Heat exchange device and dish washing machine
By using light-transmitting materials with a light transmittance of 25% or higher in heat exchangers and dishwashers, the problem of flow channel blockage was solved, enabling intuitive detection and efficient unblocking of blockage points.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
- Filing Date
- 2024-10-10
- Publication Date
- 2026-04-10
AI Technical Summary
In existing heat exchangers and dishwashers, the first flow channel is prone to clogging due to contamination, making it difficult to efficiently locate and clear the blockage.
The light-transmitting part of the first tube is made of a light-transmitting material with a light transmittance of greater than or equal to 25%, and it is aligned with the second tube so that the blockage point of the first flow channel can be directly observed.
The design of the light-transmitting section enables efficient detection and removal of blockages in heat exchangers and dishwashers, improving unblocking efficiency.
Smart Images
Figure CN121817756A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of heat exchange technology, and more particularly to a heat exchange device and a dishwasher. Background Technology
[0002] The heat exchange device includes an outer tube and an inner tube, with the inner tube nested inside the outer tube. The outer tube has a first flow channel, and the inner tube has a second flow channel. The inner tube forms part of the wall of the first flow channel, and the outer tube forms part of the wall of the first flow channel. Fluids at different temperatures exchange heat through the wall of the inner tube in the first and second flow channels. In related technologies, the fluid in the first flow channel may become contaminated during long-term operation, causing blockage in the first flow channel. Efficiently identifying the blockage point is an important issue in this field. Summary of the Invention
[0003] Therefore, this application provides a heat exchange device, comprising a first tube and a second tube, wherein the first tube is at least partially sleeved outside the second tube; the heat exchange device has a first flow channel, the first tube being a portion of the wall of the first flow channel, the second tube being a portion of the wall of the first flow channel, and the second tube having a second flow channel; the first tube includes a light-transmitting portion comprising a light-transmitting material, the light-transmitting portion being at least partially aligned with the second tube, and the light transmittance of the light-transmitting material being greater than or equal to 25%. The setting of the light transmittance of the light-transmitting material being greater than or equal to 25% allows for direct observation of blockages in the first flow channel from the light-transmitting portion, efficiently locating blockage points in the heat exchange device.
[0004] This application provides a dishwasher, which includes a heat exchange device comprising a first tube and a second tube, wherein the first tube is at least partially sleeved outside the second tube; the heat exchange device has a first flow channel, the first tube forming part of the wall of the first flow channel, the second tube forming part of the wall of the first flow channel, and the second tube having a second flow channel; the first tube includes a light-transmitting portion comprising a light-transmitting material, the light-transmitting portion being at least partially aligned with the second tube, and the light transmittance of the light-transmitting material being greater than or equal to 25%. The setting of a light transmittance of greater than or equal to 25% allows for direct observation of blockages in the first flow channel through the light-transmitting portion, efficiently locating fluid blockage points in the heat exchange device of the dishwasher. Attached Figure Description
[0005] Figure 1 A perspective view of a heat exchange device is provided for one embodiment of this application;
[0006] Figure 2 for Figure 1 A schematic cross-sectional view of the heat exchange device shown.
[0007] Figure 3 for Figure 1An exploded schematic diagram of the heat exchange device shown.
[0008] Figure 4 for Figure 1 An exploded schematic diagram of the heat exchange device shown from another angle;
[0009] Figure 5 An enlarged schematic diagram of a latch in a heat exchange device is provided for one embodiment of this application;
[0010] Figure 6 for Figure 1 A schematic diagram of the heat exchange device from another angle;
[0011] Figure 7 for Figure 1 A cross-sectional view of the heat exchange device and an enlarged view of part A are shown.
[0012] Figure 8 for Figure 1 A schematic diagram of the heat exchange device from another angle.
[0013] Figure 9 A partial schematic diagram of a heat exchange device is provided for one embodiment of this application;
[0014] Figure 10 A partial schematic diagram of a dishwasher is provided for one embodiment of this application. Detailed Implementation
[0015] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all technical solutions consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.
[0016] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.
[0017] It should be understood that the terms "first," "second," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one; "multiple" indicates two or more. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects.
[0018] The heat exchanger of an exemplary embodiment of this application will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features in the following embodiments and technical solutions can complement or combine with each other.
