A cooling and heating circulation fan with variable air duct

Abstract

The present invention discloses a variable air duct cooling and heating circulation fan, the two ends of the axial air duct are open and connected to the rear mesh cover, the heating component is arranged in the axial air duct, the fan blade is located outside the air outlet end of the axial air duct, and the rear mesh cover located between the air outlet end of the axial air duct and the fan blade is also provided with a radial air inlet, and a section of a closed annular air duct is formed on the rear mesh cover located at the front end of the fan blade, and the rear mesh cover is also provided with a switch device for controlling the opening and closing of the radial air inlet. When the switch device is controlled to make the radial air inlet in an open state, external air enters through the radial air inlet to form radial wind, and is mixed with the axial wind generated in the axial air duct and discharged through the closed annular air duct. The present invention adopts a switch device arranged at the radial air inlet, which can open and close the radial air inlet, realize switching between cold air and warm air, avoid the phenomenon of mixing cold air when warm air is used, and enhance the user's body feeling.

Description

Technical Field

[0001] The invention relates to the technical field of air conditioning, and in particular to a cooling and heating circulation fan with variable air duct. Background Art

[0002] Heaters or fans are essential electrical appliances for modern families. Currently, there are either single heaters or single fans on the market, and there are very few products that can truly combine the functions of heater heating and fan blowing, especially cold and warm circulation fans. Cold and warm circulation fans can be used as both heaters and fans, taking into account both cold and warm functions, achieving multiple uses of one machine. Due to the fixed product structure of cold and warm circulation fans, the axial flow fan blades intake air synchronously in both radial and axial directions, and the air intake volume is large. When warm air is needed, the hot air blown out is also mixed with cold air, especially around the entire air outlet network, and the physical sensation is not very ideal.

[0003] For example, Chinese patent document CN 206903897 discloses a natural wind / warm wind dual-purpose electric circulation fan. When used as a heater, the radial air intake does not pass through the heating element. Therefore, the hot air blown out is obviously mixed with cold air, and the wind force is strong, which gives the user an unsatisfactory feeling. In order to improve the heating problem existing in the axial flow fan in the cold and warm circulation fan, it is urgent to optimize the structure of the existing cold and warm circulation fan to meet people's comfort when heating without affecting the cold air volume. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problem that the existing axial flow heating and cooling circulation fans have a large heating air volume and are mixed with unheated cold air, resulting in unsatisfactory body perception effects. To this end, the present invention provides a duct-variable heating and cooling circulation fan, which can not only adjust the cold air volume, but also greatly improve the heating body perception effect.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] A duct-variable cooling and heating circulation fan comprises a rear mesh cover, an axial wind channel, a heating component and a fan blade. Both ends of the axial wind channel are open and connected to the rear mesh cover. The heating component is arranged in the axial wind channel. The fan blade is located outside the air outlet end of the axial wind channel. The rear mesh cover between the air outlet end of the axial wind channel and the fan blade is also provided with a radial air inlet. A closed annular air channel is formed on the rear mesh cover at the front end of the fan blade. The rear mesh cover is also provided with a switch device for controlling the opening and closing of the radial air inlet. When the switch device is controlled to make the radial air inlet in an open state, external air enters through the radial air inlet to form radial wind, and is mixed with the axial wind generated in the axial wind channel and then discharged through the closed annular air channel.

[0007] The axial wind channel is a closed wind duct arranged on the rear mesh cover, which is a part of the rear mesh cover or a closed cylinder arranged on the inner side or outer side of the rear mesh cover.

[0008] Preferably, the switch device is a wind shield arranged on the outer side of the rear mesh cover, and one or more wind shields are arranged along the outer circumferential direction of the radial air inlet. One end of each wind shield is rotatably hinged with the rear mesh cover through a hinge mechanism, and the other end is provided with a buckle that can be snap-fitted and fixed with the rear mesh cover; when the wind shield rotates in a direction away from the radial air inlet, the wind shield opens the radial air inlet, and when the wind shield rotates in the opposite direction to the radial air inlet and fits with the rear mesh cover, the wind shield closes the radial air inlet and is snap-fitted and fixed with the rear mesh cover through the buckle.

[0009] Or preferably, a plurality of radial air inlets are provided along the circumferential direction of the rear mesh cover and are arranged parallel to the axial direction of the fan blades, and the switch device is a plurality of wind shields arranged on the outside of each radial air inlet and parallel to the axial direction of the fan blades, and both ends of each wind shield are respectively provided with a rotating shaft and a limiting shaft extending along its length direction, and an annular front support plate and a rear support plate are respectively provided at both ends of the radial air inlet, and a plurality of positioning holes and limiting long holes corresponding to the axial direction are respectively provided along the circumferential directions of the front support plate and the rear support plate, and the rotating shafts and limiting shafts at both ends of the wind shield are respectively placed in the positioning holes and limiting long holes corresponding to the front support plate and the rear support plate, and the wind shield takes the center of the positioning hole as the axis, and the limiting shaft rotates along the limiting long hole; when the wind shield rotates along the limiting long hole to a radial position, the radial air inlet is opened, and when the wind shield rotates to a position that fits with the adjacent wind shield, the radial air inlet is closed.

