CN214630583U

CN214630583U - Hand-held electric hair drier

Info

Publication number: CN214630583U
Application number: CN202022746400.0U
Authority: CN
Inventors: 刘汉峰; 豆宜明; 薛海东; 浦清
Original assignee: Yiren Automation Technology Ningbo Co ltd
Current assignee: Yiren Automation Technology Ningbo Co ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-11-09
Anticipated expiration: 2030-11-24

Abstract

The utility model discloses a hand-held type hair drier, the hair-dryer body includes body casing and discoid part, body casing include annular shell body and the concentric inside cylinder part that sets up with annular shell body, annular shell body includes open end of casing and casing tail end, casing tail end and inside cylinder part sealing connection, discoid part is connected with inside cylinder part, form annular gap between the outer circumference wall of discoid part and the open end of casing, set up the toroidal cavity between annular shell body and the inside cylinder part, set up heating element in the toroidal cavity, set up the income wind opening on the annular shell body, it is connected with the one end of handle to go into the wind opening, the handle is hollow structure, set up fan unit and single chip microcomputer control unit in the hollow structure. The utility model discloses wall department at annular gap form air exit produces the coanda effect, makes hairdryer utensil's air output have certain air to enlarge the effect, can effectual promotion air output, weather the hair more fast.

Description

Hand-held electric hair drier

Technical Field

The utility model relates to an electric hair drier field, concretely relates to hand-held type high speed motor and flabellum drive are by electric heating's hot-air hair drier, for example the hairdryer in little household electrical appliances field, dry the hair ware.

Background

The electric hair drier is mainly used for drying and shaping hair, and can also be used for local drying, heating and physical therapy in laboratories, physical therapy rooms, industrial production, art designing and other aspects.

Generally, a motor and a fan are provided, which suck air into a body, are heated by a heating wire, and are blown out. Typically such hair dryer appliances are provided with a collection opening or a diffusion nozzle which can be attached to or detached from the hair dryer appliance and which changes the speed and direction of the air flow exiting the hair dryer appliance.

A hand-held product employing a high speed motor is disclosed in dyson patent CN 201621361236.9. In the technical scheme, the rotating speed of the motor is between 7.5 and 11 thousands of revolutions per minute. The handheld product enables a fan unit consisting of a high-speed motor arranged in a handle to drive air to flow into a cavity of a body and quickly blow out from an annular outlet with the width of 2mm, an air multiplication technology is applied, the air speed can reach 17m/s, which can not be reached by a common hair drier, although the air speed is already high, the air flow direction changes by about 90 degrees when the air of the handle flows into the cavity of the body, the air speed and the air pressure are lost, and the loss in the aspect is reduced by arranging an air guide structural part in the prior art.

The technical scheme of the bladeless high-speed hair drier in the current market has the defect that the circuit board is arranged at the rear end of the top of the hair drier, the air flow is not smooth, and the heat dissipation problem is always a big problem.

The technical scheme of the bladeless high-speed hair drier in the market at present is that a filtering device is usually arranged at the air inlet end of the hair drier, but the filtering device and a filter screen are full of dust after being used for a long time, and the filtering device and the filter screen are not easy to perceive, so that the hair drier is frequently shut down or has an overheating protection fault and the like due to the reasons of the dust, and the experience feeling of consumers is reduced.

A hand held smoothing hair dryer is disclosed in patent application No. CN 201710809640.0. This technical scheme has included air multiplication device, its characterized in that: the air guide element is at least provided with an annular air outlet notch, and the width of the annular air outlet notch is within 1.3-1.4 mm. The technical scheme is not in line with a plurality of factors of the coanda effect, such as no coanda curved surface, and no research and definition on various factors of the inlet channel and the air outlet channel.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel hair drier structure, the structure is more reasonable, and the wind speed is bigger more steady, weathers the hair more fast.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a hand-held type hair drier, including hair-dryer body and handle, the hair-dryer body includes body casing and discoid part, body casing includes annular shell body and the concentric inside cylinder part that sets up with annular shell body, annular shell body includes casing open end and casing tail end, casing tail end and inside cylinder part sealing connection, discoid part is connected with inside cylinder part, form annular gap between the outer circumference wall of discoid part and the casing open end, set up annular cavity between annular shell body and the inside cylinder part, set up heating unit in the annular cavity, set up the inlet air opening portion on the annular shell body, the inlet air opening portion is connected with the one end of handle, the handle is hollow structure, hollow structure is the inlet air passageway, set up fan unit and single chip microcomputer control unit in the hollow structure, the one end that the hair-dryer body was kept away from to the handle sets up filter equipment.

