CN211534186U

CN211534186U - Hand drier

Info

Publication number: CN211534186U
Application number: CN201922459620.2U
Authority: CN
Inventors: 金星海; 金启焕
Original assignee: Zhejiang Feegoo Technology Co ltd
Current assignee: Zhejiang Feegoo Technology Co ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-09-22
Anticipated expiration: 2029-12-30

Abstract

The utility model discloses a hand dryer, include the base and fix the fan on the base, fan gas vent intercommunication is equipped with bellows, and bellows gas outlet is not just to setting up with the bellows air inlet, bellows gas outlet intercommunication is equipped with the exhaust silencer that constitutes hand dryer air-out passageway. The air flow channel of the exhaust silencer is a curved channel. The air box is arranged at the air outlet of the fan, so that the through-flow section of the high-pressure airflow is increased, and the flow direction of the airflow is changed, therefore, the high-pressure airflow sent out by the fan is diffused after entering the air box, the pressure of the high-pressure airflow can be reduced, the airflow can be stabilized, and the noise energy transmitted can be attenuated; in addition, the air outlet of the air box adopts the exhaust silencer as an air outlet channel of the hand dryer, so that noise energy can be further absorbed and consumed, and noise transmitted from an air outlet of the hand dryer is effectively reduced, thereby achieving the purpose of reducing the overall noise of the hand dryer.

Description

Hand drier

Technical Field

The utility model relates to a hand dryer technical field.

Background

The hand dryer is a drying device for drying wet hands after washing by using hot air generated by the hand dryer. The main body of the existing hand dryer mainly comprises a base, a fan, a heater and a control part, when the hand dryer works, the hand dryer is started, and high-pressure airflow sent by the fan is heated by the heater and then is blown out from an air outlet of the hand dryer. In the working process of the hand dryer, the operation of the fan and the high-pressure airflow generated by the fan can generate large noise and the noise is transmitted out from the air inlet and the air outlet of the hand dryer and the shell of the hand dryer, so that noise pollution is caused to the use place of the hand dryer, and the work, life and health of people are not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can reduce hand dryer of hand dryer complete machine noise.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the hand dryer comprises a base and a fan fixed on the base, wherein an air box is communicated with an air outlet of the fan, an air outlet of the air box is not opposite to an air inlet of the air box, and an exhaust silencer forming an air outlet channel of the hand dryer is communicated with an air outlet of the air box.

The air flow channel of the exhaust silencer is a curved channel.

The curve is a serpentine curve.

The exhaust silencer comprises a silencer shell, a silencer air inlet used for communicating an air box and a silencer air outlet used for forming an air outlet of the hand dryer are formed in the shell, at least two partition plates are arranged in the silencer shell at intervals, only one end of each partition plate and the inner wall of the silencer shell form air vents, and the air vents of the adjacent partition plates are arranged at the two ends of the partition plates in a staggered mode to form a serpentine airflow channel.

And the baffle plate is provided with a sound absorption layer.

The air outlet of the air box and the air inlet of the air box are arranged in a space of 90 degrees, and the heater of the hand dryer is arranged in the air box; the air inlet of the exhaust silencer and the air outlet of the exhaust silencer are arranged on the same straight line, and the straight line is parallel to the axis of the fan.

The air inlet of the fan is communicated with an air inlet silencer, the air inlet silencer comprises a cylindrical shell, the air inlet silencer is communicated with an air outlet on one end face of the cylindrical shell and is arranged on the air inlet of the fan, an air suction port is arranged on the other end face of the cylindrical shell, and an opening of the air suction port and an opening of the air outlet of the cylindrical shell are both smaller than the through-flow section of the cylindrical shell.

The air suction port is provided with a cover body for shielding the air suction port to reflect noise, and one side of the cover body facing the base is opened to form an air inlet.

And the inner peripheral wall surface of the cylindrical shell is annularly provided with a sound absorbing layer.

And a sound absorption layer is arranged in the shell of the fan in a surrounding manner.

