Impeller for ventilator of ventilation facility

Abstract

The present invention relates to an impeller for generating wind power, which is installed in a ventilator used in a ventilation facility, and more particularly, to an impeller for generating wind power, which can improve air blowing efficiency by using airfoil-shaped blades, and which can be easily manufactured by fastening the blades using bolts and rivets at the same time during coupling. And the fixing force of the blades can be maintained even when the impeller is driven for a long time. To this end, the present invention comprises: a pair of outer fixing plates formed in the form of a circular plate; and a plurality of blades provided along the outer periphery in a space between the outer fixing plates to generate air blowing, the outer fixing plates including: a support plate connected to the motor to support the blades; and a hollow plate which is provided at a predetermined interval from the support plate and in which the blades are coupled in a space between the hollow plate and the support plate, in which a plurality of blade coupling holes are formed at the positions where the blades are coupled.

Description

Technical Field

[0001] This invention relates to an impeller for generating airflow in a ventilator installed in a ventilation system, and more specifically, to an impeller for a ventilation system ventilator that can improve airflow efficiency by utilizing airfoil-shaped blades and is fastened by bolts and rivets at the same time during assembly, thereby being easy to manufacture and maintaining the fixing force of the blades even during long-term operation. Background Technology

[0002] Typically, ventilators can force airflow through a rotating blade or impeller structure, and are used for various purposes such as ventilation in commercial facilities like residential buildings or restaurants, or for ventilation or forced airflow in parking lots and industrial areas of buildings.

[0003] In particular, the impeller-structured fan has multiple cylindrical blades and is driven centrifugally, which draws in outside air into the center and exhausts it outward through the blades as it rotates.

[0004] When manufacturing this impeller, a blocked disc is used on one side and a centrally through-type disc is used on the other side. When rotating, air flows into the through-type part and is then delivered to the side through the blades.

[0005] However, it basically uses a structure formed by the shape of a thin plate with an impeller, so the air delivery efficiency is poor and it will generate noise when driven.

[0006] In addition, since the disk and blades are joined by welding, the welded parts are uneven, which causes problems such as vibration and noise due to the difference in the overall center of gravity.

[0007] In this regard, in existing document 1 (registered patent 10-2207994 Impeller manufacturing method and impeller blade manufacturing method thereof), a structure is disclosed in which airfoil-shaped blades are extruded into long strips, then cut into predetermined lengths, and assembled by bolts.

[0008] However, since existing literature 1 only uses bolts for fastening, the fixing force of the blades will decrease as the bolts loosen during long-term use, resulting in a decrease in air supply efficiency and noise caused by the gaps in the loose parts.

[0009] Existing technical documents

[0010] Patent documents

[0011] (Patent Document 0001) Existing Document 1 (Registered Patent 10-2207994 Impeller Manufacturing Method and Impeller Blade Manufacturing Method Therefor). Summary of the Invention

[0012] The problem that the invention aims to solve

[0013] The present invention is proposed to solve the above-mentioned problems, and its purpose is to provide an impeller for a ventilation fan, wherein the impeller for the ventilation fan uses both bolts and rivets when assembling the outer fixing plate and blades, thereby maintaining the fixing force during long-term use.

[0014] In addition, the objective is to provide an impeller for a ventilation fan, wherein the impeller adopts airfoil-shaped blades to improve air delivery efficiency and minimize noise caused by air resistance.

[0015] In addition, the objective is to provide an impeller for a ventilation fan, wherein the blades can be quickly and easily fixed to the joint position by riveting, thereby facilitating bolt fastening and ease of manufacture.

[0016] Problem-solving methods

[0017] To address the aforementioned problems, an impeller for a ventilation fan according to an embodiment of the present invention is characterized in that the impeller comprises: a pair of outer fixed plates formed in a circular plate shape; blades, wherein a plurality of blades are arranged around the outer periphery in the space between the outer fixed plates to generate airflow; the outer fixed plates comprising: a support plate connected to a motor to support the blades; and a hollow plate spaced apart from the support plate at a predetermined interval, wherein the blades are engaged in the space between the hollow plate and the support plate; and a plurality of blade engagement holes are formed in the outer fixed plates at the blade engagement positions.

[0018] The blade assembly hole is characterized by including: a riveting hole formed on both sides of the blade, which is connected to the outer fixing plate by riveting; and a bolt through hole provided on both sides of the riveting hole, which is fastened by bolts.

