An air-conditioning device includes a refrigerant circuit including a compressor, a heat source-side heat exchanger, an expansion unit, and an intermediate heat exchanger connected by a refrigerant pipe, through which refrigerant circulates; and a heat medium circuit including a pump, the intermediate heat exchanger, and a load-side heat exchanger connected by a heat medium pipe, through which heat medium circulates. A discharge unit connected downstream of the intermediate heat exchanger in the heat medium circuit discharges fluid flowing through the heat medium pipe, depending on pressure of the fluid. A refrigerant concentration detector detects concentration of the refrigerant contained in the fluid discharged from the discharge unit. A notification device notifies leakage of the refrigerant. A controller activates the notification device depending on the concentration of the refrigerant detected.

Provided is an air conditioning apparatus. The air conditioning apparatus includes an outdoor unit which includes a compressor and an outdoor heat exchanger and through which a refrigerant is circulated, an indoor unit through which water is circulated, a heat exchanger in which the refrigerant and the water are heat-exchanged with each other, a water tube configured to guide the water circulated through the indoor unit and the heat exchanger, a pump installed in the water tube, and a controller configured to analyze an output signal of the pump so as to calculate a ration of an air layer in the water tube, the controller being configured to control a target supercooling degree or target superheating degree of the heat exchanger according to the calculated ratio of the air layer.

Electronic controller comprising: —a power supply (11) connectable to a power supply network (12); —at least one connector (13a, 13b, 13c) adapted to be connected to a load (14a, 14b, 14c) in order to supply it; —a microcontroller (15) connected to the power supply (11) and to the at least one connector (13a, 13b, 13c) in order to apply to the latter a supply voltage in a controlled manner; —at least one detection device (16a, 16b, 16c, 16d) configured to detect a current flow through the connector (13a, 13b, 13c). The microcontroller (15) is connected to the detection device (16a, 16b, 16c, 16d) and is configured to zero the supply voltage if, following application of the supply voltage, the detection device (16a, 16b, 16c, 16d) does not detect a current flow through the connector (13a, 13b, 13c).

A vapor compression system including: a condenser; an evaporator; and an expansion control system on the main flowpath between the condenser and the evaporator, wherein the expansion control system further includes: one or more electronic expansion valves; and a modulated ball valve.

A liquid level detection device that is provided in a vessel and configured to detect a liquid level of fluid stored in the vessel includes a first plate formed in a plate shape, and a second plate formed in a plate shape and disposed to face the first plate. The first plate is disposed in such a manner that a surface opposite to a surface facing the second plate is orthogonal to a flow direction of fluid around the first plate in the vessel.

A climate-control system may include a compressor, a condenser, an evaporator, a first sensor, a second sensor, a third sensor, and a control module. The compressor may include a motor and a compression mechanism. The condenser receives compressed working fluid from the compressor. The evaporator is in fluid communication with the compressor and disposed downstream of the condenser and upstream of the compressor. The first sensor may detect an electrical operating parameter of the motor. The second sensor may detect a discharge temperature of working fluid discharged by the compression mechanism. The third sensor may detect a suction temperature of working fluid between the evaporator and the compression mechanism. The control module is in communication with the first, second and third sensors and may determine whether a refrigerant floodback condition is occurring in the compressor based on data received from the first, second and third sensors.

A refrigerant leak management system for a heating, ventilating, and air conditioning (HVAC) system is disclosed. The system includes a controller communicatively coupled to one or more sensors disposed within the HVAC system. The controller measures a vibration pattern associated with a component of the HVAC system. The controller determines whether the vibration pattern is indicative of a refrigerant leak in the HVAC system. Additionally, the controller can modify operation of the HVAC system when the vibration pattern is indicative of the refrigerant leak in the HVAC system.

An air-conditioning system includes a plurality of indoor units, an outdoor unit, a refrigerant pipe including a branch portion and being divided into a plurality of flow sections, a plurality of control valves, a plurality of pressure sensors, and a controller. The control valves include indoor-unit control valves, and a plurality of pipe control valves. The pipe control valves include a plurality of indoor-side pipe control valves provided between the branch portion and the indoor units. The pressure sensors include a plurality of indoor-side pressure sensors connected to the controller and provided between the indoor-unit control valves and the indoor-side pipe control valves. The controller opens or closes the control valves, compares a pressure of refrigerant to a predetermined threshold, and detects refrigerant leaking in the flow section where a pressure of refrigerant measured is determined to be lower than the predetermined threshold.

A refrigerant detection assembly operable to detect refrigerant mixed with air includes a housing having an internal cavity fluidly connected with an ambient atmosphere surrounding the housing via an opening. A subassembly mounted within the internal cavity includes an air chamber fluidly connected with the internal cavity, a non-dispersive infrared sensor operably coupled to the air chamber, a printed circuit board, and a heat conduction plate mechanically and thermally coupled to the printed circuit board. At least one insulator is arranged within the internal cavity at a position between a portion of the subassembly and the housing. A shell is connectable to the housing in overlapping arrangement with the opening. The shell has at least one shell opening formed therein such that a flow path extends from the shell opening, through the opening formed in the housing to the internal cavity, and into the air chamber.

An intelligent inspection device is disclosed. The intelligent inspection device comprising a sound collection collecting a first operation sound generated in a refrigerator and storing the collected first operating sound a reference sound set-up comparing the first operation sound stored in the sound collection with a preset normal sound of the refrigerator, learning a result of the comparison to set a reference sound, and setting a reference sound range based on the set reference sound and a processor collecting, through the sound collection, a second operation sound generated in the refrigerator after the reference sound range has been set, comparing the second operation sound with the reference sound range, and inspecting whether the refrigerator fails based on the result of the comparison. According to the intelligent inspection device or the artificial intelligent refrigerator of the present disclosure, one or more of a user terminal, and a server of the present disclosure may be associated with an artificial intelligence module, a drone ((Unmanned Aerial Vehicle, UAV), a robot, an AR (Augmented Reality) device, a VR (Virtual Reality) device, a device associated with 5G services, etc.