[0010] The radial air inlet is arranged on the rear mesh cover in a 360-degree surrounding manner, and is composed of multiple rows of partition bars axially arranged on the rear mesh cover, and the radial air inlet is formed between two adjacent partition bars; the positioning holes on the front support plate and the rear support plate are arranged corresponding to the partition bars in the same radial direction of the rear mesh cover, and the radial air inlet gap formed when two adjacent wind shields are opened corresponds one to one to the radial air inlet formed between the two adjacent partition bars.

[0011] A swing ring is also provided on the closed annular air duct located on the outer side of the front support plate, and a plurality of swing limit long holes corresponding to the positions of the limit long holes are provided along the circumferential direction of the swing ring, and the limit shaft at one end of the wind shield plate sequentially passes through the limit long hole on the front support plate and the swing limit long hole on the swing ring; an annular groove is also provided on the outer circumferential surface of the closed annular air duct, and the swing ring is rotatably arranged in the annular groove, and the rotation direction of the swing limit long hole on the swing ring is opposite to that of the limit long hole on the front support plate.

[0012] Or preferably, a plurality of the radial air inlets are provided along the circumferential direction of the rear mesh cover, the switch device is an annular wind shield ring arranged on the inner side or the outer side of the rear mesh cover, the axial dimension of the annular wind shield ring is greater than or equal to the axial dimension of the radial air inlet, and the annular wind shield ring can be axially moved into and out of the radial air inlet position to control the opening or closing of the radial air inlet.

[0013] The annular wind shielding ring is a cylindrical annular shell that fits the outer side surface of the rear mesh cover, and the annular wind shielding ring and the rear mesh cover are slidably connected in the axial direction.

[0014] Or preferably, a plurality of radial air inlets are provided along the circumferential direction of the rear mesh cover and are arranged parallel to the axial direction of the fan blades, and the switching device is a cylindrical wind shield ring arranged on the outside of the radial air inlets, the wind shield ring is in contact with the outer circumferential surface of the rear mesh cover and can rotate along the circumferential surface of the rear mesh cover; the wind shield ring is a grille structure, and a plurality of axially arranged bars are provided on it; when the bars on the wind shield ring rotate to the radial air inlets, the radial air inlets are closed, and when the bars on the wind shield ring rotate to the partition bar position between two adjacent radial air inlets, the radial air inlets are opened.

[0015] The radial air inlets are arranged at equal intervals in the circumferential direction, the bars on the wind shield ring are arranged at equal intervals in the circumferential direction, the center distance between two adjacent bars is equal to the center distance between two adjacent radial air inlets, and the length and width of the bars are greater than the length and width of the radial air inlets.

[0016] The wind shield ring is placed on the outer side surface of the radial air inlet, and the connecting end between the closed annular air duct and the radial air inlet is provided with a connecting structure for rotating and positioning the wind shield ring; the connecting structure includes an annular groove arranged on the closed annular air duct and a positioning protrusion arranged on the inner side surface of the wind shield ring, the positioning protrusion is placed in the annular groove, and when the wind shield ring rotates, the positioning protrusion is slidably connected to the annular groove.

[0017] The technical solution of the present invention has the following advantages:

[0018] A. The present invention sets a switch device for controlling the opening and closing of the radial air inlet at the radial air inlet position of the rear mesh cover, so as to realize switching between cold air and warm air, and can completely avoid the phenomenon of cold air being mixed in warm air, and effectively improve the user's body feeling; at the same time, when the cold air is used, the switch device can also be used to adjust the size of the radial air inlet, and the total amount of air output can be controlled by adjusting the radial cold air intake volume, so as to provide a stronger user experience.

[0019] B. The switch device used in the present invention can be a windshield plate fixed on a hinge for rotation, a shutter-type windshield sheet, an annular windshield ring that can move axially along the inner or outer side of the hood, and a windshield ring that can rotate in the circumferential direction of the hood. All of them control the amount of cold air by blocking or opening the air inlet channel of the radial air inlet, and are easy to operate.

