阅读说明：本技术 一种风道可变的冷暖循环扇 (Air duct variable cooling and heating circulating fan ) 是由 赖伴来 庞亚鹏 于 2020-08-11 设计创作，主要内容包括：本发明公开了一种风道可变的冷暖循环扇,在位于风叶与发热组件之间的后网罩上设有一段径向进风通道,后网罩的前端形成一段密闭环形风道,密闭环形风道与径向进风通道连接,径向进风通道处还设有多个挡风片,挡风片的两端分别设有转轴和限位轴,径向进风通道的两端分别设有多个具有定位孔和限位长孔的前支撑板和后支撑板,挡风片两端的转轴和限位轴分别置于前支撑板和后支撑板对应的定位孔和限位长孔中,且挡风片的转轴以定位孔的中心为轴心,限位轴沿着限位长孔旋转；挡风片的宽度尺寸大于等于相邻两挡风片间所形成的径向进风间隙的宽度尺寸。本发明在冷风和暖风之间进行切换使用,可以完全避免在暖风时掺杂冷风的现象,有效改善用户体感。(The invention discloses a cold-warm circulating fan with variable air channels, wherein a section of radial air inlet channel is arranged on a rear mesh enclosure positioned between a fan blade and a heating component, a section of closed annular air channel is formed at the front end of the rear mesh enclosure, the closed annular air channel is connected with the radial air inlet channel, a plurality of wind blocking sheets are also arranged at the radial air inlet channel, rotating shafts and limiting shafts are respectively arranged at two ends of the wind blocking sheets, a front supporting plate and a rear supporting plate which are provided with positioning holes and limiting long holes are respectively arranged at two ends of the radial air inlet channel, the rotating shafts and the limiting shafts at two ends of the wind blocking sheets are respectively arranged in the positioning holes and the limiting long holes corresponding to the front supporting plate and the rear supporting plate, the rotating shafts of the wind blocking sheets use the centers of the positioning holes as axes, and the limiting shafts rotate along the limiting long holes; the width dimension of the wind-blocking sheet is larger than or equal to the width dimension of a radial air inlet gap formed between two adjacent wind-blocking sheets. The invention switches between cold air and warm air, can completely avoid the phenomenon of doping cold air during warm air, and effectively improves the user body feeling.)

1. A cooling and heating circulating fan with a variable air duct comprises a rear mesh enclosure (11), a driving device (12), a heating assembly (13) and fan blades (14), wherein the driving device (12) and the heating assembly (13) are arranged in the rear mesh enclosure (11), and a rotating shaft of the driving device (12) penetrates through the heating assembly (13) and then is connected with the fan blades (14); the fan blade-heating device is characterized in that a section of radial air inlet channel (111) is further arranged on the rear mesh enclosure (11) between the fan blade (14) and the heating component (13), a section of closed annular air duct (112) is formed at the front end of the rear mesh enclosure (11), the closed annular air duct (112) is connected with the radial air inlet channel (111), a plurality of wind blocking sheets (15) are further arranged at the position of the radial air inlet channel (111) and are axially parallel to the fan blade (14), a rotating shaft (151) and a limiting shaft (152) extending along the length direction of the wind blocking sheets (15) are respectively arranged at the two ends of the radial air inlet channel (111), a front supporting plate (16) and a rear supporting plate (17) are respectively arranged at the two ends of the radial air inlet channel (111), a plurality of positioning holes (a) and a plurality of limiting long holes (b) which are arranged in a one-to-one correspondence along the axial direction are respectively arranged on the circumferential direction of the front supporting plate (16) and the rear supporting plate (17), the rotating shaft (151) and the limiting shaft (152) at two ends of the wind shield piece (15) are respectively arranged in a positioning hole (a) and a limiting long hole (b) corresponding to the front supporting plate (16) and the rear supporting plate (17), the wind shield piece (15) takes the center of the positioning hole (a) as an axis, and the limiting shaft (152) rotates along the limiting long hole (b); the width dimension of the wind-blocking sheet (15) is larger than or equal to the width dimension of a radial wind inlet gap (c) formed between two adjacent wind-blocking sheets (15).

