Heat exchanger and dishwasher

Abstract

A heat exchanger (100), comprising: a housing and a plurality of heat exchange tubes (20), wherein the housing is provided with first distribution grooves (31), first collection grooves (42) and a heat exchange space, the heat exchange space being provided between the first distribution grooves (31) and the first collection grooves (42); the plurality of heat exchange tubes (20) are arranged in the heat exchange space; first flow channels (110) for communicating the first distribution grooves (31) with the first collection grooves (42) are constructed in the heat exchange tubes (20); and second flow channels (120) that perform heat exchange with and match the first flow channels (110) are constructed outside the heat exchange tubes (20).

Description

Heat exchangers and dishwashers

[0001] Cross-reference to related applications

[0002] This application claims priority to the following Chinese patent applications filed on August 30, 2024: application number 202411218659.4, entitled "Heat Exchanger and Dishwasher"; application number 202422139051.4, entitled "Heat Exchanger and Dishwasher"; and application number 202411219028.4, entitled "Heat Exchanger and Dishwasher", all the contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of household appliance technology, and in particular to a heat exchanger and a dishwasher having the heat exchanger. Background Technology

[0004] Currently, the washing chamber can be connected to the water tank, thereby supplying water to the washing chamber. The heat exchanger can realize the heat exchange between the liquid in the washing chamber and the liquid in the water tank, thus realizing the recovery of waste heat of the liquid in the washing chamber.

[0005] In related technologies, heat exchangers are generally installed in water tanks. When the liquid in the washing chamber exchanges heat with the liquid in the water tank, there is cross-contamination between the heat exchange channels in the heat exchanger, which leads to water pollution.

[0006] Application content

[0007] One objective of this application is to provide a heat exchanger having independent first and second flow channels, ensuring that the water quality in the flow channels is not contaminated.

[0008] A heat exchanger according to an embodiment of this application includes: a shell and a plurality of heat exchange tubes. The shell is provided with a first diversion groove, a first confluence groove and a heat exchange space. The heat exchange space is disposed between the first diversion groove and the first confluence groove. The plurality of heat exchange tubes are disposed in the heat exchange space. A first flow channel is constructed inside the heat exchange tubes to connect the first diversion groove and the first confluence groove. A second flow channel is constructed outside the heat exchange tubes to cooperate with the first flow channel for heat exchange.

[0009] According to the heat exchanger of the present application embodiment, the first flow channel and the second flow channel can flow independently, which can prevent water from flowing between the flow channels and thus ensure that the water quality of the flow channels is not polluted.

[0010] In some embodiments, the heat exchanger further includes a first partition component and a second partition component, the first partition component and the second partition component being respectively disposed at both ends of the heat exchange space, and both ends of the plurality of heat exchange tubes passing through the first partition component and the second partition component respectively.

[0011] In some embodiments, the first partition component and the housing are integrally formed. The first partition component includes a first partition and a second partition, which extend along the width direction of the housing and are distributed along the length direction of the housing.

[0012] In some embodiments, the second partition assembly is an integral structure with the housing, and the second partition assembly includes a third partition and a fourth partition, which extend along the width direction of the housing and are distributed along the length direction of the housing.

[0013] In some embodiments, a first sealing groove is formed between the first separator and the second separator, and the housing has a first opening communicating with the first sealing groove for injecting adhesive into the first sealing groove.

[0014] In some embodiments, a second sealing groove is formed between the third partition and the fourth partition, and the housing is provided with a second opening communicating with the second sealing groove for injecting adhesive into the second sealing groove.

[0015] In some embodiments, the first partition component and the housing are separate structures, and the heat exchange tube is sealed to the first partition component and the housing through a sealing structure.

[0016] In some embodiments, the second partition assembly and the housing are separate structures, and the heat exchange tube is sealed to the second partition assembly and the housing through a sealing structure.

[0017] In some embodiments, the sealing structure includes a first sealing portion and a second sealing portion, wherein the heat exchange tube is sealed to the first partition assembly through the first sealing portion, and the second sealing portion is sealed to the housing.

[0018] In some embodiments, the second sealing portion includes a plurality of sealing protrusions that elastically abut against the housing.

[0019] In some embodiments, the first partition component is provided with a plurality of first notches, and the first end of the heat exchange tube passes through the first notch.

[0020] In some embodiments, the second partition component is provided with a plurality of third notches, and the second end of the heat exchange tube passes through the third notches.

[0021] In some embodiments, the first notch is clearance-fitted with the heat exchange tube.

[0022] In some embodiments, the third notch is clearance-fitted with the heat exchange tube.

[0023] In some embodiments, the heat exchange space is provided with a second diversion channel and a second confluence channel, the second diversion channel being connected to one end of the plurality of second channels, and the second confluence channel being connected to the other end of the plurality of second channels.

[0024] In some embodiments, the housing is provided with a first partition component and a second partition component, the first partition component being disposed between the first diversion channel and the second diversion channel, and the second partition component being disposed between the first confluence channel and the second confluence channel.

[0025] In some embodiments, the inner side of the housing is provided with a first protrusion, which is located between the first manifold and the second manifold, and the first protrusion protrudes relative to the bottom surface of the first manifold and the bottom surface of the second manifold.

[0026] In some embodiments, the housing includes a bottom shell and a cover plate, the cover plate covers the bottom shell, the bottom wall of the housing is provided with a second boss, the inner wall of the cover plate is provided with a protrusion, the protrusion and the second boss are opposite to each other in the assembly direction, and when the cover plate covers the housing, the protrusion abuts against the second boss.

[0027] In some embodiments, the second boss is provided with a positioning port, and the protrusion is provided with a positioning platform, the positioning platform extending into the positioning port.

[0028] In some embodiments, the bottom shell is an integral structure.

[0029] In some embodiments, one end of the housing is provided with a first water inlet and a second water inlet, and the other end of the housing is provided with a first water outlet and a second water outlet; the first flow channel connects the first water inlet and the first water outlet, and the second flow channel connects the second water inlet and the second water outlet.

[0030] In some embodiments, the first inlet and the first outlet are connected to the first diversion channel, the first flow channel and the first confluence channel.

[0031] In some embodiments, the second inlet and the second outlet are connected to the second diversion channel, the second flow channel and the second confluence channel.

[0032] In some embodiments, the heat exchanger further includes a mounting bracket and a sealing structure, and the housing has a receiving cavity; the mounting bracket is located at both ends of the heat exchange tube and is sealed to the heat exchange tube through the sealing element, the sealing element being sealed to the housing to divide the receiving cavity into a flow distribution cavity at both ends and a heat exchange cavity in the middle region, the flow distribution cavity communicating with the heat exchange tube and adapted to contain a first medium, the heat exchange cavity being adapted to contain a second medium, and the first medium exchanging heat with the second medium.

[0033] In some embodiments, the housing includes a bottom shell and a cover plate, the cover plate covering the bottom shell to define the accommodating cavity, and the bottom shell being provided with a first water inlet pipe and a first water outlet pipe communicating with the diversion cavity, and a second water inlet pipe and a second water outlet pipe communicating with the heat exchange cavity.

[0034] In some embodiments, the first water inlet pipe is disposed at one end of the bottom shell, and the first water outlet pipe is disposed at the other end of the bottom shell, and each is connected to one of the diversion chambers.

[0035] In some embodiments, a mounting groove is provided on the inner wall of the bottom shell, and at least a portion of the seal extends into the mounting groove to form a sealing connection with the bottom shell.

[0036] In some embodiments, a barrier pipe section is provided at one end of the second water inlet pipe and the second water outlet pipe that extends into the accommodating cavity. The barrier pipe section is connected to the fixing frame, passes through the diversion cavity, and communicates with the heat exchange cavity.

[0037] In some embodiments, the barrier pipe segment includes: a connecting plate and a mounting plate located on one side of the connecting plate, the connecting plate being connected to the second inlet pipe or the second outlet pipe, and the fixing bracket being installed between the mounting plate and the mounting groove.

[0038] In some embodiments, the mounting plate is provided with a positioning protrusion extending toward the mounting groove, and at least a portion of the seal is located within the positioning protrusion to seal the gap between the fixing bracket and the barrier pipe section.

[0039] In some embodiments, the fixing bracket is disposed on both sides of the width of the barrier tube segment, or on one side of the width of the barrier tube segment adjacent to the housing, and the fixing bracket is disposed on the other side of the barrier tube segment.

[0040] In some embodiments, the seal includes a first sealing portion and a second sealing portion, the heat exchange tube is sealed to the bracket through the first sealing portion, and the heat exchange assembly is sealed to the housing through the second sealing portion.

[0041] In some embodiments, the second sealing portion includes a plurality of sealing protrusions that elastically abut against the housing.

[0042] In some embodiments, a plurality of heat exchange tubes are arranged sequentially in the width direction of the heat exchanger within the accommodating cavity.

[0043] In some embodiments, the housing further includes a partition disposed on the cover plate or the bottom shell, and the partition is located between adjacent heat exchange components.

[0044] In some embodiments, the gaps between adjacent heat exchange tubes, the gap between the outermost heat exchange tube and the inner wall of the bottom shell, and the gap between the innermost heat exchange tube and the partition are the same.

[0045] In some embodiments, the housing includes a first water inlet pipe and a second water inlet pipe, the first water inlet pipe being connected to the first diversion channel; the second water inlet pipe passing through the first diversion channel being connected to the heat exchange space.

[0046] In some embodiments, the housing includes a first water outlet pipe and a second water outlet pipe, the first water outlet pipe being connected to the first confluence channel; the second water outlet pipe passing through the first confluence channel being connected to the heat exchange space.

