Single-pole double-throw explosionproof pressure temperature controller with auxiliary switch

Abstract

The invention relates to a single-pole double-throw explosionproof pressure temperature controller with an auxiliary switch. A switch part of the temperature controller comprises a partition plate, amain switch box assembly and a switch cover assembly which form a dual-cavity structure explosionproof cavity, a sliding hole shaft interference fit structure is employed among a main push rod, an auxiliary push rod and the partition plate, plate bodies of the partition plate, the main switch box assembly and the switch cover assembly, corresponding plate bodies, a public terminal, a master control terminal, an auxiliary terminal and an additive terminal are in interference fit, the matched gap is smaller than or equal to 0.1 millimeter, and the matched length is larger than or equal to 2 millimeters. A part which probably generates electric spark and a leading-out end can be enclosed in the dual-cavity structure sealing cavity by minimum space, so that the explosionproof function of the single-pole double-throw explosionproof pressure temperature controller with the auxiliary switch can be achieved, and the appearance size of an original temperature controller also cannot be increased.

Description

technical field [0001] The invention relates to the technical field of pressure temperature controllers, in particular to a single-pole double-throw explosion-proof pressure temperature controller with an auxiliary switch. Background technique [0002] Pressure thermostats are widely used in the refrigeration control of refrigerators, freezers, etc. By sensing the temperature rise and fall inside the box, the micro switch is turned on and off, thereby controlling the start and stop of the refrigeration compressor to achieve temperature control. The main switch assembly of the pressure-type thermostat is usually connected in series with the refrigeration compressor to the mains power supply circuit, and the refrigerator and freezer can obtain a preset temperature range by controlling the start and stop of the compressor. Some pressure-type thermostats also have an auxiliary switch assembly, which is connected to other electrical devices such as door light switches. It is turn...

AI Technical Summary

Problems solved by technology

However, the explosion-proof structure disclosed in this patent is only a single-pole single-throw structure; and the place between the partition and the switch box and the place where the terminal passes out of the switch box must be sealed with epoxy resin. The production operation is troublesome, and it takes a while to wait for the epoxy resin to cure. The next step can be carried out, so the production efficiency is low

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