Temperature and pressure detection device

Abstract

The utility model relates to a temperature and pressure detection device, including the shell, temperature detection subassembly, pressure detection subassembly and electric connector, the shell has the detection end, in the shell is provided with the pressure detection cavity, temperature detection subassembly is provided on the shell, pressure detection subassembly is provided in the pressure detection cavity, the electric connector is provided with the pressure detection cavity. The temperature detection assembly is provided with a detection end, the detection end is provided with a pressure leading port, a first flow path section is formed in the shell, the pressure detection cavity is communicated with the pressure leading port through the first flow path section, and the temperature detection assembly and the pressure detection assembly are both electrically connected with the electric connector. The temperature and pressure detection device provided by the utility model solves the problem that an existing temperature and pressure sensor occupies too large space.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a temperature and pressure detection device. Background Art

[0002] Pressure sensors and temperature sensors are two of the most commonly used sensors in automotive and industrial applications. In actual use, it is often necessary to measure both temperature and pressure simultaneously. As two different types of physical quantities, when considering the measurement accuracy of their respective working principles, the sensitive elements of the two must work independently and without affecting each other. However, when installing temperature sensors and pressure sensors at the detection site respectively for independent temperature and pressure detection, the occupied space of the sensors is too large. Summary of the Invention

[0003] The main object of the utility model is to provide a temperature and pressure detection device, aiming to solve the problem that the existing temperature and pressure sensors occupy too much space.

[0004] To achieve the above object, a temperature and pressure detection device provided by the utility model includes a housing, a temperature detection component, a pressure detection component and an electrical connector. The housing has a detection end, and a pressure detection cavity is formed inside the housing. The temperature detection component is arranged on the housing, the pressure detection component is arranged in the pressure detection cavity, a pressure guiding port is arranged at the detection end, a first flow path section is formed inside the housing, and the pressure detection cavity is communicated with the pressure guiding port through the first flow path section. Both the temperature detection component and the pressure detection component are electrically connected to the electrical connector.

[0005] According to some embodiments of the utility model, a temperature detection cavity is further formed inside the housing. The temperature detection cavity and the pressure detection cavity are arranged at intervals. The temperature detection cavity is filled with heat-conducting glue. The temperature detection component includes a temperature detection element, and the temperature detection element is fixed in the temperature detection cavity by potting with the heat-conducting glue.

[0006] According to some embodiments of the utility model, a detection part protrudes from the detection end of the housing, and the temperature detection cavity extends from the housing to the detection part for the temperature sensing head of the temperature detection element to extend into the detection part.

[0007] According to some embodiments of the utility model, a first hole extending along the axial direction of the housing is formed on the housing. The first hole extends from the housing to the end of the detection part far away from the housing, and part of the temperature detection cavity is formed on the first hole.

[0008] According to some embodiments of the present utility model, the housing further has a connection end, the connection end and the detection end are oppositely arranged in the axial direction of the housing, an installation groove is formed in the connection end of the housing, the electrical connector is connected to the notch of the installation groove, the temperature and pressure detection device further includes a circuit board, the circuit board is arranged in the installation groove, and both the temperature detection component and the pressure detection component are electrically connected to the electrical connector through the circuit board.

[0009] According to some embodiments of the present utility model, a clamping groove for accommodating the circuit board is formed at the bottom of the installation groove, the clamping groove has a clamping wall that abuts and clamps against the circumferential side of the circuit board, and the depth of the clamping groove is consistent with the thickness of the circuit board.

[0010] According to some embodiments of the present utility model, the circuit board is provided with single-sided copper plating, and the copper-plated surface of the circuit board faces the electrical connector. The circuit board has a first hollow area and a second hollow area. The first hollow area corresponds to the temperature detection component and is used for the wires of the temperature detection component to pass through the first hollow area and be connected to the copper-plated surface. The second hollow area corresponds to the pressure detection component and is used for the wires of the pressure detection component to pass through the second hollow area and be connected to the copper-plated surface.

[0011] According to some embodiments of the present utility model, a bracket is arranged outside the second hollow area, the bracket extends along the circumference of the second hollow area, the connection contact point between the wire of the pressure detection component and the copper-plated surface is within the surrounding area of the bracket, and the surrounding area of the bracket is filled with protective glue.