[0047] In some embodiments, the heat exchange tubes extend along the length direction of the heat exchanger, and the plurality of heat exchange tubes are arranged side by side along the width direction of the heat exchanger.

[0048] In some embodiments, the plurality of heat exchange tubes are arranged at intervals along the width direction of the heat exchanger.

[0049] In some embodiments, the second flow channel has a dimension greater than 0.5 mm along the width direction of the heat exchanger.

[0050] In some embodiments, the wall thickness of the heat exchange tube is greater than 0.4 mm.

[0051] In some embodiments, the heat exchange tube is constructed as a microchannel tube with an equivalent diameter of 0.8 mm to 5 mm.

[0052] Another objective of this application is to propose a dishwasher.

[0053] The dishwasher according to an embodiment of this application includes: the aforementioned heat exchanger.

[0054] In some embodiments, the dishwasher further includes: a water cup and a water tank, the water cup being in communication with the diversion chamber of the heat exchanger; the water tank containing the washing medium and being in communication with the heat exchange chamber of the heat exchanger.

[0055] Another objective of this application is to provide a heat exchanger.

[0056] A heat exchanger according to an embodiment of this application includes: a shell and a heat exchange assembly. The shell has a receiving cavity, and the heat exchange assembly is disposed in the receiving cavity. The heat exchange assembly includes: a fixing frame, a heat exchange tube, and a sealing element. The fixing frame is located at both ends of the heat exchange tube and is sealed to the heat exchange tube through the sealing element. The sealing element is sealed to the shell to divide the receiving cavity into a flow distribution cavity located at both ends and a heat exchange cavity located in the middle region. The flow distribution cavity is in communication with the heat exchange tube and is adapted to contain a first medium. The heat exchange cavity is adapted to contain a second medium, and the first medium and the second medium exchange heat.

[0057] According to the embodiments of this application, the heat exchanger with a fixed frame and heat exchange tubes are connected by a sealing element, which can improve the sealing performance of the heat exchange components, improve the stability and reliability of the heat exchange components within the shell, and the sealing element is also used to divide the flow distribution chamber and the heat exchange chamber, and to achieve a seal between the flow distribution chamber and the heat exchange chamber. The sealing element is constructed as a reusable structure, which can simplify the heat exchanger structure, improve the space occupation of the heat exchanger, realize the miniaturization and compact design of the heat exchanger, and reduce the cost of the heat exchanger. At the same time, it can improve the sealing performance of the heat exchanger, prevent crossflow between the first medium and the second medium, improve the working stability and reliability, and improve the user experience.

[0058] In some embodiments, the housing includes: a housing body and a cover plate, the cover plate covering the housing body to define the receiving cavity, and the housing body being provided with a first inlet pipe and a first outlet pipe communicating with the diversion cavity, and a second inlet pipe and a second outlet pipe communicating with the heat exchange cavity.

[0059] In some embodiments, the first inlet pipe is disposed at one end of the shell body, and the first outlet pipe is disposed at the other end of the shell body, and are respectively connected to one of the diversion chambers.

[0060] In some embodiments, an installation groove is provided on the inner wall of the shell body, and at least a portion of the seal extends into the installation groove to form a sealed connection with the shell body.

[0061] In some embodiments, a barrier pipe section is further provided on one end of the second inlet pipe and the second outlet pipe that extends into the accommodating cavity. The barrier pipe section is connected to the fixing frame, passes through the diversion cavity, and communicates with the heat exchange cavity.

[0062] In some embodiments, the barrier pipe segment includes: a connecting plate and a mounting plate located on one side of the connecting plate, the connecting plate being connected to the second inlet pipe or the second outlet pipe, and the fixing bracket being installed between the mounting plate and the mounting groove.

[0063] In some embodiments, the mounting plate is provided with a positioning protrusion extending toward the mounting groove, and at least a portion of the seal is located within the positioning protrusion to seal the gap between the fixing bracket and the barrier pipe section.

[0064] In some embodiments, the fixing bracket is disposed on both sides of the width of the barrier tube segment, or on one side of the width of the barrier tube segment adjacent to the housing, and the fixing bracket is disposed on the other side of the barrier tube segment.

[0065] According to some embodiments of this application, the sealing element includes a first sealing portion and a second sealing portion, the heat exchange tube and the fixing frame are sealed together through the first sealing portion, and the heat exchange assembly and the housing are sealed together through the second sealing portion.

[0066] In some embodiments, the second sealing portion includes a plurality of sealing protrusions that elastically abut against the housing.

[0067] In some embodiments, there are multiple heat exchange components, which are arranged sequentially in the width direction of the heat exchanger within the accommodating cavity.

[0068] In some embodiments, the housing further includes a partition disposed on the cover plate or the housing body, and the partition is located between adjacent heat exchange components.

[0069] In some embodiments, the gaps between adjacent heat exchange tubes, the gap between the outermost heat exchange tube and the inner wall of the shell body, and the gap between the innermost heat exchange tube and the partition are the same.

[0070] In some embodiments, the heat exchange tube is constructed as a microchannel tube with an equivalent diameter of 0.8 mm to 5 mm.

[0071] In some embodiments, the heat exchanger has a length of 150mm to 280mm, a width of 20mm to 200mm, and a height of 6mm to 30mm.

[0072] Another objective of this application is to propose a dishwasher.

[0073] A dishwasher according to an embodiment of this application includes: a heat exchanger, a water cup, and a water tank. The water cup is connected to the diversion chamber of the heat exchanger, and the water tank contains a washing medium and is connected to the heat exchange chamber of the heat exchanger. Attached Figure Description

[0074] Figure 1 is a schematic diagram of the heat exchanger structure in some embodiments of this application;

[0075] Figure 2 is an exploded view of a heat exchanger in some embodiments of this application;

[0076] Figure 3 is a schematic diagram of the heat exchanger structure in some embodiments of this application (cover plate not shown);

[0077] Figure 4 is a cross-sectional view of a heat exchanger in some embodiments of this application;

[0078] Figure 5 is a schematic diagram of the cover plate in some embodiments of this application;

[0079] Figure 6 is a schematic diagram of the heat exchanger in some other embodiments of this application;

[0080] Figure 7 is a partial structural schematic diagram of the heat exchanger in some other embodiments of this application;

[0081] Figure 8 is an exploded schematic diagram of a heat exchanger according to some other embodiments of this application;

[0082] Figure 9 is a partial cross-sectional schematic diagram of a heat exchanger according to some other embodiments of this application;

[0083] Figure 10 is a schematic diagram of heat exchange components of some other embodiments of this application;

[0084] Figure 11 is a cross-sectional schematic diagram of a heat exchanger according to some other embodiments of this application.

[0085] Reference numerals: 100, heat exchanger; 10, bottom shell; 111, first boss; 112, second boss; 105, positioning port; 113, cover plate; 121, first opening; 122, second opening; 123, protrusion; 124, positioning platform; 20, heat exchange tube; 201, first inlet; 202, second inlet; 203, first outlet; 204, second outlet; 21, first inlet pipe; 22, second inlet pipe; 23, first outlet pipe; 24, second outlet pipe; 210, fixing frame; 110, first flow channel; 120, second flow channel; 31, first diversion channel; 32, second diversion channel; 42, first confluence channel; 44 10a. Second manifold; 10b. Raised strip; 10a. First partition assembly; 10b. Second partition assembly; 11. First partition; 101. First notch; 12. Second partition; 102. Second notch; 13. Third partition; 103. Third notch; 14. Fourth partition; 104. Fourth notch; 17. Mounting groove; 18. Barrier pipe section; 181. Connecting plate; 182. Mounting plate; 183. Positioning protrusion; 19. Partition; 401. First sealing groove; 402. Second sealing groove; 43. Sealing structure; 431. First sealing part; 432. Second sealing part; a. Diverting chamber; b. Heat exchange chamber; Width direction X. Detailed Implementation

[0086] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0087] Referring to Figures 1 and 2, the heat exchanger 100 according to an embodiment of this application includes: a shell and a plurality of heat exchange tubes 20. The shell is provided with a first diversion groove 31, a first confluence groove 42 and a heat exchange space. The heat exchange space is located between the first diversion groove 31 and the first confluence groove 42. The heat exchange medium can enter the heat exchange space from the first diversion groove 31 for heat exchange and then be discharged from the first confluence groove 42, thereby achieving the heat exchange effect.

[0088] Furthermore, referring to Figures 1 to 3, multiple heat exchange tubes 20 are arranged in the heat exchange space. A first flow channel 110 is constructed inside each heat exchange tube 20, connecting the first diversion channel 31 and the first confluence channel 42. A second flow channel 120 is constructed outside each heat exchange tube 20 to cooperate with the first flow channel 110 for heat exchange. In other words, the heat exchanger 100 has two flow channels, allowing the first heat exchange medium and the second heat exchange medium to enter simultaneously. The first flow channel 110 and the second flow channel 120 can cooperate with each other, thereby improving the heat exchange effect and energy utilization. In addition, the first diversion channel 31 and the first confluence channel 42 can connect to the first flow channel 110, thus separating the first flow channel 110 from the second flow channel 120, allowing independent flow between the two channels. This prevents cross-contamination between the channels and ensures that the water quality in the channels is not contaminated.

