Refrigeration control method and system and air-conditioner

Abstract

The invention provides a refrigeration control method used for an air-conditioner. The method includes the steps that the outdoor environment temperature is detected; the opening degree of a plurality of preinstalled expansion valves corresponding to a plurality of outdoor environment temperature ranges one by one is set; the opening degree of the expansion valves of the air-conditioner is adjusted according to the outdoor environment temperature and the outdoor environment temperature ranges. Correspondingly, the invention further provides a refrigeration control system and the air-conditioner. According to the technical scheme, the opening degree of the expansion valves can be increased in time when the outdoor environment temperature is excessively low, so that the pressure of a condenser is improved, and the refrigerating capacity of the air-conditioner can be prevented from being lowered substantially.

Description

technical field [0001] The present invention relates to the technical field of air conditioning, in particular to a refrigeration control method, a refrigeration control system and an air conditioner. Background technique [0002] At present, the indoor temperature standard for general air-conditioning refrigeration is 27°C, and the outdoor temperature standard is 35°C. When the outdoor temperature ranges from 0 to 50°C, the range for indoor air-conditioning refrigeration is 17 to 32°C. When the outdoor use range is 20 to 50°C, the higher the temperature is, the higher the condenser pressure will be, and the exhaust temperature will also increase accordingly. At this time, if the opening of the expansion valve is increased, the flow rate of the system can be increased. In order to enhance the cooling effect, therefore, several intervals can be divided according to the exhaust temperature, and the expansion valve opening can be adjusted to the preset value corresponding to th...

AI Technical Summary

Problems solved by technology

When the outdoor ambient temperature is in the range of -15°C to 0°C, the heat generated by the indoor human body, lighting fixtures, electrical equipment and gas appliances will increase the indoor temperature, and the modern architectural design materials have good heat insulation effect and small heat leakage. In some cases, even if the outdoor temperature is very low, the room still needs to be refrigerated to keep the temperature constant. For example, in gymnasiums, conference rooms, dance halls, passenger stations, kitchens, etc., where there are many people and a lot of exercise, or they are relatively closed and have high heat dissipation requirements. , will generate a lot of heat, and if the ventilation equipment such as doors and windows is opened, the indoor temperature will fluctuate greatly.

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