Integrated temperature and pressure sensor

Abstract

The utility model discloses an integrated temperature and pressure sensor, which relates to the field of sensors and comprises a connector assembly, a pressure core body control assembly, a base, a temperature test control assembly and a connecting shell. The base is provided with an inner cavity, the pressure core body control assembly is installed in the inner cavity of the base, and the connector assembly is arranged above the inner cavity and connected with the base through a buckle. The connecting shell is provided with an accommodating cavity, and the end part of the connector assembly and the base are embedded into the accommodating cavity and are fixed with the connector assembly in a riveting manner; a detection cylinder extending downwards and a single fluid channel are arranged at the bottom of the containing cavity, the temperature test control assembly is arranged in the detection cylinder, and the single fluid channel is connected with the external space and the pressure core body control assembly. According to the scheme, the machining cost is reduced on the basis that pressure measurement is achieved through the single fluid channel, the NTC is arranged at the bottom of the connecting shell, the PCBA is protected in an inner cavity, scattered parts are assembled into an integral assembly form, and follow-up assembly in a metal shell is facilitated.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of sensors, and in particular to an integrated temperature and pressure sensor. Background Art

[0002] A temperature and pressure sensor is a device used to measure temperature and pressure simultaneously. Its principle involves two aspects: temperature measurement and pressure measurement. Temperature sensors usually use technologies such as thermistors, thermistors, thermocouples or infrared temperature measurement to measure temperature. Pressure sensors can use a variety of principles to measure pressure, such as strain gauges, piezoelectric effects, capacitive sensors or vibration sensors. Temperature and pressure sensors usually combine the results of temperature and pressure measurements to provide data that measures two parameters simultaneously. These sensors are very useful in many applications, such as the automotive industry, industrial automation, medical equipment, meteorological measurements, etc.

[0003] In related technologies, due to the limitations of application scenarios, different sensors need to be packaged or assembled into detectors according to requirements, and the structure needs to be optimized in different scenarios. However, the existing temperature and pressure sensors have a complex structure and volume, and are contained in tubular elements with closed ends. The assembly process is complex and the production cost is high. Utility Model Content

[0004] The embodiment of the present application provides an integrated temperature and pressure sensor, which solves the problem of complex assembly and high cost of the temperature and pressure sensor. The integrated temperature and pressure sensor includes a connector component, a pressure core control component, a base, a temperature test control component and a connection shell;

[0005] The base is provided with an inner cavity, the pressure core control assembly is installed in the inner cavity of the base, the connector assembly is arranged on the inner cavity and connected to the base by a snap-fit, and the pressure core control assembly is pressed into the closed inner cavity space;

[0006] The connecting shell is provided with an accommodating cavity, and the end and the base of the connector assembly are embedded in the accommodating cavity and fixed to the connector assembly by riveting; a downwardly extending detection cylinder and a single fluid channel are provided at the bottom of the accommodating cavity, and the temperature test control assembly is placed in the detection cylinder. The single fluid channel connects the external space and the pressure core control assembly, and the fluid pressure is detected through the pressure core control assembly.

[0007] Specifically, the pressure core control assembly includes a circular ceramic pressure core and a control PCBA, and the control PCBA is installed above the ceramic pressure.

[0008] Specifically, a guide groove is provided on the side of the ceramic pressure core.

[0009] Specifically, a drainage port and a downwardly protruding positioning groove are further provided at the bottom of the base, and the drainage port obliquely penetrates the base and is correspondingly connected to the single fluid channel in the accommodating cavity.

[0010] Specifically, a first sealing ring is provided between the pressure core control assembly and the base, and a second sealing ring is provided at the connection between the drainage port and the single fluid channel.

[0011] Specifically, the positioning groove includes a horizontal section and a vertical section, the horizontal section is located on the bottom wall of the base, and the vertical section is located on the side wall of the base.

[0012] Specifically, the temperature test control assembly includes an NTC probe, an NTC wire, a Teflon sleeve, a temperature-resistant heat shrink sleeve and a PCB soft board;

[0013] The NTC probe is located at one end of the Teflon sleeve, an NTC wire connected to the NTC probe is inserted into the Teflon sleeve, and another NTC wire is located outside the Teflon sleeve; the Teflon sleeve and the NTC wire outside the Teflon sleeve are sheathed in a temperature-resistant heat shrink sleeve;

[0014] The parts of the two NTC wires that leak out of the temperature-resistant heat shrink tubing are soldered to the PCB soft board.

[0015] Specifically, the PCB soft board is passed through the horizontal section and the vertical section of the positioning groove to the top of the base, and is connected to the control PCBA from the side wall inward.