[0012] According to some embodiments of the present utility model, the pressure detection component includes an installation part and a pressure detection element. The installation part has a pressure guiding end and an installation end for installing the pressure detection element. A second flow path communicating with the first flow path section is formed in the installation part, and the detection area of the pressure detection element communicates with the pressure guiding port through the first flow path section and the second flow path section.

[0013] According to some embodiments of the present utility model, a second hole extending along the axial direction of the housing is formed on the housing, the second hole extends from the pressure guiding end of the installation part to the detection end of the housing to form the first flow path section, and a pressure guiding port is formed at one end of the second hole close to the detection end. A third hole extending along the axial direction of the installation part is formed on the installation part, the third hole extends from the installation end of the installation part to the pressure guiding end to form the second flow path section, and the second hole and the third hole are coaxially arranged.

[0014] The present utility model has at least the following beneficial effects:

[0015] In the present utility model, the housing has a detection end, and a pressure detection chamber is formed inside the housing. The temperature detection component is disposed on the housing, and the pressure detection component is disposed inside the pressure detection chamber. The detection end is provided with a pressure guiding port. A first flow path section is formed inside the housing. The pressure detection chamber is communicated with the pressure guiding port through the first flow path section. Both the temperature detection component and the pressure detection component are electrically connected to the electrical connector. By providing the pressure detection chamber inside the housing to accommodate the pressure detection component, the liquid to be measured can flow in from the pressure guiding port, pass through the first flow path section and enter the pressure detection chamber, and the pressure of the liquid to be measured is measured by the pressure detection component. At the same time, the temperature detection component is separately provided on the housing, so that the temperature and pressure detection functions are integrated on the temperature and pressure detection device. Compared with two independent detection devices in the prior art for separately detecting temperature and pressure, the occupied space is greatly reduced, and the integration degree of the detection device is improved. The temperature and pressure detection device can be installed on an automobile fuel tank. Since both the temperature detection component and the pressure detection component are electrically connected to the electrical connector, the detection end of the housing extends into the fuel tank of the automobile, and the two detection components can send the detected temperature information and oil pressure information of the crude oil in the fuel tank to the main controller of the automobile through the electrical connector. The temperature and pressure detection device provided by the present utility model solves the problem that the existing temperature and pressure sensors occupy too much space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 FIG. is a cross-sectional view of a temperature and pressure detection device provided by an embodiment of the present utility model;

[0018] Figure 2 is Figure 1 an exploded view of the temperature and pressure detection device in;

[0019] Figure 3 is Figure 1 a cross-sectional view of the pressure detection component in;

[0020] Figure 4 is Figure 1 a three-dimensional schematic diagram of the housing in.

[0021] DESCRIPTION OF REFERENCE NUMERALS:

[0022] 100 - Temperature and pressure detection device; 1 - housing; 11 - detection end; 111 - pressure guiding port; 12 - connection end; 13 - pressure detection chamber; 14 - temperature detection chamber; 15 - detection part; 16 - first hole; 17 - installation groove; 171 - engagement groove; 18 - second hole; 2 - temperature detection component; 21 - temperature detection element; 3 - pressure detection component; 31 - installation part; 311 - pressure guiding end; 312 - installation end; 313 - third hole; 32 - pressure detection element; 4 - electrical connector; 5 - circuit board; 51 - first hollow area; 52 - second hollow area; 6 - bracket; 7 - sealing part. Detailed implementation manner

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0025] In addition, if there are descriptions such as "first" and "second" involved in the embodiments of the present invention, the descriptions of "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0026] The present invention provides a temperature and pressure detection device. Figures 1 to 4 This is a specific embodiment of the temperature and pressure detection device provided by the present invention.

[0027] As Figure 1 and Figure 2As shown in the figure, an embodiment of the present utility model provides a temperature and pressure detection device 100, which includes a housing 1, a temperature detection component 2, a pressure detection component 3, and an electrical connector 4. The housing 1 has a detection end 11, and a pressure detection cavity 13 is formed inside the housing 1. The temperature detection component 2 is arranged on the housing 1, the pressure detection component 3 is arranged in the pressure detection cavity 13, a pressure guiding port 111 is provided at the detection end 11, a first flow path section is formed inside the housing, and the pressure detection cavity 13 is communicated with the pressure guiding port 111 through the first flow path section. Both the temperature detection component 2 and the pressure detection component 3 are electrically connected to the electrical connector 4.

