WO2021164566A1

WO2021164566A1 - Fan

Info

Publication number: WO2021164566A1
Application number: PCT/CN2021/075267
Authority: WO
Inventors: 应辉
Original assignee: 应辉
Priority date: 2020-02-19
Filing date: 2021-02-04
Publication date: 2021-08-26

Abstract

Disclosed is a fan comprising a body part (10) and a nozzle (7). The body part comprises an air inlet, an air outlet, and a fan electric motor assembly (5) for generating an airflow, the airflow passing through the body part (10) in a first direction. The nozzle comprises an air output channel (72), air inlets (74, 75), an air outlet (71), and at least one positive air blocking wall (73), wherein the air inlets (74, 75) receive the airflow from the body part (10), the airflow being transmitted to the air outlet (71) by means of the air output channel and then being emitted therefrom; the positive air blocking wall (73) blocks part of the airflow flowing to the air outlet (71), and adjusts an air output angle of the airflow ejected from the air outlet (71); and as the airflow enters the nozzle (7), the airflow moves at least on the basis of a second direction opposite to the first direction and is then emitted from the nozzle (7). By means of the fan structure, the direction of movement of the airflow inside the fan can be changed, such that the overall height of the fan is reduced, the overall volume is reduced, the air output angle is flexibly adjusted, and noise during use and usage costs are reduced.

Description

fan

Technical field

The invention relates to the field of air conditioning equipment, in particular to fans.

Background technique

With the continuous improvement of the standard of living and science and technology, the people's requirements for the quality of life are increasing, and indoor air quality has become an important issue that people are concerned about. Especially with the emergence of smog and PM2.5 problems in recent years, people's demand for air purifiers is also increasing.

Air purifiers are small household appliances used to purify indoor air, mainly to solve indoor air pollution problems caused by decoration or other reasons. Because the release of pollutants in indoor air is persistent and uncertain, the use of air purifiers to purify indoor air is an internationally recognized method to improve indoor air quality. There are many different technologies and media in the air purifier, which enable it to provide users with clean and safe air. Commonly used air purification technologies include: low-temperature asymmetric plasma air purification technology, adsorption technology, negative ion technology, negative oxygen ion technology, molecular complex technology, nano-TiO2 technology, HEPA high efficiency filtration technology, electrostatic dust collection technology, active oxygen technology, etc. ; Material technology mainly includes: photocatalyst, activated carbon, synthetic fiber, HEPA high-efficiency material, etc. The cost of high-quality filter will account for 20% to 30% of the total cost of the air purifier.

At present, there have been many bladeless fans with air filters. Fig. 1 is a cross-sectional view of a bladeless fan in the prior art. As shown in FIG. 1, most of them have an annular nozzle 901, a housing 903, a base 904, a filter screen 905, a fan motor 906 and a mesh inner container 907. Wherein, the housing 903 with the air inlet mesh is set on the base 904, the housing 903 is provided with a filter screen 905, the filter screen 905 is provided with a mesh liner 907, and the mesh liner 907 is provided with the first fan motor 906. An air inlet and the annular nozzle 901 are all arranged above the direction of gravity of the fan motor 906, and the air outlet of the fan motor 906 is connected to the nozzle 901. The indoor air is filtered by the mesh of the housing 903 and the filter 905 in turn, and then enters the mesh liner 907. The air inlet of the fan motor 906 sucks air in the anti-gravity direction and then continues to be delivered to the annular nozzle 901 in the anti-gravity direction (vertical upward). Then, after the air spreads around the annular nozzle 901, it is sprayed out.

In this structure, there are at least the following technical problems that need to be improved:

(1) Since the annular nozzle and fan motor with the largest total volume of the bladeless fan must be arranged at different heights in the direction of gravity, the overall height of the bladeless fan is difficult to reduce, which greatly limits the use scenarios of the bladeless fan.

(2) The center of the annular nozzle is hollow, and this area is not fully utilized, which causes a waste of the overall volume of the fan and increases the cost of product transportation and product storage.

(3) Due to the low position of the air inlet of the fan motor, it will be easier to suck in the dust on the ground when inhaling, which increases the use load of the filter, and requires more frequent replacement of the filter, which significantly increases the bladeless fan The cost of use.