[0020] C. The present invention establishes a tapered axial ventilation duct to effectively collect surrounding air to form an intake airflow, and blows it out in a concentrated and uniform manner, which provides a stronger blowing feeling. It also has a simple structure and a novel structural form, and can well regulate the radial air intake volume without reducing the air intake volume of the axial ventilation duct, so that users can have a softer heating experience. In addition to fully optimizing the performance of the product in the warm air state, it also allows the environment within a certain spatial range to heat up quickly, shortening the heating time, so that users can get warmth in the shortest time and have a more comfortable experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for use in the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1-1 is a cross-sectional view of the cooling and heating circulation fan provided in Example 1 of the present invention (in an open state);

[0023] Figure 1-2 is a cross-sectional view of the cooling and heating circulation fan provided in Example 1 of the present invention (closed state);

[0024] Figure 2-1 This is a schematic diagram of an exploded view of a cooling and heating circulation fan cover provided in Embodiment 2 of the present invention;

[0025] Figure 2-2 is a cross-sectional schematic diagram of a cooling and heating circulation fan provided in Embodiment 2 of the present invention;

[0026] Figure 2-3 is a cross-sectional view of the cooling and heating circulation fan provided in Example 2 of the present invention (in an open state);

[0027] Figure 2-4 is a cross-sectional view of the cooling and heating circulation fan provided in Example 2 of the present invention (closed state);

[0028] Figure 3-1 is a cross-sectional view of the cooling and heating circulation fan provided in Example 3 of the present invention (in an open state);

[0029] Figure 3-2 is a cross-sectional view of the cooling and heating circulation fan provided in Example 3 of the present invention (closed state);

[0030] Figure 4-1 : is an exploded schematic diagram of a cooling and heating circulation fan cover provided in Embodiment 4 of the present invention;

[0031] Figure 4-2 is a cross-sectional view of a cooling and heating circulation fan provided in Example 4 of the present invention;

[0032] Figure 4-3 is a cross-sectional view of the cooling and heating circulation fan provided in Example 4 of the present invention (in an open state);

[0033] Figure 4-4 is a cross-sectional view of the cooling and heating circulation fan provided in Example 4 of the present invention (closed state);

[0034] Figure 5-1 is a three-dimensional diagram of a cooling and heating circulation fan provided in Embodiment 5 of the present invention;

[0035] Figure 5-2 is a cross-sectional view of the cooling and heating circulation fan provided in Example 5 of the present invention (in an open state);

[0036] Figure 5-3 It is a cross-sectional view of the cooling and heating circulation fan provided in Example 5 of the present invention (closed state).

[0037] The following are marked in the figure:

[0038] 1-Body

[0039] 11-Rear grille

[0040] 111- radial air inlet, 1111- partition bar, 112- closed annular air duct, 1121- annular groove, 113- air inlet grille

[0041] 12-drive device, 121-motor, 122-motor cover

[0042] 13-Heating components

[0043] 14- Wind blade

[0044] 15-Switch device

[0045] 15a- wind deflector, 15a1- hinge mechanism, 15a2- buckle

[0046] 15b- windshield, 15b1- rotating shaft, 15b2- limiting shaft

[0047] 16b1-front support plate, 16b2-rear support plate

[0048] 17b-swing ring, 17b1-toggle handle

[0049] 15c-Ring wind shield

[0050] 15d- Wind shield ring

[0051] 15d1-grid, 15d2-connection structure

[0052] 15d21-annular groove, 15d22-positioning protrusion

[0053] 18-axial wind channel, 19-front net; 20-lever;

[0054] a-positioning hole, b-limiting long hole, c-radial air inlet gap, d-swinging limiting long hole, e-dial hole;

[0055] 2- Base. DETAILED DESCRIPTION

[0056] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] The present invention provides a variable air duct cooling and heating circulation fan, which generally comprises a fuselage 1 and a base 2, wherein the fuselage 1 comprises a rear mesh cover 11, a driving device 12, a heating component 13, a fan blade 14, an axial wind channel 18 and a front net 19, wherein the fan blade 14, the driving device 12 and the heating component 13 are arranged in the rear mesh cover 11, and the rotating shaft of the driving device 12 passes through the heating component 13 and is connected to the fan blade 14; the front end of the fan blade 14 forms a section of a closed annular air duct 112, where the closed annular air duct 112 refers to a cylindrical shell surrounded by a plate without holes. A detachable fixed connection is formed between the front net 19 and the closed annular air duct 112, which has the functions of safety protection and air outlet; the rear mesh cover 11 is a grid-like structure, and a closed air inlet grille 113 is formed at its rear end, and a motor 121 is installed at the bottom of the inner cavity of the rear mesh cover 11, and the motor cover 122 covers the motor 121 and is fixed to the rear mesh cover 11. The closed annular air duct 112 is coaxially connected to the radial air inlet duct 111. The two ends of the axial air duct 18 are open and connected to the rear mesh cover 11. The heating component 13 is arranged in the axial air duct 18. The fan blades 14 are located outside the air outlet end of the axial air duct 18. The rear mesh cover 11 located between the air outlet end of the axial air duct 18 and the fan blades 14 is also provided with a radial air inlet 111. The rear mesh cover 11 is also provided with a switch device 15 for controlling the opening and closing of the radial air inlet 111. When the switch device 15 is controlled to open the radial air inlet 111, external air enters through the radial air inlet 111 to form radial wind, and is mixed with the axial wind generated in the axial air duct 18 and discharged through the closed annular air duct 112.

