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Compressor

Inactive Publication Date: 2007-04-12
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011] The present invention purposes to provide a compressor that is highly reliable and does not require any marked high cost in its manufacturing.
[0012] To solve the above-mentioned problem of the prior art, an oil pump of a compressor of the present invention is provided with a helical groove engraved helically on the outer periphery of the above-mentioned shaft and an approximately cup shaped sleeve that is associated loosely to the outer periphery of the above-mentioned shaft. The bottom part of the above-mentioned shaft and bottom face of the above-mentioned sleeve are coupled freely in their rotation, and a rotation suppression means for suppressing the rotation of the above-mentioned sleeve is provided. By the rotation-suppressed sleeve, relative rotation difference with respect to the helical groove is produced. Then, associated with the rotation of the shaft, oil being contacting the inner periphery of the sleeve is dragged due to its viscosity. Thus, the oil is rotated and raised and thereby oil-feeding is accomplished. As a result, an effective viscosity pump can be formed with a small number of parts. Since the bottom part of the shaft and bottom face of the above-mentioned sleeve are coupled freely in their rotation, the relative position of the shaft and the sleeve is restricted, resulting in reducing a chance of occurrence of twisting action between the sleeve and the shaft.
[0013] According to the compressor unit of the present invention, the technical effect is obtained such that a compressor having a high mechanical reliability can be offered.

Problems solved by technology

For such the low rotation rate compressor, by a centrifugal pump such as of prior art that was described in “National publication (in the Japanese) of translation of international patent application 2002-519589”, it became difficult to obtain an ample oil feeding.

Method used

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Examples

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example 1

[0030]FIG. 1 is a cross-sectional drawing of a compressor unit according to Example 1 of the present invention, FIG. 2 is a main part cross-sectional drawing of the main part of according to the same Example 1.

[0031] In FIG. 1 and FIG. 2, a hermetic container 101 stores lubrication oil 102, and at the same time it is charged up with coolant gas 103. Hereupon preferably the coolant gas 103 is R600a, which is hydrocarbon coolant, and the oil 102 is preferably synthetic oil. Also, mineral oil, or polyol ether oil, which are those having compatibility with the above-mentioned coolant gas 103.

[0032] A compressor unit 110 is provided with a block 115 having a cylinder 113, a piston 117 inserted into the cylinder 113 so as to make reciprocating motion therewith, a shaft 125 consisting of a main shaft part 120 supported by a bearing section 116 of the block 115 and an eccentric part 122, and a connecting rod 119 connecting the eccentric section 122 and a piston 117, thereby building a rec...

example 2

[0051]FIG. 3 is a sectional view in the vertical section of a compressor according to Example 2 of the present invention, and FIG. 4 is a sectional view of expanded principal part of the lower part according to the same example

[0052] Hereinafter, referring to FIG. 3 and FIG. 4, explanation is given on the example of the present invention. For those parts of the same or considerably the same composition with those of Example 1, identical numerals are given and detailed explanation is omitted.

[0053] In the sleeve 246 that is installed to the lower end of the main shaft part 120 of the shaft 125 constituting a compressor unit 210, an oil pump 240 that is immersed in the oil 102 is formed.

[0054] In the following, detailed explanation is given on the configuration of an oil pump 240.

[0055] On the periphery of the lower part of the main shaft part 120, a lower part helical groove 142 is provided. It is similar to the Example 1 shown in FIG. 2. A vertical hole 144 is provided inside th...

example 3

[0068]FIG. 5 is a vertical cross-sectional drawing of a compressor cut along the vertical section according to Example 3 of the present invention, and FIG. 6 is an expanded cross-sectional drawing of lower main part of the compressor according to the same example mode of the present invention

[0069] In the following, referring to FIG. 5 and FIG. 6, explanation is given on the present example. For those parts of the same or considerably the same composition with those of Example 1, identical numerals are given and detailed explanation is omitted.

[0070] In the sleeve 346 that is installed to the lower end of the main shaft part 120 of the shaft 125 constituting a compressor unit 210, an oil pump 240 immersed in the oil 102 is formed.

[0071] In the following, detailed explanation is given on the composition of an oil pump 240. On the periphery of the lower part of the main shaft part 120, a lower part helical groove 142 is provided. It is similar to the Example 1 which is shown in FIG...

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Abstract

An oil pump is provided with helical grooves 142 and 142′ carved on the outer periphery of the shaft 125, with an approximately cup-shaped sleeve 146 loosely fit to the outer periphery of the shaft such that the bottom part of the shaft and the bottom plate of the above-mentioned sleeve are engaged in relatively rotatable manner, and with a rotation suppression means for suppressing the rotation of the sleeve. Thereby, even at the low rotation rate operation, oil is raised reliably to compressor unit, offering a highly reliable compressor operation.

Description

TECHNICAL FIELD [0001] The present invention relates to a compressor having an improved oil feeding means. BACKGROUND ART [0002] In recent years, responding to the requirement for global environment, energy saving movement in home use refrigerator is accelerated. Therefore, coolant compressor is made to be an inverter type, and greater efforts are given on lowering the rotation rate further. For such the low rotation rate compressor, by a centrifugal pump such as of prior art that was described in “National publication (in the Japanese) of translation of international patent application 2002-519589”, it became difficult to obtain an ample oil feeding. [0003] As for a compressor of prior art, in place of a conventional centrifugal pump, there is the one that is provided with a viscous pump by which a stable pumping capability is obtainable with less effort. [0004] In the following, referring to drawings, explanation is given on the above-mentioned compressor of prior art. [0005]FIG. ...

Claims

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Application Information

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IPC IPC(8): F04B35/04F04B39/02
CPCF04B39/0246F04B39/0261F04B39/02F04B39/00
Inventor NISHIHARA, HIDETOSHI
Owner PANASONIC CORP