What air blows air conditioning?

“From the air conditioner blowing the air that he takes from the street”. This is a commaway. Perhaps these words can begin this article. Each second client believes that once the air conditioner has an external block outside the window, the air conditioner itself takes fresh air and supplies it to the room. If you were present during the installation of the air conditioner, then could observe that the external block from the inner stretch the track, which consists of:

  • copper gas and liquid tube for freon;
  • Drainage tube (when condensate output);
  • Multi-block and power cable.

As you can see, when installing the air conditioner, air ducts are paired, capable of submissive atmospheric air. In other words, the air conditioner passes through the indoor unit of the room, which passing through the thin plate heat exchanger is cooled.

Communications to the external unit just serve to drive heat, and not supplying air from the street to the room. Split system. This is not a ventilating unit!

In the outer block, the freon is compressed by the compressor, the capacitor is blown by the fan to remove excessive heat and already liquid freon is supplied to the inner block for evaporation and cooling the room.

160,000 rpm Spindle with Air Bearings

But there are exceptions! And about them. Below for details.


The device can be in the form of a monoblock or have a two-way design. The device is a closed system from itself, according to which the refrigerant is moving. most often freon R-22, R-410.

What is air conditioning:

  • The compressor is designed to compress Freon and ensure its movement to the heat exchanger;
  • The condenser is located in the removal unit, falling on the chilled surface of the heat exchanger, the refrigerant goes into a liquid state;
  • The evaporator. is in the inner case, absorbs heat, contributing to cold air in the room, turns the refrigerant to gas;
  • Pressure regulator (capillary tube, choke) performs the functions of a sharp decrease in P and T Freon;
  • Fan. generates an air jet aimed at heat exchangers.

Attention! The main elements of the design are present in any model of air conditioner.

Classic air conditioning scheme, its work is presented in the picture.

The air conditioner circuit in cooling mode clearly shows how during evaporation refrigerant absorbs, and during condensation gives it warm. The principle of operation of the air conditioner. the fence of thermal energy on one heat exchanger and the return on another is called a parocompression refrigeration cycle.

How air conditioning works?

The compressor receives freon in the form of a gas with a slight P 3-5 atm and T 10-20˚С. In the unit, the gaseous substance reaches a pressure of 15-25 atm with a simultaneous increase in T to 70-90 ° C.

The cooling agent under pressure moves to the condenser, where the fan covered with the fan and turns into a liquid, highlighting thermal energy. Air coming out of the condenser heats up. Cooling fluid leaves the heat exchanger with a temperature of 10-20˚ exceeding the ambient air.

In the throttle representing a thin tube made of copper in the form of a spiral, the temperature and pressure of Freon according to the laws of physics decreases, partially evaporated. After the pressure regulator, the mixture of vapor and liquid fractions of the refrigerant enters the evaporator.

The evaporator converts freon into a gaseous form with heat absorption. The air, driven by a fan through the evaporator cools and is supplied to the room. Low temperature and pressure gas is sucked by a compressor. The process is repeated.

note! The principle of operation of the air conditioner is based on the ability of the refrigerant to take and give heat in the transition from the gaseous fraction into a liquid state and vice versa.

What is fresh air?

Fresh air is air in which the concentration of carbon dioxide does not exceed the norm, no impurities, dust and gary. This indicator does not depend on air temperature. Fresh can be warm and cold air.

Objectively assess the quality of the air will help the device measuring carbon dioxide in the room. Optimal index carbon dioxide concentration indicators. up to 800 ppm. Often the level of CO₂ in residential premises and offices exceeded 1.5-2 times, only because there is no permanent air exchange. After all, for this you need to ventilate every hour to 15-20 minutes, and this is not always enough.

Even if there are few people in the apartment or in the office, but the windows are closed and there is no inflow of fresh air, carbon dioxide level will be exceeded. Subjectively, such a concentration is not felt like a stuff, especially if the air conditioner and the air is cool. Read more about carbon dioxide standards in the article “Carbon dioxide indoors: Regulations for GOST”.

So in the room to establish air exchange, you need to take care of the influx of fresh air from the street. One of these options is the installation of centralized air ventilation per ceiling, but it is not always convenient and budget, and for gasket air ducts will have to lower ceilings by 15-20 cm.

An alternative solution that will not require large financial costs and repair in an apartment or office will be the installation of brizers or supply complexes.

These devices, in contrast to the central supply ventilation, are better filtered by air and allow the settings of the microclimate indicators for each room separately.

We tell how to choose air conditioning for an apartment, on what characteristics and functions to pay attention to which restrictions to take into account and what else can do air conditioning, except air cooling.

