Daikin Industries, Ltd.

Daikin Kogyo Co., Ltd.

Satoru Fujimoto

Mai Mimura

Kazuma Koyama

Miki Yamanaka

Katsumi Sakitani

Takashi Maekawa

Tetsuro Tajima

Makoto Hiroyasu

Shigeki Hagiwara

Fumikazu Taniguchi

A refrigerant recovery management system includes a display and a computer. The computer executes a data input program to present a screen on the display. The screen is configured for a user to input information regarding refrigerant that has been recovered from refrigerant use equipment and is to be sent to a refrigerant treatment practitioner that conducts a refrigerant treatment on the refrigerant. The computer is configured to: generate request data for sending the refrigerant to the refrigerant treatment practitioner, the request data including information regarding the refrigerant; generate report data regarding the refrigerant treatment for reporting the refrigerant treatment to a manager that manages refrigerant recovery, the report data including information regarding the refrigerant; and determine a conformity between the request data and the report data by determining whether information regarding the refrigerant included in the request data agrees with information regarding the refrigerant included in the report data.

Refrigerant recovery management system

A refrigerant recovery management system includes a first generation unit and a second generation unit. The first generation unit generates first information to send a refrigerant recovered from refrigerant-use equipment to a refrigerant treatment practitioner that conducts refrigerant treatment on the refrigerant. The second generation unit generates second information on the refrigerant treatment, to report the refrigerant treatment to a manager that manages refrigerant recovery.

A rotary compressor for helium gas has a cylinder defining a closed space therein, a rotor disposed in the closed space for eccentric rotary motion while making a sliding contact with the inner peripheral surface of the cylinder, and a blade slidably mounted on the cylinder and resiliently projected into the closed space for sliding contact with the rotor so as to divide the closed space into a suction chamber and a discharge chamber. The compressor further has an oil relief passage which is arranged to allow the discharge chamber to communicate with a space outside the discharge chamber in the final stage of the discharging stroke before the crank angle of the compressor reaches an angle corresponding to the position of a discharge port.

Rotary compressor with oil relief passage

In a rotary compressor provided with a motor to be controlled by an inverter, the power-supply frequency or impressed voltage during one rotation of the induction motor is varied in accordance with the changes in the load torque to make the production torque of the induction motor correspond to the changes in the load torque so as to fundamentally and effectively reduce the oscillations which are caused by the load torque changes.

Oscillation reducing apparatus for rotary compressor

A multi-vane type compressor formed with vane back pressure spaces having introduced thereinto a suction gas pressure in the suction and compression strokes and a discharge gas pressure in the discharge stroke. The compressor includes supply grooves for introducing the discharge gas pressure into the vane back pressure spaces, which are each split into a trailing side portion and a leading side portion. Each leading side portion for coping with the terminating stage of the discharge stroke is exposed to the discharge gas pressure via a passageway offering large resistance to the flow of fluid, to throttle the gas forced out of the vane back pressure spaces as the vanes are forced into vane grooves to thereby raise the vane back pressure. This is conducive to prevention of the jumping action of the vanes, and wear of the tips of the vanes and to minimization of vibration and noise. The compressor is lubricated by a lubricating oil having a fluorine base solid lubricant mixed and dispersed therein, for avoiding friction loss at the tips of the vanes.

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Sakai, Japan

Satoru Fujimoto