Iterative cooling system refrigerated via mixed work medium for throttling and low temperature eddy expansion

A multi-component mixed working fluid, expansion refrigeration technology, applied in refrigerators, refrigeration and liquefaction, compressors with cascade work, etc., can solve the problems of easily blocked throttling elements, such as refrigeration temperature, fluctuation, and inability to operate effectively. To achieve the effect of reducing heat exchange load, low vibration, and improving heat recovery efficiency

Inactive Publication Date: 2004-03-03
LOW TEMPERATURE TEST CENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mixed working medium primary throttling refrigeration cycle method is to cancel the gas-liquid separator and intermediate throttling valve in the inner cascade cycle, and complete the heat recovery process by a counterflow heat exchanger. This method is conducive to miniaturization, but at low temperature At the end, due to the accumulation and solidification of lubricating oil, it is easy to block the throttling element and cause the fluctuation of refrigeration temperature
Therefore, for mixed refrigerant throttling refrigerators, both the primary throttling method and the internal cascade method have relatively high efficiency above the liquid nitrogen temperature range, but they cannot effectively operate below the liquid nitrogen temperature range.

Method used

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  • Iterative cooling system refrigerated via mixed work medium for throttling and low temperature eddy expansion
  • Iterative cooling system refrigerated via mixed work medium for throttling and low temperature eddy expansion
  • Iterative cooling system refrigerated via mixed work medium for throttling and low temperature eddy expansion

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Embodiment 1

[0038] Embodiment 1: The composite cycle refrigeration system of multi-element mixed working fluid throttling refrigeration and vortex expansion refrigeration of the present invention driven by a single-stage oil-lubricated air-conditioning compressor can reach a temperature range of 30K-60K, and its structural block diagram is shown in figure 1 , the structural diagram of the compressor module CU is shown in figure 2 , the mixed refrigerant intermediate throttling refrigeration module VTU adopts a two-stage multi-element mixed refrigerant sub-module MUZ, and the structure diagram of the first-stage multi-element mixed refrigerant sub-module MUZi is shown in image 3 , the structural diagram of the second-stage multi-element mixed refrigerant sub-module MUZ is shown in Figure 4 , the structural illustration of the vortex tube refrigeration module VTU Figure 5 ;Depend on figure 1 It can be seen that the connection mode of each component in this embodiment is: the outlet of...

Embodiment 2

[0039] Embodiment 2: The structural block diagram of the composite cycle refrigeration system of multi-element mixed working fluid throttling refrigeration and vortex expansion refrigeration reaching the temperature range of 20K in the present invention is shown in figure 1 , the structure diagram of the compressor module CU is shown in figure 2 , the mixed working medium throttling refrigeration module MU adopts a two-stage multi-component mixed working medium refrigeration sub-module MUZ, and its structure is shown in image 3 , the structure of the vortex tube refrigeration module VTU see Figure 5 ,Depend on figure 1 It can be seen that the structure of this embodiment is as follows: the outlet of the high-pressure pipe of the compressor module CU is connected to the high-pressure inlet pipe of the intermediate refrigeration module MU, and the low-pressure inlet pipe of the compressor module CU is connected to the low-pressure outlet pipe of the mixed working medium thro...

Embodiment 3

[0040] Embodiment 3: The multi-element refrigeration and vortex expansion refrigeration compound cycle refrigeration system that uses the present invention to reach the liquid helium temperature zone, its structural block diagram is shown in figure 1 , the structure of the compressor module CU is the same as in Embodiment 1, and the compressor adopts a single-stage oil-lubricated air-conditioning compressor (R22 compressor) of 2.5kW; the structure of the vortex tube refrigeration module VTU is the same as in Embodiment 1; the intermediate refrigeration module adopts three stages Multi-element mixed refrigerant sub-module, wherein the structures of the first-stage multi-element mixed refrigerant sub-module and the second-stage multi-element mixed refrigerant sub-module are the same as those of the first-stage multi-element mixed refrigerant sub-module and the second The second-level multi-component mixed refrigerant sub-module, the structure of the third-level multi-component mi...

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Abstract

The circular refrigerating system includes compressor assembly, intermediate assembly and vortex tube refrigeration assembly; the compressor assembly consists of compressor, front cooler and filtering oil feeder; the intermediate throttling refrigeration assembly consists of 2-3 stage mixed work medium throttling refrigeration sub-modules including gas-liquid separator, throttling element and countercurrent heat exchanger; and the vortex tube refrigeration assembly includes vortex tube, evaporator and countercurrent heat exchanger. In the refrigerator, single compressor for simple and reliable driving and high efficiency multi-component mixed work medium are used without environment harm.

Description

technical field [0001] The invention relates to a refrigeration system in the technical field of low-temperature refrigeration, in particular to a cascade refrigeration system of multi-element mixed working fluid throttling and vortex expansion refrigeration. Background technique [0002] With the development of society, energy, communication and new material technologies that are closely related to human production and life have made great progress. Specific examples include information technology, infrared technology, semiconductor electronic devices, superconducting devices, and low-temperature biomedical engineering. In these high-tech fields, it is necessary to have a stable and reliable low-temperature cold source with a refrigeration temperature of 30K-80K, low vibration, low noise, long life, and low cost. However, the lack of corresponding suitable refrigerators restricts the further development of related fields. The main problems are t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B7/00F25B9/04
Inventor 罗二仓公茂琼吴剑峰周远
Owner LOW TEMPERATURE TEST CENT CHINESE ACAD OF SCI
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