The temperature controller is an electric switching device that controls the temperature of the air conditioner. The temperature range in the air conditioner controlled by the temperature controller is generally at 18 ° C – 28 ° C. Window Air Conditioning Temperature Controller is the pass and break of contacts with pressure action principles. Its structure consists of a bellows, a sensing temperature package (test tube), an eccentric wheel, a micro switch, and the like, a system of a sealing induction system and a transfer signal power.
The control method is generally divided into two; one is controlled by the temperature variation of the cooling object, more vapor pressure www.china-natural.com
Enclosure Fan and Filter type temperature controller, and the other is controlled by the temperature difference change of the cooling object, more electronic temperature Controller. The thermostat is divided into:
Temperature controller mechanical division: vapor pressure thermostat, liquid expansion thermostat, gas adsorption thermostat, metal expansion thermostat.
Among them, the vapor pressure thermostat is divided into: inflatable, liquid mixed and filling. Household air conditioning mechanics are dominated by such thermostats.
Temperature controller electronically divided into: resistive thermostat and thermocouple thermostat.
The role of the circuit system:
The role of the air conditioner circuitry is to control the normal operation of air conditioning and multi-function, protect the compressor and fan motor. Component components of the circuitry mainly include: temperature controller, heat protector, master switch, operating capacitor, fan motor operating capacitor, and the like are fixed in the control box. The left picture is an electrical circuit diagram of a single-cooling air conditioner. The function of the temperature controller is just to control the start and stop of the compressor.
Temperature controller working principle
Vapor pressure
The action of the bellows acts on the spring, the spring of the spring is controlled by the knob on the control panel, and the capillary is placed at the chamber inhaled air in the air conditioner, and the temperature of the indoor cycle is reacted. When the room temperature rises to the modulated temperature, the thermostat gas in the capillary and the bellows expands, so that the bellows are elongated and overcome the spring stretch to turn the switch contact, at this time, the compressor is operated, the system is refrigerated until room temperature When it is reduced to the set temperature, the temperature of the temperature is contracted, the bellows shrinkage is operated with the spring, and the switch is turned off to cut the motor circuit of the compressor. This is repeatedly operated to achieve the purpose of controlling the temperature of the room.
Electronic temperature controller
Electronic temperature controller (resistance) is measured by a method of resistance temperature temperature, generally using white gold wire, copper wire, tungsten wire, and semiconductor (thermistor, etc.) as a temperature resistance resistance, which has its own excellent point. Most of the sensors of household air conditioners are in thermistor resistance.
The thermistor temperature controller is made according to the principle of Wheeth Bridge, and (left) is a Horsesden Bridge. At both ends of the BD, the power supply E is connected. According to the law of Kirhof, when the resistance R1 × R4 = R2 × R1 × R4 = R2 × R3 of the bridge, the potential of the two points, and there is no current between the outputs A and C. The size of the impedance R1 of the thermistor changes with the rise or decrease of the ambient temperature, so that the balance is damaged, and there is an output current between the ACs. Therefore, when constituting the thermostat, the temperature adjustment range and operating temperature can be easily changed by selecting the appropriate thermistor.
Metal expansion thermostat:
Based on the thermal shrinkage of the object. The heat rises is the commonality of the object, but different objects have no heat shrinkage. Two sides of the double gold tablets are conductors of different substances. At the temperature of the change, the double gold tablets are bent, and the set contacts or switches are hit, and the set circuit (protection) will begin.