Energy-saving centrifugal fan

Abstract

The application belongs to the technical field of centrifugal fan, and discloses an energy-saving centrifugal fan, which comprises a fan casing and a fan impeller movably installed in the fan casing, one end of the fan casing is integrally formed with an air outlet, a partition assembly is movably installed in the fan casing and the air outlet, the part of the partition assembly extending into the fan casing is matched with the fan impeller, and the other end of the partition assembly penetrates through the air outlet and extends to the top of the air outlet; the partition assembly comprises a plurality of control linkage plates and a plurality of partition scrapers. Due to the arrangement of the partition assembly, the dust adhered to the inner wall of the fan casing and the air outlet and the outer surface of the fan impeller can be scraped conveniently under the cooperation of the control linkage plates and the partition scrapers, so that the inside of the equipment can be cleaned efficiently, the load of the driving motor is reduced effectively, and the energy-saving effect is achieved.

Description

Technical Field

[0001] This invention belongs to the field of centrifugal fan technology, specifically an energy-saving centrifugal fan. Background Technology

[0002] Centrifugal fans drive the impeller to rotate via a motor. The blades in the impeller force the gas to rotate, doing work on the gas and increasing its energy. Under the action of centrifugal force, the gas is thrown out around the impeller. The volute converts the velocity energy into pressure energy. After the gas is discharged from the impeller, the pressure inside the impeller is lower than the pressure inside the inlet. New gas is continuously drawn into the impeller under the action of the pressure difference, and thus is continuously output from the outlet.

[0003] In existing technologies, centrifugal fans have relatively simple casing structures, mainly volute casings with internal rotating impellers, driven by motors mounted on the back of the casing. However, during long-term operation, dust and other foreign objects inevitably accumulate in the intake air, causing them to adhere to the impeller blades and the inner wall of the casing. This increases friction between the impeller / casing and the air, and also increases the motor load, significantly increasing motor energy consumption. Therefore, it is necessary to develop an energy-saving centrifugal fan to solve the problem of increased energy consumption caused by dust accumulation during long-term operation of current centrifugal fans. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides an energy-saving centrifugal fan with advantages such as energy saving.

[0005] The system utilizes a combination of a control plate and a partition scraper to easily remove dust adhering to the inner walls of the fan casing and air outlet, as well as the outer surface of the fan impeller. This effectively reduces the load on the drive motor, thereby achieving energy savings.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving centrifugal fan, comprising a fan casing and a fan impeller movably installed inside the fan casing, wherein one end of the fan casing is integrally formed with an air outlet, and a partition component is movably installed inside the fan casing and the air outlet, wherein the portion of the partition component extending into the fan casing is adapted to the fan impeller, and the other end of the partition component penetrates the air outlet and extends to the top of the air outlet; The partition assembly includes several control linkage plates that are slidably engaged with the front end of the air outlet and are evenly distributed, and several partition scrapers that are movably installed inside the fan casing and the air outlet and are evenly distributed. The portion of the partition scraper inside the fan casing is axially engaged with the outside of the fan impeller, and the portion of the partition scraper inside the air outlet is fixedly connected to the control linkage plates. The upper end of the control linkage plate extends to the top of the air outlet and is connected to a locking assembly. The locking assembly is movably connected to two positioning frames, one in front and one behind, which are fixedly installed on the air outlet. The locking assembly locks the control linkage plates. After unlocking, the control linkage plates are pushed and the partition scrapers are moved back and forth, causing the partition scrapers to slide along the inner wall of the fan casing and the air outlet, as well as the outer surface of the fan impeller.

[0007] Preferably, the dividing scraper includes a rotating dividing plate that is axially snapped onto the outside of the fan impeller. The rotating dividing plate has a snap-fit ​​groove in the middle that is adapted to the fan impeller, and the inner wall of the snap-fit ​​groove is in contact with the outer surface of the fan impeller.

[0008] Preferably, a fixed partition scraper is movably connected to the side of the rotating partition plate near the air outlet, and the other end of the fixed partition scraper extends to the front end of the air outlet cavity and is fixedly connected to the lower end of the control linkage plate. The fixed partition scraper slides against the inner wall of the air outlet.

