CN110792639B

CN110792639B - Fan and method for replacing filter by fan

Info

Publication number: CN110792639B
Application number: CN201911130112.8A
Authority: CN
Inventors: 应辉
Original assignee: Individual
Current assignee: Zhejiang Crossbow Brand Electric Appliance Co ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2023-08-25
Anticipated expiration: 2039-11-18
Also published as: CN110792639A

Abstract

The invention provides a fan and a method for replacing a filter by the fan, comprising the following steps: a body including an air inlet, an air outlet, a removable filter and a fan motor assembly for generating an air flow; and a nozzle connected to the air outlet for receiving the air flow from the body and emitting the air flow into the nozzle with the air flow; the air outlet of the fan motor assembly is connected with two guide air passages, the guide air passages are respectively communicated with openings on two sides of the body, an accommodating space is formed by surrounding between the first side face of the body and the first side face of the nozzle body, the accommodating space is provided with at least one replacement channel for the filter to enter and exit the accommodating space, the extending direction of the replacement channel is perpendicular to the second direction, and the filter is provided with a first stroke for the self-body to enter and exit the accommodating space along the second direction and a second stroke for the self-replacement channel to enter and exit the accommodating space.

Description

Fan and method for replacing filter by fan

Technical Field

The present invention relates to the field of air conditioning equipment, and in particular to a fan and a method for replacing a filter by the fan.

Background

With the continuous improvement of living and technological level, the requirements of people on living quality are increasingly improved, and indoor air quality becomes an important concern of people. Especially in recent years, haze and PM2.5 problems occur, and the demand of people for air purifiers is increasing.

The air purifier is a small household appliance for purifying indoor air, and mainly solves the problem of indoor air pollution caused by decoration or other reasons. Because of the durability and uncertainty of the release of contaminants from indoor air, the use of air cleaners to clean indoor air is an internationally recognized method of improving indoor air quality. There are a number of different technologies and mediums in an air purifier that enable it to provide clean and safe air to a user. Common air purification techniques are: low temperature asymmetric plasma air purification technology, adsorption technology, anion technology, negative oxygen ion technology, molecular complexing technology, nano TiO2 technology, HEPA high-efficiency filtration technology, electrostatic dust collection technology, active oxygen technology and the like; the material technology mainly comprises the following steps: photocatalyst, activated carbon, synthetic fiber, HEPA high efficiency material, etc., the cost of the high quality filter screen can be 20% to 30% of the total cost of the air purifier.

Currently, there are more bladeless fans with air screens. Fig. 1 is a cross-sectional view of a bladeless fan according to the prior art. As shown in fig. 1, most of them have an annular nozzle 901, a housing 903, a base 904, a screen 905, a fan motor 906, and a mesh liner 907. Wherein, shell 903 with air inlet mesh sets up on base 904, is equipped with filter screen 905 in the shell 903, is equipped with mesh inner bag 907 in the filter screen 905, is equipped with the first air inlet of fan motor 906 in the mesh inner bag 907, and annular nozzle 901 all sets up in the top of the gravity direction of fan motor 906, and the air outlet of fan motor 906 communicates nozzle 901. Indoor air sequentially passes through meshes of the outer shell 903 and the filter screen 905, then enters the mesh inner container 907, is sucked into an air inlet of the fan motor 906 along the antigravity direction, then is continuously conveyed to one end of the annular nozzle 901 along the antigravity direction (vertically upwards), and is sprayed out after being scattered to all parts of the annular nozzle 901.

In this structure, at least the following technical problems are to be solved:

(1) The annular nozzle with the largest total volume of the bladeless fan and the fan motor are arranged at different height positions in the gravity direction, so that the overall height of the bladeless fan is difficult to reduce, and the use scene of the bladeless fan is greatly limited.

(2) The middle of the annular nozzle is hollow, and this area is underutilized, resulting in waste of the overall volume of the fan, and increased costs for product transportation and product storage.

(3) Because the air inlet position of the fan motor is lower, dust on the ground can be sucked more easily when the air is sucked, the use load of the filter screen is increased, the filter screen is required to be replaced more frequently, and the use cost of the bladeless fan is obviously increased.

(4) The shell of the bladeless fan is of a structure that two shells are horizontally combined, and a filter screen is arranged in each shell. The filter screen seals between three-dimensional joint strip and mesh inner bag through setting up in the low reaches, and three-dimensional joint strip's cost is high, and sealed effect is poor after long-time use moreover.

(5) When the filter screen is replaced, the two shells are required to be detached respectively, the filter screen is replaced respectively, then the two shells are installed again, the process is complex, and the humanized experience is poor.

(6) The product is difficult to add other functional modules and has poor expansibility.

Accordingly, the present invention provides a fan.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a fan and a method for replacing a filter by the fan, which overcome the defects of the prior art, can change the movement direction of air flow in the fan, reduce the overall height of the fan, reduce the overall volume, prolong the service life of a filter screen and reduce the use cost.

Embodiments of the present invention provide a fan, comprising

A body including an air inlet, an air outlet, a removable filter and a fan motor assembly for generating an air flow through the body in a first direction; and

a nozzle connected to the air outlet for receiving the air flow from the body and emitting the air flow, the air flow entering the nozzle with the air flow, the air flow being emitted out of the nozzle after moving at least based on a second direction opposite to the first direction;

the air outlet of the fan motor assembly is connected with two guide air passages, the guide air passages are respectively communicated with openings on two sides of the body, the nozzle is provided with a half-frame-type nozzle body, the nozzle body is bridged on the first side face of the body, which faces the first direction, two ends of the nozzle body are respectively communicated with the openings, a containing space is formed by surrounding the first side face and the first side face of the nozzle body, the containing space is provided with at least one replacement channel for the filter to enter and exit the containing space, the extending direction of the replacement channel is perpendicular to the second direction, and the filter is provided with a first stroke for the body to enter and exit the containing space along the second direction, and a second stroke for the replacement channel to enter and exit the containing space.

