A cooling and heating circulation fan with variable air duct

Abstract

The present invention discloses a cold and warm circulation fan with a variable air duct. A radial air inlet channel is 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 inlet channel. A windshield is also provided at the outer circumferential surface of the radial air inlet channel. One end of the windshield is rotatably hinged with the rear mesh cover through a fixed connector. When the windshield rotates in a direction away from the radial air inlet channel, the windshield opens the radial air inlet channel. When the windshield rotates in the opposite direction to the outer circumferential surface position of the radial air inlet channel, the windshield closes the radial air inlet channel. The present invention arranges a plurality of windshields rotating along the axial direction at the circumferential position of the radial air inlet channel of the rear mesh cover. The windshield completely blocks the radial wind from directly bypassing the heating component and entering the sealed annular air duct, thereby completely avoiding the phenomenon of cold air being mixed with warm air. The air outlet effect is softer, and the user's body feeling is effectively improved.

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 a 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, and achieving multiple uses of one machine. Because cold and warm circulation fans have a fixed product structure, 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 front net, 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 problems 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 heating and cooling circulation fan with a variable air duct, 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] The fan of claim 1, wherein the drive device and the heat generating assembly are arranged in the rear mesh cover, and the rotating shaft of the drive device passes through the heat generating assembly and is connected to the fan blade; a radial air inlet channel is also provided on the rear mesh cover between the fan blade and the heat generating assembly; 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 with the radial air inlet channel; a wind shield for preventing radial air from entering the radial air inlet channel is also provided at the outer circumferential surface of the radial air inlet channel, and one end of the wind shield is rotatably hinged with the rear mesh cover through a fixed connecting piece; when the wind shield rotates in a direction away from the radial air inlet channel, the wind shield opens the air inlet channel of the radial air inlet channel, and when the wind shield rotates in the opposite direction to the outer circumferential surface position of the radial air inlet channel, the wind shield closes the air inlet channel of the radial air inlet channel.

[0007] Preferably, the fixed connection member is a hinge mechanism, which is arranged at one end of the radial air inlet channel, and the wind shield plate is controlled by one end of the radial air inlet channel to open and close the air inlet channel of the radial air inlet channel by rotating.

[0008] Further preferably, the fixed connection member is arranged on the outside of the closed annular air duct, and the wind shield is positioned at a rotation angle by the fixed connection member.

[0009] The wind shields are arranged in plurality along the outer circumferential direction of the radial air inlet channel, and the fixed connectors connected to each wind shield are respectively arranged at one end or both ends of the radial air inlet channel, and each wind shield is rotatably hinged with the rear mesh cover via the fixed connectors.

[0010] The wind shield is provided with at least two wind shields in the circumferential direction which can be spliced ​​into a circle along the direction of the radial air inlet channel.

[0011] The rear mesh cover is a shell-like structure with multiple holes and / or grids, and a buckle is provided at the other end opposite to the hinged end of the wind shield. When the wind shield is buckled in the radial air inlet channel, the buckle is snap-fitted and fixed with the holes or grids on the rear mesh cover.

[0012] The heating component includes a heating bracket and a heating element. A circumferentially closed axial ventilation duct is formed in the heating bracket, which is connected to the axial air intake entering through the rear mesh of the rear mesh cover. The heating element is fixed in the axial ventilation duct of the heating bracket, and the heating bracket and the rear mesh cover form a detachable fixed connection, so that the axial air intake generated by the fan blade enters the closed annular air duct through the axial ventilation duct and the heating element and is discharged.

[0013] 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 blade.

[0014] A front net is also provided on the inner side surface of the front end of the rear net cover, and a detachable fixed connection is formed between the outer cylindrical 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.

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

[0016] A. The present invention arranges a plurality of windshields rotating in a direction perpendicular to the axial air inlet at the circumferential position of the radial air inlet channel of the rear mesh cover. The windshields can completely close all radial ventilation ducts on the radial air inlet channel, completely blocking the radial wind from directly bypassing the heating component and entering the sealed annular air duct, and only retains the normally open axial wind to form warm air after being completely heated by the heating component, thereby completely avoiding the phenomenon of cold air being mixed with warm air, making the air outlet effect softer and effectively improving the user's body feeling; and after opening a plurality of windshields or a few windshields, the air inlet channel and the air inlet volume can be enlarged, realizing radial and axial two-way air inlet, making the air volume discharged from the front mesh larger and cooler; and switching between cold air and warm air is more convenient.

