Abstract: A refrigeration cycle apparatus according to the present invention, a controller is configured to cause a first operation mode and a second operation mode to be executed as operation modes of an air-sending fan. The first operation mode is an operation mode in which an operation of the air-sending fan is started based on a first manipulation performed on an operation unit and the air-sending fan is stopped based on a second manipulation performed on the operation unit. The second operation mode is an operation mode in which the operation of the air-sending fan is started when refrigerant is detected by a refrigerant detection unit, the air-sending fan is not stopped based on the second manipulation, the air-sending fan is stopped based on a third manipulation different from the second manipulation, and the operation of the air-sending fan is restarted based on a fourth manipulation different from the first manipulation.

Abstract: A refrigeration cycle apparatus includes a refrigeration cycle circuit which includes a plurality of load-side heat exchangers; a plurality of indoor units which accommodate the plurality of load-side heat exchangers, respectively; and a controller which controls the plurality of indoor units. Each of the plurality of indoor units includes an air-sending fan. At least one of the plurality of indoor units includes a refrigerant detection unit. The controller divides the plurality of indoor units into one or more groups. The controller is set such that when refrigerant is detected by the refrigerant detection unit included in any of the plurality of indoor units, the controller causes the air-sending fans included in all the indoor units which belong to a same group as the indoor unit which includes the refrigerant detection unit which detects the refrigerant to be operated.

Abstract: A refrigeration cycle apparatus includes a refrigeration cycle circuit that includes a plurality of load-side heat exchangers and a plurality of indoor units that accommodate the plurality of load-side heat exchangers. Each of the plurality of indoor units includes an air-sending fan. At least one of the plurality of indoor units includes a refrigerant detection unit. When refrigerant is detected by the refrigerant detection unit included in any one of the plurality of indoor units, the air-sending fans included in all of the plurality of indoor units operate.

Abstract: A refrigeration cycle apparatus includes a refrigerant circuit through which refrigerant is circulated, a heat exchanger unit that accommodates a heat exchanger of the refrigerant circuit and a fan, a temperature sensor disposed in an area of the refrigerant circuit adjacent to a brazed connection or in an area of the refrigerant circuit adjacent to a joint between refrigerant pipes, and a controller configured to determine the presence of refrigerant leakage based on a temperature detected by the temperature sensor. The temperature sensor is covered by a heat insulation material together with the brazed connection or the joint. The controller activates the fan upon determining that refrigerant leakage is present, and is triggered to deactivate the fan in response to the time variation of the temperature detected by the temperature sensor becoming positive.

Abstract: In an air-conditioning apparatus, even if gas other than refrigerant flows into an indoor unit of the air-conditioning apparatus through an air inlet of the indoor unit, a sensor does not make erroneous detection, and if refrigerant leakage occurs, the sensor reliably detect the refrigerant leakage. The air-conditioning apparatus uses refrigerant having a higher density than that of air, and includes a housing, an air inlet provided in a front surface of the housing to allow air in a room to flow into the housing, a heat exchanger that transfers heat between the refrigerant and the air that flows into the housing through the air inlet, an air outlet that allows the air subjected to heat exchange at the heat exchanger to be blown from the housing, a fan provided in an air passage extending from the air inlet to the air outlet, and a sensor that detects leakage of the refrigerant. The heat exchanger is provided above the fan, and the sensor is provided below the fan.

Abstract: An indoor unit of an air-conditioning apparatus includes: a casing; a drain pan, which is provided inside the casing, and is configured to receive condensate water generated in the load-side heat exchanger; and a refrigerant detection unit provided below the drain pan inside the casing. The refrigerant detection unit includes: a sensor configured to detect leakage of the refrigerant; and a sensor cover configured to cover the sensor from a front surface side of the sensor. The sensor cover includes: a roof portion arranged above the sensor; and a side surface portion arranged on the front surface side or a side surface side of the sensor below the roof portion. The roof portion has an eaves portion projecting outward with respect to the side surface portion, and the side surface portion has at least one first opening port configured to introduce air to an inside of the sensor cover therethrough.

