CN112869327B - Air duct system of blower - Google Patents
Air duct system of blower Download PDFInfo
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- CN112869327B CN112869327B CN202110085388.XA CN202110085388A CN112869327B CN 112869327 B CN112869327 B CN 112869327B CN 202110085388 A CN202110085388 A CN 202110085388A CN 112869327 B CN112869327 B CN 112869327B
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- air
- blower
- air inlet
- air duct
- duct system
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- 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
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- 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
-
- 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
- A45D2200/00—Details not otherwise provided for in A45D
- A45D2200/20—Additional enhancing means
- A45D2200/202—Ionisation
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- Structures Of Non-Positive Displacement Pumps (AREA)
- Cleaning And Drying Hair (AREA)
Abstract
The invention provides an air duct system of a blower, comprising: a handle portion in which an air intake passage is formed; a wind tube part in which an air outlet passage is formed; the motor fan assembly is arranged in the handle part; the circuit board is arranged at the downstream of the air outlet end of the motor fan assembly in the handle part and divides the air inlet channel into at least two air channels; the air duct part is internally provided with a guide piece positioned at the communication part of the air outlet channel and the air inlet channel, and the guide piece is provided with a guide surface inclined relative to the air inlet channel and the air outlet channel so as to guide air flow in the double air ducts to enter the air outlet channel through the guide surface respectively. When the air flow blows to the guide piece from the double air channels, the guide piece is provided with a guide surface inclined relative to the air inlet channel and the air outlet channel, two air flows in the double air channels can be guided to enter the air outlet channel through the guide surfaces respectively, so that the coanda effect is formed, the air flow smoothly transits at the corners of the air channels, the effect of improving the wind force is achieved, and the air flow noise reduction effect is achieved.
Description
Technical Field
The invention relates to the field of hair care equipment, in particular to an air duct system of a hair dryer.
Background
The hair dryer is mainly used for drying and shaping hair, but can also be used for local drying, heating and physiotherapy in the aspects of laboratories, physiotherapy rooms, industrial production, artists and the like. The inside of the blower is usually provided with an electric heating wire, a motor and a fan, and the motor is directly used for driving the rotor to drive the fan blades to rotate, when the fan blades rotate, air is sucked from the air inlet, and centrifugal air flow formed by the air suction wire is blown out from the front mouth of the blower. When the air passes through, if the electric heating wire on the heating bracket in the tuyere is electrified and heated, hot air is blown out; if the selection switch does not electrify the heating wire to generate heat, the cold air is blown out. When the existing blower is in use, when the wind speed of the fan is high, howling phenomenon can be generated when the air is fed in and discharged out, and the noise of the blower is high; meanwhile, the heat productivity of the power device is large and the heat dissipation effect is poor because the rotating speed of the fan is high; in addition, with the continuous expansion of the application range of the blower, the wind power of the blower needs to be further improved.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides an air duct system of a blower, which has the advantages of reasonably designing the internal structure, reducing noise, improving the heat dissipation effect of a power device and improving wind power.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an air duct system of a blower, comprising:
a handle portion having an air inlet passage formed therein extending in a first direction;
an air duct part in which an air outlet passage extending in a second direction different from the first direction is formed, the air outlet passage communicating with the air inlet passage;
a motor fan assembly disposed within the handle portion;
the circuit board is arranged at the downstream of the air outlet end of the motor fan assembly in the handle part and extends along the length direction of the handle part so as to divide the air inlet channel into at least two air channels;
the air duct part is internally provided with a guide piece positioned at the communication part of the air outlet channel and the air inlet channel, and the guide piece is provided with a guide surface inclined relative to the first direction and the second direction so as to guide the air flow in the double air ducts to enter the air outlet channel through the guide surface respectively.
Preferably, the circuit board divides the air inlet channel into double air channels with equal cross sectional areas.
Preferably, the circuit board divides the air inlet channel into double air channels with unequal cross sectional areas.
Preferably, the central axis of the guide surface is located between the central axis of the handle portion and the central axis of the air duct portion.
Preferably, the air duct part comprises a first cylinder body and a second cylinder body, the first cylinder body and the second cylinder body are buckled with each other, and the air outlet channel is positioned in the first cylinder body.
Preferably, an inner cylinder is arranged in the second cylinder, the guide piece is sleeved on the inner cylinder, and the guide surface is an annular surface.
Preferably, the handle part further comprises an air inlet plate, the air inlet plate is inserted into the air inlet end of the handle part, a noise reduction interval is arranged between the air inlet plate and the air inlet end of the motor fan assembly, a plurality of through holes are formed in the air inlet plate, and the axis of each through hole is parallel to the axis of the handle part or is inclined relative to the axis of the handle part.
Preferably, the inner diameter of each through hole is 0.3-1.6mm, the distance between two adjacent through holes is 0.1-0.5mm, and the distance between the air inlet plate and the air inlet end of the motor fan assembly is 28-35mm.
Preferably, each through hole has an inner diameter of 0.6-1.2mm.
Preferably, the handle portion includes a first cover and a second cover, and the first cover and the second cover are mutually buckled.
Preferably, the tail end of the first cover body is provided with an inserting hole, the tail end of the second cover body is correspondingly provided with an inserting groove, the inner end of the air inlet plate is embedded into the inserting groove, and the outer end of the air inlet plate is positioned in the inserting hole.
Preferably, a notch is arranged at one corner of the outer end of the air inlet plate, and an auxiliary hole is arranged beside the notch; the outer wall of the first cover body is provided with a first barrier strip and a second barrier strip corresponding to the two sides of the inserting hole, the extension length of the first barrier strip is the same as the extension length of the outer end of the air inlet plate without the notch, the extension length of the second barrier strip is smaller than the extension length of the first barrier strip, and the auxiliary hole is exposed from the end part of the second barrier strip.
