Electrolysis device
By setting a detachable connection and mating part on the electrolytic device, the problems of reducing the concentration of electrolytic products and cleaning and maintenance of electrolytic cells are solved, and the activity maintenance of electrolytic products and the convenient maintenance of electrolytic units are achieved, thereby improving the use efficiency.
Patent Information
- Application Number
- CN202421989926.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-08-16
AI Technical Summary
During the use of existing electrolytic devices, the concentration of electrolytic products decreases during the transmission process, and the electrolytic tank is difficult to clean and repair, which affects the use effect.
An electrolytic device is designed, by providing a detachable connection and mating part on the electrolytic unit, the external parts can be detachably connected to the electrolytic unit, so as to realize convenient cleaning and maintenance of the electrolytic unit, and to improve the activity of the electrolytic product through the diverting structure.
It realizes the reduction of the loss of the active ingredients of the electrolytic product during the transmission process, and the convenient cleaning and maintenance of the electrolytic unit is improved, thus improving the use efficiency and electrolytic effect.
Smart Images

Figure CN223118217U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of electrolyzed water, and particularly relates to an electrolysis device. Background Art
[0002] At present, the common electrolysis equipment on the market has the electrolytic cell installed in a container and connected to a water tank for convenient electrolysis work; the spray port is connected to the container interface. This structure of the electrolysis device often has a long pipeline. One drawback is that the electrolyzed products need to pass through the part of the container opening and then be supplied to the spray port for spraying and use, which will undoubtedly affect the concentration of electrolyzed products. Some active ions may be reduced or oxidized and lose their efficacy during this process.
[0003] In addition, scaling is inevitable during the use of the electrolytic cell. Sometimes, cleaning, maintenance, or replacement of the diaphragm is required, and at this time, the user will not be able to continue using it. Summary of the Invention
[0004] In order to solve the above problems, this application provides an electrolysis device that is convenient for cleaning and maintenance.
[0005] This application proposes an electrolysis device, including:
[0006] An electrolysis unit, the electrolysis unit includes a first container, a receiving cavity is provided in the first container, an electrolysis component is provided in the receiving cavity, at least one first through hole communicating with the receiving cavity, and a first connection part are provided on the first container;
[0007] A first external part, which is provided with a first mating part detachably connected to the first connection part, and a first connection pipe corresponding to the first through hole;
[0008] When the first mating part is connected to the first connection part, the first connection pipe communicates with the receiving cavity through the first through hole.
[0009] As a further optimization of the present utility model, it further includes a second external part. A second connection part and at least one second through hole communicating with the receiving cavity are further provided on the first container.
[0010] The second external part is provided with a second mating part detachably connected to the second connection part, and a second connection pipe corresponding to the second through hole;
[0011] When the second mating part is connected to the second connection part, the second connection pipe communicates with the receiving cavity through the second through hole.
[0012] As a further optimization of the present utility model, the first connecting portion is a first snap or a first clamping groove provided on one side of the first through hole, and the first mating portion is a first mating clamping groove or a first mating snap for mating with the first connecting portion;
[0013] and / or,
[0014] The second connecting portion is a second snap or a second clamping groove provided on one side of the second through hole, and the second mating portion is a second mating clamping groove or a second mating snap.
[0015] As a further optimization of the present utility model, the first connecting portion is a first thread provided on one side of the first through hole, and the first mating portion is a first mating thread;
[0016] and / or,
[0017] The second connecting portion is a first thread provided on one side of the second through hole, and the second mating portion is a second mating thread.
[0018] As a further optimization of the present utility model, the first connecting portion is a first magnet or a first ferromagnetic member provided on one side of the first through hole;
[0019] and / or,
[0020] The second connecting portion is a second magnet or a second ferromagnetic member provided on one side of the second through hole.
