A variable air duct type cold and warm circulating fan

Abstract

The present invention discloses an air duct variable cooling and heating circulation fan, which comprises a rear grille, a driving device, a heating component and a fan blade. The driving device and the heating component are arranged inside the rear grille, and the rotating shaft of the driving device passes through the heating component and then is connected to the fan blade. An annular radial air inlet channel is further arranged on the rear grille between the fan blade and the heating component. The front end of the rear grille forms a section of closed annular air duct, and the closed annular air duct is axially connected to the radial air inlet channel in the front and rear directions. An annular wind blocking ring is sleeved at the radial air inlet channel. The axial dimension of the annular wind blocking ring is greater than or equal to the axial dimension of the radial air inlet channel. The annular wind blocking ring can axially move into and out of the position of the radial air inlet channel to control the opening and closing of the radial air inlet channel. The setting of the annular wind blocking ring in the present invention enables the annular wind blocking ring to open and close the radial air inlet channel, switch between cold air and warm air for use, avoid the phenomenon of cold air mixing in when using warm air, and enhance the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and particularly to a variable-air-duct cold and warm circulating fan. Background Art

[0002] Heaters or fans are essential household appliances in modern families. Currently, on the market, there are either single heaters or single fans, and there are very few products that can combine the functions of a heater for heating and a fan for blowing air, especially cold and warm circulating fans. A cold and warm circulating fan can be used as a heater or a fan, taking into account both cold and warm, achieving multi-functional use of one machine. Due to the fixed product structure of the cold and warm circulating fan, the axial-flow fan blades intake air simultaneously in both the radial and axial directions, with a large intake air volume. When warm air needs to be blown out, the hot air blown out is still mixed with cold air, especially around the entire air outlet net, and the body feeling is not very satisfactory.

[0003] For example, a natural wind / warm wind dual-purpose electric circulating fan disclosed in Chinese Patent Document CN 206903897, when used as a heater, the radial intake air does not pass through the heating element. Therefore, the hot air blown out is significantly mixed with cold air, and the wind force is strong, resulting in an unsatisfactory body feeling for users. In order to improve the heating problem existing in the axial-flow fan blades in the cold and warm circulating fan, it is urgent to optimize the structure of the existing cold and warm circulating fan to meet the comfort of people 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 cold and warm circulating fan has a large heating air volume and is mixed with unheated cold air, resulting in an unsatisfactory body feeling effect. For this reason, the present invention provides a variable-air-duct cold and warm circulating fan, which can not only adjust the cold air volume but also greatly improve the heating body feeling effect.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A variable-air-duct cold and warm circulating fan, comprising a rear grille, a driving device, a heating component and a fan blade. The driving device and the heating component are arranged inside the rear grille, and the rotating shaft of the driving device passes through the heating component and is connected to the fan blade. An annular radial air intake passage is further provided on the rear grille between the fan blade and the heating component. A section of closed annular air duct is formed at the front end of the rear grille, and the closed annular air duct is connected to the radial air intake passage. It is characterized in that an annular wind blocking ring is further provided at the radial air intake passage, the axial dimension of the annular wind blocking ring is greater than or equal to the axial dimension of the radial air intake passage, and the annular wind blocking ring can axially move into and out of the position of the radial air intake passage to control the opening and closing of the radial air intake passage.

[0007] Furthermore, the annular wind shielding ring is a cylindrical annular shell, which is sleeved on the outer side or the inner side of the rear mesh cover, and the annular wind shielding ring and the rear mesh cover form a sliding connection in the axial direction.

[0008] The rear mesh cover is provided with an axially arranged guide groove or guide rib, and the shell of the annular wind shielding ring is provided with a corresponding guide rib or guide groove, and the annular wind shielding ring can slide axially along the rear mesh cover.

[0009] The heating component includes a heating bracket and a heating element. A circumferentially closed axial ventilation duct is formed in the heating bracket. The heating element is fixed in the axial ventilation duct of the heating bracket, and the heating bracket forms a detachable fixed connection with the rear mesh cover, so that the wind generated by the fan blade enters the closed annular air duct through the axial ventilation duct and the heating element and is discharged.

[0010] Preferably, the annular wind shield ring is arranged on the inner side of the heating bracket, and a toggle handle is provided on the annular wind shield ring, and the toggle handle radially penetrates the axial long hole arranged on the heating bracket and extends out of the outer side surface of the rear mesh cover; by axially toggling the toggle handle, the annular wind shield ring is moved along the inner side surface of the heating bracket, so that the annular wind shield ring gradually closes or opens the radial air inlet channel on the rear mesh cover.

[0011] Preferably, the axial ventilation duct is a conical duct, and the ventilation cross-sectional size of the axial ventilation duct gradually decreases in the direction toward the fan blades.