2. The cooling and heating circulating fan with variable air duct according to claim 1, wherein the radial air intake channel (111) is disposed on the rear mesh enclosure (11) in a 360-degree surrounding manner, and is composed of a plurality of rows of spacing strips (1111) axially disposed on the rear mesh enclosure (11), and a radial air intake gap (c) is formed between two adjacent spacing strips (1111).

3. The cooling and heating circulating fan with variable air duct according to claim 2, wherein the positioning holes (a) on the front support plate (16) and the rear support plate (17) and the spacers (1111) are correspondingly arranged on the same radial direction of the rear mesh enclosure (11), and a radial air inlet gap (c) formed when two adjacent wind blocking sheets (15) are opened is in one-to-one correspondence with a radial air inlet gap (c) formed between two adjacent spacers (1111).

4. A cooling and heating circulating fan with variable air duct according to claim 3, wherein the spacers (1111) are arranged at equal intervals along the circumferential direction of the radial air intake channel (111).

5. A cooling and heating circulation fan with a variable air duct according to any one of claims 1-4, wherein the front support plate (16) and the rear support plate (17) are vertically disposed on the outer side of the rear mesh enclosure (11), and the axial distance between the front support plate (16) and the rear support plate (17) is greater than or equal to the axial dimension of the radial air intake channel (111).

6. The cooling and heating circulation fan with variable air duct according to claim 5, wherein a swing ring (18) is further disposed on the closed annular air duct (112) located outside the front support plate (16), a plurality of swing limiting holes (d) corresponding to the limiting long holes (b) in one-to-one correspondence are disposed along the circumferential direction of the swing ring (18), and a limiting shaft (152) at one end of the wind shielding plate (15) sequentially penetrates through the limiting long holes (b) on the front support plate (16) and the swing limiting holes (d) on the swing ring (18).

7. The cooling and heating circulating fan with variable air duct according to claim 6, wherein the swinging ring (18) provided along the outer circumferential surface of the closed annular air duct (112) is divided into a plurality of swinging rings, and each swinging ring independently controls the swinging angle of the windshield (15) in the corresponding area.

8. A cooling and heating circulating fan with variable air duct according to claim 7, characterized in that an annular groove (1121) is further provided on the outer circumferential surface of the closed annular air duct (112), the swinging ring (18) is rotatably disposed in the annular groove (1121), and the rotation direction of the swinging limiting hole (d) on the swinging ring (18) is opposite to the rotation direction of the limiting long hole (b) on the front supporting plate (16).

9. The cooling and heating circulating fan with the variable air duct according to claim 1, wherein the heating assembly (13) comprises a heating bracket (131) and a heating element (132), a circumferential closed axial air duct (e) is formed in the heating bracket (131), the heating element (132) is fixed in the axial air duct (e) of the heating bracket (131), the heating bracket (131) and the rear mesh enclosure (11) form a detachable fixed connection, and axial air generated by rotation of the fan blade (14) sequentially enters the closed annular air duct (112) through the axial air duct (e) and the heating element (132) to be discharged.

10. A cooling-heating circulating fan with variable air duct according to claim 9, characterized in that the axial air duct (e) is a tapered air duct, and the ventilation cross-sectional dimension of the axial air duct (e) is gradually reduced in the direction toward the fan blades (14).

Technical Field

The invention relates to the technical field of air conditioning, in particular to a cold and warm circulating fan with a variable air duct.

Background

The warmer or the fan is a necessary electrical appliance for modern families, and at present, the warmer or the fan is a single warmer or a single fan on the market, so that products which can really integrate the warming function of the warmer and the blowing function of the fan are few and few, in particular to a cold-warm type circulating fan. The cooling and heating type circulating fan can be used as a heater and a fan, and has the advantages of cooling and heating, and multiple purposes. Because the cooling and heating type circulating fan is fixed in product structure, the axial flow fan blades synchronously supply air in the radial direction and the axial direction, and the air supply quantity is large. When hot air needs to be blown out, cold air is also mixed in the blown hot air, and particularly the body feeling of the periphery of the whole front net is not ideal.

