Abstract: An air conditioner includes switching valves that switch a circulation path of refrigerant circuit between an operation in which an indoor heat exchanger and a heat storage heat exchanger function as a condenser and an outdoor heat exchanger functions as an evaporator and another operation in which the indoor heat exchanger and the outdoor heat exchanger function as a condenser and the heat storage heat exchanger functions as an evaporator, a first flow path that connects the indoor heat exchanger and the outdoor heat exchanger, a second flow path that connects the heat storage heat exchanger and a branch portion in the first flow path, a first expansion valve that adjusts a flow rate of a refrigerant flowing between the indoor heat exchanger and the branch portion, and a second expansion valve that decompresses a refrigerant passing between the indoor heat exchanger and the first expansion valve.

Abstract: An air conditioner includes an outdoor machine that includes a compressor and an outdoor heat exchanger, an indoor machine that includes an indoor heat exchanger and that heats inside of a room using heat supplied from the outdoor machine, an indoor temperature sensor that detects temperature inside the room, a heat accumulation circuit that includes a heat accumulating unit and that accumulates heat, which is generated in the outdoor machine, in the heat accumulating unit, and a control unit, wherein the control unit controls the compressor in such a way that detection value obtained by the indoor temperature sensor becomes equal to the set temperature, and, when the compressor operates at minimum rotation frequency and when detection value obtained by the indoor temperature sensor exceeds the set temperature, operates the heat accumulation circuit.

Abstract: A communication adapter connected to an indoor unit included in an air conditioner includes a communication unit, a determination unit, and a communication control unit. The communication unit communicates data to an air conditioning control apparatus that performs centralized control of a plurality of air conditioners. The determination unit determines whether or not transmission target data is communicated by using encryption communication. The communication control unit controls, when the transmission target data is communicated by using the encryption communication, the communication unit in order to communicate the transmission target data by using the encryption communication. Consequently, it is possible to decrease a laying cost of a dedicated communication cable and reduce a communication load needed for data communication related to the air conditioners in an existing communication network at the time of central control performed on the air conditioners.

Abstract: An air conditioner according to an embodiment of the present invention includes: a refrigerant circuit including a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a pressure reducer that is disposed between the outdoor heat exchanger and the indoor heat exchanger; an outdoor fan that blows the air to the outdoor heat exchanger; an indoor fan that blows the air to the indoor heat exchanger; and a control device that sets an upper limit value of a rotational frequency of the outdoor fan in accordance with a rotational frequency of the indoor fan.

Abstract: A refrigeration device includes: a high-order side refrigerant circuit configured such that a high-order side heat medium heat exchanger configured to perform heat-exchange with a heat medium and a cascade heat exchanger are sequentially connected via refrigerant pipes; a low-order side refrigerant circuit configured such that the cascade heat exchanger, a low-order side heat medium heat exchanger connected in parallel with the cascade heat exchanger and configured to perform heat-exchange with the heat medium, and a low-order side heat exchanger are sequentially connected via refrigerant pipes; and a control unit configured to control the high-order side refrigerant circuit and the low-order side refrigerant circuit. The control unit cab switch between the single operation and the dual operation. The low-order side heat medium heat exchanger includes low-order side cutoff units, and the high-order side heat medium heat exchanger includes high-order side cutoff units.

Abstract: A heat pump device includes a refrigerant circuit that includes a compressor, a water circuit, that includes a flow adjustor that adjusts a flow of the water, and a terminal that is connected to the water circuit. The heat pump device includes a first detector that detects a condensing pressure of a refrigerant of the refrigerant circuit, a second detector that detects a discharged heated-water temperature that is a temperature of the water flowing into the terminal, and a controller that executes a protection operation of adjusting the condensing pressure of the refrigerant when the condensing pressure that is detected by the first detector exceeds a pressure threshold. The controller selects, as a subject of control in the protection operation, any one of the compressor and the flow adjustor based on the discharged heated-water temperature that is detected by the second detector.

