TWI620856B - Roof exhaust - Google Patents

Abstract

A roof exhaust device is mounted on a roof and coupled to a ventilation duct having an exhaust port, the exhaust device including a flow guiding seat, and a ventilation duct mounted to the ventilation duct a connecting unit, the flow guiding seat has a first guiding tube, and a first channel defined by the first guiding tube, the first channel has a first air inlet, and a diameter smaller than the An air outlet of the first air inlet, the air outlet of the air duct is between the air outlet and the first air inlet, and the exhaust device further includes a wind direction guide mounted on the air guiding seat . The cooperation of the aforementioned components allows the air inside the house to flow naturally and quickly to the outside to increase the exhaust efficiency.

Description

Roof exhaust

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an exhaust device, and more particularly to a roof exhaust device that is mounted on a roof and utilizes a natural airflow outside the house to allow air in the house to be discharged to the outside of the house.

In order to allow the air in the house to convect inside and outside the house, windows are usually opened on the walls of the building. However, the windows on the walls are limited by the conditions of the building itself, so that some buildings will be The roof is erected by a ventilator that can be rotated by the airflow outside the house. The conventional ventilator basically comprises a base mounted on the roof, and a rotatable blade swivel mounted on the base, the blade swivel having a plurality of blades disposed around a center of rotation. Each blade has a windward side and a leeward side. When the airflow is blown to the windward side of the blade of the blade swivel, the blade swivel can be pushed to rotate around the center of rotation, thereby achieving the purpose of exhausting the natural airflow outside the house.

Although the conventional ventilator has the advantages described above, it is conventional that the blades of the blade slewing are arranged around the center of rotation, so that no matter whether the airflow is blown from that direction toward the blade rotator, there are partial blades. The windward side and the leeward side of some of the blades will face the airflow. That is, the airflow blown to the windward side of some of the blades will drive the blade swivel to rotate, but the airflow blown to the leeward side of some of the blades will produce an opposite force, because the two forces will cancel each other out, actually There is not much airflow to drive the conventional ventilator to rotate, so the exhaust efficiency of the conventional ventilator is not ideal.

It is an object of the present invention to provide a roof exhaust that overcomes at least one of the disadvantages of the prior art.

The roof exhaust of the present invention is mounted on a roof and is coupled to a ventilation duct having an exhaust port. The venting device includes a flow guiding seat, and a connecting unit rotatably mounting the flow guiding seat on the ventilation conduit, the flow guiding seat has a first guiding tube, and a first guiding flow a first channel defined by the tube, the first channel has an air inlet section, and an air outlet section that is connected to the air inlet section and has a narrowing cross-sectional area, the air inlet section has a first air inlet port, and the air outlet section The air outlet is spaced apart from the first air inlet and has a smaller diameter than the first air inlet. The air outlet of the air duct is between the air outlet and the first air inlet. The venting device further includes a wind direction guide mounted on the flow guiding seat.

The beneficial effect of the present invention is that the first channel having a change in sectional area is disposed on the first draft tube of the flow guiding seat, and the wind direction guiding member is mounted on the guiding seat, so that the indoor space can be made The air naturally and quickly flows outside the house and increases exhaust efficiency.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to Figures 1, 2, 3, an embodiment of the venting apparatus of the present invention is erected outside a building 1 and is connected to a venting duct 2 having a roof 11 and a venting duct 2 having a Defining a wall 21 of the air duct 20, the top end of the tube wall 21 projects out of the roof 11, the air duct 20 has an exhaust port 201 protruding from the roof 11, but in design, the row The port 201 is not necessary to protrude from the roof 11. The venting device includes a flow guiding seat 3, a connecting unit 4 rotatably mounted at the venting opening 201 of the venting duct 2, and a coupling unit 4 for restricting the rotation of the guiding seat 3. An angle-limiting angle limiting mechanism 5, and a wind direction guide 6 mounted on the flow guiding seat 3.