For example, chinese patent document CN 206903897 discloses a natural wind/warm wind dual-purpose electric circulation fan, in which when the fan is used as a heater, radial inlet wind does not pass through a heating element, and thus cold wind is obviously mixed in blown hot wind, and the wind force is strong, so that the feeling of the user is not ideal. In order to solve the heating problem of the axial flow fan blade in the cooling and heating circulating fan, the existing cooling and heating circulating fan needs to be structurally optimized, and the comfort of people in heating is met on the premise of not influencing the cold air quantity.

Disclosure of Invention

The invention aims to solve the technical problems that the existing axial-flow type cooling and heating circulating fan is large in heating air quantity and poor in body feeling effect due to the fact that unheated cold air is doped, and therefore the invention provides a cooling and heating circulating fan with a variable air channel.

In order to achieve the purpose, the invention adopts the following technical scheme:

a cooling and heating circulating fan with a variable air duct comprises a rear mesh enclosure, a driving device, a heating assembly and fan blades, wherein the driving device and the heating assembly are arranged in the rear mesh enclosure, and a rotating shaft of the driving device penetrates through the heating assembly and then is connected with the fan blades; a radial air inlet channel is further arranged on the rear mesh enclosure between the fan blades and the heating component, a section of closed annular air channel is formed at the front end of the rear mesh enclosure, the closed annular air channel is connected with the radial air inlet channel, a plurality of wind blocking sheets which are arranged in parallel with the axial direction of the fan blades are further arranged at the radial air inlet channel, rotating shafts and limiting shafts which extend along the length direction of the wind blocking sheets are respectively arranged at the two ends of the wind blocking sheets, a front supporting plate and a rear supporting plate are respectively arranged at the two ends of the radial air inlet channel, a plurality of positioning holes and limiting long holes which are arranged in one-to-one correspondence in the axial direction are respectively arranged in the circumferential direction of the front supporting plate and the rear supporting plate, the rotating shafts and the limiting shafts at the two ends of the wind blocking sheets are respectively arranged in the positioning holes and the limiting long holes which correspond to the front supporting plate and the rear supporting plate, and the wind blocking sheets take the centers of the positioning holes as axes, the limiting shaft rotates along the limiting long hole; the width dimension of the wind-blocking sheet is larger than or equal to the width dimension of a radial air inlet gap formed between two adjacent wind-blocking sheets.

Preferably, the radial air inlet channel is 360 degrees and encircles the setting and is in on the back screen panel, it is in by the axial setting multirow parting bead on the back screen panel is constituteed, forms radial air inlet clearance between two adjacent parting beads.

The positioning holes in the front supporting plate and the rear supporting plate correspond to the parting strips and are arranged on the same radial direction of the rear mesh enclosure, and the radial air inlet gaps formed when the two adjacent wind blocking sheets are opened correspond to the radial air inlet gaps formed between the two adjacent parting strips one by one.

The parting beads are arranged at equal intervals along the circumferential direction of the radial air inlet channel.

Further preferably, preceding backup pad and back backup pad be perpendicular set up in the lateral surface of back screen panel, the axial interval more than or equal to of preceding backup pad and back backup pad radial air inlet channel's axial dimension.

Still further, be located the preceding backup pad outside still be equipped with the swing ring on the airtight annular wind channel, follow be equipped with a plurality of on the circumferencial direction of swing ring with spacing slot hole position one-to-one's swing spacing hole, the spacing axle of windshield piece one end runs through in proper order spacing slot hole on the preceding backup pad with spacing hole of the last swing of swing ring.

Furthermore, the swinging ring arranged on the outer circumferential surface of the closed annular air duct is divided into a plurality of sections of swinging rings, and each section of swinging ring independently controls the swinging angle of the wind shield in the corresponding area.

