An air-to-air heat pump system

Abstract

The utility model provides a kind of air energy heat pump system, it satisfies the demand of all-weather operation of same set of heat pump equipment.It includes: compressor;Four-way valve, it includes C mouth, D mouth, E mouth, S mouth;Air side heat exchanger, it includes air side heat exchanger body, fan;Electronic expansion valve;Water side heat exchanger, it includes refrigerant heat exchange pipe section, water heat exchange shell section;And efficiency promotion module, it includes pump body, heat exchanger;The pipe section output end of the air side heat exchanger body is connected to the E mouth of the four-way valve by finned tube, the four-way valve S mouth is connected to the refrigerant inlet of the compressor, the refrigerant outlet of the compressor is connected the D mouth of the four-way valve, the C mouth of the four-way valve is connected to the inlet of the refrigerant heat exchange pipe section of the water side heat exchanger by pipeline, the outlet of the refrigerant heat exchange pipe section is connected after the electronic expansion valve again to the pipe section input end of the air side heat exchanger body.

Description

Technical Field

[0001] This utility model relates to the technical field of comprehensive utilization of solar energy, specifically an air source heat pump system. Background Technology

[0002] An air source heat pump is an energy-saving device that uses high-grade energy to transfer heat from a low-grade heat source, the air, to a high-grade heat source. It converts low-grade heat energy in the air that cannot be directly used into usable high-grade heat energy, thereby saving some high-grade energy (such as coal, natural gas, oil, and electricity). However, existing air source heat pumps can only provide heating when there is sufficient sunlight. Once sunlight is insufficient, there is no hot water available. The reason for this is that under low ambient temperature conditions, especially at -25°C, the energy efficiency of air source heat pumps for producing hot water is generally below 2.0, resulting in low heating efficiency, high energy consumption, and failure to achieve the goal of energy saving. Therefore, how to enable air source heat pumps to operate around the clock is an urgent technical problem to be solved. Utility Model Content

[0003] To address the aforementioned issues, this utility model provides an air source heat pump system that offers high-efficiency heating when there is sufficient sunlight and can still provide hot water when there is insufficient sunlight, thus meeting the needs of the same heat pump equipment operating around the clock.

[0004] An air source heat pump system, characterized in that it comprises: compressor; A four-way valve includes ports C, D, E, and S. An air-side heat exchanger, comprising an air-side heat exchanger body and a fan; Electronic expansion valve; A water-side heat exchanger, comprising a refrigerant heat exchange tube side and a water heat exchange shell side; And an efficiency improvement module, which includes a pump body and a heat exchanger; The tube-side output end of the air-side heat exchanger body is connected to port E of the four-way valve via finned tubes. Port S of the four-way valve is connected to the refrigerant inlet of the compressor. The refrigerant outlet of the compressor is connected to port D of the four-way valve. Port C of the four-way valve is connected to the inlet of the refrigerant heat exchange tube-side section of the water-side heat exchanger via a pipeline. The outlet of the refrigerant heat exchange tube-side section is connected to the electronic expansion valve and then to the tube-side input end of the air-side heat exchanger body. The pump body pumps external waste heat into the shell-side inlet of the heat exchanger through a low-temperature heat source. The low-temperature heat source flows out from the shell-side outlet after passing through the heat exchange chamber of the heat exchanger. The finned tube is provided with two sets of tees, specifically a first tee closer to the air-side heat exchanger body and a second tee farther away from the air-side heat exchanger body. Two ports of the first tee are fitted onto the finned tube to form a first bypass, and two ports of the second tee are fitted onto the finned tube to form a second bypass. The first bypass is connected to the tube-side inlet of the heat exchanger, and the second bypass is connected to the tube-side outlet of the heat exchanger.

[0005] Its further features are: In operation, the four-way valve's port E is connected to port S, and port C is connected to port D. The first three-way valve is a three-way valve. When there is sufficient light, the first bypass of the first three-way valve is closed. When there is insufficient light, the first three-way valve opens the first bypass, and the refrigerant enters the tube side of the heat exchanger to exchange heat with the low-temperature heat source, thereby raising or lowering the temperature of the refrigerant and sending the refrigerant into the compressor for compression and circulation. The low-temperature heat source is low-temperature hot water, the pump body is a water pump, the water pump pumps the low-temperature hot water into the shell-side inlet of the heat exchanger, and the low-temperature hot water flows out from the shell-side outlet after passing through the heat exchange chamber of the heat exchanger.