[0021] As a further optimization of the present utility model, the first connecting portion is a first protrusion or a first groove provided on one side of the first through hole, the first mating portion is a first mating groove or a first mating protrusion corresponding to the first connecting portion, and the first connecting portion and the first mating portion are in interference fit;
[0022] and / or,
[0023] The second connecting portion is a second protrusion or a second groove provided on one side of the second through hole, the second mating portion is a second mating groove or a second mating protrusion corresponding to the second connecting portion, and the second connecting portion and the second mating portion are in interference fit.
[0024] As a further optimization of the present utility model, the first connecting portion is a first flange provided on one side of the first through hole, and the first mating portion is a first mating flange;
[0025] and / or,
[0026] The second connecting portion is a second flange provided on one side of the second through hole, and the second mating portion is a second mating flange.
[0027] As a further optimization of the present utility model, the electrolysis assembly includes a first electrode and a second electrode which are oppositely arranged. The first container includes a first end portion on the side of the first electrode away from the second electrode, and a second end portion on the side of the second electrode away from the first electrode. The first through hole and the second through hole are respectively located on the first end portion and the second end portion.
[0028] As a further optimization of the present utility model, the inner diameter of the first through hole is less than or equal to the inner diameter of the first connection portion;
[0029] and / or
[0030] the inner diameter of the second through hole is less than or equal to the inner diameter of the second connection portion.
[0031] As a further optimization of the present utility model, the first container includes a first end portion and a second end portion which are oppositely arranged. The electrolysis assembly extends from one end close to the first end portion to the direction close to the second end portion. Two first through holes are provided on the first end portion, and the two first through holes are respectively arranged on both sides of the electrolysis assembly.
[0032] As a further optimization of the present utility model, the first through hole is a water outlet hole, the first external member further includes a water spraying port communicated with the first connecting pipe, the second through hole is a water inlet hole, and the second external member further includes a water inlet port communicated with the second connecting pipe.
[0033] For the electrolysis device provided by the present application, a first connection portion is provided on the electrolysis unit, and a first matching portion capable of being detachably connected with the first connection portion is provided on the first external member, so that the first external member can be detachably connected with the electrolysis unit. When the electrolysis unit needs to be repaired or cleaned, the user can continue to use it by replacing it with a spare electrolysis unit, or can use the first external member alone, and the user can also select different external components according to needs. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] The drawings here are incorporated into the description and form a part of this description, showing embodiments consistent with the present application, and are used together with the description to explain the principles of the present application.
[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.
[0036] Figure 1 It is a schematic structural diagram of the first embodiment of the present application;
[0037] Figure 2 It is an exploded view of the structure of the electrolysis unit according to the first embodiment of the present application;
[0038] Figure 3 It is a schematic structural diagram of the second embodiment of the present application;
[0039] Figure 4 It is a schematic structural diagram of the third embodiment of the present application;
[0040] Figure 5 It is a schematic structural diagram of the fourth embodiment of the present application;
[0041] Figure 6 It is a schematic structural diagram of the fifth embodiment of the present application;
[0042] Figure 7 It is a schematic structural diagram of the sixth embodiment of the present application;
[0043] Figure 8 It is a schematic structural diagram of the seventh embodiment of the present application.
[0044] Explanation of reference numerals:
[0045] 1. Electrolysis unit; 11. First container; 111. First end; 112. Second end; 12. Electrolysis component; 121. First electrode; 122. Second electrode; 123. Diaphragm; 124. First solder joint; 125. Second solder joint; 13. First through hole; 14. First connection part; 15. Second connection part; 16. Second through hole; 17. Power supply contact; 18. Sealing ring; 2. First external part; 21. First matching part; 22. First connecting pipe; 23. Sealing ring groove; 3. Second external part; 31. Second matching part; 32. Second connecting pipe; 33. External part. Detailed implementation manners
[0046] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
[0047] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.
[0048] As Figure 1-8 shown, the present utility model provides an electrolysis device, comprising:
[0049] An electrolysis unit 1, the electrolysis unit 1 includes a first container 11, a receiving cavity is provided in the first container 11, an electrolysis assembly 12 is provided in the receiving cavity, at least one first through hole 13 communicating with the receiving cavity is provided on the first container 11, and a first connecting portion 14;
[0050] A first external member 2, provided with a first mating portion 21 detachably connected to the first connecting portion 14, and a first connecting pipe 22 corresponding to the first through hole 13;
[0051] When the first mating portion 21 is connected to the first connecting portion 14, the first connecting pipe 22 communicates with the receiving cavity through the first through hole 13.
