Active safety detection method for dry cleaning machine

Abstract

The invention discloses an active safety detection method for a dry cleaning machine. A dry cleaning solvent concentration detection sensor detects the concentration of steam in a drying circulating air duct or a washing drum and controls the opening and closing of a nitrogen supplementing device and / or an electronic safety valve through an electric signal; the nitrogen supplementing device and / or the electronic safety valve are / is mounted in the drying circulating air duct; moreover, in a drying procedure, the dry cleaning solvent concentration detection sensor detects the concentration value of dry cleaning solvent steam in the drying circulating air duct; and the nitrogen supplementing device is controlled to be started and stopped according to comparison between the steam concentration with a first threshold value A and a second threshold value B. The nitrogen supplementing device and the dry cleaning solvent concentration detection sensor are arranged in the drying circulating air duct, so that the functions of automatic concentration detection and automatic nitrogen supplementing are achieved; the method belongs to an active intervention safety measure; the active anti-explosion safety of the dry cleaning machine with the drying function is achieved; and the method is an active safety measure.

Description

technical field [0001] The invention relates to the technical field of dry cleaning machine drying. Background technique [0002] The current dry cleaning solvents are generally divided into three types according to different materials, synthetic hydrocarbon solvents, for example, isododecane. The second is a chlorofluorosolvent, a typical representative of which is trichlorotrifluoroethane (CFC-113). The third is petroleum solvents, such as D40, D60, etc. [0003] In the drying process, the mixed vapor formed after the dry cleaning solvent evaporates has a flash point, which is the lowest temperature when there is enough fuel in the air to evaporate and dry and start to burn. The flash point is related to the concentration of dry cleaning solvent vapor, internal pressure, temperature and so on. For example, as the temperature inside a dry cleaning machine increases, so does the steam pressure. As the vapor pressure increases, the concentration of flammable liquids evapo...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the deficiencies in the prior art, the present invention provides an active safety detection method for dry cleaning machines, which is used to solve the technical defect that the concentration of dry cleaning solvent in the high temperature mixed steam in the existing dry cleaning machines is too high to easily cause flash explosion

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