[0006] With this invention, the efficiency enhancement module, consisting of the pump body and heat exchanger, is equipped with a shell, making it an external module. The tube-side inlet of the heat exchanger in the external module is connected to the first bypass of the first tee, and the second bypass of the second tee is connected to the tube-side outlet of the heat exchanger. This gives the refrigerant another heat exchange mechanism, namely, a heat exchanger connected in series at the upper end of the compressor inlet, using waste heat to provide heat, increasing the heat exchange area of ​​the evaporator, and raising the refrigerant temperature at the compressor inlet, thus increasing the superheat of the system by 3°C. The system can achieve an overall efficiency improvement of about 10% in a low-temperature environment of -25°C. It provides high-efficiency heating when there is sufficient sunlight, and when there is insufficient sunlight, the efficiency enhancement module is turned on to provide an auxiliary heat source, allowing the refrigerant to be heated through the efficiency enhancement module, so that hot water can still be provided even without sunlight, meeting the needs of the same heat pump equipment to operate around the clock. Attached Figure Description

[0007] Figure 1 This is a simplified structural diagram of the present invention; The names corresponding to the serial numbers in the diagram are as follows: Compressor 10, four-way valve 20, air-side heat exchanger 30, air-side heat exchanger body 31, fan 32, electronic expansion valve 40, water-side heat exchanger 50, inlet 51, outlet 52, inlet pipe 53, outlet pipe 54, efficiency improvement module 60, pump body 61, heat exchanger 62, outer shell 63, finned tube 70, first tee 80, first bypass 81, second tee 90, second bypass 91, pipeline 100. Detailed Implementation

[0008] An air source heat pump system, see Figure 1 It includes a compressor 10, a four-way valve 20, an air-side heat exchanger 30, an electronic expansion valve 40, a water-side heat exchanger 50, and an efficiency improvement module 60. The four-way valve 20 includes port C, port D, port E, and port S; the air-side heat exchanger 30 includes an air-side heat exchanger body 31 and a fan 32; The water-side heat exchanger 50 includes a refrigerant heat exchange tube side section and a water heat exchange shell side section. The efficiency improvement module 60 includes a pump body 61 and a heat exchanger 62; The tube-side output end of the air-side heat exchanger body 31 is connected to the E port of the four-way valve 20 through the finned tube 70. The S port of the four-way valve 20 is connected to the refrigerant inlet of the compressor 10. The refrigerant outlet of the compressor 10 is connected to the D port of the four-way valve 20. The C port of the four-way valve 20 is connected to the inlet 51 of the refrigerant heat exchange tube-side section of the water-side heat exchanger 50 through the pipeline 100. The outlet 52 of the refrigerant heat exchange tube-side section is connected to the electronic expansion valve 40 and then connected to the tube-side input end of the air-side heat exchanger body 31. Pump body 61 pumps external waste heat into the shell-side inlet of heat exchanger 62 through a low-temperature heat source. The low-temperature heat source flows out from the shell-side outlet after passing through the heat exchange chamber of heat exchanger 62. Two sets of tees are provided on finned tube 70, specifically a first tee 80 closer to the air-side heat exchanger body 31 and a second tee 90 farther from the air-side heat exchanger body 31. Two ports of the first tee 80 are fitted onto the finned tube 70 to form a first bypass 81, and two ports of the second tee 90 are fitted onto the finned tube 70 to form a second bypass 91. The first bypass 81 is connected to the tube-side inlet of heat exchanger 61, and the second bypass 91 is connected to the tube-side outlet of heat exchanger 61.

[0009] In a specific embodiment, the E port of the four-way valve 20 in the working state is connected to the S port, and the C port is connected to the D port; The first three-way valve 80 is a three-way valve. When there is sufficient light, the first bypass 81 of the first three-way valve 80 is closed. When there is insufficient light, the first three-way valve 80 opens the first bypass 81, and the refrigerant enters the tube side of the heat exchanger 61 to exchange heat with the low-temperature heat source, thereby raising or lowering the temperature of the refrigerant and sending the refrigerant into the compressor 10 for compression cycle.

