Heat pump unit

Abstract

The utility model relates to the technical field of air conditioning, and discloses a heat pump unit. The heat pump unit comprises a refrigerating system; a hot water heat exchanger; the hot water heat exchange pipeline exchanges heat with the hot water heat exchanger; one end of the first connecting pipeline is connected with the refrigerating system, and the other end of the first connecting pipeline can be connected with the first end of the hot water heat exchange pipeline; one end of the second connecting pipeline is connected with the refrigerating system, and the other end of the second connecting pipeline can be connected with the second end of the hot water heat exchange pipeline; wherein the first connecting pipeline is provided with a second switch used for controlling on-off of the first connecting pipeline, and the second connecting pipeline is provided with a third switch used for controlling on-off of the second connecting pipeline. In this way, the hot water heat exchange pipeline can be disconnected from the first connecting pipeline or the second connecting pipeline, and therefore a user can flexibly select whether the hot water heat exchange pipeline is installed or not and the time for installing the hot water heat exchange pipeline according to the needs of the user.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a heat pump unit. Background Art

[0002] Heat pumps are a new energy system that utilizes natural energy (heat storage in air, water, or soil) for both cooling and heating. For example, using soil heat storage as an example, heat pumps can provide cooling in the summer without a cooling tower and heating in the winter without a boiler or electric heater. Therefore, heat pumps are widely used in areas requiring centralized water supply, such as schools, hotels, and large residential buildings.

[0003] In the prior art, the hot water heat exchanger piping used to heat the hot water heat exchanger is directly connected to the refrigeration system, resulting in the hot water heat exchange piping being installed simultaneously with the refrigeration system. However, not all users require a hot water heat exchanger, so this design cannot meet all user needs.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Utility Model Content

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The embodiments of the present disclosure provide a heat pump unit to solve the problem in the related art that a hot water heat exchange pipeline and a refrigeration system need to be installed at the same time.

[0007] An embodiment of the present utility model provides a heat pump unit, comprising: a refrigeration system, including a compressor, a first heat exchanger and a second heat exchanger connected to each other; a hot water heat exchanger; a hot water heat exchange pipeline, cooperating with the hot water heat exchanger to exchange heat with the hot water heat exchanger; a first connecting pipeline, one end of the first connecting pipeline is connected to the refrigeration system, and the other end of the first connecting pipeline can be connected to the first end of the hot water heat exchange pipeline; a second connecting pipeline, one end of the second connecting pipeline is connected to the refrigeration system, and the other end of the second connecting pipeline can be connected to the second end of the hot water heat exchange pipeline; wherein, the first connecting pipeline is provided with a second switch for controlling the on and off of the first connecting pipeline, and the second connecting pipeline is provided with a third switch for controlling the on and off of the second connecting pipeline.

[0008] Optionally, the second switch is provided with a first connecting portion, the first end of the hot water heat exchange pipeline is provided with a first connecting fitting portion, and the first connecting portion and the first connecting fitting portion are detachably connected.

[0009] Optionally, the second switch is a stop valve.

[0010] Optionally, the third switch is provided with a second connecting portion, the second end of the hot water heat exchange pipeline is provided with a second connecting fitting portion, and the second connecting portion and the second connecting fitting portion are detachably connected.

[0011] Optionally, the third switch is a stop valve.

[0012] Optionally, the heat pump unit also includes: a first reversing member, including first to fourth interfaces, the first interface is connected to the exhaust port of the compressor, the second interface is connected to the first connection port of the first heat exchanger, the third interface is connected to the first connection port of the second heat exchanger, and the fourth interface is connected to the return air port of the compressor through a return air pipeline; wherein, one end of the first connection pipeline is connected between the first interface and the exhaust port of the compressor.

[0013] Optionally, the heat pump unit also includes: a first throttling element; a second throttling element, the second connection port of the first heat exchanger, the first throttling element, the second throttling element, and the second connection port of the second heat exchanger are connected in sequence; wherein, one end of the second connecting pipe is connected between the first throttling element and the second throttling element.

