A PTC water heating device

Abstract

This utility model discloses a PTC water heating device, relating to the technical field of heating equipment. It includes a water chamber assembly and a PTC heating element. The water chamber assembly comprises a detachably connected first water chamber assembly and a second water chamber assembly. A medium flow channel is provided on the first water chamber assembly and / or the second water chamber assembly, and a heat exchange medium is disposed in the medium flow channel. The PTC heating element abuts against the medium flow channel and includes a first electrode, a second electrode, and multiple PTC cores. A quick-release structure is provided between the first electrode and the second electrode, enabling a detachable connection between them. Based on the technical solution disclosed in this utility model, while ensuring that the electrode pins are not misaligned, the positioning accuracy is improved, facilitating subsequent installation and use, and ensuring the creepage distance between the two copper electrodes to ensure electrical performance and safety, while also reducing production costs.

Description

Technical Field

[0001] This utility model relates to the field of heating equipment technology, specifically to a PTC water heating device. Background Technology

[0002] PTC water heating devices are devices that use positive temperature coefficient ceramic heating elements to convert electrical energy into heat energy, thereby achieving efficient temperature control by heating liquids (such as water or coolant). They are widely used in new energy vehicles and home appliances.

[0003] In related technologies, PTC water heating devices typically include a water chamber assembly and a PTC heating element installed inside the water chamber assembly. The PTC heating element can heat the coolant inside the water chamber assembly to provide heat. The PTC heating element generally includes a PTC heating element and two copper electrodes. Conductive plates are welded onto the copper electrodes, and the conductive plates are connected to a power supply module. The conductive plates can fix the copper electrodes and the PTC heating element.

[0004] However, in related technologies, the pins of the two copper electrodes are usually fixed by integral injection molding. On the one hand, the pins may be misaligned during injection molding, resulting in inaccurate positioning and affecting subsequent installation and use; on the other hand, air inside the injection molded part may cause insufficient creepage distance between the two copper electrodes, affecting electrical performance and safety. Moreover, the cost of injection molding is also relatively high, and it urgently needs to be improved. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a PTC water heating device that solves the technical problems of skewed pins, inaccurate positioning, insufficient creepage distance between copper electrodes, and high cost in the existing PTC heating component.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides a PTC water heating device, comprising: A water chamber assembly, comprising a detachably connected first water chamber assembly and a second water chamber assembly, wherein the first water chamber assembly and / or the second water chamber assembly are provided with a medium flow channel, and a heat exchange medium is disposed in the medium flow channel; and The PTC heating element abuts against the medium flow channel and includes a first electrode, a second electrode, and a plurality of PTC cores disposed between the first electrode and the second electrode. An insulating quick-release structure is provided between the first electrode and the second electrode, and the first electrode and the second electrode are detachably connected through the quick-release structure.

[0007] In some embodiments, the quick-release structure includes: A first connecting part is fixedly connected to one end of the first electrode; A bent portion, wherein the bent portion is fixedly connected to the end of the first connecting portion away from the first electrode, and abuts against the side of the second electrode opposite to the first electrode; and The second connecting part is fixedly disposed on the bent part and detachably connected to one end of the second electrode.

[0008] In some embodiments, the bent portion is arranged parallel to the first electrode; or The bent portion is inclined at 1-3° from its connection with the first connecting portion toward the side closer to the first electrode.

[0009] In some embodiments, the bent portion has a support portion on the side of the second connection portion away from the first connection portion, and the support portion has an inclined surface on the side away from the second electrode, the inclined surface being inclined toward the side closer to the first electrode in a direction away from the first connection portion.

[0010] In some embodiments, the second connecting part is a snap-fit, and the second connecting part is fastened to the second electrode.

[0011] In some embodiments, the quick-release structure further includes: A socket is provided, wherein the socket and the first connecting portion are located on opposite sides of the first electrode, and the socket is sleeved on the first electrode and the second electrode.