Preferably, a first silencing cotton installation area is arranged on the first cover body corresponding to the motor fan assembly and the air inlet plate, a second silencing cotton installation area is arranged on the second cover body corresponding to the motor fan assembly and the air inlet plate, and the first silencing cotton installation area and the second silencing cotton installation area are both used for installing silencing cotton.
Preferably, the motor fan assembly comprises a motor fan and a shock pad, the motor fan is arranged in the handle part, the fan blade of the motor fan faces the air inlet plate, the shock pad is wrapped on the outer side of the motor fan, the outer side surface of the shock pad is attached to the inner wall of the handle part, and the inner side surface of the shock pad is attached to the cylindrical side surface of the motor fan.
Preferably, the heating device further comprises a heating assembly, the heating assembly comprises a heat insulation support, a heater and a temperature sensor, the heat insulation support is arranged in the first cylinder, an annular air outlet is formed in the air outlet side of the heat insulation support, the heater is arranged on the heat insulation support, and the temperature sensor is arranged on one side, facing the air outlet, of the heater.
Preferably, the heat insulation support comprises a flow guide part, an inner pipe and a connecting piece, wherein the flow guide part is in a shape of a circular truncated cone side surface, the small-diameter end of the flow guide part faces the air outlet end of the first cylinder body, the connecting piece is connected between the small-diameter end of the flow guide part and the air outlet side end part of the inner pipe in the radial direction of the inner pipe, and the air inlet side end part of the inner pipe is in butt joint with the inner cylinder.
Preferably, the heater is sleeved on the inner tube, the heater comprises an inner ring, an outer ring, a connecting plate and a heating wire, the outer ring and the inner ring are coaxially arranged, the connecting plate is connected between the inner ring and the outer ring along the radial direction of the inner ring, and the heating wire is wound on the connecting plate along the circumferential direction of the inner ring in a bending shape.
Preferably, at least a first wire clamping hole and a second wire clamping hole are formed in the tail end of the handle portion, the first wire clamping hole and the second wire clamping hole are overlapped in the length direction of the handle portion, the axis of the first wire clamping hole and the axis of the second wire clamping hole are not overlapped, and a step-shaped wire clamping structure is formed at the transition position of the first wire clamping hole and the second wire clamping hole.
Preferably, the second wire clamping hole is located at the inner side of the first wire clamping hole, a wire distributing groove is further formed in the inner side of the handle portion corresponding to the inner side of the second wire clamping hole, wire distributing grooves are formed in two sides of the inner wall of the handle portion, and the wire distributing grooves on two sides are respectively communicated with the wire distributing groove.
Preferably, the air duct system of the blower further comprises a circuit board, wherein the circuit board is sleeved on the inner tube, and the circuit board is electrically connected with the circuit board.
Preferably, the air duct system of the blower further comprises a negative ion component, the negative ion component comprises a negative ion generator and a discharge end, the negative ion generator is arranged on the circuit board, and the discharge end extends to the air outlet.
Preferably, the air duct system of the blower further comprises a display assembly, the display assembly comprises a light emitting element and a light guide column, the light emitting element is arranged on the circuit board, the light guide column is arranged between the light emitting element and the second cylinder, and the thickness of the second cylinder at the corresponding position of the light guide column is thinned.
Preferably, the air duct system of the blower further comprises an adjusting assembly, the adjusting assembly comprises a key and a sealing gasket, the key is connected with the circuit board and is exposed from the second cylinder, and the sealing gasket is arranged at the contact position of the key and the second cylinder.
Preferably, the handle part further comprises a handle sleeve, and the handle sleeve is sleeved outside the first cover body and the second cover body.
Compared with the prior art, the invention has the beneficial effects that:
1. the circuit board divides the air inlet channel into double air channels, when air flows are blown to the guide piece from the double air channels, the guide piece is provided with a guide surface which is inclined relative to the air inlet channel and the air outlet channel, and can guide two air flows of the double air channels to enter the air outlet channel through the guide surface respectively to form a coanda effect, and the air flows smoothly transition at the corners of the air channels, so that the effect of improving wind power is achieved, and the air conditioner also has a noise reduction effect; in addition, if the air inlet channel is divided into uneven double air channels, the pressure of the air flow blown to the guide piece is inconsistent, and rotating air flow is formed in the air outlet channel, so that the wind power is further improved; the high-power device is arranged on the circuit board, and the air flow passing through the double air channels can radiate the power device, so that the radiating effect is good;
2. the tail end of the handle part is provided with an air inlet plate, the air inlet plate is provided with a plurality of through holes, and the noise of the blower in use can be effectively reduced by reasonably designing the inner diameter of the through holes, the distance between two adjacent through holes and the distance between the air inlet plate and the air inlet end of the motor blower; the air inlet plate can be made of a common PCB or other suitable materials, so that the manufacturing cost is low, and the manufacturing process is simple;
3. the air inlet plate adopts a plug-in structure, the first cover body of the handle part is provided with a plug-in hole, the second cover body is provided with a plug-in groove, and the air inlet plate can be accurately plugged in the tail end of the handle part; auxiliary holes on the air inlet plate are exposed, so that the air inlet plate is convenient to replace;
4. the first cover body is provided with a first silencing cotton installation area, and the second cover body is provided with a second silencing cotton installation area which is respectively used for installing silencing cotton and is beneficial to weakening noise transmission; the motor fan is wrapped with a shock pad to play a role in further reducing noise;
5. the tail end of the handle part is provided with the first wire clamping hole and the second wire clamping hole, the axis of the first wire clamping hole is not overlapped with the axis of the second wire clamping hole, and the transition part of the first wire clamping hole and the second wire clamping hole forms a step-shaped wire clamping structure, so that the power wire clamp can be fastened and fixed at the tail end of the handle part by utilizing the self structure of the handle part, the connection firmness of the power wire is improved, additional parts are avoided, and the production cost and the manufacturing procedure are saved.
