hot water outlet. DETAILED DESCRIPTION

[0015] like Figure 1As shown, an air source heat pump hot water, heating, cooling and heat recovery system includes an air source heat pump unit 1, a buffer water tank 4, a heat pump component, a domestic water tank 5 and a heat pump circulation pump 6; the air source heat pump unit 1 includes a heat pump inlet 101 and a heat pump outlet 102; the heat pump component includes a compressor 2 and an expansion valve 3; the buffer water tank 4 includes an exhaust valve, a heat exchange coil 401, a medium outlet 1, a medium inlet 1, a terminal circulation port 1 404 and a terminal circulation port 2 405, and the heat exchange coil 401 includes a coil 1, Coil inlet 1 402 and coil outlet 1 403; domestic water tank 5 includes hot water coil 501, medium outlet 2, medium inlet 2, cold water inlet 504 and hot water outlet 505, hot water coil 501 includes coil 2, coil inlet 2 502 and coil outlet 2 503; terminal circulation port 1 404 is connected to the input end of heat pump circulation pump 6, and the output end of heat pump circulation pump 6 is connected to heat pump inlet 101; coil outlet 1 403 is connected to the air inlet of compressor 2 through medium outlet 1 and through a pipeline, and compressor 2 exhaust port 101 is connected to the air inlet of compressor 2 through medium outlet 1 and medium inlet 102. The gas port is connected to the coil inlet 2 502 through the medium inlet 2 through the pipeline, the coil outlet 2 503 is connected to the expansion valve 3 input end through the medium outlet 2 and the pipeline, and the expansion valve 3 output end is connected to the coil inlet 1 402 through the pipeline through the medium inlet 1; the heat pump outlet 102 and the terminal circulation port 2 405 are respectively connected to the terminal water supply pipeline and the terminal return water pipeline, and a refrigeration or heating terminal device (not shown in the figure) is arranged between the terminal water supply pipeline and the terminal return water pipeline; a hot water outlet 505 is provided with a hot water outlet 506. Water supply pipe, the end of the hot water supply pipe extends to the top of the domestic water tank 5, the cold water inlet 504 is provided with a cold water replenishment pipe, and the end of the hot water supply pipe extends to the bottom of the domestic water tank 5; to ensure the energy replacement effect of water and coolant, the terminal circulation port 2 405 is arranged above the terminal circulation port 1 404, the terminal circulation port 1 404 is arranged below the coil 1, the hot water outlet 505 is arranged above the coil 2, the cold water inlet 504 is arranged below the coil 2, and the coil 1 and the coil 2 are designed to be a single spiral cylindrical structure.

[0016] The working mode of this system is as follows:

[0017] 1. Cooling or heating mode

[0018] Start the heat pump circulation pump 6 and the air source heat pump unit 1. After the heat pump circulation pump 6 draws water from the buffer water tank 4 for cooling or heating, it circulates the chilled water or hot water to the terminal water supply, and finally circulates to the terminal circulation port 2 405, enters the buffer water tank 4 and participates in the circulation again.

[0019] 2. Hot water mode

[0020] The high-temperature and high-pressure refrigerant gas is discharged from the exhaust port of the compressor 2 and enters the hot water coil 501 to release heat and condense. The water temperature rises and the refrigerant becomes liquid. The liquid refrigerant is throttled by the expansion valve 3 and enters the heat exchange coil 401 of the buffer water tank 4 to absorb heat and evaporate. The evaporated gaseous refrigerant returns to the air inlet of the compressor 2, and the cycle is repeated until the domestic hot water temperature reaches the set temperature value; when the water in the buffer water tank 4 is cooled to the control temperature value, the heat pump circulation pump 6 and the air source heat pump unit 1 are started for heating. The heat pump circulation pump 6 draws water from the buffer water tank 4 and heats it. The water then flows through the heat pump outlet 102, the terminal water supply pipe and the terminal return pipe and circulates to the terminal circulation port 2 405, and then enters the buffer water tank 4, thereby ensuring the evaporation temperature of the refrigerant in the heat exchange coil 401, and then ensuring the hot water demand.

[0021] 3. Heating water heating mode

[0022] Start the heat pump circulation pump 6 and the air source heat pump unit 1. After the heat pump circulation pump 6 draws water from the buffer water tank 4 for heating, it circulates the hot water to the terminal water supply, and then circulates to the terminal circulation port 2 405, enters the buffer water tank 4, and the high-temperature and high-pressure refrigerant gas is discharged from the exhaust port of the compressor 2, enters the hot water coil 501 to release heat and condense. The water temperature rises, and the refrigerant becomes liquid. After throttling by the expansion valve 3, the liquid refrigerant enters the heat exchange coil 401 of the buffer water tank 4 to absorb heat and evaporate. The evaporated gaseous refrigerant returns to the air inlet of the compressor 2, and this cycle is repeated until the domestic hot water temperature reaches the set temperature value.