[0019] The heat exchange device 100 includes a first tube 2 and a second tube 3, with the first tube 2 at least partially fitted outside the second tube 3. The heat exchange device 100 has a first flow channel 23, with the first tube 2 forming part of the wall of the first flow channel 23 and the second tube 3 forming part of the wall of the first flow channel 23. The second tube 3 has a second flow channel 31. When the heat exchange device 100 is working, the refrigerant flows in the second flow channel 31, and water flows in the first flow channel 23. The heat exchange between the water and the refrigerant occurs through the wall of the second tube 3. When the heat exchange device 100 is used in a dishwasher, the water becomes turbid during the dishwasher's washing process, which may cause blockage in the first flow channel 23. Therefore, those skilled in the art need to efficiently locate the blockage and clear it.
[0020] The heat exchange device 100 of this application includes a first tube 2 and a second tube 3, wherein the first tube 2 is at least partially fitted outside the second tube 3. For example, combined with Figure 4 and Figure 6 As shown, the second pipe body 3 has a main body 311, an inlet end 312, and an outlet end 313. The inlet of the second pipe body 3 is located at the inlet end 312, and the outlet of the second pipe body 3 is located at the outlet end 313. The main body 311 is located inside the first pipe body 2, and both the inlet end 312 and the outlet end 313 are located outside the first pipe body 2. Figure 1 As shown, the heat exchange device has a first flow channel 23 located between a first tube 2 and a second tube 3. Specifically, the first flow channel 23 is located between the inner wall of the first tube 2 and the outer wall of the second tube 3, and the second tube 3 has a second flow channel 31. In one embodiment, the first tube 2 includes a light-transmitting portion 28, which includes a light-transmitting material. The light-transmitting portion 28 is at least partially aligned with the second tube 3. Specifically, the plane perpendicular to the heat exchange device 100 in the first direction Y is defined as the first projection plane, for example... Figure 4As shown, the first direction Y can be parallel to the thickness direction T. The orthographic projection of the light-transmitting part 28 on the first projection plane at least partially coincides with the orthographic projection of the second tube 3 on the first projection plane. The light transmittance of the light-transmitting material is greater than or equal to 25%, which means that the light-transmitting part 28 on the first tube 2 is a visible part, and the blockage point inside the first flow channel 23 can be directly seen from the outside, thereby efficiently locating the blockage point. In some embodiments, the first flow channel 23 is at least partially located between the light-transmitting part 28 and the second tube 3. In some embodiments, the light-transmitting part 28 is aligned with the main body 311 of the second tube 3.
[0021] Furthermore, in one embodiment, such as Figure 1 As shown, the light-transmitting part 28 is at least partially exposed to the outside world, making it convenient to directly observe the blockage points inside the first flow channel 23.
[0022] To facilitate the installation of the second tube 3 inside the first tube 2, in one embodiment, such as Figure 3 As shown, the first tube body 2 includes a first shell 21 and a second shell 22. The first shell 21 and the second shell 22 are fixedly connected. Along the thickness direction T of the heat exchange device 100, the first shell 21 is at least partially located on one side of the second shell 22. The first shell 21 includes at least a light-transmitting part 28. The first shell 21 and the second shell 22 are welded together. Further, the second shell 22 includes at least a light-absorbing part 29. The light-transmitting part 28 and the light-absorbing part 29 are welded together to achieve a better welding effect.
[0023] When the first housing 21 and the second housing 22 are welded, in one embodiment, as follows: Figure 3 and Figure 7 As shown, the light-transmitting portion 28 has a groove 211 that is recessed in a direction away from the second tube body 3. The light-absorbing portion 29 includes a boss 221 that protrudes in a direction away from the second tube body 3. The boss 221 is at least partially located in the groove 211. A gap 2211 exists between the boss 221 and the groove 211. This arrangement facilitates and securely installs the first housing 21 and the second housing 22. In one embodiment, as shown... Figure 2 As shown, along the thickness direction T of the heat exchange device 100, the first housing 21 is at least partially located on one side of the second housing 22. For example, the first housing 21 is located above the second housing 22. When the first housing 21 and the second housing 22 are laser welded, the laser enters from near the groove 211 of the first housing 21. At this time, the boss 221 partially melts and fills the gap 2211, so that the groove 211 and the boss 221 are fused and welded together.
[0024] Furthermore, the first tube body 2 is made of thermoplastic material. Specifically, the first shell 21 is any one of polypropylene plastic, polyethylene plastic, polyvinyl chloride plastic, and polyamide; the second shell 22 is any one of polypropylene plastic, polyethylene plastic, polyvinyl chloride plastic, and polyamide; and the second tube body 3 is made of metal. The light-absorbing part 29 may be made of thermoplastic material with added dark powder, such as black pigment.