(4) The shell of this type of bladeless fan is a structure in which two shells are aligned horizontally, and each shell is provided with a filter screen. The filter screen is sealed between the three-dimensional sealing tape arranged downstream and the mesh inner liner. The cost of the three-dimensional sealing tape is extremely high, and the sealing effect is poor after long-term use.

(5) When replacing the filter, it is necessary to disassemble the two shells and replace the filter respectively and then install it back. The process is cumbersome and the user-friendly experience is poor.

(6) It is difficult to add other functional modules to the product, and its scalability is poor.

Summary of the invention

In view of the problems in the prior art, the purpose of the present invention is to provide a fan that overcomes the defects of the prior art, can change the direction of movement of the air flow in the fan, reduce the overall height of the fan, reduce the overall volume, and flexibly adjust the output The wind angle prolongs the service life of the filter and reduces the noise and cost of use.

An embodiment of the present invention provides a fan, including:

The body includes an air inlet, an air outlet, and a fan motor assembly for generating an air flow that passes through the body in a first direction; and

The nozzle includes an output air channel, an air inlet, an air outlet, and at least one positive wind retaining wall. The air inlet receives air flow from the body, transmits the air flow through the output air channel to the air outlet, and emits the air flow, The positive wind retaining wall blocks part of the air flow to the air outlet, and adjusts the air outlet angle of the air flow ejected from the air outlet;

Following the air flow into the nozzle, the air flow is emitted out of the nozzle after moving at least in a second direction opposite to the first direction.

In some embodiments, the positive wind retaining wall is disposed on the inner wall of the outlet air duct and on the same side of the air outlet, and the positive wind retaining wall is located upstream of the air outlet.

In some embodiments, the plane on which the positive wind retaining wall is located is perpendicular to the guiding direction of the outlet air passage.

In some embodiments, the nozzle further includes a rotating member for adjusting the angle between the positive wind retaining wall and the guiding direction of the output air passage.

In some embodiments, the rotating member is disposed on the inner wall of the output air passage and on the same side as the air outlet, and the rotating member is connected to the positive wind barrier wall.

In some embodiments, as the positive wind retaining wall blocks more of the air flow, the angle between the direction of the air flow ejected from the air outlet and the axis of the air outlet decreases.

In some embodiments, as the positive wind retaining wall blocks less air flow, the angle between the direction of the air flow ejected from the air outlet and the axis of the air outlet increases.

In some embodiments, a plurality of positive wind retaining walls are sequentially provided in the output air passage along the guiding direction of the output air passage.

In some embodiments, along the guiding direction of the output air passage, the height of the positive wind retaining wall increases sequentially.

In some embodiments, the air outlet is provided with a retracted shoulder, and the retracted depth of the retracted shoulder is less than the height of the positive wind barrier.

In some embodiments, the recessed depth of the recessed shoulder is 5 mm to 12 mm, and the height of the positive windshield wall is 15 mm to 25 mm.

In some embodiments, the recessed depth of the recessed shoulder is 7 mm, and the height of the positive wind retaining wall is 18.5 mm.

In some embodiments, the shape of the nozzle is an inverted U shape, and two air inlets of the nozzle are respectively connected to two sides of the body.

The fan of the present invention can change the movement direction of the air flow in the fan, reduce the overall volume, and reduce the use cost.

Description of the drawings

By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, purposes and advantages of the present invention will become more apparent.

Fig. 1 is a cross-sectional view of a bladeless fan in the prior art.

Fig. 2 is a schematic diagram of an internal air duct of a fan according to an embodiment of the present invention.

Fig. 3 is a perspective view of a fan according to an embodiment of the present invention.

Fig. 4 is a cross-sectional view taken along the line A-A in Fig. 3.

Fig. 5 is an exploded view of a fan according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of a combination of an air intake cover and an air intake bracket in a fan according to an embodiment of the present invention.

Fig. 7 is a schematic diagram of the air intake cover and the air intake bracket separated in the fan according to an embodiment of the present invention.

Fig. 8 is a schematic diagram of a first modification of the air intake cover of the fan according to an embodiment of the present invention.

Fig. 9 is a schematic diagram of a second modification of the air intake cover of the fan according to an embodiment of the present invention.

Fig. 10 is a cross-sectional view of a fan motor assembly according to an embodiment of the present invention.

Fig. 11 is a cross-sectional view taken along the line B-B in Fig. 10.

