Three-medium heat exchanger and heat pump device

Abstract

The utility model relates to the technical field of heat pumps, and discloses a three-medium heat exchanger and a heat pump device. The three-medium heat exchanger comprises a heat exchange tube set, and the heat exchange tube set comprises a first heat exchange tube; the isolation heat exchange tube is arranged on the outer side of the first heat exchange tube in a sleeving manner; a first concave-convex structure is arranged on the outer surface of the first heat exchange pipe, so that the contact area of the first heat exchange pipe and the isolation heat exchange pipe can be further increased, the heat exchange amount of a medium in the first heat exchange pipe and a medium in the isolation heat exchange pipe is enhanced, and the heat exchange efficiency of the medium in the first heat exchange pipe and the medium in the isolation heat exchange pipe is further improved.

Description

Technical Field

[0001] The present application relates to the field of heat pump technology, and in particular to a three-medium heat exchanger and a heat pump device. Background Art

[0002] Currently, in heat pump devices, a high-efficiency three-medium heat exchanger (medium A, medium B, and air) is required.

[0003] In related technologies, three-medium heat exchangers are often designed based on the mutual heat exchange between mediums A and B, the heat exchange between medium A and air, and the heat exchange between medium B and air.

[0004] During the implementation of the embodiments of the present disclosure, it was found that at least the following problems exist in the related art:

[0005] When the temperature of medium A, the temperature of air, and the temperature of medium B decrease or increase successively, in the related art, medium A exchanges heat with air and then exchanges heat with medium B. When medium A exchanges heat with air, part of the cooling capacity of medium A will be lost, resulting in low heat exchange efficiency between medium A and medium B.

[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 this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this 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 elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a three-medium heat exchanger and a heat pump device to solve the problem in the related art that the heat exchange efficiency of the three-medium heat exchanger is low when the temperature of medium A, the temperature of air, and the temperature of medium B decrease or increase in sequence.

[0009] According to a first aspect of an embodiment of the present utility model, a three-medium heat exchanger is provided, comprising a heat exchange tube group, the heat exchange tube group comprising: a first heat exchange tube; an isolation heat exchange tube, sleeved on the outside of the first heat exchange tube; wherein the outer surface of the first heat exchange tube is provided with a first concave-convex structure.

[0010] Optionally, the first concave-convex structure includes a threaded structure provided on the outer surface of the first heat exchange tube.

[0011] Optionally, the three-medium heat exchanger also includes: a first header connected to the first end of the first heat exchange tube; a second header connected to the first end of the isolation heat exchange tube; a third header connected to the second end of the first heat exchange tube; and a fourth header connected to the second end of the isolation heat exchange tube.

[0012] Optionally, the first header is sleeved on the outside of the second header or the second header is sleeved on the outside of the first header; and / or the third header is sleeved on the outside of the fourth header or the fourth header is sleeved on the outside of the third header.

[0013] Optionally, when the first collecting tube is sleeved on the outside of the second collecting tube, the outer wall surface of the second collecting tube is provided with a second concave-convex structure; when the second collecting tube is sleeved on the outside of the first collecting tube, the outer wall surface of the first collecting tube is provided with a third concave-convex structure; when the third collecting tube is sleeved on the outside of the fourth collecting tube, the outer wall surface of the fourth collecting tube is provided with a fourth concave-convex structure; when the fourth collecting tube is sleeved on the outside of the third collecting tube, the outer wall surface of the third collecting tube is provided with a fifth concave-convex structure.

[0014] Optionally, the first header and the second header share a portion of the tube wall and are located on opposite sides of the shared portion of the tube wall; and / or the third header and the fourth header share a portion of the tube wall and are located on opposite sides of the shared portion of the tube wall.

[0015] Optionally, a sixth concave-convex structure is provided on a portion of the tube wall shared by the first and second headers; and / or a seventh concave-convex structure is provided on a portion of the tube wall shared by the third and fourth headers.

[0016] Optionally, there are multiple heat exchange tube groups, and the multiple heat exchange tube groups are arranged in sequence along the length direction of the first header; the three-medium heat exchanger also includes: a first diverter pipe, which is connected to the first header, the first diverter pipe is provided with a first diverter port, and the medium flows into the first header through the first diverter port; and / or a second diverter pipe, which is connected to the second header, the second diverter pipe is provided with a second diverter port, and the medium flows into the second header through the second diverter port.

[0017] Optionally, there are multiple heat exchange tube groups, and the multiple heat exchange tube groups are arranged in sequence along the length direction of the first collecting pipe; the first collecting pipe is provided with a first inlet, and the medium flows into the first collecting pipe through the first inlet, and as the distance between the first end of the first heat exchange tube and the first inlet increases, the flow area of ​​the first heat exchange tube increases; and / or the second collecting pipe is provided with a second inlet, and the medium flows into the second collecting pipe through the second inlet, and as the distance between the first end of the isolating heat exchange tube and the second inlet increases, the flow area of ​​the isolating heat exchange tube increases.

[0018] According to a second aspect of an embodiment of the present utility model, a heat pump device is provided, comprising: a compressor; a three-medium heat exchanger as described in any one of the above embodiments, wherein the first heat exchange tube is connected to the compressor, and the isolation heat exchange tube is configured to be connected to a water source.

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

[0020] The isolation heat exchange tube is sleeved outside the first heat exchange tube, thus reducing the area on the first heat exchange tube available for heat exchange with the air. The medium temperature in the first heat exchange tube is T1, the air temperature is T2, and the medium temperature in the isolation heat exchange tube is T3. When T1, T2, and T3 increase or decrease sequentially, the heat exchange area between the first heat exchange tube and the air is smaller. Therefore, less medium in the first heat exchange tube exchanges heat with the air, and more medium exchanges heat with the medium in the isolation heat exchange tube. This reduces the cooling loss caused by the medium in the first heat exchange tube first exchanging heat with the air and then with the medium in the isolation heat exchange tube, and improves the efficiency of heat exchange between the medium in the first heat exchange tube and the medium in the isolation heat exchange tube.

[0021] Moreover, the outer surface of the first heat exchange tube is provided with a first concave-convex structure, which can further increase the contact area between the first heat exchange tube and the isolating heat exchange tube, enhance the heat exchange rate between the medium in the first heat exchange tube and the medium in the isolating heat exchange tube, and further improve the heat exchange efficiency between the medium in the first heat exchange tube and the medium in the isolating heat exchange tube.

[0022] 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

[0023] 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,

[0024] Figure 1 This is a structural diagram of a three-medium heat exchanger provided in Example 1 of the present disclosure;

[0025] Figure 2 is a structural schematic diagram of another three-medium heat exchanger provided in the first embodiment of the present disclosure;

[0026] Figure 3 1 is a schematic structural diagram of a first header and a second header provided in Example 1 of the present disclosure;

[0027] Figure 4 is a structural schematic diagram of another three-medium heat exchanger provided in the first embodiment of the present disclosure;

[0028] Figure 5 This is a schematic structural diagram of a heat exchange tube group provided in Example 1 of the present disclosure;

[0029] Figure 6 is a structural schematic diagram of another heat exchange tube group provided in Example 1 of the present disclosure;

[0030] Figure 7 is a structural schematic diagram of another heat exchange tube group provided in Example 1 of the present disclosure;

[0031] Figure 8 is a structural schematic diagram of another heat exchange tube group provided in Example 1 of the present disclosure;

[0032] Figure 9 is a structural schematic diagram of another heat exchange tube group provided in Example 1 of the present disclosure;

[0033] Figure 10 is a structural schematic diagram of another heat exchange tube group provided in Example 1 of the present disclosure;

[0034] Figure 11 is a structural schematic diagram of another three-medium heat exchanger provided in the first embodiment of the present disclosure;

[0035] Figure 12 This is a structural diagram of a three-medium heat exchanger provided in Example 2 of the present disclosure;

[0036] Figure 13 is a structural schematic diagram of another three-medium heat exchanger provided in the second embodiment of the present disclosure;

[0037] Figure 14 is a structural schematic diagram of another three-medium heat exchanger provided in the second embodiment of the present disclosure;

[0038] Figure 15 is a structural schematic diagram of another three-medium heat exchanger provided in the second embodiment of the present disclosure;

[0039] Figure 16 is a cross-sectional view of a heat exchange tube group provided in the second embodiment of the present disclosure;

[0040] Figure 17 This is a structural diagram of a three-medium heat exchanger provided in the third embodiment of the present disclosure;

[0041] Figure 18 is a structural schematic diagram of another three-medium heat exchanger provided in the third embodiment of the present disclosure;

[0042] Figure 19 is a structural schematic diagram of another three-medium heat exchanger provided in the third embodiment of the present disclosure;

[0043] Figure 20is a structural schematic diagram of another three-medium heat exchanger provided in the third embodiment of the present disclosure;

[0044] Figure 21 is a structural schematic diagram of another three-medium heat exchanger provided in the third embodiment of the present disclosure;

[0045] Figure 22 is a structural schematic diagram of another three-medium heat exchanger provided in the third embodiment of the present disclosure;

[0046] Figure 23 is a structural schematic diagram of another three-medium heat exchanger provided in the third embodiment of the present disclosure;

[0047] Figure 24 This is a schematic diagram of the structure of a portion of a first heat exchange tube provided in the third embodiment of the present disclosure;

[0048] Figure 25 is a schematic structural diagram of a portion of another first heat exchange tube provided in the third embodiment of the present disclosure;

[0049] Figure 26 This is a schematic diagram of the structure of a portion of a heat exchange tube group provided in Example 3 of the present disclosure;

[0050] Figure 27 This is a partial structural diagram of another heat exchange tube group provided in the third embodiment of the present disclosure;

[0051] Figure 28 This is a schematic diagram of the structure of a portion of a heat exchange tube group provided in Example 3 of the present disclosure;

[0052] Figure 29 This is a schematic diagram of the structure of a portion of a heat exchange tube group provided in Example 3 of the present disclosure;

[0053] Figure 30 This is a schematic structural diagram of a heat exchange tube group provided in the fourth embodiment of the present disclosure;

[0054] Figure 31 is a structural schematic diagram of another heat exchange tube group provided in the fourth embodiment of the present disclosure;

[0055] Figure 32 is a structural schematic diagram of another heat exchange tube group provided in the fourth embodiment of the present disclosure;

[0056] Figure 33 This is a structural diagram of a three-medium heat exchanger provided in the fourth embodiment of the present disclosure;

[0057] Figure 34 is a structural schematic diagram of another three-medium heat exchanger provided in the fourth embodiment of the present disclosure;

[0058] Figure 35is a schematic diagram of a cooling mode of a heat pump system provided by an embodiment of the present disclosure;

[0059] Figure 36 is a schematic diagram of a heating mode of a heat pump system provided by an embodiment of the present disclosure;

[0060] Figure 37 is a schematic diagram of a heat pump system for domestic hot water supply provided by an embodiment of the present disclosure;

[0061] Figure 38 is a schematic diagram of a heat pump system in a non-heat recovery mode provided by an embodiment of the present disclosure;

[0062] Figure 39 is a schematic diagram of a heat recovery mode of a heat pump system provided by an embodiment of the present disclosure;

[0063] Figure 40 It is a schematic diagram of a partial heat recovery mode of a heat pump system provided in an embodiment of the present disclosure.