Abstract: A fan according to the invention is a fan including a motor, a rotating shaft for transmitting rotation of the motor, and a boss part through which the rotating shaft is inserted at a rotation center. A distal end portion of the rotating shaft protrudes from the boss part, the distal end portion is inserted through a center hole of a washer, and is screwed with a fastening part, and the washer includes a washer bearing surface portion that is fastened by being sandwiched between the fastening part and an end surface of the boss part, and a washer outer peripheral portion surrounding an outer periphery of the washer bearing surface portion. The washer bearing surface portion and the washer outer peripheral portion are integrated with each other.

Abstract: An indoor unit includes a casing having an air inlet and four air outlets arranged in a lower surface portion such that the four air outlets surround four sides of the air inlet, and direction members adjusting a lateral angle of air blown through the air outlets. When the direction member of the first air outlet is in a state for blowing the air toward the second air outlet, the direction member of the second air outlet is in a state for blowing the air toward the first air outlet, the direction member of the third air outlet is in a state for blowing the air toward the fourth air outlet, and the direction member of the fourth air outlet is in a state for blowing the air toward the third air outlet.

Abstract: An air-conditioning apparatus includes a housing having an air inlet and an air outlet, a fan disposed in the housing, and a bell mouth through which a fluid flowing from the air inlet to the air outlet passes in association with rotation of the fan. The bell mouth includes curved part having a curved sectional shape in a fluid flow direction and a vibration-damping element disposed on at least one of a front surface and a rear surface of the curved part. The vibration-damping element is disposed at a position corresponding to a node of vibration of the bell mouth.

Abstract: A refrigeration cycle device includes a refrigerant circuit configured to cause refrigerant to circulate, a heat exchanger unit that houses a heat exchanger of the refrigerant circuit, and a controller configured to control the heat exchanger unit. The heat exchanger unit is provided with an air-sending fan and a refrigerant detector. The controller is configured to cause the air-sending fan to run, and is configured to disregard a detection signal from the refrigerant detector when a rotational speed of the air-sending fan is equal to or greater than a first threshold value, even if the controller detects a leakage of refrigerant on the basis of the detection signal from the refrigerant detector.

Abstract: An air-conditioning apparatus includes a refrigerant circuit in which refrigerant is circulated, and an indoor unit configured to accommodate a load-side heat exchanger of the refrigerant circuit. The indoor unit includes an air outlet provided in the housing, an air inlet provided in the housing below the air outlet, an air passage that extends between the air inlet and the air outlet via the load-side heat exchanger, a refrigerant detection unit disposed below the air inlet, and a first partition plate configured to separate the air passage from a space in which the refrigerant detection unit is installed.

Abstract: Body air outlets 10d of an air-conditioning-apparatus indoor unit 100 each has a substantially trapezoidal shape in plan view and are each defined by a body-air-outlet outer side wall 10d2, a body-air-outlet inner side wall 10d4, and a pair of body-air-outlet end walls 10d1. The body-air-outlet outer side wall 10d2 is provided with a deflection guide 2 at each of long-side ends thereof. The body-air-outlet end walls 10d1 are each provided with a sloping guide 3. The deflection guide 2 has a deflection-guide upper surface 2a that gradually projects toward the body-air-outlet inner side wall 10d4 in a direction toward a body open face 10e (toward a downstream side) and in a direction toward the central part of the body air outlet 10d. The sloping guide 3 has a sloping-guide upper surface 3a that gradually projects toward the central part of the body air outlet 10d as the sloping guide 3 extends closer to the body open face 10e (toward the downstream side).

Abstract: A refrigeration cycle apparatus includes a refrigerant circuit configured to circulate refrigerant, a heat exchanger unit accommodating a heat exchanger of the refrigerant circuit, and a controller configured to control the heat exchanger unit. The heat exchanger unit includes an air-sending fan, an electric refrigerant detection unit, and a notifier configured to output notification of an abnormality.

