Dish washing machine

Abstract

The utility model belongs to the technical field of kitchen appliances, and discloses a dish washing machine. The dishwasher comprises a water cup, a water pump and a condenser. The water pump communicates with the water cup; the condenser comprises a heat exchange pipe, a first fluid channel and a second fluid channel are formed in the heat exchange pipe, the inlet end of the first fluid channel communicates with the water pump, the outlet end of the first fluid channel communicates with the water cup, and the second fluid channel is used for containing a heat exchange medium; the heat exchange pipe comprises at least two first pipe sections and at least one second pipe section, and the at least two first pipe sections are arranged in parallel in the depth direction of the dish washing machine; the ends of every two adjacent first pipe sections are connected through a second pipe section. The heat exchange tube is bent and extends, so that the length of the heat exchange tube is guaranteed, the overall size of the heat exchange tube can be reduced, and the heat exchange effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a dishwasher. Background Technology

[0002] With increasingly stringent energy efficiency requirements for dishwashers, a technology has emerged that uses a heat pump system to heat the washing water, significantly reducing energy consumption. These products require a condenser to exchange heat between the refrigerant and the washing water.

[0003] Due to space limitations inside dishwashers, the effective heat exchange area of ​​the condenser inside dishwashers is currently small, resulting in poor heat exchange performance. Furthermore, there are issues with limited installation space for the condenser and difficulties in disassembly and assembly. Utility Model Content

[0004] The purpose of this invention is to provide a dishwasher that can solve the problems of poor heat exchange effect of the condenser and the limited installation space and difficulty in disassembly and assembly of the condenser.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A dishwasher, comprising:

[0007] Water cup;

[0008] A water pump is connected to the water cup;

[0009] A condenser includes a heat exchange tube, in which a first fluid channel and a second fluid channel are formed. The inlet end of the first fluid channel is connected to the water pump, and the outlet end of the first fluid channel is connected to the water cup. The second fluid channel is used to contain the heat exchange medium.

[0010] The heat exchange tube includes:

[0011] At least two first pipe segments are arranged in parallel along the depth direction of the dishwasher;

[0012] The second pipe segment connects the ends of two adjacent first pipe segments.

[0013] As an alternative to the aforementioned dishwasher, two adjacent first pipe segments are located on the same side of the length direction of the connected second pipe segment, forming a U-shape;

[0014] Alternatively, two adjacent first pipe segments are located on opposite sides of the length of the connected second pipe segment, forming an N-shape.

[0015] As an alternative to the aforementioned dishwasher, the first pipe section extends in a straight line or in a curved direction.

[0016] As an alternative to the aforementioned dishwasher, the heat exchange tube includes an outer tube and an inner tube passing through the outer tube, wherein a first fluid channel is formed inside the inner tube, and a second fluid channel is formed between the outer tube and the inner tube.

[0017] As an alternative to the aforementioned dishwasher, a flow guide is provided in the second fluid channel, which is used to guide the heat exchange medium to flow in a zigzag manner.

[0018] The flow guide extends spirally around the axis of the inner tube, or the flow guide includes a plurality of flow guide rings sleeved on the inner tube, the plurality of flow guide rings being spaced apart along the axial direction of the inner tube, each flow guide ring being provided with a through hole, and the through holes on two adjacent flow guide rings being staggered.

[0019] As an alternative to the aforementioned dishwasher, the flow guide is disposed in the first pipe section.

[0020] As an alternative to the dishwasher described above, the inner tube includes at least two first inner tubes disposed opposite to each other and a second inner tube connecting two adjacent first inner tubes;

[0021] The outer tube includes at least two opposing first outer tubes and a second outer tube connecting two adjacent first outer tubes. The first outer tube is sleeved outside the first inner tube, and the second outer tube is sleeved outside the second inner tube.

[0022] As an alternative to the dishwasher described above, the inner tube includes at least two first inner tubes disposed opposite to each other and a second inner tube connecting two adjacent first inner tubes;

[0023] The outer tube includes at least two opposing first outer tubes, the first outer tubes being sleeved on the first inner tube;

[0024] The heat exchange tube also includes a connecting pipe, the two ends of which are respectively connected to two adjacent first outer tubes.

[0025] As an alternative to the aforementioned dishwasher, the two axial ends of the heat exchange tube are a first end and a second end, respectively. The first fluid channel forms a first inlet end at the first end and a first outlet end at the second end. The second fluid channel forms a second outlet end at the first end and a second inlet end at the second end.

