Capacitive sensor and tea bar machine

Abstract

The utility model discloses a capacitive sensor and a tea bar machine, and the capacitive sensor comprises a housing, a detection assembly, and a water passing pipe. The detection assembly is arranged in the shell and comprises a detection plate and a detection coil, the detection coil is connected with the detection plate, and a through hole is formed in the detection coil; the water passing pipe penetrates through the shell and is located in the through hole, and the water passing pipe is made of hard plastic. According to the capacitive sensor provided by the utility model, the installation efficiency of the capacitive sensor can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drinking water equipment, in particular to a capacitive sensor and a tea bar machine. Background Art

[0002] At present, some tea bar machines are equipped with capacitive sensors for detecting whether the water flow in the water pipe is in a water vapor mixed state. The capacitive sensor is usually installed by passing the soft water pipe through its hard shell, and then using the detection component in the shell to detect whether the water flow flowing through the soft water pipe is in a water vapor mixed state. However, the installation method of installing the capacitive sensor in the tea bar machine requires manual operation and installation, because after the soft water pipe passes through the hard shell, it is also necessary to ensure the sealing of the capacitive sensor, and the installation process is complicated and inefficient. Utility Model Content

[0003] The main purpose of the utility model is to provide a capacitive sensor, aiming to improve the installation efficiency of the capacitive sensor.

[0004] To achieve the above-mentioned purpose, the utility model proposes a capacitive sensor, which includes a shell, a detection component and a water pipe; the detection component is arranged in the shell, the detection component includes a detection board and a detection coil, the detection coil is connected to the detection board, and the detection coil is formed with a through hole; the water pipe passes through the shell and is located in the through hole, and the material of the water pipe is configured as hard plastic.

[0005] In one embodiment, one side of the shell is provided with a first tube hole for the water pipe to pass through, and the other side is provided with a second tube hole for the water pipe to pass through. The water pipe passes through the first tube hole, the through hole and the second tube hole in sequence, and is sealed with the first tube hole and the second tube hole.

[0006] In one embodiment, a limiting rib is disposed on the outer wall of the water pipe, and the limiting rib is located between the shell and the detection coil, and the detection coil presses the limiting rib against the shell.

[0007] In one embodiment, a resistance portion is provided on the inner wall surface of the shell corresponding to the outer periphery of the first tube hole, the limiting rib is located between the limiting rib and the detection coil, and the detection coil presses the limiting rib against the resistance portion.

[0008] In one embodiment, a limiting convex rib is disposed on the outer wall of the water pipe, and a limiting hook is disposed on the outer wall surface of the shell corresponding to the periphery of the first tube hole, and the limiting hook cooperates with the limiting convex rib in a limiting manner.

[0009] In one embodiment, the hard plastic is any one of PP, PCTG, HIPS or ABC.

[0010] In one embodiment, the wall thickness of the water pipe is in the range of 1 mm to 2 mm, and / or the outer diameter of the water pipe is in the range of 6 mm to 8 mm.

[0011] In one embodiment, the housing comprises a bottom shell and an end cover, and the bottom shell and the end cover are snap-connected.

[0012] In one embodiment, the end cover is provided with a sink groove corresponding to the bottom shell, and when the bottom shell and the end cover are snapped together, the end of the bottom shell extends into the sink groove, or the end surface of the bottom shell abuts against the bottom of the sink groove.

[0013] In one embodiment, a limiting sliding groove is provided in the shell, and the detection plate is arranged in the limiting sliding groove.

[0014] In one embodiment, the detection coil is configured in the shape of a spiral spring.

[0015] In one embodiment, the capacitive sensor further comprises a sealing member, a mounting opening is formed on a side of the housing away from the first tube hole, the sealing member is sealingly disposed in the mounting opening, and the second tube hole is formed in the sealing member.

[0016] In one embodiment, the water pipe and the first pipe hole and the second pipe hole are interference fit.

[0017] In one embodiment, a clamping groove is formed on the peripheral side of the sealing member, and the sealing member is clamped in the installation opening.

