1, the principle of refrigeration
Liquid vaporization refrigeration is the use of liquid vaporization of heat absorption, exothermic effect of condensation to achieve refrigeration. Liquid vaporization to form steam. When the liquid (refrigerant) in a closed container, the container in addition to the liquid and the liquid itself produced by the steam, there is no other gas, liquid and steam will be at a certain pressure to reach equilibrium.
The gas is called saturated vapor, the pressure is called saturation pressure, and the temperature is called saturation temperature. Equilibrium when the liquid is no longer vaporized, then if a portion of the steam from the container, the liquid must continue to vaporize a portion of the steam to maintain this equilibrium. Liquid vaporization to absorb heat, this heat is called latent heat of vaporization.
The latent heat of vaporization comes from the cooled object, making the cooled object cooler. In order to make this process continuous, it is necessary to continuously pump the vapor from the container and make it condense into a liquid and then return to the container. The vapor drawn from the container such as direct condensation into a liquid, the temperature of the required cooling medium is lower than the evaporation temperature of the liquid, we hope that the condensation of the vapor is carried out at room temperature, and therefore need to raise the pressure of the vapor to the saturation pressure at room temperature.
The refrigeration medium will evaporate at low temperature and pressure, producing a cold effect; and condense at room temperature and high pressure, releasing heat to the surrounding environment or cooling medium. Vapor at room temperature, high pressure condensation into a high-pressure liquid, but also need to reduce its pressure to the evaporation pressure before entering the container.
Liquid vaporization refrigeration cycle is composed of four processes: vaporization of the work material, steam pressure, high-pressure vapor condensation, high-pressure liquid pressure reduction.
2, the principle of heating
Compressor inhalation of low-pressure gas through the compressor compression into high-temperature and high-pressure gas, high-temperature gas through the heat exchanger to raise the temperature of the water, while the high-temperature gas will be condensed into liquid.
Liquid into the evaporator for evaporation, (evaporator evaporation at the same time there should be heat transfer media, according to the heat transfer of different media machine model structure is different, commonly used air-cooled and ground source.) After the liquid through the evaporator into a low-pressure low-temperature gas, low-temperature gas is again inhaled by the compressor for compression.
In this way the cycle continues, the air conditioning side of the circulating water becomes hot water of about 45-55 degrees. Hot water through the pipeline to the room to be heated, the room is installed with a fan coil heat exchange of hot water and air to achieve the purpose of heating.
Expanded Information:
Notes on the use of air-conditioning:
Notes<
1, if you feel that the indoor temperature is too high, you can lower the set temperature appropriately.
2, the shell of the indoor unit should be frequently cleaned and treated, generally available clean dry cloth wipe clean or wipe with neutral detergent, never allowed to use water to rinse directly, if the use of cloth wipe should also be carried out after the power failure.
3, the indoor temperature should not be adjusted too low, otherwise the human body is not good, should be properly adjusted to set the temperature.
4, the indoor unit should not be obstacles in front of the wind, otherwise affect the air;
5, the effective use of the timer, you can achieve both energy saving and comfortable effect.
6, air-conditioned rooms should not be too many people, too crowded, otherwise the cold appears to be insufficient, the temperature is difficult to drop;
7, the room doors and windows should not be frequently opened and closed, people should not be frequently in and out, so as to avoid loss of cold air;
8, the glass window must be closed tightly, closely, and the interior should be hung with a double layer of white curtains in order to reflect a part of the incoming light and heat;
9, the room can be opened briefly during the change of air;
9, the room can be opened briefly during the change of air. Indoor air exchange can be briefly open the window, open the window time is generally not more than 10 minutes;
10, the air filter should be regularly cleaned, otherwise the airflow is blocked, resulting in insufficient air volume, room temperature rise;
11 , the temperature should be adjusted during sleep, air conditioner can be automatically adjusted to the sleep temperature;
12, the outdoor unit should be installed securely, to reduce the vibration and noise, the condenser suction and discharge. Condenser suction and discharge port to leave enough space in front of the ventilation, if the wind is blocked, condensing pressure rise will lead to shutdown;
14, air conditioner just running for rapid cooling can be adjusted to high-speed selector switch to high-speed gear, to be adjusted to medium-speed and low-speed gear when the temperature drops;
15, the window air conditioner ventilation ventilation can be used to ventilate the switch, but the time of the ventilation is not more than 15 minutes;
16, air conditioner outdoor radiator too much ash will make the efficiency decline, should be regularly checked and clean the outdoor radiator (in the power outage, can be blown by compressed air);
17, split-type air conditioner outdoor unit can not be inserted with a stick object, otherwise the fan will be stuck or damaged;
18, when you feel that air conditioning is not ideal for use should be consulted
18, when feel the use of the air conditioner is not ideal, should consult the instruction manual, analyze whether it is caused by improper use, identify the reasons for corrective action;
19, found that the failure can not be dealt with on their own, you can find the original installation of the department's professional maintenance technicians to solve the problem, or contact with the brand company's local service personnel, can not repair or find non-professionals to overhaul;
20, air conditioner should be unplugged in a timely manner when it is not in use;
21, the air conditioner must be stopped after three minutes to start again to protect the compressor;
22, with a remote control (should not be placed in the child easy to take place) of the air conditioner in the use of the child as a toy operation, so as not to damage the machine.
Wikipedia - Air Conditioning