Energy-saving centrifugal fan with impurity filtering function

Abstract

The invention relates to the field of centrifugal fans, and discloses an energy-saving centrifugal fan with an impurity filtering function, which comprises a shell, the shell is volute-shaped, one side of the shell is provided with a filter element assembly, the filter element assembly is used for placing and replacing a filter screen, and the filter element assembly is located on the outer side of an air inlet of the shell. An impeller assembly is arranged at the position, located on one side of the filter element assembly, of the interior of the shell, the impeller assembly is used for providing wind power and changing the air volume, and the shell compresses and fixes related assemblies in the filter element assembly through a part at the air inlet and the shell; according to the energy-saving centrifugal fan with the impurity filtering function, the filter element assembly is arranged, a filter screen meeting different requirements can be conveniently replaced, and on one hand, impurities in the previous environment can be prevented from being brought into the new environment by the fan; and on the other hand, the service life of the filter screen can be prolonged, the filtering effect is ensured to reach the standard, and unnecessary damage or overweight load to the filter screen can be prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal fans, and particularly to an energy-saving centrifugal fan with an impurity filtering function. Background Art

[0002] In the patent application with the application publication number CN222025986U, it includes a base, and a fan is fixedly installed on the top of the base; a limiting component, which is arranged inside the fan. The limiting component includes a limiting groove, and a limiting block is slidably connected inside the limiting groove; a fixing groove, which is arranged inside the fan, and a fixing pin is slidably connected inside the fixing groove. One end of the fixing pin and inside the fixing groove is provided with a fixing spring, and a fixing ring is fixedly connected to one side of the fixing pin. A fixing hole adapted to the fixing pin is opened inside the limiting block; a filter screen, which is arranged inside the fan. The advantages are as follows: By pressing the fixing ring to one side to drive the four fixing pins to separate from the four fixing holes, then rotating the filter screen to one side to drive the limiting component to rotate to a suitable position, and then pulling the filter screen to one side to drive the limiting component to separate, the filter screen can be disassembled, so as to conveniently and quickly disassemble the filter screen for cleaning or replacement.

[0003] In the prior art including the above patents, most improvements are made on the impurity filtering and dust prevention effects of fixed fans, and fixed centrifugal fans are mostly used for exhaust in factories, air conditioners and other factory buildings or large equipment. However, for mobile centrifugal fans, their usage environments are variable, and the maintenance frequency and maintenance quality are both lower than those of fixed fans to varying degrees. Therefore, the components inside the mobile fan will not only cause the impeller to wear faster due to different working environments, thus making it inconvenient to reduce the maintenance frequency, but also bring impurities from other working environments when discharging air to the current working environment, and thus it is inconvenient to reduce the impact of the fan on the working environment. Summary of the Invention

[0004] The problem to be solved by the present invention is that the existing small mobile centrifugal fans are not convenient to adapt to different working environments.

[0005] To solve the above technical problems, the technical solution of the present invention is: An energy-saving centrifugal fan with an impurity filtering function, including a housing, the housing is arranged in a volute shape, one side of the housing is provided with a filter element assembly for placing and replacing the filter screen, the filter element assembly is located outside the air inlet of the housing, and inside the housing on one side of the filter element assembly is provided with an impeller assembly for providing wind power and changing the air volume, and the housing presses and fixes the relevant components in the filter element assembly through the components at the air inlet and the housing itself.

[0006] Preferably, the filter element assembly includes a mounting plate, which is composed of two semi-circular plates. The mounting plates are connected by screws. The outer surface of the mounting plate is fixedly provided with mounting blocks. There are four groups of mounting blocks evenly distributed around the center of the mounting plate. Each group has two mounting blocks, and the mounting blocks are triangularly arranged.

[0007] Preferably, elastic components are fixedly arranged inside both sides of the mounting block. On the opposite sides of the elastic components, there is a mounting box fixedly arranged. The mounting box is divided into upper and lower layers. The lower layer of the mounting box is fixedly connected to the elastic component. The upper and lower layers of the mounting box are connected by a hinge. At one end of the mounting box away from the hinge inside, there is a magnet fixedly arranged, and the magnet is used to prevent the mounting box from accidentally opening.

[0008] Preferably, a filter screen is arranged in the middle of the mounting box. On the inner side of the mounting plate and outside the air inlet component of the housing, there is a sliding limit block. The limit block is located on the lower side of the air inlet component of the housing. One side of the limit block away from the mounting plate is inside the air inlet component of the housing. At one end of the limit block inside the air inlet component of the housing, there is a first spring fixedly arranged. The first spring is fixedly connected to the air inlet component of the housing, and the first spring is used to pull the movable pin towards the mounting plate.