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What is a brizer and how it is arranged, the principle of operation and the main functions. How can I solve the main problems of the microclimate of the room using a bizer.

The main standards for the concentration of carbon dioxide indoors, optimal and permissible values. How to ensure the optimal level of CO2 indoors.

Full overview of the AirNanny A7 air humidifier: the size and principle of the device, the filtration system, operation and control mode, performance, installation features.

We tell me what air humidity, the main norms of humidity in GOST, what kind of humidity is optimal for the bedroom, living room and children’s room and how to normalize it.

We will tell about what is fine particles where they are taken from what they are dangerous and what can be taken to protect themselves from their harmful effects.

Tell how to determine the relative humidity of the air and how to maintain it at the optimal level.

Full overview of the AirNanny A7 air humidifier: the size and principle of the device, the filtration system, operation and control mode, performance, installation features.

The main standards for the concentration of carbon dioxide indoors, optimal and permissible values. How to ensure the optimal level of CO2 indoors.

What is a brizer and how it is arranged, the principle of operation and the main functions. How can I solve the main problems of the microclimate of the room using a bizer.

We tell how to choose air conditioning for an apartment, on what characteristics and functions to pay attention to which restrictions to take into account and what else can do air conditioning, except air cooling.

Select device. How to look for and what to pay attention.

First of all, I want to say that on all top sites selling air conditioners, not the most convenient navigation. Information about devices is very difficult to find. It is necessary to get through the verbal jungle:

No objective data and numbers, quite general words that do not really talk about the product. But learn about what is sold for such a large amount, I really want.

Without finding the information you need on the device on the instrument, I called one of the companies to get a consultation of a specialist.

On the same day I did not answer the application. Call back to the next. The specialist was very polite and attentive, but incredibly confusedly embarrassed when I heard my question about which air exchange is providing air conditioning. It turns out that it is not interested in anyone.

I do not hide, when choosing equipment for the house at some point it is very easy to succumb to the impulse and believe in all pictures and promises, simply because to go into technical details for a long time, tedious and difficult.

Rate air quality and CO₂ subjectively very difficult. Cold air always seems fresh.

It is very important to understand that without the receipt of fresh air from the street in the room there will be constantly the level of carbon dioxide, even if only one person lives in the apartment. Devices for measuring the level of CO₂ are rare, it is enough to know a simple fact: if the room does not flow through the air through an open window or window. there is no air exchange.

Therefore, it is important to pay attention to how much air enters the room if you choose a device for improving the microclimate.

But back to the data received from a specialist from the first company. After some time, he called back and said that the air conditioner of the premium class with a substitution of fresh air provides an air exchange equal to 10 m³ / hour. For reference, it is about as much as an ordinary trim valve can give. And that, alas, not enough.

But this air conditioner carries out thin air filtration from dust, bacteria and microorganisms. It would be a shame if he didn’t do this for such a price, but it was interesting which filters are used to achieve this result.

On this question, the answer also followed not immediately. Filters in the air conditioner are not bad, but not the best. F3 “For coarse cleaning”, HEPA H11 and AK.

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What kind of battery did not succeed, as well as why F3 is used for coarse cleaning (this is a fine cleaning filter, not the highest filtering quality, but still). If you use F3 for coarse cleaning, it will quickly score.

To HEPA H11 Claims no, this is a good filter, although again, there are higher degrees of filtering, which I would like to see in the premium segment.

In general, the air conditioner body is not so big to accommodate high-quality coal filters and HEPA filters. This means that for safe operation, the filters will need to be changed very often, every 2-3 months.

Such low air exchange indicators confused me, because a competitor from the mass segment, with a cost of about 30,000, provides the best air exchange.

I wanted some confirmation of information in the form of specific documents, numbers printed on paper or decorated in the online document, and not just words. By the time of writing the article, the data from the first company (in the top search) were not received.

But I am not from those who quickly lowers hands, so I contacted another company. And again surprise and fright, search for information, silence. The third request got a rather fast response, fortunately.

I will explain what is here such a stinging signature: the numbers are too big. Probably, confusion and substitution of concepts occurred.

I asked a question, what is the diameter of the hole through which such a large volume of fresh air flows and clarified the question of how much fresh air enters the room.

I was surprised that through such a small hole such a powerful air exchange is possible. Apparently, my answer made to think and the question was redirected by the Technical Specialist:

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From the words of a technical specialist, my curiosity flashed even stronger. I clarified whether I understand correctly that the diameter is only 3 cm, and then I never know something confuse and 30 mm is not 3 cm, I am not a technician where I.

What little things really. Maybe the air conditioner can pay 17,000 instead of 170,000? After some time, I still waited for results and numbers.

