CN214533618U

CN214533618U - Roof fan

Info

Publication number: CN214533618U
Application number: CN202023164294.1U
Authority: CN
Inventors: 梁旭文
Original assignee: Guangzhou Yongjia Environmental Protection Equipment Co ltd
Current assignee: Guangzhou Yongjia Environmental Protection Equipment Co ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-10-29
Anticipated expiration: 2030-12-23

Abstract

The utility model provides a roof fan, which comprises a hood, an outer cylinder, a connecting seat, a motor and fan blades; the blast cap is of a conical structure, the center of the blast cap is upwards convex, and the edge of the blast cap is approximately horizontal; the outer cylinder is arranged below the blast cap; a gap is reserved between the outer cylinder and the blast cap; the connecting seat is arranged below the outer barrel; the connecting seat is partially hollow; the motor is arranged in the outer barrel and fixed on the connecting seat; the fan blades are connected with an output shaft of the motor. The utility model discloses an edge of its hood of roof fan is close the horizontally setting, can prevent effectively that "pneumatic nozzle" phenomenon from increasing ventilation efficiency. Simultaneously, the external diameter of hood increases, has the effect of sheltering from the rainwater and preventing other debris from getting into the fan inside.

Description

Roof fan

Technical Field

The utility model relates to a ventilation equipment technical field especially relates to a roof fan.

Background

The roof fan can be used for air exhaust and ventilation of the roof of a building, and is installed on the roof to accelerate the volatilization of hot air to achieve the effects of ventilation and cooling by utilizing the natural principle that indoor hot air flow rises and cold air falls.

The existing roof fan is installed on the roof of a house and used for exhausting air to the outside, and a hood is arranged for preventing rainwater and foreign matters from falling into the roof fan. Axial fan along the axial up exhaust wind take place 180 degrees after touchhing the hood turn backward flow, because the effect of centrifugal force, the air current can outwards squint, thereby the outside extruded effect appears in the runner, the air current mainly flows outdoor from the region near the hood wall, form "pneumatic nozzle" phenomenon, "nozzle" resistance and resistance coefficient can increase along with the increase of air current velocity of flow, consequently cause the air current to block, even increase axial fan pressure and power are adapted also can not effectively increase the amount of wind of roof fan, roof fan's ventilation efficiency has been reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned technical problem, solve "pneumatic nozzle" phenomenon, make ventilation efficiency increase, still have certain effect of keeping off the rain.

In order to achieve the purpose, the utility model provides a roof fan, which comprises a hood, an outer cylinder, a connecting seat, a motor and fan blades; the blast cap is of a conical structure, the center of the blast cap is upwards convex, and the edge of the blast cap is approximately horizontal; the outer cylinder is arranged below the blast cap; a gap is reserved between the outer cylinder and the blast cap; the connecting seat is arranged below the outer barrel; the connecting seat is partially hollow; the motor is arranged in the outer barrel and fixed on the connecting seat; the fan blades are connected with an output shaft of the motor.

Furthermore, the hood is in an obtuse-angle conical shape, and the center of the hood is in gentle arc transition with the edge of the hood.

Furthermore, the top of the outer barrel is provided with a plurality of extension rods, and the outer barrel is connected with the air cap through the extension rods.

Furthermore, the top of the extension rod is an inclined plane with a high inside and a low outside.

Further, the bottom of urceolus is equipped with the flange, the flange outward flange is outstanding for the urceolus to be equipped with a plurality of connecting holes, be used for connecting the connecting seat with fixed roof fan.

Further, the connecting seat comprises a plurality of external connecting sheets and internal connecting sheets, and the internal connecting sheets are used for fixing the motor; the outer connecting piece is connected with the inner connecting piece through a support rod, and the support rod is strip-shaped; every two branch connects respectively the tip of outer joint piece.

Further, the outer connecting piece is provided with a through hole, and the connecting seat is fixed in the flange through the connecting piece.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a roof fan, the edge of the hood is arranged close to the horizontal, which can effectively prevent the phenomenon of 'pneumatic nozzle' and increase the ventilation efficiency; simultaneously, the external diameter of hood increases, has the effect of sheltering from the rainwater and preventing other debris from getting into the fan inside.

