Heat exchanger and dishwasher

Abstract

The heat exchanger comprises a shell and a plurality of heat exchange pipes, the shell is provided with a first flow dividing groove, a first flow collecting groove and a heat exchange space, the heat exchange space is arranged between the first flow dividing groove and the first flow collecting groove, the heat exchange pipes are arranged in the heat exchange space, and the heat exchange pipes are arranged in the heat exchange space. A first flow channel communicated with the first flow dividing groove and the first flow converging groove is formed in the heat exchange pipe, and a second flow channel matched with the first flow channel in a heat exchange mode is formed outside the heat exchange pipe. According to the heat exchanger provided by the embodiment of the utility model, the first flow channel and the second flow channel can independently circulate, and water mixing between the flow channels can be prevented, so that the water quality of the flow channels is prevented from being polluted.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a heat exchanger and a dishwasher with the heat exchanger. Background Art

[0002] At present, a washing cavity can be communicated with a water tank, and then water is supplied into the washing cavity. The heat exchanger can realize heat exchange between the liquid in the washing cavity and the liquid in the water tank, so as to realize the recovery of the waste heat of the liquid in the washing cavity.

[0003] In the related art, the heat exchanger is generally installed in the water tank. When the liquid in the washing cavity exchanges heat with the liquid in the water tank, there is a phenomenon of water cross-flow between the heat exchange channels in the heat exchanger, resulting in water quality pollution. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems in the related art to some extent. For this purpose, an object of the utility model is to provide a heat exchanger with independent first and second channels to ensure that the water quality of the channels is not polluted.

[0005] Another object of the utility model is to provide a dishwasher including the aforementioned heat exchanger.

[0006] The heat exchanger according to the embodiment of the utility model includes: a housing and a plurality of heat exchange tubes. The housing is provided with a first flow dividing groove, a first flow collecting groove and a heat exchange space. The heat exchange space is arranged between the first flow dividing groove and the first flow collecting groove. The plurality of heat exchange tubes are arranged in the heat exchange space. A first channel communicating the first flow dividing groove and the first flow collecting groove is constructed inside the heat exchange tubes, and a second channel for heat exchange cooperation with the first channel is constructed outside the heat exchange tubes.

[0007] In the heat exchanger according to the embodiment of the utility model, the first channel and the second channel can flow independently, which can prevent water cross-flow between the channels, thereby ensuring that the water quality of the channels is not polluted.

[0008] In addition, the heat exchanger according to the above embodiment of the utility model may further have the following additional technical features:

[0009] In some examples of the utility model, the heat exchanger further includes a first separating component and a second separating component. The first separating component and the second separating component are respectively arranged at two ends of the heat exchange space. Two ends of the plurality of heat exchange tubes respectively penetrate through the first separating component and the second separating component.

[0010] In some examples of the present utility model, the first partition component and the housing are of an integral structure. The first partition component includes a first partition member and a second partition member. The first partition member and the second partition member extend along the width direction of the housing and are distributed along the length direction of the housing.

[0011] In some examples of the present utility model, the second partition component and the housing are of an integral structure. The second partition component includes a third partition member and a fourth partition member. The third partition member and the fourth partition member extend along the width direction of the housing and are distributed along the length direction of the housing.

[0012] In some examples of the present utility model, a first sealing groove is formed between the first partition member and the second partition member. The housing is provided with a first opening communicating with the first sealing groove for injecting glue into the first sealing groove.

[0013] In some examples of the present utility model, a second sealing groove is formed between the third partition member and the fourth partition member. The housing is provided with a second opening communicating with the second sealing groove for injecting glue into the second sealing groove.

[0014] In some examples of the present utility model, the first partition component and the housing are of a split structure. The heat exchange tube is hermetically connected to the first partition component and the housing through a sealing structure; the second partition component and the housing are of a split structure. The heat exchange tube is hermetically connected to the second partition component and the housing through a sealing structure.

[0015] In some examples of the present utility model, the sealing structure includes a first sealing portion and a second sealing portion. The heat exchange tube is hermetically connected to the first partition component through the first sealing portion, and the second sealing portion is hermetically connected to the housing.

[0016] In some examples of the present utility model, the second sealing portion includes a plurality of sealing protrusions, and the sealing protrusions elastically abut against the housing.

[0017] In some examples of the present utility model, 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 notches; 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.

[0018] In some examples of the present utility model, the first notches and the heat exchange tube are in clearance fit.

[0019] In some examples of the present utility model, the third notches and the heat exchange tube are in clearance fit.

[0020] In some examples of the present utility model, the heat exchange space is provided with a second flow dividing groove and a second flow collecting groove. The second flow dividing groove communicates with one end of the plurality of second flow channels, and the second flow collecting groove communicates with the other end of the plurality of second flow channels.

[0021] In some examples of the present utility model, the housing is provided with a first partition assembly and a second partition assembly. The first partition assembly is disposed between the first flow dividing groove and the second flow dividing groove, and the second partition assembly is disposed between the first flow collecting groove and the second flow collecting groove.

[0022] In some examples of the present utility model, the inner side surface of the housing is provided with a first boss. The first boss is disposed between the first flow collecting groove and the second flow collecting groove, and the first boss protrudes relative to the bottom surface of the first flow collecting groove and the bottom surface of the second flow collecting groove.

