Heat pump system

Abstract

The utility model relates to a heat pump system which comprises a first water tank, a first heat pump main machine, a second water tank and a second heat pump main machine. The first water tank comprises a first water inlet and a first water outlet which are used for supplementing water; when the first heat pump main machine operates, prepared hot water is stored in the first water tank. The second water tank comprises a second water inlet and a second water outlet used for outputting hot water. When the second heat pump main machine operates, prepared hot water is stored in the second water tank. And the first water outlet of the first water tank is connected with the second water inlet of the second water tank. According to the utility model, the two heat pump hosts are independently controlled, so that the effects of decoupling control and simple control are achieved; and moreover, the two heat pump main machines are used for preparing hot water in a step-by-step heating mode, so that the preparation time of the hot water is shortened, and the output hot water amount is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to a heat pump system. Background Art

[0002] Heat pumps can obtain low-potential air heat energy from the environment, so heat pumps can be used to prepare hot water. Multi-stage / cascade heat pumps are a highly efficient heat pump system that can meet the high-temperature hot water needs of most occasions, but conventional multi-stage / cascade heat pumps involve linkage control of multiple heat pump systems, making system control too complicated. Utility Model Content

[0003] The utility model aims at the above-mentioned defects of the prior art and provides an improved heat pump system.

[0004] The technical solution adopted by the utility model to solve the technical problem is: construct a heat pump system, including:

[0005] A first water tank, the first water tank comprising a first water inlet and a first water outlet for replenishing water;

[0006] a first heat pump host, wherein when the first heat pump host is in operation, the prepared hot water is stored in the first water tank;

[0007] a second water tank, the second water tank comprising a second water inlet and a second water outlet for outputting hot water;

[0008] a second heat pump host, wherein when the second heat pump host is in operation, the prepared hot water is stored in the second water tank;

[0009] Wherein, the first water outlet of the first water tank is connected to the second water inlet of the second water tank.

[0010] In some embodiments, the second water outlet is connected to a water outlet pipeline, and the water outlet pipeline is used to connect to a water terminal device.

[0011] In some embodiments, the first water outlet is also connected to the water outlet pipeline.

[0012] In some embodiments, the heat pump system also includes a first reversing valve, which includes a first valve port, a second valve port, and a third valve port. The first valve port is connected to the first water outlet, the second valve port is connected to the second water inlet, and the third valve port is connected to the water outlet pipeline.

[0013] In some embodiments, the first water inlet is connected to a water inlet pipeline, and the water inlet pipeline is used to connect to a tap water end.

[0014] In some embodiments, the second water inlet is also connected to the water inlet pipeline.

[0015] In some embodiments, the heat pump system further includes a second reversing valve and a third reversing valve;

[0016] The second reversing valve comprises a fourth valve port, a fifth valve port, and a sixth valve port;

[0017] The third reversing valve comprises a seventh valve port, an eighth valve port, and a ninth valve port;

[0018] The fourth valve port is connected to the water inlet pipeline, the fifth valve port is connected to the first water inlet, and the sixth valve port is connected to the seventh valve port; the eighth valve port is connected to the first water outlet, and the ninth valve port is connected to the second water inlet.

[0019] In some embodiments, the second water outlet is connected to a water outlet pipeline, and the water outlet pipeline is used to connect to a water terminal device;

[0020] The third reversing valve also includes a tenth valve port, and the tenth valve port is connected to the water outlet pipeline.

[0021] In some embodiments, the second reversing valve is a three-way valve, and the third reversing valve is a four-way valve.

[0022] In some embodiments, the heat pump system also includes a water pump, which is connected between the first water inlet and the water outlet of the water outlet pipe, and is used to circulate and pump the cooled water remaining in the water outlet pipe after coming out of the second water tank into the first water tank.

[0023] The heat pump system of the present invention has the following beneficial effects:

[0024] The heat pump system includes a first heat pump host and a second heat pump host. When the first heat pump host is in operation, the prepared hot water is stored in the first water tank. When the second heat pump host is in operation, the prepared hot water is stored in the second water tank. The two heat pump hosts are controlled separately to heat the water in one water tank separately, thereby achieving the effect of control decoupling and simple control.