[0025] In one embodiment, the first housing 21 is made entirely of transparent material, that is, the first housing 21 is a visible housing, and the second housing 22 is an overall light-absorbing housing.
[0026] The heat exchanger 100 includes a first inlet pipe 222, which is connected to a first flow channel 23. Specifically, the first inlet pipe 222 is used for fluid to enter the first flow channel 23; in one embodiment, such as Figure 3 As shown, in order to improve the sealing performance of the heat exchange device 100 and facilitate manufacturing, the first inlet pipe 222 is disposed on the second housing 22, and the first inlet pipe 222 and the second housing 22 are an integral part.
[0027] To improve the heat exchange uniformity of the heat exchange device 100, a surface parallel to the thickness direction T of the heat exchange device 100 is defined as the second projection plane. The center of the orthographic projection of the wall of the first flow channel 23 on the second projection plane coincides with the center of the orthographic projection of the wall of the second flow channel 31 on the first projection plane. For example, the orthographic projections of the wall of the first flow channel 23 and the wall of the second flow channel 31 on the second projection plane are both circular, that is, the first tube 2 and the second tube 3 are coaxially arranged. The distance from the fluid to the inner wall of the first tube 2 in the first flow channel 23 is equal, and the flow resistance of the fluid is equal, thus improving the heat exchange uniformity.
[0028] In one implementation, such as Figure 5 As shown, the first tube 2 includes a latch 32, and a portion of the second tube 3 is connected to the latch 32 for positioning. The latch 32 is used to fix the position of the second tube 3. Specifically, as shown... Figure 5 As shown, the buckle 32 is located on the second housing 22. The buckle 32 includes a first sub-buckle 321 and a second sub-buckle 322. There is a gap 323 between the first sub-buckle 321 and the second sub-buckle 322, and part of the second tube 3 is located in the gap 323.
[0029] The heat exchanger 100 includes a second inlet pipe 35, which is connected to a second flow channel 31. Essentially, the second inlet pipe 35 is used for fluid to enter the second flow channel 31. In one embodiment, such as... Figure 4 As shown, in order to improve the sealing performance of the second pipe body 3, at least a portion of the second inlet pipe 35 is integrally formed with the second pipe body 3, such as... Figure 7As shown, the second inlet pipe 35 penetrates the first housing 21; the first housing 21 includes a fixed pipe 25, which is integral with the first housing 21, and the second inlet pipe 35 penetrates the fixed pipe 25, with the wall of the second inlet pipe 35 being sealed to the fixed pipe 25.
[0030] Since the wall of the second inlet pipe 35 needs to be sealed to the opening of the fixed pipe 25, in one embodiment, such as Figure 7 As shown, the heat exchange device 100 includes a sealing component 5, which is at least partially located within the fixed pipe 25. The sealing component 5 is connected to a second inlet pipe 35, which passes through the sealing component 5. To facilitate the installation of the sealing component 5, in one embodiment, for example... Figure 7 and Figure 3 As shown, the sealing component 5 is cylindrical and includes a first opening 51, a second opening 52, and a third opening 53. Along the thickness direction T of the heat exchange device 100, the second opening 52 is located between the first opening 51 and the third opening 53. The sealing component 5 extends at least partially from the first opening 51 to the second opening 52 and then to the third opening 53. The first opening 51 is located outside the fixed tube 25, the third opening 53 is located inside the fixed tube 25, and the second opening 52 is at least partially located inside the fixed tube 25. The second opening 52 is sealed to the fixed tube 25.
[0031] In one implementation, such as Figure 2 and Figure 8 As shown, the fixing tube 25 includes a limiting part 251, which is located away from the boss 221 relative to the groove 211; the limiting part 251 is connected to the first opening 51. The limiting part 251 abuts against the sealing member 5, specifically, as shown... Figure 9 As shown, the first opening 51 includes a bottom end 511, which is far away from the third opening 53 relative to the second opening 52. The limiting part 251 includes a top end 252, which is far away from the second tube 3 relative to the first tube 2. The bottom end 511 abuts against the top end 252.
[0032] Specifically, the plane perpendicular to the thickness direction T of the heat exchange device 100 is defined as the third projection plane. The orthographic projection of the second opening 52 on the third projection plane is located within the orthographic projection of the first opening 51 on the third projection plane. The orthographic projection of the second opening 52 on the third projection plane is located within the orthographic projection of the third opening 53 on the third projection plane. Simply put, the sealing component 5 is a cylindrical shape that is large at both ends and small in the middle.
