CN105919494B - Hand drier - Google Patents
Hand drier Download PDFInfo
- Publication number
- CN105919494B CN105919494B CN201610508669.0A CN201610508669A CN105919494B CN 105919494 B CN105919494 B CN 105919494B CN 201610508669 A CN201610508669 A CN 201610508669A CN 105919494 B CN105919494 B CN 105919494B
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- China
- Prior art keywords
- air inlet
- baffle
- air
- hand dryer
- noise
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K10/00—Body-drying implements; Toilet paper; Holders therefor
- A47K10/48—Drying by means of hot air
Abstract
The invention relates to the technical field of hand dryer, and provides a hand dryer. The hand dryer comprises a shell and a motor arranged in the shell; the shell is provided with a first air inlet, the motor is provided with a second air inlet, and an air inlet channel is communicated between the first air inlet and the second air inlet; a baffle is arranged in the air inlet channel, and a gap for passing air flow is formed between the baffle and the inner wall of the air inlet channel. Due to the existence of the baffle, on one hand, when the noise emitted by the motor is transmitted outwards along the air inlet channel, the noise is blocked by the baffle, and part of the motor noise is reflected back, so that the noise transmitted to the outside of the first air inlet is greatly reduced; the air flow entering from the first air inlet can be blocked by the baffle plate, so that the air flow entering from the first air inlet is firstly dispersed and then converged, a rectification effect is formed, and the noise generated by the air flow is reduced.
Description
Technical Field
The invention relates to the technical field of hand dryers, and particularly provides a hand dryer with a noise reduction component.
Background
In recent years, a hand drying device for inserting wet hands after washing and blowing hot air is generally provided in a toilet/restroom in a public place such as a restaurant, a hotel, a business office building and the like, so that people can dry the hands quickly after washing the hands. This product produces considerable noise because of the high-speed motion of air current and motor self in the use, in order to reduce this noise, promotes user's use and experiences, and prior art basically inhales the cotton purpose that reaches the noise absorption through increasing in the wind channel. However, the sound insulation effect by the sound-absorbing cotton alone is not significant.
In addition, some hand dryers are provided with a guide frame arranged at the air inlet of the motor, and guide vanes extend out of a shaft core part of the guide frame, so that the noise generated at the air inlet of the hand dryer can be effectively reduced through the arc-shaped guide vanes and the structure formed by the guide vanes. But it is clear that the structure is relatively complex and the manufacturing cost is high. Meanwhile, the coaxiality of the guide vane and the axis of the motor is required to be higher, so that the generation of smaller noise can be maintained. The rotation of the guide vanes also generates noise when the motor is in operation, which is contrary to the purpose of noise reduction.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problem that the noise of the existing hand dryer is too high in the hand drying process.
(II) technical scheme
In order to solve the technical problem, the invention provides a hand dryer. The hand dryer comprises a housing and a motor arranged in the housing; the shell is provided with a first air inlet, the motor is provided with a second air inlet, and an air inlet channel is communicated between the first air inlet and the second air inlet; the air inlet channel is internally provided with a baffle, and a gap for passing air flow is arranged between the baffle and the inner wall of the air inlet channel.
Preferably, the baffle is perpendicular to the extending direction of the air inlet channel.
Preferably, the baffle is disc-shaped.
Preferably, the cross section of the air inlet channel is circular.
Preferably, the gap is of an overall annular structure.
Preferably, the distance between the edge of the baffle and the inner wall of the first air inlet channel is 1-5 cm.
Preferably, the baffle is fixedly connected with the air inlet channel.
Preferably, one side of the baffle, which faces the first air inlet, is provided with sound absorption cotton.
Preferably, the sound-absorbing cotton is detachably connected with the baffle.
Preferably, the baffle is wrapped with sound-absorbing cotton.
Preferably, a flow guide cover is arranged in the air inlet channel and on the periphery of the second air inlet in a covering mode, and an opening is formed in the flow guide cover.
Preferably, the opening faces opposite to the first air inlet.