[0016] Specifically, a guide groove is provided on the base, and a latch tongue is provided on the guide groove; and a buckle matching the size of the guide groove and the latch tongue is provided on the connector assembly.

[0017] Specifically, a guide positioning groove is further provided on the side wall of the base, and the guide positioning groove is connected to the vertical section of the positioning groove.

[0018] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0019] A single fluid channel is opened on the base and the connecting shell to reduce processing costs;

[0020] The base and the connecting shell are assembled with the temperature NTC and the metal shell through the positioning groove, and the structure is simple and easy to assemble;

[0021] The base positioning groove not only guides the installation of the PCB soft board of the temperature test component, but also fixes and protects the soft board. After the PCB soft board of the temperature test control component passes through the groove on the side of the base, the external structure of the side groove can protect the soft board from being squeezed and damaged when it is assembled into the metal shell.

[0022] The circuit board adopts a split structure, and the two PCBs are connected by welding, which reduces the problems of assembly difficulty and weak strength caused by the excessive length of the PCB soft board;

[0023] The connector assembly and the base have mutually cooperating buckles, which makes the assembly and fixing process simple. This state allows the scattered parts to be assembled into an integral component form, which is convenient for subsequent assembly into the metal shell and prevents misalignment between parts during riveting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a structural diagram of an integrated temperature and pressure sensor provided in an embodiment of the present application;

[0025] Figure 2 It is an exploded diagram of an integrated temperature and pressure sensor;

[0026] Figure 3 It is a connection diagram of the base and the connector assembly;

[0027] Figure 4 It is a cross-sectional view of the integrated temperature and pressure sensor;

[0028] Figure 5 It is a schematic diagram of the structure of the pressure core control assembly;

[0029] Figure 6 It is the installation diagram of the temperature test control assembly and the base;

[0030] Figure 7 It is a schematic diagram of the structure of the temperature test control component;

[0031] Figure 8 It is a schematic diagram of connecting the temperature test control component to the control PCBA.

[0032] Figure numerals: 10, connector assembly; 11, buckle; 20, base; 21, inner cavity; 22, drainage port; 23, guide groove; 24, tongue; 25, positioning groove; 30, connecting shell; 31, single fluid channel; 32, detection tube; 40, pressure core control assembly; 41, ceramic pressure core; 42, control PCBA; 50, temperature test control assembly; 51, NTC probe; 52, NTC wire; 53, Teflon sleeve; 54, temperature-resistant heat shrink sleeve; 55, PCB soft board; 60, first sealing ring; 70, second sealing ring; 80, O-ring. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0034] The term "multiple" as used herein refers to two or more than two. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0035] Figure 1 is a structural diagram of an integrated temperature and pressure sensor provided in an embodiment of the present application, Figure 2 It is an exploded schematic diagram of an integrated temperature and pressure sensor; the components of the integrated temperature and pressure sensor are designed to be a circular or quasi-circular structure, including a connector component 10, a pressure core control component 40, a base 20, a temperature test control component 50 and a metal connecting shell 30.

[0036] Figure 3 It is a connection diagram of the base and connector assembly. Figure 4 It is a cross-sectional view of an integrated temperature and pressure sensor, wherein a circular base 20 is provided with an external inner cavity 21, and a pressure core control assembly 40 is installed in the inner cavity 21 of the base 20. A connector assembly 10 is arranged on the inner cavity 21 and connected to the base 20 via a buckle 11, and the pressure core control assembly 40 is pressed into the closed inner cavity 21 space.

[0037] An open accommodating cavity is provided at the upper end of the metal connection housing 30, and the end of the connector assembly 10 and the base 20 are embedded in the accommodating cavity and fixed to the connector assembly 10 by riveting. A downwardly extending detection cylinder 32 and a single fluid channel 31 are provided at the bottom of the accommodating cavity, and the temperature test control assembly 50 is placed in the detection cylinder 32. The single fluid channel 31 connects the external space and the pressure core control assembly 40. The fluid contacts the pressure core control assembly 40 through the channel, and the fluid pressure is detected by the pressure core control assembly 40.

[0038] Figure 5 It is a structural schematic diagram of the pressure core control component. The pressure core control component 40 includes a circular ceramic pressure core 41 and a control PCBA 42. The control PCBA 42 is welded and installed above the ceramic pressure. The control PCBA 42 contains circuit components such as a pressure chip. A guide groove is opened on the side of the ceramic pressure core 41, and the guide groove can be easily assembled. In addition, a protrusion can be set on the inner wall of the inner cavity 21 for alignment installation and fixation.

