Temperature pressure sensor

Abstract

The utility model relates to the technical field of sensors, in particular to a temperature and pressure sensor which comprises an electrical connector, the electrical connector is sleeved with a shell, an installation cavity is defined by the shell and the electrical connector, an environment sealing ring is arranged between the shell and the electrical connector, a temperature assembly is arranged in the installation cavity, and the temperature assembly comprises a temperature and pressure sensing base. A temperature signal transmission elastic piece is arranged between the temperature and pressure sensing base and the electrical connector, a medium sealing ring is arranged below the temperature signal transmission elastic piece and located between the temperature and pressure sensing base and the shell, a thermistor is arranged on the temperature and pressure sensing base, and the sensing end of the thermistor extends out of the shell. The temperature and pressure sensing base is detachably connected with an isolation piece used for isolating a medium from the thermistor, the isolation piece is easy to conduct heat, and a pressure sensing module used for measuring pressure is arranged between the temperature and pressure sensing base and the electrical connector. The application has the effect of improving the direct contact between the thermistor and the medium.

Description

Technical Field

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

[0002] The temperature and pressure sensor is a sensor that combines pressure measurement and temperature measurement. It can measure temperature and pressure signals at the same time and convert these signals into electrical signals or other required signal outputs according to certain rules.

[0003] A Chinese patent with publication number CN212363278U discloses a temperature and pressure sensor assembly, including a circuit module, a pressure sensing element and a temperature sensing element. The temperature sensing element includes a conductive part and a head connected to the conductive part and used to sense the temperature of a fluid. The head is exposed to the environment to contact the medium.

[0004] Since the thermistor is directly exposed to the medium, although there is a technology to encapsulate the thermistor and pins, the encapsulation material is usually made of plastic and other materials. The encapsulation material is prone to damage when exposed to the outside for a long time, resulting in short circuit problems when the thermistor measures liquid media, seriously affecting the normal use of the thermistor, and there are shortcomings. Utility Model Content

[0005] In order to improve the problem that the thermistor is directly exposed to a medium, the present application provides a temperature and pressure sensor.

[0006] The temperature and pressure sensor provided in this application adopts the following technical solution:

[0007] A temperature and pressure sensor comprises an electrical connector, a shell is provided on the electrical connector, the shell and the electrical connector form an installation chamber, an environmental sealing ring is provided between the shell and the electrical connector, a temperature component for measuring temperature is provided in the installation chamber, the temperature component comprises a temperature and pressure sensing base, a temperature signal transmission spring is provided between the temperature and pressure sensing base and the electrical connector, a medium sealing ring is provided below the temperature signal transmission spring and between the temperature and pressure sensing base and the shell, a thermistor is provided on the temperature and pressure sensing base, the sensing end of the thermistor extends outside the shell, an isolating piece for isolating the medium from the thermistor is detachably connected to the temperature and pressure sensing base, the isolating piece is easy to conduct heat, and a pressure sensing module for measuring pressure is provided between the temperature and pressure sensing base and the electrical connector.

[0008] By adopting the above technical solution, the environmental sealing ring and the medium sealing ring reduce the possibility of the medium contacting the temperature signal transmission spring, ensuring the reliability of the temperature and pressure sensing base conducting the signal. The isolation component transfers the heat in the medium to the thermistor, which not only achieves the purpose of measuring the medium temperature, but also reduces the possibility of the thermistor directly contacting the medium and causing short circuit and corrosion, while measuring the pressure value of the medium.

[0009] Optionally, a welding groove is provided on the temperature and pressure sensing base, two NTC connection terminals are arranged in the welding groove, and two leads of the thermistor are respectively arranged on the two NTC connection terminals.

[0010] By adopting the above technical solution, it is helpful to fix the thermistor on the temperature and pressure sensing base, and it is also helpful for the thermistor to transmit the signal to the electrical connector through the temperature and pressure sensing base.