[0033] How can the heat exchange device 100 reduce its size without reducing heat exchange efficiency? In one embodiment, for example... Figure 4As shown, the second tube 3 includes a first tube 36, a second tube 37, and a third tube 38. The first tube 36 and the second tube 37 are both straight tubes, while the third tube 38 is a U-shaped tube. One end of the first tube 36 is connected to one end of the third tube 38, and the other end of the second tube 37 is connected to the other end of the third tube 38. The extending direction of the first tube 36 is parallel to the extending direction of the second tube 37. That is, the second tube 3 can be a U-shaped tube, and it can be formed by connecting multiple U-shaped tubes. In one embodiment, the second tube 3 is integrally formed. The shape of the first tube 2 can be the same as the shape of the second tube 3.
[0034] Furthermore, in one embodiment, for example Figure 1 and Figure 6 As shown, the first tube body 2 includes a first surface 26 and a second surface 27. Along the thickness direction T of the heat exchange device 100, the first surface 26 and the second surface 27 are located on opposite sides of the first tube body 2, and at least one of the first surface 26 and the second surface 27 is a plane perpendicular to the thickness direction T. That is, the first tube body 2 can be plate-shaped, and the volume of the first tube body 2 is reduced in the thickness direction T of the heat exchange device 100 compared to the arc-shaped or irregular first surface 26 or second surface 27.
[0035] To reduce the weight of the heat exchanger 100, in one embodiment, for example... Figure 1 As shown, the heat exchange device 100 has through holes 29, which penetrate the first tube 2. There are multiple through holes 29. The first tube 2 between the through holes 29 is equivalent to a reinforcing rib. That is to say, while reducing the weight of the heat exchange device 100, the compressive strength of the first tube 1 is not reduced.
[0036] When the heat exchanger 100 is no longer in use, to facilitate the complete drainage of water, the heat exchanger 100 includes a third tube 6, which is connected to the second housing 22. Further, in one embodiment, for example… Figure 8 As shown, the third tube 6 and the second shell 22 are integral parts. Specifically, the third tube 6 has a third flow channel 61, which is connected to the first flow channel 23. Along the direction of gravity G, the third flow channel 61 is lower than the first flow channel 23 so that all fluid can be discharged.
[0037] This application provides a dishwasher, such as Figure 10As shown, the dishwasher includes a heat exchange device 100, which includes a first tube 2 and a second tube 3. The first tube 2 is at least partially fitted outside the second tube 3. The heat exchange device has a first flow channel 23, with the first tube 2 forming part of the wall of the first flow channel 23 and the second tube 3 forming part of the wall of the first flow channel 23. The second tube 3 has a second flow channel 31. The first tube 2 includes a light-transmitting portion 28, which includes a light-transmitting material. The light-transmitting portion 28 is at least partially aligned with the second tube 3, and the light transmittance of the light-transmitting material is greater than or equal to 25%. During long-term use of the dishwasher, the water in the first flow channel 23 is easily contaminated, leading to a risk of blockage. The light transmittance of the light-transmitting material being greater than or equal to 25% allows the blockage points inside the first flow channel 23 to be directly visible from the outside, thus facilitating efficient location of the blockage points.
[0038] Although the technical solutions of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these technical solutions without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A heat exchange device, characterized in that, The heat exchange device (100) includes a first tube (2) and a second tube (3), wherein the first tube (2) is at least partially sleeved outside the second tube (3); The heat exchange device has a first flow channel (23), the first tube (2) is part of the wall of the first flow channel (23), the second tube (3) is part of the wall of the first flow channel (23), and the second tube (3) has a second flow channel (31); The first tube (2) includes a light-transmitting part (28), the light-transmitting part (28) includes a light-transmitting material (281), the light-transmitting part (28) is at least partially aligned with the second tube (3), and the light transmittance of the light-transmitting material (281) is greater than or equal to 25%.
2. The heat exchange device according to claim 1, characterized in that, The light-transmitting portion (28) is at least partially exposed to the outside world; The first tube body (2) includes a first shell (21) and a second shell (22), the first shell (21) and the second shell (22) are fixedly connected, and along the thickness direction of the heat exchange device (100), the first shell (21) is at least partially located on one side of the second shell (22); The first housing (21) includes at least a portion of the light-transmitting portion (28), and the second housing (22) includes at least a portion of the light-absorbing portion (29), the light-absorbing portion (29) including a light-absorbing material (291), and the light-transmitting portion (28) and the light-absorbing portion (29) are welded together.
