All About Paint and Coating Community Blog A dehumidifier with your own hands

If you have had to think about buying a dehumidifier, you are bound to have a question: how to choose a device? For this, you just need to know what technical characteristics distinguish between dehumidifiers.

Performance. All units remove different amounts of moisture per day. This capacity is measured in liters of condensate as standard. How much can a particular model remove moisture from the air for a certain period of time. Choose a dehumidifier that is powerful enough to quickly reduce humidity and then keep it at an optimal level. If it does not provide enough power, your dehumidifier will keep running without stopping, which will result in overheating, and you will also pay a lot for the electricity. A powerful device will reduce the humidity faster, but you do not need its high performance. and it will work, overconsuming energy.

Sometimes, for example, household dehumidifiers are available with additional functionality: air purification, odor removal, ultraviolet lighting. But the price, judging by reviews, for such equipment is always overpriced.

Modern types of climate control equipment are safe, have electronic control, can heat the room, purify the air, and even heat water in the pool. It is better to set the comfortable humidity in the living room at 50-60 percent, the fungus does not appear. Do not forget, a room with high humidity turns into a place where grows harmful bacteria, fungi and microorganisms.

Air dryer for the compressor: budget model with their own hands

To paint the coating turned out smooth, homogeneous, without defects, you can at home make an air dryer for the compressor with your own hands from improvised materials.

Moisture separator for the compressor with his hands

  • Gas bottle is used as a reservoir.
  • It is cut in cross-section with an angle grinder to obtain a demountable structure.
  • To be operated in upside down vertical position. The shut-off valve (tap) is located at the bottom.
  • In the upper part of the cylinder by welding is welded strictly horizontally, with a slight offset to one of the walls of the cylinder, the inlet nozzle with a thread on the ends.
  • This will allow the incoming air under pressure to create spinning jets directly at the walls.
  • The outlet piece of the tube is already welded strictly in the center at the top of the cylinder. The length of the pipe is about 2/3 of the tank length.
  • As a filtering element inside is poured lathe waste (chips).
  • At the output end a strainer is installed.

You can make a filter element freeing compressed air from moisture for high-quality painting garage equipment on the second option, using silica gel.

  • 0.65. 0.7 m long piece of pipe with a cross-section of 100 mm.
  • sheet metal (thickness 3 mm);
  • metal grid;
  • fire extinguisher used;
  • fasteners.
  • Cut off a piece of pipe with straight edges of the length of 50-55 cm.
  • From one edge (this will be the top), a rectangular notch of 10×5 cm is made on the wall of the pipe. The hole should overlap the mesh and be guided by its size.
  • The same cut is made diagonally on the other side of the pipe.
  • On both cutouts fit two pieces of mesh and tack welded so that the upper edges of the insert and the body strictly coincide.
  • The hollow tube cylinder that remains is cut lengthwise in half with an angle grinder.
  • These fragments are put on top and welded thoroughly strong seam.
  • Since the iron is quite thick, for welding work is better suited to manual arc welding. It is much better than the same semi-automatic welds on the iron.
  • Should create a cylindrical construction with semi-cylindrical bulges on both edges.
  • The cap on the extinguisher is unscrewed.
  • The neck and threads are cut off.
  • The cover of the fire extinguisher is removed from unnecessary parts. All holes in it are plugged tightly.
  • This cut off part with a thread is welded to the top edge of the future filter.
  • For a stable position with the opposite (lower) edge of the construction is equipped with the base: a piece of iron 35-35 cm in size or other parameters welded to the bottom of the filter.
  • To close the semi-cylindrical protrusions from the bottom and top three fragments in the form of a semicircle are cut out of metal. The curved edge of the rounded edge must match the diameter of the pipe. Ensure that the semi-circular parts fit tightly to the pipe and cover the areas that are not welded.
  • To fix the pads, you cut holes in two of them for bolts (the ones at the top). The third (blind) piece is welded to the bottom.
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As a result, we get a device, which contains in its upper part a filler neck and a reducer. At the bottom. the connection pipe for the air intake. The entire structure rests on a stable base. It is necessarily checked for leaks by connecting a compressor. With normal output, silica gel is poured into the throat up to the mark of the lower edge of the upper grid. The hoses are connected and the dehumidifier is ready to work.

