Abstract: A communication system includes a first device, second devices, and a communication line providing a serial connection from the first device to the second devices to establish a communication connection. An address setting device of the communication system is configured to set addresses of the second devices. The address setting device includes a communication controller. The communication controller is configured to transmit a transmission signal toward the second devices through the communication line and change at least one of an amplitude or a frequency of the transmission signal, and associate the addresses of the second devices with connection precedence of the second devices to the first device based on a reception signal received through the communication line.

Abstract: An air conditioning unit includes an indoor air conditioner, a power supply line, and a wireless power feeder. The indoor air conditioner conditions air in a target space. The power supply line supplies power to the indoor air conditioner. The wireless power feeder feeds power to a predetermined device disposed in the target space. The wireless power feeder acquires power from the power supply line.

Abstract: An estimation system estimates the arrangement of objects. The estimation system includes an estimation unit. The estimation unit obtains information related to an arrangement pattern of the objects as first information and obtains, from wireless devices respectively connected to the objects, information including response times between the wireless devices as second information to estimate the arrangement of the objects based on the first information and the second information.

Abstract: A voltage detection probe includes an electrode configured to detect a voltage applied to a wire, and a clip portion freely attachable to and detachable from the wire. The clip portion has a fitting concave portion into which the wire is to be fitted, the clip portion being elastically deformable to widen an opening of the fitting concave portion. The clip portion is configured to retain, by an elastic force, the wire fitted through the opening into the fitting concave portion to cause the electrode to be disposed along an outer peripheral surface of the wire.

Abstract: An air conditioning system includes an outdoor unit and an indoor unit connected to the outdoor unit through an air conditioning communication line. The outdoor unit includes: a control unit; a compressor; a fan; a compressor inverter; a fan inverter; a heat exchanger; and valves of various types. The control unit of the outdoor unit has a coupling capacitor and a noise-cutting transformer which are between a communication circuit and the air conditioning communication line.

Abstract: A communication system includes a first device, second devices, and a communication line providing a serial connection from the first device to the second devices to establish a communication connection. An address setting device of the communication system is configured to set addresses of the second devices. The address setting device includes a communication controller. The communication controller is configured to transmit a transmission signal toward the second devices through the communication line and change at least one of an amplitude or a frequency of the transmission signal, and associate the addresses of the second devices with connection precedence of the second devices to the first device based on a reception signal received through the communication line.

Abstract: An equipment installation support system is usable to support setting of a plurality of pieces of equipment intended to be installed in a plurality of buildings. The support system includes a plurality of recording tools, and a server. Each recording tool is assigned to one of the plurality of pieces of equipment and includes a medium having recorded information concerning the assigned one of the plurality of pieces of equipment. The server manages the plurality of pieces of equipment. A specific piece of equipment is intended to be installed in a specific building among the plurality of buildings and has a configuration to adjust a room environment of the specific building. A specific recording tool is assigned second identification information that is assigned to the specific piece of equipment and identifies the specific piece of equipment from pieces of equipment other than the specific piece of equipment.

Abstract: An air conditioning system includes an outdoor unit and an indoor unit connected to the outdoor unit through an air conditioning communication line. The outdoor unit includes: a control unit; a compressor; a fan; a compressor inverter; a fan inverter; a heat exchanger; and valves of various types. The control unit of the outdoor unit has a coupling capacitor and a noise-cutting transformer which are between a communication circuit and the air conditioning communication line.

Abstract: An inverter driver of an air conditioner drives an inverter of an actuator that actuates the air conditioner. The inverter driver includes a drive circuit outputting a drive signal to the inverter, a microcomputer controlling the drive circuit, a first mechanical relay connected to the drive circuit, and an inverter control power supply continually supplying power to the microcomputer. The first mechanical relay is capable of cutting off an inverter drive power supply of the drive circuit or cutting off the drive signal of the drive circuit. The first mechanical relay cuts off the inverter drive power supply of the drive circuit or the drive signal of the drive circuit when an abnormality in the air conditioner has been sensed and stopping the driving of the actuator has been requested.

Abstract: An equipment installation support system is usable to support setting of a plurality of pieces of equipment intended to be installed in a plurality of buildings. The support system includes a plurality of recording tools, and a server. Each recording tool is assigned to one of the plurality of pieces of equipment and includes a medium having recorded information concerning the assigned one of the plurality of pieces of equipment. The server manages the plurality of pieces of equipment. A specific piece of equipment is intended to be installed in a specific building among the plurality of buildings and has a configuration to adjust a room environment of the specific building. A specific recording tool is assigned second identification information that is assigned to the specific piece of equipment and identifies the specific piece of equipment from pieces of equipment other than the specific piece of equipment.

Abstract: A preheater for a compressor that is capable of heating a lubricant oil efficiently with smaller power is provided. A preheater for a compressor includes: a capacitive oil surface sensor that is provided at a compressor used in a refrigerating cycle, and detects an oil surface of a lubricant oil A in the compressor; and a power supply unit that applies high-frequency voltage to the oil surface sensor.