[0089] Referring to Figure 2, in some embodiments of this application, the heat exchanger 100 includes a first partition component 10a and a second partition component 10b. The first partition component 10a and the second partition component 10b are respectively disposed at both ends of the heat exchange space. The two ends of a plurality of heat exchange tubes 20 are respectively inserted through the first partition component 10a and the second partition component 10b. Thus, the first partition component 10a can separate the first diversion groove 31 from the second flow channel 120 constructed outside the heat exchange tubes 20, and the second partition component 10b can separate the first confluence groove 42 from the second flow channel 120 constructed outside the heat exchange tubes 20, thereby realizing the separation between the first flow channel 110 and the second flow channel 120. Specifically, the first partition component 10a is an integral structure with the shell. The first partition component 10a is provided with a first partition 11 and a second partition 12. The first partition 11 and the second partition 12 extend along the width direction of the shell (see the left-right direction in Figure 2) and are opposite each other along the length direction of the shell (see the front-back direction in Figure 2).

[0090] The heat exchange space is provided with a second diversion channel 32 and a second confluence channel 44. The second diversion channel 32 connects to one end of a plurality of second flow channels 120, and the second confluence channel 44 connects to the other end of a plurality of second flow channels 120. That is, the two ends of the second flow channels 120 are provided with the second diversion channel 32 and the second confluence channel 44 to realize diversion and confluence, which is beneficial to further separate the second flow channels 120 from the first flow channel 110 and to improve the heat exchange effect of the heat exchange medium. The first separation component 10a is disposed between the first diversion channel 31 and the second diversion channel 32, and the second separation component 10b is disposed between the first confluence channel 42 and the second confluence channel 44.

[0091] Furthermore, referring to Figure 2, the inner side of the shell is provided with a first boss 111, which is located between the first confluence channel 42 and the second confluence channel 44. The first boss 111 protrudes relative to the bottom surface of the first confluence channel 42 and the bottom surface of the second confluence channel 44, which can provide support for the heat exchange tube 20, improve the structural stability of the heat exchange space, and also improve the overall structural strength of the shell.

[0092] In some embodiments of this application, the second partition component 10b is integrally formed with the housing. The second partition component 10b is provided with a third partition 13 and a fourth partition 14, which extend along the width direction of the housing and are opposite to each other along the length direction of the housing. The third partition 13 and the fourth partition 14 are spaced apart between the first manifold 42 and the second manifold 44. The third partition 13 and the fourth partition 14 can separate the first manifold 42 and the second manifold 44 to achieve independent flow in the first flow channel 110 and the second flow channel 120.

[0093] The first separator 11 and the second separator 12 are arranged at an interval between the first diversion channel 31 and the second diversion channel 32. Thus, the first separator 11 and the second separator 12 can separate the first diversion channel 31 and the second diversion channel 32 to achieve independent flow of the first flow channel 110 and the second flow channel 120.

[0094] Furthermore, to improve the separation effect between the first diversion groove 31 and the second diversion groove 32, and between the first confluence groove 42 and the second confluence groove 44, a first sealing groove 401 is constructed between the first separator 11 and the second separator 12. The housing has a first opening 121 communicating with the first sealing groove 401 for injecting adhesive into the first sealing groove 401. A second sealing groove 402 is constructed between the third separator 13 and the fourth separator 14, and the housing has a second opening 122 communicating with the second sealing groove 402 for injecting adhesive into the second sealing groove 402. Achieving a sealing effect by filling the sealing groove with adhesive reduces manufacturing difficulty, decreases the space occupied by the sealing component structure, and the filling method reduces the mating gap, thus improving the sealing effect.

[0095] Referring to Figure 2, for example, in practical applications, the first partition 11 can be one side wall of the first diversion channel 31, and the second partition 12 can be one side wall of the second diversion channel 32. Adhesive is injected between the two oppositely arranged side walls, which can simplify the structure of the heat exchanger 100.

[0096] Referring to Figures 6 and 7, in some embodiments of this application, the first partition component 10a and the shell are separate structures, and the heat exchange tube 20 is sealed to the first partition component 10a and the shell through a sealing structure 43; the second partition component 10b and the shell are separate structures, and the heat exchange tube 20 is sealed to the second partition component 10b and the shell through a sealing structure 43.

[0097] The sealing structure 43 can be constructed as a rubber-coated structure. The partition component and the heat exchange tube 20 can be set in a mold, and liquid rubber is injected into the mold to fix and seal the heat exchange tube 20 and the partition component. It can also seal the rubber to prevent the soft rubber from overflowing during the secondary rubber coating process. After the secondary rubber coating is completed, the first partition component 10a, the second partition component 10a and the heat exchange tube 20 can be further assembled into the shell. During this process, the outer periphery (i.e., the side, bottom and top surfaces) of the sealing structure 43 can be elastically deformed and sealed by extrusion pressure.

[0098] Furthermore, the sealing structure 43 includes a first sealing part 431 and a second sealing part 232. The heat exchange tube 20 and the partition assembly are sealed together through the first sealing part 431, and the second sealing part 232 is sealed together with the housing. The second sealing part 232 includes a plurality of sealing protrusions that elastically abut against the housing.

[0099] Specifically, the first sealing part 431 and the second sealing part 432 can be obtained in a first-stage and a second-stage encapsulation process, respectively. The first sealing part 431 is obtained through the first encapsulation process, achieving a fixed connection between the heat exchange tube 20 and the partition assembly. The partition assembly can then be used for sealing to prevent the soft adhesive from overflowing during the second encapsulation process. During the second encapsulation process, the second sealing part 432 is formed by wrapping around the outer periphery of the partition assembly. The second sealing part 432 elastically abuts against the shell to achieve a seal between the heat exchange assembly 20 and the shell. As shown in Figures 6 and 7, the second sealing part 432 further includes multiple sealing protrusions that elastically abut against the shell.

[0100] Furthermore, referring to Figures 2 and 3, the first partition 11 has multiple first notches 101, and the second partition 12 has multiple second notches 102. The multiple first notches 101 and multiple second notches 102 are arranged opposite to each other. The first end of the heat exchange tube 20 passes through the first notches 101 and the second notches 102 to connect to the first diversion channel 31. The third partition 13 has multiple third notches 103, and the fourth partition 14 has multiple fourth notches 104. The multiple third notches 103 and multiple fourth notches 104 are arranged opposite to each other. The second end of the multiple heat exchange tubes 20 passes through the third notches 103 and the fourth notches 104 to connect to the first confluence channel 42. That is to say, the two ends of the multiple heat exchange tubes 20 pass through the second diversion channel 32 and the second confluence channel 44 respectively. The sealing structure can form a seal between the heat exchange tubes 20 and the shell, so that the medium in the second flow channel 120 will not enter the second diversion channel 32 and the first confluence channel 42 from the gap between the heat exchange tubes 20 and the shell. The heat exchange tube 20 has its opposite ends inserted through the first notch 101 and the third notch 103, respectively. Therefore, the first notch 101 and the third notch 103 can be configured to fit the ends of the heat exchange tube 20 to improve the connection effect. For example, referring to Figure 2, the heat exchange tube 20 is a microchannel flat tube, and the first notch 101 and the third notch 103 can be configured as a comb-like structure to conform to the flat tube.

[0101] In some embodiments of this application, the first notch 101 is clearance-fitted with the heat exchange tube 20, with a gap of less than 0.1 mm. The second notch 102 is clearance-fitted with the heat exchange tube 20, with a gap of less than 0.1 mm. The third notch 103 is clearance-fitted with the heat exchange tube 20, with a gap of less than 0.1 mm. The fourth notch 104 is clearance-fitted with the heat exchange tube 20, with a gap of less than 0.1 mm. Specifically, the above gaps can prevent the filling sealant from flowing through, so that the sealant forms a tight wrapping constraint relationship between the separator and the heat exchange tube 20, thereby improving the sealing effect.

[0102] Referring to Figure 3, in some embodiments of this application, the shell and heat exchange tubes 20 can be assembled first, and then adhesive can be injected into the sealing groove to achieve a seal between the shell and the heat exchange tubes 20. Specifically, the shell is provided with a first sealing groove 401 and a second sealing groove 402. Multiple heat exchange tubes 20 pass through the first sealing groove 401, and the adhesive for sealing is filled in the first sealing groove 401; multiple heat exchange tubes 20 pass through the second sealing groove 402, and the adhesive for sealing is filled in the second sealing groove 402. Thus, by setting the first sealing groove 401 and the second sealing groove 402, and passing the heat exchange tubes 20 through the first sealing groove 401 and the second sealing groove 402, adhesive can be filled into the sealing groove. The sealing groove can define the setting position of the sealing element and can also limit the filling capacity of the sealing element, so that the sealing element can fully fill the gap between the shell and the heat exchange tubes 20 in the sealing groove, improve the sealing effect, and facilitate the control of the filling amount of the sealing element. During assembly, the heat exchange tube 20 can be assembled onto the shell first, and the colloid or glue can be filled into the first sealing groove 401 and the second sealing groove 402 respectively. In this way, the colloid or glue can wrap around the shell and the heat exchange tube 20 in the first sealing groove 401 and the second sealing groove 402, thereby forming a seal.

[0103] In some embodiments of this application, the heat exchange tube 20 extends along the length direction of the heat exchanger 100, which can increase the length of the heat exchange tube 20 and improve the heat exchange effect. Multiple heat exchange tubes 20 are arranged side by side along the width direction of the heat exchanger 100, which can provide multiple heat exchange tubes 20 in the shell and improve efficiency.

[0104] More specifically, in some embodiments of this application, a plurality of heat exchange tubes 20 are arranged at intervals along the width direction of the heat exchanger 100, and the distance between two adjacent heat exchange tubes 20 is greater than 0.5 mm.

