Description
DEVICE FOR BLOWING AIR BY MEANS OF NARROW SLIT NOZZLE ASSEMBLY
FIELD OF THE INVENTION
[0001] The present invention relates to a pumping device
or system for pumping an elastic fluid by a rotary pump, in
particular to a ventilation device or system in which the
working fluid is air, and more particularly to a device for
blowing air by means of a narrow slit nozzle where the jetting
direction of the device can be adjusted in a large range.
BACKGROUND OF THE INVENTION
[0002] A home fan usually includes a rotary shaft, a set
of blades or an impeller rotating around the shaft, and driving
equipment that drives the blades or the impeller to rotate
for generating an air stream. The flow and circulation of air
produces wind, and heat may be dissipated by air convection
to make the user feel cool. The conventional home fan has the
disadvantages that the air stream generated by the rotating
blades or impeller cannot be uniformly sensed by the user,
so the user has a feeling of "patting" generated by the
turbulent airflow. Moreover, the blades occupy a large area
and thus lower the room brightness.
[0003] A bladeless fan, precisely referred to as "a device
for blowing air", includes a base for generating an air stream
and a ring nozzle supported by the base. The ring nozzle defines
an opening, and the nozzle includes an inner passage and a
mouth for jetting the air stream. The base includes an air
intake arranged on the housing of the base and an impeller
inside the base. A discharge portion of the impeller and the
inner passage of the nozzle are respectively in communication
with a pipe in the base. The impeller extracts air through
2
the air intake. The air flows through the pipe in the base
and the inner passage of the nozzle, and then an air stream
is jetted from the mouth of the nozzle. The patent documents
US 2,488,467, CN 201010129999.1, CN 201010129997.2, and
CN 201010129972.2 also disclose other fans or circulators
which are similar to the above. However, the pitch of the fan
or circulator can only be adjusted at a small angle, which
fails to satisfy the requirement for adjusting the direction
of air stream at a large angle. According to CN 201010129972.2,
when the direction of the air stream is adjusted, a hose of
the air passage is deformed, and if the direction of the air
stream is adjusted at a large angle, the air passage will be
blocked. Meanwhile, in most circumstances, the fan operates
by using an electric motor to drive the impeller directly,
but usually the rotational speed of the electric motor cannot
exceed 5000 rpm, which greatly limits the working efficiency.
[0004] In addition, there are a large amount of dust
particles suspended in the air, and dusts are known as the
"killer" of household appliances because the presence thereof
greatly influences the performance of the household
appliances. The granular material suspended in the air is
composed of solid or liquid micro-particles. The particles
suspended in the air include a polydisperse aerosol of solid
particles and liquid particles. The conventional bladeless
fan is not provided with an air fil ter device at the air intake,
so after a long time of use, the dusts in the air adhere to
the impeller, pipes in the base, inner passage, and mouth of
the nozzle. Particularly, the structure inside the bladeless
fan is complicated due to the structure of the impeller and
is hard to disassemble for cleaning. In the absence of the
air filter device, an excessive amount of dust will adhere,
which adds to the load on the electric motor for driving the
impeller and in turn shortens the operational lifespan and
increases the energy consumption. Meanwhile, the excessive
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dust may block the slit of the nozzle so that the nozzle cannot
jet the air stream, which in turn shortens the operational
lifespan of the fan. Also, hazardous organic substances like
formaldehyde, methylamine, benzene, xylene and other
pollutants like the radioactive dust Iodine 131, odour and
bacteria etc. exist in the air, but the conventional bladeless
fan does not have deodorization and air purification
functions.
[0005] In view of the above, the conventional bladeless fan
has obvious inconvenience and defects in use and needs to be
improved and perfected.
SUMMARY OF THE INVENTION
[0006] A technical problem to be solved by this invention
is to provide a foldable device for blowing air provided with
a narrow slit nozzle, which can adjust the direction of air
stream by simple operations and can be folded when it is idle
so as to save the space occupied.
[0007] To solve the above technical problem in the prior
art, a technical solution of this invention is a device for
blowing air by means of a narrow slit nozzle assembly. The
device includes a base seat for generating an air stream to
supply air flow and a narrow slit nozzle assembly supported
by the base seat for blowing air. An airflow passage is
connected between the base seat and the nozzle assembly. An
intake end of the airflow passage is opened on the outer surface
of the base seat, and an output end is connected to the nozzle
assembly by means of a pivot component. An intake end of the
nozzle assembly is connected to an output end of the base seat
by means of the pivot component. An impeller and an electric
motor for driving the impeller to rotate are provided within
the base seat. The nozzle assembly is rotatably fixed on the
base seat by means of the pivot component.
4
[0008] The nozzle assembly is rotatably fixed on the base
seat by means of the pivot component at any orientation.
[0009] The nozzle assembly is rotatably fixed on the base
seat by means of the pivot component at an elevation angle
of 0-360°.
[0010] An air filter assembly is disposed at the opening
of the intake end of the airflow passage on the surface of
the base seat.
