An air conditioning device is provided. The air conditioning device includes a power supplier, a compressor driver, a fan driver, a temperature sensor, a vibration sensor, and an operation processing controller. The power supplier has an input end receiving an input power source and generates a first operating power source and a second operating power source according to the input power source. The compressor driver operates according to the first operating power source to generate a first drive signal to drive a compressor. The fan driver operates according to the first operating power source to generate a second drive signal to drive a fan. The vibration sensor detects vibration information of the air conditioning device. The operation processing controller operates according to the second operating power source and controls the power supplier according to the vibration information to determine whether to cut off supply of the first operating power source to ensure safe operation of the air conditioning device.

A vapor compression system includes a compressor, a first heat exchanger, an expansion valve and a second heat exchanger arranged serial refrigerant flow path; a first fan configured to direct air over the first heat exchanger; a controller coupled to the first fan and the compressor, the controller configured to: set a compressor discharge superheat limit; determine a compressor discharge superheat; compare the compressor discharge superheat to the compressor discharge superheat limit; and when the compressor discharge superheat is less than the compressor discharge superheat limit, the controller reducing at least one of a compressor speed and a first fan speed.

A refrigeration cycle apparatus includes a refrigerant circuit and a controller for controlling the refrigerant circuit. The refrigerant circuit includes a compressor, a condenser, a pressure-reducing device and an evaporator. Refrigerant circulating through the refrigerant circuit contains propane or propylene. The controller sets a degree of superheat of refrigerant at an entrance port of the compressor to be a value greater than or equal to 10 degrees.

An electronic expansion valve, a heat exchange system, and a control for controlling an electronic expansion valve. The electronic expansion valve includes: a valve body; a first temperature sensor configured to detect an evaporator temperature T.sub.eva; a second temperature sensor configured to detect a compressor inlet temperature T.sub.sue; a third temperature sensor configured to detect a compressor outlet temperature T.sub.dis; a fourth temperature sensor configured to detect a condenser temperature T.sub.con; and a controller, which is associated with the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor, and which adjusts an opening degree of the valve body based on temperature signals from the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor.

A refrigerant-amount determination kit includes a sensor and a processor. The sensor is mounted at least temporarily on at least one of a portion of a refrigeration cycle apparatus and the periphery of the refrigeration cycle apparatus. The refrigeration cycle apparatus is an apparatus having a refrigerant circuit that includes a compressor, a condenser, and an evaporator. The processor determines the amount of a refrigerant in the refrigerant circuit based on a detection result detected by the sensor during operation of the refrigeration cycle apparatus.

An air-conditioning apparatus includes a refrigerant circuit including first and second load-side heat exchangers, a first flow switching unit located upstream of the second load-side heat exchanger, and a second flow switching unit located downstream of the second load-side heat exchanger, wherein the first flow switching unit is configured to be switched between a first state in which refrigerant communication between a compressor and the second load-side heat exchanger is blocked and a second state in which the compressor is in refrigerant communication with the first and second load-side heat exchangers, and the second flow switching unit is configured to be switched between a third state in which refrigerant communication between the second load-side heat exchanger and a heat-source-side heat exchanger is blocked and a fourth state in which the first load-side heat exchanger is in refrigerant communication with the second load-side heat exchanger and the heat-source-side heat exchanger.

A system for monitoring health of refrigerated storage containers includes an instantaneous health module configured to determine instantaneous health values for a refrigerated storage container based on parameters measured by sensors of a refrigeration system of the refrigerated storage container during a trip of the refrigerated storage container. A statistics module is configured to, after completion of the trip of the refrigerated storage container, determine statistical values based on the instantaneous health values determined for the trip. A health module is configured to determine an overall health value for the refrigerated storage container at the completion of the trip based on the statistical values and to store the overall health value for the refrigerated storage container in memory in association with a unique identifier of the refrigerated storage container.

A method for controlling a fan (6) of a vapour compression system (1) is disclosed, the fan (6) being arranged to provide a secondary fluid flow across a heat rejecting heat exchanger (3). A temperature difference, T=T.sub.outT.sub.amb, between a temperature, T.sub.out, of refrigerant leaving the heat rejecting heat exchanger (3) and a temperature, T.sub.amb, of ambient air of the heat rejecting heat exchanger (3) is established. A setpoint value, T.sub.setp, for the temperature difference, T, is obtained, the setpoint value, T.sub.setp, being dependent on the fan speed of the fan (6) in such a manner that the setpoint value, T.sub.setp, increases as the fan speed increases. The fan speed of the fan (6) is controlled in order to control the temperature difference, T, in accordance with the obtained setpoint value, T.sub.setp.

An illustrative example method of controlling a heat pump system includes operating in a defrost mode to provide heat to an outdoor heat exchanger for defrosting at least a portion of the outdoor heat exchanger, controlling a fan to be inoperative during the defrost mode, operating in a heating mode to provide heat within a temperature-conditioned space subsequent to operating in the defrost mode, controlling the fan to remain inoperative for an initial period at a beginning of operating in the heating mode, and controlling the fan to operate during the heating mode after the initial period to cause airflow across at least the portion of the outdoor heat exchanger.

A refrigeration cycle apparatus is a refrigeration cycle apparatus having a refrigerant circuit having a compressor, a condenser, a supercooler, an expansion device, and an evaporator connected by a refrigerant pipe, and configured to circulate refrigerant containing refrigerant having a temperature gradient, wherein the supercooler sets a degree of supercooling of the refrigerant, which is a temperature difference between a temperature from the condenser to a refrigerant flow inlet of the supercooler and a temperature in a refrigerant flow outlet on a downstream side of the supercooler, to be larger than the temperature gradient generated at a time of refrigerant shortage of the refrigerant between the refrigerant flow inlet and the refrigerant flow outlet of the supercooler, the refrigeration cycle apparatus including a refrigerant amount determination unit configured to compare a determination threshold value set to a value larger than the temperature gradient of the refrigerant with the degree of supercooling of the refrigerant, and determine whether or not there is a shortage of a refrigerant amount filled in the refrigerant circuit.