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Rotary compressor with double working cylinders

A rotary compressor, double-working technology, applied in the field of rotary compressors

Inactive Publication Date: 2011-11-16
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the sealing length L is small, leakage occurs and the capacity and efficiency of the compressor decrease.

Method used

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  • Rotary compressor with double working cylinders
  • Rotary compressor with double working cylinders
  • Rotary compressor with double working cylinders

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] figure 1 It is a longitudinal sectional view of a double-cylinder rotary compressor showing a first embodiment of the present invention, figure 2 yes figure 1 The assembly process diagram of the compression mechanism of the double-cylinder rotary compressor, image 3 yes figure 1 An enlarged cross-sectional view of the compression mechanism of the dual-cylinder rotary compressor.

[0026] figure 1 The dual-cylinder rotary compressor has a built-in electric element and a compression mechanism connected to the electric element via a crankshaft 5 in the airtight container 1 . The airtight container 1 is composed of a cylindrical body 1A, a lid body 1B, and a bottom body 1C. The cylindrical body 1A is made of iron plate into a cylindrical shape with upper and lower openings. The lid body 1B and the bottom body 1C are fitted to the cylindrical body 1A, and the fitting parts are welded to seal the inside.

[0027] The electric element is composed of a stator 3 fix...

Embodiment 2

[0042] Figure 4 It is a longitudinal sectional view of a double-cylinder rotary compressor showing a second embodiment of the present invention. Using the shape of the sub-bearing side roller 12, the total unbalance amount of the main bearing side eccentric portion 5A of the crankshaft 5 and the main bearing side roller 11 and the total unbalance amount of the sub bearing side eccentric portion 5B of the crankshaft 5 and the sub bearing side roller 12 were calculated. match. The counterweights 4A and 4B of the existing rotor 4 do not need to be changed, and can be used as they are, thereby suppressing an increase in cost due to remanufacturing of the rotor 4 .

Embodiment 3

[0044] Figure 5 It is a longitudinal sectional view of a double-cylinder rotary compressor showing a third embodiment of the present invention. The total unbalance amount of the main bearing side eccentric portion 5A of the crankshaft 5 and the main bearing side roller 11 and the total unbalance amount of the sub bearing side eccentric portion 5B of the crankshaft 5 and the sub bearing side roller 12 are set to be unequal. A balance weight 4B is provided on the lower side of the rotor 4 . It is also possible to set it on the crankshaft 5 at the same position. As in the first embodiment, the sealing length L can be sufficiently ensured to improve the capacity and efficiency of the compressor, and in this embodiment, vibration can also be suppressed. In addition, since there is one counterweight, the cost of the counterweight can be reduced.

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PUM

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Abstract

A double work cylinder rotary compressor is provided. In prior art, it is not able to adequately ensure a sealing length L for sealing a compression chamber determined by inner radial of a separator and an outer diameter of a roller, which sometimes reduces capacity and efficiency of the compressor due to leakage. The invention aims to provide a double work cylinder rotary compressor to ensure adequately the sealing length to improve capacity and efficiency of the compressor. In order to realize the purpose, the double work cylinder rotary compressor of the invention is structured that the outer diameter of an eccentric portion of a supplementary bearing is smaller than that of the eccentric portion of a main bearing. According to the invention, the outer diameter of an eccentric portion of a supplementary bearing is smaller than that of the eccentric portion of a main bearing, the inner diameter of the separator is reduced, which adequately ensures the sealing length L determined by the inner diameter of the separator and outer diameters of the supplementary and main bearings to prevent reduction of capacity and efficiency of the compressor due to leakage.

Description

technical field [0001] The present invention relates to a rotary compressor having two cylinders in a compression mechanism, and more particularly to a double-cylinder rotary compressor suitable for air conditioners and refrigerator applications using HFC refrigerants or natural refrigerants. Background technique [0002] Figure 7 It is a longitudinal sectional view showing a conventional double-cylinder rotary compressor. The double-cylinder rotary compressor has a motor unit and a compression mechanism unit connected to the motor unit by a crankshaft provided with two eccentric parts having a phase difference of 180 degrees in a sealed container. The compression mechanism unit has two compression elements, and two cylinders constituting each compression element are connected via a partition plate. Two compression chambers are formed by the main bearing and sub-bearing supporting the crankshaft, the cylinder, and the partition plate, and the roller fitted to the eccentric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C29/00F04C23/00F04C18/356
CPCF04C18/356F04C23/001F04C23/008F05B2210/14F05B2240/50F25B9/002Y10S417/00
Inventor 田所哲也大岛健一金子正人
Owner HITACHI JOHNSON CONTROLS AIR CONDITIONING INC