Mitsubishi Electric Corporation

Nec Corporation

Somar Manufacturing Co., Ltd.

Hideaki Nagata

Masayuki Kakuda

Takeshi Hatomura

Yusuke Shimazu

Keisuke Takayama

Shin Sekiya

Mihoko Shimoji

Toshihide Koda

Fumihiko Ishizono

Naofumi Takenaka

Takashi Okazaki

Shinichi Wakamoto

Tomokazu Matsui

Yuji Takamura

Raito Kawamura

Masahiro Kanda

Toshihide Kouda

Shigeo Sumi

Masaaki Kamikawa

Katsuya Maeda

A scroll compressor includes a slider including a cylindrical portion supported by a rocking bearing provided on an orbiting scroll so that it rotates freely, and a balance weight portion connected to the cylindrical portion. When a direction opposite to an eccentric direction of the orbiting scroll is a counter eccentric direction and a direction of a central axis of the rocking bearing is a Z-axis direction, the balance weight portion includes a main weight portion provided at a position distant from a center of rotation of the slider in the counter eccentric direction, and a counter-weight portion provided at a position spaced away from the orbiting scroll than a position of a center of the rocking bearing in the Z-axis direction and at a position distant from the center of rotation of the slider in the eccentric direction.

Scroll compressor

A posture control unit (contact portion) that controls a posture of a balance weight-equipped slider so that a slider portion of the balance weight-equipped slider maintains the posture parallel to an orbiting bearing is provided at a position corresponding to a central portion in an axial direction of the orbiting bearing between an eccentric direction-side side surface of an eccentric shaft portion of a rotary shaft and an inner wall surface of a slide hole facing the side surface.

Posture control of a balance weight in a scroll compressor

In a refrigeration cycle device, a design volume ratio, obtained by dividing a stroke volume of a sub-compressor by a stroke volume of an expander, is set to be smaller than (DE/DC)&#xd7;(hE&#x2212;hF)/(hB&#x2212;hA). With an operating efficiency being the maximum in an operating range allowed to be set of the refrigeration cycle device, DE is a density of a refrigerant, which has flowed out from a radiator, DC is a density of the refrigerant, which has flowed out from an evaporator, hE is a specific enthalpy of the refrigerant flowing into the expander, hF is a specific enthalpy of the refrigerant, which has flowed out from the expander, hA is a specific enthalpy of the refrigerant sucked by a main compressor, and hB is a specific enthalpy of the refrigerant at an intermediate position of a compression process of the main compressor.

Refrigeration cycle device

A refrigeration cycle apparatus includes a refrigeration cycle formed by a first compressor, a radiator, an expander that expands a refrigerant that has passed through the radiator, and an evaporator. A bypass piping has one end connected to a discharge piping of the expander and the other end connected to a suction piping of the first compressor. A pressure sensor and a temperature sensor detect the suction pressure and suction temperature of the expander as physical quantities of the refrigerant to be sucked into the expander. A bypass valve controls the flow rate of the refrigerant. A control device determines the appropriate discharge pressure of the expander on the basis of the suction pressure and suction temperature of the expander, and opens the bypass valve when the pressure at which the expander discharges the refrigerant is higher than the determined appropriate discharge pressure.

Refrigeration cycle apparatus with an expander to recover power from refrigerant

A refrigeration cycle apparatus achieves efficient operation by constantly recovering power in a wide operating range. The refrigeration cycle apparatus regulates a pressure of a high pressure side by changing either one or both of an opening degree of the intermediate-pressure bypass valve and an opening degree of the pre-expansion valve on the basis of a density ratio that is obtained from an inflow refrigerant density of the expander and an inflow refrigerant density of the sub-compressor in an actual operating state and a design volume ratio that has been expected at the time of design and that is obtained from a stroke volume of the sub-compressor, a stroke volume of the expander, and a ratio of a flow rate of the refrigerant flowing to the sub-compressor.