[0023] 4. Cooling and heating water mode

[0024] Start the heat pump circulation pump 6 and the air source heat pump unit 1. The heat pump circulation pump 6 draws water from the buffer water tank 4 for refrigeration, circulates the chilled water to the terminal water supply, and then circulates it to the terminal circulation port 2 405 to enter the buffer water tank 4. The high-temperature and high-pressure refrigerant gas is discharged from the exhaust port of the compressor 2 and enters the hot water coil 501 to release heat and condense. The water temperature rises and the refrigerant becomes liquid. The liquid refrigerant enters the heat exchange coil 401 of the buffer water tank 4 after throttling by the expansion valve 3 to absorb heat and evaporate. The evaporated gaseous refrigerant returns to the air inlet of the compressor 2, and the cycle is repeated to continuously recover the waste heat in the buffer water tank 4 to the domestic water tank 5 until the domestic hot water temperature reaches the set temperature value.

[0025] The advantages of the utility model are: the system can provide heating while cooling, and recycle indoor waste heat; the system can produce hot water while heating through a heat pump component, separate the circulating water in the pipeline from domestic hot water, and ensure the quality and safety of domestic hot water; the system has a high equipment utilization rate, reducing operating costs and carbon emissions.

[0026] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. An air source heat pump hot water, heating, cooling and heat recovery system, comprising an air source heat pump unit, a buffer water tank, a heat pump component, a domestic water tank and a heat pump circulation pump, wherein the air source heat pump unit comprises a heat pump inlet and a heat pump outlet, and the heat pump component comprises a compressor and an expansion valve, characterized in that: The buffer water tank includes a heat exchange coil, a medium outlet 1, a medium inlet 1, a terminal circulation port 1 and a terminal circulation port 2; the domestic water tank includes a hot water coil, a medium outlet 2, a medium inlet 2, a cold water inlet and a hot water outlet; the terminal circulation port 1 is connected to the input end of the heat pump circulation pump, the output end of the heat pump circulation pump is connected to the heat pump inlet; one end of the heat exchange coil is connected to the compressor air inlet via the medium outlet 1, the compressor exhaust port is connected to one end of the hot water coil via the medium inlet 2, the other end of the hot water coil is connected to the input end of the expansion valve via the medium outlet 2, the output end of the expansion valve is connected to the other end of the heat exchange coil via the medium inlet 1; the heat pump outlet and the terminal circulation port 2 are respectively connected to the terminal water supply pipe and the terminal return pipe; a refrigeration or heating terminal device is arranged between the terminal water supply pipe and the terminal return pipe.

2. An air source heat pump hot water, heating, cooling and heat recovery system according to claim 1, It is characterized in that The heat exchange coil includes coil 1, coil inlet 1 and coil outlet 1, the hot water coil includes coil 2, coil inlet 2 and coil outlet 2, the coil outlet 1 is connected to the compressor air inlet through a pipeline, the compressor exhaust port is connected to the coil inlet 2 through a pipeline, and the coil outlet 2 is connected to the expansion valve and the coil inlet 1 in sequence through a pipeline.

3. An air source heat pump hot water, heating, cooling and heat recovery system according to claim 2, It is characterized in that The second terminal circulation port is located above the first terminal circulation port, and the first terminal circulation port is located below the first coil.

4. An air source heat pump hot water, heating, cooling and heat recovery system according to claim 2, It is characterized in that The hot water outlet is located above the second coil, and the cold water inlet is located below the second coil.

5. An air source heat pump hot water, heating, cooling and heat recovery system according to claim 2, It is characterized in that The coil pipe 1 and the coil pipe 2 are both single spiral cylindrical structures.

6. An air source heat pump hot water, heating, cooling and heat recovery system according to claim 2, It is characterized in that An exhaust valve is arranged on the top of the buffer water tank.

7. An air source heat pump hot water, heating, cooling and heat recovery system according to any one of claims 1 to 6, characterized in that: The hot water outlet is provided with a hot water supply pipe, and the end of the hot water supply pipe extends to the top of the domestic water tank. The cold water inlet is provided with a cold water replenishment pipe, and the end of the hot water supply pipe extends to the bottom of the domestic water tank.

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