Heat exchanger and heat pump system

Abstract

The utility model relates to the technical field of heat exchanger defrosting, and discloses a heat exchanger which comprises a refrigerant pipe set and a defrosting pipe set. The number of the refrigerant pipe sets is multiple, and the multiple refrigerant pipe sets are arranged in sequence. The defrosting pipe sets are arranged between the adjacent refrigerant pipe sets. Wherein the refrigerant pipe sets are used for communicating refrigerants to exchange heat with inlet air flow, and the defrosting pipe sets are used for communicating defrosting media to heat and defrost the refrigerant pipe sets on the two sides. According to the heat pump system, the defrosting medium can be conducted through the defrosting pipe set to conduct defrosting on the refrigerant pipe set, the energy consumption of defrosting of the heat exchanger is reduced, and therefore the overall energy consumption of the heat pump system is reduced. The utility model further discloses a heat pump system.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchanger defrosting, and in particular to a heat exchanger and a heat pump system. Background Art

[0002] As users' requirements for heating energy consumption increase, heat pump water heaters, heaters, air conditioners and other equipment are widely used. However, when heat pump heating equipment is used in low temperature or high humidity areas, the outdoor unit evaporator of the heat pump system is prone to frost, resulting in poor overall heat exchange performance of the heat pump system and reduced heating capacity.

[0003] In the related art, there is a heat exchanger for a heat pump heating system, characterized in that it includes: a refrigerant coil and an electric heating wire. The refrigerant coil has a plurality of adjacent refrigerant flow pipes, the plurality of refrigerant flow pipes are arranged in sequence, and electric heating wires are laid between adjacent refrigerant flow pipe groups. In the case of frost on the evaporator, the evaporator can be defrosted by controlling the electric heating wire laid on the evaporator to be energized to heat the evaporator.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] Setting a heating wire to heat the heat exchanger for defrosting will increase the energy consumption of the heat exchanger for defrosting, affect the overall energy consumption of the heat pump system, and increase the cost.

[0006] 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 the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] 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 components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The disclosed embodiments provide a heat exchanger and a heat pump system, which utilize a defrost pipe group to conduct a defrost medium to defrost a refrigerant pipe group, thereby reducing the energy consumption of defrosting the heat exchanger and thus reducing the overall energy consumption of the heat pump system.

[0009] In some embodiments, the heat exchanger includes: a refrigerant tube group and a defrost tube group. There are multiple refrigerant tube groups, which are arranged in sequence; the defrost tube group is arranged between adjacent refrigerant tube groups; wherein the refrigerant tube group is used to conduct the refrigerant and the incoming air flow for heat exchange, and the defrost tube group is used to conduct the defrost medium to heat and defrost the refrigerant tube groups on both sides.

[0010] Optionally, the multiple refrigerant tube groups are arranged in sequence along a flow direction perpendicular to the incoming air flow, and the defrost tube group and the multiple refrigerant tube groups are in the same plane.

[0011] Optionally, each refrigerant pipe group includes a plurality of heat exchange pipes, and the plurality of heat exchange pipes are arranged in sequence along a flow direction perpendicular to the inlet air flow, and adjacent heat exchange pipes are connected to form a refrigerant pipe group.

[0012] Optionally, each defrost pipe group includes a plurality of circulation pipes, and the plurality of circulation pipes are arranged in sequence along a flow direction perpendicular to the inlet air flow, and adjacent circulation pipes are connected to form a defrost pipe group.

[0013] Optionally, the number of heat exchange pipes in the refrigerant pipe group is greater than the number of circulation pipes in the defrost pipe group.

[0014] Optionally, the number of heat exchange pipes in the refrigerant pipe group is twice the number of circulation pipes in the defrost pipe group.

[0015] Optionally, the refrigerant pipe group and the defrost pipe group are made of the same material.

[0016] Optionally, the heat exchanger further comprises: heat exchange fins. The refrigerant tube group and the defrost tube group are both arranged through the heat exchange fins.

[0017] Optionally, the defrost pipe group is connected to the return water pipe on the indoor side.

[0018] In some embodiments, a heat pump system includes: a heat exchanger according to any one of the above embodiments.