Preferably, the outer wall of the drainage cover at the opening is attached to the inner wall of the air inlet channel.
Preferably, the aperture of the drainage hood gradually decreases from the opening to one end communicated with the second air inlet.
Preferably, one end of the drainage cover communicated with the second air inlet is of an arc surface structure.
(III) advantageous effects
According to the hand dryer provided by the invention, the baffle is arranged in the air inlet channel, so that on one hand, the noise transmitted from the air inlet channel can be blocked, and on the other hand, the inlet airflow can be rectified by dispersion and reunion, so that the noise of the inlet airflow is reduced, and the noise of the whole hand dryer is greatly reduced on the whole.
Drawings
Fig. 1 is a schematic view of a hand dryer according to an embodiment of the present invention.
Fig. 2 is an exploded view of the pod and motor of an embodiment of the present invention.
Fig. 3 is a bottom view of the first housing half of an embodiment of the present invention.
Fig. 4 is a side view of the first housing half of an embodiment of the present invention.
Fig. 5 is a front view of the first housing half of an embodiment of the present invention.
Reference numerals:
1. a housing; 2. a hand insertion portion; 3. a first air inlet; 4. a first air outlet; 5. a motor; 6. an air inlet channel; 7. an air outlet channel; 8. a first half shell; 81. a cambered surface structure; 9. a second half shell; 10. a drainage cover; 11. a second air inlet; 12. and a baffle plate.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, e.g. as a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
As shown in fig. 1, a hand dryer provided by the first embodiment of the present invention includes a housing 1 and a motor 5 disposed in the housing 1; the shell 1 is provided with a first air inlet 3, the motor 5 is provided with a second air inlet 11, an air inlet channel 6 is communicated between the first air inlet 3 and the second air inlet 11, and the air inlet channel 6 is a channel structure formed in the shell 1; in addition, the shell 1 is also provided with a hand insertion part 2, and the inner wall of the hand insertion part 2 is provided with a first air outlet 4; the motor 5 is also provided with a second air outlet, and an air outlet channel 7 is communicated between the first air outlet 4 and the second air outlet. Therefore, power is provided for the air inlet of the hand dryer through the motor 5, when the motor 5 runs, air flow enters from the first air inlet 3, then sequentially passes through the air inlet channel 6, the second air inlet 11, the second air outlet and the air outlet channel 7, and finally is discharged into the hand insertion part 2 through the first air outlet 4 to blow the hand of a user.
Wherein, a baffle plate 12 is arranged in the air inlet channel 6, a gap for passing the air current is arranged between the baffle plate 12 and the inner wall of the air inlet channel 6, the shape of the gap can be but not limited to ring, crescent or polygon, as long as the air current can pass through.
Due to the existence of the baffle 12, on one hand, when the noise emitted by the motor 5 is transmitted outwards along the air inlet channel 6, the noise is blocked by the baffle 12, part of the motor noise is reflected back, and part of the motor noise is absorbed by the baffle 12, so that the noise transmitted to the outside of the first air inlet 3 is greatly reduced; another convenience, the air current that gets into by first air intake 3 can receive the hindrance of baffle 12, and the air current that admits air is dispersed earlier, and through reunion after the clearance, this process reintegrates the air current, will originally have the air current of indiscriminate flow to integrate into the air current that the air current flow direction is more even, and the vibration intensity of air current also can weaken, makes the noise that admits air current itself produced also reduce from this.
Therefore, the baffle plate 12 can reduce the noise of the motor from being transmitted outwards and reduce the noise generated by the air inlet flow, thereby greatly reducing the noise of the whole machine on the whole.
