Heat exchanger and heat pump system

Abstract

The utility model relates to the technical field of heat pumps, and discloses a heat exchanger and a heat pump system. The heat exchanger comprises a plurality of heat exchange tube sets. The fins are arranged on the outer sides of the heat exchange tube sets, first gaps are formed between the fins on the heat exchange tube sets and the heat exchange tube sets adjacent to the heat exchange tube sets provided with the fins, and bending parts are arranged on the fins. Due to the arrangement of the bent parts, the area of the fins is increased, the contact area of the fins and the air is increased, and heat exchange between the heat exchange tube set and the air is further enhanced.

Description

Technical Field

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

[0002] Heat exchangers play a key role in many industries, and with the growing awareness of energy conservation in recent years, the demand for heat exchangers has continued to increase.

[0003] The related art provides a three-medium heat exchanger. The heat exchanger includes two headers and a plurality of heat exchange tubes, which are arranged in sequence along the height direction of the headers, with gaps between adjacent heat exchange tubes to form a third medium channel. One of the headers is provided with a first vertical partition extending along its height direction to divide the internal space of the header into a first tube pass and a second tube pass. The other header is provided with a second vertical partition extending along its height direction to divide the internal space of the header into a third tube pass and a fourth tube pass. Each heat exchange tube includes an upper flat tube and a lower flat tube attached to the bottom surface of the upper flat tube. The ends of the upper flat tube are respectively connected to the first tube pass and the third tube pass to form a first medium channel. The ends of the lower flat tube are respectively connected to the second tube pass and the fourth tube pass to form a second medium channel.

[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] In the related art, a fin is provided in the third medium channel, the upper end of the fin is in contact with the lower flat tube of one heat exchange tube, and the lower end of the fin is in contact with the upper flat tube of another heat exchange tube, resulting in a small amount of air filling the fin, thereby reducing the heat exchange efficiency between the heat exchange tube and the air.

[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 heat exchanger and a heat pump system to solve the problem of low heat exchange efficiency between heat exchange tubes and air in the related art.

[0009] According to a first aspect of an embodiment of the present utility model, a heat exchanger is provided, comprising: a plurality of heat exchange tube groups; fins, which are arranged on the outside of the heat exchange tube groups, and a first gap is provided between the fins on the heat exchange tube groups and the adjacent heat exchange tube groups of the heat exchange tube groups provided with the fins, and a bending portion is provided on the fins.

[0010] Optionally, fins are provided on the opposite surfaces of two adjacent heat exchange tube groups, and a second gap is provided between the fins provided on the opposite surfaces of two adjacent heat exchange tube groups.

[0011] Optionally, the width a of the second gap satisfies: h / 2≤a≤h, where h is the height of the fin.

[0012] Optionally, the fin includes a fin unit, which includes: a first section, one end of the first section is connected to the heat exchange tube group where it is located; a second section, one end of the second section is connected to the heat exchange tube group where it is located, and the other end of the first section and the other end of the second section both extend in a direction away from the heat exchange tube group where they are located and are connected, and a bend is formed at the connection.

[0013] Optionally, the longitudinal section of the fin is sawtooth-shaped, wavy-shaped or trapezoidal.

[0014] Optionally, a plurality of fin units are arranged in sequence along the length direction of the heat exchange tube group.

[0015] Optionally, the bent portions of the fins provided on the opposite surfaces of two adjacent heat exchange tube groups are staggered.

[0016] Optionally, the heat exchange tube group includes: a first heat exchange tube; a second heat exchange tube; a third heat exchange tube, the second heat exchange tube and the third heat exchange tube are attached to two opposite outer surfaces of the first heat exchange tube; and fins are provided on the outer surfaces of the second heat exchange tube and / or the third heat exchange tube.

[0017] Optionally, the heat exchange tube group includes: a first heat exchange tube; a second heat exchange tube, which is sleeved on the outside of the first heat exchange tube; and fins are arranged on the outer surface of the second heat exchange tube.

[0018] According to a second aspect of the embodiments of the present invention, a heat pump system is provided, comprising the heat exchanger as described in any one of the above embodiments.

