A pressure temperature sensor

Abstract

This application relates to the field of sensor technology, and in particular to a pressure and temperature sensor, comprising an electrical connector, a mounting shell fitted onto the electrical connector, a positioning seat between the mounting shell and the electrical connector, a pressure sensing module mounted on the positioning seat, a mounting groove for accommodating the pressure sensing module on the positioning seat, a pressure-conducting connector for transmitting pressure signals between the pressure sensing module and the electrical connector, a pressure-measuring hole between the inner and outer walls of the mounting shell, a sealing groove in the positioning seat communicating with the pressure-measuring hole, a leak-proof sealing component between the pressure sensing module and the pressure-measuring hole on the mounting shell, and a hollow, open-end temperature-conducting cylinder mounted on the mounting shell, the open end of the temperature-conducting cylinder communicating with the inner wall of the mounting shell, a thermistor mounted inside the temperature-conducting cylinder, and a temperature-conducting connector for transmitting temperature signals between the thermistor and the electrical connector. This application has the effect of improving the service life of the sensor.

Description

Technical Field

[0001] This application relates to the field of sensor technology, and in particular to a pressure and temperature sensor. Background Technology

[0002] A temperature and pressure sensor is a sensor that integrates pressure measurement and temperature measurement. It can simultaneously measure temperature and pressure signals and convert these signals into electrical signals or other desired signal outputs according to certain rules.

[0003] Chinese Patent CN115144134A discloses a sensor and valve assembly, including a housing, a circuit board, and a temperature sensing element. The sensor has an inner cavity, and the circuit board is housed in the inner cavity. The housing includes a first connector portion and a second connector portion that are fixed to each other. The temperature sensing element includes a first part and a second part that are connected to each other. The first part has a temperature sensing area. The second part is electrically connected to the first part and the circuit board. The first part can be a packaged thermistor, and its exterior is made of a resin-based composite material, which has a certain degree of corrosion resistance.

[0004] Since thermistors are directly exposed to the medium, although there is technology to coat the thermistors and pins with plastic, the plastic coating material is prone to damage when exposed to the outside for a long time. This can easily lead to short circuits when the thermistor measures liquid media, seriously affecting the long-term stable use of the thermistor, which is a shortcoming. Utility Model Content

[0005] To address the issue of thermistors being directly exposed to the medium, this application provides a pressure-temperature sensor.

[0006] The pressure and temperature sensor provided in this application adopts the following technical solution: A pressure-temperature sensor includes an electrical connector, a mounting shell fitted onto the electrical connector, an outer sealing element for sealing between the mounting shell and the electrical connector, a positioning seat between the mounting shell and the electrical connector, a pressure sensing module mounted on the positioning seat, a mounting groove on the positioning seat for accommodating the pressure sensing module, a pressure-conducting connector for transmitting pressure signals between the pressure sensing module and the electrical connector, a pressure measuring hole between the inner and outer walls of the mounting shell, a sealing groove on the positioning seat communicating with the pressure measuring hole, a leak-proof element for sealing between the pressure sensing module and the pressure measuring hole on the mounting shell, a hollow, open-ended temperature-conducting cylinder on the mounting shell, the open end of the temperature-conducting cylinder communicating with the inner wall of the mounting shell, a thermistor inside the temperature-conducting cylinder, and a temperature-conducting connector for transmitting temperature signals between the thermistor and the electrical connector.

[0007] By adopting the above technical solution, the pressure of the medium is transmitted to the pressure sensing module through the pressure measuring hole. The pressure sensing module transmits the pressure information of the medium to the electrical connector through the pressure-conducting connector. At the same time, the medium transfers the temperature to the thermistor through heat transfer. The thermistor feeds back the temperature information of the medium to the electrical connector through the temperature-conducting connector. Then, the electrical connector feeds back both the pressure and temperature information of the medium to the external processing equipment. In this process, the outer seal, the temperature-conducting cylinder, and the leak-proof component prevent the medium from directly contacting the thermistor, reducing the possibility of damage to the thermistor.

[0008] Optionally, the temperature-conducting cylinder is integrally formed on the mounting shell.

[0009] By adopting the above technical solution, the sealing performance between the temperature-conducting cylinder and the mounting shell is improved.

[0010] Optionally, the electrical connector includes a plug and a conductive pin, the plug being made of insulating material and the conductive pin being embedded in the plug.

[0011] By adopting the above technical solutions, the overall safety performance of electrical joints can be improved.

