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Vortex compressor

A scroll compressor and scroll technology, applied in the field of scroll compressors, can solve problems such as insufficient compression, increase in indicated power, and decrease in performance, and achieve the effects of improving efficiency, preventing an increase in indicated power, and preventing internal leakage

Inactive Publication Date: 2008-03-26
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this point, compression is only halfway to the necessary pressure, resulting in undercompression
[0012] In addition, under the condition of operating at a higher pressure ratio like when hydrocarbon refrigerant is used in the refrigeration cycle, there will be a problem of performance degradation caused by an increase in the indicated power due to insufficient compression.

Method used

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Experimental program
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Embodiment Construction

[0026] Embodiments of the present invention will be described below according to FIG. 1 to FIG. 6 .

[0027] Fig. 1 shows a longitudinal sectional view of a scroll compressor using an embodiment of the present invention. The scroll compressor 13 has a movable scroll 1 and a fixed scroll 3, a crank shaft 14 that rotates the movable scroll 1, a bracket 15 that supports the crank shaft 14, and an Oldham ring 16 that allows the orbital movement of the movable scroll 1 and prevents rotation. , the motor 17 that drives the crankshaft 14 . The helicoids of the two volutes 1 and 3 have a basic vortex curve which is a reference curve defining the helical shape as an algebraic helical curve. The winding end position of the fixed scroll 3 is extended to the same position as the winding end position of the movable scroll 1 by increasing the deflection angle of the spiral body of the fixed scroll 3 by approximately 180 degrees compared with the deflection angle of the movable scroll 1 As...

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Abstract

The object of the present invention is to provide a scroll compressor, which increases a volume ratio with an outer diameter of spiral bodies remains the same, and has a high efficiency at the time of high pressure ratio operation. The solution of the present invention is that in a turning scroll and fixed scroll having the spiral body constituting a basic volute curve as an algebraic spiral curve, respectively, an inner side wall face of the fixed scroll spiral body is extended to a position exceeding an outer side wall face of the turning scroll spiral body, and the center of the basic volute curve and the center of an end plate are offset. A fluid injection inlet is arranged in a position continuing long to a closed space having a small design volume ratio.

Description

technical field [0001] The present invention relates to a scroll compressor as a type of positive displacement fluid machine, and particularly relates to a scroll used for freezing and refrigeration using a working fluid such as R404A, R507A, R508B, R410A, hydrocarbon, carbon dioxide, ammonia, and other low-temperature refrigerants compressor. Background technique [0002] Since the pressure ratio reaches 4 to 20 in the refrigerating cycle of the refrigerating machine, in the conventional involute scroll whose basic vortex curve is a circle, the volume change rate is constant, so in order to make the volume formed by the scroll The ratio of the volume at the end of the suction of the compression chamber to the volume at the beginning of the discharge (hereinafter referred to as the design volume ratio) corresponds to the necessary pressure ratio, except for increasing the swirl angle of the scroll body and increasing the outer diameter of the scroll body , without other mea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C18/02F04C29/00
Inventor 土屋直洋小山昌喜香曾我部弘胜
Owner HITACHI JOHNSON CONTROLS AIR CONDITIONING INC