[0014] Optionally, the first throttling element includes a first electronic expansion valve; and / or the second throttling element includes a second electronic expansion valve.

[0015] Optionally, the heat pump unit further includes: a third throttling element, which is arranged in the second connecting pipeline.

[0016] Optionally, the heat pump unit further includes: a filter, which is arranged in the second connecting pipeline.

[0017] The heat pump unit provided by the embodiments of the present disclosure can achieve the following technical effects:

[0018] The first connecting pipeline is provided with a second switch for controlling the on / off of the first connecting pipeline, so that the refrigerant of the refrigeration system cannot flow out of the first connecting pipeline. The second connecting pipeline is provided with a third switch for controlling the on / off of the second connecting pipeline, so that the refrigerant of the refrigeration system cannot flow out of the second connecting pipeline. In this way, the hot water heat exchange pipeline can be disconnected from the first connecting pipeline, and the hot water heat exchange pipeline can also be disconnected from the second connecting pipeline. As a result, the hot water heat exchange pipeline does not need to be installed together with the refrigeration system and will not cause the refrigerant of the refrigeration system to flow out. Users can then flexibly choose whether to install the hot water heat exchange pipeline, the time to install the hot water heat exchange pipeline, and the method of using the hot water heat exchanger according to their own needs, thereby improving user satisfaction with the heat pump unit.

[0019] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0021] Figure 1 1 is a schematic structural diagram of a heat pump device in cooling mode provided by an embodiment of the present disclosure, wherein the arrow indicates the flow direction of the refrigerant;

[0022] Figure 2 1 is a schematic structural diagram of a heat pump device in heating mode provided by an embodiment of the present disclosure, wherein the arrow indicates the flow direction of the refrigerant;

[0023] Figure 3 1 is a schematic structural diagram of a heat pump device for domestic hot water supply provided by an embodiment of the present disclosure, wherein the arrow indicates the flow direction of the refrigerant;

[0024] Figure 4 1 is a schematic structural diagram of a heat pump device in a non-heat recovery mode provided by an embodiment of the present disclosure, wherein the arrow indicates the flow direction of the refrigerant;

[0025] Figure 5 1 is a schematic structural diagram of a heat recovery mode of a heat pump device provided by an embodiment of the present disclosure, wherein the direction of the arrow indicates the flow direction of the refrigerant;

[0026] Figure 6 It is a structural schematic diagram of a partial heat recovery mode of a heat pump device provided by an embodiment of the present disclosure, wherein the direction of the arrow indicates the flow direction of the refrigerant.

[0027] Reference numerals:

[0028] 10. Compressor; 20. First reversing member; 201. First interface; 202. Second interface; 203. Third interface; 204. Fourth interface; 30. First heat exchanger; 301. First connection port of the first heat exchanger; 302. Second connection port of the first heat exchanger; 303. First water inlet pipe; 304. First water outlet pipe; 40. Second heat exchanger; 402. First connection port of the second heat exchanger; 401. Second connection port of the second heat exchanger; 403. Second water inlet pipe Pipeline; 404, second water outlet pipeline; 50, first throttling element; 60, second throttling element; 70, branch pipeline; 701, hot water heat exchange pipeline; 702, first connecting pipeline; 703, second connecting pipeline; 80, hot water heat exchanger; 104, filter; 105, second switch; 106, third switch; 107, auxiliary heating device; 108, expansion tank; 109, water pump; 110, drain valve; 111, gas-liquid separator; 112, third throttling element. DETAILED DESCRIPTION

[0029] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0030] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0031] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0032] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0033] Unless otherwise stated, the term "plurality" means two or more.

[0034] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0035] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A, or B, or A and B.