[0017] B. The present invention establishes a tapered axial ventilation duct to effectively collect surrounding air to form an axial air intake airflow, and blows it out in a concentrated and uniform manner, which provides a stronger blowing feeling, and has a simple structure and a novel structural form. By controlling the number and opening angle of the wind shields, the total amount of air intake into the radial air intake channel can be controlled in the cold wind state without reducing the air intake of the normally open axial ventilation duct.

[0018] C. The present invention provides a wind shield and establishes a conical axial ventilation duct, which not only fully optimizes the performance of the product in the warm air state, but also allows the environment within a certain space to heat up quickly, shortens the heating time, and allows users to get warm in the shortest time and experience more comfort.

[0019] D. The present invention has a simple structure and low cost; the hinged structure does not impose more restrictions on the product appearance and is easier to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1This is a schematic diagram of the windshield provided by the present invention in a closed state;

[0022] Figure 2 is a schematic diagram of the windshield provided by the present invention when it is rotated to the middle position;

[0023] Figure 3 is a schematic diagram of the windshield provided by the present invention being in a maximum open state;

[0024] Figure 4 is a schematic diagram of one of the windshields on the circumference provided by the present invention being fully opened;

[0025] Figure 5 It is a cross-sectional view of the whole machine provided by the present invention;

[0026] Figure 6 It is a schematic diagram of the buckle provided on the windshield;

[0027] Figure 7 This is a schematic diagram of the heating state when all windshields are closed;

[0028] Figure 8 This is a schematic diagram of the radial air inlet channel being fully opened in the cold air state;

[0029] Fig. 9 It is a schematic diagram of the radial air inlet channel being partially opened in the cold air state.

[0030] The following are marked in the figure:

[0031] 1-rear mesh cover, 11-radial air inlet channel, 111-grid, 12-enclosed annular air duct, 13-rear mesh; 2-driving device; 3-heating component, 31-heating bracket, 32-heating element; 4-fan blades; 5-wind shield; 6-buckle; 7-front mesh, 71-mesh ring surface; 8-fixed connector; 9-machine base; a-radial ventilation duct; b-axial ventilation duct. DETAILED DESCRIPTION

[0032] 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.

[0033] like Figure 1 and Figure 5As shown, the present invention provides a cooling and heating circulation fan with variable air duct, comprising a rear mesh cover 1, a driving device 2, a heating component 3 and a fan blade 4, wherein the rear mesh cover comprises a radial air inlet channel 11, a closed annular air duct 12 and a rear mesh 13, 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; the radial air inlet channel 11 is located on the rear mesh cover 1 between the fan blade 4 and the heating component 3, the closed annular air duct 12 is a section of the air duct arranged at the front end of the rear mesh cover 1, and the closed annular air duct 12 is a section of the air duct arranged at the front end of the rear mesh cover 1. The air duct 12 is coaxially connected with the radial air inlet channel 11. The outer circumferential surface of the radial air inlet channel 11 is also provided with a windshield 5 for preventing radial air from entering the radial air inlet channel 11. One end of the windshield 5 is rotatably hinged with the rear mesh cover 1 through a fixed connection 8. When the windshield 5 rotates in a direction away from the radial air inlet channel 11, the windshield 5 opens the air inlet channel of the radial air inlet channel 11. When the windshield 5 rotates in the opposite direction to the outer circumferential surface position of the radial air inlet channel 11, the windshield 5 closes the air inlet channel of the radial air inlet channel 11. Figure 1 and Figure 7 As shown, the windshield 5 completely blocks the radial ventilation channel a of the radial air inlet channel 11 along the circumference. When the driving device drives the fan blades to rotate, only axial wind entering from the rear net can be generated, which enters the heating component 3 and the closed annular air duct 12 in turn, and is finally discharged from the front net 7. This state is suitable for warm air state. When the heating component 3 is working, the air outlet from the front net 7 will not be mixed with cold air, so that the user experience is better. Of course, when the windshield is opened, radial and axial air can be simultaneously inlet, and the air intake is large, which is very suitable for cold air state, such as Figure 2 and Figure 8 shown.

[0034] in Figure 2 This is a schematic diagram of the windshield in a half-open state. Figure 3 It is a schematic diagram of the state when the wind shield is opened to the maximum position.

[0035] The fixed connection member 8 is preferably a hinge mechanism, which is arranged at one end of the radial air inlet channel 11, and the wind shield 5 is controlled by the one end of the radial air inlet channel 11 to open and close the air inlet channel of the radial air inlet channel 11 by rotating. Figure 2 As shown, the fixed connection member 8 is arranged outside the closed annular air duct 12, and the windshield 5 is rotated and positioned by the fixed connection member 8. The hinge mechanism here is the prior art, and the pin shaft passes through the positioning hole on the fixed block, and the pin shaft and the positioning hole can be interference fit with each other, or can rely on torsion springs to assist the angle positioning and hand feel of opening the windshield, which is not specifically limited in the present invention.

