High-pressure resistant waterproof pressure switch with check valve

Abstract

The utility model provides a kind of high-pressure-resistant waterproof pressure switch with check valve, the first chamber is inside the shell, the shell is equipped with water inlet and water outlet, the water inlet, the water outlet are communicated with the first chamber, check valve is set in the water inlet;The shell inside still has the second chamber being communicated with the first chamber, switch module is set in the second chamber;The switch module includes diaphragm, pusher assembly, compression ring and switch assembly arranged in sequence, the diaphragm insulates the first chamber and the second chamber, the outer wall of the compression ring is fusedly connected with the inner wall of the second chamber, first guide hole for the pusher assembly to pass through is formed on the compression ring;When the diaphragm is pressed and deformed, the pusher assembly is driven to push the switch assembly to switch;The utility model can realize the automatic start-stop of water making, and has the function of preventing water backflow and high-pressure bearing capacity.

Description

Technical Field

[0001] This utility model belongs to the field of pressure switch technology, specifically relating to a high-pressure resistant and waterproof pressure switch with a check valve. Background Technology

[0002] Pressure switches prevent the water purifier from operating continuously under high pressure, protecting the equipment from damage and preventing damage to the pressure tank due to excessive pressure. They also play a control and protection role in the circuit. Additionally, they protect the booster pump under low pressure conditions, preventing it from operating and being damaged when there is a lack of water or the water pressure is too low.

[0003] The pressure switches in existing water purifiers typically only have high-pressure and low-pressure control. In low-pressure conditions, the switch can be turned off to stop the device from producing water. However, in practical applications, it has been found that water flows in reverse when water production stops, affecting normal use. Furthermore, the switching components of existing pressure switches have low pressure resistance and are prone to damage under high-pressure conditions. Summary of the Invention

[0004] To address the shortcomings of the existing technology, this utility model provides a high-pressure resistant and waterproof pressure switch with a check valve, which can realize automatic start and stop of water production, and has the function of preventing water backflow and high pressure resistance.

[0005] The technical effects to be achieved by this utility model are realized through the following technical aspects: This utility model provides a high-pressure resistant and waterproof pressure switch with a check valve, including a housing, the housing having a first chamber inside, the housing having an inlet and an outlet, the inlet and the outlet being connected to the first chamber, and a check valve being provided inside the inlet; The housing also has a second chamber that communicates with the first chamber, and a switch module is installed in the second chamber. The switching module includes a diaphragm, a pushing component, a pressing ring, and a switching component arranged in sequence. The diaphragm isolates the first chamber and the second chamber. The outer wall of the pressing ring is spun-welded to the inner wall of the second chamber. A first guide hole is formed on the pressing ring for the pushing component to pass through. When the diaphragm is deformed by pressure, it drives the pushing component to push the switching component to switch.

[0006] In some implementations, the pushing assembly includes a first spring and a push rod, and a limiting groove for mounting the first spring is formed on one end of the clamping ring near the diaphragm, and the push rod passes through the first guide hole; When the diaphragm is deformed under pressure, it drives the first spring to switch and pushes the top rod to press the switch assembly to switch, thereby realizing automatic start and stop control of water production.

[0007] In some implementations, the switch module further includes a first washer located between the diaphragm and the first spring sheet, which is used to limit the edge of the first spring sheet and ensure the installation stability and operational stability of the first spring sheet.

[0008] In some implementations, the switch assembly includes a switch base and a common terminal and a normally closed terminal passing through the switch base, wherein the outer wall of the switch base is sealed to the inner wall of the second chamber; A second spring is connected to one end of the common terminal near the top rod, and a first contact is provided on the end of the second spring away from the common terminal; A second contact is provided on the normally closed terminal near the top rod; When the diaphragm is compressed, it drives the pushing component to push the second spring, causing the first contact to disconnect from the second contact.

