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JP2007239574A |
To solve problem of a conventional compressor installed in a hermetic container maintained in high temperature and high pressure atmosphere in which, though a part of the lubricating oil fed to the compressor can be fed to the expander b...
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JP2007232296A |
To provide a heat pump system with an improved COP by properly maintaining temperatures of a compressor lubricant and an expander lubricant, and by improving retrieving power in an expander. The heat pump system is characterized in that ...
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JP2007224853A |
To provide a freezing cycle device that does not need to control the power of an expander when the device starts operation. The freezing cycle device is provided with a compressor 2, a radiator 3, an expander 1 and an evaporator 4. The e...
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JP2007218460A |
To continuously and optionally vary a ratio of compressor inflow refrigerant density and expander inflow refrigerant density while preventing a temperature of a discharged refrigerant of a compressor from excessively rising in a refriger...
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JP2007212022A |
To provide a refrigerating cycle device for actualizing normal power recovery of an expander while more reliably securing a certain amount of oil in the expander. In a control method for the refrigerating cycle device, a second bypass ci...
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JP2007212024A |
To provide a refrigerating cycle device with an expansion mechanism capable of recovering pressure energy during expansion, having efficient operation with optimum pressure controlled to a high pressure side. The refrigerating cycle devi...
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JP3963940B2 |
The present invention realizes a reliable heat pump apparatus and heat pump apparatus having high recovering efficiency. The heat pump apparatus includes an expander 711 for expanding working fluid, a permanent magnet type synchronizatio...
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JP2007198180A |
To provide a cold system which can assist the drive of a compression mechanism using energy when refrigerant expands, and can arbitrarily adjust the amount of the refrigerant to expand with an expansion mechanism. Since each planetary ge...
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JP3953871B2 |
To provide a refrigeration air conditioner capable of obtaining a desired refrigerant pressure without increasing the power of the entire compressor, and further improving the refrigerating effect. In this refrigeration air conditioner h...
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JP2007192522A |
To provide a refrigerating cycle device having improved reliability and efficiency while preventing an expander from being out of control in a refrigerating cycle. A compressor 21 and the expander 22 are formed with individual rotating s...
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JP3952951B2 |
To drive a freezing device in any operating condition, and to improve COP of the freezing device. Carbon dioxide is filled as a refrigerant in a refrigerant circuit 10 of the freezing device. A first compressor 21 and a second compressor...
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JP2007187422A |
To provide a power recovery expander for a refrigerator capable of increasing refrigerating cycle efficiency by effectively recovering pressure energy in an expansion process of a liquid refrigerant.The power recovery expander 10-4 for t...
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JP2007183078A |
To provide a refrigerating machine and a refrigerating device capable of improving energy efficiency without complicating a compressor.This refrigerating machine 10 has an evaporator 11 exerting refrigerating effect by retrieving heat fr...
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JP2007178072A |
To provide an air conditioner for a vehicle capable of improving refrigerating capacity in idling operation under a high outside air temperature by lowering a radiator outlet-side refrigerant temperature by using a new heat medium, not b...
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JP3943124B2 |
A heat pump application device (500) comprises a compressor (501) for compressing a cooling medium, a motor (505) for operating the compressor (501), a radiator (502) for cooling the cooling medium compressed by the compressor (501), an ...
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JP2007170765A |
To smoothly start a heat pump device by promptly ensuring high and low pressure difference in starting the heat pump device loading a compressor integrated with an expander.This refrigerating cycle device is composed of a compressing por...
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JP3940835B2 |
To realize a diffusing temperature of a high temperature, and a floor temperature of a little low temperature required for comfortable air-conditioning, at excellent energy efficiency. This air conditioner is provided with an outdoor sid...
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JP2007162490A |
To improve the long-term durability of a rolling bearing in a compression expansion turbine system for an air cycle refrigerating cooling system used for a refrigerating warehouse, a low temperature room below zero, air-conditioning, or ...
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JP2007162492A |
To improve the long-term durability of a rolling bearing, to perform stable control by a controller of simple constitution, to obtain stable high speed rotation while keeping an appropriate clearance between respective impellers and to p...
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JP2007162725A |
To provide a motor integrated magnetic bearing device constructed in a stably controllable manner even when high load operates on a motor to simplify the construction of a controller and reduce the length of a spindle to be rotated at a ...
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JP2007162491A |
To improve the long-term durability of a rolling bearing, to perform stable control by a controller of simple constitution and to obtain stable high speed rotation while keeping an appropriate clearance between respective impellers in a ...
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JP2007162728A |
To provide a motor integrated magnetic bearing device stably controllable even when axial overload operates.The motor integrated magnetic bearing device comprises rolling bearings and magnetic bearing combined, the rolling bearings 15, 1...
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JP2007162723A |
To provide a motor integrated magnetic bearing device constructed with combined rolling bearings in a stably controllable manner even when axial overload operates thereon, to simplify the construction of a controller.An electromagnet 17 ...
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JP2007155277A |
To provide a refrigerating cycle capable of obtaining good cooling efficiency even in a condition of a comparatively low thermal load and maintaining an optimal cooling efficiency even when the load fluctuates, in the case a refrigeratin...
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JP2007155155A |
To provide a refrigerating cycle device of high efficiency and high reliability, using an expander.This refrigerating cycle device comprises a refrigerating cycle composed of a compressor 501 compressing a refrigerant, a radiator 502 coo...