Preferably, the outer circumferential wall surface of the disk-shaped member forms an inner lead-out surface of the annular gap, the inner circumferential wall surface of the annular outer case forms an annular guide inclined surface at the open end of the case, and the annular guide inclined surface forms an outer lead-out surface of the annular gap.

Preferably, the outer circumferential wall surface of the disk-shaped member includes an annular gap forming section wall surface and an annular gap leading-out section wall surface, the annular gap forming section wall surface forms an inner side guide surface of the annular gap, and the annular gap leading-out section wall surface is connected with the annular gap forming section wall surface and forms an inner included angle smaller than 180 °.

Preferably, the width of the annular gap is 0.5 mm-5 mm, and the included angle between the central line of the annular gap and the central axis of the air inlet channel is not less than 90 degrees.

Preferably, the wall surface of the annular gap forming section and the annular guide inclined surface are arranged in an internally and externally staggered manner to form the annular gap of the air outlet.

Preferably, the included angle between the central plane of the annular gap and the horizontal central axis of the blower body is 5-55 degrees.

Preferably, the wall surface of the annular gap forming section is an inclined surface or a curved surface, and the wall surface of the annular gap leading-out section is an inclined surface or a curved surface.

Preferably, one end of the inner cylindrical part protrudes out of the open end of the shell and is provided with an external thread, one end of the disc-shaped part is provided with an internal thread, the internal thread is meshed with the external thread to connect the disc-shaped part with the shell of the body, and the size and the shape of the annular gap are adjusted.

Preferably, a supporting structure is arranged in the annular cavity, a heating unit is arranged inside the supporting structure, the single chip microcomputer control unit is arranged at one end, close to the filtering device, of the handle, the filtering device comprises an outer-layer cylinder type coarse filtering device and an inner-layer stainless steel filtering device, and a power system of the fan unit is a forward and reverse rotating variable frequency motor.

Compared with the prior art, the beneficial effects of the utility model are that:

the main air entering the handle passes through the inlet of the filter device, is driven by the fan unit and then is sent into the annular cavity, and is ejected out at high speed by the annular gap-shaped air outlet. Air from the outside of the tail of the hair drier body is sucked by the quick airflow exhausted by the annular gap-shaped exhaust outlet through the air outlet channel, so that the coanda effect is generated. The ejected and entrained air streams constitute the total air stream emitted forward from the lead-out ramp formed by the blower body. Namely, the coanda effect is generated on the wall surface of the annular gap-shaped air outlet, so that the air output of the electric hair drier has certain air amplification effect, and the air output can be effectively improved. Wherein, the arrangement of annular gap form gas vent has the amplification effect to the air current. When the air flows out from the annular gap-shaped exhaust port, according to the coanda effect, the air (called as first air flow) is adsorbed on the wall surface of the air outlet guide component and flows along the wall surface, so that a certain negative pressure is generated in the central area of the curved surface of the annular inner wall, a large amount of surrounding air is sucked, the first air flow and the surrounding air flow are converged to form quick and high-volume air flow outflow, and the air amplification effect is realized. Additionally the utility model discloses be the direct current direction during the air current of handle flows to the toroidal cavity of hair-dryer body, reduced the loss of disappearing to wind speed and wind pressure to make the wind speed bigger more steady, weather the hair more fast.

