Redistributing refrigerant between an evaporator and a condenser of a vapor compression system

A method of operating a vapor compression system, comprising:

• determining a liquid refrigerant level set point of a condenser of the vapor compression system based on parameters of the vapor compression system, wherein the parameters comprise a current liquid refrigerant level in the condenser;
• providing a first control signal to increase an opening of an expansion device of the vapor compression system in response determining that the current liquid refrigerant level in the condenser is greater than the determined liquid refrigerant level set point of the condenser;
• and
• providing a second control signal to decrease the opening of the expansion device in response to determining that the current liquid refrigerant level in the condenser is less than the determined liquid refrigerant level set point of the condenser.

A heating, ventilation, and air conditioning (HVAC) system, comprising:

• a condenser, an evaporator, and a compressor fluidly coupled together to form a vapor compression system of the HVAC system;
• an expansion device disposed between the condenser and the evaporator in the vapor compression system;
• a control panel communicatively coupled to the expansion device, wherein the control panel is configured to:
• determine a liquid refrigerant level set point of the evaporator based on parameters of the vapor compression system, wherein the parameters comprise a current liquid refrigerant level in the evaporator;
• provide a first control signal to increase an opening of the expansion device in response determining that the current liquid refrigerant level in the evaporator is lower than the determined liquid refrigerant level set point of the evaporator;
• and
• provide a second control signal to decrease the opening of the expansion device in response to determining that the current liquid refrigerant level in the evaporator is more than the determined liquid refrigerant level set point of the evaporator.