[0009] Preferably, a fixing ring is arranged around the air inlet component of the housing outside the limit block. The fixing ring is pressed against the surface of the housing by the air inlet component of the housing. There is a jack in the fixing ring, and an annular groove is arranged inside the fixing ring. The cross-section of the annular groove of the fixing ring is T-shaped.

[0010] Preferably, a rotating ring is rotatably arranged outside the fixing ring. Inside the rotating ring and outside the jack of the fixing ring, there is a second spring fixedly arranged. The other end of the second spring is fixedly provided with a movable pin. The movable pin is slidably connected to the rotating ring and the fixing ring. After the mounting plate is installed, it can be held tightly outside the rotating ring.

[0011] Preferably, the impeller assembly includes a mounting disc, which is rotatably connected to the housing. On the side of the mounting disc close to the inside of the housing, there are blades rotatably arranged. On the other side of the blades, there is a mounting ring, and the mounting ring is rotatably connected to the blades. There are four connecting columns in total for the blades.

[0012] Preferably, only two connecting columns of the blades are rotatably connected to the mounting ring and the mounting disc, and the other two connecting columns of the blades are slidably connected to the mounting ring and the mounting disc. On one side of the mounting disc close to the blades, there is a guiding disc rotatably arranged. A guiding groove is arranged outside the guiding disc, and the guiding groove is located outside the connecting columns of the blades.

[0013] Preferably, a clamping block is slidably arranged in the middle of the guiding disc. The clamping block is connected to the guiding disc through vertical knurling. A third spring is fixedly arranged inside the middle of the clamping block. There are four third springs in total. The third springs are used to pull the locking pin inward. The outer ends of the third springs are fixedly provided with locking pins. The locking pins are slidably connected to the guiding disc. A sleeve is fixedly arranged in the middle of the mounting disc.

[0014] Preferably, the sleeve passes through the clamping block. The clamping block is slidably connected to the sleeve. A slot is formed on the inner side of the sleeve and outside the locking pin. The slot is slidably connected to the locking pin. A pull rod is slidably arranged in the middle of the sleeve. One end of the pull rod is fixedly connected to the clamping block. A fourth spring is arranged around the pull rod. The two ends of the fourth spring are respectively fixedly connected to the clamping block and the sleeve.

[0015] Compared with the prior art, the technical solution of the present invention has the following advantages: (1) By providing a filter element assembly, when the fan changes the usage scenario, the filter screen that meets different requirements can be conveniently replaced. This design has multiple advantages: on the one hand, it can prevent the fan from bringing impurities from the previous environment into the new environment during operation; on the other hand, by replacing the filter screen adapted to different environments, the service life of each filter screen can be extended, ensuring that the filtering effect meets the standard, and unnecessary damage or excessive load on the filter screen can be prevented. In this way, not only the filtering capacity of the device is improved, but also its adaptability is enhanced, avoiding pollution of the new working environment caused by the device itself or adverse effects on other items in the environment, and finally achieving the purpose of reducing the use cost and maintenance frequency. Moreover, the filter element assembly can be rotated arbitrarily. When operating, the worker can operate according to the situation of the working environment and his own habits, which can increase the convenience during use to a certain extent. And when replacing the filter element, rotating it to the lowest end can also reduce the probability of impurities floating into the fan interior. (2) By providing an impeller assembly, the angle of the impeller blades can be flexibly changed. With this characteristic, the impeller can generate different magnitudes of wind power at the same rotational speed. When it is necessary to increase the wind power, by adjusting the blade angle, the power consumption can be reduced, effectively improving the environmental protection performance of the fan. Moreover, the operation of changing the blade angle is extremely simple and can be completed in only two steps. There is no need to turn screws throughout the process, simplifying the operation process and shortening the debugging time. And the blade angle can be adjusted arbitrarily. Compared with other adjustment methods, while ensuring the efficiency, the blade angle can be further increased. Brief Description of the Drawings

[0016] Figure 1 is a schematic three-dimensional structure diagram of the whole of the present invention; Figure 2 is a schematic partial cross-sectional structure diagram of the filter screen assembly of the present invention; Figure 3Schematic diagram of the installation structure of the filter screen assembly of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure at position A in Figure 5 Schematic diagram of the internal structure of the housing of the present invention; Figure 6 Schematic diagram of the internal structure of the impeller of the present invention; Figure 7 Schematic diagram of the sectional structure of the sleeve of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at position A in Figure 9 Schematic diagram of the internal structure (rear view) of the housing of the present invention; Figure 10 Schematic diagram of the structure of the filter screen assembly of the present invention.