Drawings

Fig. 1 is a front view of a hand-held electric hair dryer according to embodiment 1 of the present invention;

FIG. 2 is a rear view of FIG. 1;

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 5 is an enlarged view of a portion of FIG. 4 at B;

FIG. 6 is an exploded view of FIG. 1;

in the figure: 1. the blower comprises a blower body, 11, a body shell, 111, an annular outer shell, 1111, a shell open end, 1112, a shell tail end, 1113, an air inlet opening part, 112, an inner cylindrical part, 12, a disc-shaped part, 121, an annular gap forming section wall surface, 122, an annular gap leading-out section wall surface, 13, an annular cavity, 131, a supporting structure, 14, an annular gap, 2, a handle, 21, an air inlet channel, 22, control on/off, 3, a heating unit, 4, a fan unit, 41, a motor, 42, fan blades, 5, a single chip control unit, 6, a filtering device, 61, an outer-layer cylinder type coarse filtering device, 62, an inner-layer stainless steel filtering device, 7 and a honeycomb-shaped part.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 6, a hand-held electric hair dryer comprises a hair dryer body 1 and a handle 2, wherein the handle 2 is in a circular tube shape, the hair dryer body 1 comprises a body shell 11 and a disc-shaped part 12, the body shell 11 is in an E-shaped shape and comprises an annular outer shell 111 and an inner cylindrical part 112 concentrically arranged with the annular outer shell 111, the annular outer shell 111 is provided with a circular tube part and an arc part, the circular tube part and the arc part jointly form the annular outer shell 111, the annular outer shell 111 comprises a shell open end 1111 and a shell tail end 1112, and the shell tail end 1112 is an arc part and is hermetically connected with the inner cylindrical part 112. The outer wall diameter of the circular tube portion of the annular outer housing 111 is about 82 mm. The disk-shaped component 12 is also shaped like an E and is connected with the inner cylindrical component 112, an annular gap 14 is formed between the outer circumferential wall surface of the disk-shaped component 12 and the open end 1111 of the casing, an annular cavity 13 is arranged between the annular outer casing 111 and the inner cylindrical component 112, and the average thickness of the cavity wall of the annular cavity 13 is usually between 1mm and 5mm, preferably between 1mm and 3mm, which is beneficial to reducing the resistance of the airflow flow and reducing the loss of the airflow flow. The heating unit 3 is arranged in the annular cavity 13, the annular cavity 13 is provided with an air outlet, the air outlet is an annular gap 14 and is used for leading out circulating air in the annular cavity 13 to air outlet, and the width of the annular gap 14 is 0.5-5 mm, preferably 1.5-2.6 mm. The annular outer shell 111 is provided with an air inlet opening part 1113, the air inlet opening part 1113 is connected with one end of the handle 2, the handle 2 is of a hollow structure, the hollow structure is an air inlet channel 21, and the included angle between the annular gap 14 and the central axis of the air inlet channel 21 is not less than 90 degrees. A fan unit 4 and a single chip microcomputer control unit 5 are arranged in the hollow structure, and a filtering device 6 is arranged at one end, far away from the hair drier body 1, of the handle 2.

In other preferred embodiments, the outer circumferential wall surface of the disk-shaped member 12 forms an inner side lead-out surface of the annular slit 14, and the inner side wall surface of the annular outer case 111 forms an annular guide slope at the case open end 1111, the annular guide slope forming an outer side lead-out surface of the annular slit 14. The outer circumferential wall surface of the disc-shaped member 12 includes an annular gap forming section wall surface 121 and an annular gap leading-out section wall surface 122, the annular gap forming section wall surface 121 forms an inner side guide surface of the annular gap 14, and the annular gap forming section wall surface 121 and the annular guide inclined surface are arranged in an inside-outside staggered manner to form the annular gap 14 of the air outlet. The included angle between the central plane of the annular gap 14 and the horizontal central axis of the blower body 1 is 5-55 degrees. Annular gap derivation section wall 122 connects annular gap formation section wall 121 and forms 135 internal included angles, makes annular gap derivation section wall 122 form the tubaeform structure that gathers wind, and the macrostoma is towards annular gap 14 direction, and the osculum deviates from annular gap 14 direction, promotes and gathers the wind effect. The annular gap forming section wall surface 121 is an inclined surface, and the annular gap leading-out section wall surface 122 is a curved surface. One end of the inner cylindrical component 112 protrudes out of the open end 1111 of the shell and is provided with an external thread, one end of the disk-shaped component 12 is provided with an internal thread, the internal thread is meshed with the external thread to connect the disk-shaped component 12 and the body shell 11, and the size and the shape of the annular gap 14 are adjusted. Other connection means are of course possible.

