JPH0242847Y2 - - Google Patents

Description

[Detailed explanation of the idea] (b) Industrial application fields This invention relates to a roof snow prevention device.

(b) Conventional technology Conventionally, snow accumulation on roofs has been dealt with by manual snow removal work.

(c) Problems that the invention aims to solve However, this snow removal work is hard work and dangerous work at high places, and failure to do this work could result in damage to buildings.

(d) Means for solving the problem In this idea, a fan is installed above the roof to generate airflow in a substantially horizontal radial pattern, and the airflow is configured to prevent snow from accumulating on the roof. In addition, it is an object of the present invention to provide a snow accumulation prevention device for a roof, in which a large number of adjustable and rotatable guide vanes are arranged around the outer circumference of the fan, and the wind force distribution of the blown airflow can be adjusted by the guide vanes. be.

(E) Effect This device is suitable for use during snowfall, with a vertical width of approximately 1 m and a wind speed of approximately 1 m.
If there is a horizontal wind of 4m/sec, approximately in the wind direction.
They discovered that it is possible to form a snow-free area over a length of 4 m, and applied this discovery to prevent snow from accumulating on roofs. This prevents snow from accumulating on the roof by shifting the snow to the outside of the roof. Moreover, since the airflow is blown out horizontally and radially from the fan, it is possible to send the airflow to the entire area of the roof including the top. Therefore, it is possible to prevent snow from accumulating over the entire area of the roof.

Furthermore, by adjusting the guide vanes, the airflow from the fan can be made to have the optimum wind force distribution for preventing snow accumulation, and a sufficient snow accumulation prevention effect can be obtained with a minimum amount of power.

The optimal wind power distribution for preventing snow accumulation varies depending on the roof width and shape, but as mentioned above, since the wind power distribution of the airflow from the fan can be adjusted, it can be applied to various roof widths and shapes. The present invention can be applied to the roofs of

(F) Effects According to this invention, it is possible to obtain sufficient snow accumulation prevention effects over the entire roof area with a minimum amount of power, eliminating the need for heavy and dangerous snow removal work, and reducing damage to buildings. This has the effect of preventing

(G) Example The example of the present invention will be explained in detail based on the drawings.
A shows a building, in which a sirotsukko-type fan 3 rotated by a motor 2 is installed on the top of a substantially V-shaped roof 1, and an intake duct 4 of the fan 3 is suspended to near the floor 5 of the building. The fan 3 sucks the air inside the building A through the same duct 4,
A substantially radial horizontal blowout airflow 6 is generated above the roof 1 centered around a fan 3.

This Shirotsuko-type fan 3 connects the center of a substantially disc-shaped upper end plate 7 to the lower end of a rotating shaft hanging from a motor 2 disposed above, and a slight A large number of curved blades 8 are vertically arranged, and the lower ends of the blades 8 are respectively connected to the outer periphery of a disk-shaped lower end plate 10 having a circular notch 9 in the center, thereby forming the rotor of the fan 3. The circular notch 9 and the upper end of the suction duct 4 are brought close to each other, and air is sucked in from near the floor surface 5 at the lower end of the duct 4 using negative pressure generated by the rotation of the fan 3.

In particular, this fan 3 does not have a duct for blowing air, and is provided with a large number of guide vanes 11 surrounding the outer periphery of the vanes 8. This is to adjust the distribution of wind power blown out from the fan 3 in the radial and horizontal directions.

FIG. 4 is a plan view of the roof 1, showing the distribution of wind directions 14 caused by fans 3 appropriately disposed above the ridge line 13 at predetermined intervals. 15 is a wall of the building A, and 16 is a steeply sloped conical cap for preventing snow from accumulating on the fan 3.

The embodiment of this invention is constructed as described above, and if the rotation of the fan 3 is started at the beginning of snow accumulation, the airflow 6 from the fan 3 will cause the snow to sink vertically from above the roof 1. The fallen snowflakes are deviated to the outside of the roof 1 and do not accumulate on the roof 1.

The vertical width and wind speed of the blowing air can be determined as appropriate depending on the quality of the snow and the size of the roof, and as shown in Figure 4, multiple fans can be installed to accommodate roofs with a large area. You can also do it.

[Brief explanation of the drawing]

Figure 1 is a schematic sectional view of the snow accumulation prevention device of the present invention, Figure 2 is a sectional view of Figure 1, and Figure 3 is a
FIG. 2 is a cross-sectional view, and FIG. 4 is a plan view showing the installation situation of the proposed device. 1: Roof, 3: Fan, 6: Airflow.

Claims (1)

[Scope of utility model registration request] A fan 3 that generates an airflow 6 in a substantially horizontal radial manner is installed above the roof 1, and the fan 3 is configured to prevent the snow from accumulating on the roof 1 with the airflow 6. A large number of 12 axes are arranged,
This roof snow prevention device is constructed by attaching guide vanes 11 that are freely adjustable and rotatable about each pivot shaft 12, and configured so that the wind force distribution of the blown air flow 6 can be adjusted by adjusting and rotating each guide vane 11.