Mixing fresh air with air conditioning. Channel air conditioner for an apartment: the principle of operation and do-it-yourself installation Split system with forced ventilation

Difficult air exchange is one of the actual problems modern buildings. This is especially true for residential and administrative buildings built in the 70s and 90s. last century. The reason is the lack of effective centralized systems supply and exhaust ventilation and difficulty in natural air exchange due to replacement wooden windows on sealed PVC windows. Due to a violation of normal air exchange, a limited amount of oxygen enters the room, which entails a decrease in efficiency and a deterioration in well-being.

Installation wall-mounted air conditioners with air supply from the street effectively solves the problem of difficult air exchange and ensures the supply of fresh air into the room from the street. Studies have shown that when using air conditioners with fresh air from outside reduces the content of CO2 in the air by 2.5 - 3 times.

Traditionally, classical wall systems did not provide for such an option as fresh air from the street (unlike duct-type systems). The first device of this type appeared in the Daikin "Ururu Sarara" line. The system proved its effectiveness in practice, and subsequently similar models of devices appeared in other manufacturers of climate equipment (Haier, Hitachi and others).

How to choose the type of product in question

Most of these devices with an air supply function belong to the segment of medium or premium models. In addition to this function, they are equipped with inverter compressors and have a multi-stage air purification system from various pollution and impurities.

In addition to the traditional indicators of cooling and heating power (and, accordingly, the area for which the device is designed), for air conditioners with the function of inflow of fresh air from the street one more indicator matters - productivity (or maximum air consumption). The optimal indicator is considered to ensure the replacement of the entire volume of air in the room within 2-3 hours of continuous operation of the air conditioner.

Buy high-performance and multifunctional air conditioners with air supply at the lowest prices you can in our online store. In the catalog you can find expensive models premium class leading Japanese brands, as well as more budget models of Chinese and Australian manufacturers of climate technology.

February 2019

What kind of air blows the air conditioner?

"The air conditioner blows air that it takes from the street." This is a common misconception. Perhaps with these words we can begin this article. Every second client believes that since the air conditioner has an external unit 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, you could observe that a route is stretched to the outdoor unit from the indoor one, which consists of:

copper gas and liquid tube for freon;
a tube for drainage (when condensate is removed to the outside);
cable for interunit control and power supply.

As you can see, when installing an air conditioner, air ducts are not laid that can supply atmospheric air into the room. In other words, the air conditioner passes room air through the indoor unit, which is cooled by passing through a thin plate heat exchanger.

Communications to the external unit only serve to remove heat, and not to supply air from the street to the room. Split system is not a ventilation unit!

In the outdoor unit, freon is compressed by a compressor, the condenser is blown by a fan to remove excess heat, and already liquid freon is supplied to the indoor unit to evaporate and cool the room.

But there are exceptions! And more about them below.

How is air supplied to the room through the air conditioner?

The most efficient supply of fresh air is carried out by ducted air conditioners and cassette split systems. Structurally, in these types of air conditioners, it is possible to connect air ducts to take fresh air from the street. Duct air conditioners with supply ventilation do not provide 100% supply of air passing through them from the street, but they do exactly mixed: the volume of air left in the room from the street reaches a maximum of 30-40%.

Indoor unit of duct type with an air duct connected to it for supplying fresh air.

Adapters for grilles through which both cooled and fresh air will be brought into the room.

Decorative grilles for distribution of air from the channel conditioner on rooms. They can also be ceiling-mounted.

An air duct is connected to the indoor unit, which takes in atmospheric air from outside the room and provides a more comfortable environment compared to a conventional air conditioner without fresh air supply. But so that street dust, soot, leaves do not get into the room - filters are installed on the way. And for the possibility of heating cold (in winter time) air - heaters. All this economy must also be "stretched" through the air duct, which exerts resistance, which is why the implementation of such a ventilation scheme requires a calculation for resistance and an assessment of the possible volumes of air from the street into the room.

And now the purified air enters the heat exchanger of the indoor unit, and then through the air ducts it is distributed to ventilation grilles by premises. You can get more detailed information from the sections of our website or by consulting a manager.

