Refrigerant leakage guide device for heat pump system and indoor unit

Abstract

The present application relates to a kind of refrigerant leakage guiding device of heat pump system and indoor unit, including heat exchanger;Pipe joint assembly A, including first refrigerant pipe joint, second refrigerant pipe joint, first water pipe joint and second water pipe joint;Pipe assembly, including first refrigerant pipe, second refrigerant pipe, first water pipe, second water pipe, first sealing pipe and second sealing pipe;First sealing pipe sleeve is set to the outside of first refrigerant pipe and forms first annular passage, the junction of one end of first refrigerant pipe and first refrigerant pipe joint with first annular passage communication, second sealing pipe sleeve is set to the outside of second refrigerant pipe and forms second annular passage, the junction of one end of second refrigerant pipe and second refrigerant pipe joint with second annular passage communication.The present application prevents refrigerant enrichment in the interior of heat pump system.Reduce the probability that flammable refrigerant leaks into the indoor unit of heat pump system and then fire occurs.

Description

Technical Field

[0001] This invention relates to the field of heat pump technology, and in particular to a refrigerant leakage guide device and indoor unit for a heat pump system. Background Technology

[0002] Air source heat pumps provide comfortable underfloor heating and domestic hot water supply systems for people's lives. Currently, to achieve better thermal efficiency and environmental performance, the refrigerants used in heat pump systems are shifting from non-flammable refrigerants (such as R410A) to more efficient flammable refrigerants (such as R32, R290). However, the indoor units of heat pump systems are relatively sealed. If flammable refrigerant leaks into the indoor units, the increased concentration of flammable refrigerant within the units can easily lead to a fire if it comes into contact with electrical circuits or other sparks. Preventing flammable refrigerant leakage into the indoor units of heat pump systems is a pressing technical problem that needs to be solved in this field. Summary of the Invention

[0003] Therefore, the present invention provides a refrigerant leakage guide device and an indoor unit for preventing flammable refrigerant from leaking into the indoor unit of a heat pump system.

[0004] To solve the above-mentioned technical problems, the present invention provides a refrigerant leakage guiding device for a heat pump system, comprising: The heat exchanger has a gaseous refrigerant inlet, a liquid refrigerant outlet, a cold water inlet, and a hot water outlet; Pipe fitting assembly A includes a first refrigerant pipe fitting and a second refrigerant pipe fitting, one end of the first refrigerant pipe fitting is connected to the gaseous refrigerant inlet, and one end of the second refrigerant pipe fitting is connected to the liquid refrigerant outlet; The piping assembly includes a first refrigerant pipe and a second refrigerant pipe, one end of the first refrigerant pipe being connected to the other end of the first refrigerant pipe connector, and one end of the second refrigerant pipe being connected to the other end of the second refrigerant pipe connector; The piping assembly further includes: The first sealing tube is sleeved on the outside of the first refrigerant tube and forms a first annular channel between them. The end of the first annular channel near the heat exchanger is sealed, and the end of the first annular channel away from the heat exchanger is connected to the external environment. The connection between one end of the first refrigerant tube and the first refrigerant tube joint is connected to the first annular channel. The second sealing tube is sleeved on the outside of the second refrigerant tube and forms a second annular channel between them. The end of the second annular channel near the heat exchanger is sealed, and the end of the second annular channel away from the heat exchanger is connected to the external environment. The connection between one end of the second refrigerant tube and the second refrigerant tube connector is connected to the second annular channel.

[0005] Furthermore, the first sealing tube and the second sealing tube are flexible hoses. The first sealing tube is connected to the first refrigerant pipe joint by a first clamp, and the second sealing tube is connected to the second refrigerant pipe joint by a second clamp.

[0006] Furthermore, the first refrigerant pipe connector and the second refrigerant pipe connector have the same structure, both including a cylindrical connector portion A, wherein the cylindrical connector portion A is provided with a refrigerant channel A, and the refrigerant channel A at least penetrates the end face of the cylindrical connector portion A facing the outside of the heat exchanger; One end of the first refrigerant pipe is connected to the refrigerant channel A of the first refrigerant pipe joint, and one end of the first sealing pipe is sleeved on the cylindrical side of the first refrigerant pipe joint. One end of the second refrigerant pipe is connected to the refrigerant channel A of the second refrigerant pipe joint, and one end of the second sealing pipe is sleeved on the cylindrical side of the second refrigerant pipe joint.

