Daikin Industries, Ltd.

National Institute of Advanced Industrial Science and Technology

Hiroshi Dohmae

Shin Higashiyama

Shinichi Ishizeki

Sumio Kagimura

Masafumi Hashimoto

Daisuke Satou

Motonobu Ikeda

Masahide Fujiwara

Tomoisa Taniguchi

Hirotaka Doi

Toshiaki Sato

Akio Suzuki

Yuka Miyake

Kentaroh Taoka

Kensuke Urata

Sou Yanagimoto

Jun Fujimoto

Shinichirou Nomura

Kazuhiro Nakayama

System recognition is performed on devices connected to an identical system without recognizing a device of a different system as a device of the identical system in high-frequency communication. In a device network system, an outdoor unit selected from among all outdoor units of a first network performs a recognition process on the outdoor units and indoor units of the first network. In the first network, communication between individual devices including the outdoor units and the indoor units is performed by using a high frequency, and the recognition process performed by the selected outdoor unit uses a recognition signal having a low frequency.

Device network system recognizing devices connected to an identical network system

A power measurement apparatus includes a voltage detector, current detector, and power calculator. The voltage detector contactlessly detects an AC voltage of a conductive path to which power is supplied from an AC power source having a magnitude of AC voltage regulated to be a predetermined value, and outputs a first data signal regarding a voltage waveform of the AC voltage of the conductive path. The current detector contactlessly detects an AC current flowing through the conductive path, and outputs a second data signal regarding a current waveform of the AC current of the conductive path. A power calculator receives the first and second data signals, and calculates active power of the conductive path from a product of a second instantaneous voltage and an instantaneous current of the current waveform indicated by the second data signal. The second instantaneous voltage is generated by converting a first instantaneous voltage.

Power measurement apparatus and power measurement method

A device-registration-work assisting system includes a plurality of notification units, and a mobile terminal carriable by a worker. Each notification unit is built in or disposed near one of a plurality of devices subjected to registration work. The mobile terminal includes a display unit configured to display information regarding each of the devices, and a selection unit configured to select a corresponding one of the devices. The notification unit is configured to notify the worker by light, sound, or motion in response to the corresponding device being selected with the selection unit.

Device-registration-work assisting system

A device-registration-operation assisting apparatus in a device management system including a plurality of devices installed in a building and a management device connected to the devices via a network, assists in an operation to register the devices. The device-registration-operation assisting apparatus includes an emission unit of an electromagnetic wave, and a mobile terminal. The emission unit is integrated into or positioned near one of the plurality of devices. The mobile terminal includes a receiving unit that receives the electromagnetic wave, a display unit that displays information of the device, and an input unit that receives an input of registration information in order to register the device displayed on the display unit in the device management system. The display unit does not display the information of the device for which the registration information is input to the input unit, or changes display of the information.

Device-registration-operation assisting apparatus

In a network in which devices are classified into a plurality of layers, a physical first line is connected to an outdoor unit and a first indoor unit, which are first-layer devices, and a physical second line is connected to a second indoor unit, which is a second-layer device. A first intermediary unit, which is a first intermediary device, includes a first filter always connected to the first line and the second line. The first intermediary unit communicates with the outdoor unit and the second indoor unit via a first signal. The first filter is installed so as not to attenuate a high-frequency first signal used for communication among the outdoor unit, the first indoor unit, the first intermediary unit, and the second indoor unit and so as to attenuate a low-frequency second signal used for communication between the first intermediary unit and the second indoor unit.

Network system

System recognition is performed on devices connected to an identical system without recognizing a device of a different system as a device of the identical system in high-frequency communication. In a device network system, in a state in which a first device group is set in advance as a physically connectable system or in a state in which the first device group is recognized as a physically connectable system, in a case where the first device group or a second device detects occurrence of a state in which the second device outside the system is recognized as belonging to the system, the first device group or the second device causes the second device to leave the system. As a result, a network can be normally maintained even in high-frequency communication.

Network system that facilitates device recognition in a high-frequency communication environment

A refrigerant jacket includes a refrigerant cooling member, a cover member and a strength member. The cooling member is constructed of aluminum or aluminum alloy that thermally contacts a heat emitting electrical part, and has a groove portion. A refrigerant tube of a refrigerant circuit fits into the groove portion. The cover member covers the refrigerant cooling member in a state where the refrigerant tube has been fitted into the groove portion. The strength member is higher in strength than the cooling member, and is fixed to the cooling member. The cover member has a cover-side through hole opposing the strength member. The strength member has a cover member fixing screw hole opposing the cover-side through hole. The cover member is fixed to the strength member by a cover member fixing screw that passes through the cover-side through hole and screws into threads of the cover member fixing screw hole.

Refrigerant jacket and air conditioning apparatus equipped therewith

A voltage smoothing circuit is configured to smooth a voltage outputted from a power supply portion. The voltage smoothing circuit includes first and second smoothing capacitors, a first balancing resistor, and a second conduction regulating portion. The first smoothing capacitor and the second smoothing capacitor are connected in series to each other and are connected in parallel to the power supply portion. The first balancing resistor is connected in parallel to the first smoothing capacitor. The second conduction regulating portion is connected on a current path in parallel with the second smoothing capacitor and conducts current in one direction on the current path in a case where a voltage equal to or greater than a second predetermined voltage has been applied.

Voltage smoothing circuit for smoothing voltage from power supply

A noise filter eliminates noise generated by a noise generating source in an outdoor unit in an air conditioner. Power is supplied from a power source to an indoor unit via the outdoor unit. A choke coil is formed by winding power source lines and indoor/outdoor lines inter unit lines around a common magnetic body. The number of turns of the power source lines and that of the indoor/outdoor lines are preferably set so as to be almost proportional to their impedances. Due to this arrangement, noises of the lines can be cancelled while maintaining balance of influences on the magnetic field of the choke coil.

Noise filter, outdoor unit and air conditioner

The present invention relates to a motor and especially to a technique for maintaining constant power consumption in preheating a compressor motor in an air conditioner. An object thereof is to permit constant preheating of the motor irrespective of variations in receiving voltage. To accomplish this object, switching control of an inverter ( ) that applies a three-phase current to a motor ( ) is performed by a control circuit ( ) in accordance with a duty based on detected values of voltage (Vm) and current (Im). This duty decreases with increasing receiving voltage.

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Osaka, Japan

Hiroshi Dohmae