Referring to Figures 1, 3 and 4, the flow guiding seat 3 has a first guiding tube 31, a first passage 32 defined by the first guiding tube 31, two and the first guiding tube 31. A second draft tube 33 connected to the opposite side and two second passages 34 defined by the second draft tubes 33, respectively. The first draft tube 31 and the second draft tubes 33 all extend along an intake direction 30. The first passage 32 has a gas inlet section 321 having a uniform cross-sectional area, and a section and the gas inlet section 321 An air outlet section 322 is connected and the cross-sectional area is gradually reduced. The air inlet section 321 has a first air inlet 324 having an air outlet 325 spaced from the first air inlet 324 along the air intake direction 30.

The first draft tube 31 has a main ring wall 310 defining the first passage 32, a set ring wall 311 perpendicular to the main ring wall 310 and a top end extending into the first passage 32, and a An air flow guiding plate 312 having a first ring wall portion 314 having a uniform diameter and two communication ports 313 disposed on the first ring wall portion 314, and the set of ring walls 311 is A hollow annular tube body is disposed about an axis of rotation 35. The air flow guiding plate 312 substantially corresponds to the first ring wall portion 314 of the first draft tube 31, and between the set ring wall 311 and the first air inlet 324 of the first channel 32, The airflow riser plate 312 has a high point 315 adjacent to the set of ring walls 311, and a low point 316 adjacent to the first air inlet 324, that is, the airflow riser plate 312 is the first air inlet 324. The direction gradually increases toward the set of ring walls 311. The height h1 of the high point 315 is equal to or higher than the height h2, the height h1 and the height h2 of the set of ring walls 311 protruding into the first passage 32. It can be 10~150mm. In addition, the height 315 is a distance h3 between the set of ring walls 311. The spacing h3 depends on the needs of the assembly site, usually between 50 and 500 cm, and the airflow is led. The length h4 of the plate 312 is approximately 1/2 to 1/3 of the length h5 of the air inlet section 321 of the first passage 32. In this embodiment, the length h4, the height h1, and the assembly position of the airflow riser plate 312 are limited. In addition to achieving a better flow guiding effect, the raindrop flow can be quickly carried over to prevent moisture from passing through the set of ring walls 311. Enter the air duct 20.

Each of the second draft tubes 33 has a second ring wall portion 331 having a uniform pipe diameter, and a reduced diameter narrowing portion 332, and the second ring wall portion 331 of each of the second draft tubes 33 The outer diameter is the same, and the outer diameter of each of the second ring wall portions 331 is about 1/5 to 1/2 of the outer diameter of the first ring wall portion 314, and the number of the second draft tubes 33 is not To be limited to the two disclosed in the embodiments, they may be one or several. Each of the second passages 34 has a second air inlet 341 corresponding to the second ring wall portion 331 and a converging end 342 for guiding the air flow to one of the communication ports 313 of the first draft tube 31. The second air inlet 341 of each of the second passages 34 is flush with the first air inlet 324 of the first passage 32 and symmetrically located on the opposite side of the first air inlet 324.

In addition, the cross-sectional shape of the first draft tube 31 and the second draft tube 33 in this embodiment is not particularly limited, and may be made into various types in addition to the circular tube disclosed in the embodiment. Shapes, such as squares, ovals, triangles, or polygons, etc.

The connecting unit 4 has a bearing 41 and two oil pots 42 for storing lubricating oil and installed in the first passage 32. The bearing 41 is fitted to the tube wall 21 of the ventilation duct 2 and the flow guiding seat. Between the set of ring walls 311 of the first draft tube 31, the baffle 3 can be rotated about the axis of rotation 35, and each of the oil pots 42 has a lubricating oil guide to the bearing 41. The oil guiding rope 421 is in the present embodiment, and the oil guiding rope 421 is made of a non-woven material. The oil pot 42 is preferably oriented toward the first air inlet 324 for ease of maintenance and replacement.

