CN2263245Y - Check valve for kitchen ventilator - Google Patents

Abstract

The utility model relates to a check valve used for preventing the smoke gas of a smoke exhaust ventilator, composed of a valve seat and a valve sheet which is supported on the valve seat. Frustum-shaped smooth transition is adopted from the bottom surface of the valve seat to the supporting surface of the valve sheet. The utility model can effectively reduce the generation of turbulent flow and vortex flow, reduce the resistance force of smoke exhaust, enhance the purifying rate of the smoke exhaust ventilator, and reduce noise.

Description

The range hood safety check

The utility model relates to a kind of safety check that prevents that the range hood flue gas from flowing backwards.

Existing range hood safety check is loaded on the smoke-ejecting pipe of range hood, because the bottom surface of valve seat is to being that stepped shape is excessive between the valve block supporting surface, diameter dwindles suddenly, increase gas-flow resistance, and turbulent flow and eddy current appear, cause air displacement to reduce, influenced the exhaust effect of range hood, and produce bigger noise.

The purpose of this utility model is to carry out structural improvement at the above-mentioned defective of existing range hood safety check, to improve the smoke discharging effect of range hood, reduces noise.

The purpose of this utility model realizes in the following way: the safety check of range hood is made up of valve seat and the valve block that is supported on the valve seat, seamlessly transits to employing truncated cone shape between the valve block supporting surface in the bottom surface of valve seat.Like this, can avoid the generation of turbulent flow and eddy current, make the smoke evacuation resistance reduce to minimum, noise is reduced.

For further improving the performance of safety check, be preferably on the valve block to be provided with and prevent that valve block from opening the pillar of vibration about the back, keeping steady air current, and can further reduce noise.

Advantage of the present utility model is simple and reasonable, can reduce the smoke evacuation resistance of range hood effectively, improves purification ratio, and the noise can reduce range hood work the time.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the sectional view of valve seat;

Fig. 3 is the plan view of valve seat;

Fig. 4 is the structural representation of valve block;

Fig. 5 is the plan view of Fig. 4.

Below in conjunction with embodiment and accompanying drawing the utility model is further described.

With reference to accompanying drawing, this range hood safety check is made of valve seat 1, valve block 2, and valve block 2 has two, and the rotating shaft at its two ends directly is inserted in the rotary shaft hole 5 of valve seat 1 free to rotate.Bottom surface 3 to employing truncated cone shape between the valve seat supporting surface 4 at valve seat 1 seamlessly transits, and makes the smoke evacuation resistance reduce to minimum.At least 3 pillars 6 are set on valve block 2.When range hood was worked, valve block can be opened fully, vibration about avoiding again.On valve seat 1, also have oil-return groove 7, flow back to the passage of lubricating cup as the oil of smoke-ejecting pipe inner accumulated.

Claims (3)

1, a kind of range hood safety check is made up of valve seat (1) and the valve block (2) that is supported on the valve seat, it is characterized in that bottom surface (3) in valve seat (1) is to seamlessly transitting for truncated cone shape between the valve block supporting surface (4).

2, safety check according to claim 1 is characterized in that valve block (2) is provided with to prevent that valve block from opening the pillar (6) of back vibration.

3, safety check according to claim 2 is characterized in that at least 3 on pillar on the valve block (2).

Images