[0012] In some embodiments, a control panel is fixedly disposed outside the water chamber assembly; and The pin is fixedly mounted on the first electrode and is fixedly connected to the control board.

[0013] In some embodiments, the medium flow channel has a continuous curved structure and is evenly distributed on one side of the first water chamber assembly and / or the second water chamber assembly.

[0014] In some embodiments, the medium flow channel includes: A first medium flow channel is disposed on the first water chamber assembly and abuts against one side of the PTC heating element; and The second medium flow channel is disposed on the second water chamber assembly and abuts against the side of the PTC heating element away from the first medium flow channel; When the first water chamber assembly is connected to the second water chamber assembly, the first medium flow channel is connected to the second medium flow channel.

[0015] In some embodiments, a sealing groove is provided between the first water chamber assembly and the second water chamber assembly, and a sealing element is provided in the sealing groove.

[0016] Compared with existing technologies, the PTC water heating device provided by this utility model detachably connects the first and second electrodes through a quick-release structure to form a PTC heating element. The PTC heating element then abuts against the medium flow channel on the first and / or second water chamber assembly, facilitating heat exchange between the PTC heating element and the heat exchange medium in the medium flow channel. This method abandons the traditional injection molding and insulation methods for copper electrodes, directly achieving connection and insulation through a quick-release structure. While ensuring the electrode leads are not misaligned, it improves positioning accuracy, facilitates subsequent installation and use, and guarantees the creepage distance between the two copper electrodes to ensure electrical performance and safety. Furthermore, it reduces production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the PTC water heating device in one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the first water chamber assembly in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the PTC heating element in one embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the PTC heating element in another embodiment of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. First water chamber assembly; 11. Bottom shell; 12. Lower water chamber; 2. Second water chamber assembly; 21. Middle shell; 211. Sealing groove; 22. Upper water chamber; 3. Shell cover plate; 4. PTC heating element; 41. First electrode; 42. Second electrode; 43. PTC core; 44. Quick-release structure; 441. First connecting part; 442. Bending part; 443. Second connecting part; 444. Bearing part; 445. Socket; 45. Pin; 5. Medium flow channel; 6. Control board; 7. Control chamber; 71. High-voltage connector; 72. Low-voltage connector. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] To address the aforementioned technical problems, this utility model provides a PTC water heating device that improves positioning accuracy while ensuring the electrode pins are not misaligned, facilitates subsequent installation and use, and guarantees the creepage distance between the two copper electrodes to ensure its electrical performance and safety, while also reducing production costs.

[0021] Please see Figure 1 , Figure 1 This is a schematic diagram of the overall structure of a PTC water heating device in one embodiment of the present invention. The PTC water heating device includes a water chamber assembly and a shell cover plate 3. A medium flow channel 5 is provided on the water chamber assembly, and a heat exchange medium is provided in the medium flow channel 5. A PTC heating element 4 is also provided on the inner side of the water chamber assembly, and the PTC heating element 4 abuts against the medium flow channel 5.

[0022] During operation, the PTC heating element 4 generates heat after being powered on and exchanges heat with the heat exchange medium in the medium flow channel 5 to achieve heating.

[0023] In this embodiment, the water chamber assembly includes a first water chamber assembly 1 and a second water chamber assembly 2. The first water chamber assembly 1 and the second water chamber assembly 2 are detachably connected, and the PTC heating element 4 is disposed between the first water chamber assembly 1 and the second water chamber assembly 2.

[0024] Specifically, the first water chamber assembly 1 includes a bottom shell 11 and a lower water chamber 12, with the lower water chamber 12 fixedly disposed inside the bottom shell 11. Similarly, the second water chamber assembly 2 includes a middle shell 21 and an upper water chamber 22, with the upper water chamber 22 fixedly disposed on the side of the middle shell 21 near the bottom shell 11.