Fig. 12 is a partial exploded view of a fan motor assembly in a fan according to an embodiment of the present invention.

Fig. 13 is a perspective view of a motor cover in a fan according to an embodiment of the present invention.

FIG. 14 is a schematic diagram of the principle of the fan motor assembly in the fan of an embodiment of the present invention for guiding flow to the nozzle.

Fig. 15 is a perspective view of a nozzle in a fan according to an embodiment of the present invention.

Fig. 16 is an exploded schematic view of a nozzle in a fan according to an embodiment of the present invention.

Fig. 17 is a partial cross-sectional view of the first type of nozzle in a fan according to an embodiment of the present invention.

Figure 18 is a partial cross-sectional view of a second type of nozzle in a fan according to an embodiment of the present invention.

Fig. 19 is a schematic diagram of a second type of nozzle in a fan according to an embodiment of the present invention to increase the spray angle.

FIG. 20 is a schematic diagram of the second type of nozzle in the maximum injection angle of the fan according to an embodiment of the present invention.

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms, and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention will be comprehensive and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the figures indicate the same or similar structures, and thus their repeated description will be omitted.

Fig. 2 is a schematic diagram of the internal air duct of the fan of the present invention. As shown in FIG. 2, the fan of the present invention includes a body 10 for generating an air flow and a nozzle 7 for spraying the air flow. Wherein, the body 10 at least includes a top cover 11, a filter 2, an air intake cover 3 for providing an air inlet, a fan motor assembly 5 for generating air flow, and a housing 8 for providing an air outlet. Two sides of the housing 8 are provided with air inlet holes, and the filter 2 is arranged at a corresponding position inside the air inlet hole in the housing 8. The filter 2 is arranged upstream of the air intake cover 3, and the filter 2 surrounds the air intake cover 3. The air intake cover 3 is arranged at the air inlet of the fan motor assembly 5. The fan motor assembly 5 causes the air flow to pass through the body 10 in a first direction W, which is the direction of gravity. The nozzle 7 is connected to the air outlet, and is used to receive the air flow from the body 10 and emit the air flow. The air flow enters the nozzle 7 with the air flow. The air flow is emitted out of the nozzle after moving at least in a second direction X opposite to the first direction W. 7. The second direction X is the anti-gravity direction. The air inlet is provided in the air intake cover 3, and the air intake cover 3 is located at the upper part of the body 10 in the direction of gravity. The air outlet is located at the lower part of the housing 8 of the body 10 in the direction of gravity, and the fan motor assembly 5 is located in the area between the air inlet and the air outlet. The nozzle 7 has at least one output air passage 72, the extension direction of the output air passage 72 is parallel to the first direction W, and the air flow passes through the output air passage 72 in the second direction X. The fan of the present invention adopts a completely different air duct design from the prior art, inverts the suction direction of the fan motor assembly 5, takes high air suction from the upper part of the body 10, and the air flows from top to bottom after passing through the fan motor assembly 5. , The exhaust gas enters the nozzle 7 from the lower part of the body 10, and after the air flow flows from the nozzle 7 from bottom to top, it can be ejected from the air outlets 71 of different heights of the nozzle 7. The present invention overlaps the position layout of the fan motor assembly 5 and the position layout of the nozzle 7 in the first direction, further reduces the overall height, and makes full use of the idle space in the center of the nozzle 7. Moreover, under the premise of the same height, the present invention can realize a larger nozzle 7 and enhance the air blowing capacity.

In a modified example, the nozzle 7 may be a tubular member arranged on one side of the body 10 and extending in a vertical direction. The lower section of the tubular member is rotatably connected to the opening of the body 10, but it is not limited to this.

The nozzle 7 and the fan motor assembly 5 in the present invention can be arranged in parallel along the first direction W (or the second direction X), and the nozzle 7 and the fan motor assembly 5 are at least partially overlapped based on projections of the same vertical plane. This allows the air outlet 71 of the nozzle 7 to be set at the same level as the fan motor assembly 5 or even lower than the level of the fan motor assembly 5. By improving the air duct, the present invention divides the long-distance air flow stroke of the prior art through the fan motor assembly and the nozzle in a single direction into at least two short-distance air flow strokes in opposite directions, and two short-distance air flow strokes. The air flow strokes can be parallel to each other, which breaks through the industry technical barriers that fan motor components and nozzles must be arranged in order in the height direction, so that the overall height of the fan can be greatly reduced, the center of gravity of the product is also lowered, and the standing posture of the product is improved. The stability. In addition, the air inlet located at the upper position will not suck in dust on the ground when inhaling air, which reduces the use load of the filter screen, does not need to replace the filter screen frequently, and greatly reduces the use cost of the leafless fan filter screen.