In addition, the baffle 12 is preferably arranged perpendicular to the extension direction of the inlet duct 6, i.e. the cross-section of the inlet duct 6 at the position of the baffle 12 coincides with the plane of the baffle 12. The advantage of this arrangement is that, on the one hand, since the noise generated by the motor 5 is mainly transmitted outwards through the air intake channel 6, when the motor noise is transmitted to the position of the baffle 12, the motor noise is vertically incident on the baffle 12, and at this time, the reflectivity of the baffle 12 to the motor noise is the highest, i.e. the blocking effect to the motor noise is the best. On the other hand, since the baffle 12 is perpendicular to the direction of the intake air flow, the intake air flow will be uniformly dispersed and not concentrated to one side after perpendicularly shooting onto the baffle 12, thereby avoiding the formation of local high-speed air flow when passing through the gap, and further avoiding the generation of sharp noise.
The cross-sectional shapes of the baffle plate 12 and the air inlet channel 6 are preferably circular, and the gap formed between the edge of the baffle plate 12 and the inner wall of the air inlet channel 6 is preferably annular, that is, the width of the gap at different circumferential positions is uniform, and no local slit exists, so that the uniformly dispersed intake airflow can uniformly pass through the annular gap, and no sharp noise is generated. It should be noted that the cross-sectional shapes of the baffle plate 12 and the air intake duct 6 are not limited to circular, and for example, the shape of the baffle plate 12 may be adapted to the cross-sectional shape of the air intake duct 6, or a uniform annular gap may be formed therebetween.
Further, the interval between the edge of baffle 12 and the inner wall of first inlet air duct 6 is preferably 1 ~ 5cm, more preferably 2 ~ 3cm, from this, can guarantee the even through air inlet airflow of this annular clearance, can also guarantee sufficient intake air volume, and the clearance of this width also is difficult for making the air current form high frequency vibration moreover, can not send sharp noise promptly.
The baffle plate 12 is fixedly connected with the air inlet channel 6, and is preferably made of a material with strong rigidity, so that the baffle plate 12 is prevented from generating noise due to vibration in high-speed airflow, and meanwhile, the intake airflow is not disturbed.
The baffle 12 is equipped with the sound cotton of inhaling towards one side of first air intake 3, and in the in-process of admitting air, the air current of admitting air is beaten at the baffle 12 one side towards first air intake 3 at first, and the air current of admitting air can laminate this side surface of baffle 12 afterwards, from the center to the edge flow, and because baffle 12 is equipped with the sound cotton of inhaling towards one side of first air intake 3, so the air current of admitting air actually flows in the sound cotton of inhaling on baffle 12 surface, and baffle 12 is its main part that takes place the contact with the air current of admitting air towards one side of first air intake 3, so this sound cotton of inhaling setting can reduce the air current of admitting air and the preceding friction noise of baffle 12 by a wide.
Further, inhale preferably to dismantle between sound cotton and the baffle 12 and be connected, because inhale the sound cotton when inhaling the sound, also can play certain interception effect to dust etc. in the air current that admits air, consequently inhale the sound cotton after long-term the use and mix with a large amount of dust easily, can influence like this and inhale sound effect and trafficability characteristic, and will inhale and set up to dismantle between sound cotton and the baffle 12 and be connected the back, alright regular is inhaled the sound cotton and is changed to this has guaranteed the sound effect of inhaling of sound cotton.
The baffle 12 may also be wrapped with sound absorbing cotton, that is, the baffle 12 has sound absorbing cotton at its edge and at the side facing away from the first air inlet 3, in addition to the sound absorbing cotton at the side facing the first air inlet 3; the sound-absorbing cotton existing at the edge of the baffle plate 12 can play a sound-absorbing role when the inlet air flow bypasses the edge of the baffle plate 12, so that the sound-absorbing effect is further improved; the sound-absorbing cotton existing on the side of the baffle plate 12, which is back to the first air inlet 3, can absorb part of the noise of the motor, so that the noise of the whole machine is further reduced. The sound-absorbing cotton can be sleeved on the baffle 12 in an integrally detachable manner, so that the replacement is convenient.