[0036] The windshields 5 in the present invention are arranged along the circumferential direction of the radial air inlet channel 11, and each windshield 5 is rotatably hinged with the rear mesh cover 1 through a fixed connection piece 8. According to actual conditions, at least two windshields 5 can be arranged in the circumferential direction, and all windshields 5 can be assembled into a complete circular surface along the circumferential direction of the radial air inlet channel 11. The windshields 5 in the present invention are equally divided into four pieces in the circumferential direction, and each windshield 5 can be independently opened and controlled. Figure 3 As shown, the four windshields are in the fully opened state. Figure 4 In the embodiment, only one windshield 5 above the rear screen is opened, and the radial wind generated by the rotation of the blades will only enter from the top, and then mix with the generated axial wind and be discharged from the front screen 7 together, such as Fig. 9 If the wind shields 5 are arranged at both ends of the radial air inlet channel 11, the opening directions of adjacent wind shields 5 will be staggered (not shown in the figure). Of course, the hinge mechanism can also be arranged in the axial middle position of the radial air inlet channel 11, which can also achieve the purpose of the present invention, and will not be repeated here.

[0037] The rear screen 1 in the present invention preferably adopts a shell-like structure with multiple holes and / or grids, such as Figure 6 As shown, a buckle 6 is further provided at the other end opposite to the hinged end of the wind shield 5. When the wind shield 5 is buckled in the radial air inlet channel 11, the buckle 6 is snap-fitted and fixed with the hole or grid on the rear mesh cover 1, making the wind shield 5 more stable. Of course, other similar fixing methods can also be used, which are not specifically limited in the present invention.

[0038] like Figure 5 As shown, the heating component 4 includes a heating bracket 31 and a heating element 32. A circumferentially closed axial ventilation duct b is formed in the heating bracket 31, which is connected to the axial air inlet of the rear mesh cover 1. 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 axial air inlet generated by the fan blade 4 enters from the rear mesh 13, and then enters the closed annular air duct 12 through the axial ventilation duct b and the heating element 32, and is discharged from the front mesh 7. The heating element used in the present invention is a prior art and can be purchased from the market, and will not be described here. In the present invention, the heating bracket 31 is preferably set to a conical structure, that is, the axial ventilation duct b forms 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, so that the normally open axial wind is gradually concentrated and discharged out of the machine body.

[0039] The present invention provides a front net 7 at the front end of the rear net cover 1, and the front net 7 is detachably fixedly connected to the closed annular air duct 12, which has the functions of safety protection and air outlet. Figure 3As shown, the front net annular surface 71 of the front net 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 mode, and 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 net annular surface 71 and are discharged from the front net 7. Of course, the inner side surface of the front net 7 can also be fixedly connected with the outer side surface of the front end of the rear net cover, which will not be repeated here.

[0040] The entire rear mesh cover 1 is preferably connected to the base 9 via a rotating mechanism, and the base 9 can be placed on a table, on the ground or in other locations.

[0041] The windshield 5 can be driven to rotate along the hinge mechanism by manual or automatic driving. The automatic driving can be composed of a transmission structure and a motor drive, such as a hydraulic damping telescopic rod. The present invention does not describe it in detail, and manual driving is only one embodiment of the driving method.

[0042] In the present invention, the sum of the plurality of windshields 5 is equal to the area of ​​the radial air inlet passage 11, and each windshield 5 can be movably rotated; each windshield 5 can be rotated independently or synchronously, which is not limited in the present invention.

[0043] It should be noted that the radial air inlet channel 11 here is a grid structure, such as Figure 6 As shown, the radial air inlet channel 11 is composed of a plurality of grid bars 111 arranged along the axial direction, and a radial ventilation channel a is formed between adjacent grid bars 111. When the wind shield 5 is overlapped on the radial air inlet channel 11 with a grid structure, the edges of both sides of the wind shield 5 need to overlap on a local area on one side of the upper surface of the grid bar 111, and the edge of the wind shield 5 connected thereto overlaps on a local area on the other side of the upper surface of the same grid bar 111, so that the radial ventilation channel a can be completely covered to prevent the generation of radial wind. For the radial air inlet channel with air holes, it is also necessary to reserve a closed overlap area that overlaps with the edge of the wind shield, and the purpose is also to prevent the generation of radial wind when the wind shield covers the radial air inlet channel, which will not be repeated here.