The air outlet of the fan motor assembly 5 is connected to two guide air passages. The guide air passages are respectively connected to the openings on both sides of the body 10. The nozzle 7 has a half-frame nozzle body 70, and the nozzle body 70 spans the body 10 toward the first The first side surface in the direction W, and both ends of the nozzle body 70 communicate with the openings. The body 10 has at least one guiding air passage for changing the flow direction of the air flow. The guiding air passage extends in a third direction Y perpendicular to the first direction W, and respectively communicates with the air outlet of the fan motor assembly 5 and the nozzle 7. In this embodiment, the fan motor assembly 5, the guide air passage and the nozzle 7 jointly form at least one U-shaped combined air passage, but it is not limited to this. The shape of the nozzle body 70 in this embodiment is an inverted U shape, and the nozzle body 70 can rotate at a certain angle relative to the body 10 based on the axis of the opening of the body 10 as a rotation axis, so as to blow air in different directions. After the rotation, although the air flow flowing along the nozzle body 70 flows obliquely (based on the vertical plane), as the air flow enters the depth of the nozzle body 70, the air flow will still generate in the second direction X (anti-gravity Direction). The nozzle body 70 is provided with at least one air outlet 71 opening along the fourth direction Z, and the fourth direction Z is perpendicular to the plane formed by the first direction W and the third direction Y. The air outlet 71 of the nozzle body 70 is combined to form an inverted U-shaped air duct, and the air inlet of the body 10 is located within the range of the inverted U-shaped air duct.

In a preferred example, the nozzle body 70 has a first state of straddling the first side surface of the body 10 facing the first direction, and after rotating based on the opening, the nozzle body 70 avoids the first projection area of the filter 2 based on the second direction. In the second state, the filter 2 has a lifting stroke that avoids the nozzle body 70 in the second direction to enter and exit the body 10 based on the second state of the nozzle body 70. The projection of the lift stroke of the filter 2 based on the second direction and the projection of the second state of the nozzle body 70 based on the second direction do not overlap, so that the filter 2 can be detached in the second direction X and the body 10 can be removed, but not Limited by this.

In a preferred example, the accommodating space has two replacement channels for the filter 2 to enter and exit the accommodating space (the U-shaped nozzle body 70 naturally has two large openings communicating with the internal accommodating space), and the extension direction of the replacement channel is vertical In the second direction, the filter 2 has a first stroke in and out of the accommodating space from the body 10 in the second direction, and a second stroke in and out of the accommodating space from the replacement channel. The height of the accommodating space and the height J of the replacement channel are both greater than the height K of the filter 2, and the width of the accommodating space and the width of the replacement channel are both greater than the width of the filter 2.

Fig. 3 is a perspective view of the fan of the present invention. Fig. 4 is a cross-sectional view taken along the line A-A in Fig. 3. Fig. 5 is an exploded view of the fan of the present invention. As shown in Figures 3 to 5, in a preferred embodiment of the present invention, the body of the fan of the present invention includes a base 6 arranged from bottom to top along the second direction X, a fan motor assembly 5 for generating air flow, The air intake bracket 14, the air intake cover 3 that provides the air inlet, the filter 2 and the top cover 11. The present invention makes full use of the free central area of the nozzle 7 in the prior art, and sets the body 10 in the central area of the nozzle 7 as a whole. The volume is greatly reduced, which reduces the cost of product transportation and product storage.

Two mutually aligning inner shells 4 are engaged with both sides of the fan motor assembly 5 and the base 6. After the inner shells 4 are screwed together, the fan motor assembly 5 is limited to the top of the base 6, and the two inner shells 4 are formed by mating An annular groove. The inner sides of the two ends of the nozzle body 70 are respectively provided with a first air inlet 74 and a second air inlet 75, and the first air inlet 74 and the second air inlet 75 respectively communicate with an opening on both sides of the body 10.

