Protector

Abstract

The invention discloses a protector. The protector comprises a base, an upper cover and a movable contact spring, the base is provided with an electric heating wire and a static contact which are connected, a first bimetallic strip is arranged above the electric heating wire, one end of the movable contact spring is fixed to the upper cover, so that a movable contact of the movable contact spring is opposite to the static contact, a top column is arranged in the middle of the movable contact spring, the firstbimetallic strip is heated to abut against the top column and further push the movable contact spring away, the upper cover is provided with a supporting column, the supporting column is sleeved with a rocker arm capable of rotating around the supporting column, the end of the rocker arm is provided with a conductive connecting block, the side edge of the rocker arm is further connected with a spring enabling the rocker arm to rotate around the supporting column, and the arc edge, sleeving supporting column, of the rocker arm is provided with a clamping protrusion. The base is vertically provided with a second bimetallic strip close to an electric heating wire, the second bimetallic strip clamps the clamping protrusion, enables the conductive connecting block to abut against the position between the moving contact and the static contact and then enables the spring to deform, the second bimetallic strip is heated to loosen the clamping protrusion, the spring deforms and returns to rotate around the supporting column to move away the conductive connecting block, a loop is effectively disconnected, and the hidden danger of short circuit caused by contact between the movable reed and the static contact is eliminated.

Description

technical field [0001] The invention relates to a circuit protection device, in particular to a compressor protector. Background technique [0002] Compressor protector is an indispensable protection product to maintain the normal working voltage of industrial equipment during operation. There is an overload protector in series in the circuit circuit of the compressor. When the circuit current is too large or the temperature of the compressor is too high, the overload protector will be disconnected and the power circuit will be disconnected to achieve the purpose of protecting the compressor and electrical equipment. [0003] The structure of the existing compressor protector is to set the heating wire in the protector shell, the heating wire is connected in series to the circuit loop, the bimetal is arranged above the heating wire, the moving reed assembly is arranged above the bimetal, and the moving reed assembly The moving contact of the circuit is kept in contact with ...

AI Technical Summary

Problems solved by technology

The bimetal sheet of this structure is freely placed on the heating wire, and the distance between the bimetal sheet and the heating wire cannot be fixed. When the distance between the bimetal sheet and the heating wire is too small, when the heating wire is impacted by a large current, there will be bimetal In the event that the sheet springs up and touches the moving reed assembly, it may seriously contact and stick to the moving reed assembly to form a circuit, resulting in the failure of the protector

However, when the distance between the bimetal sheet and the heating wire is too large, the bimetal sheet cannot sense the heat change of the heating wire and deform, and cannot disconnect the circuit in time, posing a great safety hazard

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