[0039] like Figure 6As shown, a drainage port 22 and a downwardly protruding positioning groove 25 are also provided at the bottom of the base 20. The drainage port 22 obliquely penetrates the base 20 and is correspondingly connected to the single fluid channel 31 in the accommodating cavity. A first sealing ring 60 is provided between the pressure core control component 40 and the base 20, and a second sealing ring 70 is provided at the connection between the drainage port 22 and the single fluid channel 31 to provide sealing between the components. In addition, an O-ring 80 is also provided on the outside of the metal connection shell 30. The O-ring 80 is sleeved on the lower protruding part of the bottom of the connection shell 30 to provide sealing when it is installed and connected with other components.

[0040] In some embodiments, the positioning groove 25 is designed to include a horizontal section and a vertical section, the horizontal section is located at the bottom wall of the base 20, and the vertical section is located at the side wall of the base 20. The horizontal section and the vertical section can be completely located inside the base 20 to form a cavity space, or exposed to the outside in the form of a channel.

[0041] Figure 7 3 is a schematic diagram of the structure of a temperature test control component. The temperature test control component 50 includes an NTC probe 51, an NTC wire 52, a Teflon sleeve 53, a temperature-resistant heat shrink sleeve 54 and a PCB soft board 55.

[0042] The NTC probe 51 is located at one end of the Teflon sleeve 53, an NTC wire 52 connected to the NTC probe 51 is inserted into the Teflon sleeve 53, and the other NTC wire 52 is located outside the Teflon sleeve 53. The Teflon sleeve 53 and the NTC wire 52 located outside the Teflon sleeve 53 are sleeved in a temperature-resistant heat shrink sleeve 54. The parts of the two NTC wires 52 that leak out of the temperature-resistant heat shrink sleeve 54 are welded on the PCB soft board 55. In specific operation, first put the Teflon sleeve 53 on one of the NTC connection wires, then put on the temperature-resistant heat shrink sleeve 54, weld the leaking parts of the two NTC connection wires on the PCB soft board 55, and then use high-temperature equipment to shrink the heat shrink sleeve until it completely wraps the NTC wire 52 and the welding point with the PCB, so that the NTC and the soft board PCB become an integral part, and the part wrapped with the thermoplastic sleeve is not easy to deform during assembly, and it is easier to assemble into a metal shell with heat-conducting glue. Such a structure is convenient for production and also ensures the accuracy of the assembly position. The PCB soft board 55 is passed through the horizontal and vertical sections of the positioning groove 25 to the top of the base 20, and is connected to the control PCBA42 from the side wall to achieve data sampling.

[0043] Figure 8It is a schematic diagram of connecting the temperature test control component to the control PCBA. In order to facilitate assembly, a guide groove 23 can be provided on the base 20, a tongue 24 can be provided on the guide groove 23, and a buckle 11 matching the size of the guide groove 23 and the tongue 24 can be provided on the connector assembly 10. A guide positioning groove 25 is also provided on the side wall of the base 20, and the guide positioning groove 25 is connected to the vertical section of the positioning groove 25, which makes it easier to connect the PCB soft board 55 to the control PCBA42 and is also easier to organize.

[0044] The assembly steps based on the above component structure are as follows:

[0045] Solder the PCBA of the pressure core control assembly 40 to the PIN pins in the connector component;

[0046] The temperature test assembly is passed through the positioning groove 25 on the base 20 and then welded to the control PCBA 42 of the pressure core assembly;

[0047] Install the first sealing ring into the base 20, and then install the pressure core control assembly 40;

[0048] Assemble and fix the connector component and the base 20 through the side buckle 11;

[0049] Add a proper amount of thermal conductive glue into the detection tube 32 connected to the housing 30;

[0050] Place the second sealing ring 70 into the accommodating cavity in the connecting housing 30;

[0051] The whole structure assembled in the first to fourth steps is placed into the metal shell, and the NTC probe 51 of the temperature test control assembly 50 is placed inside the detection cylinder 32 of the metal shell, and the raised step at the bottom of the base 20 is placed in the positioning groove 25 of the metal shell;

[0052] Riveting the upper edge of the metal shell so that the metal shell wraps around the riveted surface of the connector;

[0053] The external O-ring 80 is assembled into the external thread groove of the metal housing.