[0064] Reference numerals:

[0065] 305, heat exchange tube group; 3051, first heat exchange tube; 3054, second heat exchange tube; 3057, third heat exchange tube; 3060, isolation heat exchange tube; 3063, first fin; 3068, first header; 3071, second header; 3072, second inlet; 3073, second medium outlet; 3074, third header; 3075, fourth header; 3076, concave-convex structure; 3077, first separator; 3078, second separator; 3079, fourth heat exchange Tube; 3080, second fin; 3081, connecting heat exchange tube; 3082, first baffle; 3083, first sub-region; 3084, second sub-region; 3085, second baffle; 3086, third sub-region; 3087, fourth sub-region; 3091, second diverter tube; 3092, second diverter port; 3093, second diverter inlet; 3094, first bend; 3095, first bend section; 3096, second bend section; 3097, medium inlet and outlet; 3098, first micro Channel; 3099, second microchannel; 3100, connecting port; 3101, first concave-convex structure; 3102, third fin; 3103, end cover; 3104, second medium inlet; 10, compressor; 20, first reversing member; 201, first interface; 202, second interface; 203, third interface; 204, fourth interface; 30, three-medium heat exchanger; 303, first water inlet pipe; 304, first water outlet pipe; 40, load-side heat exchanger; 402, first connecting pipe of load-side heat exchanger Interface; 401, second connection port of the load-side heat exchanger; 403, second water inlet pipe; 404, second water outlet pipe; 50, first throttling element; 60, second throttling element; 70, branch pipe; 702, first connecting pipe; 703, second connecting pipe; 104, filter; 105, second switch; 106, third switch; 107, auxiliary heating device; 108, expansion tank; 109, water pump; 110, drain valve; 112, third throttling element; 3105, first fan. DETAILED DESCRIPTION

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] Unless otherwise stated, the term "plurality" means two or more.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] The three-medium heat exchanger of the present application is described below with reference to the accompanying drawings. Figure 1-34 The horizontal or vertical arrows indicate the flow direction of the medium, the inclined straight arrows indicate the flow direction of the air, and the curved arrows indicate the flow of heat. Figures 35 to 40The solid arrows indicate the flow direction of the refrigerant, and the hollow arrows indicate the flow direction of the air driven by the first fan.

[0075] Example 1:

[0076] Combine Figure 1-11 As shown, the present embodiment provides a three-medium heat exchanger. The three-medium heat exchanger includes a heat exchange tube group 305, which includes a first heat exchange tube 3051, an isolation heat exchange tube, and a first fin 3063. The isolation heat exchange tube includes a second heat exchange tube 3054 and a third heat exchange tube 3057.

[0077] The second heat exchange tube 3054 and the third heat exchange tube 3057 are arranged outside the first heat exchange tube 3051 and are arranged in sequence along the circumference of the first heat exchange tube 3051. Figure 1 As shown, the second heat exchange tube 3054 and the third heat exchange tube 3057 are arranged on two opposite sides of the first heat exchange tube 3051.

[0078] The second heat exchange tube 3054 and the third heat exchange tube 3057 are both fitted with the first heat exchange tube 3051, which can reduce the area of ​​the first heat exchange tube 3051 exposed to the air. The area on the first heat exchange tube 3051 that can exchange heat with the air is reduced, thereby reducing the heat exchange between the first heat exchange tube 3051 and the air, so that the medium in the first heat exchange tube 3051 can exchange heat with the second heat exchange tube 3054 and the third heat exchange tube 3057 more.

[0079] The first fin 3063 is arranged on the surface of the second heat exchange tube 3054 and / or the third heat exchange tube 3057 that is at least partially not in contact with the first heat exchange tube 3051. Due to the arrangement of the first fin 3063, the heat exchange capacity between the second heat exchange tube 3054 and / or the third heat exchange tube 3057 provided with the first fin 3063 and the air is enhanced.

[0080] A first fin 3063 is provided on at least a portion of the surface of the second heat exchange tube 3054 that is not in contact with the first heat exchange tube 3051, thereby enhancing the heat exchange capacity between the second heat exchange tube 3054 and the air; and / or, a first fin 3063 is provided on at least a portion of the surface of the third heat exchange tube 3057 that is not in contact with the first heat exchange tube 3051, thereby enhancing the heat exchange capacity between the third heat exchange tube 3057 and the air.

[0081] The temperature of the medium in the first heat exchange tube 3051 is T1, the temperature of the air is T2, and the temperature of the medium in the second heat exchange tube 3054 and the third heat exchange tube 3057 is T3. When T1, T2, and T3 increase or decrease sequentially, since the heat exchange area between the first heat exchange tube 3051 and the air is smaller, less medium in the first heat exchange tube 3051 exchanges heat with the air, and more medium exchanges heat with the medium in the second heat exchange tube 3054 and the third heat exchange tube 3057, thereby reducing the cooling loss caused by the medium in the first heat exchange tube 3051 first exchanging heat with the air and then exchanging heat with the medium in the second heat exchange tube 3054 and the third heat exchange tube 3057, and improving the heat exchange efficiency between the medium in the first heat exchange tube 3051 and the medium in the second heat exchange tube 3054 and the third heat exchange tube 3057.

[0082] Optionally, there are multiple heat exchange tube groups 305, which are arranged in sequence. The multiple heat exchange tube groups 305 include a first heat exchange tube group 3051 and a second heat exchange tube group 3065.

[0083] The second heat exchange tube group 3065 is arranged adjacent to the first heat exchange tube 3051 group 305, the first heat exchange tube 3051 of the first heat exchange tube 3051 group 305 is connected to the first heat exchange tube 3051 of the second heat exchange tube group 3065, the second heat exchange tube 3054 of the first heat exchange tube 3051 group 305 is connected to the second heat exchange tube 3054 of the second heat exchange tube group 3065, and the third heat exchange tube 3057 of the first heat exchange tube 3051 group 305 is connected to the third heat exchange tube 3057 of the second heat exchange tube group 3065; wherein, the first fin 3063 on the first heat exchange tube 3051 group 305 is connected to the second heat exchange tube group 3065.

[0084] The first heat exchange tubes 3051 of the plurality of heat exchange tube groups 305 are all connected, the second heat exchange tubes 3054 are all connected, and the third heat exchange tubes 3057 are all connected.

[0085] The first fin 3063 is arranged between the first heat exchange tube 3051 group 305 and the second heat exchange tube group 3065, one end of the first fin 3063 is in contact with the load side heat exchanger and / or the third heat exchanger of the first heat exchange tube 3051 group 305, and the other end of the first fin 3063 is in contact with the second heat exchange tube group 3065. Therefore, when the positions of the first heat exchange tube 3051 group 305 and the second heat exchange tube group 3065 are determined, this arrangement can increase the area of ​​the first fin 3063 and increase the heat exchange area between the second heat exchange tube 3054 and / or the third heat exchange tube 3057 provided with the first fin 3063 and the air, thereby improving the heat exchange efficiency between the second heat exchange tube 3054 and / or the third heat exchange tube 3057 provided with the first fin 3063 and the air.

[0086] like Figure 1As shown, there are four heat exchange tube groups 305, namely, first, second, and fourth heat exchange tube groups 3067, which are arranged sequentially. A first fin 3063 is provided on the second heat exchange tube 3054 of the first heat exchange tube group 3064, and a first fin 3063 is provided on the third heat exchange tube 3057 of the first heat exchange tube group 3064. The first fin provided on the third heat exchange tube 3057 is aligned with the second heat exchange tube 3054 of the second heat exchange tube group 3065. The first fin 3063 provided on the third heat exchange tube 3057 of the second heat exchange tube group 3065 is aligned with the second heat exchange tube 3054 of the second heat exchange tube group 3066. The first fin 3063 provided on the third heat exchange tube 3057 of the second heat exchange tube group 3066 is aligned with the second heat exchange tube 3054 of the fourth heat exchange tube group 3067. The third heat exchange tube 3057 of the fourth heat exchange tube group 3067 is also aligned with the first fin 3063.

[0087] The first heat exchange tube 3051, the second heat exchange tube 3054 and the third heat exchange tube 3057 are connected to each other in a split structure. For example, the second heat exchange tube 3054 and the third heat exchange tube 3057 are welded to the outside of the first heat exchange tube 3051. Figure 9 As shown, point M is a welding point to reduce the contact thermal resistance between the second heat exchange tube 3054 and the first heat exchange tube 3051 and between the third heat exchange tube 3057 and the first heat exchange tube 3051 .

[0088] like Figure 10 As shown, the first heat exchange tube 3051, the second heat exchange tube 3054 and the third heat exchange tube 3057 can also be an integrated structure, and three groups of flow channels are designed inside the integrated structure as the inner wall surfaces of the first heat exchange tube 3051, the second heat exchange tube 3054 and the third heat exchange tube 3057 respectively.

[0089] No fins are provided on the outside of the first heat exchange tube 3051 , so as to reduce the heat exchange between the first heat exchange tube 3051 and the air.

[0090] The shapes of the first heat exchange tube 3051, the second heat exchange tube 3054 and the third heat exchange tube 3057 are not limited. For example, the first heat exchange tube 3051 is a rectangular parallelepiped, the second heat exchange tube 3054 and the third heat exchange tube 3057 are also rectangular parallelepiped, and the second heat exchange tube 3054 and the third heat exchange tube 3057 are attached to the plane surrounded by the long side and the wide side of the first heat exchange tube 3051 (such as Figure 9 As shown), instead of being set on the plane surrounded by the wide side and the height side, the plane surrounded by the wide side and the height side is in contact with the air, and the size of the plane is smaller than the size of the plane surrounded by the long side and the width side, thereby reducing the heat exchange area between the first heat exchange tube 3051 and the air.

[0091] Due to the different thermal properties of the media flowing through the first heat exchange tube 3051, the second heat exchange tube 3054, and the third heat exchange tube 3057, the cross-sectional hydraulic diameter, wetted perimeter, and other characteristic dimensions of the flow channels of the first heat exchange tube 3051, the second heat exchange tube 3054, and the third heat exchange tube 3057 are different. For example, a medium with high flow viscosity has a larger flow resistance loss, so the cross-sectional hydraulic diameter of its flow channel should be larger than that of a medium with low flow viscosity. Figure 5 and Figure 6 shown.

[0092] Alternatively, as Figure 1 As shown, the three-medium heat exchanger further includes a first header 3068 , a second header 3071 , a third header 3074 and a fourth header 3075 .

[0093] The first collecting pipe 3068 is connected to the first end portion 3052 of the first heat exchange tube; the second collecting pipe 3071 is connected to the first end portion 3055 of the second heat exchange tube and the first end portion 3058 of the third heat exchange tube; the third collecting pipe 3074 is connected to the second end portion 3053 of the first heat exchange tube; the fourth collecting pipe 3075 is connected to the second end portion 3056 of the second heat exchange tube and the second end portion 3059 of the third heat exchange tube.

[0094] The first end 3052 of the first heat exchange tube is connected to the first header 3068, and the second end 3053 of the first heat exchange tube is connected to the third header 3074. The first header 3068 and the third header 3074 are respectively disposed at opposite ends of the first heat exchange tube 3051. The medium flows into the first heat exchange tube 3051 through the first header 3068 and then into the third header 3074. Alternatively, the medium flows into the first heat exchange tube 3051 through the third header 3074 and then into the first header 3068.

[0095] The first end 3055 of the second heat exchange tube and the first end 3058 of the third heat exchange tube are both connected to a second header 3071. The second end 3056 of the second heat exchange tube and the second end 3059 of the third heat exchange tube are both connected to a fourth header 3075. The second header 3071 and the fourth header 3075 are respectively disposed at opposite ends of the second heat exchange tube 3054 and the third heat exchange tube 3057. The medium flows through the second header 3071 into the second heat exchange tube 3054 and the third heat exchange tube 3057 and then into the fourth header 3075. Alternatively, the medium flows through the fourth header 3075 into the second heat exchange tube 3054 and the third heat exchange tube 3057 and then into the second header 3071.

[0096] Optionally, the first manifold 3068 is sleeved on the outside of the second manifold 3071 or as shown in FIG. Figure 1As shown, the second manifold 3071 is sleeved on the outside of the first manifold 3068, and the third manifold 3074 is sleeved on the outside of the fourth manifold 3075. Figure 1 The fourth collecting pipe 3075 is shown as being sleeved on the outside of the third collecting pipe 3074 to form an inner and outer pipe structure. The diameter of the inner pipe is smaller than that of the outer pipe, so that the outer pipe can be sleeved outside the inner pipe.

