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Rotary compressor

A compressor and rotary technology, applied in the direction of rotary piston machines, rotary piston pumps, mechanical equipment, etc., can solve the problems of piston burns, pressure differences, etc., and achieve the goal of improving burn resistance, suppressing performance reduction, and improving COP Effect

Active Publication Date: 2010-06-09
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the CR clearance is small, the surface of the end plate member and the end surface of the piston will contact during operation due to deformation during assembly of the end plate member, cylinder, etc., changes due to pressure difference and thermal expansion during operation, etc. The problem of burns occurring in the end face of the piston

Method used

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no. 1 approach

[0065] Hereinafter, a rotary compressor according to a first embodiment of the present invention will be described with reference to the drawings. figure 1 It is a schematic configuration diagram of the rotary compressor according to the first embodiment of the present invention.

[0066] The rotary compressor 1 compresses moisture-removed refrigerant gas introduced from an accumulator (not shown), and discharges the compressed refrigerant gas from a discharge channel 25 arranged at an upper end thereof. As refrigerant gas can be used e.g. CO 2 Refrigerant etc.

[0067] Such as figure 1 As shown, the rotary compressor 1 includes an airtight casing 10 , and a drive mechanism 20 and a compression mechanism 30 arranged inside the airtight casing 10 . The rotary compressor 1 is a so-called high-pressure dome-type compressor, and a compression mechanism 30 is disposed below the drive mechanism 20 in the airtight casing 10 . In addition, an oil reservoir 40 is arranged at the ...

no. 2 approach

[0088] Next, refer to the following Figure 6 and Figure 7 A rotary compressor according to a second embodiment of the present invention will be described. Figure 6 It is a plan view explaining the structure inside the cylinder of the rotary compressor concerning 2nd Embodiment of this invention. Figure 7 yes Figure 6 Cross-sectional view of line B-B.

[0089] The second embodiment differs from the first embodiment in that the upper end of the oil supply hole is closed and the oil supply hole is connected to the oil reservoir. In addition, in 2nd Embodiment, since other structures are the same as 1st Embodiment, the same code|symbol as 1st Embodiment is attached|subjected and description is abbreviate|omitted.

[0090] Such as Figure 6 As shown, the cylinder 33 has a cylinder chamber B1 inside, and a holding hole 41 and an oil supply hole 142 provided outside the cylinder chamber B1. In this embodiment, the upper end of the oil supply hole 142 is as Figure 7 It is...

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Abstract

The invention provides a rotary compressor capable of improving piston end face burn endurance and increasing COP. The rotary compressor (1) comprises a cylinder (33) disposed between a front sealing head and a rear sealing head; a piston (34) is disposed inside the cylinder chamber (B1) of the cylinder (33); the piston (34) has a ring shaped roller (37); and a blade (38) extended from the outer circumferential surface of the roller (37) in a holding hole (41); the roller (37) and the blade (38) divides the cylinder chamber (B1) into a high pressure chamber and a low pressure chamber; and a concave portion (50) is formed on the upper surface (34a) of the piston (34).

Description

technical field [0001] The present invention relates to a rotary compressor having a piston integrally formed with a roller and vanes. Background technique [0002] A general rotary compressor includes: two end plate members; a cylinder arranged between the two end plate members; and a piston having an annular roller arranged in the cylinder chamber and vanes extending from the outer peripheral surface of the roller. The cylinder has a cylinder chamber and a holding hole provided outside the cylinder chamber. The vane passes through the holding hole and divides the cylinder chamber into a high-pressure chamber and a low-pressure chamber together with the roller. At this time, if the step difference between the cylinder and the piston, that is, the CR gap can be reduced, the COP can be improved without almost leaking the compressed refrigerant (for example, refer to Patent Document 1). However, when the CR clearance is small, the surface of the end plate member and the end s...

Claims

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Application Information

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IPC IPC(8): F04C18/22F04C29/02
Inventor 金山武弘上石田弘毅汤浅健一清水洋平
Owner DAIKIN IND LTD
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