JP2010276251A - Rotation type roof ventilator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that, for the rotating power of a conventional rotation type ventilator, the wind pressure of outside air blown in from an upwind opening corresponding to 1/4 of the overall outer periphery of an outer periphery multiblade fan or a fan similar to the multiblade fan is mainly used, and thus, since wind and rain blown in from the upwind opening is discharged by the other 3/4 portion of the fan, this may lower atmospheric pressure in a building depending on the structure and use state of the building and cause wind and rain to flow back to the inside of the building in the case of rain. <P>SOLUTION: Two types of large and small multiblade fans each having one central shaft therein are built in the rotation type ventilator. The multiblade fans are arranged leaving a small interval so as to be rotated freely, and shapes of rotating blades and the orientation of a vortex forming the blades are set to be reverse to each other. Thus, while the multiblade fans are rotated reversely to each other, air in building is merged and discharged to the same direction. As a result, a backflow of wind and rain to the inside of the building can be completely prevented and an air discharge capacity can be drastically increased. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a rotary roof ventilator that is installed on a building roof to improve the efficiency of natural ventilation.

There are four types of rooftop roof ventilators that use conventional natural wind power.

A fixed type ventilator whose head does not move.

A directional rotating ventilator where the opening of the ventilator head is always facing downwind by wind power.

A rotary ventilator with the function of ventilating while the head of the ventilator is rotated by wind power.

There is a continuous ventilator that extends the fixed ventilator long in one direction.

The limits of ventilation volume of various conventional natural ventilation ventilators are different in the flow coefficient (in-machine resistance), but the general criteria for evaluation is the structure of the narrowest torso in the ventilator passage of the exhaust gas. The cross-sectional area is the standard.

The ventilation capacity of a natural ventilation ventilator varies depending on the cross-sectional area of the trunk, the shape of the building to be installed, and the building environment, in addition to the in-flight resistance of the ventilator. Specifically, the ventilation air intake for the building to be installed To the exhaust vent of the roof ventilator installed on the roof of the building, the temperature difference between the air inside the building and the outside air, and the external wind speed around the installed ventilator greatly affect the improvement of natural ventilation performance.

The problem that is likely to occur in any ventilator is that if there is not enough consideration in the structural design of the building, it is not possible to guide the efficient discharge of wind and rain that has entered through the ventilator opening during wind and rain. Or, the problem arises that the exhaust performance is sacrificed only in the prevention of wind and rain intrusion.

Japanese Patent Laid-Open No. 5-180477 JP-A-2005-121260 Japanese Utility Model Sho 53-114147

The exhaust capability of the conventional natural ventilation ventilators described above has limitations in proportion to the opening area of the ventilator body even if the in-machine resistance of each part in the ventilator is ignored, and the exhaust capability is limited.

Furthermore, due to problems with the internal structure of the ventilator, there is a risk of wind and rain splashes entering the building when it is raining outside.

The present invention is intended to solve the structural problems of conventional natural ventilation ventilators, adopts a sirocco fan structure utilizing natural wind power, enhances exhaust capacity, and from the gap of the ventilator during wind and rain The purpose is to further enhance the ventilation performance of the natural ventilation ventilator so that wind and rain do not flow back into the building.

In order to achieve the solution of the above-mentioned [0011], the present invention comprises a sirocco fan device that rotates by utilizing the wind force of the outside air in order to increase the exhaust capacity more than a normal natural ventilation roof ventilator installed on the roof, The exhaust capacity is used by adding to the natural ventilation capacity.

Further, as a means for solving the problem of [0012], in order to prevent the risk of wind and rain entering the building, a sirocco fan that rotates and exhausts is installed on the outer periphery of the ventilator head, and the inner diameter of the sirocco fan on the outer periphery thereof A small sirocco fan fan is built in with a small gap so as not to contact the fan. However, the inner small sirocco fan is opposite in rotation direction to the outer sirocco fan because the direction of the blades and the shape of the vortex are reversed, but the exhaust air is discharged in the same direction as the outer sirocco fan. Therefore, the wind pressure of the exhaust airflow from the outer peripheral sirocco fan increases the suction and exhaust force of the air in the building of the small sirocco fan, and both the exhaust effect of natural ventilation described in the background condition of this application and the exhaust effect using wind power are combined. Then, the air in the building is discharged in the same direction.

The small sirocco fan fan built in the outer peripheral sirocco fan has a positive blocking effect against the backflow of wind and rain, because the vortex shape and blade shape and rotation direction are opposite to the blades of the outer peripheral sirocco fan, Since the discharge airflow is also in the same direction, they are integrated with each other to increase discharge efficiency.

As described above, the outer peripheral sirocco fan is discharged to the outside through the gap between the blades of the small sirocco fan that rotates in reverse while rotating at the outside air pressure.

