An air conditioner unit includes a refrigeration loop, a variable speed compressor coupled to the refrigeration loop, an indoor temperature sensor, an electric heater, and a controller operably coupled to the variable speed compressor, the indoor temperature sensor, and the electric heater. The controller is configured to operate the variable speed compressor at a target speed, identify an auxiliary heating trigger of the air conditioner unit, and operate the electric heater according to the auxiliary heating trigger.

An air-conditioning apparatus is able to ensure an appropriate flow rate of refrigerant and an appropriate amount of oil returned to a compressor that match operation conditions regardless of an operating state of a refrigerant circuit and a change in an operation condition. The air-conditioning apparatus includes: a first detector configured to detect a refrigerant temperature within an accumulator; a storage unit configured to store information regarding a two-layer separation temperature of refrigerant and refrigerating machine oil; a determiner configured to compare the refrigerant temperature with the two-layer separation temperature and determine a two-layer separation state of the refrigerant and the refrigerating machine oil; a second detector configured to detect a state of the refrigerant sucked by the compressor; and a control unit configured to adjust an opening degree of a flow control valve on the basis of the two-layer separation state and a state of the sucked refrigerant.

An apparatus is provided for absorbing shocks and a control method capable of protecting cargo from shocks without a separate additional system in a cargo hold of a moving object. The apparatus for absorbing shocks includes at least one inflatable member disposed in a moving object, an air conditioner module installed on the moving object, and a supply pipe connected between the air conditioner module and the inflatable member and providing a refrigerant of the air conditioner module to the inflatable member.

An air-conditioning system capable of suppressing power consumption and maintaining the indoor temperature at a constant level includes a refrigerant circuit in which a compressor, a heat source-side heat exchanger, an expansion device, and a load-side heat exchanger are sequentially connected via a pipe, an inverter that drives the compressor, an indoor temperature sensor that detects an indoor temperature, and a controller that receives a thermostat ON signal and a thermostat OFF signal and controls the inverter according to the thermostat ON signal and the thermostat OFF signal. The controller assumes, upon receipt of the thermostat OFF signal, that the indoor temperature detected at that time is a target temperature, and regulates an output frequency of the inverter so as to maintain a difference between the indoor temperature and the target temperature in a predetermined range.

The propagation of a disproportionation reaction of a refrigerant is suppressed. Disclosed is a method that uses a composition as a refrigerant in a compressor, in which the composition includes one or more compounds selected from the group of ethylene-based fluoroolefins, 2,3,3,3-tetrafluoropropene, and 1,3,3,3-tetrafluoropropene, the compressor forms a refrigerant circuit together with first to ninth refrigerant pipes, a gas-side refrigerant communication pipe, and a liquid-side refrigerant communication pipe, and the compressor includes first to fifth heat absorbing portions in each of which a heat capacity of a portion with a melting point greater than or equal to 1,000° C. is greater than or equal to 6.5 J/K.

An air conditioning unit includes: a first refrigeration system including a first evaporator, a first compressor, a first condenser, a first one-way valve, and a first throttling element connected in sequence in a loop as well as a second one-way valve connected in parallel with the first compressor, and a first fluorine pump connected in parallel with the first one-way valve; and a second refrigeration system including a second evaporator, a second compressor, a second condenser, a third one-way valve, and a second throttling element connected in sequence in a loop as well as a fourth one-way valve connected in parallel with the second compressor, and a second fluorine pump connected in parallel with the third one-way valve, where the first evaporator and the second evaporator are arranged front and rear in sequence along a return air cooling duct.

An air conditioner unit and method of operating the same includes performing an operating cycle in a feedback control mode, including adjusting the an electronic expansion valve (EEV) to minimize an error between a measured superheat and a target superheat using a PI controller, determining that a target compressor speed has changed by greater than a predetermined speed threshold, and initiating a linear control mode of the operating cycle, including adjusting the EEV using a valve position equation that is a function of the target compressor speed, an indoor temperature, and an outdoor temperature. The controller may also start a transition timer upon initiation of the linear control mode, transition back into a feedback control mode upon expiration of the transition timer, and initialize the integral term of the PI controller based on the EEV position from the linear control mode.

An air conditioner unit includes a refrigeration loop including a condenser and an evaporator, a compressor for circulating refrigerant, and an electronic expansion valve. A controller monitors an operating superheat of the refrigerant across the evaporator, identifies a superheat fault condition based on at least one of the operating superheat, a target valve position of the electronic expansion valve, or a compressor speed, stops the compressor in response to identifying the superheat fault condition, and initiates a calibration process of the electronic expansion valve.

An air conditioner unit includes a refrigeration loop including an indoor heat exchanger and an outdoor heat exchanger, a compressor for circulating refrigerant, and an electronic expansion valve. A controller receives a command to perform an operating cycle at a target compressor speed, determines a starting position of the electronic expansion valve using a valve position equation that is a function of the target compressor speed, an indoor temperature, an outdoor temperature, and empirically determined constants, and initializes the operating cycle with the electronic expansion valve at the starting position.

An apparatus for storing a mask includes a main body comprising a first region and a second region, the first region having a plurality of mask containers, a gas supply pipe having an outer portion outside of the main body, a fan in the first region to propel the gas from the second region to the first region, a filter disposed at a front end and/or a rear end of the fan, a heat exchanger in the second region and configured to exchange heat with the flowing gas, a Peltier element at the outer portion of the gas supply pipe, a first sensor installed in the gas supply pipe upstream of the Peltier element, a second sensor installed in the second region in a lower position to the heat exchanger, and a controller connected to the first and second sensors and the Peltier element.