Thermostat

The basic principle of the mechanical temperature controller is that the sealed temperature sensing tube with a certain medium is connected to a corrugated box. The pressure of the medium in the temperature sensing tube changes due to the change of the ambient temperature, which drives the corrugated box to extend or shorten, thus pushing the microswitch to make the compressor power on or off. By adjusting the position between the corrugated box and the microswitch, the pressure of the trigger switch can be changed, that is, the controlled temperature can be changed.

The refrigerator refrigerator thermostat is mainly composed of three parts. One is its electrical part, including the switch. The other part is the capsule. The third part is the temperature adjustment part. Its principle is that when the surrounding temperature becomes low, the lever on the top capsule will immediately retract. However, if the temperature rises, its gas will immediately expand, Then the contact of the thermostat will close and the refrigerator will start to work.

The action of the bellows acts on the spring. The initial spring force is controlled by the knob on the control panel

When the temperature rises to the set temperature, the temperature-sensitive agent gas in the capillary tube and bellows expands to make the bellows extend and overcome the spring force to connect the switch contacts. At this time, the compressor operates and the system cools

When the temperature drops to the set temperature again, the temperature sensing bag gas shrinks, the bellows shrinks and acts together with the spring, and the switch is placed in the off position to cut off the motor circuit of the compressor.

In this way, the temperature of the refrigeration equipment can be controlled repeatedly.

The general refrigerator thermostat is installed on the top of the top of the refrigerator. If your refrigerator is a computer board, the refrigerator thermostat is on the refrigerator panel. If it is a mechanical board, the refrigerator thermostat is in the refrigerator.

The temperature control button of the refrigerator generally has five gears: 0, 1, 2, 3, 4 and 5, or 0, 1, 2, 3, 4, 5, 6 and 7. The 0 gear is the shutdown gear, and the 5, 6 and 7 gears are the forced cold gear. When the temperature controller is adjusted to the forced cold gear, the compressor will continue to work, and the refrigerator will always be in the non-stop state.

The higher the number of the thermostat, the lower the temperature of the freezer. Generally, in spring and autumn, the thermostat is adjusted to the third gear. At the same time, it depends on the user's personal settings to see whether the freezer can reach below 18 degrees. In order to better achieve the power saving effect of the food fresh-keeping box in summer, users can adjust the number of temperature ranges to 1 or 3, and adjust it to 4 or 5 in winter.