[0011] The impeller and the electric motor are coaxially
accommodated in a casing within the base seat to constitute
an air supply assembly for generating an air stream, and an
air filter assembly is installed at the opening of the intake
end of the airflow passage on the casing.
[0012] The air filter assembly is detachably installed at
the opening of the intake end of each airflow passage.
[0013] An air filter assembly is arranged between the
opening of the intake end of the airflow passage on the surface
of the base seat and the casing of the air supply assembly.
[0014] The air filter assembly is a mesh filter, a filter
laminate, or a filter cartridge based on the filter laminate.
[0015] An accelerating transmission mechanism is installed
on an output shaft of the electric motor for driving the
impeller to rotate in the base seat and includes a pulley drive
and a gear pair transmission mechanism.
[0016] The nozzle assembly is overall shaped like a round
or oval ring with a constant section and includes a rectifier
ring for receiving the air stream in an inner cavity of the
assembly and a narrow slit nozzle for blowing air arranged
on an outer ring circumference or an oval circumference.
[0017] The rectifier ring includes a gradually narrowing
tapered area and the narrow slit nozzle for blowing air is
located at a tip of the tapered area.
[0018] A distance between two opposing surfaces for limiting
a width of the narrow slit nozzle for blowing air is 0.2-15.0
5
mm, an angle formed between an air blowing direction of an
air supply part of the nozzle and a central axis of the
rectifier ring is 0.2-20.0°, and the length of the air supply
part in the air blowing direction is 0.2-30.0 mm.
[0019] The two opposing surfaces for limiting the width of
the narrow slit nozzle for blowing air are separated by at
least one partition board extending along the nozzle, and the
partition board is connected to the two opposing surfaces by
a fixing member to form multiple rows of air supply outlets
extending along the nozzle. Two adjacent rows of air supply
outlets are arranged in alignment or in a staggered manner.
Each air supply outlet includes opposing surfaces for limiting
each air supply outlet, the sum of the distances between each
pair of opposing surfaces is 0.2 mm-IS mm, the angle formed
between the air blowing direction of the air supply part of
the nozzle and the central axis of the rectifier ring is
0.2-20.0°, and the length of the air supply part in the air
blowing direction is 0.2-30.0 mm.
[0020] The pivot component includes a T-shaped hollow pipe
installed within the base seat, and two ends of a horizontal
pipe of the T-shaped hollow pipe are in communication with
the intake end of the nozzle assembly. A vertical pipe of the
T-shaped hollow pipe is in communication with the output end
of the base seat. The two ends of the horizontal pipe are
respectively socketed with a flange that rotates around the
horizontal pipe, the flange and the nozzle assembly are fixed
together, so that the nozzle assembly and the flange
simultaneously rotate around the horizontal pipe.
[0021] The pivot component includes a hollow pipe arranged
at the intake end of the nozzle assembly. The hollow pipe and
the nozzle assembly are fixed together, and a sealing member
is arranged between the hollow pipe and an air outlet of the
casing within the base seat, so that the nozzle assembly and
the hollow pipe rotate together.
6
• [0022] A sealing member is arranged between the flange or
the hollow pipe and the casing within the base seat.
[0023] A circlip is arranged on the flange or the hollow
pipe to prevent the nozzle assembly from disengaging from the
casing within the base seat.
[0024] The pivot component is connected with an assembly
that facilitates smooth rotation of the nozzle assembly, and
the assembly includes a spring fixed in the casing of the base
seat and roller balls placed on the spring. A rounded toothed
connecting section is arranged on the outer circumference of
the flange, and the roller balls rest against each concave
portion of the toothed connecting section, thereby
facilitating smooth rotation of the nozzle assembly around
the horizontal pipe.
[0025] The pivot component is connected with a plastic part
that facilitates smooth rotation of the nozzle assembly,
protrusions are arranged at the plastic part corresponding
to the rounded toothed connecting section of the flange, and
the protrusions rest against each concave portion of the
toothed connecting section, thereby facilitating smooth
rotation of the nozzle assembly around the horizontal pipe.
[0026] A sealing member is arranged between the flange and
the horizontal pipe, and a fastener is connected between the
flange and the nozzle assembly.
[0027] A secondary electric motor for controlling pitch
rotation of the nozzle assembly and at least one drive wheel
connected to the output shaft of the secondary electric motor
are provided in the casing wi thin the base seat, and the drive
wheel when engaged with the pivot component makes the nozzle
assembly rotate smoothly.
[0028] The electric motor and the impeller constitute the
air supply assembly of the device for blowing air, the air
supply assembly is accommodated in a casing, and the casing
is fixed within the base seat by a damping mechanism.
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[0029] The impeller and the electric motor are both
accommodated in a casing to constitute an air supply assembly,
and a shock-absorption connecting member is arranged between
the casing and the intake end of the airflow passage.