[0023] In some examples of the present utility model, the housing includes a bottom case and a cover plate. The cover plate covers the bottom case. The bottom wall of the bottom case is provided with a second boss, and the inner wall of the cover plate is provided with a protrusion. The protrusion and the second boss face each other along the assembly direction. When the cover plate seals the housing, the protrusion abuts against the second boss.

[0024] In some examples of the present utility model, the second boss is provided with a positioning opening, and the protrusion is provided with a positioning platform. The positioning platform extends into the positioning opening.

[0025] In some examples of the present utility model, the bottom case is of an integral structure.

[0026] In some examples of the present utility model, 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 communicates the first water inlet and the first water outlet, and the second flow channel communicates the second water inlet and the second water outlet.

[0027] In some examples of the present utility model, the first water inlet and the first water outlet communicate with the first flow dividing groove, the first flow channel, and the first flow collecting groove;

[0028] The second water inlet and the second water outlet communicate with the second flow dividing groove, the second flow channel, and the second flow collecting groove.

[0029] In some examples of the present utility model, the housing includes a first water inlet pipe and a second water inlet pipe. The first water inlet pipe communicates with the first flow dividing groove. The second water inlet pipe passes through the first flow dividing groove and communicates with the heat exchange space.

[0030] In some examples of the present utility model, the housing includes a first water outlet pipe and a second water outlet pipe. The first water outlet pipe is communicated with the first confluence trough; the second water outlet pipe penetrates through the first confluence trough and is communicated with the heat exchange space.

[0031] In some examples of the present utility model, the heat exchange pipes extend along the length direction of the heat exchanger, and the plurality of heat exchange pipes are arranged side by side along the width direction of the heat exchanger.

[0032] In some examples of the present utility model, the plurality of heat exchange pipes are arranged at intervals along the width direction of the heat exchanger.

[0033] In some examples of the present utility model, the size of the second flow channel along the width direction of the heat exchanger is greater than 0.5 mm.

[0034] In some examples of the present utility model, the wall thickness of the heat exchange pipe (20) is greater than 0.4 mm.

[0035] The dishwasher according to an embodiment of the present utility model includes: the aforementioned heat exchanger.

[0036] By applying the aforementioned heat exchanger in the dishwasher, the dishwasher according to an embodiment of the present utility model can improve the waste heat recovery effect of the dishwasher, which is beneficial to improving the cleaning effect of the dishwasher. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic structural view of the heat exchanger in some embodiments of the present utility model;

[0038] Figure 2 is an exploded view of the heat exchanger in some embodiments of the present utility model;

[0039] Figure 3 is a schematic structural view of the heat exchanger in some embodiments of the present utility model (the cover plate is not shown);

[0040] Figure 4 is a cross-sectional view of the heat exchanger in some embodiments of the present utility model;

[0041] Figure 5 is a schematic structural view of the cover plate in some embodiments of the present utility model;

[0042] Figure 6 is a schematic structural view of the heat exchanger in some other embodiments of the present utility model;

[0043] Figure 7 is a schematic partial structural view of the heat exchanger in some other embodiments of the present utility model.

[0044] REFERENCE MARKS:

[0045] 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 water inlet; 202, Second water inlet; 203, First water outlet; 204, Second water outlet; 21, First water inlet pipe; 22, Second water inlet pipe; 23, First water outlet pipe; 24, Second water outlet pipe; 110, First flow channel; 120, Second flow channel; 31, First diversion groove; 32, Second diversion groove; 42, First confluence groove; 44, Second confluence groove; 41, Rib; 10a, First partition component; 10b, Second partition component; 11, First partition; 101, First notch; 12, Second partition; 102, Second notch; 13, Third partition; 103, Third notch; 14, Fourth partition; 104, Fourth notch; 401, First sealing groove; 402, Second sealing groove; 43, Sealing structure; 431, First sealing part; 432, Second sealing part. Detailed implementation mode

[0046] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where 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 drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0047] Combined with Figure 1 and Figure 2 , the heat exchanger 100 according to the embodiment of the present invention includes: a housing and a plurality of heat exchange tubes 20. The housing is provided with a first diversion groove 31, a first confluence groove 42 and a heat exchange space. The heat exchange space is arranged 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, exchange heat and then be discharged from the first confluence groove 42, so as to achieve the heat exchange effect.

[0048] Furthermore, combined with Figures 1 to 3, A plurality of heat exchange tubes 20 are arranged in the heat exchange space. A first flow channel 110 communicating the first shunt groove 31 and the first confluence groove 42 is constructed inside the heat exchange tubes 20, and a second flow channel 120 heat-exchange cooperating with the first flow channel 110 is constructed outside the heat exchange tubes 20. That is to say, the heat exchanger 100 has two flow channels, and the first heat exchange medium and the second heat exchange medium can 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 the energy utilization rate. In addition, the first shunt groove 31 and the first confluence groove 42 can communicate with the first flow channel 110, so that the first flow channel 110 and the second flow channel 120 can be separated, and the first flow channel 110 and the second flow channel 120 can flow independently, preventing water cross-flow between the flow channels and ensuring that the water quality of the flow channels is not polluted.