[0009] In some implementations, the check valve includes a valve sleeve, a valve core, and a valve seat arranged sequentially along the water inlet direction. The valve sleeve and the valve seat are coaxially connected. A first flow hole is formed on the valve sleeve at the end away from the valve seat. A limiting step is formed in the first flow hole at the end near the valve seat. A second guide hole is formed on the valve seat at the end near the valve sleeve. One end of the valve core is inserted into the second guide hole, and the other end of the valve core abuts against the limiting step, thereby realizing the function of unidirectional water flow.

[0010] In some implementations, a first retaining ring and a second retaining ring are sequentially formed on the valve core near the valve sleeve, and a first sealing ring is provided between the first retaining ring and the second retaining ring; The first sealing ring abuts against the limiting step to ensure that the water flow will not overflow in reverse.

[0011] In some implementations, a filter screen is also provided inside the water inlet. Along the water inlet direction, the filter screen is located at the front end of the check valve and plays a filtering role on the water flow in the water inlet.

[0012] In some implementations, the inlet and outlet are located in the same direction to accommodate unidirectional connection requirements.

[0013] In some implementations, the inlet and outlet are located in different directions to accommodate different plug-in requirements.

[0014] In some implementations, both the inlet and outlet are equipped with internal clamps for connecting to external pipes, enabling quick connection and disassembly with external pipes.

[0015] In summary, this utility model has at least the following advantages: This utility model provides a high-pressure resistant and waterproof pressure switch with a check valve. When the water production pressure reaches the set disconnect value, the diaphragm deforms, driving the push component to switch the switch component, disconnecting the power supply and stopping the water production. When the pressure drops to the set reset value, the switch component resets, the power supply is connected, and water production starts, realizing automatic start and stop of water production. A check valve is installed at the inlet. When the inlet pressure is lower than the outlet pressure, the check valve closes to prevent water backflow. The outer wall of the clamping ring of the switch module is spun-welded to the inner wall of the second chamber, which can improve the high pressure resistance of the switch module and improve its stability and service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the pressure switch provided in Embodiment 1 of this utility model; Figure 2 Cross-sectional view of the pressure switch provided in Embodiment 1 of this utility model Figure 1 ; Figure 3 Cross-sectional view of the pressure switch provided in Embodiment 1 of this utility model Figure 2 ; Figure 4 An exploded view of the pressure switch provided in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the compression ring provided in Embodiment 1 of this utility model; Figure 6 This is a cross-sectional view of the valve sleeve and valve seat provided in Embodiment 1 of this utility model; Figure 7 This is a schematic diagram of the valve core provided in Embodiment 1 of this utility model; Figure 8 This is a schematic diagram of the pressure switch provided in Embodiment 2 of this utility model; Figure 9 This is a schematic diagram of the pressure switch provided in Embodiment 3 of this utility model; Figure 10 Cross-sectional view of the pressure switch provided in Embodiment 3 of this utility model Figure 1 ; Figure 11 for Figure 10 Enlarged view of section A; Figure 12 Cross-sectional view of the pressure switch provided in Embodiment 3 of this utility model Figure 2 ; Figure 13 An exploded view of the pressure switch provided in Embodiment 3 of this utility model; Marked in the image: 100. Shell; 110. First chamber; 120. Inlet; 130. Outlet; 140. Second chamber; 200, Check valve; 210, Valve sleeve; 211, First flow hole; 212, Limiting step; 220, Valve core; 221, First retaining ring; 222, Second retaining ring; 230, Valve seat; 231, Second guide hole; 300, Switch module; 310, Diaphragm; 320, Push assembly; 321, First spring; 322, Push rod; 330, Pressure ring; 331, First guide hole; 332, Limiting groove; 340, Switch assembly; 341, Switch base; 342, Common terminal; 343, Normally closed terminal; 344, Second spring; 345, First contact; 346, Second contact; 350, First washer; 400. First sealing ring; 500. Filter screen; 600, internal locking claw; 700, a block; 800, Second Washer; 900. Second sealing ring. Detailed Implementation

[0017] To facilitate understanding of the present invention, a more comprehensive description will be given below in conjunction with the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0018] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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 invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0021] For ease of understanding, it should be noted that the X-axis in the graph represents the horizontal direction, the Y-axis represents the vertical direction, and the Z-axis represents the vertical direction.

