Air inlet connecting structure of centrifugal fan

Abstract

According to the centrifugal fan air inlet connecting structure, a telescopic plate is clamped in a connecting groove so as to achieve connection of an air inlet plate and an air inlet, external air enters a fan volute through an air inlet groove in the surface of the air inlet plate, and therefore operation of a fan is completed; the telescopic plate is connected with the air inlet plate through the first spring, so that the telescopic plate can be pressed to be contracted to the air inlet plate so as to conveniently take out the air inlet plate, the air inlet plate is convenient to mount and dismount, and the air inlet efficiency of the fan volute can be controlled through the adjusting plate.

Description

Technical Field

[0001] This application relates to the technical field of centrifugal fan equipment, and particularly to a connection structure for the air inlet of a centrifugal fan. Background Art

[0002] A centrifugal fan is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine. Centrifugal fans are widely used in ventilation, dust removal, and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings; ventilation and induced draft in boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household electrical appliances, etc.

[0003] A centrifugal fan works based on the principle of converting kinetic energy into potential energy. It uses a high-speed rotating impeller to accelerate the gas, and then decelerates and changes the flow direction to convert the kinetic energy into potential energy (pressure). In a single-stage centrifugal fan, the gas enters the impeller axially, changes to a radial direction when flowing through the impeller, and then enters the diffuser. In the diffuser, the gas changes the flow direction and the cross-sectional area of the pipeline increases to decelerate the air flow. This deceleration effect converts the kinetic energy into pressure energy. The pressure increase mainly occurs in the impeller and secondly in the diffusion process. In a multi-stage centrifugal fan, a return device is used to make the air flow enter the next impeller to generate a higher pressure.

[0004] An air inlet plate is generally provided at the air inlet of a centrifugal fan, so that the outside can enter the centrifugal fan through the air inlet plate. However, the air inlet plate provided at the air inlet of the existing centrifugal fan is difficult to disassemble after installation. If the air inlet plate is damaged, it is difficult to replace. Summary of the Utility Model

[0005] Based on this, in view of the problem that the air inlet plate provided at the air inlet of the existing centrifugal fan is difficult to disassemble after installation and it is difficult to replace if the air inlet plate is damaged, it is necessary to provide a connection structure for the air inlet of a centrifugal fan.

[0006] This application provides a connection structure for the air inlet of a centrifugal fan, including:

[0007] A fan volute, which is provided with an air inlet;

[0008] A connection assembly, which includes an air inlet plate, a telescopic plate, a first spring, and a connection groove. One end of the first spring is fixedly connected to the top surface of the air inlet plate, one end of the telescopic plate is fixedly connected to the other end of the first spring, the connection groove is opened on the top surface of the air inlet, and the other end of the telescopic plate is clamped in the connection groove;

[0009] An adjustment component, the adjustment component includes an adjustment plate, a connecting shaft, an air inlet slot and a matching hole, one end of the connecting shaft is rotatably connected to the side wall of the air inlet plate, the other end of the connecting shaft is fixedly connected to the side wall of the adjustment plate, the air inlet slot is opened on the side wall of the air inlet plate, and the matching hole is opened on the side wall of the adjustment plate.

[0010] The present application relates to an air inlet connection structure for a centrifugal fan, in which a telescopic plate is clamped in a connecting groove to realize the connection between the air inlet plate and the air inlet, and the outside air enters the fan volute through the air inlet groove on the surface of the air inlet plate, thereby completing the operation of the fan, and the air intake efficiency of the air inlet plate is controlled by adjusting the distance between the air inlet plate and the adjustment plate. Since the telescopic plate is connected to the air inlet plate by a first spring, the telescopic plate can be pressed so that the telescopic plate is contracted to the air inlet plate to facilitate the removal of the air inlet plate. The air inlet plate of the present application is easy to install and disassemble, and the air intake efficiency of the fan volute can also be controlled by the adjustment plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic structural diagram of a centrifugal fan air inlet connection structure provided in one embodiment of the present application.

[0012] Figure 2 A schematic diagram of the connection between an air inlet plate and an adjustment plate of an air inlet connection structure of a centrifugal fan provided in one embodiment of the present application.

[0013] Figure 3 A schematic structural diagram of an air inlet plate of an air inlet connection structure of a centrifugal fan provided in one embodiment of the present application.

