A blower capable of supplying air in reverse direction

Abstract

The present invention relates to the field of air supply technology. The present invention discloses a blower capable of reversible air supply, comprising a housing, a motor is installed in the housing, and both output ends of the motor are installed with a blade group, the blade group comprises a rotating shaft, a fixed disk and multiple groups of single blades; multiple groups of single blades are arranged circumferentially on the outside of the fixed disk, the rotating shaft is fixed to the output end of the motor, the fixed disk is fixed to the rotating shaft, and the axes of the two coincide; a U-shaped frame is installed inside the housing, and the U-shaped frame is used to control the inclination direction of multiple groups of single blades. The present invention moves the U-shaped frame along the adjustment shaft, contacts the limiting ring layers on both sides respectively, realizes the single blade to form two inclinations, drives the single blade to rotate, and the two inclination changes can realize the reverse air supply of the single blade, reducing the probability of damage; when the single blade rotates, its windward surface will be pushed by the airflow, and the deformation layer can form a depression under the force of pushing, thereby increasing the air volume.

Description

Technical Field

[0001] The invention relates to the technical field of air supply, and in particular to an air supply fan capable of reversible air supply. Background Art

[0002] A blower is a power device that delivers air into a specific area through a mechanical device. Blowers are widely used in industries, construction, agriculture, and other fields. In factories, manufacturing industries, and other places, blowers can effectively discharge industrial waste gas and reduce environmental pollution. At the same time, it can also create a suitable environment inside the factory, so that workers can breathe fresh air during the production process, thereby improving work efficiency. In the field of construction, blowers are often used for ventilation at construction sites and air circulation inside buildings.

[0003] However, under some harsh conditions, the blower needs to be fixed in a specific location, such as a tunnel wall, a mine wall or a certain part of industrial equipment. This fixed installation requires the blower to have a solid structure and a reliable fixing method to ensure its stability and safety during operation. In addition, it needs to have the function of positive and negative air supply. When rotating forward, the blower can supply fresh air or cooling air to the designated area; when rotating reversely, it can exhaust dirty air or hot air. This positive and negative air supply function is essential to maintain air quality and temperature control in a specific area.

[0004] The above-mentioned blowers generally use reversible blowers, which are designed with reversible motors and blades. The air supply direction of the blades can be changed by changing the rotation direction of the motor. However, since the motor of the reversible blower needs to be frequently reversed, this may increase the wear and failure rate of the motor. Especially when reversing, the internal parts of the motor may be subjected to greater impact force, thereby accelerating aging. The different force conditions of the blades during forward and reverse rotation may cause more serious wear and deformation of the blades. Based on this, it is necessary to use a blower that can achieve forward and reverse delivery with an ordinary motor in order to reduce the probability of damage. Summary of the invention

[0005] The object of the present invention is to provide a blower capable of reversible air supply to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: A blower capable of reversible air supply, comprising a housing, a motor installed in the housing, a fan blade group installed at both output ends of the motor, the fan blade group comprising a rotating shaft, a fixing plate and a plurality of groups of single fan blades;

[0007] A plurality of groups of single-piece fan blades are arranged circumferentially distributed outside the fixed disk, the rotating shaft is fixed to the output end of the motor, the fixed disk is fixed to the rotating shaft, and the axes of the two coincide;

[0008] A U-shaped frame is installed inside the shell, and the U-shaped frame is used to control the tilt direction of multiple groups of single fan blades. When the rotation direction of the motor remains unchanged, the fan blade group can realize reverse air supply.

[0009] Furthermore, a limit strip is fixed to the inner wall of the upper end of the shell, and the U-shaped frame is slidably clamped in the limit strip;

[0010] An adjusting shaft is fixed on the outer side of the fixed plate, and two limiting ring layers are formed on the adjusting shaft. Bearing rings are rotatably mounted on the inner sides of both ends of the U-shaped frame. The adjusting shaft passes through both ends of the bearing ring and the U-shaped frame, and both ends of the bearing ring and the U-shaped frame are clamped in the two limiting ring layers.

