Hitachi Appliances, Inc

Takeda Chemical Industries, Inc.

Satoshi Nakamura

Mutsunori Matsunaga

Takeshi Tsuchiya

Masatsugu Chikano

Yuuichi Yanagase

Kenji Tojo

Masaru Ohtahara

Kazuyuki Fujimura

Yuichi Yanagase

Yoshinobu Yosuke

Makoto Aoki

Isamu Tsubono

Junji Oshima

Shigekazu Nozawa

Kazuo Sakurai

Eiji Sato

Masashi Miyake

Hiroyuki Imamura

Shuji Hasegawa

Shuuji Hasegawa

Tatsuo Kuroiwa

Kingo Nakagawa

Syuuji Hasegawa

In a revolution type compressor using a balance weight for balancing a rotating mass, the effect of oil churn reduction is enhanced, and compressor input is reduced. A balance weight fixed to a drive shaft between a rotor of an electric motorand a compression mechanism includes a weight portion in a substantially semicircular column shape for balancing a rotating mass, a cover portion which is substantially semi-cylindrical and has an opening in the vicinity of a top and bottom at an opposite side in a radial direction from the weight portion, and a hollow space surrounded by the weight portion and the cover portion. Further, a space for discharging oil is provided between the balance weight and the rotor. By the structure, reduction in oil churn, and reduction in input of the compressor are realized, and the compressor with less power consumption is obtained.

Revolution type compressor

A scroll compressor is provided in which the amount of lubricant oil supply is appropriately controlled over a low to high rotational frequency range of the scroll compressor. The scroll compressor has an oil supply unit and an oil supply passage. The oil supply unit includes a small hole with a diameter not exceeding a seal ring width of the sealing part and a groove which are formed on the end plate of the boss portion on the back side of the orbiting scroll. As the orbiting scroll orbitally moves, oil in the high pressure hydraulic chamber pools in the small hole to be discharged, across the seal ring, into the back pressure chamber. The oil supply passage communicates between the high pressure hydraulic chamber and the back pressure chamber.

Scroll compressor with oil supply across a sealing part

A scroll compressor is constructed by combining a stationary scroll and an orbiting scroll formed by erecting a scroll-shape wrap upright on a base plate meshing with each other. A scroll member constructing the stationary scroll or the orbiting scroll is constructed of an inner layer memberforming a core metal and an outer layer memberarranged so as to surround the inner layer member and forming an outer layer part, the inner layer member is constructed of a material with higher modulus of elasticity than that of the outer layer member, and separation prevention parts (uneven parts, depressions, or holes) preventing the inner layer member and the outer layer member from separating with each other due to difference in coefficient of thermal expansion thereof are arranged in the inner layer member.

Scroll compressor

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 inner peripheral side of the seal member, another back pressure chamber of low pressure at an outer peripheral side so that the orbiting scroll is pressed against the fixed scroll with the pressures of these back pressure chambers, and a guide ring supporting an end surface of the seal member at a side opposite to the orbiting scroll and including a guide portion guiding an inner peripheral surface of the seal member so that the seal member is brought into close contact with the orbiting scroll back surface by a wave spring through the guide ring.

Scroll compressor including seal member and guide ring

Scroll compressor having guide ring supporting and urging seal member

A scroll back pressure chamber in a scroll compressor is composed of a spacefilled 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 the discharge pressure presses one of scrolls against the other of the scrolls. An injection hole, through which refrigerant in gas state or refrigerant in liquid state is injected into a compression chamber of the scroll compressor, is provided on a fixed scroll, and the gas refrigerant injection or the liquid refrigerant injection is selected and carried out according to an operating pressure ratio.

Scroll compressor and refrigerating apparatus

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 in an end-plate of the orbiting scroll and connects from a compression chamber side opening opened to a compression chamber side and to a back pressure chamber side opening opened to a back pressure chamber side. The compression chamber side opening is opened and closed by an end-plate of the fixed scroll according as the orbiting motion of the orbiting scroll to perform connection and blockage of the back pressure port. The flow resistance of fluid flowing in and out between the back pressure chamber and the compression chamber is reduced and the compression efficiency and reliability are improved.

Scroll fluid machine

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 portion having an opposed plane annularly formed to face the pane of the circling scroll member, is further supported elastically by an elastic support in a state of being energized in a direction of the circling scroll member, has the contact plane of the stopper portion caused to contact the pane in this elastic support state to keep a limit position with the opposed plane facing the pane of the circling scroll member, and goes back elastically to the frame member side when the circling scroll member goes back to the frame member side and the pane is pressed to contact the opposed plane.

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 freeze-thawing tank assembly includes an upright vessel having a hollow defined therein for accommodating therein a quantity of fluid medium to be treated. The vessel is closed at an upper end by a lid and at a lower end by a normally closed discharge valve. A plurality of double-walled structures are accommodated within the hollow of the vessel in equally spaced and parallel relation with each other. Each of the double-walled structures has a fluid passage defined therein for the flow of a heat-exchanging fluid medium and also has a fluid inlet and outlet communicated with the fluid passage. The fluid medium to be treated may be alternately frozen and thawed by passing the heat-exchanging medium through the fluid passages in the double-walled structures.

Freeze-thawing tank assembly

Growing community of inventors

Shizuoka, Japan

Satoshi Nakamura