[0058] Figure 1-1 to Figure 4-4 In the structure shown, the axial wind channel 18 is a closed cylindrical structure arranged on the inner side of the rear mesh cover 11. Of course, it can also be arranged on the outer side of the rear mesh cover 11 (not shown in the figure). The rear mesh cover is a structure with holes or grids, and the axial wind channel is formed by a section of the axial wind channel 18; of course, it can also be a part of the rear mesh cover, that is, a closed wind channel is formed on the rear mesh cover 11, and the heating component 13 is located here, as shown in the figure. Figure 5-1 shown.

[0059] The inner side of the axial wind channel 18 is a conical wind channel. In the direction toward the fan blades 14, the ventilation cross-sectional size of the axial wind channel 18 gradually decreases, which can well collect the surrounding air to form airflow, and the blowing experience is stronger.

[0060] When heating is needed, the switch device 15 only needs to be controlled to close the radial air inlet 111 to block the entry of radial wind. The axial wind generated by the rotation of the fan blades 14 enters through the air inlet grille 113 at the rear end of the rear mesh cover 11 and passes through the heating component 13, so that there will be no cold wind in the blown warm air. Of course, when warm air is not needed, the size of the radial air inlet 11 can be adjusted according to the specific situation, and the radial air inlet can be fully opened or partially opened to adjust the air intake according to personal preference.

[0061] The heating component 13 is connected to the inner side 18 of the axial wind channel, so that the wind generated by the fan blade 14 passes through the air inlet grille 113, the axial ventilation channel 18, the heating component 13, and enters the closed annular wind channel 112 for discharge. The heating component 13 here adopts the existing technology, and its structural features are not described here.

[0062] The motor 121 and the shaft, the front net 19, the rear net cover 11, and the fan blades 14 in the present invention are arranged along a central axis; in particular, the rear net cover 11 and the heating component 13, and the closed annular air duct 112 are arranged along a central axis.

[0063] Example 1

[0064] like Figure 1-1 and Figure 1-2 As shown, the switch device 15 adopted in this embodiment is a windshield 15a arranged on the outer side of the rear mesh cover 11, and one or more windshields 15a are arranged along the outer circumferential direction of the radial air inlet 111. One end of each windshield 15a is rotatably hinged with the rear mesh cover 11 through a hinge mechanism 15a1, and the other end is provided with a buckle 15a2 that can be snap-fitted and fixed with the rear mesh cover 11; when the windshield 15a rotates in the direction away from the radial air inlet 111, the windshield 15a opens the radial air inlet 111, and when the windshield 15a rotates in the opposite direction to the radial air inlet 111 and fits with the rear mesh cover 11, the windshield 15a closes the radial air inlet 111 and is snap-fitted and fixed with the rear mesh cover 11 through the buckle.

[0065] Here, the hinge mechanism is disposed at one end of the radial air inlet 111, and the wind shield 15a controls the opening and closing of the radial air inlet 111 by rotating at one end of the radial air inlet 111. Figure 1-1 As shown, the windshield 15a is rotated and positioned by a hinge mechanism. The hinge mechanism here is a prior art, with a pin shaft penetrating through a positioning hole on a fixed block, and the pin shaft and the positioning hole can be interference fit with each other, or can rely on a torsion spring or the like to assist in the angle positioning and feel of opening the windshield, which is not specifically limited in the present invention.

[0066] The windshields 15a in the present invention are arranged along the circumference of the radial air inlet 111, and each windshield 15a is rotatably hinged with the rear mesh cover 11 through a hinge mechanism. According to actual conditions, at least two windshields 15a can be arranged in the circumferential direction, and all windshields 15a can be assembled into a complete circular surface along the circumferential direction of the radial air inlet 111. The windshields 15a in the present invention are equally divided into four pieces in the circumferential direction, and each windshield 15a can be independently opened and controlled. Figure 1-1 As shown, the four windshields 15a are in a fully open state, or only one windshield 15a above the rear mesh cover can be opened. At this time, the radial wind generated by the rotation of the blades 14 will only enter from the top, and then mix with the generated axial wind and be discharged from the front mesh 19 together.