[0026] As an alternative to the dishwasher described above, the dishwasher further includes a support member that supports and elevates the condenser to form an installation space below at least a portion of the condenser, the installation space being used to accommodate a refrigerant pipe communicating with the second fluid passage.

[0027] The beneficial effects of this utility model are:

[0028] In the dishwasher provided by this utility model, the heat exchange tube of the condenser includes at least two parallel first tube segments and a second tube segment connecting two adjacent first tube segments. This allows the heat exchange tube to bend and extend, which helps to ensure the length of the heat exchange tube and thus the heat exchange area. At the same time, it can reduce the overall size of the heat exchange tube, which helps to reduce the size of the condenser. The installation space required for the condenser is reduced, which makes it easier to install in the dishwasher and reduces the difficulty of operation. The first tube segment extends along the depth direction of the dishwasher, making full use of the space in the depth direction of the dishwasher and helping to extend the length of the first tube segment, thereby improving the heat exchange effect. Attached Figure Description

[0029] Figure 1 This is a partial structural schematic diagram of the dishwasher provided in Embodiment 1 of this utility model;

[0030] Figure 2 This is a perspective view of a condenser provided in Embodiment 1 of this utility model;

[0031] Figure 3 This is a schematic diagram of another condenser provided in Embodiment 1 of this utility model.

[0032] In the picture:

[0033] 10. Housing; 20. Condenser; 21. Outer tube; 22. Inner tube; 221. First inner tube; 222. Second inner tube; 231. Medium inlet tube; 232. Medium outlet tube; 233. Connecting tube; 24. Flow guide; 30. Water pump; 40. Water cup; 50. Support; 51. Base plate; 52. Support section. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] Example 1

[0039] like Figure 1 As shown, this embodiment provides a dishwasher, including a body, a spray mechanism, a water pump 30, and a heat pump assembly. The body includes a casing 10, an inner tub located within the casing 10, and a water cup 40. A washing chamber is formed within the inner tub, which can hold tableware or cookware to be washed. The washing chamber is connected to the water cup 40. The inlet of the water pump 30 is connected to the water cup 40, and the outlet of the water pump 30 is connected to the heat pump assembly. The heat pump assembly is connected to the water cup 40 to form a heating circuit for the washing water. The heated washing water flows through the water cup 40 to the spray mechanism, which sprays water into the washing chamber to clean the tableware or cookware. By heating the washing water with the heat pump assembly and using the heated washing water to spray and clean the cookware or tableware, the cleaning effect is good. The heat pump assembly has high energy efficiency, which helps to reduce energy consumption.

[0040] The heat pump assembly includes a compressor, an evaporator, and a condenser 20. The evaporator, compressor, and condenser 20 are connected in sequence to form a circulating heat exchange channel for the heat exchange medium. The heat exchange medium in the circulating heat exchange channel can exchange heat with the washing water to transfer heat to the washing water and achieve the function of heating the washing water.

[0041] Specifically, the washing water and the heat exchange medium exchange heat in the condenser 20. The condenser 20 includes heat exchange tubes, within which a first fluid channel and a second fluid channel are formed. The first fluid channel connects to the water pump 30 and the water cup 40 to form a circulating heating channel for heating the washing water. The second fluid channel connects to the compressor and the heat exchanger to form a circulating heat exchange channel for containing the heat exchange medium. The washing water and the heat exchange medium exchange heat in the condenser 20 to achieve the heating of the washing water.

[0042] When the dishwasher is running, the wash water is pressurized by the water pump 30 and enters the condenser 20, where it exchanges heat with the heat exchange medium. After being heated, the wash water returns to the water cup 40 and then enters the spray mechanism. The spray mechanism sprays the wash water onto the dishes or cookware in the washing chamber, and the wash water on the dishes or cookware collects in the water tank at the bottom of the washing chamber. This cycle continues until the washing process is complete.

[0043] Optionally, the water cup 40 includes a cup body and a water distribution valve connected to the cup body. A water collection tank is formed inside the cup body, which is connected to the washing chamber and the inlet of the water pump 30. The water distribution valve is connected to the spray mechanism and the outlet of the condenser 20. The washing water heated by the condenser 20 is sprayed into the washing chamber through the water distribution valve and the spray mechanism.

