Heat exchanger and heat pump water heater

Abstract

The utility model belongs to the technical field of water heaters, and particularly relates to a heat exchanger and a heat pump water heater. The heat exchanger comprises a plurality of flat pipe bodies which are sequentially arranged in the axial direction of the water tank inner container. A plurality of flow channels are arranged in the flat pipe body and distributed in the width direction of the flat pipe body at intervals, and the extending direction of the flow channels is parallel to the length direction of the flat pipe body. At least one second heat conduction part is arranged among the multiple flow channels in the width direction of the flat pipe body. According to the heat exchanger and the heat pump water heater, the contact area of the flat pipes of the heat exchanger and the inner container can be increased, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] This application belongs to the field of water heater technology, specifically relating to a heat exchanger and a heat pump water heater. Background Technology

[0002] Flat tube heat exchangers, also known as microchannel heat exchangers, are a key component of heat pump water heaters. A flat tube heat exchanger typically consists of multiple flat tubes, each with several flow channels inside. The refrigerant can circulate within these channels, thereby achieving heat transfer.

[0003] In practical applications, the flat tubes of a flat tube heat exchanger are typically directly attached to the outer surface of the inner tank of the water heater, and the transfer of condensation heat is accomplished through direct contact between the tube wall and the inner tank. When the refrigerant flows inside the flat tube, the heat it releases continuously heats the water in the inner tank through the contact interface until the water temperature reaches the preset value.

[0004] However, the contact area between the flat tube and the inner liner is relatively limited, resulting in low heat exchange efficiency. Utility Model Content

[0005] This application provides a heat exchanger and a heat pump water heater, which can increase the contact area between the flat tube of the heat exchanger and the inner tank, thereby improving the heat exchange efficiency.

[0006] In a first aspect, this application provides a heat exchanger including a plurality of flat tube bodies, wherein the plurality of flat tube bodies are arranged sequentially along the width direction of the flat tube bodies;

[0007] The flat tube body has multiple flow channels inside, which are arranged at intervals along the axial direction of the inner liner of the water tank, and the extension direction of the flow channels is parallel to the length direction of the flat tube body.

[0008] At least one second heat conduction section is provided between the plurality of flow channels in the width direction of the flat tube body.

[0009] In one possible design, the cross-section is a plane perpendicular to the length of the flat tube body, and the cross-sectional area of ​​the middle part of the second heat conduction part is smaller than the cross-sectional area of ​​the end part of the second heat conduction part.

[0010] In one possible design, the second heat conduction part has a contact surface, as well as a first inclined surface and a second inclined surface connected together;

[0011] The contact surface faces the inner side of the flat tube body, and the contact surface is used to contact the outer wall of the inner liner of the water tank;

[0012] The first inclined surface and the second inclined surface face outward from the flat tube body;

[0013] From the end of the second heat conduction section to the middle of the second heat conduction section, the first inclined surface and the second inclined surface extend toward the inside of the flat tube body.

[0014] In one possible design, the second heat-conducting part has a contact surface and an outer plane;

[0015] The contact surface faces the inner side of the flat tube body, and the contact surface is used to contact the outer wall of the inner liner of the water tank;

[0016] The outer plane faces the outside of the flat tube body, and the outer plane is recessed relative to the outer surface of the flat tube body.

[0017] In one possible design, the number of the second heat conduction parts is multiple;

[0018] In the width direction of the flat tube body, a plurality of second heat conduction portions are spaced apart, and the plurality of second heat conduction portions can divide the plurality of flow channels into multiple equal parts.

[0019] In one possible design, a first heat conduction section is provided at each end of the flat tube body in the width direction.

[0020] In one possible design, in the width direction of the flat tube body, the first heat conduction portion has a first end and a second end disposed opposite to each other, the first end being connected to the flat tube body.

[0021] From the first end of the first heat conduction section to the second end of the first heat conduction section, the cross-sectional area of ​​the first heat conduction section decreases.

[0022] In one possible design, a first manifold and a second manifold arranged in parallel are also included;

[0023] The first end of the flat tube body along its length is connected to the first manifold, and the second end of the flat tube body along its length is connected to the second manifold.

[0024] In one possible design, the axial direction of the first manifold is parallel to the width direction of the flat tube body, and the flat tube bodies are spaced apart along the axial direction of the first manifold.

