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Multi-stage compression type rotary compressor and refrigerating circulating device provided with same

A rotary compressor and compression technology, applied in the field of refrigeration cycle devices and multi-stage compression rotary compressors, can solve problems such as increased costs, worrying environmental problems, and increased refrigerant encapsulation, so as to avoid wear failures and ensure reliable operation. , the effect of reducing oil discharge

Inactive Publication Date: 2017-02-08
GUANGDONG MEIZHI COMPRESSOR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase in the amount of sealed oil will increase the amount of oil discharged in the refrigeration cycle, and it will not be easy to obtain effective results
Moreover, the increase in the amount of sealed oil will lead to an increase in the amount of refrigerant sealed, which not only increases the cost, but also makes environmental problems worrying

Method used

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  • Multi-stage compression type rotary compressor and refrigerating circulating device provided with same
  • Multi-stage compression type rotary compressor and refrigerating circulating device provided with same
  • Multi-stage compression type rotary compressor and refrigerating circulating device provided with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] figure 1 The illustrated two-stage compression rotary compressor 1 includes an inverter-type electric motor 4 (hereinafter referred to as motor 4 ) fixed to the inner peripheral wall of a hermetic casing 2 and a compression mechanism 5 driven by a rotor 4 b. The housing 2 is divided into three chambers by the first end plate 20 of the compression mechanism part 5 and the motor 4 , a compression mechanism cavity 2 a , a motor lower cavity 2 b and a motor upper cavity 2 c. The oil sump 8 at the bottom of the compression mechanism chamber 2a has lubricating oil 9 (hereinafter simply referred to as oil 9).

[0052] The low-pressure gas drawn in from the intake pipe 6 is compressed in the first cylinder 10 to become an intermediate-pressure gas, and is discharged to the sealed first muffler 48 . The intermediate-pressure gas is sucked into the second cylinder 15 through the communication hole 43 , becomes high-pressure gas, and is discharged to the second muffler 50 . As w...

Embodiment 2

[0082] Image 6 It is a two-stage compression rotary compressor 1 and a refrigeration cycle diagram connected to the compressor. The low-pressure gas sucked in from the intake pipe 6 is compressed in the first cylinder 10 to become an intermediate-pressure oil-containing refrigerant gas, and is discharged to the first muffler 51 . Next, the intermediate-pressure oil-containing refrigerant gas passes through the through hole 36 of the crankshaft 30 to lubricate the sliding parts, then flows from the shaft end hole 31c to the rotating rotor disc 52, and then diffuses toward the motor coil 4c. In other words, the intermediate-pressure oil-containing refrigerant gas is discharged from the first muffler 51 to the motor upper chamber 2c. Therefore, the internal pressure of the casing 2 corresponds to the pressure of the oil-containing refrigerant gas, and is an intermediate pressure.

[0083] The oil-containing refrigerant gas in the upper chamber 2c of the motor passes through th...

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Abstract

The invention discloses a multi-stage compression type rotary compressor and a refrigerating circulating device provided with the same. An electric motor and a multi-stage compression type compression mechanism part are accommodated in a sealed housing of the multi-stage compression type rotary compressor; the compression mechanism part comprises at least two air cylinders, a crankshaft, a bearing and a lubricating path; each air cylinder is equipped with a compression cavity; an eccentric revolving piston is arranged in each compression cavity; the crankshaft is used for driving all the pistons to rotate; the bearing is in sliding fit with the crankshaft; and oil-containing refrigerant gas discharged from one compression cavity passes through the lubricating path which is arranged along the revolving axis of the crankshaft to at least lubricate a sliding fit gap part between the crankshaft and the bearing. According to the embodiment of the invention, the multi-stage compression type rotary compressor can effectively lubricate the crankshaft to reduce oil discharge amount of the compressor, so that liquid level of the lubricating oil in an oil storage slot is not greatly reduced.

Description

technical field [0001] The invention relates to the field of refrigeration, in particular to a multi-stage compression rotary compressor and a refrigeration cycle device having the same. Background technique [0002] Conventional lubrication of rotary compressors uses a centrifugal oil supply pump utilizing crankshaft rotation. However, the amount of oil supplied varies with changes in the amount of oil in the housing (oil level), the number of revolutions of the crankshaft, and the size of the crankshaft shaft diameter. In particular, for a rotary compressor installed in an air conditioner, in various operating modes such as starting at low outside air temperature, defrosting operation, and changing from high speed to low speed, the oil supply of the compressor decreases, resulting in insufficient oil supply, which becomes a compressor failure. the main reason. [0003] As a countermeasure against this problem, it is common sense to increase the amount of oil sealed to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C23/00F04C29/02F04C18/356F25B1/04
CPCF04C23/00F04C18/3562F04C29/02F25B1/04F25B2500/16
Inventor 小津政雄杨国用王玲
Owner GUANGDONG MEIZHI COMPRESSOR
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