an exhaust fan

Abstract

The invention discloses an exhaust fan, which comprises a motor, blades driven by the motor, an air intake channel and an exhaust channel connected with the blades, the exhaust channel is cylindrical, and two symmetrical non-return channels are arranged at the end of the exhaust channel The valve, the check valve is a rectangular plate, the check valve has two long sides and two short sides, the check valve has a gradually changing width from one short side to the other short side along the direction of the long side, and the check valve has two long sides and two short sides. The thicker short side on the return valve is the thick short side, and the thinner short side on the check valve is the thinner short side. There are two horizontal axes on the side of the long side on the check valve, and the horizontal axis is set The position is close to the thick and short side, and the horizontal axis is connected with the end of the exhaust passage; the exhaust start is a flat section, and the exhaust end is two symmetrical oblique sections. The exhaust end has two highest points, and the exhaust end is provided with two a bump, the bump is located at the highest point. The invention provides an exhaust fan capable of changing the exhaust flow direction, reducing noise nuisance, high product life and high reliability.

Description

technical field [0001] The invention relates to the field of exhaust fans, in particular to an exhaust fan that can change the exhaust flow direction, reduce noise nuisance, and has high product life and high reliability. Background technique [0002] With the pace of the urbanization process, tall buildings have sprung up one after another, and people's quality of life has been improving day by day; however, people have also found some new problems in the urban life of high-rise buildings. In some house structures, the window of the toilet of one's own will face the balcony or bedroom window of the neighbor, but the exhaust flow direction of the exhaust fans sold on the market is blown along the direction of the window of the toilet, that is, the exhaust fan of the toilet of one's own will blow the exhaust The air blows directly to the neighbor's balcony or bedroom window, which is not conducive to maintaining a good neighborhood relationship. It is urgent to develop a new ...

AI Technical Summary

Problems solved by technology

In some house structures, the window of the toilet of one's own will face the balcony or bedroom window of the neighbor, but the exhaust flow direction of the exhaust fans sold on the market is blown along the direction of the window of the toilet, that is, the exhaust fan of the toilet of one's own will blow the exhaust The air blows directly to the neighbor's balcony or bedroom window, which is not conducive to maintaining a good neighborhood relationship. It is urgent to develop a new type of exhaust fan that can change the exhaust flow direction of the exhaust fan.

[0003] Exhaust fans on the market have check valves, such as figure 1 , the shape of the check valve is the same as that of the end of the exhaust passage, and the end of the exhaust passage is a flat cut surface. When the exhaust fan stops, the check valve is closed and completely covers the end of the exhaust passage. Smaller than the inner diameter of the end of the exhaust duct, when the exhaust fan starts, the check valve opens at a certain angle, although it can change the exhaust flow direction of the exhaust fan to a certain extent, but because the check valve is circular and its diameter is equal to or slightly It is smaller than the inner diameter of the end of the exhaust duct, so it is impossible to change the wind blown from the end of the blade. That is, although this type of exhaust fan can reduce the problem of direct exhaust blowing to a certain extent, it still cannot completely solve the problem of toilet exhaust blowing directly to neighbors. The problem

[0004] In addition, due to the strong wind at high places, the toilets in high-rise buildings will be disturbed by greater wind force. The check valve of the toilet exhaust fan, when the exhaust fan stops, the check valve is closed and completely covers the end of the exhaust duct. It can withstand the wind with a small wind force, and to a certain extent, it ensures that the external wind will not be blown back into the room through the exhaust duct; however, because the check valve is circular and its diameter is slightly smaller There is a gap between the return valve and the end of the exhaust duct. When encountering a strong wind, the wind can easily penetrate into the gap, and then blow the check valve so that the check valve opens at a certain angle, and then close the check valve. The return valve is blown back to the closed state, and this reciprocating cycle not only causes the problem that the outside wind can be blown into the room, but also causes the check valve to continuously reciprocate and hit the end surface of the exhaust duct to make disturbing noise; The noise troubles, and the reciprocating impact check valve will also cause the problem of chipping and falling off after being impacted many times

Images