[0019] The heat exchanger and heat pump system provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] By setting up multiple refrigerant pipe groups to conduct the refrigerant and the incoming air flow for heat exchange, a defrost pipe group is set between adjacent refrigerant pipe groups, and the defrost medium is conducted through the defrost pipe group to heat the refrigerant pipe group, thereby defrosting the refrigerant pipe group, reducing the energy consumption of defrosting the heat exchanger, thereby reducing the overall energy consumption of the heat pump system.

[0021] 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

[0022] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0023] Figure 1 is a structural schematic diagram of a heat exchanger provided in an embodiment of the present disclosure;

[0024] Figure 2 is a schematic structural diagram of a refrigerant pipe group and a defrost pipe group provided in an embodiment of the present disclosure;

[0025] Figure 3 It is a schematic diagram of the connection between the return water pipeline and the defrost pipe group provided in the embodiment of the present disclosure;

[0026] Figure 4 is a structural schematic diagram of a heat pump system provided by an embodiment of the present disclosure;

[0027] Figure 5 is a schematic structural diagram of an indoor condenser provided in an embodiment of the present disclosure;

[0028] Figure 6 It is a schematic structural diagram of another heat pump system provided in an embodiment of the present disclosure.

[0029] Reference numerals:

[0030] 100, refrigerant pipe group; 110, heat exchange pipeline; 200, defrost pipe group; 210, circulation pipeline; 300, heat exchange fins; 400, return water pipeline; 500, indoor condenser; 510, heat exchange box; 520, condensing coil; 600, indoor heating unit; 700, heating water pipe; 710, water pump; 720, valve; 800, compressor; 900, connecting water pipe. DETAILED DESCRIPTION

[0031] In order to be able to understand the features and technical contents 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 attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the 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.

[0032] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0033] 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 have 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.

[0034] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0035] Unless otherwise stated, the term "plurality" means two or more.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0037] Combination Figure 1-Figure 3 As shown, in some embodiments, the heat exchanger includes: a refrigerant tube group 100 and a defrost tube group 200. There are multiple refrigerant tube groups 100, and the multiple refrigerant tube groups 100 are arranged in sequence; the defrost tube group 200 is arranged between adjacent refrigerant tube groups 100; wherein the refrigerant tube group 100 is used to conduct the refrigerant and the incoming air flow for heat exchange, and the defrost tube group 200 is used to conduct the defrost medium to heat and defrost the refrigerant tube groups 100 on both sides.

[0038] The heat exchanger provided by the embodiment of the present disclosure is adopted, and a plurality of refrigerant pipe groups 100 are arranged to conduct the refrigerant and the incoming air flow for heat exchange. A defrost pipe group 200 is arranged between adjacent refrigerant pipe groups 100. The defrost medium is conducted by the defrost pipe group 200 to heat the refrigerant pipe group 100, thereby defrosting the refrigerant pipe group 100, thereby reducing the energy consumption of defrosting the heat exchanger, thereby reducing the overall energy consumption of the heat pump system.

[0039] Optionally, adjacent refrigerant tube groups 100 are connected. In this way, multiple refrigerant tube groups 100 are connected in sequence to form a refrigerant flow path, simplifying the structure of the heat exchanger connected to the heat pump system and reducing the difficulty of external connection of the heat exchanger.

[0040] Optionally, the refrigerant tube group 100 and the defrost tube group 200 are made of the same material. In this way, the thermal resistance between the refrigerant tube group 100 and the defrost tube group 200 can be reduced, so that the defrost medium flowing in the defrost tube group 200 can more efficiently exchange heat with the refrigerant tube group 100, thereby improving the defrosting efficiency of the refrigerant tube group 100.

[0041] Optionally, the refrigerant pipe group 100 and the defrost pipe group 200 are both made of copper. In this way, the refrigerant pipe group 100 and the defrost pipe group 200 have strong oxidation resistance, a longer service life, and good thermal conductivity, thereby improving heat exchange efficiency.

[0042] Optionally, multiple refrigerant tube groups 100 are arranged in sequence along a flow direction perpendicular to the incoming air flow, and the defrost tube group 200 and the multiple refrigerant tube groups 100 are in the same plane. In this way, the incoming air flow is blown directly to the multiple refrigerant tube groups 100, which can increase the heat exchange efficiency between the multiple refrigerant tube groups 100 and the incoming air flow. The multiple refrigerant tube groups 100 and the defrost tube group 200 are arranged in the same plane, which can reduce the lateral width of the heat exchanger and reduce the occupied space of the heat exchanger.