Example two
The hand dryer provided by the second embodiment of the invention comprises any one possible implementation mode in the first embodiment, and is further improved on the basis that:
as shown in fig. 1, a flow guide cover 10 is covered on the periphery of the second air inlet 11 in the air inlet channel 6, an opening is formed in the flow guide cover 10, the second air inlet 11 is communicated with the first air inlet 3 through the opening in the flow guide cover 10, the direction of the opening is preferably opposite to that of the first air inlet 3, and the outer wall of the flow guide cover 10 in the area where the opening is located is preferably attached to the inner wall of the air inlet channel 6, so that the intake air can more directly and smoothly enter the flow guide cover 10 through the opening.
Because the flow guide cover 10 covers the periphery of the second air inlet 11, that is, a small-range cavity structure is formed at the periphery of the second air inlet 11, the cavity structure can guide the intake airflow about to enter the second air inlet 11, normalize the disordered airflow to be substantially toward the direction of the second air inlet 11, and soften the strength of the airflow, thereby reducing or even eliminating the intake noise of the second air inlet 11.
Moreover, because the volume of the motor noise emitted by the direct radiation of the second air outlet is the maximum, when the peripheral cover of the second air outlet is provided with the flow guide cover 10, the motor noise emitted by the direct radiation of the second air outlet can be reflected and absorbed, a good isolation effect is achieved, and the motor noise emitted outwards is greatly reduced.
The distance between the flow guiding hood 10 and the second air outlet in the projection direction of the second air outlet is preferably more than 8mm, so that the cavity structure has enough guiding space to guide the whole intake air flow.
Preferably, the sound absorption cotton is arranged on the drainage cover 10 and can be arranged on the inner side and the outer side of the drainage cover 10 so as to enhance the absorption effect of the drainage cover 10 on the noise of the motor. In summary, the drainage cover 10 can greatly reduce the overall noise of the hand dryer.
Referring again to fig. 2, the above-mentioned drainage mask 10 may be formed by a first half-shell 8 and a second half-shell 9; the first half-shell 8 is formed at the periphery of the second air outlet; the second half-shell 9 is detachably connected to the first half-shell 8 to define a cavity structure having an opening through which the second air outlet is accommodated.
Referring to fig. 3 to 5, the opening of the flow guide cover 10 is smaller than the opening of the end of the flow guide cover 10 communicating with the second air inlet 11, that is, the area of the opening of the flow guide cover 10 is larger than the area of the opening of the end of the flow guide cover 10 communicating with the second air inlet 11, and in the air intake direction, the inner space of the flow guide cover 10 is gradually reduced, that is, the flow guide cover 10 plays a role of gathering the intake air, so that the intake air to be introduced into the second air inlet 11 is more concentrated, the chaotic air flow formed outside the second air inlet 11 is reduced, and the air flow noise is further reduced.
The preferred cambered surface structure 81 that is connected with the second air intake 11 in one end of flow guide cover 10, this cambered surface structure 81 part is the part that links up with the second air intake 11 region mutually, and is the biggest to the air current state that gets into second air intake 11, and the shape of its cambered surface is favorable to more standardizing the air current of admitting air that will enter into second air intake 11 for the direction of perpendicular to second air intake 11, makes the more smooth entering second air intake 11 of air current of admitting air, can further reduce the air current noise from this.
In general, the above-mentioned flow guiding cover 10 and the baffle 12 can respectively form a good restraining effect for the noise of the intake air flow and the noise of the motor, so when the two are used in combination, the noise of the whole machine can be greatly reduced.
In addition, when the flow guide cover 10 and the baffle 12 are used in a combined manner, the noise reduction effect is not only simple superposition, because the intake air flow naturally generates a trend of gathering towards the middle after passing through the gap between the baffle 12 and the air inlet channel, the air flow is just in the flow guide cover 10 at the moment, the space structure inside the flow guide cover is just adapted to the flowing trend of the internal air flow, the rectification effect is better, and the flow guide cover 10 keeps the uniformity of the air flow through the flow guide effect of the flow guide cover 10 until the air flow is finally sent into the second air inlet 11.
