What Is a Digital Thermostat?

Temperature controller refers to a series of automatic control elements that are physically deformed inside the switch according to the temperature change of the working environment, which produces certain special effects and generates on or off actions. It is also called temperature control switch and temperature protector. , Temperature controller, referred to as temperature controller. Or the temperature is transmitted to the temperature controller through the temperature protector, and the temperature controller sends a switch command to control the operation of the equipment to achieve the ideal temperature and energy saving effect.

thermostat

Temperature controller refers to a series of automatic control elements that are physically deformed inside the switch according to the temperature change of the working environment, which produces certain special effects and generates on or off actions. It is also called temperature control switch and temperature protector. , Temperature controller, referred to as temperature controller. Or the temperature is transmitted to the temperature controller through the temperature protector, and the temperature controller sends a switch command to control the operation of the equipment to achieve the ideal temperature and energy saving effect.

The application range of thermostats is very wide. According to different types of thermostats, they are used in many products such as home appliances, motors, refrigeration or heating.

Chinese name

thermostat

Foreign name

Thermostat

Principle

Its working principle is through

Take a closer look at the three feet on the thermostat. They are replaced by English letters and numbers, respectively: H (6), L (3), C (4).

H (6) is connected to the brown wire, which is the power supply

Control methods are generally divided into two types; one is controlled by the temperature change of the object to be cooled, and a vapor pressure temperature controller is mostly used; the other is controlled by the temperature difference of the object to be cooled, and the electronic temperature is mostly used Controller.

It uses fuzzy control technology such as PID control, P (Proportional) proportional + I (Integral) integral + D (Differential) differential control.

Bimetal

It is a physical phenomenon (volume change) that causes the material (generally a liquid) in the temperature-sensing part of the thermostat to undergo corresponding thermal expansion and contraction when the temperature of the controlled object changes. Or shrink. Based on the principle of lever, the on-off action of the switch is achieved to achieve the purpose of constant temperature. The liquid expansion thermostat has the performance characteristics of accurate temperature control, stable and reliable, small temperature difference between start and stop, large temperature control adjustment range and large overload current. Liquid expansion thermostat is mainly used in temperature control occasions such as home appliance industry, electric heating equipment and refrigeration industry.

The temperature controller converts the change of the controlled temperature into the change of space pressure or volume through the enclosed temperature-sensing temperature package and capillary tube. When the temperature set value is reached, the elastic element and the fast instantaneous mechanism are used, Automatically close the contacts to achieve the purpose of automatic temperature control. It consists of a temperature sensing part, a temperature setting main body part, a micro switch that performs opening and closing, or an automatic damper. The pressure type thermostat is suitable for occasions such as refrigeration appliances (such as refrigerators and freezers) and heaters.

Electronic temperature controller (resistive type) is measured by resistance temperature sensing method. Generally, platinum wire, copper wire, tungsten wire, and thermistor are used as temperature measuring resistors. These resistors have their own advantages. Most home air conditioners use thermistors. Electronic temperature controllers have the advantages of stability and small size, and are used in more and more fields.

Digital electronic temperature controller is an accurate temperature detection controller.

In most cases in Europe, the thermostat is a necessary accessory for the wall-hung boiler, and the two are delivered to the user at the same time. Most of the thermostats are intelligent thermostats. In China, nearly 95% of the wall-mounted boilers that have been installed and are being commissioned are not equipped with any form of simple or intelligent temperature controller. And the room heating system is equipped with a temperature controller, especially an intelligent temperature controller, which is an extremely prominent and most important link in the integrated energy-saving heating system.

Convenient: Automatically adjust the wall-hung boiler to switch on or off automatically every day, eliminating manual operation, which is most necessary for office workers' families;

Comfort: The room temperature will be adjusted automatically every morning, noon, night and night, avoiding the embarrassment of waiting for the room to heat up and freezing after getting up in the morning and coming home from work

Gas saving: change the extensive water temperature control to advanced and accurate room temperature control, plus set the room temperature to run on demand on a daily basis, without the need for open day and night gas heating;

Rest assured: When the room temperature is too low, the wall-hung boiler is forced to start, and only a small amount of gas is required to safely protect the room from freezing. ^[1]

Thermostats are widely used in various home appliances, such as refrigerators, water dispensers, water heaters, coffee makers, etc. The quality of the thermostat directly affects the safety, performance and life of the whole machine. It is a very critical component. Among the many technical indicators of the thermostat, life is one of the most important technical indicators for measuring the thermostat products. The appliance standards stipulate that the life of the thermostat is at least 10,000 times. Some appliances, such as refrigerators, control the motor-compressor thermostat, and some of the thermostats in liquid-filled radiators require a life of at least 100,000. The standard for household thermostats GB14536.10-2008 / IEC60730-2-9: 2004 makes detailed provisions on the life test of thermostats. ^[2]