Drawings
Fig. 1 is a schematic view showing the external structure of a blower according to embodiment 1 of the present invention;
fig. 2 is an exploded view of a blower according to embodiment 1 of the present invention;
fig. 3 is a schematic view showing the internal structure of a blower according to embodiment 1 of the present invention;
fig. 4 is a schematic view showing a structure of a blower according to embodiment 1 of the present invention with a front cover removed;
fig. 5 is an exploded view of a heating assembly of a blower according to embodiment 1 of the present invention;
fig. 6 is a schematic view showing an exploded structure of an air intake plate in a blower according to embodiment 1 of the present invention;
FIG. 7 is an enlarged view of the structure at A in FIG. 6;
fig. 8 is a schematic view showing a combined structure of an air intake plate in a blower according to embodiment 1 of the present invention;
fig. 9 is a schematic diagram of a wire clamping structure in a blower according to embodiment 1 of the present invention;
fig. 10 is an electrical schematic of a blower of the present invention;
fig. 11 is an electrical schematic of a heater in a hair dryer in accordance with the present invention;
fig. 12 is a schematic view showing a structure of a blower according to embodiment 2 of the present invention with a front cover removed;
fig. 13 is a simplified schematic diagram of a wire clamping structure in a blower according to embodiment 3 of the present invention;
fig. 14 is a simplified schematic diagram of a hair dryer according to embodiment 4 of the present invention.
In the figure, 100-blowers, 10-handle parts, 11-first cover bodies, 111-inserting holes, 112-first blocking strips, 113-second blocking strips, 114-first noise-reduction cotton installation areas, 12-second cover bodies, 121-inserting grooves, 122-second noise-reduction cotton installation areas, 13-air inlet covers, 14-filter screens, 15-air inlet plates, 151-through holes, 152-notches, 153-auxiliary holes, 16-first wire clamping holes, 17-second wire clamping holes, 18-handle sleeves, 191-wire dividing grooves, 192-wire distributing grooves, 20-air cylinder parts, 21-first cylinder bodies, 22-second cylinder bodies, 221-inner cylinders, 23-sealing rings and 31-circuit boards, 32-circuit board, 40-motor fan subassembly, 41-motor fan, 411-fan blade, 42-shock pad, 50-guide piece, 51-guide face, 60-heating component, 61-heat insulation support, 611-guide part, 412-inner tube, 413-connecting piece, 614-air outlet, 62-heater, 621-inner ring, 622-outer ring, 623-connecting plate, 624-heater wire, 63-temperature sensor, 64-fusing fuse, 70-anion component, 71-anion generator, 72-discharge end, 80-display component, 81-luminous element, 82-light guide column, 90-adjusting component, 91-button, 92-sealing pad.
Detailed Description
For a further understanding of the objects, construction, features, and functions of the invention, reference should be made to the following detailed description of the preferred embodiments.
Referring to fig. 1 to 3 in combination, fig. 1 is a schematic view illustrating an external structure of a blower according to embodiment 1 of the present invention; fig. 2 is an exploded view of a blower according to embodiment 1 of the present invention; fig. 3 is a schematic view showing the internal structure of a blower according to embodiment 1 of the present invention; the air duct system of the blower 100 of the present invention includes a handle portion 10, an air duct portion 20, a circuit board 31 and a motor fan assembly 40, wherein an air inlet channel extending along a first direction is formed in the handle portion 10; an air outlet channel extending along a second direction is formed in the air duct part 20, the second direction is different from the first direction, and the air outlet channel is communicated with the air inlet channel; the motor fan assembly 40 is arranged in the handle part 10 and is used for providing power to enable external air flow to enter the handle part 10; the circuit board 31 is disposed in the handle portion 10 downstream of the air outlet end of the motor fan assembly 40 and extends along the length direction of the handle portion 10 to divide the air inlet channel into at least two air channels; the duct part 20 is provided therein with a guide member 50 located at a position where the air outlet passage communicates with the air inlet passage, the guide member 50 having a guide surface 51 inclined with respect to the first direction and the second direction to guide the air flow in the double duct to enter the air outlet passage through the guide surface 51, respectively. Wherein the central axis of the guide surface 51 is sandwiched between the central axis of the handle portion 10 and the central axis of the wind tunnel portion 20. Preferably, the guiding surface 51 is a concave arc surface, when the air flows are blown to the guiding piece 50 from the double air channels, the guiding surface 51 can guide two air flows of the double air channels to enter the air outlet channel through the guiding surface 51 respectively, so as to form a coanda effect, and the air flows smoothly transition at the corners of the air channels, so that the effect of improving the wind power can be achieved, and the noise reduction effect is achieved.
Referring to fig. 4, fig. 4 is a schematic view of a blower according to embodiment 1 of the present invention with a front cover removed; in embodiment 1 of the invention, the circuit board 31 is centrally arranged in the handle portion 10, the circuit board 31 divides the air inlet channel into two air channels with equal cross-sectional areas, two air flows with equal sizes in the two air channels respectively enter the air outlet channel through the guide surface 51, and the air flows smoothly transition at the corners of the air channels, so that the effects of improving wind power and reducing noise can be achieved. The high-power device is arranged on the circuit board 31, and the air flow passing through the double air channels can radiate the power device, so that the radiating effect is good.
In the actual production process, in order to facilitate the assembly and disassembly of the internal parts, the handle part 10 and the air duct part 20 can be respectively formed by buckling a plurality of cover bodies or cylinder bodies; in embodiment 1 of the present invention, the handle portion 10 includes a first cover 11, a second cover 12 and a handle sleeve 18, wherein the first cover 11 and the second cover 12 are fastened together, and an air inlet channel is formed therein for installing a motor fan assembly 40 and a circuit board 31; the handle sleeve 18 is sleeved outside the first cover body 11 and the second cover body 12, and is used for improving the connection firmness of the handle part 10 and improving the attractiveness; the air duct part 20 comprises a first cylinder 21, a second cylinder 22 and a sealing ring 23, wherein the first cylinder 21 and the second cylinder 22 are mutually buckled, and the sealing ring 23 is arranged at the buckling position of the first cylinder 21 and the second cylinder 22 and is used for enhancing the connection firmness and the tightness. It should be noted that this embodiment is only one embodiment of the present invention, and in other examples, the specific structures of the handle portion 10 and the wind tunnel portion 20 may be appropriately set according to the actual situation.