[0049] Combined with Figure 2 , In some embodiments of the present utility model, 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 arranged at both ends of the heat exchange space. Both ends of the plurality of heat exchange tubes 20 respectively penetrate through the first partition component 10a and the second partition component 10b. Thus, the first partition component 10a can separate the first shunt 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 and the housing are of an integral structure. The first partition component 10a is provided with a first partition member 11 and a second partition member 12. The first partition member 11 and the second partition member 12 extend along the width direction of the housing (see the left-right direction in Figure 2 ), and are opposite to each other along the length direction of the housing (see the front-back direction in Figure 2 ).

[0050] The heat exchange space is provided with a second shunt groove 32 and a second confluence groove 44. The second shunt groove 32 communicates with one end of the plurality of second flow channels 120, and the second confluence groove 44 communicates with the other end of the plurality of second flow channels 120. That is to say, the second shunt groove 32 and the second confluence groove 44 for realizing shunt and confluence are arranged at both ends of the second flow channel 120, which is beneficial to further separate the second flow channel 120 from the first flow channel 110 and is beneficial to improving the heat exchange effect of the heat exchange medium. The first partition component 10a is arranged between the first shunt groove 31 and the second shunt groove 32, and the second partition component 10b is arranged between the first confluence groove 42 and the second confluence groove 44.

[0051] Furthermore, combined with Figure 2, a first boss 111 is provided on the inner side of the housing. The first boss 111 is provided between the first confluence groove 42 and the second confluence groove 44. The first boss 111 protrudes relative to the bottom surfaces of the first confluence groove 42 and the second confluence groove 44, which can provide support for the heat exchange tubes 20, improve the structural stability of the heat exchange space, and also improve the overall structural strength of the housing.

[0052] In some embodiments of the present utility model, the second partition assembly 10b and the housing are of an integral structure. The second partition assembly 10b is provided with a third partition 13 and a fourth partition 14. The third partition 13 and the fourth partition 14 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 arranged at intervals between the first confluence groove 42 and the second confluence groove 44. The third partition 13 and the fourth partition 14 can separate the first confluence groove 42 and the second confluence groove 44 to realize the independent flow of the first flow channel 110 and the second flow channel 120.

[0053] The first partition 11 and the second partition 12 are arranged at intervals between the first diversion groove 31 and the second diversion groove 32. Thus, the first partition 11 and the second partition 12 can separate the first diversion groove 31 and the second diversion groove 32 to realize the independent flow of the first flow channel 110 and the second flow channel 120.

[0054] Further, in order to improve the partitioning effect between the first diversion groove 31 and the second diversion groove 32, and the partitioning effect between the first confluence groove 42 and the second confluence groove 44, a first sealing groove 401 is constructed between the first partition 11 and the second partition 12. The housing is provided with a first opening 121 communicating with the first sealing groove 401 for injecting glue into the first sealing groove 401. A second sealing groove 402 is constructed between the third partition 13 and the fourth partition 14. The housing is provided with a second opening 122 communicating with the second sealing groove 402 for injecting glue into the second sealing groove 402. Among them, the sealing effect is realized by the form of injecting glue to fill the sealing groove, which can reduce the manufacturing difficulty, reduce the space occupied by the sealing member structure, and the filling form can reduce the fitting gap, which is beneficial to improving the sealing effect.

[0055] Combined Figure 2 , for example, in actual application, it can be that the first partition 11 is a side wall of the first diversion groove 31, the second partition 12 is a side wall of the second diversion groove 32, and glue is injected between the two oppositely arranged side walls, thereby simplifying the structure of the heat exchanger 100.

[0056] Combined Figure 6 and Figure 7, in some embodiments of the present utility model, the first partition assembly 10a and the housing are of a split structure, and the heat exchange tube 20 is hermetically connected to the first partition assembly 10a and the housing through a sealing structure 43; the second partition assembly 10b and the housing are of a split structure, and the heat exchange tube 20 is hermetically connected to the second partition assembly 10b and the housing through a sealing structure 43.

[0057] The sealing structure 43 can be configured as a rubber-coated structure. The partition assembly and the heat exchange tube 20 can be arranged in a mold, and liquid rubber can be injected into the mold, which can realize the fixation and sealing of the heat exchange tube 20 and the partition assembly, and can also realize rubber sealing to prevent soft rubber from overflowing during the secondary rubber coating process. After the secondary rubber coating is completed, during the process of further assembling the first partition assembly 10a, the second partition assembly 10a and the heat exchange tube 20 into the housing, the outer periphery (i.e., the side surface, the bottom surface and the top surface) of the sealing structure 43 can be elastically deformed and sealed by extrusion pressure.

[0058] Furthermore, the sealing structure 43 includes a first sealing portion 431 and a second sealing portion 232. The heat exchange tube 20 is hermetically connected to the partition assembly through the first sealing portion 431, and the second sealing portion 232 is hermetically connected to the housing. The second sealing portion 232 includes a plurality of sealing protrusions, and the sealing protrusions elastically abut against the housing.