[0028] In the present utility model, the housing 1 has a detection end 11, and a pressure detection cavity 13 is formed inside the housing 1. The temperature detection component 2 is arranged on the housing 1, the pressure detection component 3 is arranged in the pressure detection cavity 13, a pressure guiding port 111 is provided at the detection end 11, a first flow path section is formed inside the housing, and the pressure detection cavity 13 is communicated with the pressure guiding port 111 through the first flow path section. Both the temperature detection component 2 and the pressure detection component 3 are electrically connected to the electrical connector 4. By arranging the pressure detection cavity 13 inside the housing 1 to accommodate the pressure detection component 3, the liquid to be measured can flow in from the pressure guiding port 111, flow through the first flow path section and enter the pressure detection cavity 13, and the pressure of the liquid to be measured is measured by the pressure detection component 3. At the same time, the temperature detection component 2 is separately arranged on the housing 1, so that the temperature and pressure detection functions are integrated on the temperature and pressure detection device 100. Compared with two independent detection devices in the prior art for separately detecting temperature and pressure, the occupied space is greatly reduced, and the integration degree of the detection device is improved. The temperature and pressure detection device 100 can be installed on an automobile fuel tank. Since both the temperature detection component 2 and the pressure detection component 3 are electrically connected to the electrical connector 4, the detection end 11 of the housing 1 extends into the fuel tank of the automobile, and the two detection components can send the detected temperature information and oil pressure information of the crude oil in the fuel tank to the main controller of the automobile through the electrical connector 4. The temperature and pressure detection device 100 provided by the present utility model solves the problem that the existing temperature and pressure sensors occupy too much space.

[0029] It should be noted that the connection method between the housing 1 and the automobile fuel tank is not limited, as long as it is ensured that the detection end 11 of the housing 1 extends into the automobile fuel tank. For example, in some embodiments, the housing 1 is threadedly connected to the automobile fuel tank, which can not only ensure a firm connection, but also adjust the distance that the detection end 11 extends into the automobile fuel tank by rotating the housing 1. At the same time, in order to prevent the crude oil in the fuel tank from leaking from the connection part between the housing 1 and the fuel tank, a sealing part 7 is provided in a ring shape at the connection part between the housing 1 and the fuel tank, and the sealing part 7 is made of an elastic material.

[0030] In order to ensure that the temperature detection component 2 and the pressure detection component 3 do not affect each other during measurement and to ensure the detection accuracy, in some embodiments, as Figure 1 shown, the housing 1 further has a temperature detection cavity 14, the temperature detection cavity 14 is arranged at intervals with the pressure detection cavity 13, the temperature detection cavity 14 is filled with a heat-conducting adhesive, and the temperature detection component 2 includes a temperature detection element 21, and the temperature detection element 21 is fixed in the temperature detection cavity 14 by potting with the heat-conducting adhesive. With such a setting, the temperature detection cavity 14 and the pressure detection cavity 13 are arranged at intervals, ensuring that the temperature detection component 2 and the pressure detection component 3 do not affect each other during measurement. At the same time, due to the excellent heat-conducting performance of the heat-conducting adhesive, the temperature change of the measured crude oil can be quickly transmitted to the temperature detection element 21, so as to accurately and quickly measure the temperature of the crude oil.

[0031] It should be noted that the housing 1 is made of a metal material. Due to the excellent heat-conducting performance of the metal, the heat of the crude oil in the automobile fuel tank can be transmitted to the temperature detection cavity 14, making the temperature of the crude oil detected by the temperature detection element 21 more accurate.

[0032] Since the crude oil on the surface layer of the automobile fuel tank may be affected by the heat conduction of the fuel tank shell and cannot truly reflect the temperature of the crude oil, in order to reduce the error of temperature detection, in some embodiments, as Figure 1 shown, a detection portion 15 protrudes from the detection end 11 of the housing 1, and the temperature detection cavity 14 extends from the housing 1 to the detection portion 15 for the temperature sensing head of the temperature detection element 21 to extend into the detection portion 15. With such a setting, the detection portion 15 can extend deeper into the automobile fuel tank. Since the temperature sensing head of the temperature detection element 21 extends into the detection portion 15, the temperature of the middle-layer crude oil in the automobile fuel tank can be detected, improving the detection accuracy. At the same time, the detection portion 15 is eccentrically arranged. Compared with the detection portion 15 protruding from the middle of the detection end 11, the volume of the housing 1 can be further reduced, thereby improving the integration degree of the temperature and pressure detection device 100.