[0022] Example 1: Please refer to Figures 1 to 7 A high-pressure waterproof pressure switch with a check valve includes a housing 100, a first chamber 110 inside the housing 100, an inlet 120 and an outlet 130 in the housing 100, both of which are connected to the first chamber 110, and a check valve 200 is provided inside the inlet 120.

[0023] Specifically, both the inlet 120 and the outlet 130 are formed on the housing 100 and can be used to connect with external water inlet and outlet pipes. Both the inlet 120 and the outlet 130 are connected to the first chamber 110, so that the water flow at the inlet 120 can flow through the first chamber 110 to the outlet 130. A check valve 200 is provided at the inlet 120, which can be used to automatically close when the pressure at the inlet 120 is lower than the pressure at the outlet 130, so as to prevent water backflow.

[0024] Inside the housing 100, there is a second chamber 140 communicating with the first chamber 110. A switch module 300 is disposed in the second chamber 140. The switch module 300 includes a diaphragm 310, a push assembly 320, a clamping ring 330 and a switch assembly 340 arranged in sequence. The diaphragm 310 isolates the first chamber 110 and the second chamber 140. The outer wall of the clamping ring 330 is fused to the inner wall of the second chamber 140. A first guide hole 331 is formed on the clamping ring 330 for the push assembly 320 to pass through. When the diaphragm 310 is deformed by pressure, it drives the push assembly 320 to push the switch assembly 340 to switch.

[0025] A diaphragm 310 is positioned between the first chamber 110 and the second chamber 140 to isolate them, preventing water from entering the second chamber 140. Simultaneously, the diaphragm 310 deforms under the water pressure in the first chamber 110, thereby switching the switch module 300. The diaphragm 310, the push assembly 320, and the clamping ring 330 are coaxially mounted sequentially. The clamping ring 330 serves to limit the installation and guide the movement of the push assembly 320. The outer wall of the clamping ring 330 is fused to the inner wall of the second chamber 140, improving the connection stability between the clamping ring 330 and the second chamber 140, thus enhancing its high-pressure resistance. Under high water pressure, this ensures the connection stability between the clamping ring 330 and the second chamber 140.

[0026] Specifically, when the water pressure reaches the set disconnection value, the diaphragm 310 deforms, causing the push assembly 320 to move along the first guide hole 331 on the clamping ring 330, which in turn pushes the switch assembly 340 to switch, disconnecting the power supply and stopping the water production. When the pressure drops to the set reset value, the switch assembly 340 resets, the power supply is turned on, and water production is started, thus realizing automatic start and stop of water production.

[0027] In some implementations, reference Figure 2 The push assembly 320 includes a first spring 321 and a push rod 322. A limiting groove 332 for installing the first spring 321 is formed on the end of the clamping ring 330 near the diaphragm 310. The push rod 322 passes through the first guide hole 331. When the diaphragm 310 is deformed by pressure, it drives the first spring 321 to switch and pushes the push rod 322 to press the switch assembly 340 to switch, thereby realizing automatic start and stop control of water production.

[0028] The first spring plate 321 has a self-recovering capability. When there is no external force or the external force is less than its own elastic force, the first spring plate 321 can automatically switch to the initial state. For example, when the diaphragm 310 is deformed by pressure, specifically, the diaphragm 310 bulges from the direction of the first chamber 110 toward the direction of the second chamber 140. This bulging deformation acts on the first spring plate 321, causing the first spring plate 321 to bulge toward the push rod 322, thereby pushing the switch assembly 340 to switch, disconnecting the power supply and stopping the water production of the control device. When the water pressure drops to the set reset value, the bulging deformation of the diaphragm 310 is less than the elastic effect of the first spring plate 321. The first spring plate 321 quickly switches to the initial state, the switch assembly 340 resets, the power supply is turned on, and water production is started, realizing the automatic start and stop of water production.