[0043] Exemplarily, as shown in the figure, a plurality of refrigerant pipe groups 100 are arranged in sequence along the vertical direction, and the defrost pipe group 200 and the plurality of refrigerant pipe groups 100 are located in the same vertical plane.

[0044] Optionally, each refrigerant pipe group 100 includes a plurality of heat exchange pipes 110, and the plurality of heat exchange pipes 110 are arranged in sequence along a flow direction perpendicular to the inlet air flow, and adjacent heat exchange pipes 110 are connected to form a refrigerant pipe group 100. In this way, the refrigerant pipe group 100 is composed of a plurality of heat exchange pipes 110, which can increase the heat exchange area of ​​the refrigerant pipe group 100, thereby increasing the heat exchange effect between the heat exchanger and the inlet air flow. The plurality of heat exchange pipes 110 are also arranged along a flow direction perpendicular to the inlet air flow, which can reduce the lateral width of each refrigerant pipe group 100, thereby reducing the lateral width of the heat exchanger.

[0045] Exemplarily, as shown in the figure, the multiple heat exchange pipelines 110 in each refrigerant pipe group 100 are arranged in sequence along the vertical direction, and the multiple heat exchange pipelines 110 in each refrigerant pipe group 100 are in the same vertical plane.

[0046] Optionally, each defrost pipe group 200 includes a plurality of circulation pipes 210, and the plurality of circulation pipes 210 are arranged in sequence along a flow direction perpendicular to the air flow, and adjacent circulation pipes 210 are connected to form a defrost pipe group 200. In this way, since each refrigerant pipe group 100 is composed of a plurality of heat exchange pipes 110, the frosting area of ​​each refrigerant pipe group 100 is relatively large when frosting occurs, so each defrost pipe group 200 is also configured to be composed of a plurality of circulation pipes 210, so that the heating radiation area of ​​the defrost pipe group 200 can be adapted to the refrigerant pipe group 100, so as to better heat and defrost the refrigerant pipe group 100. The plurality of circulation pipes 210 are also arranged along a flow direction perpendicular to the air flow, so that the defrost pipe group 200 and the refrigerant pipe group 100 are in the same plane, reducing the width in the lateral direction.

[0047] Exemplarily, as shown in the figure, the multiple circulation pipes 210 in each defrost pipe group 200 are arranged in sequence along the vertical direction, and the multiple heat exchange pipes 110 and the multiple circulation pipes 210 are all in the same vertical plane.

[0048] Optionally, the inlet end of each defrost pipe group 200 is provided with an external input pipe, and the outlet end of each defrost pipe group 200 is provided with an external output pipe. When the heat exchanger is assembled in a heat pump system, the external input pipe and the external output pipe of each defrost pipe group 200 are independently connected to the outside, and the defrost medium is conducted to heat and defrost. In this way, if multiple defrost pipe groups 200 are interconnected, the defrost medium of the defrost pipe group 200 on the high temperature side of the multiple defrost pipe groups 200 will flow into the defrost pipe group 200 on the low temperature side for defrosting after heating the refrigerant pipe groups 100 on both sides, thereby causing a difference in the heating amount between each defrost pipe group 200, and poor defrosting uniformity of the heat exchanger. Therefore, an external input pipe and an external output pipe are provided on each defrost pipe group 200, so that each defrost pipe group 200 can independently conduct the defrost medium, ensure the defrosting temperature of each defrost pipe group 200, and improve the defrosting uniformity of the heat exchanger.

[0049] Optionally, the number of heat exchange pipes 110 in the refrigerant pipe group 100 is greater than the number of circulation pipes 210 in the defrost pipe group 200. In this way, since the heat exchanger is set on the outdoor side as the evaporator of the heat pump system for heat exchange, the stable operation of the heat pump system is guaranteed. As the heat exchange part in the heat exchanger, the refrigerant pipe group 100 needs to bear a relatively large amount of heat exchange. Therefore, the number of heat exchange pipes 110 in the refrigerant pipe group 100 is set to be greater than the number of circulation pipes 210 in the defrost pipe group 200, so as to increase the heat exchange area of ​​the refrigerant pipe group 100 and ensure the heat exchange of the heat exchanger. The defrost pipe group 200 is only used as a heat source to heat and defrost the refrigerant pipe group 100, so the defrosting demand can be met by setting the heating area of ​​the defrost pipe group 200 relatively small.