[0025] Secondly, this application provides a heat pump water heater, including a water tank inner tank and any of the above-mentioned heat exchangers;

[0026] The heat exchanger includes multiple flat tube bodies that abut against the outer wall of the inner liner of the water tank.

[0027] The heat exchanger and heat pump water heater provided in this application include a plurality of flat tube bodies arranged sequentially along the axial direction of the inner tank of a water tank. The interior of each flat tube body has a plurality of flow channels spaced apart along its width, with the extension direction of the flow channels parallel to the length direction of the flat tube body. At least one second heat conduction section is provided between the flow channels along the width direction of the flat tube body. By providing a second heat conduction section between the flow channels of the flat tube bodies, the contact area between a single flat tube body and the surface of the inner tank of the water tank can be increased, thereby increasing the overall contact area between the heat exchanger and the surface of the water tank. This helps to reduce the thermal resistance of heat transfer from the surface of the inner tank to the water inside the inner tank, and improves the heat exchange efficiency. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0029] Figure 1 This is a schematic diagram of the structure of a heat exchanger provided in an embodiment of this application;

[0030] Figure 2 for Figure 1 A schematic diagram of the connection structure between the heat exchanger and the inner tank of the water tank.

[0031] Figure 3 for Figure 1 Schematic diagram of the cross-section of the flat tube body along the width direction. Figure 1 ;

[0032] Figure 4 for Figure 3 Schematic diagram of the first heat conduction section Figure 1 ;

[0033] Figure 5 for Figure 3 Schematic diagram of the first heat conduction section Figure 2 ;

[0034] Figure 6 for Figure 3 Schematic diagram of the first heat conduction section Figure 3 ;

[0035] Figure 7 for Figure 1 Schematic diagram of the cross-section of the flat tube body along the width direction. Figure 2 ;

[0036] Figure 8 for Figure 1 Schematic diagram of the cross-section of the flat tube body along the width direction. Figure 3

[0037] Figure 9 for Figure 1Schematic diagram of the cross-section of the flat tube body along the width direction. Figure 4 ;

[0038] Figure 10 for Figure 1 Schematic diagram of the cross-section of the flat tube body along the width direction. Figure 5 .

[0039] Explanation of reference numerals in the attached figures:

[0040] 100-flat tube body;

[0041] 110-flow channel;

[0042] 200 - First heat conduction section;

[0043] 210 - First end;

[0044] 220 - Second end;

[0045] 230 - Third inclined plane;

[0046] 240 - Fourth inclined plane;

[0047] 300 - Second heat conduction section;

[0048] 310 - First inclined surface;

[0049] 320 - Second inclined surface;

[0050] 330 - Contact surface;

[0051] 340 - Outer plane;

[0052] 400 - First manifold;

[0053] 500 - Second manifold;

[0054] 600 - Water tank inner liner.

[0055] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0058] In this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0059] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0060] Unless otherwise stated, the term "multiple" means two or more.

[0061] As can be seen from the background technology, flat tube heat exchangers are usually composed of multiple flat tubes, each of which has several flow channels inside. The refrigerant can circulate in these flow channels to achieve heat transfer.

[0062] In practical applications, the flat tubes of a flat tube heat exchanger are typically directly attached to the outer surface of the inner tank of the water heater, and the transfer of condensation heat is accomplished through direct contact between the tube wall and the inner tank. When the refrigerant flows inside the flat tube, the heat it releases continuously heats the water in the inner tank through the contact interface until the water temperature reaches the preset value.

[0063] However, the contact area between the flat tube and the inner tank is relatively limited. Due to the limited contact area, the rate and total amount of heat transfer will be affected to some extent, resulting in lower heat exchange efficiency. This may cause it to take longer to reach the preset water temperature during the heating process, or require more energy to maintain a stable water temperature.

[0064] To address the aforementioned problems, this application provides a heat exchanger and a heat pump water heater. The heat exchanger includes multiple flat tube bodies arranged sequentially along the axial direction of the inner tank of a water tank. Multiple flow channels are provided inside each flat tube body, spaced apart along its width, with the flow channels extending parallel to the length direction of the flat tube body. At least one second heat conduction section is provided between the multiple flow channels along the width direction of the flat tube body. By providing second heat conduction sections between the flow channels, the contact area between a single flat tube body and the surface of the inner tank of the water tank can be increased along the width direction of the flat tube body, thereby increasing the overall contact area between the heat exchanger and the surface of the water tank. The increased contact area directly reduces the thermal resistance of heat transfer from the surface of the inner tank to the water inside, improving heat exchange efficiency.

