Rotary compressor and refrigerating circulating system with same

A technology of rotary compressors and compression chambers, applied in the direction of rotary piston machines, compressors, rotary piston pumps, etc., can solve the problem of high operating pressure, achieve the effects of preventing overcompression, improving exhaust efficiency, and small differences

Active Publication Date: 2014-05-07
GUANGDONG MEIZHI COMPRESSOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the operating pressure of CO2 is very high. In the rotary compressor on the high-pressure side of the shell, the pressure resistance needs to be more than 10MPa, and the wall thickness of the iron shell must be at least 7mm. This is a big issue in terms of manufacturability and cost.

Method used

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  • Rotary compressor and refrigerating circulating system with same
  • Rotary compressor and refrigerating circulating system with same
  • Rotary compressor and refrigerating circulating system with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] The shell low-pressure double-cylinder rotary compressor R of embodiment 1 and the refrigerating cycle system such as figure 1 shown. The rotary compressor R is composed of a compression device 4 attached to the inner diameter of the hermetic casing 2, and an electric motor 3 arranged above it. The compression device 4 is composed of a cylinder 10a fixed on the inner diameter of the housing, a middle partition 36 arranged thereunder, a cylinder 10b, a main bearing 25 and an auxiliary bearing 30, etc., and the above components are assembled by screws.

[0066] The exhaust pipe 6 and the oil injection pipe 61 connected at the outer periphery of the intermediate partition 36 are connected with the oil separator S together. Between the oil injection pipe 61 and the oil separator S, a capillary tube T for adjusting the amount of oil supplied to the compression chamber is provided. In addition, an air intake pipe 5 is arranged at the upper end of the housing 2 , and oil 7 i...

Embodiment 2

[0080] Figure 4 with representation Figure 4 Y~Y section of Figure 5 , which shows the lubrication design of the two compression chambers equipped on the compression device 4 . Since the internal pressure of the shell of the high-pressure rotary compressor is the high-pressure side, the oil in the oil pool will automatically lubricate the sliding parts (slides and pistons) and the inside of the compression chamber due to the pressure difference with the compression chamber to prevent the wear of the sliding parts resulting in inefficient compression. However, since the casing pressure of the low-pressure rotary compressor is on the low-pressure side, oil is forcibly supplied to the parts that slide in the compression chamber.

[0081] Figure 4 and Figure 5 As shown, the first oil supply pipe 61 and the second oil supply pipe 71 provided on the intermediate partition 36 are oil supply means for the two compression chambers. Since the first oil supply pipe 61 is opene...

Embodiment 2

[0086] Here, if the oil separation efficiency of the oil separator S is n, nx8% is the amount of oil separated and guaranteed in the oil separator S. If (1-n)x8% cannot be secured, it will become the discharge of the refrigerant circulation system. Oil volume (OCR). Usually, the upper limit of OCR is 1%. In Embodiment 2, if the OCR is 1%, it is consistent with the total oil supply (2g=1%) of the two compression chambers of the second oil supply pipe 71 .

[0087] That is to say, the above-mentioned oil volume control method is related to 2g=OCR. If the efficiency (n) of the oil separator S deteriorates, the oil discharge volume (OCR) will increase, and it is also necessary to increase the delivery from the oil supply pipe to the compression chamber. the necessary fuel supply. Therefore, the oil circulation control method of Embodiment 2 is established. In addition, if the oil separation efficiency (n) is known, the oil supply quantity related to the oil supply pipe 61 and th...

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Abstract

The invention discloses a rotary compressor and a refrigerating circulating system with the same. The rotary compressor comprises a shell, a compression device and a motor, wherein the compression device comprises a first cylinder and a second cylinder which are provided with a first compression cavity and a second compression cavity respectively, a middle partition plate, a first piston, a second piston, a first slip sheet, a second slip sheet, a crankshaft for driving the first piston and the second piston to rotate, a main bearing, an auxiliary bearing, a first exhaust silencer arranged above the main bearing, a second exhaust silencer arranged below the auxiliary bearing, and an exhaust assembly for exhausting high-pressure refrigerants in the first exhaust silencer and the second exhaust silencer. According to the rotary compressor, due to the exhaust assembly, the exhaust efficiency is improved, the volumetric efficiency is improved and overcompression is prevented; in addition, the difference of oil supply amounts of two compression cavities is minimized, the compression efficiency reduction caused by leakage of the refrigerants is prevented and the reliability of sliding parts is improved.

Description

technical field [0001] The invention relates to a two-cylinder rotary compressor whose inner pressure of the casing is a low pressure side, and specifically relates to a rotary compressor and a refrigeration cycle system with the same. Background technique [0002] Equipment equipped with a rotary compressor is widespread all over the world. Basically, all of the rotary compressors have the internal pressure of the casing as the high-pressure side. This is because the high-pressure rotary compressor has advantages in energy efficiency, cost, compactness, and oil control. is advantageous. On the other hand, from the viewpoint of protecting the global environment, the use of natural refrigerants such as CO2 and HC has attracted widespread attention, and plans to apply HC refrigerants to rotary compressors are also being advanced. [0003] However, the operating pressure of CO2 is very high. In the rotary compressor on the high-pressure side of the shell, the pressure resistan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/344F04C29/06F04C29/02F04C29/12F25B1/04
Inventor 小津政雄喻继江高斌王玲
Owner GUANGDONG MEIZHI COMPRESSOR
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