Telescopic exhaust device with heat preservation and noise reduction functions

Abstract

The invention relates to the field of machinery, in particular to an exhaust device. The telescopic exhaust device with heat preservation and noise reduction functions comprises an exhaust pipe body, and the exhaust pipe body comprises at least three telescopic joints; and each telescopic joint comprises a supporting ring, and further comprises a first outer-layer rotating cantilever, a second outer-layer rotating cantilever, a first inner-layer rotating cantilever and a second inner-layer rotating cantilever which are arranged on the supporting ring. By means of the design, the telescopic exhaust device with the heat preservation and noise reduction functions is provided, an exhaust pipe is a complete annular pipeline formed by sequentially arranging the multiple telescopic joints, a cavity used for storing air is formed in the pipe wall formed by connecting the multiple telescopic joints, a heat preservation layer is formed through the air in the cavity, the telescopic performance of the pipeline is guaranteed, the plastic consumption and cost of the pipeline are reduced, and the heat preservation performance of the ventilating pipeline is improved; and meanwhile, the cavity structure is formed in the pipe wall, so that noise transmission in the pipeline can be reduced, and the sound insulation effect of the pipeline is improved.

Description

technical field [0001] The present invention relates to the mechanical field, in particular, to an exhaust device. Background technique [0002] At present, the exhaust pipes and ventilation pipes are mainly made of PP, PU, ​​PVC, TPE, nylon cloth and other materials, which are mostly used for ordinary exhaust, ventilation, smoke and dust, powder, wood chips, etc. Exhaust with retractable structure on the market The air duct is a single-layer structure, and the pipe wall is generally made of plastic material and is lined with hard materials such as steel wire as a support. It is commonly used in the exhaust duct of mobile air conditioners. [0003] However, this type of exhaust pipe with a retractable structure does not have a good thermal insulation effect, especially in some environments that require thermal insulation, it often cannot achieve a good use effect, such as: the exhaust pipe of a mobile air conditioner, The air supply pipes of central air conditioners, etc., ...

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Problems solved by technology

[0003] However, this type of exhaust pipe with a retractable structure does not have a good thermal insulation effect, especially in some environments that require thermal insulation, it often cannot achieve a good use effect, such as: the exhaust pipe of a mobile air conditioner, The air supply pipes of central air conditioners, etc., because their heat insulation effect is related to the thermal conductivity of the pipe wall material and the wall thickness of the pipe wall, the lower the thermal conductivity, the better the heat insulation effect, and the thicker the wall thickness, the better the heat insulation effect; usually, Existing exhaust pipes are made of materials such as PP with a thermal conductivity of 0.21W / mK-0.26W / mK, PVC with a thermal conductivity of 0.14W / mK-0.17W / mK, or PU with a thermal conductivity of about 0.25W / mK. It is a single-layer structure and the wall thickness is relatively thin. For example, the wall thickness of the exhaust pipe of a mobile air conditioner is about 0.5mm, so its thermal insulation effect is poor; when the temperature difference between the fluid temperature in the pipe and the ambient temperature outside the pipe is large, the pipe There is a relatively obvious heat exchange between the fluid and the environment outside the tube, resulting in poor energy saving effect and reducing the use effect of the equipment

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