Abstract: There is provided an electric motor in which a flange portion can be miniaturized in a radial direction while securing a space for fastening a metal member to the flange portion.

Abstract: There is provided a permanent magnet electric motor that can be downsized in a rotation axis direction and can also suppress a leakage flux. The permanent magnet electric motor includes: a columnar rotor including a permanent magnet portion annularly disposed; a shaft disposed along a rotation axis of the rotor; a cylindrical stator core disposed on an outer circumferential side of the rotor; a main body including a shell integrally formed with the stator core; a bracket attached to one end side of the main body; and a bearing that rotatably supports the shaft. The bracket includes a bearing house portion that stores the bearing, and a non-magnetic portion that is connected to the bearing house portion. The bearing house portion is disposed on an inner diameter side relative to the permanent magnet portion as viewed from an axis direction of the rotation axis, and an edge portion of the bearing house portion on an outer diameter side is covered with the non-magnetic portion.

Abstract: An outdoor machine including a housing; a base heater disposed between a heat exchanger unit that is disposed on a side of a rear plate of the housing and the base of the housing, and fixed to a base; and a fixing tool configured to fix the base heater to the base, in which the fixing tool includes a two-way fixing tool configured to come into contact with an upper portion on a side opposite to a lower portion in a case in which a side coming into contact with the base is the lower portion and a back portion on the side of the rear plate in portions connecting the lower portion and the upper portion in a periphery of the base heater, and to fix the base heater to the base, and a three-way fixing tool configured to come into contact with portions other than the lower portion.

Abstract: An indoor unit of an air conditioner prevents spread of fire from an electrical component box. An indoor unit of an air conditioner according to an embodiment of the present invention is an indoor unit of an air conditioner, including an electrical component box that includes a main body portion and a lid portion and houses an electrical component. The electrical component box includes the lid portion and the main body portion into which the lid portion is fitted. A first fire spread prevention member formed of a first non-flammable material having flexibility is provided at a joint formed when the main body portion and the lid portion are combined or at a portion adjacent to the joint in the electrical component box.

Abstract: A compressor main body container includes a main shell having a vertical cylindrical shape, a top shell having a cup shape, and a bottom shell having a cup shape, and an interior portion of the main shell is hermetically sealed by securing an opening side of the top shell to an upper end portion of the main shell at a first welded portion by welding, and securing an opening side of the bottom shell to a lower end portion of the main shell at a second welded portion by welding. The accumulator container includes an accumulator shell having a cup shape, and an interior portion of the accumulator shell is hermetically sealed by securing an opening side of the accumulator shell to an opposite opening side of the bottom shell at a third welded portion by welding at a position lower than a position of the second welded portion in the compressor main body container.

Abstract: An air conditioning apparatus includes a pump flow regulating valves that are respectively provided for indoor heat exchangers, heat medium temperature detection units, and a control unit that controls the pump such that a heat medium at a predetermined flow rate circulates through a heat medium circuit, and controls the flow regulating valves such that a flow rate of a heat medium flowing through a largest load indoor heat exchanger becomes equal to a largest heat load target flow rate calculated based on a heat load on the largest heat load indoor heat exchanger and a flow rate of a heat medium flowing through a residual heat load indoor heat exchanger becomes equal to a residual heat load target flow rate calculated based on a heat load on the residual heat load indoor heat exchanger and a temperature of a heat medium flowing into the largest load indoor heat exchanger.

Abstract: A hermetic type compressor includes: a compressor main-body container that has a vertically cylindrical shape, and that has a discharge pipe and a suction pipe for a refrigerant; an accumulator container that is connected to the suction pipe; a compression section that is disposed in the compressor main-body container, that compresses the refrigerant sucked from the accumulator container via the suction pipe, and that discharges the compressed refrigerant from the discharge pipe; and a motor that is disposed inside the compressor main-body container, and that drives the compression section. In the hermetic type compressor, the accumulator container includes a cup shape accumulator shell that has the opening side thereof bonded to the compressor main-body container.

