A frequency conversion control method for a frequency conversion refrigerator with an automatic frosting system

Abstract

The invention relates to a variable frequency control method for an inverter refrigerator comprising an automatic defrosting system. According to the method, the traditional variable frequency control method is used for variable frequency control when a compressor of the refrigerator starts; but when the automatic defrosting system starts, a main control panel acquires and records the running frequency of the compressor before the automatic defrosting system works and heating time required by defrosting; after the automatic defrosting system stops working, an adjustment frequency value is calculated by a calculation unit of the main control panel and is transmitted to a variable frequency control chip of the compressor; the variable frequency control chip of the compressor selects a corresponding adjustment frequency to control the running of the compressor according to the current refrigeration period in a refrigeration period sum requiring frequency adjustment. By the method, the running frequency of the compressor can be adaptively adjusted, so that the refrigerating capacity of the refrigerator can be improved, and defects of control methods of using temperature factors such as environmental temperature and user set temperature are overcome.

Description

technical field [0001] The invention relates to a frequency conversion control method of a frequency conversion refrigerator, in particular to a frequency conversion control method of a frequency conversion refrigerator with an automatic frosting system. Background technique [0002] The main task of refrigerator control is to maintain the optimum temperature of the food in the box to achieve the purpose of food preservation. Existing refrigerators often use a temperature control system to control the operation of the refrigeration system of the refrigerator through temperature. For example, the computer chip regularly collects the temperature of a certain compartment of the refrigerator (referring to the independent space of refrigeration and freezing). If the deviation of this temperature from the target (usually given by the user through the operation panel) reaches a certain value (given by the design engineer), when the refrigeration system stops cooling, this deviatio...

AI Technical Summary

Problems solved by technology

[0004] However, when the refrigerator is in normal operation, the heat load inside the box sometimes changes suddenly, such as the dynamic heat load generated by the automatic defrosting system

If the refrigerator has been running for a long time, frost will form in some places, and the accumulated frost layer will affect the use and increase power consumption. The frost-free refrigerator with intelligent defrosting function solves this problem; the frost-free refrigerator is first collected by the computer chip. Information such as temperature and compressor running time, and then send instructions to the automatic frosting system, turn on the defrosting heater for defrosting, and the automatic frosting system will stop working when the stop condition is met

[0005] However, although the automatic frosting system solves the problem of frosting, it also causes the temperature rise of the compartment to deviate from the target value, which easily leads to the deterioration of the stored food, which is not good for food storage, so it needs to be quickly restored.

When dealing with such sudden heat load changes, the above-mentioned control method using temperature factors such as ambient temperature and user-set temperature cannot adapt to the sudden change of load more quickly, and cannot achieve the purpose of faster cooling and energy saving. Not only is the cost high and the efficiency is low, but also consumes a lot of power and takes a long time