An air conditioner selection system according to the present invention is capable of efficiently selecting an air conditioner that satisfies a safety standard requirement in a case where a refrigerant leaks. An air conditioner selection system (100) is a system for selecting an air conditioner (50) including an indoor unit (52). The air conditioner selection system (100) is provided with a floor area acquisition section (12a), an allowable refrigerant amount acquisition section (12b), and an air conditioner selection section (12c). The floor area acquisition section (12a) acquires a floor area of a room (3) where the indoor unit (52) is to be installed. The allowable refrigerant amount acquisition section (12b) acquires an allowable refrigerant amount of a refrigerant allowed to remain in the room (3) at least based on the floor area acquired by the floor area acquisition section (12a). The air conditioner selection section (12c) selects the air conditioner (50) including the indoor unit (52) installable in the room (3) at least based on the allowable refrigerant amount acquired by the allowable refrigerant amount acquisition section (12b).

The present invention relates to an air conditioner. The air conditioner according to the present embodiment has a refrigeration capacity of 7 kW to 11 kW, inclusive, and uses, as a refrigerant, a mixed refrigerant containing 50% or more of R32, and since a refrigerant pipe therein is made of a ductile stainless steel material having 1% or less of a delta-ferrite matrix structure with respect to the grain size area thereof, and includes a suction pipe guiding the suction of the refrigerant into a compressor and having an outer diameter of 15.88 mm, the refrigerant pipe can maintain strength and hardness as good as or better than those of a copper pipe, while also maintaining good processability.

The present invention relates to an air conditioner. The air conditioner according to an embodiment of the present invention has a refrigeration capacity of 16 kW to 28 kW, inclusive, and uses, as a refrigerant, a mixed refrigerant containing 50% or more of R32, and a refrigerant pipe therein includes a ductile stainless steel pipe having 1% or less of a delta-ferrite matrix structure with respect to the grain size area thereof. The refrigerant pipe includes a suction pipe for guiding the suction of the refrigerant into a compressor, and the outer diameter of the suction pipe is formed to be 19.05 mm and the inner diameter thereof is formed to be 18.07 mm or less. Also, the refrigerant pipe includes a discharge pipe for guiding the discharge of the refrigerant compressed by the compressor, and the outer diameter of the discharge pipe is formed to be 12.70 mm and the inner diameter thereof is formed to be 12.04 mm or less.

A refrigeration system includes a heat source unit, a plurality of utilization units, a height-associated value detection unit and a pressure control unit. The heat source unit has a compressor and a heat source-side heat exchanger that functions as a radiator. Each utilization unit has a pressure reducer and a utilization-side heat exchanger that functions as an evaporator. The height-associated value detection unit detects a height-associated value of each utilization unit. The height associated value of each utilization unit corresponds to a height of the utilization unit. The height of each utilization unit is a vertical distance between the utilization unit and the heat source unit. The pressure control unit determines whether each of the utilization units is in operation or stopped and performs refrigerant pressure control based on the height-associated values of the utilization units that have been determined to be in operation.

A compressor suction pipe includes a bent portion at least including a first pipe segment on the most upstream side with respect to flow of a fluid to be compressed, a second pipe segment connected to a suction side of a compressor and extending in a direction different from the extension direction of the first pipe segment, and a third pipe segment disposed between the first pipe segment and the second pipe segment and extending in a direction different from the extension directions of the first and second pipe segments, and at least one partition extending at least from an intermediate portion of the first pipe segment at least to an intermediate portion of the second pipe segment in the bent portion and dividing an interior of the bent portion. The partition extends in a direction intersecting a virtual plane including an incircle that touches an axis of the first pipe segment on an upstream side of a downstream end of the first pipe segment and touches an axis of the second pipe segment.

A second flow path switching apparatus includes a first distribution apparatus configured to distribute refrigerant to a plurality of refrigerant paths in a first heat exchange portion, a second distribution apparatus configured to distribute refrigerant to the plurality of refrigerant paths in the first heat exchange portion and a second heat exchange portion, and a switch portion configured to switch connection of a refrigerant inlet of a first heat exchange apparatus to the first distribution apparatus or to the second distribution apparatus and switch whether refrigerant which flows out of a refrigerant outlet of the first heat exchange portion is allowed to pass through the second heat exchange portion or to merge with refrigerant which flows out of a refrigerant outlet of the second heat exchange portion in accordance with whether an order of circulation of the refrigerant is a first order (cooling) or a second order (heating).

An indoor unit, being configured to constitute a refrigeration apparatus including a refrigerant circuit, includes: a heat exchanger; and a plurality of refrigerant pipes. R32 refrigerant is enclosed in the refrigerant circuit. At least one of the plurality of refrigerant pipes that circulates the R32 refrigerant has an outer diameter of (Do-1)/8 inches while another of the plurality of refrigerant pipes that circulates R410A refrigerant has an outer diameter of Do/8.

A heat pump includes a compressor that is connected via two refrigerant-conveying fluid lines to a heat pump component through which refrigerant flows, wherein each fluid line has a longitudinal axis, wherein an imaginary direction vector which coincides with the longitudinal axis points, on the route between the compressor and the heat pump component, at least once in a different direction to an imaginary starting direction vector which begins at the compressor, where it likewise coincides with the longitudinal axis, wherein the longitudinal axis extends in a space having three imaginary, mutually perpendicular planes. The fluid line is shaped such that the direction vector, on the route between the compressor and the heat pump component, and with respect to all three planes, extends so as to be rotated by an angle of more than 180? relative to the starting direction vector at least once.

Described is a stopper including a filtering unit housed in an interior of a liquid receiver main body through which a refrigerant passes, a fixed portion that includes a screw portion that is screwed into an inner peripheral face of the liquid receiver main body, a sealing member in contact with the inner peripheral face of the liquid receiver main body, thereby preventing a leakage of a refrigerant to the fixed portion, and a movable connection portion provided between the filtering unit and the fixed portion for linking the filtering unit to the fixed portion in such a way that the filtering unit is not caused to follow a rotation of the fixed portion, and in such a way that the filtering unit is caused to follow an axial direction movement of the fixed portion.

In one embodiment, an apparatus includes an insert for an evaporator coil. The insert is a curved wire located within the evaporator coil. The insert for the evaporator coil reduces refrigerant charge in the evaporator coil and causes refrigerant flowing through the evaporator coil to change direction.