[0030] The device for blowing air further includes a swing
motor disposed within the base seat for driving the nozzle
assembly to rotate in the horizontal direction to adjust
azimuth. The swing motor is connected to a transmission arm,
thereby driving a rotary shaft connected with the transmission
arm to rotate and finally making the nozzle assembly rotate
on a horizontal plane along with an upper part of the base
seat on which the nozzle assembly is fixed.
[0031] The base seat is provided with a connecting member
for fixing the device for blowing air in place.
[0032] A housing of the base seat is provided with a fixing
component for fixing the device for blowing air in place.
[0033] The device for blowing air further includes a USB
port arranged on the base seat, comprising a standard or a
mini-USB port.
[0034] The upper part of the base seat, in which the air
supply assembly is fixed, obtains power to drive the air supply
assembly from a lower part of the base seat by means of a
double-pole coaxial slip ring that can slideably rotate at
a rotation centre on the bottom.
[0035] An airflow passage is connected between the nozzle
assembly and the base seat in this invention. An intake end
of the airflow passage is opened on the outer surface of the
base seat, and an output end is connected to the nozzle assembly
by means of a pivot component. The base seat supplies an air
stream to the nozzle assembly by way of the airflow passage.
Two pivot components are connected between the nozzle assembly
and the base seat, and the nozzle assembly is rotatably
connected to the base seat by the two pivot components, thereby
realizing pitch rotation of the nozzle assembly around base
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seat at a large angle and satisfying the demands for adjustment
of jet direction of the air stream. Furthermore, when the
device for blowing air is idle, the nozzle assembly can be
rotated and folded to a flat state so as to save space.
BRIEF DESCRIPTION OF THE DRAWINGS
[0036] Fig. 1 is a schematic perspective view illustrating
the structure of a foldable bladeless fan of the present
invention;
[0037] Fig. 2A is a schematic cross-sectional side view
illustrating the structure of the foldable bladeless fan of
the present invention;
[0038] Fig. 2B is a partial enlarged view of the structure
in Fig. 2A;
[0039] Fig. 3A is a cross-sectional front view illustrating
the structure of the foldable bladeless fan of the present
invention;
[0040] Fig. 3B is a partial enlarged view of the structure
in Fig. 3A;
[0041] Fig. 4 is a schematic front view illustrating the
structure of the foldable bladeless fan of the present
invention;
[0042] Fig. 5A is a schematic structural view illustrating
a first state of an embodiment of the present invention;
[0043] Fig. 5B is a schematic structural view illustrating
a second state of an embodiment of the present invention;
[0044] Fig. 5C is a schematic structural view illustrating
a third state of an embodiment of the present invention;
[0045] Fig. 6 is a schematic view of the structure inside
a base seat of the present invention;
[0046] Fig. 7 is a partial enlarged schematic structural
view illustrating a nozzle in an embodiment of the present
invention;
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[0047] Fig. 8 is a partial enlarged schematic structural
view illustrating a nozzle in another embodiment of the
present invention;
[0048] Fig. 9 is a partial enlarged view illustrating air
supply outlets and a partition board in Fig. 8;
[0049] Fig. 10 is a cross-sectional front view illustrating
the structure in another embodiment of the present invention;
[0050] Fig. 11 is a schematic view illustrating a rotation
adj ustment structure of a base seat of the foldable bladeless
fan of the present invention;
[0051] Fig. 12 is a schematic view illustrating a hanging
structure of an embodiment of the present invention;
[0052] Fig. 13A is a schematic view illustrating a partial
structure of another embodiment of the present invention; and
[0053] Fig. 13B is a schematic partial enlarged view
illustrating the structure in Fig. 13A.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0054] To make the obj ectives, technical solutions and
advantages of this invention understandable clearly, the
invention is described in further detail below in conj unction
with the drawings and embodiments. It should be understood
that the embodiments are described for explaining this
invention only and are not intended to limit the scope of this
invention.
[0055] Referring to Figs. 1-4, a device 100 for blowing air
by means of a narrow slit nozzle assembly is provided. The
device includes a base seat 10 for generating an air stream
to supply air flow and a narrow slit nozzle assembly 20
supported by the base seat 10 for blowing air. An airflow
passage is connected between the base seat 10 and the nozzle
assembly 20. An intake end of the airflow passage is opened
on the outer surface of the base seat 10, and an output end
10
of the airflow passage is connected to the nozzle assembly
20 by means of a pivot component 21. An intake end of the nozzle
assembly 20 is connected to an output end of the base seat
10 by means of the pivot component 21. An impeller 13 and an
electric motor 12 for driving the impeller 13 to rotate are
provided within the base seat 10. The nozzle assembly 20 is
rotatably fixed on the base seat 10 by means of the pivot
component 21.
[0056] The nozzle assembly is rotatably fixed on the base
seat by means of the pivot component at any orientation. In
particular, the nozzle assembly is rotatably fixed on the base
seat by means of the pivot component at an elevation angle
of 0-360°.