[0067] Example 2

[0068] The difference from Example 1 is that: Figure 2-1 and 2-2 As shown, a plurality of radial air inlets 111 are arranged along the circumferential direction of the rear mesh cover 11 and are arranged parallel to the axial direction of the fan blade 14. The switch device 15 is a plurality of wind shields 15b arranged outside each radial air inlet 111 and arranged parallel to the axial direction of the fan blade 14. The two ends of each wind shield 15b are respectively provided with a rotating shaft 15b1 and a limiting shaft 15b2 extending along the length direction thereof. The two ends of the radial air inlet 111 are respectively provided with an annular front support plate 16b1 and a rear support plate 16b2. A plurality of wind shields 15b are respectively provided along the circumferential direction of the front support plate 16b1 and the rear support plate 16b2 in the axial direction. Multiple positioning holes a and limiting long holes b are arranged in a one-to-one correspondence, and the limiting long holes b are in an arc shape. The rotating shaft 15b1 and the limiting shaft 15b2 at both ends of the wind shield 15b are respectively placed in the positioning hole a and the limiting long hole b corresponding to the front support plate 16b1 and the rear support plate 16b2, and the wind shield 15b takes the center of the positioning hole a as the axis, and the limiting shaft 15b2 rotates along the limiting long hole b; when the wind shield 15b rotates to a radial position along the limiting long hole b, the radial air inlet 111 is opened, and when the wind shield 15b rotates to a position that fits with the adjacent wind shield 15b, the radial air inlet 111 is closed. The structure of the wind shield 15b here is a rectangular plate, and a rotating shaft 15b1 and a limiting shaft 15b2 are respectively arranged at both ends of the rectangular plate. The limiting shaft 15b2 is located above the rotating shaft 15b1, and the rotating shaft 15b1 and the limiting shaft 15b2 at the other end of the wind shield 15b are placed in the positioning hole a and the limiting long hole b of the rear support plate 16b2. The positioning hole a and the limiting long hole b on the front support plate 16b1 are coaxially arranged with the positioning hole a and the limiting long hole b on the rear support plate 16b2.

[0069] Preferably, the radial air inlet 111 is arranged on the rear mesh cover 11 in a 360-degree surround. Of course, the radial air inlet 111 can also be arranged at a local position of the rear mesh cover. It is composed of multiple rows of partition bars 1111 axially arranged on the rear mesh cover 11, and the radial air inlet 111 is formed between two adjacent partition bars 1111; the positioning holes a on the front support plate 16b1 and the rear support plate 16b2 are corresponding to the partition bars 1111 and are arranged in the same radial direction of the rear mesh cover 11; the radial air inlet gap c formed when two adjacent wind shields 15b are opened corresponds one to one to the radial air inlet 111 formed between two adjacent partition bars 1111.

[0070] In order to facilitate the synchronous control of multiple wind shields 15b and realize uniform synchronous air intake in the circumferential direction, a swing ring 17b is also provided on the closed annular air duct 112 located on the outer side of the front support plate 16b1, and a plurality of swing limit long holes d corresponding to the positions of the arc-shaped limit long holes b are provided along the circumferential direction of the swing ring 17b, and the limit shaft 15b2 at one end of the wind shield 15b passes through the limit long hole b on the front support plate 16b1 and the swing limit long hole d on the swing ring 17b in sequence; an annular groove 1121 is also provided on the outer circumferential surface of the closed annular air duct 112, and the swing ring 17b is rotatably arranged in the annular groove 1121, and the rotation direction of the swing limit long hole d on the swing ring 17b is opposite to the rotation direction of the limit long hole b on the front support plate 16b1.

[0071] Figure 2-1 Preferably, the swing ring 17b is an annular sheet component, which also has swing limit long holes d corresponding to the number and corresponding positions of the limit long holes b; the number of swing limit long holes d depends on the number of swing trajectory lines, and the present invention does not specifically limit it.

[0072] In order to assist in moving the swing ring 17b, Figure 2-1 As shown, the present invention also provides a toggle handle 17b1 on the swing ring 17b. Of course, an automatic toggle mode can also be adopted, which requires the swing ring to synchronously drive the wind shield to swing, so as to close and open the radial air inlet channel. The most basic automatic driving mode can be composed of a transmission structure and a motor drive, such as driving the swing ring 17b to rotate left and right through an electric push rod. It will not be described in detail here, but only as another embodiment of its driving mode.

[0073] When warm air is needed, the swing ring 17b is manually moved along the circumference, and the swing ring 17b drives the wind shield plate group to swing, closing the radial air inlet 111, such as Figure 2-4 As shown, the air intake of the air inlet can be reduced; only axial air intake can make the wind coming out of the front net 19 warmer and make the warm air more uniform.

[0074] like Figure 2-3As shown, when cold air is needed, the swing ring 17b is manually turned in the reverse direction of the circle, and the swing ring 17b drives the wind shield group to swing, and the radial air inlet 111 is opened, and radial and axial two-way air intake can be used to increase the air inlet channel and air intake volume, so that the air volume coming out of the front net 19 is larger and cooler.

[0075] Example 3

[0076] The difference from the above-mentioned embodiment 1 and embodiment 2 is that: Figure 3-1 and Figure 3-2 As shown, in this embodiment, a plurality of radial air inlets 111 are provided along the circumferential direction of the rear mesh cover 11, and the switch device 15 is an annular wind shielding ring 15c provided on the inner side or the outer side of the rear mesh cover 11, and the axial dimension of the annular wind shielding ring 15c is greater than or equal to the axial dimension of the radial air inlet 111, and the annular wind shielding ring 15c can be axially moved into and out of the radial air inlet 111 to control the opening or closing of the radial air inlet 111. Preferably, the annular wind shielding ring 15c is a cylindrical annular shell that fits the outer side of the rear mesh cover 11, and the annular wind shielding ring 15c is axially slidably connected to the rear mesh cover 11.

[0077] Taking the annular wind shielding ring 15c disposed on the inner side of the rear mesh cover 11 as an example for explanation, the present invention further provides a toggle handle (not shown in the figure) on the annular wind shielding ring 15c, the toggle handle radially penetrates the rear mesh cover and extends out of the outer side of the rear mesh cover 11; the annular wind shielding ring 15c is moved along the inner side of the rear mesh cover by axially toggling the toggle handle, so that the annular wind shielding ring 15c gradually closes or opens the radial air inlet channel 111 on the rear mesh cover 11. The toggle handle can be one or more, which is not limited here.

[0078] When you need to use warm air, Figure 3-2 , manually turn the annular wind shield ring 15c to close the radial air inlet 111, so as to reduce the air inlet area and air inlet volume, and only realize axial air inlet, so as to make the air coming out of the front net 19 warmer and more uniform;

[0079] like Figure 3-1 As shown, when cold air is needed, the annular wind shielding ring 15c is manually turned to open the radial air inlet 111, so as to achieve radial and axial two-way air intake at the same time, thereby increasing the air intake area and air intake volume; and making the air volume coming out of the front net 19 larger and cooler.

[0080] Example 4

[0081] The difference from the above embodiments is that: Figure 4-1 and Figure 4-2As shown, in this embodiment, a plurality of radial air inlets 111 are provided along the circumferential direction of the rear mesh cover 11 and are arranged parallel to the axial direction of the fan blades 14. The switch device 15 is a cylindrical wind shield ring 15d arranged on the outside of the radial air inlet 111. The wind shield ring 15d is in contact with the outer circumferential surface of the rear mesh cover 11 and can rotate along the circumferential surface of the rear mesh cover 11; the wind shield ring 15d is a grille structure, and a plurality of axially arranged bars 15d1 are provided on it; when the bars 15d1 on the wind shield ring 15d rotate to the radial air inlet 111, the radial air inlet 111 is closed, and when the bars 15d1 on the wind shield ring 15d rotate to the position of the partition bars 1111 between two adjacent radial air inlets 111, the radial air inlet 111 is opened.

[0082] Preferably, the radial air inlets 111 are arranged at equal intervals in the circumferential direction, the bars 15d1 on the wind shield ring 15d are arranged at equal intervals in the circumferential direction, the center distance between two adjacent bars 15d1 is equal to the center distance between two adjacent radial air inlets 111, and the length and width of the bars 15d1 are greater than the length and width of the radial air inlets 111.

[0083] The wind shield ring 15d is sleeved on the outer side surface of the radial air inlet 111, and the connecting end between the closed annular air duct 112 and the radial air inlet 111 is provided with a connecting structure 15d2 for rotating and positioning the wind shield ring 15d; the connecting structure 15d2 includes an annular groove 15d21 arranged on the closed annular air duct 112 and a positioning protrusion 15d22 arranged on the inner side surface of the wind shield ring 15d, and the positioning protrusion 15d22 is placed in the annular groove 15d21. When the wind shield ring 15d rotates, the positioning protrusion 15d22 is slidingly connected with the annular groove 15d21.

[0084] The wind shield ring 15d can be driven to rotate manually or automatically. The automatic method can basically be composed of a transmission structure and a motor drive, which is not described in detail in the present invention. Manual is only one embodiment of its driving method.

[0085] When you need to use warm air, Figure 4-4 As shown, manually rotating the wind shield ring 15d and closing the radial air inlet 111 can reduce the air inlet area and air inlet volume; only axial air inlet can make the wind coming out of the front net 19 warmer and make the warm air more uniform.

[0086] When cold air is needed, Figure 4-3 As shown, manually rotate the wind shield ring 15d and open the radial air inlet 111, so that air can enter in both radial and axial directions, thereby increasing the air intake area and air intake volume; making the air volume coming out of the front net 19 larger and cooler.

[0087] The radial air inlet 111 here is a plurality of rows of grilles or a plurality of exhaust holes axially arranged on the rear mesh cover 11, and the mesh size of the ventilation structure of the rear mesh cover 11 is not specifically limited here.

[0088] The outer side surface of the rear mesh cover 11 is rotatably connected to the base 2. The structure of the base 2 will not be described here in detail, as it is a prior art.