[0097] When the first manifold 3068 is configured as an outer tube and the second manifold 3071 is configured as an inner tube, the first manifold 3068 is sheathed on the outside of the second manifold 3071. Alternatively, the second manifold 3071 can be configured as an outer tube, the first manifold 3068 as an inner tube, and the second manifold 3071 sheathed on the outside of the first manifold 3068. In this way, the first manifold 3068 and the second manifold 3071 can share the wall of the inner tube, thereby enhancing heat exchange between the medium in the first manifold 3068 and the medium in the second manifold 3071 and improving the heat exchange capacity of the three-medium heat exchanger.

[0098] And / or the third header 3074 is configured as an outer tube, the fourth header 3075 is configured as an inner tube, and the third header 3074 is sleeved on the outside of the fourth header 3075. Alternatively, the fourth header 3075 is configured as an outer tube, the third header 3074 is configured as an inner tube, and the fourth header 3075 is sleeved on the outside of the third header 3074. In this way, the third header 3074 and the fourth header 3075 can share the tube wall of the inner tube, thereby enhancing the heat exchange between the medium in the third header 3074 and the medium in the fourth header 3075, thereby enhancing the heat exchange capacity of the three-medium heat exchanger.

[0099] Alternatively, as Figure 3As shown, when the first manifold 3068 is sleeved on the outside of the second manifold 3071, the outer wall surface of the second manifold 3071 is provided with a concave-convex structure 3076 to increase the surface area of ​​the outer wall surface of the second manifold 3071, thereby increasing the heat exchange area between the medium in the first manifold 3068 and the medium in the second manifold 3071; when the second manifold 3071 is sleeved on the outside of the first manifold 3068, the outer wall surface of the first manifold 3068 is provided with a concave-convex structure 3076 to increase the surface area of ​​the outer wall surface of the first manifold 3068, thereby increasing the heat exchange area between the medium in the first manifold 3068 and the medium in the second manifold 3071. area; when the third collecting pipe 3074 is sleeved on the outside of the fourth collecting pipe 3075, the outer wall surface of the fourth collecting pipe 3075 is provided with a concave-convex structure 3076 to increase the surface area of ​​the outer wall surface of the fourth collecting pipe 3075, thereby increasing the heat exchange area between the medium in the third collecting pipe 3074 and the medium in the fourth collecting pipe 3075; when the fourth collecting pipe 3075 is sleeved on the outside of the third collecting pipe 3074, the outer wall surface of the third collecting pipe 3074 is provided with a concave-convex structure 3076 to increase the surface area of ​​the outer wall surface of the third collecting pipe 3074, thereby increasing the heat exchange area between the medium in the third collecting pipe 3074 and the medium in the fourth collecting pipe 3075.

[0100] The concave-convex structure 3076 can be a threaded structure, and the axial direction of the thread is consistent with the length direction of the first header 3068, the second header 3071, the third header 3074 or the fourth header 3075 where it is located, further improving the heat exchange effect of the three-medium heat exchanger.

[0101] Alternatively, as Figure 1 As shown, the three-medium heat exchanger further includes a fourth heat exchange tube 3079 and a second fin 3080. The first end and the second end of the fourth heat exchange tube 3079 are respectively connected to the second header 3071 and the fourth header 3075; the second fin 3080 is provided on the outer surface of the fourth heat exchange tube 3079.

[0102] The first end of fourth heat exchange tube 3079 is connected to second header 3071, and the second end of fourth heat exchange tube 3079 is connected to fourth header 3075. The medium enters fourth heat exchange tube 3079 from second header 3071 and flows into fourth header 3075 through fourth heat exchange tube 3079. Alternatively, the medium enters fourth heat exchange tube 3079 from fourth header 3075 and flows into second header 3071 through fourth heat exchange tube 3079.

[0103] The outer surface of the fourth heat exchange tube 3079 is provided with a second fin 3080 , and the second fin 3080 is filled with air, thereby enhancing the heat exchange efficiency between the fourth heat exchange tube 3079 and the air.

[0104] The same medium flows through the fourth heat exchange tube 3079, the second heat exchange tube 3054, and the third heat exchange tube 3057. This medium exchanges a large amount of heat with the air in the fourth heat exchange tube 3079 via the second fins 3080. In addition to exchanging heat with the air in the second and third heat exchange tubes 3054 and 3057, this medium also exchanges heat with the medium in the first heat exchange tube 3051. Therefore, when the medium temperature is the same, the heat exchange effect in the fourth heat exchange tube 3079 differs from that in the second and third heat exchange tubes 3054 and 3057. Therefore, whether the medium flows through the fourth heat exchange tube 3079 and the order in which it flows through the fourth heat exchange tube 3079 and the heat exchange tube group 305 can be determined based on the medium temperature, thereby ensuring that the three-medium heat exchanger achieves optimal heat exchange efficiency under different circumstances.

[0105] Alternatively, as Figure 1 As shown, the second header 3071 is provided with a second medium outlet 3073, and the fourth header 3075 is provided with a second medium inlet 3104. The three-medium heat exchanger further includes a connecting heat exchange pipe 3081, a first partition plate 3082 and a second partition plate 3085.

[0106] The connecting heat exchange pipe 3081 is provided between the fourth heat exchange pipe 3079 and the heat exchange pipe group 305. The first end and the second end of the connecting heat exchange pipe 3081 are respectively connected to the second header 3071 and the fourth header 3075. The first partition plate 3082 is provided in the second header 3071 to separate the second header 3071 into a first sub-region 3083 and a second sub-region 3084. The first sub-region 3083 is connected to the first end of the fourth heat exchange pipe 3079, and the second sub-region 3084 is connected to the first sub-region 3083. Second partition plate 3085 is connected to the first end of second heat exchange tube 3054, third heat exchange tube 3057, and connecting heat exchange tube 3081. A second partition plate 3085 is disposed within fourth header 3075, dividing fourth header 3075 into a third sub-area 3086 and a fourth sub-area 3087. Third sub-area 3086 is connected to the second end of fourth heat exchange tube 3079 and connecting heat exchange tube 3081, while fourth sub-area 3087 is connected to the second heat exchange tube 3054 and the second end of third heat exchange tube 3059. The medium flows through second medium outlet 3073 into at least one of fourth heat exchange tube 3079, connecting heat exchange tube 3081, and heat exchange tube group 305, and then flows out of fourth header 3075.

[0107] The first and second ends of fourth heat exchange tube 3079 are connected to first sub-region 3083 and third sub-region 3086, respectively. The first and second ends of communication heat exchange tube 3081 are connected to second sub-region 3084 and third sub-region 3086, respectively. The first ends of second heat exchange tube 3054 and third heat exchange tube 3058 are both connected to second sub-region 3084, and the first ends of second heat exchange tube 3054 and third heat exchange tube 3058 are both connected to fourth sub-region 3087.

[0108] The first heat exchange tubes 3051 of the plurality of heat exchange tube groups 305 are sequentially arranged along the length direction of the first header 3068 , and the second heat exchange tubes 3054 of the plurality of heat exchange tube groups 305 are sequentially arranged along the length direction of the second header 3071 .

[0109] The first medium flows in the first heat exchange tube 3051 , and the second medium flows in the fourth heat exchange tube 3079 , the connecting heat exchange tube 3081 , the second heat exchange tube 3054 and the third heat exchange tube 3057 .

[0110] When the temperature difference between the second medium and the air in the second header is greater than the temperature difference between the first medium in the first header and the second medium in the second header, the temperature difference between the second medium and the air is greater, and the heat exchange effect between the two is better. Therefore, the second medium flowing out of the second medium outlet 3073 first flows into the fourth heat exchange tube 3079, then flows into the connecting heat exchange tube 3081, exchanges heat with the air in the fourth heat exchange tube 3079 and the connecting heat exchange tube 3081, and then flows into the second heat exchange tube 3054 and the third heat exchange tube 3057 of the heat exchange tube group 305. As the second medium exchanges heat with the air in the fourth heat exchange tube 3079 and the connecting heat exchange tube 3081, the temperature difference between the second medium and the air decreases. Because the first medium does not exchange heat with the air or the amount of heat exchanged is small, the temperature difference between the first medium and the second medium in the second and third heat exchange tubes 3054 and 3057 is greater than the temperature difference between the second medium and the air in the second and third heat exchange tubes 3054 and 3057. Consequently, after the second medium enters the second and third heat exchange tubes 3054 and 3057, it can effectively exchange heat with the first medium, resulting in a good heat exchange effect. After passing through the second and third heat exchange tubes 3054 and 3057, the second medium flows into the fourth manifold 3075 through the second medium inlet 3104. The above temperature differences are absolute values.

[0111] Optionally, the three-medium heat exchanger further includes a control switch, which is used to control the on / off of the fourth heat exchange tube 3079; and is configured such that: when the difference between the temperature of the second medium in the second header 3071 and the temperature of the air is greater than the difference between the temperature of the second medium in the second header 3071 and the temperature of the first medium in the first header 3068, the control switch is turned on to make the fourth heat exchange tube 3079 conductive.

[0112] When the temperature difference between the second medium in second manifold 3071 and the air is greater than the temperature difference between the second medium in second manifold 3071 and the first medium in first manifold 3068, this indicates a larger temperature difference between the second medium and the air, and the heat exchange effect between the second medium and the air is superior to that between the second medium and the first medium. Therefore, when the control switch is turned on, the second medium in second manifold 3071 flows through second medium outlet 3073 into fourth heat exchange tube 3079. After exchanging heat with the air in fourth heat exchange tube 3079, it enters connecting heat exchange tube 3081. After exchanging heat with the air in connecting heat exchange tube 3081, it enters second heat exchange tube 3054 and third heat exchange tube 3057 of the plurality of heat exchange tube groups 305. Because the second medium first flows through fourth heat exchange tube 3079 and connecting heat exchange tube 3081, it undergoes sufficient heat exchange with the air, thereby improving the heat exchange efficiency of the three-medium heat exchanger.

[0113] When the difference between the temperature of the second medium in the second header 3071 and the temperature of the air is less than or equal to the difference between the temperature of the second medium in the second header 3071 and the temperature of the first medium in the first header 3068, the control switch is closed, the fourth heat exchange tube 3079 is disconnected, and the second medium does not pass through the fourth heat exchange tube 3079. The difference is an absolute value.

[0114] For example, the temperature of the first medium in first manifold 3068 is Ta, the temperature of the second medium in second manifold 3071 is Tb, and the temperature of the air is Tc. When the temperature difference between the second medium and the air is large, and the temperature difference between the second medium and the first medium is small, that is, Tb-Tc ≥ m and Ta-Tb < m, the temperature difference between the second medium and the air is large, the heat exchange temperature gradient is large, and the heat exchange is strong, so the control switch is open. When the temperature difference between the second medium and the air is small, and the temperature difference between the second medium and the first medium is large, that is, Tb-Tc < m, the temperature difference between the second medium and the air is small, the heat exchange temperature gradient is small, and the heat exchange is weakened. In this case, the first medium is introduced, and Ta-Tb ≥ m. Therefore, the temperature difference between Ta and Tb is large, which can enhance the heat exchange of the second medium.

[0115] When the first medium is water, the second medium is refrigerant, and the third medium is air, 2°C≤m≤5°C.

[0116] The three-medium heat exchanger is used in a heat pump system. The control switch can be set in the refrigerant circulation flow path of the heat pump system, or in the fourth heat exchange pipe 3079 or in the second header 3071 .

[0117] like Figure 1As shown, the second fin 3080 is in contact with the surface of the connecting heat exchange tube 3081 facing the second fin 3080, and the first fin 3063 on the heat exchange tube group 305 is in contact with the surface of the connecting heat exchange tube 3081 facing the heat exchange tube group 305, so as to enhance the heat exchange capacity between the connecting heat exchange tube 3081 and the air.

[0118] Optionally, the three-medium heat exchanger further includes a first diversion pipe, which is connected to the first header 3068 and has a first diversion port. The medium flows into the first header 3068 through the first diversion port.