[0025] Please see Figure 1-2 The aforementioned medium flow channel 5 includes a first medium flow channel and a second medium flow channel, which are respectively formed on the lower water chamber 12 and the upper water chamber 22. Correspondingly, both the lower water chamber 12 and the upper water chamber 22 are provided with inlets and outlets (not shown in the figure). Taking the first medium flow channel as an example, the heat exchange medium (such as water) can flow into the first medium flow channel from the inlet on the lower water chamber 12 and flow out from the outlet on the lower water chamber 12. The flow mode of the heat exchange medium in the second medium flow channel is the same, so it will not be described again.

[0026] Meanwhile, the first medium flow channel and the second medium flow channel are also provided with interfaces for mutual communication (not shown in the figure). When the first water chamber assembly 1 and the second water chamber assembly 2 are fixedly connected, the first medium flow channel and the second medium flow channel can be connected through the above-mentioned interfaces, so that the temperature of the heat exchange medium in the first medium flow channel and the second medium flow channel remains the same.

[0027] It should be noted that the first and second medium flow channels can be formed by pipelines; taking the first medium flow channel as an example, it can be formed by fixing a pipeline inside the lower water chamber 12. The second medium flow channel can be set on the upper water chamber 22 in the same way, which will not be described in detail here.

[0028] Meanwhile, the shapes of the first medium flow channel and the second medium flow channel can be flexibly designed as needed. For example, in one embodiment, both the first medium flow channel and the second medium flow channel can be set as continuous curved structures, such as continuous S-shaped curved flow channels, so that the first medium flow channel and the second medium flow channel can be evenly distributed on the lower water chamber 12 and the upper water chamber 22, so as to extend the flow path of the heat exchange medium and facilitate full heat exchange.

[0029] Based on this, the bottom shell 11 and the middle shell 21 can be detachably fixed by bolts. When the bottom shell 11 and the middle shell 21 are fixedly connected, the first water chamber assembly 1 and the second water chamber assembly 2 respectively abut against the opposite sides of the PTC heating element 4, so that the first medium flow channel and the second medium flow channel respectively abut against the opposite sides of the PTC heating element 4, which facilitates the heat exchange medium and the PTC heating element 4 to achieve sufficient heat exchange.

[0030] To prevent heat loss, a sealing structure can be provided between the bottom shell 11 and the middle shell 21. For example, in one embodiment, a sealing groove 211 can be provided at the connection between the bottom shell 11 and the middle shell 21, and a sealing element (not shown in the figure) can be provided in the sealing groove 211. The sealing element can be a rubber sealing ring to seal the joint between the first water chamber assembly 1 and the second water chamber assembly 2.

[0031] It is understood that in this embodiment, both the first water chamber assembly 1 and the second water chamber assembly 2 are provided with medium flow channels 5. However, in some other embodiments, the medium flow channels 5 may be provided only on the first water chamber assembly 1 or the second water chamber assembly 2. This depends on the design requirements of a specific occasion and is not specifically limited.

[0032] Taking the example of setting the medium flow channel 5 only on the first water chamber assembly 1, in this case, it is only necessary to ensure that the medium flow channel 5 abuts against the side of the PTC heating element 4 near the first water chamber assembly 1 and can achieve effective heat exchange.

[0033] Please see Figure 1 and Figure 3 In this embodiment, the PTC heating element 4 is located between the first water chamber assembly 1 and the second water chamber assembly 2, and is used to heat the heat exchange medium in the medium flow channel 5.

[0034] Specifically, the PTC heating element 4 includes at least a first electrode 41, a second electrode 42, and multiple PTC cores 43. The first electrode 41 can be an injection-molded copper electrode, the second electrode 42 can be a copper electrode, and the PTC cores 43 can be PTC ceramic thermistors. In actual assembly, the injection-molded copper electrode is arranged parallel to the copper electrode, and the multiple PTC cores 43 can be arranged side-by-side between the injection-molded copper electrode and the copper electrode.