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

[0020] A first gap is defined between the fins on the heat exchange tube group and adjacent heat exchange tube groups provided with the fins. The provision of the first gap increases the amount of air surrounding the fins. The heat exchange tube group exchanges heat with the air through the fins provided thereon. The increased amount of air surrounding the fins can increase the heat exchange efficiency between the fins and the air, thereby enhancing the heat exchange between the heat exchange tube group and the air.

[0021] The provision of the bent portion increases the area of the fin, thereby increasing the contact area between the fin and the air, further enhancing the heat exchange between the heat exchange tube group and the air.

[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 is a schematic structural diagram of a heat exchanger provided by an embodiment of the present disclosure, wherein the solid arrows indicate the flow direction of the second medium, and the dotted arrows indicate the flow direction of the first medium;

[0025] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0026] Figure 3 is a schematic structural diagram of another heat exchanger provided by an embodiment of the present disclosure, wherein the solid arrows indicate the flow direction of the second medium, and the dotted arrows indicate the flow direction of the first medium;

[0027] Figure 4 is a schematic diagram of a heat pump system provided by an embodiment of the present disclosure, wherein the dotted arrow indicates the flow direction of the first medium.

[0028] Reference numerals:

[0029] 300, heat exchanger; 305, heat exchange tube group; 3051, first heat exchange tube; 3052, second heat exchange tube; 3053, third heat exchange tube; 3055, first tube group; 3056, second tube group; 3057, first fin; 3058, second fin; 3059, first gap; 3060, second gap; 3061, first header; 3062, second header; 3063, third header; 3064, fourth header; 3065, first header; 3066, second header; 3067, first section; 3068, second section; 3069, bend; 3070, fin unit; 3071, third tube group; 3072, fourth tube group; 3073, fin;

[0030] 10. Compressor; 20. First reversing member; 201. First interface; 202. Second interface; 203. Third interface; 204. Fourth interface; 303. First water inlet pipeline; 304. First water outlet pipeline; 40. Load-side heat exchanger; 401. First connection port of the load-side heat exchanger; 402. Second connection port of the load-side heat exchanger; 403. Second water inlet pipeline; 404. Second water outlet pipeline; 50. First throttling element; 60. Second throttling element; 70. Branch pipeline; 702. First connecting pipeline; 703. Second connecting pipeline; 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. DETAILED DESCRIPTION

[0031] 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.

[0032] 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 herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0033] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to 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.

[0034] 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.

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

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Combine Figure 1 and Figure 3 As shown, an embodiment of the present disclosure provides a heat exchanger 300 including a plurality of heat exchange tube groups 305 and fins 3073 .

[0040] The heat exchanger further includes a first header 3065 and a second header 3066 disposed opposite each other. The heat exchange tube group 305 is disposed between the first header 3065 and the second header 3066. For example, the length of the heat exchange tube group 305 extends from the first header 3065 to the second header 3066. The plurality of heat exchange tube groups 305 are sequentially arranged along the height direction of the first header 3065 or the second header 3066.

[0041] Multiple heat exchange tube groups 305 are arranged in sequence, and the fins 3073 are arranged on the outside of the heat exchange tube group 305. There is a first gap 3059 between the fins 3073 on the heat exchange tube group 305 and the adjacent heat exchange tube group 305 on which the fins 3073 are provided, and a bending portion 3069 is provided on the fins 3073.

[0042] The plurality of heat exchange tube groups 305 include a first tube group 3055 and a second tube group 3056. The first tube group 3055 and the second tube group 3056 are arranged sequentially along the height direction of the first header 3065 or the second header 3066, and the first tube group 3055 and the second tube group 3056 are arranged adjacent to each other. Fins 3073 are provided on each of the first tube group 3055 and the second tube group 3056. A first gap 3059 is defined between the fins 3073 on the first tube group 3055 and the second tube group 3056, and a first gap 3059 is defined between the fins 3073 on the second tube group 3056 and the first tube group 3055.

