Hall type pressure switch

Abstract

The utility model relates to pressure switch technical field discloses a hall formula pressure switch, including base, the middle part of base is provided with PCBA, and the welding has hall chip on PCBA, the sleeve of pressure block is established on base, and the middle part of pressure block is connected with the top rod of penetration, and the one end of top rod is close to PCBA and is provided with the magnet of cooperation with hall chip, the outside sleeve of base is established with pressure pipe, and the pressure diaphragm of cooperation with top rod is arranged between pressure pipe and pressure block. The utility model adopts the hall chip of non - contact cooperation pressure diaphragm to realize pressure transmission, and pressure transmission information is accurate, and waterproof dustproof, adopts switch -quantity signal output, and no mechanical contact, and the output signal is not affected by the activity attrition, and the theoretical work life can reach million times, and there is no noise when working, and there is power stabilizing chip and anti -jamming circuit on PCBA, and is not affected by the outside input power fluctuation and electromagnetic interference.

Description

Technical Field

[0001] This utility model relates to the field of pressure switch technology, specifically a Hall effect pressure switch. Background Technology

[0002] Currently, most water dispenser pressure switches use mechanical pressure switches. These require a relatively large operating force, are prone to wear of the actuating contacts, and produce significant noise during operation. The internal springs are also susceptible to metal fatigue, leading to decreased elasticity and poor contact. Furthermore, mechanical pressure switches have a relatively complex structure, require cumbersome assembly processes, and demand high consistency in components. Due to the gaps in the mechanical switch, dust from the air can easily enter the switch, causing dust accumulation and resulting in poor contact. Utility Model Content

[0003] This invention provides a Hall effect pressure switch that solves the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A Hall effect pressure switch includes a base, a PCBA disposed in the middle of the base, a Hall chip soldered on the PCBA, a pressure block sleeved on the base, a push rod connected through the middle of the pressure block, a magnet cooperating with the Hall chip disposed at one end of the push rod near the PCBA, a pressure tube sleeved on the outer side of the base, and a pressure diaphragm cooperating with the push rod disposed between the pressure tube and the pressure block.

[0006] As a preferred embodiment of this invention, a compression spring is provided on the side of the pressure diaphragm near the top rod.

[0007] As a preferred embodiment of this invention, a sealing strip is provided between the pressure block and the pressure diaphragm.

[0008] As a preferred technical solution of this utility model, the base is fixed to the pressure tube by a self-tapping screw.

[0009] The present invention has the following advantages:

[0010] It uses a contactless Hall chip in conjunction with a pressure diaphragm to achieve pressure transmission. The pressure transmission information is accurate and waterproof and dustproof. It uses a switch signal output, has no mechanical contacts, and the output signal is not affected by wear and tear. The theoretical working life can reach millions of times. It is also noiseless during operation. The PCBA has a power supply regulator chip and anti-interference circuit, which is not affected by external input power fluctuations and electromagnetic interference. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is an exploded view of a Hall effect pressure switch.

[0013] In the diagram: 1. Pressure tube; 2. Pressure diaphragm; 3. Compression spring; 4. Pressure block; 5. Sealing strip; 6. Top rod; 7. Magnet; 8. PCBA; 9. Base; 10. Self-tapping screw. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] In one embodiment, see Figure 1 A Hall effect pressure switch includes a base 9, a PCBA8 disposed in the center of the base 9, and a Hall effect chip soldered onto the PCBA8. The base 9 is mounted on the back of the PCBA8 and, together with a self-tapping screw 10, secures the PCBA8 and covers the entire switch assembly. The PCBA8 has a Hall effect chip soldered on it, which senses changes in the magnetic field and outputs a switching signal; a voltage regulator chip to provide a stable operating voltage for the Hall effect chip; a pin assembly to provide a connection channel for power input and signal output; and other components to provide power and signal anti-interference capabilities and to ensure the output signal meets customer requirements.

[0016] In one embodiment, a pressure block 4 is fitted onto the base 9. A push rod 6 is connected through the middle of the pressure block 4. A magnet 7, which cooperates with the Hall chip, is provided at one end of the push rod 6 near the PCBA8. The pressure block 4 is pressed onto the back of the pressure diaphragm 2 and bonded to the pressure tube 1, thereby fixing the edge of the pressure diaphragm 2. The push rod 6 is pressed onto the back of the pressure diaphragm 2, enabling the pressure diaphragm 2 to press down when it expands and to push up when it contracts. The magnet 7 is mounted on the push rod 6, enabling the magnet 7 to fall and rise.

[0017] In one embodiment, a pressure tube 1 is sleeved on the outer side of the base 9, and a pressure diaphragm 2 that cooperates with the top rod 6 is disposed between the pressure tube 1 and the pressure block 4. The pressure diaphragm 2 is attached to the inside of the pressure tube 1 and is pressed together by the pressure spring 3, the pressure block 4 and the sealing strip 5 to realize the expansion and contraction of the pressure diaphragm 2; the pressure tube 1 is pressed together with the pressure diaphragm 2 to realize the pressure transmission function.

[0018] In one embodiment, a compression spring 3 is provided on the side of the pressure diaphragm 2 near the top rod 6. The compression spring 3 is attached to the back of the pressure diaphragm 2 to enhance the rigidity of the pressure diaphragm 2.

[0019] In one embodiment, a sealing strip 5 is provided between the pressure block 4 and the pressure diaphragm 2. The sealing strip 5 is installed between the pressure block 4 and the pressure diaphragm 2 to prevent external fluid from entering the switch.

[0020] Switch working principle:

[0021] When pressure pipe 1 is connected to the water tank of the water dispenser, pressure diaphragm 2 reaches a certain pressure, causing it to expand and thus move push rod 6 downward. Correspondingly, magnet 7 also moves downward. Hall chip senses the change in the Earth's magnetic field after magnet 7 falls. When the Hall chip's sensing threshold is reached, it outputs a high-level signal. The high-level signal is then output to the main control board through the connector, driving the solenoid valve to close the inlet valve and ensure that the water pressure in the water tank remains relatively stable.

[0022] This utility model applies to a Hall effect pressure switch, which uses a contactless Hall chip in conjunction with a pressure diaphragm 2 to achieve pressure transmission. The pressure transmission information is accurate, and it is waterproof and dustproof. It uses a switch signal output, has no mechanical contacts, and the output signal is not affected by wear and tear. The theoretical working life can reach millions of times, and it operates without noise. PCBA8 has a power supply regulator chip and anti-interference circuit, and is not affected by external power supply fluctuations and electromagnetic interference.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A Hall effect pressure switch characterized by, The device includes a base, a PCBA in the middle of the base, a Hall chip soldered on the PCBA, a pressure block on the base, a push rod through the middle of the pressure block, a magnet that cooperates with the Hall chip at the end of the push rod near the PCBA, a pressure tube on the outside of the base, and a pressure diaphragm that cooperates with the push rod between the pressure tube and the pressure block.

2. A Hall effect pressure switch according to claim 1, wherein A compression spring is provided on the side of the pressure diaphragm near the top rod.

3. A Hall effect pressure switch according to claim 1, wherein A sealing strip is provided between the pressure block and the pressure diaphragm.

4. A Hall effect pressure switch according to claim 1, wherein The base is fixed to the pressure tube by self-tapping screws.

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