Abstract: A refrigerant flow rate adjustment device and a system using the same include a refrigerant provided at a quantitative flow rate to a heat exchanger such that the occurrence of a liquid refrigerant is reduced at an outlet end of an evaporator. The refrigerant flow rate adjustment device and system prevent the occurrence of the liquid refrigerant at the outlet end of the heat exchanger, prevent an increase in load, and prevent a lubrication defect of a compressor.

Abstract: A method and a system for sensing engine oil deterioration are disclosed. The method includes measuring an engine RPM, load (Load), and an engine temperature (Temp), calculating the amount of change in a deterioration factor (f (RPM, Load, Temp) of engine oil per revolution of an engine using the measured engine RPM, load, and the engine oil temperature, and then calculating the engine oil deterioration degree at a current time point by accumulating a value obtained by multiplying the calculated amount in change of the deterioration factor (f (RPM, Load, Temp) by an engine revolutions during a predetermined sampling cycle (?r) to a previous engine oil deterioration degree.

Abstract: The present invention relates to a membership processing method comprising the steps of: enabling a franchise information processing device to receive franchise registration request information of a customer for registering a particular company as a franchise and to transfer the franchise registration request information to a corresponding company terminal; mapping corresponding company information with information on the customer who has requested the franchise registration, and classifying and registering the company information as the franchise of the corresponding customer; receiving a notification message including customer benefit information from a predetermined company terminal; and transferring the notification message including the customer benefit information to a client terminal of the corresponding customer, if the company which has transmitted the notification message is a registered franchise.