[0014] Figure 4 A schematic diagram of the connection relationship between an inner plate and a telescopic plate of an air inlet connection structure of a centrifugal fan provided in one embodiment of the present application.

[0015] Figure 5 A schematic structural diagram of a fan volute of a centrifugal fan air inlet connection structure provided in one embodiment of the present application.

[0016] Reference numerals:

[0017] 100, fan volute; 101, air inlet; 102, groove; 200, connecting component; 201, air inlet plate;

[0018] 202, telescopic plate; 203, telescopic slot; 204, first spring; 205, connecting slot; 206, outer plate;

[0019] 207, inner plate; 208, second spring; 209, rotating groove; 300, adjusting assembly; 301, adjusting plate; 302, connecting shaft; 303, air inlet groove; 304, matching hole. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions, and advantages of the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] The present application provides a connection structure for the air inlet of a centrifugal fan.

[0022] As Figure 1 、 Figure 2 and Figure 3 shown, in an embodiment of the present application, the connection structure of the air inlet 101 of the centrifugal fan includes a fan volute 100, a connection assembly 200, and an adjustment assembly 300.

[0023] The fan volute 100 is provided with an air inlet 101. The connection assembly 200 includes an air inlet plate 201, a telescopic plate 202, a first spring 204, and a connection groove 205. One end of the first spring 204 is fixedly connected to the top surface of the air inlet plate 201, one end of the telescopic plate 202 is fixedly connected to the other end of the first spring 204, the connection groove 205 is opened on the top surface of the air inlet 101, and the other end of the telescopic plate 202 is snap-fitted into the connection groove 205. The adjustment assembly 300 includes an adjustment plate 301, a connection shaft 302, an air inlet groove 303, and an alignment hole 304. One end of the connection shaft 302 is rotatably connected to the side wall of the air inlet plate 201, the other end of the connection shaft 302 is fixedly connected to the side wall of the adjustment plate 301, the air inlet groove 303 is opened on the side wall of the air inlet plate 201, and the alignment hole 304 is opened on the side wall of the adjustment plate 301.

[0024] In this embodiment, the connection between the air inlet plate 201 and the air inlet 101 is achieved by snap-fitting the telescopic plate 202 into the connection groove 205. External air enters the fan volute 100 through the air inlet groove 303 on the surface of the air inlet plate 201, thereby completing the operation of the fan. By adjusting the distance between the air inlet plate 201 and the adjustment plate 301, the air intake efficiency of the air inlet plate 201 can be controlled. Since the telescopic plate 202 is connected to the air inlet plate 201 through the first spring 204, the telescopic plate 202 can be pressed, so that the telescopic plate 202 contracts into the air inlet plate 201 to facilitate the removal of the air inlet plate 201. The air inlet plate 201 of the present application is convenient for installation and disassembly, and the air intake efficiency of the fan volute 100 can also be controlled through the adjustment plate 301.

[0025] As Figure 3 shown, in an embodiment of the present application, the air inlet plate 201 includes an outer plate 206, a plurality of inner plates 207, and a plurality of second springs 208. The inside of the outer plate 206 is hollow, each inner plate 207 is slidably connected to the outer plate 206, and at least one second spring 208 is fixedly connected between each inner plate 207 and the outer plate 206.

[0026] In this embodiment, the inner plate 207 slides in the outer plate 206 to adjust the position of the outer plate 206 so that the telescopic plate 202 can be snapped into the telescopic groove 203 , thereby fixing the air inlet plate 201 in the air inlet 101 .

[0027] Before the air inlet plate 201 is placed into the air inlet 101, the telescopic plate 202 is retracted into the telescopic groove 203, and the inner plate 207 is retracted toward the center of the outer plate 206, thereby reducing the diameter of the air inlet plate 201 so that the air inlet plate 201 can be placed into the air inlet 101. After the air inlet plate 201 is placed into the air inlet 101, under the action of the second spring 208, the inner plate 207 will move in a direction away from the center of the outer plate 206, so that the outer plate 206 is snapped into the groove 102 of the air inlet 101, thereby preliminarily realizing the connection between the air inlet plate 201 and the air inlet 101. When the telescopic groove 203 is aligned with the connecting groove 205, the telescopic plate 202 will pop out from the telescopic groove 203 under the action of the first spring 204, so that the telescopic plate 202 is snapped into the connecting groove 205, and the air inlet plate 201 is fixed again.