[0059] Specifically, the first sealing portion 431 and the second sealing portion 432 can be obtained respectively during the first rubber coating and the second rubber coating processes, that is, the first sealing portion 431 is obtained during the first rubber coating to realize the fixed connection between the heat exchange tube 20 and the partition assembly, and the partition assembly can be used for rubber sealing to prevent soft rubber from overflowing during the second rubber coating process. During the second rubber coating process, the second sealing portion 432 can be formed by wrapping around the outer periphery of the partition assembly. The second sealing portion 432 elastically abuts against the housing to realize the sealing between the heat exchange assembly 20 and the housing. As Figure 6 and Figure 7 shown, furthermore, the second sealing portion 432 includes a plurality of sealing protrusions, and the sealing protrusions elastically abut against the housing.

[0060] Even further, in combination with Figure 2 and Figure 3, the first separator 11 is provided with a plurality of first notches 101, the second separator 12 is provided with a plurality of second notches 102, the plurality of first notches 101 and the plurality of second notches 102 are arranged opposite to each other, and the first end of the heat exchange tube 20 passes through the first notch 101 and the second notch 102 to communicate with the first flow dividing groove 31; the third separator 13 is provided with a plurality of third notches 103, the fourth separator 14 is provided with a plurality of fourth notches 104, the plurality of third notches 103 and the plurality of fourth notches 104 are arranged opposite to each other, and the second ends of the plurality of heat exchange tubes 20 pass through the third notch 103 and the fourth notch 104 to communicate with the first confluence groove 42. That is to say, both ends of the plurality of heat exchange tubes 20 pass through the second flow dividing groove 32 and the second confluence groove 44 respectively, and the sealing structure can form a seal between the heat exchange tube 20 and the housing, so that the medium in the second flow channel 120 will not enter the second flow dividing groove 32 and the first confluence groove 42 from the gap between the heat exchange tube 20 and the housing. Among them, the opposite ends of the heat exchange tube 20 pass through the first notch 101 and the third notch 103 respectively. Therefore, the first notch 101 and the third notch 103 can be configured into a shape suitable for cooperating with the end of the heat exchange tube 20 to improve the connection effect. For example, in combination with 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 into a comb-shaped structure to conform to the flat tube.

[0061] In some embodiments of the present invention, the first notch 101 is in clearance fit with the heat exchange tube 20, and the clearance is less than 0.1 mm. The second notch 102 is in clearance fit with the heat exchange tube 20, and the clearance is less than 0.1 mm. The third notch 103 is in clearance fit with the heat exchange tube 20, and the clearance is less than 0.1 mm. The fourth notch 104 is in clearance fit with the heat exchange tube 20, and the clearance is less than 0.1 mm. Specifically, the above clearances can prevent the filled sealant from flowing through, so that the sealant forms a tight wrapping and restraining relationship between the separator and the heat exchange tube 20, thereby improving the sealing effect.

[0062] In combination with Figure 3, in some embodiments of the present utility model, it is also possible to first assemble the housing and the heat exchange tube 20, and then inject glue into the sealing groove to achieve the sealing between the housing and the heat exchange tube 20. Specifically, the housing is provided with a first sealing groove 401 and a second sealing groove 402. A plurality of heat exchange tubes 20 are disposed through the first sealing groove 401, and the glue for sealing is filled in the first sealing groove 401; a plurality of heat exchange tubes 20 are disposed through the second sealing groove 402, and the glue for sealing is filled in the second sealing groove 402. Thus, by providing the first sealing groove 401 and the second sealing groove 402, and passing the heat exchange tube 20 through the first sealing groove 401 and the second sealing groove 402, glue can be filled into the sealing groove. The sealing groove can define the setting position of the seal and also define the filling capacity of the seal, so that the seal can fully fill the gap between the housing and the heat exchange tube 20 in the sealing groove, improving the sealing effect and facilitating the control of the filling amount of the seal. During assembly, the heat exchange tube 20 can be first assembled to the housing, and the glue or adhesive is respectively filled into the first sealing groove 401 and the second sealing groove 402. Thus, the glue or adhesive can wrap between the housing and the heat exchange tube 20 in the first sealing groove 401 and the second sealing groove 402, thereby forming a seal.

[0063] In some embodiments of the present utility model, 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 is beneficial to improving the heat exchange effect. A plurality of heat exchange tubes 20 are arranged side by side along the width direction of the heat exchanger 100, and a plurality of heat exchange tubes 20 can be arranged in the housing, which is beneficial to improving the efficiency.

[0064] More specifically, in some embodiments of the present utility model, 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.

[0065] In addition, the plurality of 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 is beneficial to improving the space utilization rate.

[0066] More specifically, one end of multiple first flow channels 110 can communicate with the first flow dividing groove 31, and the other end can communicate with the first flow collecting groove 42. In this way, after the first heat exchange medium enters from the first flow dividing groove 31 at the water inlet end, it can flow into multiple first flow channels 110. After the first heat exchange medium exchanges heat in the multiple first flow channels 110, it can be collected in the first flow collecting groove 42 and then discharged, so that the first heat exchange medium can fully contact the heat exchange space to improve the heat exchange effect. One end of multiple second flow channels 120 can communicate with multiple second flow dividing grooves 32, and the other end can communicate with the second flow collecting groove 44. In this way, after the second heat exchange medium enters from the second flow dividing groove 32 at the water inlet end, it can enter the multiple second flow channels 120. After the second heat exchange medium exchanges heat in the multiple second flow channels 120, it can be collected in the second flow collecting groove 44 and then discharged, so that the second heat exchange medium can fully contact the heat exchange space to improve the heat exchange effect.

