Matsushita Electric Industrial Co., Ltd.

Michio Yamamura

Shuichi Yamamoto

Shigeru Muramatsu

Osamu Aiba

Sadao Kawahara

Manabu Sakai

Yoshinori Kojima

Jiro Yuda

Kiyoshi Sawai

Hiroshi Morokoshi

Masafumi Fukushima

Kunio Iwanami

Shuuichi Yamamoto

Masahiko Makino

Katuharu Fujio

Tatsuhisa Taguchi

Shotaro Ito

Shiro Maeda

A scroll compressor includes a compressor housing made up of a cup-like first casing having a suction port defined therein and a cap-like second casing having a discharge port defined therein. The compressor housing accommodates a stationary scroll member having a stationary end plate and a stationary scroll wrap protruding axially from the stationary end plate, and an orbiting scroll member having an orbiting end plate and an orbiting scroll wrap protruding axially from the orbiting end plate, with the orbiting scroll wrap being in engagement with the stationary scroll wrap to define a plurality of working pockets therebetween. At least one shim is interposed between mating surfaces of the first and second casings to regulate axial gaps between axial end surfaces of the stationary and orbiting scroll wraps and the orbiting and stationary end plates opposed thereto. The stationary end plate is positioned in the proximity of the mating surfaces of the first and second casings so that a low-pressure chamber is defined between the stationary end plate and the first casing, while a high-pressure chamber is defined between the stationary end plate and the second casing. The location of the stationary end plate in the proximity of the mating surfaces of the first and second casings reduces a variation in the axial gaps referred to above.

Scroll compressor having a compressor housing made up of a cup-like

A scroll compressor includes a stationary scroll and an orbiting scroll having respective wrap elements in engagement with each other. Each of the stationary and orbiting wrap elements has a tip seal groove defined therein and having opposing internal and external walls that are formed so as to represent two involute curves having different phases, respectively.

Scroll compressor having optimized tip seal grooves

A scroll compressor includes a stationary scroll and an orbiting scroll having respective wrap elements in engagement with each other. An inner end portion of an internal wall of one of the wrap elements is partially shaped to represent a curve identical to or approximate to an envelope curve which is obtained through circular translation of a circular arc connected with an external wall of the other wrap element. The radius of the circular arc is so chosen as to increase the shortest distance a.sub.x from each of points on the curve to the external wall of the one wrap element towards the inner end of the one wrap element.

Scroll compressor having wrap elements with rigidified inner ends

Scroll compressor having recesses on the scroll wraps

Starting method for scroll-type compressor

The space in a closed container is divided into two parts by a partition wall member, gas jetting holes through which a high pressure gas released from a compression mechanism section is passed are formed in the partition wall member and a gas collision plate is disposed in opposed relation to the gas jetting holes, and therefore, there is provided a compressor of high achievement factor which is capable of preventing the discharge of oil from the compressor to a refrigerating cycle from being increased even if operated at high rotational frequency.

Motor compressor with lubricant separation

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

Compressor having an oil pump ring associated with the orbiting shaft

Scroll compressor with axial vibration prevention for a shaft bearing

Scroll-type compressor with discharge opening above the lubricant

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

The scroll gas compressor of the invention is so constructed that an enclosed container is partitioned by a fixed scroll member into a high pressure chamber and a low pressure chamber for gas-liquid separating intake refrigerant and storing it, the low pressure chamber being disposed at the lower portion and the high pressure chamber at the upper portion of enclosed container, the high pressure chamber disposing therein a drive unit related to a scroll compression mechanism and a lubricating oil sump, and the fixed scroll member serving also as part of the bottom of the lubricating oil sump, thereby providing that is small-sized, wide in an operational speed range, and superior in durability, and that prevents absorption of heat and noise propagation from the low pressure chamber serving as both the gas-liquid separation chamber and the reservoir of fluid, thereby improving the compression efficiency and lowering noise.

Scroll compressor with heat insulating and soundproof cover in bottom

The present invention provides a low-pressure scroll compressor for use in a refrigerating system of an air conditioning apparatus or the like. Lubricating oil is intermittently supplied to a compressor unit in proportional relation to the rotating number of the motor, avoiding an excessive or insufficient supply of a lubricating oil and realizing a proper supply of the lubricating oil even in high-speed rotation of the motor. Thus the compressor is highly reliable. Further, a screening plate is provided in the suction space of a compressor, so that the lubricating oil in the coolant or cooling medium can be effectively separated from the coolant, resulting in enhancement of collecting efficiency of the lubricating oil. Moreover, the screening plate is useful to prevent a hermetic terminal from being cooled by the returning coolant. Otherwise, dew condensation would occur on the hermetic terminal, and leakage or shortcircuiting would be caused, a vital obstacle to the safety of the compressor.

Scroll compressor with intermittent oil supply passage

A scroll compressor for use as a refrigerant compressor in an air conditioner or as an air compressor. An orbiting scroll member of the compressor has a drive shaft integral therewith and received in a bore formed in an eccentric bearing which in turn is received in an elongated hole formed in an end surface of a crankshaft such that the eccentric bearing is slidable in the elongated hole. The elongated hole and the eccentric bearing are so sized that the orbiting scroll wrap and a cooperating stationary scroll wrap do not contact with each other. A constant minimum gap is left between both scroll wraps regardless of any change in the centrifugal force acting on the orbiting scroll member due to a change in the operation speed. In consequence, vibration and noise due to contact between both scroll wraps are remarkably reduced and the efficiency of the compressor is improved appreciably.

Scroll compressor with clearance between scroll wraps

Growing community of inventors

Kusatsu, Japan

Michio Yamamura