[0025] Moreover, the first water tank and the second water tank are connected in series, the first water inlet of the first water tank is used to replenish water, and the second water outlet of the second water tank is used to output hot water. In this way, hot water is prepared by step-by-step heating through two heat pump hosts, which shortens the hot water preparation time and increases the amount of hot water that can be output. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0027] Figure 1 is a structural schematic diagram of a heat pump system in a first embodiment of the utility model;

[0028] Figure 2 is a schematic structural diagram of a heat pump system in a second embodiment of the present utility model;

[0029] Figure 3 is a schematic structural diagram of a heat pump system in a third embodiment of the present utility model;

[0030] Figure 4 It is a structural schematic diagram of a heat pump system in the fourth embodiment of the present utility model.

[0031] In the accompanying drawings, 1. the first heat pump host, 11. the first water tank, 111. the first water inlet, 112. the first water outlet, 2. the second heat pump host, 21. the second water tank, 211. the second water inlet, 212. the second water outlet, 31. the water inlet pipeline, 32. the tap water end, 33. the water outlet pipeline, 331. the water outlet, 34. the water terminal equipment, 35. the connecting pipeline, 4. the first reversing valve, 41. the first valve port, 42. the second valve port, 43. the third valve port, 5. the second reversing valve, 51. the fourth valve port, 52. the fifth valve port, 53. the sixth valve port, 6. the third reversing valve, 61. the seventh valve port, 62. the eighth valve port, 63. the ninth valve port, 64. the tenth valve port, 7. the water pump. DETAILED DESCRIPTION

[0032] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "upper" and "lower" are based on the directions or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific direction. They are only for the convenience of describing the present technical solution, and do not indicate that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0033] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "connected", "connected", "set", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0034] Figure 1 The heat pump system of the first embodiment of the utility model is shown as follows: Figure 1 As shown, the heat pump system includes a first heat pump host 1 and a second heat pump host 2. The first heat pump host 1 includes a first water tank 11. When the first heat pump host 1 is running, the prepared hot water is stored in the first water tank 11; the second heat pump host 2 includes a second water tank 21. When the second heat pump host 2 is running, the prepared hot water is stored in the second water tank 21. It can be understood that the first heat pump host 1 and the second heat pump host 2 are controlled separately to heat the water in one water tank separately, which has the effect of control decoupling and simple control.

[0035] In other embodiments, the first heat pump host 1 may not include the first water tank 11, and the first water tank 11 may be provided separately; the second heat pump host 2 may not include the second water tank 21, and the second water tank 21 may be provided separately.

[0036] The first water tank 11 includes a first water inlet 111 and a first water outlet 112 for replenishing water; the second water tank 21 includes a second water inlet 211 and a second water outlet 212 for outputting hot water; the first water outlet 112 of the first water tank 11 is connected to the second water inlet 211 of the second water tank 21, so that the first water tank 11 and the second water tank 21 are connected in series.

[0037] In this embodiment, the first water inlet 111 can be used to replenish cold water; the first water inlet 111 is connected to the water inlet pipeline 31, and the water inlet pipeline 31 is used to connect the tap water end 32. It can be understood that the first water inlet 111 of the first water tank 11 is connected to the tap water end 32 through the water inlet pipeline 31, so that the tap water end 32 replenishes cold water to the first water tank 11 through the water inlet pipeline 31 and the first water inlet 111, providing a heatable water source for the heat pump system.

[0038] Of course, the water inlet pipe 31 can also be used to connect other water sources, such as river water, sea water, surface water, groundwater, etc., which can provide a continuous flow of water to the heat pump system. Of course, the first water inlet 111 can also be used to supplement warm water or hot water, which can further shorten the heating time of the heat pump system.

[0039] The second water outlet 212 is connected to the water outlet pipe 33, and the water outlet pipe 33 is used to connect to the water terminal device 34. It can be understood that the second water outlet 212 is connected to the water terminal device 34 through the water outlet pipe 33, so as to output the hot water prepared by the heat pump system and provide hot water to the water terminal device 34 for users to use. It can be understood that the water terminal device 34 can be a faucet or shower head in the bathroom, kitchen, wash basin, etc. that needs to use hot water.