[0044] To reduce the space occupied by the condenser 20 while ensuring its effective heat exchange area, thereby improving the heating effect on the washing water, such as... Figure 2 As shown, the condenser 20 includes a heat exchange tube, which comprises at least two first tube segments arranged in parallel along the depth direction of the dishwasher and at least one second tube segment. The ends of two adjacent first tube segments are connected through the second tube segment, so that at least two first tube segments are connected in series through the second tube segment. This arrangement allows the heat exchange tube to extend in a curved manner, which reduces the size of the heat exchange tube compared to a straight extension, while ensuring the heat exchange length, thereby guaranteeing the effective heat exchange area and improving the heat exchange effect. The first tube segments extend along the depth direction of the dishwasher, making full use of the space in the depth direction of the dishwasher, which helps to extend the length of the first tube segments, thereby improving the heat exchange effect.

[0045] It should be noted that when using the dishwasher, the front-to-back direction of the dishwasher is the same as the depth direction, with the user positioned in front of the dishwasher as the reference point. In other words, the first pipe segment extends along the front-to-back direction of the dishwasher, and at least two first pipe segments are spaced apart along the width direction of the dishwasher.

[0046] In this embodiment, two first pipe segments are provided, and one corresponding second pipe segment is provided. In other embodiments, the number of first pipe segments can be set as needed, for example, three, four or more, and the number of second pipe segments can be adjusted according to the number of first pipe segments.

[0047] In this embodiment, the two first pipe sections are located on the same side of the length direction of the second pipe section, so that the heat exchange tube is U-shaped. This arrangement ensures that the axial ends of the heat exchange tube are located on the same side of the second pipe section, that is, the beginning and end of the first fluid channel and the beginning and end of the second fluid channel are both located on the same side of the second pipe section. The pipe arrangement is relatively concentrated, the structure is more compact, and it is convenient to control the overall size of the dishwasher.

[0048] In other embodiments, the two first pipe sections can be located on opposite sides of the length of the second pipe section, so that the heat exchange tubes are N-shaped. This arrangement places the axial ends of the heat exchange tubes on opposite sides of the second pipe section; that is, the beginning and end of the first fluid channel are located on opposite sides of the second pipe section, with a relatively large distance between them. Similarly, the beginning and end of the second fluid channel are both located on opposite sides of the second pipe section, with a relatively large distance between them. This relatively dispersed pipe arrangement provides ample operating space and facilitates assembly.

[0049] In this embodiment, the first pipe segment extends in a straight line. In other embodiments, the first pipe segment may also extend in a curved shape to further increase the heat exchange length.

[0050] To form a first fluid channel and a second fluid channel, the heat exchange tube includes an outer tube 21 and an inner tube 22 passing through the outer tube 21. A first fluid channel is formed inside the inner tube 22, and a second fluid channel is formed between the inner tube 22 and the outer tube 21.

[0051] To improve heat exchange efficiency, a flow guide 24 is provided within the second fluid channel. This flow guide 24 divides the space within the second fluid channel, guiding the fluid to flow in a tortuous manner, thereby increasing the heat exchange length. In this condenser 20, the first and second fluid channels contain two fluids to be exchanged. By providing the flow guide 24, the travel distance of the fluid flowing within the second fluid channel is extended, which helps to increase the heat exchange time between the two fluids, ensuring sufficient heat exchange and guaranteeing the heat exchange effect. Furthermore, by designing the second fluid channel to extend the heat exchange time and guarantee the heat exchange effect, the size of the condenser 20 can be reduced, facilitating its installation in a dishwasher and simplifying operation.

[0052] In this embodiment, the first fluid channel is connected to the water pump 30 and the water cup 40, respectively, and the second fluid channel is connected to the compressor and the evaporator. That is, the first fluid channel carries washing water, while the second fluid channel carries the heat exchange medium. Since the first fluid channel is formed by the inner tube 22, and the inner wall of the inner tube 22 is smooth, the washing water flows more smoothly within the first fluid channel, preventing the deposition of dirt and impurities in the washing water, thereby ensuring the flow rate of the washing water and its hygiene. Specifically, the first fluid channel is connected to the water distribution valve of the water cup 40, so that the heated washing water is directly supplied to the spray mechanism through the water distribution valve.

[0053] In other embodiments, a first fluid channel may be formed between the inner tube 22 and the outer tube 21, and correspondingly, a second fluid channel may be formed inside the inner tube 22, which can also ensure the heat exchange effect between the washing water and the heat exchange medium.

