Pressure sensor for water pump

Abstract

The utility model discloses a pressure sensor for a water pump. The pressure sensor comprises a shell, an upper cover, a base, a connector, a PCB, a pressure module and a flexible circuit board, the shell is arranged on the outer side of the upper cover and the outer side of the base, the upper cover is connected with the base, the connector is installed on the PCB, the base is provided with a through hole and a square groove, the part, extending into the base, of the pressure module is arranged in the through hole, a Hall sensor is installed on the PCB, and the pressure module is an MEMS pressure sensor. The water pressure and flow can be monitored, the use requirement of the water pump can be met, and intelligent control over the water pump can be achieved.

Description

Technical Field

[0001] This utility model relates to a pressure sensor for a water pump. Background Technology

[0002] Water pumps are mainly used for transporting liquids (such as water) and also for flow control. Traditional water pump control is relatively simple, only performing mechanical tasks. However, with the development of electrical equipment towards intelligence, intelligent water pumps are becoming more and more common, and some can be remotely controlled. However, with the gradual expansion of market demand and the acceleration of product updates and iterations, existing pressure sensors can no longer meet the needs of intelligent water pumps. To meet market demands, our company has developed a new type of pressure sensor for water pumps. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a water pump pressure sensor with a novel structure, suitable for water pumps, capable of monitoring water pressure and flow, meeting the needs of intelligent water pumps, and possessing practicality and wide applicability.

[0004] To solve the above problems, the present invention adopts the following technical solution:

[0005] A pressure sensor for a water pump includes a housing, a top cover, a base, a connector, a PCB board, a pressure module, and a flexible circuit board. The housing is disposed on the outside of the top cover and the base, and the top cover is connected to the base. The PCB board is disposed on the inside of the top cover, and the connector is mounted on the PCB board. The pressure module is mounted on the PCB board, and one end of the pressure module extends into the base. The base has a through hole and a square groove, and the portion of the pressure module extending into the base is disposed in the through hole. A Hall sensor is mounted on the PCB board, and the pressure module is a MEMS pressure sensor, which is mounted on the PCB board.

[0006] Preferably, the base has an inner groove one and an inner groove two at the through hole. The inner groove one has a sealing ring and the inner groove two has a gasket. The sealing ring and the gasket are fitted onto the pressure module.

[0007] This setup prevents water from entering the sensor's interior through the sealing ring, increases the stability of the pressure module after installation through the gasket, and also limits the movement of the sealing ring.

[0008] Preferably, a portion of the top cover extends to one end to form a groove structure, and the base is provided with a guide groove structure that cooperates with the groove structure. The groove structure is set in the guide groove structure. One end of the flexible circuit board is connected to the PCB board. One end of the flexible circuit board passes through the guide groove structure and the groove structure and extends into the square groove of the base. A magnet is installed on the portion of the flexible circuit board located in the square groove.

[0009] This setup, through the interaction of the wire groove structure and the guide groove structure, achieves the limiting of the flexible circuit board and the control of the magnet position.

[0010] Preferably, the upper cover is provided with a positioning groove, and the base is provided with a positioning boss that cooperates with the positioning groove.

[0011] This design, through the action of the positioning groove and the positioning boss, facilitates the positioning of the top cover and the base during assembly, increases the convenience of installation, and also helps to limit the position after installation.

[0012] Preferably, the PCB board has slots around its perimeter, and the base has limiting posts that cooperate with the slots.

[0013] This setup uses the limiting posts and slots to limit the position of the PCB board and simultaneously fix it in place.

[0014] Preferably, the pressure module has a pressure hole on the inner side of one end of the through hole, and one end of the pressure hole extends to the inner side of the pressure module.

[0015] This setup allows water to flow through a pressure orifice onto the silicon thin film of the MEMS pressure sensor. Pressure is measured by the changes in electrical parameters caused by the deformation of the silicon thin film, thus enabling accurate detection of water pressure.

[0016] The beneficial effects of this utility model are: it has a novel structure, is suitable for water pumps, detects water flow pressure through a MEMS pressure sensor to achieve water flow pressure monitoring, and detects changes in the magnetic field corresponding to the magnet through a Hall sensor to achieve water flow monitoring, thereby achieving the purpose of water pressure and flow rate monitoring, thus meeting the needs of intelligent water pumps. It has practicality and wide applicability. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below, but this is not a limitation on the protection scope of this utility model.

[0018] Figure 1 This is a schematic diagram of the disassembled state of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the bottom structure of this utility model;

[0021] Figure 4 This is a cross-sectional schematic diagram of the present invention;

[0022] Figure 5This is a schematic diagram of the pressure module installation of this utility model;

[0023] Figure 6 This is a schematic diagram of the upper cover structure of this utility model;

[0024] Figure 7 This is a schematic diagram of the base structure of this utility model;

[0025] Figure 8 This is a schematic diagram showing the connection between the top cover and the base of this utility model;

[0026] Figure 9 This is a schematic diagram of the connector circuit connection of this utility model.