The shell of the disc-shaped part 12, the shell of the body shell 11 and/or the shell of the handle 2 are made of plastic materials and sprayed with rubber paint, so that the attractiveness of the overall appearance of the electric hair drier is improved, the overall texture of the electric hair drier is improved, and the use feeling of a user is improved.

The interior of the annular cavity 13 is provided with a heating unit 3, and the heating unit 3 is used for heating the air flow in the annular cavity 13 and conveying the air flow to the front end of the hair dryer body 1 through an annular gap 14 exhaust outlet.

In the preferred embodiment, the handle 2 is provided with a control on/off 22 and an indicator light, and the control on/off 22 is provided as a push-pull type switch or a push-button type switch. A single-chip microcomputer control unit 5 is fitted in the handle 2, arranged near the main air inlet, for better heat dissipation. The single chip microcomputer control unit 5 controls the parameters of the temperature of the heating unit 3 and the rotational speed of the fan unit 4. Internal wiring (not shown) electrically connects the PCB to the heating unit 3, the fan unit 4 and the cable. A control on/off switch 22 is provided and connected to the PCB, and a user can select four-gear temperature settings (natural wind/first-gear temperature (low)/second-gear temperature (medium)/third-gear temperature (high)) and three-gear wind speed settings (first-gear wind speed (low)/second-gear wind speed (medium)/third-gear wind speed (high)).

In the preferred embodiment, the fan unit 4 is disposed within the hollow structure of the handle 2, the fan unit 4 being formed by a combination of a motor 41 and fan blades 42. The fan unit 4 draws air through the main air inlet and the air flow passes through the air inlet passage of the handle 2 and into the blower body 1, around the heater core unit, and is heated and rapidly expelled through the annular gap 14 exhaust. The power system of the fan unit 4 is a forward and reverse rotation variable frequency motor, can be periodically reversed to remove dust on the filter screen, and simultaneously plays a role in radiating the singlechip control unit 5, thereby reducing the probability of non-accident shutdown or overheat shutdown.

In the preferred embodiment, in order to isolate the foreign matters and improve the flow guiding effect of the incoming wind and the outgoing wind, the filter device 6 comprises an outer cylindrical coarse filter device 61 and an inner stainless steel filter device 62 which are arranged at the wind inlet. The outer-layer cylindrical coarse filter 61 and the inner-layer stainless steel filter 62 can be removed and cleaned by wiping or brushing.

In the preferred embodiment, the handle 2 is provided with a honeycomb member 7 inside the tubular shape, and the honeycomb member 7 is integrally connected to the inner wall of the handle 2 for supporting and reinforcing the handle 2 and reducing the resistance to the wind.

The working principle is as follows: the air entering the handle 2 through the inlet of the filter device 6 is driven by the fan unit 4 and sent to the annular cavity 13, and is ejected by the air outlet of the annular gap 14. The air from the outside of the tail part of the hair drier body 1 is sucked by the rapid air flow discharged from the air outlet of the annular gap 14, the coanda effect is generated, and the sprayed air flow and the sucked air flow form the total air flow which is emitted forwards from the surface of the guide section of the annular gap. Namely, the coanda effect is generated on the inner wall surface of the air outlet of the annular gap 14, so that the air output of the electric hair drier has certain air amplification effect, and the air output can be effectively improved. Wherein, the arrangement of the air outlet of the annular gap 14 has the amplification effect on the air flow. When the air flows out from the air outlet of the annular gap 14, according to the coanda effect, the air (called as the first air flow) is adsorbed on the inner wall surface of the air outlet guide part and flows along the inner wall surface, so that a certain negative pressure is generated in the central area of the curved surface of the annular inner wall, a large amount of surrounding air is sucked, and the first air flow and the surrounding air flow are converged to form a quick and high-volume air flow to flow out, so that the air amplification effect is realized. Additionally the utility model discloses be the direct current direction during the air current of handle 2 flows to the toroidal cavity 13 of hair-dryer body 1, reduced the loss of elimination to wind speed and wind pressure to make the wind speed bigger more steady, weather the hair more fast.

