Thermal isolation suitable for isolating the gas discharge tube of refrigerating compressor, and process of assembling the isolation in the gas discharge tube

Abstract

The present invention relates to a thermal isolation, suitable for isolating the gas discharge tube (13) of a refrigerating compressor (1), where the discharge tube (13) is arranged inside an isolating tube (14), forming at least a confined space between said tubes, the novelty basically consisting in that the isolating tube (14) comprises covers (15, 17) spaced apart, the cross section of the isolating tube (14) being formed by joining together the cross sections of the spaced apart covers (15, 17). In the preferred embodiment of the invention, the isolating tube (14) comprises multiple spacers, preferably annular spacers (16), arranged around the gas discharge tube (13 and the isolating tube (14), the isolating tube (14) consisting of a number tube portions (20, 26) joined together along the extension of the gas discharge tube (13). The invention also relates to a process for assembling the thermal isolation in the gas discharge tube.

Description

technical field [0001] The present invention relates to a thermal insulation member for isolating a discharge pipe of a refrigerating compressor, wherein the discharge pipe is arranged in the isolation pipe, and a closed space is formed between the discharge pipe and the isolation pipe. The enclosed space can be evacuated or filled with air or other gas. Background technique [0002] It is well known that in order to improve the performance of refrigeration compressors, it is necessary to reduce the substantial heat loss due to heating of the suction gas along the internal passage of the compressor, from its casing inlet to the compressor cylinder. [0003] In addition to performance concerns, the reduction in internal temperature of components improves compressor life due to reduced wear of bearings and aging of other non-metallic components such as rubber and polymers. [0004] It has been shown that the increase in the temperature of the suction gas and the internal comp...

AI Technical Summary

Problems solved by technology

However, a disadvantage of this corrugated structure is that the corrugations act like vanes, increasing the heat exchange area, and therefore, cannot provide a satisfactory thermal insulation for the exhaust pipe

[0009] Another disadvantage is that corrugated pipes have a higher cost compared to smooth pipes

[0010] Furthermore, in the area of ​​the isolation elbow, the bellows are not structurally able to keep a distance from the exhaust pipes to be insulated, therefore, they would rest against said exhaust pipes, causing thermal short circuits, which would reduce the effectiveness of the insulation

[0011] The biggest difficulty with isolating the exhaust pipe is that it has many bends to meet design structural and vibration requirements

The usual isolation system, as well as the isolation system mentioned in the aforementioned patent, requires the isolation tube to be inserted on the exhaust pipe. For thermal isolation parts with multiple elbows, this makes the installation process very time-consuming and affects productivity.

The presence of numerous bends makes the installation process almost impossible

In addition, the exhaust pipe will undergo multiple processes during compressor assembly, such as welding, and the presence of isolated parts will make the job more difficult at this time

Images