JPS608586Y2 - Air volume adjustment mechanism in the ventilation path - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an air volume adjustment mechanism in a ventilation passage.

Conventionally, roof ventilators and air conditioning equipment installed on trucks and buses have a structure that allows outside air to flow in by simply opening and closing a lid installed on the roof or part of the vehicle body, and others have a structure that allows outside air to flow in by simply opening and closing a lid installed on the roof or part of the vehicle body. Some models have a structure that adjusts the inflow air volume, but with the former, when the lid is open, a large amount of outside air flows in at once in the case of an air conditioner, or in proportion to the driving speed in the case of a vehicle. In the latter case, even if the air volume can be adjusted, it is mechanically complicated and requires a lot of effort to assemble.

This invention uses the pressure of the wind itself to automatically control the volume of air passing through the roof ventilators of automobiles, trains, and other vehicles, as well as the ventilation ducts of air conditioners installed in buildings, chemical equipment, etc. This idea is aimed at making quantitative adjustments.

In the present invention, blades 2 aligned parallel to the direction of wind movement in the ventilation path 1 and the direction of movement of the wind in the ventilation path 1 are used to provide ventilation at the end edge 2a of the ventilation path 1 on the gas outflow side or the gas inflow side. An elastic body 4 is interposed between the blade 2 and the wall surface 3a forming the ventilation path 1 and has elasticity in the direction of pulling the blade 2 toward the wall surface 3a. It is what it is.

Embodiment (1) of the present invention will be explained with reference to FIG. 1 and FIG. parallel to the upper and lower wall surfaces 3a, 3a, and close to and facing the walls 3a, 3a, respectively, and the end edge 2a of the blade 2 on the gas outflow side of the ventilation passage 1 is rotatable around the wall surface 3a by a shaft 5. To support.

Reference numeral 4 denotes a spring which is an elastic body having elasticity in the direction of pulling the blade 2 toward the wall surface 3a, and one end 4a is connected to the back surface 2C of the blade 2.
The other end 4b is fixed to the wall surface 3a.

The pair of blades 2, 2 are attached to the left and right walls 3 inside the ventilation pipe 3.
b, 3b so as to be rotatable, or may be provided vertically or horizontally facing the opening on the wind inflow side of the ventilation tube 3.

Further, the other end 4b of the spring 4, which is an elastic body, can be made to protrude outside through a hole 3c formed in the ventilation tube 3 and fixed to a mechanical component provided on the outer periphery of the ventilation tube 3, as shown in FIG. be.

Since the present invention is constructed as described above, the wind entering from the opening of the ventilation pipe 3 passes through the ventilation passage 1, but when the wind speed is low, the wind passes through the surface 2a of the blade 2 and is generated. Since the wind pressure is smaller than the elasticity of the spring 4, which is an elastic body, the blade 2 remains close to the wall surface 3a of the ventilation tube 3 due to the elasticity of the spring 4. However, as the wind speed increases, the blade 2 The wind pressure increases in proportion to the wind speed, and when the blade 2 begins to move away from the wall and reaches a certain angle, the wind pressure overcomes the elasticity of the spring 4, and the blade 2 resists the elasticity and moves toward the outflow side of the wind around the shaft 5. Since the rotation blocks the ventilation path 1, the cross-sectional area inside the ventilation tube 3 that allows ventilation of the ventilation path 1 is gradually reduced, and the air volume inside the ventilation tube 3 on the outflow side of the location where the blade 2 is installed is reduced. decreases.

As the speed of the wind flowing in from the inflow side opening of the ventilation tube 3 decreases, the wind pressure generated on the blades 2 also decreases, and the blades 2 gradually rotate toward the wall surface 3a side due to the elasticity of the spring 4 and open the ventilation path 1. The cross-sectional area of ventilation gradually expands.

Note that when there is an edge 2a on the inflow side as shown in Fig. 5, only the lift force generated on the blade is used, and wind pressure cannot be used, so the adjustment range of the air volume is limited, but it is the same as the above explanation. .

Therefore, according to the present invention, when the wind flowing into the ventilation passage in the ventilation tube passes through the attachment point of the blade, the lift force generated on the blade increases or decreases depending on the wind speed, and changes in wind pressure and lift force and elastic body As the blade rotates due to the elasticity of the blade, the cross-sectional area of the ventilation path that can be vented changes.
It is possible to automatically adjust the air volume and maintain it at a nearly constant level, expanding the scope of its use as an automatic air volume adjustment mechanism, and it is generated by the passing wind without using electrical energy etc. to open and close the blades. Since it uses the lifting force itself, it is useful for energy saving, and the structure is simple and easy to manufacture.

[Brief explanation of drawings]

The figures show embodiments of the present invention. Fig. 1 is a front view of Embodiment 1, in which a pair of vanes are provided with a pair of vanes curved in a convex manner at the top and bottom of the ventilation pipe and with the axis facing the gas outflow side, and Fig. 2 1 is a vertical sectional view of the connections in FIG. 1, FIG. 3 is a vertical sectional side view showing the operating state of the blade in Example 1, and FIG. 4 is a vertical sectional view of the connections shown in FIG. FIG. 5 is a cross-sectional view of the structure in which the shaft of the blade is provided on the gas inflow side. Code = 1...Ventilation path, 2...Blade, 2
a...Edge, 2b...Surface, 2c...
...Back side, 3...Ventilator, 3a...
・Wall surface (top and bottom), 3b...Wall surface (left and right), 3c
...hole, 4 ... elastic body (spring)
, 4a... one end, 4b... other end, 5.
·····shaft.

Claims (3)

[Scope of utility model registration request] (1) Blades 2 aligned parallel to the direction of wind movement in the ventilation path 1
is rotatably supported in the ventilation passage 1 at the edge 2a on the gas outflow side or the gas inflow side of the ventilation passage 1, and between the blade 2 and the wall surface 3a forming the ventilation passage 1, An air volume adjustment mechanism in a ventilation passage characterized by interposing an elastic body 4 having elasticity in the direction of pulling the blade 2 toward the wall surface 3a. (2) Utility model registration In the air volume adjustment mechanism in the ventilation passage according to Claim 1, the blades 2 are curved in a convex shape. (3) Utility model registration In the air volume adjustment mechanism in the ventilation passage described in Claims 1 and 2, the blade 2 is provided so as to be rotatable up and down or to the left and right of the ventilation passage 1.