[0009] Preferably, a limiting groove is formed on the annular surface of the rotating partition plate, the end of the fixed partition scraper near the rotating partition plate is arc-shaped and adapted to the rotating partition plate, and a protrusion is integrally formed on the end of the fixed partition scraper that is adapted to the rotating partition plate. The protrusion is slidably engaged in the interior of the limiting groove, and the outer surface of the protrusion and the inner wall of the limiting groove are both smooth.

[0010] Preferably, the locking assembly includes a locking limit rod passing through the upper end of a plurality of control linkage plates, the two ends of the locking limit rod being rotatably connected to the positioning frame via bearings, and a knob being fixedly connected to the front end of the locking limit rod.

[0011] Preferably, a plurality of axially evenly distributed positioning blocks are provided on both the left and right sides of the outer surface of the locking limiting rod, and two left and right limiting blocks are integrally formed on the inner wall opposite to the locking limiting rod on the control linkage plate. The two locking components are respectively engaged on both sides of a corresponding positioning block. The arc length of the limiting block and the positioning block is less than one-quarter of the arc length of the circle in which they are located.

[0012] Preferably, a plurality of evenly distributed positioning components are embedded in the front end of the air outlet, and the plurality of positioning components correspond one-to-one with the control linkage plate, and the control linkage plate is locked to the front end of the air outlet by the positioning components.

[0013] Preferably, the positioning component includes a limiting slider embedded in the front end of the air outlet. Two positioning protrusions are fixedly connected to the front side of the limiting slider. Both sides of the front end of the positioning protrusions are smooth slopes that extend to the front of the air outlet and are tilted and clamped to both sides of a corresponding control linkage plate.

[0014] Preferably, a positioning spring is connected to the back of the limiting slider, and the positioning spring is pressed into the air outlet by the limiting slider; the distance between the upper and lower sides of the limiting slider is greater than the distance between the upper and lower ends of the positioning protrusion, and the distance between the two positioning protrusions extending to the front end of the air outlet is less than the thickness of the control linkage plate.

[0015] Preferably, an air inlet is fixedly installed on the front of the fan casing by bolts, the front end of the fan impeller is connected to the air inlet by a bearing, and a drive motor is fixedly installed on the back of the fan casing, with the output end of the drive motor fixedly connected to the back of the fan impeller.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: Due to the design of the partition component, the present invention, in conjunction with the control linkage plate and the partition scraper, facilitates the removal of dust adhering to the inner wall of the fan casing and air outlet, as well as the outer surface of the fan impeller, thereby enabling efficient cleaning of the equipment interior and effectively reducing the load on the drive motor, thus achieving energy-saving effects.

[0017] Due to the design of the control linkage plate and the dividing scraper, this invention facilitates the separation of several independent channels within the fan casing and the air outlet during equipment operation. This causes airflow to enter the fan casing from the front end (i.e., one of the shaft ends), resulting in different air pressures at the front and rear ends of the fan casing and the shaft, leading to unstable airflow and mutual interference within the fan casing and the air outlet. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a side view of the present invention; Figure 4 This is a schematic diagram of the internal structure of the present invention; Figure 5 This is a front view of the internal structure of the present invention; Figure 6 This is a schematic diagram of the structure of the rotating dividing scraper of the present invention; Figure 7 This is a schematic diagram of the locking component of the present invention; Figure 8 This is a schematic diagram of the positioning component of the present invention; Figure 9 This is a side view of the rotating dividing scraper of the present invention; Figure 10 This is a top view schematic diagram of the airflow in the fan casing of the present invention.