Self-made dehumidifier is an inexpensive option to remove condensate from the air flow and improve the quality of work.

Compressor Dryer Grading

Basically, the units use two basic operating principles: cooling and adsorption. But there are also other varieties of dehumidification for compressors:

  • with increasing outside temperature;
  • without heating;
  • with internal heating;
  • additional heating and mechanical ventilation, pr.

Selection of a dehumidifying unit is carried out taking into account dew point value at a given pressure, as well as characteristics:

  • external air and water temperatures, with water cooling.
  • the air pressure at the outlet;
  • maximum volume of the treated air (m.cube./min);
  • intensity of operation;
  • applications;
  • prices.

self-made desiccant with silica gel purification

To make this type of dehumidifier, you will need a used water filter, and preferably an oil filter, and silica gel. The main difficulty in making this apparatus with your own hands is to place the silica gel layer correctly.

Order of operation:

  • disassemble the used automobile oil filter into its component parts;
  • Check the condition of the nozzle that previously supplied oil to the filter. If it is in satisfactory condition, it may well be made the point of entry for air into the dehumidifier chamber;
  • inspect the filter for additional holes that could compromise the product’s airtightness, and remove them with silicone sealant or bolts and gaskets;
  • repeat step 1 in reverse order;
  • pour silica gel into the empty spaces to fill them completely;
  • fasten the upper filter cover with the bolt;
  • if you need it, weld brackets to secure your desiccant at a convenient location.

electric absorbers. condensate.

they work the same way as domestic refrigerators, that is, they have an evaporator, called a cold heat exchanger, a compressor (pump), and a heater, which in refrigerators is on the back wall. From the evaporator, the water drains into some kind of container. That is the same process of moisture condensation that takes place there as on the windows that are constantly sweating in humid places. The water collected in the drip tray drains down the drain or is thrown outdoors, just like in air conditioners. The dehumidified air passed through the evaporator is blown by the fan to the hot heat exchanger where it is reheated to room temperature. The dehumidified and heated air is then sent back into the room.

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The electrical absorber can be used to completely dry the air in the room

Thus, a household dehumidifier eliminates dampness to such an extent that the air in the room can be completely dried. But this should not be allowed. That’s why factory-installed units always have a humidity controller at the outlet. When it reaches the lowest normal operating point, the dehumidifier automatically shuts down.

They are ideal for apartments and do not require electricity, the removal of moisture from the air mass occurs in them passively. There is a special dehumidifying tablet inside this device, which intensively absorbs moisture from the air and retains it reliably. This tablet sucks the moisture out of the air. A salt solution is formed, which flows into a small tray and must be periodically emptied. The process is much slower than in the previous type of device, but there is no electricity consumption, and over-drying of the air will never occur. Salt tablets are very economical, one piece is enough to dehumidify the air in a 20-meter room for two to three months. That is, such a household moisture absorber needs to be recharged every 2-3 months.

Absorbent dehumidifiers are ideal for use in the apartment

If you are going to buy an electric household dehumidifier, keep in mind that they differ from industrial dehumidifiers primarily by their lower capacity. A domestic appliance is not designed to pump more than 25 liters per day.

But many people wonder if and how to make a dehumidifier with their own hands? Turns out it’s not hard at all! Based on the fundamental difference between household devices, you can build a dehumidifier for the apartment with their own hands of both types.

What kind of dehumidifiers are there?

You can control the temperature and humidity in a trivial way. regularly ventilate the room. It works when the temperature outside is 30 and over, but if it rains constantly, you should use store dehumidifiers.

