Choosing vending machines for greenhouses

Choosing vending machines for greenhouses

Growing plants in greenhouses is a rather difficult process that has a lot of features and subtleties. In fact, it is not called a “battle for the harvest” in vain, since many difficulties will have to be overcome to grow greenhouse vegetables. Temperature can be one of the problems: too low or too high temperatures are bad for any plants. The same will apply to high humidity. Therefore, you should talk in more detail about such a thing as automatic systems for ventilating greenhouses, which help to quickly solve the above problem..

Advantages and disadvantages of using

If we talk about automatic options for ventilating greenhouses, then they receive energy from a centralized power supply system or can be autonomous.

In other words, they fall into two broad categories:

  • independent solutions;
  • volatile options.

If we talk about the advantages of the automatic ventilation system for greenhouses, then we should name:

  • high manufacturability of the process;
  • compact design;
  • airing of the premises is carried out within the stated time frame;
  • high power.

The disadvantages of such a mechanism are the following points..

  • If a breakdown occurs in the machine, the plants that are inside the room will die. You can avoid the likelihood of such an outcome if you purchase a spare electrical unit in advance..
  • If a breakdown of any structural element is detected, the entire system will need to be repaired..

In general, despite the presence of certain disadvantages, such mechanisms have undeniable advantages, which really make it possible to make a reinforced or conventional ventilator an effective solution for growing plants..

Views

Now let’s move on to the types of automatic ventilation systems. As already mentioned, such mechanisms are divided into independent solutions and volatile autotype options. Volatile solutions are of great interest today. As a rule, the essence of such systems is to operate from the power grid and, somewhat less often, from solar-type batteries or some other energy sources of an alternative direction. Such devices are usually used to operate a thermal relay, which can activate fans, providing fresh air to the greenhouse..

Independent solutions, in turn, fall into three categories:

  • based on pneumatics;
  • bimetallic;
  • hydraulically based.

Now let’s analyze each machine in more detail. The bimetallic version for greenhouses works according to the following algorithm: when exposed to a certain temperature, the material of a linear type expands. This design provides for the presence of two types of materials, and the essence of the work consists in different coefficients of their expansion. That is, when the temperature rises, the thermal drive in auto mode opens the vents and doors in the greenhouse, and when it decreases, it closes them. In this case, the automation has only one drawback – it is difficult to select the required temperature so that ventilation is carried out efficiently..

The hydraulic option for ventilating greenhouses has a number of advantages:

  • lack of unpleasant odors or their minimum amount;
  • lack of dependence on electricity;
  • easy to assemble with your own hands;
  • there is no need to constantly be near the greenhouse;
  • the ability to work inside under comfortable conditions.

Such a system is considered one of the most reliable.

It should be noted that the hydraulic ventilation mechanism has some disadvantages:

  • great inertia;
  • high price;
  • temperature can only be tracked where the system is located.

Such a machine has a rather simple device. The hydraulic cylinder begins to move only when there is a difference in the temperatures of the oil and the tank material. That is, it turns out that the stock is gradually being displaced. And it is the hydraulic actuator that will open the window. To obtain optimal conditions in the greenhouse, allowing you to effectively care for the plants, you just need to set a certain temperature. The door automaton automatically opens the door when the temperature rises above the target.

The system returns to the initial position only when the ventilator for dome vents or doors receives information that the temperature in the greenhouse is at the lower mark.

Before purchasing a hydraulic universal auto vent for greenhouses, please pay attention to the following points.

  • Price. Such machines are necessary for every window and door in the greenhouse. The price of one unit of construction will be approximately three and a half thousand rubles..
  • Power. You should know exactly how much power is needed to lift this or that element in the greenhouse..
  • It is also necessary to know the weight of the machine, which the greenhouse structure can withstand..

The pneumatic version uses thermal energy. Its main advantage will be that it is completely independent of any other energy sources..

Other advantages of this option include:

  • serious performance;
  • low price.

It also has a number of disadvantages, namely:

  • small working effort;
  • great inertia;
  • dependence on indicators of atmospheric pressure;
  • bulkiness.

There are also electrical models of auto-ventilators for greenhouses, which were mentioned above..

Such systems are very convenient due to the fact that they have:

  • excellent power of the electric drive;
  • precise and convenient adjustment system.

They are perfect for greenhouses where there is a need to use complex and multi-stage ventilation systems. The main elements of such systems are a thermal regulator, which is responsible for turning off and on the system, as well as an electric ventilator. The main disadvantage will, of course, be the dependence on the availability of electrical energy..

In general, as you can see, there are many options for ventilation systems for greenhouses, and each person will be able to choose the most effective solution for his greenhouse..

Manufacturers

Now let’s make a small overview of products for greenhouse ventilation from various companies. A number of automatic devices are on sale today that work according to the various principles mentioned above. Any model that will be described is quite simple to install yourself. But if we are talking about electrical solutions, then it would still be better to contact a specialist..

“Dusya San”

So, the first option, which I would like to say – “Dusya San”. This variant uses a thermal cylinder that works on a hydraulic principle. Such a model works at a temperature of no more than fifty degrees. The mass of the largest window that this device can open is seven kilograms. The machine is sold fully equipped, in addition to it there is an installation manual.