[0007] Furthermore, the pipe fitting assembly A also includes a first water pipe fitting and a second water pipe fitting, one end of the first water pipe fitting is connected to the cold water inlet, and one end of the second water pipe fitting is connected to the hot water outlet; The piping assembly also includes a first water pipe and a second water pipe, one end of the first water pipe being connected to the other end of the first water pipe connector, and one end of the second water pipe being connected to the other end of the second water pipe connector. It also includes a pipe connector assembly B, which includes a third refrigerant pipe connector, a fourth refrigerant pipe connector, a third water pipe connector, and a fourth water pipe connector. One end of the third refrigerant pipe connector is connected to the other end of the first refrigerant pipe, and the other end of the third refrigerant pipe connector is used for external connection. One end of the fourth refrigerant pipe connector is connected to the other end of the second refrigerant pipe, and the other end of the fourth refrigerant pipe connector is used for external connection. One end of the third water pipe connector is connected to the other end of the first water pipe, and the other end of the third water pipe connector is used for external connection. One end of the fourth water pipe connector is connected to the other end of the second water pipe, and the other end of the fourth water pipe connector is used for external connection.

[0008] Furthermore, the third and fourth refrigerant pipe connectors have the same structure, both including a cylindrical connector portion B and a tubular connector portion. The cylindrical connector portion B is provided with a refrigerant channel B and a refrigerant discharge channel. The refrigerant channel B passes through both end faces of the cylindrical connector portion B, and the refrigerant discharge channel passes through both end faces of the cylindrical connector portion B. The tubular connector portion is connected to one end of the refrigerant channel B. The other end of the first refrigerant pipe is connected to the other end of the refrigerant channel B of the third refrigerant pipe joint, and the other end of the first sealing pipe is sleeved on the outer cylindrical surface of the third refrigerant pipe joint and is clamped to the outer cylindrical surface of the third refrigerant pipe joint by the third clamp. The other end of the second refrigerant pipe is connected to the other end of the refrigerant channel B of the fourth refrigerant pipe joint, and the other end of the second sealing pipe is sleeved on the outer cylindrical surface of the fourth refrigerant pipe joint and is clamped to the outer cylindrical surface of the fourth refrigerant pipe joint by the fourth clamp.

[0009] Furthermore, the cylindrical connector B is provided with a plurality of refrigerant discharge channels, which are evenly distributed around the refrigerant channel B.

[0010] Furthermore, it also includes an insulation box, in which the heat exchanger is disposed. One end of the first refrigerant pipe, the second refrigerant pipe, the first water pipe, the second water pipe, the first sealing pipe, and the second sealing pipe extends into the insulation box and is connected to the heat exchanger. The other end of the first refrigerant pipe, the second refrigerant pipe, the first water pipe, the second water pipe, the first sealing pipe, and the second sealing pipe extends out of the insulation box.

[0011] Furthermore, the insulated box includes a box body and a box cover, the heat exchanger is disposed in the box body, the box cover is connected to the opening of the box body, and the box cover is provided with a clearance hole for the pipeline assembly to pass through.

[0012] The present invention also provides an indoor unit of a heat pump system, including a housing and the aforementioned refrigerant leakage guiding device, wherein the refrigerant leakage guiding device is disposed in the housing, and the first annular channel and the second annular channel are in communication with the external environment of the housing.

[0013] Furthermore, the third refrigerant pipe connector, the fourth refrigerant pipe connector, the third water pipe connector, and the fourth water pipe connector of the refrigerant leakage guiding device are installed on the housing.

