Matsushita Electric Industrial Co., Ltd.

Jiro Yuda

Yoshinori Kojima

Shigeru Muramatsu

Shuichi Yamamoto

Osamu Aiba

Sadao Kawahara

Michio Yamamura

Manabu Sakai

Michimasa Hori

Hideo Hirano

Shiro Maeda

Mitsuhiro Ikoma

Hiroshi Morokoshi

Takeshi Aizawa

Scroll compressor having recesses on the scroll wraps

Starting method for scroll-type compressor

A compressor includes a communication hole 42 through which lubrication oil in an oil reservoir 5 is supplied to a back pressure chamber 39 at least through an eccentrically driving bearing 15, and a communication bore 45 or gap through which the lubrication oil in the back pressure chamber 39 is fed into compression spaces, and a constricted resistance member 44 for regulating the oil flow rate is provided on the communication hole 42. The passage resistance can be made larger in comparison with the case where resistance is caused in a small space of a sliding portion of a bearing, and an accurate value of the passage resistance can be preset with the oil flow rate being low, thereby preventing flow of the lubrication oil to the compression operating spaces from increasing in quantity. Thus, there is provided a highly reliable scroll compressor which has a high compression efficiency, consumes power constantly, and has no risk of compression of the lubrication oil in the compression operating spaces.

Scroll compressor with regulated oil flow to the back pressure chamber

Scroll compressor with swirling impeller biased by cooled lubricant

Scroll compressor with axial vibration prevention for a shaft bearing

Scroll compressor with reduced vibration resulting from the Oldham's ring

The compression capacity of a rotary compressor may be changed by a cylinder bypass system. The change of compression capacity is achieved by a slide wall member which composes part of an inside wall of a cylinder containing a compression mechanism and which is movable, thereby bypassing gas being compressed to a suction side of the compressor. The slide wall member is caused to slide forward by gas pressure applied and to slide backward by a spring force. By controlling such gas pressure, the capacity of the compressor may be changed. A relatively large opening is formed in the cylinder when the slide wall member is moved backward, so that the compression capacity can be greatly reduced without a large decrease in efficiency.

Rotary compressor with capacity modulation

A control system for a compressor driven by a pole-changing motor comprises a pole changer for the motor, a contactor for stopping the motor for a predetermined time in case of the pole changing, and a switch responsive to the variation in a physical quantity which occurs in the compressor every time when the latter is stopped, whereby the motor is stopped in case of the pole changing and then is started again in response to the actuation of the switch. This control system is especially adapted for use in a pole-changing-motor-driven compressor used in a refrigeration cycle of an air conditioner.

Control system for pole-changing-motor-driven compressor

Growing community of inventors

Ikoma, Japan

Jiro Yuda