[0011] The multiple groups of single fan blades are rotatable, and an L-shaped shaft is connected between the single fan blade and the bearing ring. When the bearing ring is close to the limiting ring layers on both sides, it is used to adjust the inclination degree of the single fan blade.

[0012] Furthermore, a fastening bolt is threadedly connected to the U-shaped frame, and the outer end of the fastening bolt abuts against the inner wall of the shell to adjust whether the U-shaped frame is fastened.

[0013] Furthermore, the single wind blade includes a sheet-shaped leaf, a circular hole is opened on the inner side corner of the sheet-shaped leaf, the L-shaped shaft is fixed to the bearing ring, a circular end is fixed to the outer end of the L-shaped shaft, the circular end is embedded in the circular hole, and the circular end is rotatable in the circular hole.

[0014] Furthermore, a plurality of circularly distributed snap-in slots are provided on the outer side of the fixed disk, and the single wind blade also includes a snap block and a deformation layer. The snap block is fixed in the snap-in slot, and the outer side of the snap block is rotatably connected to the leaf, so that the leaf can be rotated to different degrees of inclination.

[0015] Furthermore, a rectangular opening is formed through the sheet-like leaf, and the deformation layer is installed in the rectangular opening;

[0016] The deformation layer includes two groups of symmetrical sleeve layers 1 and 2, wherein the sleeve layers 1 and 2 are sleeved and can be stretched and deformed, the sleeve layers 2 in the two groups are hinged to each other, and the outer edges of the sleeve layers 1 in the two groups are rotatably connected to the rectangular opening.

[0017] Furthermore, the first and second sleeve layers are both made of flat metal.

[0018] Furthermore, outer blocking layers are fixed on the inner walls on both sides of the rectangular opening, and the side edges of the deformation layer are in contact with the outer blocking layer to block the airflow.

[0019] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0020] 1. The U-shaped frame moves along the adjustment axis and contacts the limiting circles on both sides respectively, so that a single fan blade can form two inclinations and drive the single fan blade to rotate. The two inclination changes can realize the reverse air supply of a single fan blade and reduce the probability of damage.

[0021] 2. The bearing ring can rotate with the single fan blade, and the single fan blade changes its inclination. The round end can still fit in the round hole to maintain the connection, and the inclination of the single fan blade changes smoothly.

[0022] 3. When a single fan blade rotates, its windward side will be pushed by the airflow, and the deformation layer will be pushed to form a depression. On the contrary, when the single fan blade tilts in the opposite direction, the deformation layer will automatically form a depression. When the deformation layer is pushed from both sides, grooves will be formed on both sides respectively, increasing the air volume and improving the air intake of reverse air supply when the motor can only rotate in one direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the fan blade assembly and the U-shaped frame structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the fan blade group on one side of the present invention;

[0027] Figure 4 It is a schematic diagram of the connection structure between the fan blade group and the U-shaped frame on one side of the present invention;

[0028] Figure 5 This is a schematic diagram of the main structure of the fan blade group and the U-shaped frame of the present invention;

[0029] Figure 6 This is a schematic diagram of the connection structure between the fan blade group and the U-shaped frame of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of a single fan blade of the present invention;

[0031] Figure 8 It is a schematic diagram of the exploded structure of a single fan blade of the present invention.

[0032] In the figure: 1, casing; 11, limit strip; 2, motor; 3, fan blade assembly; 31, rotating shaft; 32, fixing plate; 321, bayonet; 33, adjusting shaft; 331, limit ring layer; 34, single fan blade; 341, lamellar blade; 342, rectangular opening; 343, outer blocking layer; 344, block; 35, deformation layer; 351, sleeve layer 1; 352, sleeve layer 2; 4, U-shaped frame; 41, fastening bolt; 42, bearing ring; 43, L-shaped shaft; 44, round end; 45, round hole. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0034] See also Figure 1-Figure 8 The present invention provides a technical solution: the motor of the reversible blower needs to be frequently rotated forward and reverse, which may increase the wear and failure rate of the motor. In order to propose a blower that can realize forward and reverse air delivery using an ordinary motor so as to reduce the probability of damage, a reversible blower, such as Figure 1 and Figure 2 As shown, it includes a housing 1, a motor 2 is installed in the housing 1, and a fan blade group 3 is installed at both output ends of the motor 2. The fan blade group 3 includes a rotating shaft 31, a fixing plate 32 and a plurality of groups of single fan blades 34;