[0052] In the electrolysis device described in this embodiment, a first connecting portion 14 is provided on the electrolysis unit 1, and a first mating portion 21 capable of being detachably connected to the first connecting portion 14 is provided on the first external member 2, so that the first external member 2 can be detachably connected to the electrolysis unit 1. When the electrolysis unit 1 needs to be repaired or cleaned, the user can continue to use it by replacing the standby electrolysis unit 1, or the first external member 2 can be used alone, and the user can also select different external components according to needs.
[0053] Referring Figure 8 to, in another embodiment of the present utility model, the electrolysis device further includes a second external member 3, a second connecting portion 15 is further provided on the first container 11, and a second through hole 16 communicating with the receiving cavity,
[0054] The second external member 3 is provided with a second mating portion 31 detachably connected to the second connecting portion 15, and a second connecting pipe 32 corresponding to the second through hole 16;
[0055] When the second mating part 31 is connected to the second connecting part 15, the second connecting pipe 32 communicates with the accommodating cavity through the second through hole 16.
[0056] In this embodiment, both the first external member 2 and the second external member 3 can be water spraying members, or both can be water inlet members, or one can be a water spraying member and the other can be a water inlet member. The water spraying member can be a fitting with a spraying function or a water spraying function, or a fitting that cooperates with other functions, such as a fitting that can be externally connected to a dental flushing nozzle, a facial cleansing nozzle, etc. The water inlet member can be a fitting adapted to a water storage container such as a faucet, a mineral water bottle, or a special water bottle.
[0057] In the electrolysis device described in this embodiment, by adding the second connecting part 15 and the second through hole 16, and providing a second mating part 31 on the second connecting part 3 that can be detachably connected to the second connecting part 15, the second external member 3 can be detachably connected to the electrolysis unit 1. When the electrolysis unit 1 needs to be repaired or cleaned, the user can continue to use it by replacing it with a spare electrolysis unit 1, or can use the second external member 3 alone, and the user can also select different external components according to needs.
[0058] Reference Figure 1-2 , different from the above embodiment, in this embodiment, the first connecting part 14 is a first buckle provided on one side of the first through hole 13, and the first mating part 21 is a first mating slot that cooperates with the first connecting part 14.
[0059] In this embodiment, one of the second connecting part 15 and the second mating part 31 is a buckle and the other is a slot.
[0060] In this embodiment, both the first connecting part 14 and the second connecting part 15 include a protruding structure, and the buckles are all provided on this protruding structure, which is more convenient for the user to assemble and disassemble.
[0061] In this embodiment, the first connecting part 14 and the first mating part 21 are clamped by rotation, that is, the first mating part 21 further includes a chute extending along the circumferential direction of the first external member 1. When the first external member 2 rotates relative to the electrolysis unit 1, the buckle will slide along the chute into the slot, thereby completing the connection.
[0062] In another embodiment of the present application, the first connecting part 14 is a first slot, and the first mating part 21 is a first buckle that cooperates with it.
[0063] In the above embodiment, both the first buckle and the first slot can be selected from the buckle structures in the prior art.
[0064] Reference Figure 3, in another embodiment of the present application, the diameter of the first through hole 13 is larger than the diameter of the first connecting pipe 22, and the diameter of the first through hole 13 can be only slightly smaller than the diameter of the first container 11.
[0065] Specifically, the first through hole 13 is arranged inside the first connecting portion 14, that is, the inner diameter of the first through hole 13 is smaller than the inner diameter of the first connecting portion 14. When only one first through hole 13 is provided, the size of the first through hole 13 can be equal to the inner diameter of the first connecting portion 14.
[0066] In this embodiment, the diameter of the second through hole 16 in the present application is larger than the diameter of the second connecting pipe 32, and the diameter of the second through hole 16 can be only slightly smaller than the diameter of the first container 11.