[0019] In the diagram: 1. Fan casing; 2. Fan impeller; 3. Air outlet; 4. Divider assembly; 41. Control linkage plate; 42. Divider scraper; 421. Rotating divider plate; 422. Fixed divider scraper; 423. Mounting slot; 424. Limiting slot; 43. Locking assembly; 431. Locking limit rod; 432. Knob; 433. Limiting block; 434. Positioning block; 44. Positioning frame; 45. Positioning assembly; 451. Limiting slider; 452. Positioning spring; 453. Positioning protrusion; 5. Air inlet; 6. Drive motor. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 10 As shown, the present invention provides an energy-saving centrifugal fan, including a fan housing 1 and a fan impeller 2 movably installed inside the fan housing 1. One end of the fan housing 1 is integrally formed with an air outlet 3. A partition component 4 is movably installed inside the fan housing 1 and the air outlet 3. The portion of the partition component 4 extending into the fan housing 1 is adapted to the fan impeller 2. The other end of the partition component 4 passes through the air outlet 3 and extends to the top of the air outlet 3. The partition assembly 4 includes several control linkage plates 41 that are slidably engaged with the front end of the air outlet 3 and evenly distributed, and several partition scrapers 42 that are movably installed inside the fan housing 1 and the air outlet 3 and evenly distributed. The portion of the partition scraper 42 located inside the fan housing 1 is axially engaged with the outside of the fan impeller 2, and the portion of the partition scraper 42 located inside the air outlet 3 is fixedly connected to the control linkage plates 41. The upper end of the control linkage plate 41 extends to the top of the air outlet 3 and is connected to a locking assembly 43. The locking assembly 43 is movably connected to two positioning frames 44, which are fixedly installed on the air outlet 3. The locking assembly 43 locks the several control linkage plates 41. After unlocking, the control linkage plates 41 are pushed and the partition scrapers 42 are moved back and forth, so that the partition scrapers 42 slide along the inner wall of the fan housing 1 and the air outlet 3 and the outer surface of the fan impeller 2. Due to the setting of the partition component 4, with the cooperation of the control linkage plate 41 and the partition scraper 42, it is convenient to scrape off the dust attached to the inner wall of the fan casing 1 and the air outlet 3 and the outer surface of the fan impeller 2, so as to efficiently clean the inside of the equipment, thereby effectively reducing the load on the drive motor 6 and achieving the effect of energy saving.

[0022] The partition scraper 42 includes a rotating partition plate 421 that is axially engaged with the outside of the fan impeller 2. The rotating partition plate 421 has a mounting groove 423 in the middle that is adapted to the fan impeller 2. The inner wall of the mounting groove 423 is in contact with the outer surface of the fan impeller 2.

[0023] Among them, the rotating partition plate 421 is movably connected to the fixed partition scraper 422 on the side near the air outlet 3. The other end of the fixed partition scraper 422 extends to the front end of the inner cavity of the air outlet 3 and is fixedly connected to the lower end of the control linkage plate 41. The fixed partition scraper 422 slides against the inner wall of the air outlet 3.

[0024] Among them, the rotating partition plate 421 has a limiting groove 424 on its annular surface, the fixed partition scraper 422 has an arc surface at one end near the rotating partition plate 421 and is adapted to the rotating partition plate 421, and the fixed partition scraper 422 adapted to the rotating partition plate 421 has a protrusion integrally formed at one end, the protrusion is slidably engaged in the inside of the limiting groove 424, the outer surface of the protrusion and the inner wall of the limiting groove 424 are both smooth, and a uniform gap is left between the outer surface of the protrusion and the inner wall of the limiting groove 424. Due to the configuration of the control linkage plate 41 and the dividing scraper 42, during equipment operation, it is convenient to separate several independent channels in the fan casing 1 and the air outlet 3, so as to avoid the problem of unstable airflow and mutual interference in the fan casing 1 and the front and rear ends of the shaft due to the airflow entering from the front end (i.e., one of the shaft ends).

[0025] The locking assembly 43 includes a locking limit rod 431 that passes through the upper end of several control linkage plates 41. The two ends of the locking limit rod 431 are rotatably connected to the positioning frame 44 through bearings, and a knob 432 is fixedly connected to the front end of the locking limit rod 431.

[0026] Among them, the locking limit rod 431 has several axially evenly distributed positioning blocks 434 on both the left and right sides of its outer surface. The control linkage plate 41 has two left and right limit blocks 433 integrally formed on the inner wall opposite to the locking limit rod 431. The two locking components 43 are respectively engaged on both sides of the corresponding positioning block 434. The arc length of the limit block 433 and the positioning block 434 is less than one-quarter of the arc length of the circle in which they are located. Due to the setting of the locking component 43, it is easy to lock several control linkage plates 41. In turn, with the cooperation of the limit slot 424 and the protrusion, it is easy to lock several partition scrapers 42, ensuring that when the rotating partition plate 421 rotates rapidly with the fan impeller 2, it always matches the fixed partition scraper 422, thereby ensuring the stability of the independent channel.