[0017] In the figure: 1. Housing; 2. Filter element assembly; 201. Mounting plate; 202. Mounting block; 203. Elastic component; 204. Mounting box; 205. Magnet; 206. Filter screen; 207. Limiting block; 208. Spring 1; 209. Rotating ring; 210. Spring 2; 211. Movable pin; 212. Fixed ring; 3. Impeller assembly; 301. Mounting disc; 302. Blade; 303. Mounting ring; 304. Guide disc; 3041. Guide groove; 305. Clamping block; 306. Spring 3; 307. Locking pin; 308. Sleeve; 309. Slot; 310. Pull rod; 311. Spring 4. Detailed implementation manners

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0019] Unless otherwise defined, the technical terms or scientific terms used in this disclosure shall have the ordinary meanings understood by those of ordinary skill in the field to which this disclosure pertains. The words such as "including" or "comprising" used in this disclosure mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The words such as "connected" or "coupled" are not limited to physical or mechanical connections, and may also include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", and "right" are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0020] As Figures 1 to 10 shown, an energy-saving centrifugal fan with an impurity filtering function provided by the present invention includes a housing 1. The housing 1 is arranged in a volute shape. A filter element assembly 2 is provided on one side of the housing 1. The filter element assembly 2 is used for placing and replacing a filter screen 206. The filter element assembly 2 is located outside the air inlet of the housing 1. An impeller assembly 3 is provided inside the housing 1 on one side of the filter element assembly 2. The impeller assembly 3 is used for providing wind power and changing the air volume. The housing 1 presses and fixes the relevant components in the filter element assembly 2 through the components at the air inlet and the housing 1 itself.

[0021] The filter element assembly 2 includes a mounting plate 201. The mounting plate 201 is composed of two semi-circular plates. The mounting plate 201 is connected by screws. Mounting blocks 202 are fixedly provided on the outer surface of the mounting plate 201. Four groups of mounting blocks 202 are evenly distributed around the center of the mounting plate 201. There are two mounting blocks 202 in each group. The mounting blocks 202 are triangular in shape.

[0022] Elastic components 203 are fixedly provided inside both sides of the mounting block 202. Opposite sides of the elastic components 203 are fixedly provided with mounting boxes 204. The mounting boxes 204 are divided into upper and lower layers. The lower layer of the mounting box 204 is fixedly connected to the elastic components 203. The upper and lower layers of the mounting box 204 are connected by hinges. A magnet 205 is fixedly provided at one end of the interior of the mounting box 204 away from the hinge. The magnet 205 is used to prevent the mounting box 204 from accidentally opening.

[0023] A filter screen 206 is provided in the middle of the interior of the mounting box 204. A limiting block 207 is slidably provided inside the mounting plate 201 on the outer side of the air inlet component of the housing 1. The limiting block 207 is located below the air inlet component of the housing 1. One side of the limiting block 207 away from the mounting plate 201 is located inside the air inlet component of the housing 1. A first spring 208 is fixedly provided at one end of the limiting block 207 located inside the air inlet component of the housing 1. The first spring 208 is fixedly connected to the air inlet component of the housing 1. The first spring 208 is used to pull the movable pin 211 towards the mounting plate 201.

[0024] Around the outside of the limit block 207, a fixing ring 212 is provided around the air inlet component of the housing 1. The fixing ring 212 is pressed by the air inlet component of the housing 1 against the surface of the housing 1. An insertion hole is opened inside the fixing ring 212, an annular groove is opened inside the fixing ring 212, and the cross-section of the annular groove of the fixing ring 212 is T-shaped.

[0025] A rotating ring 209 is rotatably arranged on the outside of the fixing ring 212. Inside the rotating ring 209, a second spring 210 is fixedly arranged outside the insertion hole of the fixing ring 212. The other end of the second spring 210 is fixedly provided with a movable pin 211. The movable pin 211 is slidably connected to the rotating ring 209 and the fixing ring 212. After the mounting plate 201 is installed, it can be clamped on the outside of the rotating ring 209.

[0026] The impeller assembly 3 includes a mounting disc 301. The mounting disc 301 is rotatably connected to the housing 1. On the side of the mounting disc 301 close to the inside of the housing 1, blades 302 are rotatably arranged. On the other side of the blades 302, a mounting ring 303 is provided. The mounting ring 303 is rotatably connected to the blades 302. The blades 302 have a total of four connecting columns.