[0018] The utility model also proposes a tea bar machine, the tea bar machine includes the capacitive sensor. The capacitive sensor includes a housing, a detection component and a water pipe; the detection component is arranged in the housing, the detection component includes a detection board and a detection coil, the detection coil is connected to the detection board, and the detection coil is formed with a through hole; the water pipe passes through the housing and is located in the through hole, and the material of the water pipe is hard plastic.

[0019] The technical solution of the utility model configures the material of the water pipe of the capacitive sensor to be hard plastic, so that when the water pipe is installed, the hard water pipe can be passed through the first pipe hole, the through hole and the second pipe hole in sequence by automated mechanical equipment, without the need for manual installation, thereby simplifying the assembly method of the water pipe, improving the installation efficiency of the water pipe, and further improving the installation efficiency of the capacitive sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 This is a schematic structural diagram of an embodiment of a capacitive sensor of the utility model;

[0022] Figure 2 for Figure 1 A cross-sectional view of a capacitance sensor;

[0023] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0024] Figure 4 for Figure 1 Exploded diagram of the capacitive sensor;

[0025] Figure 5 for Figure 4 A schematic diagram of the structure of the housing and seal of the capacitance sensor;

[0026] Figure 6 for Figure 5 A schematic diagram of the structure from another perspective.

[0027] Description of Figure Numbers:

[0028]

[0029]

[0030] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0034] The utility model provides an embodiment of a capacitive sensor, which is mainly used in drinking water equipment to detect whether there is gas in the liquid in the water pipe of the drinking water equipment. The drinking water equipment is a tea bar machine, a water purifier or a water dispenser.

[0035] See also Figure 1 , Figure 4 and Figure 6 In one embodiment of the utility model, the capacitive sensor 10 includes a shell 100, a detection component 200, a sealing member 300 and a water pipe 400; a mounting port 121 is provided on one opposite side of the shell 100, and a first tube hole 111 is provided on the other side; the detection component 200 is arranged in the shell 100, and the detection component 200 includes a detection board 210 and a detection coil 220, the detection coil 220 is connected to the detection board 210, and the detection coil 220 is formed with a through hole 221; the sealing member 300 is sealed in the mounting port 121, and the sealing member 300 is formed with a second tube hole 310; the water pipe 400 is penetrated with the first tube hole 111, the through hole 221 and the second tube hole 310 in sequence, and is sealed with the first tube hole 111 and the second tube hole 310, and the material of the water pipe 400 is configured as hard plastic.

[0036] Specifically, the housing 100 of the capacitive sensor 10 is roughly rectangular, the water pipe 400 can pass through the housing 100 from two opposite sides in the length direction, and the detection component 200 is arranged in the housing 100 to detect the state of the water flowing through the water pipe 400. The material of the housing 100 is a hard material, and the type of the hard material can be ABS, HIPS, PP, PC and other hard materials, or metal or alloy materials, etc. In this embodiment, the material of the housing 100 is ABS material.

[0037] See also Figure 2 and Figure 4 The detection assembly 200 includes a detection plate 210 and a detection coil 220. The detection coil 220 is connected to the detection plate 210, and the detection coil 220 is formed with a through hole 221 for the water pipe 400 to pass through. The shape of the detection coil 220 is roughly designed in the shape of a spiral spring, so that the water pipe 400 can pass through it, and two pins are led out at both ends of the length direction of the detection coil 220 and connected to the detection plate 210. The detection coil 220 is formed with a through hole 221 for the water pipe 400 to pass through, which can be understood as the detection coil 220 is sleeved on the outer wall of the water pipe 400 to more efficiently and comprehensively detect the state of the water flowing through the water pipe 400. The material of the detection coil 220 is preferably 304 stainless steel.

