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Temperature detecting fire alarm device made of thermoelectric materials

A fire alarm and thermoelectric material technology, which is applied in the direction of fire alarms with electric action, thermometers using electric devices, and electric/magnetic components directly sensitive to heat, etc., can solve the problem of line aging, false alarm rate and false alarm rate. Large and other problems, to achieve the effect of pollution-free production, wide application temperature and small size

Active Publication Date: 2010-07-07
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

[0002] The alarm system used in most places is a smoke alarm system, but it has the disadvantage of being too sensitive. Smoke, steam, etc. can make the alarm alarm, that is to say, its false alarm rate is too high. If you relax your vigilance, you will be careless about the alarm sound, so solving the problem of false alarm rate becomes the key to the current fire alarm system
[0003] The power supply required by the smoke alarm system requires external power supply or dry batteries, etc. If the alarm is installed and not used for a long time, the aging of the line will cause the alarm to fail
If a dry battery is used for power supply, the battery will fail due to the long use time and the alarm will fail

Method used

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  • Temperature detecting fire alarm device made of thermoelectric materials
  • Temperature detecting fire alarm device made of thermoelectric materials
  • Temperature detecting fire alarm device made of thermoelectric materials

Examples

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Embodiment 1

[0033] Step 1, making P-type thermoelectric column 51 bismuth-rich Bi 2+0.06 Te 3 Material

[0034] (1) The weighed Te 0.1914g, BiCl 3 0.3250g and 0.7445g of EDTA_2Na are added to a reaction kettle with a polytetrafluoroethylene liner and a volume of 45ml;

[0035] (2) Then add 25ml of DMF (N,N-dimethylformamide), 10ml of absolute ethanol, and stir for 2 hours under a magnetic stirrer, then add 2.24g of KOH, and stir for 1 hour with a magnetic stirrer;

[0036] (3) Put the reaction kettle into a box-type resistance furnace for reaction, and keep it at 140°C for 24 hours;

[0037] (4) After the reaction is finished, wash with deionized water and absolute ethanol respectively, and centrifugally filter to obtain the product, and dry the product at a drying temperature of 80° C. for 60 minutes to obtain a gray-black powder.

[0038] (5) The gray-black powder is pressed into a block sample under a pressure of 10 MPa;

[0039] (6) Then place the block sample in the porcelain a...

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Abstract

The invention discloses a temperature detecting fire alarm device made of thermoelectric materials, comprising a thermoelectric converter, a signal processing circuit and an alarm, wherein the thermoelectric converter is used for converting variation of the ambient temperature into voltage signals and outputting the voltage signals to the signal processing circuit; the signal processing circuit is used for filtering and comparing the received voltage signals and then driving the alarm to ring, thus realizing alarm on fire; and the alarm is used for sending out an acousto-optic signal to promote alarm. The thermoelectric converter adopts the structure of concatenated thermoelectric pairs. Each group of thermoelectric pairs 5 is equal to a small power supply and that the output voltage is obtained through repeated addition of the voltage of each small power supply can be known according to the power supply concatenation rule in the circuit, thus the fire alarm device is environmentally friendly, without needing transmission parts, and has small system volume and wide temperature application range.

Description

technical field [0001] The invention relates to a fire alarm device, more particularly, a temperature detection fire alarm device made of thermoelectric material. Background technique [0002] The alarm system used in most places is a smoke alarm system, but it has the disadvantage of being too sensitive. Smoke, steam, etc. can make the alarm alarm, that is to say, its false alarm rate is too high. The vigilance is relaxed, and the alarm sound is careless, so solving the problem of false alarm rate has become the key to the current fire alarm system. [0003] The power supply required by the smoke alarm system requires external power supply or dry batteries, etc. If the alarm is installed and not used for a long time, the aging of the line will cause the alarm to fail. If dry batteries are used for power supply, the batteries will fail and the alarm will fail because of the long use time. Contents of the invention [0004] The object of the present invention is to provid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B17/06G01K7/02
Inventor 邓元祝薇胡梦婕陈辰徐光跃
Owner BEIHANG UNIV
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