[0105] In addition, the multiple heat exchange tubes 20 are arranged at intervals, so that the first flow channel 110 and the second flow channel 120 can be distributed at intervals, which can improve the structural compactness of the heat exchange space and improve the space utilization rate.

[0106] More specifically, one end of each of the multiple first flow channels 110 can be connected to a first diversion channel 31, and the other end can be connected to a first confluence channel 42. Thus, after the first heat exchange medium enters from the first diversion channel 31 at the inlet end, it can flow into the multiple first flow channels 110. After heat exchange within the multiple first flow channels 110, the first heat exchange medium can collect in the first confluence channel 42 and then be discharged, ensuring that the first heat exchange medium can fully contact the heat exchange space to improve the heat exchange effect. Similarly, one end of each of the multiple second flow channels 120 can be connected to the multiple second diversion channels 32, and the other end can be connected to a second confluence channel 44. Thus, after the second heat exchange medium enters from the second diversion channel 32 at the inlet end, it can enter the multiple second flow channels 120. After heat exchange within the multiple second flow channels 120, the second heat exchange medium can collect in the second confluence channel 44 and then be discharged, ensuring that the second heat exchange medium can fully contact the heat exchange space to improve the heat exchange effect.

[0107] In some embodiments of this application, the first flow channel 110 and the second flow channel 120 are spaced apart along the width direction of the housing, and the first diversion groove 31 and the second diversion groove 32 extend along the width direction and are distributed along the length direction of the housing. Thus, the first diversion groove 31 can communicate with one end of the first flow channel 110 arranged along the width direction, and the second diversion groove 32 can communicate with one end of the second flow channel 120 arranged along the width direction. Similarly, the first confluence groove 42 and the second confluence groove 44 extend along the width direction and are distributed along the length direction of the housing, so that the other ends of the first flow channel 110 and the second flow channel 120 can communicate with the first confluence groove 42 and the second confluence groove 44. The first diversion channel 31 and the second diversion channel 32 are distributed along the length of the shell and extend along the width. The first confluence channel 42 and the second confluence channel 44 are distributed along the length of the shell and extend along the width. This not only achieves the effect of diversion and confluence at the opposite ends of the first flow channel 110 and the second flow channel 120, but also improves the compactness of the arrangement, which is conducive to increasing the extension length of the flow channel and improving the heat exchange effect.

[0108] In conjunction with the foregoing, a second flow channel 120 is constructed between two adjacent heat exchange tubes 20. Therefore, the distance between the two heat exchange tubes 20 determines the flow rate of the second flow channel 120. A distance greater than 0.5 mm between the two heat exchange tubes 20 facilitates medium flow. When the heat exchanger 100 is applied to a dishwasher, the second flow channel 120 can be used to circulate washing water. The washing water may contain impurities; therefore, increasing the cross-sectional area of ​​the second flow channel 120 facilitates wastewater flow and discharge. Referring to Figure 4, the distance between two adjacent heat exchange tubes 20 is L, which can be 0.6 mm, 0.8 mm, or 1 mm, etc.

[0109] In some embodiments of this application, the wall thickness of the heat exchange tube 20 is greater than 0.4 mm, which can improve the structural stability of the heat exchange tube 20. For example, the wall thickness of the heat exchange tube 20 can be 0.5 mm or 0.6 mm, etc.

[0110] In some embodiments, the heat exchanger 100 may include a first seal and a second seal. The first seal is sealed to the housing and has multiple first mounting holes. Multiple heat exchange tubes 20 are respectively inserted through the multiple first mounting holes. Thus, the first seal can fill the gap between the housing and the heat exchange tubes 20 to form a seal, and this improves the structural stability of the heat exchange tubes 20. That is, the first mounting holes may have the same shape as the heat exchange tubes 20 to improve the sealing effect. The first seal can be fitted with the housing and the seal through a compression fit or an interference fit to further improve the sealing effect. Similarly, the second seal is sealed to the housing and has multiple second mounting holes. Multiple heat exchange tubes 20 are respectively inserted through the multiple second mounting holes to improve the sealing performance. The second seal can also be used to fix the heat exchange tubes 20, improving structural stability. The second seal can be fitted with the housing and the seal through a compression fit or an interference fit to further improve the sealing effect. For example, during assembly, the first seal can be installed into the housing first, one end of the heat exchange tube 20 passes through the first mounting hole, and the other end of the heat exchange tube 20 passes through the second mounting hole, thereby allowing the second seal to be installed in the housing. The first and second seals are interference-fitted with the housing and the heat exchange tube 20 to achieve a seal. For example, the first and second seals can be flexible components.

[0111] Referring to Figures 2 and 3, in some embodiments of this application, one end of the shell is provided with a first inlet 201 and a second inlet 202, and the other end of the shell is provided with a first outlet 203 and a second outlet 204; multiple heat exchange tubes 20 are connected to the first inlet 201 and the first outlet 203, and a second flow channel 120 is connected to the second inlet 202 and the second outlet 204. Thus, the first inlet 201 and the first outlet 203 can be connected to the first flow channel 110, and the second inlet 202 and the second outlet 204 can be connected to the second flow channel 120, which can realize the flow of two heat exchange media. Therefore, providing two inlets and two outlets at the inlet end and the outlet end respectively can facilitate the connection of different media, construct different heat exchange channels, and improve the heat exchange effect.

[0112] The two ends of the heat exchange tube 20 are connected to the first inlet 201 and the first outlet 203, respectively, which can increase the water flow and improve the heat exchange effect. A heat exchange channel is formed between the heat exchange tube 20 and the shell, and the heat exchange channel is connected to the second inlet 202 and the second outlet 204. In other words, the first inlet 201, the heat exchange tube 20 and the first outlet 203 in the heat exchanger 100 are connected to form a heat exchange flow path, and the second inlet 202, the heat exchange channel and the second outlet 204 are connected to form another heat exchange flow path. Thus, two heat exchange flow paths can be constructed in the heat exchanger 100, which is beneficial to improving the heat recovery efficiency. Alternatively, the first inlet 201 and the first outlet 203 can be connected to one type of external pipeline, while the second inlet 202 and the second outlet 204 can be connected to another type of external pipeline. The heat exchange channel is located between the heat exchange tube 20 and the shell, which can realize heat exchange between the two heat exchange flow paths and improve the structural compactness of the heat exchanger 100.

[0113] More specifically, a second flow channel 120 is formed between the multiple heat exchange tubes 20 and the shell. The second flow channel 120 includes a flow channel formed by two adjacent heat exchange tubes 20 and the inner wall of the shell, and a flow channel formed between the heat exchange tube 20 located at the outermost edge of the shell and the inner wall of the shell. These flow channels are interconnected, so that the second flow channel 120 can fill the heat exchanger 100 and can fully contact the multiple heat exchange tubes 20. The water in the second flow channel 120 can exchange heat with the first flow channel 110, which is beneficial to improve heat exchange efficiency and energy utilization.

[0114] In practical applications, the first medium flows into the first diversion channel 31 through the first inlet 201, and then sequentially enters into multiple heat exchange tubes 20 along the first diversion channel 31. After that, it enters the first confluence channel 42 through the first flow channel 110 constructed by the heat exchange tubes 20, and then enters the first outlet 203 along the first confluence channel 42, thus completing the first type of water flow mode in the heat exchanger 100.

[0115] The second medium enters the second diversion channel 32 through the second inlet 202, and sequentially flows into multiple second flow channels 120 along the second diversion channel 32. It then enters the second confluence channel 44 at the other end and flows along the second confluence channel 44 into the second outlet 204, thus completing the second type of water flow in the heat exchanger 100. Both water flows simultaneously in the heat exchanger 100 without contact, thereby achieving high-efficiency heat exchange. The first medium can be clean water and / or low-temperature water, and the second medium can be sewage and / or high-temperature water.

[0116] Furthermore, in some embodiments of this application, referring to Figure 2, the shell includes a first inlet pipe 21 and a second inlet pipe 22. The first inlet pipe 21 is connected to the first diversion channel 31; the second inlet pipe 22 passes through the first diversion channel 31 and connects to the heat exchange space, thereby achieving isolation between the first flow channel 110 and the second flow channel 120. When cold water and wastewater with a certain temperature are introduced into the first inlet pipe 21 and the second inlet pipe 22, it can achieve the effect of isolating cold and hot water at the inlet end. Similarly, the shell includes a first outlet pipe 23 and a second outlet pipe 24. The first outlet pipe 23 is connected to the first confluence channel 42; the second outlet pipe 24 passes through the first confluence channel 42 and connects to the heat exchange space, and can isolate cold and hot water at the outlet end.

[0117] In some embodiments of this application, referring to Figure 2, the inner walls of the first confluence channel 42 and the second confluence channel 44 are provided with protrusions 41. The protrusions 41 extend in the same direction as the second flow channel 120. The protrusions 41 can guide the water flow to the outlet in the confluence channel, which is beneficial for drainage.

[0118] Referring to Figures 1 and 2, in some embodiments of this application, the housing includes a bottom shell 10 and a cover plate 113. The cover plate 113 covers the bottom shell 10. A first opening 121 and a second opening 122 are provided on the cover plate 113. The first opening 121 is opposite to the first sealing groove 401. The first opening 121 and the second opening 122 facilitate the injection of adhesive into the sealing groove, thereby facilitating the manufacture of the heat exchanger 100. That is, the cover plate 113 is placed on the bottom shell 10 before the sealing groove is filled, so that the adhesive can be fully filled between the cover plate 113 and the bottom shell 10, avoiding the need for sealing, improving the sealing effect, and also improving the tightness of the connection between the bottom shell 10 and the cover plate 113.