There was a lot of doubt, but still. here is the data on the real air exchange, mined in a long correspondence between me and technical experts. Air conditioning with a segment of fresh air premium segment provides air exchange not more than 32 m³ per hour.

Positive and negative sides of the product

The main minus floor models of air conditioners without street removal lies in the fact that they are practically not cooled by air, only moisturizes. But if you have already bought a similar device, do not rush to get upset. try to find the real advantages of the product:

  • Full lack of installation. to start a household device, it is enough to turn on the outlet;
  • High mobility. the unit easily moves around the apartment or a private house;
  • low weight compared to freon “fellows”;
  • Economic consumption of electricity (until the TEN turns on);
  • availability. the price of the device is about 20% lower than a full-fledged cooler;
  • Silent work. design provides one fan instead of two.

Note. Together a water pump and an air conditioner fan consume energy literally on a penny. up to 200 W. But it is worth incorporating the heating mode, and the TEN will begin to “get out” at the meter 2-3 kW.

It must be recognized that the products under consideration have modern design and do not lag in terms of functionality. there are several modes of operation of the fan and pump, control of the heating temperature, digital display and so on.

Now about the negative points of operation of mobile air conditioners without an air hose:

  • No Pipe. there is no channel of removal of excess warmth to the street. Summer heat that penetrated the apartment from the outside, remains inside, no matter how much the climatic unit work in the maximum mode.
  • The device does not have a function of maintaining the temperature of the cooled room. It is not surprising. air conditioning does not highlight cold. Only heating temperature is controlled.
  • The feeling of coolness occurs in the first 10-30 minutes after the inclusion. Then the air is saturated with water vapor and becomes stuffy. No wonder the manufacturer recommends opening windows.
  • The internal reservoir must be replenished with water, preferably. very cold. Even better. laying ice or gel thermoaccumulators in the container, pre-frozen in the refrigerator. Which will also highlight heat into the room. it turns out a circular process.
  • Heating mode loses normal split systems on efficiency. TEN converts electricity to heat from efficiency 99% (one to one kilowatt). Split takes the heat outside and tolerates the inside of the room, spending 1/3 of electricity.

Advice. If you want to know how much ice is enough to cool the room, read the calculation in the instructions for the manufacture of the air conditioner with your own hands.

Situations in which the solution to the problem is only a specialist

Unfortunately, not all malfunctions arising during the operation of air conditioners can be solved on their own. In some situations, the help of the repair masters is simply necessary.

Freon evaporation or leakage

If there is a violation of the integrity of the system, Freon evaporates rapidly.Freon. substance, due to which climatic equipment cools the air. Even if the integrity of the system is not violated, it is normal, it evaporates from air conditioners to 7% per year. It is possible that for several years without maintenance, the split system lost a large number of freon.

After breaching the integrity of the system, the air conditioner begins to blow with warm air, and then stops turning on at all.

Solution: In the case of natural evaporation, a specialist conducts refueling by Freon. If there is a depressurization of the system, the master finds the place of failure, eliminates flow, and also holds refueling by Freonon.

Castle of capillary pipelines

Due to the zero of the capillary pipeline, there is a difference of pressures at the entrance and the output of the capillary tube. As the result, Freon evaporates, giving the cold before he goes into the evaporator. Cooling capacity drops, the compressor is attempting to compensate for it with its continuous work.

Solution: Depending on the degree of contamination of the capillary tube, it is either purified by purging or solvents, or replaced with a new.

Cleaning the switching valve

Switching valve controls the operation of climatic modes. If the technique has ceased to cool the room, then it cannot switch to cooling mode.

Solution: Valve Replacement. It is also possible to repair, after which the equipment begins to work only on cooling. It is much cheaper than replacement and profitable for those who do not need heating function.

In cases where there was a breakdown of other components of the air conditioner, they need their replacement for new: as a rule, they are not subject to repair.

Types of supply air conditioners

All air conditioners with air fence outside act on this principle:

  • When the user translates the split system into cooling mode, the function of the supply ventilation is turned on.
  • Outside air damper opens through the air duct, laid from the street into the room through the outer wall.
  • The fan picks up street air and drives through the filter. After cleaning, it is raised to the main airflow from the room, cooling and further processing. moisturizing, drainage, ionization (if there are specified functions).

Important clarification. In air conditioners of different manufacturers, the inclusion of external influx is implemented in different ways. We will analyze this issue below, in the review of each type of home coolers.

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Standard Split System Processes Air Indoors

In online stores of climate household appliances, you can find the air conditioners of the following types:

  • classic split systems with internal blocks of wall, outdoor (column) and ceiling mounting;
  • Window, mobile and outdoor wall coolers without an outdoor unit;
  • Channel air conditioning systems.