[0040] The first water inlet 111 and the first water outlet 112 may be located on the same side of the first water tank 11, the second water inlet 211 and the second water outlet 212 may be located on the same side of the second water tank 21, and the water outlet of the first water tank 11 and the water outlet of the second water tank 21 are located on the same side, so as to facilitate the connection and disassembly between the corresponding water outlets and the corresponding pipelines. The first water outlet 112 may be arranged higher than the first water inlet 111, the second water outlet 212 may be arranged higher than the second water inlet 211, and the first water outlet 112 and the second water inlet 211 are connected through a connecting pipeline 35.

[0041] In this embodiment, the heat pump system has two operating modes:

[0042] 1) The second heat pump host 2 prepares hot water:

[0043] The water source passes through the water inlet pipe 31 from the tap water end 32 and is replenished to the first water tank 11 through the first water inlet 111. The water in the first water tank 11 is output from the first water outlet 112 and enters the second water tank 21 through the second water inlet 211. The second heat pump host 2 heats the water in the second water tank 21 to high-temperature hot water, and then provides it to the water terminal device 34 through the second water outlet 212 through the water outlet pipe 33. It can be understood that when the demand for hot water is not large, hot water can be prepared by the second heat pump host 2 close to the water terminal device 34. At this time, the first water tank 11 is equivalent to a water storage tank to ensure the stability of the water volume in the circuit;

[0044] 2) The first heat pump host 1 and the second heat pump host 2 simultaneously participate in preparing hot water:

[0045] The water source passes through the water inlet pipe 31 from the tap water end 32 and is replenished to the first water tank 11 through the first water inlet 111. After the first heat pump host 1 heats the water in the first water tank 11 to medium-temperature hot water, the medium-temperature hot water is output from the first water outlet 112 and enters the second water tank 21 through the second water inlet 211. After the second heat pump host 2 heats the medium-temperature hot water in the second water tank 21 to high-temperature hot water, it is provided to the water terminal device 34 through the second water outlet 212 through the water outlet pipe 33. It can be understood that the two heat pump hosts can shorten the preparation time of hot water and increase the amount of hot water that can be output by heating step by step.

[0046] It can be understood that in other embodiments, the medium-temperature hot water can also be the first preset temperature, and the high-temperature hot water can also be the second preset temperature in other embodiments. The second preset temperature can be set according to demand, and the second preset temperature is higher than the first preset temperature. In this embodiment, the first water tank 11 and the second water tank 21 are in series, and the water entering the second water tank 21 is the hot water heated by the first water tank 11. The first heat pump host 1 and the second heat pump host 2 heat the water in their respective water tanks step by step.

[0047] Specifically, assuming that the water temperature at the tap water end 32 is 20°C, that is, the water temperature at the first water inlet 111 entering the first water tank 11 from the first water inlet 111 is 20°C, after being heated by the first heat pump host 1, the water temperature rises to the first preset temperature of 40°C, that is, the water temperature output from the first water outlet 112 and entering the second water inlet 211 of the second water tank 21 is 40°C; after being heated by the second heat pump host 2, the water temperature rises to the second preset temperature of 60°C, that is, the water temperature output from the second water outlet 212 is 60°C.

[0048] This step-by-step heating mode reduces the water temperature difference required for each heat pump host and shortens the heating time required for each heat pump host. The two heat pump hosts can heat at the same time. This greatly shortens the heating time compared to working with only one heat pump host and heating the water temperature from 20°C to 60°C. That is, the two heat pump hosts can shorten the preparation time of hot water by step-by-step heating.

[0049] When the user's hot water consumption is not large, for example, there is only one shower head in the home that is releasing hot water, the heat pump system can achieve instant heating effect and provide users with sufficient hot water in a timely manner without the need to turn on additional auxiliary heating functions for domestic hot water such as electric heating.

[0050] Furthermore, the first water tank 11 of the first heat pump host 1 provides the heated water to the second water tank 21 of the second heat pump host 2, and the second water tank 21 provides the reheated water to the user. In this way, the final amount of hot water that can be output is the sum of the water amounts in the first water tank 11 and the second water tank 21. Compared with preparing hot water by only one heat pump host, the amount of hot water that can be provided is greatly improved.

[0051] The heat pump system can prepare hot water in multiple modes, including: cooling and full heat recovery mode, cooling and waste heat recovery mode, heating plus domestic hot water mode, pure hot water mode, cooling mode, heating mode, etc. It can be understood that in summer, when the heat pump system is in cooling and full heat recovery mode, cooling and waste heat recovery mode, when the user does not use much hot water, for example, when there is only one shower head at home for family members to take a bath in sequence, the heat recovered can basically meet the domestic hot water demand.

