Low temperature cold air two-stage refrigeration system and cold air jet machine thereof

Abstract

The invention discloses a low temperature cold air two-stage refrigeration system and a cold air jet machine thereof. A two-stage refrigeration structure is used, and the gas temperature at a cold air jet outlet can be effectively decreased to -60 DEG C minimum; an air cooler is used, thereby having high jet speed, being beneficial to breaking and removing chips, and having low cooling temperature suitable for high speed and high accuracy machining; and simultaneously, the two-stage refrigeration structures is respectively with a refrigeration bypass used for cooling a medium at the inlet of a compressor; therefore, along with the prolonged life cycle, the temperature of the compressor can not rise without limit, thereby keeping a long-time proper operating state. Through the regulation of the flow rate of the medium of the refrigeration bypass, the temperature of the cold air is capable of being regulated indirectly; the structure is simple, the operation is convenient, and the use cost is decreased.

Description

technical field [0001] The invention relates to a cooling device, in particular to a cold air jet machine and the cold air jet machine. Background technique [0002] During the metal machining process, a large amount of heat will be generated between the tool and the workpiece due to cutting. If it is not cooled, it will have many adverse effects on the machining accuracy and the physical and chemical properties of the workpiece. Existing cooling methods include coolant cooling and wind cooling. [0003] Coolant, also known as cutting fluid, plays a good role in reducing the cutting temperature during application, and is also conducive to chip breaking and chip removal, but at the same time there are problems in use, storage, cleaning and disposal, and the cost is high; The cutting fluid itself will also cause harm to the environment and the health of the operator, and the subsequent treatment of the cutting fluid will directly increase the metal and processing costs. Ther...

AI Technical Summary

Problems solved by technology

However, the existing air coolers basically have a relatively complicated structure, and the use process is also relatively complicated. The temperature of the cold air can only drop to -30°C, which is not suitable for high-speed and high-precision CNC machine tools; at the same time, the existing The more serious disadvantage of the air cooler is that the temperature of the compressor will gradually rise after long-term use, and there are no effective control measures, which will limit the service life and use environment of the compressor

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