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Small-sized temperature sensor module and manufacturing method thereof

The technology of a temperature sensor and its manufacturing method is applied in the direction of thermometers, thermometers and instruments using electric/magnetic elements that are directly sensitive to heat, and can solve problems such as lack of heat insulation materials, poor impact resistance, and errors in measurement results, and achieve The effect of wide temperature measurement range, good impact performance and fast response speed

Pending Publication Date: 2017-07-04
新乡北方车辆仪表有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the armored platinum resistor is popular in the market. The armored platinum resistor is drawn from the resistor body, lead wire, insulating magnesium oxide and protective sleeve. The top is welded with the platinum resistor. 304 and 316 (316L) are the most widely used. Stainless steel protection tube material, this type of temperature sensor has poor impact resistance when it is directly used on a moving object such as a car. In addition, due to the lack of heat insulation material, the heat derived from the sensor sleeve will cause errors in the measurement results

Method used

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  • Small-sized temperature sensor module and manufacturing method thereof

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Embodiment 1

[0021] Embodiment one: see figure 1 , a miniaturized temperature sensor module in the figure, including an internal stainless steel armored PT1000 heat probe and an external stainless steel fixing sleeve, which is characterized in that: the inner diameter of the fixing sleeve is greater than the outer diameter of the heat probe, between the heat probe and the fixing sleeve Filled with Teflon insulation, the stainless steel probe protrudes a length from the retaining sleeve. The part of the stainless steel probe located in the heat insulation layer is provided with a limiting ring. Avoid axial movement of the stainless steel probe after thermal expansion and contraction. The end of the solid sleeve close to the end of the probe is provided with inner and outer folds, and the inner folds are used to limit the position of the heat insulation layer. The stainless steel fixing sleeve is made of 316L stainless steel.

Embodiment 2

[0022] Embodiment 2: A method for manufacturing a miniaturized temperature sensor module, including the following method

[0023] ①The stainless steel fixing sleeve is made by cutting, using 316L stainless steel;

[0024] ② At the same time, select a suitable stainless steel armored PT1000 thermal probe;

[0025] ③Injection molding

[0026] Put the stainless steel armored PT1000 heat probe into the center of the above-mentioned fixed sleeve, and inject the melted polytetrafluoroethylene into the gap between the two to form a heat insulation layer;

[0027] ④ Cool until the heat insulation layer is solidified, and then trim the heat insulation layer with cutting tools to complete the production. figure 1 The miniaturized temperature sensor module shown in;

[0028] One end of the fixed sleeve in the step ① is cut to form inner and outer folds. The outer flange is used for axial positioning of the module itself after installation;

[0029] In the step ②, the stainless steel...

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Abstract

The invention relates to a small-sized temperature sensor module and a manufacturing method thereof. The module comprises an internal stainless steel armored PT1000 thermal probe and an external stainless steel fixing sleeve, wherein the inner diameter of the fixing sleeve is larger than the outer diameter of the thermal probe, and the part between the thermal probe and the fixing sleeve is filled with a polytetrafluoroethylene thermal insulating layer; the stainless steel probe extends out of the fixing sleeve at a certain length. The module is manufactured by the steps of (1) carrying out cutting machining; (2) selecting the thermal probe; (3) molding by means of injection molding. The integral small-sized temperature sensor module is capable of rapidly detecting various environment temperatures, has the accuracy of grade A, and is rapid in response speed, better in vibration-resistance and, impact property and wider in temperature measurement range.

Description

technical field [0001] The invention relates to the technical field of sensors in automobile circuits, in particular to a miniaturized temperature sensor module and a manufacturing method. Background technique [0002] Temperature is a physical quantity that characterizes the degree of coldness and heat of an object. It can be indirectly measured through certain characteristics of the object that change with temperature (such as resistance, voltage change, etc.). Through research, it is found that the resistance value of metal platinum (Pt) changes with temperature. change, and has good reproducibility and stability. The sensor made of this physical characteristic of platinum is called a platinum resistance temperature sensor. The zero-degree resistance of the commonly used platinum resistance temperature sensor is 1000Ω, and the resistance change rate is 3.851 Ω / °C. The platinum resistance temperature sensor has high precision, good stability and wide application temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/18
CPCG01K7/18
Inventor 杨克明范光华王利真李丽范砚坤孙志崔增菊崔瑛
Owner 新乡北方车辆仪表有限公司