The outer circumferential surface of the closed annular air duct is also provided with an annular groove, the swinging ring is rotatably arranged in the annular groove, and the rotating direction of the swinging limiting hole on the swinging ring is opposite to the rotating direction of the limiting long hole on the front supporting plate.

The heating assembly comprises a heating support and a heating body, wherein a circumferential closed axial ventilation channel is formed in the heating support, the heating body is fixed in the axial ventilation channel of the heating support, the heating support is fixedly connected with a rear mesh cover in a detachable and fixed mode, and axial wind generated by rotation of the fan blade sequentially passes through the axial ventilation channel and the heating body and is discharged from the closed annular air channel.

The axial ventilation channel is a conical air channel, and the size of the ventilation cross section of the axial ventilation channel is gradually reduced in the direction of approaching the fan blades.

The inner side of the front end of the rear mesh enclosure is further provided with a front mesh, the front mesh is detachably and fixedly connected with the inner side surface of the closed annular air duct, and when the radial air inlet channel is opened, axial wind and radial wind generated by rotation of the fan blades are discharged through the front mesh.

The cold and warm circulating fan is further provided with a base, and the outer side face of the rear mesh enclosure is rotatably connected with the base.

The technical scheme of the invention has the following advantages:

A. the plurality of wind blocking sheets capable of being turned over are arranged at the radial wind inlet channel position of the rear mesh enclosure, the limiting shafts at two ends of each wind blocking sheet can swing along the limiting long holes on the front supporting plate and the rear supporting plate to open and close the radial wind inlet channel, and the wind blocking sheets are switched between cold wind and warm wind, so that the phenomenon of doping cold wind during warm wind can be completely avoided, and the user feeling is effectively improved; simultaneously, when cold wind, can also utilize the windshield piece to adjust radial air intake size of radial air inlet channel, through the regulation to radial cold wind intake, realize the control to the air-out total amount, experience feels stronger.

B. According to the invention, the conical axial ventilation channel is established, the air around is effectively collected to form the air inlet flow, the air inlet flow is uniformly blown out in a concentrated manner, the blowing sense is stronger, the structure is simple, the structural form is novel, the opening and closing control of the radial air inlet channel is realized by the overturning of the wind shield, the radial air inlet quantity is well regulated and controlled, and the user obtains softer experience during heating on the premise of not reducing the air inlet quantity of the axial ventilation channel.

C. According to the invention, the plurality of wind-shielding sheets are arranged on the circumference of the rear mesh enclosure, so that the wind-shielding sheets in different areas can be independently subjected to angle adjustment, and the conical axial ventilation channel is established in a matched manner, thereby fully optimizing the performance of the product in a warm air state, simultaneously enabling the environment in a certain space range to reach a preset heating temperature after being rapidly heated, shortening the heating time, enabling a user to be warmed in the shortest time and enabling the experience to be more comfortable.

Drawings

In order to more clearly illustrate the embodiments of the present invention, the drawings which are needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained from the drawings without inventive labor to those skilled in the art.

FIG. 1 is a schematic diagram illustrating a state where a wind-shielding sheet is cooled when it is opened according to the present invention;

FIG. 2 is a schematic view of the present invention with the windshield closed in a warm air state;

FIG. 3 is a cross-sectional view of the entire device provided by the present invention;

FIG. 4 is a schematic view of the upper portion of FIG. 3 showing the connection of the swing ring, the windshield and the front and rear support plates;

FIG. 5 is a schematic view of the features of the swing ring, the rear net cover, and the wind-guard plate according to the present invention;

FIG. 6 is a schematic view of the radial and axial air intake directions;

FIG. 7 is a schematic sectional view of the windshield after opening;

fig. 8 is a schematic sectional view of the windshield after closing.

The labels in the figure are as follows:

1-fuselage

11-rear net cover

111-radial air inlet channel, 1111-division strip

112-sealed annular air duct, 1121-annular groove

113-air inlet grille

12-drive device

121-motor, 122-motor cover

13-heating assembly

131-heating support, 132-heating body

14-Fan blade

15-wind-guard sheet

151-rotating shaft, 152-limiting shaft

16-front support plate, 17-rear support plate

18-swinging ring, 181-toggle handle

19-front net, 191-front net annulus.

