The invention relates to a medical nebulizer and more particularly to a medical nebulizer having capability for reducing the remaining amount of liquid medication, the medical nebulizer has an improved structure which simplifies the medical nebulizer structure into two integrally formed housings, therefore the medical nebulizer can ensure the accuracy of product assembly and atomization effect, the medical nebulizer has a conical cover to recycle larger aerosol particles, and the larger aerosol particles can be atomized again.
A first prior-art is disclosed in U.S. Pat. No. 4,512,341 (its patent family has United Kingdom Patent No. GB2132508B), the first prior-art disclosed a nebulizer, the feed of the nebulizer to a spray nozzle is through a narrow space between the flat bottom of the liquid reservoir and a flange fixed to the bottom of the spray nozzle, wherein the space is narrow enough to draw liquid toward the spray nozzle by capillary action. When the liquid passed through a rounded diffuser and an inverted conical portion at high speed, the liquid will impact to a baffle plate to produce an aerosol, larger droplets are coalesced by the baffle plate, therefore the larger droplets can fall down to the liquid reservoir. The rounded diffuser may cause larger droplets to spray on a main body wall of the nebulizer, therefore the larger droplets will partially remain on the main body wall. Moreover, according to the description of the first prior-art, the flange located on the bottom of the spray nozzle almost extends to the wall surrounding the liquid reservoir, and when the water level of the liquid approaches the flange, the larger droplets will fall down to the flange, and the larger droplets will remain on the upside of the flange. Thus, the first prior-art still requires improvement to further reduce the remaining amount of liquid medication.
A second prior-art is disclosed in U.S. Pat. No. 5,738,086 (its patent family has Australia Publication No. AU1181595A, Canadian Publication No. CA2157581A1, EPO Publication No. EP0691862A1, Japan Publication No. JPH08508671A, New Zealand Publication No. NZ276953A, U.S. Pat. No. 5,579,757, PCT Publication No. WO9520989A1), the second prior-art disclosed a nebulizer, the nebulizer has a liquid spray nozzle and a nebulizer diffuser, the liquid spray nozzle is a separate element. When the nebulizer is assembled, there is a distance between a fluid orifice of the liquid spray nozzle and the nebulizer diffuser, the distance may exist a difference on the combination, that may affect the atomization effect. Moreover, according to the description of the second prior-art, an annular flange extends inwardly around the top of the second baffle, and a pair of diffuser legs having longitudinal spaces extend downward from the inwardly extending annular flange to support the nebulizer diffuser. The nebulizer diffuser is exposed to the second baffle, the nebulizer diffuser may cause larger droplets to spray on the inner wall of the nebulizer, therefore the larger droplets will partially remain on the inner wall. Thus, the second prior-art still requires improvement to further reduce the remaining amount of liquid medication.
It is therefore a first object of the invention to provide a medical nebulizer with improved structure comprising a first housing and a second housing, the first housing integrally formed a first nozzle, the first nozzle has a first nozzle hole, the second housing integrally formed a second nozzle and a conical cover, the second nozzle has a second nozzle hole, the inside of the conical cover has a protrusion and an annular inclined surface, the protrusion formed a impacting surface to produce aerosol; wherein the second housing is separable assembled to the first housing, the second nozzle is located on the outside of the first nozzle, a fluid passage is formed between the first nozzle and the second nozzle, the first nozzle hole is located on the inside of the second nozzle hole, the impacting surface is located above the second nozzle hole.
It is therefore a second object of the invention to provide a medical nebulizer with improved structure comprising a first housing and a second housing, the first housing integrally formed a first nozzle, the first nozzle has a first nozzle hole, the second housing integrally formed a second nozzle and a conical cover, the second nozzle has a second nozzle hole, the inside of the conical cover has an annular inclined surface and a impacting surface for producing aerosol; wherein the second housing is separable assembled to the first housing, the second nozzle is located on the outside of the first nozzle, a fluid passage is formed between the first nozzle and the second nozzle, the first nozzle hole is located on the inside of the second nozzle hole, the impacting surface is located above the second nozzle hole.