[0089] Example 5

[0090] Different from the above embodiments, the axial ventilation passage 18 used in this embodiment is located at a different position. Figure 5-1 As shown, the axial ventilation passage 18 in this embodiment is a part of the rear mesh cover 11, and a closed structure in the circumferential direction is formed on the rear mesh cover 11 as the axial ventilation passage 18. An annular wind shielding ring 15c is provided on the inner side of the axial ventilation passage 18, and a shifting hole e extending along the axial direction is formed on the axial ventilation passage 18. A shifting rod 20 is fixed on the annular wind shielding ring 15c, and the shifting rod 20 extends from the shifting hole e. The shifting rod 20 is shifted forward and backward to make the annular wind shielding ring slide forward and backward along the axial direction.

[0091] When you need to use warm air, Figure 5-3 As shown, manually move the lever 20 to make the annular wind shield ring 15c extend axially from the inner side of the axial ventilation duct, closing the radial air inlet 111, thereby reducing the air inlet area and air inlet volume; only axial air inlet can make the wind coming out of the front net warmer and make the warm air more uniform.

[0092] When cold air is needed, Figure 5-2 As shown, manually move the lever 20 to retract the annular wind shield ring 15c toward the inner side of the axial ventilation duct, open the radial air inlet 111, and allow air to enter in both radial and axial directions, thereby increasing the air intake area and air volume; making the air volume coming out of the front net larger and cooler. The axial ventilation duct here can be a cylindrical, polygonal, or nearly circular annular channel. The switch device shown in Examples 1-4 can also be used on the basis of the axial ventilation duct shown in Example 5, which will not be described in detail here.

[0093] As described above, the process of opening and closing the radial air inlet channel is the two most basic states of the implementation of the present invention; of course, the state of adjusting the radial air inlet size can be arbitrarily selected in real time between these two states; the size of the opening and closing of the radial air inlet channel depends on the actual needs of the product design; the manual and automatic opening and closing methods also depend on the positioning of the product, which is not limited or summarized here in the present invention.

[0094] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or modifications derived therefrom are still within the scope of protection of the present invention.

Claims

1. A variable air duct cooling and heating circulation fan, comprising a rear mesh cover (11), an axial air duct (18), a heating component (13) and a fan blade (14), wherein both ends of the axial air duct (18) are open and connected to the rear mesh cover (11), the heating component (13) is arranged in the axial air duct (18), the fan blade (14) is located outside the air outlet end of the axial air duct (18), the rear mesh cover (11) located between the air outlet end of the axial air duct (18) and the fan blade (14) is further provided with a radial air inlet (111), and a closed annular air duct (112) is formed on the rear mesh cover (11) located at the front end of the fan blade (14), characterized in that: The rear mesh cover (11) is also provided with a switch device (15) for controlling the opening and closing of the radial air inlet (111); when the switch device (15) is controlled so that the radial air inlet (111) is in an open state, external air enters through the radial air inlet (111) to form radial wind, and is mixed with the axial wind generated in the axial wind channel (18) and then discharged through the closed annular air channel (112); The axial wind channel (18) is a section of a closed wind channel arranged on the rear mesh cover (11), which is a part of the rear mesh cover (11) or a closed cylinder arranged on the inner side or outer side of the rear mesh cover (11); The switch device (15) is a windshield (15a) arranged on the outer side of the rear mesh cover (11), and one or more windshields (15a) are arranged along the outer circumferential direction of the radial air inlet (111). One end of each windshield (15a) is rotatably hinged with the rear mesh cover (11) through a hinge mechanism (15a1), and the other end is provided with a buckle (15a2) that can be snap-fitted and fixed with the rear mesh cover (11); when the windshield (15a) rotates in a direction away from the radial air inlet (111), the windshield (15a) opens the radial air inlet (111); when the windshield (15a) rotates in the opposite direction to the radial air inlet (111) and fits with the rear mesh cover (11), the windshield (15a) closes the radial air inlet (111) and is snap-fitted and fixed with the rear mesh cover (11) through the buckle; A plurality of radial air inlets (111) are arranged along the circumferential direction of the rear mesh cover (11) and are arranged in parallel with the axial direction of the fan blade (14); the switch device (15) is a plurality of wind shields (15b) arranged on the outside of each radial air inlet (111) and in parallel with the axial direction of the fan blade (14); a rotating shaft (15b1) and a limiting shaft (15b2) extending along the length direction of each wind shield (15b) are respectively arranged at both ends of the radial air inlet (111); a ring-shaped front support plate (16b1) and a rear support plate (16b2) are respectively arranged along the circumferential direction of the front support plate (16b1) and the rear support plate (16b2) in the axial direction. A plurality of positioning holes (a) and limiting long holes (b) should be provided, and the rotating shaft (15b1) and the limiting shaft (15b2) at both ends of the wind shield (15b) are respectively placed in the positioning hole (a) and the limiting long hole (b) corresponding to the front support plate (16b1) and the rear support plate (16b2), and the wind shield (15b) takes the center of the positioning hole (a) as the axis, and the limiting shaft (15b2) rotates along the limiting long hole (b); when the wind shield (15b) rotates along the limiting long hole (b) to a radial position, the radial air inlet (111) is opened, and when the wind shield (15b) rotates to a position where it fits with the adjacent wind shield (15b), the radial air inlet (111) is closed.