[0011] Optionally, the isolation member includes a protective shell that is detachably disposed on the temperature and pressure sensing base, the protective shell is made of a material that is easy to conduct heat, the protective shell is filled with thermal grease, the thermal grease surrounds the thermistor, and the thermal grease is used to conduct heat on the protective shell to the thermistor, and a medium separation sealing ring is arranged between the protective shell and the temperature and pressure sensing base.

[0012] By adopting the above technical solution, the heat in the medium is transferred to the thermal grease through the protective shell, and the thermal grease transfers the heat to the thermistor. Due to the sealing effect of the medium separation sealing ring, the possibility of direct contact between the medium and the thermistor is reduced. At the same time, the thermal grease has an insulating and anti-corrosion effect on the thermistor, further reducing the possibility of contact between the medium and the thermistor and improving the sensor's response speed to temperature.

[0013] Optionally, a limiting plane is provided on the protective shell, a limiting block is provided on the temperature and pressure sensing base, and the limiting block is in contact with the limiting plane.

[0014] By adopting the above technical solution, the limit block limits the rotation of the protective shell, thereby reducing the possibility that the lead wire of the thermistor is twisted off due to the rotation of the protective shell.

[0015] Optionally, the pressure sensing module is provided with a pressure signal transmission spring located between the pressure sensing module and the electrical connector, a pressure sealing ring is provided between the temperature and pressure sensing base and the pressure sensing module, a through hole groove is opened on the temperature and pressure sensing base, one end of the through hole groove extends to the top of the temperature and pressure sensing base and the pressure cavity formed by the pressure sensing module and the pressure sealing ring, and the other end extends to the bottom of the temperature and pressure sensing base and is located between the medium sealing ring and the medium separation sealing ring, and the outer shell is provided with a liquid inlet groove connected to the through hole groove.

[0016] By adopting the above technical solution, when the system measures the pressure of the medium, the medium flows into the interior of the shell through the liquid inlet groove on the shell, and flows to the pressure sensing module through the through-hole groove. Then the pressure sensing module transmits the pressure signal of the medium to the electrical connector through the pressure signal transmission spring. The pressure sealing ring reduces the possibility of direct contact between the medium and the pressure signal transmission spring, which is beneficial to the working stability of the pressure sensing module.

[0017] Optionally, a positioning block is provided on the temperature and pressure sensing base, and a positioning groove for the positioning block to be plugged into and engaged with is provided on the electrical connector.

[0018] By adopting the above technical solution, it is convenient for workers to assemble and is helpful to reduce the possibility of worker errors.

[0019] Optionally, a cavity is formed between the electrical connector and the temperature and pressure sensing base, the pressure sensing module is located in the cavity, and the environmental sealing ring is located at the junction between the electrical connector and the temperature and pressure sensing base.

[0020] By adopting the above technical solution, it is helpful to improve the sealing effect between the electrical connector and the temperature and pressure sensing base, and it is helpful to improve the utilization rate of the environmental sealing ring.

[0021] Optionally, the housing is riveted to the electrical connector.

[0022] By adopting the above technical solution, when the shell is riveted on the electrical connector, the electrical connector will squeeze the environmental sealing ring onto the temperature and pressure sensing base, which is beneficial to improving the sealing effect between the shell and the electrical connector.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The environmental seal ring and the medium seal ring reduce the possibility of the medium contacting the temperature signal transmission spring, ensuring the reliability of the temperature and pressure sensing base conducting the signal. The isolation piece transfers the heat in the medium to the thermistor, which not only achieves the purpose of measuring the medium temperature, but also reduces the possibility of the thermistor directly contacting the medium and causing short circuit and corrosion, and at the same time measures the pressure value of the medium;

[0025] 2. The heat in the medium is transferred to the thermal grease through the protective shell, and the thermal grease transfers the heat to the thermistor. Due to the sealing effect of the medium separation seal ring, the possibility of direct contact between the medium and the thermistor is reduced. At the same time, the thermal grease has an insulating and anti-corrosion effect on the thermistor, further reducing the possibility of contact between the medium and the thermistor and improving the sensor's response speed to temperature;

[0026] 3. When the system measures the pressure of the medium, the medium flows into the interior of the shell through the liquid inlet groove on the shell, and flows to the pressure sensing module through the through-hole groove. Then the pressure sensing module transmits the pressure signal of the medium to the electrical connector through the pressure signal transmission spring. The pressure sealing ring reduces the possibility of direct contact between the medium and the pressure signal transmission spring, which is beneficial to the stability of the pressure sensing module. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application.