[0035] Multiple groups of single blades 34 are circumferentially distributed and arranged outside the fixed disk 32. The rotating shaft 31 is fixed to the output end of the motor 2. The fixed disk 32 is fixed to the rotating shaft 31, and the axes of the two coincide. The motor 2 controls the rotating shaft 31 to rotate, so that the multiple groups of single blades 34 rotate. At the same time, the single blades 34 can be adjusted to achieve two degrees of inclination. When the rotation direction of the motor 2 remains unchanged, reverse air supply is achieved.

[0036] A U-shaped frame 4 is installed inside the shell 1. The U-shaped frame 4 is used to control the inclination direction of multiple groups of single fan blades 34. When the rotation direction of the motor 2 remains unchanged, the fan blade group 3 can achieve reverse air supply. The U-shaped frame 4 is used to change the inclination of the single fan blade 34, and also fix the single fan blade 34 to ensure that the single fan blade 34 remains stable when rotating.

[0037] like Figure 1 As shown, in order to limit the U-shaped frame 4 and enable it to slide, a limit strip 11 is fixed to the inner wall of the upper end of the housing 1, and the U-shaped frame 4 is slidably clamped in the limit strip 11, so that the U-shaped frame 4 can perform lateral reciprocating motion;

[0038] like Figure 4 As shown, in order to limit the range of movement of the U-shaped frame 4 and keep the single fan blade 34 at the best tilt degree, an adjusting shaft 33 is fixed on the outer side of the fixed plate 32, and two circles of limiting ring layers 331 are formed on the adjusting shaft 33. The inner sides of the two ends of the U-shaped frame 4 are rotatably mounted with bearing rings 42 respectively. The adjusting shaft 33 passes through the bearing ring 42 and the two ends of the U-shaped frame 4. The bearing ring 42 and the two ends of the U-shaped frame 4 are clamped in the two circles of limiting ring layers 331. The bearing ring 42 is sleeved on the adjusting shaft 33, and the bearing ring 42 can rotate with the single fan blade 34. The bearing ring 42 is also limited by the U-shaped frame 4. Even if it can rotate, the position will not change, so that the single fan blade 34 rotates stably.

[0039] The multiple groups of single blades 34 are rotatable. An L-shaped shaft 43 is connected between the single blade 34 and the bearing ring 42. When the bearing ring 42 is close to the limiting ring layers 331 on both sides, the inclination degree of the single blade 34 is adjusted.

[0040] like Figure 2 As shown, the rotation of the motor 2 and the fan blade group 3 will generate vibration, and the rotation of the single fan blade 34 will also generate force, so the U-shaped frame 4 needs to be fixed. The U-shaped frame 4 is threaded with a fastening bolt 41, and the outer end of the fastening bolt 41 is against the inner wall of the shell 1 to adjust whether the U-shaped frame 4 is fastened. The fastening bolt 41 is used to fix the inclination degree of the single fan blade 34 to avoid deformation during rotation.

[0041] like Figure 5 and Figure 6 As shown, the U-shaped frame 4 is in contact with the limiting ring layer 331 on one side and is limited, which can make the single fan blade 34 tilted and fixed. On the contrary, the U-shaped frame 4 is in contact with the limiting ring layer 331 on the other side and is limited, so that the single fan blade 34 is oppositely tilted and fixed, realizing reverse air supply.