[0038] More specifically, since the water pipe 400 needs to pass through the opposite sides of the housing 100 to be detected by the detection assembly 200 located in the housing 100, the opposite sides of the housing 100 are respectively provided with an installation port 121 and a first tube hole 111, and the first tube hole 111 is used for the water pipe 400 to pass through. In order to ensure the sealing between the first tube hole 111 and the water pipe 400 after installation, the first tube hole 111 and the water pipe 400 are configured as an interference fit. Similarly, since the detection board 210 is installed in the housing 100, and the detection board 210 is electrically connected to the control module of the tea bar machine, in order to prevent the water or water vapor in the housing 100 from damaging the detection board 210, a sealing member 300 is also provided at the installation port 121 to seal the installation port 121, and the sealing member 300 and the installation port 121 can be configured as an interference fit to further improve the sealing of the housing 100. The material of the sealing member 300 is silicone or rubber. The sealing member 300 is provided with a second pipe hole 310 for the water pipe 400 to pass through, so as to facilitate the water pipe 400 to pass through from opposite sides of the housing 100 .

[0039] When the water pipe 400 is installed in the shell 100, since the material of the water pipe 400 is hard plastic and the material of the shell 100 is configured as a hard material, the hard water pipe 400 can be passed through the first tube hole 111, the through hole 221 and the second tube hole 310 in sequence by automated equipment, and no manual installation is required, which simplifies the assembly method of the water pipe 400, improves the installation efficiency of the water pipe 400, and thereby improves the installation efficiency of the capacitive sensor 10.

[0040] It should be noted that when the capacitive sensor 10 is applied to a tea bar machine, both ends of the hard water pipe 400 can be respectively connected to the water hose in the tea bar machine to achieve connectivity of the entire water system of the tea bar machine.

[0041] See also Figure 2 and Figure 4 It is worth mentioning that, in order to ensure the detection accuracy and rapid response of the detection component 200, the number of the detection coils 220 is set to at least two, at least two detection coils 220 are arranged on the detection board 210 at intervals, and the through holes 221 of at least two detection coils 220 are coaxial. The number of the detection coils 220 can be 2, 3, or 4, for example. Considering the overall volume of the capacitive sensor 10, as well as the detection performance, response time, etc., the number of the detection coils 220 is preferably set to two, and the two detection coils 220 are arranged side by side on the detection board 210 and connected to the detection board 210.

[0042] The technical solution of the present utility model configures the material of the water pipe 400 of the capacitive sensor 10 as hard plastic, so that when the water pipe 400 is installed, the hard water pipe 400 can be passed through the first pipe hole 111, the through hole 221 and the second pipe hole 310 in sequence by automated mechanical equipment, without the need for manual installation, thereby simplifying the assembly method of the water pipe 400, improving the installation efficiency of the water pipe 400, and further improving the installation efficiency of the capacitive sensor 10.

[0043] In one embodiment, the water pipe 400 is interference fit with the first tube hole 111 and the second tube hole 310. Such a configuration can ensure the sealing between the water pipe 400 and the first tube hole 111 and the second tube hole 310, and prevent water vapor or water mist from entering the housing 100 through the gap between the first tube hole 111 and the second tube hole 310, thereby causing the detection board 210 installed in the housing 100 to be damaged by moisture or water ingress and unable to work, thereby further improving the service life of the capacitive sensor 10.

[0044] See also Figure 3 and Figure 4In one embodiment, the outer wall of the water pipe 400 is provided with a limiting convex rib 410, and the limiting convex rib 410 is located between the housing 100 and the detection coil 220. Specifically, the outer wall of the water pipe 400 can also be provided with a limiting convex rib 410, and the limiting convex rib 410 and the water pipe 400 are integrally formed, which is convenient for production and can further enhance the stability of the connection between the limiting convex rib 410 and the water pipe 400. The limiting convex rib 410 is located between the housing 100 and the detection coil 220. It can be understood that the detection coil 220 is arranged in the shape of a spiral spring, which has a certain elasticity. The limiting convex rib 410 can be pressed against the inner wall surface of the housing 100 through the detection coil 220 to prevent the position of the water pipe 400 from being displaced after being installed in the housing 100, thereby affecting the connection between the water pipe 400 and the external water hose.