[0052] Of course, in other embodiments, the heat pump system may also include a third heat pump host or more heat pump hosts, each of which includes a water tank. When each heat pump host is running, the prepared hot water is stored in its water tank. The water tanks of the third heat pump host or more heat pump hosts are connected in series between the first water tank 11 and the second water tank 21, thereby realizing multi-stage step-by-step heating.

[0053] Figure 2 The heat pump system of the second embodiment of the utility model is shown as follows: Figure 2 As shown, the difference between this embodiment and the first embodiment is that the first water outlet 112 is also connected to the water outlet pipeline 33, so that when the second heat pump host 2 cannot work normally, the heated water in the first water tank 11 of the first heat pump host 1 can be output from the first water outlet 112 through the water outlet pipeline 33 to ensure the normal water use of the user. At the same time, when the second heat pump host 2 cannot work normally, the first heat pump host 1 can be used as a backup device to improve the safety performance of the heat pump system.

[0054] In this embodiment, the heat pump system may further include a first reversing valve 4 to connect the first water outlet 112 with the water outlet pipeline 33. Specifically, the first reversing valve 4 includes a first valve port 41, a second valve port 42, and a third valve port 43, wherein the first valve port 41 is connected to the first water outlet 112, the second valve port 42 is connected to the second water inlet 211, and the third valve port 43 is connected to the water outlet pipeline 33.

[0055] It can be understood that since the first water tank 11 of the first heat pump host 1 and the second water tank 21 of the second heat pump host 2 are in series relationship, when the first heat pump host 1 and the second heat pump host 2 are both operating normally, the water source is replenished to the first water tank 11 from the tap water end 32 through the water inlet pipe 31 via the first water inlet 111. After the first heat pump host 1 heats the water in the first water tank 11 to medium-temperature hot water, the medium-temperature hot water is output from the first water outlet 112 and enters the second water tank 21 through the first valve port 41 and the second valve port 42 of the first reversing valve 4 via the second water inlet 211. After the second heat pump host 2 heats the medium-temperature hot water in the second water tank 21 to high-temperature hot water, it is provided to the water-using terminal device 34 from the second water outlet 212 via the water outlet pipe 33.

[0056] When the first heat pump host 1 is working normally and the second heat pump host 2 fails or cannot prepare domestic hot water due to other reasons, water is replenished from the tap water end 32 through the water inlet pipe 31 and the first water inlet 111 to the first water tank 11. After the first heat pump host 1 heats the water in the first water tank 11, the heated water is output from the first water outlet 112 and enters the water outlet pipe 33 through the first valve port 41 and the third valve port 43 of the first reversing valve 4, and is then provided to the water terminal device 34.

[0057] It can be understood that, through the setting of the first reversing valve 4 , the first heat pump host 1 can directly provide hot water to the water terminal device 34 through the first reversing valve 4 without relying on the second heat pump host 2 to supply water to the water terminal device 34 .

[0058] It can be understood that the corresponding water ports, valve ports and pipelines can be connected through the connecting pipeline 35. Among them, the first reversing valve 4 can be a three-way valve. Of course, the first reversing valve 4 can also be implemented by other structures that can achieve the same function.

[0059] Figure 3 The heat pump system of the third embodiment of the utility model is shown as follows: Figure 3 As shown, the difference between this embodiment and the above-mentioned first embodiment is that the second water inlet 211 is also connected to the water inlet pipe 31, so that when the first heat pump host 1 cannot work normally, the tap water end 32 directly provides water to the second water tank 21, without relying on the first heat pump host 1 to provide water, so as to ensure normal water use for users.

[0060] In this embodiment, the heat pump system further includes a second reversing valve 5 and a third reversing valve 6 to connect the second water inlet 211 with the water inlet pipeline 31. Specifically, the second reversing valve 5 includes a fourth valve port 51, a fifth valve port 52, and a sixth valve port 53; the third reversing valve 6 includes a seventh valve port 61, an eighth valve port 62, and a ninth valve port 63, the fourth valve port 51 is connected to the water inlet pipeline 31, the fifth valve port 52 is connected to the first water inlet 111, and the sixth valve port 53 is connected to the seventh valve port 61; the eighth valve port 62 is connected to the first water outlet 112, and the ninth valve port 63 is connected to the second water inlet 211.