[0043] The provision of the first gap 3059 prevents the fins 3073 on the first tube group 3055 from directly contacting the second tube group 3056, and the fins 3073 on the second tube group 3056 from directly contacting the first tube group 3055. This increases the amount of air surrounding the fins 3073 on the first tube group 3055 and the fins 3073 on the second tube group 3056. This is equivalent to increasing the heat exchange area between the fins 3073 on the first tube group 3055 and the fins 3073 on the second tube group 3056 and the air, thereby enhancing the heat exchange efficiency between the fins 3073 on the first tube group 3055 and the fins 3073 on the second tube group 3056 and the air.

[0044] The fins 3073 on the first tube group 3055 and the fins 3073 on the second tube group 3056 both have a bent portion 3069. Compared with the flat fins 3073, the bent portion 3069 can increase the area of the fins 3073, further increase the heat exchange area between the fins 3073 and the air, and improve the heat exchange efficiency between the fins 3073 and the air, thereby enhancing the heat exchange efficiency between the heat exchange tube group 305 and the air.

[0045] Optionally, fins 3073 are provided on the opposite surfaces of two adjacent heat exchange tube groups 305 , and a second gap 3060 is provided between the fins 3073 provided on the opposite surfaces of two adjacent heat exchange tube groups 305 .

[0046] For example, fins 3073 are provided on the opposing surfaces of the first tube group 3055 and the second tube group 3056, that is, fins 3073 are provided on the surface of the first tube group 3055 facing the second tube group 3056, and fins 3073 are provided on the surface of the second tube group 3056 facing the first tube group 3055. A second gap 3060 is provided between the fins 3073 provided on the surface of the first tube group 3055 facing the second tube group 3056 and the fins 3073 provided on the surface of the second tube group 3056 facing the first tube group 3055.

[0047] like Figure 1 As shown, the heat exchanger includes four heat exchange tube groups, namely the first tube group, the second tube group, the third tube group 3071 and the fourth tube group 3072.

[0048] For the convenience of description, the fins provided on the surface of the first tube group 3055 facing the second tube group 3056 are named first fins 3057 , and the fins provided on the surface of the second tube group 3056 facing the first tube group 3055 are named second fins 3058 .

[0049] The first gap 3059 includes the second gap 3060. The first gap 3059 refers to the distance between the first fin 3057 and the second tube group 3056. Taking the first fin 3057 provided on the third heat exchange tube 3053 of the first tube group 3055 as an example, the third heat exchange tube 3053 of the first tube group 3055 is arranged opposite to the first heat exchange tube 3051 of the second tube group 3056. The first gap 3059 is the distance between the first fin 3057 and the surface of the first heat exchange tube 3051 of the second tube group 3056 facing the first fin 3057. Figure 1 For example, the first gap 3059 is the distance between the first fin 3057 and the upper surface of the first heat exchange tube 3051.

[0050] There is a first gap 3059 between the first fin 3057 and the second tube group 3056 , a first gap 3059 between the second fin 3058 and the first tube group 3055 , and a second gap 3060 between the first fin 3057 and the second fin 3058 .

[0051] Alternatively, as Figure 2 As shown, the width a of the second gap satisfies: h / 2≤a≤h, where h is the height of the fin.

[0052] If a<h / 2, the gap between the fins of two adjacent heat exchange tube groups 305 is too small, the amount of air around the fins is limited, and the heat exchange efficiency between the fins and the air cannot be significantly improved; if a>h, when the gap between two adjacent heat exchange tube groups 305 is limited, a is too large and the height of the fins needs to be reduced, thereby reducing the heat exchange area of the fins, which will also reduce the heat exchange efficiency between the fins and the air.

[0053] Therefore, it is set that h / 2≤a≤h, for example, a is h / 2, 0.6h, 0.7h, 0.8h, 0.9h or h.

[0054] Alternatively, as Figure 1 and Figure 2As shown, the fin includes a fin unit 3070. The fin unit 3070 includes a first section 3067 and a second section 3068. One end of the first section 3067 is connected to the heat exchange tube group 305 where the first section 3067 is located, for example, they are in close contact with each other; one end of the second section 3068 is connected to the heat exchange tube group 305 where the second section 3068 is located, for example, they are in close contact with each other. The other end of the first section 3067 and the other end of the second section 3068 both extend away from the heat exchange tube group 305 where the first section 3067 and the second section 3068 are located and are connected, with a bend 3069 formed at the connection.