Preferably, the height of the accommodating space and the height of the replacing channel are both larger than the height of the filter, and the width of the accommodating space and the width of the replacing channel are both larger than the width of the filter.

Preferably, the filter is a tubular air filter screen, the axial direction of the tubular air filter screen is arranged along the first direction, and the fan further comprises a top cover which is pressed against the first side of the tubular air filter screen along the first direction and an air inlet bracket which supports the second side of the tubular air filter screen along the second direction.

Preferably, the first direction is a gravity direction, the second direction is an antigravity direction, the air inlet is located at an upper portion of the body in the gravity direction, the air outlet is located at a lower portion of the body in the gravity direction, and the fan motor assembly is located in a region between the air inlet and the air outlet.

Preferably, the nozzle has at least one output air passage, the extending direction of the output air passage is parallel to the first direction, the air flow passes through the output air passage along the second direction, the body has at least one guiding air passage for changing the flow direction of the air flow, and the guiding air passage extends along a third direction perpendicular to the first direction and is respectively communicated with the air outlet of the fan motor assembly and the nozzle.

Preferably, the nozzle body is provided with at least one air outlet opening along a fourth direction, the fourth direction is perpendicular to a plane formed by the first direction and the third direction, and the replacement channel is parallel to the fourth direction.

Preferably, the accommodating space has two replacement passages provided in the fourth direction.

The embodiment of the invention also provides a method for replacing the filter by the fan, which adopts the fan and comprises the following steps:

separating the filter to be replaced in the body;

the filter to be replaced enters the accommodating space from the body along a second direction;

removing the filter to be replaced from the accommodating space along the replacing channel;

moving unused filters into the receiving space along the replacement path;

pressing the unused filter from the accommodating space into the body in a first direction;

the unused filters are combined in the body.

Preferably, the filter is a tubular air screen, and the fan further comprises a top cover crimped to a first side of the tubular air screen in the first direction and an air intake bracket supporting a second side of the tubular air screen in the second direction;

Separating the filter to be replaced comprises: separating the top cover from the body to expose the filter to be replaced, and extracting the filter from the air inlet bracket along a second direction;

the combination of the unused filters includes: and self-pressing the filter to the air inlet bracket of the body along a first direction, combining the top cover with the body, and closing the unused filter.

Preferably, the nozzle has at least one output air passage, the extending direction of the output air passage is parallel to the first direction, the air flow passes through the output air passage along the second direction, the body has at least one guiding air passage for changing the flow direction of the air flow, the guiding air passage extends along a third direction perpendicular to the first direction and is respectively communicated with the air outlet of the fan motor assembly and the nozzle, the nozzle body is provided with at least one air outlet hole opening along a fourth direction, the fourth direction is perpendicular to a plane formed by the first direction and the third direction together, and the replacing passage is parallel to the fourth direction.

The fan and the method for replacing the filter by the fan can change the movement direction of air flow in the fan, reduce the whole volume and reduce the use cost.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings.

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

Fig. 2 is a schematic view of an internal duct of the fan of the present invention.

Fig. 3 is a cross-sectional view taken along the direction A-A in fig. 2.

Fig. 4 is a schematic diagram of a fan connection function module according to the present invention.

Fig. 5 is a perspective view of a fan according to the present invention.

Fig. 6 is a sectional view taken along the direction B-B in fig. 5.

Fig. 7 is a cross-sectional view taken along the direction C-C in fig. 5.

Fig. 8 is an exploded view of the fan of the present invention.

Fig. 9 is a partially exploded view of one embodiment of a fan of the present invention.

Fig. 10 is a perspective view of an air inlet of the fan of the present invention.

FIG. 11 is a schematic view of an air inlet of the fan of the present invention.

Fig. 12 is a sectional view taken along the direction D-D in fig. 11.

Fig. 13 is a perspective view of a fan motor assembly in the fan of the present invention.

Fig. 14 is a sectional view taken along the direction E-E in fig. 13.

Fig. 15 is an exploded view of a fan motor assembly in a fan of the present invention.

Fig. 16 is a perspective view of an air outlet three-way seat in a fan motor assembly of a fan according to the present invention.

Fig. 17 to 20 are schematic views illustrating an installation process of the fan of the present invention.

Fig. 21 to 23 are schematic views showing a first filter flow state of the fan according to the present invention. And

fig. 24 to 27 are schematic views showing a second filter flow state of the fan according to the present invention.

Reference numerals

10. Body 51 air guide cover

11. Top cover 52 wind scooper

111. Third positioning seat of positioning buckle 521

112. Second screw-connection lug of first connecting terminal 522

12. Annular connecting frame 523 connecting groove

121. Impeller with positioning clamping groove 53

122. Screw 54 motor support

13. Second positioning seat of side support 541

14. Air inlet support 55 positioning vibration damping pad

141. Connection post 56 motor

2. Filter 57 motor silencing cotton

21. First annular seal 58 motor housing

22. First annular supporting frame 59 sealing ring

23. Tubular air filter 6 base

24. Second annular support 61 power supply box upper cover

25. Second annular seal 62 power strip

3. Intake cover 63 rotary synchronous motor

31. Air inlet 64 rotary support

32. Wave spoiler 65 base

33. Air inlet channel 66 base cover

34. Swirl channel 7 nozzle

35. Concave arc notch 70 nozzle body

4. Inner shell 71 air outlet

41. First air inlet of semicircular limiting groove 72

42. Screw hole 73 second air inlet

43. First buckle 74 annular shoulder

5. Fan motor assembly 75 accommodation space

50. Air-out three-way seat 8 outer shell

501. First side of first positioning seat 8A

502. Second side of the diversion wall 8B

503. Sinking type flow guiding step 81 air inlet hole

504. Semicircular splicing part of first air outlet 82

505. Second air outlet 83 screw hole

506. Second buckle of guide vane 84

507. Function expanding piece of air inlet 9

508. Second contact terminal of first screw tab 91

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted.

