Double cylinder rotary compressor

A technology of rotary compressor and double cylinder, which is applied in the direction of rotary piston machinery, rotary piston pump, rotary piston type/oscillating piston type pump components, etc. It can solve the problems of sealing deterioration and achieve high reliability and prevent Rotational, high-reliability effects

Inactive Publication Date: 2005-07-27
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the above-mentioned existing double-cylinder hermetic rotary compressor, the eccentric portions 7, 8 of the rotary shaft 3 have a phase difference of 180 degrees from each other. The residual pressure difference between the low-pressure chambers, and since the sealing performance deteriorates when the refrigerating machine oil is in a low-viscosity state diluted by the refrigerant, this pressure difference causes the refrigerant gas and refrigerating machine oil to pass through the space in the sealed container 1 and compress The gap between the chambers 14, 15 flows into the low pressure chambers in the compression chambers 14, 15, thereby counter-rotating the rotating shaft 3

Method used

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Embodiment approach 1

[0022] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig. 1 is a longitudinal sectional view showing a double-cylinder hermetic rotary compressor according to Embodiment 1 of the present invention. and, figure 2 It is a cross-sectional view showing the compression chamber of the twin-cylinder hermetic rotary compressor according to Embodiment 1 of the present invention.

[0023] In the figure, the electric component 2 contained in the upper part of the airtight container 1 rotates the rotary pistons 9, 10 in the upper cylinder 4 and the lower cylinder 5 through the rotating shaft 3, the upper cylinder 4 is the first cylinder, and the lower cylinder 5 is the second cylinder. cylinder. Between the upper cylinder 4 as the 1st cylinder and the lower cylinder 5 as the 2nd cylinder, an intermediate partition 6 is set, and the opening end of the upper cylinder 4 as the 1st cylinder is closed with the main bearing 16 (for the up...

Embodiment approach 2

[0038] Next, a two-cylinder hermetic rotary compressor showing Embodiment 2 of the present invention will be described. image 3 It is a sectional view showing the compressor according to Embodiment 2 of the present invention. in addition, Figure 4 seen from another angle image 3 The longitudinal sectional view of the main part which shows the double-cylinder hermetic rotary compressor concerning Embodiment 2 of this invention is shown in . In the figure, and Embodiment 1 and Fig. 1, figure 2 The same symbols are attached to the same parts, and detailed explanations are omitted.

[0039] In this embodiment, the suction connection pipe 21 is only inserted into any one of the first cylinder or the second cylinder, and is provided in the branch flow channel 6a branching to the other cylinder in the cylinder to guide the refrigerant. One of the cylinders (such as the first cylinder) is provided with a spring 13, and the spring pushes the blade (such as the blade 11) to the ...

Embodiment approach 3

[0049] Next, a double-cylinder hermetic rotary compressor showing a third embodiment of the present invention will be described with reference to the drawings. Figure 5 It is a longitudinal sectional view showing the compressor according to Embodiment 3 of the present invention. In addition, FIG. 6 is a diagram for explaining the operation of the check valve provided on the branch channel, Figure 6a It is a diagram showing the operation of the check valve during normal rotation, Figure 6b It is a diagram showing the operation of the check valve when refrigerant gas and refrigerating machine oil return. In the drawings, the same parts as those in Embodiments 1 and 2 and FIGS. 1-4 are marked with the same symbols, and therefore description thereof will be omitted. In this embodiment, the suction connecting pipe is inserted into only one of the two (first and second) cylinders 4, 5 (for example, the first cylinder 4), and is installed in the cylinder to the other cylinder (for...

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Abstract

The object of the present invention is to provide a compressor and a refrigeration cycle device with a high reliability anti-reverse rotation device, which can prevent the refrigerant gas from moving to the refrigeration system due to the reverse rotation of the compressor immediately after the compressor stops. The return flow in the cycle will not cause insufficient lubrication of the compression structure due to insufficient refrigeration machine oil. The solution is to equip the first vane and the second vane, the first vane is set in the first cylinder to divide the interior of the first cylinder into a high-pressure chamber and a low-pressure chamber, and the second vane is set in the second In the cylinder, the inside of the second cylinder is divided into a high-pressure chamber and a low-pressure chamber. The first vane is provided with a spring that presses the first rotary piston, and the second vane is not provided with a spring that presses the second rotary piston.

Description

technical field [0001] The present invention relates to a double-cylinder hermetic rotary compressor used in refrigerating and air-conditioning systems such as room air conditioners and refrigerators. Background technique [0002] Figure 7 It is a longitudinal sectional view of an existing double-cylinder rotary compressor. In the figure, the rotating shaft 3 is rotated by the electric component 2, and the rotary pistons 9, 10 are respectively eccentrically rotated in the respective compression chambers 14, 15 of the first and second cylinders 4, 5. Thus, the refrigerant gas is sucked into the compression chamber 14 from the suction connection pipe 21a through the accumulator 19 and compressed, and sucked into the compression chamber 15 from the suction connection pipe 21b and compressed, and the refrigerant gas is drawn from the main bearing 16 and The discharge port 23 of the auxiliary bearing 17 discharges into the sealed container 1 and flows into the refrigeration cyc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C23/00F04C18/356F04C29/00
Inventor 茗ケ原将史白藤好范柬理寿史远藤胜巳
Owner MITSUBISHI ELECTRIC CORP
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