[0057] In practical use, the air stream generated by the
base seat 10 is continuously injected into the nozzle assembly
20 through the airflow passage, so as to form a jetting air
stream. In an embodiment of this invention, the base seat 10
is provided with a casing 11 therein, and an electric motor
12 and an impeller 13 connected to a rotary shaft of the
electric motor 12 are accommodated in the casing 11. The
electric motor 12 when rotating drives the impeller 13 to
rotate, so as to generate the air stream. The impeller 13 and
the electric motor 12 are coaxially accommodated in the casing
within the base seat 10 to constitute an air supply assembly
for generating an air stream, and an air filter assembly is
installed at the opening of the intake end of the airflow
passage on the casing.
[0058] The pivot component 21 includes a T-shaped hollow
pipe installed in the base seat 10, and two ends 32 of a
horizontal pipe of the T-shaped hollow pipe are in
communication with the intake end of the nozzle assembly 20.
An intake end 31 of a vertical pipe of the T-shaped hollow
pipe is in communication with the output end of the base seat.
The two ends 32 of the horizontal pipe are respectively
11
socketed with a flange that is rotatable around the horizontal
pipe, and the flange and the nozzle assembly 20 are fixed
together, so that the nozzle assembly 20 and the flange rotate
around the horizontal pipe together. A sealing member is
arranged between the flange and the horizontal pipe, and a
fastener is connected between the flange and the nozzle
assembly.
[0059] In another embodiment, the pivot component 21
includes a hollow pipe arranged at the intake end of the nozzle
assembly 20. The hollow pipe and the nozzle assembly are fixed
together, and a sealing member is arranged between the hollow
pipe and an air outlet of the casing within the base seat,
so that the nozzle assembly and the hollow pipe rotate
together.
[0060] Preferably, sealing member is arranged between the
flange or the hollow pipe and the casing within the base seat
to prevent the air stream out of the air supply assembly from
escaping and influencing the air supply efficiency.
[0061] A circlip is arranged on the flange or the hollow
pipe to prevent the nozzle assembly from disengaging from the
casing within the base seat.
[0062] The casing 11 is connected to the intake end 31 by
a connecting pipe 14, the connecting pipe 14 is fixed on the
base seat 10, and the nozzle assembly 20 is connected to two
ends 32 of the horizontal pipe of the T-shaped hollow pipe.
With the above connection structure, the air stream generated
in casing 11 enters the intake end 31 of the vertical pipe
through the connecting pipe 14, and then enters the nozzle
assembly 20 through the two ends 32 of the horizontal pipe
to be jetted. The air stream that enters the nozzle assembly
20 follows Bernoulli's principle, that is, when the impeller
13 drives air to generate the air stream, the air stream enters
a ring passage of the nozzle assembly 20 through the two ends
32 of the horizontal pipe and then is jetted from the nozzle
12
assembly 20 to form the jetting air stream. It should be
explained that a pivot component 21 is arranged at the points
of connection between the nozzle assembly 20 and the two ends
32 of the horizontal pipe, and the nozzle assembly 20 is
rotatably connected to the two ends 32 of the horizontal pipe
by the pivot component 21, so as to realize the pitch rotation
of the nozzle assembly 20 around the horizontal pipe at a large
angle, and thus the device 100 for blowing air by means of
the narrow slit nozzle assembly can output the air stream to
a user at multiple orientations and at any position. With
reference to Figs. SA-SC, the device can be placed on a floor,
table, and vertical wall by simply adj usting the installation
orientation and the pitch angle of the nozzle assembly 20.
Meanwhile, when the device 100 for blowing air by means of
the narrow slit nozzle assembly is idle, the angle of the nozzle
assembly 20 can be adjusted to lie flat around the periphery
of the base seat 10 so as to further save space. Preferably,
a sealing ring 22 is arranged at the points of connection
between the flanges and the two ends 32 of the horizontal pipe
for enclosing the air stream to achieve a better air stream
circulation effect. At the same time, the pivot component 21
is connected with an assembly 23 that facilitates smooth
rotation of the nozzle assembly, and the assembly 23 includes
a spring fixed in the casing of the base seat and roller balls
placed on the spring, as shown in Figs. 2B and 3B. A rounded
toothed connecting section is arranged on the outer
circumference of the flange, and the roller balls rest against
each concave portion 27 of the toothed connecting section,
thereby facilitating smooth rotation of the nozzle assembly
around the horizontal pipe.
[0063] The pivot component 21 is connected with a plastic
part that facilitates smooth rotation of the nozzle assembly,
protrusions are arranged at the plastic part corresponding
to the rounded toothed connecting section of the flange, and
13
the protrusions rest against each concave portion 27 of the
toothed connecting section, thereby facilitating smooth
rotation of the nozzle assembly around the horizontal pipe.
[0064] Referring to the embodiment as shown in Fig. 2A again,
an air filter assembly 151 is arranged at the opening 15 of
the intake end of the airflow passage on the surface of the
base seat 10.
[0065] In another embodiment, the impeller 13 and the
electric motor 12 are coaxially accommodated in a casing
within the base seat 10 to constitute an air supply assembly
for generating an air stream, and an air filter assembly is
installed at the opening of the intake end of the airflow
passage on the casing.