[0012] Optionally, the outer sealing member includes a first sealing ring fitted onto the plug connector, the plug connector having a circumferentially open sealing groove for receiving the first sealing ring, the circumferentially inner sidewall of the mounting shell abutting against the first sealing ring, and the top open end of the mounting shell being screwed onto the plug connector.

[0013] By adopting the above technical solution, during the assembly process, the mounting shell will squeeze the first sealing ring under the action of the spinning pressure. At this time, the first sealing ring will fill the sealing groove of the plug through deformation, thereby achieving the sealing effect between the plug and the mounting shell.

[0014] Optionally, the leak-proof component includes a second sealing ring disposed between the pressure sensing module and the mounting housing, wherein the outer circumferential wall of the second sealing ring abuts against the inner circumferential wall of the sealing groove, the pressure measuring hole is located inside the second sealing ring, and the second sealing ring presses the pressure sensing module against the connector.

[0015] By adopting the above technical solution, during the assembly process, the pressure sensing module will squeeze the second sealing ring. The second sealing ring achieves a seal between the pressure measuring hole and the pressure sensing module through deformation. At the same time, the reaction force of the deformation of the second sealing ring will press the pressure sensing module against the connector, reducing the possibility of the pressure sensing module being directly damaged by the impact of the connector, which is conducive to improving the product qualification rate.

[0016] Optionally, the temperature-conducting connector includes an intermediate circuit board disposed on the mounting housing, a wire is disposed between the intermediate circuit board and the thermistor, a temperature-conducting metal spring is disposed between the intermediate circuit board and the electrical connector, and a clearance groove is provided on the positioning seat for the temperature-conducting metal spring to pass through.

[0017] By adopting the above technical solution, the thermistor transmits the temperature information of the medium to the intermediate circuit board through the wire, and the intermediate circuit board transmits the information to the electrical connector through the temperature-conducting metal spring. By using the intermediate circuit board, the pressure sensing module is bypassed, which reduces the difficulty of drilling or slotting on the pressure sensing module.

[0018] In summary, this application includes at least one of the following beneficial technical effects: 1. The pressure of the medium is transmitted to the pressure sensing module through the pressure measuring hole. The pressure sensing module transmits the pressure information of the medium to the electrical connector through the pressure-conducting connector. At the same time, the medium transfers the temperature to the thermistor through heat transfer. The thermistor feeds back the temperature information of the medium to the electrical connector through the temperature-conducting connector. Then, the electrical connector feeds back both the pressure and temperature information of the medium to the external processing equipment. In this process, the outer seal, the temperature-conducting cylinder and the leak-proof component prevent the medium from directly contacting the thermistor, reducing the possibility of damage to the thermistor. 2. During the assembly process, the mounting shell will squeeze the first sealing ring under the action of the spinning pressure. At this time, the first sealing ring will fill the sealing groove of the plug through deformation, thereby achieving the sealing effect between the plug and the mounting shell. 3. During assembly, the pressure sensing module will compress the second sealing ring. The second sealing ring achieves a seal between the pressure measuring hole and the pressure sensing module through deformation. At the same time, the reaction force of the deformation of the second sealing ring will press the pressure sensing module against the connector, reducing the possibility of the pressure sensing module being directly damaged by the impact of the connector, which helps to improve the product qualification rate. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0020] Figure 2 This is a cross-sectional view in the embodiments of this application used to illustrate the positional relationship between the pressure sensing module, the first sealing ring, and the thermistor.

[0021] Figure 3 This is a cross-sectional view in the embodiments of this application used to illustrate the positional relationship between the thermally conductive metal spring, the pressure-conducting connector, and the intermediate circuit board.

[0022] Explanation of reference numerals in the attached drawings: 1. Electrical connector; 101. Plug; 102. Conductive pin; 2. Mounting housing; 3. Outer seal; 31. First sealing ring; 32. Sealing groove; 4. Positioning seat; 5. Pressure sensing module; 6. Installation groove; 7. Pressure guiding connector; 8. Pressure measuring hole; 9. Sealing groove opening; 10. Second sealing ring; 11. Temperature conducting cylinder; 12. Thermistor; 13. Temperature conducting connector; 131. Intermediate circuit board; 132. Wire; 133. Temperature conducting metal spring; 134. Clearance groove. Detailed Implementation

[0023] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0024] This application discloses a pressure-temperature sensor.