Fig. 2 is a schematic view of an internal duct of the fan of the present invention. Fig. 3 is a cross-sectional view taken along the direction A-A in fig. 2. As shown in fig. 2 and 3, the fan of the present invention includes a body 10 for generating an air flow and a nozzle 7 for spraying the air flow. The body 10 includes, among other things, at least a top cover 11, a filter 2, an air inlet cowl 3 providing an air inlet, a fan motor assembly 5 for generating an air flow, a housing 8 providing an air outlet, and a nozzle 7. The first side 8A (see fig. 17) of the housing 8 is provided with an air inlet aperture 81, and the filter 2 is arranged in the housing 8 at a corresponding position inside the air inlet aperture 81. The filter 2 is arranged upstream of the inlet cowl 3, the filter 2 surrounding the inlet cowl 3. The air inlet cover 3 is arranged at the air inlet of the fan motor assembly 5. The fan motor assembly 5 causes an air flow through the body 10 in a first direction W, which is the direction of gravity. The nozzle 7 is connected to an air outlet for receiving the air flow from the body 10 and emitting the air flow, which enters the nozzle 7 with the air flow, which is emitted out of the nozzle 7 after being moved at least based on a second direction X, which is opposite to the first direction W, the second direction X being the antigravity direction. The air inlet is provided in the intake shroud 3, and the intake shroud 3 is located at the upper portion of the body 10 in the gravitational direction. The air outlet is located at a lower part of the second side 8B (see fig. 17) of the housing 8 of the body 10 in the direction of gravity, and the fan motor assembly 5 is located in a region between the air inlet and the air outlet. The nozzle 7 has at least one outlet channel, the direction of extension of which is parallel to the first direction W, through which the air flow passes along the second direction X. The fan of the invention is designed by an air duct completely different from the prior art, the air suction direction of the fan motor assembly 5 is inverted, high air suction is carried out from the upper part of the body part 10, air flow passes through the fan motor assembly 5 from top to bottom, then exhaust air enters the nozzle 7 from the lower part of the body part 10, and the air flow flows from bottom to top through the nozzle 7 and can be sprayed out from the air outlets 71 with different heights of the nozzle 7. The 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 fully utilizes the idle space in the center of the nozzle 7. Moreover, on the premise of equal height, the invention can realize a larger nozzle 7 and strengthen the air delivery capacity.

In a modification, the nozzle 7 may be a vertically extending tubular member provided on one side of the body 10, with a lower section of the tubular member rotatably connected to the opening of the body 10.

The nozzles 7 and the fan motor assemblies 5 in the present invention may be arranged in parallel in the first direction W (or the second direction X), and the respective projections of the nozzles 7 and the fan motor assemblies 5 based on the same vertical plane at least partially overlap. This allows the air outlet 71 of the nozzle 7 to be positioned at a level with the fan motor assembly 5, even below the level of the fan motor assembly 5. The air outlet of the fan motor assembly 5 is connected with two guide air passages, the guide air passages are respectively communicated with openings at two sides of the body 10, the nozzle 7 is provided with a half-frame-type nozzle body 70, the nozzle body 70 is bridged on a first side surface of the body 10, which faces the first direction W, and two ends of the nozzle body 70 are respectively communicated with the openings. The body 10 has at least one guiding air passage for changing the direction of the air flow, which extends along a third direction Y perpendicular to the first direction W, and is respectively communicated with the air outlet of the fan motor assembly 5 and the nozzle 7. In the present embodiment, the fan motor assembly 5, the guide air passage and the nozzle 7 together form at least one U-shaped combined air passage, but not limited thereto.

The nozzle body 70 has an inverted U-shape, and the nozzle body 70 may be rotated at an angle with respect to the body 10 based on an 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 is inclined (based on a vertical plane), the air flow is displaced in the second direction X (antigravity direction) as the air enters deep in the nozzle body 70. The nozzle body 70 is provided with at least one air outlet 71 opening along a fourth direction Z, which is perpendicular to a plane formed by the first direction W and the third direction Y. The air outlet holes 71 of the nozzle body 70 are combined to form an inverted U-shaped air duct, and the air inlet of the body 10 is located in the range of the inverted U-shaped air duct.

In a preferred embodiment, the nozzle body 70 has a first state of bridging the first side of the body 10 facing the first direction, and a second state of avoiding the filter 2 based on the projection area of the second direction by the nozzle body 70 after the opening is rotated, and the filter 2 has a lifting stroke of avoiding the nozzle body 70 in the second direction to come in and go out of the body 10 based on the second state of the nozzle body 70. The projection of the lifting stroke of the filter 2 based on the second direction does not overlap with the projection of the second state of the nozzle body 70 based on the second direction, so that the body 10 can be removed after the filter 2 is disassembled in the second direction X.