[0036] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0037] Combine Figure 1-6 As shown, an embodiment of the present disclosure provides a heat pump device, including a connected compressor 10, a first reversing member 20, a first heat exchanger 30, a second heat exchanger 40, and a first throttling element 50, a second throttling element 60, a branch pipe 70 and a hot water heat exchanger 80.

[0038] Among them, the first reversing member 20 includes first to fourth interfaces 204, the first interface 201 is connected to the exhaust port of the compressor 10, the second interface 202 is connected to the first connection port 301 of the first heat exchanger, the third interface 203 is connected to the first connection port 402 of the second heat exchanger, and the fourth interface 204 is connected to the return air port of the compressor 10 through the return air pipeline.

[0039] The second connection port 302 of the first heat exchanger, the first throttling element 50 , the second throttling element 60 , and the second connection port 401 of the second heat exchanger are connected in sequence.

[0040] A first end of the branch line 70 is connected between the first port 201 and the exhaust port of the compressor 10 , and a second end of the branch line 70 is connected between the first throttling element 50 and the second throttling element 60 .

[0041] The hot water heat exchanger 80 corresponds to the branch pipe 70 to exchange heat with the branch pipe 70 , so that the hot water heat exchanger 80 can provide hot water.

[0042] The hot water heat exchanger 80 corresponds to the branch pipe 70, which means that the hot water heat exchanger 80 can exchange heat with the branch pipe 70. For example, the branch pipe 70 is wrapped around the outside of the hot water heat exchanger 80, or the branch pipe 70 is arranged close to the hot water heat exchanger 80, or the hot water heat exchanger 80 is in the form of a plate heat exchanger, which includes a first chamber and a second chamber. The refrigerant in the branch pipe 70 flows into the first chamber of the plate heat exchanger, and the water flows into the second chamber of the plate heat exchanger. The first chamber and the second chamber exchange heat, thereby realizing heat exchange between the refrigerant in the branch pipe 70 and the water flow, increasing the water flow temperature, and realizing hot water production.

[0043] A first throttling element 50 and a second throttling element 60 are disposed between the second connection port 302 of the first heat exchanger and the second connection port 401 of the second heat exchanger. Furthermore, the second end of the branch line 70 is connected between the first throttling element 50 and the second throttling element 60. In addition to their throttling function, the first throttling element 50 and the second throttling element 60 also function to open and close the pipelines in which they are located. This eliminates the need for the complex valve unit typically found in related art, thereby simplifying the structure and control logic of the heat pump device.

[0044] The first heat exchanger 30 can be a ground source heat exchanger, a water source heat exchanger, or an air source heat exchanger. For example, if the first heat exchanger 30 is a ground source heat exchanger, the ground source heat exchanger has a first water inlet pipe 303 and a first water outlet pipe 304 connected to a ground source for heat exchange with the ground source. The ground source heat exchanger is a tubular water-fluorine heat exchanger.

[0045] The second heat exchanger 40 can be a floor heating air disc plate heat exchanger, a sleeve or plate water-fluorine heat exchanger, and has a second water inlet pipe 403 and a second water outlet pipe 404 connected to the floor heating air disc.

[0046] The second water inlet pipe 403 is connected to the expansion tank 108 , the water pump 109 , and the drain valve 110 . The second water outlet pipe 404 is connected to the auxiliary heating device 107 .

[0047] The hot water heat exchanger 80 has a third water inlet pipe for cold water to enter and a third water outlet pipe for hot water to flow out.

[0048] The first reversing member 20 may be a four-way valve, or a combination of other valves.

[0049] Optionally, the first throttling element 50 includes a first electronic expansion valve.

[0050] The first electronic expansion valve can achieve both throttling and on-off control, thereby simplifying the structure of the heat pump device.

[0051] Optionally, the second throttling element 60 includes a second electronic expansion valve.

[0052] The second electronic expansion valve can achieve both throttling and on-off control, thereby simplifying the structure of the heat pump device.