[0042] like Figure 7 As shown, the single fan blade 34 includes a lamellar leaf 341, and a circular hole 45 is opened on the inner side corner of the lamellar leaf 341. The L-shaped shaft 43 is fixed to the bearing ring 42. The outer end of the L-shaped shaft 43 is fixed with a circular end 44, which is embedded in the circular hole 45, and the circular end 44 is rotatable in the circular hole 45. The circular end 44 can be arbitrarily rotated in the circular hole 45, so that during the process of the lamellar leaf 341 tilting and changing, the circular end 44 and the circular hole 45 are in a matched state. Since the outer side of the block 344 is rotatably connected to the lamellar leaf 341, the circular end 44 and the L-shaped shaft 43 can do a pushing movement and can be fixed, so the lamellar leaf 341 can ensure that the position is fixed and can also be adjusted to different tilt states.

[0043] like Figure 7As shown, the single fan blade 34 is limited by the fixed disk 32, and a plurality of circumferentially distributed bayonet holes 321 are provided on the outer side of the fixed disk 32. The single fan blade 34 also includes a block 344 and a deformation layer 35. The block 344 is fixed in the bayonet hole 321, and the outer side of the block 344 is rotatably connected to the leaf 341, so that the leaf 341 can be rotated to different degrees of inclination. The leaf 341 with different degrees of inclination can change the air supply direction.

[0044] like Figure 8 As shown, a rectangular opening 342 is formed through the leaf 341, and the deformation layer 35 is installed in the rectangular opening 342;

[0045] The deformation layer 35 includes two groups of symmetrical sleeve layers 1 351 and sleeve layers 2 352. The sleeve layers 1 351 and sleeve layers 2 352 are sleeved and can be stretched and deformed. The sleeve layers 2 352 in the two groups are hinged to each other. The outer edges of the sleeve layers 1 351 in the two groups are rotatably connected to the rectangular opening 342. The deformation layer 35 is pushed by the airflow and produces a concave shape. The sleeve layers 1 351 and sleeve layers 2 352 of the deformation layer 35 can be stretched and retracted, thereby changing the direction of the depression, so that both reverse air supply and normal air supply can be concave, thereby increasing the air volume.

[0046] The first sleeve layer 351 and the second sleeve layer 352 are both flat metals, which are more easily pushed by the airflow.

[0047] Outer blocking layers 343 are fixed on the inner walls on both sides of the rectangular opening 342. The sides of the deformation layer 35 are in contact with the outer blocking layers 343 to block the airflow. When the airflow moves into the deformation layer 35, it can be blocked by the outer blocking layers 343 on the sides, thereby pushing the airflow.

[0048] The working principle of the present invention is as follows: the motor 2 is used to drive the fan blade groups 3 at both ends to rotate, the U-shaped frame 4 moves along the adjusting shaft 33, and makes the ends of the U-shaped frame 4 and the connected bearing rings 42 contact the limiting ring layers 331 on both sides, so that the single fan blade 34 forms two kinds of inclinations. When the motor 2 rotates, the single fan blade 34 is driven to rotate. The two inclination changes can realize the reverse air supply of the single fan blade 34. The U-shaped frame 4 is fixed by tightening bolts 41, so that the motor 2 only needs to use an ordinary motor to reduce the probability of damage.

[0049] In addition, since the bearing ring 42 can rotate with the single fan blade 34, the single fan blade 34 changes its inclination degree, and the circular end 44 can still fit in the circular hole 45 to maintain connection, the inclination of the single fan blade 34 can change smoothly, and the inclination degree of each group of single fan blades 34 can be kept consistent.

[0050] When a single fan blade 34 rotates, its windward surface will be pushed by the airflow, and the deformation layer 35 will be pushed to form a depression, which can increase the air volume. On the contrary, when the single fan blade 34 is tilted in the opposite direction, the windward surface is also pushed by the airflow, and the deformation layer 35 automatically forms a depression. When the deformation layer 35 is pushed from both sides respectively, grooves can be formed on both sides respectively, which increases the air volume and improves the air intake of the reverse air supply when the motor 2 can only rotate in one direction.

