JPS6045898A - Thermoelectric conversion type fire sensor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] The present invention relates to a fire detector using thermoelectric converter metal.
By making the thermoelectricity M' of one of the two heat receiving parts of the thermoelectric converter larger than the heat capacity of the other.

It is designed to operate in response to a sudden rise in temperature caused by a fire.

The fire L&detector detects an abnormal temperature or sudden temperature change under the ceiling in the event of a fire, thereby detecting a fire. Conventional fire detectors can be broadly divided into fixed temperature type and differential type. A constant temperature type detects a fire when a certain temperature is reached, and is made of, for example, bimetal. The differential type detects edge fires due to rapid temperature changes, and uses two elements with different thermal time constants to detect gradual temperature changes due to temperature changes. In the case of a fire, the effects of one element cancel each other out and do not operate, and the effect of the non-permanent element in response to a rapid temperature change such as a fire is reduced and becomes operational. As a conventional differential fire detector, for example, an air film type is rarely used. It has an air bladder, and the heat from the fire causes the air inside the bladder to expand.

This device operates a microswitch in response to the diaphragm capping, and it operates only when the temperature rises rapidly, and when the temperature rises gradually.

2. Air escapes from the small hole in the diaphragm, preventing it from operating. This air film type is generally used as a spot type placed scattered on the ceiling.
There is also a distribution type, which has two or three copper pipes (air pipes) placed around the ceiling and detects the expansion of the air inside the pipes in the event of a fire (air pipe type). .

Passed away. Other differential fire detection a porridges include the IC thermocouple type, which combines two types of conductors with 7t14/ζ0, of the conventional methods listed above, the bimetal type, the air 14 type, and the air type.
Since the first set has moving parts, there is a problem with durability.
(The air tube type had the disadvantage of being large-scale.

Also, in thermocouple type.

The length of the conventional sensor itself is approximately 30m.
C, there was an aesthetic problem when the ceiling VC hole was set at 9th.

This invention was made in consideration of the above points.

It is an object of this invention to provide a fire detector which has no wettable parts, is excellent in heat resistance, and can be combined with parentheses.

With this invention, by using a thermal converter, the heat capacity of one of the two heat receiving parts can be converted to the heat capacity of the other heat receiving part;
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In other words, the ratio of the temperature rise of the heat receiving part for the same heat input VC should be changed, and the system should be able to sense sudden changes in the event of a fire, but should not operate in response to gradual temperature changes such as changes in air temperature. ing.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to six attached one-dimensional drawings.

Thermoelectric converter Q in Figure 1, P-type semiconductor 1 and N-type semiconductor 2
are arranged alternately, and their upper and lower sides are alternately VC connected with metal pieces 3.4 (connected in series, and heat receiving parts A and B are respectively formed on the upper and lower surfaces. Therefore, the heat receiving parts A, One side r of B (if you add Yanquan, both ψ11
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This thermo-electromotive force is input to the 5VC voltage generator and compared with the reference voltage. When a thermo-electromotive force that exceeds the reference cardiac pressure is generated, a fire alarm signal is emitted and an alarm is sounded. . In addition, if the thermal l12L conversion element is made of a material with an amorphous structure, a deflection efficiency of 65 can be achieved at low cost.
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Each of the heat receiving parts A and B is provided with a metal piece of 3.4VC electrically insulating material 6 and 7, respectively. The L joint is bent. Historically, a member O8 having a relatively large specific heat, such as copper, is joined to one of the heat receiving parts A. Since there is a relay 8 in this part, the heat receiving part A also receives thermoelectric power from the heat receiving part B. However, for the same amount of heat input, the temperature of the heat receiving part B increases as well as the temperature of the heat receiving part A 9.

- For the (14' configuration) of Section 2, the temperature difference between heat receiving parts A and H should be
small. However, the thermoelectromotive force is small, so
01 No erection. However, when the sudden temperature at the time of a fire < has a large heat capacity, so the temperature does not rise.In the past, L8.

i: 1, L., fire detection z: Y in Figure 1 is placed on the ceiling 9
Roaring J, Ridai ((1, General VC is the work unit in the same figure, heat receiving part B all the pieces L2 handle 1") 1 female heat part B yc,
A larger heat input will reduce the force I, but this does not necessarily mean that it will be reduced by 1. j - i.e. j
a1≦A, C where the same heat input is applied to B is also sensed - CH
≧It is also possible to take this, for example, in an upright position.

, 1. In the above-mentioned example, the heat capacity of the heat receiving part A was increased and the member 8 was provided with a separate tray V'c.

Ukebu, Q-It A (1i11 metal piece 3 itself 1
For example, as shown at 3' in FIG. 2, it is possible to increase the heat capacity by making it more comfortable.

As explained above, the present invention utilizes a thermoelectric converter to increase the heat capacity of one of the two heat receiving parts and the thermoelectric power capacity 9 of the other heat receiving part, so that sudden damage caused by a fire can be avoided. A detector can be constructed that operates on changes in force. Also, since there is no -o7 excitation part, it has excellent durability.

Compared to the conventional thermocouple type, it is possible to organize the connectors.

In addition, since it is essentially a stationary type and does not require air circulation, it can be embedded in a ceiling IC. Furthermore, the mounting direction is also flexible.

[Brief explanation of drawings]

FIG. 1 is a diagram showing one embodiment of the invention, and FIG. 2 is a diagram showing another embodiment of the invention. 1...-P-type semiconductor, 2...N-type semiconductor, 3.3',
4 metal piece, 6, 7... electrical insulator, 8... member for increasing heat capacity, A, B... heat receiving part

Claims (1)

[Claims] A thermoelectric conversion type fire detector in which the heat capacity of one heat receiving part of a thermoelectric converter is made larger than the heat capacity of the other heat receiving part.