[0033] Furthermore, in some embodiments, as Figure 1 shown, the housing 1 is provided with a first hole 16 extending along its axial direction, the first hole 16 extends from the housing 1 to the end of the detection portion 15 away from the housing 1, and a part of the temperature detection cavity 14 is formed on the first hole 16. With such a setting, the first hole 16 extends along the axial direction of the housing 1. Compared with the inclined extension, not only the processing difficulty is reduced, but also the production cost is lowered.

[0034] Even further, in some embodiments, as Figure 1As shown, the first hole 16 is a blind hole. The detected crude oil and the temperature detection element 21 are isolated by the detection part 15 to protect the temperature detection element 21.

[0035] Preferably, in some embodiments, as Figure 1 shown, the housing 1 further has a connection end 12. The connection end 12 and the detection end 11 are oppositely arranged in the axial direction of the housing 1. An installation groove 17 is formed at the connection end 12 of the housing 1. The electrical connector 4 is connected to the notch of the installation groove 17. The temperature and pressure detection device 100 further includes a circuit board 5. The circuit board 5 is arranged in the installation groove 17. Both the temperature detection component 2 and the pressure detection component 3 are electrically connected to the electrical connector 4 through the circuit board 5. With such an arrangement, the circuit board 5 preliminarily processes the temperature information and oil pressure information of the crude oil detected by the temperature detection component 2 and the pressure detection component 3. On the one hand, the operation efficiency of the circuit is improved. On the other hand, if the temperature detection component 2 and the pressure detection component 3 are directly electrically connected to the electrical connector 4 through wires, the wires may be broken during the assembly process of the electrical connector 4 and the housing 1, and the assembly efficiency is relatively low. By using the circuit board 5 as a transfer, the wires can be prevented from being broken during the assembly process, and the operator can assemble the housing 1 and the electrical connector 4 separately, thereby improving the assembly efficiency.

[0036] Furthermore, in some embodiments, the circuit board 5 and the electrical connector 4 can be electrically connected through a flexible circuit board. Since the flexible circuit board can be bent and is protected by a flexible substrate, it will not be broken during the assembly process of the housing 1 and the electrical connector 4. At the same time, because the flexible circuit board is welded to the contacts on the circuit board 5, it is more convenient and fast than wires and can improve the assembly efficiency.

[0037] There is no limitation on the installation method of the circuit board 5 in the installation groove 17, as long as it is ensured that the temperature detection component 2 and the pressure detection component 3 are electrically connected to the electrical connector 4 through the circuit board 5. For example, in some embodiments, as Figure 1 shown, a clamping groove 171 for accommodating the circuit board 5 is formed at the bottom of the installation groove 17. The clamping groove 171 has a clamping wall that abuts against and clamps the circumferential side of the circuit board 5. The depth of the clamping groove 171 is the same as the thickness of the circuit board 5. With such an arrangement, the circuit board 5 can be directly clamped and fixed in the clamping groove 171 without being fixed by glue, reducing the assembly cost. And the depth of the clamping groove 171 is the same as the thickness of the circuit board 5, making the circuit board 5 flush with the bottom of the installation groove 17, reducing the volume of the housing 1 and improving the integration of the temperature and pressure detection device 100.

[0038] Further, in some embodiments, such as Figure 1 and Figure 2 shown, the circuit board 5 is provided with single-sided copper plating, and the copper-plated surface of the circuit board 5 faces the electrical connector 4. The circuit board 5 has a first hollowed-out area 51 and a second hollowed-out area 52. The first hollowed-out area 51 corresponds to the temperature detection component 2, for the wires of the temperature detection component 2 to pass through the first hollowed-out area 51 and be connected to the copper-plated surface. The second hollowed-out area 52 corresponds to the pressure detection component 3, for the wires of the pressure detection component 3 to pass through the second hollowed-out area 52 and be connected to the copper-plated surface. With such a setting, the circuit board 5 is provided with single-sided copper plating, which has a lower cost compared to double-sided copper plating. And the copper-plated surface of the circuit board 5 faces the electrical connector 4, improving the assembly connection speed between the circuit board 5 and the electrical connector 4, thus enhancing the assembly efficiency. At the same time, the first hollowed-out area 51 and the second hollowed-out area 52 are provided in the non-contact area of the circuit board 5, which not only facilitates the connection wires to pass through but also reduces the cost.

