Abstract: A suction device includes a negative pressure generator, a connector and a mask; the negative pressure generator including a housing and a piston rod. The housing is internally provided with a cavity, an upper end of the housing is provided with an avoidance hole communicated with the cavity, and a lower end thereof is provided with an opening communicated with the cavity. The piston rod includes a push-pull rod and a piston sleeved on the push-pull rod, an upper end of the push-pull rod runs through the avoidance hole, and the piston is movably and hermetically connected to an inner side wall of the housing by a sealing ring. An upper side of the mask is provided with a through first connecting cylinder, and a lower side is provided with a flexible annular pad configured to fit with the face.

Abstract: An ozone disinfection device with an ozone recovery module, the device being further configured to connect to a hose or respiratory device to disinfect the hose or the respiratory device. In this disclosure, the ozone disinfection device includes the ozone recovery module that includes a filter. A total surface area, a specific surface area, and a porosity of at least one filter material in the filter are defined to increase the filter's recovery efficiency. Furthermore, the filter may also be detachable, in cooperation with a housing structure, enabling a user to inspect or replace the filter independently and thus prolonging the overall service life of the ozone disinfection device. In some embodiments, the ozone disinfection device also includes at least one sensor and an alarm system to achieve intelligent control and prevent potential hazards.

Abstract: A suction device includes a negative pressure generator, a connector and a mask; the negative pressure generator comprises a housing and a piston rod, wherein the housing is internally provided with a cavity, an upper end of the housing is provided with an avoidance hole communicated with the cavity, and a lower end thereof is provided with an opening communicated with the cavity; the piston rod comprises a push-pull rod and a piston sleeved on the push-pull rod, an upper end of the push-pull rod runs through the avoidance hole, and the piston is movably and hermetically connected to an inner side wall of the housing by means of a sealing ring; an upper side of the mask is provided with a through first connecting cylinder, and a lower side thereof is provided with a flexible annular pad configured to fit with the face.