Positive pressure explosion-proof control cabinet and control method thereof

Abstract

The invention provides a positive pressure explosion-proof control cabinet. The positive pressure explosion-proof control cabinet comprises an air supply module, a pressure relief module, a control module, an abnormal alarm module and a power supply switching module, wherein the air supply module is matched with the pressure relief module to maintain positive pressure in a positive pressure chamber of the positive pressure explosion-proof control cabinet; the control module is electrically connected with the air supply module, the pressure relief module, the abnormal alarm module and the power supply switching module respectively; the abnormal alarm module is used for carrying out alarming on an abnormal operation of the positive pressure explosion-proof control cabinet; and the power supply switching module is used for controlling a power supply of a user electrical system in the positive pressure chamber of the positive pressure explosion-proof control cabinet. The invention further provides a control method of the positive pressure explosion-proof control cabinet. The positive pressure explosion-proof control cabinet and the control method thereof provided by the invention are stable in air supply and high in safety; and the problem of heat dissipation of the positive pressure explosion-proof control cabinet can be effectively solved, so that the energy conservation and environmental protection effects are reached; and the operating reliability and stability of the positive pressure explosion-proof control cabinet are improved.

Description

Technical field [0001] The invention relates to the field of explosion-proof control cabinets, in particular to a positive pressure explosion-proof control cabinet and a control method thereof. Background technique [0002] With the continuous development of China's industry and the increasing scale of production, such as in the field of dangerous industries such as petroleum, chemical industry, metallurgy, oil field, coal and plastic spraying, positive pressure explosion-proof cabinets are more and more widely used for explosive hazards. Zone 1 of gas or steam (a place where an explosive gas environment may occur during normal operation) and Zone 2 (a place where an explosive gas environment may not occur during normal operation; if it occurs, it happens occasionally and only exists for a short time Site) Hazardous sites, especially for various power control systems and automatic control system cabinets in explosive hazardous areas. Due to the presence of positive pressure in t...

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Problems solved by technology

[0005] In order to solve the above-mentioned technical problem that the existing positive pressure explosion-proof cabinet cannot realize heat dissipation and economical energy saving at the same time, the present invention provides a positive pressure explosion-proof control cabinet and its control method, which not only has stable air supply and high safety, but also can effectively solve the problem of The problem of heat dissipation of the positive pressure explosion-proof control cabinet, so as to achieve the effect of energy saving and environmental protection and improve the reliability and stability of the operation of the positive pressure explosion-proof control cabinet

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