3. The heat exchange device according to claim 2, characterized in that, The light-transmitting part (28) has a groove (211) that is recessed in a direction away from the second tube body (3), and the light-absorbing part (29) includes a boss (221) that protrudes in a direction away from the second tube body (3), and the boss (221) is at least partially located in the groove (211).
4. The heat exchange device according to claim 2, characterized in that, The heat exchange device (100) includes a first inlet pipe (222), the pipe of the first inlet pipe (222) is connected to the first flow channel (23), the first inlet pipe (222) is disposed in the second shell (22), and the first inlet pipe (222) and the second shell (22) are an integral part.
5. The heat exchange device according to any one of claims 1-4, characterized in that, The surface parallel to the thickness direction of the heat exchange device (100) is defined as the second projection surface. The center of the wall of the first flow channel (23) in the second projection surface coincides with the center of the wall of the second flow channel (31) in the first projection surface. The first tube (2) includes a buckle (32), and a portion of the second tube (3) is limitedly connected to the buckle (32).
6. The heat exchange device according to any one of claims 2-4, characterized in that, The heat exchange device (100) includes a second inlet pipe (35), the pipe of the second inlet pipe (35) is connected to the second flow channel (31), at least part of the second inlet pipe (35) and the second pipe body (3) are integral parts, and the second inlet pipe (35) penetrates the first shell (21); The first housing (21) includes a fixed tube (25), the first housing (21) is an integral piece, the second inlet tube (35) passes through the fixed tube (25), and the wall of the second inlet tube (35) is sealed to the fixed tube (25).
7. The heat exchange device according to claim 6, characterized in that, The heat exchange device (100) includes a sealing component (5), which is at least partially located inside the fixed tube (25). The sealing component (5) is connected to the second inlet tube (35), which passes through the sealing component (5). The sealing component (5) includes a first opening (51), a second opening (52) and a third opening (53). Along the thickness direction of the heat exchange device (100), the second opening (52) is located between the first opening (51) and the third opening (53). The first opening (51) is located outside the fixed tube (25), the third opening (53) is located inside the fixed tube (25), and the second opening (52) is at least partially located inside the fixed tube (25). A plane perpendicular to the thickness direction of the heat exchange device (100) is defined as the third projection plane. The orthographic projection of the second opening (52) on the third projection plane is located within the orthographic projection of the first opening (51) on the third projection plane. The orthographic projection of the second opening (52) on the third projection plane is located within the orthographic projection of the third opening (53) on the third projection plane. The second opening (52) is sealed to the fixed tube (25). The fixing tube (25) includes a limiting part (251), which is away from the boss (221) relative to the groove (211); the limiting part (251) is connected to the first opening (51).
8. The heat exchange device according to any one of claims 1-4, characterized in that, The first tube body (2) is made of thermoplastic material, and the first shell (21) is made of any one of polypropylene plastic, polyethylene plastic, polyvinyl chloride plastic, and polyamide. The second housing (22) is any one of polypropylene plastic, polyethylene plastic, polyvinyl chloride plastic, and polyamide; The second tube (3) is made of metal.
9. The heat exchange device according to any one of claims 1-4, characterized in that, The second tube body (3) includes a first tube (36), a second tube (37) and a third tube (38). The first tube (36) and the second tube (37) are both straight tubes, and the third tube (38) is a U-shaped tube. The first tube (36) is connected to one end of the third tube (38), and the second tube (37) is connected to the other end of the third tube (38). The first tube body (2) includes a first surface (26) and a second surface (27). Along the thickness direction of the heat exchange device (100), the first surface (26) and the second surface (27) are located on opposite sides of the first tube body (2). At least one of the first surface (26) and the second surface (27) is a plane perpendicular to the thickness direction of the heat exchange device (100).
10. A dishwasher, characterized in that, The dishwasher includes a heat exchange device (100). The heat exchange device (100) includes a first tube (2) and a second tube (3), wherein the first tube (2) is at least partially sleeved outside the second tube (3); The heat exchange device has a first flow channel (23), the first tube (2) is part of the wall of the first flow channel (23), the second tube (3) is part of the wall of the first flow channel (23), and the second tube (3) has a second flow channel (31); The first tube (2) includes a light-transmitting part (28), the light-transmitting part (28) includes a light-transmitting material, the light-transmitting part (28) is at least partially aligned with the second tube (3), and the light transmittance of the light-transmitting material is greater than or equal to 25%.