Two mutually aligned shells 8 are clamped on the outer periphery of the inner shell 4, the shell 8 covers the air intake cover 3 and the fan motor assembly 5, and the area of each shell 8 corresponding to the air intake cover 3 is provided with a mesh Air inlet.

The filter 2 surrounds the air intake cover 3, and the filter 2 is arranged upstream of the air inlet of the air intake cover 3. The filter 2 is a tubular air filter 23. The first side of the tubular air filter 23 is provided with a first annular support frame 22 for fixing the first annular seal 21, and the lower surface of the top cover 11 is provided with a slot. The slot of 11 is detachably engaged with the first annular support frame 22. The medium of the tubular air filter 23 can be an existing air filter material or an air filter material invented in the future, and is not limited thereto.

Fig. 6 is a schematic diagram of the combination of the air intake cover and the air intake bracket in the fan of the present invention. Fig. 7 is a schematic diagram of the air intake cover and the air intake bracket separated in the fan of the present invention. As shown in Figures 6 and 7, the air intake cover 3 in this embodiment is arranged downstream of the air inlet and upstream of the air intake of the fan motor assembly 5. The air intake cover 3 is provided with a muffler hole 31, and the air flow passes through the muffler After the hole 31 is passed through the body 10 in the first direction. The muffler holes 31 are arranged in an array on the surface of the air intake cover 3 to form an array of muffler holes 31, and the array of muffler holes 31 surround the air intake cover 3. The muffler hole 31 is a variable-diameter through hole. The opening area of each muffler hole 31 on the outer wall is larger than the opening area of the inner wall. The opening diameter of the inner wall of the gas hood 3 is 1 mm to 2.5 mm. In a preferred solution, the diameter of the opening of the muffler hole 31 located on the outer wall of the air intake cover 3 is 2.8mm to 3.0mm, and the diameter of the opening located on the inner wall of the air intake cover 3 is 2.5mm, so that each muffler hole 31 has a better The noise reduction and noise reduction function in order to obtain a better mute effect of the whole machine.

In order to obtain an optimal effect between air intake and volume, the flow cross-sectional area of the air inlet of the fan motor assembly 5 is S ₁ , and the sum of the flow cross-sectional areas of all muffler holes 31 is S ₂ , S ₂ ≥ S ₁ . In a preferred solution, the sum of the flow cross-sectional areas of all the muffler holes 31 is S ₂ greater than or equal to 2.5 times the flow cross-sectional area S _{1 of the} air inlet, thereby further ensuring a better mute effect.

Moreover, the top cover 11 and the body 10 are rotatably engaged, the base plate 34 supports the top cover 11, the top cover 11 is provided with a stopper on the side where the tubular air filter is pressed against, and the base plate 34 is provided with a circular stop groove 32 for guiding and restricting The positioning member rotates within the range of the circular limiting groove 32, and with the rotation of the limiting member, the top cover 11 and the body 10 are engaged or separated. The intake bracket 14 supports the second side of the tubular air filter in the second direction. The annular upper end surface of the tubular air filter 23 and the base plate 34 of the air intake cover 3 are both sealed with the top cover 11, and the annular lower end surface of the tubular air filter 23 And the opening 35 of the air intake cover 3 and the air intake bracket 14 are sealed. The air intake cover 3 provides support and rotation guidance for the top cover 11, strengthens the overall strength of the product and the functionality of special filter replacement. The fan of the present invention opens the top cover 11 by rotating and replaces a new tubular air filter. Net 23.

The air intake bracket 14 is provided with a plurality of first buckles 142 surrounding the central opening 141 and a plurality of second buckles 143 arranged outside the first buckles 142. The bayonet of the opening 35 of the air intake cover 3 is buckled with the first buckle 142 of the air intake bracket 14. The lower surfaces of the two side support frames 13 are connected to the second buckle 143 of the air intake bracket 14, and The height is greater than the height of the fan motor assembly 5, and a space for accommodating the filter 2 and the air intake cover 3 is provided between the two upper side support frames 13 of the enclosed housing 8. The lower surface of the air intake bracket 14 is provided with a connecting column, and the air intake cover 3 is connected to the upper surface of the air intake bracket 14 so that the air intake cover 3 can be connected to the air inlet of the fan motor assembly 5 through the air intake bracket 14. 12 is a circular connecting frame.