[0028] Figure 2 It is a structural schematic diagram of the positional relationship between the temperature and pressure sensing base, the temperature signal transmission spring and the welding groove in the embodiment of the present application.

[0029] Figure 3 It is a cross-sectional view showing the positional relationship among the electrical connector, the protective shell and the temperature and pressure sensing base in the embodiment of the present application.

[0030] Figure 4 It is a cross-sectional view of the positional relationship among the through hole groove, the protective shell and the positioning block in the embodiment of the present application.

[0031] Explanation of the accompanying drawings: 01, thermistor; 1, electrical connector; 2, housing; 3, installation chamber; 4, environmental sealing ring; 5, temperature component; 51, temperature and pressure sensing base; 52, temperature signal transmission spring; 53, medium sealing ring; 54, isolating piece; 541, protective shell; 542, thermal grease; 543, medium separation sealing ring; 6, pressure sensing module; 7, welding groove; 8, NTC connecting terminal; 9, limiting plane; 10, limiting block; 11, pressure signal transmission spring; 12, pressure sealing ring; 13, through hole groove; 14, pressure chamber; 15, liquid inlet groove; 16, positioning block; 17, positioning groove; 18, cavity; 19, installation hole. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-4 This application is described in further detail.

[0033] The embodiment of the present application discloses a temperature and pressure sensor.

[0034] Reference Figure 1 A temperature and pressure sensor includes an electrical connector 1, a shell 2 is provided on the bottom of the electrical connector 1, the shell 2 is riveted on the electrical connector 1, the shell 2 and the electrical connector 1 form an installation chamber 3, and an environmental sealing ring 4 is arranged between the shell 2 and the electrical connector 1.

[0035] This is beneficial to forming a sealed space inside the housing 2 and improving the sealing effect of the sensor.

[0036] Reference Figure 2 , Figure 3 and Figure 4 A temperature component 5 for measuring temperature is arranged in the installation chamber 3. The temperature component 5 includes a temperature and pressure sensing base 51 located at the bottom of the electrical connector 1. The temperature and pressure sensing base 51 is made of plastic material. A positioning block 16 is welded on the top of the temperature and pressure sensing base 51. A positioning groove 17 for the positioning block 16 to be plugged in and matched with the bottom of the electrical connector 1 is provided. A temperature signal transmission spring 52 is arranged between the temperature and pressure sensing base 51 and the electrical connector 1.

[0037] Reference Figure 2 , Figure 3 and Figure 4 A medium sealing ring 53 is arranged below the temperature signal transmission spring 52 and between the temperature and pressure sensing base 51 and the housing 2. A welding groove 7 is opened on the temperature and pressure sensing base 51. Two NTC connecting terminals 8 are bonded in the welding groove 7. Wires connected to the NTC connecting terminals 8 are arranged in the temperature and pressure sensing base 51 (not shown in the figure). The two leads of the thermistor 01 are spot welded to the two NTC connecting terminals 8 respectively.

[0038] Reference Figure 2 , Figure 3 and Figure 4 The sensing end of the thermistor 01 extends outside the housing 2, and a mounting hole 19 for plugging two leads of the thermistor 01 is provided on the temperature and pressure sensing base 51. The mounting hole 19 is communicated with the welding groove 7, and the diameter of the mounting hole 19 gradually decreases along the insertion direction of the leads of the thermistor 01.

[0039] The thermistor 01 is conveniently installed on the temperature and pressure sensing base 51, which improves the convenience of installation for workers.

