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Two cylinder rotation type hermetic compressor and its manufacturing method

A rotary and hermetic technology, applied in the direction of pump combination, machine/engine, mechanical equipment, etc. for elastic fluid rotary piston type/oscillating piston type, which can solve the problems of reduced compression power, increased leakage loss or sliding loss, etc. , to achieve high compression power, reduce distortion, and reduce leakage loss

Active Publication Date: 2009-12-09
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The compression mechanism part of the conventional two-cylinder rotary hermetic compressor has the following problems, that is, the internal diameter grinding part or the plane grinding part of the cylinder, which is distorted and deformed when the upper and lower cylinders are connected, is caused by increased leakage loss or sliding loss. resulting in reduced compression power
[0008] In addition, as described in Patent Document 1, in order to connect the upper and lower cylinders and the intermediate partition plate, in the case of using a method of connecting each cylinder and the intermediate partition plate with special bolts on the outside of the bearing, there are problems caused by the large number of bolts. price issues

Method used

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  • Two cylinder rotation type hermetic compressor and its manufacturing method
  • Two cylinder rotation type hermetic compressor and its manufacturing method
  • Two cylinder rotation type hermetic compressor and its manufacturing method

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no. 1 approach

[0031] Figure 1 to Figure 15 is a diagram showing the first embodiment, figure 1 is a longitudinal sectional view showing a two-cylinder rotary hermetic compressor 1000; figure 2 It is an exploded perspective view showing the compression mechanism unit 30 of the two-cylinder rotary hermetic compressor 1000; image 3 It is a top view showing that the upper bearing 9 is fixed on the upper cylinder 5 with the upper bearing connecting bolt 13; Figure 4 yes means image 3 A-A line sectional view of ; Figure 5 It is a plan view showing that the lower bearing 10 is fixed on the lower cylinder 6 with the lower bearing connecting bolt 14; Figure 6 yes means Figure 5 B-B line sectional view of ; Figure 7 It is a cross-sectional view showing that the upper cylinder 5 is assembled, and the lower cylinder 6 and the lower bearing 10 are in an unassembled state of the compression mechanism; Figure 8 It is a plan view showing the state before the lower cylinder 6 and the lower ...

no. 2 approach

[0053] Figure 16 It is a figure which shows 2nd Embodiment, and is a longitudinal cross-sectional view of the two-cylinder rotary type hermetic compressor 2000.

[0054] Such as Figure 16 As shown, in the two-cylinder rotary hermetic compressor 2000 of this embodiment, one suction connecting pipe 19 is connected from the accumulator 18 to the suction port of the upper cylinder 5 or the lower cylinder 6 . Figure 16 An example is that the suction connection pipe 19 is connected to the suction port of the upper cylinder 5 .

[0055] The assembly procedure of the compression mechanism unit 30 is the same as that of the first embodiment. When assembling the two-cylinder rotary hermetic compressor 2000, insert the compression mechanism part 30 and the electric element 2 into the airtight container 1, then insert the outer tube 20 into the suction port of the upper cylinder 5, and press the inner tube 21 into it. . Afterwards, the suction connection pipe 19 from the reservoir ...

no. 3 approach

[0064] Figure 17 , Figure 18 It is a figure of 3rd Embodiment, It is a cross-sectional view of the main part of the compression mechanism part 30.

[0065] As shown in the first embodiment and the second embodiment, since the compression mechanism part 30 is connected by each bolt, the inner diameter grinding part or the plane grinding part of the upper cylinder 5 and the lower cylinder 6 is distorted and deformed, thereby reducing the roundness, Therefore, leakage loss or sliding loss may increase.

[0066] Therefore, in order to reduce distortion of the inner diameter grinding portion, release portions (escape portions) are provided on the end faces of the threaded portion 5a and the threaded portion 6a, which are provided in the first embodiment and the second embodiment. On the upper cylinder of the two-cylinder rotary hermetic compressor, the threaded part 6a is arranged on the lower cylinder.

[0067] Such as Figure 17 As shown, once the upper cylinder 5 and the u...

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Abstract

The two cylinder type hermetic compressor comprises: a sealed container; an electric operated element received in an upper part of the sealed container; the compression mechanism unit which is received in a lower part of the sealed container, has an upper bearing, an upper cylinder, an intermediate partition plate, a lower cylinder and a lower bearing and is driven by the electric operated element via a crankshaft; an upper through-bolt fixing the upper bearing, the upper cylinder and the intermediate partition plate to the lower cylinder in a screwing manner from an upper bearing side; and a lower through-bolt fixing the lower bearing, the lower cylinder and the intermediate partition plate to the upper cylinder in a screwing manner from a lower bearing side. The compressor is characterized in that at least two upper through-bolts and at least two lower through-bolts are alternately arranged in a circumferential direction which is a rotation direction of the crankshaft.

Description

[0001] This application is a branch of the application of Mitsubishi Electric Co., Ltd. on June 19, 2006 with the title of "Twin-cylinder Rotary Hermetic Compressor and Manufacturing Method for Two-cylinder Rotary Hermetic Compressor" and application number 200610093791.2. case application. technical field [0002] The present invention relates to a two-cylinder rotary hermetic compressor for compressing refrigerant gas used in a refrigerating and air-conditioning apparatus such as an air conditioner or a refrigerator, and particularly relates to a method for connecting compression mechanism parts. Background technique [0003] The connection structure of the compression mechanism in the existing double-cylinder rotary hermetic compressor does not use bolts for connecting the cylinder and the bearing, but adopts the following connection method, that is, in order to connect the upper cylinder, the lower cylinder and the middle partition , On the outer side of the bearing, eac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C23/00
Inventor 茗ケ原将史白藤好范柬理寿史中村尚裕
Owner MITSUBISHI ELECTRIC CORP
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