[0039] Specifically, the wire of the pressure detection component 3 is a bonding wire. When the bonding wire is a gold wire, it is welded to the contact point of the circuit board 5 by gold ball bonding. When the bonding wire is a silicon-aluminum wire, it is welded to the contact point of the circuit board 5 by ultrasonic wedge bonding process. Since the diameter of the bonding wire is extremely thin, in order to avoid the bonding wire from breaking during the assembly process, in some embodiments, such as Figure 1 and Figure 4 shown, a bracket 6 is provided outside the second hollowed-out area 52. The bracket 6 extends along the circumferential direction of the second hollowed-out area 52. The connection contact point between the wire of the pressure detection component 3 and the copper-plated surface is within the enclosed area of the bracket 6, and the enclosed area of the bracket 6 is filled with a protective glue. With such a setting, since the bonding wire is within the enclosed area of the bracket 6 and the enclosed area of the bracket 6 is filled with the protective glue, covering the bonding wire with the protective glue can, on the one hand, improve the connection stability of the bonding wire and, on the other hand, avoid the bonding wire from breaking during the assembly process.

[0040] There is no limitation on the specific structure of the pressure detection component 3, as long as it can ensure that the pressure detection component 3 can detect the pressure of the measured liquid flowing into the pressure detection chamber 13. For example, in some embodiments, such as Figure 1 and Figure 3As shown in the figure, the pressure detection component 3 includes an installation part 31 and a pressure detection element 32. The installation part 31 has a pressure guiding end 311 and an installation end 312 for installing the pressure detection element 32. A second flow path communicating with the first flow path section is formed in the installation part 31. The detection area of the pressure detection element 32 communicates with the pressure guiding port 111 through the first flow path and the second flow path. Specifically, the installation part 31 is an induction steel cup, and the installation end 312 is an elastic diaphragm provided on one side of the induction steel cup. The pressure detection element 32 is a silicon strain gauge or an alloy thin film resistor. When the pressure detection element 32 is a silicon strain gauge, it is melted onto the elastic diaphragm by glass micro-melting technology. When the pressure detection element 32 is an alloy thin film resistor, it is deposited on the elastic diaphragm by ion beam sputtering and etching processes. The measured liquid flows in from the pressure guiding port 111, flows through the first flow path and the second flow path, and reaches the inner side of the elastic diaphragm. The elastic diaphragm directly senses and transmits the pressure to the pressure detection element 32, thereby realizing real-time and accurate measurement of the pressure of the measured liquid. By providing the installation part 31, the measured liquid and the pressure detection element 32 can be isolated, avoiding corrosion of the pressure detection element 32 after long-term contact with the measured liquid.

[0041] Further, in some embodiments, as Figure 1 shown, a second hole 18 extending along the axial direction of the housing 1 is provided on the housing 1. The second hole 18 extends from the pressure guiding end 311 of the installation part 31 to the detection end 11 of the housing 1 to form the first flow path section. An end of the second hole 18 close to the detection end 11 forms the pressure guiding port 111. A third hole 313 extending along the axial direction of the installation part 31 is provided on the installation part 31. The third hole 313 extends from the installation end 312 of the installation part 31 to the pressure guiding end 311 to form the second flow path. The second hole 18 and the third hole 313 are coaxially arranged. With such an arrangement, the opening length inside the housing 1 is reduced, which not only reduces the processing difficulty but also lowers the production cost. At the same time, the second hole 18 and the third hole 313 are coaxially arranged, reducing the influence on the pressure of the measured liquid and improving the detection accuracy.

[0042] In addition, the present invention also provides an assembly method for a temperature and pressure detection device 100. The assembly method includes the following steps:

[0043] S1: Install the pressure detection element 32 on the installation end 312 of the installation part 31;

[0044] S2: Assemble and weld the pressure detection component 3 to the inner wall of the pressure detection cavity 13;

[0045] S3: Insert the temperature sensing head of the temperature detection element 21 into the detection part 15 along the first hole 16, and fix it in the temperature detection cavity 14 by potting with the thermal conductive adhesive;

[0046] S4: Snap and fix the circuit board 5 in the snap groove 171;

[0047] S5: Pass the wire of the temperature detection element 21 through the first hollow area 51 and weld it to the contact on the copper-clad surface of the circuit board 5;

[0048] S6: Pass the bonding wire of the pressure detection element 32 through the second hollow area 52 and weld it to the contact on the copper-clad surface of the circuit board 5;

[0049] S7: Bond the bracket 6 to the outside of the second hollow area 52, and pot the protective adhesive into the bracket 6 so that the protective adhesive covers the pressure detection element 32, the bonding wire and the connection contact;

[0050] S8: Weld the flexible printed circuit board to the contacts of the circuit board 5 and the pins of the electrical connector 4 respectively;

[0051] S9: Fit the sealing part 7 onto the side of the external thread area on the side wall of the housing 1 facing away from the detection end 11 to complete the assembly of the temperature and pressure detection device 100.

