Abstract: An air-conditioning apparatus includes configured to, when a cooling operation mode is changed into one of multiple dehumidifying operation modes, select the one of the multiple dehumidifying operation modes on the basis of a value of a sensible heat ratio difference ?SHF that is a difference between a target sensible heat ratio acquired from an indoor temperature detected by an indoor temperature sensor, a target indoor temperature, and target indoor humidity and a theoretical minimum possible sensible heat ratio acquired from enthalpy of an indoor air, enthalpy of blown air from the indoor unit when relative humidity is 100%, and enthalpy of sensible heat.

Abstract: An outdoor unit of an air-conditioning apparatus includes a casing, and grasp portions provided at corner portions of the casing in plan view. Each grasp portion includes an outer peripheral portion at an outer periphery, and a finger hook portion protruding downward from an upper part of the outer peripheral portion and extending in a lateral direction of the finger hook portion. The outer peripheral portion includes a first opening such that a lower end portion of the finger hook portion is exposed as seen in a horizontal direction and a direction perpendicular to the lateral direction, a second opening below the finger hook portion and continuous with the first opening, and a third opening behind the finger hook portion and continuous with the second opening, the second opening and the third opening are at one of the lateral end portions.

Abstract: An air conditioner includes: an indoor unit; an outdoor unit; and a control unit that controls operation of the indoor unit and the outdoor unit. The outdoor unit includes: an outdoor unit fan that takes in air; an outside air temperature detection unit that detects an outside air temperature that is a temperature of outside air; and an air pressure acquisition unit that acquires an air pressure of outside air. The control unit calculates an air property value of air at an installation location of the air conditioner based on an outside air temperature acquired by the outside air temperature detection unit and an air pressure acquired by the air pressure acquisition unit, and controls the outdoor unit fan based on the air property value.

Abstract: A refrigeration cycle device includes a compressor to compress refrigerant, a suction-side detector to detect a pressure of the refrigerant to be suctioned into the compressor, a discharge-side detector to detect a pressure of the refrigerant discharged from the compressor, and controlling circuitry that controls the compressor. When the ratio of a second pressure value detected by the discharge-side detector to a first pressure value detected by the suction-side detector is not between a predetermined upper limit and a predetermined lower limit, the controlling circuitry controls the compressor such that the ratio falls between the predetermined upper limit and the predetermined lower limit.

Abstract: An outdoor unit of an air-conditioning apparatus includes: a terminal unit that is provided on an outer peripheral surface of a compressor, and electrically connects components provided in the compressor and outside the compressor; a side soundproof cover that covers the outer peripheral surface of the compressor except for the terminal unit; and a terminal cover that covers the terminal unit exposed from the side soundproof cover to the outside of the side soundproof cover, and soundproofs the terminal unit. The terminal cover is attached to the side soundproof cover such that the state of the terminal cover can be changed between a state in which the terminal cover covers the terminal unit and a state in which the terminal cover does not cover the terminal unit.

Abstract: An air-conditioning apparatus includes an outdoor unit and an indoor unit that include devices and a pipe constituting a refrigerant circuit and a remote control connected to the indoor unit. Each of the outdoor unit and the indoor unit includes a sensor configured to detect temperature states of the devices and the pipe. The outdoor unit or the indoor unit includes a memory configured to hold sensor information indicating a result of the detection by the sensor and control information indicating control states of the devices. The remote control includes a microcomputer configured to receive information indicating states of sections based on the sensor information and the control information, output an estimated cause of trouble as output values, and compute a value corresponding to a possibility of being cause of trouble by using a neural network, and a display unit configured to display a result.

Abstract: A refrigeration cycle device includes a compressor to compress refrigerant, a suction-side detector to detect a pressure of the refrigerant to be suctioned into the compressor, a discharge-side detector to detect a pressure of the refrigerant discharged from the compressor, and a control device having a function of controlling the compressor when the ratio of a second pressure value detected by the discharge-side detector to a first pressure value detected by the suction-side detector is not between a predetermined upper limit and a predetermined lower limit, such that the ratio falls between the upper limit and the lower limit.

Abstract: An air-conditioning system includes an air-conditioning apparatus including an outdoor unit storing outdoor-unit identification information an indoor unit storing indoor-unit identification information, and a remote controller including a third memory configured to store the outdoor-unit identification information and the indoor-unit identification information and a display unit configured to display error information when an abnormal condition occurs in the air-conditioning apparatus. The remote controller is configured to obtain the outdoor-unit identification information from the outdoor unit and to obtain the indoor-unit identification information from the indoor unit. The remote controller is configured to store the obtained outdoor-unit identification information and indoor-unit identification information into the third memory.

Abstract: An air-conditioning apparatus enables a user to recognize both a leakage of refrigerant and an abnormal condition when a refrigerant leakage condition and the abnormal condition have occurred. When a condition in which a leakage of refrigerant is detected and a condition in which an abnormality is detected have occurred together, the refrigerant leakage condition and the abnormal condition are displayed together on a display part. Consequently, when the condition in which the leakage of refrigerant is detected and the condition in which the abnormality is detected have occurred, the user is allowed to recognize the leakage of refrigerant and the abnormal condition at once.