[0067] In some embodiments of the present invention, the first flow channels 110 and the second flow channels 120 are spaced apart along the width direction of the housing. The first flow dividing groove 31 and the second flow dividing groove 32 extend along the width direction and are distributed along the length direction of the housing. Thus, the first flow dividing groove 31 can communicate with one end of the first flow channels 110 arranged along the width direction, and the second flow dividing groove 32 can communicate with one end of the second flow channels 120 arranged along the width direction. Similarly, the first flow collecting groove 42 and the second flow collecting 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 channels 110 and the second flow channels 120 can communicate with the first flow collecting groove 42 and the second flow collecting groove 44. The first flow dividing groove 31 and the second flow dividing groove 32 are distributed along the length direction of the housing and extend along the width direction. The first flow collecting groove 42 and the second flow collecting groove 44 are distributed along the length direction of the housing and extend along the width direction. This can not only achieve the effects of flow division and flow collection at the opposite ends of the first flow channels 110 and the second flow channels 120, but also improve the layout compactness, facilitate increasing the extension length of the flow channels, and improve the heat exchange effect.

[0068] Combined with the foregoing, the second flow channels 120 are constructed between two adjacent heat exchange tubes 20. Therefore, the distance between two adjacent heat exchange tubes 20 determines the flow rate of the second flow channels 120. The distance between two adjacent heat exchange tubes 20 is greater than 0.5 mm, which can facilitate the flow of the medium. When the heat exchanger 100 is applied to a dishwasher, the second flow channels 120 can be used to circulate the washing water. There may be impurities in the washing water. Therefore, increasing the cross-sectional area of the second flow channels 120 can facilitate the flow of the sewage and facilitate the discharge of the sewage. Combined Figure 4 , the distance between two adjacent heat exchange tubes 20 is L, and L can be 0.6 mm, 0.8 mm or 1 mm, etc.

[0069] In some embodiments of the present utility model, 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.

[0070] Optionally, the heat exchanger 100 may include a first seal and a second seal. The first seal is in sealing cooperation with the housing and is provided with a plurality of first mounting holes. The plurality of heat exchange tubes 20 respectively pass through the plurality of first mounting holes. Thus, the first seal can fill the gap between the housing and the heat exchange tube 20 to form a seal, and is beneficial to improving the structural stability of the heat exchange tube 20. That is to say, the first mounting holes can be the same shape as the heat exchange tube 20 to improve the sealing effect. The first seal can be in extrusion fit or interference fit with the housing and the seal, so as to improve the sealing effect. Similarly, the second seal is in sealing cooperation with the housing and is provided with a plurality of second mounting holes. The plurality of heat exchange tubes 20 respectively pass through the plurality of second mounting holes to improve the sealing performance, and the second seal can be used to fix the heat exchange tube 20 to improve the structural stability. The second seal can be in extrusion fit or interference fit with the housing and the seal, so as to improve the sealing effect. For example, during assembly, the first seal can be first installed into the housing, 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, so that the second seal can be installed on the housing. The first seal and the second seal are in interference fit with the housing and the heat exchange tube 20 to achieve sealing. For example, the first seal and the second seal can be flexible parts.

[0071] Combined Figure 2 and Figure 3 , in some embodiments of the present utility model, one end of the housing is provided with a first water inlet 201 and a second water inlet 202, and the other end of the housing is provided with a first water outlet 203 and a second water outlet 204; the plurality of heat exchange tubes 20 communicate the first water inlet 201 and the first water outlet 203, and the second flow channel 120 communicates the second water inlet 202 and the second water outlet 204. Thus, the first water inlet 201 and the first water outlet 203 can communicate with the first flow channel 110, and the second water inlet 202 and the second water outlet 204 can communicate with the second flow channel 120, so that the circulation of two heat exchange media can be realized. Therefore, two water inlets and water outlets are respectively arranged at the water inlet end and the water outlet end, which can facilitate connecting different media, construct different heat exchange channels, and is beneficial to improving the heat exchange effect.

[0072] Both ends of the heat exchange tube 20 are respectively connected to the first water inlet 201 and the first water outlet 203, which can increase the water inflow and improve the heat exchange effect. A heat exchange channel is formed between the heat exchange tube 20 and the housing, and the heat exchange channel is connected to the second water inlet 202 and the second water outlet 204. In other words, the first water inlet 201, the heat exchange tube 20, and the first water outlet 203 in the heat exchanger 100 are connected, and a heat exchange flow path can be constructed. The second water inlet 202, the heat exchange channel, and the second water outlet 204 are connected, and another heat exchange flow path can be constructed. Thus, two heat exchange flow paths can be constructed in the heat exchanger 100, which is beneficial to improving the heat recovery efficiency. It can also be that the first water inlet 201 and the first water outlet 203 are connected to an external pipeline, the second water inlet 202 and the second water outlet 204 are connected to another external pipeline, and the heat exchange channel is arranged between the heat exchange tube 20 and the housing, which can realize the heat exchange between the two heat exchange flow paths and also improve the structural compactness of the heat exchanger 100.

