Air-conditioning devices can be much more diverse than it seems for non-professional. This is a bright example – appliances of channel type. She deserves a thorough parsing and attentive acquaintance.
Device and principle of operation
To begin with, it is worth understanding exactly how the channel air conditioner works. The essence of his action is that air masses are transmitted using special mines and air ducts. The hardware is mounted as an integral element of the air duct complex, and not just attach to them. Hence the conclusion: Planning and making installation work should be made at the construction stage. In extreme cases, it is permissible to perform these works at the same time with overhaul.
The outer part of the air-conditioning device takes the air from the street, and then it is pumped to the inner block using the air duct. Along the way, cooling or heating air masses can be carried out. The standard scheme takes into account that the distribution of air on the highways is not to create. Sufficient effectiveness of this system ensures the use of high-power fans. Air cooling is achieved due to the heat exchange part of the evaporative device.
But the heat taken away from the air must be deleted somewhere. This task is successfully solved using a heat exchanger connected to an external block capacitor. Channel air conditioners are in demand in shopping centers and shop. Subject to competent installation ensures the minimum level of extraneous noise. Part of the channel equipment is designed to use water to remove heat. These are more powerful solutions and their cost is large enough, which limits the use in practice.
Pros and cons
Air conditioning devices On the basis of channel communications differ from other types:
- increased air productivity;
- the possibility of using several blocks at once;
- the possibility of removing individual blocks, if there is no need;
- quite high reliability even in difficult conditions;
- suitability for maintaining optimal conditions immediately in several rooms at the same time.
However, it must be borne in mind that such complexes:
- It is more expensive than most household and even professional analogues;
- there are high demands on the skill of designers;
- much more difficult when installing than other air-conditioning devices;
- In case of errors, the execution and placement of the components may be noise very loud.
Channel type equipment is quite expensive. Especially if you buy not the first machines, but carefully select them under your need for a reserve. Cost increases when adding each additional block. Mount the channel air conditioner and connect it without attracting professionals is generally impossible, because you have to spend money also on their services.
Start an overview appropriate with high-pressure calorie format air conditioners. Such devices can create overpressure up to 0.25 kPa. Therefore, it turns out to ensure air pass even in large rooms with abundant branching. These include:
- Lobby of commercial buildings;
- trading complexes;
- office centers;
- medical institutions.
Some high-pressure systems can work with fresh air influx. Mixing added air mass – a rather difficult task in engineering. The overwhelming majority of the devices manufactured now are designed only for recycling. In order for the complex to work with the supply ventilation, you have to use special heaters of the incoming air. This option is especially important in Russian conditions, and the farther north and east, the requirement of significant.
The total power of heating elements sometimes reaches 5-20 kW. This value affects not only the climatic characteristic of the area and the required thermal mode, but also the number of modules installed. Therefore, it is necessary to use powerful wiring, otherwise the risk is great if not fires, then constant failures. Channel split systems with medium air pressure cannot guarantee the pressure of more than 0.1 kPa.
This characteristic is considered sufficient for household needs and for individual production, public and administrative premises of a small area.
Low is considered pressure not exceeding 0.045 kPa. Systems calculated on such parameters of the work are used mainly in the hotel. Important requirement is introduced: each air sleeve should not be longer than 0.5 m. Therefore, it turns out to cool or warm the air in some one small room and no more. According to some classifications, the low pressure threshold is recognized as 0.04 kPa.
In our country, you can purchase a channel air conditioner at least 60 different manufacturers. Among the inverter split systems is beneficial Hisense AUD-60HX4Shh. The manufacturer guarantees an improvement in air condition to 120 m2. Provide power regulation in smooth mode. Design allows you to press up to 0.12 kPa. The permissible amount of passing air reaches 33.3 cubes. m for every 60 seconds. In the cooling mode, thermal power can be up to 16 kW, and in heating – up to 17.5 kW. Special mode is implemented – air pumping for ventilation without changing the air temperature.
Optionally, you can use the mode of supply mixing, and air drying. Available option for automated temperature maintenance and self-recognition. Commands of this channel air conditioner can be served using the console. Designers have provided a timer to start and disable the device. To move heat uses the cooling agent R410A. This type of freon is safe for humans and for the environment. Connect the device only to three-phase power grid.
Unfortunately, there is no particularly fine air purification. But you can adjust the rates of rotation of the fans. It turns out and change the direction of the air jet. Internal protection from the formation and accumulation of ice is provided. If necessary, the device will remember the settings, and when it disabilities, will resume work with the same modes.
If inverter channel type air conditioner is required, an alternative may also be Mitsubishi Heavy Industries FDUM71VF / FDC71VNX. Curiously execution: there is both outdoor and ceiling components. Thanks to the inverter, a non-timbble power change is maintained. The maximum allowable duct length is 50 m. The main modes for this model are cooling air and its heating.
A minute stream in the air duct can reach 18 m3. When the air conditioner cools the atmosphere indoors, it spends 7.1 kW current, and when it is necessary to increase the temperature, 8 kW is spent. Expect to function in the mode of the supply fan no sense. But consumers will please the modes calculated on:
- automatic temperature retention;
- automatic diagnostics of problems;
- operation at night;
- Drying air.
Volume when working in the inner unit does not exceed 41 dB. In the least noisy mode, this indicator is limited to 38 dB. The device can be connected directly only to single-phase power grid. Air purification on a thin level is not provided. The system is able to diagnose the discovered problems and prevent ice formation.
As it should be a good modern technique, Product from Mitsubishi can remember previously specified settings. The smallest outdoor temperature at which the cooling mode is supported – 15 degrees. 5 degrees below the mark, after which the device will not be able to warm the air in the room. Designers took care of the possibility of connecting their product to smart home systems. Linear dimensions of the inside of the channel air conditioner are 1.32×0.69×0.21 m, and in the outer part or a window compatible block – 0.88×0.75×0.34 m.