[0027] Only two connecting columns of the blades 302 are rotatably connected to the mounting ring 303 and the mounting disc 301, and the other two connecting columns of the blades 302 are slidably connected to the mounting ring 303 and the mounting disc 301. On one side of the mounting disc 301 close to one side of the blades 302, a guide disc 304 is rotatably arranged. A guide groove 3041 is opened on the outside of the guide disc 304. The guide groove 3041 is located outside the connecting columns of the blades 302.

[0028] A clamping block 305 is slidably arranged in the middle of the guide disc 304. The clamping block 305 is connected to the guide disc 304 by vertical knurling. Inside the middle of the clamping block 305, a third spring 306 is fixedly arranged. A total of four third springs 306 are provided. The third springs 306 are used to pull the locking pin 307 inward. The outer ends of the third springs 306 are fixedly provided with the locking pin 307. The locking pin 307 is slidably connected to the guide disc 304. A sleeve 308 is fixedly arranged in the middle of the mounting disc 301.

[0029] The sleeve 308 passes through the clamping block 305. The clamping block 305 is slidably connected to the sleeve 308. Inside the sleeve 308, a slot 309 is opened outside the locking pin 307. The slot 309 is slidably connected to the locking pin 307. A pull rod 310 is slidably arranged in the middle of the sleeve 308. One end of the pull rod 310 is fixedly connected to the clamping block 305. A fourth spring 311 is arranged around the pull rod 310. The two ends of the fourth spring 311 are respectively fixedly connected to the clamping block 305 and the sleeve 308.

[0030] Working principle and usage process of the present invention: When the fan is in use, the filter screen 206 with an appropriate filtration capacity can be selected according to the on-site environment. When selecting, rotate the mounting plate 201 until the appropriate filter screen 206 is stopped above the air inlet. Then, pull the filter screen 206 towards the air inlet until the limit block 207 is snapped into the round hole in the mounting box 204, and then it can be used. When replacing the filter screen 206, push the filter screen 206 upwards to reset and then repeat the above steps. When the filter screen 206 reaches the end of its service life, rotate the mounting plate 201 until the filter screen 206 is in a suitable position (it is recommended to move it to the side or below), open the mounting box 204 to let the filter screen 206 fall out, install a new filter screen 206, and cover the mounting box 204 to complete the replacement. When rotating the mounting plate 201, the movable pin 211 will first move out of the range of the jack and then insert into the next jack. Since the movable pin 211 is located at the center of the mounting box 204, it can assist the mounting box 204 to stop at a suitable position when the mounting plate 201 is rotated. Before use, the distance between the blades 302 can be adjusted according to specific circumstances. When adjusting, pull the pull rod 310 to pull the clamping block 305 outwards. At this time, the guide disk 304 can rotate freely. When the guide disk 304 rotates, the position of the guide groove 3041 changes, and the angle of the blade 302 changes accordingly. Then, release the pull rod 310. After the clamping block 305 resets, the guide disk 304 is fixed by knurling. After the impeller starts to rotate, the locking pin 307 is thrown outwards under the action of centrifugal force and inserted into the slot 309 to prevent the clamping block 305 from accidentally slipping off when the impeller rotates. After the impeller stops rotating, the spring three 306 pulls the locking pin 307 back inwards.

[0031] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. An energy-saving centrifugal fan with impurity filtering function, comprising a housing (1), characterized in that: The housing (1) is volute-shaped, a filter element assembly (2) is arranged on one side of the housing (1), the filter element assembly (2) is used to place and replace the filter screen (206), the filter element assembly (2) is located outside the air inlet of the housing (1), an impeller assembly (3) is arranged inside the housing (1) on one side of the filter element assembly (2), the impeller assembly (3) is used to provide wind force and change the air volume, and the housing (1) compresses and fixes the relevant components in the filter element assembly (2) through the components at the air inlet and the housing (1) itself.

2. The energy-saving centrifugal fan with impurity filtering function according to claim 1, characterized in that: The filter element assembly (2) comprises a mounting plate (201), the mounting plate (201) being composed of two semicircular plates, the mounting plates (201) being connected by screws, a mounting block (202) being fixedly arranged on the outer surface of the mounting plate (201), the mounting blocks (202) being evenly distributed in four groups around the center of the mounting plate (201), the mounting blocks (202) being two in each group, and the mounting blocks (202) being arranged in a triangular shape.