[0119] The first diverter tube is provided with a first diverter port, and the first header 3068 is provided with a first inlet port. The medium flows through the first diverter port and the first inlet port, respectively, and then into the first header 3068. The first diverter tube acts as a buffer chamber. After passing through the first diverter tube, the medium enters the first header 3068. The medium is gathered and buffered in the first diverter tube, allowing the medium to flow more evenly into the first heat exchange tubes 3051 of each heat exchange tube group 305. There can be one or more first diverter ports. When there are multiple first diverter ports, the number of first diverter ports, the number of first inlet ports, and the number of heat exchange tube groups 305 are equal and correspond one to one. The first diverter tube is also provided with a first diverter inlet. There is only one first diverter inlet. As the distance from the first diverter inlet increases, the flow area of ​​the first diverter inlet increases, and the flow area of ​​the first inlet increases. For example, if the first diverter inlet is a circular inlet, as the distance from the first diverter inlet increases, the inner diameter of the first diverter inlet increases, and the inner diameter of the first inlet increases, so that the amount of medium flowing into the first heat exchange tubes 3051 in each heat exchange tube group 305 is roughly balanced. The first diverter inlet is located in the middle of the length of the first diverter tube to further improve the uniformity of the medium flowing through the first diverter tube into the first heat exchange tubes 3051 in each heat exchange tube group 305.

[0120] Alternatively, as Figure 2 As shown, the three-medium heat exchanger further includes a second diversion pipe 3091 , which is connected to the second header 3071 . The second diversion pipe 3091 is provided with a second diversion port 3092 , and the medium flows into the second header 3071 through the second diversion port 3092 .

[0121] The second diverter pipe 3091 is provided with a second diverter port 3092, and the second header pipe 3071 is provided with a second inlet port 3072. The medium flows through the second diverter port 3092 and the second inlet port 3072 in sequence and then flows into the second header pipe 3071. The second diverter pipe 3091 acts as a buffer chamber. After passing through the second diverter pipe 3091, the medium enters the second header pipe 3071. The medium is gathered and buffered in the second diverter pipe 3091, thereby allowing the medium to flow more evenly into the second heat exchange tubes 3054 and the third heat exchange tubes 3057 of each heat exchange tube group 305. There can be one or more second diverter ports 3092. When there are multiple second diverter ports 3092, the number of second diverter ports 3092, the number of second inlet ports 3072, and the number of heat exchange tube groups 305 are equal and correspond one to one. The second diverter tube 3091 is also provided with a second diverter inlet 3093. There is only one second diverter inlet 3093. As the distance from the second diverter inlet 3093 increases, the flow area of ​​the second diverter inlet 3092 increases, and the flow area of ​​the second inlet inlet 3072 also increases. For example, if the second diverter inlet 3092 is a circular inlet, as the distance from the second diverter inlet 3093 increases, the inner diameter of the second diverter inlet 3092 and the inner diameter of the second inlet inlet 3072 also increase, thereby ensuring a roughly balanced amount of medium flowing into the second heat exchange tubes 3054 and third heat exchange tubes 3057 in each heat exchange tube group 305. The second diverter inlet 3093 is located in the middle of the length of the second diverter tube 3091 to further improve the uniformity of the medium flowing through the second diverter tube 3091 into the second heat exchange tubes 3054 and third heat exchange tubes 3057 in each heat exchange tube group 305.

[0122] Optionally, the first manifold 3068 has a first inlet port, through which the medium flows into the first manifold 3068 and then into the third manifold 3074 through the first heat exchange tube 3051. As the distance between the first end 3052 of the first heat exchange tube and the first inlet port increases, the flow area of ​​the first heat exchange tube 3051 increases.

[0123] Among the first heat exchange tubes 3051 of the multiple heat exchange tube groups 305, the flow area of ​​the first heat exchange tube 3051 that is farther away from the first inlet is larger, so that more medium can still flow into the first heat exchange tube 3051 that is farther away from the first inlet, so that the amount of medium flowing into the first heat exchange tube 3051 of each heat exchange tube group 305 is uniform.

[0124] The first heat exchange tube 3051 is a microchannel heat exchange tube having multiple microchannels. The flow area of ​​the first heat exchange tube 3051 is the sum of the flow areas of the multiple microchannels. The flow area of ​​the first heat exchange tube 3051 can be increased by increasing the flow area of ​​a single microchannel and / or increasing the number of microchannels.

[0125] Alternatively, as Figure 2As shown, the second header 3071 is provided with a second inlet 3072, and the medium flows into the second header 3071 through the second inlet 3072, and flows into the fourth header 3075 through the second heat exchange tube 3054 and the third heat exchange tube 3057. Figure 11 As shown, as the distance between the first end 3055 of the second heat exchange tube and the second inlet 3072 increases, the flow area of ​​the second heat exchange tube 3054 increases. As the distance between the first end 3058 of the third heat exchange tube and the second inlet 3072 increases, the flow area of ​​the third heat exchange tube 3057 increases.

[0126] Among the second heat exchange tubes 3054 of the multiple heat exchange tube groups 305, the flow area of ​​the second heat exchange tube 3054 that is farther away from the second inlet 3072 is larger, so that more medium can still flow into the second heat exchange tube 3054 that is farther away from the second inlet 3072, so that the amount of medium flowing into the second heat exchange tube 3054 of each heat exchange tube group 305 is uniform.

[0127] Among the third heat exchange tubes 3057 of the multiple heat exchange tube groups 305, the flow area of ​​the third heat exchange tube 3057 that is farther away from the second inlet 3072 is larger, so that more medium can still flow into the third heat exchange tube 3057 that is farther away from the second inlet 3072, so that the amount of medium flowing into the third heat exchange tube 3057 of each heat exchange tube group 305 is uniform.

[0128] Second heat exchange tube 3054 is a microchannel heat exchange tube having multiple microchannels. The flow area of ​​second heat exchange tube 3054 is the sum of the flow areas of the multiple microchannels. Third heat exchange tube 3057 is a microchannel heat exchange tube having multiple microchannels. The flow area of ​​third heat exchange tube 3057 is the sum of the flow areas of the multiple microchannels. The flow area of ​​second heat exchange tube 3054 and / or third heat exchange tube 3057 can be increased by increasing the flow area of ​​a single microchannel and / or increasing the number of microchannels.

[0129] The first heat exchange tube 3051, the second heat exchange tube 3054 and the third heat exchange tube 3057 are separately connected together, or use an integrated processing or folding processing process to reduce the wall thickness of the first heat exchange tube 3051, the second heat exchange tube 3054 and the third heat exchange tube 3057, reduce the contact thermal resistance, and improve the heat exchange efficiency.

[0130] When the second collecting pipe 3071 is sleeved on the outside of the first collecting pipe 3068, in order to facilitate the connection between the first heat exchange tube 3051 and the first collecting pipe 3068, the first end portion 3052 of the first heat exchange tube protrudes from the second heat exchange tube 3054 and the first end portion 3058 of the third heat exchange tube, and the first end portion 3052 of the first heat exchange tube partially extends into the second collecting pipe 3071; when the first collecting pipe 3068 is sleeved on the outside of the second collecting pipe 3071, in order to facilitate the connection between the second heat exchange tube 3054 and the third heat exchange tube 3057 and the second collecting pipe 3071, the first end portions 3058 of the second heat exchange tube 3054 and the third heat exchange tube protrude from the first end portion 3052 of the first heat exchange tube, and the first end portions 3058 of the second heat exchange tube 3054 and the third heat exchange tube partially extend into the first collecting pipe 3068.

[0131] The first to fourth headers 3068 to 3075 may be placed horizontally (eg Figure 1 As shown), vertical placement (as Figure 4 as shown) or tilted.

[0132] Example 2:

[0133] The difference from the first embodiment is that Figures 12 to 16 As shown, the first collecting pipe 3068 and the second collecting pipe 3071 share a portion of the pipe wall and are respectively located on two opposite sides of the shared portion of the pipe wall; and / or the third collecting pipe 3074 and the fourth collecting pipe 3075 share a portion of the pipe wall and are respectively located on two opposite sides of the shared portion of the pipe wall.

[0134] A first partition 3077 is provided in one tube body, extending along the length of the tube body and dividing the tube body into a first header 3068 and a second header 3071. The first and second headers 3068 and 3071 share a portion of the sidewall forming the first partition 3077. Alternatively, a second partition 3078 is provided in another tube body, dividing the tube body into a third and fourth headers 3074 and 3075. The second partition 3078 shares a portion of the sidewall forming the second partition 3078.

[0135] The medium in the first header 3068 and the medium in the second header 3071 can exchange heat through the first partition 3077, thereby enhancing the heat exchange efficiency of the three-medium heat exchanger. The medium in the third header 3074 and the medium in the fourth header 3075 can exchange heat through the second partition 3078, thereby enhancing the heat exchange efficiency of the three-medium heat exchanger.

[0136] Example 3:

[0137] In Example 1, taking the example of a case where the first header 3068 is disposed inside the second header 3071, the first heat exchange tube 3051 extends into the second header 3071 to communicate with the first header 3068, and the second heat exchange tube 3054 and the third heat exchange tube 3057 are both connected to the second header 3071. As a result, the first heat exchange tube 3051 obstructs the flow of the medium in the second header 3071, affecting the flow of the medium in the second header 3071 into the second heat exchange tube 3054 and the third heat exchange tube 3057.

[0138] Therefore, different from the first embodiment, Figures 17 to 29 As shown, the first heat exchange tube 3051 is located outside the second header 3071 and outside the fourth header 3075 , and the second heat exchange tube 3054 and the third heat exchange tube 3057 are both located outside the first header 3068 and outside the third header 3074 .

[0139] The first manifold 3068 and the third manifold 3074 are referred to as first manifolds, and the second manifold 3071 and the fourth manifold 3075 are referred to as second manifolds. When the first manifold refers to the first manifold 3068, the second manifold refers to the second manifold 3071. When the first manifold refers to the third manifold 3074, the second manifold refers to the fourth manifold 3075.

[0140] The first manifold is connected to the end of the first heat exchange tube 3051. When the first manifold is the first collecting tube 3068, the end is the first end, and when the first manifold is the third collecting tube 3074, the end is the second end; the second manifold is connected to the ends of both the second heat exchange tube 3054 and the third heat exchange tube 3057. When the second manifold is the second collecting tube 3071, the end is the first end, and when the second manifold is the fourth collecting tube 3075, the end is the second end; wherein, the first heat exchange tube 3051 is located outside the second manifold, and the second heat exchange tube 3054 and the third heat exchange tube 3057 are both located outside the first manifold.

[0141] like Figures 20 to 23 As shown, the first heat exchange tube 3051 is completely located outside the second manifold, and the second heat exchange tube 3054 and the third heat exchange tube 3057 are both completely located outside the first manifold. In this way, the first heat exchange tube 3051 has no part extending into the second manifold, and the second heat exchange tube 3054 and the third heat exchange tube 3057 have no part extending into the first manifold. In this way, the first heat exchange tube 3051 does not block the second manifold, and does not affect the flow of the medium in the second manifold into the second heat exchange tube 3054 and the third heat exchange tube 3057. The second heat exchange tube 3054 and the third heat exchange tube 3057 do not block the first manifold, and do not affect the flow of the medium in the first manifold into the first heat exchange tube 3051.

[0142] Alternatively, as Figures 26 to 29 As shown, the end of the first heat exchange tube 3051 is bent in a direction away from the second heat exchange tube 3054 and the third heat exchange tube 3057 to form a first bend portion 3094; and / or the end of the second heat exchange tube 3054 is bent in a direction away from the first heat exchange tube 3051 to form a second bend portion; and / or the end of the third heat exchange tube 3057 is bent in a direction away from the first heat exchange tube 3051 to form a third bend portion.

[0143] The first heat exchange tube 3051, the second heat exchange tube 3054, and the third heat exchange tube 3057 each include a first end and a second end that are oppositely disposed. The first end 3052 of the first heat exchange tube, the first end 3055 of the second heat exchange tube, and the first end 3058 of the third heat exchange tube correspond to each other and are located on the same side of the three-medium heat exchanger. The second end 3053 of the first heat exchange tube, the second end 3056 of the second heat exchange tube, and the second end 3059 of the third heat exchange tube correspond to each other and are located on the same side of the three-medium heat exchanger.

