Double back suction range hood

Abstract

The invention provides a dual back suction type smoke exhaust ventilator, comprising a wind collecting box, wherein the upper half of the front end surface of the wind collecting box has at least onefirst extraction opening which transversely extends and is narrow and long; the lower half of the front end surface of the wind collecting box has at least one second extraction opening which transversely extends and is narrow and long; the at least one first extraction opening is parallel to the at least one second extraction opening; the at least one first extraction opening and the at least onesecond extraction opening communicate with at least one exhausting device; and when the at least one exhausting device is exhausting gas, the total flow rate of gas passing through the at least one second extraction opening at the same time is greater than the total flow rate of gas passing through the at least one first extraction opening. Therefore, after most of oil fume is extracted by the atleast one second extraction opening, a small part of upwardly flowing oil fume is extracted by the at least one first extraction opening, thereby achieving the effect of complete elimination the oilfume.

Description

technical field [0001] The invention relates to a double-back suction range hood, in particular to a range hood which can effectively remove oil fumes and is suitable for factories, laboratories and kitchens. Background technique [0002] In order to improve the problem of poor fume exhaust efficiency of traditional range hoods, the inventors used the principle of aerodynamics to develop a range hood with an air curtain to overcome the above problems. However, a range hood capable of producing a two-dimensional air curtain must be equipped with air blowing and exhaust devices at the same time, which is quite troublesome in replacement or installation, and will increase equipment and labor costs. [0003] Based on the above problems, the inventor has further improved another type of range hood, its structure mainly includes a suction hood, a left vertical plate and a right vertical plate, wherein the left and right vertical plates are respectively combined with the suction T...

AI Technical Summary

Problems solved by technology

[0006] An object of the present invention is to provide a kind of air suction port that is provided with a transverse and narrow and long shape respectively on the upper half and the lower half of the front face of the wind collecting box, and the total gas flow through the lower air suction port at the same time is greater than The double-back suction range hood with the total gas flow through the upper air inlet can solve the problem that the existing range hood feels more oppressive as a whole, and can provide another structure for effectively removing oil fumes, and allows the exhaust The overall configuration of the range hood is simpler

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