3. The energy-saving centrifugal fan with impurity filtering function according to claim 2, characterized in that: Elastic components (203) are fixedly arranged inside the two sides of the installation block (202), and an installation box (204) is fixedly arranged on a side opposite to the elastic component (203). The installation box (204) is divided into an upper and lower layer. The lower layer of the installation box (204) is fixedly connected to the elastic component (203), and the upper and lower layers of the installation box (204) are connected by a hinge. A magnet (205) is fixedly arranged at one end of the installation box (204) away from the hinge, and the magnet (205) is used to prevent the installation box (204) from being accidentally opened.

4. The energy-saving centrifugal fan with impurity filtering function according to claim 3, characterized in that: A filter screen (206) is arranged in the middle of the interior of the installation box (204); a limit block (207) is slidably arranged on the inner side of the installation plate (201) and located on the outer side of the air inlet component of the outer shell (1); the limit block (207) is located on the lower side of the air inlet component of the outer shell (1); the side of the limit block (207) away from the installation plate (201) is located inside the air inlet component of the outer shell (1); a spring (208) is fixedly arranged on one end of the limit block (207) located inside the air inlet component of the outer shell (1); the spring (208) is fixedly connected to the air inlet component of the outer shell (1); and the spring (208) is used to pull the movable pin (211) toward the installation plate (201).

5. The energy-saving centrifugal fan with impurity filtering function according to claim 4, characterized in that: A fixing ring (212) is arranged outside the limit block (207) and around the air inlet component of the outer shell (1); the fixing ring (212) is pressed against the surface of the outer shell (1) by the air inlet component of the outer shell (1); a plug hole is provided inside the fixing ring (212); an annular groove is provided inside the fixing ring (212); and the cross section of the annular groove of the fixing ring (212) is T-shaped.

6. The energy-saving centrifugal fan with impurity filtering function according to claim 5, characterized in that: A rotating ring (209) is rotatably arranged on the outer side of the fixed ring (212); a second spring (210) is fixedly arranged inside the rotating ring (209) and located on the outer side of the insertion hole of the fixed ring (212); a movable pin (211) is fixedly arranged on the other end of the second spring (210); the movable pin (211) is slidably connected to the rotating ring (209) and the fixed ring (212); and the mounting plate (201) can be tightly held on the outer side of the rotating ring (209) after being installed.

7. The energy-saving centrifugal fan with impurity filtering function according to claim 1, characterized in that: The impeller assembly (3) comprises a mounting plate (301), the mounting plate (301) being rotatably connected to the outer casing (1), a blade (302) being rotatably provided on one side of the mounting plate (301) close to the inner side of the outer casing (1), a mounting ring (303) being rotatably connected to the blade (302), and the blade (302) having a total of four connecting columns.

8. The energy-saving centrifugal fan with impurity filtering function according to claim 7, characterized in that: The blade (302) has only two connecting columns that are rotatably connected to the mounting ring (303) and the mounting plate (301); the other two connecting columns of the blade (302) are slidably connected to the mounting ring (303) and the mounting plate (301); a guide plate (304) is rotatably provided on one side of the mounting plate (301) close to the side of the blade (302); a guide groove (3041) is provided on the outer side of the guide plate (304); and the guide groove (3041) is located on the outer side of the connecting column of the blade (302).

9. The energy-saving centrifugal fan with impurity filtering function according to claim 8, characterized in that: A clamping block (305) is slidably provided in the middle of the guide plate (304), and the clamping block (305) is connected to the guide plate (304) via a vertical knurling. A spring three (306) is fixedly provided in the middle of the clamping block (305), and a total of four springs three (306) are provided. The spring three (306) is used to pull the locking pin (307) inwards, and a locking pin (307) is fixedly provided at the outer end of the spring three (306). The locking pin (307) is slidably connected to the guide plate (304), and a sleeve (308) is fixedly provided in the middle of the mounting plate (301).

10. The energy-saving centrifugal fan with impurity filtering function according to claim 9, characterized in that: The sleeve (308) passes through the block (305), the block (305) is slidably connected to the sleeve (308), a slot (309) is provided inside the sleeve (308) and located outside the locking pin (307), the slot (309) is slidably connected to the locking pin (307), a pull rod (310) is slidably arranged in the middle of the sleeve (308), one end of the pull rod (310) is fixedly connected to the block (305), a spring four (311) is arranged around the pull rod (310), and two ends of the spring four (311) are respectively fixedly connected to the block (305) and the sleeve (308).

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