Comfort Cooling, Air Conditioning
Comfort cooling air conditioners have two standard controls:
- Thermostat for temperature control.
- Defrost control for de-icing of the evaporator.
Tyres thermostat sensor element, as a rule, in the return air duct of the air conditioner. The supply air is cooled enough, the unit will stop the device.
In two stages (two buttons) engine control thermostat shown in Fig. 8-46. The sensor element responds to the return air temperature. The temperature increase will first cause the fan switch cut. Further increase in temperature will cause the compressor switch cut. When the room temperature falls, this operation will be canceled (fan recent disable). Fig. 8-47 shows a diagram that helps explain the principle of operation of this control.
Control knob adjusts to specify the range of the air conditioner. If the room is too cold, the air conditioning on the execution time can be reduced.
Defrost control, Figure 8-48, prevent ice formation on the evaporator. This control opens a circuit when the evaporator temperatures close to freezing.
He has factory settings and does not require adjustment on the job.
This control Fig. 8-49, is one pole, single throw (SPST) control if used for defrost only. This provides defrost, keeping compressor off enough time after the sensor shows ice formation temperature. When defrosting heaters are used outside the loop, this is one-pole, double-throw (SPDT) management.
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Industrial