[0029] In one example, the first spring 321 is a dome switch. A dome switch is a functional element designed based on the principle of metal elastic deformation. It can deform when pressed by the deformation of the diaphragm 310 and rebound quickly when released. Compared with the traditional method of setting only a push rod 322 between the diaphragm 310 and the switch assembly 340 for pushing, this embodiment will only respond quickly to the switching of the switch assembly 340 when the deformation of the diaphragm 310 is sufficient to drive the first spring 321 to deform and switch. It can switch the switch assembly 340 more sensitively and will not have the problem of poor switching.

[0030] In some implementations, reference Figure 2 The switch module 300 also includes a first washer 350, which is located between the diaphragm 310 and the first spring 321 and is used to limit the edge of the first spring 321 to ensure the installation stability and operation stability of the first spring 321.

[0031] In some implementations, reference Figure 3 The switch assembly 340 includes a switch base 341 and a common terminal 342 and a normally closed terminal 343 passing through the switch base 341. The outer wall of the switch base 341 is sealed to the inner wall of the second chamber 140.

[0032] A second spring 344 is connected to one end of the common terminal 342 near the push rod 322, and a first contact 345 is provided on the end of the second spring 344 away from the common terminal 342; a second contact 346 is provided on one end of the normally closed terminal 343 near the push rod 322.

[0033] When the diaphragm 310 is pressed, it drives the push assembly 320 to push the second spring 344, causing the first contact 345 to disconnect from the second contact 346.

[0034] Under normal conditions, the first contact 345 and the second contact 346 are in contact, meaning the power is on. When the diaphragm 310 is deformed under pressure, specifically, the diaphragm 310 bulges outward from the first chamber 110 towards the second chamber 140. This bulging deformation acts on the first spring 321, causing it to bulge outward towards the push rod 322. The push rod 322 pushes the second spring 344, causing the first contact 345 and the second contact 346 to disconnect, thus switching the switch assembly 340 and disconnecting the power. The control device stops water production; when the water pressure drops to the set reset value, the deformation of the diaphragm 310 is less than the elastic effect of the first spring 321, the first spring 321 quickly switches to the initial state, and the second spring 344 also quickly switches to the initial state. At this time, the push rod 322 loses the pushing force of the first spring 321, and at the same time is pushed by the second spring 344 to return to the initial state. The first contact 345 and the second contact 346 make contact and connect, the switch assembly 340 resets, the power is turned on, water production is started, and the automatic start and stop of water production is realized.

[0035] In some implementations, reference Figure 2 , Figure 5 and Figure 6 The check valve 200 includes a valve sleeve 210, a valve core 220, and a valve seat 230 arranged sequentially along the water inlet direction. The valve sleeve 210 and the valve seat 230 are coaxially connected. A first flow hole 211 is formed on the end of the valve sleeve 210 away from the valve seat 230. A limiting step 212 is formed on the end of the first flow hole 211 near the valve seat 230. A second guide hole 231 is formed on the end of the valve seat 230 near the valve sleeve 210. One end of the valve core 220 is inserted into the second guide hole 231, which guides the movement of the valve core 220, so that the valve core 220 moves only along the axis, ensuring the sealing effect. The other end of the valve core 220 abuts against the limiting step 212, realizing the function of unidirectional water flow.

[0036] When water flows in from the inlet 120, the water pressure pushes the valve core 220 from the valve sleeve 210 toward the valve seat 230, which means the check valve 200 opens instantly, allowing water to flow smoothly. When the water pressure at the inlet 120 is less than the water pressure at the outlet 130, the water flows from the outlet 130 toward the inlet 120, pushing the valve core 220 from the valve seat 230 toward the valve sleeve 210, which means the check valve 200 closes instantly.