Referring to fig. 2 and 3, an air inlet cover 13 and a filter screen 14 are disposed at an air inlet end of the handle portion 10, the filter screen 14 is disposed at an inner side of the air inlet cover 13 and is used for filtering air flow entering the air inlet channel, filtering impurities in the air flow, avoiding blockage of impurities and prolonging service life of the blower.
In addition, in embodiment 1 of the present invention, the included angle between the central axis of the first cylinder 21 and the central axis of the handle portion 10 is 93 °, which meets the ergonomic requirement and is convenient for hand holding. The second cylinder 22 is internally provided with an inner cylinder 221, the guide piece 50 is sleeved on the inner cylinder 221, the guide surface 50 is an annular surface 51, and the guide surface 51 can guide two air flows of the double air channels to enter the air outlet channel through the guide surface 51 respectively.
In embodiment 1 of the present invention, the handle portion 10 further includes an air inlet plate 15, please refer to fig. 4, 6 and 7 in combination, fig. 4 is a schematic diagram of a structure of the blower according to embodiment 1 with a front cover removed; fig. 6 is a schematic view showing an exploded structure of an air intake plate in a blower according to embodiment 1 of the present invention; FIG. 7 is an enlarged view of the structure at A in FIG. 6; the air inlet plate 15 is inserted into the air inlet end of the handle portion 10, a noise reduction space is arranged between the air inlet plate 15 and the air inlet end of the motor fan assembly 40, a plurality of through holes 151 are formed in the air inlet plate 15, and the axis of each through hole 151 is parallel to the axis of the handle portion 10 or inclined relative to the axis of the handle portion 10. In embodiment 1 of the present invention, the axis of the through hole 151 is parallel to the axis of the handle portion 10, and in other embodiments, the axis direction of the through hole 151 may be set appropriately according to the actual situation. Wherein, the inner diameter r of each through hole 151 is 0.3-1.6mm, the interval between two adjacent through holes 151 is 0.1-0.5mm, and the distance h between the air inlet plate 15 and the air inlet end of the motor fan assembly 50 is 28-35mm. When the fan blades in the motor fan assembly 40 rotate, external air sequentially passes through the air inlet cover 13, the filter screen 14 and the through holes 151 on the air inlet plate 15 to enter the air inlet channel, and through reasonably designing the inner diameter of the through holes 151, the distance between two adjacent through holes 151 and the distance between the air inlet plate 15 and the air inlet end of the motor fan assembly 40 (namely the noise reduction distance), the noise of the blower 100 in use can be effectively reduced, and the howling phenomenon is avoided; the air inlet plate 15 can be made of a common PCB or other suitable materials, and has low manufacturing cost and simple manufacturing process. Through a plurality of reasonable tests, the inner diameter r of each through hole 151 is preferably designed to be 0.6-1.2mm, and the noise reduction effect is good.
Since many fine dust impurities exist in the air and the diameter of the through hole 151 on the air inlet plate 15 is small, the phenomenon that the through hole is blocked is unavoidable when the blower 100 is used for a while, and thus, the air inlet plate 15 needs to be replaced. Referring to fig. 6 to 8 in combination, fig. 6 is a schematic diagram showing an exploded structure of an air intake plate in a blower according to embodiment 1 of the present invention; FIG. 7 is an enlarged view of the structure at A in FIG. 6; fig. 8 is a schematic view showing a combined structure of an air intake plate in a blower according to embodiment 1 of the present invention; in order to realize the rapid replacement function of the air inlet plate 15, the tail end of the first cover body 11 is provided with an inserting hole 111, the tail end of the second cover body 12 is correspondingly provided with an inserting groove 121, the inner end of the air inlet plate 15 is embedded into the inserting groove 121, and the outer end of the air inlet plate 15 is positioned in the inserting hole 111. Further, a notch 152 is arranged at one corner of the outer end of the air inlet plate 15, and an auxiliary hole 153 is arranged beside the notch 152; the first blocking strip 112 and the second blocking strip 113 are arranged on two sides of the outer wall of the first cover body 11 corresponding to the inserting hole 111, the extending length of the first blocking strip 112 is the same as the extending length of the outer end of the air inlet plate 15 without the notch 152, the extending length of the second blocking strip 113 is smaller than that of the first blocking strip 112, and the auxiliary hole 153 is exposed from the end portion of the second blocking strip 113. The notch 152 serves as a fool-proof feature, and facilitates quick identification of the direction of insertion by an operator when the air inlet plate 15 is replaced. When the air inlet plate 15 needs to be replaced, as the auxiliary hole 153 is exposed from the end part of the second barrier strip 113, an operator can penetrate into the auxiliary hole 153 by using a tool to pull out the air inlet plate 15 which needs to be replaced, and then insert a new air inlet plate 15, so that the replacement process is simple and quick.
Preferably, the inner end of the air inlet plate 15 is arc-shaped, and the inner end structure of the air inlet plate 15 is matched with the structure of the inserting groove 121; the outer end of the air inlet plate 15 is arc-shaped, and the outline of the outer end of the air inlet plate 15 is matched with the arc outlines of the first barrier strip 112 and the second barrier strip 113.
Referring to fig. 2 or 4, the motor fan assembly 40 includes a motor fan 41 and a damper pad 42, the motor fan 41 is disposed in the handle portion 10, a fan blade 411 of the motor fan 41 faces the air inlet plate 15, the damper pad 42 is wrapped on the outer side of the motor fan 41, the outer side surface of the damper pad 42 is attached to the inner wall of the handle portion 10, and the inner side surface of the damper pad 42 is attached to the cylindrical side surface of the motor fan 41. The shock pad 42 is made of silica gel, so that noise generated in the operation of the motor fan 41 can be eliminated, and air inlet and air outlet howling can be relieved.
