Noise reduction device for positive pressure ventilation equipment

Abstract

The invention discloses a noise reduction device for positive pressure ventilation equipment. The object of the present invention is to provide a noise reduction device for positive pressure ventilation equipment. The present invention comprises an upper cover, a middle body and a base. The middle body is located between the upper cover and the base. Connected; B. The middle body is composed of upper and lower layers. The upper layer includes a fan placement chamber, an air outlet buffer chamber, and an air outlet. A centrifugal fan is placed in the fan placement chamber, and the centrifugal fan outlet communicates with the outlet buffer chamber. ; The lower layer includes an air inlet and an air cavity. There is an anti-noise return port in the air cavity. The present invention is mainly used as a noise reduction device for positive pressure ventilation equipment.

Description

technical field [0001] The invention relates to a noise reduction device, in particular to a noise reduction device for positive pressure ventilation equipment. Background technique [0002] Common positive pressure ventilation equipment currently on the market is too noisy when used, which seriously affects the sleep quality of patients and their families. Although it can relieve snoring, hypoventilation and other diseases, it greatly reduces the patient's mental outlook, thereby affecting work, study, and quality of life. . In addition, long-term exposure to high-decibel noise can damage the patient's hearing. Most of the existing positive pressure ventilation equipment is driven by a motor to generate an air source, and the positive pressure ventilation equipment is generally used for the treatment of respiratory diseases such as sleep apnea syndrome and COPD (chronic obstructive airway disease). The feature of this equipment is that the centrifugal fan is used to rotat...

AI Technical Summary

Problems solved by technology

However, these methods all have the problems of low space utilization, poor noise isolation, and untreated air outlet noise.

[0003] The above methods are not ideal, and have not fundamentally solved the noise problem

90% of the noise is caused by the friction between the fan blades and the air and the bottle mouth effect. Simply doing sound insulation, sound absorption and shock absorption cannot achieve the desired effect, and will increase the volume and weight of the equipment, as well as increase the airway resistance. If High airway resistance will reduce the sensitivity of the system's sensors to changes in human airway resistance, affecting the normal operation of the device

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