[0037] Compared to the traditional method of setting a return spring in the check valve 200 for automatic reset, this embodiment eliminates the return spring and achieves the check valve function by automatically resetting through water flow pressure. Specifically, when water flows in from the inlet 120, the water flow pressure causes the check valve 200 to open completely instantly, and when the water flows in the opposite direction, the check valve 200 closes instantly, avoiding water flow noise caused by the return spring preventing it from opening completely.

[0038] Further reference Figure 7 A first retaining ring 221 and a second retaining ring 222 are sequentially formed on the valve core 220 near the valve sleeve 210. A first sealing ring 400 is provided between the first retaining ring 221 and the second retaining ring 222. The first sealing ring 400 abuts against the limiting step 212 to ensure that the water flow will not overflow in reverse.

[0039] The diameter of the first retaining ring 221 is larger than the inner diameter of the first sealing ring 400 but smaller than its outer diameter. This allows the first retaining ring 221 to extend into the first flow hole 211 and the first sealing ring 400 to abut against the limiting step 212 when the valve core 220 is installed, thus achieving a better sealing effect. The diameter of the second retaining ring 222 is larger than the outer diameter of the first sealing ring 400, providing support and blocking for the first sealing ring 400 to prevent it from being washed away by the water flow. At the same time, the second retaining ring 222 can sense water pressure from different directions, enabling the check valve 200 to open or close instantaneously.

[0040] In some embodiments, a filter screen 500 is also provided inside the water inlet 120. Along the water inlet direction, the filter screen 500 is located at the front end of the check valve 200 and plays a filtering role on the water flow of the water inlet 120.

[0041] Example 2: This embodiment makes further structural optimizations based on Embodiment 1. Please refer to... Figures 1-7 Based on the above, refer to Figure 8 .

[0042] In this embodiment, the inlet 120 and the outlet 130 are located in the same direction to meet the requirements of unidirectional insertion, making it convenient to quickly insert the water circuit module of the device and fix it to the device with screws.

[0043] Example 3: This embodiment makes further structural optimizations based on Embodiment 1. Please refer to... Figures 1-7 Based on the above, refer to Figures 9 to 13 .

[0044] In this embodiment, the inlet 120 and the outlet 130 are located in different directions to accommodate different insertion requirements.

[0045] Furthermore, both the inlet 120 and the outlet 130 are equipped with internal clamps 600 for connecting to external pipes, which enable quick connection and quick disconnection of the inlet 120 and the outlet 130 with external pipes.

[0046] For the installation of the inner claw 600 at the inlet 120, one end of the inner claw 600 is engaged inside the cap 700, and then the cap 700 is engaged outside the inlet 120, so that the other end of the inner claw 600 is located inside the inlet 120. A second washer 800 and a second sealing ring 900 are sequentially arranged between the inner claw 600 and the inlet 120 along the water inlet direction. The second washer 800 limits the installation of the second sealing ring 900, and the second sealing ring 900 provides a sealing connection.

[0047] The installation of the inner clamp 600 at the outlet 130 is the same as the installation of the inner clamp 600 at the inlet 120.

[0048] Furthermore, the difference between this embodiment and Embodiment 1 is that the valve sleeve 210 and the housing 100 in this embodiment are integrally formed structures.

[0049] The above description is merely an example and illustration of the structure of this invention, and while the description is specific and detailed, it should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these obvious substitutions all fall within the protection scope of this invention.

