Air guide box structure and internal circulation range hood using air guide box structure

Abstract

The invention discloses an air guide box structure which comprises a box body. The box body comprises a first side wall and a second side wall which are oppositely arranged, an air inlet is formed inthe first side wall, and air outlets are formed between the corresponding ends of the first side wall and the second side wall. The air guide box structure is characterized in that the second side wall is of a structure concave in the direction of the first side wall, the position, corresponding to the air inlet, of the second side wall is the largest concave position, the second side wall extendsobliquely from the position corresponding to the air inlet to the directions of the air outlets and gradually to the direction away from the first side wall, so that guide slopes are formed by the second side wall towards the inner side face of the first side wall from the middle to the ends. The invention further discloses an internal circulation range hood using the air guide box structure. Compared with the prior art, the air guide box structure has the advantages that the top surface of the air guide box structure is provided with the guide slopes, so that air flow can be accordingly guided to the air outlets, and eddy current generated by direct rebound of the air flow under the condition of no guide is avoided.

Description

technical field [0001] The invention relates to a lampblack purifying device, in particular to an air guide box structure and an internal circulation range hood applied with the air guide box structure. Background technique [0002] Range hoods have become one of the indispensable kitchen appliances in modern families. The range hood uses the principle of fluid dynamics to work, sucks and exhausts the range hood through a centrifugal fan installed inside the range hood, and uses a filter to filter some grease particles. The centrifugal fan includes a volute, an impeller installed in the volute and a motor that drives the impeller to rotate. When the impeller rotates, a negative pressure suction is generated in the center of the fan, and the oil fume under the range hood is sucked into the fan, and after being accelerated by the fan, it is collected by the volute and guided out of the fan cover. [0003] According to the fume discharge method, range hoods can be divided int...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned collection and exporting device (air guide box) discharges the purified airflow through a simple fence structure, and the upper top of the air guide box forms the refraction of the airflow, and there is a phenomenon of downward airflow, generating eddy currents and affecting user experience. see Figure 9 , the airflow formed on the right side of the circular air inlet is a vortex; at the same time, after being discharged from the air guide box, it directly hits the cabinets on both sides, goes down the cabinets, and part of the oil fume blows to the operator along the top of the range hood. head, causing extreme discomfort to the operator

Part of the fume flows downward along the gap between the cabinet and the left and right sides of the range hood, blowing the flame of the stove, resulting in flame turbulence, which affects the cooking effect; in addition, there is no noise reduction design, which generates a lot of noise

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