Referring to fig. 2, fig. 4 and fig. 6 in combination, a first silencing cotton mounting area 114 is disposed on the first cover 11 corresponding to the motor fan assembly 40 and the air inlet plate 15, a second silencing cotton mounting area 122 is disposed on the second cover 12 corresponding to the motor fan assembly 40 and the air inlet plate 15, and the first silencing cotton mounting area 114 and the second silencing cotton mounting area 122 are both used for mounting silencing cotton, so as to achieve the effect of further noise reduction.
The blower 100 further includes a heating element 60, referring to fig. 2 and 5, fig. 5 is an exploded view of the heating element in the blower according to embodiment 1 of the present invention; the heating assembly 60 comprises a heat insulation support 61, a heater 62 and a temperature sensor 63, the heat insulation support 61 is arranged in the first cylinder 21, an annular air outlet 614 is arranged on the air outlet side of the heat insulation support 61, the heater 62 is arranged on the heat insulation support 61, and the temperature sensor 63 is arranged on one side of the heater 62 facing the air outlet 614. Specifically, the heat insulation support 61 includes a guiding part 611, an inner tube 612 and a connecting piece 613, the guiding part 611 is in a shape of a circular truncated cone, a small diameter end of the guiding part 611 faces an air outlet end of the first cylinder 21, the connecting piece 613 is connected between the small diameter end of the guiding part 611 and the air outlet end of the inner tube 612 along a radial direction of the inner tube 612, the air inlet end of the inner tube 612 is in butt joint with the inner tube 221, and the inner tube 612 defines an air outlet channel as an annular air channel; the heater 62 is sleeved on the inner tube 612, the heater 62 comprises an inner ring 621, an outer ring 622, a connecting plate 623 and a heating wire 624, the outer ring 622 and the inner ring 621 are coaxially arranged, the connecting plate 623 is connected between the inner ring 621 and the outer ring 622 along the radial direction of the inner ring 621, and the heating wire 624 is wound on the connecting plate 623 along the circumferential direction of the inner ring 621 in a bending shape. In the working process of the blower 100, the heating wire 624 is electrified to generate heat, so as to heat the air flow in the air outlet channel, and the heated air flow is blown out from the air outlet 614, thereby realizing the functions of drying hair, shaping and the like. The temperature sensor 63 can detect the air flow temperature at the air outlet 614, so that the user can conveniently obtain the blowing temperature.
The heating assembly 60 further comprises a fusing fuse 64, the fusing fuse 64 is arranged on the air outlet side of the outer ring 622 and the inner ring 621, the fusing fuse 64 is connected with the heating wire 624 in series, and the functions of short-circuit protection and overcurrent protection are achieved, so that the use safety of the blower is guaranteed.
In the prior art, the power cord is generally fixed to the tail end of the blower handle through additional parts such as a claw, a clamping seat and the like, so that the production cost and the manufacturing procedure are increased, and the additional storage space and management of the parts are also required. Therefore, the invention improves the handle structure of the blower and utilizes the structure to clamp and fix the power line. Referring to fig. 9, fig. 9 is a schematic diagram illustrating a wire clamping structure in a blower according to embodiment 1 of the present invention; the end of the handle portion 10 is provided with at least a first wire clamping hole 16 and a second wire clamping hole 17, the first wire clamping hole 16 and the second wire clamping hole 17 are overlapped in the length direction of the handle portion 10, the axis of the first wire clamping hole 16 and the axis of the second wire clamping hole 17 are not overlapped, and a step-shaped wire clamping structure is formed at the transition part of the first wire clamping hole 16 and the second wire clamping hole 17. Therefore, the power cord can be fastened to the tail end of the handle portion 10 by using the structure of the handle portion 10, so that the connection firmness of the power cord is improved, and meanwhile, extra parts are avoided, and the production cost and the manufacturing procedure are saved. The corners of the step-shaped wire clamping structure are in smooth transition, so that the power wire can be prevented from being scratched.
In embodiment 1 of the present invention, the inner diameter of the first wire clamping hole 16 is equal to the inner diameter of the second wire clamping hole 17, the central axes of the first wire clamping hole 16 and the second wire clamping hole 17 are parallel to each other and are parallel to the central axis of the handle portion 10, the second wire clamping hole 17 is located at the inner side of the first wire clamping hole 16, a wire dividing groove 191 is arranged in the inner side of the handle portion 10 corresponding to the inner side of the second wire clamping hole 17, wire routing grooves 192 are arranged at two sides of the inner wall of the handle portion 10, and the wire routing grooves 192 at two sides are respectively communicated with the wire dividing groove 191. The power line is clamped at the wire clamping structure formed by the first wire clamping hole 16 and the second wire clamping hole 17, the power line is separated at the wire separating groove 191, a plurality of separated wires are respectively routed through the wire grooves 192 on two sides, and the heating assembly 60 and the motor fan assembly 40 are electrically connected with the circuit board 31 through the wires, so that the electric control of the blower 100 is realized. The design of the wiring grooves 191 and 192 is convenient for quick wiring, and can improve the internal cleanliness of the blower.
Referring to fig. 2, in embodiment 1 of the present invention, the blower 100 further includes a circuit board 32, the circuit board 32 is disposed in the second cylinder 22, the circuit board 32 is annular and sleeved on the inner tube 221, and the circuit board 32 is electrically connected to the circuit board 31. In actual assembly, components with high power and high heat are mounted on the circuit board 31, and the high-power components are radiated by utilizing the air flow of the double air channels; some components with low heat productivity can be mounted on the circuit board 32, and natural heat dissipation is performed by using the ambient temperature. However, the present invention is not limited thereto, and in other embodiments, only one circuit board for dividing the air inlet channel into two air channels may be provided, and all necessary electronic components are mounted on the circuit board.
Referring to fig. 2, the blower 100 further includes a negative ion assembly 70, the negative ion assembly 70 includes a negative ion generator 71 and a discharge end 72, the negative ion generator 71 is disposed on the circuit board 32, and the discharge end 72 extends to the air outlet 614. The negative ions emitted from the discharge end 72 of the negative ion generator 71 are blown out from the air outlet 614 along with the heated air flow, so that static electricity generated by hair can be neutralized, and the effect of smoothing the hair can be achieved. The discharge end 72 is preferably a carbon brush, which can enhance the negative ion emission effect.
Referring to fig. 2, the blower 100 further includes a display assembly 80, where the display assembly 80 includes a light emitting element 81 and a light guiding column 82, the light emitting element 81 is disposed on the circuit board 32, the light guiding column 82 is disposed between the light emitting element 81 and the second cylinder 22, and the thickness of the second cylinder 22 corresponding to the light guiding column 82 is reduced. In use, the light guide column 82 can transmit the light generated by the light emitting element 81 to the corresponding position of the second cylinder 82, so that the user can know the working state of the blower 100 conveniently. For example, the light emitting element 81 may be an LED chip, and the light guide 82 may be configured to be matched with the LED chip, and may be used to display the operating temperature of the blower 100. The light emitting element 81 may also employ diodes of different colors, such as red and blue, for displaying the hot air blowing and cold air blowing states, respectively. The thickness of the second barrel 22 at the corresponding position of the light guide column 82 is thinned, so that light can pass through, the data display function can be skillfully realized, the through hole for installing a display screen can be prevented from being formed in the shell, the production process is saved, the process cost is reduced, the structural strength can be improved, and the waterproof and dustproof effects are improved.
Referring to fig. 2, the blower 100 further includes an adjusting assembly 90, where the adjusting assembly 90 includes a key 91 and a sealing pad 92, the key 91 is connected with the circuit board 32 and is exposed from the second cylinder 22, and a user can use the key 91 to adjust an operation parameter of the blower 100, such as a parameter for adjusting a temperature, a wind speed, and the like; the gasket 92 is provided at the contact portion between the key 91 and the second cylinder 22 for enhancing the sealing property.
Referring to fig. 2, 10 and 11 in combination, fig. 10 is an electrical schematic diagram of a blower according to the present invention; fig. 11 is an electrical schematic of a heater in a hair dryer in accordance with the present invention; in fig. 10, high-power devices such as an MCU controller and an inverter are disposed on a circuit board 31, and low-power devices such as an inductor, a capacitor, a rectifier bridge and a switching power supply are disposed on a circuit board 32; the motor fan 41 is electrically connected with the circuit board 31, and the motor fan 41 works to enable external air to enter the air inlet channel; the heating wire 624 in the heater 62 is electrically connected with the circuit board 32 and is used for heating the air flow in the air outlet channel; the temperature sensor 63 detects the temperature of the air outlet and feeds the temperature back to the MCU controller; the negative ions generated by the negative ion generator 71 are emitted to the air outlet through the discharge end 72, and the effect of smoothing hair is achieved. In fig. 11, a temperature control switch corresponds to a button 91, which can be used to adjust the heating temperature; the thermal fuse corresponds to the fuse 64, the heating element corresponds to the heating wire 624, and the fuse 64 is connected in series with the heating wire 624 for circuit protection.
Referring to fig. 12, fig. 12 is a schematic view showing a structure of a blower according to embodiment 2 of the present invention with a front cover removed; in embodiment 2 of the invention, the circuit board 31 is arranged in the handle part in an offset manner, the circuit board 31 divides the air inlet channel into double air channels with unequal cross sectional areas, two air flows with unequal flow rates in the double air channels respectively enter the air outlet channel through the guide surface 51, and the air flows smoothly transition at the corners of the air channels, so that the effects of improving wind power and reducing noise are achieved. Meanwhile, since the two air flows in the double air channels are not equal, the pressure of the two air flows blown to the guide surface 61 is not uniform, and therefore, rotating air flows are formed in the air outlet channel, and the wind power is further improved.
Referring to fig. 13, fig. 13 is a simplified schematic diagram of a wire clamping structure in a blower according to embodiment 3 of the present invention; in embodiment 3 of the present invention, the end of the handle portion 10 is provided with the first wire clamping hole 16 and the second wire clamping hole 17, the first wire clamping hole 16 and the second wire clamping hole 17 are overlapped in the length direction of the handle portion 10, the central axis of the first wire clamping hole 16 and the central axis of the second wire clamping hole 17 incline in the same direction, a step-shaped wire clamping structure is formed at the transition position of the first wire clamping hole 16 and the second wire clamping hole 17, and all corners of the step-shaped wire clamping structure are in smooth transition, so that the power wire is prevented from being scratched.
Referring to fig. 14, fig. 14 is a simplified schematic diagram of a wire clamping structure in a blower according to embodiment 4 of the present invention; in embodiment 4 of the present invention, the end of the handle portion 10 is provided with the first wire clamping hole 16 and the second wire clamping hole 17, the first wire clamping hole 16 and the second wire clamping hole 17 are overlapped in the length direction of the handle portion 10, the central axis of the first wire clamping hole 16 and the central axis of the second wire clamping hole 17 are reversely inclined, a step-shaped wire clamping structure is formed at the transition part of the first wire clamping hole 16 and the second wire clamping hole 17, and corners of the step-shaped wire clamping structure are smoothly transited to avoid scratching a power wire.
In other embodiments, the wire clamping structure can be reasonably designed according to practical situations, so long as the self structure of the handle part can be utilized to realize the clamping and fixing functions of the power wire.