In a preferred embodiment, the accommodating space 75 has two exchanging channels (the U-shaped nozzle body 70 naturally has two oversized openings communicating with the inner accommodating space 75) for the filter 2 to enter and exit the accommodating space 75, the extending direction of the exchanging channels is perpendicular to the second direction, the filter 2 has a first stroke for the body 10 to enter and exit the accommodating space 75 in the second direction, and a second stroke for the exchanging channels to enter and exit the accommodating space 75. The height of the accommodating space 75 and the height J of the replacing channel are larger than the height K of the filter 2, and the width of the accommodating space 75 and the width of the replacing channel are larger than the width of the filter 2.

Fig. 4 is a schematic diagram of a fan connection function module according to the present invention. As shown in fig. 4, in the present invention, not only the entire body 10 can be provided in the central region of the nozzle body 70, but also different structural layouts of this region can be more fully developed, the expansion function of the fan can be enhanced, and the module having the function expansion and the body 10 can be provided together in the central region of the nozzle body 70. The first side of the fan facing the first direction W and the first side of the nozzle body 70 of the present invention form a receiving space 75, and the receiving space 75 is provided with a first connection terminal 112. The fan of the present invention further includes at least one function expansion member 9 disposed in the accommodating space 75, and the second contact terminal 91 of the function expansion member 9 is electrically connected to the first connection terminal 112. For example, a first side of the body 10 is provided with a first connection terminal 112, and the first side of the body 10 supports the lower surface of the function expanding member 9. The second contact terminal 91 is disposed on the lower surface of the function expanding member 9, and the second contact terminal 91 is in butt conduction with the first connection terminal 112 along the second direction X. In a preferred embodiment, the second contact terminal 91 is connected to the power supply circuit board of the fan base by a wire, but not limited thereto.

In the present embodiment, the function extender 9 is one of the following: an electronic humidifier; the electronic incense comprises an electronic incense machine, an LED lamp, an electronic mosquito dispeller, an electronic display screen and a charging seat for charging a mobile terminal, but the electronic incense machine is not limited to the electronic incense machine. The function expanding member 9 may be an ejector member, and an exhaust port of the ejector member is exposed to the accommodating space 75, and the air flow ejected from the nozzle 7 passes through the exhaust port of the ejector member, but is not limited thereto. In a preferred embodiment, the air outlets along the distribution of the nozzles are provided with coanda surfaces, and an air passage is formed through the coanda surfaces from the first side of the nozzle body 70 through the receiving space 75 in the nozzle body 70 to the second side of the nozzle body 70, the air passage driving a portion of the air on one side of the nozzle body 70 to move to the air outlet side of the nozzle body 70, the air outlet of the ejector member is disposed within the air passage formed by the air outlets, and the portion of the air passing through the nozzle body 70 flows through the air outlet of the ejector member to mix the functional air discharged from the ejector member into the air flow ejected by the fan. For example: the function expanding member 9 is an electronic humidifier, and the air flow ejected from the nozzle 7 passes through an air outlet of the electronic humidifier. The inner circumference of the nozzle 7 is provided with an air outlet opening towards the same side, the air outlet is provided with a coanda surface, part of air on one side of the nozzle body 70 is driven to move towards one side of the nozzle body 70, and part of air passing through the nozzle body 70 flows through an air outlet of the electronic humidifier, so that the air flow sprayed by the fan is more moist as a whole, the functional combination of the electronic humidifier and the fan is realized, and the humidifying effect of the fan is enhanced. Similarly, the function expanding member 9 may be an electronic aromatherapy machine, and the air flow ejected from the nozzle 7 passes through an air outlet of the electronic aromatherapy machine. The air outlet with the coanda surface can be used, so that the electronic aromatherapy machine and the fan are combined functionally, the effect of the fan for improving the room smell is enhanced, and the description is omitted here. The shape of the nozzle body 70 in the invention not only can provide a channel for replacing the filter screen without moving the nozzle body 70; but also to facilitate the mixing of more functional air of the injection member into the air flow emitted by the fan by means of a continuous coanda surface consisting of circumferentially arranged outlets, achieving a functional combination.

Fig. 5 is a perspective view of a fan according to the present invention. Fig. 6 is a sectional view taken along the direction B-B in fig. 5. Fig. 7 is a cross-sectional view taken along the direction C-C in fig. 5. Fig. 8 is an exploded view of the fan of the present invention. As shown in fig. 5 to 8, in a preferred embodiment of the present invention, the body of the fan of the present invention includes a base 6 disposed from bottom to top in a second direction X, a fan motor assembly 5 for generating an air flow, an air intake bracket 14, an air intake hood 3 providing an air inlet, a filter 2, and a top cover 11. The base 6 includes, among other things, a power box upper cover 61, a power board 62, a rotary synchronous motor 63, a rotary bracket 64, a base 65, and a base cover 66, and upper components supported by the power box upper cover 61 are enabled to horizontally rotate in place by rotation of the rotary synchronous motor 63, a fan motor component 5, an intake hood 3 nozzle 7, and the like. According to the invention, the central area of the idle nozzle 7 in the prior art is fully utilized, the body 10 is integrally arranged in the central area of the nozzle 7, and the air inlet of the body 10 is positioned in the range of the inverted U-shaped air duct, so that the volume of a product is greatly reduced, and the cost of product transportation and product storage is reduced.

The fan motor assembly 5 and the two sides of the base 6 are clamped by the two inner shells 4 which can be mutually matched, the fan motor assembly 5 is limited above the base 6 after the inner shells 4 are matched and screwed, the side wall of each of the two ends of each inner shell 4 is provided with a first buckle 43, a screw hole 42 and a semicircular limiting groove 41 exposing an opening, and an annular groove is formed after the two inner shells 4 are matched. The inner sides of the two ends of the nozzle body 70 are respectively provided with a first air inlet 72 and a second air inlet 73, and the first air inlet 72 and the second air inlet 73 are respectively communicated with an opening.