2. The variable air duct cooling and heating circulation fan according to claim 1, characterized in that: The radial air inlet (111) is arranged on the rear mesh cover (11) in a 360-degree circumferential manner, and is composed of a plurality of rows of partition bars (1111) axially arranged on the rear mesh cover (11), and the radial air inlet (111) is formed between two adjacent partition bars (1111); the positioning holes (a) on the front support plate (16b1) and the rear support plate (16b2) are arranged correspondingly to the partition bars (1111) in the same radial direction of the rear mesh cover (11), and the radial air inlet gap (c) formed when two adjacent windshields (15b) are opened corresponds one to one to the radial air inlet (111) formed between the two adjacent partition bars (1111).

3. The variable air duct cooling and heating circulation fan according to claim 2, characterized in that: The enclosed annular air duct (112) located outside the front support plate (16b1) is also provided with a swing ring (17b), and a plurality of arc-shaped swing limit long holes (d) corresponding to the positions of the limit long holes (b) are provided along the circumferential direction of the swing ring (17b), and the limit shaft (15b2) at one end of the wind shield (15b) sequentially passes through the limit long hole (b) on the front support plate (16b1) and the swing limit long hole (d) on the swing ring (17b); an annular groove (1121) is also provided on the outer circumferential surface of the enclosed annular air duct (112), and the swing ring (17b) is rotatably arranged in the annular groove (1121), and the rotation direction of the swing limit long hole (d) on the swing ring (17b) is opposite to the rotation direction of the limit long hole (b) on the front support plate (16b1).

4. The variable air duct cooling and heating circulation fan according to claim 1, characterized in that: A plurality of radial air inlets (111) are arranged along the circumferential direction of the rear mesh cover (11); the switch device (15) is an annular wind shielding ring (15c) arranged on the inner side or the outer side of the rear mesh cover (11); the axial dimension of the annular wind shielding ring (15c) is greater than or equal to the axial dimension of the radial air inlet (111); the annular wind shielding ring (15c) can be axially moved into or out of the position of the radial air inlet (111) to control the opening or closing of the radial air inlet (111).

5. The variable air duct cooling and heating circulation fan according to claim 4, characterized in that: The annular wind shielding ring (15c) is a cylindrical annular shell that fits the outer side surface of the rear mesh cover (11). The annular wind shielding ring (15c) and the rear mesh cover (11) are slidably connected in the axial direction.

6. The variable air duct cooling and heating circulation fan according to claim 1, characterized in that: A plurality of radial air inlets (111) are arranged along the circumferential direction of the rear mesh cover (11) and are arranged in parallel with the axial direction of the fan blades (14); the switch device (15) is a cylindrical wind shield ring (15d) arranged outside the radial air inlets (111); the wind shield ring (15d) is fitted with the outer circumferential surface of the rear mesh cover (11) and can rotate along the circumferential surface of the rear mesh cover (11); the wind shield ring (15d) ) is a grille structure, on which are provided a plurality of axially arranged grille bars (15d1); when the grille bars (15d1) on the wind shield ring (15d) rotate to the radial air inlet (111), the radial air inlet (111) is closed; when the grille bars (15d1) on the wind shield ring (15d) rotate to the position of the partition bars (1111) between two adjacent radial air inlets (111), the radial air inlet (111) is opened.

7. The variable air duct cooling and heating circulation fan according to claim 6, characterized in that: The radial air inlets (111) are arranged at equal intervals in the circumferential direction, the bars (15d1) on the wind shielding ring (15d) are arranged at equal intervals in the circumferential direction, the center distance between two adjacent bars (15d1) is equal to the center distance between two adjacent radial air inlets (111), and the length and width of the bars (15d1) are greater than the length and width of the radial air inlets (111).

8. The variable air duct cooling and heating circulation fan according to claim 7, characterized in that: The wind shield ring (15d) is sleeved on the outer side surface of the radial air inlet (111), and a connecting structure (15d2) for rotationally positioning the wind shield ring (15d) is provided at the connecting end between the closed annular air duct (112) and the radial air inlet (111); the connecting structure (15d2) comprises an annular groove (15d21) provided on the closed annular air duct (112) and a positioning protrusion (15d22) provided on the inner side surface of the wind shield ring (15d); the positioning protrusion (15d22) is placed in the annular groove (15d21); when the wind shield ring (15d) rotates, the positioning protrusion (15d22) is slidably connected to the annular groove (15d21).

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