Greenhouse-automatic. Drawing, description

TOOLS AND MECHANISMS FOR AGRICULTURE
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Greenhouse-automatic. Drawing, description

Tools and mechanisms for agriculture

Directory / Tools and mechanisms for agriculture

The "greenhouse effect" can work both for good - with a lack of heat in spring or cold summer days, and for evil - when the bright summer sun brings the temperature in the greenhouse to values at which even heat-loving cucumbers or tomatoes cannot withstand and die. This does not happen when at any time you can open the transoms and thereby reduce the temperature in the greenhouse. Well, what about those owners of garden plots who come to the dacha at best once a week?

I bring to the attention of gardeners a simple, environmentally friendly device for self-regulation of temperature in a greenhouse. It differs from well-known similar devices in that it does not require an external source of energy (except, of course, the sun), and ordinary air serves as the working medium in it.

The automatic temperature controller consists of a sector housing made of thin duralumin, a rotary valve, an inspection cover and a push link. The executive element of the device, which drives the transom flap, is a chamber from an ordinary soccer ball, which is connected by a hose to an expansion tank with a volume of about 30 liters.

Automatic greenhouse
Device for automatic temperature control in the greenhouse: 1 - housing, 2 - valve, 3 - inspection cover, 4 - coupling, 5 - pusher, 6 - transom support plate, 7 - tank pipe, 8 - hinge, 9 - expansion tank, 10 - transom, 11 - machine drive chamber, 12 - pipeline. The letters indicate: a - the transom is open, b - the transom is closed

This device works as follows. When the temperature in the greenhouse rises above 25°C, the air in the expansion tank also heats up and, as a result, increases in volume. Excess air fills the football chamber - the executive element of the device. The camera, when its diameter increases, turns the valve, and through the pushing link, it slightly opens the transom sash.

When the temperature in the greenhouse drops below 25°C, the air in the expansion tank cools, its volume decreases, and the rubber football chamber also decreases in size. At the same time, the sash of the transom closes under the action of its own weight.

The self-regulating greenhouse temperature device has been running in my garden for about five years now and requires little or no maintenance or adjustment during the summer. By the way, it can be installed in the greenhouse both vertically and obliquely.

Author: M.Kuznetsov

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