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Automation of air conditioning
Properly designed home climate system includes heating, air conditioning and ventilation systems. It is extremely important to establish their interaction to ensure the necessary environmental parameters. If this is not done, the situation may be when the radiator heats the air in the room to 24 ° C, the air conditioner tries to cool it to 22 ° C and dry it, and the ventilation system is set to enhanced operation at low humidity. The result - all systems operate at maximum power, the room is not getting to optimal climate.
To avoid such situations, it is best to provide centralized climate control in the home, for example, as part of the Smart Home system.
This solution has several significant advantages:● easy adjustment and change of temperature and mode of operation depending on the time of day and season● turning on the air conditioner in automation and scenarios together with other devices (for example, blocking work with the window open, or changing the operating mode depending on whether someone is in the room)● you do not need to configure several climate systems in the house and check whether their settings will not conflict with each other
The control of the air conditioner is significantly different from the control, for example, of the heating system by means of thermal heads and multi-way valves. After all, we can not interfere with the logic of the control unit set by the manufacturer. However, as a rule, most models of air conditioners have connections for external control devices - additional remotes or controllers. Through this interface, you can set the basic parameters of the air conditioner - on / off, the desired temperature, operating mode (cooling, heating, ventilation, dehumidification, ozonation, etc.) In addition, the controller has access to data on the current state of the air conditioner, such as temperature and humidity in the room, current settings, fault codes and more.
Thus, the air conditioner is easy to integrate into a comprehensive home climate control system. Technically, this is realized depending on the model of the air conditioner - some support direct connection to controllers using, for example, the RS-485 interface. In other cases, you can use specialized adapters.
Special mention should be made of control methods, such as emulation of a wireless control panel with an infrared communication channel. This solution is often offered as an inexpensive and versatile option. Especially if the air conditioner does not support any wired control interface.
It is worth noting certain disadvantages of this method. The main thing is the lack of feedback from the air conditioner about its condition. This leads to many inconveniences that can be extremely important in automation - the controller does not receive data on the condition of the air conditioner at this time, so it can not correctly change the temperature setting or even guaranteed to turn it on. It is no secret that in order for the control unit to receive a command from the remote control via infrared, it must be within range of the transmitter. Any obstruction (or even dust on the receiver or transmitter) that occurs during the transmission of the command makes it impossible for the air conditioner to receive this command. And since there is no feedback, the controller will not receive confirmation that the command is accepted and executed. Because of this, the meaning of automation is lost.
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