Installation can be done in various greenhouses. The main thing is that the window leaf clearly works both for closing and opening. The opener does not require batteries or an electrical connection. In this case, the ventilator can be easily adjusted to open the window within the required temperature range. If the temperature rises to an indicator of 30 degrees, then the window opens to the end.

“Sesame-M-2015”

Another interesting option is called Sesame-M-2015. The main element of this system is a hydraulic cylinder filled with oil. This model is applicable over a wide temperature range and can be easily customized. The weight of the product is only one kilogram, but this is enough for the thermostat to easily open heavy vents of overall dimensions and doors. To avoid false alarms of the system from overheating, you can protect it by installing special umbrellas on the street side..

If you need to leave the door open, there are special hooks for this. This option requires virtually no maintenance during use – it is only necessary to occasionally lubricate the mechanism with machine-type oil.

“Thermal drive”

The next model is “Thermal drive”. This development of a domestic manufacturer from Krasnoyarsk can open a window or door weighing up to twenty kilograms. But it is better to use it on window and door structures weighing up to ten kilograms. The largest opening angle is 45 degrees.

This design works using a hydraulic type thermal cylinder. The manufacturer gives a twenty-year guarantee for its products. It is quite simple to install such a system with your own hands – the instructions contain a similar installation scheme for this model.

Open planet

Another solution I want to talk about is called Open Planet. The manufacturer guarantees that this device creates an ideal microclimate in the greenhouse for plant cultivation. Thanks to him, the temperature in the greenhouse can be adjusted in the range from 15 to 25 degrees..

This model has a reinforcement of the structure with two springs, which makes it possible to use it not only on the vents, but also on the doors. The auto-ventilator is made of stainless steel. But in the cold season it is better to dismantle it so that the cylinder does not deform..

Ventilation schemes

Now let’s talk about how to develop schemes for automatic ventilation of greenhouses. This moment is very important, since the yield of plants and their comfort depend on it. With large volumes of premises, rather complex device circuits are usually used, which take into account the value of various characteristics as much as possible. However, such an auto system for ventilating greenhouse rooms will not be so urgent for a not very large home-type structure..

Good ventilation of the room can be ensured if the periods of opening and closing of windows and doors are correctly combined..

The most common patterns include the following:

  • one-sided ventilation – through two or more vents located next to each other, or transoms;
  • through – two simultaneously open windows or doors located on different sides of the building;
  • independent – each element, equipped with the necessary equipment, opens independently of the others;
  • a mechanism connected to the control unit, which will take into account several parameters depending on the setting and characteristics of the equipment, and which works according to a certain algorithm.

The selection of various ventilation mechanisms will depend on the type of building, as well as on the goals that the owner of the greenhouse will pursue.

How to do auto ventilation?

Now let’s talk about how to create the system in question with our own hands. The simplest design will be based on two ordinary glass preservation jars. One can will have a volume of three liters, and the other – 800 milliliters.

In addition to them, we need:

  • one tin cover for seaming;
  • polyethylene cover;
  • a thirty-centimeter pipe made of copper or brass;
  • a meter-long dropper tube;
  • a wooden block, the dimensions of which should be equal to the dimensions of the window;
  • a pair of “weaving” type nails;
  • thin wire or a piece of rope;
  • tin as well as rosin.

If we talk about the algorithm for creating a ventilation system, then it will consist of 3 main stages.

  • First, you need to pour eight hundred milliliters of water into a 3-liter container and roll it up with a tin lid. Then a hole is drilled in the lid, and a brass tube is inserted into it so that about 2-3 mm remains to the bottom. The hole is carefully sealed using sealant, soldering or otherwise.
  • Carefully make a hole in the plastic lid and push a flexible tube into it so that the distance to the bottom of the small jar is the same as in the first case. We securely seal the hole and close the small jar with this lid. The finished structure is the simplest pneumohydraulic siphon.
  • Now all that remains is to place containers in different parts of the greenhouse, and also to attach a counterweight to the frame. After that, the mechanism will be ready for operation..

Such a simple and easy-to-use design was created back in 2000 and since then has been successfully used in a wide variety of greenhouses. The essence of its work is quite simple and consists in the fact that as the temperature rises, warm air gradually displaces water from a larger jar into a smaller one. Its mass becomes larger, and the window, accordingly, opens. And with a decrease in temperature indicators, a large cylinder will “pull” the water back, and the transom, due to the presence of a counterweight, will restore its original position.

Such a simple and at the same time reliable option will be suitable exclusively for transoms that open along the central axis horizontally. By the way, the opening angle should be limited by a special type of stop. Once every couple of weeks, new fluid needs to be added to a large cylinder instead of the one that has evaporated. In general, as you can see, choosing a machine for a greenhouse is a rather interesting process and requires serious attention..

It will also not be difficult to make such a device with your own hands, if you strictly follow all the instructions presented. To do this, most often you can use the tools at hand, and the proposed option can be adjusted and modernized at your discretion..

In the next video, you will find a brief overview of the automation for ventilation of greenhouses..

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