Refrigeration cycle apparatus and operating method of same

Disclosed is a positive displacement expander equipped with an expansion mechanism in which power is generated using fluid energy produced while a high-pressure fluid, supplied to a plurality of expansion chambers partitioned by an orbiting scroll or a rolling piston, is being expanded and decompressed. The expander includes a communicating pipe that allows each of the expansion chambers to communicate with an expander discharge side and an opening and closing device disposed on the communicating pipe. When supply of the high-pressure fluid is stopped, the opening and closing device is opened by the time when high and low pressures between each of the expansion chambers and the expander discharge side are equalized, thus stopping the orbiting scroll or the rolling piston at a predetermined position so that an expander obtains sufficient driving force when resuming.

Positive displacement expander and refrigeration cycle apparatus including positive displacement expander

A refrigeration cycle apparatus which is capable of performing matching of the volumetric flow rate without performing pre-expansion it obtained. A refrigeration circuit includes a compression unit including a main compressor and a second compressor, a gas cooler, an expansion mechanism, and an evaporator interconnected with pipes, and a sub-compression mechanism driven by power recovered by the expansion mechanism, a suction side of the sub-compression mechanism is connected to a compression process of the compression unit, a discharge side of the sub-compression mechanism is connected to an inlet side of the gas cooler, and flow rate of refrigerant flowing into the sub-compression mechanism is controlled.

Refrigeration cycle apparatus

A scroll fluid machine that suppresses fluctuations in a port aperture area during each revolution of an orbiting scroll. Suction ports for sucking in a working fluid are disposed on a second base plate to have openings in a vicinity of a winding start end portion of a second spiral tooth, and near an inward facing surface of the second spiral tooth at a position separated by an involute angle approximately 90&#xb0; from the winding start end portion of the second spiral tooth. Discharge ports for discharging the working fluid are disposed on a first base plate to have openings in a vicinity of a winding start end portion of a first spiral tooth, and near an inward facing surface of the first spiral tooth at a position separated by an involute angle approximately 90&#xb0; from the winding start end portion of the first spiral tooth.

Scroll fluid machine having multiple discharge ports

A mobile phone includes a pointing device and an activation mark in the vicinity of the display section. When a user moves a pointer on the display section to a position indicating the mark and operates the decision key, a predetermined action is activated. The number of icons that can be displayed on the display section of the mobile phone is limited. Therefore, in order to easily activate a number of actions of the mobile phone, the aforementioned mark is utilized.

Portable terminal device with pointing device

A pen-input unit and a display unit of a mobile terminal apparatus are individually provided so that the display unit can be used only for display, thereby effectively reducing the power consumption of the pen-input unit. The operation panel of the mobile terminal apparatus includes a display unit for displaying a standby screen, a screen displaying the status of call-outgoing/incoming or telephone conversation, a mail-transmission/reception screen, etc. and a pen-input unit having an input panel into which hand-written pen-input is performed and a liquid crystal display unit for displaying a guide display, etc. for input in the input panel. A control unit and ROM start powering the pen-input unit when the display unit enters a display status requesting to perform inputting operation by the pen-input unit, and stop powering the pen-input unit when the display unit enters a display status not requesting to perform an inputting operation by the pen-input unit.

Mobile terminal apparatus, and power control method and storage medium recording program therefor

A mobile telephone (), when being folded, is set in a lock state by an opening/closing detection and lock mechanism (), and then a control circuit () stops supply of an electric power to a fingerprint authentication unit (). In this state, upon detection of an incoming call from an external apparatus, the control circuit () restarts the supply of the electric power to the fingerprint authentication unit (), and when a user is authenticated as a legitimate user by the fingerprint authentication unit (), instructs the opening/closing detection and lock mechanism () to carry out an unlocking operation.

Mobile terminal, method of controlling the same, and computer program of the same

A cellular telephone with a pointing device that facilitates operations for line scrolling and page scrolling, in which the moving speed of a pointer can be controlled with respect to each on-screen display. The pointing device includes a pointer-operating button having a range of sliding movement. The pointer-operating button can be pressed down and slide within the sliding movement range by single finger operation, and is located in the center of the sliding movement range when not being operated. The pointer-operating button returns to the center position when released in sliding operation, and returns to its former condition when released from the pressed state in pressing operation. Besides, the sliding movement range defines a pointer movement frame. A switch to line scrolling mode or page scrolling mode is made by bringing a pointer into contact with the top edge or the bottom edge of the pointer movement frame. The moving speed of the pointer can be controlled with respect to each on-screen display.

Growing community of inventors

Tokyo, Japan

Hideaki Nagata