[0144] The end of the first heat exchange tube 3051 is bent in a direction away from the second heat exchange tube 3054 and the third heat exchange tube 3057 to form a first bending portion 3094. The setting of the first bending portion 3094 makes the end of the first heat exchange tube 3051 away from the second heat exchange tube 3054 and the third heat exchange tube 3057, so that there is a gap between the first heat exchange tube 3051 and one end of the second heat exchange tube 3054 and the third heat exchange tube 3057. In this way, the first bending portion 3094 is away from the second manifold, so that the first heat exchange tube 3051 can be completely located outside the second manifold.

[0145] The end of the second heat exchange tube 3054 is bent in a direction away from the first heat exchange tube 3051 to form a second bend portion. The setting of the second bend portion makes the end of the second heat exchange tube 3054 away from the first heat exchange tube 3051, so that the second bend portion is away from the first manifold, so that the second heat exchange tube 3054 can be completely located outside the first manifold.

[0146] The end of the third heat exchange tube 3057 is bent in a direction away from the first heat exchange tube 3051 to form a third bending portion. The setting of the third bending portion makes the end of the third heat exchange tube 3057 away from the first heat exchange tube 3051, so that the third bending portion is away from the first manifold, so that the third heat exchange tube 3057 can be completely located outside the first manifold.

[0147] The first manifold is connected to the end of the first heat exchange tube 3051, and the second manifold is connected to the ends of both the second heat exchange tube 3054 and the third heat exchange tube 3057. There are two situations: the first manifold is connected to the first end 3052 of the first heat exchange tube, and the second manifold is connected to the first end 3058 of both the second heat exchange tube 3054 and the third heat exchange tube. The second manifold is connected to the second end 3053 of the first heat exchange tube, and the second manifold is connected to the second end 3059 of both the second heat exchange tube 3054 and the third heat exchange tube.

[0148] In the first case, the first bend 3094 is provided at the first end 3052 of the first heat exchange tube, the second bend is provided at the first end 3055 of the second heat exchange tube, and the third bend is provided at the first end 3058 of the third heat exchange tube.

[0149] In the second case, the first bend 3094 is provided at the second end 3053 of the first heat exchange tube, the second bend is provided at the second end 3056 of the second heat exchange tube, and the third bend is provided at the second end 3059 of the third heat exchange tube.

[0150] Optionally, the first bending portion 3094 includes one or more bending segments; and / or the second bending portion includes one or more bending segments; and / or the third bending portion includes one or more bending segments.

[0151] The first bending portion 3094, the second bending portion, and the third bending portion include one or more bending sections, which can achieve the purpose of the first heat exchange tube 3051 being located outside the second manifold, and the second heat exchange tube 3054 and the third heat exchange tube 3057 being located outside the first manifold.

[0152] Optionally, when the first bending portion 3094 , the second bending portion or the third bending portion includes multiple bending segments, the multiple bending segments include: a first bending segment 3095 and a second bending segment 3096 .

[0153] Among them, Figure 29 As shown, the second bending section 3096 extends along the length direction of the first heat exchange tube 3051, the second heat exchange tube 3054 or the third heat exchange tube 3057 where it is located, and the first bending section 3095 is connected between the second bending section 3096 and the first heat exchange tube 3051, the second heat exchange tube 3054 or the third heat exchange tube 3057 where it is located, and forms a bend at the connection between the second bending section 3096 and the first heat exchange tube 3051, the second heat exchange tube 3054 or the third heat exchange tube 3057 where it is located, and at the connection with the second bending section 3096. The second bending section 3096 and the first heat exchange tube 3051, the second heat exchange tube 3054 or the third heat exchange tube 3057 where the second bending section 3096 is located are located on opposite sides of the first bending section 3095.

[0154] When the first bending portion 3094 includes multiple bending sections, the second bending section 3096 extends along the length of the first heat exchange tube 3051. The first bending section 3095 is connected between the second bending section 3096 and the first heat exchange tube 3051. The first bending section 3095 forms a bend at both the connection with the first heat exchange tube 3051 and the connection with the second bending section 3096. The second bending section 3096 and the first heat exchange tube 3051 are located on opposite sides of the first bending section 3095. The first heat exchange tube 3051 is connected to the first manifold via the second bending section 3096.

[0155] When the second bending portion includes multiple bending sections, the second bending section 3096 extends along the length of the second heat exchange tube 3054. The first bending section 3095 is connected between the second bending section 3096 and the second heat exchange tube 3054. The first bending section 3095 forms a bend at both the connection with the second heat exchange tube 3054 and the connection with the second bending section 3096. The second bending section 3096 and the second heat exchange tube 3054 are located on opposite sides of the first bending section 3095. The second heat exchange tube 3054 is connected to the second manifold via the second bending section 3096.

[0156] When the third bending portion includes multiple bending sections, the second bending section 3096 extends along the length of the third heat exchange tube 3057. The first bending section 3095 is connected between the second bending section 3096 and the third heat exchange tube 3057. The first bending section 3095 forms a bend at both the connection with the third heat exchange tube 3057 and the connection with the second bending section 3096. The second bending section 3096 and the third heat exchange tube 3057 are located on opposite sides of the first bending section 3095. The third heat exchange tube 3057 is connected to the second manifold via the second bending section 3096.

[0157] The second bending section 3096 and the first heat exchange tube 3051, the second heat exchange tube 3054 or the third heat exchange tube 3057 where the second bending section 3096 is located are located on opposite sides of the first bending section 3095, so that there is a gap between the second bending section 3096 and the first heat exchange tube 3051, the second heat exchange tube 3054 or the third heat exchange tube 3057 where the second bending section 3096 is located, and they are independent of each other, so that the first heat exchange tube 3051 can be located outside the second manifold, and the second heat exchange tube 3054 and the third heat exchange tube 3057 can be located outside the first manifold.

[0158] Optionally, when the end of the first heat exchange tube 3051 is bent in a direction away from the second heat exchange tube 3054 and the third heat exchange tube 3057 to form a first bend 3094, the ends of the second heat exchange tube 3054 and the third heat exchange tube 3057 corresponding to the first bend 3094 are fitted together, or the ends of the second heat exchange tube 3054 and the third heat exchange tube 3057 corresponding to the first bend 3094 are parallel.

[0159] When the first bending portion 3094 is provided at the first end portion 3052 of the first heat exchange tube, the first end portion 3055 of the second heat exchange tube is bent toward the third heat exchange tube 3057, and the first end portion 3058 of the third heat exchange tube is bent toward the second heat exchange tube 3054, so that the first end portion 3055 of the second heat exchange tube and the first end portion 3058 of the third heat exchange tube are fitted together, and the first end portion 3055 of the second heat exchange tube and the first end portion 3058 of the third heat exchange tube can be connected by welding technology.

[0160] When the first bend 3094 is provided at the second end 3053 of the first heat exchange tube, the second end 3056 of the second heat exchange tube is bent toward the third heat exchange tube 3057, and the second end 3059 of the third heat exchange tube is bent toward the second heat exchange tube 3054, so that the second end 3056 of the second heat exchange tube and the second end 3059 of the third heat exchange tube are in contact with each other. The second end 3056 of the second heat exchange tube and the second end 3059 of the third heat exchange tube can be connected by welding, as shown in FIG. Figure 28 and Figure 29 shown.

[0161] It can be understood that when the first bend 3094 is provided at the first end 3052 of the first heat exchange tube, the first end 3055 of the second heat exchange tube and the first end 3058 of the third heat exchange tube may also be parallel.

[0162] It can be understood that when the first bend 3094 is provided at the second end 3053 of the first heat exchange tube, the second end 3056 of the second heat exchange tube and the second end 3059 of the third heat exchange tube may also be parallel.

[0163] Alternatively, as Figure 24 and Figure 25 As shown, the medium inlet and outlet 3097 of the first heat exchange tube 3051 are arranged on the side wall of the first heat exchange tube 3051. In this case, an end cover 3103 can be set on the end face of the first heat exchange tube 3051 in the longitudinal direction to close the opening on the end face of the first heat exchange tube 3051; or, the medium inlet and outlet 3097 of the second heat exchange tube 3054 and the third heat exchange tube 3057 are respectively arranged on the side walls of the second heat exchange tube 3054 and the third heat exchange tube 3057, and are located on the same side of the second heat exchange tube 3054 and the heat exchange tube. In this case, an end cover 3103 can be set on the end face of the second heat exchange tube 3054 and the third heat exchange tube 3057 in the longitudinal direction to close the opening on the end face of the second heat exchange tube 3054 and the third heat exchange tube 3057.

[0164] The ends of the first heat exchange tube 3051, the second heat exchange tube 3054, and the third heat exchange tube 3057 are all provided with a medium inlet and outlet 3097. The medium inlet and outlet 3097 of the first heat exchange tube 3051 is connected to the first manifold, and the medium inlet and outlet 3097 of the second heat exchange tube 3054 and the third heat exchange tube 3057 are both connected to the second manifold.

[0165] The medium inlet and outlet 3097 of the first heat exchange tube 3051 are arranged on the side wall of the first heat exchange tube 3051, so that the first convergence tube can be arranged on one side of the first heat exchange tube 3051. At this time, whether the medium inlet and outlet 3097 of the second heat exchange tube 3054 and the third heat exchange tube 3057 are arranged on the side wall of the second heat exchange tube 3054 and the third heat exchange tube 3057 or on the end face of the second heat exchange tube 3054 and the third heat exchange tube 3057, the first heat exchange tube 3051 can be located outside the second convergence tube, and the second heat exchange tube 3054 and the third heat exchange tube 3057 can be located outside the first convergence tube.

[0166] The medium inlet and outlet 3097 of the second heat exchange tube 3054 and the third heat exchange tube 3057 are respectively arranged on the side walls of the second heat exchange tube 3054 and the third heat exchange tube 3057, and are located on the same side of the second heat exchange tube 3054 and the third heat exchange tube 3057 (for example, both are located on the same side). Figure 26 The second heat exchange tube 3054 and the third heat exchange tube 3057 are located on the left or right side of the second heat exchange tube 3054 and the third heat exchange tube 3057, thereby facilitating communication between the second manifold and the medium inlet and outlet of the second heat exchange tube 3054 and the third heat exchange tube 3057. In this case, whether the medium inlet and outlet 3097 of the first heat exchange tube 3051 is located on the side wall of the first heat exchange tube 3051 or on the end face of the first heat exchange tube 3051, the first heat exchange tube 3051 can be located outside the second manifold, and the second heat exchange tube 3054 and the third heat exchange tube 3057 can both be located outside the first manifold.

[0167] Optionally, at least one of the first heat exchange tube 3051 , the second heat exchange tube 3054 and the third heat exchange tube 3057 is a microchannel heat exchange tube, and the multiple microchannels of the microchannel heat exchange tube include a first microchannel 3098 and a second microchannel 3099 .

[0168] like Figure 24 and Figure 25 As shown, the first microchannel 3098 is located at the outermost side of the microchannel heat exchange tube in the width direction; the second microchannel 3099 is located at the inner side of the first microchannel 3098.

[0169] The medium inlet and outlet 3097 is provided on the outer wall of the first microchannel 3098 , and the side wall of the second microchannel 3099 is provided with a connecting port 3100 to connect the second microchannel 3099 and the first microchannel 3098 .

[0170] When first heat exchange tube 3051 is a microchannel heat exchange tube, second microchannel 3099 communicates with first microchannel 3098 via communication port 3100, and first microchannel 3098 communicates with the first manifold via medium inlet / outlet 3097. First microchannel 3098 is located at the outermost side of the microchannel heat exchange tube in the width direction, and medium inlet / outlet 3097 is located on the outer wall of first microchannel 3098 rather than on the outer wall of second microchannel 3099. This provides ample space for the first manifold, and the first manifold does not affect heat exchange between first heat exchange tube 3051, second heat exchange tube 3054, and third heat exchange tube 3057.