[0028] like Figure 4 As shown, in one embodiment of the present application, a telescopic slot 203 is opened on the top surface of the inner plate 207, one end of the first spring 204 is fixedly connected to the slot wall of the telescopic slot 203, and the telescopic slot 203 is slidably connected to the telescopic slot 203 through the first spring 204.

[0029] Specifically, when the air inlet plate 201 is connected to the air inlet 101 , the expansion slot 203 and the connection slot 205 are located on the same straight line.

[0030] In this embodiment, when connecting the air inlet plate 201 and the air inlet 101, the telescopic plate 202 is first retracted into the retraction groove so that the inner plate 207 can smoothly enter the groove 102. After the inner plate 207 is docked with the groove 102, under the action of the first spring 204, the telescopic plate 202 will pop out from the telescopic groove 203, and the telescopic plate 202 will be clamped in the connecting groove 205, so that the connection between the air inlet plate 201 and the air inlet 101 is more stable.

[0031] When the air inlet plate 201 needs to be removed, it is only necessary to press the telescopic plate 202 to retract the telescopic plate 202 into the telescopic slot 203 , and then the air inlet plate 201 can be moved to remove the air inlet plate 201 from the air inlet port 101 .

[0032] like Figure 5As shown, in an embodiment of the present application, a groove 102 is provided in the air inlet 101. The width of the groove 102 is equal to the width of the inner plate 207, and the bottom surface of the connection groove 205 communicates with the groove 102.

[0033] In this embodiment, the inner plate 207 is fixed by the groove 102. The reason for setting the width of the groove 102 equal to the width of the inner plate 207 is to improve the tightness of the connection between the inner plate 207 and the groove 102, thereby improving the stability of the connection between the air inlet plate 201 and the air inlet 101.

[0034] Since the bottom surface of the connection groove 205 communicates with the groove 102, after the inner plate 207 is connected, the telescopic plate 202 can directly pass through the groove 102 and be snap-fitted into the connection groove 205.

[0035] As Figure 2 shown, in an embodiment of the present application, a plurality of alignment holes 304 are provided, and a plurality of air inlet grooves 303 are provided.

[0036] In this embodiment, outside air enters the fan volute 100 through the air inlet grooves 303. The plurality of air inlet grooves 303 increase the total amount of air entering the fan volute 100 per unit time.

[0037] Due to the presence of the adjusting plate 301, the opening and closing of the air inlet grooves 303 can be controlled, thereby controlling the efficiency of the air entering the fan.

[0038] When it is necessary to increase the air intake efficiency, rotate the connecting shaft 302 so that the adjusting plate 301 moves away from the air inlet plate 201, thereby increasing the air intake efficiency of the air inlet plate 201. When it is necessary to reduce the air intake efficiency, rotate the connecting shaft 302 in the opposite direction so that the adjusting plate 301 approaches the air inlet plate 201, thereby closing the air inlet plate 201 to reduce the air intake efficiency of the air inlet plate 201.

[0039] Due to the presence of the alignment holes 304, a small amount of air can still pass through the alignment holes into the fan volute 100 when the adjusting plate 301 is in contact with the air inlet plate 201, thereby maintaining the normal operation of the fan.

[0040] As Figure 3 shown, in an embodiment of the present application, a plurality of inner plates 207 are provided, and the plurality of inner plates 207 are circumferentially and uniformly arranged around the center of the outer plate 206.

[0041] In this embodiment, the position of the inner plate 207 is adjusted so that the air inlet plate 201 can be fixed in the air inlet 101.

[0042] The position of each inner plate 207 can be adjusted individually.

[0043] As Figure 2As shown, in an embodiment of the present application, a rotation groove 209 is formed in the outer wall of the outer plate 206, and one end of the connecting shaft 302 is rotatably connected to the rotation groove 209.

[0044] Specifically, the diameter of the connecting shaft 302 is equal to the diameter of the rotation groove 209.

[0045] In this embodiment, by rotating the connecting shaft 302 in the rotation groove 209, the adjusting plate 301 is driven to rotate, thereby adjusting the distance between the air inlet plate 201 and the adjusting plate 301.

[0046] As Figure 5 shown, in an embodiment of the present application, the telescopic plate 202 is slidably connected to the connecting groove 205, multiple telescopic plates 202 are provided, and the number of the telescopic plates 202 is equal to the number of the connecting grooves 205.

