7 results about "Respiratory chamber" patented technology

This invention discloses a gas and riot helmet, comprising a helmet body, a mask assembly, a clean air channel, and a filter replacement mechanism. The mask assembly is mounted on the helmet body and can switch between an open position and a sealed wearing position, forming a sealed contact with the wearer's face and defining the breathing chamber in the sealed wearing position; the clean air channel communicates with the breathing chamber. The filter replacement mechanism includes a chamber, an external door, a shut-off valve, a carrier, a shifting component, and an interlocking component. The chamber contains a clean air connection chamber, an isolation transfer chamber, and an external access chamber, which are separated from each other. The carrier and shifting component allow the filter to switch between a working position, an isolation position, and a loading position. The interlocking component restricts the sequence of action of the external door, shut-off valve, and shifting component, ensuring that the filter can be replaced while the mask assembly remains sealed, thereby reducing the risk of the breathing chamber being exposed to the external contaminated environment during replacement and improving continuous protection safety.

The present invention provides a patient interface including a cushion assembly, a headgear assembly, an elbow assembly and transition ring structure and a headgear secure assembly. The cushion assembly, the elbow assembly and the headgear secure assembly are assembled together by the transition ring structure. The cushion assembly is sealed with a face of a patient when in use. The headgear secure assembly is for connecting the headgear so as to secure the patient interface at the face of the patient when in use. The cushion assembly is provided with a cylindrical wall for delivering an air flow, and the cylindrical wall projects in two opposite directions along an axis of an opening thereof, so as to provide an air flow of a breathing chamber with a flow diversion guiding effect. Thus, the patient interface can be worn and used with better comfort and convenience.

The application provides a filter box and a breathing filter, and belongs to the technical field of air filter equipment. The filter box comprises a front shell and a rear shell. The top of the rear shell is provided with a rear protruding part extending upward. The rear shell wraps the mouth of a human body, and the rear protruding part wraps the nose of the human body. A rear air inlet is formed in the rear side wall of the rear shell. An air inlet valve is mounted on the rear side of the rear air inlet. The rear side wall of the rear shell below the air inlet is inclined to the rear side. A rear air outlet is formed in the rear protruding part. An air outlet valve is mounted on the front side of the rear air outlet. The gap between the rear shell and the nose and the mouth of the human body constitutes a breathing cavity in communication. The filter box provided by the application does not need to penetrate the bottom of the rear shell. Therefore, the part of the filter cavity below the rear air inlet can be inclined to the rear side, thereby increasing the space of the filter cavity, filling more filter fillers in the filter cavity, and improving the filtering effect.

A patient interface includes a cushion assembly, a headgear assembly, an elbow assembly, a transition ring structure, and a headgear fixation assembly. The cushion assembly, the elbow assembly, and the headgear fixation assembly are assembled together by the transition ring structure. The cushion assembly forms a seal with a patient's face in use. The headgear fixation assembly is for the headgear assembly to connect to in order to secure the patient interface to the patient's face in use. A cylindrical wall for delivering a flow of air is provided on the cushion assembly, which projects in two opposite directions along an axis of its opening in order to create a split flow guidance effect on the flow of air in the breathing cavity. In this way, the patient interface can be comfortably and conveniently worn and used.

A non-horizontal folding mask is provided. A breathable region of a mask body is provided with at least one non-horizontally extended folding portion; and the folding portion is a folding and breathing filtration layer. During use, unfolding the folding portion can increase an area of the breathable region of the mask body to improve the filtering effect, and can accommodate and buffer more exhaled gas to effectively prevent escape of the gas from an upper end of a nose and a chin to further improve the filtering effect. The non-horizontally extended folding portion can support a breathing chamber formed by unfolding the mask body overall, preventing collapse and expansion of the breathing chamber in the breathing process to avoid gas leakage.