In order to enhance the air flow velocity and the mute effect, the air intake cover 3 of the following structure can be adopted in the present invention:

Fig. 8 is a schematic diagram of a first modification of the air intake cover in the fan of the present invention. As shown in FIG. 8, the air intake cover 3 is an inverted barrel-shaped member, including an annular side wall 30, an opening 35 located at the lower end of the annular side wall 30, and a base plate 34 located at the upper end of the annular side wall 30. The opening 35 is sealed and communicated with The central opening 141 of the air support 14 and the opening 35 cover the air inlet of the fan motor assembly 5, and an air inlet space is formed between the air inlet and the base plate 34. Each muffler hole 311 on the air intake cover 3 is a variable diameter through hole arranged in a direction radiating outward along the rotating shaft of the motor. The opening on the outer wall of the air intake cover 3 is larger than the opening on the inner wall of the air intake cover 3, In order to get a better mute effect.

Fig. 9 is a schematic diagram of a second modification of the air intake cover in the fan of the present invention. As shown in Fig. 9, the air intake cover 3 is a frustum member, including a frustum-shaped annular side wall 30, an opening 35 located at the lower end of the annular side wall 30, and a base plate 34 located at the upper end of the annular side wall 30. The opening 35 covers the air inlet of the fan motor assembly 5, and an air inlet space is formed between the air inlet and the base plate 34. Each muffler hole 312 on the air intake cover 3 is not only a diameter-reducing through hole, the opening on the outer wall of the air intake cover 3 is larger than the opening on the inner wall of the air intake cover 3, and the guide direction of each muffler hole 312 points toward the fan The air inlet of the motor assembly 5 limits the flow of air through the muffler hole 31 to the air inlet of the fan motor assembly 5, so as to obtain a better balance between the air flow rate and the mute effect, and improve the overall performance and humanization of the whole machine Experience.

Figure 10 is a cross-sectional view of the fan motor assembly of the present invention. Fig. 11 is a cross-sectional view taken along the line B-B in Fig. 10. Fig. 12 is a partial exploded view of the fan motor assembly in the fan of the present invention. Fig. 13 is a perspective view of the motor cover in the fan of the present invention. Fig. 14 is a schematic diagram of the principle of the fan motor assembly in the fan of the present invention that guides flow to the nozzle. As shown in Figures 10 to 14, the fan motor assembly 5 in the fan of the present invention includes: an air guide mask 51, an air guide 52, an impeller 53, a motor bracket 54, a motor 56, and a motor cover combined in sequence along a first direction W 58 and the air outlet three-way seat 50 mainly combine the above-mentioned components by positioning the damping pad 55. The air guide mask 51 seals and communicates with the scroll channel 34 of the air intake cover 3 and the air guide 52. The motor bracket 54 and the motor cover 58 jointly form a casing for accommodating the motor 56. The casing is provided with a first guide vane 581 and a second guide vane 582 that respectively guide two air outlets. Part of the air flow generated by the impeller After being guided by the first guide vane 581, it is transported to the nearest first air outlet 504 along the first path 5a, and the remaining part of the air flow generated by the impeller is guided by the second guide vane 582 and then transported to the nearest path along the second path 5b. Two air outlet 505.

Each guide vane is inclined to the nearest air outlet, and the angle between the inclined surface of the guide vane and the vertical surface ranges from 10° to 45°. In a preferred example, according to the circumference of the motor cover 58, there are guide vanes that are equally inclined in mirror images, and the guide vanes are distributed equally in the four quadrants in mirror images. The angle range between the inclined surface of the guide vane and the vertical surface is 20°, so that the wind of the impeller can be guided to the air outlets on both sides, so that the wind is uniform and the noise is reduced.

In this embodiment, the first path 5a and the second path 5b are separated by different guide vanes and the housing. At least part of the first path 5a is formed by the motor bracket 54, the outer surface of the motor cover 58 and the second path of the motor cover 58. A guide vane 581 is jointly defined. At least part of the second path 5b is jointly defined by the motor bracket 54, the outer surface of the housing of the motor cover 58 and the second guide vane 582 of the motor cover 58.