[0065] The technical solutions of this application and how they solve the aforementioned technical problems are described in detail below with specific embodiments. These specific embodiments may exist independently or in combination with each other. Identical or similar concepts or processes may not be repeated in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0066] Combination Figure 2 As shown, one aspect of this application provides a heat pump water heater, which typically includes an outer casing (not shown in the figure) and a water tank liner 600 disposed inside the outer casing, the water tank liner 600 being used to store water.

[0067] To heat the water in the tank, the heat pump water heater provided in this embodiment of the application is further provided with a heat exchanger. The heat exchanger includes multiple flat tube bodies 100, which are arranged sequentially along the axial direction of the inner tank 600. Multiple flow channels 110 are provided inside the flat tube bodies 100, which are spaced apart in the width direction of the flat tube bodies 100 and extend in a direction parallel to the length direction of the flat tube bodies 100. First heat conduction parts 200 are respectively provided at both ends of the flat tube bodies 100 in the width direction. At least one second heat conduction part 300 is provided between the multiple flow channels 110 in the width direction of the flat tube bodies 100.

[0068] The flat tube body 100 abuts against the outer wall of the inner tank 600, allowing heat to be transferred more directly from the flat tube body 100 to the water in the inner tank 600, ensuring that the water can be heated quickly.

[0069] By adding a first heat conduction part 200 at both ends of the flat tube body 100, the contact area between a single flat tube body 100 and the surface of the inner tank 600 can be increased, thereby increasing the overall contact area between the heat exchanger and the surface of the water tank. The increased contact area can directly reduce the heat transfer resistance from the surface of the inner tank to the water inside the inner tank, thus improving the heat exchange efficiency.

[0070] By providing a second heat conduction section 300 between the flow channels 110, the contact area between a single flat tube body 100 and the surface of the inner tank 600 can be increased in the width direction of the flat tube body 100, thereby increasing the overall contact area between the heat exchanger and the surface of the inner tank 600. This increased contact area directly reduces the thermal resistance of heat transfer from the inner tank surface to the water inside the inner tank, thus improving heat exchange efficiency.

[0071] By providing a second heat conduction section 300 between the flow channels 110, the number of flow channels 110 can be reduced while maintaining the same width of the flat tube body 100, thereby reducing the complexity of flat tube manufacturing and assembly. The second heat conduction section 300 enables a more uniform heat distribution between the flat tubes, reducing the impact of the reduced number of flow channels 110 on the uniformity of heat transfer. This ensures that even with a reduced number of flow channels 110, the heat exchanger can still effectively transfer heat, guaranteeing the heat exchange efficiency of the heat pump water heater.

[0072] Combination Figure 1 As shown, another embodiment of this application provides a heat exchanger, including a first manifold 400 and a second manifold 500 arranged in parallel, and a plurality of flat tube bodies 100, which are arranged sequentially along the axial direction of the inner liner 600 of the water tank. A first end of the flat tube body 100 in the length direction is connected to the first manifold 400, and a second end of the flat tube body 100 in the length direction is connected to the second manifold 500.

[0073] The heat exchanger is equipped with two parallel manifolds, which can be used as the refrigerant inlet and outlet, respectively. Specifically, the first manifold 400 can be used as the refrigerant inlet, and the second manifold 500 can be used as the refrigerant outlet.

[0074] By arranging the manifolds in parallel, the fluid can be distributed more evenly into each flat tube body 100, reducing the non-uniformity of fluid flow and ensuring that each flat tube body 100 can effectively participate in the heat exchange process, thereby improving the overall heat exchange efficiency.

[0075] By connecting the first end of the flat tube body 100 to the manifold, the refrigerant can directly enter the flat tube body 100 from the manifold, ensuring the smoothness and uniformity of the refrigerant flow. By connecting the second end of the flat tube body 100 to the manifold, the refrigerant can flow out smoothly after completing heat exchange, ensuring the continuity and stability of the refrigerant flow, which helps to reduce energy consumption and makes the heat pump water heater more efficient and energy-saving when reaching the preset water temperature.

