Patent ID: 8793003
Filing Date: 2014-07-29
Classification: F25B,G05B,Y02B

Abstract:
1. A vapor compression system for using a vapor compression cycle to move refrigerant through components of the vapor compression system comprising: an evaporator having a fan for adjusting an air-flow rate through a heat exchanger, wherein the fan is variable speed fan controlled by an evaporator fan control device; a condenser having a fan for adjusting the air-flow rate through the heat exchanger, wherein the fan is variable speed fan controlled by a condenser fan control device, a compressor having a speed for compressing and pumping refrigerant through the system, wherein the speed of the compressor is variable and controlled by a compressor control device, and an expansion valve for providing an adjustable pressure drop between a high-pressure portion and a low-pressure portion of the vapor compression system, wherein the expansion valve is controlled by an expansion valve control device, the vapor compression system further comprising: a control system; a user input interface for receiving a setpoint specifying a desired indoor temperature; a non-transitory memory for storing a lookup table including sets of control inputs, each set in the sets of control inputs is associated with a key and is predetermined to control a frequency of a motor of the compressor, a position of the expansion valve, a frequency of revolutions of the evaporator fan, and a frequency of revolutions of the condenser fan; at least one sensor arranged for sensing an environmental parameter including a current value of an outdoor temperature, and a current value of an indoor temperature; and a control device; wherein, the control system comprises: a command module operatively connected to the control device for generating commands to control the components of the vapor compression system using the set of control inputs.