A swimming pool heat pump with non-cooling defrosting function

Abstract

This utility model relates to the field of swimming pool heat pump technology, specifically a swimming pool heat pump with a defrosting function that does not require cooling. It includes a heating mode and a defrosting mode, comprising a compressor, a reversing valve, an evaporator, and a first heat exchanger. The first heat exchanger is used to heat the swimming pool. When the pool heat pump is in heating mode, the refrigerant output from the compressor flows to the first heat exchanger, and the refrigerant output from the first heat exchanger flows to the evaporator. It also includes a second heat exchanger, which is not in contact with the swimming pool. When the pool heat pump is in defrosting mode, the refrigerant output from the evaporator flows to the second heat exchanger, and the refrigerant output from the second heat exchanger flows back to the compressor. By adding a second heat exchanger, this utility model ensures that in defrosting mode, the refrigerant output from the evaporator does not flow back to the first heat exchanger, but instead flows back to the second heat exchanger, which is not in contact with the swimming pool. This avoids using the heat of the swimming pool for defrosting, thus preventing the pool temperature from dropping and achieving defrosting without cooling.

Description

Technical Field

[0001] This utility model relates to the field of swimming pool heat pump technology, and in particular to a swimming pool heat pump with a defrosting function without cooling. Background Technology

[0002] Existing air source heat pump pool machines have a refrigeration system. When in heating mode, condensation will be generated on the main unit. Some of this condensation will remain on the aluminum fins of the finned heat exchanger. When the ambient temperature is below 0°C and the humidity is above 70%, frost will easily form. As the machine continues to run, the frost will accumulate more and more, which will affect the heat exchange efficiency of the finned heat exchanger.

[0003] Currently, the most widely used method for pool heat pumps is to reverse the refrigerant's path using a four-way valve. This changes the refrigerant's flow path, allowing the high-temperature, high-pressure gaseous refrigerant discharged from the compressor to instead flow into the finned heat exchanger, thus melting the frost layer on the finned heat exchanger and achieving defrosting.

[0004] However, reverse defrosting via a four-way valve has at least four disadvantages: 1. The pool unit will lower the water temperature on the user side (i.e., the pool water temperature) when reversing for defrosting; 2. The four-way valve generates instantaneous vibration when reversing, which has a certain impact on the copper piping, and frequent defrosting can easily cause the copper piping to break; 3. Frequent defrosting greatly reduces the energy efficiency of the pool heat pump; 4. Because it affects the water temperature on the user side, the reversing defrosting time of the four-way valve cannot be too long, so sometimes the frost layer on the surface of the finned heat exchanger must be stopped before it is completely melted.

[0005] Therefore, there is an urgent need for a swimming pool heat pump with a defrosting function that does not require cooling. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a swimming pool heat pump with a non-cooling defrosting function.

[0007] The technical solution adopted by this utility model to solve the problem is: a swimming pool heat pump with a non-cooling defrosting function, which has a heating mode and a defrosting mode, including a compressor, a reversing valve, an evaporator, and a first heat exchanger; the first heat exchanger is used to heat the swimming pool, and when the swimming pool heat pump is adjusted to the heating mode, the refrigerant output by the compressor flows to the first heat exchanger, and the refrigerant output by the first heat exchanger flows to the evaporator; it also includes a second heat exchanger, which is not in contact with the swimming pool, and when the swimming pool heat pump is adjusted to the defrosting mode, the refrigerant output by the evaporator flows to the second heat exchanger, and the refrigerant output by the second heat exchanger flows back to the compressor.

[0008] As a further improvement to the above technical solution, a fan is provided on the surface of the second heat exchanger, and the second heat exchanger exchanges heat with the air.

[0009] As a further improvement to the above technical solution, the second heat exchanger is a small finned heat exchanger.

[0010] As a further improvement to the above technical solution, the reversing valve is a four-way reversing valve, which has a first interface, a second interface, a third interface and a fourth interface.

[0011] As a further improvement to the above technical solution, it also includes a first branch pipe and a second branch pipe, with the first heat exchanger and the second heat exchanger respectively installed on the first branch pipe and the second branch pipe; the output end of the compressor is connected to the first interface through a first pipeline, one end of the first branch pipe and the second branch pipe is connected to the second interface through a second pipeline, and the other end of the first branch pipe and the second branch pipe is connected to the evaporator through a third pipeline; the evaporator is connected to the fourth interface through a fourth pipeline; the third interface is connected to the input end of the compressor through a fifth pipeline, and a gas-liquid separator is installed on the fifth pipeline.

[0012] As a further improvement to the above technical solution, a first solenoid valve is installed on the first branch pipe, a second solenoid valve is installed on the second branch pipe, and a one-way valve is provided on both the first branch pipe and the second branch pipe.

[0013] As a further improvement to the above technical solution, an electronic expansion valve is installed on the third pipeline.

[0014] As a further improvement to the above technical solution, it also includes a main circuit board, wherein the reversing valve and the second heat exchanger are both electrically connected to the main circuit board.