[0055] One end of the first section 3067 is arranged at the heat exchange tube group 305 where it (the first section 3067) is located, and one end of the second section 3068 is arranged at the heat exchange tube group 305 where it (the second section 3068) is located. The other end of the first section 3067 is inclined toward the other end of the second section 3068, and the other end of the second section 3068 is inclined toward the other end of the first section 3067, so that a bending portion 3069 is formed at the connection between the other end of the first section 3067 and the other end of the second section 3068 to increase the heat exchange efficiency between the fin unit 3070 and the air.

[0056] Alternatively, as Figures 1 to 3 As shown, the longitudinal section of the fin is zigzag, wavy, trapezoidal, or other shapes.

[0057] The other end of the first section 3067 and the other end of the second section 3068 can be directly connected to form a triangular structure. In this case, the longitudinal section of the fin unit 3070 can be serrated or wavy. The other end of the first section 3067 and the other end of the second section 3068 can also be connected through a connecting section. In this case, the longitudinal section of the fin unit 3070 can be trapezoidal.

[0058] The longitudinal section of the fin is zigzag, wavy or trapezoidal, which can increase the contact area between the fin and the air and enhance the heat exchange capacity between the fin and the air.

[0059] Optionally, a plurality of fin units 3070 are sequentially arranged along the length direction of the heat exchange tube group 305 to increase the total area of the fins.

[0060] Optionally, the bent portions 3069 of the fins provided on the opposing surfaces of two adjacent heat exchange tube groups 305 are staggered. For example, the bent portions 3069 of the first fin 3057 and the bent portions 3069 of the second fin 3058 are staggered. This allows a larger amount of air to flow through the bent portions 3069 of the first fin 3057 and the second fin 3058, thereby enhancing the heat exchange capability between the bent portions 3069 and the air.

[0061] The heat exchanger may be a three-medium heat exchanger. In this case, regarding the form of the heat exchange tube group 305 , in a specific embodiment, the heat exchange tube group 305 includes a first heat exchange tube 3051 , a second heat exchange tube 3052 and a third heat exchange tube 3053 .

[0062] The second heat exchange tube 3052 and the third heat exchange tube 3053 are attached to two opposite outer surfaces of the first heat exchange tube 3051 ; fins are provided on the outer surfaces of the second heat exchange tube 3052 and / or the third heat exchange tube 3053 .

[0063] like Figures 1 to 3 As shown, the second heat exchange tube 3052 and the third heat exchange tube 3053 are respectively arranged on opposite sides of the first heat exchange tube 3051, and fins are arranged on the surface of the second heat exchange tube 3052 and / or the third heat exchange tube 3053 that is at least partially not facing the first heat exchange tube 3051. In this way, the area on the first heat exchange tube 3051 that can exchange heat with the air is reduced. Due to the arrangement of the fins, the heat exchange capacity between the second heat exchange tube 3052 and / or the third heat exchange tube 3053 and the air is enhanced. 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 3052 and the third heat exchange tube 3053 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 3052 and the third heat exchange tube 3053, 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 3052 and the third heat exchange tube 3053, 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 3052 and the third heat exchange tube 3053.

[0064] The first header includes a first header 3061 and a second header 3062. The first header 3061 is sleeved outside the second header 3062, or the second header 3062 is sleeved outside the first header 3061. The second header includes a third header 3063 and a fourth header 3064. The third header 3063 is sleeved outside the fourth header 3064, or the fourth header 3064 is sleeved outside the third header 3063. The first header 3061 is connected to one end of the first heat exchange tube 3051, the other end of the first heat exchange tube 3051 is connected to the second header 3062, one end of the second heat exchange tube 3052 and the third heat exchange tube 3053 is connected to the second header 3062, and the other ends of the second heat exchange tube 3052 and the third heat exchange tube 3053 are connected to the fourth header 3064.