[0050] Optionally, the number of heat exchange pipes 110 in the refrigerant pipe group 100 is twice the number of circulation pipes 210 in the defrost pipe group 200. In this way, when frosting occurs during the heat exchange process of the refrigerant pipe group 100, the maximum frosting area of ​​the refrigerant pipe group 100 is its heat exchange area. Therefore, the number of heat exchange pipes 110 in the refrigerant pipe group 100 is set to twice the number of circulation pipes 210 in the defrost pipe group 200, so that the heating area of ​​the defrost pipe group 200 can match the heat exchange area of ​​the refrigerant pipe group 100, and while defrosting the refrigerant pipe group 100, the space occupied by the defrost pipe group 200 is reduced, thereby ensuring the heat exchange performance of the heat exchanger.

[0051] Specifically, the number of heat exchange pipes 110 in each refrigerant pipe group 100 is twice the number of circulation pipes 210 in each defrost pipe group 200 .

[0052] Exemplarily, three refrigerant tube groups 100 are provided, and two defrost tube groups 200 are provided. Each refrigerant tube group 100 includes four heat exchange pipelines 110, and each defrost tube group 200 includes two circulation pipelines 210. When the defrost tube group 200 is used to defrost the refrigerant tube groups 100 on both sides, the two circulation pipelines 210 radiate the eight heat exchange pipelines 110 on the upper and lower sides respectively, and the four heat exchange pipelines 110 in the refrigerant tube group 100 located in the middle position are surrounded by the four circulation pipelines 210 on the upper and lower sides. Since the refrigerant tube group 100 in the middle position is easy to frost, when the defrost tube group 200 conducts the defrost medium, the refrigerant tube group 100 in the middle position can be better defrosted.

[0053] Optionally, the heat exchanger further includes: heat exchange fins 300. The refrigerant tube group 100 and the defrost tube group 200 are both arranged through the heat exchange fins 300. In this way, the arrangement of the heat exchange fins 300 can increase the heat exchange area between the refrigerant tube group 100 and the incoming air flow, thereby improving the heat exchange efficiency of the heat exchanger. At the same time, the defrost tube group 200 can better radiate and conduct heat to the refrigerant tube group 100 through the fins, thereby defrosting the refrigerant tube group 100. At the same time, the slit position of the heat exchange fins 300 is prone to frost, and the heat of the defrost tube group 200 can also directly act on the heat exchange fins 300 for defrosting, further improving the defrosting effect of the heat exchanger.

[0054] Optionally, the defrost pipe group 200 is connected to the return water pipe 400 on the indoor side. In this way, the return water on the indoor side of the heat pump system is conducted to the defrost pipe group 200 through the return water pipe 400, and the return water is used as a defrosting medium to heat and defrost the refrigerant pipe group 100, and the waste heat in the return water is reused, thereby reducing the impact of heat exchanger defrosting on the indoor heating effect of the heat pump system and reducing the energy consumption of the heat pump system.

[0055] It can be understood that the water return pipe 400 is a part of the heat pump system.

[0056] Combination Figure 4-Figure 6 As shown, in some embodiments, a heat pump system includes: the heat exchanger of the above embodiment.

[0057] The heat pump system provided by the embodiment of the present disclosure can reduce the energy consumption of defrosting the heat exchanger, thereby reducing the overall energy consumption of the heat pump system.

[0058] Optionally, the heat exchanger of the above embodiment is arranged on the outdoor side and used as an evaporator, and the defrost pipe group 200 of the heat exchanger is connected to the output end of the return water pipeline 400 of the heat pump system.

[0059] Alternatively, if Figure 4 As shown, the heat pump system further includes: an indoor condenser 500, an indoor heating unit 600 and a heating water pipe 700. The heating water pipe 700 is sequentially arranged in the indoor condenser 500 and the indoor heating unit 600. The portion of the heating water pipe 700 arranged in the indoor condenser 500 exchanges heat with the indoor condenser 500, and the portion of the heating water pipe 700 arranged in the indoor heating unit 600 is used to release heat to the indoor side; the input end of the heating water pipe 700 is located at the water inlet side of the indoor condenser 500, the output end of the defrost pipe group 200 is connected to the input end of the heating water pipe 700, the output end of the heating water pipe 700 is located at the water outlet side of the indoor heating unit 600, and the output end of the heating water pipe 700 is connected to the input end of the return water pipe 400, and the output end of the return water pipe 400 is connected to the input end of the defrost pipe group 200. In this way. The heating water pipe 700, the return water pipe 400 and the defrost pipe group 200 in the heat exchanger are connected to form a circulation loop. The water in the heating water pipe 700 flows through the indoor condenser 500 for heat exchange and absorbs heat. The water that absorbs heat flows into the indoor heating unit 600 to release heat to heat the indoor side. The return water after heating flows into the return water pipe 400 and flows to the defrost pipe group 200 in the heat exchanger. The water temperature of the return water from the indoor heating unit 600 is used to heat and defrost the refrigerant pipe group 100 in the heat exchanger, thereby reducing the overall energy consumption of the heat pump system. The return water after defrosting flows into the heating water pipe 700 again, and then flows into the indoor condenser 500 again for heating.

