Defrost timer is a fully automatic defrost refrigerator that controls the components of the defrost program. Refrigerator defrost timer working principle is that a micro synchronous motor (about 3W or so) is geared to drive a cam, and then the cam is adjusted. The time triggers a set of contacts to complete the control of the defrost program. The time for the cam to rotate is generally 8~12h.
The drive motor of the defrost timer is associated with the motor of the compressor and continues to operate as the compressor is turned on and off.
The working coefficient of the compressor is generally 40% to 50%. Therefore, the refrigerator can be defrosted once every day and night.
The run-time for you to choose and the defrost time can be made according to customers requirement.
In fact, the defrost timer technique was originally applied to the refrigerator compartment, it was later used for freezer compartment as well.
A lot of people like choosing the refrigerator with defrost timber. So people can save much time to remove frost from the refrigerator. What’s more, it also can save power and improve the work efficiency of the freezer.
To compare with common freezers, our MfgHVACR refrigerator defrosts timer’s advantage:
- No need to manually defrost the frost buildup, therefore power can be saved.
- Food packaging is easier to see
- Most frozen food will not stick together.
- Smells are limited, especially in total frost-free appliances because the air always circulates.
- Better temperature management.
Freezers with automatic defrost timber and combined refrigerator units which also apply self-defrosting to their freezer compartment are called “frost free”.
So defrost timer is an automatic cream. It does not need to be manually adjusted. Usually, when the compressor in the refrigerator accumulates to the rated working time value (about 8 hours), the defrosting timer will automatically change to the defrosting state and stop. Compressor operation, energization heating defrosting heating tube.
After the defrosting is completed, the defrosting timer will automatically turn to the cooling state, power off the heating tube, and energize the compressor.
Refrigerator defrost timer principle:
The frost-free refrigerator is not frost-free, but everyone can’t see it.
Each frost-free refrigerator has a mechanical or electronic defrosting system. When the compressor is working for a period of time (about 8-12 hours), the surface of the finned evaporator will also be frosted.
If it is not defrosted, the frost will become more and more Thick, when the finned evaporator is full and the air duct is blocked, so that the cold air can not be recycled and the cooling effect is reduced. In the middle of the finned evaporator, electric heating wire and bimetal temperature control and temperature fuse are installed. When the defrosting is heated by the electric heating wire to a certain temperature, the bimetal temperature control breaks the defrosting and the cooling is resumed.
The water formed by the defrosting flows from the tank through the water conduit to the water storage box at the bottom of the refrigerator and is automatically evaporated by heat.
As an important refrigerator accessory that helps people save defrosting time and power, defrost timber is used by most brand suppliers, like Samsung, LG, GE, and Whirlpool.
We also are developing more advanced defrost timer. For example, Some newer refrigerator models have a computer that monitors how many times each door is opened and uses this data to control defrost scheduling thereby reducing power use.
Save energy and time, let’s more happy and friendly to the earth.