A cooling and heating fan device with adjustable air inlet

Abstract

The present invention discloses a cooling and heating fan device with adjustable air intake, a radial air intake channel is further provided on the rear mesh cover between the fan blades and the heating component, a closed annular air duct is formed at the front end of the rear mesh cover, the closed annular air duct is coaxially connected to the radial air intake channel, a plurality of axially arranged partition bars are provided on the radial air intake channel, a radial air intake gap is formed between two adjacent partition bars, a cylindrical wind shield ring is further provided at the radial air intake channel, the wind shield ring fits with the surface of the entire radial air intake channel and can rotate along the circumferential surface of the radial air intake channel; the wind shield ring is a grille structure, provided with a plurality of axially arranged bars; when the bars on the wind shield ring rotate to the radial air intake gap position, the radial air intake gap on the radial air intake channel is closed, and when the bars on the wind shield ring rotate to the partition bar position, the radial air intake gap on the radial air intake channel is opened, which can completely avoid the phenomenon of cold air being mixed with warm air, and effectively improve the user's body feeling.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a cooling and heating fan device with adjustable air inlet. 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 a heater for heating and a fan for blowing air, especially cooling and heating circulation fans. Cooling and heating circulation fans can be used as both heaters and fans, taking into account both cooling and heating, achieving multi-purpose use of one machine. Due to the fixed product structure of cooling and heating circulation fans, the axial flow 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 front mesh, and the physical sensation is not very ideal.

[0003] For example, Chinese patent document CN 206903897 discloses a dual-purpose electric circulation fan for both natural and warm air. When used as a heater, the radial airflow does not pass through the heating element. As a result, the hot air blown out is significantly mixed with cold air, and the wind force is relatively strong, resulting in an unsatisfactory user experience. To address the heating issues associated with axial-flow impellers in cooling and heating circulation fans, there is an urgent need to optimize the structure of existing cooling and heating circulation fans to ensure heating comfort without sacrificing cold air flow. 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 fan has a large heating air volume and is mixed with unheated cold air, resulting in an unsatisfactory body experience. To this end, the present invention provides a heating and cooling fan device with adjustable air inlet, which can not only adjust the cold air volume, but also greatly improve the heating body experience.

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

[0006] A cooling and heating fan device with adjustable air inlet comprises a rear mesh cover, a driving device, a heating component and fan blades, wherein the driving device and the heating component are arranged in the rear mesh cover, and the rotating shaft of the driving device passes through the heating component and is connected to the fan blades; a radial air inlet channel is further provided on the rear mesh cover between the fan blades and the heating component, and a closed annular air duct is formed at the front end of the rear mesh cover, and the closed annular air duct is coaxially connected to the radial air inlet channel, and a plurality of axially parallel spacers are provided on the radial air inlet channel, and two adjacent spacers are connected. A radial air inlet gap is formed between the partition bars, and a cylindrical air shield ring is further provided at the radial air inlet channel, which fits the surface of the entire radial air inlet channel and can rotate along the circumferential surface of the radial air inlet channel; the air shield ring is a grille structure, on which are provided a plurality of axially arranged bars; when the bars on the air shield ring rotate to the radial air inlet gap position, the radial air inlet gap on the radial air inlet channel is closed, and when the bars on the air shield ring rotate to the partition bar position, the radial air inlet gap on the radial air inlet channel is opened.

[0007] Furthermore, the partition bars on the radial air inlet channel 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 inlet gaps, and the length and width of the bars are greater than the length and width of the radial air inlet gaps.

[0008] The partition bars on the radial air inlet channel are arranged at a local position or an entire circumferential position of the rear mesh cover.

[0009] Further preferably, the wind shield ring is placed on the outer side of the radial air inlet channel, and the connecting end of the closed annular air duct and the radial air inlet channel is provided with a connecting structure for rotating and positioning the wind shield ring.

[0010] The connection structure includes an annular groove provided on the closed annular air duct and a positioning protrusion provided on the inner side of the wind shield ring. The positioning protrusion is placed in the annular groove. When the wind shield ring rotates, the positioning protrusion is slidably connected to the annular groove.

[0011] 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.

[0012] The axial ventilation duct is a tapered duct, and the ventilation cross-sectional size of the axial ventilation duct gradually decreases in the direction toward the fan blades.

[0013] A front net is also provided on the inner side of the front end of the rear net cover, and a detachable fixed connection is formed between the outer circular surface of the front net and the inner side surface of the closed annular air duct. When the radial air inlet channel is opened, the axial wind and radial wind generated by the rotation of the fan blades driven by the driving device are discharged through the front net.

