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According to the principle of thermostat manufacturing, the thermostat is divided into:
1. Kicking thermostat:
The types of various snap-type thermostats are collectively referred to as KSD. Commonly used as KSD301, KSD302, etc., the thermostat is a new type of bimetal thermostat, mainly used as a heat protection for various electric heating products, usually with heat. The fuses are used in series, and the snap-type thermostat is used as the primary protection. The thermal fuse is used as a secondary protection when the sudden-type thermostat fails or fails to cause the electric heating element to overheat, thereby effectively preventing the burning of the electric heating element and the fire accident caused thereby.
Two-liquid rising thermostat:
When the temperature of the controlled object changes, the substance (generally liquid) in the temperature sensing portion of the temperature controller generates a corresponding physical phenomenon (volume change), and the bellows connected with the temperature sensing portion expands. Or shrink. With the principle of leverage, the switch is turned on and off, and the liquid expansion type thermostat with temperature control has the characteristics of accurate temperature control, stable and reliable, small temperature difference between start and stop, large temperature control adjustment range and large overload current. The liquid rise type thermostat is mainly used in temperature control occasions such as home appliance industry, electric heating equipment and refrigeration industry.
Third, the pressure thermostat,
The thermostat converts the change of the controlled temperature into a change of the space pressure or volume through the sealed temperature and capillary of the internal charge temperature working medium, and reaches the temperature set value through the elastic element and the fast momentary mechanism. The contacts are automatically closed to achieve automatic temperature control. It consists of a temperature sensing unit, a temperature setting body unit, a micro switch that performs opening and closing, or an automatic damper. Pressure thermostats are suitable for applications such as refrigeration appliances (such as refrigerator freezers) and heaters.
The above are common mechanical thermostats.
Fourth, electronic thermostat,
The electronic temperature controller (resistive type) is measured by the method of resistance temperature sensing. Generally, white gold wire, copper wire, tungsten wire and thermistor are used as temperature measuring resistors, and these resistors have their own advantages. Most household air conditioners use thermistor type. The electronic temperature controller has the advantages of stability and small volume and is now used in more and more fields.
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