The air box is arranged at the air outlet of the fan, so that the through-flow section of the high-pressure airflow is increased, and the flow direction of the airflow is changed, therefore, the high-pressure airflow sent out by the fan is diffused after entering the air box, the pressure of the high-pressure airflow can be reduced, the airflow can be stabilized, and the noise energy transmitted can be attenuated; in addition, the air outlet of the air box adopts the exhaust silencer as an air outlet channel of the hand dryer, so that noise energy can be further absorbed and consumed, and noise transmitted from an air outlet of the hand dryer is effectively reduced, thereby achieving the purpose of reducing the overall noise of the hand dryer.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present invention (a main body of a hand dryer with a casing removed);

FIG. 2 is a schematic structural view of the housing used in FIG. 1;

FIG. 3 is a schematic view of the exhaust muffler of FIG. 1 with the upper housing removed;

FIG. 4 is a top view of the exhaust muffler of FIG. 1;

3 FIG. 3 5 3 is 3 a 3 sectional 3 view 3 A 3- 3 A 3 of 3 FIG. 3 4 3; 3

FIG. 6 is a cross-sectional view taken longitudinally along the fan axis in FIG. 1;

FIG. 7 is a cross-sectional view taken longitudinally along the centerline of the windbox of FIG. 1.

Detailed Description

The utility model provides an embodiment of hand dryer is shown in fig. 1-7, it includes the hand dryer main part and is used for the spiral-lock shell 1 in the hand dryer main part, the hand dryer main part includes base 2, fan 3, bellows 5, heater 7, admit air silencer 4 and exhaust silencer 6, wherein fan and bellows fixed mounting are on the base, admit air silencer 4, fan 3, bellows 5 and exhaust silencer 6 concatenate the air current passageway that the intercommunication constitutes the hand dryer in proper order, be equipped with the shutter structure on the shell 1, so that outside air gets into inside and is inhaled silencer 4 that admits air, the gas outlet 61 of the wind gap 11 of seting up on the shell 1 and exhaust silencer is corresponding, constitute the air outlet of hand dryer.

In this embodiment, the axis of the fan 3 is parallel to the base 2, the fan exhaust port is close to the base 2, the bellows 5 is communicated with the fan exhaust port through the air inlet, the air outlet of the bellows and the air inlet of the bellows are arranged in a space of 90 degrees, and the bellows 5 has the functions of pressure reduction, pressure stabilization and noise reduction. Meanwhile, in order to make the structure of the hand dryer more compact and more miniaturized, the heater 7 of the hand dryer is arranged in the air box, so that the air flow is heated.

In this embodiment, the exhaust muffler 6 includes a muffler housing 62, the housing is formed by buckling an upper housing and a lower housing, both ends of the housing 62 are respectively provided with a muffler inlet for communicating with the air box and a muffler outlet 61 for forming the air outlet of the hand dryer, the exhaust muffler inlet and the exhaust muffler outlet are disposed at the same side of the housing 62 and located on the same straight line, the straight line is parallel to the axis of the blower, and thus, the exhaust muffler actually forms the air outlet channel of the hand dryer. The exhaust silencer shell is internally provided with a plurality of partition plates 63 at intervals, the number of the partition plates can be 2, 3 or more according to the requirement, only one end of each partition plate and the inner wall of the exhaust silencer shell form an air vent, the air vents of the adjacent partition plates are arranged at two ends of each partition plate in a staggered mode, and accordingly a serpentine air flow channel is formed, as shown by dotted lines in fig. 5, and arrows indicate the air flow direction.

When the exhaust silencer is specifically implemented, the curved airflow channel of the exhaust silencer is not limited to a serpentine shape and can also be a spiral curve shape, the airflow channel which is repeatedly bent can prolong the airflow circulation path in a limited space, and the reflection times are increased, so that more noise energy is attenuated and reflected, and the noise transmitted from the air outlet of the hand dryer is effectively reduced. In order to achieve a better sound-absorbing effect, a sound-absorbing layer 64 may be further disposed on the partition 63 by using sound-absorbing materials such as sound-absorbing cotton and/or sound-absorbing plates.