[0073] More specifically, a second flow channel 120 is formed between multiple heat exchange tubes 20 and the housing. The second flow channel 120 includes the flow channels constructed jointly by the inner wall of the housing and between two adjacent heat exchange tubes 20, and the flow channels constructed between the innermost heat exchange tube 20 in the housing and the inner wall of the housing. These flow channels are interconnected with each other, so that the second flow channel 120 can fill the heat exchanger 100, and the second flow channel 120 can be in full contact with 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 improving the heat exchange efficiency and energy utilization rate.

[0074] In actual application, the first medium flows into the first diversion tank 31 through the first water inlet 201, sequentially enters into multiple heat exchange tubes 20 along the first diversion tank 31, then enters the first confluence tank 42 through the first flow channel 110 constructed by the heat exchange tubes 20, and enters the first water outlet 203 along the first confluence tank 42. Thus, the flow mode of the first kind of water flow in the heat exchanger 100 is completed.

[0075] The second medium enters the second diversion tank 32 through the second water inlet 202, sequentially enters into multiple second flow channels 120 along the second diversion tank 32, then enters the second confluence tank 44 at the other end, and enters the second water outlet 204 along the second confluence tank 44. Thus, the flow mode of the second kind of water flow in the heat exchanger 100 is completed; the two water flows flow in a non-contact manner in the heat exchanger 100 at the same time, thereby realizing high-efficiency heat exchange. Among them, the first medium can be clean water and / or low-temperature water, and the second medium water can be sewage and / or high-temperature water.

[0076] Furthermore, in some embodiments of the present invention, in combination with Figure 2, the housing includes a first water inlet pipe 21 and a second water inlet pipe 22. The first water inlet pipe 21 is connected to the first diversion groove 31; the second water inlet pipe 22 penetrates through the first diversion groove 31 and is connected to the heat exchange space. Thus, the isolation between the first flow channel 110 and the second flow channel 120 can be achieved. When cold water and wastewater with a certain temperature are introduced into the first water inlet pipe 21 and the second water inlet pipe 22, the effect of cold and hot water isolation can be achieved at the water inlet end. Similarly, the housing includes a first water outlet pipe 23 and a second water outlet pipe 24. The first water outlet pipe 23 is connected to the first confluence groove 42; the second water outlet pipe 24 penetrates through the first confluence groove 42 and is connected to the heat exchange space. The second water outlet pipe 24 penetrates through the first confluence groove 42, which can isolate cold and hot water at the water outlet end.

[0077] In some embodiments of the present invention, in combination with Figure 2 , the inner walls of the first confluence groove 42 and the second confluence groove 44 are provided with ridges 41. The ridges 41 extend in the same direction as the second flow channel 120. The ridges 41 can play the role of guiding the water flow towards the water outlet in the confluence groove, which is beneficial for drainage.

[0078] In combination with Figure 1 and Figure 2 , in some embodiments of the present invention, the housing includes a bottom shell 10 and a cover plate 113. The cover plate 113 covers the bottom shell 10. The first opening 121 and the 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 can facilitate injecting glue into the sealing groove, thereby facilitating the manufacture of the heat exchanger 100. That is, after the cover plate 113 covers the bottom shell 10, the sealing groove is filled. In this way, the colloid can be fully filled between the cover plate 113 and the bottom shell 10, avoiding, which can improve the sealing effect and also improve the tightness of the connection between the bottom shell 10 and the cover plate 113.

[0079] In some embodiments of the present invention, in combination with Figure 2 and Figure 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 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, facilitating assembly, and having a high stability after assembly.

[0080] In some embodiments of the present invention, the bottom shell 10 is an integral structure, which can facilitate manufacturing, and has strong structural stability, which is beneficial for simplifying the assembly steps of the heat exchanger 100 and reducing the assembly difficulty.

[0081] Furthermore, in combination with Figure 2 and Figure 5, in some embodiments of the present utility model, the second boss 112 is provided with a positioning opening 105, and the protrusion 123 is provided with a positioning platform 124. The positioning platform 124 extends into the positioning opening 105. Thus, the positioning platform 124 can play a limiting role and can also improve the tightness of the cooperation between the cover plate 113 and the bottom shell 10, increasing the contact area between the cover plate 113 and the bottom shell 10.

[0082] Combined Figure 4 with Figure 5 , the inner wall structure of the cover plate 113 is the same as the structure of the bottom wall of the bottom shell 10. After the cover plate 113 covers the bottom shell 10, a receiving cavity is constructed. The cover plate 113 and the bottom shell 10 can jointly wrap the heat exchange tube 20, and 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 between the cover plate 113 and the bottom shell 10. That is to say, the inner wall of the cover plate 113 can be provided with partition members corresponding to the first partition member 11, the second partition member 12, the third partition member 13, and the fourth partition member 14. When the cover plate 113 covers the bottom shell 10 along the height direction (see Figure 2 the up and down direction in Figure 2 ), the partition members of the cover plate 113 and the partition members of the bottom shell 10 communicate to construct notches, diversion grooves, and confluence grooves. The cover plate 113 is also provided with a rib, and this rib is opposite to the rib 41 inside the bottom shell 10 to improve the drainage effect.