[0067] In this embodiment, the second through hole 16 is arranged inside the second connecting portion 15, that is, the inner diameter of the first through hole 13 is smaller than the inner diameter of the first connecting portion 14. When only one second through hole 16 is provided, the size of the second through hole 16 can be equal to the inner diameter of the second connecting portion 15.
[0068] Reference Figure 4 , in another embodiment of the present application, the electrolysis assembly 12 extends along the axial direction of the electrolysis unit 1. The first container 11 includes a first end portion 111 and a second end portion 112 which are oppositely arranged. The electrolysis assembly 1 extends from one end close to the first end portion 111 to the direction close to the second end portion 112. Two first through holes 13 are provided on the first end portion 111, and the two first through holes 13 are respectively arranged on both sides of the electrolysis assembly 12. The first through holes 13 are two, and the two first through holes 13 are respectively arranged on both sides of the electrolysis assembly. The first connecting pipes 22 are also two, and the two first connecting pipes 22 are also respectively arranged on both sides of the electrolysis assembly 12. The above arrangement can effectively achieve the effect of shunting, and can also shunt the products electrolyzed by the first electrode 121 and the second electrode 122. Multiple water outlets can be provided on the first external member 2, or multiple external devices with different functions can be externally connected again.
[0069] In this embodiment, the electrolysis device is further provided with two second through holes 16, and the two second through holes 16 are arranged on both sides of the electrolysis assembly 12, so as to further achieve the effect of shunting.
[0070] It should be noted that the present application does not limit the number of the first through holes 13 or the second through holes 16, and multiple or one can be set according to needs.
[0071] Reference Figure 5, in another embodiment of the present application, the first connecting portion 14 is a plurality of buckles with inclined surfaces evenly distributed on the above-mentioned convex structure, and the inclined surfaces extend in a direction away from the convex structure and away from the first mating portion 21. The first mating portion 21 is a corresponding groove for mating therewith, so that assembly can be completed quickly and the installation structure can be ensured.
[0072] In this embodiment, the second connecting portion 15 and the second mating portion 31 are respectively of the same structure as the first connecting portion 14 and the first mating portion 21.
[0073] In another embodiment of the present application, the first connecting portion 14 is a plurality of grooves evenly distributed on the above-mentioned convex structure, and the first mating portion 21 is a plurality of buckles with inclined surfaces evenly distributed.
[0074] In another embodiment of the present application, the first connecting portion 14 is a first thread provided on one side of the first through hole 13, the first mating portion 21 is a first mating thread, and one of the first thread and the first mating thread is an external thread and the other is an internal thread for mating therewith.
[0075] In this embodiment, one of the second connecting portion 15 and the second mating portion 31 is an external thread and the other is an internal thread for mating therewith.
[0076] In this embodiment, both the first connecting portion 14 and the second connecting portion 15 include a convex structure, and the threads are both provided on the convex structure, which is more convenient for users to assemble and disassemble.
[0077] Reference Figure 6 , in another embodiment of the present application, the first connecting portion 14 is a first protrusion provided on one side of the first through hole 13, the first mating portion 21 is a first mating groove corresponding to the first connecting portion 14, and the first connecting portion 14 and the first mating portion 21 are in interference fit. The above structure enables the first connecting portion 14 and the first mating portion 21 to complete relevant installation and disassembly by direct plugging and unplugging.
[0078] In this embodiment, a sealing ring 18 is provided on the first protrusion and distributed circumferentially along the first protrusion. A sealing ring groove 23 corresponding to the sealing ring 18 is provided on the groove wall of the first mating groove. When the first protrusion is inserted into a set position in the first mating groove, the sealing ring 18 is embedded in the sealing ring groove 23, so as to ensure that there is no water leakage when installing external parts.
[0079] In this embodiment, the second connecting portion 15 and the second mating portion 31 are respectively of the same structure as the first connecting portion 16 and the second mating portion 31. A corresponding sealing ring may be provided on the second connecting portion 15, and a corresponding sealing ring groove may be provided on the second mating portion 31.