[0014] Compared with the prior art, the above-mentioned technical solution of the present invention has the following advantages: The refrigerant leakage guiding device and indoor unit of the heat pump system of the present invention, by setting a first sealing pipe and a second sealing pipe, form a first annular channel and a second annular channel. The connection between the first refrigerant pipe and the first refrigerant pipe joint is located in the first annular channel, and the connection between the second refrigerant pipe and the second refrigerant pipe joint is located in the second annular channel. This guides the refrigerant leaking from the connection between the pipe assembly and the pipe joint assembly A to the open environment, preventing the refrigerant from accumulating inside the heat pump system. This reduces the probability of flammable refrigerant leaking into the indoor unit of the heat pump system and causing a fire. Attached Figure Description

[0015] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the refrigerant leakage guiding device of the heat pump system in this invention; Figure 2 This is a schematic diagram showing the refrigerant leakage guiding device of the heat pump system in this invention. Figure 3 This is a schematic diagram of pipe connector assembly A in this invention; Figure 4 This is a schematic diagram of the pipe connector assembly B in this invention; Figure 5 This is a schematic diagram of the indoor unit of the heat pump system in this invention; Figure 6 This is a schematic diagram of refrigerant discharge during refrigerant leakage in this invention.

[0017] Explanation of reference numerals in the instruction manual: 1. Heat exchanger; 22. First refrigerant pipe connector; 23. Second refrigerant pipe connector; 24. First water pipe connector; 25. Second water pipe connector; 26. Cylindrical connector part A; 27. Refrigerant passage A; 32. First refrigerant pipe; 33. Second refrigerant pipe; 34. First water pipe; 35. Second water pipe; 36. First sealing pipe; 37. Second sealing pipe; 41. First clamp; 42. Second clamp; 43. Third clamp; 44. Fourth clamp; 51. Third refrigerant pipe connector; 52. Fourth refrigerant pipe connector; 53. Third water pipe connector; 54. Fourth water pipe connector; 55. Cylindrical connector part B; 551. Refrigerant discharge channel; 56. Pipe-shaped connector part; 6. Insulated box; 61. Box body; 62. Box lid; 621. Clearance hole; 7. Outer shell. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention. Example 1

[0019] See Figures 1 to 4 As shown, this invention provides an embodiment of a refrigerant leakage guiding device for a heat pump system.

[0020] A refrigerant leakage guide device for a heat pump system includes: Heat exchanger 1 has a gaseous refrigerant inlet, a liquid refrigerant outlet, a cold water inlet, and a hot water outlet; Pipe connector assembly A includes a first refrigerant pipe connector 21, a second refrigerant pipe connector 22, a first water pipe connector 23, and a second water pipe connector 24. One end of the first refrigerant pipe connector 21 is connected to the gaseous refrigerant inlet, one end of the second refrigerant pipe connector 22 is connected to the liquid refrigerant outlet, one end of the first water pipe connector 23 is connected to the cold water inlet, and one end of the second water pipe connector 24 is connected to the hot water outlet. The piping assembly includes a first refrigerant pipe 31, a second refrigerant pipe 32, a first water pipe 33 and a second water pipe 34, a first sealing pipe 35, and a second sealing pipe 36. One end of the first refrigerant pipe 31 is connected to the other end of the first refrigerant pipe connector 21; one end of the second refrigerant pipe 32 is connected to the other end of the second refrigerant pipe connector 22; one end of the first water pipe 33 is connected to the other end of the first water pipe connector 23; one end of the second water pipe 34 is connected to the other end of the second water pipe connector 24; and the first sealing pipe 35 is sleeved on the outside of the first refrigerant pipe 31, forming a first annular channel (not shown in the figure) between them. The annular channel is sealed at one end near the heat exchanger 1, and the end of the first annular channel away from the heat exchanger 1 is connected to the external environment. The connection between one end of the first refrigerant pipe 31 and the first refrigerant pipe connector 21 is connected to the first annular channel. The second sealing pipe 36 is sleeved on the outside of the second refrigerant pipe 32 and forms a second annular channel (not shown in the figure) between them. The end of the second annular channel near the heat exchanger 1 is sealed, and the end of the second annular channel away from the heat exchanger 1 is connected to the external environment. The connection between one end of the second refrigerant pipe 32 and the second refrigerant pipe connector 22 is connected to the second annular channel.

[0021] The aforementioned heat exchanger 1 is a condenser used to transfer heat from the hot fluid to the cold fluid. High-temperature and high-pressure gaseous refrigerant enters the heat exchanger 1 through the gaseous refrigerant inlet, and cold water enters the heat exchanger 1 through the cold water inlet. In the heat exchanger 1, the refrigerant and water exchange heat. After releasing heat, the gaseous refrigerant turns into liquid refrigerant and is discharged from the liquid refrigerant outlet. After absorbing heat, the cold water turns into hot water and is discharged from the hot water outlet.