[0083] For example, during actual assembly, it can be that the heat exchange tube 20 is first assembled into the bottom shell 10, and a positioning guide rail is reserved inside the bottom shell 10, and the heat exchange tube 20 can be directly installed at the preset position; then the cover plate 113 and the bottom shell 10 are precisely assembled through the positioning platform 124 and the positioning opening 105, so that the two are assembled to the contact section, and then the bottom shell 10 and the cover plate 113 are tightly connected (airtight / watertight) through ultrasonic welding / flange gasket fastening / platen welding, etc., as Figure 1 shown. Further, the first sealant and the second sealant (such as glue) are filled or poured into the gaps formed by the bottom shell 10, the cover plate 113, and the plurality of heat exchange tubes 20 through the first opening 121 and the second opening 122, and the height of the sealant is flush with the upper cover. Finally, the heat exchanger 100 is placed in a vacuum machine to remove the internal air holes of the glue to achieve a more tightly sealed state.

[0084] According to the dishwasher of the embodiments of the present utility model, by applying the aforementioned heat exchanger 100 in the dishwasher, the waste heat recovery effect of the dishwasher can be improved, which is beneficial to improving the cleaning effect of the dishwasher.

[0085] In some embodiments of the present utility model, the dishwasher further includes: a water tank and an inner tank. The inner tank includes a washing cavity which can communicate with the water tank. A first water inlet 201 and a first water outlet 203 communicate with the washing cavity, and a second water inlet 202 and a second water outlet 204 communicate with the water tank.

[0086] Specifically, the washing cavity can communicate with the water tank, thereby supplying water to the washing cavity to achieve the cleaning of tableware. Among them, the first water inlet 201 and the first water outlet 203 communicate with the washing cavity, so that the high-temperature liquid in the washing cavity can circulate in the first flow channel 110 through the first water inlet 201 and the first water outlet 203. The second water inlet 202 and the second water outlet 204 communicate with the water tank, so that the liquid in the water tank can circulate in the second flow channel 120, thereby realizing the heat exchange between the liquid in the washing cavity and the liquid in the water tank and realizing the waste heat recovery of the liquid in the washing cavity.

[0087] In specific applications, when the heat exchanger 100 is applied to the dishwasher for waste heat recovery, the liquid in the water tank flows through the first water inlet 201 to the first diversion groove 31, and after being diverted by the first diversion groove 31, it flows to the first flow channel 110, and then flows from the first flow channel 110 to the first confluence groove 42, and flows out of the first water outlet 203 under the confluence action of the first confluence groove 42 to realize the flow of the low-temperature side flow path; the high-temperature liquid in the washing cavity enters the second diversion groove 32 through the second water inlet 202, enters the second flow channel 120 under the diversion action of the second diversion groove 32, and then flows from the second flow channel 120 to the second confluence groove 44, and flows out of the second water outlet 204 under the confluence action of the second confluence groove 44 to realize the flow of the high-temperature side flow path. Among them, the liquid in the washing cavity of the dishwasher is a liquid with a higher temperature, and the liquid in the water tank is a liquid with a lower temperature. Therefore, through the above heat exchange cycle, the temperature of the liquid in the water tank is increased, that is, the waste heat recovery of the liquid in the dishwasher is realized, the heat utilization rate of the dishwasher is improved, and the energy consumption of the dishwasher is reduced. Specifically, the liquid in the washing cavity is heated during the main washing stage of the dishwasher, so the temperature is higher.

[0088] It can be understood that the dishwasher includes at least a main washing stage and a rinsing stage. During the main washing stage, the liquid is transported to the washing cavity of the dishwasher and heated to improve the cleaning effect of the kitchen utensils in the washing cavity; during the rinsing stage, the kitchen utensils are cleaned with clean water to improve the cleaning degree. Among them, the water used in the rinsing stage is heated after heat exchange with the high-temperature water in the main washing stage, thereby improving the rinsing effect on the kitchen utensils and shortening the rinsing time.

[0089] Optionally, the width direction of the heat exchanger 100 can refer to Figure 2 the left-right direction in Figure 2In the front-rear direction, the thickness direction of the heat exchanger 100 can refer to Figure 2 the up-down direction in

[0090] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "bottom", "inner", "outer" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0091] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0092] In the present invention, unless otherwise clearly specified and defined, the terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0093] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0094] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0095] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A heat exchanger (100), characterized in that: include: A shell, the shell being provided with a first diverter groove (31), a first converging groove (42) and a heat exchange space, the heat exchange space being provided between the first diverter groove (31) and the first converging groove (42); A plurality of heat exchange tubes (20) are arranged in the heat exchange space, a first flow channel (110) is constructed inside the heat exchange tube (20) and is connected to the first branch groove (31) and the first confluence groove (42), and a second flow channel (120) is constructed outside the heat exchange tube (20) and cooperates with the first flow channel (110) for heat exchange.

2. The heat exchanger (100) according to claim 1, characterized in that: The heat exchanger (100) further comprises a first partition component and a second partition component, wherein the first partition component and the second partition component are respectively arranged at two ends of the heat exchange space, and two ends of the plurality of heat exchange tubes (20) are respectively passed through the first partition component and the second partition component.

3. The heat exchanger (100) according to claim 2, characterized in that: The first partition assembly and the shell are of an integrated structure, the first partition assembly comprises 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 and are distributed along the length direction of the shell; And / or, the second partition component is an integrated structure with the shell, and the second partition component includes a third partition (13) and a fourth partition (14), and the third partition (13) and the fourth partition (14) extend along the width direction of the shell and are distributed along the length direction of the shell.

