Self-cleaning exhaust hood and control method thereof

Abstract

The invention relates to a self-cleaning exhaust hood and a control method thereof. The self-cleaning exhaust hood comprises a fume collecting hood, a filter net, a fume guiding plate, a fan, an air outlet hood and an air guiding pipe, the fume guiding plate can ascend to seal an air inlet of the fume collecting hood, and a liquid inlet valve capable of adding a cleaning medium into a cavity defined by the fume guiding plate and the fume collecting hood is arranged on the fume collecting hood; a first air outlet and a second air outlet are formed in the air outlet hood, and a switching mechanism allowing only one of the first air outlet and the second air outlet to be opened or closed is arranged in the air outlet hood; and the first end of the air guiding pipe is connected with the secondair outlet, and a ventilation opening connected with the second end of the air guiding pipe is formed in the fume collecting hood. In use, the cleaning medium is input into the inner cavity defined by the fume guiding plate and the fume collecting hood in advance, the fan is started, air is continuously input into the cleaning medium to form turbulent multi-phase fluid, the filter net is soaked and washed, thus oil contamination on the filter net is removed, the good filter net cleaning effect is achieved, and the filtering performance of the exhaust hood is improved.

Description

Technical field [0001] The invention relates to a self-cleaning range hood and a control method thereof. Background technique [0002] The existing self-cleaning technology for range hoods mostly cleans the volute and impeller of the hood. For example, the invention patent with application number CN201610790285, which uses an ultrasonic vibrator to clean the impeller, volute and other parts. However, this solution requires immersion of the impeller volute, which is likely to cause short circuit of the motor. At the same time, the long-term vibration of the ultrasonic vibrator will easily shake off the paint on the surface of the impeller, affect the dynamic balance, and easily increase the assembly gap between the motor impellers. There are security risks. [0003] The Chinese utility model patent "A Rotating Centrifugal Oil Fume Separation Device" (application number: 201420732722.1) with the authorized announcement number CN 204285570U discloses a structure, which includes a rot...

AI Technical Summary

Problems solved by technology

However, this solution requires soaking the volute of the impeller, which is likely to cause a short circuit of the motor; at the same time, the long-term vibration of the ultrasonic vibrator can easily shake off the paint on the surface of the impeller, affect the dynamic balance, and easily increase the assembly gap between the impellers of the motor. There are security risks

[0003] The Chinese utility model patent "A Rotating Centrifugal Fume Separating Device" (Application No.: 201420732722.1) with the authorized announcement number CN 204285570U discloses a structure, which includes a rotating mesh disk and a wind wheel, and the rotating mesh disk is installed at the air inlet of the wind wheel At the position, the edge of the rotating mesh disk is connected to the edge of the front ring of the wind wheel or the center of the rotating mesh disk is connected to the center of the wind wheel or the rotating mesh disk is integrally formed with the front ring of the wind wheel. This structure can achieve oil fume purification to a certain extent. However, During use, the grease adhering to it is naturally removed by centrifugation. After long-term use, stubborn grease will inevitably adhere to it, which will affect its filtration performance.

The invention patent with the application number CN201710090668 uses steam injection to clean the filter screen. This solution adds an additional cleaning module, which increases the cost and reduces the reliability; at the same time, limited by the power of the additional module, the cleaning power of this solution small, incomplete cleaning

[0004] Moreover, the above-mentioned existing filter screen self-cleaning structures are all aimed at cleaning the filter screen installed at the air inlet of the fan, and cannot clean the filter screen at the air inlet of the smoke collecting hood. The filter at the tuyere is the first to contact with the fume particles, which is more likely to accumulate dirt. If it is not cleaned for a long time, it will easily affect the filtration performance of the range hood

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