The presence in the summer cottage of the greenhouse allows you to grow various crops. Many amateur gardeners do greenhouses of different shapes with their own hands. With its arrangement a very important issue is the ventilation system. To date, the issue of ventilation can be solved in several ways, besides, most of them will not require large financial and time costs. Thus, the best option is automatic ventilation, which will allow the system to independently regulate the opening and closing of windows in the greenhouse. Automatic ventilation of the greenhouse with their own hands is easy to perform. Enough to read this article until the very end, stock up on tools and material, and also make a little effort.
A modern greenhouse can be equipped with the following types of ventilation:
To organize natural ventilation it is enough to equip several windows. Regulation is determined by the degree of opening. During the construction of the greenhouse, everyone can independently choose the number, size and location of the vents not only in the walls, but also in the roof. This option is suitable for small greenhouses. An important issue in natural ventilation is to determine the time allotted for ventilation. It will depend on the ambient air temperature.
For arranging forced ventilation in a greenhouse, special electric fans are used, which force air. Forced ventilation in large greenhouses or complexes involves the use of fans for air recovery. The automatic ventilation system is designed to open and close windows automatically without human intervention.
The best option for any summer resident is an automatic complex that monitors and carries out not only airing, but also watering, lighting, and heating in the winter. This allows you to grow crops with minimal time costs.
Automatic ventilation of greenhouses is organized in several ways:
It is worth examining each carefully to make the most justified choice. First, consider the advantages and disadvantages of automatic electronic systems. Among the advantages are:
The list of shortcomings is small, but it may affect your choice:
The whole structure is designed using sensors and relays. You can find such systems in specialized stores or they are made to order. Self-production will require a lot of time, effort and additional special elements.
Autonomous automatic systems are developed on the basis of materials that change their parameters when the weather changes (decrease or increase in air temperature). In other words, it can be said that ventilation opens when using the physical properties of materials. No other sources are used, and, therefore, this method is more affordable and economical. The main advantages of this type of system are:
Autonomous systems are divided among themselves:
The first option involves the use of gases and liquids that expand when heated from high temperatures in the greenhouse. As an expander, you can use: water, engine oil, paraffin, freon or compressed air. They are classified as available materials.
In the second version, the properties of the two materials are used, which change their length differently during heating. The metal plate will expand with increasing air temperature, and when cooled, the reverse process will occur.
It is more expedient to install electronic systems in large greenhouses, where they grow vegetables and fruits for sale all year round.
The advantages of hydraulic ventilation systems are enough to make a choice in their favor. So, airing is quite simple to do with your own hands and as a result to get a reliable and powerful system that will last more than one year. The basis of the whole mechanism includes a system of levers that are equipped with sensors and connected to the windows.
The principle of the hydraulic system is as follows: when the weight on the lever arm changes, the rocker bends and opens the windows. When the temperature cools, the reverse occurs. In the role of levers are 2 containers that are connected by a hose. The first tank should be inside the greenhouse, and be filled with air - act as a thermometer. The second container is fixed outside, as it plays the role of weights. When the air is heated, the fluid will be pushed out and move.
The container inside the greenhouse must be heated by the temperature of the air, and not by sunlight.
Most gardeners prefer simple systems, as they have more positive qualities:
Not knowing how to make a simple automatic airing of the greenhouse with your own hands from improvised means, it suffices to read this section. So, the most common way is iridescent vessels. Anyone who decided to facilitate the ventilation process in the greenhouse can create them. No special knowledge or skill in locksmithing is needed. All elements are safe, and the resulting system will not require constant adjustment.
To create a system you need:
When selecting containers it is necessary to take into account the weight and size of windows. For small windows fit plastic bottles of 6 and 2 liters. A large bottle is an expansion tank that must be hermetically sealed with a sealant. In the cover set the fitting, which put the hose. Before this, 1.5 liters of water is poured, as 3/4 of the total volume must be filled with air. The same procedure is used for a small bottle. Pour a small amount of water so that it covers the edge of the overflow pipe.
The expansion tank is installed at the place where the air temperature is determined (most often under the roof), and also as close as possible to the window that will open. A small bottle is hung on the top of the transom frame. The principle of operation is as follows: the heat will cause the air inside the tank to expand, which will cause the water to be squeezed out into a small bottle. Increasing the weight will cause the window to open. When the temperature drops, water will flow back through the hose and the window will close.
When creating automatic ventilation using the method of overflowing vessels, it is important to check the tightness of the joints from time to time. If this indicator is broken, the system will stop working.
This ventilation system is based on the use of thermal energy. As you know, when heated, the air expands, which allows the use of the organization of ventilation in the greenhouse. On the one hand, such a construction can be called complex, but on the other, with a lot of desire and time, you can cope with this task. Everything should be done in stages:
When the air in the canister warms up, it will go into the cylinder and inflate the ball. The piston and the rod under pressure will rise up, the string will stretch and the window will open.
Thanks to the constant aeration in the greenhouse, the plants will not wither, as the air temperature stabilizes and is as comfortable as possible. Because of the high temperatures, crops will not be able to bear fruit and will die quickly enough. It is quite simple to create a primitive system of automatic ventilation, besides, this will not entail additional and unintended costs.
You may be interested in the following materials:
How to make a greenhouse from window frames
How to make a greenhouse from PVC pipes
Drip irrigation of the greenhouse with your own hands
Winter greenhouse with your hands
From the provided video material, you will learn about how self-made automatic ventilation of the greenhouse works: