US20230380567A1 - Diffuser - Google Patents
Diffuser Download PDFInfo
- Publication number
- US20230380567A1 US20230380567A1 US18/266,524 US202118266524A US2023380567A1 US 20230380567 A1 US20230380567 A1 US 20230380567A1 US 202118266524 A US202118266524 A US 202118266524A US 2023380567 A1 US2023380567 A1 US 2023380567A1
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- US
- United States
- Prior art keywords
- projections
- grille
- air
- diffuser
- central portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 description 13
- 230000002093 peripheral effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 206010019049 Hair texture abnormal Diseases 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D20/00—Hair drying devices; Accessories therefor
- A45D20/04—Hot-air producers
- A45D20/08—Hot-air producers heated electrically
- A45D20/10—Hand-held drying devices, e.g. air douches
- A45D20/12—Details thereof or accessories therefor, e.g. nozzles, stands
- A45D20/122—Diffusers, e.g. for variable air flow
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
- A45D20/00—Hair drying devices; Accessories therefor
- A45D20/04—Hot-air producers
- A45D20/08—Hot-air producers heated electrically
- A45D20/10—Hand-held drying devices, e.g. air douches
- A45D20/12—Details thereof or accessories therefor, e.g. nozzles, stands
Landscapes
- Cleaning And Drying Hair (AREA)
- Duct Arrangements (AREA)
Abstract
A diffuser for attachment to an airflow outlet end of a hair dryer has an air inlet, a grille having a central portion and a plurality of air outlets for emitting a first part of the airflow; and a plurality of projections upstanding from the grille for contacting hair and emitting a second part of the airflow. The projections include a set of inner projections arranged about the central portion of the grille, and a set of outer projections arranged about the inner projections. The air outlets of a first subset of inner projections are arranged to emit air away from the central portion of the grille and the air outlets of a second subset of inner projections are arranged to emit air towards the central portion of the grille. The air outlets of the outer projections are arranged to emit air towards the central portion of the grille.
Description
- The present invention relates to a diffuser for a hair dryer.
- A diffuser is known form of attachment for a hair dryer. The diffuser is attached to the airflow outlet end of the hair dryer and serves to reduce the velocity of the airflow emitted from the hair dryer before it is incident upon the hair of the user.
- A diffuser generally comprises a baffle and a grille connected to the baffle. The baffle has an air inlet end, an air outlet end which is larger than the air inlet end, and a tapering wall which extends between the air inlet end and the air outlet end. The air inlet end comprises an air inlet for receiving the airflow from the hair dryer. The wall of the baffle defines a diffusing air chamber within which the velocity of the airflow decreases as the cross-section of the air chamber increases. The grille is connected to the air outlet end of the diffuser and provides air outlets from which air is emitted from the diffuser. A set of projections or prongs are generally upstanding from the grille to contact the hair of the user during hair drying. Each of the projections generally has an air outlet for emitting air into the user's hair.
- The present invention provides a diffuser for attachment to an airflow outlet end of a hair dryer, the diffuser comprising at least one air inlet for receiving an airflow from a hair dryer; a grille comprising a central portion and a plurality of air outlets for emitting a first part of the airflow from the diffuser; and a plurality of projections upstanding from the grille for contacting the hair of a user and for emitting a second part of the airflow; wherein the plurality of projections comprise a set of inner projections arranged about the central portion of the grille, and a set of outer projections arranged about the inner projections, and wherein the air outlets of a first subset of inner projections are arranged to emit air away from the central portion of the grille and the air outlets of a second subset of inner projections are arranged to emit air towards the central portion of the grille, and the air outlets of the outer projections are arranged to emit air towards the central portion of the grille.
- Each of the projections preferably comprises an air inlet, an air outlet spaced from the air outlets of the grille, and a bore extending between the air inlet and the air outlet. Thus, a first part of the airflow which enters the diffuser through the air inlet(s) is emitted from the air outlets of the grille, whereas a second part of the airflow is emitted from the air outlets of the projections.
- Each projection preferably comprises a single air outlet. Each air outlet may comprise a single aperture, or a plurality of apertures which emit air in a common direction (that is, towards or away from the central portion of the grille), and which together define the air outlet. For example, the air outlet may comprise a mesh, grille or other array of relatively small apertures which together define the air outlet. As another example, the air outlet may comprise a plurality of apertures spaced along the projection, for example along the length of the projection, and which emit respective portions of the air received by the projection in a common direction.
- The longitudinal axes of the bores of the projections are preferably parallel to the longitudinal axis of the diffuser. The air inlet of each projection is located on an internal surface of the grille, and preferably has a size which is larger than that of each of the plurality of air outlets of the grille. For example, each projection preferably has an air inlet which is circular in shape, and has a diameter which is in the range from 3 to 15 mm.
- The air outlet of each projection is preferably located in an end portion of the projection which is remote from an external surface of the grille. The air outlet is preferably located on a side surface of the projection so that each projection emits a respective part of the airflow in a direction which is angled to the longitudinal axis of the diffuser. Each projection preferably has an air outlet which has a size which is larger than that of each of the plurality of air outlets of the grille. Each projection has a tip which is remote from the grille and a length extending in a direction extending from the grille to the tip. Each projection is preferably substantially conical or frustoconical in shape, so as to taper inwardly in a direction extending towards the air outlet end. Each air outlet of the projections preferably has a generally elongate shape; in other words, the length of the air outlet is greater than the width of the air outlet.
- In order to reduce the time required to dry hair using the diffuser, the air outlets of the projections are arranged to emit air in various directions. In a preferred embodiment, the projections are divided into inner projections and outer projections arranged about the inner projections. Preferably, the inner projections are arranged in an annular array. The inner projections are preferably arranged about some of the air outlets of the grille so that a portion of the second part of the airflow is emitted from those air outlets of the grille, following a flow path defined by the inner projections.
- The number of projections in the first subset of inner projections is preferably equal to the number of projections in the second subset of inner projections. A combination of the first subset and the second subset preferably forms the entirety of the inner projections. The inner projections may be arranged at equal angular intervals forming an annular array with angularly equidistant projections. As such, for each projection, the flow disturbance caused by the neighbouring projections may be kept to minimum and equally distributed along the annular array.
- Preferably, the first subset of inner projections and the second subset of inner projections are alternately arranged about the central portion of the grille, further improving the radially balanced distribution of air emitted by the inner projections towards and away from the central portion of the grille.
- The air outlets of the first subset of inner projections may be arranged to emit air radially away from the central portion of the grille and the air outlets of the second subset of inner projections may be arranged to emit air radially towards the central portion of the grille. With such an arrangement of inner projections, a vortex effect for improving heat convection and flow distribution can be created.
- Such an arrangement of inner projections can provide a balanced airflow velocity distribution proximate to the external surface of the grille by emitting air towards the centre of the diffuser as well as towards the outer periphery of the diffuser in substantially equal airflow rates. Accordingly, a more balanced airflow, without creating heat sinks or dead airflow regions adjacent to the external surface of the grille may be achieved. This is important for consistent heat treatment of hair without causing damage to the hair by excessive heat in certain regions of the diffuser surface when in use.
- Preferably, the outer projections are arranged in a second annular array. The outer projections are preferably arranged at equiangular intervals. The outlets of the outer projections may be arranged to emit air radially towards the central portion of the grille, thus creating a vortex effect. The second annular array formed by the outer projections is preferably concentric with the first annular array formed by the inner projections. Furthermore, the angular spacing between adjacent outer projections is preferably substantially the same as the angular spacing between adjacent inner projections. The concentric and regular arrangement of first and second annular arrays further assist in creating and maintaining balanced airflow along the surface of the diffuser.
- The plurality of projections may comprise a set of intermediary projections located between the inner projections and the outer projections. The intermediary projections may be arranged in a third annular array. Preferably, each of the intermediary projections comprises a single air outlet arranged to emit air towards the central portion of the grille. The air outlets of the intermediary projections may be arranged to emit air radially towards the central portion of the grille, thus creating a vortex effect.
- Preferably, the intermediary projections are angularly offset relative to the inner projections and the outer projections. With this arrangement, the flow path of the air emitted from the intermediary projections may not be directly obstructed by the air emitted from the inner projections. Furthermore, the air flow in corridors defined by the air emitted from the inner and outer projections may be stimulated by the intermediary projections, providing further balance to the airflow and heat distribution along the surface of the diffuser.
- The third annular array formed by the intermediary projections is preferably concentric with the second annular array formed by the outer projections and arranged within the area defined by the inner and outer projections. Preferably, the intermediary projections are located adjacent to the outer periphery of the diffuser, closer to the outer projections than to the inner projections.
- In a preferred embodiment, the outer periphery of the diffuser defines a scalloped outer edge. Accordingly, the scalloped edge provides the diffuser an ergonomic handling ability when in use and an aesthetically pleasing look. Furthermore, the depressions formed by the scalloped design along the periphery of the diffuser may improve visibility of hair when the diffuser is in use.
- The number of intermediary projections is preferably equal to the number of outer projections. Furthermore, the intermediary projections and outer projections may be alternately arranged about the central portion of the grille, at equal angular intervals. Such symmetrical arrangement may provide a further balanced airflow and heat distribution along the surface of the diffuser
- The central portion of the grille is preferably circular and unperforated. Accordingly, the air is emitted through air outlets arranged around this circular and unperforated area. The unperforated central portion of the diffuser may act as an obstacle to stop the airflow from directly exiting the diffuser along the same axis as it enters the diffuser.
- Accordingly, regions of increased airflow proximate to the central portion of the diffuser may be inhibited through a controlled direction of the airflow throughout the entirety of the diffuser.
- The diffuser preferably comprises a second unperforated area between the inner set of projections and the outer set of projections. The second unperforated area is preferably annular and concentric with the central portion of the grille. The second unperforated area may comprise an inner rim and an outer rim, wherein the outer rim is embossed with respect to the inner rim, creating a raised outer peripheral area, with respect to the central portion. Preferably, the raised outer peripheral area provides a base for the outer and intermediary projections.
- Preferred features of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:
-
FIG. 1 is a left side, front perspective view, from above, of a diffuser; -
FIG. 2 is a right side, rear perspective view, from above, of the diffuser; -
FIG. 3 is a top view of the diffuser; -
FIG. 4 is a side view of the diffuser; -
FIG. 5 is a bottom view of the diffuser; -
FIG. 6 is a left side, front exploded view of the diffuser; -
FIG. 7 is a right side, rear exploded view of the diffuser; -
FIG. 8 a is a side sectional view taken along line A-A inFIG. 3 ; -
FIG. 8 b is a side sectional view taken along line B-B inFIG. 3 ; and -
FIG. 9 is a left side, front perspective view, from above, of an example of a hair dryer to which the diffuser may be connected. -
FIGS. 1 to 5 are external views of adiffuser 10. The diffuser comprises anair inlet 12 for receiving an airflow from an airflow outlet end of a hair dryer. With reference also toFIGS. 6 and 7 , theair inlet 12 is generally annular in shape, and is in the form of an aperture located at theair inlet end 14 ofbaffle 16. Thebaffle 16 has anair outlet end 18 which is larger than theair inlet end 14, and an outwardly taperingwall 20 extending between theair inlet end 14 and theair outlet end 18. As illustrated inFIGS. 8 a and 8 b , the taperingwall 20 of thebaffle 16 defines a diffusingair chamber 22 through which the airflow passes within thediffuser 10. - The
baffle 16 comprises anannular inlet channel 24 for receiving airflow from theair inlet 12, and from which the airflow is emitted into theair chamber 22. Theair inlet channel 24 is defined by an annularinner wall 26 and arranged to emit air along the central longitudinal axis C of thediffuser 10 as illustrated inFIG. 4 , directly towards theair channel 22. Theair chamber 22 is further defined by anairflow dampener 28. - A
grille 30 is connected to the air outlet end 18 of thebaffle 16. Thegrille 30 is generally concave in shape. Thegrille 30 comprises air outlets from which a first part of airflow is emitted from thediffuser 10. These air outlets comprise a first array ofair outlets 32 which are located in a central annular region of thegrille 30, and a second array ofair outlets 34 which are located in a peripheral region of thegrille 30 which extends around the first array ofair outlets 32. Theair outlets air outlets air outlets air outlets grille 30 towards the external surface of thegrille 30. At the external surface, each of theair outlets air outlets grille 30 which is sharper than the perimeter defined by the internal surface of thegrille 30. The perimeter of the air outlets on the internal surface of thegrille 30 is preferably rounded, and has a curvature with a radius in the range from 0.2 to 0.4 mm. - Within each array, the
air outlets - With particular reference to
FIG. 3 , the first array ofair outlets 32 is arranged in a first annular array which extends around acentral portion 36 of the external surface of thegrille 30, and which receives airflow emitted from theannular inlet channel 24, along axis C through the central portion of theair chamber 22. The second array ofair outlets 34 is arranged in a second annular array which surrounds, and is concentric with, the first array ofair outlets 32. The second set ofair outlets 34 generally receives airflow emitted from theannular inlet channel 24, through the peripheral portion of theair chamber 22. - With reference to
FIGS. 3 and 8 a,central portion 36 of thegrille 30 defined by acircular periphery 38 between the longitudinal axis C and the first array ofair outlets 32 is devoid ofair outlets projections annular region 40 of thegrille 30, which is located between the arrays ofair outlets grille 30. Theannular region 40 is bounded by aninner rim 42 and anouter rim 44. Theouter rim 44 is embossed with respect to theinner rim 42. Accordingly, a raised outerperipheral area 46 is defined between theouter rim 44 and anexternal periphery 48 of thegrille 30 The surface of theannular region 40 is generally curved between theinner rim 42 and theouter rim 44 but this is not essential. For example, the external surface of theannular region 40 may be otherwise profiled or generally flat. - The
diffuser 10 also comprises a plurality of projections for contacting the hair of a user, and for emitting a second part of the airflow from thediffuser 10. The projections are upstanding from the external surface of thegrille 30. In this embodiment, the projections comprise a set ofinner projections 60, 62 a set ofouter projections 64 and a set ofintermediary projections 66. In this embodiment, the set ofouter projections 64 and the set ofintermediary projections 66 have the same size and shape. But alternatively, the projections may have different sizes. For example, the set ofinner projections outer projections 64 or the set ofintermediary projections 66. - The set of
inner projections central portion 36 of thegrille 30. In this embodiment, the set ofinner projections - The set of
inner projections inner projections 60 and a second subset ofinner projections 62. Each of the first subset ofinner projections 60 comprises anair inlet 68 formed in thegrille 30, anair outlet 70 and abore 72. Similarly, each of the second subset ofinner projections 62 comprises anair inlet 74 formed in thegrille 30, anair outlet 76 and abore 78. The air inlets 68, 74 are circular in shape, and have a diameter which is greater than the diameter of theair outlets grille 30. Theair outlets projections air outlets projections air outlets 70 of the first subset ofinner projections 60 are arranged to emit air away from thecentral portion 36 of thegrille 30, whereas theair outlets 76 of the second subset ofinner projections 62 are arranged to emit air towards thecentral portion 36 of thegrille 30. In this embodiment, theair outlets 70 of the first subset ofinner projections 60 are arranged to emit air radially outwardly, away from the longitudinal axis C of thediffuser 10. Theair outlets 76 of the second subset ofinner projections 62 are arranged to emit air radially inwardly, towards the longitudinal axis C of thediffuser 10. - The set of
outer projections 64 are arranged in an annular array amongst the second array ofair outlets 34, along the raised outerperipheral area 46 of thegrille 30. In this embodiment, the set ofouter projections 64 comprises ten projections which are equally angularly spaced about the longitudinal axis C. The set ofouter projections 64 are arranged such that each of the second subset ofinner projections 62 emits air towards a respective one of the set ofouter projections 64. Similar to the set ofinner projections outer projections 64 comprises anair inlet 80 formed in thegrille 30, anair outlet 82 and abore 84 for conveying air from theair inlet 80 to theair outlet 82. Theair outlets 82 of the set ofouter projections 64 are arranged to emit air towards thecentral portion 36 of thegrille 30, and are preferably arranged to emit air radially inwardly, towards the longitudinal axis C of thediffuser 10 so that each of the set ofouter projections 64 emits air towards a respective projection of the set ofinner projections - The intermediary set of
projections 66 are arranged in an annular array amongst the second array ofair outlets 34 of thegrille 34. In this embodiment, the intermediary set ofprojections 66 comprises ten projections which are equally angularly spaced about the longitudinal axis C. The intermediary set ofprojections 66 are arranged such that each of the intermediary set ofprojections 66 is angularly offset relative to the set ofinner projections outer projections 64. Similar to the set ofinner projections intermediary projections 66 comprises anair inlet 86 formed in thegrille 30, anair outlet 88, and abore 90 for conveying air from theair inlet 86 to theair outlet 88. Theair outlets 88 of the intermediary projections are arranged to emit air towards thecentral portion 36 of thegrille 30, preferably radially inwardly towards the longitudinal axis C of thediffuser 10, so that none of theintermediary projections 66 is located in the path of air emitted from the set ofinner projections outer projections 64. - The
airflow dampener 28 is located between thegrille 30 and thebaffle 16. Theairflow dampener 28 is in the form of a circular disc or plate which comprises of a fine mesh texture suitable for airflow reduction. As shown inFIGS. 8 a and 8 b , the periphery of theairflow dampener 28 is supported by aledge 92 formed on the internal surface of the taperingwall 20 of thebaffle 16. Theledge 92 is located generally midway between theair inlet end 14 and the air outlet end 18 of thebaffle 16. - As hot air flow passes through the
diffuser 10, the temperature of the taperingwall 20 of thebaffle 16 will rise. To shield the user from the taperingwall 20 of thebaffle 16, thediffuser 10 further comprises anexternal wall 100 which surrounds thebaffle 16 and thegrille 30. Theexternal wall 100 is generally frustoconical in shape and has a circularfirst end 102 and a circularsecond end 104 which is larger than thefirst end 102. - The
external wall 100 comprises a first set offastening elements 106 and a second set offastening elements 108 formed on the internal surface of theexternal wall 100, and which are connected to thebaffle 16 and thegrille 30 during assembly of thediffuser 10. The first set offastening elements 106 are arranged in a circular array and are equally angularly spaced about the longitudinal axis A of thediffuser 10. Furthermore, the first set offastening elements 106 are located generally midway between thefirst end 102 and thesecond end 104 of theexternal wall 100. The second set offastening elements 108 are arranged in a circular array and are equally angularly spaced about the longitudinal axis C of thediffuser 10. Furthermore, the second set offastening elements 108 are located generally midway between the first set offastening elements 106 and thesecond end 104 of theexternal wall 100. - The first set of
fastening elements 106 serve as a fastener connecting thebaffle 16 to theexternal wall 100 and as a spacer between thebaffle 16 and theexternal wall 100 defining a secondannular air chamber 110 therebetween. Thediffuser 10 comprises a plurality of ports which place theannular air chamber 110 in fluid communication with the ambient atmosphere. This can allow warm air to be conveyed out from theannular air chamber 110 during use of thediffuser 10, and allow cool air to enter theannular air chamber 110 following use of thediffuser 10. Afirst port 112 is located between thefirst end 102 of theexternal wall 100 and theair inlet end 14 of thebaffle 16. Asecond port 114 is located between thesecond end 104 of theexternal wall 100 and thegrille 30. - With reference to
FIGS. 6 and 7 , thediffuser 10 further comprises asealing ring 120 located between thegrille 30 and theairflow dampener 28. The sealingring 120 is in the form of an annular seal comprising at least one guiding means 122. The guiding means 122 provides guidance towards the correct assembly of the sealingring 120, reducing user error. In a preferred embodiment, there are at least two guiding means 122 along the periphery of the sealingring 120, spaced apart from each other. The sealingring 120 is preferably made from silicon rubber and its purpose is to prevent hot air from leaking between thegrille 30 and thebaffle 16. - With reference to
FIG. 7 , thebaffle 16 further comprises anRF ID slot 124 located at on the outer surface of theair inlet channel 24, suitable for receiving anRF ID tag 126. The purpose of theRF ID tag 126 is to alert a control circuit of ahair dryer 200 regarding the type of attachment, i.e.diffuser 10, being used. The control circuit of thehair dryer 200 may then adjust relevant settings such as air temperature and airflow rate accordingly. - Each of the components of the
diffuser 10 is formed from a plastic material. In this embodiment the components are formed from glass filled nylon. - To assembly the
diffuser 10, theairflow dampener 28 is first located within the baffle so that the perimeter of theairflow dampener 28 rests on theledge 92 of thebaffle 16. Theairflow dampener 28 comprises at least one guidingaperture 128. Preferably, in this embodiment theairflow dampener 28 comprises three guidingapertures 128. Thebaffle 16 comprisesassembly points 130 corresponding to the guidingaperture 128 positions of theairflow dampener 28. The sealingring 120 is then located along the air outlet end 18 of thebaffle 16. Preferable the internal curvature of the sealingring 120 corresponds to the peripheral curvature of the air outlet end 18 of thebaffle 16, allowing the sealingring 120 to rest on thebaffle 16. Thegrille 30 is then positioned on the air outlet end 18 of thebaffle 16, resting above the sealingring 120. The outer periphery of thegrille 30 further comprises maleangular alignment members 132 which are received by the guiding means 122 of the sealingring 120. The grille further comprisesfastening screw receptable 134 along theannular region 40 of thegrille 30. Accordingly, the alignment of maleangular alignment members 132 of thegrille 30 and the guiding means 122 of the sealingring 120, ensures the alignment offastening screw receptacle 134 of thegrille 30, guidingapertures 128 of theairflow dampener 28 and the assembly points 130 of thebaffle 16. Following the placement of thebaffle 16, theairflow dampener 28, the sealingring 120 and thegrille 30 on top of each other in accordance with the guidingapertures 128 of theairflow dampener 128, the fastening screws 142 are guided through the assembly points 130 of thebaffle 16 and guidingapertures 128 of theairflow dampener 28, and connected to thefastening screw receptacle 134 of thegrille 30. This connection of thegrille 30 to thebaffle 16 also results in theairflow dampener 28 and thesealing ring 120 becoming sandwiched between the baffle and thegrille 30 and forming asub-assembly 136. - The assembly of the
diffuser 10 is completed by securing the sub-assembly 136 to theexternal wall 100 using the first set offastening elements 106 and the second set offastening elements 108. A first set of circumferentially spacedmating elements 138 ofbaffle 16 engage with the first set offastening elements 106. A second set of circumferentially spacedmating elements 140 of thegrille 30 engage with the second set offastening elements 108. - In use the
diffuser 10 is attached to the airflow outlet end 202 of ahair dryer 200. For example thediffuser 10 may be attached to the hair dryer by amagnet 150 located at theair inlet end 14 of thebaffle 16.
Claims (20)
1. A diffuser for attachment to an airflow outlet end of a hair dryer, the diffuser comprising:
at least one air inlet for receiving an airflow from a hair dryer;
a grille comprising a central portion and a plurality of air outlets for emitting a first part of the airflow from the diffuser; and
a plurality of projections upstanding from the grille for contacting the hair of a user and for emitting a second part of the airflow, each of the projections comprising a single air outlet;
wherein the plurality of projections comprise a set of inner projections arranged about the central portion of the grille, and a set of outer projections arranged about the inner projections, and wherein the air outlets of a first subset of inner projections are arranged to emit air away from the central portion of the grille and the air outlets of a second subset of inner projections are arranged to emit air towards the central portion of the grille, and the air outlets of the outer projections are arranged to emit air towards the central portion of the grille.
2. The diffuser according to claim 1 , wherein the inner projections are arranged in an annular array.
3. The diffuser according to claim 1 , wherein the inner projections are arranged about some of the air outlets of the grille.
4. The diffuser according to claim 1 , wherein the number of projections in the first subset of inner projections is equal to the number of projections in the second subset of inner projections.
5. The diffuser according to claim 1 , wherein the inner projections are arranged at equiangular intervals.
6. The diffuser according to claim 1 , wherein the first subset of inner projections and the second subset of inner projections are alternately arranged about the central portion of the grille.
7. The diffuser according to claim 1 , wherein the air outlets of first subset of inner projections are arranged to emit air radially away from the central portion of the grille and the second subset of inner projections are arranged to emit air radially towards the central portion of the grille.
8. The diffuser according to claim 1 , wherein the outer projections are arranged in an annular array.
9. The diffuser according to claim 1 , wherein the set of inner projections and the set of outer projections are concentric.
10. The diffuser according to claim 1 , wherein the angular spacing between adjacent inner projections is substantially the same as the angular spacing between adjacent outer projections.
11. The diffuser according to claim 1 , wherein the outer projections are arranged at equiangular intervals.
12. The diffuser according to claim 1 , wherein the air outlets of the outer projections are arranged to emit air radially towards the central portion of the grille.
13. The diffuser according to claim 1 , comprising a set of intermediary projections located between the inner projections and the outer projections.
14. The diffuser according to claim 13 , wherein each of the intermediary projections comprises a single air outlet arranged to emit air towards the central portion of the grille.
15. The diffuser according to claim 14 , wherein the air outlets of the intermediary projections are arranged to emit air radially towards the central portion of the grille.
16. The diffuser according to claim 13 , wherein the intermediary projections are angularly offset relative to both the inner projections and the outer projections.
17. The diffuser according to claim 13 , wherein the intermediary projections are arranged in an annular array.
18. The diffuser according to claim 13 , wherein the number of intermediary projections is equal to the number of outer projections.
19. The diffuser according to claim 1 , wherein the outer projections are located adjacent to the outer periphery of the diffuser.
20. The diffuser according to claim 1 , wherein the central portion of the grille comprises a circular unperforated grille area.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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GB2020033.3A GB2602091B (en) | 2020-12-17 | 2020-12-17 | Diffuser |
GB2020033.3 | 2020-12-17 | ||
PCT/GB2021/052874 WO2022129847A1 (en) | 2020-12-17 | 2021-11-05 | Diffuser |
Publications (1)
Publication Number | Publication Date |
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US20230380567A1 true US20230380567A1 (en) | 2023-11-30 |
Family
ID=74221397
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/266,524 Pending US20230380567A1 (en) | 2020-12-17 | 2021-11-05 | Diffuser |
Country Status (4)
Country | Link |
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US (1) | US20230380567A1 (en) |
CN (1) | CN116648163A (en) |
GB (1) | GB2602091B (en) |
WO (1) | WO2022129847A1 (en) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4002944A1 (en) * | 1990-02-01 | 1991-08-14 | Braun Ag | HAIR DRYER |
JP3855435B2 (en) * | 1998-02-26 | 2006-12-13 | 松下電工株式会社 | Hair dryer |
DE202011003443U1 (en) * | 2011-03-02 | 2011-12-23 | Bego Medical Gmbh | Device for the generative production of three-dimensional components |
FR2982749B1 (en) * | 2011-11-22 | 2014-05-16 | Seb Sa | MONOBLOC DIFFUSER FOR HAIRDRYER |
USD715486S1 (en) * | 2013-01-09 | 2014-10-14 | Jemella Group Limited | Diffuser |
US9925723B2 (en) * | 2015-03-27 | 2018-03-27 | Delavan Inc. | Additive manufacturing systems and methods |
GB2539437B (en) * | 2015-06-16 | 2018-07-04 | Dyson Technology Ltd | Diffuser |
US10357827B2 (en) * | 2015-07-29 | 2019-07-23 | General Electric Comany | Apparatus and methods for production additive manufacturing |
WO2018111240A1 (en) * | 2016-12-13 | 2018-06-21 | Statasys, Inc. | Rotary silo additive manufacturing system |
CN109480440A (en) * | 2018-12-03 | 2019-03-19 | 深圳市深创电器有限公司 | A kind of fan housing of blower with diffusive gas flow function |
GB2581371B (en) * | 2019-02-14 | 2021-09-29 | Dyson Technology Ltd | Diffuser |
CN111166036A (en) * | 2020-03-13 | 2020-05-19 | 深圳奥郎格环保有限公司 | Diffuser and hair dryer |
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