[0066] Of course, the air filter assembly may be arranged
between the opening of the intake end of the airflow passage
on the surface of the base seat 10 and the casing of the air
supply assembly.
[0067] Preferably, the air filter assembly is detachably
installed at the opening of the intake end of each airflow
passage, for the convenience of cleaning and replacement in
time when there is a large amount of dust adhering to the air
fil ter assembly to realize the repetitive use of the air filter
assembly. Obviously, the air filter assembly can also be fixed
at the opening of the intake end of each airflow passage.
[0068] The air filter assembly is a mesh filter, a filter
laminate or a filter cartridge based on the filter laminate.
[0069] Preferably, the impeller 13 is provided with a
protective cover 131 outside for reducing noise generated when
the impeller 13 is operating. As shown in the figure, F
indicates the direction of air flow. The air filter device
151 may be an automatic, centrifugal, electrostatic, pulse
filter device, or air filter. Obviously, any filter devices
that can achieve the effect of filtering air and reducing the
amount of dust getting into the device 100 for blowing air
14
still fall within the protective scope of the present
invention. Therefore, the present invention can reduce the
amount of dust getting into the fan, prevent the dust from
adhering to the components inside the fan, guarantee unimpeded
flow in the airflow passage of the fan and keep the interior
of the fan clean, so that the device 100 for blowing air has
an extended operational lifespan.
[0070] Fig. 6 is a schematic view of the structure inside
the base seat 10 of another embodiment of the present invention.
Referring to Fig. 6, an accelerating transmission mechanism
is installed on an output shaft of the electric motor 12 for
driving the impeller 13 to rotate in the base seat 10 and
includes a pulley drive and a gear pair transmission mechanism.
Specifically, the base seat 10 is provided with a transmission
mechanism 16 inside that enables the electric motor 12 and
the impeller 13 to have different rotational speeds, and the
electric motor 12 and the impeller 13 are connected by the
transmission mechanism 16. The transmission mechanism 16 has
a fixed transmission ratio that enables the rotational speed
of the impeller 13 to be higher than that of the electric motor
12. A small rotational speed of the electric motor 12 can
achieve a large rotational speed of the impeller 13, thereby
lowering the requirement for the electric motor 12. The
electric motor 12 can achieve a noise reduction effect by
choosing an ordinary electric motor of low cost, and thus a
high-cost brushless DC electric motor becomes unnecessary.
Therefore, the present invention reduces the cost of the
device 100 for blowing air.
[0071] The transmission mechanism 16 includes a first
transmission part 161, a second transmission part 162, and
a transmission belt 163. The transmission belt 163 is fitted
on the first transmission part 161 and the second transmission
part 162, so that the transmission belt 163 forms a
transmission relation between the first transmission part 161
15
and the second transmission part 162. When the first
transmission part 161 rotates, the second transmission part
162 is driven by the transmission belt 163 to rotate. The first
transmission part 161 is coaxially connected to the drive
shaft of the electric motor 12, and the second transmission
part 162 is connected to the rotary shaft of impeller 13.
Therefore, when the bladeless fan 100 operates, the electric
motor 12 drives the first transmission part 161 to rotate,
and the second transmission part 162 also rotates by means
of the transmission relation between the first transmission
part 161 and the second transmission part 162 and drives the
impeller 13 to rotate. Meanwhile, the transmission ratio of
the first transmission part 161 and the second transmission
part 162 needs to be greater than 1, so as to guarantee that
the electric motor 12 at a small rotational speed drives the
impeller 13 to develop a large rotational speed. Obviously,
the first transmission part 161 and the second transmission
part 162 may be connected in other ways such as teeth engagement
in which a gear is used to drive the impeller 13 to rotate,
or the two directly rest against each other and the impeller
13 is driven to rotate by frictional resistance. Of course,
the two transmission parts may be connected by belt or chain
to form the driving assembly. In this embodiment, the
rotational speed of the electric motor 12 is no more than 5000
rpm, and the rotational speed of the impeller 13 is no more
than 30000 rpm. Referring to Fig. 7, the nozzle assembly 20
is overall shaped like a round or oval ring with a constant
section and includes a rectifier ring 24 for receiving the
air stream in the assembly inner cavity and a narrow slit nozzle
25 for blowing air arranged on an outer ring circumference
or an oval circumference.
[0072] The rectifier ring 24 includes a gradually narrowing
tapered area 250 and the narrow slit nozzle for blowing air
25 is located at a tip of the tapered area 250. In this
16
embodiment, the distance between two opposing surfaces for
limiting a width of the narrow slit nozzle for blowing air
25 is 0.2-15.0 mm, the angle formed between the air blowing
direction of the air supply part of the nozzle and the central
axis of the rectifier ring is 0.2-20.0°, and the length of the
air supply part in the air blowing direction is 0.2-30.0 mm.