[0027] Among them, the front end of the air outlet 3 is embedded with several evenly distributed positioning components 45, and the positioning components 45 correspond one-to-one with the control linkage plate 41. The control linkage plate 41 is locked to the front end of the air outlet 3 by the positioning components 45.

[0028] The positioning component 45 includes a limiting slider 451 embedded in the front end of the air outlet 3. Two positioning protrusions 453 are fixedly connected to the front of the limiting slider 451. Both sides of the front end of the positioning protrusions 453 are smooth slopes and extend to the front of the air outlet 3, and are tilted and clamped on both sides of a corresponding control linkage plate 41.

[0029] Among them, the back of the limiting slider 451 is connected to the positioning spring 452, and the positioning spring 452 is pressed into the air outlet 3 by the limiting slider 451; the distance between the upper and lower sides of the limiting slider 451 is greater than the distance between the upper and lower ends of the positioning protrusion 453, and the distance between the two positioning protrusions 453 extending to the front end of the air outlet 3 is less than the thickness of the control linkage plate 41. Due to the positioning component 45, under the restriction of the locking component 43 on the control linkage plate 41, the forward and backward movement of the control linkage plate 41 facilitates the control linkage plate 41 to quickly reach the corresponding position under the elastic locking action of the positioning component 45, which is convenient for quickly and evenly distributing several control linkage plates 41 before locking them by the locking component 43.

[0030] The fan casing 1 has an air inlet 5 fixedly installed on the front side by bolts. The front end of the fan impeller 2 is connected to the air inlet 5 by a bearing. The fan casing 1 has a drive motor 6 fixedly installed on the back side, and the output end of the drive motor 6 is fixedly connected to the back side of the fan impeller 2.

[0031] Working principle and usage process of this invention: Starting the drive motor 6 will drive the fan impeller 2 to rotate rapidly inside the fan casing 1, which in turn drives the air inside the fan casing 1 to rotate at high speed. Under the action of centrifugal force, the high-speed rotating air is discharged from the air outlet 3. After the high-speed rotating air inside the fan casing 1 is discharged, the air pressure inside the fan casing 1 decreases, so air is drawn in again from the air inlet 5. This process can be repeated. Firstly, with the cooperation of the protrusions on the fan impeller 2, the limiting slot 424, and the rotating partition plate 421, when the fan impeller 2 rotates rapidly, the rotating partition plate 421 can be driven to rotate synchronously with the cooperation of the mounting slot 423. This makes it easy for the air inlet 5 to be separated into parallel and independent channels by several partition components 4 through the passage connecting the fan casing 1 and the air outlet 3. This avoids the situation where the air entering from the air inlet 5 at the shaft end of the fan impeller 2 has a different air pressure than the air at the rear end of the fan impeller 2, which would cause unstable airflow in the fan casing 1 and the air outlet 3 and affect each other. This ensures that the air flows stably after being discharged from the air outlet 3. After a period of time, when it is necessary to clean the dust adhering to the inner walls of the fan casing 1 and the air outlet 3, as well as the surface of the fan impeller 2, turn the knob 432 and drive the locking limit rod 431 so that the positioning block 434 on its surface is rotated out of the limit block 433. At this time, the control linkage plate 41 can be pushed back and forth to overcome the elastic limitation of the positioning component 45, and the control linkage plate 41 can slide back and forth along the surface of the locking limit rod 431. At the same time, it drives the separating scraper 42 to slide along the inner walls of the fan casing 1 and the air outlet 3, as well as the surface of the fan impeller 2, thereby efficiently scraping the dust. After removing dust from the inner walls of the fan casing 1 and the air outlet 3, as well as the surface of the fan impeller 2, the drive motor 6 is started and controlled to drive the fan impeller 2 to rotate slowly. This slow airflow carries away some of the dust generated during the cleaning process. After cleaning, with the cooperation of the positioning component 45, several control linkage plates 41 and partition scrapers 42 are evenly locked by the locking component 43. Then, the drive motor 6 is controlled to run at high speed, which causes the fan impeller 2 to form a high-speed airflow inside the fan casing 1, thereby carrying away the scraped dust particles and cleaning the inside of the fan casing 1.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving centrifugal fan, comprising a fan casing and a fan impeller movably installed inside the fan casing, characterized in that: One end of the fan housing is integrally formed with an air outlet. A partition component is movably installed inside the fan housing and the air outlet. The part of the partition component extending into the fan housing is adapted to the fan impeller. The other end of the partition component passes through the air outlet and extends to the top of the air outlet. The partition assembly includes several control linkage plates that are slidably engaged with the front end of the air outlet and are evenly distributed, and several partition scrapers that are movably installed inside the fan casing and the air outlet and are evenly distributed. The portion of the partition scraper inside the fan casing is axially engaged with the outside of the fan impeller, and the portion of the partition scraper inside the air outlet is fixedly connected to the control linkage plates. The upper end of the control linkage plate extends to the top of the air outlet and is connected to a locking assembly. The locking assembly is movably connected to two positioning frames, one in front and one behind, which are fixedly installed on the air outlet. The locking assembly locks the control linkage plates. After unlocking, the control linkage plates are pushed and the partition scrapers are moved back and forth, causing the partition scrapers to slide along the inner wall of the fan casing and the air outlet, as well as the outer surface of the fan impeller.

