Frequency converting control method for refrigerator

Abstract

The invention provides a frequency converting control method for a refrigerator. The method includes that (1) whether the refrigerator meets a refrigeration condition or not is determined after defrosting of the refrigerator is finished; (2) if the refrigerator meets the refrigeration condition, an environment temperature and a setting temperature are detected, and a preset revolution meter is inquired so as to control the operation of a compressor at a corresponding maximum revolution speed until the refrigeration is completed; (3) when the refrigerator meets the refrigeration condition again, the operation of the compressor is controlled at a corresponding minimum revolution speed; (4) whether the compartment temperature of the refrigerator decreases to a preset temperature or not after preset time is determined; (5) if the compartment temperature of the refrigerator does not decrease to the preset temperature, the revolving speed of the compressor is increased by one level, and the step (4) is returned; and (6) if the compartment temperature of the refrigerator decreases to the preset temperature, the compressor is controlled to continue operating until the refrigeration is finished. According to the frequency converting control method for the refrigerator, the revolving speed of the compressor is continuously adjusted according to the environment temperature, interior temperatures of compartments and the like, so that the frequency conversion is achieved, the cooling speed of the refrigerator is improved, waste of cooling capacity of the compressor is reduced, and the energy consumption is lowered.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to a frequency conversion control method for a refrigerator. Background technique [0002] In the current frequency conversion control field of refrigerators, the frequency conversion control of refrigerator compressors mainly adopts the following three control methods: (1) Control the speed of refrigerator compressors according to the ambient temperature. Generally, each refrigerator is equipped with an ambient temperature sensor. When the ambient temperature is high, the rotation speed is high. When the ambient temperature is low, the speed is low. (2) Control the speed of the compressor according to the difference between the set temperature and the temperature of the refrigerator compartment sensor. The larger the temperature difference, the higher the speed, and the smaller the temperature difference, the lower the speed. (3) Adjust the speed of the compresso...

AI Technical Summary

Problems solved by technology

There are three shortcomings in the existing technical solutions: (1) These three compressor speed control methods are relatively simple, and the compressor speed cannot be adjusted according to the actual use needs, and the effect of "frequency conversion" of the frequency conversion compressor is not really reflected

(2) The rotational speeds of these three control rules are relatively fixed, and the frequency conversion of the frequency conversion compressor cannot be well controlled. As a result, when the temperature difference between the set temperature and the actual temperature of the refrigerator is large, the rotational speed of the compressor is low and the cooling speed of the food is slow; When the temperature difference between the fixed temperature and the actual temperature of the refrigerator is small, the compressor speed is high and the actual power consumption of the refrigerator is large.

Therefore, the effect of energy saving and consumption reduction and rapid cooling achieved by the inverter compressor through frequency conversion cannot be exerted.

(3) The opening and closing of the door can only indirectly reflect the impact of the opening and closing of the refrigerator door on the cooling demand, and cannot accurately reflect the actual temperature change of the refrigerator

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