JPH0712833Y2 - Ventilation device for ventilation port - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a ventilation device for a ventilation port used on an outdoor wall surface for the purpose of eliminating indoor contaminated air. The present invention relates to a device that automatically changes according to the wind direction of the outside air to satisfactorily discharge even under strong wind.

[Conventional technology]

An exhaust vent with a hood as shown in Fig. 5 and 6 is usually used for the ventilation port that discharges indoor contaminated air to the outside through a duct etc. to prevent rain wind from blowing from the outside. -ing

However, this exhaust tool 1 has a substantially hemispherical shape in the front part of the lattice plate 2 having ventilation parts 2'provided in several steps on the front surface, and has an oval shape when viewed from the front in the lower half part of the bulging front surface. A hood body 4 having an opening 3 formed by punching out a similar hole is attached, and a ventilation port 8 is provided in a wall portion 7 by a collar 5 at the periphery of the lattice plate and a connecting cylinder 6 at the back of the collar. It is designed to be attached to.

[Problems to be solved by the invention]

By the way, in the above-mentioned conventional exhaust device, the hood body 4 is provided at the front part of the lattice plate 2 to prevent rainwater from entering. However, this hood body has a hemispherical outer shape and has an opening portion. 3 is formed in the lower half of the front surface of the hemispherical surface in a slanting downward direction, and a large number of ventilation parts 2 ′ arranged in parallel above and below the lattice plate are
The plate surface is formed by punching out the upper half part and bending the back part in a slanting manner so that the plate surface has a V-shaped cross-section at regular intervals in the vertical direction so that it can be exhausted forward obliquely. When the tool 1 receives the lateral wind of the arrow A in the drawing, a part of the lateral wind enters from the opening 3 to form a swirling flow of the arrow B in the hood body 4, and at the same time, a wind entrainment phenomenon occurs to cause the lattice plate. Not only does it hinder the exhaust from 2, but it also produces wind noise. It should be noted that a cross wind is likely to be generated as a wind along the wall surface of a building even if it is not particularly strong.

The object of the present invention is not only to eliminate such a harmful effect, but rather to positively enhance the exhaust gas by the cross wind to enhance the duct effect.

[Means for solving problems]

The ventilation device of the present invention has a substantially hemispherical shape, and a bulge portion is formed in the lower half portion of the front surface of the front surface of the hood body, and a grid located on the back portion of the hood body. A core rod having a rotation axis as a line connecting the central portions of the plates is axially supported in the space between the hood body and the lattice plate, and the left and right sides of the core rod in the space are parallel to the shaft center. In addition, a plurality of blade plates each formed with the gap therebetween at right angles to the lattice plate are arranged at appropriate intervals by the supporting bar, and the blade plate is kept in a hanging posture from a stationary state to an arbitrary left or right side. It is characterized in that it is rotated in the same direction as the center rod.

[Action]

According to the present invention, like the conventional one, the exhaust air from the lattice plate exhausted through the duct or the like is guided to the inner surface of the hemispherical shape of the hood body and exhausted to the outside through the opening provided in the front of the lower half portion. In addition, the presence of the hood body can prevent rain and wind from entering.However, in the present invention, when the wind from the lateral direction with respect to the front surface of the hood body is received, this crosswind is bypassed by the hood body. The negative wind pressure is generated laterally by the counter wind pressure of the hood body, and the negative pressure causes the exhaust gas from the lattice plate to direct the negative pressure to the front face of the lattice plate. The vane plate rotates along the wind direction, so that the exhaust is smoothly and favorably promoted.

〔Example〕

Next, the present invention will be described with reference to an embodiment. In FIGS. 1 to 4, reference numeral 11 denotes an exhaust device attached to the air outlet of the ventilation port, which is the same as the conventional exhaust device shown in FIGS. The exhaust tool has a substantially hemispherical shape in the front part of a lattice plate 12 provided with a large number of ventilation parts 12 ′ arranged in parallel vertically, and has a horizontally long oblong shape in the lower half part of the front surface of the swollen ridge when viewed from the front. Since the hood body 14 having the opening 13 is attached to the hood body, a connection tube 16 concentric with the hood body is provided on the back of the lattice plate 12 via the flange 15 at the periphery of the lattice plate. is there.

Reference numeral 20 denotes a space between the hood body and the lattice plate, with a rotation axis being a line connecting the center (b) of the bulged portion of the hood body 14 and the central portion (b) of the lattice plate 12. A plurality of vane plates 2 each having an appropriate interval on the left and right via a support bar 22 extending laterally on the core rod that is rotatably supported in the rod 21.
3, 23 are leveled in parallel with the core rod, and the clearances 23 'between the vane plates are leveled at right angles with the lattice plate 12 to be supported.
Each of the vane plates 23 has a main part so that the lower half part of the space 21 is located in the crocodile, and the left and right parts have the same weight so that each of them can be in a drooping posture in a natural state to maintain balance. Therefore, the unbalanced left and right wind pressures can be turned to the left or right together with the core rod. 24 indicates a reinforcing rod.

In the case of the above-mentioned configuration, the exhaust gas from the air outlet passes through the ventilation portion 12 'of the lattice plate 12 and is partially guided by the spherical inner surface of the hood body 14 and discharged to the outside through the opening portion 13. When the cross wind of the arrow C is received by the hood body 14 that blocks the exhaust air, the cross wind is partly diverted in the direction of the arrow D by the hood body, and a negative pressure is generated in the anti-wind pressure portion. At the same time that the exhaust gas is guided in the negative pressure direction, the vane plate 23 is rotated together with the core rod 20 so that the passage 23 'is oriented in the exhaust gas direction as shown by the chain line in FIG. As a result, the duct effect is enhanced to smoothly and satisfactorily exhaust the air.

[Effect of device]

According to the present invention, it is possible not only to eliminate the adverse effect of the swirling flow that obstructs the exhaust in the hood body due to the crosswind, but also to positively enhance the duct effect by the crosswind to satisfactorily exhaust the air and prevent the generation of unpleasant wind noise. Moreover, the provision of a slewing plate inside the hood can eliminate the harmful effects of birds nesting.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is FIG.
II-II line enlarged cross-sectional view, FIG. 3 is a front view of the main part showing the arrangement of the blade plate in relation to the hood body, FIG. 4 is a bottom view of the blade plate, and FIG. FIG. 6 and FIG. 6 are side views with the same portion broken. 12 is a lattice plate, 12 'is a passage part, 13 is an opening part, 14 is a hood body, 20 is a rod, 21 is a space, 23 is a blade plate, and 23' is a gap.

Claims (1)

[Scope of utility model registration request] 1. A hood body having a substantially hemispherical shape and having an opening formed in a lower half portion of a front surface of a bulged portion, and a center portion of the front garment and a lattice plate located on a back portion of the hood body. A core rod having a rotation axis as a line connecting the central portions is axially supported in a space between the hood body and the lattice plate, and the core rod is parallel to the left and right sides of the core rod in the space, In addition, a plurality of vanes are formed at right angles to the lattice plate with a gap therebetween, and the vanes are arranged at appropriate intervals by a supporting bar. A ventilating device for the ventilation outlet, characterized in that it is adapted to be rotated together with the core rod.