[0080] Reference Figure 7 , in another embodiment of the present application, the first connecting portion 14 is a first magnet provided on one side of the first through hole 13, the first mating portion 21 is a first mating magnet, and the first magnet and the first mating magnet attract each other, so that the first connecting portion 14 and the first mating portion 21 can be connected.
[0081] In this embodiment, the first magnet is disposed around the first through hole 13, so as to ensure accurate docking of the first connecting pipe 22 and the first through hole 13 during installation. The first magnet can be a complete ring magnet or multiple strip or arc-shaped magnets.
[0082] In this embodiment, the second connecting portion 15 and the second mating portion 31 are also mutually cooperating magnets.
[0083] In another embodiment, the first connecting portion 14 is a first ferromagnetic member, and the first mating portion 21 is a corresponding mating ferromagnetic member.
[0084] In another embodiment, the first connecting portion 14 is a groove, and the first mating portion 21 is a protrusion.
[0085] In this embodiment, one of the second connecting portion 15 and the second mating portion 31 is a groove, and the other is a protrusion, and the two are in interference fit.
[0086] Reference Figure 8 , the second connecting portion 15 is a second flange provided on one side of the second through hole 16, the second mating portion 31 is a second mating flange, and the two are connected to each other through the above structure.
[0087] In this embodiment, the first connecting portion 14 is a first flange provided on one side of the first through hole 13, and the first mating portion 21 is a first mating flange.
[0088] In this embodiment, a further external member 33 is provided below the second external member 3 for connection to other containers or water supply structures. In this embodiment, the second external member 3 is also of flange structure.
[0089] Reference Figure 1-8, in the above embodiments, the electrolysis assembly 12 includes a first electrode 121 and a second electrode 122 which are oppositely arranged. The first container 11 includes a first end portion 111 on the side of the first electrode 121 away from the second electrode 122, and a second end portion 112 on the side of the second electrode 122 away from the first electrode 121. The first through hole 13 and the second through hole 16 are respectively located on the first end portion 111 and the second end portion 112.
[0090] The above arrangement can effectively achieve the miniaturized design of the electrolysis assembly 12, which is beneficial to the user's use, cleaning, replacement and carrying. Moreover, for the electrolysis assembly 12 with such a structure, when the first external component 2 is a water outlet component and the second external component 3 is a water inlet component, the path between it and the first connecting component 2 or the second connecting component 3 is short, and the electrolyzed water can be ejected quickly, effectively reducing the decomposition and reduction of the concentration of electrolysis products during transmission, improving the active ingredients of the electrolysis products in the ejected water, and reducing power consumption.
[0091] In the above embodiments, the first through hole 13 and the second through hole 16 can both be water inlet holes, or only water outlet holes, or one can be a water outlet hole and the other can be a water inlet hole, which can be set according to needs.
[0092] In the above embodiments, one of the first electrode 121 and the second electrode 122 is an anode and the other is a cathode. Preferably, the anode is arranged on the side close to the water outlet hole, and the cathode is arranged on the side close to the water inlet hole.
[0093] In another embodiment, the electrolysis assembly 12 does not have a diaphragm.
[0094] In the above embodiments, after the water in the accommodation cavity is cut off, a certain amount of water will be stored in the accommodation cavity to ensure that the electrolysis unit will not dry burn when starting.
[0095] In the above embodiments, the first electrode 121 and the second electrode 122 can be made of a variety of materials, including metals, semiconductors and other compounds, such as metal electrodes: copper, aluminum, nickel, zinc, etc., or can also be semiconductor electrodes or other compound electrodes. Different types of electrode materials can be selected to meet different electrochemical reactions. In this embodiment, a conductive diamond film electrode is preferably used.
[0096] In the above embodiments, the first electrode 121 and the second electrode 122 are both connected by soldering, such as Figure 1-8 the first solder joint 124 and the second solder joint 125 shown. The electrolysis unit 1 can be powered by an external contact power supply, or a corresponding battery can be assembled on the electrolysis unit 1. In this embodiment, an externally assembled battery is preferably used, and the electrolysis unit 1 is powered through the power contact 17 in the figure.