[0010] In practice, the low-temperature heat source is low-temperature hot water, the pump body 61 is a water pump, the water pump pumps the low-temperature hot water into the shell-side inlet of the heat exchanger 62, and the low-temperature hot water flows out from the shell-side outlet after passing through the heat exchange chamber of the heat exchanger 62.

[0011] In specific implementation, the efficiency improvement module composed of pump body 61 and heat exchanger 62 is provided with a shell 63, which makes the efficiency improvement module 60 form an external module. The tube-side inlet of the heat exchanger of the external module is connected to the first bypass 81 of the first tee 80, and the second bypass 91 of the second tee 90 is connected to the tube-side outlet of the heat exchanger 62.

[0012] In a specific embodiment, the shell side of the water layer heat exchanger 50 is also externally connected to an inlet pipe 53 and an outlet pipe 54.

[0013] Its working principle is as follows: it enables the refrigerant (Freon) to have another heat exchange mechanism, that is, a heat exchanger is connected in series at the upper end of the compressor inlet to provide heat, increase the heat exchange area of ​​the evaporator, and increase the Freon temperature at the compressor inlet, thereby increasing the superheat of the system. The superheat is increased by 3°C on the original basis. The system can improve the overall efficiency by about 10% in an environment with a low temperature of -25°C. It provides high-efficiency heating when there is sufficient sunlight. When there is insufficient sunlight, the efficiency improvement module is turned on to provide an auxiliary heat source, so that the refrigerant can be heated through the efficiency improvement module, so that hot water can still be provided when there is no sunlight, meeting the needs of the same heat pump equipment to operate around the clock.

[0014] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0015] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An air-source heat pump system, characterized in that, It includes: compressor; A four-way valve includes ports C, D, E, and S. An air-side heat exchanger, comprising an air-side heat exchanger body and a fan; Electronic expansion valve; A water-side heat exchanger, comprising a refrigerant heat exchange tube side and a water heat exchange shell side; And an efficiency improvement module, which includes a pump body and a heat exchanger; The tube-side output end of the air-side heat exchanger body is connected to port E of the four-way valve via finned tubes. Port S of the four-way valve is connected to the refrigerant inlet of the compressor. The refrigerant outlet of the compressor is connected to port D of the four-way valve. Port C of the four-way valve is connected to the inlet of the refrigerant heat exchange tube-side section of the water-side heat exchanger via a pipeline. The outlet of the refrigerant heat exchange tube-side section is connected to the electronic expansion valve and then to the tube-side input end of the air-side heat exchanger body. The pump body pumps external waste heat into the shell-side inlet of the heat exchanger through a low-temperature heat source. The low-temperature heat source flows out from the shell-side outlet after passing through the heat exchange chamber of the heat exchanger. The finned tube is provided with two sets of tees, specifically a first tee closer to the air-side heat exchanger body and a second tee farther away from the air-side heat exchanger body. Two ports of the first tee are fitted onto the finned tube to form a first bypass, and two ports of the second tee are fitted onto the finned tube to form a second bypass. The first bypass is connected to the tube-side inlet of the heat exchanger, and the second bypass is connected to the tube-side outlet of the heat exchanger.

2. The air source heat pump system according to claim 1, characterized in that: In operation, the four-way valve's E port is connected to the S port, and its C port is connected to the D port.

3. An air source heat pump system according to claim 2, characterized in that: The first three-way valve is a three-way valve. When there is sufficient light, the first bypass of the first three-way valve is closed. When there is insufficient light, the first three-way valve opens the first bypass, and the refrigerant enters the tube side of the heat exchanger to exchange heat with the low-temperature heat source, thereby raising or lowering the temperature of the refrigerant and sending the refrigerant into the compressor for compression and circulation.

4. An air source heat pump system according to claim 3, characterized in that: The low-temperature heat source is low-temperature hot water, the pump body is a water pump, the water pump pumps the low-temperature hot water into the shell-side inlet of the heat exchanger, and the low-temperature hot water flows out from the shell-side outlet after passing through the heat exchange chamber of the heat exchanger.

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