Two mutually involutable outer shells 8 are clamped on the periphery of the inner shell 4, the outer shells 8 cover the air inlet cover 3 and the fan motor assembly 5, and a meshed air inlet hole 81 is formed in the area, corresponding to the air inlet cover 3, of each outer shell 8. The side walls of both ends of the housing 8 are provided with a second buckle 84, a semicircular split portion 82, and a screw hole 83. The second catches 84 of the outer shell 8 respectively engage the first catches 43 of the inner shell 4.

The lower surfaces of the two side support frames 13 are connected to the air inlet bracket 14, and the upper surfaces of the side support frames 13 and the screw holes 83 at the upper end of the butted shell 8 are connected together through the screw holes 122 of the annular connecting frame 12. The inner side of the annular connecting frame 12 is provided with a positioning clamping groove 121. The height of the shell 8 is larger than that of the fan motor assembly 5, and a space for accommodating the filter 2 and the air inlet hood 3 is provided between two side supporting frames 13 on the upper part of the surrounded shell 8. The lower surface of the air inlet bracket 14 is provided with a connecting column 141, the periphery of the fan motor assembly 5 is provided with a connecting groove 523, the connecting column 141 is inserted into the connecting groove 523, and the air inlet cover 3 is connected to the upper surface of the air inlet bracket 14, so that the air inlet cover 3 can be connected to the air inlet of the fan motor assembly 5 through the air inlet bracket 14.

The filter 2 surrounds the inlet cowl 3, the filter 2 being arranged upstream of the air inlet of the inlet cowl 3. The filter 2 is a tubular air filter screen 23 (see fig. 20), a first side of the tubular air filter screen 23 is provided with a first annular supporting frame 22 (see fig. 20) for fixing the first annular sealing member 21 (see fig. 20), a slot is arranged on the lower surface of the top cover 11, and the slot 56 of the top cover 11 is detachably clamped with the first annular supporting frame 22.

The lower surface of the top cover 11 is provided with a positioning buckle 111 which is detachably engaged with a positioning clamping groove 121 of the annular connecting frame 12 in a rotating manner. When the top cover 11 is engaged in the annular connecting frame 12, the top cover 11 and the air intake bracket 14 clamp the upper end face and the lower end face of the filter 2. A second side of the tubular air screen 23 is provided with a second annular support frame 24 (see fig. 20) to which a second annular seal 25 (see fig. 20) is secured. The second annular support bracket 24 is connected to the air intake bracket 14. A first side of the tubular air screen 23 is sealed to the top cover 11 by a first annular seal 21 and a second side of the tubular air screen 53 is sealed to the air intake bracket 14 by a second annular seal 25. The material of the first annular seal 21 and the second annular seal 25 is preferably a slow rebound sponge. The medium of the tubular air filter 23 may be, but not limited to, an existing air filter material or an air filter material of future inventions.

Fig. 9 is a partially exploded view of one embodiment of a fan of the present invention. Fig. 10 is a perspective view of an air inlet of the fan of the present invention. FIG. 11 is a schematic view of an air inlet of the fan of the present invention. Fig. 12 is a sectional view taken along the direction D-D in fig. 11. As shown in fig. 9 to 12, the body 10 of the fan of the present invention is provided with an intake shroud 3 having an air inlet. An air intake shroud 3 is disposed downstream of the filter 2, the air intake shroud 3 being disposed in an annular region defined by the filter 2, the air flow filtered by the filter 2 being directed through the air intake shroud 3 into the fan motor assembly 5. For the fan motor assembly 5, the air intake shroud 3 is disposed upstream of the air inlet of the fan motor assembly 5, and the air intake shroud 3 is capable of turbulence muffling the air flow entering the fan motor assembly 5. The periphery of the air inlet cover 3 along the first direction W is provided with a plurality of circumferentially distributed and spaced-arranged wave-shaped spoilers 32, the wave-shaped spoilers 32 extend from the periphery center of the air inlet cover 3, gaps between adjacent wave-shaped spoilers 32 form vortex-arranged air inlet channels 33, and the wave-shaped spoilers 32 can divide the sucked air flow into a plurality of air flows for the first time, so that the effects of silencing and reducing noise are achieved. In this embodiment, the air intake cover 3 is hollow to form a vortex channel 34, a first end of the vortex channel 34 is respectively communicated with the air intake channel 33 along a circumferential direction perpendicular to the first direction W, and a second end of the vortex channel 34 is communicated with the air inlet of the fan motor assembly 5 along the second direction X, so as to further reduce noise. Along the communication direction of the air inlet channel 33, two ends of the air inlet channel 33 are respectively provided with an air inlet 31 exposed at the periphery of the air inlet cover 3 and a narrow slit communicated with the vortex channel 34 so as to further reduce noise.

In a preferred embodiment, the closer to the swirl passage 34, the smaller the flow area of the intake passage 33 is in the communication direction of the intake passage 33; the closer to the intake port 31, the larger the flow area of the intake passage 33 is, so that noise is further reduced.

In a preferred embodiment, a rotating impeller 53 is provided within the fan motor assembly 5, the direction of the wave shaped protrusions of each wave shaped spoiler 32 being aligned with the direction of rotation of the impeller 53, the angle of entry of each air inlet channel 33 into the scroll channel 34 being varied to further reduce noise.

In a preferred embodiment, the side of each wave spoiler 32 facing the air inlet of the fan motor assembly 5 is provided with a concave arc-shaped notch 35 to lengthen the distance between the sucked air and the impeller, and also has the effect of assisting in silencing and reducing noise, thereby further reducing noise.

