Air outlet hood for range hood

Abstract

The invention discloses an air outlet hood for a range hood. The air outlet hood comprises a hood body and a check valve plate assembly arranged in the hood body. The air outlet hood is characterized in that: the check valve plate assembly comprises an integrally formed circular check valve plate; the middle part of the check valve plate is equipped with axle hole, and the lower surface of the check valve plate is symmetrically provided with connecting grooves relatively with the axle hole which are thinner than the peripheral part; and the periphery of the check valve plate is jointed with the inside wall line plane of the hood body. Moreover, the air outlet hood can be provided with an anti-sticking driving device, so that the air outlet hood can prevent reverse smoke and sticking and ensure normal operation of the range hood.

Description

technical field [0001] The invention relates to an air outlet cover for a range hood, in particular to an air outlet cover for a range hood which can prevent smoke falling and prevent sticking. Background technique [0002] At present, the oil fume exhaust outlets of the kitchens of the building residents are all connected to a smoke exhaust channel that runs through from top to bottom. In order to prevent the smoke from falling back and returning to the smell, a non-return valve is generally installed at the exhaust port of the range hood. [0003] There are two kinds of check valves commonly used at present, one is a single-piece valve plate structure, and a single-piece valve plate is hinged on the sealing port of the valve seat. When the range hood is not working, the single-piece valve plate on the sealing port is closed, thereby preventing The oily fumes or odors in the common flue are reversed. However, the use of this single-piece valve plate structure has the follow...

AI Technical Summary

Problems solved by technology

[0003] There are two kinds of check valves commonly used at present, one is a single-piece valve plate structure, and a single-piece valve plate is hinged on the sealing port of the valve seat. When the range hood is not working, the single-piece valve plate on the sealing port is closed, thereby preventing The oily fumes or odors in the common flue are reversed. However, the use of this single-piece valve plate structure has the following disadvantages: When the range hood is working, the valve plate cannot be fully opened, which will cause resistance to the exhaust of the range hood; the negative pressure of the flue When it is too large, the valve plate closes slowly and does not close tightly, which affects the sealing effect

[0004] The other is a double valve plate structure, which opens or closes the check valve by rotating around a common shaft or different shafts in the middle of the air outlet hood. However, with this double valve plate structure, the connection between the two valve plates It cannot be completely sealed, and there is a gap in the middle, especially the commonly used valve plate is generally made of plastic. When the deformation is large, the gap will be larger, and it cannot effectively prevent the smoke from falling.

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