[0012] Preferably, the radial air inlet passage is a plurality of rows of grilles or a plurality of exhaust holes axially arranged on the rear grille.

[0013] A front net is also provided at the front end of the rear net cover, and a detachable fixed connection is formed between the front net and the closed annular air duct.

[0014] The cooling and heating circulation fan is also provided with a base, and the outer side surface of the rear mesh cover is rotatably connected with the base.

[0015] The technical solution of the present invention has the following advantages:

[0016] A. The present invention sets an annular wind shield ring at the position of the radial air inlet channel of the rear mesh cover. The annular wind shield ring can move along the axial direction to open and close the radial air inlet channel and switch between cold air and warm air. It 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 annular wind shield ring can also be used to adjust the size of the air inlet of the radial air inlet channel. By adjusting the radial cold air inlet volume, the total air output can be controlled, and the user experience is stronger.

[0017] B. 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, providing a stronger blowing feeling. The present invention has a simple structure and a novel structural form. The opening and closing of the radial air intake channel is controlled by the axial movement of the annular wind shield ring, and the radial air intake volume is well regulated without reducing the air intake volume of the axial ventilation duct, thereby allowing users to have a softer heating experience.

[0018] C. The present invention provides an annular wind shield ring and establishes a matching conical axial ventilation duct. In addition to fully optimizing the performance of the product in the warm air state, it also allows the environment within a certain space to heat up quickly, shortening the heating time, so that users can get warmth in the shortest time and experience more comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 It is a three-dimensional diagram of the cooling and heating circulation fan provided by the present invention;

[0021] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the fuselage disassembly;

[0022] Figure 3 yes Figure 1 A three-dimensional schematic diagram of an annular wind shield ring;

[0023] Figure 4 It is a partial cross-sectional view under radial and axial air inlet conditions (the air flow is shown after the annular wind shield ring is opened);

[0024] Figure 5 It is a partial cross-sectional view of the axial air inlet state after the radial air inlet channel is closed (the air flow is schematic after the annular wind shield ring is closed);

[0025] Figure 6 This is a schematic diagram of the cold air state when the annular wind shield ring is opened;

[0026] Figure 7 This is a simplified diagram showing the warm air status when the annular wind shield ring is closed.

[0027] The following are marked in the figure:

[0028] 1-Body

[0029] 11-Rear grille

[0030] 111 - Radial air inlet channel, 112 - Sealed annular air duct, 113 - Air inlet grille

[0031] 12 - Driving device

[0032] 121 - Motor, 122 - Motor cover

[0033] 13 - Heating component

[0034] 131 - Heating bracket, 132 - Heating element

[0035] 14 - Wind blade, 15 - Annular wind shield, 16 - Dial handle, 17 - Front net

[0036] 2 - Base.

[0037] a - Axial ventilation duct, b - Axial long hole, c - Guide groove or guide rib. Detailed implementation mode

[0038] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] Such as Figure 1 And Figure 2As shown, a variable air duct type heating and cooling circulation fan of the present invention generally includes a body 1 and a base 2. The body 1 includes a rear grille 11, a driving device 12, a heating component 13, a fan blade 14 and a front grille 17. A detachable fixed connection is formed between the front grille 17 and the closed annular air duct 112, which has the functions of safety protection and air outlet. The driving device 12 and the heating component 13 are arranged inside the rear grille 11. The rotating shaft of the driving device 12 passes through the heating component 13 and is connected to the fan blade 14. An annular radial air inlet channel 111 is also provided on the rear grille 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 grille 11. Here, the closed annular air duct 112 refers to a columnar shell surrounded by a plate without holes. The rear grille 11 is of a grid structure. An air inlet grille 113 is formed at the rear end thereof. A motor 121 is installed at the bottom of the inner cavity of the rear grille 11. The motor cover 122 covers the motor 121 and is fixed to the rear grille 11. The closed annular air duct 112 and the radial air inlet channel 111 are coaxially connected in sequence. An annular wind blocking ring 15 is also provided at the radial air inlet channel 111. The axial dimension of the annular wind blocking ring 15 is greater than or equal to the axial dimension of the radial air inlet channel 111. The annular wind blocking ring 15 can be axially moved into and out of the position of the radial air inlet channel 111. When the annular wind blocking ring 15 is completely moved into the position of the radial air inlet channel 111, it completely blocks the radial air inlet channel 111, thereby controlling the closing of the radial air inlet channel 111 and preventing external air from entering the closed annular air duct 112 through this radial air inlet channel 111. Of course, when the annular wind blocking ring 15 is moved out in the reverse direction, the radial air inlet channel 111 will be opened. Therefore, when heating is required, only need to move the annular wind blocking ring 15 to the radial air inlet channel 111 so that the annular wind blocking ring 15 completely covers the radial air inlet channel 111 to block the entry of radial wind. The axial wind generated by the rotation of the fan blade enters through the air inlet grille 113 at the rear end of the rear grille 11 and all passes through the heating component, so that there will be no cold air problem in the blown warm air. Of course, when warm air is not needed, the position of the annular wind blocking ring 15 can be adjusted according to the specific situation, and the radial air inlet channel can be completely opened or partially opened according to personal preference to adjust the air intake volume.