[0045] Furthermore, a resisting portion 112 is provided on the outer periphery of the inner wall surface of the shell 100 corresponding to the first tube hole 111, and the limiting convex rib 410 is located between the resisting portion 112 and the detection coil 220. Specifically, a resisting portion 112 can also be provided on the outer periphery of the inner wall surface of the shell 100 corresponding to the first tube hole 111, and the resisting portion 112 is formed by protruding outward from the outer periphery of the inner wall surface of the shell 100 corresponding to the first tube hole 111, and the detection coil 220 can press the limiting convex rib 410 on the resisting portion 112. The design of the resisting portion 112 reduces the space in the length direction of the shell 100, and the pressing effect is better, which can further ensure that the position of the water pipe 400 will not change after being installed in the shell 100.

[0046] See also Figure 6 In another embodiment, the outer wall of the water pipe 400 is provided with a limiting convex rib 410, and the outer wall surface of the shell 100 is provided with a limiting hook 113 corresponding to the outer periphery of the first tube hole 111, and the limiting hook 113 cooperates with the limiting convex rib 410. Different from the previous embodiment, the limiting convex rib 410 in this embodiment is located outside the shell 100, and the limiting hook 113 is provided on the outer wall surface of the shell 100 corresponding to the outer periphery of the first tube hole 111, and the limiting convex rib 410 is clamped by the limiting hook 113 to achieve the stability of the water pipe 400 after installation, and to ensure that the position of the water pipe 400 will not change.

[0047] In one embodiment, the hard plastic is any one of PP, PCTG, HIPS or ABC. Specifically, the material of the hard plastic can be any one of PP, PCTG, HIPS or ABC. In this embodiment, the hard plastic is made of PP material, and polypropylene (Polypropylene, referred to as PP) is a semi-crystalline thermoplastic. It has high impact resistance, strong mechanical properties, and resistance to corrosion by various organic solvents and acids and alkalis. PP material has a high dielectric constant, and as the temperature rises, it can be used to make heated electrical insulation products. Its breakdown voltage is also very high, and it is suitable for use as electrical accessories, etc. It has good voltage resistance and arc resistance. The water flow passing through the water pipe 400 made of PP material is easier to be detected by the detection component 200 to detect the state of the water flow.

[0048] In one embodiment, the wall thickness of the water pipe 400 is in the range of 1 mm-2 mm, and / or the outer diameter of the water pipe 400 is in the range of 6 mm-8 mm. Specifically, the wall thickness of the water pipe 400 may be limited to 1 mm-2 mm, or the outer diameter of the water pipe 400 may be limited to 6 mm-8 mm, or the wall thickness of the water pipe 400 may be limited to 1 mm-2 mm, and the outer diameter of the water pipe 400 may be limited to 6 mm-8 mm at the same time, and no specific limitation is made to this.

[0049] In order to ensure the accuracy of the detection of the detection component 200, the thickness of the water pipe 400 should not be too thick, and in order to facilitate the production of the water pipe 400 and prevent the too thin water pipe 400 from being easily broken by force, the wall thickness of the water pipe 400 is limited to between 1mm and 2mm, and the preferred range is 1mm-1.5mm. The specific values ​​of the wall thickness of the water pipe 400 can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm. In this embodiment, the wall thickness of the water pipe 400 is 1.1mm, which will not be easily broken on the one hand, and it is also convenient for the detection component 200 to detect the state of the water flow passing through it.

[0050] Similarly, in order to adapt to the diameter of the hose in the tea bar machine or other types of drinking water equipment using the capacitive sensor 10, and at the same time ensure the water flow through the water pipe 400, the outer diameter range of the water pipe 400 is limited to between 6mm and 8mm, and can be 6mm, 6.1mm, 6.2mm, 6.3mm, 6.4mm, 6.5mm, 6.6mm, 6.7mm, 6.8mm, 6.9mm, 7mm, 7.1mm, 7.2mm, 7.3mm, 7.4mm, 7.5mm, 7.6mm, 7.7mm, 7.8mm, 7.9mm, 8mm.