4. The heat exchanger (100) according to claim 3, characterized in that: A first sealing groove (401) is constructed between the first partition (11) and the second partition (12), and the housing is provided with a first opening (121) in communication with the first sealing groove (401) for injecting glue into the first sealing groove (401); And / or, a second sealing groove (402) is constructed between the third partition (13) and the fourth partition (14), and the shell is provided with a second opening (122) connected to the second sealing groove (402) for injecting glue into the second sealing groove (402).

5. The heat exchanger (100) according to claim 2, characterized in that: The first partition component and the shell are of a split structure, and the heat exchange tube (20) is sealedly connected to the first partition component and the shell via a sealing structure (43); The second partition component and the shell are of a split structure, and the heat exchange tube (20) is sealedly connected to the second partition component and the shell via a sealing structure (43).

6. The heat exchanger (100) according to claim 5, characterized in that: The sealing structure (43) comprises a first sealing portion (431) and a second sealing portion (432); the heat exchange tube (20) is sealedly connected to the first partition assembly via the first sealing portion (431); and the second sealing portion (432) is sealedly connected to the shell.

7. The heat exchanger (100) according to claim 6, characterized in that: The second sealing portion (432) comprises a plurality of sealing protrusions, and the sealing protrusions are elastically in contact with the shell.

8. The heat exchanger (100) according to claim 2, characterized in that: The first partition component is provided with a plurality of first notches (101), and the first end of the heat exchange tube (20) is penetrated by the first notch (101); the second partition component is provided with a plurality of third notches (103), and the second end of the heat exchange tube (20) is penetrated by the third notch (103).

9. The heat exchanger (100) according to claim 8, characterized in that: The first notch (101) and the heat exchange tube (20) are clearance-matched; and / or The third notch (103) is clearance-matched with the heat exchange tube (20).

10. The heat exchanger (100) according to claim 1, characterized in that: The heat exchange space is provided with a second diverter groove (32) and a second converging groove (44), wherein the second diverter groove (32) is connected to one end of the plurality of second flow channels, and the second converging groove (44) is connected to the other end of the plurality of second flow channels (120).

11. The heat exchanger (100) according to claim 10, characterized in that: The shell is provided with a first partition component and a second partition component, the first partition component is provided between the first diverter groove (31) and the second diverter groove (32), and the second partition component is provided between the first confluence groove (42) and the second confluence groove (44).

12. The heat exchanger (100) according to claim 10, characterized in that: A first boss (111) is provided on the inner side surface of the shell, the first boss (111) is provided between the first confluence groove (42) and the second confluence groove (44), and the first boss (111) protrudes relative to the bottom surface of the first confluence groove (42) and the bottom surface of the second confluence groove (44).

13. The heat exchanger (100) according to claim 1, characterized in that: The shell comprises a bottom shell (10) and a cover plate (113), wherein the cover plate (113) covers the bottom shell (10), a second boss (112) is provided on the bottom wall of the shell, and a protrusion (123) is provided on the inner wall of the cover plate (113), wherein the protrusion (123) is opposite to the second boss (112) along an assembly direction, and when the cover plate (113) covers the shell, the protrusion (123) abuts against the second boss (112).

14. The heat exchanger (100) according to claim 13, characterized in that: The second boss (112) is provided with a positioning opening (105), the protrusion (123) is provided with a positioning platform (124), and the positioning platform (124) extends into the positioning opening (105); and / or The bottom shell (10) is an integrated structure.

15. The heat exchanger (100) according to claim 10, characterized in that: A first water inlet (201) and a second water inlet (202) are provided at one end of the shell, and a first water outlet (203) and a second water outlet (204) are provided at the other end of the shell; the first flow channel (110) is connected to the first water inlet (201) and the first water outlet (203), and the second flow channel (120) is connected to the second water inlet (202) and the second water outlet (204).

16. The heat exchanger (100) according to claim 15, characterized in that: The first water inlet (201) and the first water outlet (203) are in communication with the first diversion channel (31), the first flow channel (110) and the first confluence channel (42); The second water inlet (202) and the second water outlet (204) are in communication with the second diversion channel (32), the second flow channel (120) and the second confluence channel (44).

17. The heat exchanger (100) according to claim 1, characterized in that: The shell comprises a first water inlet pipe (21) and a second water inlet pipe (22), the first water inlet pipe (21) being connected to the first diverter groove (31); the second water inlet pipe (22) passing through the first diverter groove (31) being connected to the heat exchange space; and / or The shell comprises a first water outlet pipe (23) and a second water outlet pipe (24), the first water outlet pipe (23) being connected to the first confluence groove (42); the second water outlet pipe (24) passing through the first confluence groove (42) being connected to the heat exchange space; and / or The heat exchange tube (20) extends along the length direction of the heat exchanger (100), and the plurality of heat exchange tubes (20) are arranged side by side along the width direction of the heat exchanger (100); and / or The plurality of heat exchange tubes (20) are arranged at intervals along the width direction of the heat exchanger (100); and / or The dimension of the second flow channel (120) along the width direction of the heat exchanger (100) is greater than 0.5 mm; and / or The wall thickness of the heat exchange tube (20) is greater than 0.4 mm.

18. A dishwasher, characterized in that: include: A heat exchanger (100) according to any one of claims 1 to 17.

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