[0119] In some embodiments of this application, referring to Figures 2 and 5, the bottom wall of the bottom shell 10 is provided with a second boss 112, and the inner wall of the cover plate 113 is provided with a protrusion 123. The protrusion 123 and the second boss 112 are opposite to each other along the assembly direction. When the cover plate 113 covers the bottom shell 10, the protrusion 123 abuts against the second boss 112. The second boss 112 and the protrusion 123 can play a pre-positioning role during assembly, which facilitates assembly and provides high stability after assembly.

[0120] In some embodiments of this application, the bottom shell 10 is an integral structure, which is easy to manufacture and has strong structural stability, which helps to simplify the assembly steps of the heat exchanger 100 and reduce the assembly difficulty.

[0121] Furthermore, referring to Figures 2 and 5, in some embodiments of this application, the second protrusion 112 is provided with a positioning port 105, and the protrusion 123 is provided with a positioning platform 124. The positioning platform 124 extends into the positioning port 105. Thus, the positioning platform 124 can play a limiting role, and can also improve the tightness of the fit between the cover plate 113 and the bottom shell 10, and increase the contact area between the cover plate 113 and the bottom shell 10.

[0122] Referring to Figures 4 and 5, the inner wall structure of the cover plate 113 is the same as the bottom wall structure of the bottom shell 10. Thus, after the cover plate 113 is placed over the bottom shell 10, it creates a receiving cavity. The cover plate 113 and the bottom shell 10 can jointly enclose the heat exchange tube 20. Between the cover plate 113 and the bottom shell 10, a first diversion groove 31, a second diversion groove 32, a first confluence groove 42, a second confluence groove 44, and a first notch 101, a second notch 102, a third notch 103, and a fourth notch 104 are jointly constructed. In other words, the inner wall of the cover plate 113 can be provided with partitions corresponding to the first partition 11, the second partition 12, the third partition 13, and the fourth partition 14. When the cover plate 113 is placed over the bottom shell 10 along the height direction (see the vertical direction in Figure 2), the partitions of the cover plate 113 and the partitions of the bottom shell 10 communicate to construct the notch, the diversion groove, and the confluence groove. The cover plate 113 is also provided with a raised strip, which is opposite to the raised strip 41 inside the bottom shell 10 to improve the drainage effect.

[0123] For example, in actual assembly, the heat exchange tube 20 can be first assembled into the bottom shell 10. The bottom shell 10 has a pre-reserved positioning guide rail, allowing the heat exchange tube 20 to be directly installed in a preset position. Then, the cover plate 113 and the bottom shell 10 are precisely assembled using the positioning platform 124 and positioning port 105, ensuring they are aligned at the contact section. Afterwards, a tight connection (airtight / watertight) is formed between the bottom shell 10 and the cover plate 113 through ultrasonic welding, gasket fastening, or hot plate welding, as shown in Figure 1. Further, the first and second sealing elements (such as adhesive) are filled or injected into the gaps formed between the bottom shell 10, the cover plate 113, and the multiple heat exchange tubes 20 through the first opening 121 and the second opening 122. The height of the sealing elements is flush with the top cover. Finally, the heat exchanger 100 is placed in a vacuum chamber to remove air bubbles from the adhesive, achieving a more secure seal.

[0124] According to the embodiments of this application, by applying the aforementioned heat exchanger 100 inside the dishwasher, the waste heat recovery effect of the dishwasher can be improved, which is beneficial to improving the cleaning effect of the dishwasher.

[0125] In some embodiments of this application, the dishwasher further includes a water tank and an inner tub, the inner tub including a washing chamber that is connected to the water tank, a first water inlet 201 and a first water outlet 203 connected to the washing chamber, and a second water inlet 202 and a second water outlet 204 connected to the water tank.

[0126] Specifically, the washing chamber is connected to the water tank, thereby supplying water to the washing chamber for cleaning tableware. The first inlet 201 and the first outlet 203 are connected to the washing chamber, allowing the high-temperature liquid inside to circulate within the first flow channel 110. The second inlet 202 and the second outlet 204 are connected to the water tank, allowing the liquid in the water tank to circulate within the second flow channel 120. This facilitates heat exchange between the liquid in the washing chamber and the liquid in the water tank, enabling the recovery of waste heat from the liquid in the washing chamber.

[0127] In a specific application, when the heat exchanger 100 is used in a dishwasher for waste heat recovery, the liquid in the water tank flows through the first inlet 201 to the first diversion channel 31, and after being diverted by the first diversion channel 31, it flows to the first flow channel 110, and then flows from the first flow channel 110 to the first confluence channel 42. Under the confluence of the first confluence channel 42, it flows out of the first outlet 203, realizing the flow of the low-temperature side flow path; the high-temperature liquid in the washing chamber enters the second diversion channel 32 through the second inlet 202, and under the diversion of the second diversion channel 32, it enters the second flow channel 120, and then flows from the second flow channel 120 to the second confluence channel 44. Under the confluence of the second confluence channel 44, it flows out of the second outlet 204, realizing the flow of the high-temperature side flow path. In this dishwasher, the liquid in the washing chamber is at a higher temperature, while the liquid in the water tank is at a lower temperature. Therefore, through the aforementioned heat exchange cycle, the temperature of the liquid in the water tank is increased, thus recovering the residual heat from the liquid inside the dishwasher. This improves the dishwasher's heat utilization rate and reduces its energy consumption. Specifically, the liquid in the washing chamber is heated during the main wash cycle, hence its higher temperature.

[0128] Understandably, a dishwasher includes at least a main wash and a rinse cycle. During the main wash, liquid is introduced into the dishwasher's washing chamber and heated to improve the cleaning effect on the kitchenware. In the rinse cycle, clean water is used to wash the kitchenware to further enhance the cleanliness. The water used in the rinse cycle is heated by exchanging heat with the hot water from the main wash, thus improving the rinsing effect and shortening the rinsing time.

[0129] In some embodiments, the width direction of the heat exchanger 100 can be referenced to the left-right direction in FIG2, the length direction of the heat exchanger 100 can be referenced to the front-back direction in FIG2, and the thickness direction of the heat exchanger 100 can be referenced to the up-down direction in FIG2.

[0130] As shown in Figures 8 to 11, according to some other embodiments of the present application, the heat exchanger 100 further includes a fixing frame 210 and a sealing structure 43. The shell has a receiving cavity, and the heat exchange assembly is disposed in the receiving cavity. The fixing frame 210, the heat exchange tube 20, and the sealing structure 43 are located at both ends of the heat exchange tube 20 and are sealed to the heat exchange tube 20 through the sealing structure 43. The sealing structure 43 is sealed to the shell to divide the receiving cavity into a flow distribution cavity a located at both ends and a heat exchange cavity b located in the middle region. The flow distribution cavity a is connected to the heat exchange tube 20 and is suitable for containing a first medium. The heat exchange cavity b is suitable for containing a second medium, and the first medium and the second medium exchange heat.

[0131] The heat exchange assembly is formed by the fixed frame 210, the sealing structure 43, and the heat exchange tube 20.

[0132] A heat exchanger 100 according to some embodiments of this application includes a housing and a heat exchange assembly. The housing has a receiving cavity, and the heat exchange assembly is disposed within the receiving cavity. The heat exchange assembly includes a fixing frame 210, a heat exchange tube 20, and a sealing structure 43. The fixing frame 210 is located at both ends of the heat exchange tube 20 and is sealed to the heat exchange tube 20 via the sealing structure 43. The sealing structure 43 is sealed to the housing, dividing the receiving cavity into a flow distribution cavity a located at both ends and a heat exchange cavity b located in the middle region. The flow distribution cavity a communicates with the heat exchange tube 20 and is suitable for containing a first medium, while the heat exchange cavity b is suitable for containing a second medium. The first medium and the second medium exchange heat.

[0133] Specifically, the shell defines a receiving cavity, which can be generally rectangular in shape. The shell and the heat exchange assembly can be connected by a sealing structure 43. The sealing structure 43 and the shell can be sealed by one or more combinations of various forms such as adhesive bonding, snap-fit, and interference fit. This divides the receiving cavity into two flow chambers a located at both ends of the shell and a heat exchange chamber b located in the middle area of ​​the shell. The flow chambers a and b are spaced apart to seal each other. The first medium in the flow chamber a located at one end of the shell can flow to the heat exchange tube 20 and then flow from the heat exchange tube 20 to the flow chamber a located at the other end of the shell, so as to realize the flow of the first medium in the heat exchanger 100. The heat exchange chamber b can contain the second medium. The heat exchange tube 20 passes through the heat exchange chamber b so that the second medium and the first medium can exchange heat in the heat exchange chamber b, so as to realize the heat exchange function of the heat exchanger 100.

[0134] Meanwhile, the heat exchange tube 20 is fixed inside the shell by the fixing bracket 210, which can improve the stability and reliability of the heat exchange assembly in the shell. The sealing structure 43 can achieve the seal between the heat exchange tube 20 and the fixing bracket 210, preventing the first medium from overflowing through the gap between the fixing bracket 210 and the heat exchange tube 20, thus improving the sealing performance of the heat exchange assembly. The sealing structure 43 can also achieve the seal between the heat exchange assembly and the shell, and is used to separate the flow distribution chamber a and the heat exchange chamber b. This can simplify the structure of the heat exchanger 100, reduce the processing difficulty of the heat exchanger 100, reduce the cost of the heat exchanger 100, and also reduce the space occupied by the heat exchanger 100, which facilitates the miniaturization and compact design of the heat exchanger 100.

