The present invention provides a vehicle air-conditioning system comprising: a pair of evaporation units which cause heat exchange between a refrigerant and air, and which are arranged to be spaced apart from each other so as to discharge cold air in different directions; one expansion valve, which expands a low-temperature and high-pressure refrigerant so as to supply same to the evaporation unit; an inlet pipe in which the refrigerant of the expansion valve moves to a first evaporation unit; a first moving pipe in which the refrigerant having circulated through one region of the first evaporation unit moves to a second evaporation unit; a second moving pipe in which the refrigerant having circulated through the second evaporation unit moves to the first evaporation unit; and an outlet pipe through which the refrigerant having circulated through the first evaporation unit flows out.

An air-conditioning management system includes: an air conditioning apparatus configured to carry out a refrigerant recovery operation of recovering a refrigerant from a refrigerant circuit that connects an outdoor unit and an indoor unit and sending the recovered refrigerant to each recovery unit of the outdoor unit; and a control unit configured to make a determination whether all the recovered refrigerant is sendable to each recovery unit before a start of the refrigerant recovery operation by the air conditioning apparatus, and to output, when determining that all the recovered refrigerant is not sendable to each recovery unit, a command for notifying the determination.

An outdoor unit 3 of an air conditioner 1 includes an outdoor control unit 31 having a first control mode and a second control mode different from each other as control modes of a refrigerant recovery operation for recovering a refrigerant of a refrigerant circuit 9. A flow rate of the refrigerant in the refrigerant circuit 9 in the first control mode is larger than a flow rate of the refrigerant in the refrigerant circuit 9 in the second control mode.

A thermal management system includes a closed-circuit refrigerant system to circulate a refrigerant fluid. The system includes a compressor to compress a flow of the refrigerant fluid. The system includes a condenser coupled to the compressor. The system includes a receiver to store at least a portion of the refrigerant fluid. The receiver is coupled to the condenser. The system includes a pump to circulate the refrigerant fluid through at least a portion of the system. The pump is coupled to the receiver. The system includes a flow control device to control the flow of the refrigerant fluid to an evaporator. The flow control device is coupled to the pump. The evaporator extracts heat from at least one heat load that is in thermal conductive or convective contact with the evaporator.

A thermal management system includes a closed-circuit refrigerant system to circulate a refrigerant fluid. The system includes a compressor to compress a flow of the refrigerant fluid. The system includes a condenser coupled to the compressor. The system includes a receiver to store at least a portion of the refrigerant fluid. The receiver is coupled to the condenser. The system includes a pump to circulate the refrigerant fluid through at least a portion of the system. The pump is coupled to the receiver. The system includes a flow control device to control the flow of the refrigerant fluid to an evaporator. The flow control device is coupled to the pump. The evaporator extracts heat from at least one heat load that is in thermal conductive or convective contact with the evaporator.

The present invention relates to an air conditioner. In an air conditioner according to an embodiment, a scroll compressor having a refrigerating capacity of 23 kW to 58 kW and an amount of circulating refrigerant of 880 cc is used, a refrigerant mixture containing 50% or more of R32 is used as a refrigerant circulating the air conditioner, and a flexible stainless steel pipe having 1% or less of delta ferrite matrix structure on the basis of the grain size area is comprised in a refrigerant pipe. Therefore, the strength and hardness of the refrigerant pipe is maintained to be equal to or higher than those of a copper pipe, and the processability can be well maintained.

The present invention relates to an air conditioner. In an air conditioner according to an embodiment, a scroll compressor having a refrigerating capacity of 23 kW to 58 kW and an amount of circulating refrigerant of 880 cc is used, a refrigerant mixture containing 50% or more of R32 is used as a refrigerant circulating the air conditioner, and a flexible stainless steel pipe having 1% or less of delta ferrite matrix structure on the basis of the grain size area is comprised in a refrigerant pipe. Therefore, the strength and hardness of the refrigerant pipe is maintained to be equal to or higher than those of a copper pipe, and the processability can be well maintained.

An air conditioner switches between a normal refrigeration cycle and a defrosting refrigeration cycle, and includes: a refrigerant circuit that connects a first heat exchanger, a second heat exchanger, a radiation panel, and an expansion valve that regulates a flow rate of a refrigerant flowing through the radiation panel; and a controller that causes the air conditioner to switch between the normal refrigeration cycle and the defrosting cycle. During the normal refrigeration cycle, the radiation panel performs cooling or heating. During the defrosting cycle, the first heat exchanger serves as a radiator and the second heat exchanger serves as an evaporator. During the defrosting cycle, the controller causes the expansion valve to be in a fully closed state.

Provided is a vacuum adiabatic body. The vacuum adiabatic body includes a supporting unit configured to maintain a vacuum space part. The supporting unit includes a plurality of bars extending in a vertical direction between the first plate member and the second plate member. When a pitch of the bar is a, an elastic modulus of a material forming the bar is E, and a radius of a long axis is n and a radius of a short axis is m when a cross-section of the bar has an elliptical shape is n, the following equation: is satisfied.

Provided is a vacuum adiabatic body. The vacuum adiabatic body includes a supporting unit configured to maintain a vacuum space part. The supporting unit includes a plurality of bars extending in a vertical direction between the first plate member and the second plate member. When a pitch of the bar is a, an elastic modulus of a material forming the bar is E, and a radius of a long axis is n and a radius of a short axis is m when a cross-section of the bar has an elliptical shape is n, the following equation: is satisfied.