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Linear temp. sensing detector based on thermocouple principle

A technology based on the principle of temperature sensing detectors and thermocouples, which is applied to fire alarms with electrical action, thermometers and instruments that use electrical/magnetic components directly sensitive to heat, etc. It can solve the problem of no short circuit fault alarm function and inability to distinguish short circuits. Problems such as fault alarm and short-circuit fire alarm signal to achieve high reliability

Active Publication Date: 2007-04-18
SURELAND IND FIRE SAFETY
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Problems solved by technology

However, the shortcoming of this kind of linear heat detector is that it only has short-circuit fire alarm function, but no short-circuit fault alarm function, so it is impossible to distinguish short-circuit fault alarm and short-circuit fire alarm signal

Method used

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  • Linear temp. sensing detector based on thermocouple principle
  • Linear temp. sensing detector based on thermocouple principle
  • Linear temp. sensing detector based on thermocouple principle

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Embodiment Construction

[0021] The linear temperature detector based on the thermocouple principle provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The linear temperature-sensitive detector based on the thermocouple principle provided by the present invention mainly includes a detection cable and a voltage signal measuring device connected to one end of the detection cable. As shown in Fig. 3 and Fig. 4, the detection cable includes at least two detection conductors 4, 5 arranged in parallel and a semi-conductor for separating the detection conductors 4, 5 arranged in parallel between the detection conductors 4, 5 Material layer 7 and fusible insulating layer 6 . At least one of the detection conductors 4 and 5 is a thermocouple wire, and the rest are thermocouple wires, ordinary metal wires or elastic conductors, thus forming a thermocouple, and nickel-titanium memory alloy, nickel-titanium-copper memory alloy...

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Abstract

The invention relates to a linear heat detector based on thermocouple principle. It includes detecting cable and voltage signal measuring device. The detecting cable at least includes two detecting conductors and semiconductor layer, fusible insulated layer and conductive layer. The linear sensor would cause dissolution to the fusible insulated layer and generate thermocouple effect to output fire alarming signal. The voltage of voltage signal measuring device is corresponding to the temperature of highest section of the detecting cable and it has high reliability. The invention adopts passive detecting method and is very safety.

Description

technical field [0001] The invention relates to a linear temperature-sensitive detector based on the thermocouple principle, in particular to a linear temperature-sensitive detector based on the thermocouple principle with high reliability and simple structure. Background technique [0002] Thermocouple type linear temperature detector is a kind of fire detector with wide application. It is usually divided into two types: recoverable type and non-recoverable type. It is mainly composed of a detection cable and a voltage signal measuring device connected to one end of the detection cable. . Fig. 1 is a cross-sectional view of a partial structure of a detection cable in a recoverable linear heat detector in the prior art. As shown in Figure 1, the detection cable in this prior art recoverable linear temperature detector consists of two detection conductors 3 arranged in parallel, an NTC characteristic barrier layer 2 arranged between the detection conductors 3 and It consist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B17/06G01K7/18
Inventor 张卫社李刚进
Owner SURELAND IND FIRE SAFETY
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