CN218444206U - Temperature sensor - Google Patents

Abstract

The utility model provides a temperature sensor (100), especially, relate to negative temperature coefficient thermistor temperature sensor, it includes metal casing (1), connector assembly (2) include connecting terminal (22) and connector shell (21), connector assembly (2) are connected with automobile controller, negative temperature coefficient thermistor (3) and extend from thermistor and first pin (31) and second pin (32) that go out, negative temperature coefficient thermistor (3) hold in metal casing (1), wherein, first pin (31) with connecting terminal (22) are connected, second pin (32) are connected with metal casing (1). The first pin (21) of the two pins is connected with the connecting terminal (22) to output an electric signal, the second pin (32) of the two pins is connected with the inner surface of the metal shell (1), and the metal shell (1) is directly or indirectly connected with a grounding part in the controller, so that the second pin (32) is grounded.

Description

Temperature sensor

Technical Field

The utility model relates to a temperature sensor especially relates to the temperature sensor who uses negative temperature coefficient thermistor temperature measurement.

Background

A ntc thermistor is a thermistor in which the resistance value rapidly decreases as the temperature increases.

CN212363477U discloses an NTC temperature sensor packaging structure, it includes thermistor, thermistor is connected with two or be greater than two pins, still includes the fine pipe of silica gel glass and metal casing, metal casing's a side is seted up and is communicated the installing port in the metal casing, thermistor set up in the metal casing, the pin stretches out from the installing port, the fine pipe of silica gel glass is located between metal casing and the thermistor, each the cover has heat-resisting sleeve pipe, each on the pin heat-resisting sleeve pipe's outside cover has heat-resisting insulation sleeve pipe, the metal casing inner wall is equipped with the arch, protruding with the fine pipe interference fit of silica gel glass.

In the negative temperature coefficient thermistor temperature sensor in the prior art, on one hand, the space occupied by the pins of the negative temperature coefficient thermistor is large, and the size and price of a product are influenced. On the other hand, the two lead legs and the connecting terminal of the NTC thermistor element need to be welded together to realize conduction. However, the pin part of the thermistor of the temperature sensor in this way has no insulation protection, and in the case of severe vibration, the pin inside the sensor can be short-circuited or even short-circuited, so that the sensor fails.

Disclosure of Invention

To the problem that exists among the prior art, the utility model aims at providing a temperature sensor, it is connected with metal casing through a pin in two pins with negative temperature coefficient thermistor and realizes ground connection to realize simple structure, stable performance's temperature sensor.

Therefore, the utility model provides a temperature sensor, it is used for confirming the temperature of car coolant liquid, and this temperature sensor includes metal casing, connector assembly, and this connector assembly includes connecting terminal and connector shell, and this connector assembly is connected with car controller, negative temperature coefficient thermistor and extend from negative temperature coefficient thermistor and first pin and the second pin that comes out, wherein, first pin with the connecting piece is connected, and connecting piece vapour vehicle controller is connected, with the second pin is connected with metal casing, and metal casing is connected with the casing of connector assembly, and the casing of connector assembly is connected with car controller's earthing terminal.

In the above temperature sensor, the second pin is fixed to the inner surface of the metal case by means of soldering.

In a preferred embodiment of the present invention, in order to realize the second pin grounding, the metal housing is connected to a grounding component of the vehicle controller.

According to the utility model discloses a preferred scheme, in order to realize ground connection, the second pin with metal casing welding back together, metal casing is connected with the connector shell, the connector shell is connected with automobile controller's ground connection part.

According to a preferred embodiment, a seal is provided between the sensor connector housing and the metal housing.

In the present invention, the connector housing may be made of stainless steel. In addition, the metal housing may also be made of stainless steel.

Drawings

The invention will be described in more detail below with reference to the schematic drawings. The drawings and corresponding examples are intended to illustrate and not to limit the invention. Wherein:

FIG. 1 shows a partial cross-sectional view of a prior art temperature sensor;

fig. 2 shows a cross-sectional view of an embodiment of a temperature sensor according to the invention.

