How does the thermostat work and structure?
The thermostat is an electrical switch that controls the temperature of the air conditioning room:
The temperature range of the air-conditioned room controlled by the thermostat is generally at 18 ° C to 28 ° C. Window air conditioner commonly used thermostat is the principle of pressure to promote the contact through the broken. Its structure consists of bellows, temperature package (test tube), eccentric wheel, micro switch and other components of a sealed induction system and a signal transmission system.
Thermostat control method is generally divided into two kinds: one is controlled by the temperature of the object to be controlled, the use of vapor pressure thermostat, and the other by the cooling of the object to change the temperature to control, Electronic thermostat.
The thermostat can be divided into:
1. Mechanical thermostat is divided into: steam pressure thermostat, liquid expansion thermostat, gas adsorption thermostat, metal expansion thermostat.
One vapor pressure thermostat is divided into: inflatable, liquid and gas mixed type and filling type. Home air conditioning mechanical thermostat are based on such temperature controller.
2. Electronic thermostat is divided into: resistance thermostat and thermocouple thermostat.
How does the thermostat work:
1. Vapor pressure type thermostat
Temperature controller The operation of the bellows acts on the spring. The spring force is controlled by the knob on the control panel. The capillary is placed in the air inlet of the room in the air conditioner and reacts to the temperature of the indoor circulation return air. When the room temperature rose to the set temperature, the capillary and bellows in the temperature of the temperature expansion of the gas, so that the bellows elongation and overcome the spring of the spring to connect the switch contacts, then the compressor operation, the system cooling, And then dropped to the set temperature, the temperature package gas shrink, the bellows shrink together with the spring action, the switch placed in the open position, so that the compressor motor circuit cut off. As a result of repeated action, so as to achieve the purpose of controlling the room temperature.
2. Electronic thermostat
Electronic temperature controller (resistive) is measured by the method of resistance temperature, the general use of white gold wire, copper wire, tungsten wire and semiconductor (thermistor, etc.) for the temperature resistance, these resistors have their own point. Household air conditioning temperature controller sensors are mostly thermistor type.
Refrigerator thermostat principle:
The refrigerator temperature controller is mainly composed of a feedback circuit and a comparator. When set the temperature inside the box, will use a thermistor to measure the temperature inside the box, when higher than the set temperature, will increase the power to strengthen the cooling, and vice versa; this has been the role will make it to set the temperature The
Thermostat control method is generally divided into two kinds: one is controlled by the temperature of the object to be controlled, the use of vapor pressure thermostat, and the other by the cooling of the object to change the temperature to control, Electronic thermostat.
The thermostat can be divided into:
1. Mechanical thermostat is divided into: steam pressure thermostat, liquid expansion thermostat, gas adsorption thermostat, metal expansion thermostat.
One vapor pressure thermostat is divided into: inflatable, liquid and gas mixed type and filling type. Home air conditioning mechanical thermostat are based on such temperature controller.
How does the thermostat work:
1. Vapor pressure type thermostat
Temperature controller The operation of the bellows acts on the spring. The spring force is controlled by the knob on the control panel. The capillary is placed in the air inlet of the room in the air conditioner and reacts to the temperature of the indoor circulation return air. When the room temperature rose to the set temperature, the capillary and bellows in the temperature of the temperature expansion of the gas, so that the bellows elongation and overcome the spring of the spring to connect the switch contacts, then the compressor operation, the system cooling, And then dropped to the set temperature, the temperature package gas shrink, the bellows shrink together with the spring action, the switch placed in the open position, so that the compressor motor circuit cut off. As a result of repeated action, so as to achieve the purpose of controlling the room temperature.
2. Electronic thermostat
Electronic temperature controller (resistive) is measured by the method of resistance temperature, the general use of white gold wire, copper wire, tungsten wire and semiconductor (thermistor, etc.) for the temperature resistance, these resistors have their own point. Household air conditioning temperature controller sensors are mostly thermistor type.
Refrigerator thermostat principle:
The refrigerator temperature controller is mainly composed of a feedback circuit and a comparator. When set the temperature inside the box, will use a thermistor to measure the temperature inside the box, when higher than the set temperature, will increase the power to strengthen the cooling, and vice versa; this has been the role will make it to set the temperature The
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