[0027] The components are as follows: 1. Outer shell, 2. Top cover, 3. Base, 4. Connector, 5. PCB board, 6. Pressure module, 7. Gasket, 8. Sealing ring, 9. Flexible circuit board, 10. Through hole, 11. Cable groove structure, 12. Positioning groove, 13. Positioning boss, 14. Limiting post, 15. Inner groove one, 16. Inner groove two, 17. Through hole, 18. Square groove, 19. Card slot, 20. Pressure hole. Detailed Implementation

[0028] See Figures 1 to 9 The pressure sensor for a water pump shown includes a housing 1, a top cover 2, a base 3, a connector 4, a PCB board 5, a pressure module 6, and a flexible circuit board 8. The housing 1 is disposed on the outside of the top cover 2 and the base 3, and the top cover 2 is connected to the base 3. The PCB board 5 is disposed on the inside of the top cover 2, and the connector 4 is mounted on the PCB board 5. The pressure module 6 is mounted on the PCB board 5, and one end of the pressure module 6 extends into the base 3. The base 3 has a through hole 17 and a square groove 18. The portion of the pressure module extending into the base is disposed in the through hole. A Hall sensor (not shown) is mounted on the PCB board 5. The pressure module is a MEMS pressure sensor, and the MEMS pressure sensor is mounted on the PCB board.

[0029] Furthermore, the base 3 is provided with an inner groove 15 and an inner groove 2 16 at the through hole. The inner groove 15 is provided with a sealing ring 8, and the inner groove 2 16 is provided with a gasket 7. The sealing ring 8 and the gasket 7 are fitted onto the pressure module.

[0030] Furthermore, a portion of the upper cover 2 extends to one end to form a groove structure 11. The base 3 is provided with a guide groove structure that cooperates with the groove structure. The groove structure is set in the guide groove structure. One end of the flexible circuit board is connected to the PCB board. One end of the flexible circuit board 9 passes through the guide groove structure and the groove structure and extends into the square groove 18 of the base. A magnet (not shown) is installed on the portion of the flexible circuit board located in the square groove.

[0031] Furthermore, the upper cover 2 is provided with a positioning groove 12, and the base 3 is provided with a positioning boss 13 that cooperates with the positioning groove.

[0032] Furthermore, the PCB board 5 is provided with slots 19 around its perimeter, and the base 3 is provided with limiting posts 14 that cooperate with the slots 19.

[0033] Furthermore, the pressure module 6 has a pressure hole 20 located inside one end of the through hole, and one end of the pressure hole extends to the inside of the pressure module.

[0034] Furthermore, the upper cover 2 is provided with a through hole 10, through which part of the connector passes.

[0035] Furthermore, the outer shell 1 has a cylindrical structure.

[0036] Furthermore, the through hole, inner groove one, and inner groove two are connected in sequence.

[0037] Furthermore, the upper cover 2 and the base 3 are fixedly connected by the outer shell 1.

[0038] Furthermore, the connector is provided with four terminal interfaces: VCC, GND, VOUT-pressure, and VOUT-hall.

[0039] The pressure sensor of this utility model has a power supply voltage of 4.75-5.25V, a power supply current of 15mA, an operating temperature of 5-95℃, a safe pressure of 1600kpaG, a breaking pressure of 2500kpaG, and an output range of 10% to 90%Vcc.

[0040] When using this invention, the sensor is installed in the water pump by selecting or setting a position, and connected to an external water pump or corresponding control system via a connector; when there is water flow in the water pump, the position of the magnet will shift, and then the Hall sensor senses the change in the magnet through the change in the magnetic field, thereby judging the water flow condition;

[0041] Simultaneously, when water flows from the through-hole into the pressure hole, the pressure generated by the water acts on the silicon thin film of the MEMS pressure sensor, causing a certain amount of deformation in the silicon thin film. When the pressure difference causes the film to deform, the piezoresistive effect of the silicon material causes a change in resistance, resulting in an imbalance voltage signal output by the bridge circuit (four piezoresistors are integrated on the surface of the silicon thin film, forming a Wheatstone bridge structure). This signal is transmitted to the PCB board, which then transmits the signal to the control system via connectors. The control system converts the received signal into a digital signal, which is finally displayed through a specific display device to obtain the required pressure data.

[0042] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A pressure sensor for a water pump, characterized in that: The device includes a housing, a top cover, a base, a connector, a PCB board, a pressure module, and a flexible circuit board. The housing is located on the outside of the top cover and the base, and the top cover is connected to the base. The PCB board is located on the inside of the top cover, and the connector is mounted on the PCB board. The pressure module is mounted on the PCB board, and one end of the pressure module extends into the base. The base has a through hole and a square groove, and the portion of the pressure module extending into the base is located in the through hole. A Hall sensor is mounted on the PCB board, and the pressure module is a MEMS pressure sensor, which is mounted on the PCB board.

2. The pressure sensor for a water pump according to claim 1, characterized in that: The base has an inner groove 1 and an inner groove 2 at the through hole. The inner groove 1 has a sealing ring and the inner groove 2 has a gasket. The sealing ring and the gasket are fitted onto the pressure module.

3. A pressure sensor for a water pump according to claim 1, characterized in that: The upper cover extends to one end to form a groove structure. The base is provided with a guide groove structure that cooperates with the groove structure. The groove structure is set in the guide groove structure. One end of the flexible circuit board is connected to the PCB board. One end of the flexible circuit board passes through the guide groove structure and the groove structure and extends into the square groove of the base. Magnets are installed on the part of the flexible circuit board located in the square groove.

4. A pressure sensor for a water pump according to claim 1, characterized in that: The upper cover is provided with a positioning groove, and the base is provided with a positioning boss that cooperates with the positioning groove.

5. A pressure sensor for a water pump according to claim 1, characterized in that: The PCB board has slots around its perimeter, and the base has limiting posts that cooperate with the slots.

6. A pressure sensor for a water pump according to claim 1, characterized in that: The pressure module has a pressure hole on the inner side of one end of the through hole, and one end of the pressure hole extends to the inner side of the pressure module.

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