2-base.

a-positioning hole, b-limiting long hole, c-radial air inlet gap and d-swinging limiting hole

e-axial ventilation ducts.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, 2 and 3, the cooling and heating circulation fan with a variable air duct according to the present invention includes a rear mesh enclosure 11, a driving device 12, a heating element 13 and a fan blade 14, wherein the driving device 12 and the heating element 13 are disposed in the rear mesh enclosure 11, and a rotating shaft of the driving device 12 penetrates through the heating element 13 and is connected to the fan blade 14; a radial air inlet channel 111 is further arranged on the rear mesh enclosure 11 between the fan blade 14 and the heating component 13, a closed annular air channel 112 is formed at the front end of the rear mesh enclosure 11, the closed annular air channel 112 is connected with the radial air inlet channel 111, a plurality of wind shielding sheets 15 are further arranged at the radial air inlet channel 111 and are parallel to the axial direction of the fan blade 14, a rotating shaft 151 and a limiting shaft 152 extending along the length direction of the wind shielding sheets 15 are respectively arranged at two ends of the radial air inlet channel 111, a front support plate 16 and a rear support plate 17 are respectively arranged at two ends of the radial air inlet channel 111, a plurality of positioning holes a and limiting long holes b which are arranged in a one-to-one correspondence manner in the axial direction are respectively arranged along the circumferential direction of the front support plate 16 and the rear support plate 17, as shown in fig. 4 and 5, the rotating shaft 151 and the limiting shaft 152 at two ends of the wind shielding sheets 15 are respectively arranged in the positioning holes a and the limiting long holes b corresponding to the front support plate 16 and the rear support plate 17, and the wind shielding sheets 15 take the center of the positioning holes a as the center of the positioning hole a, the stopper shaft 152 rotates along the stopper long hole b; the width dimension of the wind-blocking sheet 15 is greater than or equal to the width dimension of the radial wind-inlet gap c formed between two adjacent wind-blocking sheets 15, when the wind-blocking sheet 15 rotates to the lower end of the wind-blocking sheet along the limiting long hole, the radial wind-inlet gap c formed in the ring direction is sealed and covered to prevent radial wind-inlet, as shown in fig. 2, of course, when the limiting shaft 152 of the wind-blocking sheet rotates to the upper end of the limiting long hole b, the wind-blocking sheet 15 is radially arranged, the radial wind-inlet gap c at this time is communicated with the outside, and the radial wind-inlet channel 111 is opened, as shown in fig. 1. By controlling the rotational position of the wind-blocking flap 15, the radial air intake control of the radial air intake channel 111 can be realized. As shown in fig. 3, the driving device 12, the shaft, the front net 19, the rear net 11, and the fan blades 14 of the present invention are arranged in a central axis, and particularly, the rear net 11, the heating bracket 131, and the closed annular air duct 12 are arranged in a central axis.

The rear mesh enclosure 11 adopted in the present invention is in a mesh shape except for the closed annular air duct 112, the driving device 12 is installed at the bottom of the inner cavity of the rear mesh enclosure 11, and includes a motor 121 and a motor cover 122, and the motor cover 122 covers the motor 121 and is fixed with the rear mesh enclosure 11.

In the invention, the radial air inlet channel 111 is arranged on the rear mesh enclosure 11 in a 360-degree surrounding manner and consists of a plurality of rows of division bars 1111 axially arranged on the rear mesh enclosure 11, as can be clearly seen from fig. 5, a radial air inlet gap c is formed between two adjacent division bars 1111, and the radial air inlet channel can form a plurality of radial air inlet gaps in the circumferential direction of the whole rear fan cover and has enough radial air inlet amount when cold air is needed.