[0171] When the second heat exchange tube 3054 or the third heat exchange tube 3057 is a microchannel heat exchange tube, the second microchannel 3099 is connected to the first microchannel 3098 via the connecting port 3100, and the first microchannel 3098 is connected to the second manifold via the medium inlet and outlet 3097. The first microchannel 3098 is located at the outermost side of the microchannel heat exchange tube in the width direction, and the medium inlet and outlet 3097 are located on the outer wall of the first microchannel 3098 rather than the outer wall of the second microchannel 3099. This provides sufficient space for the second manifold, and the second manifold does not affect the heat exchange between the first heat exchange tube 3051, the second heat exchange tube 3054, and the third heat exchange tube 3057.

[0172] Alternatively, as Figure 20 In the embodiment, the first manifold and the second manifold are arranged opposite to each other, for example, in parallel; or Figure 21 In the embodiment, the first manifold and the second manifold are staggered.

[0173] The first manifold connects the three-medium heat exchanger, the first fluid flows into the first manifold and enters the first heat exchange tube 3051 or flows into the first manifold from the first heat exchange tube 3051, the second manifold connects the load side heat exchanger and the third heat exchanger, the second fluid flows into the second manifold and enters the load side heat exchanger and the third heat exchanger or flows into the second manifold from the second heat exchange tube 3054 and the third heat exchange tube 3057.

[0174] Optionally, the first manifold and the second manifold extend in the same direction and share a portion of the pipe wall, and are respectively located on two opposite sides of the shared portion of the pipe wall.

[0175] By adopting a solution in which the first manifold and the second manifold share part of the tube wall, it is possible to achieve the effect that the first heat exchange tube 3051 is located outside the second manifold, and the second heat exchange tube 3054 and the third heat exchange tube 3057 are both located outside the first manifold, and the medium in the first manifold and the medium in the second manifold can exchange heat through the partition, thereby enhancing the heat exchange effect of the three-medium heat exchanger.

[0176] Example 4:

[0177] Different from the first, second and third embodiments, Figures 30 to 34 As shown, an embodiment of the present disclosure provides a three-medium heat exchanger, which includes a heat exchange tube group 305 , and the heat exchange tube group 305 includes a first heat exchange tube 3051 and an isolation heat exchange tube 3060 .

[0178] The isolation heat exchange tube 3060 is sleeved on the outside of the first heat exchange tube 3051; Figure 30 As shown, the outer surface of the first heat exchange tube 3051 is provided with a first concave-convex structure 3101 .

[0179] The isolation heat exchange tube 3060 is sleeved outside the first heat exchange tube 3051, thereby reducing the area on the first heat exchange tube 3051 available for heat exchange with the air. When the temperature of the medium in the first heat exchange tube 3051 is T1, the temperature of the air is T2, and the temperature of the medium in the isolation heat exchange tube 3060 is T3, and T1, T2, and T3 increase or decrease sequentially, the heat exchange area between the first heat exchange tube 3051 and the air is smaller. Therefore, less of the medium in the first heat exchange tube 3051 exchanges heat with the air, and more of the medium exchanges heat with the medium in the isolation heat exchange tube 3060. This reduces the cooling loss caused by the medium in the first heat exchange tube 3051 first exchanging heat with the air and then with the medium in the isolation heat exchange tube 3060, thereby improving the heat exchange efficiency between the medium in the first heat exchange tube 3051 and the medium in the isolation heat exchange tube 3060.

[0180] Moreover, the outer surface of the first heat exchange tube 3051 is provided with a first concave-convex structure 3101, which can further increase the contact area between the first heat exchange tube 3051 and the isolating heat exchange tube 3060, enhance the heat exchange rate between the medium in the first heat exchange tube 3051 and the medium in the isolating heat exchange tube 3060, and further improve the heat exchange efficiency between the medium in the first heat exchange tube 3051 and the medium in the isolating heat exchange tube 3060.

[0181] Optionally, the first concave-convex structure 3101 includes a threaded structure provided on the outer surface of the first heat exchange tube 3051 .

[0182] The thread structure can be processed using a special tool, and the processing technology is simple. The axis of the thread structure coincides with the axis of the first heat exchange tube 3051.

[0183] In addition to the thread structure, the first concave-convex structure 3101 may also be a plurality of non-threaded ribs and / or grooves provided on the outer surface of the first heat exchange tube 3051 .

[0184] Optionally, the three-medium heat exchanger further includes a first header 3068 , a second header 3071 , a third header 3074 and a fourth header 3075 .

[0185] The first header 3068 is connected to the first end 3052 of the first heat exchange tube. The second header 3071 is connected to the first end 3061 of the isolated heat exchange tube. The third header 3074 is connected to the second end 3053 of the first heat exchange tube. The fourth header 3075 is connected to the second end 3062 of the isolated heat exchange tube.

[0186] The first end 3052 of the first heat exchange tube is connected to the first header 3068, and the second end 3053 of the first heat exchange tube is connected to the third header 3074. The first header 3068 and the third header 3074 are respectively disposed at opposite ends of the first heat exchange tube 3051. The medium flows into the first heat exchange tube 3051 through the first header 3068 and then into the third header 3074. Alternatively, the medium flows into the first heat exchange tube 3051 through the third header 3074 and then into the first header 3068.

[0187] The first end 3061 of the isolated heat exchange tube is connected to the second header 3071, and the second end 3062 of the isolated heat exchange tube is connected to the fourth header 3075. The second header 3071 and the fourth header 3075 are respectively disposed at opposite ends of the isolated heat exchange tube 3060. The medium flows through the second header 3071 into the isolated heat exchange tube 3060 and then into the fourth header 3075. Alternatively, the medium flows through the fourth header 3075 into the isolated heat exchange tube 3060 and then into the second header 3071.

[0188] Optionally, the first collecting pipe 3068 is sleeved on the outside of the second collecting pipe 3071 or the second collecting pipe 3071 is sleeved on the outside of the first collecting pipe 3068 to form an inner and outer tube structure, so that the first collecting pipe 3068 and the second collecting pipe 3071 can share the tube wall of the inner tube, thereby enhancing the heat exchange between the medium in the first collecting pipe 3068 and the medium in the second collecting pipe 3071, and enhancing the heat exchange capacity of the three-medium heat exchanger.

[0189] The third collecting pipe 3074 is sleeved on the outside of the fourth collecting pipe 3075 or the fourth collecting pipe 3075 is sleeved on the outside of the third collecting pipe 3074 to form an inner and outer pipe structure. In this way, the third collecting pipe 3074 and the fourth collecting pipe 3075 can share the pipe wall of the inner pipe, thereby enhancing the heat exchange between the medium in the third collecting pipe 3074 and the medium in the fourth collecting pipe 3075, and enhancing the heat exchange capacity of the three-medium heat exchanger.

[0190] Optionally, when the first collecting pipe 3068 is sleeved on the outside of the second collecting pipe 3071, the outer wall of the second collecting pipe 3071 is provided with a second concave-convex structure to increase the surface area of ​​the outer wall of the second collecting pipe 3071, thereby increasing the heat exchange area between the medium in the first collecting pipe 3068 and the medium in the second collecting pipe 3071.

[0191] When the second header 3071 is sleeved on the outside of the first header 3068, the first end portion 3052 of the first heat exchange tube protrudes from the first end portion inside the isolation heat exchange tube 3060, and the first end portion 3052 of the first heat exchange tube is partially located inside the second header 3071. The outer wall surface of the first header 3068 is provided with a third concave-convex structure to increase the surface area of ​​the outer wall surface of the first header 3068, thereby increasing the heat exchange area between the medium in the first header 3068 and the medium in the second header 3071.

[0192] When the third collecting pipe 3074 is arranged on the outside of the fourth collecting pipe 3075, the outer wall of the fourth collecting pipe 3075 is provided with a fourth concave-convex structure to increase the surface area of ​​the outer wall of the fourth collecting pipe 3075, thereby increasing the heat exchange area between the medium in the third collecting pipe 3074 and the medium in the fourth collecting pipe 3075.

[0193] When the fourth collecting pipe 3075 is arranged on the outside of the third collecting pipe 3074, the second end portion 3053 of the first heat exchange tube protrudes out of the second end portion inside the isolation heat exchange tube 3060, and the second end portion 3053 of the first heat exchange tube is partially located inside the fourth collecting pipe 3075. The outer wall surface of the third collecting pipe 3074 is provided with a fifth concave-convex structure to increase the surface area of ​​the outer wall surface of the third collecting pipe 3074, thereby increasing the heat exchange area between the medium in the third collecting pipe 3074 and the medium in the fourth collecting pipe 3075.

[0194] The second to fifth concave-convex structures are the concave-convex structures in Example 1, at least one of which is a threaded structure, and the axis of the threaded structure coincides with the axis of the first collecting pipe 3068, the second collecting pipe 3071, the third collecting pipe 3074 or the fourth collecting pipe 3075 where it is located.

[0195] Optionally, the first collecting pipe 3068 and the second collecting pipe 3071 share a portion of the pipe wall and are respectively located on two opposite sides of the shared portion of the pipe wall; and / or the third collecting pipe 3074 and the fourth collecting pipe 3075 share a portion of the pipe wall and are respectively located on two opposite sides of the shared portion of the pipe wall.

[0196] A first partition 3077 is provided in one tube body, extending along the length of the tube body and dividing the tube body into a first header 3068 and a second header 3071. The first and second headers 3068 and 3071 share a portion of the sidewall forming the first partition 3077. Alternatively, a second partition 3078 is provided in another tube body, dividing the tube body into a third and fourth headers 3074 and 3075. The second partition 3078 shares a portion of the sidewall forming the second partition 3078.

[0197] The medium in the first header 3068 and the medium in the second header 3071 can exchange heat through the first partition 3077, thereby enhancing the heat exchange efficiency of the three-medium heat exchanger. The medium in the third header 3074 and the medium in the fourth header 3075 can exchange heat through the second partition 3078, thereby enhancing the heat exchange efficiency of the three-medium heat exchanger.

[0198] Optionally, a sixth concave-convex structure is provided on a portion of the tube wall shared by the first collecting tube 3068 and the second collecting tube 3071 .

[0199] A sixth concave-convex structure is provided on the outer surface of the shared portion of the tube wall to increase the outer surface area of ​​the shared portion of the tube wall and the heat exchange area between the first header 3068 and the second header 3071. The sixth concave-convex structure may be ribs and / or grooves.

[0200] The first manifold 3068 and the second manifold 3071 are arranged in parallel to increase the length of the shared portion of the pipe wall.

[0201] A seventh concave-convex structure is provided on a portion of the tube wall shared by the third collecting tube 3074 and the fourth collecting tube 3075 .

[0202] A seventh concave-convex structure is provided on the outer surface of the shared portion of the tube wall to increase the outer surface area of ​​the shared portion of the tube wall and the heat exchange area between the third header 3074 and the fourth header 3075. The seventh concave-convex structure may be ribs and / or grooves.

[0203] The third header 3074 and the fourth header 3075 are arranged in parallel to increase the length of the shared portion of the tube wall.

[0204] Optionally, there are multiple heat exchange tube groups 305 , and the multiple heat exchange tube groups 305 are arranged in sequence along the length direction of the first header 3068 .

[0205] A third fin 3102 is provided on the outside of the isolation heat exchange tube 3060, and the third fins 3102 on the outside of the isolation heat exchange tube 3060 of two adjacent heat exchange tube groups 305 are directly connected, or it can be understood that the third fin 3102 on the outside of the isolation heat exchange tube 3060 of one heat exchange tube group 305 is in contact with the isolation heat exchange tube 3060 of its adjacent heat exchange tube group 305.

[0206] The three-medium heat exchanger further includes a first diversion pipe and / or a second diversion pipe 3091 .

[0207] When the medium in the first header 3068 flows into the third header 3074 through the first heat exchange tube 3051 , the first diverter pipe is connected to the first header 3068 . The first diverter pipe is provided with a first diverter port, and the medium flows into the first header 3068 through the first diverter port.