One drawback of duct and cassette air conditioners with air admixture: their installation is possible at the stage of repairing the premises, because the installation of indoor units and the laying of a freon circuit with air ducts is carried out covertly (under the ceiling or sewn into the space between the walls). For those who want to experience the beauty of forced ventilation combined with air conditioning, there are only a few models. The best of them are presented below.

Models of wall-mounted split systems with a supply ventilation function

AT recent times several Chinese manufacturers have appeared on the climate market, which have expanded their line of air conditioners with supply ventilation. We would not recommend considering this option: the level of technical solutions in these split systems is far from perfect: high level noise, low air inflow values in cubic meters etc. At first glance, a simple function, few people managed to implement in domestic split system. Even Panasonic was forced to abandon the sensational XE-DKE series in 2007-2009, removing it from production as inefficient.

Air-fed air conditioners are becoming more and more popular and there is one leader in the HVAC industry, the Japanese giant Daikin.

Air conditioners Daikin with air admixture

If Hitachi is (was) the most popular, then Daikin is the most advanced model to date! The Ururu Sarara series of air conditioners with fresh air is a state-of-the-art system that is designed to improve the quality of life modern man in the conditions of the city new level! That was the goal of Daikin's Japanese engineers.

Combining the functions of cooling/heating, humidification/dehumidification, ventilation, air purification and oxygen enrichment in one unit provides an unsurpassed level of comfort. In your city apartment you will breathe clean air with optimal level humidity, oxygenated air. This split system is far from cheap, but with its help you improve your sleep, well-being, and get sick less. This is both an air conditioner and an air purifier - two in one!

To learn more about the series of air conditioners with air supply: UruruSarara series air conditioners.

Fresh air from the street enters the filter in the outdoor unit, through which it enters the blades of the cassette made of zeolite (a hygroscopic material that provides moisture transfer), which in turn supplies air to the heating zone, thereby increasing the humidity of the air supplied to the room. In automatic mode, the air conditioner will independently select the optimal humidity.

Air is supplied to the room through a special reinforced hose included in the delivery set and designed for a length of 8 meters. Made from antibacterial material. The air supplied to the room undergoes the finest cleaning:

dust, pollen, exhaust gases - everything is retained by a coarse filter and a catalyst at the first stage, before air is supplied to the indoor unit;
Titanium dioxide photo catalytic filter ensures the destruction of the membrane of odor molecules, spores, mold and viruses, followed by decomposition into harmless amino acids. The filter is recoverable!
streamer discharge (cold plasma) destroys the remnants of viruses and bacteria, providing a clinical cleanliness in your home!

The rest of the features of this air conditioner (timer control settings, flow control, easy cleaning, 3D airflow, wide-angle blinds, turbo mode, safety and durability, etc.) can be written for a long time. But we can briefly characterize this model: it is perfect. The best conditioner not yet invented by any of the manufacturers.

air conditioner
domestic air handling unit

Similar schemes have been implemented at dozens of our facilities. You can learn more about this option of air conditioning and air supply on the pages of our website in the article Air conditioning and air handling unit

Another option, as already mentioned above, would be to install a ducted air conditioner with an air outlet to take in fresh air from the street. When implementing such a scheme, it is often installed in the duct after the intake grate duct fan(to ensure the proper volume of air supply to the indoor unit of the split system), filter (for air purification) and heater (if necessary, heat cold air in winter).

Modern climatic conditions force humanity to look for new sources of air purification. apartment buildings practically sealed and do not have effective ventilation. In this regard, the concentration of oxygen in the room decreases and, accordingly, the mental and physical activity of the inhabitants decreases.

The only solution for today is the creation of forced ventilation. The premises are equipped with special devices with supply air valves. Such air conditioners with air flow from the street usually deliver no more than 40% of the air into the room.

Need for fresh air

It's no secret that fresh air is vital to maintaining health. Therefore, manufacturers in the field of climate technology began to pay more attention ventilation problems. Every living being needs oxygen, but due to the pace of modern life, people forget to take care of themselves, which leads to poor health and disease. Purchasing an air conditioner with a fresh air intake mode will make it possible to work effectively throughout the day in a closed room.

