CROSS-REFERENCE TO RELATED APPLICATION

This application is a 371 of international application of PCT application serial no. PCT/CN2019/073377, filed on Jan. 28, 2019, which claims the priority benefit of China application no. 201820170365.2, filed on Jan. 31, 2018. The entirety of each of the above mentioned patent applications is hereby incorporated by reference herein and made a part of this specification.

BACKGROUND

Technical Field

The present invention relates to range hoods, and in particular to a wind outlet mechanism for a range hood.

Description of Related Art

Range hoods are classified into external-discharge range hoods and internal-circulation range hoods. For the internal-circulation range hoods, oil fume is purified by the range hoods and then discharged into the room, realizing the reuse of air.FIG. 1shows an existing wind outlet mechanism for internal-circulation range hoods, wherein a wind guide box5′ is arranged at a wind outlet of the range hood; the bottom of the wind guide box5′ is open and connected to the wind outlet of the range hood via a connecting pipe4′; wind outlet regions are provided at left and right ends of the wind guide box5′; and the wind outlet regions are opposite to the wind discharge holes20′ on a decorative cover2′. Air filtered by the internal-circulation range hood is blown out from a wind outlet hood, then divided into left and right air flows in the box after passing through the connecting pipe, and discharged from the wind discharge holes on the decorative hood.

The wind outlet mechanism is based on the right-angle tee mechanism. Wind from the wind outlet turns at a right angle when being blown upward to the wind guide box. Meanwhile, due to the limited spatial structure in the wind guide box, there is high wind discharge resistance in the connecting pipe, and the wind is directly blown onto the inner top surface of the air guide box to result in local noise. Although the existing wind guide box is designed to discharge wind from left and right sides, due to a high wind speed, the air flow is actually refracted on the inner top surface of the wind guide box, resulting in downward air flowing which affects the user's experience. Also, turbulent interference will occur in cookers with open flame.

SUMMARY

An object of the present invention is to provide a wind outlet mechanism for a range hood, with low noise.

For achieving the above object, the wind outlet mechanism for a range hood, comprises a wind outlet, a decorative cover having a plurality of wind discharge holes, surrounding the wind outlet, a flow guide member disposed inside the decorative cover. The flow guide member has a cambered flow guide surface opposite to and protruding toward the wind outlet.

Preferably, the flow guide surface is shaped as a circular arc, so that an air flow blown from the wind outlet from the bottom up can be guided to a horizontal direction by the flow guide member and then discharged from the wind discharge holes on the decorative cover, thereby reducing direct plane reflection.

Preferably, an adsorption medium layer for adsorbing fume is disposed on the flow guide surface. The adsorption medium layer can adsorb part of residual fume discharged from the wind outlet. Moreover, since there are many voids on the surface of the adsorption medium, the overall noise generated when discharging wind can be further reduced by decreasing the speed of air passing through the surface of the adsorption medium.

Preferably, the flow guide member is a circular plate, and the flow guide surface is formed at a bottom side of the flow guide member and protrudes downward.

To conveniently mount the flow guide member, preferably, a mounting bracket for the flow guide member be mounted above a side wall of the wind outlet is disposed between the wind outlet and the flow guide member inside the decorative cover.

The mounting bracket may be implemented specifically in various ways. Preferably, the mounting bracket comprises at least two connecting poles having two ends, one end of each connecting pole is fixedly connected with the flow guide member and the other end each connecting pole is fixedly connected with the end of the wind pipe.

To realize more stable connection between the flow guide member and the mounting bracket, preferably, the flow guide member has at least two mounting ears protruding from a circular edge of the flow guide member at intervals, and each mounting ear is connected with a corresponding connecting pole.

Preferably, the decorative cover has an upper portion, and the wind discharge holes are located at the upper portion of the decorative cover, and the flow guide member is located corresponding to a position of the wind discharge holes, therefore, it is convenient to discharge an air flow from the wind discharge holes.

Preferably, the decorative cover comprises a front side plate, a left side plate and a right side plate, each side plate has the wind discharge holes, and the wind discharge holes on each side plate are flush with each other.

Compared with the prior art, in the present invention, a flow guide member is arranged in the decorative cover, and the flow guide member has an arc-shaped flow guide surface opposite to the wind outlet. In this way, when an air flow is blown from the wind outlet to the flow guide surface from the bottom up, the flow guide surface can guide the air flow to another direction so that the air flow is discharged from the wind discharge holes on the decorative cover, thereby reducing direct plane reflection. Compared with the conventional wind outlet mechanisms, the wind outlet mechanism of the present invention is not obviously limited in space, and the internal space in the decorative cover can be fully utilized to provide a larger buffer region for discharging wind. Accordingly, the wind discharge resistance becomes low, the wind discharge rate at the wind discharge holes can be effectively reduced, and the noise is thus reduced.

