Carbon dioxide refrigerating system and refrigerating method thereof

A carbon dioxide, refrigeration system technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of low efficiency, high cost, complex system structure and other problems of refrigeration systems, and achieve improved refrigeration efficiency, high natural content, and improved condensation. amount of effect

Active Publication Date: 2020-02-21
JINGKELUN REFRIGERATION EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these improvements can improve the energy efficiency performance of the carbon dioxide side refrigeration system to a certain extent, the system structure is complicated, the cost is high, it is difficult to debug and maintain, and the overall refrigeration system efficiency is still very low; It is necessary to add other refrigerants (such as freon) to maintain the normal operation of the system, which neither can make full use of the advantages of natural working medium carbon dioxide as a refrigerant nor is it conducive to environmental protection
[0004] In summary, based on the characteristics of carbon dioxide refrigerants, extensive research has been carried out. Since different regions have different temperature and humidity, and there is a huge difference between winter and summer, there is still a technical bias, when the ambient temperature is higher than the critical value of carbon dioxide When the carbon dioxide refrigeration system is difficult to use for large-scale refrigeration

Method used

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  • Carbon dioxide refrigerating system and refrigerating method thereof
  • Carbon dioxide refrigerating system and refrigerating method thereof
  • Carbon dioxide refrigerating system and refrigerating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] see figure 1 As shown, a carbon dioxide refrigeration system provided in this embodiment includes a compressor 10, a condenser 11, a liquid receiver 12 and an evaporator 13 connected in sequence, and the carbon dioxide gas discharged from the compressor 10 enters the condenser 11 and is Condensed into a liquid and stored in the liquid storage device 12, the carbon dioxide liquid is evaporated and refrigerated in the evaporator 13 and then flows back to the compressor 10 for repeated use to realize the cycle of carbon dioxide; a suction assembly 15 is arranged between the compressor 10 and the condenser 11 , the suction assembly 15 communicates with the reservoir 12 ( Figure 19 shown) or communicate with the gas-liquid separator 14 ( figure 1 shown), the gas-liquid separator 14 is arranged between the condenser 11 and the liquid receiver 12, and the carbon dioxide gas in the liquid receiver 12 or the gas-liquid separator 14 can be drawn back to the compressor 10 and th...

Embodiment 2

[0102] The difference between this embodiment and Embodiment 1 is that the condenser in this embodiment is clearly a flash condenser, and the system flow is the same as that in Embodiment 1. In the refrigeration system using carbon dioxide as the cooling medium, due to the low critical point of carbon dioxide, it is currently impossible to solve the problem of liquefying gaseous carbon dioxide when the external temperature is too high. The scope of refrigeration cannot be widely used. The applicant of the present invention has been studying the refrigeration system using carbon dioxide as the refrigeration medium. The first generation developed the ground source condensation technology, which has been widely used. After years of research, a new flash evaporation Condensation technology solves the technical problem of condensing carbon dioxide medium for refrigeration, so that the condensation pressure of carbon dioxide is not higher than its critical pressure and is completely ...

Embodiment 3

[0138] The content of this embodiment includes the technical solutions of Embodiment 1 and Embodiment 2. On the basis of Embodiment 1 and Embodiment 2, in order to realize the use of carbon dioxide medium for refrigeration, it can also be switched to heating mode, see Figure 16 and Figure 17 As shown, the carbon dioxide refrigeration and heating system includes a first four-way reversing valve 35, a second four-way reversing valve 36, and a third four-way reversing valve 37. The four outlets of the first four-way reversing valve 35 respectively pass through The gas pipeline is connected to the inlet of the condenser 11, the inlet of the compressor 10, the outlet of the compressor 10, and the outlet of the evaporator 13; two of the outlets of the second four-way reversing valve 36 are respectively connected to the outlet of the condenser 11, the gas-liquid Separator 14 inlet (or reservoir 12 inlet), other two outlets are respectively connected with two outlets of the third f...

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Abstract

The invention relates to a carbon dioxide refrigerating system and a refrigerating method thereof. The carbon dioxide refrigerating system comprises a compressor, a condenser, a liquid storage deviceand an evaporator which communicate in sequence, wherein a suction assembly is arranged between the compressor and the condenser; the suction assembly communicates with the liquid storage device or agas-liquid separator; the gas-liquid separator is arranged between the condenser and the liquid storage device; and carbon dioxide gas in the liquid storage device or the gas-liquid separator can be pumped back into a pipeline between the compressor and the condenser through the suction assembly. The carbon dioxide refrigerating system has the beneficial effects that the gas and liquid can be effectively separated, and part of the liquid can be flashed to subcool the carbon dioxide; the flash evaporation type condenser can achieve a refrigerating effect through radiation, and aerosol is formedin a cavity, so that the evaporation and the cooling are rapid and the refrigerating efficiency is increased; and the refrigerating system is simple in structure, convenient to operate and low in installation and maintenance costs.

Description

technical field [0001] The invention relates to the refrigeration field, in particular to a carbon dioxide refrigeration system and a refrigeration method thereof. Background technique [0002] In the field of refrigeration, Freon is mostly used as refrigerant at home and abroad at present, but Freon will destroy the ozone layer of the atmosphere, resulting in a higher greenhouse effect. Ammonia (R717) is not an economical and safe refrigerant because of its instability and high cost, and it will also cause unsafe factors in the refrigeration system. As the international community pays more and more attention to energy conservation, emission reduction and environmental protection, the phase-out of Freon refrigerants is also accelerating. As a safe and environmentally friendly refrigerant, carbon dioxide has broad application prospects and considerable economic value. . However, due to the inherent characteristics of carbon dioxide, when the working temperature is higher th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/00F25B43/00F25B40/02F25B39/04F25B41/31
CPCF25B9/008F25B43/00F25B9/002F25B49/02F25B41/30F25B13/00F25B41/00F25B2341/0014F25B2400/23F25B41/20F25B41/39F25B40/02F25B2313/02741
Inventor 杨建国周成君康建慧
Owner JINGKELUN REFRIGERATION EQUIP CO LTD
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