JP2590098Y2 - Greenhouse ventilation - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation device for a greenhouse for cultivating melons, and more particularly to a ventilation device for a greenhouse that is devised so as not to hinder the sunshine.

[0002]

2. Description of the Related Art Conventionally, in a greenhouse for greenhouse cultivation, a ventilation device is sometimes disposed on a wall surface to discharge hot air inside the room. In many cases, a shutter is arranged in front of the ventilation fan. In this case, a large-sized ventilation fan is used to provide sufficient ventilation capacity, and a large-sized shutter is inevitably disposed.

[0003]

However, in the conventional ventilating apparatus, since the ventilation fan blades and the shutter blades are opaque, ordinary ones are shaded and hinder the sunshine. Becomes In addition, since the ventilation fan is large and has a considerable weight, a large supporting frame and other mounting members are used, which results in a large one, which also has a drawback of hindering sunlight. Therefore, especially in a melon cultivation greenhouse or the like where it is required to ensure uniform sunshine for each plant, such a ventilation device is usually not provided. SUMMARY OF THE INVENTION An object of the present invention is to provide a ventilation device for a greenhouse that can minimize the inhibition of sunshine in view of the above points.

[0004]

The ventilator for a greenhouse according to the present invention is provided with a ventilation fan window in the greenhouse, and a ventilation fan whose blades are formed of a transparent synthetic resin material is arranged in the ventilation fan window. In the figure, a shutter in which a flap-shaped blade made of a transparent synthetic resin material is opened and closed is arranged. In this case, the ventilation fan is provided with a pulley at the rear end of the drive shaft, and a drive motor is disposed at the corner of the ventilation fan window so that the drive motor is driven to rotate via a belt. The shutter is a wind pressure-linked shutter whose blades are opened and closed by the wind pressure of the ventilation fan.

[0005]

[Function] When the ventilation fan is not driven, the shutter is closed, and when the ventilation fan is driven, the blades of the shutter are opened to discharge the hot air in the greenhouse and perform indoor ventilation. Since the blades are formed of a transparent synthetic resin material, the blades of the ventilation fan and the shutter blades do not become shaded, and do not hinder sunlight regardless of whether or not the ventilation fan is driven. In addition, the ventilation fan is provided with a pulley at the rear end of the drive shaft and a drive motor is arranged at the corner of the ventilation fan window which must be shaded and driven via a belt, so a general motor direct connection type Unlike a ventilation fan, the motor does not become shaded, and since the ventilation fan is reduced in weight and the supporting frame can be made thinner, obstruction of sunshine is reduced as much as possible.

[0006]

In the drawing, reference numeral 20 denotes a greenhouse for greenhouse horticulture, and a side wall 21 and a roof 22 are constructed of a transparent body. A ventilation fan window 1 is provided on the side wall 21, and a ventilation fan 2 whose blades 3 are formed of a transparent synthetic resin material is disposed on the ventilation fan window 1, and a flap shape formed of a transparent synthetic resin material is provided on the front surface of the ventilation fan 2. The shutter 5 is arranged so that the blade 6 can be opened and closed. The window frame 11 of the ventilation fan window 1 uses a metal frame from the point of strength. The mounting frame 12 of the ventilation fan 2 and the closing plate 13 around the blade 3 are also made of a metal material from the viewpoint of strength and vibration prevention. Therefore, the corner 10 of the ventilation fan window 1
Is made of an opaque material, and shade is unavoidable. In view of this, the drive motor 7 is disposed at the corner 10, and a pulley 8 is provided at the rear end of the drive shaft 2 a of the ventilation fan 2 so as to be driven via the belt 9. The power cord 7a of the drive motor 7 is wired along the window frame 11.

[0007] The ventilation fan 2 is provided with four
The blades are formed as a single blade, and blade mounting pieces 2b are provided radially from the drive shaft 2a, and the blades 3 made of a transparent resin material are mounted thereon. In the figure, 4 is a ventilation fan 2
A mounting mechanism for mounting the two mounting angles 1 on the corner portion 10 diagonally.
The support frame 4a is extended in parallel between 4, 4 and a ventilation fan is attached thereto. The bearing 2c of the ventilation fan 2 is fixed to the mounting plate 2d, and the mounting plate 2d is fixed to the support frame 4a. The shutter 5 is of a wind pressure interlocking type in which the blades 6 are opened and closed around the driving fulcrum 6a by the wind pressure of the ventilation fan 2, and the mounting frame 5a is made of sheet metal because it is necessary to secure the strength. Made of material. It should be noted that the shutter 5 may be of a type in which the blades 6 are mechanically opened and closed or of an electric opening and closing type.

[0008]

[Effect of the Invention] According to the greenhouse ventilation device of the present invention, the shutter is closed when the ventilation fan is not driven,
When the ventilation fan is driven, the shutter blades are opened and the hot air in the greenhouse is discharged to perform indoor ventilation. Since the shutter blades and the ventilation fan blades are formed of a transparent synthetic resin material, the ventilation fan blades and There is no shading caused by the blades of the shutter, and there is no hindrance to sunlight regardless of whether the ventilation fan is driven or not. Also,
The ventilation fan is equipped with a pulley at the rear end of the drive shaft, and a drive motor is arranged at the corner of the ventilation fan window, which must be shaded, and is driven to rotate via a belt. As described above, there is no large shade caused by the motor part, and the body of the ventilation fan can be reduced in weight, so that a thinner member can be used as a support frame and other mounting members, and the mounting structure is simplified and the sunshine is reduced. Inhibition can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a ventilation device for a greenhouse according to the present invention as viewed from the indoor side.

FIG. 2 is a perspective view of a shutter viewed from an outdoor side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ventilation fan window 11 Window frame 2 Ventilation fan 2a Rotating shaft 3 Blade 4 Mounting mechanism 4a Support frame 5 Shutter 6 Blade 7 Drive motor 8 Pulley 9 Belt 10 Corner 11 Window frame

Claims (3)

(57) [Scope of request for utility model registration] 1. A ventilation fan window (1) formed in a greenhouse (20), a ventilation fan (2) arranged in the ventilation fan window, and a flap-shaped blade (6) arranged in front of the ventilation fan. A shutter (5) for opening and closing; a blade (3) of a ventilation fan (2) and a blade (6) of a shutter (5).
Is formed of a transparent synthetic resin material. 2. A ventilation fan (2) is provided with a pulley (8) at the rear end of a rotating shaft (2a) and a drive motor (7) at a corner (10) of a ventilation fan window (1). 2. A greenhouse ventilation system according to claim 1, wherein said drive motor is driven to rotate via a belt (9). 3. The ventilation device for a greenhouse according to claim 1, wherein the shutter (5) is a wind pressure-linked shutter whose blades (6) are opened and closed by the wind pressure of a ventilation fan (2).