[0076] Combination Figure 1 and Figure 2As shown, the axial direction of the first manifold 400 and the second manifold 500 is parallel to the axial direction of the inner tank 600. Multiple flat tube bodies 100 are arranged in parallel between the first manifold 400 and the second manifold 500, and the multiple flat tube bodies 100 are wound around the outer side wall of the inner tank 600 and abut against the outer side wall of the inner tank 600.

[0077] By wrapping the flat tube body 100 around the outer wall of the inner tank 600, each flat tube body 100 can participate in uniform heat exchange, and heat can be transferred more directly from the flat tube body 100 to the inner tank 600, reducing thermal resistance and improving heat transfer efficiency.

[0078] Multiple flat tube bodies 100 are arranged sequentially along the width direction of the flat tube body 100, that is, multiple flat tube bodies 100 are arranged sequentially along the axial direction of the inner tank 600. This arrangement direction ensures that each flat tube body 100 can fully contact the inner tank 600, and there is a large contact area between the flat tube body 100 and the inner tank 600, thereby forming a large heat exchange area and improving the overall heat exchange efficiency.

[0079] Combination Figure 1 and Figure 3 As shown, in some embodiments, the axial direction of the first manifold 400 is parallel to the width direction of the flat tube body 100, and the flat tube bodies 100 are spaced apart along the axial direction of the first manifold 400.

[0080] By aligning the axial direction of the manifold with the width direction of the flat tube body 100, the fluid can be distributed more evenly to the inlet of each flat tube body 100.

[0081] Multiple flat tube bodies 100 are spaced apart along the axial direction of the first manifold 400, so the flat tube bodies 100 do not contact each other, and heat is not directly transferred between them. This helps to reduce heat loss and the risk of local overheating. Furthermore, the spacing design can reduce the transmission of mechanical stress caused by thermal expansion, thereby extending the service life of the equipment.

[0082] Furthermore, the flat tube bodies 100 are distributed at intervals and are independent of each other. When a flat tube body 100 has a problem, it is not necessary to disassemble the entire heat exchanger or other flat tubes. Only the single flat tube body 100 with the problem needs to be replaced, which improves the maintainability of the equipment and makes the maintenance process faster and more economical.

[0083] Combination Figures 3 to 6As shown, in some embodiments, the flat tube body 100 is provided with a plurality of flow channels 110, which are arranged at intervals in the width direction of the flat tube body 100 and the extension direction of the flow channels 110 is parallel to the length direction of the flat tube body 100; a first heat conduction part 200 is provided at both ends of the flat tube body 100 in the width direction.

[0084] By adding first heat conduction sections 200 at both ends of the flat tube body 100, it is equivalent to adding additional structures that contact the inner tank liner 600 at both ends of the flat tube body 100 in the width direction. Although the direct contact area between the flat tube body 100 and the inner tank liner 600 remains unchanged, the first heat conduction sections 200 provide additional contact area, thereby increasing the contact area between a single flat tube body 100 and the surface of the inner tank liner 600.

[0085] Heat transfer efficiency is directly proportional to the contact area. Increasing the contact area can reduce the thermal resistance in the heat transfer path, allowing more heat to be quickly transferred to the inner tank 600, thus improving the heat exchange efficiency.

[0086] For example, the first heat conduction part 200 is a fin. Fins are a common heat conduction component with high heat transfer efficiency. By increasing the surface area, fins improve the efficiency of heat dissipation and transfer, effectively transferring heat from the flat tube to the inner tank 600 and ultimately to the water.

[0087] Combination Figures 4 to 6 As shown, in some embodiments, in the width direction of the flat tube body 100, the first heat conduction portion 200 has a first end 210 and a second end 220 disposed opposite to each other, the first end 210 being connected to the flat tube body 100; from the first end 210 of the first heat conduction portion 200 to the second end 220 of the first heat conduction portion 200, the cross-sectional area of ​​the first heat conduction portion 200 decreases.

[0088] The first end 210 of the first heat conduction section 200 is connected to the flat tube body 100, which provides structural stability and ensures that heat is effectively transferred from the flat tube body 100 to the first heat conduction section 200, and then from the first heat conduction section 200 to the water inside the water tank liner 600, thus improving the heat transfer efficiency.