[0025] Reference Figure 1 and Figure 2 A pressure and temperature sensor includes an electrical connector 1, which includes a plug 101 and a plurality of conductive pins 102. The conductive pins 102 are made of metal material, and the plug 101 can be made of plastic insulating material in the prior art. The plurality of conductive pins 102 are pre-embedded in the plug 101.

[0026] Reference Figure 2 and Figure 3 An installation shell 2 is fitted onto the electrical connector 1. The open top end of the installation shell 2 is screwed onto the plug connector 101. An outer sealing element 3 for sealing is arranged between the installation shell 2 and the plug connector 101.

[0027] Reference Figure 2 The outer sealing member 3 includes a first sealing ring 31 fitted onto the plug connector 101. The first sealing ring 31 may be made of silicone rubber material in the prior art. The plug connector 101 has a sealing groove 32 circumferentially opened for accommodating the first sealing ring 31. The inner circumferential sidewall of the mounting shell 2 abuts against the first sealing ring 31.

[0028] Reference Figure 2 A positioning seat 4 is arranged between the mounting housing 2 and the electrical connector 1. The positioning seat 4 is inserted into the mounting housing 2. A pressure sensing module 5 is arranged on the positioning seat 4. A mounting groove 6 for accommodating the pressure sensing module 5 is opened on the positioning seat 4. A pressure guiding connector 7 is arranged between the pressure sensing module 5 and the conductive pin 102 on the electrical connector 1. The pressure guiding connector 7 can be a metal spring sheet in the prior art. A pressure measuring hole 8 is opened between the inner and outer walls of the mounting housing 2.

[0029] Reference Figure 2 The positioning base 4 has a sealing groove 9 on its mounting slot 6 that communicates with the pressure measuring hole 8. A leak-proof component for sealing is arranged between the pressure sensing module 5 and the pressure measuring hole 8 on the mounting shell 2.

[0030] Reference Figure 2 The leak-proof component includes a second sealing ring 10 disposed between the pressure sensing module 5 and the mounting housing 2. The second sealing ring 10 may be made of silicone rubber material in the prior art. The outer circumferential wall of the second sealing ring 10 abuts against the inner circumferential wall of the sealing groove 9. The pressure measuring hole 8 is located inside the ring of the second sealing ring 10. The second sealing ring 10 presses the pressure sensing module 5 against the connector 101.

[0031] Reference Figure 1 , Figure 2 and Figure 3 The mounting shell 2 has an integrally formed heat-conducting cylinder 11 with a hollow interior and an open end. The open end of the heat-conducting cylinder 11 is connected to the inner wall of the mounting shell 2. A thermistor 12 is arranged inside the heat-conducting cylinder 11. A heat-conducting connector 13 for transmitting temperature signals is arranged between the thermistor 12 and the electrical connector 1.

[0032] Reference Figure 2 and Figure 3 The thermally conductive connector 13 includes an intermediate circuit board 131 arranged on the mounting housing 2. A wire 132 is welded between the intermediate circuit board 131 and the thermistor 12. A thermally conductive metal spring 133 is arranged between the intermediate circuit board 131 and the electrical connector 1. A clearance groove 134 is provided on the positioning seat 4 for the thermally conductive metal spring 133 to pass through.

[0033] During assembly, the first sealing ring 31 deforms to seal between the connector 101 and the mounting shell 2, and the second sealing ring 10 deforms to seal between the pressure measuring hole 8 and the pressure sensing module 5. During measurement, the pressure of the medium is transmitted to the pressure sensing module 5 through the pressure measuring hole 8 on the mounting shell 2, and the pressure sensing module 5 transmits the pressure information of the medium to the electrical connector 1 through the pressure guiding connector 7.

[0034] Meanwhile, the medium transfers its temperature to the thermistor 12 via the heat-conducting cylinder 11 through heat transfer. The thermistor 12 then feeds back the temperature information of the medium to the intermediate circuit board 131 via the wire 132. The intermediate circuit board 131 then transmits the information to the electrical connector 1 via the heat-conducting metal spring 133. By using the intermediate circuit board 131, the pressure sensing module 5 is bypassed, reducing the difficulty of drilling or slotting on the pressure sensing module 5.

[0035] The electrical connector 1 will feed back the pressure and temperature information of the medium to the external processing equipment. During this process, the first sealing ring 31, the temperature conducting cylinder 11 and the second sealing ring 10 prevent the medium from directly contacting the thermistor 12, which helps to improve the service life of the sensor.