[0052] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A temperature and pressure detection device, characterized in that: It includes a shell, a temperature detection component, a pressure detection component and an electrical connector, the shell has a detection end, and the shell has a pressure detection cavity, the temperature detection component is arranged on the shell, the pressure detection component is arranged in the pressure detection cavity, the detection end is provided with a pressure inlet, a first flow path section is formed in the shell, the pressure detection cavity is connected to the pressure inlet through the first flow path section, and the temperature detection component and the pressure detection component are both electrically connected to the electrical connector.

2. The temperature and pressure detection device according to claim 1, characterized in that: The shell also has a temperature detection cavity, which is spaced apart from the pressure detection cavity. The temperature detection cavity is filled with thermal conductive adhesive. The temperature detection component includes a temperature detection element, which is fixed in the temperature detection cavity by encapsulating with the thermal conductive adhesive.

3. The temperature and pressure detection device according to claim 2, characterized in that: A detection portion is convexly provided at the detection end of the shell, and the temperature detection cavity extends from the shell to the detection portion so that the temperature sensing head of the temperature detection element can extend into the detection portion.

4. The temperature and pressure detection device according to claim 3, characterized in that: The housing is provided with a first hole extending along the axial direction thereof, the first hole extending from the housing to an end of the detection portion away from the housing, and part of the temperature detection cavity is formed on the first hole.

5. The temperature and pressure detection device according to claim 1, characterized in that: The shell also has a connecting end, and the connecting end and the detection end are arranged opposite to each other in the axial direction of the shell. The connecting end of the shell is provided with a mounting groove, and the electrical connector is connected to the notch of the mounting groove. The temperature and pressure detection device also includes a circuit board, and the circuit board is arranged in the mounting groove. The temperature detection component and the pressure detection component are both electrically connected to the electrical connector through the circuit board.

6. The temperature and pressure detection device according to claim 5, characterized in that: The bottom of the installation groove is provided with a clamping groove for accommodating the circuit board. The clamping groove has a clamping wall that abuts and clamps with the circumferential side of the circuit board. The groove depth of the clamping groove is consistent with the thickness of the circuit board.

7. The temperature and pressure detection device according to claim 5, characterized in that: The circuit board is copper-clad on one side, and the copper-clad surface of the circuit board faces the electrical connector. The circuit board has a first hollow area and a second hollow area. The first hollow area is arranged corresponding to the temperature detection component so that the wire of the temperature detection component can pass through the first hollow area and be connected to the copper-clad surface. The second hollow area is arranged corresponding to the pressure detection component so that the wire of the pressure detection component can pass through the second hollow area and be connected to the copper-clad surface.

8. The temperature and pressure detection device according to claim 7, characterized in that: A bracket is provided on the outer side of the second hollow area, and the bracket extends along the circumference of the second hollow area. The connecting contacts of the wires of the pressure detection component and the copper-clad surface are located within the enclosed area of ​​the bracket, and the enclosed area of ​​the bracket is filled with protective glue.

9. The temperature and pressure detection device according to claim 1, characterized in that: The pressure detection assembly includes a mounting portion and a pressure detection element, the mounting portion having a pressure-introducing end and a mounting end for installing the pressure detection element, a second flow path section connected to the first flow path section is formed in the mounting portion, and the detection area of ​​the pressure detection element is connected to the pressure-introducing port through the first flow path section and the second flow path section.

10. The temperature and pressure detection device according to claim 9, characterized in that: The shell is provided with a second hole extending along its axial direction, the second hole extends from the pressure-inducing end of the mounting portion to the detection end of the shell to form the first flow path section, and the pressure-inducing port is formed at one end of the second hole close to the detection end, the mounting portion is provided with a third hole extending along its axial direction, the third hole extends from the mounting end of the mounting portion to the pressure-inducing end to form the second flow path section, and the second hole is coaxially arranged with the third hole.

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