[0061] It can be understood that when the first heat pump host 1 and the second heat pump host 2 are both operating normally, water from the tap water end 32 passes through the water inlet pipe 31 via the fourth valve port 51 and the fifth valve port 52 into the first water inlet 111 and is replenished to the first water tank 11. After the first heat pump host 1 heats the water in the first water tank 11 to medium-temperature hot water, it is output from the first water outlet 112 and enters the second water tank 21 through the eighth valve port 62 and the ninth valve port 63 of the third reversing valve 6 via the second water inlet 211. After the second heat pump host 2 heats the medium-temperature hot water in the second water tank 21 to high-temperature hot water, it is provided to the water-using terminal device 34 from the second water outlet 212 via the water outlet pipe 33.

[0062] When the first heat pump host 1 fails or cannot prepare domestic hot water for other reasons and the second heat pump host 2 operates normally, water from the tap water end 32 passes through the water inlet pipe 31 and enters the third reversing valve 6 via the fourth valve port 51 and the sixth valve port 53 of the second reversing valve 5, and enters the second water inlet 211 of the second water tank 21 through the seventh valve port 61 and the ninth valve port 63 of the third reversing valve 6 to be replenished to the second water tank 21. After the second heat pump host 2 heats the water in the second water tank 21, it is provided to the water-using terminal device 34 from the second water outlet 212 through the water outlet pipe 33.

[0063] In this embodiment, the third reversing valve 6 further includes a tenth valve port 64, and the tenth valve port 64 is connected to the water outlet pipeline 33. It can be understood that when the first heat pump host 1 works normally and the second heat pump host 2 fails or cannot prepare domestic hot water due to other reasons, the water source enters the first water inlet 111 of the first water tank 11 from the tap water end 32 through the water inlet pipeline 31 via the fourth valve port 51 and the fifth valve port 52 of the second reversing valve 5, and is replenished to the first water tank 11. After the first heat pump host 1 heats the water in the first water tank 11, it is provided to the water terminal device 34 from the first water outlet 112 via the eighth valve port 62 and the tenth valve port 64 from the water outlet pipeline 33, thereby not relying on the second heat pump host 2 to output hot water to the outside.

[0064] In this embodiment, by providing the second reversing valve 5 and the third reversing valve 6, the heat pump system can flexibly supply domestic hot water according to the operation of the heat pump host. Specifically, when the first heat pump host 1 cannot work normally, the tap water end 32 directly replenishes the water source to the second water tank 21 through the second water inlet 211, and the second heat pump host 2 heats the water in the second water tank 21, and then outputs it to the outside through the second water outlet 212 through the water outlet pipeline 33, without the need to provide water through the first heat pump host 1. When the second heat pump host 2 cannot work normally, the tap water end 32 replenishes the water source to the first water tank 11 through the first water inlet 111, and the first heat pump host 1 heats the water in the first water tank 11, and then outputs it to the outside through the first water outlet 112 through the water outlet pipeline 33, without the need to output hot water to the outside through the second heat pump host 2.

[0065] In this embodiment, when both the first heat pump host 1 and the second heat pump host 2 cannot work normally, water from the tap water end 32 passes through the water inlet pipe 31 via the fourth valve port 51 and the sixth valve port 53 of the second reversing valve 5 into the third reversing valve 6, and is provided to the water terminal device 34 by the water outlet pipe 33 via the seventh valve port 61 and the tenth valve port 64 of the third reversing valve 6, so as to avoid affecting the normal water use of the user. It can be understood that when both the first heat pump host 1 and the second heat pump host 2 need to be inspected, it is only necessary to dismantle the connection between the first heat pump host 1 and the second heat pump host 2 and the corresponding pipelines, and no major changes need to be made to the pipelines.

[0066] It can be understood that the corresponding water inlets, valve ports, and pipelines can be connected through the connecting pipeline 35. Among them, the second reversing valve 5 can be a three-way valve, and the third reversing valve 6 can be a four-way valve. Of course, the second reversing valve 5 and the third reversing valve 6 can also be implemented by other structures that can achieve the same function.