[0014] The technical solution of the present invention has the following advantages:

[0015] A. The present invention provides a rotatable wind shield ring at the radial air inlet channel position of the rear mesh cover. When the bars on the wind shield ring rotate to the spacer position or the radial air inlet gap position, the radial air inlet channel is opened and closed, thereby realizing switching between cold air and warm air. This can completely avoid the phenomenon of cold air being mixed with warm air, effectively improving the user experience. At the same time, when the air is cold, the rotation position of the wind shield ring can also be used to adjust the size of the radial air inlet gap of the radial air inlet channel. By adjusting the radial cold air intake volume, the total air output can be controlled, providing a stronger user experience.

[0016] B. The present invention establishes a tapered axial ventilation duct to effectively collect surrounding air to form an intake airflow, and blows it out evenly and concentratedly, providing a stronger blowing feeling. It also has a simple structure and a novel structural form. The radial air intake channel is opened and closed through the circular rotation of the wind shield ring, which effectively regulates the radial air intake volume without reducing the air intake volume of the axial ventilation duct, allowing users to have a softer heating experience.

[0017] C. The present invention provides a wind shield ring and establishes a tapered 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, allowing users to get warm in the shortest time and experience a more comfortable feeling.

[0018] D. The present invention has a simple structure and adopts a rotational dislocation adjustment method, which is low in cost and has advantages. The product production process is also simple and easy to operate; and there are no more restrictions on the product appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention, the following will briefly introduce the drawings required for use in the specific embodiments. 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 any creative work.

[0020] Figure 1 This is a side view of the cooling and heating circulation fan;

[0021] Figure 2 It is a three-dimensional schematic diagram of the windshield ring separated from the body (rotational schematic diagram, axis schematic diagram);

[0022] Figure 3 It is a cross-sectional view of the fuselage;

[0023] Figure 4 It is a three-dimensional schematic diagram when the wind shield ring is opened;

[0024] Figure 5 It is a schematic diagram of the air flow when the wind shield ring is opened;

[0025] Figure 6 This is a cross-sectional view (including partial enlargement) of the radial channel in the open state when the wind shield ring is opened;

[0026] Figure 7 It is a three-dimensional schematic diagram when the wind shield ring is closed;

[0027] Figure 8 It is a schematic diagram of the air flow when the wind shield ring is closed;

[0028] Figure 9 This is a cross-sectional view (including partial enlargement) of the radial air inlet channel in a closed state when the wind shield ring is closed;

[0029] The following are marked in the figure:

[0030] 1-Rear grille

[0031] 11- radial air inlet channel, 111- partition

[0032] 12- Closed annular air duct

[0033] 2-Drive device

[0034] 21-motor, 22-motor cover

[0035] 3-Heating components

[0036] 31-heating bracket, 32-heating element

[0037] 4-Fan blade

[0038] 5-wind shield ring, 51-grid

[0039] 6-Connection structure

[0040] 61-annular groove, 62-positioning protrusion

[0041] 7-front net, 71-front net annulus;

[0042] a- radial air inlet gap, b- axial ventilation duct. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] like Figure 1 、 Figure 2 and Figure 3 As shown, the present invention provides a cooling and heating fan device with adjustable air inlet, comprising a rear mesh cover 1, a driving device 2, a heating component 3 and a fan blade 4, the driving device 2 and the heating component 3 are arranged in the rear mesh cover 1, and the rotating shaft of the driving device 2 passes through the heating component 3 and is connected to the fan blade 4; a radial air inlet channel 11 is also provided on the rear mesh cover 1 between the fan blade 4 and the heating component 3, and a closed annular air duct 12 is formed at the front end of the rear mesh cover 1, the closed annular air duct 12 is coaxially connected to the radial air inlet channel 11, a plurality of axially parallel spacers 111 are provided on the radial air inlet channel 11, and a radial air inlet gap a is formed between two adjacent spacers 111, and a cylindrical wind shield ring 5 is also provided at the radial air inlet channel 11, the rear mesh cover 1 and The wind shield ring 5 has a central axis, and the wind shield ring 5 fits with the surface of the entire radial air inlet channel 11 and can rotate along the circumferential surface of the radial air inlet channel 11. The wind shield ring 5 can be arranged on the inner side of the radial air inlet channel 11. The present invention preferably sets it on the outside of the radial air inlet channel 11; the wind shield ring 5 is preferably a grille structure, on which a plurality of axially arranged bars 51 are provided; when the bars 51 on the wind shield ring 5 rotate to the position of the radial air inlet gap a, the radial air inlet gap a on the radial air inlet channel 11 is closed, and when the bars 51 on the wind shield ring 5 rotate to the position of the partition bar 111, the radial air inlet gap a on the radial air inlet channel 11 is opened, thereby realizing the control of the air intake amount of the radial air inlet channel 11, and the structure is simple.