The fan motor assembly 5 also includes an air outlet three-way seat 50 located downstream of the casing. The air outlet three-way seat 50 includes an air inlet for receiving air flow, and a first air outlet 504 and a second air outlet 505 respectively communicating with the nozzle 7. And the split wall 502 which splits the air flow to the first air outlet 504 and the second air outlet 505 respectively, and the two ends of the nozzle 7 are respectively connected to the first air outlet 504 and the second air outlet 505. The air passing through the first guide vane 581 along the first path 5a is guided to the first air outlet 504 through one side of the flow dividing wall 502, and the air passing through the second guide vane 582 along the second path 5b flows through the dividing wall. The other side of the body 502 is guided to the second air outlet 505. The fan motor assembly 5 also includes an air inlet. The dividing wall 502 is set based on the central axis of the inlet, and the flow area of the inlet is equally divided. The two sides of the dividing wall 502 respectively form a symmetrical first guide slope and a second guide slope, The first guide slope guides part of the air flow passing through the air inlet to the first air outlet 504, and the second guide slope guides part of the air flow passing through the air inlet to the second air outlet 505, so as to reduce noise while reducing noise. Divide the air flow passing through the air inlet. The inner wall of the air outlet three-way seat 50 is provided with a sunken diversion step 503 extending from the first guide slope to the first air outlet 504. The closer to the first air outlet 504, the sinking distance of the sunken diversion step 503 The larger; the inner wall of the air outlet three-way seat 50 is provided with a sunken diversion step 503 extending from the second guide slope to the second air outlet 505, the closer to the second air outlet 505, the sunken diversion step 503 The greater the sinking distance is to reduce the noise caused by the turning of the air flow and provide space for the base 6, but it is not limited to this.

The heat generated by the motor is discharged along the S direction, diverted through the diverging wall 502 of the air outlet three-way seat 50, and then along the sunken diversion steps to reach the first air outlet 504 and the second air outlet 505, respectively. The air flow generated by the impeller 53 passes through the motor bracket 54, the outer surface of the outer surface of the motor cover 58 and the first guide vane 581, After the second guide vane 582 reaches the first air outlet 504 and the second air outlet 505 respectively, the second part of the air flow does not need to be diverted by the alignment of the dividing wall 502. In this embodiment, the S direction is close to the R direction, so that the movement of the air flow along the R direction helps to more efficiently remove the heat generated by the motor 56 between the motor bracket 54 and the motor cover 58 and helps to cool the motor. The present invention effectively reduces noise by dividing the air flow and then turns it separately, and can accelerate the speed of the air flow flowing through the air outlet three-way seat 50 to the nozzle 7. The air outlet three-way seat 50 in the present invention integrates the flow diversion and flow division, which greatly reduces the height of the fan motor assembly 5, so that the overall height and volume of the fan machine are further reduced. An air outlet 583 is provided on the surface of the motor cover 58.

Fig. 15 is a perspective view of the nozzle in the fan of the present invention. Fig. 16 is an exploded schematic view of the nozzle in the fan of the present invention. Figure 17 is a partial cross-sectional view of the first type of nozzle in the fan of the present invention. As shown in Figures 15 to 20, the nozzle 7 of the present invention includes an output air passage 72, a first air inlet 74, a second air inlet 75, an air outlet 71, and at least one positive wind retaining wall 73. The shape of the nozzle 7 is an inverted U shape. , The two air inlets of the nozzle 7 are connected to the two sides of the body 10 respectively. The air inlet receives the air flow from the body 10, transmits it to the air outlet 71 through the output air passage 72, and then emits the air flow. Wind angle. As the air flow enters the nozzle 7, the air flow is emitted out of the nozzle 7 after moving at least in a second direction opposite to the first direction. The positive wind retaining wall 73 is arranged on the inner wall of the output air duct 72 and on the same side as the air outlet 71. The positive wind retaining wall 73 is located upstream of the air outlet 71. The plane of the positive wind retaining wall 73 is perpendicular to the guiding direction of the output air duct 72. The wall 73 can correct the air outlet angle and reduce the angle a between the direction of the air jet ejected from the air outlet 71 and the axis of the air outlet 71 to 15°. (If the positive wind retaining wall 73 is not installed, the angle between the direction of the air jet from the air outlet 71 and the axis of the air outlet 71 may exceed 45°. At this time, the fan can only be used as a low-position vertical fan, and cannot be used as a stand. Fan use).

In a preferred embodiment, a plurality of positive wind retaining walls 73 are successively provided in the outlet air passage 72 along the guiding direction of the outlet air passage 72. Along the guiding direction of the output air passage 72, the height of the positive wind retaining wall 73 increases successively.