[0208] The first diverter tube is provided with a first diverter port, and the first header 3068 is provided with a first inlet port. The medium flows through the first diverter port and the first inlet port, respectively, and then into the first header 3068. The first diverter tube acts as a buffer chamber. After passing through the first diverter tube, the medium enters the first header 3068. The medium is gathered and buffered in the first diverter tube, allowing the medium to flow more evenly into the first heat exchange tubes 3051 of each heat exchange tube group 305. There can be one or more first diverter ports. When there are multiple first diverter ports, the number of first diverter ports, the number of first inlet ports, and the number of heat exchange tube groups 305 are equal and correspond one to one. The first diverter tube is also provided with a first diverter inlet. There is only one first diverter inlet. As the distance from the first diverter inlet increases, the flow area of ​​the first diverter inlet increases, and the flow area of ​​the first inlet increases. For example, if the first diverter inlet is a circular inlet, as the distance from the first diverter inlet increases, the inner diameter of the first diverter inlet increases, and the inner diameter of the first inlet increases, so that the amount of medium flowing into the first heat exchange tubes 3051 in each heat exchange tube group 305 is roughly balanced. The first diverter inlet is located in the middle of the length of the first diverter tube to further improve the uniformity of the medium flowing through the first diverter tube into the first heat exchange tubes 3051 in each heat exchange tube group 305.

[0209] When the medium in the second header 3071 flows into the fourth header 3075 through the isolation heat exchange tube 3060 , the second diversion pipe 3091 is connected to the second header 3071 . The second diversion pipe 3091 is provided with a second diversion port 3092 , and the medium flows into the second header 3071 through the second diversion port 3092 .

[0210] The second diverter pipe 3091 is provided with a second diverter port 3092, and the second header pipe 3071 is provided with a second inlet port 3072. The medium flows through the second diverter port 3092 and the second inlet port 3072 in sequence and then flows into the second header pipe 3071. The second diverter pipe 3091 acts as a buffer chamber. After passing through the second diverter pipe 3091, the medium enters the second header pipe 3071. The medium is gathered and buffered in the second diverter pipe 3091, thereby allowing the medium to flow more evenly into the isolation heat exchange tubes 3060 of each heat exchange tube group 305. There can be one or more second diverter ports 3092. When there are multiple second diverter ports 3092, the number of second diverter ports 3092, the number of second inlet ports 3072, and the number of heat exchange tube groups 305 are equal and correspond one to one. The second diverter pipe 3091 is further provided with a second diverter inlet 3093. There is one second diverter inlet 3093. As the distance from the second diverter inlet 3093 increases, the flow area of ​​the second diverter inlet 3092 increases, and the flow area of ​​the second inlet 3072 increases. Taking the second diverter inlet 3092 as a circular port as an example, as the distance from the second diverter inlet 3093 increases, the inner diameter of the second diverter inlet 3092 increases, and the inner diameter of the second inlet 3072 increases. Figure 2 D1≤D2, such as Figure 34 D5 < D6 < D7, so that the amount of medium flowing into the isolation heat exchange tubes 3060 in each heat exchange tube group 305 is roughly balanced. The second diversion inlet 3093 is located in the middle of the second diversion tube 3091 in the longitudinal direction to further improve the uniformity of the medium flowing through the second diversion tube 3091 into the isolation heat exchange tubes 3060 in each heat exchange tube group 305.

[0211] Optionally, there are multiple heat exchange tube groups 305 , and the multiple heat exchange tube groups 305 are arranged in sequence along the length direction of the first header 3068 .

[0212] The second header 3071 has a second inlet 3072. The medium flows into the second header 3071 through the second inlet 3072 and flows into the fourth header 3075 through the isolating heat exchange tube 3060. As the distance between the first end 3061 of the isolating heat exchange tube and the second inlet 3072 increases, the flow area of ​​the isolating heat exchange tube 3060 increases.

[0213] Among the isolation heat exchange tubes 3060 of the multiple heat exchange tube groups 305, the isolation heat exchange tubes 3060 that are farther away from the second inlet 3072 have a larger flow area, so that more medium can still flow into the isolation heat exchange tubes 3060 that are farther away from the second inlet 3072, so that the amount of medium flowing into the isolation heat exchange tubes 3060 of each heat exchange tube group 305 is uniform.

[0214] The first header 3068 has a first inlet port, through which the medium flows into the first header and then into the third header 3074 through the first heat exchange tube 3051. As the distance between the first end 3052 of the first heat exchange tube and the first inlet port increases, the flow area of ​​the first heat exchange tube 3051 increases.

[0215] Among the first heat exchange tubes 3051 of the multiple heat exchange tube groups 305, the flow area of ​​the first heat exchange tube 3051 that is farther away from the first inlet is larger, so that more medium can still flow into the first heat exchange tube 3051 that is farther away from the first inlet, so that the amount of medium flowing into the first heat exchange tube 3051 of each heat exchange tube group 305 is uniform.

[0216] The shapes of the first heat exchange tube 3051 and the isolation heat exchange tube 3060 are not limited. For example, the first heat exchange tube 3051 is cylindrical, and the isolation heat exchange tube 3060 is also cylindrical.

[0217] A first medium flows through the first heat exchange tube 3051 , and a second medium flows through the isolation heat exchange tube 3060 . The first medium is water, and the second medium is a refrigerant.

[0218] Optionally, according to a second aspect of an embodiment of the present utility model, a heat pump system is provided, comprising the three-medium heat exchanger according to any one of the above embodiments.

[0219] The heat pump system includes a connected compressor 10, a first reversing member 20, a three-medium heat exchanger 30, a load-side heat exchanger 40, a first throttling element 50, a second throttling element 60, a branch pipeline 70 and a hot water heat exchanger.

[0220] 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 three-medium heat exchanger, the third interface 203 is connected to the first connection port 402 of the load side heat exchanger, and the fourth interface 204 is connected to the return air port of the compressor 10 through the return air pipeline.

[0221] The second connection port 302 of the three-medium heat exchanger, the first throttling element 50, the second throttling element 60, and the second connection port 401 of the load-side heat exchanger are connected in sequence. The first connection port 301 of the three-medium heat exchanger is connected to the first end of the isolation heat exchange tube, and the second connection port 302 of the three-medium heat exchanger is connected to the second end of the isolation heat exchange tube.

[0222] 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 .

[0223] The hot water heat exchanger corresponds to the branch pipe 70 to exchange heat with the branch pipe 70, so that the hot water heat exchanger can provide hot water.

[0224] A first throttling element 50 and a second throttling element 60 are disposed between the second connection port 302 of the three-medium heat exchanger and the second connection port 401 of the load-side 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 system.

[0225] The three-medium heat exchanger 30 can be a ground source heat exchanger, a water source heat exchanger, or an air source heat exchanger. For example, the ground source heat exchanger 30 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 double-tube water-fluorine heat exchanger.

[0226] The load-side 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.

[0227] 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 .

[0228] The hot water heat exchanger has a third water inlet pipe for cold water to enter and a third water outlet pipe for hot water to flow out.

[0229] The first reversing member 20 may be a four-way valve, or a combination of other valves.

[0230] Optionally, the first throttling element 50 includes a first electronic expansion valve.

[0231] Optionally, the second throttling element 60 includes a second electronic expansion valve.

[0232] Optionally, the branch pipeline 70 includes a hot water heat exchange pipeline, which exchanges heat with a hot water heat exchanger.

[0233] The heat pump system further includes a third throttling element 112 , which is disposed in the branch line 70 . Along the direction from the first end to the second end of the branch line 70 , the hot water heat exchange line and the third throttling element 112 are sequentially disposed.

[0234] 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 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 cannot produce hot water.

[0235] Optionally, the third throttling element 112 includes a third electronic expansion valve.

[0236] Optionally, the heat pump system further includes a gas-liquid separator, which is connected between the return air port of the compressor 10 and the fourth interface 204 .

[0237] Optionally, the branch pipeline 70 includes a hot water heat exchange pipeline, a first connecting pipeline 702 and a second connecting pipeline 703 .

[0238] 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; 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.

[0239] The hot water heat exchange pipeline, the first connecting pipeline 702 and the second connecting pipeline 703 are independent components. When the hot water heat exchanger needs to be used, the first connecting pipeline 702 is connected to the hot water heat exchange pipeline and the second connecting pipeline 703 is connected to the hot water heat exchange pipeline.

[0240] The first connecting line 702 is provided with a second switch 105 for controlling the on / off switching of the first connecting line 702, thereby preventing the refrigerant of the refrigeration system from flowing out of the first connecting line 702. The second connecting line 703 is provided with a third switch 106 for controlling the on / off switching of the second connecting line 703, thereby preventing the refrigerant of the refrigeration system from flowing out of the second connecting line 703. This allows the hot water heat exchange line to be disconnected from the first connecting line 702, and also from the second connecting line 703. Thus, the hot water heat exchange line does not need to be installed 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 line, when to install the hot water heat exchange line, and how to use the hot water heat exchanger according to their needs, thereby improving user satisfaction with the heat pump system.

[0241] Optionally, the second switch 105 is a stop valve.

[0242] Optionally, the third switch 106 is a stop valve.

[0243] Optionally, the heat pump system further includes a third throttling element 112 , and the third throttling element 112 is provided in the second connecting pipeline 703 .

[0244] 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 .

[0245] Optionally, the one end of the second connecting line 703 is connected between the first throttling element 50 and the second throttling element 60 .

[0246] Optionally, the heat pump system further includes a filter 104 , which is provided in the second connecting pipeline 703 to filter the refrigerant in the second connecting pipeline.

[0247] The first end of the first heat exchange tube is connected to the first water inlet pipe, the second end of the first heat exchange tube is connected to the first water outlet pipe, the first end of the isolation heat exchange tube is connected to the second interface, and the second end of the isolation heat exchange tube is connected to the second connection port of the load side heat exchanger.

[0248] When the isolation heat exchange tube includes a second heat exchange tube and a third heat exchange tube, the first ends of the second heat exchange tube and the third heat exchange tube are both connected to the second interface, and the second ends of the second heat exchange tube and the third heat exchange tube are both connected to the second connection port of the load side heat exchanger, so that refrigerant flows through the second heat exchange tube and the third heat exchange tube.

[0249] When the isolating heat exchange tube is sleeved on the outside of the first heat exchange tube, the first end of the isolating heat exchange tube is connected to the second interface, and the second end of the isolating heat exchange tube is connected to the second connection port of the load-side heat exchanger.

[0250] The heat pump system further includes a first fan 3105, which is disposed on one side of the three-medium heat exchanger and is used to drive air to exchange heat with the three-medium heat exchanger.

[0251] The refrigerant in the isolated heat exchange tube can exchange heat with the water in the first heat exchange tube and can also exchange heat with the air through the first fin. The first fan drives the air to flow through the three-medium heat exchanger, thereby exchanging heat with the isolated heat exchange tube, thereby increasing the heat exchange capacity of the refrigerant.

[0252] As the heat pump system is used for a longer time, an imbalance of heat and cold will appear in the soil on the ground source side. At this time, the first fan needs to be turned on to supplement the heat exchange. The heat exchange time on the wind side (first fan) is increased during the cooling / heating season to reduce the heat and cold output of the ground source so that the heat and cold output of the soil can be balanced throughout the year.

[0253] The heat pump system also includes a controller, which is connected to the first fan and is configured to: control the first fan to turn on when the load of the load-side heat exchanger is greater than the heat exchange rate between the water in the first heat exchange tube and the refrigerant in the isolation heat exchange tube; control the first fan to turn off when the load of the load-side heat exchanger is less than or equal to the heat exchange rate between the water in the first heat exchange tube and the refrigerant in the isolation heat exchange tube.

[0254] For example, if the load of the load-side heat exchanger is A kilowatts (kW), and the heat exchange rate between the water in the first heat exchange tube and the refrigerant in the isolation heat exchange tube is B kilowatts, if A is greater than B, it means that the heat exchange rate between the water and the refrigerant is insufficient. In this case, the first fan needs to be turned on to increase the heat exchange rate of the refrigerant by exchanging heat with the air in the isolation heat exchange tube. If A is less than or equal to B, it means that the heat exchange rate between the water and the refrigerant is sufficient, and the first fan does not need to be turned on.

[0255] Optionally, when the blockage degree of the first water inlet pipeline and / or the first water outlet pipeline is greater than a preset degree, the controller controls the first fan to turn on.