[0045] The present invention preferably arranges the ribs 111 of the radial air inlet channel 11 at equal intervals in the circumferential direction, while the bars 51 of the wind shield ring 5 are also arranged at equal intervals in the circumferential direction. The center-to-center distance between two adjacent bars 51 is equal to the center-to-center distance between two adjacent radial air inlet gaps a, and the length and width of the bars 51 are greater than the length and width of the radial air inlet gaps a. When the wind shield ring 5 is rotated a certain angle, the bars 51 completely cover the radial air inlet gaps a, thereby blocking radial wind from entering. Of course, the size of the radial air inlet gaps a can also be changed by rotating the wind shield ring 5, thereby changing the air intake volume, providing a different user experience.

[0046] In the present invention, the partition bars 111 on the radial air inlet channel 11 can be set at a local position or the entire circumference of the rear mesh cover 1, such as above, below, or on the left and right sides of the rear mesh cover. In the present invention, it is preferred that the partition bars 111 are evenly and evenly spaced in the circumferential direction of the entire rear mesh cover 1. At the same time, the grid bars 51 are evenly and evenly spaced on the entire circumferential surface of the wind shield ring 5.

[0047] like Figure 3 As shown, the windshield ring 5 is sleeved onto the outer side of the radial air inlet channel 11. A connecting structure 6 for rotatably positioning the windshield ring 5 is provided at the connection between the enclosed annular air duct 12 and the radial air inlet channel 11. The connecting structure 6 includes an annular groove 61 provided on the enclosed annular air duct 12 and positioning protrusions 62 provided on the inner side of the windshield ring 5. The positioning protrusions 62 can be provided at two or more symmetrical points on the inner side of the windshield ring 5. The positioning protrusions 62 are seated in the annular groove 61. When the windshield ring 5 rotates, the positioning protrusions 62 and the annular groove 61 form a sliding connection.

[0048] The heating component 3 includes a heating bracket 31 and a heating element 32. A circumferentially closed axial ventilation duct b is formed in the heating bracket 31. The heating element 32 is fixed in the axial ventilation duct b of the heating bracket 31, and the heating bracket 31 forms a detachable fixed connection with the inner side of the rear mesh cover 1, so that the wind generated by the fan blades 4 enters the closed annular air duct 12 through the axial ventilation duct b and the heating element 32 and is discharged. The heating element 32 is a prior art and will not be described here. In the present invention, it is preferred that the heating bracket 31 is conical, that is, the axial ventilation duct b is a conical air duct. In the direction toward the fan blades 4, the ventilation cross-sectional size of the axial ventilation duct b gradually decreases, so that the axial wind is gradually concentrated and discharged out of the machine body.

[0049] At the same time, the present invention also provides a front net 7 at the front end of the rear net cover 1, and a detachable fixed connection is formed between the front net 7 and the closed annular air duct 12, which has the functions of safety protection and air outlet. Figure 3 As shown, the front mesh annular surface 71 of the front mesh 7 extends into the closed annular air duct 12, and is parallel to the inner side surface of the closed annular air duct 12 to form a detachable fixed connection. The radial wind and axial wind formed by the rotation of the fan blades 4 driven by the driving device 2 enter the inner cavity of the front mesh annular surface 71 and are discharged from the front mesh 7. Of course, the front mesh can also be fixedly connected to the outer side surface of the closed annular air duct 12, which will not be repeated here.

[0050] The bars 51 on the wind shield ring 5 are equal to or larger than the radial air inlet gap a, and the wind shield ring 5 can be movably arranged on the rear grille 1 and can rotate in the circumferential direction.

[0051] When the wind shield ring 5 rotates, the perforations on it align with the perforations of the rear mesh cover 1, thus opening the radial air inlet channel 11. Conversely, when the wind shield ring 5 rotates, its bars 51 close the radial air inlet gap a of the rear mesh cover 1, thus closing the radial air inlet channel.

[0052] The windshield ring 5 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.

[0053] When you need to use warm air, Figure 7 、 Figure 8 and Figure 9 As shown, manually rotating the wind shield ring 5 and closing the radial air inlet channel 11 can reduce the air inlet area and air inlet volume; only axial air inlet can make the wind coming out of the front net 7 warmer and make the warm air more uniform.

[0054] When cold air is needed, Figure 4 、 Figure 5 and Figure 6 As shown, manually rotate the wind shield ring 5 and open the radial air inlet channel 11, so that air can enter in both radial and axial directions, thereby increasing the air inlet area and air volume; making the air volume coming out of the front net 7 larger and cooler.

[0055] As described above, the process of opening and closing the radial air inlet channel 11 is the two most basic states of the implementation of the present invention; the wind shield ring 5 can also be set between these two extreme states, and the state of the adjustable radial air inlet size can be selected in real time; the size of the opening and closing 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; this is not limited or summarized here in the present invention.