[0036] The implementation principle of a pressure and temperature sensor according to an embodiment of this application is as follows: During the assembly process, the first sealing ring 31 will seal the connection between the connector 101 and the mounting shell 2 through deformation, and the second sealing ring 10 will seal the connection between the pressure measuring hole 8 and the pressure sensing module 5 through deformation. During the measurement process, the pressure of the medium is transmitted to the pressure sensing module 5 through the pressure measuring hole 8 on the mounting shell 2, and the pressure sensing module 5 transmits the pressure information of the medium to the electrical connector 1 through the pressure guiding connector 7.

[0037] Meanwhile, the medium transfers its temperature to the thermistor 12 via the heat-conducting cylinder 11 through heat transfer. The thermistor 12 then feeds back the temperature information of the medium to the intermediate circuit board 131 via the wire 132. The intermediate circuit board 131 then transmits the information to the electrical connector 1 via the heat-conducting metal spring 133. By using the intermediate circuit board 131, the pressure sensing module 5 is bypassed, reducing the difficulty of drilling or slotting on the pressure sensing module 5.

[0038] The electrical connector 1 will feed back the pressure and temperature information of the medium to the external processing equipment. During this process, the first sealing ring 31, the temperature conducting cylinder 11 and the second sealing ring 10 prevent the medium from directly contacting the thermistor 12, which helps to improve the service life of the sensor.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pressure-temperature sensor, comprising an electrical connector (1), wherein a mounting shell (2) is fitted onto the electrical connector (1), characterized in that: An outer sealing element (3) is provided between the mounting housing (2) and the electrical connector (1) for sealing. A positioning seat (4) is provided between the mounting housing (2) and the electrical connector (1). A pressure sensing module (5) is provided on the positioning seat (4). A mounting groove (6) for accommodating the pressure sensing module (5) is provided on the positioning seat (4). A pressure-conducting connector (7) for transmitting pressure signals is provided between the pressure sensing module (5) and the electrical connector (1). A pressure measuring hole (8) is opened between the inner and outer walls of the mounting housing (2). The positioning seat (4) has... The mounting groove (6) has a sealing groove (9) that communicates with the pressure measuring hole (8). A leak-proof component for sealing is provided between the pressure sensing module (5) and the pressure measuring hole (8) on the mounting shell (2). A temperature-conducting cylinder (11) with a hollow interior and one open end is provided on the mounting shell (2). The open end of the temperature-conducting cylinder (11) communicates with the inner wall of the mounting shell (2). A thermistor (12) is provided inside the temperature-conducting cylinder (11). A temperature-conducting connector (13) for transmitting temperature signals is provided between the thermistor (12) and the electrical connector (1).

2. A pressure and temperature sensor according to claim 1, characterized in that: The temperature-conducting cylinder (11) is integrally formed on the mounting shell (2).

3. A pressure-temperature sensor according to claim 2, characterized in that: The electrical connector (1) includes a plug (101) and a conductive pin (102). The plug (101) is made of insulating material, and the conductive pin (102) is embedded in the plug (101).

4. A pressure-temperature sensor according to claim 3, characterized in that: The outer sealing member (3) includes a first sealing ring (31) sleeved on the plug (101), the plug (101) having a sealing groove (32) circumferentially opened for accommodating the first sealing ring (31), the inner circumferential sidewall of the mounting shell (2) abutting against the first sealing ring (31), and the top open end of the mounting shell (2) being screwed onto the plug (101).

5. A pressure-temperature sensor according to claim 3, characterized in that: The leak-proof component includes a second sealing ring (10) disposed between the pressure sensing module (5) and the mounting shell (2). The outer circumferential wall of the second sealing ring (10) abuts against the inner circumferential wall of the sealing groove (9). The pressure measuring hole (8) is located inside the ring of the second sealing ring (10). The second sealing ring (10) presses the pressure sensing module (5) against the connector (101).

6. A pressure and temperature sensor according to claim 5, characterized in that: The thermally conductive connector (13) includes an intermediate circuit board (131) disposed on the mounting shell (2), a wire (132) is disposed between the intermediate circuit board (131) and the thermistor (12), a thermally conductive metal spring (133) is disposed between the intermediate circuit board (131) and the electrical connector (1), and a clearance groove (134) is provided on the positioning seat (4) for the thermally conductive metal spring (133) to pass through.

Images