List of reference numerals

100. Temperature sensor

1. Metal shell

2. Connector assembly

21. Connector shell

22. Connecting terminal

3. Negative temperature coefficient thermistor

31. First pin

32. Second pin

4. Sealing element

11. Thermistor with lead legs in the prior art

12. Pin of thermistor in prior art

13. Connecting terminal in prior art

Detailed Description

Exemplary embodiments of the present invention are described in detail below. The exemplary embodiments described below and illustrated in the figures are intended to teach the principles of the invention and to enable one skilled in the art to make and use the invention in a number of different environments and for a number of different applications. Accordingly, the exemplary embodiments are not intended to, and should not be considered as, limiting the scope of the invention. Rather, the scope of the invention is defined by the appended claims.

As shown in fig. 1, a prior art temperature sensor 100 is shown. As can be seen from the figure, the temperature sensor 100 has a metal shell and a connector shell which are connected in sequence, a connecting terminal 13 and a negative temperature coefficient thermistor 11, wherein the connecting terminal 13 and the negative temperature coefficient thermistor 11 are respectively and correspondingly connected through two elongated pins 12, so as to realize the electrical connection of the thermistor, and the negative temperature coefficient thermistor 11 is used as a temperature measuring element. On the one hand, the thermistor with two lead legs is bulky, and on the other hand, the solder between the lead legs and the connection terminals is easily broken when vibrated, resulting in a structure that is easily short-circuited.

Fig. 2 shows an exploded view of a temperature sensor 100 according to an embodiment of the invention. This temperature sensor is including protecting metal casing (1), connector assembly (2) are including connecting terminal (22) and connector shell (21), connector shell (21) are connected gradually with metal casing (1), and first pin (31) and second pin (32) that negative temperature coefficient thermistor (3) and follow negative temperature coefficient thermistor extend out, and negative temperature coefficient thermistor (3) and two pins (31, 32) hold in the inside of metal casing (1), connector assembly (2) are connected with automobile controller, wherein, first pin (31) with connecting terminal (22) are connected, second pin (32) are connected with metal casing (1). The second pin (32) and the metal shell (1) can be connected together in a welding mode. The metal shell (1) connected with the second pins (32) is connected with the connector shell (21), and the connector shell (21) is connected with a grounding part of the automobile controller, so that grounding can be realized.

In the present invention, the connector housing is metal and may be made of stainless steel. The metal case 2 may be made of stainless steel, and the carbon content of the stainless steel is preferably 0.03% or less. This is more advantageous for the implementation of the welding.

In the utility model, a sealing element (4) is arranged between the sensor connector shell (21) and the metal shell (1).

Other embodiments of the present invention will readily suggest themselves to such skilled persons having the benefit of this disclosure. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

Claims (8)

1. A temperature sensor (100) comprising

A metal shell (1),

A connector assembly (2), the connector assembly (2) comprising a connection terminal (22) and a connector housing (21), the connector assembly (2) being connected with a vehicle controller,

the thermistor comprises a negative temperature coefficient thermistor (3), a first pin (31) and a second pin (32) extending from the thermistor, wherein the negative temperature coefficient thermistor (3) and the first and second pins (31, 32) are accommodated in a metal shell (1), and the thermistor is characterized in that the first pin (31) is connected with the connecting terminal (22), and the second pin (32) is connected with the metal shell (1).

2. The temperature sensor (100) of claim 1, wherein the second pin (32) is welded to an inner surface of the metal housing (1).

3. The temperature sensor (100) according to claim 2, wherein the metal housing (1) is connected to a ground part of a vehicle controller.

4. The temperature sensor (100) according to any one of claims 1 to 2, wherein the metal housing (1) is connected with a connector housing (21), the connector housing (21) being connected with a grounded part of an automotive controller.

5. The temperature sensor (100) according to any one of claims 1 to 3, wherein a seal (4) is provided between the connector housing (21) and the metal housing (1).

6. The temperature sensor (100) according to any one of claims 1 to 3, wherein the metal housing (1) is made of stainless steel.

7. The temperature sensor (100) according to any one of claims 1 to 3, wherein the connector housing (21) is made of metal.

8. The temperature sensor (100) according to any one of claims 1 to 3, wherein the connector housing (21) is made of stainless steel.

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