[0135] It is understood that the flow divider a and heat exchanger b are sealed at intervals by the sealing structure 43, which can prevent the mixing of the first medium and the second medium. For example, in the embodiment where the heat exchanger 100 is applied to a dishwasher, the seal between the first medium and the second medium can prevent the mixing of the high-temperature washing medium containing impurities with the clean low-temperature washing medium, thereby preventing the clean washing medium in the water tank from being contaminated. This can ensure the washing effect of the dishwasher and prevent odors from being generated in the water tank of the dishwasher, thereby improving the cleaning effect and user experience of the dishwasher. In industrial application scenarios where the first medium and the second medium are respectively low-temperature refrigerant and high-temperature refrigerant, the mixing of the low-temperature refrigerant and the high-temperature refrigerant can be prevented, which can improve the stability and safety of industrial equipment using the heat exchanger 100 of this application embodiment and reduce safety hazards.

[0136] It should be noted that in some embodiments, the first medium or the second medium can be the same medium, while in other embodiments, the first medium and the second medium can be different media. The first medium and the second medium can be water, refrigerant, etc., and in some cleaning application scenarios, they can also be washing media.

[0137] In some embodiments, the first medium may exist in the flow distribution chamber a and the heat exchange tube 20, or the second medium may exist in the heat exchange chamber b and be kept sealed from the outside without external supply. Heat exchange and energy transfer are achieved through the phase change of the first or second medium. In other embodiments, the first and second medium may also flow through a medium pipeline to achieve heat exchange and energy transfer through non-phase change or phase change forms.

[0138] It is understood that the heat exchanger 100 of the present application embodiment can be applied in the field of energy recovery technology, such as waste heat recovery of dishwashers, and can also be applied in the field of refrigeration technology, such as industrial-grade heat exchanger 100, household air cooler, etc.

[0139] According to the embodiments of this application, the heat exchanger 100, the fixing frame 210 and the heat exchange tube 20 are connected by a sealing structure 43, which can improve the sealing performance of the heat exchange components, improve the fixing stability and reliability of the heat exchange components in the shell, and the sealing structure 43 is also used to divide the flow distribution chamber a and the heat exchange chamber b, and realize the sealing between the flow distribution chamber a and the heat exchange chamber b. The sealing structure 43 is constructed as a reusable structure, which can simplify the structure of the heat exchanger 100, improve the space occupation of the heat exchanger 100, realize the miniaturization and compact design of the heat exchanger 100, and reduce the cost of the heat exchanger 100. At the same time, it can improve the sealing performance of the heat exchanger 100, avoid crossflow between the first medium and the second medium, improve the working stability and reliability, and improve the user experience.

[0140] As shown in Figures 8 and 9, according to some embodiments of this application, the housing includes: a bottom shell 10 and a cover plate 113. The cover plate 113 covers the bottom shell 10 to define an accommodating cavity. The bottom shell 10 is provided with a first water inlet pipe 21 and a first water outlet pipe 23 communicating with the diversion cavity a, and a second water inlet pipe 22 and a second water outlet pipe 24 communicating with the heat exchange cavity b.

[0141] Specifically, the bottom shell 10 may include a bottom plate and a side plate, the bottom plate and the side plate defining a receiving groove, and a cover plate 113 may be installed on the open side of the receiving groove, defining a receiving cavity. The receiving cavity is suitable for accommodating the heat exchange assembly. A first water inlet pipe 21, a second water inlet pipe 22, a first water outlet pipe 23, and a second water outlet pipe 24 are then provided on the shell. The first water inlet pipe 21 communicates with a flow distribution cavity a located at one end of the shell, and the first water outlet pipe 23 communicates with a flow distribution cavity a located at the other end of the shell, so that the first medium can flow through the first water inlet pipe 21, the flow distribution cavity a at one end of the shell, and the heat exchange tube 20. The second medium flows along the first medium path defined by the flow divider a at the other end of the shell and the first outlet pipe 23. The second inlet pipe 22 passes through the flow divider a at one end of the shell and connects to the heat exchange chamber b, or directly connects to the heat exchange chamber b. The second outlet pipe 24 passes through the flow divider a at the other end of the shell and connects to the heat exchange chamber b, or directly connects to the heat exchange chamber b, so that the second medium can flow along the second medium path defined by the second inlet pipe 22, the heat exchange chamber b, and the second outlet pipe 24, and directly exchange heat with the first medium located in the heat exchange tube 20 and the second medium located in the heat exchange chamber b within the heat exchange chamber b.

[0142] In other words, by setting up the first inlet pipe 21, the first outlet pipe 23, the second inlet pipe 22 and the second outlet pipe 24, the first medium path and the second medium path can be defined respectively. Then, through the heat exchange between the first medium and the second medium, waste heat recovery or cooling or heating functions can be realized, thereby improving the reliability and stability of the heat exchanger 100.

[0143] It is understandable that the bottom shell 10 and the cover plate 113 can be fixed by welding, and the cover plate 113 and the sealing structure 43 can be sealed by pressing against each other, or the welding heat can cause the sealing structure 43 to melt and further achieve a heat-melted seal. The downward welding force can also further press against the sealing structure 43, so that the sealing structure 43 and the bottom surface of the bottom shell 10 can be sealed. The fixing frame 210 and the bottom shell 10 can be an integrally formed structure or separate parts. The bottom shell 10 and the cover plate 113 can be fixed by welding, or a sealing gasket structure can be further provided. The two can be fixed and sealed by snap-fit, screw-fit, plug-in and other forms.

[0144] As shown in Figure 9, the first water inlet pipe 21 is located at one end of the bottom shell 10, and the first water outlet pipe 23 is located at the other end of the bottom shell 10, and both are connected to a diversion cavity a.

[0145] This makes the first medium path longer. The longer the flow path of the first medium, the more sufficient the heat exchange, the better the heat exchange effect, and the higher the heat exchange efficiency. In addition, the first water inlet pipe 21 and the first water outlet pipe 23 are respectively set at opposite ends of the bottom shell 10. The setting position is reasonable and facilitates pipeline layout.

[0146] As shown in Figure 9, a barrier pipe section 18 is also provided on one end of the second water inlet pipe 22 and the second water outlet pipe 24 that extends into the accommodating cavity. The barrier pipe section 18 is connected to the fixing frame 210, passes through the diversion cavity a, and is connected to the heat exchange cavity b.

[0147] In this way, the ends of the second inlet pipe 22 and the second outlet pipe 24 that extend into the shell can be isolated from the diversion cavity a by the blocking pipe section 18, so that the pattern between the first medium and the second medium is better and the working stability and reliability of the heat exchanger 100 are higher.

[0148] Furthermore, the barrier pipe section 18 includes: a connecting plate 181 and a mounting plate 182 located on one side of the connecting plate 181. The connecting plate 181 is connected to the second inlet pipe 22 or the second outlet pipe 24, and the fixing bracket 210 is installed between the mounting plate 182 and the mounting groove 17.

[0149] In other words, the top and bottom surfaces of the mounting plate 182 and the connecting plate 181 can be sealed with the shell. The mounting plate 182 and the connecting plate 181 define the channel connecting the second water inlet pipe 22, the second water outlet pipe 24 and the heat exchange chamber b. This channel can be separated from the diversion chamber a to improve the sealing effect between the diversion chamber a and the heat exchange chamber b, avoid crossflow between the first medium and the second medium, improve heat exchange stability, and avoid mixing and contamination between the first medium and the second medium.

[0150] It should be noted that in some other embodiments, the barrier section 18 may also be integrally formed with the housing.

[0151] Referring to Figures 9, 10, and 11, an installation groove 17 is provided on the inner wall of the bottom shell 10. At least a portion of the sealing structure 43 extends into the installation groove 17 to form a sealed connection with the bottom shell 10. A positioning protrusion 183 is provided on the mounting plate 182, extending toward the installation groove 17. At least a portion of the sealing structure 43 is located within the positioning protrusion 183 to seal the gap between the fixing bracket 210 and the blocking pipe section 18. The fixing bracket 210 is located between the installation groove 17 and the blocking pipe section 18.

[0152] Specifically, the sealing structure 43 can be constructed as a rubber-coated structure. The fixing frame 210 and the heat exchange tube 20 can be set in a mold, and liquid rubber is injected into the mold to fix and seal the heat exchange tube 20 and the fixing frame 210. It can also seal the rubber to prevent the soft rubber from overflowing during the secondary rubber coating process. After the secondary rubber coating is completed, during the process of further assembling the heat exchange component into the shell, the outer periphery (i.e., the side, bottom and top surfaces) of the sealing structure 43 can be elastically deformed and sealed by extrusion pressure.

[0153] The inner wall of the bottom shell 10 may have a raised structure, and an installation groove 17 is opened on the raised structure. A positioning protrusion 183 is formed on the mounting plate 182 corresponding to the blocking pipe section 18. The positioning protrusion 183, the installation groove 17 and the fixing bracket 210 cooperate. That is to say, the extrusion force includes: the side extrusion force of the sealing structure 43 on the installation groove 17 and the positioning protrusion 183 and the top extrusion force of the cover plate 113 covering the bottom shell 10. The sealing is achieved by the side extrusion force and the top extrusion force. While improving the sealing effect, it can also limit the heat exchange component, that is, fix the fixing bracket 210 and effectively seal the gap between the fixing bracket 210 and the mounting plate 182. This can prevent the heat exchange component from moving around and further improve the sealing stability and reliability.