There are four types of dehumidifiers that can be used in your home:

  • Adsorption dehumidifier. This kind of dryer works thanks to the adsorbent that fills the device.
  • Evaporative or compression. Moist air settles on the cold surface, where it turns into liquid and, flowing down the tube, is collected in a special container. The lower the temperature, the more efficient the process. In the warm season, the technique can cause inconvenience, as the atmosphere in the room changes by several degrees and becomes higher.
  • Membrane. The device is designed to dry a small volume of atmosphere. The essence of the device is the following: water molecules are removed at the moment when compressed air passes through the membrane. The main advantage of this class of technics is absence of connection to a network, compactness, the diverter for gathering a condensate is not used. The disadvantage is a natural air loss of up to 20%.
  • Assimilation. The principle of operation here is the following: when warm air is displaced, it is replaced by cool air. It is in it much less moisture by the laws of physics. The disadvantages are its low efficiency (not suitable for cold and humid climates), it consumes a considerable amount of energy, and is more expensive.

The consumer market is diverse, both technically and financially. Everyone can pick up a great option in the store and dehumidify the air in the room. And someone does not like industrial heat exchangers, and wants to make the device himself.

What is the threat of high humidity??

Everyone knows that dryness leads to drying of the mucous membranes, which because of the dryness get micro-injuries, thus opening an easy way for harmful microorganisms to enter the body. But the consequences of a high concentration of moisture are no less threatening. These include:

  • Decrease of immunity, it becomes the cause of very frequent colds;
  • Deterioration of breathing, allergic reactions due to various irritants;
  • feeling unwell in the abnormal summer heat, when it becomes very difficult to breathe;
  • Gradual destruction (deformation) of furniture, peeling of wallpaper, deterioration of parquet;
  • Problems with other finishing materials: flooring, plaster or drywall;
  • Possible failure of household equipment due to short circuit;
  • permanent window fogging;
  • “seizure” of the house by mold.
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For the last living menace, the ideal conditions will be high temperatures and the same humidity. above 20 ° and about 80% respectively. The fungus grows with a fairly high speed, so soon people find the enemy. The success of the fight against it depends on what areas have managed to reclaim mold.

There are many reasons that lead to these consequences, but the most common ones are. This:

  • Absence of an exhaust hood in the kitchen;
  • poor quality (clogged) ventilation system;
  • Violations made during the installation of thermal insulation;
  • installation of airtight double-glazed windows, infrequent, insufficient ventilation of the rooms;
  • Improper waterproofing, especially for residents of the first floors of apartment buildings;
  • Availability of large vessels in the house. bathtub, whirlpool, mini-pool, their frequent use.

Daily washing, drying laundry in the room can also greatly affect the level of humidity. If you have one or more of the above factors, a dehumidifier is a must for those who own a house/apartment. Especially if the area has high humidity.

How to choose the right room dehumidifier

Pay attention to the size of the tank where the condensate will be gathered

There is a wide variety of models of household dehumidifiers in appliance stores and in IM stores. They have different characteristics, design, size, installation method and, in addition to dehumidification, complemented by other, useful in everyday life skills. How not to be confused and buy exactly the appliance you need? To make the right choice, you should consider the following parameters when buying:

The capacity of the device. The capacity of freon dehumidifiers varies from 10 to 40 liters per day. As a rule, a manufacturer specifies in the manual the area of the room the dehumidifier is designed for. This also includes the amount of electricity consumed. Water Drainage System. The dehumidifiers are usually equipped with a drainage system or a condensate collection bottle, and some have both. When choosing a model with a reservoir, remember that the collected liquid must be drained regularly, otherwise the unit will stop working

Choose your own comfortable tank size. Temperature range It is important to pay attention to this point, because the dehumidifiers have a very wide temperature range in order to be able to operate at all temperatures.к. Not all models are effective at low room temperatures. Extra features (the price of the device depends on their availability: purification, ionization, aromatization; ability to choose an operating mode; built-in hygrostat, which allows you to constantly control the humidity level, reduced noise level, automated control, etc.).

You have to consider individual circumstances, like temperature range, level of humidity, its sources, etc. The right dehumidifier will be indispensable in the fight against moisture and will help to create a comfortable microclimate in your home

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