As can be seen from fig. 5, the positioning holes a provided on the front support plate 16 and the rear support plate 17 are provided in the same radial direction of the rear mesh enclosure 11 corresponding to the parting strips 1111, that is: each positioning hole a on the front supporting plate 16 and the rear supporting plate 17 is arranged above each parting bead, and a radial air inlet gap c formed when two adjacent wind-blocking sheets 15 are opened corresponds to a radial air inlet gap c formed between two adjacent parting beads 1111 one by one. The limiting shafts at the two ends of the wind shield pieces swing in the limiting long holes, when the radial air inlet gaps c are opened, external air directly enters the gaps between the two parting strips from the gaps between the two wind shield pieces, and the two radial air inlet gaps c are arranged in a straight-through mode. Of course, the gap between the two division bars and the gap formed between the two wind-blocking sheets in the open state may also adopt a non-through mode, the radial air inlet channel may also not adopt the structure of the division bars, and may also adopt the structure of the air vent, which is not described herein again.

Of course, the plurality of division bars in the circumferential direction of the radial air inlet channel are preferably arranged at equal intervals, and of course, the arrangement at unequal intervals can also be adopted. As shown in fig. 4, the front support plate 16 and the rear support plate 17 are vertically disposed on the outer side surface of the rear mesh enclosure 11, which is a preferred embodiment of the present invention, wherein the axial distance between the front support plate 16 and the rear support plate 17 is greater than or equal to the axial dimension of the radial air inlet channel 111, so that whether a plurality of radial air inlet gaps formed on the entire radial air inlet channel 111 are communicated with the outside or not is completely controlled by a plurality of wind deflectors located between the front support plate and the rear support plate.

In order to facilitate the synchronous control of the wind deflectors 15 and achieve uniform synchronous wind inlet in the circumferential direction, a swing ring 18 is further disposed on the closed annular air duct 112 located outside the front support plate 16, and a plurality of swing limiting holes d corresponding to the limiting long holes b one by one are disposed along the circumferential direction of the swing ring 18, as shown in fig. 5. The limit shaft 152 at one end of the windshield 15 penetrates the limit long hole b on the front support plate 16 and the swing limit hole d on the swing ring 18 in sequence. The structure of the wind-guard sheet 15 is a rectangular plate, the two ends of the rectangular plate are respectively provided with a rotating shaft and a limiting shaft, the limiting shaft 152 is positioned above the rotating shaft 151, the rotating shaft 151 and the limiting shaft 152 at the other end of the wind-guard sheet 15 are arranged in the positioning hole a and the limiting long hole b of the rear supporting plate 17, and the positioning hole a and the limiting long hole b on the front supporting plate 16 are completely the same as the positioning hole a and the limiting long hole b on the rear supporting plate 17 in the set positions.

The swing ring 18 is an annular sheet member, and similarly has swing limit holes d corresponding to the number and corresponding positions of the limit long holes b; the number of the swing limiting holes d depends on the number of the swing trajectory lines, and the present invention is not particularly limited.

To assist in dialing wobble ring 18, the present invention also provides a toggle handle 181 on wobble ring 18, as shown in FIG. 5. Of course, an automatic shifting mode may also be adopted, the swing ring is required to synchronously drive the wind-blocking sheet to swing, and the radial wind inlet channel may be closed and opened, and the automatic driving mode may be basically formed by a transmission structure and a motor drive, for example, the electric push rod drives the swing ring 18 to rotate left and right, which is not specifically described herein, but only as another embodiment of the driving mode.

As shown in fig. 4, an annular groove 1121 is further formed on the outer circumferential surface of the closed annular air duct 112, the swing ring 18 is rotatably disposed in the annular groove 1121, and the rotation direction of the swing limiting hole d on the swing ring 18 is opposite to the rotation direction of the limiting long hole b on the front support plate 16, which further facilitates the positioning of the wind-blocking sheet, as shown in the exploded view of fig. 5.