[0054] Optionally, the flow guide 24 is disposed within the first pipe section. The first pipe section extends along the depth direction of the dishwasher and has a relatively large length, serving as the main heat exchange location for the heat exchange tubes. By disposing of the flow guide 24 within the first pipe section, the washing water and the heat exchange medium can be fully exchanged, resulting in a good heat exchange effect.

[0055] like Figure 2 As shown, in this embodiment, the flow guide 24 extends spirally around the axis of the inner tube 22. By providing the spirally extending flow guide 24, the formed second fluid channel can extend spirally, and the heat exchange medium can flow spirally around the axis of the inner tube 22, which can increase the flow path of the heat exchange medium, thereby facilitating sufficient heat exchange between the heat exchange medium and the washing water and improving the heat exchange effect.

[0056] It is understandable that the flow guide 24 can contact the outer wall of the inner tube 22 and the inner wall of the outer tube 21 respectively, so that all heat exchange media flow downstream in a spiral manner, and the flow path of the heat exchange media is the same, thus avoiding disturbance of the flow of the heat exchange media.

[0057] Optionally, the flow guide 24 can be a thin sheet to reduce the thickness of the flow guide 24, thereby increasing the effective flow space between the inner tube 22 and the outer tube 21 and ensuring the flow rate of the heat exchange medium.

[0058] In this embodiment, the guide vane is connected to the outer wall of the inner tube 22. That is, the guide vane can be an integral structure with the inner tube 22 to improve the stability of the condenser 20 structure. In other embodiments, the guide vane 24 can also be connected to the inner wall of the outer tube 21.

[0059] To improve the heat exchange efficiency between the washing water and the heat exchange medium, the inner tube 22 can be made of metal, as metal has good thermal conductivity, which is beneficial for improving heat exchange efficiency. Optionally, the inner tube 22 can be made of copper. Optionally, the outer tube 21 can be a corrugated pipe.

[0060] To reduce the space occupied by the condenser 20, in this embodiment, the inner tube 22 is U-shaped, specifically including two first inner tubes 221 arranged opposite each other and a second inner tube 222 connecting the two first inner tubes 221; the outer tube 21 includes two first outer tubes, which are sleeved outside the first inner tubes 221, and a flow guide 24 is provided between the first inner tubes 221 and the outer tubes 21 to form two second fluid channels. The first outer tubes and the first inner tubes 221 constitute the first pipe segment, and the second inner tube 222 constitutes the second pipe segment.

[0061] In this embodiment, the outer tube 21 only mates with the first inner tube 221 of the inner tube 22, facilitating the assembly of the outer tube 21 and the inner tube 22. To connect the second fluid channels on both sides, the condenser 20 also includes a connecting pipe 233, which is connected to both first outer tubes respectively. This allows the heat exchange medium to flow through one section of the second fluid channel and then enter the second fluid channel at the other end through the connecting pipe 233 for further heat exchange, thereby improving the heat exchange effect.

[0062] like Figure 2 As shown, the end of the second fluid channel near the second inner tube 222 is closed, and a through hole is provided on the outer circumferential surface of the first outer tube near the edge of the second inner tube 222. The connecting pipe 233 is connected to the through hole on the first outer tube to connect the two sections of the second fluid channel.

[0063] The first outer tube is a circular tube structure with openings at both ends. The end of the first outer tube closest to the second inner tube 222 is closed by a guide member 24. Specifically, the guide member 24 includes a cover plate at one end and a spiral body connected to the cover plate. The cover plate extends circumferentially around the inner tube 22, i.e., the cover plate is an annular structure. The spiral body is connected to the cover plate and extends spirally around the axis of the inner tube 22. The inner diameter of the cover plate is adapted to the outer diameter of the inner tube 22, and the outer diameter of the cover plate is adapted to the inner diameter of the first outer tube, so as to close the annular opening between the first outer tube and the inner tube 22.

[0064] To facilitate the connection between the second fluid channel and the evaporator and compressor, the end of the first outer tube away from the second inner tube 222 is a closed structure. Among the two first outer tubes, one of the first outer tubes has an inlet on the outer peripheral wall of the end away from the second inner tube 222, and the other first outer tube has an outlet at the end away from the second inner tube 222. The inlet is used to connect to the compressor, and the outlet is used to connect to the evaporator.

[0065] Optionally, the inlet is connected to a medium inflow pipe 231, and the outlet is connected to a medium outflow pipe 232 to facilitate connection with the evaporator or compressor.