Experimental tests were performed on the hand-held hair dryer of the examples as follows:

wind speed: removing the air nozzle, and testing the highest wind speed by an anemoscope at the positions 0mm, 100mm and 200mm away from the air outlet on the axis of the air outlet cylinder;

air volume: removing the air nozzle, and measuring wind power (namely air volume) on the position which is 10mm, 100mm and 200mm away from the air outlet on the axis of the air outlet cylinder by using an electronic scale;

the measuring range of the electronic scale is as follows: 0 to 500 grams s;

anemometer measurement range: 0.3-45 m/s;

ambient temperature: 23.8 degrees.

The experimental results are as follows:

the experimental results show that:

the maximum wind speed measured by Dyson is 16.86m/s, and the values of the Dyson manufacturer publicity (17m/s) and the network evaluation (16-17 m/s) are basically consistent, which indicates that the measuring method is credible.

A large number of prototype tests finally prove that the air outlet effect of the electric hair drier is optimal when the gap of the annular gap 14 is 2 mm.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hand-held type electric hair dryer, includes hair dryer body and handle, its characterized in that: the hair drier body comprises a body shell and a disc-shaped part, the body shell comprises an annular outer shell and an inner cylindrical part concentrically arranged with the annular outer shell, the annular outer shell comprises a shell open end and a shell tail end, the shell tail end is hermetically connected with the inner cylindrical part, the disc-shaped part is connected with the inner cylindrical part, an annular gap is formed between the outer circumferential wall surface of the disc-shaped part and the shell open end, an annular cavity is arranged between the annular outer shell and the inner cylindrical part, a heating unit is arranged in the annular cavity, an air inlet opening part is arranged on the annular outer shell and is connected with one end of a handle, the handle is of a hollow structure, the hollow structure is an air inlet channel, and a fan unit and a single chip microcomputer control unit are arranged in the hollow structure, one end of the handle, which is far away from the hair drier body, is provided with a filtering device.

2. A hand-held electric hair dryer as claimed in claim 1, wherein: the outer circumferential wall surface of the disc-shaped part forms an inner side leading-out surface of the annular gap, an inner side wall surface of the annular outer shell forms an annular guide inclined surface at the open end of the shell, and the annular guide inclined surface forms an outer side leading-out surface of the annular gap.

3. A hand-held electric hair dryer as claimed in claim 2, wherein: the outer circumference wall of the disc-shaped part comprises an annular gap forming section wall and an annular gap leading-out section wall, the annular gap forming section wall forms the inner side guide surface of the annular gap, and the annular gap leading-out section wall is connected with the annular gap forming section wall and forms an inner included angle smaller than 180 degrees.

4. A hand-held electric hair dryer as claimed in claim 1, wherein: the width of the annular gap is 0.5-5 mm, and the included angle between the central line of the annular gap and the central axis of the air inlet channel is not less than 90 degrees.

5. A hand-held electric hair dryer as claimed in claim 3, wherein: the wall surface of the annular gap forming section and the annular guide inclined surface are arranged in an inside-outside staggered mode to form the annular gap of the air outlet.

6. A hand-held electric hair dryer as claimed in claim 1, wherein: the included angle between the central plane of the annular gap and the horizontal central axis of the blower body is 5-55 degrees.

7. A hand-held electric hair dryer as claimed in claim 3, wherein: the wall surface of the annular gap forming section is an inclined surface or a curved surface, and the wall surface of the annular gap leading-out section is an inclined surface or a curved surface.

8. A hand-held electric hair dryer as claimed in claim 1, wherein: one end of the inner cylindrical part protrudes out of the open end of the shell and is provided with an external thread, one end of the disc-shaped part is provided with an internal thread, and the internal thread is meshed with the external thread, is connected with the disc-shaped part and the body shell, and adjusts the size and the shape of the annular gap.

9. A hand-held electric hair dryer as claimed in claim 1, wherein: set up bearing structure in the annular cavity, bearing structure is inside to be set up the heating element, single chip microcomputer control unit arranges in be close to in the handle filter equipment's one end, filter equipment includes outer cylinder coarse filtration device and inlayer stainless steel filter equipment, fan unit's driving system is just reversing inverter motor.