[0022] The pipe fitting assembly A is sealed to the heat exchanger 1, for example, by welding them together, or by integrally molding the pipe fitting assembly A and the housing of the heat exchanger 1, to ensure that the connection between the pipe fitting assembly A and the heat exchanger 1 will not leak.

[0023] The first refrigerant pipe 31 is used to introduce gaseous refrigerant into the heat exchanger 1, the second refrigerant pipe 32 is used to receive liquid refrigerant discharged from the heat exchanger 1, the first water pipe 33 is used to introduce cold water into the heat exchanger 1, and the second water pipe 34 is used to receive hot water discharged from the heat exchanger 1. To facilitate the connection between the pipe assembly and the pipe fitting assembly A, they are usually connected by quick-connect methods, such as threaded connections or snap-fit ​​connections. However, this makes it difficult to ensure a sealed connection between the pipe assembly and the pipe fitting assembly A, and leaks are prone to occur at the connection point.

[0024] By setting up a first sealing pipe 35 and a second sealing pipe 36, a first annular channel and a second annular channel are formed. The connection between the first refrigerant pipe 31 and the first refrigerant pipe connector 21 is located in the first annular channel, and the connection between the second refrigerant pipe 32 and the second refrigerant pipe connector 22 is located in the second annular channel. This guides refrigerant leaking from the connection between the piping assembly and the pipe connector assembly A to the open environment, preventing refrigerant from accumulating inside the heat pump system. This reduces the probability of flammable refrigerant leaking into the indoor unit of the heat pump system and causing a fire.

[0025] In this embodiment, the first sealing tube 35 and the second sealing tube 36 are flexible hoses. The first sealing tube 35 is connected to the first refrigerant pipe joint 21 by the first clamp 41, and the second sealing tube 36 is connected to the second refrigerant pipe joint 22 by the second clamp 42.

[0026] On the one hand, it is desirable that the first sealing tube 35 can be quickly connected to the first refrigerant pipe connector 21, and the second sealing tube 36 can be quickly connected to the second refrigerant pipe connector 22. On the other hand, it is desirable that the connection between the first sealing tube 35 and the first refrigerant pipe connector 21 has a good seal, and the connection between the second sealing tube 36 and the second refrigerant pipe connector 22 has a good seal. Furthermore, it is desirable that the shapes of the first sealing tube 35 and the first refrigerant pipe 31 and the second sealing tube 36 can be easily adapted to each other. Setting the first sealing tube 35 and the second sealing tube 36 as flexible hoses can simultaneously and effectively meet the requirements of quick connection, sealing connection, and easy deformation of the first sealing tube 35 and the second sealing tube 36.

[0027] In this embodiment, the first refrigerant pipe connector 21 and the second refrigerant pipe connector 22 have the same structure, both including a cylindrical connector portion A25. The cylindrical connector portion A25 is provided with a refrigerant channel A251, which at least penetrates the end face of the cylindrical connector portion A25 facing the outside of the heat exchanger 1. One end of the first refrigerant pipe 31 is connected to the refrigerant channel A of the first refrigerant pipe joint 21, and one end of the first sealing pipe 35 is sleeved on the cylindrical side of the first refrigerant pipe joint 21 and is clamped to the cylindrical side of the first refrigerant pipe joint 21 by the first clamp 41. One end of the second refrigerant pipe 32 is connected to the refrigerant channel A of the second refrigerant pipe joint 22, and one end of the second sealing pipe 36 is sleeved on the cylindrical side of the second refrigerant pipe joint 22 and is clamped to the cylindrical side of the second refrigerant pipe joint 22 by the second clamp 42.

[0028] The outer diameter of the cylindrical connector A25 and the diameter of the refrigerant channel A251 should not differ too much. If the difference is too small, the resulting first and second annular channels will be too narrow, affecting the refrigerant's flow guidance effect. Therefore, the distance between the inner wall of the first sealing tube 35 and the outer wall of the first refrigerant tube 31 should be greater than 2 mm. By providing the cylindrical connector A25, the first and second annular channels can be formed, and the cylindrical outer surface of the connector A25 can more easily form a sealed connection with the first sealing tube 35 and the second sealing tube 36.

