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Heat sensitive overheat protective device

An overheat protection and thermal technology, applied in thermal switch parts, heating/cooling contact switches, etc., can solve problems such as failure to achieve power failure, failure to achieve power failure, and reduced life of bimetallic actuators

Inactive Publication Date: 2003-04-30
吕彩玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This similar actuator needs a trip lever and a U-shaped spring piece to respond, and because the trip lever and U-shaped spring piece cannot be directly installed inside the actuator, the external volume increases, and the installation position needs sufficient space. space
Furthermore, when this type of actuator is used alone without an external tripping mechanism, it is impossible to completely cut off the power.
If there is no such mechanism, its working mode is as follows: when the bimetal moves, it moves the push rod, and the push rod opens the corresponding electrical contact to cut off the power, but due to the drop of temperature, the bimetal resets, so that the corresponding The group contact is connected again, and this repeated cycle cannot achieve the purpose of completely cutting off the power before the manual reset action after opening the contact
Can lead to reduced life of the bimetallic actuator and the potential for more damage from overheating of the heating element or loss of control of the bimetal

Method used

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Experimental program
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Embodiment Construction

[0036] The present invention comprises molded body 18, action arm 3, passive spring 8, U-shaped spring sheet 14, bimetallic actuator 16, sliding push rod 5, movable block 11, pressure spring 27 and fixed pressure spring on the molded body The pressure spring seat 28, the chute 9, the chute limit step 10.

[0037] The molded V-shaped edge 1 on the molded body 18 is matched with the V-shaped fulcrum 2 on the action arm, and the V-shaped edge 125 on the molded body is matched with the current-carrying member 15 on the U-shaped spring sheet , the action arm cutting edge 4 matches and interacts with the U-shaped spring piece 14, so that the action arm 3 and the U-shaped spring piece 14 are hit, and the two contacts 19, 20 on the current-carrying part 15 on the U-shaped spring piece are also in contact with the insurance The two corresponding contacts of the connection terminal 23 are engaged (only one set is drawn for ease of understanding), and the two sets of contacts are in a ti...

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PUM

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Abstract

A protection device of thermosensitive overheat is a self-locking device which executes the locking for the operation point of bimetallic actuator and to reset it only by manual resetting. It is set up at the bottom of the containers in heating contact means and it includes plastic body by moulding, carrier for plastic body by moulding, carrier for metal structural element, a pair of thermosensitive bimetal leaf in solation to each other, a set of self-locking part consisting of acting arm, U-shape spring sheet, sliding push lever, passive spring, sliding slot on movable blocks and step. The advantage of this design is that the action is occurred to make the corresponding self-lock mechanism act and lock when the temperature rising of heating element is overriding the set bimetallic temperature, and it is connected again only by the means of manual resetting.

Description

1. Technical field [0001] The invention relates to the improvement of the bimetallic actuator, in particular, it is a device which locks the working point of the bimetallic actuator and can only be reset by manual action. 2. Background technology [0002] In Chinese Patent No. 00103897.4, a controller for jointing the bottom of a liquid heating vessel is disclosed, which includes a carrier on which two bimetallic actuators are installed at opposite ends. The actuator works at the same temperature. A mold is attached to the carrier, which provides a cordless electrical connector for the vessel, and mounts switching means which can be operated by the actuator via a push rod. The push rod acts on a leaf spring to open its contacts and on further action engages the arm of a trip lever, disengaging the trip lever and causing the other arm of the lever to engage the leaf spring and Fully open its contacts. This similar actuator needs a trip lever and a U-shaped spring piece to ...

Claims

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Application Information

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IPC IPC(8): H01H37/64H01H37/70H01H37/74
Inventor 伏军
Owner 吕彩玲
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