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JP2007147179A |
To positively secure a certain amount of oil in an expander by starting an operation of a compressor after the excess oil remaining in the expander is discharged to a specific amount by operating the expander at a low rotational frequenc...
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JP3929067B2 |
A heat pump of the present invention has a compressor and an expander coupled with a common axis of rotation, a first throttling device disposed in a circulation passage of refrigerant, and a second throttling device disposed in a bypass...
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JP2007127316A |
To solve a problem in cooling or refrigeration of a vehicle wherein presently, a system of directly carrying out rotary driving of a semi-hermetic compressor by using one part of output from an output shaft of an engine or the like, or a...
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JP3916170B2 |
The present invention provides a heat pump including: a compressor; a radiator; a first throttling device having a variable opening; an expander; a second throttling device having a variable opening; an evaporator; piping that connects t...
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JP2007113815A |
To secure lubrication of an expander of a refrigerating cycle and to improve reliability and efficiency thereof.A compressor 21 and the expander 22 are fixed to each other, and connected by an oil equalizing tube and a pressure equalizin...
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JP3897681B2 |
To avoid limitation of a constant density ratio to the utmost, and obtain high power recovering effect in a wide operation range by using an expander in accordance with a flow direction of cooling medium. In this method for determining p...
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JP2007071507A |
To provide a sealed type air-refrigerant freezer having a mechanism preventing direct contact of atmospheric air with a refrigerant to be filled in a pipe arrangement in the device, and using dry air, or dry nitrogen as the refrigerant t...
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JP2007057141A |
To efficiently operate a refrigeration cycle apparatus by controlling the high-pressure side refrigerant pressure of the apparatus.The refrigeration cycle apparatus 12 includes a refrigeration cycle 5 where a compressor 1, a heat radiato...
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JP2007057114A |
To provide an air conditioner capable of carrying out power-saving.A bypass path 110 bypassing a discharge side and a suction side of a compressor 21, and a drive unit 120 provided in the middle of the bypass path 110 to rotatively drive...
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JP3888255B2 |
To surely reduce consumption power of a compressor in a vapor compression type refrigerator. The expander 4 and the compressor 1 are connected through a one-way clutch 6.Thereby, the number of rotations of the expander 4 is less than tha...
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JP2007040593A |
To improve economic efficiency by effectively utilizing exhaust heat of a power generation system using a fuel cell and internal combustion engine.This hybrid system S1 is structured by combining a natural refrigerant heat pump system 1 ...
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JP2007024459A |
To prevent abnormal high-speed rotation of an expander caused by occurrence of problems in a control device of the expander of a refrigeration cycle, and to improve reliability of the expander.A rotating portion of the expander 22 is pro...
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JP2007017040A |
To provide an expansion machine capable of enhancing the operation efficiency of a refrigeration cycle device by minimizing reduction of power recovery amount in the expansion machine, and a refrigeration cycle device using this expansio...
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JP3870951B2 |
To provide a refrigerating cycle device and its controlling method, capable of providing high power recovery effect within a broad operation range without reducing an amount of circulating mass flowing through an expansion machine, and r...
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JP2006349298A |
To prevent liquid compression in a compressor by allowing liquid refrigerant in oil separated by an oil separating mechanism to be evaporated and then sucked by the compressor, in a refrigerating cycle device.This refrigerating cycle dev...
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JP2006349297A |
To control an expander inlet point to increase power recovering quantity of an expander in an expander system.This heat pump device has a refrigerant circuit 26 composed of a compressor 1, a radiator 2, a first throttle device 25, the ex...
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JP3863480B2 |
To reduce the constraint that the density ratio is constant as small as possible, and to obtain high power recovering effect in a wide operation range. This refrigeration cycle device uses carbon dioxide as refrigerant and has a compress...
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JP3863555B2 |
To avoid the constraint that the density ratio is constant as much as possible, and to obtain high power recovering effect in a wide operation range. This refrigeration cycle device uses carbon dioxide as a refrigerant and has a compress...
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JP2006527836A |
The expansion machine flowrate of a vapor compression system is regulated to directly control the supercritical pressure in the high pressure component of the transcritical system. The expansion machine is directly linked to a recompress...
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JP2006258331A |
To provide a refrigerating apparatus with a fluid machine having an expander and a compressor connected to each other via a rotating shaft, avoiding pressure rise in a refrigerant circuit during non-steady operation.To the refrigerant ci...
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JP2006250392A |
To sufficiently supply lubricant to an expander and to perform a defrosting operation capable of promoting energy saving in a refrigerating cycle device comprising a compressor and the expander.This refrigerating cycle device 10 comprise...
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JP2006242491A |
To provide a refrigerating cycle device capable of effectively recovering expansion power with a simple constitution and reducing power consumption, in the refrigerating cycle device utilizing an expander.In this refrigerating cycle devi...
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JP2006226590A |
To prevent degradation of evaporation performance by refrigerator oil in an evaporator by surely lubricating an expander and a compressor.A refrigeration cycle is composed by sealing a refrigerant and refrigerator oil in a circuit with t...
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JP2006226589A |
To safely operate an expander even in startup, in a refrigeration cycle device effectively recovering energy generated by expansion of a refrigerant.This refrigeration cycle device is provided with: a refrigeration cycle composed by seal...
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JP3811116B2 |
To provide a refrigerating cycle device with a low cost and a high efficiency, by means of omitting a four-way valve which reverses a flow direction of a refrigerant that flows in an inner heat exchanger and an expander in an operational...
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