[0015] The beneficial effects of this utility model are: by adding a second heat exchanger, the refrigerant output from the evaporator does not flow back to the first heat exchanger in defrosting mode, but flows back to the second heat exchanger that is not in contact with the pool, thus avoiding the need to use the heat of the pool for defrosting, and the temperature of the pool will not drop, achieving defrosting without cooling. Attached Figure Description

[0016] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the flow path in the defrosting mode of this utility model;

[0018] Figure 2 This is a schematic diagram of the flow path under the heating mode of this utility model;

[0019] Figure 3This is a schematic diagram of the assembly structure of the second heat exchanger and the fan of this utility model;

[0020] In the diagram: 1-Compressor, 2-Reversing valve, 21-First interface, 22-Second interface, 23-Third interface, 24-Fourth interface, 3-First solenoid valve, 4-First heat exchanger, 5-Check valve, 6-Electronic expansion valve, 7-Evaporator, 8-Gas-liquid separator, 9-Second heat exchanger, 10-Fan, 11-Second solenoid valve, 12-Main circuit board, 131-First pipeline, 132-Second pipeline, 1321-First branch pipeline, 1322-Second branch pipeline, 133-Third pipeline, 134-Fourth pipeline, 135-Fifth pipeline. Detailed Implementation

[0021] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] Reference Figures 1 to 3 A swimming pool heat pump with non-cooling defrosting function is provided, which has a heating mode and a defrosting mode. It includes a compressor 1, a reversing valve 2, an evaporator 7, and a first heat exchanger 4. The first heat exchanger 4 is used to heat the swimming pool. When the swimming pool heat pump is adjusted to the heating mode, the refrigerant output by the compressor 1 flows to the first heat exchanger 4, and the refrigerant output by the first heat exchanger 4 flows to the evaporator 7. It also includes a second heat exchanger 9, which is not in contact with the swimming pool. When the swimming pool heat pump is adjusted to the defrosting mode, the refrigerant output by the evaporator 7 flows to the second heat exchanger 9, and the refrigerant output by the second heat exchanger 9 flows back to the compressor 1. In defrost mode, the refrigerant output from evaporator 7 does not flow back to the first heat exchanger 4, but instead flows back to the second heat exchanger 9, which is not in contact with the pool. This avoids using the pool's heat for defrosting, prevents the pool temperature from dropping during constant-temperature heating, increases the pool's heating speed and time, and greatly improves the heat pump unit's energy efficiency ratio at low temperatures. It achieves a defrosting process without lowering the water temperature or losing heat energy on the user side, thus improving energy efficiency.

[0024] like Figure 1As shown, the defrosting mode works as follows: The second solenoid valve 11 is open, the first solenoid valve 3 is closed, and the compressor 1 is powered on. The compressor 1 compresses the gaseous refrigerant in the refrigeration system into a high-temperature, high-pressure gaseous refrigerant (generally reaching 85°C). It enters through the first port 21 of the reversing valve 2. The reversing valve 2 is powered on and reverses the flow, exiting through the fourth port 24 and entering the evaporator 7 on the outer surface of the pool heat pump. It melts the frost layer on the surface of the evaporator 7. After the gaseous refrigerant uses its heat for defrosting, it becomes a liquid refrigerant. Then, it is throttled and depressurized through the electronic expansion valve 6 (throttle valve) and enters the second heat exchanger 9. The square fan 10 on the second heat exchanger 9 is running. The throttled liquid refrigerant evaporates in the second heat exchanger 9 (absorbing heat from the surrounding air). In the second heat exchanger 9, the liquid refrigerant becomes a gas. Finally, it passes through the one-way valve 5, the second port 22, the third port 23, and the gas-liquid separator 8 in sequence and returns to the return pipe of the compressor 1, thus forming a complete defrosting process.

[0025] like Figure 2 As shown, the working principle of the heating mode is as follows: After defrosting for 3-5 minutes, the frost layer on the surface of the evaporator 7 on the outer surface of the pool heat pump melts. The second solenoid valve 11 closes, the first solenoid valve 3 opens, the reversing valve 2 is de-energized and reversed. The refrigerant that enters through the first port 21 of the reversing valve 2 on the exhaust pipe of the compressor 1 will instead exit through the second port 22 of the reversing valve 2 and enter the first heat exchanger 4 (titanium tube heat exchanger) of the pool heat pump. The refrigerant output from the first heat exchanger 4 passes through the one-way valve 5, the electronic expansion valve 6, the evaporator 7, the fourth port 24, the third port 23, and the gas-liquid separator 8 in sequence and returns to the return pipe of the compressor 1. This forms a complete heating process and a constant temperature heating process for the pool water.