Abstract: A fan according to the present invention includes: a main plate fixed to a rotation axis of a driving device; a shroud including an air inlet; and an impeller including n blades between the main plate and the shroud, tip ends of leading edges of the respective blades arranged along a circle around the rotation axis, wherein all of the attachment pitch angles ? are different angles, and the blades are arranged so that, in the attachment pitch angles ?, attachment pitch angles on both sides of an attachment pitch angle ?m are a combination of other than an attachment pitch angle ?m?1, which is the next smallest angle in order of magnitude of angle to the attachment pitch angle ?m, and an attachment pitch angle ?m+1, which is the next largest angle in order of magnitude of angle, to the attachment pitch angle ?m.

Abstract: An air-conditioning apparatus includes a refrigerant circuit, an indoor fan, a temperature sensor provided in an area adjacent to a seam in a refrigerant pipe of the refrigerant circuit, and a controller configured to determine the presence of refrigerant leakage on the basis of a decrease in the temperature measured by the temperature sensor. The controller is configured to determine the presence of refrigerant leakage while the indoor fan is stopped, and stop the determination of the presence of refrigerant leakage while a defrosting operation is performed.

Abstract: Provided is a refrigeration cycle apparatus, in which, when refrigerant is detected by a refrigerant detector, an informing unit informs of occurrence of leakage of the refrigerant and countermeasure information for enabling determination of a procedure of coping with the refrigerant leakage.

Abstract: An indoor unit for an air-conditioning apparatus and an air-conditioning apparatus that include levers of a decorative panel operated through insertion hole portions, and then move vertically in the insertion hole portions by the gravity, to thereby be temporarily hung on the hooks. The levers are kept holed on hooks. The indoor unit for an air-conditioning apparatus includes a casing, a decorative panel mounted on a lower surface side of the casing and having an air inlet formed therein, the levers mounted so as to be opposed to each other on opposed two sides among four sides forming edges of the air inlet of the decorative panel, and the hooks mounted at an opening portion of the casing, to allow the levers to be hooked thereon, respectively.

Abstract: Provided is a refrigeration cycle apparatus, including: a refrigerant circuit configured to circulate refrigerant having a flammability; an indoor unit including a casing configured to accommodate a load-side heat exchanger of the refrigerant circuit; and a controller configured to control the indoor unit, wherein the indoor unit includes a refrigerant detection unit and an air-sending fan, wherein the controller is configured to control the air-sending fan to operate at an airflow rate Q [m3/h] when the refrigerant is detected, and wherein, when a lower flammability limit of the refrigerant is LFL [kg/m3] and an assumed leaking speed of the refrigerant is W [kg/h], the airflow rate Q, the lower flammability limit LFL, and the assumed leaking speed W are set to satisfy a relationship of Q>W/LFL.

Abstract: An air conditioner has a casing and a wind direction changing device. The casing has an air inlet, an air outlet, an outer air path wall, and an inner air path wall. The wind direction changing device has an up-down rotation shaft and a deflector. The deflector extends from the up-down rotation shaft toward the outer air path wall. The deflector has an outer air path wall-side end which faces the outer air path wall and has a first arc shape.

Abstract: A refrigeration cycle apparatus according to the present invention, a controller is configured to cause a first operation mode and a second operation mode to be executed as operation modes of an air-sending fan. The first operation mode is an operation mode in which an operation of the air-sending fan is started based on a first manipulation performed on an operation unit and the air-sending fan is stopped based on a second manipulation performed on the operation unit. The second operation mode is an operation mode in which the operation of the air-sending fan is started when refrigerant is detected by a refrigerant detection unit, the air-sending fan is not stopped based on the second manipulation, the air-sending fan is stopped based on a third manipulation different from the second manipulation, and the operation of the air-sending fan is restarted based on a fourth manipulation different from the first manipulation.