Referring to Figures 1, 4 and 5, the angle limiting mechanism 5 is used to limit the rotation angle of the flow guiding seat 3 to be less than 360 degrees, in order to prevent the air outlet 325 of the flow guiding seat 3 and the first air inlet. The 324 and the second air inlets 341 correspond to the north, that is, the north wind that avoids the cold in winter passes through the first passage 32 quickly, causing the convection to be too fast, so that the warm air inside the house is taken outside the house. The angle limiting mechanism 5 has an angle limiting member 51 mounted on the tube wall 21 of the ventilation duct 2, and a blocking member 52 mounted on the outside of the main annular wall 310 of the first guiding tube 31. The sheet 52 is rotatable with the flow guiding seat 3 and abuts against the angle limiting member 51 to limit the guiding of the flow guiding seat 3 only within a pivoting angle 53 which is less than 360 degrees. The wind direction guide 6 is in the form of a flow guiding fin, which is fixed on the main ring wall 310 of the first draft tube 31 and adjacent to the first air inlet 324 of the flow guiding seat 3.

Referring to Figures 3, 4 and 5, in the present embodiment, the exhaust device is mounted on the ventilation duct 2 and protrudes from the roof 11, the airflow outside the room will blow the guide seat 3 to rotate about the rotation axis 35, due to The wind direction guiding member 6 is disposed on the first draft tube 31 adjacent to the first air inlet port 324, which may cause asymmetry in the shape of the flow guiding seat 3, and therefore, when the airflow acts on the exhausting device, The flow guiding seat 3 of the exhaust device is blown by the air flow, and the end with less resistance will be located at the front end of the air flow, and the end with greater resistance will face the rear end of the air flow, that is, under the action of the air flow. The intake direction 30 of the flow guide 3 will be the same as the flow direction of the air flow.

When the airflow enters the first passage 32 from the first air inlet 324 of the flow guiding seat 3, and enters the corresponding second passage 34 by the second air inlets 341, respectively, entering the first passage 32 When the airflow enters the air outlet section 322 whose cross-sectional area is reduced, the suction force is generated due to the difference of the pressure difference, and the airflow entering the second passages 34 also enters the first passage 32, and passes through the first passage 32. Suction is also generated in the outlet section 322, and the suction force sucks out the air located in the air duct 20 of the ventilation duct 2, and thus achieves the purpose of utilizing the natural airflow outside to discharge the air inside the room.

When the north wind hits the flow guiding seat 3, although the flow guiding seat 3 may extend the air inlet direction 30 to the north-south direction due to the action of the air flow, the angle limiting mechanism 5 may limit the flow guiding seat 3 The yaw direction, so even in the winter, the cold north wind does not enter the first passage 32 through the first air inlet 324, the second air inlet 341 or the air outlet 325, and then enters the ventilation duct 2 In the interior of the house, the angle limiting mechanism 5 of the present embodiment can prevent north wind from entering the house through the first passage 32.

It can be seen from the above description that the exhaust device of the present invention can utilize the natural airflow to achieve the purpose of discharging the indoor air. In the process of the airflow passing through the deflector 3, the intake direction 30 of the deflector 3 is substantially parallel to The direction of the air flow, therefore, the gas can enter the first air inlet 324 and the second air inlet 341 unimpeded, and finally discharged from the air outlet 325 of the flow guiding seat 3, that is, compared with the conventional ventilator, The present invention can indeed achieve a better exhaust effect with reduced drag. In addition, the oil pots 42 installed in the first passage 32 of the flow guiding seat 3 are not only novel in structure, but also can be automatically assembled by using the oil guiding rope 421 of each oil pot 42. The effect of the oil supply allows the flow guiding seat 3 to maintain a smooth rotation for a long time to improve the service life and smooth running.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the simple equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still Within the scope of the invention patent.