Fig. 13 is a perspective view of a fan motor assembly in the fan of the present invention. Fig. 14 is a sectional view taken along the direction E-E in fig. 13. Fig. 15 is an exploded view of a fan motor assembly in a fan of the present invention. Fig. 16 is a perspective view of an air outlet three-way seat in a fan motor assembly of a fan according to the present invention. As shown in fig. 13 to 16, the fan motor assembly 5 in the fan of the present invention includes: the air guide mask 51, the air guide cover 52, the impeller 53, the motor bracket 54, the motor 56, the motor cover 58 and the air outlet three-way seat 50 are sequentially combined along the first direction W. The air guide mask 51 is in sealing communication with the swirl passage 34 of the air intake shroud 3 and the air guide shroud 52.

Wherein, a plurality of first positioning seats 501 and a plurality of first screw lugs 508 are arranged around the periphery of the air outlet three-way seat 50. A motor 56 is arranged between the upper surface of the motor bracket 54 and the air outlet three-way seat 50, a plurality of second positioning seats 541 are arranged around the periphery of the motor bracket 54, and the motor bracket 54 is provided with a through hole for the rotating shaft of the motor 56 to pass through. A rotating impeller 53 is arranged between the lower surface of the motor bracket 54 and the air guide cover 52, the impeller 53 is in transmission connection with the motor 56 through a rotating shaft, and a plurality of third positioning seats 521 and a plurality of second screw connection lugs 522 are arranged around the periphery of the air guide cover 52. The air outlet three-way seat 50 is in screw connection with the air guiding cover 52, and after each second positioning seat 541 of the motor bracket 54 is connected with the first positioning seat 501 and the third positioning seat 521 through flexible connectors, the second positioning seat 541 is clamped and limited between the first positioning seat 501 and the third positioning seat 521, so that the motor bracket 54 in the embodiment is not fixed, but the motor bracket 54 is limited between the air guiding cover 52 and the air outlet three-way seat 50 based on flexible connectors of the same horizontal plane. This corresponds to the motor bracket 54 being suspended between the hood 52 and the outlet tee 50. The flexible connecting piece and each positioning seat together form a shock absorber, so that the motor bracket 54 can not contact the air guide cover 52 and the air outlet three-way seat 50 when the fan motor assembly 5 vibrates during working, and the contact points are all transmitted by the shock absorber, thereby greatly reducing noise and further keeping the stability of the fan.

In this embodiment, the top surface of the positioning damper pad 55 may be formed of a flat surface, and the purpose thereof is to convert upward vibration into a flat motion when vibration is generated in the power system, so as to balance the vibration. The lower part of the positioning vibration-damping pad 55 can be composed of a conical body, and the contact surfaces of the positioning vibration-damping pad and the conical body are all in bump contact, so that the contact area is reduced to achieve the vibration-damping effect. The middle of the positioning vibration-damping pad 55 is composed of a hollow blind hole, the purpose of which is to make the damper elastically deform by utilizing the middle blind hole when the power system vibrates, so as to achieve the vibration-damping effect, and the hole and the upper support form a closed hollow hole after assembly, so that the air in the blind hole is locked, and the air in the blind hole is quickly recovered to elastically deform under the action of air pressure when vibrating.

In a preferred embodiment, the first positioning seat 501, the second positioning seat 541 and the third positioning seat 521 are respectively provided with coaxial through holes, the flexible connection member is a nail-shaped positioning vibration-damping pad 55, and the positioning vibration-damping pad 55 passes through and holds the through holes of the first positioning seat 501, the second positioning seat 541 and the third positioning seat 521. The positioning vibration-damping pad 55 comprises a rod part, and an external expansion frustum and an external expansion shoulder which are respectively positioned at two ends of the rod part, wherein the maximum diameter of the external expansion frustum and the maximum diameter of the external expansion shoulder are both larger than those of the rod part, and the rod part passes through holes of the first positioning seat 501, the second positioning seat 541 and the third positioning seat 521 to clamp the first positioning seat 501, the second positioning seat 541 and the third positioning seat 521 between the external expansion frustum and the external expansion shoulder. The positioning vibration-damping pad 55 is provided with a hollow blind hole in the axial direction along the first direction W, the hollow blind hole extending from at least the outer expansion cone to the stem. Or the hollow blind hole extends from at least the flaring stack to the flaring stack.

In a preferred embodiment, an annular motor noise damping cotton 57 is provided around the outer circumference of the motor 56 between the motor bracket 54 and the air outlet tee 50, and noise caused by the high-speed rotation of the motor and the impeller is further reduced by the above-mentioned structure.