[0256] When the blockage degree of the first water inlet pipe and / or the first water outlet pipe is greater than a preset degree, the amount of water in the first heat exchange pipe will be insufficient, and the heat exchange between the water in the first heat exchange pipe and the refrigerant in the isolation heat exchange pipe will be insufficient. Therefore, the first fan is controlled to turn on to enhance the heat exchange between the refrigerant in the isolation heat exchange pipe and the air to supplement the heat exchange.

[0257] Optionally, the controller is configured to control the start and stop of the first fan according to the ambient temperature, the temperature of the refrigerant flowing into the isolation heat exchange tube, and the temperature of the water flowing into the first heat exchange tube.

[0258] The ambient temperature determines the heat exchange capacity of the air and the refrigerant in the isolated heat exchange tubes. The temperature of the refrigerant flowing into the isolated heat exchange tubes determines the required heat exchange capacity of the refrigerant. The temperature of the water flowing into the first heat exchange tube determines the heat exchange capacity of the water and the refrigerant in the isolated heat exchange tubes. When the heat exchange capacity provided by the water to the refrigerant meets the refrigerant's heat exchange requirements, further heat exchange between the air and the refrigerant is no longer required, and the first fan is controlled to be turned off. When the heat exchange capacity provided by the water to the refrigerant does not meet the refrigerant's heat exchange requirements, further heat exchange between the air and the refrigerant is required, and the first fan is controlled to be turned on.

[0259] Optionally, the heat pump system further includes a first header, a second header, a third header, and a fourth header.

[0260] The first collecting pipe is connected between the first water inlet pipe and the first end of the first heat exchange pipe, and the water in the first water inlet pipe flows into the first end of the first heat exchange pipe through the first collecting pipe; the second collecting pipe is connected between the second interface and the first end of the isolation heat exchange pipe; the third collecting pipe is connected between the first water outlet pipe and the second end of the first heat exchange pipe, and the water in the first heat exchange pipe flows out to the first water outlet pipe in sequence through the second end of the first heat exchange pipe and the third collecting pipe; the fourth collecting pipe is connected between the second end of the isolation heat exchange pipe and the second connection port of the load side heat exchanger.

[0261] Optionally, the heat pump system further includes a second fan, which is arranged corresponding to the fourth heat exchange tube and is used to drive air to exchange heat with the fourth heat exchange tube.

[0262] The second fins on the outer surface of the fourth heat exchange tube provide a strong heat exchange capability between the fourth heat exchange tube and the air outside the fourth heat exchange tube. A second fan is positioned opposite the fourth heat exchange tube to drive more air to exchange heat with the fourth heat exchange tube, thereby enhancing the heat exchange capability between the fourth heat exchange tube and the air.

[0263] The controller is connected to the second fan and is configured to control the rotation speed of the second fan according to the difference between the ambient temperature and the temperature of the refrigerant flowing into the fourth heat exchange tube.

[0264] When the temperature difference between the refrigerant flowing into the fourth heat exchange tube and the air outside the fourth heat exchange tube is greater than the preset temperature difference, the temperature difference between the refrigerant flowing into the fourth heat exchange tube and the air is large, the heat exchange temperature gradient is large, the heat exchange is strong, and the speed of the second fan is increased to enhance the heat exchange between the refrigerant and the air; when the temperature difference between the refrigerant flowing into the fourth heat exchange tube and the air outside the fourth heat exchange tube is less than or equal to the preset temperature difference, the temperature difference between the refrigerant flowing into the fourth heat exchange tube and the air is small, the heat exchange temperature gradient is small, the heat exchange is weakened, the speed of the second fan is reduced, and the energy consumption of the heat pump system is reduced.

[0265] The second header is provided with a second medium outlet, and the fourth header is provided with a second medium inlet; the three-medium heat exchanger further comprises a connecting heat exchange pipe, a first partition plate and a second partition plate.

[0266] The connecting heat exchange tube is arranged between the fourth heat exchange tube and the heat exchange tube group, and the first end and the second end of the connecting heat exchange tube are respectively connected to the second collecting tube and the fourth collecting tube; the first partition is arranged in the second collecting tube, for dividing the second collecting tube into a first sub-region and a second sub-region, wherein the first sub-region is connected to the first end of the fourth heat exchange tube, and the second sub-region is connected to the first end of the isolation heat exchange tube and the connecting heat exchange tube; the second partition is arranged in the fourth collecting tube, for dividing the fourth collecting tube into a third sub-region and a fourth sub-region, the third sub-region is connected to the fourth heat exchange tube and the second end of the connecting heat exchange tube, and the fourth sub-region is connected to the second end of the isolation heat exchange tube.

[0267] Optionally, under standard operating conditions, the ratio of the sum of the heat exchange rates between the refrigerant and the air in the fourth heat exchange tube and the connecting heat exchange tube to the sum of the heat exchange rates between the water in the first heat exchange tube and the refrigerant in the isolating heat exchange tube is determined according to the load distribution, wherein the sum of the heat exchange rates between the water in the first heat exchange tube and the refrigerant in the isolating heat exchange tube refers to the sum of the heat exchange rates between the water in the first heat exchange tube and the refrigerant in the isolating heat exchange tube in all the heat exchange tube groups.

[0268] The sum of the heat exchange between the refrigerant and air in the fourth heat exchange tube and the connecting heat exchange tube, plus the sum of the heat exchange between the water in the first heat exchange tube and the refrigerant in the isolation heat exchange tube, equals the load of the load-side heat exchanger. For example, when testing under standard operating conditions, if the sum of the heat exchange between the water in the first heat exchange tube and the refrigerant in the isolation heat exchange tube accounts for 40% of the load, then the sum of the heat exchange between the refrigerant and air in the fourth heat exchange tube and the connecting heat exchange tube should account for 60% of the load. Based on the heat exchange, parameters such as the material and heat exchange area of ​​the fourth heat exchange tube, the connecting heat exchange tube, the first heat exchange tube, and the isolation heat exchange tube can be designed.

[0269] Optionally, the heat pump system also includes a controller, which is connected to the first reversing member 20, the first throttling element 50 and the second throttling element 60, 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 to be in a throttling state.

[0270] like Figure 39 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 three-medium heat exchanger 30 is located is disconnected, and no refrigerant flows through the three-medium 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.

[0271] 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 to produce hot water, and then passes through the second throttling element 60 or the third throttling element 112 to throttle, flows into the load side heat exchanger 40, the load side 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.

[0272] Optionally, the heat pump system also includes a controller, which is connected to the first reversing member 20, the first throttling element 50 and the second throttling element 60, 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.

[0273] like Figure 40 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.

[0274] 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 to produce hot water. The other path passes through the first interface 201 and the second interface 202 and flows into the isolation heat exchange pipe of the three-medium heat exchanger 30. After the two paths are merged, they flow through the second throttling element 60 for throttling and flow into the load-side heat exchanger 40. The load-side 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.

[0275] 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 and the three-medium heat exchanger 30 require different heat loads, the amount of refrigerant flowing through the branch pipe 70 and the three-medium 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.

[0276] Optionally, the heat pump system also includes a controller, which is connected to the first reversing member 20, the first throttling element 50 and the second throttling element 60, and is configured to: in the domestic hot water supply mode, control the second throttling element 60 to close, and control one of the first throttling element 50 and the third throttling element to open, and the other to be in a throttling state.

[0277] like Figure 37 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 to produce hot water, and then passes through the first throttling element 50 or the third throttling element 112 to flow into the three-medium 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.

[0278] Optionally, the heat pump system also includes a controller, which is connected to the first reversing member 20, the first throttling element 50 and the second throttling element 60, 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.

[0279] like Figure 38 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 compressor 10 is divided into two paths. One path passes through branch pipe 70, where it exchanges heat with the hot water heat exchanger to produce hot water. The other path flows through first port 201 and third port 203 into load-side heat exchanger 40, where it is condensed and heated. After the two paths merge, they flow through first throttling element 50 for throttling, flow into three-medium heat exchanger 30, and then return to the return air port of compressor 10 through second port 202 and fourth port 204.

[0280] 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.

[0281] The heat pump system of the present application can also operate in cooling mode and heating mode.

[0282] like Figure 35 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 three-medium 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 load side heat exchanger 40, evaporates and cools the load side heat exchanger 40, and then flows back to the return air port of the compressor 10 through the third interface 203 and the fourth interface 204.

[0283] In heating mode, if Figure 36 As shown, the third throttling element 112 is closed, the branch pipe 70 is disconnected, and the refrigerant flowing out of the exhaust port of the compressor 10 enters the load side 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 three-medium 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.

[0284] 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 three-medium heat exchanger, characterized in that: Including heat exchange tube group, the heat exchange tube group includes: a first heat exchange tube; An isolation heat exchange tube is sleeved on the outer side of the first heat exchange tube; Wherein, the outer surface of the first heat exchange tube is provided with a first concave-convex structure.

2. The three-medium heat exchanger according to claim 1, characterized in that: The first concave-convex structure includes a thread structure provided on the outer surface of the first heat exchange tube.

3. The three-medium heat exchanger according to claim 1 or 2, characterized in that: Also includes: a first header, connected to the first end of the first heat exchange tube; a second header, connected to the first end of the isolation heat exchange tube; a third header, connected to the second end of the first heat exchange tube; The fourth header is connected to the second end of the isolation heat exchange tube.

4. The three-medium heat exchanger according to claim 3, characterized in that: The first header is sleeved on the outside of the second header or the second header is sleeved on the outside of the first header; and / or The third collecting pipe is sleeved on the outer side of the fourth collecting pipe, or the fourth collecting pipe is sleeved on the outer side of the third collecting pipe.

5. The three-medium heat exchanger according to claim 4, characterized in that: In the case where the first collecting pipe is sleeved on the outer side of the second collecting pipe, the outer wall surface of the second collecting pipe is provided with a second concave-convex structure; When the second header is sleeved on the outside of the first header, the outer wall of the first header is provided with a third concave-convex structure; When the third header is sleeved on the outer side of the fourth header, the outer wall of the fourth header is provided with a fourth concave-convex structure; When the fourth header is sleeved on the outside of the third header, the outer wall surface of the third header is provided with a fifth concave-convex structure.

6. The three-medium heat exchanger according to claim 3, characterized in that: The first header and the second header share a portion of the tube wall and are located on two opposite sides of the shared portion of the tube wall; and / or The third collecting pipe and the fourth collecting pipe share a portion of the pipe wall and are respectively located on two opposite sides of the shared portion of the pipe wall.

7. The three-medium heat exchanger according to claim 6, characterized in that: A sixth concave-convex structure is provided on a portion of the tube wall shared by the first and second headers; and / or A seventh concave-convex structure is provided on a portion of the tube wall shared by the third collecting tube and the fourth collecting tube.

8. The three-medium heat exchanger according to claim 3, characterized in that: There are multiple heat exchange tube groups, and the multiple heat exchange tube groups are arranged in sequence along the length direction of the first header; the three-medium heat exchanger also includes: A first diversion pipe is connected to the first header, the first diversion pipe is provided with a first diversion port, and the medium flows into the first header through the first diversion port; and / or The second diverter pipe is connected to the second header pipe. The second diverter pipe is provided with a second diverter port. The medium flows into the second header pipe through the second diverter port.

9. The three-medium heat exchanger according to claim 3, characterized in that: There are multiple heat exchange tube groups, and the multiple heat exchange tube groups are arranged in sequence along the length direction of the first header; The first header is provided with a first inlet, through which the medium flows into the first header, and as the distance between the first end of the first heat exchange tube and the first inlet increases, the flow area of ​​the first heat exchange tube increases; and / or The second header is provided with a second inlet, through which the medium flows into the second header. As the distance between the first end of the isolating heat exchange tube and the second inlet increases, the flow area of ​​the isolating heat exchange tube increases.

10. A heat pump device, characterized in that: include: compressor; According to any one of claims 1 to 9, the first heat exchange tube is connected to the compressor, and the isolation heat exchange tube is configured to be connected to a water source.

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