[0065] The first medium flows into the first heat exchange tube 3051 through the first header 3061 and flows out through the third header 3063 . Alternatively, the first medium flows into the first heat exchange tube 3051 through the third header 3063 and flows out through the first header 3061 .

[0066] The second medium flows into the second heat exchange tube 3052 and the third heat exchange tube 3053 through the second header 3062 and flows out through the fourth header 3064 . Alternatively, the second medium flows into the second heat exchange tube 3052 and the third heat exchange tube 3053 through the fourth header 3064 and flows out through the second header 3062 .

[0067] In another specific embodiment, the heat exchange tube group 305 includes a first heat exchange tube 3051 and a second heat exchange tube 3052 . The second heat exchange tube 3052 is sleeved on the outside of the first heat exchange tube 3051 . Fins are provided on the outer surface of the second heat exchange tube 3052 .

[0068] The fin may extend along the circumference of the second heat exchange tube 3052 to form a ring, or the fin may include multiple sub-fins, each sub-fin includes one or more fin units 3070 , and the multiple sub-fins are sequentially arranged along the circumference of the second heat exchange tube 3052 .

[0069] The first header includes a first header 3061 and a second header 3062. The first header 3061 is sleeved outside the second header 3062, or the second header 3062 is sleeved outside the first header 3061. The second header includes a third header 3063 and a fourth header 3064. The third header 3063 is sleeved outside the fourth header 3064, or the fourth header 3064 is sleeved outside the third header 3063. The first header 3061 is connected to one end of the first heat exchange tube 3051, the other end of the first heat exchange tube 3051 is connected to the second header 3062, and one end of the second heat exchange tube 3052 is connected to the second header 3062, and the other end of the second heat exchange tube 3052 is connected to the fourth header 3064.

[0070] The first medium flows into the first heat exchange tube 3051 through the first header 3061 and flows out through the third header 3063 . Alternatively, the first medium flows into the first heat exchange tube 3051 through the third header 3063 and flows out through the first header 3061 .

[0071] The second medium flows into the second heat exchange tube 3052 through the second header 3062 and flows out through the fourth header 3064 . Alternatively, the second medium flows into the second heat exchange tube 3052 through the fourth header 3064 and flows out through the second header 3062 .

[0072] The heat exchanger can be placed vertically, such as Figure 1 As shown, it can also be placed horizontally, such as Figure 3shown.

[0073] The present disclosure also provides a heat pump system. Figure 4 As shown, the heat pump system includes a compressor 10, a first reversing member 20, a load-side heat exchanger 40, and a heat exchanger as described in any one of the above embodiments.

[0074] The heat pump system will be described by taking the heat exchange tube group 305 including the first heat exchange tube 3051 , the second heat exchange tube 3052 and the third heat exchange tube 3053 as an example.

[0075] The first reversing element 20 includes first to fourth ports 204. The first port 201 is connected to the exhaust port of the compressor 10, the third port 203 is connected to the first connection port 401 of the load-side heat exchanger, and the fourth port 204 is connected to the return air port of the compressor 10. One of the second header 3062 and the fourth header 3064 is connected to the second port 202, and the other of the second header 3062 and the fourth header 3064 is connected to the second connection port 402 of the load-side heat exchanger. The second medium is a refrigerant.

[0076] The heat pump system further includes a first throttling element 50 , a second throttling element 60 , a branch line 70 and a hot water heat exchanger.

[0077] like Figure 4 As shown, the second header 3062 is connected to the second interface 202 , and the fourth header 3064 is connected to the second connection port 402 of the load-side heat exchanger.

[0078] The heat exchanger, the first throttle element 50, the second throttle element 60, and the second connection port 402 of the load-side heat exchanger are connected in sequence.

[0079] 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 .

[0080] 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.

[0081] A first throttling element 50 and a second throttling element 60 are disposed between the heat exchanger and the second connection port 402 of the load-side heat exchanger, and 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.