1‧‧‧Buildings
11‧‧‧ Roof
2‧‧‧ ventilation duct
20‧‧‧air guide
201‧‧‧Exhaust port
21‧‧‧ wall
3‧‧‧Guide
30‧‧‧Intake direction
31‧‧‧First draft tube
310‧‧‧Main ring wall
311‧‧‧Group ring wall
312‧‧‧Air guide plate
313‧‧‧Connected
314‧‧‧ First ring wall
315‧‧‧ high point
316‧‧‧ low
32‧‧‧First Passage
321‧‧‧Inlet section
322‧‧‧Outlet section
324‧‧‧ first air inlet
325‧‧‧ gas outlet
33‧‧‧Second guide tube
331‧‧‧ Second ring wall
332‧‧‧Shrinking
34‧‧‧second channel
341‧‧‧second air inlet
342‧‧‧ Converging end
35‧‧‧Rotation axis
4‧‧‧ Connection unit
41‧‧‧ bearing
42‧‧‧ oil pot
421‧‧‧oil rope
5‧‧‧ Angle Limiting Agency
51‧‧‧Angle limiter
52‧‧‧ §
53‧‧‧ pivot angle
6‧‧‧Wind direction guide
H1‧‧‧ Height
H2‧‧‧ height
H3‧‧‧ spacing
H4‧‧‧ length
H5‧‧‧ length

Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: Figure 1 is an exploded perspective view of one embodiment of the venting apparatus of the present invention; Figure 3 is a longitudinal cross-sectional view of the embodiment; Figure 4 is a cross-sectional view taken along line 4-4 of Figure 2; and Figure 4 is a longitudinal cross-sectional view of the embodiment; Figure 5 is a cross-sectional view taken along line 5-5 of Figure 2.

Claims (8)

A roof exhaust device is mounted on a roof and coupled to a ventilation duct having an exhaust port, the roof exhaust device comprising: a flow guiding seat having a first draft tube, and a a first passage defined by the first draft tube, the first draft tube having a main annular wall defining the first passage, and a set ring extending from the main annular wall to the ventilation duct a wall, the first passage has an inlet section, and an outlet section that is coupled to the inlet section and has a cross-sectional area that gradually decreases. The inlet section has a first inlet port, and the outlet section has a first inlet port The direction is spaced from the first air inlet and the aperture is smaller than the air outlet of the first air inlet, the air outlet of the ventilation duct is between the air outlet and the first air inlet; a connecting unit, the guiding The seat is mounted on the ventilation duct so as to be rotatable about an axis of rotation, and has a bearing rotatably mounted on the ventilation duct of the flow guide seat, and at least one of the guide tubes is mounted The first channel and the oiler lubricating oil reservoir, the at least one guide oiler having a lubricating oil to the bearing guide wick; and a wind guide member, mounted on the guide base. The roof exhaust device of claim 1, wherein the main ring wall of the first draft tube has a communication port, and the communication port is between the first air inlet and the air outlet, and the guide The flow seat further has a second draft tube coupled in parallel with the first draft tube, and one defined by the second draft tube The second passage has a second air inlet and a converging end that communicates with the communication port of the first air duct. The roof exhaust device of claim 1, wherein the main ring wall of the first draft tube has two communication ports, and the communication port is between the first air inlet and the air outlet. The flow guiding seat further has two second guiding tubes connected in parallel with the first guiding tube, and two second channels respectively defined by the second guiding tubes, each of the second channels There is a second air inlet, and a converging end that communicates with one of the communication ports of the first draft tube. The roof exhaust device of claim 2 or claim 3, wherein a top end of the set of ring walls of the flow guiding seat projects into the first passage, and the first draft tube further has an air flow guide The riser plate is gradually raised from the direction of the first air inlet to the wall of the set of rings. The roof exhaust device of claim 4, wherein the airflow riser plate has a spacing from the set of ring walls, and the airflow riser plate has a high point adjacent to the set of ring walls, The height of the high point is equal to or higher than the height at which the wall of the set of rings protrudes into the first passage. The roof exhaust device of any one of claims 1 to 3, wherein the wind direction guide is in the form of a flow guiding fin fixed to the flow guiding seat adjacent to the first Inlet. The roof exhausting device of any one of claims 1 to 3, further comprising an angle limiting mechanism for restricting a pivoting angle of the flow guiding seat to less than 360 degrees. The roof exhaust device of claim 7, wherein the angle restricting mechanism There is an angle limiting member mounted on the ventilation duct, and a stop member mounted on the flow guiding seat and contiguous with the angle limiting member.