[0097] In the above embodiments, the external component may also be the electrolysis unit 1 described in the present application, that is, multiple electrolysis units 1 can be used in series.
[0098] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.
Claims
1. An electrolysis device, characterized in that, Comprising: An electrolysis unit, the electrolysis unit includes a first container, a receiving cavity is provided in the first container, an electrolysis assembly is provided in the receiving cavity, at least one first through hole communicating with the receiving cavity is provided on the first container, and a first connection part; A first external part, provided with a first mating part detachably connected to the first connection part, and a first connecting pipe corresponding to the first through hole; When the first mating part is connected to the first connection part, the first connecting pipe communicates with the receiving cavity through the first through hole.
2. The electrolysis device according to claim 1, characterized in that, It further includes a second external part, a second connection part is further provided on the first container, and at least one second through hole communicating with the receiving cavity, The second external part is provided with a second mating part detachably connected to the second connection part, and a second connecting pipe corresponding to the second through hole; When the second mating part is connected to the second connection part, the second connecting pipe communicates with the receiving cavity through the second through hole.
3. The electrolysis device according to claim 2, characterized in that, The first connection part is a first buckle or a first clamping groove provided on one side of the first through hole, and the first mating part is a first mating clamping groove or a first mating buckle matching with the first connection part; And / or, The second connection part is a second buckle or a second clamping groove provided on one side of the second through hole, and the second mating part is a second mating clamping groove or a second mating buckle.
4. The electrolysis device according to claim 2, characterized in that The first connection part is a first thread provided on one side of the first through hole, and the first mating part is a first mating thread; And / or, The second connection part is a first thread provided on one side of the second through hole, and the second mating part is a second mating thread.
5. The electrolysis device according to claim 2, characterized in that, The first connection part is a first magnet or a first ferromagnetic part provided on one side of the first through hole; And / or, The second connection part is a second magnet or a second ferromagnetic part provided on one side of the second through hole.
6. The electrolysis device according to claim 2, characterized in that, The first connection part is a first protrusion or a first groove provided on one side of the first through hole, the first mating part is a first mating groove or a first mating protrusion corresponding to the first connection part, and the first connection part and the first mating part are in interference fit; And / or, The second connection part is a second protrusion or a second groove provided on one side of the second through hole, the second mating part is a second mating groove or a second mating protrusion corresponding to the second connection part, and the second connection part and the second mating part are in interference fit.
7. The electrolysis device according to claim 2, characterized in that, The first connection part is a first flange provided on one side of the first through hole, and the first mating part is a first mating flange; And / or, The second connection part is a second flange provided on one side of the second through hole, and the second mating part is a second mating flange.
8. The electrolysis device according to any one of claims 2-7, characterized in that The electrolysis assembly includes a first electrode and a second electrode arranged oppositely, the first container includes a first end portion on the side where the first electrode is away from the second electrode, and a second end portion on the side where the second electrode is away from the first electrode, and the first through hole and the second through hole are respectively located on the first end portion and the second end portion.
9. The electrolysis device according to any one of claims 2-7, characterized in that, The inner diameter of the first through hole is less than or equal to the inner diameter of the first connection part; And / or, The inner diameter of the second through hole is less than or equal to the inner diameter of the second connection part.
10. The electrolysis device according to any one of claims 2-7, characterized in that, The first container includes a first end portion and a second end portion which are oppositely arranged. The electrolysis assembly extends from one end close to the first end portion towards the direction close to the second end portion. Two first through holes are provided on the first end portion, and the two first through holes are respectively arranged on two sides of the electrolysis assembly.
11. The electrolysis device according to any one of claims 2-7, characterized in that, The first through hole is a water outlet hole. The first external member further includes a water spraying port communicated with the first connecting pipe. The second through hole is a water inlet hole. The second external member further includes a water inlet port communicated with the second connecting pipe.