Why you need constant micro-ventilation:

Constant air changes increase the level of oxygen in the room.
Oxygen has a positive effect on metabolism and the functioning of the respiratory and immune systems.
There is a stabilization of pressure and the work of the heart improves.
Thanks to oxygen, stress levels are reduced and the brain works more efficiently.

Consequences of lack of oxygen:

General well-being worsens, malaise appears.
The pressure rises and the headache increases.
There is irritability and constant fatigue.

A modern air conditioner performs not only a function. It simultaneously serves as a cleaning system, a heating device, and can supply air to the room.

The main task of the split system is to provide comfortable living conditions.

Types of split systems with admixture

The air conditioner with air flow from the street differs from the classic split system by the presence of a separate air duct. Models of this type differ from each other in the structure of this channel.

Consider the types of air conditioners:

With membrane. Such an air conditioner is equipped with a membrane, it is she who is responsible for the operation of the channel. Feature: uneven throughput. The membrane is designed so that oxygen passes through it better than other gases. Such devices are quite expensive and rarely found on the market.
Modular system. This is an addition to existing system in the form of a heat exchanger with an air duct. It is equipped with an outdoor unit and is installed outside the room next to the air conditioner. The module has two tubes through which air exchange and thermoregulation take place. Minus: overall outdoor unit and low air exchange. The modern market almost does not sell such designs, since they are significantly inferior to their counterparts.
Modified outdoor unit. This solution is the most logical and is a combination of cooling and ventilation units. Between the outer and inner parts of the air conditioner, an air duct channel is installed for supplying oxygen. Minus: high cost and average air exchange (the amount of ventilated oxygen is calculated for the presence of only one person in the room).

The price of air conditioners with air flow from the street starts from 30 thousand rubles. and depends on the required functionality.

Also on sale you can find modifications of these types of systems. But all of them have a drawback - a low rate of air exchange. Channel systems give a better result, but their installation is difficult for an ordinary apartment.

Duct split systems

Hitachi outdoor air conditioner

The most popular among the products of this manufacturer is the Air Exchanger series. These air conditioners are also distinguished by the presence of a modern Nano Titanium filter, which is able to capture, in addition to dust, formaldehyde and bacteria, as well as purify the air from odors.

When the night mode is on, the air conditioner independently regulates the temperature and humidity in the room. The system has a built-in pollution analyzer that provides information about the freshness and purity of the air.

Principle of operation: when laying a freon route, a hose is additionally installed to supply air masses. The outdoor and indoor units are equipped with oxygen supply fans. Due to this design, additional noise is created in the room.

Such air conditioners have an inverter type of control. This ensures the economy of the models and the smooth operation of the device.

Features of air conditioners Hitachi:

High work efficiency.
Inverter power control.
Nanoparticle filter.
Ozone-safe 410 freon.
Opportunity to work in a wide range temperatures.
Micromesh fine filter.
Air quality sensor.

Air conditioners Daikin with air admixture

Among Daikin products, the Ururu Sarara series is popular. it modern models equipped with the latest technology. Air conditioners are quite expensive, but one such device can replace several. These are not just air conditioners, but at the same time effective cleaners and humidifiers.

Feature of the models: the system that is responsible for the air supply is located in the external unit, which minimizes the noise of the operating device.

Principle of work: air masses from the street pass through the filter located in the external block. Then they enter the blades of the cassette made of zeolite (a hygroscopic material that ensures the transfer of moisture), which direct the air into the heating zone.

Peculiarities:

In automatic mode, the split system independently regulates the humidity in the room.
The kit includes an 8-meter reinforced hose, which is made of antibacterial material.
The air passes through the finest filters.
Timer management.
3D airflow.
Turbo mode and wide-angle blinds.

Usually, when using an air conditioner, we lose the opportunity to ventilate the room, giving preference to cooling. Unlike conventional wall models, which are designed for processing and cooling, air conditioners with air supply able to replace it from the outside. Thus, the problem of poor ventilation is solved, enriching the room with the necessary oxygen, and as a result, well-being improves, people's working capacity increases. Today, the best climate companies are solving the problem of ventilation, releasing models with an inflow, or as they are also called, with an air mixture of up to 20%.