The rotary roof ventilator of the present invention has a high-efficiency exhaust performance in addition to the exhaust performance of a peripheral sirocco fan that is rotated by natural wind power, in addition to the ventilation performance of a normal natural ventilation ventilator.

The outer peripheral sirocco fan has a windward opening that occupies ¼ of the rotating outer peripheral blade area as a wind inlet, and the outside air that is taken in generates rotational force in the outer peripheral sirocco fan. The outlet of the air is 3 times larger than the outside air intake area, and a slightly smaller sirocco fan that rotates in the reverse direction is built inside the outer peripheral sirocco fan, so the outside air pressure from the invaded windward area is The sirocco fan and the inner small sirocco fan are combined with each other, and are combined together to further improve the performance of rainwater infiltration and ventilation efficiency as the suction and exhaust force of the air in the building.

The rotary ventilator of the present invention has a ventilation power as a natural ventilation device due to the temperature difference between the inside and outside of the building installed even when the outside air is in no wind, and the height between the outside air intake of the installed building and the ventilator exhaust port. The sirocco fan on the outer periphery rotates with exhaust airflow even in the absence of wind and continues to exhibit natural ventilation.

The rotary roof ventilator of the present invention is used by being installed on the roof of a building or the like, but in use, it has no noise, no vibration, no electric power, and has a very long service life.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.

FIG. 1 is a front view of a rotary roof ventilator according to the present invention, FIG. 2 is a cross-sectional view of FIG. 1 vertically cut from above, and FIG. 3 is a cross-sectional view taken along line AA in FIG.

1, 2, and 3, reference numeral 1 denotes one of the blades of the outer peripheral sirocco fan. Reference numeral 2 denotes one of the blades of a small sirocco fan that rotates in the opposite direction opposite to 1 inside the outer sirocco fan 1.

Reference numeral 3 denotes a head cover according to the present invention, which is connected and fixed to the upper end of the blade 1 of the outer peripheral sirocco fan as shown in FIG.

Reference numeral 4 denotes a blow prevention plate which is connected and fixed to the lower end of 1 and is a cover for blocking the blowing of external wind and rain.

Reference numeral 5 denotes a base, and the inside thereof is connected and fixed by a reinforcing steel frame 6 and an arm 7 as shown in FIG. 2, and a rotating central shaft 8 is supported by 9, 10 bearings.

Reference numeral 17 denotes an arm which is fixed to the lower part of 1 and 4.

Reference numeral 16 denotes a vacuum prevention plate fixed to 3.

11 secures the arm 17 and the central shaft 8.

The peripheral portion of the vacuum prevention plate 16 is fixed to 3 and the central portion is fixed to the central shafts 8 and 14.

A nut 15 is fixed to the upper end of the threaded central shaft 8 and the center of the head cover 3.

Reference numerals 18 and 19 denote arms, which are held by bearings so as to further freely rotate at positions 12 and 13 with respect to the rotating central shaft 8.

FIG. 3 is a view showing the shape of the sirocco fans 1 and 2 when the sirocco fans 1 and 2 are viewed from the upper surface by cutting FIG. 1 along the arrow AA, and 8 is a central axis.

Front view of a rotary roof ventilator showing an embodiment of the present invention 1 is a longitudinal sectional view of FIG. 1 is a cross-sectional view taken along the line AA in FIG.

1. 2. Sirocco fan blades that rotate in the opposite direction of 1 inside the sirocco fan blades 2.1 on the outer periphery of the main body The head cover is fixed to 1 and rotated together.
4.1 Outside air blowing prevention plate connected to the lower end of 4.1.
5). Base 6. 6. Reinforced steel frame in base 5 7. Supports a central shaft 8 that rotates by connecting 6 and a bearing 10 with a fixed arm. A rotating central shaft, supported by 9 and 10 bearings, supports 1 and 2 opposite rotating sirocco fans.

Claims (3)

In a rotary ventilator that utilizes natural wind power, the outer periphery of the rotating head has a sirocco fan that rotates by receiving the outside air pressure, and the central axis of the rotating portion has a bearing that rotates freely, and A sirocco fan with a smaller outer diameter that does not touch the outer peripheral sirocco fan, sharing the central axis of rotation of the outer peripheral sirocco fan. The small sirocco fan has a rotating blade shape and a spiral direction opposite to each other, and the rotation direction is also free to rotate in the opposite direction. A rotary roof ventilator that prevents backflow of outside air and rain. Claim 1. The rotary roof ventilator described above, wherein the blade shape of the sirocco fan at the outer periphery or inside is changed separately or both together to a multi-blade fan having a blade shape different from that of the sirocco fan. Claim 1 in the ventilator. Within the range of Claim 1. And claim 2. The sirocco fan or the multi-blade fan on the outer periphery of the head that rotates under the wind pressure of the outside in the rotary ventilator in FIG. In the case of claim 1. And claim 2. Within the scope of claims.

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