[0060] It can be understood that the heat pump system also includes the necessary components of the refrigeration system such as the compressor 800 and the throttling element. The compressor 800, the indoor condenser 500, the throttling element and the heat exchanger are connected in sequence to form the refrigeration system of the heat pump system.

[0061] Optionally, the heat pump system further includes a water pump 710. The water pump 710 is connected to the heating water pipe 700. In this way, the water pump 710 is used to provide power for the water in the heating water pipe 700 to circulate, so that the water in the circulation loop formed by the heating water pipe 700, the return pipe 400 and the defrost pipe group 200 is circulated as a heating medium.

[0062] Optionally, the water pump 710 is connected to the position of the heating water pipe 700 located on the water inlet side of the indoor condenser 500. In this way, the temperature of the return water flowing into the input end of the heating water pipe 700 is reduced, and the water pump 710 is connected to the position of the heating water pipe 700 located on the water inlet side of the indoor condenser 500, and the return water after the temperature is reduced is used to cool the water pump 710, while absorbing the heat generated by the water pump 710 during operation.

[0063] It can be understood that the indoor heating unit 600 includes: a water heater, a radiator, etc., which will not be elaborated here.

[0064] Alternatively, if Figure 5 As shown, the indoor condenser 500 includes: a heat exchange box 510 and a condensing coil 520. The heat exchange box 510 is filled with a heat exchange medium; the condensing coil 520 is arranged in the heat exchange box 510 and immersed in the heat exchange medium, and the condensing coil 520 is connected to the refrigeration system of the heat pump system; wherein the heating water pipe 700 is partially penetrated in the heat exchange box 510 and immersed in the heat exchange medium. In this way, the condensing coil 520 can heat the heat exchange medium in the heat exchange box 510, and the heated heat exchange medium transfers the heat to the water flowing in the heating water pipe 700. Since the condensing coil 520 and the heating water pipe 700 are both immersed in the heat exchange medium inside the heat exchange box 510, the heat exchange mode of surrounding the condensing coil 520 and the heating water pipe 700 by the heat exchange medium is used to improve the heat exchange efficiency, so that the heat of the refrigerant in the condensing coil 520 is more efficiently transferred to the water in the heating water pipe 700.

[0065] It can be understood that the heat exchange medium can be a medium with high thermal conductivity such as water, which will not be described in detail here.

[0066] Optionally, a plurality of fins are provided on the outer wall of the condensing coil 520, and a plurality of fins are also provided on the outer wall of the heating water pipe 700 located in the heat exchange box 510. In this way, the heat exchange area between the condensing coil 520, the heating water pipe 700 and the heat exchange medium can be further increased, so that the heat of the refrigerant in the condensing coil 520 can be more efficiently transferred to the water in the heating water pipe 700.

[0067] Optionally, the portion of the heating water pipe 700 that passes through the heat exchange box 510 is a coil structure. In this way, the contact area between the heating water pipe 700 and the heat exchange medium in the heat exchange box 510 can be increased, so that the flow path of the water in the heating water pipe 700 is extended when flowing through the heat exchange box 510, and the heat exchange efficiency between the water in the heating water pipe 700 and the heat exchange medium in the heat exchange box 510 is improved, thereby improving the heating effect.

[0068] Alternatively, if Figure 6 As shown, the heat pump system further includes: a connecting water pipe 900 and a valve 720. The connecting water pipe 900 is respectively connected to the position of the heating water pipe 700 located at the water outlet side of the indoor heating unit 600 and the position of the heating water pipe 700 located at the water inlet side of the indoor condenser 500; the valve 720 is connected to the return water pipeline 400 and is located at the water outlet side of the position where the connecting water pipe 900 is connected to the heating water pipe 700.

