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Double-cylinder rotary compressor and air conditioner therewith

A compressor and rotary technology, applied in the field of rotary two-stage compressors and air conditioners using the compressor, can solve problems such as unbalanced load or centrifugal force, and achieve the effect of improving efficiency and improving COP

Inactive Publication Date: 2009-03-25
HITACHI APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, since the rotary two-stage compressor uses the same rotating shaft 2 to drive two compression elements of different shapes, the load or centrifugal force generated by compressing the refrigerant on each compression element is unbalanced, so there is a tendency to make the mechanical friction Ratio (Rr / Rs) and ratio (H / Rs) of loss minimization are different from conventional problems

Method used

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  • Double-cylinder rotary compressor and air conditioner therewith
  • Double-cylinder rotary compressor and air conditioner therewith
  • Double-cylinder rotary compressor and air conditioner therewith

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Embodiment Construction

[0042] An embodiment of the present invention will be described below with reference to the drawings. In order to easily understand this embodiment, in Figure 6 , Figure 7 In, the symbols used on the same structural elements, in Figure 1 to Figure 5 The same notation is also used above.

[0043] figure 1 It is a side sectional view of the compressor 1 of this embodiment. The compressor 1 of this embodiment is suitable for a refrigeration cycle system for an air conditioner in which the working fluid is refrigerant R410A. figure 1 The compressor 1 shown has an airtight container 13 composed of a bottom 21, a cover 12, and a body 22 provided therebetween. On the upper part of the airtight container 13, a motor 14 composed of a rotor 7 and a stator 8 is provided. The rotating shaft 2 connected with the rotor 7 has two eccentric parts 5a, 5b, and is pivotally supported by the main bearing 9 and the auxiliary bearing 19. .

[0044] The main bearing 9 is fixed to the body...

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Abstract

The invention aims to increase the efficiency of a compressor by optimizing the dimensions of compressor parts such as the ratio of displacement (V2 / V1) in the rotary two-stage compressor for an air conditioner using also a refrigerant R410A. Where the ratio of displacement (V2 / V1) on a high-pressure side and a low-pressure side is 0.65 to 0.85, the ratio of cylinder thickness (H2 / H1) is 0.6 to 1.0, the inner radius of a cylinder is Rs, and the outer radius of a roller is Rr, the shape of the cylinder on the high-pressure side is set to 0.8<=(Rr2 / Rs2)<=0.9 and 0.55<=(H2 / Rs2)<=0.95.

Description

technical field [0001] The present invention relates to a technology for improving the efficiency of a refrigerating cycle, particularly a rotary two-stage compressor used in an air conditioner using refrigerant R410A as a working fluid. Background technique [0002] As a conventional two-stage rotary compressor, the structure shown in JP-A-60-128990 (Patent Document 1) is well known. The rotary two-stage compressor shown in this patent document 1 is as follows: Figure 7 , Figure 8 shown. [0003] Figure 7 The shown compressor 101 has an airtight container 13 composed of a bottom 21, a cover 12, and a body 22 provided therebetween. In the upper part of the airtight container 13, a motor 14 composed of a rotor 7 and a stator 8 is provided. [0004] The main bearing 9 is fixed to the body part 22 of the airtight container 13 . The compression element 20 has two high-pressure and low-pressure sides driven by the eccentric motion of the eccentric portions 5a, 5b of the ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C23/00
CPCC02F1/283C02F2103/007C02F2303/02E02B3/16
Inventor 久保田淳金子正人渡部一孝岸康弘津久井和则
Owner HITACHI APPLIANCES INC
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