[0029] In this embodiment, a pipe connector assembly B is also included. The pipe connector assembly B includes a third refrigerant pipe connector 51, a fourth refrigerant pipe connector 52, a third water pipe connector 53, and a fourth water pipe connector 54. One end of the third refrigerant pipe connector 51 is connected to the other end of the first refrigerant pipe 31, and the other end of the third refrigerant pipe connector 51 is used for external connection. One end of the fourth refrigerant pipe connector 52 is connected to the other end of the second refrigerant pipe 32, and the other end of the fourth refrigerant pipe connector 52 is used for external connection. One end of the third water pipe connector 53 is connected to the other end of the first water pipe 33, and the other end of the third water pipe connector 53 is used for external connection. One end of the fourth water pipe connector 54 is connected to the other end of the second water pipe 34, and the other end of the fourth water pipe connector 54 is used for external connection.

[0030] By setting the above-mentioned pipe joint assembly B, the first refrigerant pipe 31 and the end of the first sealing pipe 35 away from the heat exchanger are kept at a set distance, and the second refrigerant pipe 32 and the end of the second sealing pipe 36 away from the heat exchanger are kept at a set distance. At the same time, it is convenient to connect the first refrigerant pipe 31, the second refrigerant pipe 32, the first water pipe 33 and the second water pipe 34 to the outside.

[0031] In this embodiment, the third refrigerant pipe connector 51 and the fourth refrigerant pipe connector 52 have the same structure, both including a cylindrical connector portion B55 and a tubular connector portion 56. The cylindrical connector portion B55 is provided with a refrigerant channel B (not shown in the figure) and a refrigerant discharge channel 551. The refrigerant channel B passes through the two end faces of the cylindrical connector portion B55, and the refrigerant discharge channel 551 passes through the two end faces of the cylindrical connector portion B55. The tubular connector portion 56 is connected to one end of the refrigerant channel B. The other end of the first refrigerant pipe 31 is connected to the other end of the refrigerant passage B of the third refrigerant pipe joint 51, and the other end of the first sealing pipe 35 is sleeved on the outer cylindrical surface of the third refrigerant pipe joint 51 and is clamped to the outer cylindrical surface of the third refrigerant pipe joint 51 by the third clamp 43. The other end of the second refrigerant pipe 32 is connected to the other end of the refrigerant passage B of the fourth refrigerant pipe joint 52, and the other end of the second sealing pipe 36 is sleeved on the outer cylindrical surface of the fourth refrigerant pipe joint 52 and is clamped to the outer cylindrical surface of the fourth refrigerant pipe joint 52 by the fourth clamp 44.

[0032] The outer diameter of the cylindrical connector B55 and the diameter of the refrigerant channel B should not differ too much. If the difference is too small, the resulting first and second annular channels will be too narrow, affecting the refrigerant's flow guidance effect. The distance between the inner wall of the first sealing tube 35 and the outer wall of the first refrigerant tube 31 should be greater than 2 mm. The inner diameter of the refrigerant discharge channel 551 should be greater than 2 mm, and there should be at least one such channel. By providing the cylindrical connector B55, the first and second annular channels can be formed, and the cylindrical outer surface of the connector B55 can more easily form a sealed connection with the first sealing tube 35 and the second sealing tube 36.

[0033] In this embodiment, the cylindrical connector portion B55 is provided with a plurality of refrigerant discharge channels 551, and the plurality of refrigerant discharge channels 551 are evenly distributed around the refrigerant channel B.

[0034] By setting multiple refrigerant discharge channels 551, the refrigerant in the first annular channel and the second annular channel can be discharged quickly and evenly.

[0035] In this embodiment, an insulation box 6 is also included. The heat exchanger 1 is disposed in the insulation box 6. One end of the first refrigerant pipe 31, the second refrigerant pipe 32, the first water pipe 33, the second water pipe 34, the first sealing pipe 35, and the second sealing pipe 36 extends into the insulation box 6 and is connected to the heat exchanger 1. The other end of the first refrigerant pipe 31, the second refrigerant pipe 32, the first water pipe 33, the second water pipe 34, the first sealing pipe 35, and the second sealing pipe 36 extends out of the insulation box 6.

[0036] Since the main purpose of a heat pump system is to heat cold water and discharge hot water, the aforementioned insulation box 6 can serve as a heat insulation device to reduce heat loss after the water is heated.

