Integrated pressure and temperature sensor

Abstract

The utility model relates to an integrated pressure and temperature sensor. The integrated pressure and temperature sensor comprises a shell made of metal; a connector; a pressure detection module; the temperature detection module is packaged in the inner cavity of the sensor and comprises a temperature sensing element, a temperature sensing element carrier for bearing the temperature sensing element and a metal sleeve configured to be used for protecting the temperature sensing element; and an electronic module assembly, wherein the metal sleeve is configured to be connected to the temperature sensing element carrier in a manner of not contacting the housing.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle sensors, and more particularly to an integrated pressure and temperature sensor. Background Art

[0002] In recent years, integrated pressure and temperature sensors have been widely used in the fields of air conditioning systems for motor vehicles, coolant systems for fuel cells, engine lubrication systems, etc. due to their small size, long service life, and high compatibility with control systems.

[0003] However, in existing integrated pressure and temperature sensors, a metal sleeve configured to protect a temperature-sensing element (e.g., a thermistor) is typically connected to a metal housing of the sensor. Excessive heat diffusion between the metal sleeve and the metal housing of the sensor may cause the sensor's response time to decrease, thereby affecting the sensitivity and accuracy of the sensor's temperature measurement. Utility Model Content

[0004] In view of the problems existing in the prior art, the present disclosure provides an integrated pressure and temperature sensor. By connecting a metal sleeve configured to protect a temperature sensing element to a temperature sensing element carrier, the integrated pressure and temperature sensor can reduce the conduction heat dissipation between the metal sleeve and the metal housing of the sensor, thereby avoiding excessive heat diffusion between the two, thereby improving the sensitivity and accuracy of the sensor temperature measurement. In addition, the integrated pressure and temperature sensor according to the present disclosure has a simple structure and can reduce costs.

[0005] According to one aspect of the present disclosure, there is provided an integrated pressure and temperature sensor, the integrated pressure and temperature sensor comprising:

[0006] a housing made of metal, defining a sensor port at a bottom of the housing, the sensor port being configured to receive a fluid;

[0007] A connector, the connector being attached to the top of the housing, the housing, the connector and the sensor port collectively defining an inner cavity of the sensor;

[0008] A pressure detection module, which is encapsulated in the inner cavity and includes a pressure-sensitive element, and is configured to detect the pressure of the fluid and generate a pressure signal;

[0009] a temperature detection module, the temperature detection module being encapsulated in the inner cavity and comprising a temperature sensing element, a temperature sensing element carrier carrying the temperature sensing element, and a metal sleeve configured to protect the temperature sensing element, the temperature detection module being configured to detect the temperature of the fluid and generate a temperature signal; and

[0010] an electronic module assembly encapsulated in the inner cavity, the electronic module assembly being configured to generate a pressure detection electrical signal based on the pressure signal and to generate a temperature detection electrical signal based on the temperature signal,

[0011] The metal sleeve is configured to be connected to the temperature sensing element carrier in a manner that the metal sleeve does not contact the housing.

[0012] In an embodiment of the integrated pressure and temperature sensor, the metal sleeve is connected to the temperature sensing element carrier by riveting.

[0013] In an embodiment of the integrated pressure and temperature sensor, the metal sleeve is connected to the temperature sensing element carrier by heat riveting.

[0014] In an embodiment of the integrated pressure and temperature sensor, the temperature sensing element carrier is made of plastic.

[0015] In one embodiment of the integrated pressure and temperature sensor, the temperature sensing element is a thermistor.

[0016] In one embodiment of the integrated pressure and temperature sensor, the temperature sensing element is a negative temperature coefficient thermistor (NTC).

[0017] In one embodiment of the integrated pressure and temperature sensor, the temperature detection module further comprises a first sealing ring, and the first sealing ring is configured to achieve radial sealing between the metal sleeve and the temperature sensing element carrier.

[0018] In an embodiment of the integrated pressure and temperature sensor, the integrated pressure and temperature sensor further comprises a second sealing ring, wherein the second sealing ring is configured to achieve radial sealing between the pressure sensing element and the temperature sensing element carrier.

[0019] In one embodiment of the integrated pressure and temperature sensor, the integrated pressure and temperature sensor further comprises a third sealing ring, wherein the third sealing ring is configured to achieve radial sealing between the housing and the metal sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Various objects, features and advantages of the present disclosure will become more apparent by considering the following description of the preferred embodiments of the present disclosure in conjunction with the accompanying drawings. The accompanying drawings are merely exemplary illustrations of the present disclosure and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always represent the same or similar parts.

[0021] Figure 1 is an exploded view of an integrated pressure and temperature sensor according to the present disclosure.

[0022] Figure 2A and Figure 2B It is a schematic diagram of a metal sleeve in an integrated pressure and temperature sensor according to the present disclosure being connected to a temperature sensing element carrier by riveting.

