the preferred embodiments of the present invention and their advantages are best understood by referring to fig1 through 10 of the drawings provided below . fig1 is a block diagram of an exemplary cloud - based , distributed control for refrigerated appliances 1 according to this disclosure . in this diagram , one or more refrigerated appliances 10 are connected to a computing cloud 20 . one innovative aspect of this disclosure is the ability to deploy software in the computing cloud to control the temperature and other functions of a refrigerated appliance . the control software executing in cpu 30 acquires sensor data from the refrigerated appliance 10 as needed , performs the compare and compute functions of a transfer function of a typical closed - loop feedback control , and sends to the refrigerated appliance control signals that are received and interpreted by the communication and control unit in the appliance and its actuators . one advantage of the disclosed approach is that the complexity of the transfer function in the control method used is not limited by the resources available inside the appliance , and that it can be composed of any number of steps , each of high computational complexity and requiring the resources typical of a cloud computing environment . in some embodiments of this disclosure , one software task executed in the computing cloud &# 39 ; s cpu 30 , with its own private execution and data context , is instantiated in the computing cloud for each controlled refrigerated appliance 16 to perform tile transfer function of that refrigerated appliance . the computing cloud 20 is accessible from remote locations and includes at least one processing unit 30 and at least one data storage unit 40 . the computing cloud 20 is capable of both storing information in data storage 40 and performing data functions of information in cpu 30 , as well as to interact with external services . the refrigerated appliance 10 communicates with the computing cloud 20 using any secured or unsecured protocol , such as the transport layer security ( tls ) or any other socket - based communication protocol . the communication between the refrigerated appliance 10 and the computing cloud 20 is “ bidirectional ”, that is data is sent and received by both ends . the computing cloud 20 includes hardware that does not fit and is cost - prohibitive to incorporate in individual refrigerated appliance 10 . moreover , the computing cloud 20 includes software that would not run or would be cost prohibitive to incorporate in individual refrigerated appliance 10 . therefore , the computing cloud 20 provides this hardware and software resources through secure connections to perform temperature and all other control functions for refrigerated appliance 10 . one of the innovative features of this disclosure is to take advantage of the computational resources in , the computing cloud 20 to perform the control method of refrigerated appliance 10 , and to use such resources to incorporate non - linear and time variant control strategies , including , methods and models to minimize energy consumption , and to incorporate data analysis to evaluate and compare different control methods . moreover , the control method may be individually selected for each refrigerated appliance 10 , according to its expected use and location to obtain higher energy efficiency , and adapted to account for local and changing environmental and operational conditions . in some embodiments , the cloud computing 20 may store sensor data and energy consumption data acquired from refrigerated appliance 10 , as well as other data used to estimate the efficiency of the refrigerated appliance 10 and of specific components , such as the compressor . dedicated analytics software can be used to analyze the collected data , evaluate and compare different control methods and to provide information to improve the methods or to devise new ones . in some embodiments , the control algorithm may leverage the service - oriented architecture of the cloud computing 20 to access data or other computational and resources available from external services , such as weather forecast for the locations of refrigerated appliance 10 , details of relevant events such as receiving new material or foodstuff to be stored in a refrigerated appliance from a shipping company , price or demand - response signals from utilities or other requests related to the operation of a smart - grid and the need for electric load shaving and shifting . refrigerated appliance 10 is a refrigeration system controlled with a method in a computing cloud 20 . fig2 is the block diagram of an exemplary refrigerated appliance with a cloud - based control method , according to some embodiments of the present invention . refrigerated appliance 10 includes a microprocessor 11 capable of executing firmware 13 stored in memory 12 , an interface circuit 14 used to connect to refrigerator sensors 50 and actuators 60 , and a communication circuit 15 used to connect to cloud computing 20 . the refrigerated appliance actuators 60 set the state of the relays that controls the equipment used in the refrigerated appliance to perform the vapor compression cycle , such as compressor , evaporator fan , and other components such as airflow fans , defrost heater , lights , and air damper . the refrigerated appliance sensors 50 acquire data from temperature , humidity , energy consumption and other sensors inside the appliance and outside . refrigerated appliance firmware 13 incorporates at least functions that acquire sensor data 50 and control the state of actuators 60 through the interface circuit 14 , and that allow the refrigerated appliance to communicate to cloud computing 20 through the communication circuit 15 . the appliance firmware 13 allows a software task executed remotely in cloud computing 20 to know and change the refrigerated appliance equipment state through the interface circuit 14 . other functions of the refrigerated appliance firmware 13 include protocol and encryption methods to enable secure communication with cloud computing 20 , such as the transport layer security ( tls ) protocol . refrigerated appliance memory 12 stores the firmware 13 and it may store other configuration data that allow the refrigerated appliance communication circuit to connect to gateways or access points in the access network used by the refrigerated appliance to connect to cloud computing 20 . from the above description , it should be apparent that the present invention provides at least the following advantages . first , refrigerated appliance control methods are not limited by resources available in the appliance and are not built into the appliance at time of fabrication . second , different control methods can be developed and selected depending on intended use of refrigerated appliance , location time variant and other critical parameters . third , energy efficiency of refrigerated appliances can be incorporated as a parameter in the control method and computationally intensive optimization techniques used in the control method to minimize energy consumption while guaranteeing safety of material stored in the refrigerated compartments of the appliance . fourth , the cloud - based control method described can be provided to refrigerator appliance manufacturers as a service , incorporating additional functions such as detection of anomalies , malfunctioning of equipment and notification of exceptions or temperature out of range , to the end - user of the refrigerated appliance . fifth , the stem described allows for collection of field data about the operation of a refrigerated appliance and its energy consumption at a scale that has no precedent . such data may be used to evaluate energy efficiency performance of refrigerated appliances for regulatory compliance , inspire changes in policies and devise new and more energy efficient control methods . while particular embodiments of the present invention and their advantages have been shown and described , it should be understood that various changes , substitutions , and alterations could be made therein without departing from the spirit and scope of the invention .