2. The energy-saving centrifugal fan according to claim 1, characterized in that: The dividing scraper includes a rotating dividing plate that is axially snapped onto the outside of the fan impeller. The rotating dividing plate has a snap-fit ​​groove in the middle that is adapted to the fan impeller. The inner wall of the snap-fit ​​groove is in contact with the outer surface of the fan impeller.

3. The energy-saving centrifugal fan according to claim 2, characterized in that: A fixed partition scraper is movably connected to the side of the rotating partition plate near the air outlet. The other end of the fixed partition scraper extends to the front end of the air outlet cavity and is fixedly connected to the lower end of the control linkage plate. The fixed partition scraper slides against the inner wall of the air outlet.

4. The energy-saving centrifugal fan according to claim 3, characterized in that: The rotating partition plate has a limiting groove on its annular surface. The fixed partition scraper has an arc surface at one end near the rotating partition plate and is adapted to the rotating partition plate. The fixed partition scraper has a protrusion integrally formed at the end adapted to the rotating partition plate. The protrusion is slidably engaged inside the limiting groove. The outer surface of the protrusion and the inner wall of the limiting groove are both smooth.

5. An energy-saving centrifugal fan according to claim 1, characterized in that: The locking assembly includes a locking limit rod that passes through the upper end of several control linkage plates. The two ends of the locking limit rod are rotatably connected to the positioning frame via bearings, and a knob is fixedly connected to the front end of the locking limit rod.

6. An energy-saving centrifugal fan according to claim 5, characterized in that: The locking limit rod has several axially evenly distributed positioning blocks on both the left and right sides of its outer surface. The control linkage plate has two limit blocks integrally formed on the inner wall opposite to the locking limit rod. The two locking components are respectively engaged on both sides of a corresponding positioning block. The arc length of the limit block and the positioning block is less than one-quarter of the arc length of the circle in which they are located.

7. An energy-saving centrifugal fan according to claim 1, characterized in that: The front end of the air outlet is embedded with several evenly distributed positioning components, each of which corresponds to a control linkage plate. The control linkage plate is secured to the front end of the air outlet by the positioning components.

8. An energy-saving centrifugal fan according to claim 7, characterized in that: The positioning component includes a limiting slider embedded in the front end of the air outlet. Two positioning protrusions are fixedly connected to the front of the limiting slider. The top view of the end of the positioning protrusion away from the limiting slider is triangular and smooth. The ends of the two positioning protrusions away from the limiting slider extend to the front of the air outlet and are respectively locked on both sides of a corresponding control linkage plate.

9. An energy-saving centrifugal fan according to claim 8, characterized in that: A positioning spring is connected to the back of the limiting slider, and the positioning spring is pressed into the air outlet by the limiting slider; the distance between the upper and lower sides of the limiting slider is greater than the distance between the upper and lower ends of the positioning protrusion, and the distance between the two positioning protrusions extending to the front end of the air outlet is less than the thickness of the control linkage plate.

10. An energy-saving centrifugal fan according to claim 1, characterized in that: An air inlet is fixedly installed on the front of the fan casing by bolts. The front end of the fan impeller is connected to the air inlet by a bearing. A drive motor is fixedly installed on the back of the fan casing, and the output end of the drive motor is fixedly connected to the back of the fan impeller.

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