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Multistage rotary compressor

A rotary compressor and rotary compression technology, which is applied in the direction of rotary piston machinery, rotary piston pump, cleaning machinery, etc., can solve the problems of residual oil and inability to achieve separation, so as to prevent wear, eliminate insufficient lubrication, and maintain compression performance effect

Inactive Publication Date: 2005-09-21
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Also, for the refrigerant gas that returns to the compressor from the refrigerating cycle through the accumulator, although the oil is separated in the accumulator as described above, since the complete separation cannot be achieved, it will be lost in the refrigeration system. A part of oil remains in the refrigerant gas; as described above, this oil-containing refrigerant gas is compressed to a medium pressure in the low-stage side rotary compression unit E, and then discharged into the airtight container A
Although the medium-pressure refrigerant gas discharged into the airtight container A will be blown to the lower end of the electric unit B to separate the oil in the refrigerant gas, the outlet of the above-mentioned passage (not shown) It is not close to the lower end of the electric unit B, so there is a problem that oil separation cannot be performed effectively in a closed container

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0026] first of all, yes figure 1 The first embodiment shown will be described. In this figure, 1 is an airtight container, which is comprised of a substantially cylindrical container 2 and end caps 3 and 4 attached to the opening end of the container 2 . An electric unit 5 and a rotary compression unit 6 are arranged at upper and lower positions inside the airtight container 1 .

[0027] The electric unit 5 is constituted by an annular stator 5a fixed to the inner surface of the container 2, and a rotor 5b rotating inside the stator 5a. The rotor 5b is shaft-mounted on the upper end portion of the rotary shaft 7 . In this motor unit 5 , the rotor 5 b is rotated by supplying electric power to the stator 5 a through the terminal 8 attached to the end cover 3 .

[0028] The terminal 8 is composed of a base plate 8a fixed to the mounting hole of the end cover 3, and a plurality of connection terminals 8b penetrating through the base plate 8a through an electrically insulating...

Embodiment 2

[0044] below, yes figure 2 The second embodiment shown will be described. In this second embodiment, components corresponding to those of the above-mentioned first embodiment are denoted by the same symbols as above.

[0045] exist figure 2 Among them, 1 is an airtight container, which is composed of a substantially cylindrical container 2 and end caps 3 and 4 attached to the opening end of the container 2 . An electric unit 5 and a rotary compression unit 6 are arranged at upper and lower positions inside the airtight container 1 .

[0046] The electric unit 5 is constituted by an annular stator 5a fixed to the inner surface of the container 2, and a rotor 5b rotating inside the stator 5a. The rotor 5b is shaft-mounted on the upper end portion of the rotary shaft 7 . In this motor unit 5 , the rotor 5 b is rotated by supplying electric power to the stator 5 a through the terminal 8 attached to the end cover 3 .

[0047] The terminal 8 is composed of a base plate 8a fix...

Embodiment 3

[0064] below, yes image 3 The third embodiment shown will be described. In this third embodiment, components corresponding to those of the above-mentioned first embodiment or second embodiment (including components that are substantially the same even if their positions are different) are denoted by the same symbols as above.

[0065] exist image 3 Among them, 1 is an airtight container, which is composed of a substantially cylindrical container 2 and end caps 3 and 4 attached to the opening end of the container 2 . An electric unit 5 and a rotary compression unit 6 are arranged at upper and lower positions inside the airtight container 1 .

[0066] The electric unit 5 is constituted by an annular stator 5a fixed to the inner surface of the container 2, and a rotor 5b rotating inside the stator 5a. The rotor 5b is shaft-mounted on the upper end portion of the rotary shaft 7. As shown in FIG. In this motor unit 5 , the rotor 5 b is rotated by supplying electric power to t...

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Abstract

The present invention relates to a multistage rotary compressor, in which, the amount of oil filled in the closed vessel can be increased and the oil separation in the closed vessel can be efficiently made. An electric element 5 and a rotary compressing element 6 are vertically disposed in the closed container 1. A support member 12 is installed on a rotary compressing element 9 and a roughly cup-shaped cover material 16 is fitted to the support member 12. The roughly cup-shaped cover material 16 is formed to be high so that its upper end is positioned at or near the upper end of a bearing part 12a formed on the upper support member 12, and a delivery hole 16b for discharging a refrigerant gas is formed at the upper end face of the cover material 16 near the outer diameter part of the bearing part 12a.

Description

technical field [0001] The invention relates to a multi-stage rotary compressor, in particular to a multi-stage rotary compressor which can increase the amount of oil sealed in a closed container and can efficiently separate the oil in the closed container. Background technique [0002] Conventionally, there is known a multi-stage rotary compressor in which an electric unit and a rotary compression unit driven by the electric unit are arranged in an airtight container. For example, in Figure 4 On the two-stage rotary compressor shown: in the upper part of the airtight container A, an electric unit B composed of a stator and a rotor is provided; the rotor is installed on the upper end part of the rotating shaft C through a shaft; At the lower part, a rotary compression unit G consisting of a low-stage side rotary compression unit E and a high-stage side rotary compression unit F is arranged through a partition plate D; and at the upper and lower positions of the rotary compr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B17/00F04B39/00F04C18/356F04C23/00F04C29/00F04C29/02F04C29/06F04D17/12F04D29/00
CPCF04C18/3564F04C29/028F04C23/008F04C29/0092F01C21/108F04C23/001F04C29/065F04C29/02F04C29/068A47L13/16B32B5/18B32B27/36
Inventor 里和哉
Owner SANYO ELECTRIC CO LTD