Scroll compressor

A technology of scroll compressors and compression mechanisms, which is applied in the direction of rotary piston machines, rotary piston pumps, mechanical equipment, etc., and can solve problems such as abnormal wear of plate-shaped scroll teeth, refrigerant inflow, and reduced reliability

Active Publication Date: 2016-11-30
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, during the reverse rotation, the flow of the refrigerant from the airtight container to the innermost chamber is blocked by the discharge valve mechanism, so that the refrigerant cannot flow into the innermost chamber from the discharge port.
Therefore, there is a problem that the innermost chamber is in a near-vacuum state, and the fixed scroll and the orbiting scroll operate in a press-contact state, which causes abnormal wear on the plate-shaped scroll teeth, resulting in a decrease in reliability.
[0015] However, when the technique of Patent Document 3 is applied to a scroll compressor employi

Method used

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Embodiment approach 1

[0027] figure 1 It is a schematic sectional view showing the structure of the scroll compressor according to Embodiment 1 of the present invention. exist figure 1 And in each figure mentioned later, the element attached|subjected with the same code|symbol represents the same or a corresponding element, and this is common throughout the specification. In addition, the form of the structural element expressed in the whole specification is an illustration after all, and is not limited to these descriptions. In addition, the level of temperature, pressure, etc. is not specified based on the relationship of absolute values, but is specified relative to the state, operation, etc. in the system, device, etc.

[0028] The scroll compressor 100 has at least the compression mechanism part 10 and the electric motor 20 in the airtight container 100a. The compression mechanism unit 10 and the motor 20 are connected by a main shaft 6 , and the main shaft 6 transmits the rotational force gen

Embodiment approach 2

[0060] In the second embodiment, in the pressure path 2h of the first embodiment, the flow of the refrigerant from the innermost chamber 14c to the boss external space 2g is prevented.

[0061] Figure 5 It is a schematic cross-sectional view showing a main part of a scroll compressor according to Embodiment 2 of the present invention. Hereinafter, the second embodiment will be described focusing on the configuration different from that of the first embodiment.

[0062] In addition to the scroll compressor 100 of the first embodiment, the scroll compressor 100 of the second embodiment further includes a pressure path check valve mechanism 2k in the pressure path 2h. The pressure path check valve mechanism 2k allows the refrigerant gas to flow from the boss outer space 2g toward the innermost chamber 14c, and prevents the reverse flow of the refrigerant gas. Furthermore, the machined hole for arranging the pressure path check valve mechanism 2k is closed by the plug 2l.

[0063

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Abstract

The present invention relates to a scroll compressor. The baseplate part of an oscillating scroll has a pressure channel via which an external space of a boss part and an innermost chamber positioned farthest radially inward among a plurality of compression chambers and communicate. When a motor is rotated backwardly, a refrigerant gas flows from the external space of the boss part via the pressure channel to the innermost chamber so that oil supply via an oil supply channel is performed on the basis of a decrease in pressure of the external space of the boss part.

Description

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Claims

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Application Information

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Owner MITSUBISHI ELECTRIC CORP
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