[0082] The heat exchanger can be a ground source heat exchanger, a water source heat exchanger, or an air source heat exchanger. For example, in a ground source heat exchanger, the first medium is water. The ground source heat exchanger has a first water inlet pipe 303 and a first water outlet pipe 304 connected to the ground source, exchanging heat with the ground source. The first water inlet pipe 303 is connected to one of the first header 3061 and the third header 3063, and the first water outlet pipe 304 is connected to the other of the first header 3061 and the third header 3063. Water in the first water inlet pipe 303 enters the first heat exchange pipe 3051 through one of the first header 3061 and the third header 3063, and enters the first water outlet pipe 304 through the other of the first header 3061 and the third header 3063.

[0083] The flow direction of the first medium in the first heat exchange tube 3051 is opposite to the flow direction of the second medium in the second heat exchange tube 3052 and the third heat exchange tube 3053 , thereby enhancing the heat exchange effect between the first medium and the second medium.

[0084] The load side heat exchanger 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.

[0085] 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 .

[0086] 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.

[0087] The first reversing member 20 may be a four-way valve, or a combination of other valves.

[0088] Optionally, the first throttling element 50 includes a first electronic expansion valve.

[0089] Optionally, the second throttling element 60 includes a second electronic expansion valve.

[0090] Optionally, the branch pipeline 70 includes a hot water heat exchange pipeline, which exchanges heat with a hot water heat exchanger.

[0091] The third throttling element 112 is provided in the branch pipeline 70 , and the hot water heat exchange pipeline and the third throttling element 112 are sequentially provided along a direction from the first end to the second end of the branch pipeline 70 .

[0092] 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.

[0093] Optionally, the third throttling element 112 includes a third electronic expansion valve.

[0094] 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 .

[0095] Optionally, the branch pipeline 70 includes a hot water heat exchange pipeline, a first connecting pipeline 702 and a second connecting pipeline 703 .

[0096] 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.

[0097] 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.

[0098] 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.

[0099] Optionally, the second switch 105 is a stop valve.

[0100] Optionally, the third switch 106 is a stop valve.

[0101] 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 .

[0102] 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 .

[0103] Optionally, the one end of the second connecting line 703 is connected between the first throttling element 50 and the second throttling element 60 .

[0104] Optionally, the heat pump system further includes a filter 104 , which is disposed in the second connecting pipeline 703 to filter the refrigerant in the second connecting pipeline 703 .

[0105] like Figure 4 As shown, the water inlet end of the first heat exchange tube 3051 is connected to the first water inlet pipeline 303, the water outlet end of the first heat exchange tube 3051 is connected to the first water outlet pipeline 304, one end of the second heat exchange tube 3052 and the third heat exchange tube 3053 is connected to the second interface 202, and the other end of the second heat exchange tube 3052 and the third heat exchange tube 3053 is connected to the second connection port 402 of the load side heat exchanger.

[0106] In heat recovery mode, which is a cooling and domestic hot water production mode, the first throttle element 50 is closed, the pipeline where the heat exchanger is located is disconnected, and no refrigerant flows through the heat exchanger. The second throttle element 60 is open, and refrigerant flows through the pipeline where the second throttle element 60 is located, but the second throttle element 60 does not throttle the refrigerant, and the third throttle element 112 is in a throttled state. Alternatively, the second throttle element 60 is in a throttled state, the third throttle element 112 is open, and refrigerant flows through the pipeline where the third throttle element 112 is located, but the third throttle element 112 does not throttle the refrigerant.

[0107] 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, the load side heat exchanger 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.

[0108] 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.

[0109] Partial heat recovery mode is a refrigeration and domestic hot water production mode. In this mode, the first throttle element 50 and the third throttle are both open and do not have a throttling function, and the second throttle element 60 performs a throttling effect.

[0110] 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 second heat exchange tube 3052 and the third heat exchange tube 3053 of the heat exchanger. After the two paths are merged, they flow through the second throttling element 60 for throttling and flow into the load side heat exchanger. The load side heat exchanger 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.

[0111] 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 heat exchanger require different heat loads, the amount of refrigerant flowing through the branch pipe 70 and the heat exchanger 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.

[0112] 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.

[0113] 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 heat exchanger, and then flows back to the return air port of the compressor 10 through the second interface 202 and the fourth interface 204.

[0114] 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.

