air pressure protection switch

Abstract

The invention discloses an air pressure protection switch comprising a housing and a flexible separation layer. The flexible separation layer divides the housing into a first air chamber and a second air chamber; a contact plate is arranged at one side, arranged at the first air chamber, of the flexible separation layer; and two conductive plates cooperating with the contact plate are arranged inside the first air chamber. One of the first air chamber and the second air chamber is a sealed air chamber with a certain air pressure. When the first air chamber is the sealed one with the certain air pressure, the second air chamber is provided with an opening for connecting other devices; and when the second air chamber is the sealed one with the certain air pressure, the first air chamber is provided with an opening for connecting other devices. When the pressure of the first air chamber is less than that of the second air chamber, the conductive plates and the contact plate are in contact and the circuit is connected; and when the pressure of the first air chamber is larger than that of the second air chamber, the conductive plates and the contact plate are separated and the circuit is disconnected. The air pressure protection switch has advantages of simple structure, low manufacturing cost, and high stability.

Description

technical field

[0001] The invention relates to an air pressure protection switch, in particular to an air pressure protection switch with simple structure, low manufacturing cost and good stability. Background technique

[0002] The pressure switch is a device combined with an electrical switch. When the preset fluid pressure is reached, the switch contact will act. When the pressure in the system is higher or lower than the rated safety pressure, the disc in the sensor moves instantaneously, and the switch joint is connected or disconnected through the connecting guide rod. When the pressure drops or rises to the rated recovery value, the disc Instantaneous reset, the switch automatically resets, or in simple terms, when the measured pressure exceeds the rated value, the free end of the elastic element will be displaced, and the switch element will be pushed directly or after comparison to change the on-off state of the switch element to achieve control. purpose of measur...

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