Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed in the present invention is a protective disinfection device, which is a personal protective article. The present invention comprises a neck ring and a respirator; each of the neck ring and the respirator is provided with a cavity defined by a housing; the front end of the neck ring and the bottom end of the respirator are connected by means of connection parts; each of the two connection parts is provided with a connection through hole communicated with the cavity, and the two connection through holes are communicated with each other; the shape of the housing on the inner side of the respirator corresponds to the shape of a human face, and a sealing ring capable of fitting the human face is provided on the edge of the respirator; air inlets are provided on the housing of the neck ring, breathing vents corresponding to human nostrils and mouth are provided on the housing on the inner side of the respirator, and a disinfection mechanism is accommodated in the cavity between the air inlets and the breathing vents; an air discharge through hole is provided on the housing on the outer side of the respirator, and a one-way valve is provided in the air discharge through hole. By means of the cooperation of the neck ring and the respirator provided with the disinfection mechanism, the problems of wearing-type personal protection and repeated use are solved, and the protective disinfection device is comfortable to wear and convenient to carry.
A: A knitted binding band for a respirator mask body, the knitted binding band being a fabric that is knitted at once using a knitting machine, the binding band comprising: a central ring body (1) and several binding strips (5) knitted and extending from the edge of the central ring body (1), a through hole (2) being provided in the middle of the central ring body (1). The binding band of the present invention is made at once by knitting, and unlike a cutting or stamping method, the knitting process almost produces no wastes in the whole process, simplifying the fabricating process, and reducing the fabricating costs. The binding band of the present invention is made by knitting, and the knitted structure itself has a porous structure and has good air permeability. When worn by a user, the binding band can quickly vent sweat, ensuring permeability of the skin, ensuring some extent of wearing comfort.
B: A ventilation control apparatus (200), and a breathing mask device (20) provided with the ventilation control apparatus (200). The ventilation control apparatus (200) comprises a cavity (210) and a valve assembly (220). The cavity (210) is provided with an air delivery port (211) and a mask ventilation port (212) which are in communication with one another, the mask ventilation port (212) being used for being in communication with the breathing mask (20). The valve assembly (220) is provided with an air inlet channel and an air discharge channel in communication with the cavity (210) via the air delivery port (211). The valve assembly (220) is configured to connect the air inlet channel when the pressure (P 1 ) within the cavity (210) is less than or equal to the atmospheric pressure (P 0 ), and connect the air discharge channel when the difference (ΔP) between the pressure (P 1 ) within the cavity (210) and the atmospheric pressure (P 0 ) is greater than or equal to a predetermined value. The ventilation control apparatus (200) implements an exhalation phase positive pressure function, and prevents patient discomfort caused by continuous positive pressure. A positive pressure air supply apparatus (such as a CPAP breathing machine) and a pipeline etc. need not be connected during use, thereby facilitating patient movement, and the positive pressure air supply apparatus need not be carried when going out. A patient may carry the breathing mask (20) provided with the ventilation control apparatus (200) at any time for treatment. In addition, the ventilation control apparatus (200) is small in size, convenient to carry, and low in cost.
C: A protective hood, comprising a hood body (1), a breathing filtering mechanism (2), an adjustment mechanism, and a lower sealing component (6). The hood body (1) provided with a visible region, and a breathing opening (11) and a lower mounting opening (15) are formed on the hood body (1); the head of a human body can penetrate through the lower mounting opening (15) to enter the hood body (1); the breathing filtering mechanism (2) is provided at the breathing opening (11) to filter air; the adjustment mechanism can be provided on the hood body (1) and can be in contact fit with the head of the human body so as to adjust the position of the hood body (1); and the lower sealing component (6) is provided at the lower mounting opening (15) so as to seal the space of the lower mounting opening (15) that is not occupied by the human body. Further disclosed are a protective clothing and a protective system. The present application can achieve the omnidirectional protection of the head of the human body and achieve an excellent virus prevention effect, and also can flexibly adjust the position of the hood body (1) relative to the head of the human body, thereby improving the comfort during use.
D: The present disclosure relates to the field of medical instruments. Disclosed are a ventilation and noise reduction housing and assembly, a ventilation and moisture retention apparatus, a breathing mask assembly, and a breathing support device. The ventilation and noise reduction housing comprises a breathing channel segment, one end of the breathing channel segment is a ventilation and noise reduction housing connection end, and the other end of the breathing channel segment is a breathing tube communication end, wherein a channel wall of the breathing channel segment comprises a ventilation and noise reduction unit mounting wall segment, the ventilation and noise reduction unit mounting wall segment is provided with an exhaust port and a support protrusion structure protruding from the outer surface of the ventilation and noise reduction unit mounting wall segment, and the support protrusion structure is used for supporting a ventilation and noise reduction core of a ventilation and noise reduction unit provided on the ventilation and noise reduction unit mounting wall segment, such that a ventilation gap is maintained in at least a part of a space between the ventilation and noise reduction core and the outer surface of the ventilation and noise reduction unit mounting wall segment. The ventilation and noise reduction housing can improve the sanitation while reducing noise, so as to improve the therapeutic effect.
Answer: C