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High-low pressure dome type compressor

A technology for high and low pressure compressors, applied in the field of high and low pressure dome compressors, which can solve the problems of reducing shaft rigidity, increasing the number of sealing related parts, increasing the number of drive shaft processing, etc., and achieving the effect of improving separation efficiency

Inactive Publication Date: 2004-08-04
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, the shaft rigidity will be reduced, and the running noise will be increased due to the shaft vibration caused by the ejection pulsation.
In addition, the number of processing of the drive shaft increases and the number of seal-related parts increases.

Method used

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  • High-low pressure dome type compressor
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  • High-low pressure dome type compressor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0073] like figure 1 As shown, the high-low pressure dome compressor 1 of this embodiment is connected to a refrigerant circuit that circulates refrigerant gas to perform a refrigeration cycle, although not shown, and compresses refrigerant gas as a working fluid.

[0074] The compressor 1 is provided with a vertically long cylindrical sealed dome-shaped casing 10 . The casing 10 is composed of the following components to form a pressure vessel: a casing body 11, which is a cylindrical body portion with an axis extending in the up-down direction; a bowl-shaped upper wall portion 12, which is welded to its upper end in an airtight manner and joined together. , and has a convex surface protruding above; the bowl-shaped bottom wall portion 13 is hermetically welded at its lower end and joined together, and has a convex surface protruding below; and the inside of the shell 10 is hollow.

[0075] Inside the casing 10 are housed a compression mechanism 15 for compressing refrigeran...

Embodiment approach 2

[0124] Regarding the guide plate 58 provided in the high-low pressure dome-type compressor 1 of the second embodiment, as shown in FIG. 10 , the distribution concave portion 90 is omitted. In addition, here, the same code|symbol is attached|subjected to the same component as Embodiment 1, and the description is abbreviate|omitted.

[0125] Specifically, the guide plate 58 includes a guide body 84 and wing portions 85 arranged at both ends of the guide body 84 . The guide body 84 is provided with a lower curved plate 86 whose cross section is arc-shaped and extends linearly up and down; Formed to protrude toward the inner edge side; and side wall portions 88 are formed upright toward the outer edge side on both end sides of the lower curved plate 86 and the protrusion portion 87 .

[0126] The above-mentioned wing portion 85 is an end portion joined to the outer edge side of the side wall portion 88 of the guide body 84 , and is formed to have an arcuate cross-section and exte...

Embodiment approach

[0132] In each of the above-mentioned embodiments, the compression mechanism 15 is not limited to a scroll type, and may be configured, for example, as a rotary piston type.

[0133] In addition, each of the above-mentioned embodiments may have a configuration in which the noise reduction space 45 of the compression mechanism 15 is omitted.

[0134] In addition, in Embodiment 1 described above, a configuration in which the guide plate 58 is omitted may also be employed. In addition, in Embodiment 1 described above, the driving motor 16 is not limited to being constituted by a DC motor, and may be constituted by, for example, an AC motor.

[0135] In addition, in the above-mentioned second embodiment, the configuration is not limited to the configuration in which the inner end portion 36 of the discharge pipe 20 protrudes further inside than the inner surface of the casing main body 11 .

[0136] In addition, in each of the above-mentioned embodiments, the cross section of the...

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Abstract

Formed in a scroll type compression mechanism (15) is a connection passageway (46) with a discharge opening (49) through which refrigerant compressed by the compression mechanism (15) flows out into a clearance space (18) defined between the compression mechanism (15) and a drive motor (16). A muffler space (45) in communication with the connection passageway (46) for reducing operating noise is formed in the compression mechanism (15). A motor cooling passageway (55) for circulation of working fluid which has flowed out into the clearance space (18) is formed between the drive motor (16) and an inner surface area of a casing (10). A guide plate (58) is disposed in the clearance space (18). Formed in the guide plate (58) is a flow dividing concave portion which causes a part of refrigerant flowing toward the motor cooling passageway (55) to be distributed in a circumferential direction and toward an internal end (36) of a discharge pipe (20) located in the clearance space (18).

Description

technical field [0001] The present invention relates to a high and low pressure dome compressor, in particular to a high and low pressure dome compressor which simplifies the structure of the compression mechanism and improves the cooling efficiency of the driving motor. Background technique [0002] In the past, in the high and low pressure dome compressors, for example, disclosed in JP-A-7-310677, the casing is divided into a high-pressure space and a low-pressure space through a compression mechanism, and in the above-mentioned high-pressure space, a The drive motor connected by the compression mechanism. This type of high and low pressure dome compressor has an internal discharge pipe that guides the working fluid compressed by the compression mechanism to the high pressure space. In addition, a discharge pipe for discharging the refrigerant in the high-pressure space to the outside of the casing is connected to the casing. The outflow end of the above-mentioned intern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B39/06F01C21/10F04B39/00F04B39/12F04C18/02F04C23/00F04C29/00F04C29/02F04C29/04F04C29/06
CPCF04C23/008F04C18/0215F04C29/045F04C29/065F01C21/10F04C29/068F04C18/02
Inventor 北浦洋柳沢雅典松川和彦外山俊之
Owner DAIKIN IND LTD
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