Thermal Drive For Greenhouses: The Need For Ventilation And An Automatic Opening Device, An Auto-opener For A Window Leaf With Your Own Hands

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Thermal Drive For Greenhouses: The Need For Ventilation And An Automatic Opening Device, An Auto-opener For A Window Leaf With Your Own Hands
Thermal Drive For Greenhouses: The Need For Ventilation And An Automatic Opening Device, An Auto-opener For A Window Leaf With Your Own Hands

Video: Thermal Drive For Greenhouses: The Need For Ventilation And An Automatic Opening Device, An Auto-opener For A Window Leaf With Your Own Hands

Video: Thermal Drive For Greenhouses: The Need For Ventilation And An Automatic Opening Device, An Auto-opener For A Window Leaf With Your Own Hands
Video: Automatic Greenhouse Window Opener, Univent 2024, March
Anonim

Ventilation for a greenhouse is a system of measures that is designed to maintain the temperature regime, humidity, and also replenish the volume of carbon dioxide. Thanks to this, the cultivation of crops is successful.

The ventilation process is carried out by exchanging the air that is inside the greenhouse with the air that is concentrated inside.

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The need for ventilation: reasons

To grow a large number of quality products, gardeners and gardeners must provide the most comfortable conditions for their land plots. The work of the greenhouse is to maintain optimal conditions for the growth and development of vegetables. To do this, it performs the following functions:

  • maintains a temperature that should be at least twenty-two degrees Celsius;
  • maintains optimal air humidity, which is unique for each type of plant;
  • provides ventilation.
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To carry out the process of normalization of such necessary indicators as temperature and humidity, plants must "take air baths."

A few years ago, ventilation was carried out by opening windows and doors. But today there are devices for automatically opening and closing windows in greenhouses. The standard ventilation method is not entirely suitable for normal plant life. Since a draft is a sharp change in temperature and humidity in a room, which can have a detrimental effect on the culture.

In addition to the fact that auto-ventilation controls the required climatic parameters, it is able to prevent harmful bacteria and fungi from entering the greenhouse. That is why, in order to save your personal time and a normal microclimate in greenhouses, it is recommended to install thermal drives, they will provide high-quality ventilation, because every farmer knows that the presence of fresh air is the key to the rapid growth of plants.

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Features and benefits of application

The heat actuator is an automatic closer that starts its work when the air temperature in the greenhouse rises by opening a window. In other words, its principle of operation is based on the fact that the window opens when the temperature for crops is too high. The auto-ventilator has such positive characteristics as:

  • you do not have to constantly monitor the air temperature in the greenhouse;
  • the ventilator does not need to be connected to the mains in order to function;
  • self-opening automatics for windows can be purchased at any building or gardening store, as well as made by hand.
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Before buying a thermal actuator, you should not overlook the peculiarities of installing and using the ventilator. It is important to know that the effort during the opening and closing of the window opening should not exceed five kilograms. The thermal actuator consists of two elements, the first of which is attached to the greenhouse wall, and the second to a window or door. The peculiarities of the ventilator include the fact that the cavity inside it is filled with liquid. It is this moment that is decisive for the need to open or close a window. That is why it is not worth disassembling the ventilator into separate elements, as this can damage its structure. The device functions fully only if it contains the required amount of liquid.

Important! The advantage of this device is also the fact that it can be used both in a polycarbonate greenhouse and in a “dome” greenhouse made of a different material and shape.

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Characteristics and working principle

Whatever type of thermal drive is used, its main task is to ventilate the room with high quality while increasing the maximum allowable temperature threshold. If this indicator drops to the optimal rate, the controller closes the door and window. The temperature actuator is a device consisting of two parts:

  • temperature sensor;
  • the mechanism that drives this device.

These components can be located and designed in different ways.

The autoflower can also be supplemented with a closer and a lock, which are responsible for the tightness of closing the holes during auto-ventilation.

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There are several types of automatic ventilation machines for greenhouses, which differ in the operating mechanism

  • Volatile. This electric drive drives the motor. The function of switching on the device is carried out by the controller, it is able to quickly respond to the reading of the temperature sensor. The advantages of this thermal drive include the programming of its parameters at the discretion of the user. As a disadvantage, one can single out its dependence on electricity, with which there are often failures.
  • Bimetallic. His device includes several metal plates that are interconnected. Each component differs in response to changes in air temperature. At the same time, the size of the first increases, and the second, on the contrary, decreases. This feature makes it possible to easily open the window to carry out ventilation and in reverse order. This system is simple and autonomous, but at the same time has a disadvantage in the form of low power for the implementation of openings and closings.
  • Pneumatic. Nowadays, this type is considered the most common. The basis of its work is the supply of heated air to the piston system. From a sealed heated container, air is sent to a piston drive, which is mounted to drive the entire mechanism. The disadvantages of the device can only be attributed to the fact that it is quite difficult to do it yourself.
  • Hydraulic. It has a simple design and is therefore often used in recent years. Its basis is two communicating vessels. The liquid is transferred from the first to the second when the air pressure changes when it heats up and cools. The positive characteristics of the device include its good power, non-volatility and ease of assembly. No flaws were noticed.
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Thermal actuators have the following positive characteristics:

  • reliability - thanks to high-quality materials from which the device is made, auto-openers can withstand enormous pressure; the products are quite durable, as well as resistant to strong winds and an accidental attempt to close the door by hand;
  • long service life;
  • no need for adjustment;
  • versatility of use;
  • the ability to install without professional skills.
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Many people think that making a thermal actuator yourself is an overwhelming task. But this is not entirely correct opinion, since in practice everything looks much simpler than it seemed. To complete the work, you need to spend time, effort, and apply the relevant knowledge.