First advantages of the invention include a second nozzle and a conical cover are integrally formed on the second housing, a distance existed between a impacting surface of producing aerosol and a second nozzle hole, the distance is determined by the mold, therefore the distance will not exist a difference on the combination. Thus the medical nebulizer can ensure the accuracy of product assembly and atomization effect.
Second advantages of the invention include the impacting surface of producing aerosol is located on the inside of the conical cover, most of larger droplets will be sprayed to an annular inclined surface of the conical cover, and therefore can reduce the droplets to attach to the inner wall of the medical nebulizer.
Third advantages of the invention include the conical cover can form a suitable space of aerosol escaping by the annular inclined surface and the second nozzle, the annular inclined surface is helpful to the collection of larger droplets and the dropping of larger droplets. Thus, the invention is optimized between the escaping amount of aerosols and the collection amount of larger droplets.
The above and other objects, features and advantages of the invention will become apparent from the following detailed description taken with the accompanying drawings.
Referring to
Referring to
Examples of the manufacture manner of the first housing 10 and the second housing 20 will be illustrated below, the first nozzle 12 and the gas inlet tube 14 are integrally formed on the first housing 10, the second nozzle 22 and the conical cover 25 are integrally formed on the second housing 20; wherein the first pitch D1 formed between the impacting surface 253 and the second nozzle hole 220 is determined by the mold, therefore the first pitch D1 will not exist a difference on the combination. Thus the invention can ensure the accuracy of product assembly and atomization effect.
Examples of the connecting manner of the aerosol outlet tube 24 and the conical cover 25 will be illustrated below, the aerosol outlet tube 24 is connected to the conical cover 25 by a plurality of first connecting ribs 27, each pair of the adjacent connecting ribs 27 can form an aerosol window 271, the height of the conical cover 25 is in the range of 3 mm to 8 mm; wherein the aerosols 31 can enter the aerosol outlet tube 24 from the aerosol window 271, and the aerosols 31 can be outputted from the aerosol outlet tube 24 (as shown in
Examples of the connecting manner of the second nozzle 22 and the conical cover 25 will be illustrated below, the conical cover 25 is connected to the second nozzle 22 by a plurality of second connecting ribs 28 (as shown in
Examples of the positional relationship of the second nozzle hole 220 and the annular inclined surface 252 will be illustrated below, a third pitch D3 is formed between the second nozzle hole 220 and the bottom edge 254 of the annular inclined surface 252, the third pitch D3 is in the range of 0.1 mm to 3 mm, the annular inclined surface 252 of the conical cover 25 forms an angle a, the angle a is in the range of 40 degrees to 70 degrees; the conical cover 25 can form a suitable space of aerosol escaping by the annular inclined surface 252 and the second nozzle 22, the annular inclined surface 252 is helpful to the collection of larger droplets 32 and the dropping of larger droplets 32. Thus, the invention is optimized between the escaping amount of aerosols 31 and the collection amount of larger droplets 32 (as shown in
Examples of a first practice manner of the fluid passage 26 will be illustrated below, a first gap g1 is formed between an end edge 223 of the second nozzle 22 and the bottom portion 13 of the first housing 10, the fluid passage 26 can be formed by a second gap g2 which located between the first nozzle 12 and the second nozzle 22 (as shown in
Examples of a second practice manner of the fluid passage 26 will be illustrated below, a first gap g1 is formed between an end edge 223 of the second nozzle 22 and the bottom portion 13 of the first housing 10, the second nozzle 22 is provided with a plurality of inner grooves 261 to form the fluid passage 26 (as shown in
Examples of the structural change of the first housing 10 and the second housing 20 will be illustrated below, the bottom portion 13 of the first housing 10 has an inclined extension surface 15 to reduce the remaining amount of the liquid 30 (as shown in
Examples of the structural change of the second housing 20 will be illustrated below, the aerosol outlet tube 24 has a first outlet tube 241 and a second outlet tube 242, the first outlet tube 241 is located on outside of the top portion 23 of the second housing 20, the second outlet tube 242 is located on inside of the top portion 23 of the second housing 20; when the medical nebulizer of the invention is tilted, the second outlet tube 242 can prevent the liquid 30 flow from the second housing 20 (as shown in
Examples of the combination manner of the first housing 10 and the second housing 20 will be illustrated below, the first housing 10 has a plurality of positioning blocks 19, the second housing 20 has a plurality of positioning slots 29; when the first housing 10 and the second housing 20 relatively rotate to each other, each of the positioning blocks 19 can enter into each of the positioning slots 29, or each of the positioning blocks 19 can escape from each of the positioning slots 29 (as shown in
Referring to
Referring to
Examples of the manufacture manner of the first housing 10 and the second housing 20 will be illustrated below, the first nozzle 12 and the gas inlet tube 14 are integrally formed on the first housing 10, the second nozzle 22 and the conical cover 25 are integrally formed on the second housing 20; wherein the first pitch D1 formed between the impacting surface 253 and the second nozzle hole 220 is determined by the mold, therefore the first pitch D1 will not exist a difference on the combination. Thus the invention can ensure the accuracy of product assembly and atomization effect.
