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Rotary compressor

A rotary compressor, piston technology, used in rotary piston machinery, rotary piston pumps, rotary piston/oscillating piston pump components, etc.

Active Publication Date: 2014-08-06
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] However, if only the size of the chamfer on the lower side of the piston 32 is increased, an upward force will be generated due to a pressure difference, so the upper end plate 34 will slide strongly.

Method used

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  • Rotary compressor
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  • Rotary compressor

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0092] figure 1 It is a longitudinal sectional view of the rotary compressor according to Embodiment 1 of the present invention, figure 2 It is an enlarged view of the compression mechanism part. Among them, the use of Figure 15 The components that have already been described are assigned the same symbols to omit repeated explanations.

[0093] On the wall of the eccentric portion 31 a of the crankshaft 31 , an oil supply hole 44 communicating with the oil hole 41 and an oil groove 45 are formed.

[0094] On the other hand, by the eccentric portion 31a of the crankshaft 31, the end plate 34 of the upper bearing 34a and the inner peripheral surface of the piston 32, the upper space 46 in the piston is formed, and the eccentric portion 31a of the crankshaft 31, the end plate 35 of the lower bearing 35a The piston inner lower space 47 is formed with the inner peripheral surface of the piston 32 . The oil in the oil hole 41 from the oil supply hole 42 leaks into the upper sp...

Embodiment approach 2

[0105] Figure 7 It is a sectional view showing the piston of the rotary compressor according to Embodiment 2 of the present invention. The other structures are the same as those in Embodiment 1, and description thereof is omitted.

[0106] like Figure 7As shown, in Embodiment 2 of the present invention, the second area 32b surrounded by the lower inner corner formed on the lower end surface of the piston 32 and the end plate 35 is larger than the upper inner corner formed on the upper end surface of the piston 32 and the end The first area 32a enclosed by the plate 34 .

[0107] Furthermore, in Embodiment 2, the angle D between the lower end surface of the piston 32 and the corner of the lower inner surface is smaller than the angle C between the upper end surface of the piston 32 and the corner of the upper inner surface.

[0108] In this embodiment, the upper end surface and the upper inner surface of the piston 32 are chamfered to form the upper inner corner, and the l...

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Abstract

To solve the conventional problems, according to a rotary compressor of the present invention, a second area surrounded by a lower inner surface angle portion which is formed on a lower end surface of the piston 32 and the end plate 35 which closes the lower end surface of the cylinder 30 is set greater than a first area surrounded by an upper inner surface angle portion which is formed on an upper end surface of the piston 32 and the end plate 34 which closes the upper end surface of the cylinder 30, and an angle formed between the lower end surface of the piston 32 and the lower inner surface angle portion is set smaller than an angle formed between the upper end surface of the piston 32 and the upper inner surface angle portion. According to this configuration, it is possible to reliably retain oil on lower end surface of the piston 32, enhance the reliability, float the piston 32 even if a range of tolerances is increased, and enhance efficiency and productivity of the rotary compressor.

Description

technical field [0001] The present invention relates to a rotary compressor used in an air conditioner, a refrigeration unit, a blower unit, a water heater and the like. Background technique [0002] Conventionally, a rotary compressor that sucks gas refrigerant evaporated by an evaporator and compresses the sucked gas refrigerant is used in an air conditioner or the like. As one of such rotary compressors, a rotary compressor is known (for example, refer to Patent Document 1). [0003] Figure 15 It is a cross-sectional view showing a main part of an example of a rotary compressor. [0004] The electric motor 2 and the compression mechanism 3 connected by the crankshaft 31 are housed in the airtight container 1 . An oil groove 6 is formed at the bottom inside the airtight container 1 . The compression mechanism part 3 has: a cylinder 30 forming a cylindrical inner space; a piston 32 disposed in the inner space of the cylinder 30; an end plate 34 of an upper bearing 34a c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C29/00F04C18/32F04C18/324F04C18/356
CPCF04C2250/30F04C18/30F04C29/028
Inventor 船越大辅杉浦洋先本孝正饭田登
Owner PANASONIC CORP