[0051] It should be noted that when the single blade 34 rotates, the raised back of the single blade 34 will make the air flow rate near the single blade 34 faster than the air flow rate at a distance, and the air pressure at the back of the single blade 34 is lower than that at a distance. Under the action of the pressure difference, the air at a distance will flow toward the single blade 34, forming an effective air flow. This design allows the air to flow more smoothly under the action of the single blade 34, reducing resistance and improving the efficiency of the single blade 34. In addition, the concave surface of the single blade 34 can increase the turbulence of the airflow, better mix the airflow, and thus increase the air volume of the single blade 34.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A blower capable of reversible air supply, comprising a housing (1), a motor (2) being installed in the housing (1), and fan blade groups (3) being installed at both output ends of the motor (2), characterized in that: The fan blade group (3) comprises a rotating shaft (31), a fixing plate (32) and a plurality of groups of single fan blades (34); A plurality of groups of single-piece fan blades (34) are arranged in a circumferential distribution outside the fixed disk (32); the rotating shaft (31) is fixed to the output end of the motor (2); the fixed disk (32) is fixed to the rotating shaft (31), and the axes of the two coincide with each other; A U-shaped frame (4) is installed inside the housing (1), and the U-shaped frame (4) is used to control the tilt direction of multiple groups of single fan blades (34), so that when the rotation direction of the motor (2) remains unchanged, the fan blade group (3) can achieve reverse air supply; A limit strip (11) is fixed to the inner wall of the upper end of the housing (1), and the U-shaped frame (4) is slidably clamped in the limit strip (11); An adjusting shaft (33) is fixed on the outer side of the fixed plate (32), and two limiting ring layers (331) are formed on the adjusting shaft (33). Bearing rings (42) are rotatably mounted on the inner sides of both ends of the U-shaped frame (4), and the adjusting shaft (33) passes through both ends of the bearing ring (42) and the U-shaped frame (4). Both ends of the bearing ring (42) and the U-shaped frame (4) are clamped in the two limiting ring layers (331); The plurality of groups of the single fan blades (34) are rotatable, an L-shaped shaft (43) is connected between the single fan blades (34) and the bearing ring (42), and when the bearing ring (42) is close to the limiting ring layers (331) on both sides, the inclination degree of the single fan blades (34) is adjusted; The single fan blade (34) comprises a sheet-shaped blade (341), a circular hole (45) is opened on an inner side corner of the sheet-shaped blade (341), the L-shaped shaft (43) is fixed to the bearing ring (42), a circular end (44) is fixed to the outer end of the L-shaped shaft (43), the circular end (44) is embedded in the circular hole (45), and the circular end (44) is rotatable in the circular hole (45); The outer side of the fixing plate (32) is provided with a plurality of circumferentially distributed snap-in openings (321); the single wind blade (34) further comprises a snap-in block (344) and a deformation layer (35); the snap-in block (344) is fixed in the snap-in opening (321); the outer side of the snap-in block (344) is rotatably connected to the sheet-like leaf (341), so that the sheet-like leaf (341) can be rotated to different degrees of inclination; The sheet-like leaf (341) is provided with a rectangular opening (342), and the deformation layer (35) is installed in the rectangular opening (342); The deformation layer (35) comprises two groups of symmetrical sleeve layers 1 (351) and sleeve layers 2 (352); the sleeve layers 1 (351) and sleeve layers 2 (352) are sleeved together and can be deformed by telescoping; the sleeve layers 2 (352) in the two groups are hinged to each other; and the outer edges of the sleeve layers 1 (351) in the two groups are rotatably connected to the rectangular opening (342).

2. The reversible air supply fan according to claim 1, characterized in that: A fastening bolt (41) is threadedly connected to the U-shaped frame (4), and the outer end of the fastening bolt (41) abuts against the inner wall of the outer shell (1) to adjust whether the U-shaped frame (4) is fastened.

3. The reversible air supply fan according to claim 1, characterized in that: The first sleeve layer (351) and the second sleeve layer (352) are both made of flat metal.

4. The reversible air supply fan according to claim 1, characterized in that: An outer blocking layer (343) is fixed to the inner walls on both sides of the rectangular opening (342), and the side edge of the deformation layer (35) is in contact with the outer blocking layer (343) to block the airflow.

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