Silencer and respirator therewith

A noise reduction device and fan technology, applied in the direction of noise reduction devices, respirators, mechanical equipment, etc., can solve the problems of limited sound reduction means, achieve the effect of reducing low-frequency noise, small size, and simple structure

Inactive Publication Date: 2007-11-21
KAIDITAI BEIJING MEDICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be said that the use of airway sound absorption and sound insulation is a contradiction with controlling the increase in

Method used

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  • Silencer and respirator therewith
  • Silencer and respirator therewith
  • Silencer and respirator therewith

Examples

Experimental program
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Example Embodiment

[0033] The preferred embodiment of the muffler of the present invention is shown in Figure 8. The muffler is provided with a spiral air passage inside, and the air inlet 1 of the spiral air passage is provided at the outer end of the spiral air passage. The muffler device includes a main body 10 and an upper part. The cover 9 and the upper cover 9 are buckled on the main body 10, and a plane spiral air passage is formed between them.

[0034] The main body 10 of the silencer device is shown in FIGS. 1, 2, 3, and 4, the air outlet 6 of the spiral air passage 3 is arranged at the center of the inner end of the spiral air passage 3 and perpendicular to the spiral plane of the spiral air passage 3. The air inlet 1 of the spiral air passage 3 is along the tangential direction of the spiral line of the spiral air passage 3. The spiral shape of the spiral air passage 3 can be an involute, an equidistant spiral, an Archimedes spiral, or other forms of spiral.

[0035] The inner edge 4 of ...

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Abstract

A noise reduction device used on rebreather is prepared as setting spiral air passage at internal of said device, arranging air inlet at external end of said air passage and air outlet at internal end center of said air passage, setting round arc-surface structure on side wall of spiral air passage and convex shoulder between side wall top-edge and air inlet. The said noise reduction device is installed at air inlet of fan on rebreather.

Description

technical field [0001] The invention relates to a noise reduction device and a ventilator using the noise reduction device. Background technique [0002] At present, non-invasive ventilators are the most common type of ventilators that use motors to drive the air source. Non-invasive ventilators are used for the treatment of respiratory diseases such as sleep apnea syndrome and COPD (chronic obstructive airway disease). The currently popular types of non-invasive ventilators mainly include CPAP (providing stable positive pressure output when the patient breathes), AUTOCPAP (providing positive pressure output to the patient. When the airway resistance of the patient increases and affects normal breathing, the ventilator automatically increases Output pressure until the patient is breathing normally; when the patient is breathing normally, the ventilator will reduce the output pressure to the lower limit pressure to maintain the patient's normal breathing), Bi-Level CPAP (pro...

Claims

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Application Information

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IPC IPC(8): G10K11/16F01N1/00F16L55/02A61M16/00
Inventor 王鸿庆
Owner KAIDITAI BEIJING MEDICAL SCI
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