Briefly consider the device and the principle of operation of each of the listed aggregates.

Split Systems with Fresh Air Influx

Summary in “Split” We offer to explore the example of the Japanese climatic installation Hitachi RAS-10JH4 / RAC-10JH4. The price of the aggregate. from 43500 (675 y. E.), Specifications look like this:

  • Heating capacity. 3.4, cooling. 2.6 kW, serviced area. 25 m²;
  • Compressor type. inverter;
  • The total amount of the processed air is 510 m³ / h, the supply. maximum 25 m³ / h;
  • Additional features. humidifier, ionizer, ultraviolet and normal filter cleaner.

Air conditioner feature. the presence of an independent supply and exhaust fan included automatically or manually. Accordingly, an air pipe with a diameter of about 40 mm comes out of the internal module into the street.

How the split system works in automatic mode:

  • Special sensor measures the degree of air pollution of the room. Reacts to the lack of oxygen, various suspended particles, cigarette smoke. When the concentration of harmful substances reaches the installed threshold (you can configure), the sensor starts the fan.
  • The removal of contaminated air masses begins to the street, lasts 20 minutes. Then the discharge mode turns on, the fan takes the air from the outside and submits to the room through a special hole or together with the main stream, as shown in the diagram.
  • Fence / air emissions function independently of the air conditioning mode.

Clarification. With the cooling / heating is enabled, the inflow is mixed up to the total jet. If conditioning is turned off, the impeller of the fan drives the trim air through a special opening of the inner block.

The user can activate the ventilation manually by pressing the appropriate button on the remote control. One condition: the ambient temperature should be within 3 30 ° C, otherwise the damper will not open and the fan will not start. In this way, protection against condensate and electricity recalculation to heating or cooling the supply air is implemented in the split system. Brief overview of the device of another famous brand Daikin See on

Similarly, the operation of other double-block air conditioners with ventilation is organized. In most models, only the inflow is provided, automatically turned on with cooling (when heated. no). In cassette modules mounted in the center of the room, the ventilation mode is not provided.

Monoblock aggregates

Here we will analyze an example. wall-floor air conditioning with a flow of air Climer SX-25. In essence, this is a whole climatic station equipped with such elements:

  • evaporator, condenser and refrigeration compressor;
  • Recuperator for heat transfer from exhaust air influx;
  • Fan coil, connected to the water heating system of a private house or apartment.

Reference. Similar climatic installations are called central air conditioners. The cost of the Climer SX series monoblocks starts from 68200 (1050 y. E.).

Listed equipment plus the filter system and fans are built into a single case suspended to the wall above the floor, as shown in the photo. From the rear panel goes outside 2 pipes. supply and exhaust.

  • Clean and moisturize airflows before serving in the room.
  • Remove contaminated air from the room and simultaneously pump fresh.
  • Save electricity. Threads exchange thermal energy in the recovery (in winter. warm, in the summer. cold).
  • Working in the air thermal pump mode, while the street temperature (up to 5 degrees) allows.
  • Warm room using built-in fan coil connection to home heating.

As you can see, the supply ventilation is one of the numerous functions of the stationary monoblock Climer. The air conditioner SX-25 models also acquires a room to 25 m² and has a capacity of 400 m³ / h, the volume of the influx is 30 m³ / h. Power corresponds to “Split-nine”. 2.64 kW on cold, 2.78 kW heat.

The supply and exhaust mode acts in the air conditioner constantly (automatically turns on) or at the request of the user. The air is absorbed by the fan through one pipe with a diameter of 160 mm, thrown out of the second (Ø150 mm).

Of course, there are other, simpler and cheap mobile air conditioners with outdoor air fence. These are models with two air ducts that need to be outward (higher in the photo). The second pipe just serves for the tributary. What is interesting: the volume of the supplied air in any similar installations does not exceed 30 m³ / h.

Finally, Montazh

As a rule, assembly works are performed by masters. refrigerators with special equipment. a vacuum pump, a pressure gauge and a peuorator for drilling walls. But low-power models. “seven”, “nines”. can be mounted independently, taking the listed tool for rent.

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  • Place a street module under a window for convenience of service, internal put closer to the outer wall. Better to meet 3 meters.
  • Purchase copper tubes corresponding to the diameter of service ports located on the side wall of the housing.
  • So that when the compressor is working, the block does not vibrate and not buzzing, secure it to secure it on the wall bracket.
  • Thoroughly ruined copper tubes. the tightness of the system and the performance of “split” depends on it.
  • Do not place an external unit on a glazed loggia or balcony.

We will also advise you to carefully read the factory instruction of the air conditioner and familiarize yourself with our installation guide home cooler.