[0089] The second end 220 extends outward along the width direction of the flat tube body 100.

[0090] In this design, both the first end 210 and the second end 220 of the first heat conduction section 200 are in contact with the surface of the inner tank 600, and the portion between the first end 210 and the second end 220 is also in contact with the surface of the inner tank 600. Thus, without changing the structure of the flat tube body 100 itself, the contact area between the flat tube body 100 and the surface of the inner tank 600 can be increased.

[0091] From the first end 210 to the second end 220 of the first heat conduction section 200, the cross-sectional area of ​​the first heat conduction section 200 decreases, so the cross-section of the first heat conduction section 200 as a whole has a triangular or approximately triangular structure.

[0092] For example, in combination Figure 3 As shown, the cross-section of the first heat conduction part 200 may have two straight sides and one inclined side. One straight side is located at the first end 210 and is connected to the flat tube body 100. The other straight side faces the inside of the flat tube body 100 and is used to contact the surface of the water tank inner liner 600. The inclined side connects the two straight sides. The cross-section of the first heat conduction part 200 is triangular in shape.

[0093] Combination Figure 4 As shown, in some embodiments, the cross-section of the first heat conduction part 200 may have two straight sides and one arc-shaped side. One straight side is located at the first end 210 and is connected to the flat tube body 100. The other straight side faces the inside of the flat tube body 100 and is used to contact the surface of the water tank inner liner 600. The arc-shaped side connects the two straight sides and protrudes towards the two straight sides. The cross-section of the first heat conduction part 200 is approximately triangular in shape.

[0094] Combination Figure 5 As shown, in some embodiments, the cross-section of the first heat conduction part 200 may have two straight sides and one curved side, one of which is located at the first end 210 and connected to the flat tube body 100, and the other straight side faces the inside of the flat tube body 100 and is used to contact the surface of the water tank inner liner 600. The curved side connects the two straight sides, and the cross-section of the first heat conduction part 200 is approximately triangular in shape.

[0095] Combination Figure 6 As shown, the cross-section of the first heat conduction part 200 may have two straight edges and one broken edge. One straight edge is located at the first end 210 and is connected to the flat tube body 100. The other straight edge faces the inside of the flat tube body 100 and is used to contact the surface of the water tank inner liner 600. The broken edge connects the two straight edges. The cross-section of the first heat conduction part 200 is approximately triangular in shape.

[0096] Understandably, the first heat conduction section 200 with a gradually decreasing cross-sectional area can reduce the amount of material used and help optimize the heat transfer path, so that heat can be transferred more concentratedly from the wide end to the narrow end, reducing heat loss during the transfer process and improving heat transfer efficiency.

[0097] Combination Figures 7 to 10 As shown, in some embodiments, at least one second heat conduction portion 300 is provided between a plurality of flow channels 110 in the width direction of the flat tube body 100.

[0098] Understandably, by setting a second heat conduction section 300 between the flow channels 110 based on the original flow channel 110 arrangement, it is equivalent to increasing the distance between the two flow channels 110 on both sides of the second heat conduction section 300.

[0099] Meanwhile, the second heat conduction section 300 can serve as a bridge for heat transfer. The heat of the refrigerant in the flow channels 110 located on both sides of the second heat conduction section 300 can be transferred to the second heat conduction section 300, so that the heat can be evenly distributed between the flow channels 110 through the second heat conduction section 300, thereby exchanging heat with the inner tank 600 to heat the water in the inner tank 600.

[0100] This configuration effectively increases the contact area between the flat tube body 100 and the inner tank 600, thereby increasing the overall contact area between the heat exchanger and the surface of the inner tank 600. This helps reduce the thermal resistance of heat transfer from the surface of the inner tank 600 to the water inside the inner tank 600, thus improving heat exchange efficiency.

[0101] Understandably, for a single flat tube body 100, increasing the number of flow channels 110 can improve the efficiency of the heat exchanger because more flow channels 110 provide a larger surface area for heat transfer. This can improve the flow characteristics of the fluid, reduce flow resistance, and increase the heat transfer rate.

