Refrigerator and control method for refrigerating system of refrigerator

Abstract

The invention discloses a refrigerator and a control method for a refrigerating system of the refrigerator for achieving both-way controllability of the refrigerating amount and the refrigerating temperature so as to control the temperature of a freezing chamber and a cold storage chamber to fluctuate within the small range. The method comprises the steps that the temperature of the freezing chamber and the temperature of the cold storage chamber are obtained; and if it is determined that the temperature of the cold storage chamber meets the accurate temperature control condition of the cold storage chamber, after the temperature of the freezing chamber meets the accurate temperature control condition of the freezing chamber, the rotation speed of a compressor is controlled till the temperature of the freezing chamber reaches the first preset temperature, and then the aperture of an electronic expansion valve is controlled till the temperature of the cold storage chamber reaches the second preset temperature.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a refrigerator and a control method for a refrigeration system thereof. Background technique [0002] At present, the refrigeration system of a refrigerator can be divided into a single-cycle system, a double-cycle system, and a three-cycle system. Ordinary refrigerators generally use a single-cycle system. [0003] Such as figure 1 Shown is a schematic diagram of the structure of the single cycle system. In the single cycle system, the refrigerant only follows one cycle route. It first passes through one compartment and then another compartment. It cannot choose to enter the compressor through one of the compartments and then proceed cycle. In the single circulation system, the capillary is fixed, and the temperature of the compartment is controlled within the range of plus or minus 2°C of the set temperature. [0004] Such as figure 2 Shown is a schematic diagram of...

AI Technical Summary

Problems solved by technology

[0006] At present, the refrigeration system uses a fixed capillary tube for throttling and pressure reduction, so that the higher the rotation speed, the lower the evaporation temperature, or the lower the rotation speed, the higher the evaporation temperature, and it is impossible to achieve two-way controllability of cooling capacity and cooling temperature

The temperature control of the refrigerator compartment is to start cooling at 2°C above the set temperature, and stop cooling when it is 2°C below the set temperature, and when cooling, the temperature of the cold air is twenty degrees below zero or even twenty degrees, especially for the refrigerator For the food that needs to be kept fresh at the tuyere, it will be frozen for a while, and then thawed for a while, so it is not fresh at all.

Images