[0115] The non-heat recovery mode is a mode for heating and producing domestic hot water. 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 the load-side heat exchanger, where it is condensed and heated. After the two paths merge, they flow through first throttling element 50 for throttling, flow into the second and third heat exchange tubes 3052 and 3053 of the heat exchanger, and then return to the return air port of compressor 10 through second port 202 and fourth port 204.

[0116] 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.

[0117] The heat pump system of the present application can also operate in cooling mode and heating mode.

[0118] Taking the example of the second manifold 3062 being connected to the second interface 202 and the fourth manifold 3064 being connected to the load-side heat exchanger, in the cooling mode, the third throttling element 112 is closed and the branch line 70 is disconnected. The refrigerant flowing out of the exhaust port of the compressor 10 enters the second manifold 3062 through the first interface 201 and the second interface 202, flows into the second heat exchange tube 3052 and the third heat exchange tube 3053, exchanges heat with the water in the first heat exchange tube 3051, and the refrigerant in the heat exchanger condenses and releases heat. It is throttled by the fourth manifold 3064, the first throttling element 50 or the second throttling element 60, and flows into the load-side heat exchanger. The load-side heat exchanger 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.

[0119] In the heating mode, the third throttling element 112 is closed and the branch pipe 70 is disconnected. The refrigerant flowing out of the exhaust port of the compressor 10 enters the load side heat exchanger through the first interface 201 and the third interface 203 to condense and release heat. It is throttled by the first throttling element 50 or the second throttling element 60, flows into the second heat exchange tube 3052 and the third heat exchange tube 3053, exchanges heat with water, and after heat exchange, flows back to the return air port of the compressor 10 through the second interface 202 and the fourth interface 204.

[0120] The heat pump system provided in the present application includes the heat exchanger as described in any one of the above embodiments, and thus has all the beneficial effects of the heat exchanger as described in any one of the above embodiments, which will not be repeated here.

[0121] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A heat exchanger, characterized in that: include: Multiple heat exchange tube groups; The fins are arranged on the outside of the heat exchange tube group, and a first gap is provided between the fins on the heat exchange tube group and the adjacent heat exchange tube group on which the fins are arranged, and a bending portion is provided on the fins.

2. The heat exchanger according to claim 1, characterized in that Fins are provided on the opposite surfaces of two adjacent heat exchange tube groups, and a second gap is provided between the fins provided on the opposite surfaces of two adjacent heat exchange tube groups.

3. The heat exchanger according to claim 2, characterized in that The width a of the second gap satisfies: h / 2≤a≤h, where h is the height of the fin.

4. The heat exchanger according to claim 1, characterized in that The fin includes a fin unit, and the fin unit includes: The first section, one end of which is connected to the heat exchange tube group where it is located; The second section, one end of the second section is connected to the heat exchange tube group where it is located, the other end of the first section and the other end of the second section both extend away from the heat exchange tube group where they are located and are connected, and a bend is formed at the connection.

5. The heat exchanger according to claim 4, characterized in that The plurality of fin units are sequentially arranged along the length direction of the heat exchange tube group.

6. The heat exchanger according to claim 1, characterized in that The longitudinal section of the fin is serrated, wavy or trapezoidal.

7. The heat exchanger according to claim 1, characterized in that The bent portions of the fins on the opposite surfaces of two adjacent heat exchange tube groups are staggered.

8. The heat exchanger according to any one of claims 1 to 7, characterized in that The heat exchange tube group includes: a first heat exchange tube; a second heat exchange tube; The third heat exchange tube, the second heat exchange tube and the third heat exchange tube are attached to two opposite outer surfaces of the first heat exchange tube; The fins are arranged on the outer surface of the second heat exchange tube and / or the third heat exchange tube.

9. The heat exchanger according to any one of claims 1 to 7, characterized in that The heat exchange tube group includes: a first heat exchange tube; The second heat exchange tube is sleeved on the outer side of the first heat exchange tube; The fins are arranged on the outer surface of the second heat exchange tube.

10. A heat pump system, characterized in that: Comprising the heat exchanger according to any one of claims 1 to 9.

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