[0102] However, increasing the number of flow channels 110 usually leads to an increase in the volume of the flat tube. Given the limited surface area of ​​the inner tank liner 600, the limited space cannot accommodate too many or too large flat tubes. Therefore, the contact area between the flat tube and the inner tank liner 600 remains limited. Furthermore, increasing the number of flow channels 110 also complicates the manufacturing process of the flat tube.

[0103] With a limited surface area of ​​600mm in the inner tank, reducing the number of flat tubes can lower manufacturing complexity and cost, but may limit the improvement of heat exchange efficiency.

[0104] Understandably, with the width of the flat tube body 100 remaining unchanged, the second heat conduction section 300 will occupy part of the original flow channel 110, and the number of flow channels 110 will be reduced, which can reduce the complexity of flat tube manufacturing and assembly.

[0105] Meanwhile, the second heat conduction section 300 can serve as a bridge for heat transfer. The heat of the refrigerant in the flow channels 110 located on both sides of the second heat conduction section 300 can be transferred to the second heat conduction section 300, so that the heat can be evenly distributed between the flow channels 110 through the second heat conduction section 300.

[0106] Therefore, even with a reduction in the number of flow channels 110, the second heat conduction part 300 can ensure the uniform distribution of heat throughout the flat tube while keeping the width of the flat tube body 100 unchanged, thus reducing the potential for local overheating or cooling problems caused by the reduction in the number of flow channels 110 and maintaining the overall heat exchange efficiency.

[0107] For example, in the width direction of the flat tube body 100, the width of each second heat conduction section 300 is no more than 15% of the total width of the flat tube body 100. By limiting the width of the second heat conduction section 300, it can be ensured that the second heat conduction section 300 provides sufficient heat transfer path between the flow channels to optimize heat transfer, avoid the situation where heat cannot be transferred to the middle of the second heat conduction section 300, and ensure uniform distribution of heat in the width direction of the flat tube body 100.

[0108] For example, the second heat conduction section 300 is a fin. Fins are a common heat conduction component with high heat transfer efficiency. By increasing the surface area, fins improve the efficiency of heat dissipation and transfer, effectively transferring heat between the flow channels 110 and to the inner tank 600, ultimately achieving water heating.

[0109] Combination Figure 7 As shown, in some embodiments, the cross-sectional area of ​​the middle part of the second heat conduction part 300 is smaller than the cross-sectional area of ​​the end part of the second heat conduction part 300, with the plane perpendicular to the length direction of the flat tube body 100 as the cross-section.

[0110] Specifically, the second heat conduction section 300 can be two structures with the same or similar shape as the first heat conduction section 200 connected together, disposed between the flow channels 110, and located in the middle of the width direction of the flat tube body 100, so as to realize the transfer of heat between the flow channels 110.

[0111] At the same time, the second heat conduction part 300 also comes into contact with the surface of the inner tank 600 to transfer heat to the inner tank 600, thereby heating the water.

[0112] In some embodiments, within a cross-section along the width direction of the flat tube body 100, the second heat conduction portion 300 has a contact surface 330, and a first inclined surface 310 and a second inclined surface 320 connected thereto; the contact surface 330 faces the inner side of the flat tube body 100 and is used to contact the outer wall of the water tank inner liner 600; the first inclined surface 310 and the second inclined surface 320 face the outer side of the flat tube body 100; from the end of the second heat conduction portion 300 to the middle of the second heat conduction portion 300, the first inclined surface 310 and the second inclined surface 320 gradually extend toward the inner side of the flat tube body 100.

[0113] Understandably, the contact surface 330 ensures stable contact with the inner tank 600, while the inclined surface design helps to guide heat more effectively from the flow channels 110 on both sides of the second heat conduction section 300 to the contact surface 330, optimizing the heat transfer path.

[0114] By oriented the contact surface 330 inward and making direct contact with the inner liner, heat can be transferred more directly and efficiently from the flat tube to the inner liner. This direct contact reduces thermal resistance and improves heat transfer efficiency.

[0115] The inclined surface gradually extends inward from the end to the middle, which helps to concentrate and guide heat flow, allowing heat to be transferred more efficiently from the end to the middle. This design reduces thermal resistance in the heat transfer path and improves the overall heat transfer efficiency of the second heat conduction section 300.

