The working principle of thermostat, the magical working principle must be understood.

Now thermostats are widely used, such as refrigerators, air conditioners and boilers. Temperature controllers commonly used in daily life are mainly divided into mechanical and electronic. Traditionally, mechanical controllers are often used, but they are easily damaged and inaccurate. With the rapid development of science and technology, electronic control circuit has been more and more widely used in daily life, because it is more convenient and quite accurate, which has a far-reaching impact on people's lives. But do you all know how the thermostat works? Want to see what kind of working principle makes it so magical? Let's take a look together.

Working principle of temperature controller

Thermostat, according to the temperature change of working environment, physically deforms inside the switch, thus producing some special effects, producing a series of automatic control elements with on or off actions, or providing temperature data for the circuit according to the different working principles of electronic components at different temperatures, thus collecting temperature data for the power supply circuit. Thermostat is to operate the temperature of the controlled object to the required temperature, and this process is temperature control.

Working principle of temperature controller

The temperature controller can be divided into:

1. Mechanical thermostats are divided into: steam pressure thermostat, liquid expansion thermostat, gas adsorption thermostat and metal expansion thermostat.

Among them, the steam pressure thermostat is divided into: inflatable, liquid-gas mixed and liquid-filled type. The mechanical thermostat of household air conditioner is mainly based on this thermostat.

2. Electronic thermostats are divided into resistance thermostats and thermocouple thermostats.

Working principle of temperature controller:

1. Steam pressure temperature controller

The action of the bellows of the thermostat acts on the spring, and the elasticity of the spring is controlled by the knob on the control panel. The capillary tube is placed at the air inlet of the air conditioner to respond to the temperature of indoor circulating return air. When the room temperature rises to the set temperature, the temperature-sensitive agent gas in the capillary and bellows expands, which makes the bellows elongate and overcomes the elastic force of the spring to make the switch contact connected. At this point, the compressor runs and the system cools. Until the room temperature drops to the set temperature again, the temperature sensor gas contracts, and the bellows contracts with the spring to make the switch in the off position, thus cutting off the motor circuit of the compressor. Repeat this action, thus achieving the purpose of controlling the room temperature.

2. Electronic temperature controller

Electronic temperature controller (resistance type) is measured by resistance temperature sensing. Generally, there are platinum wire, copper wire, tungsten wire and semiconductor (thermistor, etc. ) as a temperature measuring resistor, these resistors have their own advantages and disadvantages. Most of the sensors of the temperature controller of household air conditioner are thermistor type.

Principle of refrigerator thermostat:

The refrigerator temperature controller is mainly composed of feedback circuit and comparator. After the temperature in the cabinet is set, the temperature in the cabinet will be measured by thermistor. When the temperature is higher than the set temperature, the power will be increased and the refrigeration will be strengthened, otherwise it will be reduced. If you continue to work like this, you will reach the set temperature.

Electric heating thermostat

Floor heating thermostat can be divided into electric floor heating thermostat and liquid circulation system thermostat. With the improvement of people's quality of life, the traditional heating mode is changed in winter, and the heating equipment is installed in the floor, and the heat radiates from the ground, which makes people feel comfortable. The floor heating thermostat is a terminal control product developed for controlling this heating equipment. It can set on-off or room temperature in different periods according to people's needs, thus realizing intelligent heating.

According to the different input and output forms, the floor heating thermostat can be divided into digital thermostat and analog thermostat. Generally, a digital thermostat has an LCD display panel or a digital tube display panel, and the temperature is set and controlled by pressing keys. Generally speaking, the analog thermostat uses the knob or slider impeller of the floor heating thermostat to set and control the temperature.

According to the different temperature sensing objects, it can be divided into:

1, mechanical thermostat

2. Electronic temperature controller

3. LCD thermostat

4. Room temperature controller

5. Ground temperature controller

6, double temperature controller

7, wireless control floor heating thermostat

8. Remote (centralized) control thermostat

About the knowledge of temperature controller, after reading the introduction of the above small series, do you know a little more? I hope I can help you.

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