RU1197U1 - Perforated Shelter Film - Google Patents

Abstract

1. The perforated film of the protective shelter of plants, characterized in that it is made of two layers of materials bonded to each other with different thermal deformation coefficients, and the perforation is made in the form of perforations with an open loop. A film according to claim 1, characterized in that one of the layers is made discrete in the form of strips. The film according to claim 1, characterized in that it is made of high density and low density polyethylene duplicated films.

Description

PERFORATED PLAIN OF THE FAST PLANT SHELTER

The utility model relates to the area of 5 protective shelters for plants and can be used in agriculture, in household plots and summer cottages.

Shelter of plants in the form of a continuous film stretched over plants directly or as part of portable film structures l. The disadvantage of such shelters from the film is the need to raise the film for ventilation from overheating and for access of pollinating insects.

Closest to the technical nature of the claimed object is a perforated (hole) film of the protective shelter of plants 2, the holes in which are made round and constantly open. Such a film allows several valves through these openings; ditch the covered volume and give access to insect pollinators, which eliminates the need to raise the films. However, constantly open holes in cold weather, reduce the protective effect of the film. At the same time, if you reduce the number or size of the holes, then ventilation will not be ensured, and if the temperature rises, overheating is possible.

The utility model solves the problem of expanding the technological capabilities of the protective shelter of plants by changing the size of the opening of the perforation hole in the film when the temperature changes.

For this, the perforated film, according to the utility model, is made of two layers of materials bonded to each other with different coefficients of thermal deformations, and the perforation is made in the form of openings with open

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contour. In this case, one of the layers can be made discrete in the form of strips. As a special case, a perforated film can be made. duplicated between, are films, one of which is of high density polyethylene, and the other is of low density aolyethylene.

In such a perforated film of the plant shelter, the openings of the perforation holes are covered with petals of the cutout contour in cold weather, and in hot time the petals are bent due to

different temperature expansion of the layers, opening the openings of the holes for ventilation and access of insect pollinators, at the same time due to bending, the light transmission of the petals changes, resulting in partial shading.

In FIG. I, 2, 3 show variants of a perforated film, in FIG. 4 is a section AA of FIG. I and FIG. 2. at low temperature, in FIG. 5 - the same at high temperature, in FIG. b - section BB of FIG. 2, in FIG. 7 is a section BB of FIG. 3 at low temperature, in FIG. 8 is a section GG of FIG. 3 at low temperature, in FIG. 9 - the same at high temperature :.

The perforated film consists of two layers I and 2, fastened together, for example by welding or gluing. Moreover, the coefficients of temperature deformations of layers I and 2 are different, for example, as shown in the figures, for layer I this coefficient is smaller. ,.

On the film, 3 cuts with an open loop were made, - at the same time;

the contour of the notch forms petals; 4. Between the contour 3 notches i

openings 5 of the petal 4 and the contour 3 of the notch on the main array of film — openings 5. One of the layers of the film, for example I, can be made not continuous., but discrete in the form of stripes intersecting the petals 4, as, for example, shown in FIG. 2 and 3. As

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material for the layer; I I can be used, for example, high density polyethylene, and for the layer; - low density polyethylene, which differ in the coefficient of thermal deformation (in LAYER: 2 it is higher).

The device (perforated film) of a protective shelter of plants works as follows.

At low temperature (at: which the film is made or normalized), the petals 4 are straight, the contours 3 of the notch of the film and the petal are adjacent to each other, closing the opening 5. When heating (increasing temperature), the petals. 4 warp (bend) due to different temperature deformations of layer I and 2, and the contour of the notch on the main film array, due to tension, remains flat. In this case, between the contour 3 of the notch, petal and contour 3 of the notch on the main array of the film, openings 5 are opened through which the volume under the film is ventilated and through which pollinating insects are accessible. In addition, due to the bending of the petal 4, its light transmission is reduced, due to which there is a partial shading that reduces overheating under the film.

Compared with the prototype, the device has increased technological capabilities, since at low temperatures the perforation openings are closed and retain heat, and in hot weather they are open, allowing you to ventilate the volume under the film, giving access to insect pollinators and partially shading the underflank space.

Director of GT V.A. Pazuschan

sources of in $ or1adiya

1.Nazarinov L.V. Greenhouse in a household economy.-M.: Rosselkhozizdat, 1987, p. 40-4Z.

2. Zemlyanika / A. Kalinkin et al.-M .: Panorama, 1990, p. 12 (prototype).

Claims (3)

1. The perforated film of the protective shelter of plants, characterized in that it is made of two layers of materials bonded to each other with different thermal deformation coefficients, and the perforation is made in the form of perforations with an open loop. 2. The film according to claim 1, characterized in that one of the layers is made discrete in the form of strips. 3. The film according to claim 1, characterized in that it is made of high density and low density polyethylene duplicated films.