[0040] As Figure 3 shown, the annular wind blocking ring 15 is movably arranged at the position between the closed annular air duct 112 and the heating component 13, and its position is Figure 3The radial air inlet channel 111 therein; the size of the annular wind shield 15 is equal to the size that can enclose the radial air inlet channel 111. Here, the size includes area, diameter, dimensions, shape, etc. The purpose is to enclose the radial air inlet channel 111; the annular wind shield 15 adopted in the present invention is preferably a cylindrical annular shell, which is sleeved on the outer or inner side of the rear grille 11. The annular wind shield 15 and the rear grille 11 form a sliding connection in the axial direction. In the present invention, the annular wind shield 15 is preferably arranged on the inner side of the rear grille 11.

[0041] The rear grille 11 is provided with axially arranged guide grooves or guide ribs, and the shell of the annular wind shield 15 is provided with corresponding guide ribs or guide grooves c. After the two cooperate, the annular wind shield 15 can slide axially along the rear grille 11 to open and close the radial air inlet channel 111. Of course, the guiding features can also be arranged on the heating bracket 131 and the annular wind shield 15. There are two or more guiding features on the annular wind shield 15. The guiding features can be concave or convex; the guiding features can match the corresponding guiding features on the heating bracket 131. The specific matching cross-section and shape of the guiding features are not limited in the present invention; the guiding features are only used as a schematic in the present invention. It can also be other features or methods with guiding functions, which are not limited in the present invention; the function of guiding is only to enable the annular wind shield 15 to slide back and forth more smoothly and prevent the annular wind shield 15 from rotating along the circumferential direction.

[0042] As Figure 2 shown, the heating assembly 13 includes a heating bracket 131 and a heating element 132. A circumferentially closed axial ventilation duct a is formed inside the heating bracket 131. As Figure 6 shown, the heating element 132 is fixed in the axial ventilation duct a of the heating bracket 131, and the heating bracket 131 and the rear grille 11 form a detachable fixed connection, so that the wind generated by the fan blade 14 passes through the air inlet grille 113, enters the closed annular air duct 112 through the axial ventilation duct a and the heating element 132 and is discharged. The heating element 132 here adopts the prior art, and its structural features will not be described in detail here.

[0043] Taking the example of the annular wind shield 15 being arranged on the inner side of the heating bracket 131, the present invention also provides a toggle handle 16 on the annular wind shield 15. The toggle handle 16 is radially penetrated through the axial long hole b provided on the heating bracket 13 and extends out of the outer side of the rear mesh cover 11. By axially toggling the toggle handle 16, the annular wind shield 15 moves along the side surface of the heating bracket 131, so that the annular wind shield 15 gradually closes or opens the radial air inlet channel 111 on the rear mesh cover 11. Here, the toggle handle 16 is preferably fixed to the edge of the annular wind shield 15. The toggle handle 16 can be one or more, and there is no limitation here. The annular wind shield 15 and the toggle handle 16 can also be an integrated component, or a component composed of separate components. The present invention does not make a specific limitation here. The toggle handle 16 is only for facilitating operation when assisting the movement of the annular wind shield 15.

[0044] As Figure 6 and Figure 7 As shown, the structure of the heating bracket 131 can be clearly seen. The axial ventilation duct a formed on the inner side of the heating bracket is a conical duct. In the direction towards the fan blade 14, the cross-sectional size of the axial ventilation duct a gradually decreases, which can well collect the surrounding air to form an air flow, and the blowing experience is stronger.

[0045] Here, the radial air inlet channel 111 is a multi-row grille or multi-row air holes axially provided on the rear mesh cover 11. The size of the mesh holes and other ventilation structures of the rear mesh cover 11 are not specifically limited here.

[0046] The outer side of the rear mesh cover 11 is rotatably connected to the base 2. The structure of the base 2 will not be elaborated here as it belongs to the prior art.

[0047] As Figure 2 As shown, the motor 121 and its shaft, the front mesh 17, the rear mesh cover 11, and the fan blade 14 in the present invention are arranged along a central axis; in particular, the rear mesh cover 11, the heating bracket 131, and the closed annular air duct 12 are along a central axis.