[0066] Optionally, the annular gap between the end of the first outer tube away from the second inner tube 222 and the inner tube 22 can be closed by the guide member 24, which will not be elaborated here.

[0067] To improve heat exchange efficiency, the flow direction of the fluid in the first fluid channel can be opposite to that in the second fluid channel. Specifically, the heat exchange tube has a first end and a second end at its axial ends. The first fluid channel forms a first inlet end at the first end and a first outlet end at the second end. The fluid in the first fluid channel flows from the first inlet end to the first outlet end, that is, from the first end of the heat exchange tube to the second end. The second fluid channel forms a second outlet end at the first end and a second inlet end at the second end. The fluid in the second fluid channel flows from the second inlet end to the second outlet end, that is, from the second end of the heat exchange tube to the first end. This reverses the flow direction of the washing water and the heat exchange medium, which is beneficial for improving heat exchange efficiency.

[0068] In some embodiments, such as Figure 3 As shown, both the inner tube 22 and the outer tube 21 can be U-shaped tubes. That is, the inner tube 22 includes two first inner tubes 221 arranged opposite each other and a second inner tube 222 connecting the two first inner tubes 221. The outer tube 21 includes two first outer tubes arranged opposite each other and a second outer tube connecting the two first outer tubes. The first outer tube is sleeved on the first inner tube 221, and the second outer tube is sleeved on the second inner tube 222. Exemplarily, the flow guide 24 can only cover the first inner tube 221 of the inner tube 22, and the second fluid channel is generally U-shaped and spirally extends at the first inner tube 221. There is an annular flow channel between the outer tube 21 and the second inner tube 222 of the inner tube 22. Exemplarily, the flow guide 24 can also cover both the first inner tube 221 and the second inner tube 222 of the inner tube 22, that is, the second fluid channel between the outer tube 21 and the inner tube 22 both extend spirally.

[0069] Combination Figure 1 As shown, in this embodiment, the dishwasher also includes a support member 50, which supports and elevates the condenser 20, creating an installation space below at least a portion of the condenser 20. This installation space accommodates a refrigerant pipe connecting to a second fluid channel, allowing the second fluid channel to connect to both the compressor and the evaporator. By elevating the condenser 20 and utilizing the space below it to house the refrigerant pipes, compared to the prior art where the refrigerant pipes and condenser 20 are laid flat, the horizontal space occupied by the heat pump assembly within the dishwasher is reduced, resulting in a more compact structure. This avoids affecting the placement space of other components, improves product functionality, and simplifies installation.

[0070] In addition, raising the condenser 20 can reduce the distance between the condenser 20 and the water cup 40, making it easier for the two to connect, reducing the length of the pipe between them, which helps to save space and reduce costs.

[0071] Specifically, the housing 10 includes a base, an inner liner is disposed above the base, and a support member 50 is disposed on the base. The support member 50 can lift the condenser 20 off the surface of the base, so that the condenser 20 is located above the base. There is a gap below the condenser 20 to form an installation space.

[0072] In this embodiment, the support member 50 includes a base plate 51 and a support part 52. The base plate 51 is disposed on the base, and the support part 52 protrudes from the base plate 51. The bottom end of the support part 52 is connected to the base plate 51, and the top end of the support part 52 supports the condenser 20. An installation space is formed between the condenser 20 and the base plate 51.

[0073] Optionally, the base plate 51 can be fixed to the base to improve the stability of the condenser 20. For example, the base plate 51 can be fixed to the base by fasteners such as screws, or the base plate 51 can also be fixed to the base by snap-fit ​​or magnetic adsorption.

[0074] In order to create an installation space below at least part of the condenser 20, the top of the support 52 contacts only a portion of the surface of the condenser 20, so that the part of the condenser 20 that does not contact the support 52 is suspended, thereby creating an installation space.

[0075] In this embodiment, the support 52 is a support plate with a relatively small thickness, so that the area of ​​the condenser 20 that is not in contact with the support plate is large, thereby forming a larger installation space. To reduce costs, the support plate can be a hollow structure to reduce material usage and the weight of the support 50.

[0076] To improve the support effect of the support member 50 on the condenser 20, two support parts 52 are provided. The two support parts 52 are parallel and spaced apart. The two support parts 52 cooperate to support the condenser 20 and prevent the condenser 20 from shaking. Specifically, the support part 52 is made of a heat exchange tube, and the top surface of the support part 52 can be an arc surface that matches the outer peripheral surface of the heat exchange tube.