Drawings

FIG. 1 is a perspective view of a roof fan

FIG. 2 is a cross-sectional view of a roof fan

FIG. 3 is an exploded view of a roof fan

FIG. 4 is a structural view of the connecting socket

In the figure: the fan comprises a hood 1, an outer cylinder 2, a connecting seat 3, a motor 4, fan blades 5, a flange 21, an extension rod 22, an outer connecting piece 31, an inner connecting piece 32, a support rod 33 and a through hole 311.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-4, a roof fan comprises a hood 1, an outer cylinder 2, a connecting seat 3, a motor 4 and fan blades 5; the hood 1 is of a conical structure, the center of the hood is upwards convex, and the edge of the hood is approximately horizontal. The outer cylinder 2 is arranged below the blast cap 1; a gap is reserved between the outer cylinder 2 and the blast cap 1 from top to bottom and is used as an air outlet; the connecting seat 3 is arranged below the outer barrel 2; the connecting seat 3 is partially hollow and serves as an air inlet; the motor 4 is arranged in the outer barrel 2 and fixed on the connecting seat 3; the fan blades 5 are connected with an output shaft of the motor 4.

The working principle is that when the motor 4 of the roof fan works, the fan blades 5 are driven to rotate, indoor air is rolled into the outer barrel 2 and then sent into the hood 1, and is discharged from the edge of the hood 1.

It is worth noting that downwardly extending's brim of a hat is established to traditional hood, produces "pneumatic nozzle" phenomenon easily, and the utility model discloses in, the edge of hood is close horizontally setting, and the air current is discharged by the hood edge, because the edge sets the level to, the air current can be close to horizontally discharge, prevents effectively "pneumatic nozzle" phenomenon, and exhaust resistance reduces greatly, and ventilation efficiency obtains effectively promoting.

Simultaneously, the external diameter of hood increases, has the effect of sheltering from the rainwater and preventing other debris from getting into the fan inside.

In this embodiment, as shown in the figure, the hood 1 is an obtuse-angle cone, and the center and the edge are in gentle arc transition, so that the exhaust resistance is further reduced, and the exhaust is smoother.

Further, the top of the outer cylinder 2 is provided with a plurality of extension rods 22, and the outer cylinder 2 is connected with the blast cap 1 through the extension rods.

Further, the top of the extension rod 22 is a slope with a high inside and a low outside, which helps to reduce the resistance of the exhaust, so that the exhaust is smoother.

Further, the bottom of the outer barrel 2 is provided with a flange 21, the outer edge of the flange 21 protrudes relative to the outer barrel 2, and a plurality of connecting holes are formed in the flange for connecting the connecting seat 3 and fixing the roof fan.

Further, the connecting base 3 comprises a plurality of external connecting pieces 31 and internal connecting pieces 32, and the internal connecting pieces 32 are used for fixing the motor 4; the outer connecting piece 31 is connected with the inner connecting piece 32 through a support rod 33, and the support rod 33 is in a strip shape; every two struts 33 are respectively connected with the end of the external connecting sheet 31.

Wherein, the supporting rod 33 and the external connecting sheet 31 are enclosed to form a hollow fan-shaped structure, which is beneficial to the air to be drawn into the outer cylinder.

Further, the outer connecting piece 31 is provided with a through hole 311 for fixing the connecting holder 3 to the flange 21 through a connecting member.

To sum up, the roof fan that this embodiment provided, and the utility model discloses in, the edge of hood is close the horizontally setting, and the air current is discharged by the hood edge, because the edge sets to the level, the air current can be close to horizontally discharge, effectively prevents "pneumatic nozzle" phenomenon, exhaust resistance greatly reduced, increase ventilation efficiency.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A roof fan comprises a hood, an outer barrel, a connecting seat, a motor and fan blades; it is characterized in that the preparation method is characterized in that,

the blast cap is of a conical structure, the center of the blast cap is upwards convex, and the edge of the blast cap is approximately horizontal;

the outer cylinder is arranged below the blast cap; a gap is reserved between the outer cylinder and the blast cap;

the connecting seat is arranged below the outer barrel; the connecting seat is partially hollow;

the motor is arranged in the outer barrel and fixed on the connecting seat;

the fan blades are connected with an output shaft of the motor.

2. The roof fan of claim 1, wherein the hood is obtuse-angle conical with a gently curved transition between the center and the edge.

3. The roof fan as claimed in claim 1, wherein a plurality of extension rods are provided on a top of the outer cylinder, and the outer cylinder and the hood are connected by the extension rods.

4. The roof fan of claim 3, wherein the top of the extension rod is a slope with a high inside and a low outside.

5. The roof fan as claimed in claim 1, wherein the outer barrel has a flange at a bottom thereof, an outer edge of the flange protruding from the outer barrel and having a plurality of connecting holes for connecting the connecting base and fixing the roof fan.

6. The roof fan of any one of claims 1-5, wherein the connection base comprises a plurality of external connection tabs and internal connection tabs, the internal connection tabs being configured to secure a motor; the outer connecting piece is connected with the inner connecting piece through a support rod, and the support rod is strip-shaped; every two branch connects respectively the tip of outer joint piece.

7. The roof fan of claim 6, wherein the outer connecting piece is provided with a through hole for fixing the connecting base to the flange by a connecting member.