[0037] In this embodiment, the insulated box 6 includes a box body 61 and a box cover 62. The heat exchanger 1 is disposed in the box body 61. The box cover 62 is connected to the opening of the box body 61. The box cover 62 is provided with a clearance hole 621 for the pipeline assembly to pass through.

[0038] The heat exchanger 1 needs to be installed inside the insulation box 6. The insulation box 6 is set as a split type to facilitate the installation of the heat exchanger 1 inside the insulation box 6.

[0039] See Figure 5 As shown, this invention provides an indoor unit for a heat pump system.

[0040] The indoor unit of the heat pump system includes a housing 7 and the aforementioned refrigerant leakage guide device, which is disposed in the housing 7. The first annular channel and the second annular channel are in communication with the external environment of the housing 7.

[0041] The indoor unit of the heat pump system is located indoors, so it is necessary to use an outer casing 7 to house all other parts of the indoor unit of the heat pump system except for the outer casing 7, so that the indoor unit of the heat pump system becomes a whole, while the outer casing 7 serves as a dustproof and protective function.

[0042] In this embodiment, the third refrigerant pipe joint 51, the fourth refrigerant pipe joint 52, the third water pipe joint 53, and the fourth water pipe joint 54 of the refrigerant leakage guiding device are installed on the housing 7.

[0043] The indoor unit of a heat pump system also needs to be connected to other components, such as the chilled water source unit, hot water usage unit, expansion device, compressor, and evaporator, to achieve the recycling of refrigerant. A heat pump is a device that transfers heat energy from a low-temperature heat source to a high-temperature heat source, primarily used for cooling and heating. It operates in a reverse cycle, consuming only a small amount of energy to extract heat from a low-temperature object and transfer it to a high-temperature environment, thus achieving highly efficient energy utilization. The compressor compresses the low-temperature, low-pressure refrigerant gas into a high-temperature, high-pressure gas, then releases heat through the condenser, and finally, the expansion valve causes the refrigerant to evaporate and absorb heat in the evaporator, thus completing the transfer of heat energy.

[0044] See Figure 6 This diagram illustrates the discharge of leaked gas during a refrigerant leak. The leaked refrigerant will be discharged to the outside of the indoor unit along the first and second annular channels.

[0045] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A refrigerant leakage guiding device for a heat pump system, comprising: The heat exchanger has a gaseous refrigerant inlet, a liquid refrigerant outlet, a cold water inlet, and a hot water outlet; Pipe fitting assembly A includes a first refrigerant pipe fitting and a second refrigerant pipe fitting, one end of the first refrigerant pipe fitting is connected to the gaseous refrigerant inlet, and one end of the second refrigerant pipe fitting is connected to the liquid refrigerant outlet; The piping assembly includes a first refrigerant pipe and a second refrigerant pipe, one end of the first refrigerant pipe being connected to the other end of the first refrigerant pipe connector, and one end of the second refrigerant pipe being connected to the other end of the second refrigerant pipe connector; The pipeline assembly is characterized in that it further includes: The first sealing tube is sleeved on the outside of the first refrigerant tube and forms a first annular channel between them. The end of the first annular channel near the heat exchanger is sealed, and the end of the first annular channel away from the heat exchanger is connected to the external environment. The connection between one end of the first refrigerant tube and the first refrigerant tube joint is connected to the first annular channel. The second sealing tube is sleeved on the outside of the second refrigerant tube and forms a second annular channel between them. The end of the second annular channel near the heat exchanger is sealed, and the end of the second annular channel away from the heat exchanger is connected to the external environment. The connection between one end of the second refrigerant tube and the second refrigerant tube connector is connected to the second annular channel.

2. The refrigerant leakage guiding device according to claim 1, characterized in that, The first sealing tube and the second sealing tube are flexible hoses. The first sealing tube is connected to the first refrigerant pipe joint by a first clamp, and the second sealing tube is connected to the second refrigerant pipe joint by a second clamp.

