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Temperature sensor

A technology of temperature sensor and thermal element, applied in thermometers, thermometer parts, instruments, etc., can solve problems such as discomfort and poor thermal responsiveness, and achieve the effect of high thermal responsiveness and improved thermal responsiveness

Inactive Publication Date: 2011-03-30
MITSUBISHI MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] That is, in the techniques described in the conventional patent documents 1 and 2, when a filler such as cement or silicone oil is inserted into the metal pipe, the heat capacity increases, so the thermal responsiveness deteriorates. When having sex, there is a bad condition of discomfort
Furthermore, as in the technology described in Patent Document 3, when a plate-shaped element on which a temperature-sensitive resistance film is formed is bonded to the bottom of the metal tube, although the responsiveness is improved, further speed-up of the thermal responsiveness is required.

Method used

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Embodiment Construction

[0024] Below, refer to Figure 1 to Figure 4 One embodiment of the temperature sensor according to the present invention will be described. In addition, in each drawing used in the following description, in order to make each member into a recognizable or recognizable size, the scale is changed suitably.

[0025] Such as figure 1 and figure 2 As shown, the temperature sensor 1 of this embodiment is, for example, a temperature sensor attached to the suction port of the EGR valve as a temperature sensor for detecting the temperature of EGR gas of a diesel engine, and is provided with a cylindrical metal pipe 2 with a bottom. The inner surface of the bottom of the metal pipe 2 is formed with a pair of terminal electrodes 3 of the thermosensitive element 4, a pair of wires 5 connected to the pair of terminal electrodes 3, and a connector 6 mounted on the opening end of the metal tube 2.

[0026] The metal pipe 2 is, for example, a bottomed cylindrical SUS (stainless steel) pip...

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Abstract

The present invention provides a temperature sensor, used for measuring temperature of EGR gas and the like, and capable of further improving thermal response. The temperature sensor comprises a bottom cylindrical metal pipe (2), a heat-sensitive element (4) arranged on an inner bottom face of the metal pipe (2) and provided with a pair of terminal electrodes, and a pair of conductors (5) connected to the terminal electrodes, the bottom of the metal pipe (2) is provided with a through hole (2a), and the heat-sensitive element (4) is configured to block the through hole (2a). Thereby, at least a part of the heat-sensitive element (4) is bared outwards from one end part of the metal pipe (2), and thermal response is improved by directly contacting with an external discharge gas and the like.

Description

technical field [0001] The present invention relates to a temperature sensor suitable for temperature measurement of EGR (Exhaust Gas Recirculation) gas, for example. Background technique [0002] In cars equipped with diesel engines, etc., adopting O 2 An EGR (Exhaust Gas Recirculation: Exhaust Gas Recirculation) system that reduces the emission of nitrogen oxides (NOx) by sending less exhaust gas to the combustion process and lowering the combustion temperature. [0003] In this EGR system, a temperature sensor for detecting the temperature of EGR gas is installed at the suction port of the EGR valve (exhaust gas recirculation control valve), and optimal oxygen content control is performed. [0004] Conventionally, as a temperature sensor for detecting the temperature of EGR gas or the like, for example, Patent Documents 1 and 2 propose a thermistor in which a conical glass-type thermistor is inserted into a metal tube together with a filler such as cement or silicone oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/22G01K1/14
Inventor 稻场均长友宪昭足立美纪
Owner MITSUBISHI MATERIALS CORP
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