[0116] Specifically, by controlling the geometry of the second heat conduction section 300, the heat exchanger can improve heat transfer efficiency without increasing material usage. This helps the heat exchanger to be more efficient and energy-saving when reaching the preset water temperature, while reducing heat loss during the transfer process.

[0117] Combination Figure 7 As shown, in some embodiments, in the width direction of the flat tube body 100, the first heat conduction portion 200 near the first inclined surface 310 has a third inclined surface 230, which is parallel to the second inclined surface 320; the first heat conduction portion 200 near the second inclined surface 320 has a fourth inclined surface 240, which is parallel to the first inclined surface 310.

[0118] Understandably, the second heat conduction part 300 may include a first part and a second part connected together, the first part being close to the first heat conduction part 200 at the first end in the width direction of the flat tube body 100, and the second part being close to the first heat conduction part 200 located at the second end in the width direction of the flat tube body 100.

[0119] The first part has a first inclined surface, and the first heat conduction part 200 located at the second end of the width direction of the flat tube body 100 has a fourth inclined surface 240. The fourth inclined surface 240 is parallel to the first inclined surface 310. Therefore, the first part and the first heat conduction part 200 located at the second end of the width direction of the flat tube body 100 have the same or approximately the same shape.

[0120] The second part has a second inclined surface 320, and the first heat conduction part 200 located at the first end of the width direction of the flat tube body 100 has a third inclined surface 230. The third inclined surface 230 is parallel to the second inclined surface 320. Therefore, the second part and the first heat conduction part 200 located at the first end of the width direction of the flat tube body 100 have the same or approximately the same shape.

[0121] By setting the first part to have the same or approximately the same shape as the first heat conduction part 200 at the second end of the width direction of the flat tube body 100, and setting the second part to have the same or approximately the same shape as the first heat conduction part 200 at the first end of the width direction of the flat tube body 100, this symmetrical and similar setting can simplify the manufacturing and assembly process and reduce manufacturing costs and complexity.

[0122] Combination Figure 8 As shown, in some other embodiments, within the cross-section of the flat tube body 100 along the width direction, the second heat conduction portion 300 has a contact surface 330 and an outer plane 340; the contact surface 330 faces the inner side of the flat tube body 100 and is used to contact the outer wall of the water tank inner liner 600; the outer plane 340 faces the outer side of the flat tube body 100 and is recessed relative to the outer surface.

[0123] With the contact surface 330 facing inward and in direct contact with the inner liner, heat can be transferred more directly and efficiently from the flat tube body 100 to the inner liner. This direct contact reduces thermal resistance and improves heat transfer efficiency.

[0124] Understandably, since the outer plane 340 is recessed relative to the outer surface, the second heat conduction part 300 is a thin sheet structure disposed between the flow channels 110.

[0125] By setting the second heat conduction part 300 as a thin sheet structure, the structure is relatively simple, easy to process and assemble, and can also achieve efficient heat transfer.

[0126] Combination Figure 9 and Figure 10 As shown, in some embodiments, there are multiple second heat conduction sections 300; multiple second heat conduction sections 300 are spaced apart in the width direction of the flat tube body 100, and multiple second heat conduction sections 300 can divide multiple flow channels 110 into multiple equal parts.

[0127] For example, there are two second heat conduction sections 300; the two second heat conduction sections 300 are arranged at intervals in the width direction of the flat tube body 100, and the two second heat conduction sections 300 can divide the multiple flow channels 110 into three equal parts.

[0128] Understandably, by providing two second heat conduction sections 300 in the width direction of the flat tube body 100, the number of flow channels 110 can be further reduced, thereby further reducing the complexity of flat tube manufacturing and assembly.

[0129] Meanwhile, the second heat conduction part 300 can serve as a bridge for heat transfer. The heat of the refrigerant in the flow channels 110 located on both sides of the second heat conduction part 300 can be transferred to the second heat conduction part 300, so that the heat can be evenly distributed between the flow channels 110 through the second heat conduction part 300, thereby maintaining the overall heat exchange efficiency.

[0130] In some embodiments, the number of second heat conduction parts 300 may be greater than two, as long as a uniform heat distribution can be ensured in the width direction of the flat tube body 100.

[0131] In summary, the heat exchanger provided in this application embodiment has a first heat conduction part 200 at both ends of the flat tube body 100 in the width direction, which can increase the contact area between the single flat tube body 100 and the surface of the water tank inner liner 600, reduce the heat transfer resistance of the surface of the water tank inner liner 600 to the water inside the water tank inner liner 600, and improve the heat exchange efficiency.