[0077] In other embodiments, the number of support portions 52 may be three, four or more, and the specific number of support portions 52 may be set according to actual needs.

[0078] Example 2

[0079] This embodiment provides a dishwasher, which differs from Embodiment 1 in the structure of the flow guide 24.

[0080] In this embodiment, the flow guide 24 includes multiple flow guide rings sleeved outside the inner tube 22. These multiple flow guide rings are spaced apart along the axial direction of the inner tube 22, and each flow guide ring has a through hole. The through holes on adjacent flow guide rings are staggered. The fluid in the second flow guide channel needs to pass through the multiple flow guide rings sequentially via the through holes. Because the through holes on adjacent flow guide rings are staggered, the flow direction of the fluid changes multiple times during the flow process, which can prolong the fluid's flow path, increase the heat exchange time, and improve heat exchange efficiency.

[0081] Understandably, the guide ring abuts against the outer wall of the inner tube 22 and the inner wall of the outer tube 21 respectively, in order to separate the space on both sides of the guide ring and ensure that the fluid can only flow through the through hole.

[0082] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A dishwasher, characterized in that, include: Water cup (40); A water pump (30) is connected to the water cup (40); The condenser (20) includes a heat exchange tube, in which a first fluid channel and a second fluid channel are formed. The inlet end of the first fluid channel is connected to the water pump (30), and the outlet end of the first fluid channel is connected to the water cup (40). The second fluid channel is used to contain the heat exchange medium. The heat exchange tube includes: At least two first pipe segments are arranged in parallel along the depth direction of the dishwasher; The second pipe segment connects the ends of two adjacent first pipe segments.

2. The dishwasher according to claim 1, characterized in that, Two adjacent first pipe segments are located on the same side of the length direction of the connected second pipe segment, forming a U-shape; Alternatively, two adjacent first pipe segments are located on opposite sides of the length of the connected second pipe segment, forming an N-shape.

3. The dishwasher according to claim 1, characterized in that, The first pipe segment extends in a straight line or in a bend.

4. The dishwasher according to any one of claims 1-3, characterized in that, The heat exchange tube includes an outer tube (21) and an inner tube (22) passing through the outer tube (21). The first fluid channel is formed inside the inner tube (22), and the second fluid channel is formed between the outer tube (21) and the inner tube (22).

5. The dishwasher according to claim 4, characterized in that, The second fluid channel is provided with a flow guide (24), which is used to guide the heat exchange medium to flow in a zigzag manner; The flow guide (24) extends spirally around the axis of the inner tube (22), or the flow guide (24) includes a plurality of flow guide rings sleeved on the inner tube (22), the plurality of flow guide rings are spaced apart along the axial direction of the inner tube (22), each flow guide ring is provided with a through hole, and the through holes on two adjacent flow guide rings are staggered.

6. The dishwasher according to claim 5, characterized in that, The flow guide (24) is disposed on the first pipe section.

7. The dishwasher according to claim 4, characterized in that, The inner tube (22) includes at least two first inner tubes (221) arranged opposite to each other and a second inner tube (222) connecting two adjacent first inner tubes (221); The outer tube (21) includes at least two first outer tubes arranged opposite each other and a second outer tube connecting two adjacent first outer tubes. The first outer tube is sleeved outside the first inner tube (221), and the second outer tube is sleeved outside the second inner tube (222).

8. The dishwasher according to claim 4, characterized in that, The inner tube (22) includes at least two first inner tubes (221) arranged opposite to each other and a second inner tube (222) connecting two adjacent first inner tubes (221); The outer tube (21) includes at least two oppositely arranged first outer tubes, which are sleeved on the first inner tube (221); The heat exchange tube also includes a connecting pipe (233), the two ends of which are respectively connected to two adjacent first outer tubes.

9. The dishwasher according to any one of claims 1-3, characterized in that, The heat exchange tube has two axial ends, namely a first end and a second end. The first fluid channel forms a first inlet end at the first end and a first outlet end at the second end. The second fluid channel forms a second outlet end at the first end and a second inlet end at the second end.

10. The dishwasher according to any one of claims 1-3, characterized in that, The dishwasher also includes a support (50) that supports and elevates the condenser (20) to form an installation space below at least a portion of the condenser (20), the installation space being used to accommodate a refrigerant pipe communicating with the second fluid passage.

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