Method and device for detecting good contact of filter screen

Abstract

The invention relates to the technical field of purification, in particular to a method and a device for detecting whether a filter screen is in good contact or not. The method comprises the steps of: acquiring negative-high-voltage direct current on the filter screen, and converting a direct current into a voltage signal; subjecting the voltage signal to reverse operational amplification to obtain forward direct-current voltage, and outputting the forward direct-current voltage through the output end; when the filter screen is switched on, acquiring the output voltage of the output end to judge whether the output end has direct current voltage or not; when the output end has direct-current voltage, indicating that the filter screen is in good contact. The problem that in the actual use process of the purifier based on electrostatic dust collection, a user cannot perceive whether the filter screen is in good contact or not, and consequently the purification effect of the purifier is weakened or even does not exist is solved. The method and the device has the effect that the purifying effect of the purifier is good.

Description

technical field [0001] The present application relates to the technical field of purification, in particular to a method and device for detecting whether a filter screen is in good contact. Background technique [0002] Electrostatic precipitator is a kind of gas dedusting method. Its principle is: the dust-laden gas is electrically separated when it passes through a high-voltage electrostatic field, and the dust particles and negative ions are combined with negative charges, and tend to discharge and deposit on the surface of the anode. That is, in a strong electric field, air molecules are ionized into positive ions and electrons, and the electrons encounter dust particles in the process of rushing to the positive electrode, so that the dust particles are negatively charged and adsorbed to the positive electrode for collection. [0003] The purifier based on electrostatic dust removal uses a conductive plastic material filter screen. By connecting high-voltage electricity ...

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Problems solved by technology

Conventional activated carbon adsorption filter cannot remove dust when saturated, and the filter needs to be replaced regularly

[0004] However, the power supply of the purifier to the filter screen needs to be connected by wires. During the assembly process of the whole machine, it is impossible to judge whether the wires are in good contact or whether the filter screen is installed correctly.

[0005] Regarding the above-mentioned related technologies, the inventor believes that there is a situation where the user cannot detect whether the filter screen is in good contact during the actual use of the existing purifier based on electrostatic dust removal, resulting in weakened purification effect of the purifier, or even no purification effect Defects

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