[0053] Optionally, the branch pipeline 70 includes a hot water heat exchange pipeline 701 , and the hot water heat exchange pipeline 701 exchanges heat with the hot water heat exchanger 80 .

[0054] The hot water heat exchange pipeline 701 exchanges heat with the hot water heat exchanger 80 , thereby exchanging heat with the hot water heat exchanger 80 , so that the hot water heat exchanger 80 can provide hot water for users.

[0055] The hot water heat exchanger 80 corresponds to the hot water heat exchange pipeline 701, which means that the hot water heat exchanger 80 can exchange heat with the hot water heat exchange pipeline 701. For example, the hot water heat exchange pipeline 701 is wrapped around the outside of the hot water heat exchanger 80, or the hot water heat exchange pipeline 701 is arranged close to the hot water heat exchanger 80, or the hot water heat exchanger 80 is in the form of a plate heat exchanger, and the plate heat exchanger includes a first chamber and a second chamber. The refrigerant in the hot water heat exchange pipeline 701 flows into the first chamber of the plate heat exchanger, and the water flows into the second chamber of the plate heat exchanger. The first chamber and the second chamber exchange heat, thereby realizing heat exchange between the refrigerant in the hot water heat exchange pipeline 701 and the water flow, increasing the water flow temperature, and realizing hot water production.

[0056] The heat pump device further includes a third throttling element 112 , which is disposed in the branch pipeline 70 . Along the direction from the first end to the second end of the branch pipeline 70 , the hot water heat exchange pipeline 701 and the third throttling element 112 are sequentially disposed.

[0057] The third throttle element 112 not only has a throttling effect on the refrigerant, but also controls the opening and closing of the branch line 70 to control whether the refrigerant flows through the branch line 70. When the third throttle element 112 is open, the branch line 70 is open, the refrigerant flows through the branch line 70, and the hot water heat exchanger 80 can produce hot water. When the third throttle element 112 is closed, the branch line 70 is disconnected, the refrigerant does not flow through the branch line 70, and the hot water heat exchanger 80 cannot produce hot water.

[0058] Optionally, the third throttling element 112 includes a third electronic expansion valve.

[0059] The third electronic expansion valve can achieve both throttling and on-off control, thereby simplifying the structure of the heat pump device.

[0060] Optionally, the heat pump device further includes a gas-liquid separator 111 , which is connected between the return air port of the compressor 10 and the fourth interface 204 .

[0061] The heat pump device in this application is an integrated system with a fixed refrigerant filling amount. There is no need to add additional refrigerant to the long refrigerant pipeline. Therefore, the system flow path does not need to separately set up components such as the gas-liquid separator 111, the oil separator and the subcooling (economizer) to achieve multiple modes and efficient operation, and the flow path is simple.

[0062] Optionally, the heat pump device also includes a controller, which is connected to the first reversing member 20, the first throttling element, the second throttling element and the third throttling element, and is configured to: in the heat recovery mode, control the first throttling element 50 to close, and control one of the second throttling element 60 and the third throttling element 112 to open, and the other is in a throttling state.

[0063] like Figure 5 As shown, in the heat recovery mode, i.e., the refrigeration and domestic hot water production mode, the first throttling element 50 is closed, the pipeline where the first heat exchanger 30 is located is disconnected, and no refrigerant flows through the first heat exchanger 30. The second throttling element 60 is opened, and the refrigerant flows through the pipeline where the second throttling element 60 is located, but the second throttling element 60 does not throttle the refrigerant, and the third throttling element 112 is in a throttling state. Alternatively, the second throttling element 60 is in a throttling state, the third throttling element 112 is opened, and the refrigerant flows through the pipeline where the third throttling element 112 is located, but the third throttling element 112 does not throttle the refrigerant.