[0073] Fig. 8 is an enlarged schematic view illustrating
a partial structure of the nozzle assembly 20 in another
embodiment of the present invention. Referring to Fig. 8, the
two opposing surfaces for limiting the width of the narrow
slit nozzle for blowing air 25 are separated by at least one
partition board extending along the nozzle, and the partition
board is connected to the two opposing surfaces by a fixing
member to form mul tiple rows of air supply outlets extending
along the nozzle. Two adj acent rows of air supply outlets are
arranged in alignment or in a staggered manner. Each air supply
outlet includes opposing surfaces for limiting each air supply
outlet, the sum of the distances between each pair of opposing
surfaces is 0.2 mm-15 mm, the angle formed between the air
blowing direction of the air supply part of the nozzle and
the central axis of the rectifier ring is 0.2-20.0°, and the
length of the air supply part in the air blowing direction
is 0.2-30.0 mm. Specifically, the nozzle 25 includes two
limiting walls 251 and 252 for limiting the width of the nozzle
25. The two limiting walls 251 and 252 are separated by at
least one partition board 253 extending along the nozzle 25,
and the partition board 253 is connected to the two limiting
walls 251 and 252 of the nozzle 25 by the fixing member, thereby
forming multiple rows of air supply outlets 26 (in a grille
design) extending along the nozzle 25. The fixing member,
partition board 253 and the two limiting walls 251 and 252
of the nozzle 25 are integrally formed. The air supply outlets
26 may be arranged in two or multiple rows; moreover, the
multiple rows of air supply outlets 26 jet air streams at the
17
same time, so that the air stream jetted by the nozzle 25
substantially forms an annular shape, thereby generating a
more even and soft air stream with a large area. The air supply
outlets 26 include opposing surfaces 261 and 262 for limiting
the outlets; the sum of distances between the opposing
surfaces of the multiple rows of air supply outlets 26 is
preferably 0.2 mm-15 mm, and the angle formed between the
air supply outlets 26 and the axis X of the rectifier ring
24 is preferably 0.2-20°. The length of the air supply outlets
26 is preferably 0.2 mm-30 mm. The air streams jetted by the
multiple rows of air supply outlets 26 are forced to converge
on the axis X under guidance, so the air stream generated by
the nozzle assembly 20 is jetted forwards substantially in
the form of a ring or annular shape and the air stream is more
concentrated, thereby reducing the loss of the energy and
speed of the air stream, and the user when located far from
the bladeless fan 100 can still enjoy the cool air.
[0074] Preferably, in the base seat 10 with reference to
Fig. 2A, the electric motor 12 and impeller 13 are both
accommodated in the casing 11 to form an air supply assembly,
and a shock-absorption connecting member is arranged between
the casing 11 and the intake end of the airflow passage.
Specifically, the casing 11 is connected to the intake end
31 by the connecting pipe 14, and a buffering connecting member
141 for buffering shock is connected at the position where
the casing 11 and the connecting pipe 14 are connected, and
thus the connecting pipe 14 and the casing 11 are connected
in a better way. Preferably, the casing 11 is fixed within
the base seat 10 by a shock-absorption mechanism 111. When
the electric motor 12 is operating, the base seat 10 is
prevented from shaking severely and generating large noise.
[0075] Fig. 10 is a schematic structural view illustrating
the device 100 for blowing air of another embodiment of this
invention. A secondary electric motor 17 for controlling pitch
18
rotation of the nozzle assembly 20 and at least one drive wheel
171 connected to the output shaft of the secondary electric
motor 17 are provided in the casing within the base seat 10,
and the drive wheel 171 when engaged with the pivot component
21 makes the nozzle assembly 20 rotate smoothly. More
specifically, in this embodiment, a secondary electric motor
17 and a drive wheel 171 connected to the secondary electric
motor 17 are provided in the base seat 10, and the drive wheel
171 rests against the pivot component 21 of the nozzle assembly
20. The secondary electric motor 17 when operating drives the
drive wheel 171 to rotate and in turn drive the pivot component
21 to rotate, thereby achieving the pitch rotation of the
nozzle assembly 20. The user can control the pitch of the nozzle
assembly 20 by simply using a control (remote control) button
of the secondary electric motor 17 without any other effort.
[0076] The device 100 for blowing air further includes a
swing motor 40 disposed in the base seat 10 for driving the
nozzle assembly 20 to rotate in the horizontal direction to
adjust the azimuth. The swing motor 40 is connected to a
transmission arm 41, thereby driving a rotary shaft connected
with the transmission arm 41 to rotate and finally making the
nozzle assembly 20 rotate on a horizontal plane along with
an upper part of the base seat on which the nozzle assembly
20 is fixed. Referring to Fig. 11 for details, the transmission
arm 41 is connected to the rotary shaft 42, and when the swing
motor 40 is controlled to operate, the swing motor 40 drives
the transmission arm 41 to rotate in an arc and further drives
the rotary shaft 42 to rotate, so that the upper part of the
base seat 10 drives the nozzle assembly 20 to rotate on a
horizontal plane.
[0077] The base seat of the device 100 for blowing air
according to this invention is provided with a connecting
member for fixing the device for blowing air in place, so that
the device 100 for blowing air according to this invention
19
may be placed on a floor, table, and vertical installment body.
