 Air conditioning Category: 1. Refrigeration cycle 2. Heat pump 3. Evaporative cooling  Refrigerants  Air conditioning system configurations  Refrigeration system configurations

A simple stylized diagram of the refrigeration cycle: (1) condensing coil, (2) expansion valve, (3) evaporator coil, (4) compressor

 A heat pump is an air conditioner in which the refrigeration cycle can be reversed.  In heating mode, the indoor evaporator coil becomes the condenser coil and producing heat.  The outdoor condenser unit also switch to the evaporator, and discharges cold air.

 Some of the sensible heat of the entering air is converted to latent heat by the evaporation of water in the wet cooler pads.

 These coolers cost less and are mechanically simple to understand and maintain.

 Be noncorrosive to mechanical components, and be safe, including free from toxicity and flammability. It would not cause ozone depletion or climate change.  High heat of vaporization, a moderate density in liquid form, a relatively high density in gaseous form, and a high critical temperature.

 The interior air is cooled as a fan blows it over the evaporator.  On the exterior the heat drawn from the interior is dissipated into the environment as a second fan blows outside air over the condenser.

 Split-system air conditioners come in two forms: mini-split and central systems. In both types, the inside-environment (evaporative) heat exchanger is separated by some distance from the outside-environment (condensing unit) heat exchanger.

 Modern scientific and technological progress, Each household electrical appliances have lost their advantages and disadvantages, We should choose the type that best meet usage requirements

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