[0019] At this time, the blade is characterized by having a wide section on one side and a narrow section on the other side, thus forming an airfoil shape. It includes rivet fastening holes formed at positions matching the rivet holes and bolt fastening holes formed at positions matching the bolt through holes. The midpoint of the blade is joined by riveting, and its two sides are fastened by bolts.

[0020] Invention Effects

[0021] According to an embodiment of the present invention, the impeller for a ventilation fan of a ventilation facility uses both bolt connection and riveting to connect the blades to the outer fixing plate, thus preventing poor connection due to the fixing force of the riveting even during long-term use.

[0022] In addition, by using riveting to fix the blade to the outer fixing plate first, and then tightening the bolts while the outer fixing plate and the blade are fixed, it has the effect of easy tightening and shortening the manufacturing time required.

[0023] In addition, the airfoil-shaped blades improve air delivery efficiency and minimize noise. Attached Figure Description

[0024] Figure 1 This is an exploded perspective view of an impeller for a ventilation fan according to an embodiment of the present invention.

[0025] Figure 2 This is an overall perspective view showing the assembled state of the impeller for a ventilation fan in a ventilation system according to an embodiment of the present invention.

[0026] Figure 3 This is a cross-sectional view showing the assembly state of the outer fixing plate and blades in an impeller for a ventilation fan according to an embodiment of the present invention.

[0027] Figure 4 This is an embodiment diagram showing the state in which the impeller of the ventilation fan according to the first embodiment of the present invention also has a blade pre-assembly portion.

[0028] Figure 5 This is an embodiment diagram showing the state in which resistance dispersion grooves are formed on the blades of an impeller for a ventilation fan according to a second embodiment of the present invention.

[0029] Figure 6 This is an embodiment diagram of a ventilation fan impeller according to a third embodiment of the present invention, showing a flow-type guide vane that flows by rotational centrifugal force. Detailed Implementation

[0030] This invention relates to impellers for ventilators, particularly those with airfoil-shaped blades that minimize air resistance during rotation, thereby improving air delivery efficiency. The impellers also feature improved durability due to the use of riveting and bolting connections, ensuring a fixed position even during prolonged use, and minimizing noise caused by poor fitment.

[0031] Hereinafter, the impeller for a ventilation fan according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

[0032] Figure 1 This is an exploded perspective view of an impeller for a ventilation fan according to an embodiment of the present invention. Figure 2 This is an overall perspective view showing the assembled state of the impeller for a ventilation fan in a ventilation system according to an embodiment of the present invention.

[0033] Reference Figure 1 and Figure 2 The present invention comprises a pair of outer fixing plates 100 and blades 300. The pair of outer fixing plates 100 are formed in a circular plate shape. Multiple blades 300 are arranged in a unidirectional inclined manner along the outer periphery of the space between the outer fixing plates 100 so as to generate air supply by rotation.

[0034] The outer fixing plate 100 comprises a support plate 110 and a hollow plate 120. The support plate 110 has a motor connection part 111 that is connected to the motor and rotates with the motor M to support the blade 300. The hollow plate 120 is disposed on the other side of the support plate 110 with reference to the installation position of the blade 300, and has an air inlet hole 121 for air to flow in.

[0035] At this time, blade connecting holes 130 are formed on the support plate 110 and the hollow plate 120, which are connected to the blades 300 around the outer periphery. The blade connecting holes 130 are formed side by side to form the same inclination, so that they are connected in the same inclination shape at a predetermined angle, so that the blades induce airflow when rotating, and airflow is generated by centrifugal force.

[0036] On the other hand, the blade coupling hole 130 includes three blade coupling holes 130 that are coupled to one blade 300, and a riveting hole 131 is formed at the middle position of the three blade coupling holes 130, which can be used to join the outer fixing plate 100 and the blade 300 by riveting.

[0037] Additionally, bolt through holes 132 are formed on both sides of the rivet hole 131, which can be used to fasten the two sides of the blade 300 and the outer fixing plate 100 together by bolts.

[0038] Therefore, when the outer fixing plate 100 and the blade 300 are combined, the bolts can be tightened to a simple and accurate position by using the bolt through holes 132 on both sides while the fixing is using the rivet holes 131. This makes the combination operation of the outer fixing plate 100 and the blade 300 easier.

[0039] At this time, the blade 300 is configured to form a streamlined airfoil shape. When combined with the outer fixing plate 100, the inner end forms a wide, rounded portion 310, and the outer end forms a thin, pointed, narrow portion 320.

[0040] In addition, the blade 300 is made of thin aluminum to reduce weight, but due to insufficient strength, it may deform or be damaged when subjected to impact.

[0041] Therefore, reinforcing ribs 330 can be formed on the inner circumferential surface of the blade 300 to prevent damage to the blade 300.

[0042] At this time, the reinforcing rib 330 can be formed into the inner space of the blade 300 to avoid being affected by air, and is formed to extend in the rotation path direction of the easily deformable resistance part, thereby effectively preventing the deformation of the blade 300.

[0043] Additionally, at the end where the blade 300 is joined to the outer fixing plate 100, there is a bolt fastening hole 340 for fastening bolts through the bolt through hole 132, and a rivet fastening hole 350 for rivets to pass through the rivet hole 131 of the outer fixing plate 100 and to rivet and fix the outer fixing plate 100 and the blade 300.

[0044] Therefore, the outer fixing plate 100 and the blade 300 can be easily and quickly combined. The blade 300 can improve air supply efficiency and minimize the noise generated during drive.

[0045] Figure 3 This is a cross-sectional view showing the assembly state of the outer fixing plate and blades in an impeller for a ventilation fan according to an embodiment of the present invention.

[0046] Reference Figure 3 When the outer fixing plate 100 and the blade 300 are in a state of mutual alignment at the joint, the riveting operation is first performed, that is, the rivet is inserted into the riveting hole 131 of the upper outer fixing plate 100, thereby passing through the rivet fastening hole 350 formed in the blade 300, and then passing through the rivet hole 131 formed in the lower outer fixing plate 100.

[0047] Therefore, the outer fixing plate 100 and the blade 300 are held in the joint position by riveting. Bolts are inserted into the bolt through holes 132 formed in the outer fixing plate 100, and bolts are tightened in both directions to the bolt fastening holes 340 formed in the blade, so that the outer fixing plate 100 and the blade 300 can be completely joined.

[0048] Therefore, the outer fixing plate 100 and the blade 300 can be easily combined, and even if the outer fixing plate 100 and the blade 300 are fixed by bolts and the bolts loosen due to vibration generated during driving, the fixing state can be maintained by rivets to improve durability.

[0049] Figure 4 This is an embodiment diagram showing the state in which the impeller of the ventilation fan according to the first embodiment of the present invention also has a blade pre-assembly portion.

[0050] Reference Figure 4The present invention can form a blade pre-assembly part 140 at the part where the outer fixing plate 100 and the blade 300 are joined together.

[0051] The blade pre-assembly part 140 is configured to protrude from the outer fixing plate 100 toward the inner side of the blade 300 in a shape corresponding to the hollow part of the blade 300. The assembly part can be made to protrude by sheet metal during the manufacturing of the outer fixing plate, or the blade pre-assembly part can be set separately after manufacturing.

[0052] At this time, a buffer coating portion 141 made of a soft material such as silicon can be formed in the blade pre-assembly portion 140 to make the bonding state more solid and to prevent noise.

[0053] The buffer coating 141, while ensuring the connection between the blade 300 and the outer fixing plate 100, also provides elastic support, thereby preventing the bolts from loosening during use and preventing noise caused by vibration during rotation.

[0054] Figure 5 This is an embodiment diagram showing the state in which resistance dispersion grooves are formed on the blades of an impeller for a ventilation fan according to a second embodiment of the present invention.

[0055] Reference Figure 5 A drag dispersion groove 360 ​​can be formed on the outer surface of the blade 300 to disperse air resistance and thus improve rotational efficiency.

[0056] The resistance dispersion groove 360 ​​is formed in the shape of a groove on the outer side of the blade 300 along the direction of rotation of the blade 300. It can disperse the air resistance during rotation, and improve the rotation efficiency as the resistance is reduced.

[0057] In addition, the resistance dispersion groove 360 ​​is formed in the shape of a groove, but a rounded corner 361 is formed at the boundary with the outer surface of the blade 300, so that the influence can be minimized even in the direction of airflow, while achieving stable rotation.