Of course, the swing ring 18 disposed along the outer circumferential surface of the closed annular air duct 112 may be divided into a plurality of sections, and the swing angle of each section of the swing ring 18 may be independently controlled for each of the plurality of wind-blocking sheets. Namely, each swinging ring 18 can control a group of the plurality of wind-shielding sheets 15, the swinging rings 18 can independently adjust the angles of the plurality of groups of the wind-shielding sheets 15 out of synchronization, and the synchronous or out-of-synchronization wind inlet in the directions of the upper side, the lower side, the left side or the right side of the circulating fan can be realized, so that the experience feeling is better.

As shown in fig. 3, the heating assembly 13 includes a heating bracket 131 and a heating element 132, a circumferentially sealed axial air duct e is formed in the heating bracket 131, the heating element 132 is fixed in the axial air duct e of the heating bracket 131, and the heating bracket 131 and the rear mesh enclosure 11 form a detachable fixed connection, so that the wind generated by the wind blade 14 enters the sealed annular air duct 112 through the axial air duct e and the heating element 132 to be discharged. The axial air duct e is preferably a tapered air duct, and the ventilation cross-sectional dimension of the axial air duct e gradually decreases in the direction toward the fan blades 14. The shaft of the motor 121 sequentially passes through the motor cover 122, the heating body 132 and the heating bracket 131, and the fan blade 14 is fixed to the shaft end of the motor 121.

As shown in fig. 3 and 4, a front net ring surface 191 of the front net 19 extends into the closed annular air duct 112 and forms a detachable fixed connection with the inner side surface of the closed annular air duct 112, and the formed radial wind and axial wind enter the front net ring surface 191 and are discharged from the front net 19. As shown in fig. 1, the outer side surface of the rear mesh enclosure 11 forms a rotating connection with the base 2, so that the adjustment of the blowing angle can be realized, and the structure of the base 2 is not described herein again, which belongs to the prior art.

As shown in fig. 8, when the warm air needs to be used, the swing ring 18 is manually shifted along the circumference, the swing ring 18 drives the wind deflector set to swing, and the radial air inlet channel 111 is closed, as shown in fig. 2, so that the air inlet channel and the air inlet volume can be reduced; only axial air inlet can make the wind coming out of the front net 19 warmer and make the warm wind more uniform.

As shown in fig. 7, when cold air is needed, the swinging ring 18 is manually pushed along the circumference in the reverse direction, the swinging ring 18 drives the wind deflector group to swing, the radial air inlet channel 111 is opened, as shown in fig. 1, air is fed in both radial and axial directions, the air inlet channel and the air inlet amount can be increased, and the air volume coming out of the front net 19 is larger and cooler.

As mentioned above, the process of opening and closing the radial air intake channel 111, which is the two most basic states of the implementation of the present invention, can also be between these two states, namely: the wind shield group is divided into a plurality of subareas, the swinging ring 18 is synchronously divided into a plurality of corresponding subareas, the radial air inlet channel can be closed and opened, and the state of adjusting the radial air inlet size can be randomly selected in real time; the size of the opening and closing depends on the actual design requirements of the product; the manual and automatic opening and closing manner also depends on the positioning of the product, and the invention is not limited and described in detail.

Each of the windshields 15 used in the present invention can swing and have the function of sequentially covering the radial air intake gap c. The size and the area of each wind shield sheet 15 in the plurality of wind shield sheets are equal to those of the radial air inlet channel 111, namely the size and the area of the radial air inlet gap; and each wind shield piece can swing movably, and after the wind shield pieces are movably connected by the swinging rings, all the wind shield pieces connected with the same swinging ring can swing synchronously, so that the operation is convenient and the structure is simple.

According to the cold and warm circulating fan structure with the variable air channel, the same number of swingable wind blocking sheets are arranged on a circle of the circulating fan close to the fan blades, namely the radial wind inlet channel, according to the number of the wind inlet channel partition bars, the radial wind inlet channel is opened and closed, the cold and warm wind can be switched for use, the wind blocking sheets are used for adjusting the wind inlet amount, the phenomenon of doped cold wind during warm wind is improved, the user body feeling is obviously improved, and the experience feeling and the product performance of a user are integrally improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.