[0051] As for the installation method of the detection component 200, in one embodiment, the detection component 200 can be directly installed in the housing 100 through the installation port 121, and then the housing 100 is sealed by the sealing member 300 disposed in the installation port 121. In another embodiment, the housing 100 includes a bottom shell 110 and an end cover 120, and the bottom shell 110 and the end cover 120 are connected together by snapping, and the detection component 200 can be first installed in the bottom shell 110, and then the end cover 120 is sleeved on one end of the bottom shell 110 and the two are snapped together to achieve the installation of the detection component 200.

[0052] See also Figure 6 On the basis of the previous embodiment, the end cover 120 is provided with a sinking groove 122 corresponding to the bottom shell 110. When the bottom shell 110 and the end cover 120 are engaged, the end of the bottom shell 110 extends into the sinking groove 122, or the end surface of the bottom shell 110 abuts against the bottom of the sinking groove 122. Specifically, the end cover 120 is provided with a sinking groove 122 corresponding to the edge of the bottom shell 110. When the bottom shell 110 and the end cover 120 are engaged, the end of the bottom shell 110 can extend into the sinking groove 122 at least partially, or can extend into the sinking groove 122 completely and abut against the bottom of the sinking groove 122. Through the design of the groove 122, the edge of the end cover 120 can cover the edge of the bottom shell 110, avoiding an obvious gap between the bottom shell 110 and the end cover 120 after the two are snapped together, and preventing water vapor or water mist from entering the shell 100 through the fitting between the bottom shell 110 and the end cover 120, further improving the waterproof performance of the capacitive sensor 10, and avoiding the situation where the detection board 210 is damaged by moisture or water and cannot work.

[0053] See also Figure 5 and Figure 6 In one embodiment, a limiting slot 130 is provided in the housing 100, and the detection plate 210 is provided in the limiting slot 130. The setting of the limiting slot 130 facilitates the installation of the detection plate 210 on the one hand, and also facilitates the position of the limiting plate installed in the housing 100 for limiting and fixing, so as to prevent the position from being shifted when subjected to external force, thereby affecting the detection effect.

[0054] Furthermore, the limiting slide groove 130 includes a first slide groove 131 arranged in the bottom shell 110 and a second slide groove 132 arranged in the end cover 120. When the detection plate 210 is installed in the shell 100, the position of the detection plate 210 is limited by the first slide groove 131 and the second slide groove 132 to avoid the position of the limiting plate from being offset.

[0055] See also Figure 6In one embodiment, a card slot 320 is formed on the peripheral side of the seal 300, and the seal 300 is carded in the installation opening 121. Specifically, the seal 300 is carded and installed in the installation opening 121, and the installation method is simple and convenient. Furthermore, the seal 300 and the installation opening 121 are interference-fitted, which can further prevent water mist and the like from entering the housing 100 and causing damage to the detection board 210. Among them, the interference amount of the interference fit between the seal 300 and the installation opening 121 can be set to approximately 20%.

[0056] It is worth mentioning that the width of the slot 320 is less than or equal to the wall thickness at the installation port 121. Specifically, since the seal 300 has a certain thickness and the slot 320 is formed on the peripheral side of the seal 300, the slot 320 is a sink 122 formed on the peripheral side of the seal 300. The width of the slot 320 refers to the width between the two side walls of the sink 122; the wall thickness at the installation port 121 refers to the thickness of the housing 100 at the installation port 121 where the installation port 121 is opened. The slot width of the slot 320 can be less than the wall thickness at the installation port 121, or it can be equal to the wall thickness at the installation port 121, and it only needs to ensure that the slot width of the slot 320 is not greater than the wall thickness at the installation port 121. Preferably, the slot width of the slot 320 is slightly smaller than the wall thickness at the installation port 121 to ensure the stability of the clamping at the slot 320 and the installation port 121 and the sealing between the two.