In other words, a housing of the base seat 10 is provided with
a fixing component for fixing the device 100 for blowing air
in place; as shown in Fig. 12, it is fixed on the wall by a
buckle member 50. Obviously, the fixing component may also
be a screw, bracket, or the like.
[0078] Of course, this invention is not limited to the above
structure. Referring to Figs. 13A and 13B, the profile of the
deformed horizontal pipe of the T-shaped pipe is substantially
a semicircle that matches the lower part of the nozzle assembly
20. The two discharge ends 32 of the semicircular passage are
respectively provided with the pivot component 21, and the
nozzle assembly 20 is rotatably disposed on the two discharge
ends 32 of the semicircular passage by means of the pivot
components 21. In this embodiment, the nozzle assembly 20 can
rotate freely in a range of 3600 around the pivot component
21 that is taken as the axis of rotation, so that the device
100 for blowing air can output the air stream for the user
at any orientation and any position.
[0079] In another embodiment, this invention further
includes a USB port arranged on the base seat, comprising a
standard or a mini-USB port.
[0080] In still another embodiment, the upper part of the
base seat 10, in which the air supply assembly is fixed, obtains
power from the lower part of the base seat to drive the air
supply assembly by means of a double-pole coaxial slip ring
that can slideably rotate at a rotation centre on the bottom.
[0081] In summary, this invention realizes the pitch
rotation of the nozzle assembly 20 around the base seat 10
at a large angle, thereby satisfying the demands for
adj ustment of jetting direction of the air stream. Moreover,
when the device for blowing air is idle, the nozzle assembly
can be rotated and folded to a flat state so as to save space.
[0082] There are certainly many other embodiments for the
20
present invention. Those skilled in the art can make various
corresponding changes and variants based on the present
invention, without departing from the spirit and nature of
the present invention. However, these corresponding changes
and variants should fall into the protective scope of the
claims as attached.

We claim:
1. A device for blowing air by means of a narrow slit
nozzle assembly, comprising a base seat for generating
an air stream to supply air flow and a narrow slit nozzle
assembly supported by the base seat for blowing air,
wherein an airflow passage is connected between the base
seat and the nozzle assembly, an intake end of the airflow
passage is opened on an outer surface of the base seat,
and an output end of the airflow passage is connected to
the nozzle assembly by means of a pivot component; an
intake end of the noz zle assembly is connected to an output
end of the base seat by means of the pivot component; an
impeller and an electric motor for driving the impeller
to rotate are provided within the base seat, and the nozzle
assembly is rotatably fixed on the base seat by means of
the pivot component.
2. The device for blowing air of claim 1,
characterized in that the nozzle assembly is rotatably
fixed on the base seat by means of the pivot component
at any orientation.
3. The device for blowing air of claim 1,
characterized in that the nozzle assembly is rotatably
fixed on the base seat by means of the pivot component
at an elevation angle of 0-360°.
4. The device for blowing air of claim 1,
characterized in that an air filter assembly is arranged
at an opening of the intake end of the airflow passage
22
on the surface of the base seat.
5. The device for blowing air of claim 1,
characterized in that the impeller and the electric motor
are coaxially accommodated in a casing within the base
seat to constitute an air supply assembly for generating
an air stream, and an air filter assembly is installed
at an opening of the intake end of the airflow passage
on the casing.
6. The device for blowing air of claim 4 or 5,
characterized in that the air filter assembly is
detachably installed at the opening of the intake end of
each airflow passage.
7. The device for blowing air of claim 4 or 5,
characterized in that an air filter assembly is arranged
between the opening of the intake end of the airflow
passage on the surface of the base seat and the casing
of the air supply assembly.
8. The device for blowing air of anyone of claims 4
to 7, characterized in that the air filter assembly is
a mesh filter, a filter laminate, or a filter cartridge
based on the filter laminate.
9. The device for blowing air of claim 1,
characterized in that an accelerating transmission
mechanism is installed on an output shaft of the electric
motor for driving the impeller to rotate in the base seat
23
and includes a pulley drive and a gear pair transmission
mechanism.
10. The device for blowing air of claim 1,
characterized in that the nozzle assembly is overall
shaped like a round or oval ring with a constant section
and includes a rectifier ring for receiving the air stream
in an inner cavity of the assembly and a narrow slit nozzle
for blowing air arranged on an outer ring circumference
or an oval circumference.
11. The device for blowing air of claim 10,
characterized in that the rectifier ring includes a
gradually narrowing tapered area and the narrow slit
nozzle for blowing air is located at a tip of the tapered
area.
12. The device for blowing air of claim 11,
characterized in that a distance between two opposing
surfaces for limiting a width of the narrow slit nozzle
for blowing air is 0.2-15.0 mm, an angle formed between
an air blowing direction of an air supply part of the nozzle
and a central axis of the rectifier ring is 0.2-20.0°, and
a length of the air supply part in the air blowing direction
is 0.2-30.0 mm.