3. The refrigerant leakage guiding device according to claim 1, characterized in that, The first refrigerant pipe connector and the second refrigerant pipe connector have the same structure, both including a cylindrical connector part A, wherein the cylindrical connector part A is provided with a refrigerant channel A, and the refrigerant channel A at least penetrates the end face of the cylindrical connector part A facing the outside of the heat exchanger; One end of the first refrigerant pipe is connected to the refrigerant channel A of the first refrigerant pipe joint, and one end of the first sealing pipe is sleeved on the cylindrical side of the first refrigerant pipe joint. One end of the second refrigerant pipe is connected to the refrigerant channel A of the second refrigerant pipe joint, and one end of the second sealing pipe is sleeved on the cylindrical side of the second refrigerant pipe joint.

4. The refrigerant leakage guiding device according to claim 1, characterized in that, The pipe fitting assembly A further includes a first water pipe fitting and a second water pipe fitting, one end of the first water pipe fitting is connected to the cold water inlet, and one end of the second water pipe fitting is connected to the hot water outlet. The piping assembly also includes a first water pipe and a second water pipe, one end of the first water pipe being connected to the other end of the first water pipe connector, and one end of the second water pipe being connected to the other end of the second water pipe connector. It also includes a pipe connector assembly B, which includes a third refrigerant pipe connector, a fourth refrigerant pipe connector, a third water pipe connector, and a fourth water pipe connector. One end of the third refrigerant pipe connector is connected to the other end of the first refrigerant pipe, and the other end of the third refrigerant pipe connector is used for external connection. One end of the fourth refrigerant pipe connector is connected to the other end of the second refrigerant pipe, and the other end of the fourth refrigerant pipe connector is used for external connection. One end of the third water pipe connector is connected to the other end of the first water pipe, and the other end of the third water pipe connector is used for external connection. One end of the fourth water pipe connector is connected to the other end of the second water pipe, and the other end of the fourth water pipe connector is used for external connection.

5. The refrigerant leakage guiding device according to claim 4, characterized in that, The third and fourth refrigerant pipe connectors have the same structure, both including a cylindrical connector portion B and a tubular connector portion. The cylindrical connector portion B is provided with a refrigerant channel B and a refrigerant discharge channel. The refrigerant channel B passes through both end faces of the cylindrical connector portion B, and the refrigerant discharge channel passes through both end faces of the cylindrical connector portion B. The tubular connector portion is connected to one end of the refrigerant channel B. The other end of the first refrigerant pipe is connected to the other end of the refrigerant channel B of the third refrigerant pipe joint, and the other end of the first sealing pipe is sleeved on the outer cylindrical surface of the third refrigerant pipe joint and is clamped to the outer cylindrical surface of the third refrigerant pipe joint by the third clamp. The other end of the second refrigerant pipe is connected to the other end of the refrigerant channel B of the fourth refrigerant pipe joint, and the other end of the second sealing pipe is sleeved on the outer cylindrical surface of the fourth refrigerant pipe joint and is clamped to the outer cylindrical surface of the fourth refrigerant pipe joint by the fourth clamp.

6. The refrigerant leakage guiding device according to claim 5, characterized in that, The cylindrical connector B is provided with multiple refrigerant discharge channels, which are evenly distributed around the refrigerant channel B.

7. The refrigerant leakage guiding device according to claim 1, characterized in that, It also includes an insulation box, in which the heat exchanger is disposed. One end of the first refrigerant pipe, the second refrigerant pipe, the first water pipe, the second water pipe, the first sealing pipe, and the second sealing pipe extends into the insulation box and is connected to the heat exchanger. The other end of the first refrigerant pipe, the second refrigerant pipe, the first water pipe, the second water pipe, the first sealing pipe, and the second sealing pipe extends out of the insulation box.

8. The refrigerant leakage guiding device according to claim 7, characterized in that, The insulated box includes a box body and a box cover. The heat exchanger is located in the box body, and the box cover is connected to the opening of the box body. The box cover is provided with a clearance hole for the pipeline assembly to pass through.

9. An indoor unit of a heat pump system, characterized in that, The device includes a housing and a refrigerant leakage guiding device as described in any one of claims 1 to 8, wherein the refrigerant leakage guiding device is disposed in the housing, and the first annular channel and the second annular channel are in communication with the external environment of the housing.

10. The indoor unit of the heat pump system according to claim 9, characterized in that, The third refrigerant pipe connector, the fourth refrigerant pipe connector, the third water pipe connector, and the fourth water pipe connector of the refrigerant leakage guiding device according to any one of claims 4 to 6 are installed on the housing.

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