[0044] The rotation of the wind shield 5 can close and open the radial air inlet channel 11. Since the circulating fan or the cooling and heating circulating fan has radial and axial two-way air inlet, the axial air inlet is normally open. The following two cases are described for specific application:

[0045] like Figure 7 As shown, when warm air is needed, manually rotate the wind shield 5 downward to put it in a closed state. After closing the radial air inlet channel 11, the air inlet channel and the air intake volume can be reduced; only the normally open axial air inlet can make the wind coming out of the front net 7 warmer and make the warm air more uniform.

[0046] like Figure 8 As shown, when cold air is needed, the wind shield 5 is manually opened, and after the radial air inlet channel 11 is opened, the air inlet channel and the air intake volume can be increased; radial and axial two-way air intake is achieved, so that the air volume coming out of the front net 7 is larger and cooler.

[0047] As described above, the process of opening and closing the radial air inlet channel is the two most basic states of the present invention; it can also be between these two states, such as Fig. 9 As shown, that is, opening or closing part of the wind shield, the state of the adjustable radial air inlet size can be arbitrarily selected in real time; the size and area of ​​the opening and closing wind shield depends on the actual needs of the product design, which is not limited or summarized in the present invention.

[0048] The present invention provides a structure with a variable air duct, which can be particularly applied to cooling and heating fans. In a circle close to the fan blades, that is, the radial air inlet channel, a plurality of rotatable wind shields 5 are arranged on the entire circumference of the radial air inlet channel. The radial air inlet channel 11 can be opened and closed by rotating the wind shields 5, so as to switch freely between cold air and warm air. The wind shields 5 are used to completely close all radial ventilation channels a in the radial air inlet channel 11, so as to improve the phenomenon of mixed cold air during 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.

[0049] 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 cooling and heating circulation fan with a variable air duct, 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 a 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), characterized in that: A windshield (5) for preventing radial air inlet from entering the radial air inlet channel (11) is also provided on the outer circumferential surface of the radial air inlet channel (11); one end of the windshield (5) is rotatably hinged with the rear mesh cover (1) via a fixed connection piece (8); when the windshield (5) rotates in a direction away from the radial air inlet channel (11), the windshield (5) opens the air inlet channel of the radial air inlet channel (11); and when the windshield (5) rotates in the opposite direction to the outer circumferential surface position of the radial air inlet channel (11), the windshield (5) closes the air inlet channel of the radial air inlet channel (11).

2. The cooling and heating circulation fan with variable air duct according to claim 1, characterized in that: The fixed connection member (8) is a hinge mechanism, which is arranged at one end of the radial air inlet channel (11), and the wind shield (5) is controlled by one end of the radial air inlet channel (11) to open and close the air inlet channel of the radial air inlet channel (11) by rotating.

3. The cooling and heating circulation fan with variable air duct according to claim 2, characterized in that: The fixed connection member (8) is arranged on the closed annular air duct (12), and the wind shield (5) is positioned at a rotation angle by means of the fixed connection member (8).

4. The cooling and heating circulation fan with variable air duct according to any one of claims 1 to 3, characterized in that: A plurality of windshields (5) are arranged along the outer circumferential direction of the radial air inlet channel (11); the fixed connection member (8) connected to each windshield (5) is respectively arranged at one end or both ends of the radial air inlet channel (11); and each windshield (5) is rotatably hinged with the rear mesh cover (1) via the fixed connection member (8).

5. The cooling and heating circulation fan with variable air duct according to claim 4, characterized in that: The wind shield (5) is provided with at least two wind shields (5) in the circumferential direction which can be spliced ​​into a circle along the direction of the radial air inlet channel (11).

6. The cooling and heating circulation fan with variable air duct according to claim 5, characterized in that: The rear mesh cover (1) is a shell-like structure with multiple holes and / or grids, and a buckle (6) is provided at the other end opposite to the hinged end of the wind shield (5). When the wind shield (5) is buckled into the radial air inlet channel (11), the buckle (6) is fixedly connected with the holes or grids on the rear mesh cover (1).

7. The cooling and heating circulation fan with variable air duct according to claim 1, 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) and is communicated with the axial air intake entering through the rear net (13) of the rear net cover (1); 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 net cover (1) are detachably fixedly connected, so that the axial air intake 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.

8. The cooling and heating circulation fan with variable air duct according to claim 7, characterized in that: The axial ventilation duct (b) is a conical air duct, and the ventilation cross-sectional dimensions of the axial ventilation duct (b) gradually decrease in the direction toward the fan blade (4).

9. The cooling and heating circulation fan with variable air duct according to claim 1, characterized in that: A front net (7) is also provided on the inner side surface of the front end of the rear net cover (1), and a detachable fixed connection is formed between the outer cylindrical 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).

Images