[0040] Reference Figure 2 , Figure 3 and Figure 4 The temperature and pressure sensing base 51 is detachably connected with an isolation piece 54 for isolating the medium from the thermistor 01. The isolation piece 54 includes a protective shell 541 detachably arranged at the bottom of the temperature and pressure sensing base 51. A limiting plane 9 is vertically opened on the protective shell 541. A limiting block 10 is welded on the temperature and pressure sensing base 51, and the limiting block 10 is in contact with the limiting plane 9.

[0041] The possibility of the lead wire of thermistor 01 being twisted off due to the rotation of the protective shell 541 is reduced.

[0042] Reference Figure 2 , Figure 3 and Figure 4The protective shell 541 is made of heat-conducting materials such as stainless steel. The protective shell 541 is filled with thermal grease 542 that is easy to conduct heat and insulate. The thermal grease 542 surrounds the thermistor 01. The thermal grease 542 is used to transfer the heat on the protective shell 541 to the thermistor 01. A medium separation sealing ring 543 is arranged between the protective shell 541 and the temperature and pressure sensing base 51.

[0043] Reference Figure 2 , Figure 3 and Figure 4 A cavity 18 is formed between the temperature and pressure sensing base 51 and the electrical connector 1, and the pressure sensing module 6 is located in the cavity 18. The environmental sealing ring 4 is located at the junction between the electrical connector 1 and the temperature and pressure sensing base 51. A pressure signal transmission spring 11 is arranged between the pressure sensing module 6 and the electrical connector 1, and a pressure sealing ring 12 is arranged between the temperature and pressure sensing base 51 and the pressure sensing module 6.

[0044] Reference Figure 2 , Figure 3 and Figure 4 An L-shaped through hole groove 13 is opened on the temperature and pressure sensing base 51, one end of the through hole groove 13 extends to the top of the temperature and pressure sensing base 51 and the pressure chamber 14 formed by the pressure sensing module 6 and the pressure sealing ring 12, and the other end extends to the bottom of the temperature and pressure sensing base 51 and is located between the medium sealing ring 53 and the medium separation sealing ring 543. A liquid inlet groove 15 connected to the through hole groove 13 is opened on the shell 2.

[0045] When the worker measures the medium, the temperature in the medium is transferred to the thermal grease 542 through the protective shell 541. The thermal grease 542 heats up and transfers the heat to the thermistor 01. The thermistor 01 transfers the signal to the temperature and pressure sensing base 51 through the NTC connection terminal 8. The temperature and pressure sensing base 51 transfers the signal to the electrical connector 1 through the temperature signal transmission spring 52, which reduces the possibility of direct contact between the medium and the thermistor 01 and ensures the reliability of the temperature and pressure sensing base 51 in conducting the signal.

[0046] The medium flows into the interior of the housing 2 through the liquid inlet groove 15 on the housing 2, and flows to the pressure sensing module 6 through the through-hole groove 13. The pressure sensing module 6 transmits the pressure signal of the medium to the electrical connector 1 through the pressure signal transmission spring 11, which not only realizes the detection of the medium, but also reduces the direct contact with the medium, improves the accuracy of the sensor transmitting signal, and is beneficial to prolonging the service life of the sensor.

[0047] The implementation principle of a temperature and pressure sensor in the embodiment of the present application is as follows: when a worker measures a medium, the temperature in the medium is transferred to the thermal grease 542 through the protective shell 541, the thermal grease 542 heats up to transfer heat to the thermistor 01, the thermistor 01 transmits the signal to the temperature and pressure sensing base 51 through the NTC connection terminal 8, and the temperature and pressure sensing base 51 transmits the signal to the electrical connector 1 through the temperature signal transmission spring 52, thereby reducing the possibility of direct contact between the medium and the thermistor 01 and ensuring the reliability of the temperature and pressure sensing base 51 in conducting the signal;