Examples of the connecting manner of the aerosol outlet tube 24 and the conical cover 25 will be illustrated below, the aerosol outlet tube 24 is connected to the conical cover 25 by a plurality of first connecting ribs 27, each pair of the adjacent connecting ribs 27 can form an aerosol window 271, the height of the conical cover 25 is in the range of 3 mm to 8 mm; wherein the aerosols 31 can enter the aerosol outlet tube 24 from the aerosol window 271, and the aerosols 31 can be outputted from the aerosol outlet tube 24 (as shown in
Examples of the connecting manner of the second nozzle 22 and the conical cover 25 will be illustrated below, the conical cover 25 is connected to the second nozzle 22 by a plurality of second connecting ribs 28 (as shown in
Examples of the positional relationship of the second nozzle hole 220 and the annular inclined surface 252 will be illustrated below, a third pitch D3 is formed between the second nozzle hole 220 and the bottom edge 254 of the annular inclined surface 252, the third pitch D3 is in the range of 0.1 mm to 3 mm, the annular inclined surface 252 of the conical cover 25 forms an angle a, the angle a is in the range of 40 degrees to 70 degrees; the conical cover 25 can form a suitable space of aerosol escaping by the annular inclined surface 252 and the second nozzle 22, the annular inclined surface 252 is helpful to the collection of larger droplets 32 and the dropping of larger droplets 32. Thus, the invention is optimized between the escaping amount of aerosols 31 and the collection amount of larger droplets 32 (as shown in
Examples of a first practice manner of the fluid passage 26 will be illustrated below, a first gap g1 is formed between an end edge 223 of the second nozzle 22 and the bottom portion 13 of the first housing 10, the fluid passage 26 can be formed by a second gap g2 which located between the first nozzle 12 and the second nozzle 22 (as shown in
Examples of a second practice manner of the fluid passage 26 will be illustrated below, a first gap g1 is formed between an end edge 223 of the second nozzle 22 and the bottom portion 13 of the first housing 10, the second nozzle 22 is provided with a plurality of inner grooves 261 to form the fluid passage 26 (as shown in
Examples of the structural change of the first housing 10 and the second housing 20 will be illustrated below, the bottom portion 13 of the first housing 10 has an inclined extension surface 15 to reduce the remaining amount of the liquid 30 (as shown in
Examples of the structural change of the second housing 20 will be illustrated below, the aerosol outlet tube 24 has a first outlet tube 241 and a second outlet tube 242, the first outlet tube 241 is located on outside of the top portion 23 of the second housing 20, the second outlet tube 242 is located on inside of the top portion 23 of the second housing 20; when the medical nebulizer of the invention is tilted, the second outlet tube 242 can prevent the liquid 30 flow from the second housing 20 (as shown in
Examples of the combination manner of the first housing 10 and the second housing 20 will be illustrated below, the first housing 10 has a plurality of positioning blocks 19, the second housing 20 has a plurality of positioning slots 29; when the first housing 10 and the second housing 20 relatively rotate to each other, each of the positioning blocks 19 can enter into each of the positioning slots 29, or each of the positioning blocks 19 can escape from each of the positioning slots 29 (as shown in
Number | Date | Country | Kind |
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10 6121339 | Jun 2017 | TW | national |
10 6209301 | Jun 2017 | TW | national |