Abstract: An air conditioner includes an outdoor unit, an indoor unit and a refrigerant circuit. The conditioner performs heating operation in which an indoor heat exchanger functions as a condenser for a refrigerant that is compressed by a compressor and an outdoor heat exchanger functions as an evaporator for a refrigerant that is condensed by the indoor heat exchanger. The conditioner includes a memory, and processing circuitry configured to estimate an amount of refrigerant that remains in the circuit by using an operating state quantity of the conditioner in the heating operation. The estimating includes a plurality of different estimation models that correspond to ranges of the amount of refrigerant that remains in the circuit. One of the estimation models uses, as the operating state quantity, a degree of supercooling of refrigerant at an outlet of the indoor heat exchanger.

Abstract: A sealed compressor includes a base member that is welded to a compressor main body container and that supports the compressor main body container. The compressor main body container includes a bottom shell. The base member includes a mounting surface on which the bottom shell is mounted. At the center of the mounting surface, an opening is formed into which the central part of the bottom shell is fit. The base member is joined to the bottom shell by a plurality of welding spots formed at intervals in the circumferential direction of the opening. The plurality of welding spots are formed to extend for a predetermined length in the circumferential direction of the opening and are positioned in between the outer peripheral border of the mounting surface and the opening rim of the opening.

Abstract: There is provided an air conditioner with a refrigerant sensor installed in a room, which can reduce the amount of refrigerant leakage while limiting the installation cost of a shut-off valve. The air conditioner includes a liquid-side shut-off valve connected between an outdoor heat exchanger and an indoor unit-side expansion valve, a gas-side shut-off valve connected between an indoor heat exchanger and a compressor, a bypass passage in which one end is connected between the liquid-side shut-off valve and the indoor unit-side expansion valve and the other end is connected between the gas-side shut-off valve and the compressor, and a bypass solenoid valve configured to open and close the bypass passage.

Abstract: An air conditioning device according to an embodiment of the present invention includes: an outdoor unit including a plurality of outdoor heat exchangers and an outdoor fan that blows air to the plurality of outdoor heat exchangers; at least one indoor unit connected to the outdoor unit via a refrigerant pipe; and a control device that controls a rotation speed of the outdoor fan. The control device determines, when determining that the number of outdoor heat exchangers used is to be increased, the rotation speed of the outdoor fan such that a heat exchange amount of the outdoor heat exchanger after an increase in the number of outdoor heat exchangers used is equal to or lower than the heat exchange amount of the outdoor heat exchanger before the increase in the number of outdoor heat exchangers used.

Abstract: Provided is a cascade refrigeration system capable of suppressing a decrease in heating performance due to a rapid startup operation. The cascade refrigeration system includes: a high-order side refrigerant circuit (2) through which a high-order side refrigerant circulates; a low-order side refrigerant circuit (3) through which a low-order side refrigerant circulates, the low-order refrigerant circuit (3) including a first circulation path (23) that performs heat-exchange with the high-order side refrigerant in a cascade heat exchanger (13), and a second circulation path (26) that performs heat-exchange with a heat medium in a low-order side heat exchanger (24); and a heat medium circuit (4) through which a heat medium circulates, the heat medium exchanging heat with the high-order side refrigerant in the high-order side heat exchanger (11) and exchanging heat with the low-order side refrigerant in the low-order side heat exchanger (24).

Abstract: A cascade refrigeration cycle system includes: a high-order side refrigerant circuit through which a high-order side refrigerant circulates; a low-order side refrigerant circuit through which a low-order side refrigerant circulates; a high-order side heat accumulation circuit including a heat accumulation heat exchanger provided in parallel with a cascade heat exchanger through which the high-order side refrigerant circulates; a low-order side heat accumulation circuit including the heat accumulation heat exchanger through which the low-order side refrigerant circulates; a refrigerant temperature detecting unit configured to measure or calculate a saturation temperature of the low-order side refrigerant discharged from a low-order side compressor; a heat accumulation temperature sensor configured to measure the temperature of a heat accumulation material; and a control unit.