[0048] The medium flows into the interior of the housing 2 through the liquid inlet groove 15 on the housing 2, and flows to the pressure sensing module 6 through the through-hole groove 13. The pressure sensing module 6 transmits the pressure signal of the medium to the electrical connector 1 through the pressure signal transmission spring 11, which not only realizes the detection of the medium, but also reduces the direct contact with the medium, improves the accuracy of the sensor transmitting signal, and is beneficial to prolonging the service life of the sensor.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A temperature and pressure sensor, comprising an electrical connector (1), wherein a housing (2) is provided on the electrical connector (1), wherein: The housing (2) and the electrical connector (1) form an installation chamber (3), an environmental sealing ring (4) is provided between the housing (2) and the electrical connector (1), a temperature component (5) for measuring temperature is provided in the installation chamber (3), the temperature component (5) comprises a temperature and pressure sensing base (51), a temperature signal transmission spring (52) is provided between the temperature and pressure sensing base (51) and the electrical connector (1), and a temperature signal transmission spring (52) is provided below the temperature and pressure sensing base (51). ) and the housing (2), a medium sealing ring (53) is arranged between the temperature and pressure sensing base (51), a thermistor (01) is arranged on the temperature and pressure sensing base (51), and the sensing end of the thermistor (01) extends outside the housing (2), an isolating member (54) for isolating the medium from the thermistor (01) is detachably connected to the temperature and pressure sensing base (51), and the isolating member (54) is easy to conduct heat, and a pressure sensing module (6) for measuring pressure is arranged between the temperature and pressure sensing base (51) and the electrical connector (1).

2. A temperature and pressure sensor according to claim 1, characterized in that: The temperature and pressure sensing base (51) is provided with a welding groove (7), two NTC connection terminals (8) are arranged in the welding groove (7), and two lead wires of the thermistor (01) are respectively arranged on the two NTC connection terminals (8).

3. A temperature and pressure sensor according to claim 1, characterized in that: The isolating member (54) comprises a protective shell (541) which is detachably arranged on the temperature and pressure sensing base (51); the protective shell (541) is made of a material that is easy to conduct heat; the protective shell (541) is filled with thermal grease (542); the thermal grease (542) surrounds the thermistor (01); the thermal grease (542) is used to conduct heat on the protective shell (541) to the thermistor (01); and a medium separation sealing ring (543) is arranged between the protective shell (541) and the temperature and pressure sensing base (51).

4. A temperature and pressure sensor according to claim 3, characterized in that: A limiting plane (9) is provided on the protective shell (541), a limiting block (10) is provided on the temperature and pressure sensing base (51), and the limiting block (10) is in contact with the limiting plane (9).

5. A temperature and pressure sensor according to claim 3, characterized in that: The pressure sensing module (6) is provided with a pressure signal transmission spring (11) located between the pressure sensing module (6) and the electrical connector (1); a pressure sealing ring (12) is provided between the temperature and pressure sensing base (51) and the pressure sensing module (6); a through hole groove (13) is opened on the temperature and pressure sensing base (51); one end of the through hole groove (13) extends to the top of the temperature and pressure sensing base (51) and into the pressure chamber (14) formed by the pressure sensing module (6) and the pressure sealing ring (12); the other end extends to the bottom of the temperature and pressure sensing base (51) and is located between the medium sealing ring (53) and the medium separation sealing ring (543); and a liquid inlet groove (15) is opened on the housing (2) and is communicated with the through hole groove (13).

6. A temperature and pressure sensor according to claim 1, characterized in that: The temperature and pressure sensing base (51) is provided with a positioning block (16), and the electrical connector (1) is provided with a positioning groove (17) for the positioning block (16) to be plugged in and matched with.

7. A temperature and pressure sensor according to claim 5, characterized in that: A cavity (18) is formed between the electrical connector (1) and the temperature and pressure sensing base (51), the pressure sensing module (6) is located in the cavity (18), and the environmental sealing ring (4) is located at the junction between the electrical connector (1) and the temperature and pressure sensing base (51).

8. A temperature and pressure sensor according to claim 1, characterized in that: The housing (2) is riveted onto the electrical connector (1).

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