[0023] Figure 3A and Figure 3B It is a schematic diagram of a metal sleeve in an integrated pressure and temperature sensor according to the present disclosure being connected to a temperature sensing element carrier by means of heat riveting. DETAILED DESCRIPTION

[0024] The present disclosure will be described below with reference to the accompanying drawings, wherein the accompanying drawings show preferred embodiments of the present disclosure. However, it should be understood that the present disclosure can be presented in a variety of different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and fully illustrate the scope of protection of the present disclosure to those skilled in the art. It should also be understood that the technical features in the embodiments disclosed herein can be combined in various ways to provide more additional embodiments. Those skilled in the art may appropriately modify the detailed configuration without departing from the main purpose of the present disclosure.

[0025] It should be understood that the same reference numerals represent the same elements throughout the drawings. In the drawings, the dimensions of certain features may be distorted for clarity.

[0026] Unless otherwise specified, the terms (including technical and scientific terms) used herein shall have the meanings that are generally understood by those of ordinary skill in the art to which the present disclosure relates. Unless otherwise specified, the terms "including" and "comprising" used in the specification and claims shall be interpreted as open-ended meanings, that is, "including" and "comprising" shall be interpreted as synonymous with the terms "including at least" or "comprising at least".

[0027] Unless otherwise specified, the terms “upper”, “lower”, “top”, “bottom”, etc. used in the present disclosure refer only to the relative positions of the device and its related components in the state as shown in the drawings.

[0028] It should be understood that the terms used in the specification are only used to describe specific embodiments and are not intended to limit the present disclosure. For the sake of brevity and / or clarity, well-known functions or structures may not be described in detail.

[0029] In view of the above-mentioned defects in the prior art, the present disclosure provides an integrated pressure and temperature sensor. Embodiments for implementing the present disclosure will be described below with reference to the accompanying drawings.

[0030] like Figure 1As shown, according to an embodiment of the present disclosure, an integrated pressure and temperature sensor is provided, which includes a connector 1 and a housing 2. The connector 1 is attached to the top of the housing 2 and can be made of plastic. The housing 2 is usually made of metal. A sensor port 3 is defined at the bottom of the housing 2, and the sensor port 3 is configured to receive a fluid. Thus, the connector 1, the housing 2 and the sensor port 3 together define the inner cavity of the sensor.

[0031] In addition, an electronic module assembly (EMA) 4, a temperature detection module and a pressure detection module are encapsulated in the inner cavity of the sensor. The temperature detection module is configured to detect the temperature of the fluid and generate a temperature signal. The pressure detection module includes a pressure sensing element 6 and is configured to detect the pressure of the fluid and generate a pressure signal. The pressure sensing element 6 can be a ceramic pressure sensing element. The electronic module assembly 4 is configured to generate a pressure detection electrical signal based on the pressure signal and to generate a temperature detection electrical signal based on the temperature signal. The pressure detection electrical signal and the temperature detection electrical signal generated by the electronic module assembly 4 can be output to a client host computer (such as an ECU) for subsequent processing.

[0032] like Figure 1 As shown, the temperature detection module includes a temperature sensing element 51, a temperature sensing element carrier 52 carrying the temperature sensing element 51, and a metal sleeve 53 configured to protect the temperature sensing element 51. The temperature sensing element 51 can be a thermistor, such as a negative temperature coefficient thermistor (NTC). The temperature sensing element carrier 52 can be made of plastic.

[0033] In this embodiment, the metal sleeve 53 is configured to be connected to the temperature sensing element carrier 52 in a manner that does not contact the metal housing 2. Since the metal sleeve 53 does not contact the metal housing 2 at all, the conduction heat dissipation between the metal sleeve 53 and the housing 2 can be reduced, thereby avoiding excessive heat diffusion between the two, thereby improving the sensitivity and accuracy of the sensor temperature measurement.

[0034] Specifically, the metal sleeve 53 can be connected to the temperature sensing element carrier 52 by riveting. Figure 2A The figure shows the state where the metal sleeve 53 is sleeved on the temperature sensing element carrier 52 but has not yet been fixed by riveting. Figure 2B FIG. 5 shows the state after the metal sleeve 53 is fixed to the temperature sensing element carrier 52 by riveting. Figure 2A and Figure 2B As shown, the metal sleeve 53 is deformed at a plurality of riveted connection portions P1 along the circumferential direction by riveting, thereby the metal sleeve 53 is riveted and fixed to the temperature sensing element carrier 52 .

[0035] Alternatively, the metal sleeve 53 can also be connected to the temperature sensing element carrier 52 by heat riveting. Figure 3AThe figure shows the state where the metal sleeve 53 is sleeved on the temperature sensing element carrier 52 but has not yet been fixed by heat riveting. Figure 3B FIG. 5 shows the state after the metal sleeve 53 is fixed to the temperature sensing element carrier 52 by heat riveting. Figure 3A and Figure 3B As shown, the metal sleeve 53 is fixed to the temperature sensing element carrier 52 by heat riveting at a plurality of heat riveted connection portions P2 along the circumferential direction.