In summary, the present invention provides an air duct system of a blower, in which an air inlet channel is divided into two air ducts by a circuit board, when an air flow blows from the two air ducts to a guide member, the guide member has a guide surface inclined relative to the air inlet channel and an air outlet channel, and can guide two air flows of the two air ducts to enter the air outlet channel through the guide surfaces respectively, so as to form a coanda effect, and the air flows smoothly transition at corners of the air ducts, so as to achieve an effect of improving wind power, and also have a noise reduction effect; in addition, if the air inlet channel is divided into uneven double air channels, the pressure of the air flow blown to the guide piece is inconsistent, and rotating air flow is formed in the air outlet channel, so that the wind power is further improved; the high-power device is arranged on the circuit board, and the air flow passing through the double air channels can radiate the power device, so that the radiating effect is good; the tail end of the handle part is provided with an air inlet plate, the air inlet plate is provided with a plurality of through holes, and the noise of the blower in use can be effectively reduced by reasonably designing the inner diameter of the through holes, the distance between two adjacent through holes and the distance between the air inlet plate and the air inlet end of the motor blower; the air inlet plate can be made of a common PCB or other suitable materials, so that the manufacturing cost is low, and the manufacturing process is simple; the air inlet plate adopts a plug-in structure, the first cover body of the handle part is provided with a plug-in hole, the second cover body is provided with a plug-in groove, and the air inlet plate can be accurately plugged in the tail end of the handle part; auxiliary holes on the air inlet plate are exposed, so that the air inlet plate is convenient to replace; the first cover body is provided with a first silencing cotton installation area, and the second cover body is provided with a second silencing cotton installation area which is respectively used for installing silencing cotton and is beneficial to weakening noise transmission; the motor fan is wrapped with a shock pad to play a role in further reducing noise; the tail end of the handle part is provided with the first wire clamping hole and the second wire clamping hole, the axis of the first wire clamping hole is not overlapped with the axis of the second wire clamping hole, and the transition part of the first wire clamping hole and the second wire clamping hole forms a step-shaped wire clamping structure, so that the power wire clamp can be fastened and fixed at the tail end of the handle part by utilizing the self structure of the handle part, the connection firmness of the power wire is improved, additional parts are avoided, and the production cost and the manufacturing procedure are saved.
The invention has been described with respect to the above-described embodiments, however, the above-described embodiments are merely examples of practicing the invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (21)
1. An air duct system of a blower, characterized by: comprising the following steps:
a handle portion having an air inlet passage formed therein extending in a first direction;
an air duct part in which an air outlet passage extending in a second direction different from the first direction is formed, the air outlet passage communicating with the air inlet passage;
a motor fan assembly disposed within the handle portion;
the circuit board is arranged at the downstream of the air outlet end of the motor fan assembly in the handle part and extends along the length direction of the handle part so as to divide the air inlet channel into at least two air channels;
the air duct part is internally provided with a guide piece positioned at the communication part of the air outlet channel and the air inlet channel, and the guide piece is provided with a guide surface inclined relative to the first direction and the second direction so as to guide the air flow in the double air ducts to enter the air outlet channel through the guide surface respectively; the guide surface is a concave arc surface, and the central axis of the guide surface is positioned between the central axis of the handle part and the central axis of the air duct part;
the air duct part comprises a first cylinder body and a second cylinder body, the first cylinder body and the second cylinder body are buckled with each other, and the air outlet channel is positioned in the first cylinder body; an inner cylinder is arranged in the second cylinder body, the guide piece is sleeved on the inner cylinder, and the guide surface is an annular surface;
when the air flow blows from the double air channels to the guide piece, the guide surface guides the air flow of the double air channels to enter the air outlet channel through the guide surface respectively, so that the coanda effect is formed, and the air flow smoothly transits at the corners of the air channels.
2. The air duct system of the blower of claim 1, wherein: the circuit board divides the air inlet channel into double air channels with equal cross sectional areas.
3. The air duct system of the blower of claim 1, wherein: the circuit board divides the air inlet channel into double air channels with unequal cross sectional areas.
4. The air duct system of the blower of claim 1, wherein: the handle part further comprises an air inlet plate, the air inlet plate is inserted into the air inlet end of the handle part, a noise reduction interval is arranged between the air inlet plate and the air inlet end of the motor fan assembly, a plurality of through holes are formed in the air inlet plate, and the axis of each through hole is parallel to the axis of the handle part or is inclined relative to the axis of the handle part.
5. The air duct system of the blower of claim 4, wherein: the inner diameter of each through hole is 0.3-1.6mm, the distance between every two adjacent through holes is 0.1-0.5mm, and the distance between the air inlet plate and the air inlet end of the motor fan assembly is 28-35mm.
6. The air duct system of the blower of claim 5, wherein: the inner diameter of each through hole is 0.6-1.2mm.
7. The air duct system of the blower of claim 5, wherein: the handle part comprises a first cover body and a second cover body, and the first cover body and the second cover body are mutually buckled.
8. The air duct system of the blower of claim 7, wherein: the tail end of the first cover body is provided with an inserting hole, the tail end of the second cover body is correspondingly provided with an inserting groove, the inner end of the air inlet plate is embedded into the inserting groove, and the outer end of the air inlet plate is positioned in the inserting hole.
9. The air duct system of the blower of claim 8, wherein: a notch is formed in one corner of the outer end of the air inlet plate, and an auxiliary hole is formed beside the notch; the outer wall of the first cover body is provided with a first barrier strip and a second barrier strip corresponding to the two sides of the inserting hole, the extension length of the first barrier strip is the same as the extension length of the outer end of the air inlet plate without the notch, the extension length of the second barrier strip is smaller than the extension length of the first barrier strip, and the auxiliary hole is exposed from the end part of the second barrier strip.
10. The air duct system of the blower of claim 7, wherein: the motor fan assembly with correspond between the air inlet board be equipped with first amortization cotton installation zone on the first lid, the motor fan assembly with correspond between the air inlet board be equipped with second amortization cotton installation zone on the second lid, first amortization cotton installation zone the cotton installation zone of second amortization all is used for installing amortization cotton.