Claims

1. A high-pressure resistant and waterproof pressure switch with a check valve, characterized in that, Includes a housing (100), the housing (100) having a first chamber (110) inside, the housing (100) having an inlet (120) and an outlet (130), the inlet (120) and the outlet (130) being connected to the first chamber (110), and a check valve (200) being provided inside the inlet (120); The housing (100) also has a second chamber (140) that communicates with the first chamber (110), and a switch module (300) is provided in the second chamber (140). The switching module (300) includes a diaphragm (310), a push assembly (320), a clamping ring (330), and a switching assembly (340) arranged sequentially. The diaphragm (310) isolates the first chamber (110) and the second chamber (140). The outer wall of the clamping ring (330) is fused to the inner wall of the second chamber (140). A first guide hole (331) is formed on the clamping ring (330) for the push assembly (320) to pass through. When the diaphragm (310) is deformed under pressure, it drives the push assembly (320) to push the switch assembly (340) to switch.

2. The high-pressure resistant and waterproof pressure switch with a check valve according to claim 1, characterized in that, The pushing assembly (320) includes a first spring (321) and a push rod (322). A limiting groove (332) for mounting the first spring (321) is formed on one end of the clamping ring (330) near the diaphragm (310). The push rod (322) passes through the first guide hole (331). When the diaphragm (310) is deformed under pressure, it drives the first spring (321) to switch and pushes the top rod (322) to press the switch assembly (340) to switch.

3. The high-pressure resistant and waterproof pressure switch with check valve according to claim 2, characterized in that, The switch module (300) further includes a first washer (350) located between the diaphragm (310) and the first spring (321) for limiting the edge of the first spring (321).

4. The high-pressure resistant and waterproof pressure switch with check valve according to claim 1, characterized in that, The switch assembly (340) includes a switch base (341) and a common terminal (342) and a normally closed terminal (343) passing through the switch base (341). The outer wall of the switch base (341) is sealed to the inner wall of the second chamber (140). A second spring (344) is connected to one end of the common terminal (342) near the top rod (322), and a first contact (345) is provided on one end of the second spring (344) away from the common terminal (342). A second contact (346) is provided on one end of the normally closed terminal (343) near the top rod (322). When the diaphragm (310) is pressed, it drives the pushing component (320) to push the second spring (344), causing the first contact (345) to disconnect from the second contact (346).

5. The high-pressure resistant and waterproof pressure switch with check valve according to claim 1, characterized in that, The check valve (200) includes a valve sleeve (210), a valve core (220), and a valve seat (230) arranged sequentially along the water inlet direction. The valve sleeve (210) and the valve seat (230) are coaxially connected. A first flow hole (211) is formed at the end of the valve sleeve (210) away from the valve seat (230). A limiting step (212) is formed at the end of the first flow hole (211) near the valve seat (230). A second guide hole (231) is formed at the end of the valve seat (230) near the valve sleeve (210). One end of the valve core (220) is inserted into the second guide hole (231), and the other end of the valve core (220) abuts against the limiting step (212).

6. The high-pressure resistant and waterproof pressure switch with check valve according to claim 5, characterized in that, A first retaining ring (221) and a second retaining ring (222) are sequentially formed on one end of the valve core (220) near the valve sleeve (210), and a first sealing ring (400) is provided between the first retaining ring (221) and the second retaining ring (222). The first sealing ring (400) abuts against the limiting step (212).

7. The high-pressure resistant and waterproof pressure switch with a check valve according to claim 1, characterized in that, The inlet (120) is also equipped with a filter screen (500), which is located at the front end of the check valve (200) along the water inlet direction.

8. The high-pressure resistant and waterproof pressure switch with a check valve according to any one of claims 1-7, characterized in that, The inlet (120) and the outlet (130) are located in the same direction.

9. The high-pressure resistant and waterproof pressure switch with a check valve according to any one of claims 1-7, characterized in that, The inlet (120) and the outlet (130) are located in different directions.

10. The high-pressure resistant and waterproof pressure switch with a check valve according to claim 9, characterized in that, Both the inlet (120) and the outlet (130) are equipped with internal clamps (600) for connecting to external pipes.

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