In this embodiment, the air outlet three-way seat 50 includes an air inlet 507 disposed at the air outlet side of the impeller, a first air outlet 504 and a second air outlet 505 respectively communicated with the nozzle 7, and a diversion wall 502 for diverting the air flow passing through the air inlet 507 and guiding the air flow to the first air outlet 504 and the second air outlet 505 respectively, wherein two ends of the nozzle body 70 are respectively communicated with the first air outlet 504 and the second air outlet 505. The air inlet 507 is located at a first side of the air outlet three-way seat 50, the diversion wall 502 is located at a center of a second side of the air outlet three-way seat 50, and the first air outlet 504 and the second air outlet 505 are respectively located at two ends of the second side of the air outlet three-way seat 50. The first air outlet 504 and the second air outlet 505 are respectively exposed at two sides of the body 10, and the air outlet direction of the first air outlet 504 and the air outlet direction of the second air outlet 505 are coaxial and are perpendicular to the air inlet direction of the air inlet 507. The two sides of the diversion wall 502 form a symmetrical first guiding slope and a second guiding slope respectively, the first guiding slope guides part of the air flow passing through the air inlet 507 to the first air outlet 504, and the second guiding slope guides part of the air flow passing through the air inlet 507 to the second air outlet 505. The protrusions at the two ends of the split wall 502 in the second direction X extend to the air inlet 507 along the second direction X respectively, so as to form a U-shaped split wall together, so that the air flow passing through the air inlet 507 can be split under the premise of reducing noise. In this embodiment, the diversion wall 502 is set based on the central axis of the air inlet 507, and equally divides the flow area of the air inlet 507. The inner wall of the air outlet three-way seat 50 is provided with guide vanes 506 extending from the air inlet 507 to the second side of the air outlet three-way seat 50 respectively, but not limited thereto. The inner wall of the air outlet three-way seat 50 is provided with a sinking diversion step extending from the first guiding slope to the first air outlet 504, and the sinking distance of the sinking diversion step is larger as the sinking diversion step is closer to the first air outlet 504; the inner wall of the air outlet three-way seat 50 is provided with a sinking diversion step extending from the second guiding slope to the second air outlet 505, and the closer to the second air outlet 505, the larger the sinking distance of the sinking diversion step is, so as to reduce the noise of air flow steering and provide space for the base 6, but not limited thereto. The air outlet three-way seat 50 integrates diversion and flow division, greatly reduces the height of the fan motor assembly 5, and further reduces the total height and the volume of the whole fan.

In a preferred embodiment, the inner wall of the air outlet three-way seat 50 is provided with a deflector extending from the air inlet 507 to the first air outlet 504 or the second air outlet 505, but not limited thereto.

The air inlet 507 is an annular nozzle, the distance from the nozzle of the annular nozzle to the first air outlet 504 or the second air outlet 505 along the first direction W is d, the diameters of the first air outlet 504 and the second air outlet 505 are h, and the ratio of d to h ranges from 2.0 to 3.5. After the air flow generated by the impeller 53 enters the air inlet 507 of the air outlet three-way seat 50, the air flow will need to rotate at least 90 degrees in a short distance, if the ratio of d to h is too small, the air pressure of the air flow is reduced, the air outlet is reduced, and the air supply distance is affected; conversely, if the ratio of d to h is too large, a negative vortex is formed, and a turbulent flow is formed, which produces a large noise.

In a preferred embodiment, the ratio of d to h ranges from one of the following: 2.1 to 3.4;2.2 to 3.3;2.3 to 3.2;2.4 to 3.1;2.5 to 3.0;2.6 to 2.9;2.7 to 2.8.

In a preferred embodiment, the ratio of d to h is 2.7.

Fig. 17 to 20 are schematic views illustrating an installation process of the fan of the present invention. As shown in fig. 17 to 20, the fan of the present invention is installed as follows: firstly, the air inlet cover 3, the air inlet bracket 14, the fan motor assembly 5 and the base 6 are connected through the first inner shell 4. The nozzle 7 with the annular shoulders 74 at two ends is inserted into the semicircular limit groove 41 exposed out of the inner shell 4 along the horizontal direction, so that the first air inlet 72 and the second air inlet 73 of the annular shoulders 74 are respectively communicated with the first air outlet 504 and the second air outlet 505 of the air outlet three-way seat 50 of the fan motor assembly 5 and are sealed by the sealing ring 59. Next, the second inner housing 4 is fastened to the first inner housing 4 by screwing through the screw hole 42, and the annular shoulder 74 is engaged in the annular groove formed by combining the two semicircular limit grooves, so that the nozzle 7 can rotate based on the annular groove. Then, the two outer shells 8 are buckled on the periphery of the inner shell 4, the side support frames 13 are installed, and then the upper ends of the side support frames 13 and the upper ends of the outer shells 8 are connected together in a threaded manner through the annular connecting frames 12. Finally, the filter 2 is placed in a space between the inner wall of the housing 8 and the outer periphery of the intake cover 3, and the filter 2 is sealingly held between the top cover 11 and the intake bracket 14 by rotational locking of the top cover 11 and the annular connecting frame 12.

The installation method changes the method of sleeving the nozzle 7 on the body part along the vertical direction in the prior art, is more beneficial to sealing the air duct and reduces the installation difficulty.

Fig. 21 to 23 are schematic views showing a first filter flow state of the fan according to the present invention. As shown in fig. 21 to 23, the first method for replacing a filter by a fan according to the present invention employs an upper fan, and the replacement process is as follows:

the filter 2 to be replaced is separated in the body 10.

The filter 2 to be replaced is introduced from the body 10 into the accommodation space 75 in the second direction X.

The filter 2 to be replaced is removed from the accommodation space 75 along the replacement path out of the accommodation space 75.

The unused filter 2N is moved into the accommodation space 75 along the replacement passage.

The unused filter 2 is pressed from the accommodation space 75 into the body 10 in the first direction W.

The unused filter 2 is combined in the body 10.

In a preferred embodiment, the filter 2 is a tubular air screen, and the fan further comprises a top cover 11 crimped to a first side of the tubular air screen in a first direction W and an air intake bracket 14 supporting a second side of the tubular air screen in a second direction X.

The separation of the filter 2 to be replaced comprises: the top cover 11 is separated from the body 10, exposing the filter 2 to be replaced, and the body 10 is pulled out of the air intake bracket 14 by the filter 2 in the second direction X.

The combination of the unused filter 2 includes: the filter 2 is self-pressed in the first direction W to the air intake bracket 14 of the body 10, and the top cover 11 is combined with the body 10 to close the unused filter 2.