[0056] The present invention is a structure with adjustable air intake, which can be particularly applied to cooling and heating fans. A rotatable cylindrical wind shield ring 5 is provided in a circle close to the fan blades 4, that is, the radial air intake channel 11, to open and close the radial air intake channel 11 for free switching between cold air and warm air. The bars 51 on the wind shield ring 5 are used to control and adjust the size of the air intake volume to improve the phenomenon of cold air mixed in with warm air and improve product performance. The present invention has a simple and concise structure and a simple principle, which improves the user experience and product performance as a whole.

[0057] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A cooling and heating fan device with adjustable air inlet, comprising a rear mesh cover (1), a driving device (2), a heating component (3) and a fan blade (4), wherein the driving device (2) and the heating component (3) are arranged in the rear mesh cover (1), and the rotating shaft of the driving device (2) passes through the heating component (3) and is connected to the fan blade (4); a radial air inlet channel (11) is further provided on the rear mesh cover (1) between the fan blade (4) and the heating component (3), and a closed annular air duct (12) is formed at the front end of the rear mesh cover (1), and the closed annular air duct (12) is coaxially connected to the radial air inlet channel (11), and a plurality of axially arranged spacers (111) are provided on the radial air inlet channel (11), and a radial air inlet gap (a) is formed between two adjacent spacers (111), characterized in that The radial air inlet channel (11) is also provided with a cylindrical air shield ring (5), the air shield ring (5) is in contact with the surface of the entire radial air inlet channel (11), and can rotate along the circumferential surface of the radial air inlet channel (11); the air shield ring (5) is a grid structure, and is provided with a plurality of grating bars (51) arranged in an axial direction; when the grating bars (51) on the air shield ring (5) rotate to the position of the radial air inlet gap (a), the radial air inlet gap (a) on the radial air inlet channel (11) is closed; when the grating bars (51) on the air shield ring (5) rotate to the position of the spacer bars (111), the radial air inlet gap (a) on the radial air inlet channel (11) is opened; The spacers (111) on the radial air inlet channel (11) are arranged at equal intervals in the circumferential direction, the bars (51) on the wind shield ring (5) are arranged at equal intervals in the circumferential direction, the center distance between two adjacent bars (51) is equal to the center distance between two adjacent radial air inlet gaps (a), and the length and width of the bars (51) are greater than the length and width of the radial air inlet gaps (a).

2. The cooling and heating fan device with adjustable air inlet according to claim 1, characterized in that: The spacers (111) on the radial air inlet channel (11) are arranged at a local position or an entire circumferential position of the rear mesh cover (1).

3. The cooling and heating fan device with adjustable air inlet according to claim 2, characterized in that: The wind shield ring (5) is sleeved on the outer side of the radial air inlet channel (11), and a connecting structure (6) for rotating and positioning the wind shield ring (5) is provided at the connecting end between the closed annular air duct (12) and the radial air inlet channel (11).

4. The cooling and heating fan device with adjustable air inlet according to claim 3, characterized in that: The connecting structure (6) comprises an annular groove (61) provided on the closed annular air duct (12) and a positioning protrusion (62) provided on the inner side surface of the wind shield ring (5); the positioning protrusion (62) is placed in the annular groove (61); when the wind shield ring (5) rotates, the positioning protrusion (62) and the annular groove (61) are in sliding connection.

5. The cooling and heating fan device with adjustable air inlet according to any one of claims 1 to 4, characterized in that: The heating component (3) comprises a heating bracket (31) and a heating element (32); a circumferentially closed axial ventilation duct (b) is formed in the heating bracket (31); the heating element (32) is fixed in the axial ventilation duct (b) of the heating bracket (31); and the heating bracket (31) and the rear mesh cover (1) form a detachable fixed connection, so that the wind generated by the fan blade (4) enters the closed annular air duct (12) through the axial ventilation duct (b) and the heating element (32) and is discharged.

6. The cooling and heating fan device with adjustable air inlet according to claim 5, characterized in that: The axial ventilation duct (b) is a conical air duct, and the ventilation cross-sectional size of the axial ventilation duct (b) gradually decreases in the direction toward the fan blade (4).

7. The cooling and heating fan device with adjustable air inlet according to claim 1, characterized in that: A front net (7) is further provided on the inner side of the front end of the rear net cover (1), and a detachable fixed connection is formed between the outer circular surface of the front net (7) and the inner side surface of the closed annular air duct (12). When the radial air inlet channel (11) is opened, the axial wind and radial wind generated by the rotation of the fan blades (4) driven by the driving device (2) are discharged through the front net (7).

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