[0064] At this time, the refrigerant flowing out of the exhaust port of the compressor 10 passes through the branch pipe 70, the branch pipe 70 exchanges heat with the hot water heat exchanger 80 to produce hot water, and then passes through the second throttling element 60 or the third throttling element 112 to throttle, flows into the second heat exchanger 40, the second heat exchanger 40 evaporates and cools, and then flows back to the return air port of the compressor 10 through the third interface 203 and the fourth interface 204.

[0065] Optionally, the heat pump device also includes a controller, which is connected to the first reversing member 20, the first throttling element, the second throttling element and the third throttling element, and is configured to: in the partial heat recovery mode, control the second throttling element 60 to be in a throttling state, and control the first throttling element 50 and the third throttling element to be open.

[0066] like Figure 6 As shown, the partial heat recovery mode is a refrigeration and domestic hot water production mode. In this mode, the first throttling element 50 and the third throttling element are both open and do not have the throttling function, and the second throttling element 60 performs the throttling effect.

[0067] At this time, the refrigerant flowing out of the exhaust port of the compressor 10 is divided into two paths. One path passes through the branch pipe 70, and the branch pipe 70 exchanges heat with the hot water heat exchanger 80 to produce hot water. The other path flows into the first heat exchanger 30 through the first interface 201 and the second interface 202. After the two paths are merged, they flow through the second throttling element 60 for throttling and flow into the second heat exchanger 40. The second heat exchanger 40 evaporates and cools, and then flows back to the return air port of the compressor 10 through the third interface 203 and the fourth interface 204.

[0068] If the first throttling element 50 and the third throttling element 112 are used for throttling, and the second throttling element 60 is not used for throttling, then if the hot water heat exchanger 80 and the first heat exchanger 30 require different heat loads, the amount of refrigerant flowing through the branch pipe 70 and the first heat exchanger 30 will be different, resulting in a pressure difference between the refrigerant after throttling by the first throttling element 50 and the second throttling element 60. Therefore, the second throttling element 60 is selected for throttling.

[0069] Optionally, the heat pump device also includes a controller, which is connected to the first reversing member 20, the first throttling element, the second throttling element and the third throttling element, and is configured to: in the domestic hot water supply mode, control the second throttling element 60 to be closed, and control one of the first throttling element 50 and the third throttling element to be open, and the other to be in a throttling state.

[0070] like Figure 3 As shown, in the domestic hot water supply mode, the refrigerant flowing out of the exhaust port of the compressor 10 passes through the branch pipe 70, the branch pipe 70 exchanges heat with the hot water heat exchanger 80 to produce hot water, and then passes through the first throttling element 50 or the third throttling element 112 to flow into the first heat exchanger 30, and then flows back to the return air port of the compressor 10 through the second interface 202 and the fourth interface 204.

[0071] Optionally, the heat pump device also includes a controller, which is connected to the first reversing member 20, the first throttling element, the second throttling element and the third throttling element, and is configured to: in the non-heat recovery mode, control the first throttling element 50 to be in a throttling state, and control the second throttling element 60 and the third throttling element to be open.

[0072] like Figure 4 As shown, the non-heat recovery mode is a heating and domestic hot water production mode. The refrigerant flowing out of the exhaust port of the compressor 10 is divided into two paths. One path passes through the branch pipe 70, where it exchanges heat with the hot water heat exchanger 80 to produce hot water. The other path flows through the first port 201 and the third port 203 into the second heat exchanger 40, where it is condensed and heated. After the two paths merge, they flow through the first throttling element 50 for throttling, flow into the first heat exchanger 30, and then return to the return air port of the compressor 10 through the second port 202 and the fourth port 204.

[0073] In this mode, if the first throttling element 50 is controlled to be in an open state and the second throttling element 60 and the third throttling element 112 are controlled to be throttled, there will also be a problem of pressure difference in the refrigerant after throttling by the second throttling element 60 and the third throttling element 112.

[0074] The heat pump device of the present application can also operate in cooling mode and heating mode.