Abstract: An outdoor unit of an air-conditioning apparatus includes a casing, and grasp portions provided at at least two respective positions at corner portions of the casing as seen in plan view. The grasp portions each include an outer peripheral portion forming an outer periphery of each grasp portion, and a finger hook portion protruding downward from an upper part of the outer peripheral portion and extending in a lateral direction of the finger hook portion.

Abstract: An outdoor unit of an air-conditioning apparatus includes: a terminal unit that is provided on an outer peripheral surface of a compressor, and electrically connects components provided in the compressor and outside the compressor; a side soundproof cover that covers the outer peripheral surface of the compressor except for the terminal unit; and a terminal cover that covers the terminal unit exposed from the side soundproof cover to the outside of the side soundproof cover, and soundproofs the terminal unit. The terminal cover is attached to the side soundproof cover such that the state of the terminal cover can be changed between a state in which the terminal cover covers the terminal unit and a state in which the terminal cover does not cover the terminal unit.

Abstract: 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.

Abstract: An air-conditioning apparatus includes an outdoor unit and an indoor unit that include devices and a pipe constituting a refrigerant circuit and a remote control connected to the indoor unit. Each of the outdoor unit and the indoor unit includes a sensor configured to detect temperature states of the devices and the pipe. The outdoor unit or the indoor unit includes a memory configured to hold sensor information indicating a result of the detection by the sensor and control information indicating control states of the devices. The remote control includes a microcomputer configured to receive information indicating states of sections based on the sensor information and the control information, output an estimated cause of trouble as output values, and compute a value corresponding to a possibility of being cause of trouble by using a neural network, and a display unit configured to display a result.

Abstract: An indoor unit of an air-conditioning apparatus includes a header main pipe to which an indoor pipe is connected at a brazed portion and header branch pipes. The header branch pipes are connected to first ends of heat-transfer pipes included in an indoor heat exchanger at brazed portions. The indoor pipe is connected to indoor refrigerant branch pipes at brazed portions. The indoor refrigerant branch pipes are connected to second ends of the heat-transfer pipes. A first leaked refrigerant receiver is disposed under the brazed portions. A first temperature sensor is disposed in the first leaked refrigerant receiver. A second leaked refrigerant receiver is disposed under flare joints connecting the indoor pipes to extension pipes, respectively. A second temperature sensor is disposed in the second leaked refrigerant receiver.

Abstract: An air-conditioning apparatus enables a user to recognize both a leakage of refrigerant and an abnormal condition when a refrigerant leakage condition and the abnormal condition have occurred. When a condition in which a leakage of refrigerant is detected and a condition in which an abnormality is detected have occurred together, the refrigerant leakage condition and the abnormal condition are displayed together on a display part. Consequently, when the condition in which the leakage of refrigerant is detected and the condition in which the abnormality is detected have occurred, the user is allowed to recognize the leakage of refrigerant and the abnormal condition at once.

Abstract: An air-conditioning system includes an air-conditioning apparatus including an outdoor unit storing outdoor-unit identification information an indoor unit storing indoor-unit identification information, and a remote controller including a third memory configured to store the outdoor-unit identification information and the indoor-unit identification information and a display unit configured to display error information when an abnormal condition occurs in the air-conditioning apparatus. The remote controller is configured to obtain the outdoor-unit identification information from the outdoor unit and to obtain the indoor-unit identification information from the indoor unit. The remote controller is configured to store the obtained outdoor-unit identification information and indoor-unit identification information into the third memory.

Abstract: An air-conditioning apparatus determines whether or not to permit an air-conditioning operation based on refrigerant amount information stored in an outdoor unit and installation height information stored in an indoor unit.

Abstract: In a refrigeration cycle apparatus, a refrigerant heat exchanger is provided within a refrigerant container, and the refrigerant heat exchanger is configured to exchange heat between refrigerant flowing through a bypass circuit and refrigerant accumulated in the refrigerant container.

Abstract: An air-conditioning apparatus includes a refrigerant circuit in which a compressor, a flow switching device, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger are connected by pipes and through which refrigerant flows, and a control device controlling an operation of the refrigerant circuit to perform switching between a heating operation and a defrosting operation. The control device includes a determination unit that determines, based on operation information regarding the refrigerant circuit, during the heating operation, whether to change a requirement for starting the defrosting operation, a changing unit that changes the requirement for starting the defrosting operation in accordance with a result of determination by the determination unit, and a switching unit that, when the requirement for starting the defrosting operation is satisfied, causes the flow switching device to perform switching to start the defrosting operation.

Abstract: A refrigeration cycle apparatus includes a refrigerant circuit connecting a compressor, a heat source-side heat exchanger, an expansion device, and a use-side heat exchanger to each other by connecting pipes, an outside air temperature sensor configured to detect an outside air temperature, and a controller configured to operate the refrigeration cycle apparatus and to switch between a normal operation mode for controlling the refrigerant circuit based on an operation load of the use-side heat exchanger and a refrigerant amount determining mode for determining whether or not an amount of refrigerant in the refrigerant circuit is appropriate. The controller is configured to switch the normal operation mode to the refrigerant amount determining mode when the outside air temperature detected by the outside air temperature sensor is within a set temperature range.