[0047] In this embodiment, the telescopic plate 202 is fixed by the connecting groove 205. At least one telescopic plate 202 is fixedly connected in each connecting groove 205, and multiple connecting grooves 205 can fix multiple telescopic plates 202, thereby improving the connection stability between the air inlet plate 201 and the blower volute 100.

[0048] As Figure 1 shown, in an embodiment of the present application, multiple connecting grooves 205 are provided, and the multiple connecting grooves 205 are circumferentially arranged around the center of the air inlet 101.

[0049] In this embodiment, by circumferentially arranging the multiple connecting grooves 205, the connecting grooves 205 cooperate with the telescopic plates 202 to apply pressure to the air inlet plate 201 from different directions, thereby maintaining the stability of the air inlet plate 201.

[0050] As Figure 1 shown, in an embodiment of the present application, both the adjusting plate 301 and the air inlet plate 201 are disc-shaped, and the adjusting plate 301 and the air inlet plate 201 are coaxially arranged.

[0051] In this embodiment, since the intake efficiency is adjusted by rotating the adjusting plate 301, the diameter of the adjusting plate 301 is set to be larger than the diameter of the air inlet plate 201, so that the adjusting plate 301 can completely cover the air inlet part, thereby avoiding the appearance of shielding dead angles.

[0052] The technical features of the above-described embodiments can be combined arbitrarily, and there is no limitation on the execution order of the method steps. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0053] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A centrifugal fan air inlet connection structure, characterized in that: The centrifugal fan air inlet connection structure comprises: A fan volute, wherein the fan volute is provided with an air inlet; A connecting assembly, the connecting assembly comprising an air inlet plate, a telescopic plate, a first spring and a connecting groove, one end of the first spring being fixedly connected to the top surface of the air inlet plate, one end of the telescopic plate being fixedly connected to the other end of the first spring, the connecting groove being opened on the top surface of the air inlet, and the other end of the telescopic plate being clamped in the connecting groove; An adjustment component, the adjustment component includes an adjustment plate, a connecting shaft, an air inlet slot and a matching hole, one end of the connecting shaft is rotatably connected to the side wall of the air inlet plate, the other end of the connecting shaft is fixedly connected to the side wall of the adjustment plate, the air inlet slot is opened on the side wall of the air inlet plate, and the matching hole is opened on the side wall of the adjustment plate.

2. The centrifugal fan air inlet connection structure according to claim 1, characterized in that: The air inlet plate includes an outer plate, a plurality of inner plates and a plurality of second springs. The interior of the outer plate is hollow. Each inner plate is slidably connected to the outer plate. At least one second spring is fixedly connected between each inner plate and the outer plate.

3. The centrifugal fan air inlet connection structure according to claim 2, characterized in that: A telescopic slot is provided on the top surface of the inner plate, one end of the first spring is fixedly connected to the slot wall of the telescopic slot, and the telescopic slot is slidably connected to the telescopic slot through the first spring.

4. The centrifugal fan air inlet connection structure according to claim 3, characterized in that: The air inlet is provided with a groove, the width of the groove is equal to the width of the inner plate, and the bottom surface of the connecting groove is connected to the groove.

5. The centrifugal fan air inlet connection structure according to claim 4, characterized in that: The pair of holes is provided in plurality, and the air inlet slot is provided in plurality.

6. The centrifugal fan air inlet connection structure according to claim 5, characterized in that: There are multiple inner plates, and the multiple inner plates are evenly arranged in the circumferential direction around the center of the outer plate.

7. The centrifugal fan air inlet connection structure according to claim 6, characterized in that: The outer wall of the outer plate is provided with a rotation groove, and one end of the connecting shaft is rotatably connected to the rotation groove.

8. The centrifugal fan air inlet connection structure according to claim 7, characterized in that: The telescopic plate is slidably connected to the connecting groove, and a plurality of the telescopic plates are provided, and the number of the telescopic plates is equal to the number of the connecting grooves.

9. The centrifugal fan air inlet connection structure according to claim 8, characterized in that: There are multiple connecting grooves, and the multiple connecting grooves are circumferentially arranged about the center of the air inlet.

10. The centrifugal fan air inlet connection structure according to claim 9, characterized in that: The regulating plate and the air inlet plate are both in a circular pancake shape, and the regulating plate and the air inlet plate are coaxially arranged.

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