Rotary compressor

A rotary compressor and compressor technology, applied in rotary piston machinery, rotary piston pumps, rotary piston/oscillating piston pump components, etc., can solve problems such as efficiency reduction and noise, and achieve suppression of efficiency reduction. Effect

Inactive Publication Date: 2018-01-23
FUJITSU GENERAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lubricating oil discharged into the lower end plate cover chamber accumulates in the lower end plate cover chamber, and when the lower discharge hole is soaked in the lubricating oil, it becomes the discharge resistance of the refrigerant, causing problems such as lowered efficiency or noise.
The smaller the volume of the lower end plate cover chamber, the more likely this problem will occur

Method used

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  • Rotary compressor
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0113] figure 1 It is a longitudinal sectional view showing the first embodiment of the rotary compressor of the present invention. figure 2 It is an exploded perspective view looking at the compression part of the rotary compressor of 1st Example from above. image 3 It is an exploded perspective view of the rotary shaft and the oil supply vane of the rotary compressor of the first embodiment seen from above.

[0114] Such as figure 1 As shown, the rotary compressor 1 includes: a compression unit 12 disposed at the lower portion of a closed vertical cylindrical compressor housing 10 , disposed above the compressor unit 12 , and drives the compression unit 12 via a rotary shaft 15 . The electric motor 11 and the vertical cylindrical accumulator 25 fixed to the side of the compressor housing 10 are included.

[0115] The liquid reservoir 25 passes through the upper suction pipe 105 and the upper L-shaped pipe 31T of the liquid reservoir and the upper suction chamber 131T of...

no. 2 example

[0145] Image 6 It is a longitudinal sectional view showing a lower discharge valve housing recess in which a lower discharge valve is mounted in the rotary compressor of the second embodiment. Such as Image 6 As shown, in the rotary compressor 1 of the second embodiment, the depth H from the lower discharge chamber recess 163S2 and the lower discharge valve housing recess 164S2 formed in the lower end plate 160S2 to the lower valve seat 191S is 2 It is shallower than the depth H from the lower discharge chamber recess 163S and the lower discharge valve housing recess 164S formed in the lower end plate 160S to the lower valve seat 191S in the rotary compressor 1 of the first embodiment. The lower end plate cover 170S2 has a recess 171S2 at a portion facing the front of the lower discharge valve retainer 201S, and accommodates a portion of the lower discharge valve retainer 201S protruding from the lower discharge chamber recess 163S2. The depth from the recess 171S2 to the ...

no. 3 example

[0148] Figure 7 It is a longitudinal sectional view showing a lower discharge valve housing recess in which the lower discharge valve is mounted in the rotary compressor of the third embodiment. Such as Figure 7 As shown, in the rotary compressor 1 of the third embodiment, a portion of the front portion of the lower discharge valve pressing plate 201S3 that is close to the lower end plate cover 170S is formed thinner than other portions. Thus, while ensuring the same opening degree as the lower discharge valve 200S of the rotary compressor 1 of the first embodiment, the depth H from the lower discharge chamber recess 163S3 and the lower discharge valve housing recess 164S3 to the lower valve seat 191S is ensured. 2 Same shallow as the second embodiment.

[0149] According to the structure of the rotary compressor 1 of the third embodiment described above, the volume of the lower end plate cover chamber 180S3 can be reduced by the volume of the concave portion 171S2 of the ...

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PUM

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Abstract

A rotary compressor is provided which can inhibit backflow of a refrigerant compressed by an upper cylinder in a refrigerant through hole, and can inhibit efficiency reduction of the rotary compressor. In the rotary compressor, a connection surface of a lower end plate and a lower end plate cover is provided with a communication groove communicated with a lower end plate cover chamber. The lower end plate cover is formed in a shape of a flat plate, and has a through hole that is provided to penetrate in the thickness direction of the lower end plate cover and that communicates with the communication groove. When a sectional area of the communication groove which passes through a center line of a rotation shaft, and is on a section along the rotation shaft direction is S1 [mm<2>], an area in which the through hole and the communication groove overlap each other on a plane orthogonal to the rotation shaft is S2[mm<2>], and an excluding capacity of a lower cylinder chamber is V[cc], eachof 0.10<=(S2 / V)<=0.50, and 1.0<=(S2 / S1)<=7.0 is satisfied.

Description

technical field [0001] The present invention relates to a double cylinder type rotary compressor. Background technique [0002] In the double-cylinder type rotary compressor, the high-temperature compressed refrigerant compressed by the lower cylinder and discharged from the lower discharge hole flows from the lower end plate cover chamber (lower muffler chamber) to the upper end plate cover chamber (upper muffler chamber). The refrigerant passage hole is arranged at a position away from the suction chamber side of the lower cylinder and the upper cylinder, thereby suppressing the compressed refrigerant from heating the sucked refrigerant in the suction chamber side of the lower cylinder and the upper cylinder, and improving the compressor efficiency The technique is well known. [0003] In addition, in the two-cylinder type rotary compressor, the high-temperature compressed refrigerant compressed in the lower cylinder and discharged from the lower discharge hole heats the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/356F04C29/00
CPCF04C23/003F04C23/008F04C18/356F04C29/0057F04C29/0085F04C2210/26F04C2230/21F04C2240/30F04C2240/40F04C2240/805
Inventor 片山大辉两角尚哉泉泰幸森下卓古川基信
Owner FUJITSU GENERAL LTD
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