Automatic relay control alarm device based on fire accident

Abstract

The invention discloses an automatic relay control alarm device based on a fire accident, which comprises a shell. An induction cavity with a forward opening is formed in the shell; a contact cavity is formed in the right side of the induction cavity in a communicating manner; a memory alloy sheet is fixedly arranged on the left wall of the induction cavity; the rightward extending part of the memory alloy sheet extends into the contact cavity; the contact cavity is provided with a relay control mechanism which controls the operation of the mechanism in the device through the softening of thememory alloy sheet when the external fire temperature rises; an alarm lamp is fixedly arranged on the top surface of the shell; and a control cavity is arranged in the shell. Whether a fire accident happens to the outside or not can be effectively monitored through the deformation characteristics of the memory alloy, then other mechanisms in the device are operated through the relay control system, the control effect is higher, and the transmission efficiency is higher.

Description

technical field [0001] The invention relates to the technical field of relay control, in particular to an automatic relay control alarm device based on fire accidents. Background technique [0002] The relay control system means that all the voltage of the drive power supply is applied to the executive motor in a positive or negative direction according to the sign of the control deviation value. Among them, in the two-position temperature adjustment, bimetallic strips are often used as sensitive elements When the temperature changes, the bimetal sheet bends and deforms due to the different expansion coefficients of the two parts of the metal, and the contact is connected or disconnected. In addition, the characteristic of the memory alloy is that it can produce different deformation characteristics at different temperatures. The general relay The control devices are all made of metal sheets, which have a short service life and cannot be used many times. Moreover, the genera...

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Problems solved by technology

[0002] The relay control system means that all the voltage of the drive power supply is applied to the executive motor in a forward or reverse direction according to the sign of the control deviation value. Among them, in the two-position temperature adjustment, bimetallic strips are often used as sensitive elements When the temperature changes, the bimetal sheet bends and deforms due to the different expansion coefficients of the two parts of the metal, and the contact is connected or disconnected. In addition, the characteristic of the memory alloy is that it can produce different deformation characteristics at different temperatures. The general relay The control devices are all made of metal sheets, which have a short service life and cannot be used multiple times. Moreover, the general fire alarm device cannot have a mechanism for cooling the external environment. If it only encounters a general temperature rise, it will make a misjudgment

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