[0035] It is understood that the arrangement of the multiple PTC cores 43 between the first electrode 41 and the second electrode 42 can refer to any existing PTC heating component 4, which belongs to the prior art in this field and is not the focus of this utility model, so it will not be described in detail here.

[0036] Accordingly, the PTC heating element 4 in this embodiment differs from the PTC heating element 4 in related technologies in the structure and connection method of the first electrode 41 and the second electrode 42, as follows: In this embodiment, an insulating quick-release structure 44 is provided between the first electrode 41 and the second electrode 42. The quick-release structure 44 includes a first connecting part 441, a bending part 442 and a second connecting part 443. The first electrode 41 can be detachably connected to the second electrode 42 through the first connecting part 441, the bending part 442 and the second connecting part 443, so as to realize the quick assembly and disassembly of the PTC heating component 4 while ensuring stability.

[0037] Specifically, the first connecting part 441 is fixedly connected to one end of the first electrode 41. The two can be integrally formed or welded together, and there is no specific limitation on this. After fixing, the first connecting part 441 can be perpendicular to the surface of the first electrode 41 near the second electrode 42.

[0038] The bent portion 442 can be fixedly connected to the first connecting portion 441 and the end of the first connecting portion 441 away from the first electrode 41. The two can also be integrally formed or welded together. When the bent portion 442 is provided on the first connecting portion 441, a bent structure will be formed at the connection between the bent portion 442 and the first connecting portion 441.

[0039] At this time, the bent portion 442 can be arranged parallel to the first electrode 41, so that when the second electrode 42 is installed on the bent portion 442, the second electrode 42 abuts against the side of the bent portion 442 near the first electrode 41, so that the second electrode 42 can be parallel to the first electrode 41.

[0040] The second connecting part 443 can be a snap-fit, which is an insulating component. It can be fixedly installed on the side of the bent part 442 near the first electrode 41 by partial injection molding, and can be detachably fixed to the end of the second electrode 42 near the first connecting part 441 by snap-fitting. To ensure the stability of the snap-fitting, the second connecting part 443 and the bent part 442 can form an annular insertion port, allowing the second electrode 42 to be inserted into the port. A protruding snap-fitting part can be provided on the inner wall of the insertion port, which can be snapped into the slot at the end of the second electrode 42. In this way, not only can the stability of the snap-fitting between the second electrode 42 and the second connecting part 443 be ensured, but the second connecting part 443 can also isolate the first electrode 41 and the second electrode 42, thus playing an insulating role.

[0041] Based on the above configuration, the first electrode 41 can be detachably connected to the second electrode 42 via the first connecting portion 441, the bending portion 442, and the second connecting portion 443. Furthermore, when the second electrode 42 is fastened to the second connecting portion 443, the second electrode 42 and the first electrode 41 can form a parallel arrangement.

[0042] It should be noted that the bending portion 442 mentioned above also includes a support portion 444 disposed on the side of the second connecting portion 443 away from the first connecting portion 441. The support portion 444 is provided with an inclined surface on the side away from the second electrode 42. The inclined surface is inclined towards the side closer to the first electrode 41 in the direction away from the first connecting portion 441, and the angle of inclination is not specifically limited.

[0043] Based on this, on the one hand, the bearing portion 444 can increase the contact area between the second connecting portion 443 and the second electrode 42, thereby improving the stability of the installation of the second electrode 42. On the other hand, when the second electrode 42 sinks on the second connecting portion 443 due to gravity, the bearing portion 444 abuts against the second electrode 42 through the tip of the inclined surface, which can increase the pressure at the contact point between the two, thereby further improving the support effect of the bearing portion 444 on the second electrode 42.

[0044] It is understood that in this embodiment, the bent portion 442 and the second electrode 42 are arranged in parallel. However, in some other embodiments, the bent portion 442 may also be arranged at an angle relative to the first electrode 41. For example, the bent portion 442 may be tilted 1-3° from the connection point with the first connecting portion 441 toward the side closer to the first electrode 41.