[0048] With the assistance of the guiding groove or guiding rib feature and under the action of the toggle handle 16, the annular wind shield 15 moves back and forth or slides along the central axis direction, so as to close and open the radial air inlet channel 111 and regulate the size of the radial air intake. Of course, the control of the annular wind shield 15 can be manually driven, and of course, an automatic driving method can also be adopted. When the annular wind shield 15 is driven automatically, the automatic driving device can be composed of a transmission structure and a motor drive. For example, the annular wind shield 15 is driven to move back and forth by an electric push rod, and no specific description is made here.

[0049] As Figure 5 and Figure 7As shown, when warm air is needed, manually turn the annular wind deflector 15 to close the radial air inlet channel 111, thereby reducing the air inlet area and air volume, and only realizing axial air inlet, which can make the air coming out of the front grille 17 warmer and the warm air more evenly distributed;

[0050] As Figure 4 and Figure 6 shown, when cold air is needed, manually turn the annular wind deflector 15 to open the radial air inlet channel 111, realizing simultaneous bidirectional air inlet in the radial and axial directions, thereby increasing the air inlet area and air volume; making the air volume coming out of the front grille 17 larger and cooler.

[0051] 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, it is also possible to arbitrarily select in real time a state in which the radial air inlet size can be adjusted between these two states; the opening and closing size of the radial air inlet channel depends on the actual requirements of the product design; the manual and automatic opening and closing methods also depend on the product positioning, which are not limited and elaborated herein in the present invention.

[0052] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or alterations derived therefrom are still within the protection scope of the present invention.

Claims

1. A variable air duct type warm and cold circulation fan, comprising a rear grille (11), a driving device (12), a heating component (13) and a wind blade (14), wherein the driving device (12) and the heating component (13) are arranged inside the rear grille (11), a rotating shaft of the driving device (12) penetrates through the heating component (13) and then is connected to the wind blade (14); a circular radial air inlet channel (111) is further arranged on the rear grille (11) between the wind blade (14) and the heating component (13), a section of closed circular air duct (112) is formed at the front end of the rear grille (11), and the closed circular air duct (112) is connected to the radial air inlet channel (111), and is characterized in that, An annular wind shielding ring (15) is also provided at the radial air inlet channel (111); the axial dimension of the annular wind shielding ring (15) is greater than or equal to the axial dimension of the radial air inlet channel (111); the annular wind shielding ring (15) can be axially moved into or out of the radial air inlet channel (111) to control the opening and closing of the radial air inlet channel (111); The annular wind shielding ring (15) is a cylindrical annular shell, which is sleeved on the outer side or the inner side of the rear mesh cover (11), and the annular wind shielding ring (15) and the rear mesh cover (11) are slidably connected in the axial direction; The rear mesh cover (11) is provided with an axially arranged guide groove or guide rib, and the shell of the annular wind shielding ring (15) is provided with a corresponding guide rib or guide groove, and the annular wind shielding ring (15) can slide axially along the rear mesh cover (11).

2. The variable air duct type warm and cold circulating fan according to claim 1, wherein The heating component (13) comprises a heating bracket (131) and a heating element (132); a circumferentially closed axial ventilation duct (a) is formed in the heating bracket (131); the heating element (132) is fixed in the axial ventilation duct (a) of the heating bracket (131); and the heating bracket (131) and the rear mesh cover (11) are detachably fixedly connected, so that the wind generated by the fan blade (14) enters the closed annular air duct (112) through the axial ventilation duct (a) and the heating element (132) and is discharged.

3. The variable air duct type warm and cold circulating fan according to claim 2, characterized in that The annular wind shielding ring (15) is arranged on the inner side of the heating bracket (131), and a toggle handle (16) is provided on the annular wind shielding ring (15). The toggle handle (16) radially penetrates an axial long hole (b) arranged on the heating bracket (131) and extends out of the outer side surface of the rear mesh cover (11); by axially toggling the toggle handle (16), the annular wind shielding ring (15) is moved along the inner side surface of the heating bracket (131), so that the annular wind shielding ring (15) gradually closes or opens the radial air inlet channel (111) on the rear mesh cover (11).

4. The variable air duct type cold and warm circulation fan according to claim 3, characterized in that, The axial ventilation duct (a) is a conical air duct, and the ventilation cross-sectional size of the axial ventilation duct (a) gradually decreases in the direction toward the fan blade (14).

5. A variable air duct type warm and cold circulating fan according to any one of claims 1-4, characterized in that, The radial air inlet channel (111) is a plurality of rows of grilles or a plurality of exhaust holes axially arranged on the rear mesh cover (11).

6. The variable air duct type cooling and heating circulation fan according to claim 5, characterized in that, A front net (17) is also provided at the front end of the rear net cover (11), and a detachable fixed connection is formed between the front net (17) and the closed annular air duct (112).

7. A variable air duct type warm and cold circulating fan according to claim 1, characterized in that, The cooling and heating circulation fan is also provided with a base (2), and the outer side surface of the rear mesh cover (11) is rotatably connected to the base (2).

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