Another noteworthy apparatus – GENERAL CLIMATE GC / GU-DN18HWN1. This device is designed to connect to air ducts no longer than 25 m. The largest static pressure level – 0.07 kPa. Standard modes are the same as the previously described devices – cooling and heating. But the bandwidth is slightly higher than that of the Mitsubishi product, and the 19.5 cube is equal. M. in a minute. When the device warms the air, it develops thermal power of 6 kW, and when cold 5.3 kW is cold. Current consumption is 2.4 and 2.1 kW of current, respectively.
Designers took care of the possibility to ventilate the room, without cooling and not heating it. It may also automatically maintain the required temperature. Timer shutdown or inclusion. Volume level during operation is not regulated, and in any case, 45 dB maximum. The paper uses an excellent safe refrigerant; The fan is able to spin at 3 different speeds.
Still very good results can show CARRIER 42SMH0241011201 / 38HN0241120A. This channel air conditioner is capable not only to heat and ventilate the room, but also save the homely atmosphere from excessive humidity. Maintaining air intake occurs through a special hole in the housing. Comfortable to work with the device helps the control panel entry. The recommended serviced area is 70 m2, while the air conditioner is able to work from the usual household power supply, and a small thickness allows you to embed it even into narrow channels.
Tips for choosing
But correctly select the channel ventilating device for the apartment or for the house, just getting acquainted with the information provided by manufacturers, it is extremely difficult. Rather, it is possible to make a choice, that’s just it is unlikely to be correct. It is necessary to pay attention to the reviews of other consumers. It is their opinion that allows you to identify the strengths and weaknesses of each option.
Completely the right choice will help to make only consultations with qualified specialists.
For obvious reasons, it is better to apply to independent engineers and designers, and not to those that the manufacturer, dealer or trading organization offers. Professionals will take into account:
- glazing characteristics;
- area of glazed space;
- total serviced area;
- target premises;
- Necessary sanitary parameters;
- availability of the ventilation system and its parameters;
- method of heating and technical properties of equipment;
- The level of heat loss.
The correct calculation of all these parameters is possible only after studying the features of the object itself and a number of measurements. Sometimes you have to use special software for designing air ducts and selective channel equipment. Only when the necessary properties of channels, the need for air intake and optimal installation locations, can be taken for choosing the air conditioner itself. It does not make any sense for this choice without a project – it’s easier to throw money into the wind in the literal sense. Also need to pay attention to:
- Current consumption;
- thermal power;
- the possibility of drying air;
- contents of delivery;
- Availability of timer.
Installation and operation
When the equipment is chosen, you need to know how it is performed correctly. Of course, the work itself is performed by professionals, but it is absolutely necessary to control their actions. Selecting the place to install the air conditioner, you need to focus on such requirements as:
- limit level of noise insulation from residential and industrial premises;
- Maintaining temperatures at least +10 degrees (or enhanced thermal insulation of the indoor unit);
- Approximately the same length of all ventilation channels (otherwise, more or less strong temperature differences will occur through the air duct).
In private homes, the optimal point for connecting the channel air conditioner is the attic. Of course, in the event that it is heated or at least equipped with reliable thermal insulation. You can put an external unit at any convenient location. Facade, and roofing. But given the increased mass compared to typical split systems, it is advisable to choose an installation on the roof.
Next, you need to deal with what air duct is better. If in the first place there are considerations of minimal air losses, it is necessary to give preference to round pipes. But they absorb redundant place. In domestic conditions, the best choice is rectangular air ducts. Most often, they are packed in the interval from the rough to the facial ceiling, and it is necessary to do it before installing the air conditioner itself.
When only air conditioning is planned to cool the air, the pipelines made of polymeric materials become the optimal choice. If the consumer is going to warm up the room in winter, preference should be given steel. It should also be viewed that the size of the pipe coincides with the dimension of the pipes installed on the inside of the air conditioner. It is necessary to think about where to put wall lattices. They should effectively restrain any dirt, and there should be no interference to air movement from any items in the room.
All air ducts need to be done only from completely non-aggravated materials. Flexible corrugated pipeline – not the best solution. It will be saved in free areas, and everywhere where fasteners will appear, strong compression will appear. As a result, normal aerodynamic resistance is impossible to ensure. Both diffusers and lattices should be calculated on the movement of air at the limit mode at a speed of no more than 2 m / s.
If the flow becomes faster, a strong noise is inevitable. When, due to the section or geometry of the pipe, it is impossible to use a suitable diffuser, you need to correct the situation using the adapter. Where the air supply lines are branched down, areas with reduced internal resistance are equipped with diaphragms. This will allow you to limit the movement of air flows as needed and ensuring the required balance. Otherwise, too much air will be sent to low-resistance places. Very long ducts require the installation of revision hatches. Only with their help and you can produce periodic cleaning from dust, dirt. When the channels are packed in ceilings or partitions, immediately mount easily retractable elements that provide fast and easy access.
External heat insulation will help prevent condensate education. It is also necessary to remember that because of the low quality of street air without filters it’s just not to do.
- Cleaning pallets where condensate flows;
- cleaning (as needed) the tube on which this condensate flows;
- disinfection of all components in contact with the liquid;
- measurement of pressure in the refrigeration line;
- cleaning filters;
- removal of dust from ducts;
- cleaning decorative facial panels;
- cleaning heat exchangers;
- checking the performance of motors and control boards;
- search for possible refrigerant leaks;
- cleaning fan blades;
- removal of dirt from the housings;
- Checking the health of electrical contacts and wiring.
On how to properly care for the channel air conditioning, see the following video.