[0069] In the embodiment of the present disclosure, by providing a connecting water pipe 900, the water flowing out of the indoor heating unit 600 of the heating water pipe 700 can flow to the water inlet side of the indoor condenser 500 of the heating water pipe 700 to complete the circulation without passing through the defrosting pipe group 200 of the heat exchanger. In addition, by providing a valve 720 to control the flow of water in the heating water pipe 700 flowing to the defrosting pipe group 200 of the heat exchanger, when the heat exchanger does not need to be defrosted, closing the valve 720 can make the water in the heating water pipe 700 complete the circulation heat exchange without flowing to the outdoor side for heat exchange, thereby reducing the heat loss of the water in the heating water pipe 700 and improving the heating effect of the indoor heating unit 600.

[0070] Optionally, the input end of the connecting water pipe 900 is connected to the output end of the heating water pipe 700, the output end of the connecting water pipe 900 is connected to the input end of the heating water pipe 700, and the connecting position of the input end of the connecting water pipe 900 and the output end of the heating water pipe 700 is located at the water inlet side of the valve 720. In this way, the opening of the valve 720 will not affect the flow of water in the connecting water pipe 900, and when the water in the heating water pipe 700 does not need to flow to the defrost pipe group 200 of the heat exchanger for defrosting, the water in the heating water pipe 700 can be circulated and heat exchanged normally by closing the valve 720.

[0071] Specifically, the valve 720 is installed in the return water pipeline 400 .

[0072] Optionally, the valve 720 is a solenoid valve, so that the opening of the valve 720 can be easily controlled.

[0073] Optionally, the connecting pipe is arranged on the indoor side. In this way, the water flowing in the connecting pipe will not exchange heat with the outdoor side, thereby reducing the heat loss of the water and improving the heating effect of the indoor heating unit 600.

[0074] 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 explicitly 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 exchanger, characterized in that: include: A plurality of refrigerant pipe groups (100) are provided, and the plurality of refrigerant pipe groups (100) are arranged in sequence; A defrost pipe group (200) is arranged between adjacent refrigerant pipe groups (100); The refrigerant pipe group (100) is used to conduct the refrigerant to exchange heat with the incoming air flow, and the defrost pipe group (200) is used to conduct the defrost medium to heat and defrost the refrigerant pipe groups (100) on both sides.

2. The heat exchanger according to claim 1, characterized in that: The plurality of refrigerant pipe groups (100) are arranged in sequence along a flow direction perpendicular to the incoming air flow, and the defrost pipe group (200) and the plurality of refrigerant pipe groups (100) are located in the same plane.

3. The heat exchanger according to claim 1, characterized in that: Each refrigerant pipe group (100) comprises a plurality of heat exchange pipes (110), the plurality of heat exchange pipes (110) are arranged in sequence along a flow direction perpendicular to the inlet air flow, and adjacent heat exchange pipes (110) are connected to form a refrigerant pipe group (100).

4. The heat exchanger according to claim 3, characterized in that: Each defrost pipe group (200) comprises a plurality of circulation pipes (210), the plurality of circulation pipes (210) being arranged in sequence along a flow direction perpendicular to the incoming air flow, and adjacent circulation pipes (210) being connected to form a defrost pipe group (200).

5. The heat exchanger according to claim 4, characterized in that The number of heat exchange pipes (110) in the refrigerant pipe group (100) is greater than the number of circulation pipes (210) in the defrost pipe group (200).

6. The heat exchanger according to claim 5, characterized in that The number of heat exchange pipes (110) in the refrigerant pipe group (100) is twice the number of circulation pipes (210) in the defrost pipe group (200).

7. The heat exchanger according to claim 1, characterized in that The refrigerant pipe group (100) and the defrost pipe group (200) are made of the same material.

8. The heat exchanger according to any one of claims 1 to 7, characterized in that: Also includes: The heat exchange fin (300), the refrigerant pipe group (100) and the defrost pipe group (200) are all arranged through the heat exchange fin (300).

9. The heat exchanger according to any one of claims 1 to 7, characterized in that: The defrost pipe group (200) is connected to the return water pipe (400) on the indoor side.

10. A heat pump system, characterized in that: include: A heat exchanger as claimed in any one of claims 1 to 9.

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