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Turbo refrigerator

一种涡轮制冷机、涡轮压缩机的技术，应用在制冷机、制冷组件、制冷和液化等方向，达到防止释放、降低维修频率、降低轴承损失的效果

Inactive Publication Date: 2017-05-10
MITSUBISHI HEAVY IND THERMAL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, there must be a lubricating oil system for cooling and lubricating the speed-increasing gear, so maintenance such as changing the lubricating oil and changing the oil filter cannot be avoided

Method used

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no. 1 approach

[0032] Below, refer to figure 1 with figure 2 A first embodiment of the present invention will be described.

[0033] figure 1 A configuration diagram showing the turbo refrigerator according to the first embodiment, figure 2 A schematic block diagram showing a turbo compressor applied to a turbo refrigerator.

[0034] Turbo refrigerator 1 such as figure 1 As shown, a closed-cycle refrigeration cycle 9 is provided, and the refrigeration cycle 9 is configured to sequentially connect a turbo compressor 2, a condenser 3, a first decompression device 4, and an air compressor functioning as an economizer via a refrigerant pipe (pipe) 8. Liquid separator 5, second decompression device 6 and evaporator 7.

[0035] The refrigerating cycle 9 of the present embodiment includes a known economizer circuit 10 that sprays the intermediate-pressure refrigerant compressed by the low-pressure-side compression unit 14 of the turbo compressor 2 through the intermediate port and is separat...

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PUM

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Abstract

The objective of the present invention is to provide a turbo refrigerator in which the frequency of maintenance and the incidence of oil leakage due to maintenance can be reduced by the use of an oil-less system, and in which the characteristics of the refrigerant R1233zd (E) can be used to reduce the impact on the environment, the refrigerant being a low-pressure refrigerant that reaches negative pressure at a saturation temperature of 18 DEG C or less. The turbo refrigerator in which the refrigeration cycle is configured by sequentially connecting, via a pipeline, a turbo compressor (2), a condenser, a pressure-reducing device, and an evaporator, and in which a refrigerant is charged into the cycle, wherein: the refrigerant is refrigerant R1233zd(E), which is a low-pressure refrigerant having both a low global warming potential and a low ozone depletion potential; the turbo compressor (2) is a directly coupled turbo compressor (2) in which a rotation shaft (18) of impellers (15, 17) is directly coupled with a motor (19); and magnetic bearings (20, 21, 23, 24) are used as the bearings for supporting the rotation shaft (18).

Description

technical field [0001] The present invention relates to a turbo refrigerator which uses R1233zd(E) refrigerant with low global warming coefficient (GWP) and ozone destruction coefficient (ODP) to reduce environmental load. Background technique [0002] Currently, HFC refrigerants such as R134a are used in turbo refrigerators. It is known that the ozone destruction coefficient (ODP) of this HFC refrigerant is 0, but the global warming coefficient (GWP) is high. Moreover, turbo refrigerators need regular maintenance for bearing replacement, lubricating oil replacement, oil filter replacement, etc. At this time, although the refrigerant in the refrigeration cycle will be recovered and repaired, there will still be problems that cannot be recovered from the refrigerator. The refrigerant and the refrigerant blended into the lubricating oil, sometimes part of the refrigerant is released into the atmosphere. Although there is no problem with laws and regulations in this way, it i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/058F04D29/58F16C32/04F16C33/24F25B1/00F25B1/053
CPCF04D29/058F04D17/122F04D25/0606F04D29/0566F04D29/5806F16C37/002F16C37/005F16C32/0489F16C33/043F16C33/109F25B2400/13F16C2360/44F25B41/39F25B1/053F04D17/10F04D25/02F04D29/053F04D29/063F04D29/284F04D29/582F25B31/002F25B31/006F25B31/008F25B31/026F25B43/006
Inventor 长谷川泰士上田宪治松仓纪行末光亮介大村真太郎
Owner MITSUBISHI HEAVY IND THERMAL SYST
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