[0036] As described above, in the integrated pressure and temperature sensor provided in this embodiment, the metal sleeve 53 is configured to be connected to the temperature sensing element carrier 52 in a manner that does not contact the metal housing 2, thereby saving the cost of connecting the metal sleeve 53 to the metal housing 2. Therefore, the integrated pressure and temperature sensor according to the present disclosure is not only simple in structure, but also can reduce costs.

[0037] Furthermore, if Figure 1 As shown, the temperature detection module may further include a first sealing ring 54 , wherein the first sealing ring 54 is configured to achieve radial sealing between the temperature sensing element carrier 52 and the metal sleeve 53 .

[0038] In addition, the integrated pressure and temperature sensor according to the present disclosure may further include a second sealing ring 7 , which is configured to achieve radial sealing between the pressure sensing element 6 and the temperature sensing element carrier 52 .

[0039] In addition, the integrated pressure and temperature sensor according to the present disclosure may further include a third sealing ring 8 , which is configured to achieve radial sealing between the housing 2 and the metal sleeve 53 .

[0040] By providing the auxiliary components such as the first sealing ring 54, the second sealing ring 7 and the third sealing ring 8, the assembly of the sensor can be easily completed, and it can be ensured that the sensor has good sealing performance.

[0041] Compared with existing sensors, the integrated pressure and temperature sensor disclosed in the present disclosure integrates temperature measurement function and pressure measurement function, and reduces the conduction heat dissipation between the metal sleeve and the metal shell of the sensor by connecting the metal sleeve to the temperature sensing element carrier, thereby avoiding excessive heat diffusion, thereby improving the sensitivity and accuracy of the sensor temperature measurement. In addition, the integrated pressure and temperature sensor disclosed in the present disclosure is not only simple in structure, but also can reduce costs.

[0042] Although the present disclosure has been described with reference to exemplary embodiments, it should be understood that the present disclosure is not limited to the above exemplary embodiments. Various modifications and variations may be made to the above exemplary embodiments without departing from the scope and category of the present disclosure. The scope of the appended claims should be consistent with the broadest interpretation so as to include all such variations and equivalent structures and functions.

Claims

1. An integrated pressure and temperature sensor, characterized in that: The integrated pressure and temperature sensor comprises: a housing made of metal, defining a sensor port at a bottom of the housing, the sensor port being configured to receive a fluid; A connector, the connector being attached to the top of the housing, the housing, the connector and the sensor port collectively defining an inner cavity of the sensor; A pressure detection module, which is encapsulated in the inner cavity and includes a pressure-sensitive element, and is configured to detect the pressure of the fluid and generate a pressure signal; a temperature detection module, the temperature detection module being encapsulated in the inner cavity and comprising a temperature sensing element, a temperature sensing element carrier carrying the temperature sensing element, and a metal sleeve configured to protect the temperature sensing element, the temperature detection module being configured to detect the temperature of the fluid and generate a temperature signal; and an electronic module assembly encapsulated in the inner cavity, the electronic module assembly being configured to generate a pressure detection electrical signal based on the pressure signal and to generate a temperature detection electrical signal based on the temperature signal, The metal sleeve is configured to be connected to the temperature sensing element carrier in a manner that the metal sleeve does not contact the housing.

2. The integrated pressure and temperature sensor according to claim 1, characterized in that: The metal sleeve is connected to the temperature sensing element carrier by riveting.

3. The integrated pressure and temperature sensor according to claim 1, characterized in that: The metal sleeve is connected to the temperature sensing element carrier by heat riveting.

4. The integrated pressure and temperature sensor according to claim 1, characterized in that: The temperature sensing element carrier is made of plastic.

5. The integrated pressure and temperature sensor according to claim 4, characterized in that: The temperature sensing element is a thermistor.

6. The integrated pressure and temperature sensor according to claim 5, characterized in that: The temperature sensing element is a thermistor with a negative temperature coefficient.

7. The integrated pressure and temperature sensor according to any one of claims 1 to 6, characterized in that: The temperature detection module further includes a first sealing ring, which is configured to achieve radial sealing between the metal sleeve and the temperature sensing element carrier.

8. The integrated pressure and temperature sensor according to claim 7, characterized in that: The integrated pressure and temperature sensor further comprises a second sealing ring, wherein the second sealing ring is configured to achieve radial sealing between the pressure sensing element and the temperature sensing element carrier.

9. The integrated pressure and temperature sensor according to claim 8, characterized in that: The integrated pressure and temperature sensor further includes a third sealing ring configured to achieve radial sealing between the housing and the metal sleeve.

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