Assignee: Hitachi Appliances, Inc.

Location: Tokyo, JP
No. of patents: 22

Number	Title	Issue Date
8152502	Scroll compressor having guide ring supporting and urging seal member A scroll compressor includes a fixed scroll, an orbiting scroll, a crankshaft rotationally supported on a frame to drive the orbiting scroll, a seal member between an orbiting scroll back surface and the frame, a back pressure chamber of discharge pressure at an inn...	04/10/2012
7902713	Self-starting type permanent magnet synchronous motor and a compressor using the same A self-starting type permanent magnet synchronous motor comprises a stator and a rotor. The rotor comprises a rotor core having a plurality of slots provided in an outer periphery thereof and a cage winding comprising conductive bars embedded in the slots and conduc...	03/08/2011
7839663	Converter and power converter that becomes it with the converter A converter includes a converter circuit 1 having a plurality of bridge-connected semiconductor switching devices for converting AC power into DC power, a smoothing condenser connected in parallel to the DC side of the converter circuit and a current detector...	11/23/2010
7824160	Scroll compressor and refrigerating apparatus A scroll back pressure chamber in a scroll compressor is composed of a space 111 filled with suction pressure (or intermediate pressure) and a space filled with discharge pressure, and the summation of the suction pressure (or the intermediate pressure) and t...	11/02/2010
7772736	Permanent magnet synchronous motor, rotor of the same, and compressor using the same The inventive self-initiated permanent magnet synchronous motor has a rotor that has two-pole permanent magnets, as well as magnetic substances in a peripheral direction between the magnetic poles of the permanent magnets. The present invention provides a high-effic...	08/10/2010
7770403	Indoor and outdoor unit communication via signal from a power line An air conditioning system is arranged to use a power line for communication. The air conditioning system includes one or more indoor units, one or more outdoor units, and a system controller for controlling the indoor units or outdoor units and executes communicati...	08/10/2010
7758326	Scroll fluid machine A scroll fluid machine comprises compression chambers defined with an orbiting scroll orbiting relative to a fixed scroll, and a back pressure chamber provided on the face opposite from a wrap of the orbiting scroll. A back pressure port is provided, which is formed...	07/20/2010
7628593	Horizontal type scroll compressor including a first space and a second space A horizontal type scroll compressor is provided with a support plate separating an inside of the sealed container into a first space in which the compressor mechanism portion and the electric motor portion are stored, and a second space in which the discharge pipe i...	12/08/2009
7603872	Heat-pump hot water supply apparatus A heat-pump hot water supply apparatus, for dissolving problems of delaying in heating rise-up time when re-starting, and ill influences upon starting characteristics, due to liquid refrigerant residing in an evaporator when the operation is stepped, within a heat-p...	10/20/2009
7557546	Unidirectional DC-DC converter A unidirectional DC-DC converter which has a simple control circuit without using multiple insulated power supplies or a transformer, uses an auxiliary inductor of a comparatively small capacitance, reduces the size and weight of the converter, and has a very great ...	07/07/2009
7531934	Self-start synchronous motor with permanent magnets and at least one frictional agitation joint, method for manufacturing the same and compressor comprising the same In a method of manufacturing a self-start synchronous motor for preventing deterioration of permanent magnets used in a rotor, and also for enhancing the efficiency of the self-start synchronous motor, the self-start synchronous motor comprising a stator having a st...	05/12/2009
7523619	Indoor and outdoor unit communication via signal from a power line An air conditioning system is arranged to use a power line for communication. The air conditioning system includes one or more indoor units, one or more outdoor units, and a system controller for controlling the indoor units or outdoor units and executes communicati...	04/28/2009
7517576	Vacuum insulation panel The invention provides a vacuum insulation panel to which moisture and gas do not easily adsorb while it is being processed or being in storage in an unfinished state. The vacuum insulation panel includes a core provided with air circulation, a getter material which...	04/14/2009
7501734	Motor, compressor, and air conditioner The invention provides a motor comprising a stator and a rotor. The stator core includes a laminated stator core made of laminated stator core plates in which straight cut surfaces are formed on a circular outer peripheral surface of the laminated stator core plates...	03/10/2009
7471525	Converter and power converter that becomes it with the converter A converter includes a converter circuit 1 having a plurality of bridge-connected semiconductor switching devices for converting AC power into DC power, a smoothing condenser connected in parallel to the DC side of the converter circuit and a current detector...	12/30/2008
7453181	Permanent magnet synchronous motor and compressor using the same A permanent magnet synchronous motor includes a rotor having cage windings and permanent magnets placed on an inner peripheral side of these cage winding bars, where the permanent magnets are placed and polarized so that a ratio θ/α between a circumferential pitch...	11/18/2008
7449227	Vacuum insulation panel and refrigerator incorporating the same The invention relates to a vacuum insulation panel which can be used as an insulator for a refrigerator requiring heat insulation to be provided and also to a refrigerator incorporating such a vacuum insulation panel. The invention particularly relates to an arrange...	11/11/2008
7442017	Displacement type compressor having a self-start synchronous motor and start load reducing means In order to make a displacement type compressor be able to reliably start without increasing an outside diameter dimension of the compressor while using a self-start synchronous motor having high energy efficiency, the displacement type compressor according to the i...	10/28/2008
7361396	Vacuum insulating material, refrigerator using vacuum insulating material, vacuum insulating material manufacturing method, and vacuum insulating material manufacturing equipment A vacuum insulating material which minimizes the possibility of absorption of moisture or gas components by its core material during storage in the manufacturing process, improves manufacturing efficiency, and maintains and enhances heat insulation performance. A va...	04/22/2008
7334417	Air conditioner and power line communication system An air conditioner and a power line communication system high in reliability and free of malfunction facilitates the installation work such as the wiring. The air conditioner for conducting communication through a power line includes a bridge unit connected to at le...	02/26/2008
7234646	Heat pump hot-water supply system A hot-water supply system heats water through heat exchange between high-temperature refrigerant of a heat pump circuit and water of a water circulating circuit. The system is an instantaneous water heater unit for instantaneously heating, at a water heat exchanger,...	06/26/2007
7163386	Scroll compressor having a movable auxiliary portion with contact plane of a stopper portion to contact a pane of the fixed scroll through elastic pressure of high pressure fluid A scroll compressor has a movable auxiliary member provided by mounting it between a frame member and a circling scroll member. The movable auxiliary member has a stopper portion for causing a contact plane to contact a pane of a fixed scroll member and a ring porti...	01/16/2007

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Assignee: Hitachi Appliances, Inc.