Abstract: An air-conditioner which performs an appropriate control in the event of a leak of refrigerant. The air-conditioner includes a refrigerant circuit, a refrigerant leak sensor which senses a leak of refrigerant in the refrigerant circuit, an indoor fan which delivers air to the indoor heat exchanger, and an indoor control circuit which, upon sensing a leak of refrigerant by the refrigerant leak sensor, controls the indoor fan based on whether the refrigerant sealed in the refrigerant circuit is flammable.

Abstract: A leakage sensing apparatus for sensing refrigerant leakage from an air-conditioner in an air-conditioned space air-conditioned by the air-conditioner includes a leakage sensing unit configured to sense the refrigerant leakage, a communication unit configured to transmit notification information indicating that the leakage has been sensed to an external apparatus via a communication network in a case where the leakage sensing unit has sensed the refrigerant leakage, and a power source unit configured to supply power to the leakage sensing apparatus independently of ON/OFF of a power supply to the air-conditioner.

Abstract: A fan includes a fan member, a motor that drives to rotate the fan member, and a rotating shaft that is connected to the fan via a vibration prevention member and transmits a turning force of the motor to the fan. The vibration prevention member is an elastic member that connects an inner cylinder made of metal included in the rotating shaft and an outer cylinder made of metal included in the fan member. At least one of an outer circumferential section of the inner cylinder and an inner circumferential section of the outer cylinder is configured in a polygonal shape when viewed from the rotating shaft direction. A turning force received by the vibration prevention member acts as compression stress on an adhesion interface between a vibration prevention material and metal.

Abstract: Provided is an air-conditioner which performs an appropriate control in the event of a leak of refrigerant. The air-conditioner (100) is provided with: a refrigerant circuit (10); a refrigerant leak sensor (25) which senses a leak of refrigerant in the refrigerant circuit (10); an indoor fan (Fi) which delivers air to the indoor heat exchanger (15); and an indoor control circuit 32 which, upon sensing a leak of refrigerant by the refrigerant leak sensor (25), controls the indoor fan (Fi) based on whether the refrigerant sealed in the refrigerant circuit 10 is flammable.

Abstract: A fan includes a fan member, a motor that drives to rotate the fan member, and a rotating shaft that is connected to the fan via a vibration prevention member and transmits a turning force of the motor to the fan. The vibration prevention member is an elastic member that connects an inner cylinder made of metal included in the rotating shaft and an outer cylinder made of metal included in the fan member. At least one of an outer circumferential section of the inner cylinder and an inner circumferential section of the outer cylinder is configured in a polygonal shape when viewed from the rotating shaft direction. A turning force received by the vibration prevention member acts as compression stress on an adhesion interface between a vibration prevention material and metal.

Abstract: An indoor unit of an air conditioner of the present invention includes a cabinet; an air inlet through which air is sucked into the cabinet; a centrifugal fan which blows the air sucked in to the surrounding portions; and an a heat exchanger which is provided in the direction of air supply of the centrifugal fan and allows heat exchange between the air and a refrigerant flowing thereinside, in which the following equation is satisfied: 0.16?L/D?0.19, where D is an outer diameter of the centrifugal fan and L is a distance between the centrifugal fan and the heat exchanger in their closest positions. Thus, a variation in a velocity distribution created in the heat exchanger can be suppressed, and the indoor unit of the air conditioner which achieves an improved energy saving property due to a reduced pressure loss and an improved heat exchange efficiency of the heat exchanger can be provided.

Abstract: In a conventional compressor, since a motor and a mechanical section of the compressor are disposed in one and the same closed container, the motor is exposed to high-temperature coolant and heated, and the efficiency of the motor is lowered. Further, during the operation of the compressor, the coolant circulating in the refrigerating cycle conveys additional heat generated by the motor coil. Thus the efficiency of the refrigerating cycle is lowered. The compressor according to the present invention includes a compression chamber divided into a closed chamber and an open chamber separated by a magnetic induction plate from each other. The closed chamber is filled with high temperature and pressure coolant and the rotor of the motor is disposed in the closed chamber, and the stator of the motor is disposed in the open chamber.

Abstract: A self-starting type axial gap synchronous motor includes a stator in which plural small stators are arranged on the same circumference; disc-shaped rotors in each of which plural permanent magnets facing the stator are arranged on the same circumference; and a shaft coupled to the rotors. Each of the disc-shaped rotors includes a metal frame that is provided so as to surround the plural permanent magnets arranged on the same circumference, and each of the metal frames is configured using a nonmagnetic and conductive material. Accordingly, it is possible to obtain a self-starting type axial gap synchronous motor that can be started by a commercial electric power without using an inverter, and a compressor and a refrigeration cycle apparatus using the same.

Abstract: A heat exchanger, as mounted on the outdoor unit or indoor unit of an air conditioner system, is formed with a plurality of passages for a refrigerant. To this heat exchanger, there is connected a refrigerant distributor for distributing the refrigerant to the individual passages or for collecting the distributed refrigerant. This refrigerant distributor is constructed by soldering two corrugated plate members to form a refrigerant conduit between the corrugations. Before these plate members are soldered, the refrigerant conduit is either partially constricted to form a throttle portion or partially bulged to form a filter portion by fitting a filter member in the bulging portion when the plate members are soldered. Thus, the refrigerant distributor can set the diversion of the refrigerant to a predetermined ratio by the simple device while reducing the space and lowering the cost.