Cooling system and control method therefor

A cooling system, comprising a compressor unit, a condenser, a first solenoid valve, a second solenoid valve, a first throttle valve, and a frequency converter, wherein the second solenoid valve and the first throttle valve are connected in series and connected with the first solenoid valve in parallel;

• the compressor unit, the condenser, the first solenoid valve, and the frequency converter are connected in series to form a first cooling loop;
• the compressor unit, the condenser, the second solenoid valve, the first throttle valve, and the frequency converter are connected in series to form a second cooling loop;
• and the frequency converter is internally provided with a temperature detector and a heat exchange module;
• wherein if the temperature detector detects that a temperature in the frequency converter is lower than a switching temperature T, the first solenoid valve is opened, the second solenoid valve is closed, the first cooling loop is opened, and the second cooling loop is closed;
• and
• if the temperature detector detects that the temperature in the frequency converter is equal to or higher than the switching temperature T, the first solenoid valve is closed, the second solenoid valve is opened, the first cooling loop is closed, and the second cooling loop is opened.