If the top cover 11 is provided with a function expanding member, the top cover 11 is unscrewed after the function expanding member is removed in the same manner, and the description is omitted here.

The fan in this embodiment changes the filter screen and only needs a part to disassemble the action (just can change the filter screen just to pull down top cap 11), also only need change the filter screen once, has alleviateed the work load and the time of changing the filter screen greatly, has improved humanized experience.

Fig. 24 to 27 are schematic views showing a second filter flow state of the fan according to the present invention. As shown in fig. 24 to 27, the second method for replacing a filter by a fan according to the present invention employs an upper fan, and the replacement process is as follows:

the nozzle body 70 is rotated to the second state.

The filter 2 to be replaced is separated in the body 10.

The filter 2 is pulled out of the body 10 in the second direction X, and the filter 2 is removed from the fan while avoiding the nozzle body 70.

The unused filter 2N is pressed into the body 10 in the second direction X avoiding the nozzle body 70.

The unused filter 2 is combined in the body 10.

The nozzle body 70 is rotated to the first state.

Likewise, the fan in this embodiment only needs one component disassembly action (only the top cover 11 is disassembled to replace the filter screen), and only needs one filter screen replacement, so that the workload and time for replacing the filter screen are greatly reduced, and the humanized experience is improved.

In summary, the fan and the method for replacing the filter by the fan can change the movement direction of the air flow in the fan, reduce the whole volume and reduce the use cost.

The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims

1. A fan, comprising:

-a body (10) comprising an air inlet, an air outlet, a removable filter (2) and a fan motor assembly (5) for generating an air flow, said air flow passing through said body (10) in a first direction; and

-a nozzle (7) connected to the air outlet for receiving an air flow from the body (10) and emitting the air flow, the air flow entering the nozzle (7) with the air flow, the air flow being emitted out of the nozzle (7) after movement at least based on a second direction opposite to the first direction;

the air outlet of the fan motor assembly (5) is connected with two guide air passages, the guide air passages are respectively communicated with openings at two sides of the body part (10), the nozzle (7) is provided with a half-frame type nozzle body (70), the nozzle body (70) is bridged on a first side surface of the body part (10) facing the first direction, two ends of the nozzle body (70) are respectively communicated with the openings, a containing space (75) is formed by surrounding between the first side surface and the first side surface of the nozzle body (70), the containing space (75) is provided with at least one replacement channel for the filter (2) to enter and exit the containing space (75), the extending direction of the replacement channel is perpendicular to the second direction, the filter (2) is provided with a first stroke for the filter (75) to enter and exit the containing space (75) from the body part (10) along the second direction, the second stroke for the filter (2) enters and exits from the replacement channel, the height of the containing space (75) and the width of the filter (2) are equal to the gravity force of gravity in the direction along the first direction, the gravity is equal to the width of the air channel (2) along the direction of the air inlet (10), the fan motor assembly (5) is located in a region between the air inlet and the air outlet.

2. A fan according to claim 1, wherein the filter (2) is a tubular air screen, the axial direction of which is arranged in the first direction, the fan further comprising a top cover (11) crimped to a first side of the tubular air screen in the first direction and an air inlet bracket (14) supporting a second side of the tubular air screen in the second direction.

3. The fan according to claim 1, characterized in that the nozzle (7) has at least one outlet duct, the direction of extension of which is parallel to the first direction, the air flow passing through the outlet duct in a second direction, the body (10) having at least one guide duct changing the direction of the air flow, the guide duct extending in a third direction perpendicular to the first direction, communicating the air outlet of the fan-motor assembly (5) and the nozzle (7), respectively.

4. A fan according to claim 3, wherein the nozzle body (70) is provided with at least one air outlet opening (71) opening in a fourth direction perpendicular to a plane formed by the first and third directions, the replacement passage being parallel to the fourth direction.

5. The fan according to claim 4, characterized in that the accommodation space (75) has two exchange channels arranged in the fourth direction.

6. A method of replacing a filter with a fan as claimed in claim 1, comprising the steps of:

-separating the filter (2) to be replaced in the body (10);

-entering the filter (2) to be replaced from the body (10) into the containing space (75) along a second direction;

-removing the filter (2) to be replaced from the accommodation space (75) along the replacement channel out of the accommodation space (75);

-moving unused filters along the exchange channel into the receiving space (75);

-pressing the unused filter (2) from the receiving space (75) into the body (10) in a first direction;

-combining the unused filter (2) in the body (10).

7. A method of changing a filter for a fan according to claim 6, wherein the filter (2) is a tubular air screen, the fan further comprising a top cover (11) crimped to a first side of the tubular air screen in the first direction and an air inlet bracket (14) supporting a second side of the tubular air screen in the second direction;

The separation of the filter (2) to be replaced comprises: -separating the top cover (11) from the body (10), exposing the filter (2) to be replaced, extracting the filter (2) from the air intake bracket (14) in a second direction from the body (10);

-when combining the filter (2) not in use, comprising: -self-pressing the filter (2) in a first direction to the air intake bracket (14) of the body (10), -combining the top cover (11) with the body (10) closing the filter (2) unused.

8. A method of changing a filter for a fan according to claim 6, wherein the nozzle (7) has at least one outlet duct, the direction of extension of which is parallel to the first direction, the air flow passing through the outlet duct in a second direction, the body (10) has at least one guide duct for changing the direction of the air flow, the guide duct extending in a third direction perpendicular to the first direction, the air outlet of the fan motor assembly (5) and the nozzle (7) being respectively connected, the nozzle body (70) being provided with at least one outlet opening (71) opening in a fourth direction, the fourth direction being perpendicular to a plane formed by the first direction and the third direction together, the changing duct being parallel to the fourth direction.