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Refrigerating device

A refrigeration device and refrigerant technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., to achieve the effect of ensuring reliability

Active Publication Date: 2010-01-13
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no specific research on how to supply lubricating oil to the expansion mechanism of the expander.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

A first embodiment of the present invention will be described. This embodiment is an air conditioner 10 constituted by a refrigeration device according to the present invention.

[0042] (The overall structure of the air conditioner)

Such as figure 1 As shown, the air conditioner 10 in this embodiment includes a refrigerant circuit 11 . In the refrigerant circuit 11, the compressor 20, the expander 30, the outdoor heat exchanger 14, the indoor heat exchanger 15, the first four-way switching valve 12, and the second four-way switching valve 13 are connected together. The refrigerant circuit 11 is filled with carbon dioxide (CO 2 ) as refrigerant. Further, the refrigerant circuit 11 is provided with an oil supply pipe 41 , an oil return pipe 42 , and a cooling heat exchanger 46 .

[0043] The configuration of the refrigerant circuit 11 will be described. The discharge pipe 26 of the compressor 20 is connected to the first port of the first four-way reversing valve 12 ; the...

no. 2 approach

A second embodiment of the present invention will be described. In this embodiment, the expander casing 34 has the function of a liquid reservoir. Here, differences between the air conditioner 10 in this embodiment and the first embodiment described above will be described.

[0106] Such as Figure 7 As shown, in the refrigerant circuit 11 of the present embodiment, the suction-side piping 16 is composed of the first piping 17 and the second piping 18 .

[0107] One end of the first pipeline 17 is connected to the second port of the first four-way reversing valve 12, the other end of the first pipeline 17 is connected to the expander casing 34, and the port of the other end is located at the expander casing 34. Between the expansion mechanism 31 and the generator 33 in the inner space. The first pipe 17 constitutes a first suction-side passage that communicates the heat exchanger functioning as an evaporator among the indoor heat exchanger 15 and the outdoor heat exchanger 1...

no. 3 approach

A third embodiment of the present invention will be described. The air conditioner 10 in this embodiment is obtained by changing the structure of the expander 30 in the above-mentioned first embodiment. Here, differences between the expander 30 in this embodiment and the first embodiment described above will be described.

[0116] Such as Figure 9 As shown, an eccentric portion 59 is formed on the upper end portion of the output shaft 32 . The diameter of the eccentric portion 59 is formed larger than the diameter of the main shaft portion 38 of the output shaft 32 . An oil supply passage 90 is formed on the output shaft 32 . The oil supply passage 90 extends along the axis of the output shaft 32 . A port at one end of the oil supply passage 90 is located on the upper end surface of the output shaft 32 . The other end of the oil supply passage 90 is bent at right angles and extends radially of the output shaft 32 , and the opening of the other end is located on the outer ...

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PUM

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Abstract

A refrigerant circuit (11) in an air conditioner (10) includes a compressor (20) and an expander (30). In the compressor (20), refrigerant compressed by a compression mechanism (21) is discharged into the internal space of a compressor casing (24). In the compressor (20), refrigeration oil which has accumulated in the bottom of the compressor casing (24) is supplied to the compression mechanism (21). The refrigeration oil in the bottom of the compressor casing (24) is directly introduced into an expansion mechanism (31) of the expander (30) through an oil supply pipe (41).

Description

technical field [0001] The present invention relates to a lubricating oil supply method for supplying lubricating oil to an expander of a refrigeration device including a compressor and an expander. Background technique [0002] Conventionally, a refrigerating device for performing a refrigerating cycle by circulating a refrigerant in a refrigerant circuit has been known. This refrigerating device has a wide range of applications, one of which is for an air conditioner. For example, Patent Document 1 discloses a refrigeration device including a compressor that compresses a refrigerant and an expander for recovering power that expands the refrigerant. Specifically, in this patent document 1 figure 1 In the refrigeration device shown, the expander is connected to the compressor through a shaft, and the power obtained in the expander is used to drive the compressor. Moreover, in this patent document 1 Figure 6 In the refrigeration device shown, a motor is connected to the c...

Claims

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Application Information

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IPC IPC(8): F25B11/02F25B1/00F25B43/00
CPCF25B9/06F04C18/352F25B2313/02742F25B1/04F25B13/00F04C29/028F25B2309/061F25B31/004F04C23/003F25B1/00F25B11/02F25B43/00
Inventor 鉾谷克己冈本昌和熊仓英二
Owner DAIKIN IND LTD
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