11. The air duct system of the blower of claim 4, wherein: the motor fan assembly comprises a motor fan and a shock pad, the motor fan is arranged in the handle portion, the fan blades of the motor fan face the air inlet plate, the shock pad wraps the outer side of the motor fan, the outer side face of the shock pad is attached to the inner wall of the handle portion, and the inner side face of the shock pad is attached to the cylindrical side face of the motor fan.
12. The air duct system of the blower of claim 1, wherein: still include heating element, heating element includes thermal-insulated support, heater and temperature sensor, thermal-insulated support is located the inside of first barrel, the air-out side of thermal-insulated support is equipped with annular air outlet, the heater is located on the thermal-insulated support, temperature sensor locates the heater orientation one side of air outlet.
13. The air duct system of the blower of claim 12, wherein: the heat insulation support comprises a flow guide part, an inner pipe and a connecting piece, wherein the flow guide part is in a shape of a circular truncated cone side surface, the small-diameter end of the flow guide part faces the air outlet end of the first cylinder body, the connecting piece is connected between the small-diameter end of the flow guide part and the air outlet side end part of the inner pipe in the radial direction of the inner pipe, and the air inlet side end part of the inner pipe is in butt joint with the inner cylinder.
14. The air duct system of the blower of claim 13, wherein: the heater cover is located on the inner tube, the heater includes inner circle, outer lane, connecting plate and heater strip, the outer lane with the coaxial setting of inner circle, the connecting plate is followed the radial of inner circle connect in the inner circle with between the outer lane, the heater strip is crooked form edge the circumference of inner circle twine in on the connecting plate.
15. The air duct system of the blower of claim 1, wherein: the tail end of the handle part is provided with at least a first wire clamping hole and a second wire clamping hole, the first wire clamping hole and the second wire clamping hole are overlapped in the length direction of the handle part, the axis of the first wire clamping hole and the axis of the second wire clamping hole are not overlapped, and a step-shaped wire clamping structure is formed at the transition part of the first wire clamping hole and the second wire clamping hole.
16. The air duct system of the blower of claim 15, wherein: the second wire clamping hole is positioned at the inner side of the first wire clamping hole, a wire dividing groove is further formed in the handle portion corresponding to the inner side of the second wire clamping hole, wire grooves are formed in two sides of the inner wall of the handle portion, and the wire grooves on two sides are respectively communicated with the wire dividing groove.
17. The air duct system of the blower of claim 13, wherein: the air duct system of the blower further comprises a circuit board, wherein the circuit board is sleeved on the inner tube and is electrically connected with the circuit board.
18. The air duct system of the blower of claim 17, wherein: the air duct system of the blower further comprises an anion component, the anion component comprises an anion generator and a discharge end, the anion generator is arranged on the circuit board, and the discharge end extends to the air outlet.
19. The air duct system of the blower of claim 17, wherein: the air duct system of the blower further comprises a display assembly, the display assembly comprises a light emitting element and a light guide column, the light emitting element is arranged on the circuit board, the light guide column is arranged between the light emitting element and the second cylinder, and the thickness of the second cylinder at the corresponding position of the light guide column is reduced.
20. The air duct system of the blower of claim 17, wherein: the air duct system of the blower further comprises an adjusting assembly, the adjusting assembly comprises a key and a sealing gasket, the key is connected with the circuit board and is exposed from the second barrel, and the sealing gasket is arranged at the contact position of the key and the second barrel.
21. The air duct system of the blower of claim 1, wherein: the handle part further comprises a handle sleeve, and the handle sleeve is sleeved outside the first cover body and the second cover body.
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| CN202011570083X | 2020-12-26 | ||
| CN202011570083 | 2020-12-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2409158A (en) * | 2003-12-18 | 2005-06-22 | Freedom Innovations Ltd | Cordless hairdryer with baffles |
| GB2503687B (en) * | 2012-07-04 | 2018-02-21 | Dyson Technology Ltd | An attachment for a hand held appliance |
| KR101932158B1 (en) * | 2017-08-03 | 2018-12-26 | 김창기 | Hair dryer |
| CN107259762A (en) * | 2017-08-11 | 2017-10-20 | 浙江金达电机电器有限公司 | Wind Volume hair-dryer |
| CN111528606A (en) * | 2019-02-07 | 2020-08-14 | 杭州乐秀电子科技有限公司 | High-speed electric hair drier |
| CN109259408B (en) * | 2018-09-30 | 2024-05-17 | 莱克电气股份有限公司 | Handle air inlet type hair dryer |
| CN111838937B (en) * | 2018-12-06 | 2022-12-09 | 深圳素士科技股份有限公司 | Hair drying device convenient to it is handheld |
| CN111418986A (en) * | 2019-01-10 | 2020-07-17 | 杭州乐秀电子科技有限公司 | Electric hair drier comfortable to use |
| CN109691771A (en) * | 2019-02-01 | 2019-04-30 | 宁波欧佩斯科技有限公司 | Hair dryer |
| CN111134435A (en) * | 2020-01-19 | 2020-05-12 | 追觅科技(上海)有限公司 | Hand-held hair drier |
| CN111972806B (en) * | 2020-01-21 | 2023-07-11 | 东莞市徕芬电子科技有限公司 | Handle structure of hair drier |
| CN111329216A (en) * | 2020-03-24 | 2020-06-26 | 绍兴市益强电器科技有限公司 | Hand-held blower with fresh air duct |
| KR102135465B1 (en) * | 2020-04-13 | 2020-07-17 | 오희정 | Dryer coated with far infrared rays for easy hair styling |
| CN111642886A (en) * | 2020-06-23 | 2020-09-11 | 杭州双凸利科技有限公司 | Hair drier with air guide inner pipe |
| CN111820569A (en) * | 2020-08-05 | 2020-10-27 | 追觅科技(上海)有限公司 | Automatic hair-dressing device |
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