DIY self-ventilation can be made in several ways.

From a cylinder from a computer chair

Using items at hand to create something useful is fun, practical, and effective. The main rules for work are consistency and clarity of implementation. To make a ventilation device, you need to take a cylinder from a computer chair, on one side of it there is a rod made of steel, on the other - made of plastic. The process includes the following steps:

  • it is worth pulling the stem out of plastic;
  • the cylinder must be relieved of pressure from the inside by putting a metal pin on it;
  • the cylinder is cut off with a grinder;
  • it is necessary to carefully remove the stem from steel without damaging it;
  • an M8 thread is put on the stem for safety, and the part is clamped in a vice;
  • from the internal parts of the cylinder, only a liner will need to be used, which is put in place and a piston made of aluminum, from which the rubberized rings are taken;
  • each of the elements should be cleaned by washing in gasoline;
  • carefully insert the stem into the sleeve, the end of which should be outside;
  • on the existing thread, it is necessary to screw the nut, which is designed to hold the stem;
  • then an aluminum rod is inserted;
  • an elongated nut is put on the rod thread;
  • the plug must be inserted and connected to the control levers;
  • the system should be filled with engine oil.

Thus, the thermal actuator will be ready to use and perform its immediate tasks.

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From an automobile hydraulic cylinder

The installation of this device should be carried out with extreme caution, doing the following:

  • there is gas in the hydraulic cylinder, it must be released by drilling holes;
  • a hose is connected to the hydraulic cylinder - for this, a thread is cut, and the hose is fastened with a bolt that has an M6 hairpin;
  • you need to prepare the receiver in advance for the process, which is better to order from specialists;
  • after squeezing air out of the system, it must be completely filled again with it;
  • it is worth checking how well the device is sealed.

Working with gases is quite dangerous, so do not forget about basic safety rules.

With consistent and correct execution of all stages of creating auto-ventilation, this system will work efficiently.

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From a car shock absorber

This option is a difficult way to make auto-ventilation from available tools. In this situation, as in the previous one, the main active element is engine oil. It is this substance that is capable of a subtle reaction to any temperature difference, contributing to the beginning of the functioning of the system. The execution of a thermal drive for a greenhouse from a shock absorber has the following sequence:

  • preparation of materials - a gas spring from a car shock absorber, two taps and a metal tube;
  • near the window, which will carry out the ventilation, it is necessary to install the shock absorber rod;
  • it is necessary to prepare a pipe for oil - a tap is connected to the first edge of the pipe, which regulates the flow of machine oil, to the second edge - a similar structure that will perform the drain function;
  • the bottom of the gas spring must be cut and then connected to the oil pipe.

By completing all of the above steps, you can create a thermal actuator. The main thing is not to forget to check the condition of the oil in the system. The advice of professionals, your own ingenuity and perseverance will be excellent assistants in creating a thermal actuator with your own hands, using unnecessary improvised means.

Installation of a device with and without a closer will also not be a problem, because the design of this type of ventilation is rather primitive.

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Tips for use and care

The thermal drive for greenhouses does not differ in whimsical care. Lubrication of the elements of the device that are moving is mandatory. And also do not forget that the liquid level must be constantly monitored, as well as the physical indicators must be changed, which set the automatic system in motion. Provided that the greenhouse will not be used in winter, it is recommended to remove the thermal actuator from the window or door. Such an event can significantly increase its service life. The important points of servicing the ventilator are as follows:

  • annual lubrication with oil;
  • it is forbidden to disassemble devices or change their design, as this can render the thermal actuator unusable;
  • nothing should interfere with the ventilator during operation;
  • do not fix the device when it is closed;
  • doors and vents should not have handles and latches, which can interfere with the effective operation of the system;
  • do not overdo it when opening the door of the auto-ventilator.

It is worthwhile to install the thermal actuator correctly and with all responsibility. The best place to install it would be a ventilation frame - this is exactly where the system will perform well. Thanks to the presence of a thermal drive, work on greenhouse areas will become much easier. The main thing is to treat the device with care and do not forget to take care of it.

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Testimonials

There are many good reviews from domestic thermal drives, which have different types. They are characterized by ease of installation, so everyone will be able to mount the opener. And also users are pleasantly pleased with the affordable price of ventilation devices. A small number of not entirely positive responses are associated with the installation of the device. Users say that before installing the auto-ventilator, it is necessary to organize a platform for its attachment, since standard polycarbonate walls cannot fully support the structure. Plywood, galvanized sheet or profile will help to solve the problem.

According to summer residents, it is better to install the auto-ventilator on the side located at the opposite end from the opening that opens. People who made a thermal actuator on their own note that their devices have a slightly delayed reaction to a change in temperature. Everything else completely suits both farmers and amateur gardeners.

Installing a thermal drive is a great way to automate work that will help plants grow, develop and harden well.

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From the above, we can conclude that auto-ventilation for a greenhouse is a necessary thing. The heat drive is a great helper that will create comfort and coziness for crops in the greenhouse, while not wasting your time. The cost of the opener is affordable and fully pays off. In addition, such a thing can be easily assembled with your own hands. This is ideal for those people who have decided to try their hand at growing plants, but do not have the ability to constantly monitor vital signs for crops in greenhouses.

See below for more details.

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