[0045] Thus, when the second electrode 42 comes into contact with the bent portion 442, the supporting effect of the bent portion 442 on the second electrode 42 can be improved. However, the tilt angle of the bent portion 442 should not be too large. Considering the effect of gravity, the tilt angle of the bent portion 442 should be controlled between 1-3°. The bent portion 442 can deform appropriately under pressure, thereby ensuring its supporting effect on the second electrode 42 and keeping the first electrode 41 and the second electrode 42 parallel.

[0046] Furthermore, in other embodiments, such as Figure 4 As shown, in order to further improve the stability of the assembly of the first electrode 41 and the second electrode 42, the quick-release structure 44 may also include a sleeve 445. The sleeve 445 may be made of plastic and may be located on opposite sides of the first electrode 41, and the sleeve 445 may be fitted onto the first electrode 41 and the second electrode 42.

[0047] Thus, the two ends of the second electrode 42 can be supported by the bending portion 442 and the sleeve 445 respectively, thereby ensuring the stability of the connection between the first electrode 41 and the second electrode 42. When assembling the second electrode 42 onto the first electrode 41, simply pass the second electrode 42 through the sleeve 445, so that the end of the second electrode 42 near the first connecting portion 441 overlaps the bending portion 442 and is fastened to the second connecting portion 443 to complete the assembly.

[0048] Therefore, by providing bending portions 442 and the aforementioned sleeves 445 at both ends of the first electrode 41, not only can the PTC heating element 4 be conveniently installed, but the structure of the PTC heating element 4 can also be made stable and reliable.

[0049] Please see Figure 1 and Figure 3 To facilitate power supply and control of the PTC heating element 4, a pin 45 is also fixedly provided on the first electrode 41. The pin 45 can extend from the first electrode 41 to the side where the middle shell 21 is located.

[0050] Based on this, the middle shell 21 and the shell cover 3 can be detachably connected by bolts, and a control board 6 is also provided between the middle shell 21 and the shell cover 3. The control board 6 can be a PCBA module, which can be detachably fixed to the middle shell 21 by screws, and the aforementioned pins 45 can be fixed to the corresponding terminals on the PCBA module through the middle shell 21 to achieve electrical connection.

[0051] Meanwhile, a control chamber 7 is also fixedly installed on the middle shell 21. The control chamber 7 is equipped with a high-voltage connector 71 and a low-voltage connector 72. The high-voltage connector 71 and the low-voltage connector 72 are respectively connected to the corresponding terminals on the PCBA module to realize electrical connection.

[0052] When the PTC water heating device is applied to a new energy vehicle, the high-voltage connector 71 can be electrically connected to the vehicle's high-voltage power supply system to provide power; while the low-voltage connector 72 can be electrically connected to the vehicle's low-voltage system to facilitate connection to an external control system for controlling the PTC water heating device.

[0053] It should be noted that by reasonably setting the circuit structure on the PCBA module and cooperating with the matching control module, the heating power of the PTC heating component 4 can be controlled in multiple levels.

[0054] Additionally, a temperature sensor (not shown in the figure) can be installed at position 5 of the medium flow channel, and the temperature sensor can be electrically connected to the PCBA module. In this way, in conjunction with the aforementioned PCBA module, automatic temperature regulation and over-temperature protection functions for the heat exchange medium can be achieved.

[0055] It is understandable that how to set up the corresponding circuit structure on the PCBA module, and how to cooperate with the control module to control the power of the PTC heating component 4, as well as how to adjust and control the temperature of the heat exchange medium through the temperature sensor and PCBA module, are all existing technologies in this field and are not the focus of this utility model, so they will not be elaborated here.

[0056] To better understand this utility model, the following is combined with... Figure 1-4 The technical solution of this utility model is described in detail below: During normal operation, the control board 6 can supply power to the PTC heating element 4. The multiple PTC cores 43 on the PTC heating element 4 will generate heat and exchange heat with the heat exchange medium in the medium flow channel 5, thereby heating the heat exchange medium and achieving heating.

[0057] When installing the second electrode 42, the end of the second electrode 42 closest to the first connecting part 441 can be overlapped onto the bent part 442. Then, the second electrode 42 is inserted into the socket formed by the second connecting part 443 and the bent part 442, so that the second electrode 42 and the second connecting part 443 are connected, thus completing the installation of the second electrode 42. At this time, the second connecting part 443 can isolate the first electrode 41 and the second electrode 42, thus playing an insulating role.

[0058] Therefore, with the above settings, pin 45 is not affected by injection molding, which makes it easy to control pin 45 to stay straight, helps to improve positioning accuracy, facilitates subsequent installation and use, and ensures the creepage distance between the two copper electrodes (first electrode 41 and second electrode 42) to ensure their electrical performance and safety. Moreover, since it is not necessary to wrap the ends where the first electrode 41 and the second electrode 42 are connected by integral injection molding, production costs can also be reduced.

[0059] In the description of this application, it should be noted that the terms "upper" and "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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 between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0060] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0061] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A PTC water heating device, characterized in that, include: A water chamber assembly, comprising a detachably connected first water chamber assembly and a second water chamber assembly, wherein the first water chamber assembly and / or the second water chamber assembly are provided with a medium flow channel, and a heat exchange medium is disposed in the medium flow channel; and The PTC heating element abuts against the medium flow channel and includes a first electrode, a second electrode, and a plurality of PTC cores disposed between the first electrode and the second electrode. An insulating quick-release structure is provided between the first electrode and the second electrode, and the first electrode and the second electrode are detachably connected through the quick-release structure.

2. The PTC water heating device according to claim 1, characterized in that, The quick-release structure includes: A first connecting part is fixedly connected to one end of the first electrode; A bent portion, wherein the bent portion is fixedly connected to the end of the first connecting portion away from the first electrode, and abuts against the side of the second electrode opposite to the first electrode; and The second connecting part is fixedly disposed on the bent part and detachably connected to one end of the second electrode.

3. The PTC water heating device according to claim 2, characterized in that, The bent portion is arranged parallel to the first electrode; or The bent portion is inclined at 1-3° from its connection with the first connecting portion toward the side closer to the first electrode.

4. The PTC water heating device according to claim 2, characterized in that, The bending portion has a supporting portion on the side of the second connecting portion away from the first connecting portion, and the supporting portion has an inclined surface on the side away from the second electrode. The inclined surface is inclined towards the side closer to the first electrode in the direction away from the first connecting portion.

5. The PTC water heating device according to claim 2, characterized in that, The second connecting part is a snap fastener, and the second connecting part is fastened to the second electrode.

6. The PTC water heating device according to claim 2, characterized in that, The quick-release structure also includes: A socket is provided, wherein the socket and the first connecting portion are located on opposite sides of the first electrode, and the socket is sleeved on the first electrode and the second electrode.

7. The PTC water heating device according to claim 1, characterized in that, Also includes: A control panel, which is fixedly mounted on the outside of the water chamber assembly; as well as The pin is fixedly mounted on the first electrode and is fixedly connected to the control board.

8. The PTC water heating device according to claim 1, characterized in that, The medium flow channel has a continuous curved structure and is evenly distributed on one side of the first water chamber assembly and / or the second water chamber assembly.

9. The PTC water heating device according to claim 1, characterized in that, The medium flow channel includes: A first medium flow channel is disposed on the first water chamber assembly and abuts against one side of the PTC heating element; and The second medium flow channel is disposed on the second water chamber assembly and abuts against the side of the PTC heating element away from the first medium flow channel; When the first water chamber assembly is connected to the second water chamber assembly, the first medium flow channel is connected to the second medium flow channel.

10. The PTC water heating device according to any one of claims 1-9, characterized in that, A sealing groove is provided between the first water chamber assembly and the second water chamber assembly, and a sealing element is provided in the sealing groove.

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