[0057] See also Figure 5 and Figure 6 In one embodiment, the sealing member 300 is provided with a wire passing opening 330, and the water level sensor further comprises a data line 500, one end of the data line 500 is electrically connected to the detection board 210, and the other end extends out of the wire passing opening 330, and the data line 500 and the wire passing opening 330 are sealed and matched. Specifically, since the two ends of the data line 500 are respectively used to electrically connect the detection board 210 and other circuits in the tea bar machine, in order to facilitate the routing of the data line 500, the wire passing opening 330 is configured as a notch provided on the sealing member 300, and the data line 500 and the wire passing opening 330 are sealed and matched to prevent water mist from entering the housing 100 from the wire passing opening 330 and causing damage to the detection board 210.

[0058] The utility model also provides a tea bar machine, which includes the above-mentioned capacitive sensor. The specific structure of the capacitive sensor refers to the above-mentioned embodiment. Since the tea bar machine adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0059] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A capacitive sensor, characterized in that: The capacitive sensor comprises: case; a detection assembly, disposed in the housing, the detection assembly comprising a detection board and a detection coil, the detection coil being connected to the detection board and having a through hole; and A water pipe passes through the shell and is located in the through hole. The water pipe is made of hard plastic.

2. The capacitive sensor according to claim 1, characterized in that: One side of the shell is provided with a first tube hole for the water pipe to pass through, and the other side is provided with a second tube hole for the water pipe to pass through. The water pipe passes through the first tube hole, the through hole and the second tube hole in sequence, and is sealed with the first tube hole and the second tube hole.

3. The capacitive sensor according to claim 2, characterized in that: The outer wall of the water pipe is provided with a limiting convex rib, and the limiting convex rib is located between the shell and the detection coil, and the detection coil presses the limiting convex rib against the shell.

4. The capacitive sensor according to claim 3, characterized in that: An abutment portion is disposed on the inner wall surface of the shell corresponding to the outer periphery of the first tube hole, the limiting convex rib is located between the abutment portion and the detection coil, and the detection coil presses the limiting convex rib against the abutment portion.

5. The capacitive sensor according to claim 2, characterized in that: The outer wall of the water pipe is provided with a limiting convex rib, and the outer wall surface of the shell body corresponding to the outer periphery of the first pipe hole is provided with a limiting hook, and the limiting hook is limitedly matched with the limiting convex rib.

6. The capacitive sensor according to claim 1, wherein: The hard plastic is any one of PP, PCTG, HIPS or ABC.

7. The capacitive sensor according to claim 1, wherein: The wall thickness of the water pipe is in the range of 1mm-2mm, and / or the outer diameter of the water pipe is in the range of 6mm-8mm.

8. The capacitive sensor according to claim 1, wherein: The housing comprises a bottom shell and an end cover, and the bottom shell and the end cover are snap-connected.

9. The capacitive sensor according to claim 8, characterized in that: The end cover is provided with a sink groove corresponding to the bottom shell. When the bottom shell and the end cover are clamped, the end of the bottom shell extends into the sink groove, or the end surface of the bottom shell abuts against the bottom of the sink groove.

10. The capacitive sensor according to claim 1, wherein: A limiting sliding groove is arranged in the shell, and the detection plate is arranged in the limiting sliding groove.

11. The capacitive sensor according to claim 1, wherein: The detection coil is arranged in a spiral spring shape.

12. The capacitive sensor according to claim 2, characterized in that: The capacitive sensor further comprises a sealing member, a mounting opening is provided on a side of the housing away from the first tube hole, the sealing member is sealingly disposed in the mounting opening, and the second tube hole is formed in the sealing member.

13. The capacitive sensor according to claim 12, wherein: The water pipe is interference fit with the first pipe hole and the second pipe hole.

14. The capacitive sensor according to claim 12, wherein: A clamping groove is formed on the peripheral side of the sealing member, and the sealing member is clamped in the installation opening.

15. A tea bar machine, characterized in that: Comprising a capacitive sensor as claimed in any one of claims 1 to 14.

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