[0154] It is understood that the positioning protrusion 183 can be constructed as a connecting block, and a protrusion or groove is formed on it. Correspondingly, the sealing structure 43, which is constructed as an adhesive-coated structure, has a groove or protrusion formed on it. The positioning protrusion 183 and the sealing structure 43 are in concave-convex fit to achieve fixation and sealing.

[0155] As can be understood, as shown in Figure 9, in some embodiments, the fixing bracket 210 is disposed on both sides of the width of the barrier tube segment 18, that is, in the width direction of the housing, the fixing bracket 210 is disposed on both sides of the barrier tube segment 18. In other embodiments, the barrier tube segment 18 is disposed on the side adjacent to the width of the housing, while the fixing bracket 210 is disposed on the other side of the barrier tube segment 18.

[0156] In other words, there can be multiple mounting brackets 210, and each mounting bracket 210 corresponds to a heat exchange component. Only one heat exchange component can be installed inside the housing. In this embodiment, one side of the barrier tube segment 18 is sealed to the housing, and the other side is sealed to the mounting bracket 210. In the embodiment where multiple heat exchange components are installed inside the housing, the number of barrier tube segments 18 can also be one or more. Some of the barrier tube segments 18 are provided with mounting brackets 210 on both sides, while other barrier tube segments 18 are provided with mounting brackets 210 only on one side of the width.

[0157] As shown in Figure 10, according to some embodiments of this application, the sealing structure 43 includes a first sealing part 431 and a second sealing part 432. The heat exchange tube 20 and the fixing frame 210 are sealed and connected through the first sealing part 431, and the heat exchange assembly and the shell are sealed and connected through the second sealing part 432.

[0158] Specifically, the first sealing part 431 and the second sealing part 432 can be obtained in the first coating process and the second coating process, respectively. That is, the first sealing part 431 is obtained in the first coating process, realizing the fixed connection between the heat exchange tube 20 and the fixed frame 210, and the fixed frame 210 can be used for sealing to prevent the soft glue from overflowing during the second coating process. During the second coating process, the second sealing part 432 can be formed by wrapping around the outer periphery of the fixed frame 210. The second sealing part 432 elastically abuts against the shell to realize the seal between the heat exchange component and the shell, and ensure the seal between the heat exchange chamber b and the diversion chamber a.

[0159] As shown in Figure 8, the second sealing part 432 further includes a plurality of sealing protrusions, which elastically abut against the housing.

[0160] Specifically, the sealing protrusion can abut against the mounting groove 17, the bottom surface of the bottom shell 10, and the positioning protrusion 183. The mounting groove 17 and the positioning protrusion 183 can be constructed as U-shaped grooves, arc-shaped grooves, etc. The number of sealing protrusions can be two, three or more, to improve sealing stability and reliability.

[0161] As shown in Figures 8, 9 and 11, in some embodiments, there are multiple heat exchange components, which are arranged sequentially in the width direction of the heat exchanger 100 within the accommodating cavity.

[0162] For example, there may be two, three or more heat exchange components. Multiple heat exchange components are arranged sequentially in the width direction of the heat exchanger 100 within the accommodating cavity. By setting more heat exchange components, the heat exchange capacity of the heat exchanger 100 can be improved. Furthermore, the space occupied by the heat exchanger 100 can be reduced by integrating multiple heat exchange components into the same housing.

[0163] As shown in Figures 8 and 9, the housing further includes a partition 19, which is disposed on the cover plate 113 or the bottom shell 10, and the partition 19 is located between adjacent heat exchange components.

[0164] Specifically, the partition 19 can be constructed as a single plate structure and disposed between adjacent heat exchange components. Alternatively, the partition 19 can be constructed as a plate-shaped piece with multiple cavities hollowed out inside. Thus, the structural strength and stability of the shell can be improved through the partition 19.

[0165] It is understandable that the gaps between adjacent heat exchange tubes 20, the gap between the outermost heat exchange tube 20 and the inner wall of the bottom shell 10, and the gap between the innermost heat exchange tube 20 and the partition plate 19 are consistent.

[0166] Specifically, a certain amount of the second medium can be accommodated in the gaps between the heat exchange tubes 20, the gap between the outermost heat exchange tube 20 and the inner wall of the bottom shell 10, and the gap between the innermost heat exchange tube 20 and the partition plate 19. The second medium exchanges heat with the first medium in the heat exchange tube 20 in these gaps. The consistency of the above three gaps can make the heat exchange effect in the more than 100 areas of the heat exchanger more uniform. The heat exchanger 100 with higher temperature uniformity has higher working stability and reliability.

[0167] According to some embodiments of this application, the heat exchange tube 20 is constructed as a microchannel tube with an equivalent diameter of 0.8 mm to 5 mm.

[0168] In this design, the microchannel tube can be constructed as a flat tube. With the microchannel tube, the heat exchange area between the first medium and the second medium is larger under the same equivalent diameter, thereby improving the heat exchange efficiency and making the heat exchange between the second medium in the heat exchange chamber b and the first medium in the heat exchange tube 20 more complete.

[0169] The equivalent diameter of the microchannel tube (i.e., flat tube) is greater than or equal to 0.8 mm and less than or equal to 5 mm, which makes the size of the microchannel tube smaller, thereby reducing the overall volume of the heat exchanger 100 and facilitating the installation of the heat exchanger 100.

[0170] According to some embodiments of this application, the heat exchanger 100 has a length of 150mm to 280mm, a width of 20mm to 200mm, and a height of 6mm to 30mm.

[0171] In some possible designs, the height of heat exchanger 100 is greater than or equal to 6 mm and less than or equal to 30 mm; the width of heat exchanger 100 is greater than or equal to 20 mm and less than or equal to 200 mm; and the length of heat exchanger 100 is greater than or equal to 150 mm and less than or equal to 280 mm.

[0172] In this design, the length of the heat exchange section is between 150mm and 280mm, the height of the heat exchange section is between 6mm and 30mm, and the width of the heat exchanger 100 is between 20mm and 200mm, which reduces the overall volume of the heat exchanger 100 and facilitates its installation.

[0173] A dishwasher according to a second aspect of this application includes: a heat exchanger 100, a water cup, and a water tank. The water cup is connected to the diversion chamber a of the heat exchanger 100, and the water tank contains a washing medium and is connected to the heat exchange chamber b of the heat exchanger 100.

[0174] The dishwasher provided in the second aspect of this application, because it includes the heat exchanger 100 proposed in any of the above-mentioned technical solutions, has all the beneficial effects of the heat exchanger 100.

[0175] In this design, the dishwasher also includes a water tank and a water cup. The water cup is connected to the water tank, allowing water to be supplied to it for washing the dishes. The first inlet pipe 21 and the first outlet pipe 23 are connected to the water cup, enabling the high-temperature washing medium inside the cup to circulate within the heat exchange tube 20. The second inlet pipe 22 and the second outlet pipe 24 are connected to the water tank, allowing the low-temperature washing medium inside the tank to circulate within the heat exchange chamber b. This achieves heat exchange between the high-temperature washing medium in the water cup and the low-temperature washing medium in the water tank, thus recovering the waste heat from the high-temperature washing medium in the water cup.

[0176] In a specific application, when the heat exchanger 100 is used in a dishwasher for waste heat recovery, the high-temperature washing medium in the water cup flows into the diversion chamber a through the first water inlet pipe 21. After being diverted in the diversion chamber a, it flows to the heat exchange tube 20, and then flows through the heat exchange tube 20 into another diversion chamber a located at the other end of the shell, realizing the flow of the high-temperature side. The washing medium in the water tank enters the heat exchange chamber b through the second water inlet pipe 22, and then flows out from the heat exchange chamber b to the second water outlet pipe 24, realizing the flow of the low-temperature side.

[0177] In this dishwasher, the washing medium in the water cup is at a higher temperature, while the washing medium in the water tank is at a lower temperature. Therefore, through the aforementioned heat exchange cycle, the temperature of the washing medium in the water tank is increased, thus recovering residual heat from the washing medium inside the dishwasher. This improves the dishwasher's heat utilization rate and reduces its energy consumption. Specifically, the washing medium in the water cup is heated during the main wash cycle, hence its higher temperature.

[0178] Understandably, a dishwasher includes at least a main wash and a rinse cycle. During the main wash, the detergent is delivered to the dishwasher's water cup and heated to improve the cleaning effect on the kitchenware inside. During the rinse, clean water is used to wash the kitchenware to further enhance the cleanliness. The water used in the rinse cycle is heated by exchanging heat with the hot water from the main wash, thus improving the rinsing effect and shortening the rinse time.

[0179] In practical applications, the overall length, width, and height of the heat exchanger 100 range from 150mm to 280mm, 20mm to 200mm, and 6mm to 30mm, respectively. The first inlet pipe 21 is the high-temperature water inlet; the first outlet pipe 23 is the high-temperature water outlet; the second inlet pipe 22 is the low-temperature water inlet; and the second outlet pipe 24 is the low-temperature water outlet. The equivalent diameter of the pipes can be greater than 5mm, and the first inlet pipe 21, the first outlet pipe 23, and the second inlet pipe 22 are all the same. In addition, the interface method of the first inlet pipe 21, the first outlet pipe 23, the second inlet pipe 22, and the second outlet pipe 24 can be flexibly adjusted according to actual needs, and can be either counter-current or co-current.

[0180] The two shunt chambers a have similar overall outlines, but symmetrical internal structures; the heat exchange tube 20 is a microchannel tube with an equivalent diameter ranging from 0.8 mm to 5 mm, and its aspect ratio can be greater than 1:30 and less than 1:5.