In a preferred embodiment, the air outlet 71 is provided with a retracted shoulder 77, and the retracted depth of the retracted shoulder 77 is less than the height of the positive wind barrier wall 73, and the retracted depth of the retracted shoulder 77 is 5mm to 12mm. The height of the windshield wall 73 is 15 mm to 25 mm. In this embodiment, the retracted depth of the retracted shoulder 77 is 7 mm, and the height of the positive wind retaining wall 73 is 18.5 mm, so as to further reduce the gap between the direction of the air jet ejected from the air outlet 71 and the axis of the air outlet 71. Angle a.

Figure 18 is a partial cross-sectional view of the second type of nozzle in the fan of the present invention. Fig. 19 is a schematic diagram of the second type of nozzle in the fan of the present invention to increase the spray angle. Fig. 20 is a schematic diagram of the second type of nozzle in the fan of the present invention at the maximum injection angle. As shown in FIGS. 18 to 20, the nozzle 7 of the present invention further includes a rotating member 76 for adjusting the angle between the positive wind retaining wall 73 and the guiding direction of the output air passage 72. The rotating member 76 is disposed on the inner wall of the output air passage 72 and on the same side as the air outlet 71, and the rotating member 76 is connected to the positive wind retaining wall 73. As the positive wind retaining wall 73 blocks more air flow, the angle a between the direction of the air jet ejected from the air outlet 71 and the axis of the air outlet 71 decreases (for example, decreases to 15°). Comparing FIGS. 19 to 20, as the positive wind barrier 73 blocks less air flow, the angle a between the direction of the air jet ejected from the air outlet 71 and the axis of the air outlet 71 increases (for example, increases to 45°). In the present invention, the positive wind retaining wall 73 is rotated in the output air passage 72 by the rotating member 76 to adjust the air flow of the positive wind retaining wall 73 to the output air passage 72 on the side close to the air outlet 71, so as to adjust the air outlet angle to be comfortable for the human body. Due to the angle, the fan of the present invention can be applied to two different use scenarios of table fan and vertical fan at the same time.

In summary, the purpose of the present invention is to provide a fan, which can change the direction of movement of the air flow in the fan, reduce the overall volume, and reduce the use cost.

The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be considered that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

A fan is characterized in that it comprises:

The body includes an air inlet, an air outlet, and a fan motor assembly for generating an air flow that passes through the body in a first direction; and

The nozzle includes an output air channel, an air inlet, an air outlet, and at least one positive wind retaining wall. The air inlet receives air flow from the body, transmits the air flow through the output air channel to the air outlet, and emits the air flow, The positive wind retaining wall blocks part of the air flow to the air outlet, and adjusts the air outlet angle of the air flow sprayed out of the air outlet;

Following the air flow into the nozzle, the air flow is emitted out of the nozzle after moving at least in a second direction opposite to the first direction.
The fan according to claim 1, wherein the positive wind retaining wall is arranged on the inner wall of the output air duct and on the same side of the air outlet, and the positive wind retaining wall is located upstream of the air outlet.
The fan according to claim 2, wherein the plane of the positive wind retaining wall is perpendicular to the guiding direction of the output air passage.
The fan according to claim 1, wherein the nozzle further comprises a rotating member for adjusting the angle between the positive wind retaining wall and the guiding direction of the output air passage.
The fan according to claim 4, wherein the rotating member is disposed on the inner wall of the output air passage and on the same side as the air outlet, and the rotating member is connected to the positive wind barrier.
The fan according to claim 5, wherein as the positive wind barrier wall blocks more of the air flow, the air flow is ejected from the air outlet between the direction of the air outlet and the axis of the air outlet. The angle decreases.
The fan according to claim 5, characterized in that, as the positive wind retaining wall blocks less of the air flow, the air flow is ejected from the air outlet between the direction of the air outlet and the axis of the air outlet. The angle increases.
The fan according to any one of claims 1 to 7, wherein a plurality of positive wind retaining walls are sequentially arranged in the output air passage along the guiding direction of the output air passage.
8. The fan according to claim 8, wherein the height of the positive wind retaining wall increases in sequence along the guiding direction of the output air passage.
The fan according to claim 7, wherein the air outlet is provided with a retractable shoulder, and the retracted depth of the retracted shoulder is smaller than the height of the positive wind barrier.