[0058] Figure 6 This is an embodiment diagram of a ventilation fan impeller according to a third embodiment of the present invention, showing a flow-type guide vane that flows by rotational centrifugal force.

[0059] Reference Figure 6 The blade 300 may also have a flow-type guide vane 370, which enables the blade 300 to flow through the centrifugal force of rotation, thus overcoming the air resistance caused by the rotation speed and achieving stable rotation.

[0060] The flow-type guide vane 370 has a flow hinge 371 that allows the flow-type guide vane 370 to be rotatably mounted on a curved surface portion between the wide portion 310 and the narrow portion 320 of the blade 300, thereby allowing it to be rotatably mounted via the flow hinge 371.

[0061] In addition, the flow hinge 371 may also have an anti-collision elastomer 372, which can prevent noise from being generated as the flow guide vane 370 collides with the back side of the blade 300.

[0062] The anti-collision elastomer 372 may be a torsion spring and support the flow-type guide vane 370 so that it is separated from the blade 300.

[0063] Therefore, when the blade rotates, the flow-type guide vane 370 is deployed. While maintaining the stable rotation of the blade 300, it prevents the flow-type guide vane 370 from colliding with the blade 300 during flow due to speed changes or air resistance, thereby preventing noise caused by the collision.

[0064] On the other hand, the flow-type guide vane 370 can form an outward curved surface 373 at the flow point at the rear of the rotation direction, which forms a curved surface facing outward.

[0065] The outward curved surface 373 can make the blade 300 fit inwards. Even if the bolt fastening hole 340 becomes unsound due to long-term use, the blade 300 can still fit inwards towards the rear end as it rotates with the midpoint of the riveting as a reference.

[0066] Therefore, flow noise caused by poor tightening of bolt fastening holes 340 can be prevented, and rotational efficiency can be optimized even under poor tightening conditions.

[0067] As described above, the present invention forms the blades in an airfoil shape in the impeller that generates airflow by rotation in a ventilator, thereby improving rotation efficiency. Furthermore, when the blades are attached to the outer fixing plate, the middle point is fixed by riveting, and bolts are tightened on both sides to prevent the outer fixing plate from separating from the blades due to poor bolt tightening. This also minimizes noise during rotation.

[0068] Figure Labels

[0069] 100: Outer fixing plate; 110: Support plate

[0070] 111: Motor connection part; 120: Hollow plate

[0071] 121: Air inlet hole; 130: Blade joint hole

[0072] 131: Riveting hole; 132: Bolt through hole

[0073] 140: Blade pre-assembly section; 141: Buffer coating section

[0074] 300: Blade; 310: Wide section

[0075] 320: Narrow section; 330: Reinforcing ribs

[0076] 340: Bolt fastening hole; 350: Rivet fastening hole

[0077] 360: Resistance dispersion groove; 361: Rounded corner.

[0078] 370: Flow-type guide vane; 371: Flow hinge

[0079] 372: Anti-collision elastomer; 373: Outward curved surface.

Claims

1.A fan wheel for a ventilation fan of a ventilation facility, characterized in that the fan wheel for the ventilation fan of the ventilation facility comprises: a pair of outer fixing plates (100) formed in a circular plate shape; a plurality of blades (300) disposed along the outer periphery in a space between the outer fixing plates to generate a supply air, the outer fixing plate (100) comprises a support plate (110) connected to a motor (M) to support the blades (300), and a hollow plate (120) disposed apart from the support plate (110) by a predetermined interval and having the blades (300) combined in a space between the hollow plate and the support plate (110), a plurality of blade combination holes (130) are formed in the outer fixing plate (100) at positions where the blades (300) are combined. 2.The fan wheel for the ventilation fan of the ventilation facility according to claim 1, characterized in that the blade combination hole (130) comprises a rivet hole (131) formed on both sides of the blade (300) to be combined with the outer fixing plate (100) by riveting, and a bolt through hole (132) disposed on both sides of the rivet hole (131) to be combined by bolt fastening. 3.The fan wheel for the ventilation fan of the ventilation facility according to claim 2, characterized in that the blade (300) has a wide width on one side and a narrow width on the other side to form a wing type shape as a whole, includes a rivet fastening hole (350) formed at a position matching the rivet hole (131) and a bolt fastening hole (340) formed at a position matching the bolt through hole (132), and is combined by riveting at a middle point and by bolt fastening at both sides.

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