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

http://en.wikipedia.org/wiki/Air_conditioning

https://www.ptt.cc/man/Interior/DC61/M.1209442147.A.EDC.html

http://en.wikipedia.org/wiki/Refrigerator

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