[0054] In summary, the beneficial effects brought by this application include the following:

[0055] A single fluid channel 31 is provided on the base 20 and the connecting housing 30 to reduce processing costs;

[0056] The base 20 and the connecting shell 30 are assembled with the temperature NTC and the metal shell through the positioning groove 25, and the assembly structure is simple and convenient;

[0057] The positioning groove 25 of the base 20 not only guides the installation of the PCB soft board 55 of the temperature test component, but also fixes and protects the soft board; after the PCB soft board 55 of the temperature test control component 50 passes through the groove on the side of the base 20, the external structure of the side groove can protect the soft board from being squeezed and damaged when it is assembled into the metal shell;

[0058] The circuit board part adopts a split structure, and the two PCBs are connected by welding, which reduces the problems of assembly difficulty and weak strength caused by the excessive length of the PCB soft board 55;

[0059] The connector assembly 10 and the base 20 have mutually fitting buckles 11, which makes the assembly and fixing process simple. This state allows the scattered parts to be assembled into an integral component form, which is convenient for subsequent assembly into the metal shell and prevents misalignment between the parts during riveting.

[0060] The preferred embodiments of the present invention are described above; it should be understood that the present invention is not limited to the above-mentioned specific implementation modes, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can make many possible changes and modifications without departing from the technical solution of the present invention, or modify them into equivalent embodiments with equivalent changes, which does not affect the essential content of the present invention; therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. Integrated temperature and pressure sensor, It is characterized in that It comprises a connector assembly (10), a pressure core control assembly (40), a base (20), a temperature test control assembly (50) and a connection housing (30); The base (20) is provided with an inner cavity (21), the pressure core control assembly (40) is installed in the inner cavity (21) of the base (20), the connector assembly (10) is arranged on the inner cavity (21), and is connected to the base (20) via a buckle (11), so that the pressure core control assembly (40) is pressed into the closed inner cavity (21) space; The connecting shell (30) is provided with a receiving cavity, and the end of the connector component (10) and the base (20) are embedded in the receiving cavity and fixed to the connector component (10) by riveting; a downwardly extending detection cylinder (32) and a single fluid channel (31) are provided at the bottom of the receiving cavity, and the temperature test control component (50) is placed in the detection cylinder (32); the single fluid channel (31) connects the external space and the pressure core control component (40), and the fluid pressure is detected through the pressure core control component (40).

2. The integrated temperature and pressure sensor according to claim 1, It is characterized in that The pressure core control assembly (40) comprises a circular ceramic pressure core (41) and a control PCBA (42), wherein the control PCBA (42) is installed above the ceramic pressure.

3. The integrated temperature and pressure sensor according to claim 2, It is characterized in that A guide groove is provided on the side of the ceramic pressure core (41).

4. The integrated temperature and pressure sensor according to claim 3, It is characterized in that The bottom of the base (20) is also provided with a drainage port (22) and a downwardly protruding positioning groove (25); the drainage port (22) obliquely penetrates the base (20) and is correspondingly connected to the single fluid channel (31) in the accommodating cavity.

5. The integrated temperature and pressure sensor according to claim 3, It is characterized in that A first sealing ring (60) is arranged between the pressure core control component (40) and the base (20), and a second sealing ring (70) is arranged at the connection between the drainage port (22) and the single fluid channel (31).

6. The integrated temperature and pressure sensor according to claim 4, It is characterized in that The positioning groove (25) comprises a horizontal section and a vertical section, the horizontal section is located on the bottom wall of the base (20), and the vertical section is located on the side wall of the base (20).

7. The integrated temperature and pressure sensor according to claim 6, It is characterized in that The temperature test control component (50) comprises an NTC probe (51), an NTC wire (52), a Teflon sleeve (53), a temperature-resistant heat shrink sleeve (54) and a PCB soft board (55); The NTC probe (51) is located at one end of the Teflon sleeve (53); an NTC wire (52) connected to the NTC probe (51) is inserted into the Teflon sleeve (53); another NTC wire (52) is located outside the Teflon sleeve (53); the Teflon sleeve (53) and the NTC wire (52) located outside the Teflon sleeve (53) are sheathed in a temperature-resistant heat shrink sleeve (54); The parts of the two NTC wires (52) that leak out of the temperature-resistant heat shrink tubing (54) are welded on the PCB soft board (55).

8. The integrated temperature and pressure sensor according to claim 7, It is characterized in that The PCB soft board (55) is passed through the horizontal section and the vertical section of the positioning groove (25) to the top of the base (20), and is connected to the control PCBA (42) from the side wall inward.

9. The integrated temperature and pressure sensor according to claim 1, It is characterized in that A guide groove (23) is provided on the base (20), and a latch tongue (24) is provided on the guide groove (23); and a buckle (11) matching the size of the guide groove (23) and matching the latch tongue (24) is provided on the connector assembly (10).

10. The integrated temperature and pressure sensor according to claim 6, It is characterized in that A guide positioning groove (25) is also provided on the side wall of the base (20), and the guide positioning groove (25) is connected to the vertical section of the positioning groove (25).

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