It can be seen that the baffle 12 can achieve better airflow noise reduction effect by cooperating with the air guide sleeve 10.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A hand dryer is characterized by comprising a shell and a motor arranged in the shell; the shell is provided with a first air inlet, the motor is provided with a second air inlet, and an air inlet channel is communicated between the first air inlet and the second air inlet; a baffle is arranged in the air inlet channel, a gap for air flow to pass through is formed between the baffle and the inner wall of the air inlet channel, and the gap is an annular gap with uniform width at different circumferential positions; the air inlet channel is internally provided with a drainage cover which is covered on the periphery of the second air inlet, an opening is arranged on the drainage cover, the direction of the opening is opposite to that of the first air inlet, the drainage cover is gradually reduced from the opening to the end opening communicated with the second air inlet, and the drainage cover is of an arc surface structure with the end communicated with the second air inlet.
2. A hand dryer according to claim 1, wherein the baffle is perpendicular to the direction of extension of the air inlet channel.
3. A hand dryer according to claim 1 wherein the flap is disc-shaped.
4. A hand dryer according to claim 3 wherein the cross-section of the air inlet channel is circular.
5. The hand dryer as claimed in claim 1, wherein the distance between the edge of the baffle and the inner wall of the air inlet channel is 1-5 cm.
6. The hand dryer of claim 1, wherein the baffle is fixedly connected to the air intake channel.
7. The hand dryer of claim 1, wherein a side of the baffle facing the first air inlet is provided with sound absorbing cotton.
8. A hand dryer according to claim 7, wherein the sound absorbing cotton is removably attached to the baffle.
9. A hand dryer according to claim 1, wherein the baffle is encased with sound absorbing cotton.
10. The hand dryer of claim 1, wherein the outer wall of the flow guide hood at the opening is attached to the inner wall of the air inlet channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610508669.0A CN105919494B (en) | 2016-06-29 | 2016-06-29 | Hand drier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610508669.0A CN105919494B (en) | 2016-06-29 | 2016-06-29 | Hand drier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105919494A CN105919494A (en) | 2016-09-07 |
| CN105919494B true CN105919494B (en) | 2019-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610508669.0A Active CN105919494B (en) | 2016-06-29 | 2016-06-29 | Hand drier |
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| CN (1) | CN105919494B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI646934B (en) * | 2017-08-14 | 2019-01-11 | 群光電能科技股份有限公司 | Hand dryer device |
| US10165908B1 (en) | 2017-09-06 | 2019-01-01 | Hokwang Industries Co., Ltd. | Hand dryer with reduced air-intake noise |
| DE102017120955B4 (en) | 2017-09-11 | 2020-01-09 | Hokwang Industries Co., Ltd. | Hand dryer with reduced air intake noise |
| WO2023010825A1 (en) * | 2021-08-04 | 2023-02-09 | 追觅科技(苏州)有限公司 | Air-out apparatus, display assembly and hand dryer |
| CN114601361A (en) * | 2022-01-18 | 2022-06-10 | 丁小红 | Intelligent air drying device |
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| CN202821197U (en) * | 2012-07-06 | 2013-03-27 | 湖州巨宏电机有限公司 | Axial flow guide impeller of vacuum cleaner |
| CN202776150U (en) * | 2012-07-17 | 2013-03-13 | 宁波富达电器有限公司 | Combined type inlet air baffle plate for deduster |
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| CN205094319U (en) * | 2015-10-10 | 2016-03-23 | 江苏美的清洁电器股份有限公司 | Motor element and have its dust catcher |
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| CN206414210U (en) * | 2016-06-29 | 2017-08-18 | 广东美的环境电器制造有限公司 | Hand dryer |
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| CN201216544Y (en) * | 2008-06-06 | 2009-04-08 | 广东康宝电器有限公司 | Cold-hot towel cabinet |
| CN202277293U (en) * | 2011-11-05 | 2012-06-20 | 浙江艾克电器有限公司 | Air inlet and outlet device of hand dryer |
| CN203724020U (en) * | 2014-01-10 | 2014-07-23 | 金启想 | Novel hand dryer |
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| Publication number | Publication date |
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| CN105919494A (en) | 2016-09-07 |
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