In this embodiment, the intake silencer 4 includes a cylindrical housing, the end faces at both ends of the cylindrical housing are respectively provided with an air suction port and an air exhaust port, the intake silencer is communicated with the air inlet of the fan through the air exhaust port, and the openings of the air exhaust port and the air suction port are both smaller than the through-flow cross section of the cylindrical housing, so that the intake silencer 4 can stabilize pressure, provide uniform air flow for the fan, and reduce noise from the fan 3, thereby reducing noise transmitted from the air inlet of the hand dryer. In order to achieve a better noise reduction effect, a cover body 42 capable of reflecting noise can be arranged on the air suction port, the front face of the air suction port is completely shielded by the cover body, the side wall of the cover body is sealed and enclosed on the air suction port, and only one side facing the base 2 is opened, so that an air inlet 41 is formed, and foreign matters are prevented from falling into the air inlet; in addition, a sound absorbing layer 43 made of a sound absorbing material such as sound absorbing cotton and/or a sound absorbing plate may be provided around the inner circumferential wall surface of the cylindrical casing to further reduce noise.

In the embodiment, in order to further reduce the noise of the whole hand dryer, the sound absorption layer 31 is arranged in the shell of the fan 3 in a surrounding manner, and the sound absorption layer can be made of sound absorption materials such as sound absorption cotton and/or a sound absorption plate, and can reduce the intensity of the noise transmitted from the shell of the fan to the outside.

In this embodiment, the noise on the different propagation paths of hand dryer has been eliminated respectively to exhaust silencer and air intake silencer, has all played the effect that the hand dryer complete machine was made an uproar, consequently, when concrete implementation, set up one of them alone and also can realize the utility model discloses an aim, nevertheless set up simultaneously then can obtain better complete machine noise reduction noise cancelling effect.

Claims

1. Hand dryer, including the base with fix the fan on the base, its characterized in that: the exhaust port of the fan is communicated with an air box, an air outlet of the air box is not arranged right opposite to an air inlet of the air box, and an exhaust silencer forming an air outlet channel of the hand dryer is communicated with the air outlet of the air box.

2. A hand dryer according to claim 1, characterised in that: the air flow channel of the exhaust silencer is a curved channel.

3. A hand dryer according to claim 2, characterised in that: the curve is a serpentine curve.

4. A hand dryer according to claim 3, characterised in that: the exhaust silencer comprises a silencer shell, a silencer air inlet used for communicating an air box and a silencer air outlet used for forming an air outlet of the hand dryer are formed in the shell, at least two partition plates are arranged in the silencer shell at intervals, only one end of each partition plate and the inner wall of the silencer shell form air vents, and the air vents of the adjacent partition plates are arranged at the two ends of the partition plates in a staggered mode to form a serpentine airflow channel.

5. A hand dryer according to claim 4, characterised in that: and the baffle plate is provided with a sound absorption layer.

6. A hand dryer according to claim 1, characterised in that: the air outlet of the air box and the air inlet of the air box are arranged in a space of 90 degrees, and the heater of the hand dryer is arranged in the air box; the air inlet of the exhaust silencer and the air outlet of the exhaust silencer are arranged on the same straight line, and the straight line is parallel to the axis of the fan.

7. A hand dryer according to claim 1, characterised in that: the air inlet of the fan is communicated with an air inlet silencer, the air inlet silencer comprises a cylindrical shell, the air inlet silencer is communicated with an air outlet on one end face of the cylindrical shell and is arranged on the air inlet of the fan, an air suction port is arranged on the other end face of the cylindrical shell, and an opening of the air suction port and an opening of the air outlet of the cylindrical shell are both smaller than the through-flow section of the cylindrical shell.

8. A hand dryer according to claim 7, wherein: the air suction port is provided with a cover body for shielding the air suction port to reflect noise, and one side of the cover body facing the base is opened to form an air inlet.

9. A hand dryer according to claim 7, wherein: and the inner peripheral wall surface of the cylindrical shell is annularly provided with a sound absorbing layer.

10. A hand dryer according to any of claims 1-9, characterised in that: and a sound absorption layer is arranged in the shell of the fan in a surrounding manner.