[0132] Furthermore, at least one second heat conduction section 300 is provided between the multiple flow channels 110 along the width direction of the flat tube body 100. With the width of the flat tube body 100 remaining constant, the number of flow channels 110 can be reduced, thereby lowering the complexity of flat tube manufacturing and assembly. Simultaneously, the second heat conduction section 300 achieves uniform heat distribution among the flow channels 110, reducing the impact of the reduced number of flow channels 110 on the uniformity of heat transfer. This ensures that even with a reduced number of flow channels 110, the heat exchanger can still effectively transfer heat, guaranteeing heat exchange efficiency.

[0133] The technical solutions of this application have been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it is readily understood by those skilled in the art that the scope of protection of this application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A heat exchanger, characterized in that, It includes multiple flat tube bodies (100), which are arranged sequentially along the axial direction of the inner liner (600) of the water tank; The flat tube body (100) has a plurality of flow channels (110) inside. The flow channels (110) are arranged at intervals in the width direction of the flat tube body (100), and the extension direction of the flow channels (110) is parallel to the length direction of the flat tube body (100). In the width direction of the flat tube body (100), at least one second heat conduction part (300) is provided between the plurality of flow channels (110).

2. The heat exchanger according to claim 1, characterized in that, Taking a plane perpendicular to the length direction of the flat tube body (100) as a cross section, the cross-sectional area of ​​the middle part of the second heat conduction part (300) is smaller than the cross-sectional area of ​​the end of the second heat conduction part (300).

3. The heat exchanger according to claim 2, characterized in that, The second heat conduction part (300) has a contact surface (330), and a first inclined surface (310) and a second inclined surface (320) connected to each other; The contact surface (330) faces the inner side of the flat tube body (100), and the contact surface (330) is used to contact the outer wall of the inner liner (600) of the water tank; The first inclined surface (310) and the second inclined surface (320) face outward from the flat tube body (100); From the end of the second heat conduction section (300) to the middle of the second heat conduction section (300), the first inclined surface (310) and the second inclined surface (320) extend toward the inside of the flat tube body (100).

4. The heat exchanger according to claim 1, characterized in that, The second heat conduction part (300) has a contact surface (330) and an outer plane (340); The contact surface (330) faces the inner side of the flat tube body (100), and the contact surface (330) is used to contact the outer wall of the inner liner (600) of the water tank; The outer plane (340) faces the outside of the flat tube body (100), and the outer plane (340) is recessed relative to the outer surface of the flat tube body (100).

5. The heat exchanger according to claim 1, characterized in that, The number of the second heat conduction parts (300) is multiple; In the width direction of the flat tube body (100), a plurality of second heat conduction portions (300) are spaced apart, and the plurality of second heat conduction portions (300) can divide the plurality of flow channels (110) into multiple equal parts.

6. The heat exchanger according to any one of claims 1-5, characterized in that, The flat tube body (100) has a first heat conduction part (200) at each end in the width direction.

7. The heat exchanger according to claim 6, characterized in that, In the width direction of the flat tube body (100), the first heat conduction part (200) has a first end (210) and a second end (220) disposed opposite to each other, and the first end (210) is connected to the flat tube body (100). From the first end (210) of the first heat conduction part (200) to the second end (220) of the first heat conduction part (200), the cross-sectional area of ​​the first heat conduction part (200) decreases.

8. The heat exchanger according to any one of claims 1-5, characterized in that, It also includes a first manifold (400) and a second manifold (500) arranged in parallel; The first end of the flat tube body (100) along its length is connected to the first manifold (400), and the second end of the flat tube body (100) along its length is connected to the second manifold (500).

9. The heat exchanger according to claim 8, characterized in that, The axial direction of the first manifold (400) is parallel to the width direction of the flat tube body (100), and the flat tube body (100) is distributed at intervals along the axial direction of the first manifold (400).

10. A heat pump water heater, characterized in that, Includes a water tank liner (600) and a heat exchanger as described in any one of claims 1-9; The heat exchanger includes a plurality of flat tube bodies (100), which abut against the outer wall of the inner liner of the water tank (600).

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