[0075] like Figure 1 As shown, in the cooling mode, the third throttling element 112 is closed and the branch pipe 70 is disconnected. The refrigerant flowing out of the exhaust port of the compressor 10 enters the first heat exchanger 30 through the first interface 201 and the second interface 202 to condense and release heat, is throttled by the first throttling element 50 or the second throttling element 60, flows into the second heat exchanger 40, and the second heat exchanger 40 evaporates and cools, and then flows back to the return air port of the compressor 10 through the third interface 203 and the fourth interface 204.

[0076] In the heating mode, the third throttling element 112 is closed and the branch pipe 70 is disconnected. The refrigerant flowing out of the exhaust port of the compressor 10 enters the second heat exchanger 40 through the first interface 201 and the third interface 203 to condense and release heat, is throttled by the first throttling element 50 or the second throttling element 60, flows into the first heat exchanger 30, and then flows back to the return air port of the compressor 10 through the second interface 202 and the fourth interface 204.

[0077] Optionally, the branch pipeline 70 includes a hot water heat exchange pipeline 701 , a first connecting pipeline 702 and a second connecting pipeline 703 .

[0078] One end of the first connecting pipe 702 (i.e., the first end of the branch pipe 70) is connected to the refrigeration system, and the other end of the first connecting pipe 702 can be connected to the first end of the hot water heat exchange pipe 701; one end of the second connecting pipe 703 (i.e., the second end of the branch pipe 70) is connected to the refrigeration system, and the other end of the second connecting pipe 703 can be connected to the second end of the hot water heat exchange pipe 701.

[0079] The hot water heat exchange pipeline 701 , the first connecting pipeline 702 and the second connecting pipeline 703 are independent components. When the hot water heat exchanger 80 needs to be used, the first connecting pipeline 702 is connected to the hot water heat exchange pipeline 701 and the second connecting pipeline 703 is connected to the hot water heat exchange pipeline 701 .

[0080] The first connecting pipe 702 is provided with a second switch 105 for controlling the on / off switching of the first connecting pipe 702, thereby preventing the refrigerant of the refrigeration system from flowing out of the first connecting pipe 702. The second connecting pipe 703 is provided with a third switch 106 for controlling the on / off switching of the second connecting pipe 703, thereby preventing the refrigerant of the refrigeration system from flowing out of the second connecting pipe 703. In this way, the hot water heat exchange pipe 701 can be disconnected from the first connecting pipe 702, or the hot water heat exchange pipe 701 can be disconnected from the second connecting pipe 703. Thus, the hot water heat exchange pipe 701 does not need to be installed with the refrigeration system and will not cause the refrigerant of the refrigeration system to flow out. The user can then flexibly choose whether to install the hot water heat exchange pipe 701, the time to install the hot water heat exchange pipe 701, and the method of using the hot water heat exchanger 80 according to their needs, thereby improving user satisfaction with the heat pump device.

[0081] Optionally, the second switch 105 is provided with a first connecting portion, and the first end of the hot water heat exchange pipeline 701 is provided with a first connecting matching portion, and the first connecting portion and the first connecting matching portion are detachably connected.

[0082] The first connection portion and the first connection matching portion can be clamped or screwed, etc. Taking the clamping as an example, one of the first connection portion and the first connection matching portion is provided with a first buckle, and the other is provided with a first slot, and the first buckle is clamped with the first slot.

[0083] Optionally, the second switch 105 is a stop valve.

[0084] The stop valve can control the on-off of the first connecting pipeline 702 and has low cost. It is understandable that the second switch 105 can also be a solenoid valve.

[0085] Optionally, the third switch 106 is provided with a second connecting portion, and the second end of the hot water heat exchange pipeline 701 is provided with a second connecting matching portion, and the second connecting portion and the second connecting matching portion are detachably connected.

[0086] The second connection portion and the second connection matching portion can be clamped or screwed, etc. Taking clamping as an example, one of the second connection portion and the second connection matching portion is provided with a second buckle, and the other is provided with a second slot, and the second buckle is clamped with the second slot.

