JPS5844840Y2 - Agricultural double cladding house - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a double-covered agricultural house that improves heat retention and temperature rise through double-covering, and also allows side ventilation during high temperatures during the day.

In recent years, with the deterioration of the oil situation, various measures have been taken to reduce heating costs for agricultural greenhouses, and among these, multi-covering technology, including double curtains, is considered to be promising.

Under these circumstances, there are
The so-called double-covered house, in which the entire house and the entire house except the gable is covered with two layers of plastic film with a suitable distance maintained by blowing air inside the film, has been attracting attention, and has become popular. It has also begun to be sold within the country.

However, the conventional method attempts to double-coat the entire roof surface and sides, and although it has good heat retention and temperature rise properties, in Japan, where sunlight is strong, there is insufficient ventilation during high temperatures during the day, resulting in high temperature problems, There is concern that the concentration of carbon dioxide necessary for photosynthesis will decrease, and it cannot be said that this is necessarily in line with the actual situation in Japan.

A window that can open and close both the skylight and the side windows is the most efficient in terms of ventilation, but in Japan, where there is a lot of rain and strong winds, the skylight opening/closing device has many structural restrictions and is expensive. The opening area is small, and handling is often inconvenient.

On the other hand, side windows have good ventilation efficiency, and can be said to be excellent ventilation equipment in terms of handling and price.

The inventors have developed a pipe house or a house with a relatively simple structure that provides particularly effective heat retention, temperature rise, and ventilation performance when the width is narrow, such as half-naked or several buildings. We aimed for this and arrived at this idea.

In other words, in order to improve heat retention at night and temperature rise during the day, the roof surface is maintained at an appropriate distance by using a two-layered plastic film and sending air at a higher pressure than the outside air into the gap. A single layer of plastic film with separate sides that can be opened and closed independently without compromising the airtightness of the double cladding, allowing for adequate lateral ventilation during high daytime temperatures. It is an agricultural greenhouse covered with

For the two-layer film part, it is convenient to use a tube-shaped blown film with a sufficiently wide fold in order to easily obtain airtightness, but it is difficult to obtain a film with such a wide fold. In such cases, it is also possible to cover the film by overlapping two films and sandwich the periphery of the film with fasteners having good sealing properties to provide airtightness.

When using two films, both are agricultural vinyl chloride films (hereinafter referred to as agricultural vinyl) in terms of heat retention.

), but on the other hand, agricultural vinyl has the disadvantage that it sticks to each other and makes it difficult to spread it out, but if you use polyethylene film on the inside, there will be less adhesion and it will be easier to work with.

Compared to agricultural vinyl, polyethylene allows long-wavelength heat rays to pass through easily and is inferior in heat retention, but when using agricultural vinyl on the outside for a double coating, the heat rays are blocked by the agricultural vinyl, so the overall heat rays of the house are The heat retention and temperature rise properties are not much lower than when both sheets are made of agricultural vinyl.

Additionally, the sides are usually not opened or closed close to the ground, and the bottom edge of the film is often filled with soil to prevent drafts from entering.

Therefore, this part has nothing to do with opening/closing, and of course double-covering will provide better heat retention, but keeping the lower end airtight is a hassle due to the working posture, and it is not enough to cover it with soil. It is difficult to maintain airtightness.

Furthermore, near the ground, the film is relatively often damaged during transport and other management work.

After all, it takes a lot of effort to send air to this part to maintain a double-covered state, and since the area is small, the effect is relatively small, so in many cases it is practical to use a single-layer covering.

FIG. 1 is a sketch of a pipe house in which the present invention is applied, with the side surface opened.

1 is a double-covered roof part, 2 is a fixed tension part on the side, 3 is a single-layer cover with an open upper half of the side, and 4 is a part for opening and closing 3 without damaging the airtightness of 2. 3 is a common holding device for the film, 5 is a string that holds the film in 3, 6 is
is the winding tool for film No. 3.

FIG. 2 is a partial sketch of the house shown in FIG. 1 when the side surface is closed.

3' shows the side of the house closed.

FIG. 3 is a sectional view of the house of FIG. 1.

In Figures 1, 2, and 3, the frame of the house is omitted.

In the case shown in Figure 1, the gable side is not doubled, but if the area is large, it is preferable to double it.

Improves heat retention performance.

The stopper or presser used in the present invention is, for example, an elongated member with a U-shaped cross section, and the end portions of two films are inserted into the opening of the member, and the closing force of the member itself or a separate one is provided. Something that compresses using the force of a spring is used.

Examples of such pressers include Nobichuk (trademark, manufactured by Fukoku Kogyo Co., Ltd.) and Rail Chuck (trademark, manufactured by Akiyama Kennibu Shoten Co., Ltd.).

[Brief explanation of drawings]

FIG. 1 is a sketch of a pipe house to which the present invention is applied, and is a diagram with the upper side of the house opened. 1 is a double-coated roof part, 2 is a lower half of a single-coated side surface, 3 is an upper half of a single-coated side surface, 4 is a film presser,
5 is a string holding down 3, and 6 is a film winding tool. FIG. 2 is a partial sketch of the house shown in FIG. 1 when the upper side of the house is closed. 3 shows the upper part of the side of the house closed. FIG. 3 is a sectional view of FIG. 1. Figures 1, 2, and 3 are drawn without the air blower and the house frame.

Claims (1)

[Scope of utility model registration request] In order to increase heat retention at night and temperature rise during the day, the roof surface is covered with two layers of plastic film, with an appropriate gap maintained by sending air at a higher pressure than outside air into the gap. For agricultural use, the sides are covered with a single layer of plastic film separated so that they can be opened and closed independently without compromising the airtightness of the double cladding, to provide sufficient lateral ventilation during high daytime temperatures. In the greenhouse, one side of the double-covering material is covered with a polyethylene film, and the other side is covered with an agricultural vinyl chloride film, and the periphery of the film is sandwiched with a stopper to provide airtightness. Agricultural house.