Abstract: An inverter apparatus variably controls an operation frequency of an electric motor provided in a refrigerating device, and includes: a printed wiring board; a power device attached to one surface of the printed wiring board, the power device including a converter circuit and an inverter circuit; a reactor arranged on a side of the one surface of the printed wiring board, at least a part of the reactor being arranged within a plane projection area of the printed wiring board; and a cooler for cooling the power device and the reactor, the cooler being arranged such that the power device and the reactor are interposed between the cooler and the printed wiring board.

Abstract: An inverter device uses an inverter to convert DC voltage supplied from a rectifying component to AC voltage and applies the AC voltage to an inductive load. The inverter device includes a shunt resistor provided on a direct-current link interconnecting the rectifying component and the inverter, a first terminal passing current to the shunt resistor, a second terminal to which the current from the shunt resistor flows, and a printed board having a conductive pattern with first and second conductive pattern components joining the shunt resistor and the first and second terminals, respectively. The first conductive pattern component includes a first central region connecting right and left side ends of the shunt resistor to right and left side ends of the first terminal, and first right and left side protruding regions. A ratio of areas of the first left and right side protruding regions is 0.6 to 1.6.

Abstract: A module-terminal block connection structure includes: a printed wiring board; a terminal block which is disposed on one surface of the printed wiring board and is formed into a three-dimensional shape by a conductive material, the terminal block being fixed to the printed wiring board; a power module which is disposed on the other surface (rear surface) of the printed wiring board and includes an electric circuit and a press-fit type lead pin used as a circuit terminal; and a conductive portion which is electrically connected to the terminal block, includes a hole (through-hole) for press-inserting the lead pin thereinto, and is electrically connected to the power module while the lead pin is press-inserted into the hole.

Abstract: An inverter apparatus variably controls an operation frequency of an electric motor provided in a refrigerating device, and includes: a printed wiring board; a power device attached to one surface of the printed wiring board, the power device including a converter circuit and an inverter circuit; a reactor arranged on a side of the one surface of the printed wiring board, at least a part of the reactor being arranged within a plane projection area of the printed wiring board; and a cooler for cooling the power device and the reactor, the cooler being arranged such that the power device and the reactor are interposed between the cooler and the printed wiring board.

Abstract: An inverter device uses an inverter to convert DC voltage supplied from a rectifying component to AC voltage and applies the AC voltage to an inductive load. The inverter device includes a shunt resistor provided on a direct-current link interconnecting the rectifying component and the inverter, a first terminal passing current to the shunt resistor, a second terminal to which the current from the shunt resistor flows, and a printed board having a conductive pattern with first and second conductive pattern components joining the shunt resistor and the first and second terminals, respectively. The first conductive pattern component includes a first central region connecting right and left side ends of the shunt resistor to right and left side ends of the first terminal, and first right and left side protruding regions. A ratio of areas of the first left and right side protruding regions is 0.6 to 1.6.

Abstract: An inverter driver of an air conditioner drives an inverter of an actuator that actuates the air conditioner. The inverter driver includes a drive circuit outputting a drive signal to the inverter, a microcomputer controlling the drive circuit, a first mechanical relay connected to the drive circuit, and an inverter control power supply continually supplying power to the microcomputer. The first mechanical relay is capable of cutting off an inverter drive power supply of the drive circuit or cutting off the drive signal of the drive circuit. The first mechanical relay cuts off the inverter drive power supply of the drive circuit or the drive signal of the drive circuit when an abnormality in the air conditioner has been sensed and stopping the driving of the actuator has been requested.

Abstract: A module-terminal block connection structure includes: a printed wiring board; a terminal block which is disposed on one surface of the printed wiring board and is formed into a three-dimensional shape by a conductive material, the terminal block being fixed to the printed wiring board; a power module which is disposed on the other surface (rear surface) of the printed wiring board and includes an electric circuit and a press-fit type lead pin used as a circuit terminal; and a conductive portion which is electrically connected to the terminal block, includes a hole (through-hole) for press-inserting the lead pin thereinto, and is electrically connected to the power module while the lead pin is press-inserted into the hole.

Abstract: A preheater for a compressor that is capable of heating a lubricant oil efficiently with smaller power is provided. A preheater for a compressor includes: a capacitive oil surface sensor that is provided at a compressor used in a refrigerating cycle, and detects an oil surface of a lubricant oil A in the compressor; and a power supply unit that applies high-frequency voltage to the oil surface sensor.

Abstract: In a refrigeration apparatus, a main surface of a printed wiring board has a heavy electric region, which is a region in the lower part of the printed wiring board where a heavy electric component group is disposed, and a light electric region, which is a region positioned above the heavy electric region, where a light electric component group is disposed. A refrigerant jacket contacts a power device which is disposed in the heavy electric region. A liquid pipe of the refrigerant pipe includes a portion that extends upwards towards the refrigerant jacket, and a cooling portion contacts the refrigerant jacket.