[0181] The working process is as follows: After the waste heat recovery program starts, high-temperature water enters the first inlet pipe 21 through the external pipe, and is connected to the distribution chamber a at one end of the shell. The high-temperature water is then distributed equally to multiple heat exchange tubes 20 through the distribution chamber a. Subsequently, the high-temperature water enters the distribution chamber a at the other end of the shell and flows out through the first outlet pipe 23 into the high-temperature side pipeline system. At the same time, low-temperature water enters the second inlet pipe 22 through the external pipe, and is connected to the heat exchange chamber b. The low-temperature water flows out through the second outlet pipe 24 into the low-temperature side pipeline system. The high-temperature water can continuously circulate through the heat exchange tubes 20 for heat exchange under the action of the pump.

[0182] The heat exchanger 100 and other components and operations of the dishwasher according to the embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0183] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A heat exchanger, wherein, include: The housing has a first diversion channel, a first confluence channel, and a heat exchange space, wherein the heat exchange space is located between the first diversion channel and the first confluence channel; Multiple heat exchange tubes are disposed in the heat exchange space. A first flow channel is constructed inside the heat exchange tubes to connect the first diversion channel and the first confluence channel. A second flow channel is constructed outside the heat exchange tubes to cooperate with the first flow channel for heat exchange.

2. The heat exchanger according to claim 1, wherein, It also includes a first partition component and a second partition component, which are respectively disposed at both ends of the heat exchange space, and the two ends of the plurality of heat exchange tubes are respectively inserted through the first partition component and the second partition component.

3. The heat exchanger according to claim 2, wherein, The first partition component is an integral structure with the housing. The first partition component includes a first partition and a second partition. The first partition and the second partition extend along the width direction of the housing and are distributed along the length direction of the housing. And / or, the second partition assembly is an integral structure with the housing, and the second partition assembly includes a third partition and a fourth partition, the third partition and the fourth partition extending along the width direction of the housing and distributed along the length direction of the housing.

4. The heat exchanger according to claim 3, wherein, A first sealing groove is formed between the first separator and the second separator, and the housing is provided with a first opening communicating with the first sealing groove for injecting adhesive into the first sealing groove. And / or, a second sealing groove is formed between the third partition and the fourth partition, and the housing is provided with a second opening communicating with the second sealing groove for injecting adhesive into the second sealing groove.

5. The heat exchanger according to claim 2, wherein, The first partition component and the housing are separate structures, and the heat exchange tube is sealed to the first partition component and the housing through a sealing structure. The second partition assembly and the housing are separate structures, and the heat exchange tube is sealed to the second partition assembly and the housing through a sealing structure.

6. The heat exchanger according to claim 5, wherein, The sealing structure includes a first sealing part and a second sealing part. The heat exchange tube is sealed to the first partition assembly through the first sealing part, and the second sealing part is sealed to the shell.

7. The heat exchanger according to claim 6, wherein, The second sealing part includes a plurality of sealing protrusions, which elastically abut against the housing.

8. The heat exchanger according to claim 2, wherein, The first partition component has multiple first notches, and the first end of the heat exchange tube passes through the first notch; the second partition component has multiple third notches, and the second end of the heat exchange tube passes through the third notch.

9. The heat exchanger according to claim 8, wherein, The first notch is clearance-fitted with the heat exchange tube; and / or The third notch is fitted with a clearance between the heat exchange tube and the tube.

10. The heat exchanger according to any one of claims 1-9, wherein, The heat exchange space is provided with a second diversion channel and a second confluence channel. The second diversion channel is connected to one end of the plurality of second channels, and the second confluence channel is connected to the other end of the plurality of second channels.

11. The heat exchanger according to claim 10, wherein, The housing is provided with a first partition component and a second partition component. The first partition component is located between the first diversion channel and the second diversion channel, and the second partition component is located between the first confluence channel and the second confluence channel.

12. The heat exchanger according to claim 10, wherein, The inner side of the housing is provided with a first protrusion, which is located between the first manifold and the second manifold, and the first protrusion protrudes relative to the bottom surface of the first manifold and the bottom surface of the second manifold.

13. The heat exchanger according to any one of claims 1-12, wherein, The housing includes a bottom shell and a cover plate. The cover plate covers the bottom shell. The bottom wall of the housing is provided with a second boss. The inner wall of the cover plate is provided with a protrusion. The protrusion and the second boss are opposite to each other in the assembly direction. When the cover plate covers the housing, the protrusion abuts against the second boss.

14. The heat exchanger according to claim 13, wherein, The second protrusion is provided with a positioning opening, and the protrusion is provided with a positioning platform, the positioning platform extending into the positioning opening; and / or The bottom shell is a one-piece structure.

15. The heat exchanger according to claim 10, wherein, One end of the shell is provided with a first water inlet and a second water inlet, and the other end of the shell is provided with a first water outlet and a second water outlet; the first flow channel (110) connects the first water inlet and the first water outlet, and the second flow channel connects the second water inlet and the second water outlet.

16. The heat exchanger according to claim 15, wherein, The first inlet and the first outlet are connected to the first diversion channel, the first flow channel and the first confluence channel; The second inlet and the second outlet are connected to the second diversion channel, the second flow channel and the second confluence channel.

17. The heat exchanger according to claim 1, wherein, It also includes a fixing frame and a sealing structure. The housing has a receiving cavity. The fixing frame is located at both ends of the heat exchange tube and is sealed to the heat exchange tube through the sealing element. The sealing element is sealed to the housing to divide the receiving cavity into a flow distribution cavity at both ends and a heat exchange cavity in the middle region. The flow distribution cavity is in communication with the heat exchange tube and is adapted to contain a first medium. The heat exchange cavity is adapted to contain a second medium, and the first medium and the second medium exchange heat.

18. The heat exchanger according to claim 17, wherein, The housing includes a bottom shell and a cover plate. The cover plate covers the bottom shell to define the accommodating cavity. The bottom shell is provided with a first water inlet pipe and a first water outlet pipe communicating with the diversion cavity, and a second water inlet pipe and a second water outlet pipe communicating with the heat exchange cavity.

19. The heat exchanger according to claim 18, wherein, The first water inlet pipe is located at one end of the bottom shell, and the first water outlet pipe is located at the other end of the bottom shell, and each is connected to one of the diversion chambers.

20. The heat exchanger according to claim 18, wherein, The inner wall of the bottom shell is provided with a mounting groove, and at least a portion of the sealing element extends into the mounting groove to form a sealing connection with the bottom shell.

21. The heat exchanger according to claim 20, wherein, The second inlet pipe and the second outlet pipe are provided with a barrier pipe section at one end that extends into the accommodating cavity. The barrier pipe section is connected to the fixing frame, passes through the diversion cavity, and communicates with the heat exchange cavity.

22. The heat exchanger according to claim 21, wherein, The barrier pipe section includes: a connecting plate and a mounting plate located on one side of the connecting plate. The connecting plate is connected to the second inlet pipe or the second outlet pipe, and the fixing bracket is installed between the mounting plate and the mounting groove.

23. The heat exchanger according to claim 22, wherein, The mounting plate is provided with a positioning protrusion that extends toward the mounting groove. At least a portion of the seal is located within the positioning protrusion to seal the gap between the fixing bracket and the barrier pipe section.

24. The heat exchanger according to claim 21, wherein, The fixing bracket is disposed on both sides of the width of the barrier pipe section, or on one side of the width of the barrier pipe section adjacent to the housing, and the fixing bracket is disposed on the other side of the barrier pipe section.

25. The heat exchanger according to claim 17, wherein, The sealing element includes a first sealing part and a second sealing part. The heat exchange tube is sealed to the fixed frame through the first sealing part, and the heat exchange assembly is sealed to the housing through the second sealing part.

26. The heat exchanger according to claim 25, wherein, The second sealing part includes a plurality of sealing protrusions, which elastically abut against the housing.

27. The heat exchanger according to claim 18, wherein, Multiple heat exchange tubes are arranged sequentially in the width direction of the heat exchanger within the accommodating cavity; the housing further includes a partition plate disposed on the cover plate or the bottom shell, and the partition plate is located between adjacent heat exchange components.

28. The heat exchanger according to claim 27, wherein, The gaps between adjacent heat exchange tubes, the gap between the outermost heat exchange tube and the inner wall of the bottom shell, and the gap between the innermost heat exchange tube and the partition are consistent.

29. The heat exchanger according to any one of claims 1-17 or 20-28, wherein, The housing includes a first water inlet pipe and a second water inlet pipe, the first water inlet pipe being connected to the first diversion channel; the second water inlet pipe passing through the first diversion channel and connecting to the heat exchange space; and / or The housing includes a first water outlet pipe and a second water outlet pipe, the first water outlet pipe being connected to the first confluence channel; the second water outlet pipe passing through the first confluence channel and connecting to the heat exchange space; and / or The heat exchange tubes extend along the length of the heat exchanger, and the plurality of heat exchange tubes are arranged side by side along the width of the heat exchanger; and / or The plurality of heat exchange tubes are arranged at intervals along the width direction of the heat exchanger; and / or The second flow channel has a dimension greater than 0.5 mm along the width direction of the heat exchanger; and / or The wall thickness of the heat exchange tube is greater than 0.4 mm; and / or The heat exchange tube is constructed as a microchannel tube, with an equivalent diameter of 0.8 mm to 5 mm.

30. A dishwasher, wherein, include: The heat exchanger according to any one of claims 1-29.

31. The dishwasher according to claim 30, wherein, Also includes: A water cup, wherein the water cup is connected to the flow distribution chamber of the heat exchanger; A water tank containing a washing medium and connected to the heat exchange chamber of the heat exchanger.

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