Companies producing fresh air conditioners

The first air inlet was developed by Daikin, which released a series of climate equipment called "Ururu Sarara". In the future, similar models appeared from other manufacturers, such as Hitachi, Haier, etc.

Air conditioners with air mixing function belong to the premium class category.

Basically, these are inverter split systems with a highly efficient system for cleaning the air masses coming from outside from various impurities and contaminants. Having decided to buy an air conditioner with an air admixture, in addition to the main parameters, you should also pay attention to its maximum air consumption. The best option the ability of the air conditioner to replace the entire volume of air within two to three hours is considered in the conditions of its uninterrupted operation.

In this section of our online store are presented best models air conditioners with admixture or with air inflow. Our managers will help you choose and buy a supply air conditioner that best suits your room.

In the conditions of modern hermetic apartments, issues related to inefficiency are increasingly arising, namely, the lack of inflow of street air masses. Due to the lack of fresh air in such rooms, the oxygen content in the air mixture is significantly reduced, which leads to a sharp decrease in the mental and physical activity of the people in it.

Today, this problem is solved by creating a forced

Equipment of premises with ventilators and wall supply valves, as well as specialized climatic equipment - air conditioners with an influx of fresh air. In fairness, it should be said that it is more correct to call this equipment not with an inflow, but with an admixture of street air, and the volume of air masses supplied to the room usually does not exceed 40%.

The device and principle of operation of the air conditioner with inflow

with an influx of fresh air various designs. The most popular among our compatriots are models with a wall and channel arrangement of the indoor unit. The device of such climate systems is not much different from standard air conditioners, with the exception of the air duct that combines the indoor and outdoor units and the filtering system for the incoming air mixture. Channel air conditioners of this type are most often equipped with an electric or water heater, which heats the incoming air flow during the off-season.

An air conditioner with forced ventilation mode for an apartment consists of:

Evaporative (internal) unit, which includes a heat exchanger, a fan, a filtration system, and an electronic control unit.
An outdoor unit including a compressor, a condenser heat exchanger, a cooling fan and an additional suction turbine, as well as a mixing chamber.

The mixing of air masses occurs as follows: by means of a suction fan, fresh air is supplied through the duct to the evaporation unit, where it enters a special chamber and mixes with the air from the room. After that, the air mixture passes through the filtration system and undergoes additional processing (heating, humidification, dehumidification, etc.), which depends on the version, the set mode and the model of the split system. Only after processing the air mixture is fed into the room. Microprocessor control allows you to automatically control the parameters of the air mixture specified by the user, as well as the strength of the air flow.

Scope and advantages of split systems of this type

Air conditioners with a function are most often used in residential hermetic buildings equipped with modern plastic windows, as well as in rooms with special requirements to air exchange and the quality of the air mixture.

The main advantages of an air conditioner with an influx of fresh air are:

Year-round supply of serviced premises with an influx of fresh air. The competent approach of manufacturers made it possible to create such climate equipment that can work even at low temperatures.
High degree of purification of street air. An open window will give the necessary influx of air masses, but its quality, especially in a metropolis, leaves much to be desired. Split systems are equipped with efficient filter elements, thanks to which clean and fresh air enters the room.
Microprocessor control makes it possible automatic maintenance given temperature and humidity characteristics and performance of the device.

Factors to pay attention to

Despite the rather serious advantages of such, air conditioners with forced ventilation for an apartment have not become particularly popular with our compatriots, and there are several explanations for this:

Increased noise level, the source of which is an additional fan. From Russia, the noise level is regulated by sanitary standards, which clearly state that the level of penetrating sound exposure to residential premises cannot be higher than 30 dB at night. Most of the common models of such climate technology have an indicator on the verge of this value.
A household air conditioner of this type cannot fully replace the ventilation system.
High price. The price of such a device is approximately 15-20% higher than that of inverter-controlled climate control equipment of similar power.

The choice of a split system of this type should be entrusted to professionals, since the implementation of proper air exchange and synchronization ventilation system with an air conditioning system is possible only with proper calculation and assessment of the required volume of supply air.