Air discharging cover for range hood

Abstract

The invention discloses an air discharging cover for a range hood. The air discharging cover comprises a cover body and a check valve plate assembly arranged inside the cover body, wherein a fixing rod is arranged inside the cover body, a fixing hole is arranged in the middle of the fixing rod, the lower surface of the check valve plate assembly is connected with an anti-sticking connecting rod assembly comprising a positioning shaft and double blade connecting rod arms capable of rotating relative to the positioning shaft, and the upper end of the positioning shaft is fixed inside the fixinghole. The air discharging cover disclosed by the invention is not only anti-sticking, but can also prevent smoke from returning, thus guaranteeing 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] Currently commonly used check valves, one is a single valve plate structure, and the other is a double valve plate structure. However, the structures of these two check valves mostly only rely on the pressure difference between the inside and outside of the valve when the range hood is working. When the machine stops working, it only depends on the gravity of the valve plate itself to close. When the range hood is used for a lon...

AI Technical Summary

Problems solved by technology

When the range hood is used for a long time, the oil stain will stick to the valve plate, which will make it difficult to open the valve plate and cannot guarantee the normal operation of the range hood

A driving device on the valve has been developed to ensure the normal opening and closing of the valve plate. However, most of the driving devices currently used are electric, which not only requires additional energy, but also because it is an independent control driving device, it is easy to cause the opening and closing of the valve plate. The work of the range hood is not synchronized, and the normal operation of the range hood cannot be guaranteed

[0004] In addition, the above two valve plate structures also have certain problems

Single-piece valve plate structure, 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, thus preventing the reverse oil fume or odor in the shared flue. However, using this This single-piece valve plate structure has the following disadvantages: when the operating valve plate of the range hood is rotated and opened, the valve plate cannot be fully opened, which causes resistance to the exhaust of the range hood; when the negative pressure of the flue is large, the valve plate closes slowly and cannot be closed Strict, affect the sealing effect

[0005] The double-valve plate structure opens or closes the check valve by rotating around the 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 cannot be completely 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 is larger, and it cannot effectively prevent the smoke from falling

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