13. The device for blowing air of claim 11,
characterized in that two opposing surfaces for limiting
the width of the narrow slit nozzle for blowing air are
separated by at least one partition board extending along
24
the nozzle, and the partition board is connected with the
two opposing surfaces by a fixing member to form mul tiple
rows of air supply outlets extending along the nozzle;
two adjacent rows of air supply outlets are arranged in
alignment or in a staggered manner; each air supply outlet
includes opposing surfaces for limiting each air supply
outlet, the sum of distances between each pair of opposing
surfaces is 0.2 rom-IS rom, an angle formed between the air
blowing direction of the air supply part of the nozzle
and the central axis of the rectifier ring is 0.2-20.0°,
and the length of the air supply part in the air blowing
direction is 0.2-30.0 mm.
14. The device for blowing air of claim 1,
characterized in that the pivot component includes a
T-shaped hollow pipe installed within the base seat, two
ends of a horizontal pipe of the T-shaped hollow pipe are
in communication with the intake end of the nozzle
assembly; a vertical pipe of the T-shaped hollow pipe is
in communication with the output end of the base seat;
the two ends of the horizontal pipe are respectively
socketed wi th a flange that rotates around the horizontal
pipe, and the flange and the nozzle assembly are fixed
together, so that the nozzle assembly and the flange rotate
around the horizontal pipe together.
15. The device for blowing air of claim 1,
characterized in that the pivot component includes a
hollow pipe arranged at the intake end of the nozzle
assembly, the hollow pipe and the nozzle assembly are fixed
25
together, and a sealing member is arranged between the
hollow pipe and an air outlet of a casing wi thin the base
seat, so that the nozzle assembly and the hollow pipe
rotate together.
16. The device for blowing air of claim 14 or 15,
character i zed in that a sealing member is arranged between
the flange or the hollow pipe and the casing within the
base seat.
17. The device for blowing air of claim 14 or 15,
characterized in that a circlip is arranged on the flange
or the hollow pipe to prevent the nozzle assembly from
disengaging from the casing within the base seat.
18. The device for blowing air of claim 14,
characterized in that the pivot component is connected
with an assembly that facilitates smooth rotation of the
noz zle assembly and includes a spr ing fixed in the cas ing
of the base seat and roller balls placed on the spring;
a rounded toothed connecting section is arranged on the
outer circumference of the flange, and the roller balls
rest against each concave portion of the toothed
connecting section, thereby facili tating smooth rotation
of the nozzle assembly around the horizontal pipe.
19. The device for blowing air of claim 14,
characterized in that the pivot component is connected
with a plastic part that facilitates smooth rotation of
the nozzle assembly, protrusions are arranged at the
26
plastic part corresponding to the rounded toothed
connecting section of the flange, and the protrusions rest
against each concave portion of the toothed connecting
section, thereby facilitating smooth rotation of the
nozzle assembly around the horizontal pipe.
20. The device for blowing air of claim 14 or 15,
characterized in that a sealing member is arranged between
the flange and the horizontal pipe, and a fastener is
connected between the flange and the nozzle assembly.
21. The device for blowing air of claim 1,
characterized in that a secondary electric motor for
controlling pitch rotation of the nozzle assembly and at
least one drive wheel connected to an output shaft of the
secondary electric motor are provided in a casing wi thin
the base seat, and an engagement of the drive wheel with
the pivot component makes the nozzle assembly rotate
smoothly.
22. The device for blowing air of claim 1,
characterized in that the electric motor and the impeller
consti tute an air supply assembly of the device for blowing
air, the air supply assembly is accommodated in a casing,
and the casing is fixed within the base seat through a
damping mechanism.
23. The device for blowing air of claim 1,
characterized in that the impeller and the electric motor
are both accommodated in a casing to constitute an air
27
supply assembly, and a shock-absorption connecting member
is arranged between the casing and the intake end of the
airflow passage.
24. The device for blowing air of claim 1,
characterized by further comprising a swing motor
disposed wi thin the base seat for driving the noz zle
assembly to rotate in the horizontal direction to adjust
azimuth, wherein the swing motor is connected to a
transmission arm, thereby driving a rotary shaft
connected with the transmission arm to rotate and finally
making the nozzle assembly rotate on a horizontal plane
along with an upper part of the base seat on which the
nozzle assembly is fixed.
25. The device for blowing air of claim 1,
characterized in that the base seat is provided with a
connecting member for fixing the device for blowing air
in place.
26. The device for blowing air of claim 24,
characterized in that a housing of the base seat is
provided with a fixing component for fixing the device
for blowing air in place.
27. The device for blowing air of claim 1,
characterized by further comprising a USB port arranged
on the base seat, comprising a standard or a mini-USB port.
28. The device for blowing
28
air of claim 24,
characterized in that the upper part of the base seat,
in which the air supply assembly is fixed, obtains power
to drive the air supply assembly from a lower part of the
base seat by means of a double-pole coaxial slip ring
capable of slideably rotating at a rotation centre on the
bottom.