[0087] Optionally, the third switch 106 is a stop valve.

[0088] The stop valve can control the on-off of the second connecting pipeline 703 and has low cost. It is understandable that the third switch 106 can also be a solenoid valve.

[0089] Optionally, the heat pump device further includes a third throttling element 112 , and the third throttling element 112 is provided in the second connecting pipeline 703 .

[0090] Optionally, the one end of the first connecting pipe 702 is connected between the first interface 201 and the exhaust port of the compressor 10 .

[0091] Optionally, the one end of the second connecting line 703 is connected between the first throttling element 50 and the second throttling element 60 .

[0092] Optionally, the heat pump device further includes a filter 104 , and the filter 104 is disposed in the second connecting pipeline 703 .

[0093] The number of filters 104 provided in the second connecting pipeline 703 can be one or more. When there are more than one filters 104 , the multiple filters 104 are respectively located at both ends of the third throttling element 112 .

[0094] Optionally, filters 104 are provided between the first throttling element 50 and the second connecting port 302 of the first heat exchanger, between the first throttling element 50 and the second throttling element 60, and between the second throttling element 60 and the second connecting port 401 of the second heat exchanger.

[0095] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A heat pump unit, characterized in that: include: A refrigeration system comprising a compressor, a first heat exchanger, and a second heat exchanger connected to each other; hot water heat exchanger; A hot water heat exchange pipeline cooperates with the hot water heat exchanger to exchange heat with the hot water heat exchanger; a first connecting pipe, one end of which is connected to the refrigeration system, and the other end of which is connectable to the first end of the hot water heat exchange pipe; a second connecting pipe, one end of which is connected to the refrigeration system, and the other end of which is connectable to the second end of the hot water heat exchange pipe; The first connecting pipeline is provided with a second switch for controlling the on-off of the first connecting pipeline, and the second connecting pipeline is provided with a third switch for controlling the on-off of the second connecting pipeline.

2. The heat pump unit according to claim 1, characterized in that: The second switch is provided with a first connecting portion, the first end of the hot water heat exchange pipeline is provided with a first connecting matching portion, and the first connecting portion and the first connecting matching portion are detachably connected.

3. The heat pump unit according to claim 1, characterized in that: The second switch is a stop valve.

4. The heat pump unit according to claim 1, characterized in that The third switch is provided with a second connecting portion, and the second end of the hot water heat exchange pipeline is provided with a second connecting matching portion, and the second connecting portion and the second connecting matching portion are detachably connected.

5. The heat pump unit according to claim 1, characterized in that: The third switch is a stop valve.

6. The heat pump unit according to any one of claims 1 to 5, characterized in that: Also includes: A first reversing member includes first to fourth interfaces, the first interface being connected to the exhaust port of the compressor, the second interface being connected to the first connection port of the first heat exchanger, the third interface being connected to the first connection port of the second heat exchanger, and the fourth interface being connected to the return air port of the compressor via a return air pipeline; Wherein, the one end of the first connecting pipeline is connected between the first interface and the exhaust port of the compressor.

7. The heat pump unit according to claim 6, characterized in that: Also includes: a first throttle element; The second throttling element, the second connecting port of the first heat exchanger, the first throttling element, the second throttling element, and the second connecting port of the second heat exchanger are connected in sequence; The one end of the second connecting pipeline is connected between the first throttling element and the second throttling element.

8. The heat pump unit according to claim 7, characterized in that: The first throttling element includes a first electronic expansion valve; and / or The second throttling element includes a second electronic expansion valve.

9. The heat pump unit according to any one of claims 1 to 5, characterized in that: Also includes: The third throttling element is arranged in the second connecting pipeline.

10. The heat pump unit according to any one of claims 1 to 5, characterized in that: Also includes: The filter is arranged in the second connecting pipeline.

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