[0026] In a preferred embodiment, a fan 10 is provided on the surface of the second heat exchanger 9. The second heat exchanger 9 is a small finned heat exchanger. The second heat exchanger 9 absorbs heat from the air, and the fan 10 enhances the heat exchange effect. Specifically, the heat exchange area of ​​the small finned heat exchanger needs to be tested and verified based on the heat required for defrosting to determine its specific heat exchange area. It is necessary to ensure that there is sufficient heat exchange area to absorb heat from the air for defrosting at each ambient temperature. This generally requires testing the defrosting heat required under the most extreme conditions at the lowest operating ambient temperature of the unit to determine the heat exchange area of ​​the small finned heat exchanger.

[0027] In some embodiments, the reversing valve 2 is a four-way reversing valve 2, which has a first port 21, a second port 22, a third port 23, and a fourth port 24. In normal heating mode, the coil of the four-way reversing valve 2 is not energized; in defrost mode, the coil is energized to switch the flow path. The fan 10 is mounted on top of the second heat exchanger 9. When the electronic control enters defrost mode, the four-way reversing valve 2 is energized and reverses the flow path of the refrigerant, while the fan 10 is energized and starts. The system also includes a first branch pipe 1321 and a second branch pipe 1322, with the first heat exchanger 4 and the second heat exchanger 9 respectively mounted on the first branch pipe 1321 and the second branch pipe 1322. The output end of the compressor 1 is connected to the first port 21 via a first pipe 131, and one end of the first branch pipe 1321 and the second branch pipe 1322 is connected to the first port 21 via a first pipe 131. The second pipe 132 is connected to the second interface 22. The other end of the first branch pipe 1321 and the second branch pipe 1322 is connected to the evaporator 7 through the third pipe 133. The evaporator 7 is connected to the fourth interface 24 through the fourth pipe 134. The third interface 23 is connected to the input end of the compressor 1 through the fifth pipe 135. A gas-liquid separator 8 is installed on the fifth pipe 135. A first solenoid valve 3 (two-way solenoid valve) is installed on the first branch pipe 1321. A second solenoid valve 11 (two-way solenoid valve) is installed on the second branch pipe 1322. A one-way valve 5 is provided on both the first branch pipe 1321 and the second branch pipe 1322. An electronic expansion valve 6 is installed on the third pipe 133. The system also includes a main circuit board 12. The reversing valve 2 and the second heat exchanger 9 are both electrically connected to the main circuit board 12.

[0028] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A pool heat pump with non-cooling defrosting function, having a heating mode and a defrosting mode, including a compressor (1), a reversing valve (2), an evaporator (7) and a first heat exchanger (4); The first heat exchanger (4) is used to heat the pool. When the pool heat pump is adjusted to the heating mode, the refrigerant output by the compressor (1) flows to the first heat exchanger (4), and the refrigerant output by the first heat exchanger (4) flows to the evaporator (7). Its features are: It also includes a second heat exchanger (9), which is not in contact with the pool. When the pool heat pump is adjusted to the defrost mode, the refrigerant output by the evaporator (7) flows to the second heat exchanger (9), and the refrigerant output by the second heat exchanger (9) flows back to the compressor (1).

2. A swimming pool heat pump with non-cooling defrosting function as described in claim 1, characterized in that: A fan (10) is provided on the surface of the second heat exchanger (9), and the second heat exchanger (9) exchanges heat with the air.

3. A swimming pool heat pump with non-cooling defrosting function as described in claim 2, characterized in that: The second heat exchanger (9) is a small finned heat exchanger.

4. A swimming pool heat pump with non-cooling defrosting function as described in claim 1, characterized in that: The reversing valve (2) is a four-way reversing valve (2), which has a first port (21), a second port (22), a third port (23) and a fourth port (24).

5. A swimming pool heat pump with non-cooling defrosting function as described in claim 4, characterized in that: It also includes a first branch pipe (1321) and a second branch pipe (1322), and the first heat exchanger (4) and the second heat exchanger (9) are respectively installed on the first branch pipe (1321) and the second branch pipe (1322); The output end of the compressor (1) is connected to the first interface (21) through the first pipe (131), one end of the first branch pipe (1321) and the second branch pipe (1322) are connected to the second interface (22) through the second pipe (132), and the other end of the first branch pipe (1321) and the second branch pipe (1322) are connected to the evaporator (7) through the third pipe (133); The evaporator (7) is connected to the fourth interface (24) via the fourth pipe (134); The third interface (23) is connected to the input end of the compressor (1) through the fifth pipeline (135), and a gas-liquid separator (8) is installed on the fifth pipeline (135).

6. A swimming pool heat pump with non-cooling defrosting function as described in claim 5, characterized in that: A first solenoid valve (3) is installed on the first branch pipe (1321), a second solenoid valve (11) is installed on the second branch pipe (1322), and a one-way valve (5) is provided on both the first branch pipe (1321) and the second branch pipe (1322).

7. A swimming pool heat pump with non-cooling defrosting function as described in claim 5, characterized in that: An electronic expansion valve (6) is installed on the third pipeline (133).

8. The swimming pool heat pump with no temperature drop defrosting function according to claim 1, characterized in that: Further comprising a main circuit board (12), the reversing valve (2) and the second heat exchanger (9) are electrically connected with the main circuit board (12).

Images