[0067] Figure 4 The heat pump system of the fourth embodiment of the utility model is shown as follows: Figure 4 As shown, the difference between this embodiment and the first embodiment mentioned above is that the heat pump system also includes a water pump 7, which is connected between the first water inlet 111 and the water outlet 331 of the water outlet pipe 33, and is used to circulate and pump the cooled water remaining in the water outlet pipe 33 after coming out of the second water tank 21 into the first water tank 11.

[0068] It can be understood that the water pump 7 circulates and draws the cooled water remaining in the water outlet pipe 33 after the water comes out of the second water tank 21 into the first water tank 11, and uses it as a water source for normal heating, thereby avoiding that the water coming out of the water terminal device 34 is zero cold water, that is, ensuring that the water coming out of the water terminal device 34 is hot water (hot immediately after it is turned on), thereby improving the user experience. Among them, the water pump 7 is a zero cold water pump.

[0069] The heat pump system of the fifth embodiment of the utility model is different from the second embodiment in that the heat pump system further includes a water pump 7, and the arrangement of the water pump 7 is the same as that of the water pump 7 of the fourth embodiment.

[0070] The heat pump system of the sixth embodiment of the utility model is different from the third embodiment in that the heat pump system further includes a water pump 7, and the arrangement of the water pump 7 is the same as that of the water pump 7 of the fourth embodiment.

[0071] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should belong to the scope covered by the claims of the utility model.

Claims

1. A heat pump system, characterized in that: include: A first water tank (11), the first water tank (11) comprising a first water inlet (111) and a first water outlet (112) for replenishing water; A first heat pump main unit (1), wherein when the first heat pump main unit (1) is in operation, the prepared hot water is stored in the first water tank (11); A second water tank (21), the second water tank (21) comprising a second water inlet (211) and a second water outlet (212) for outputting hot water; A second heat pump main unit (2), wherein when the second heat pump main unit (2) is in operation, the prepared hot water is stored in the second water tank (21); Wherein, the first water outlet (112) of the first water tank (11) is connected to the second water inlet (211) of the second water tank (21).

2. The heat pump system according to claim 1, characterized in that: The second water outlet (212) is connected to a water outlet pipeline (33), and the water outlet pipeline (33) is used to connect to a water terminal device (34).

3. The heat pump system according to claim 2, characterized in that: The first water outlet (112) is also connected to the water outlet pipeline (33).

4. The heat pump system according to claim 3, characterized in that: The heat pump system further comprises a first reversing valve (4), the first reversing valve (4) comprising a first valve port (41), a second valve port (42), and a third valve port (43), the first valve port (41) being connected to the first water outlet (112), the second valve port (42) being connected to the second water inlet (211), and the third valve port (43) being connected to the water outlet pipeline (33).

5. The heat pump system according to claim 1, characterized in that: The first water inlet (111) is connected to a water inlet pipeline (31), and the water inlet pipeline (31) is used to connect to a tap water end (32).

6. The heat pump system according to claim 5, characterized in that: The second water inlet (211) is also connected to the water inlet pipeline (31).

7. The heat pump system according to claim 6, characterized in that: The heat pump system further comprises a second reversing valve (5) and a third reversing valve (6); The second reversing valve (5) comprises a fourth valve port (51), a fifth valve port (52), and a sixth valve port (53); The third reversing valve (6) comprises a seventh valve port (61), an eighth valve port (62), and a ninth valve port (63); The fourth valve port (51) is connected to the water inlet pipeline (31), the fifth valve port (52) is connected to the first water inlet (111), and the sixth valve port (53) is connected to the seventh valve port (61); the eighth valve port (62) is connected to the first water outlet (112), and the ninth valve port (63) is connected to the second water inlet (211).

8. The heat pump system according to claim 7, characterized in that: The second water outlet (212) is connected to a water outlet pipeline (33), and the water outlet pipeline (33) is used to connect to a water terminal device (34); The third reversing valve (6) further comprises a tenth valve port (64), and the tenth valve port (64) is connected to the water outlet pipeline (33).

9. The heat pump system according to claim 8, characterized in that: The second reversing valve (5) is a three-way valve, and the third reversing valve (6) is a four-way valve.

10. The heat pump system according to claim 2, characterized in that: The heat pump system further comprises a water pump (7), which is connected between the first water inlet (111) and the water outlet (331) of the water outlet pipeline (33) and is used for circulating the cooled water remaining in the water outlet pipeline (33) after exiting the second water tank (21) into the first water tank (11).

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