Injection molding centrifugal fan blade unit and centrifugal fan

The injection molded centrifugal fan unit with a dust-filtering mechanism and automatic cleaning system addresses the issue of dust accumulation on blades by filtering air and cleaning the filter automatically, ensuring consistent performance.

CN222185135UActive Publication Date: 2024-12-17CHANGZHOU CHENYANG LIGHTING ELECTRIC APPLIANCES CO LTD
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Patent Information

Application Number
CN202420964362.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-07
Publication Date
2024-12-17
Estimated Expiration
2034-05-07

AI Technical Summary

Technical Problem

Centrifugal fans lack an air filter device, leading to dust accumulation on the blades, which affects the air outlet effect over time.

Method used

An injection molded centrifugal fan unit with an interception mechanism and air inlet tube that filters dust during operation, featuring a filter screen with a rotating mechanism for automatic cleaning.

Benefits of technology

Prevents dust from covering the impeller by filtering incoming air and automatically cleans the filter when the fan is restarted, maintaining air outlet efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of centrifugal fans, and particularly relates to an injection molding centrifugal fan blade unit and a centrifugal fan, the injection molding centrifugal fan blade unit comprises a fan blade wheel, one end face of the fan blade wheel is provided with a connecting plate, and the other end face of the fan blade wheel is hollow; wherein the center of the connecting plate is connected with the motor; an intercepting mechanism is arranged at the hollowed-out end of the wind impeller; wherein the intercepting mechanism is located between the fan blade wheel and the air inlet pipe and used for connecting the fan blade wheel and the air inlet pipe and filtering dust in flowing air in the air inlet pipe in the rotating process of the fan blade wheel; according to the centrifugal fan, the air inlet barrel is additionally arranged between the fan impeller and the air inlet pipe, air flowing into the centrifugal fan is filtered and dust is intercepted in the normal working process of the centrifugal fan, the fan impeller is prevented from being stained with dust, the air outlet effect is prevented from being affected, after use is completed, when the centrifugal fan is started next time, the filter screen is cleaned through flowing air flow, and the air outlet effect is improved. And the automatic cleaning effect is achieved.
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Description

Technical Field

[0001] The utility model belongs to the technical field of centrifugal fans, and in particular relates to an injection-molded centrifugal fan blade unit and a centrifugal fan. Background Art

[0002] A centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and air intake of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and conveying of grains; inflation and propulsion of wind tunnel wind sources and hovercraft, etc.

[0003] The existing centrifugal fans lack an air filter device and are unable to remove dust from the air flowing through the centrifugal fan blades, resulting in the centrifugal fan blades being covered with dust after long-term use.

[0004] Therefore, an injection molded centrifugal fan unit and a centrifugal fan are designed to solve the technical problem that the centrifugal fan in the prior art cannot filter dust in the air. Utility Model Content

[0005] The utility model aims to provide an injection molded centrifugal fan unit and a centrifugal fan to solve the above technical problems.

[0006] In order to solve the above technical problems, the utility model provides an injection molded centrifugal fan blade unit, comprising:

[0007] The wind impeller has a connecting plate on one end surface and a hollowed-out end surface;

[0008] The center of the connecting plate is connected to the motor; and

[0009] An interception mechanism is provided at one hollow end of the wind impeller;

[0010] The interception mechanism is located between the impeller and the air inlet pipe, and is used to connect the impeller and the air inlet pipe, and to filter dust in the flowing air in the air inlet pipe during the rotation of the impeller.

[0011] Furthermore, the impeller is injection molded.

[0012] Further, the interception mechanism comprises:

[0013] An air inlet cylinder, one end of which is connected to the hollow end of the wind impeller; and

[0014] The other end of the air inlet cylinder is connected to the air inlet pipe;

[0015] A filter is arranged inside the air inlet cylinder.

[0016] Furthermore, a rotating shaft is provided on the inner wall of the air inlet cylinder;

[0017] A driving gear is disposed at one end of the rotating shaft, and a driving bevel gear is disposed at the other end of the rotating shaft; and

[0018] An overrunning clutch is arranged at the connection between the rotating shaft and the driving bevel gear.

[0019] Furthermore, an inner tooth ring is provided on the inner wall of one end of the wind impeller connected to the air inlet cylinder;

[0020] The driving gear is located on the inner side of the inner gear ring and meshes with the inner gear ring.

[0021] Furthermore, a rotating rod is vertically arranged inside the filter;

[0022] The two ends of the rotating rod are respectively connected to the inner wall of the air inlet cylinder; and

[0023] A through groove is provided at the bottom of the filter screen, and a driven bevel gear is arranged in the through groove;

[0024] The rotating rod passes through the driven bevel gear.

[0025] Furthermore, a positioning hole is provided at one end of the air inlet cylinder connected to the air inlet pipe;

[0026] A connecting hole is arranged at one end of the air inlet pipe connected to the air inlet cylinder.

[0027] Furthermore, the air inlet cylinder is connected to the air inlet pipe via a connecting mechanism;

[0028] The connecting mechanism comprises:

[0029] Bolts and nuts that fit the bolts; wherein

[0030] The bolt is suitable for passing through the positioning hole and the connecting hole and cooperating with the nut to connect the air inlet cylinder and the air inlet pipe.

[0031] In another aspect, the utility model further provides a centrifugal fan, comprising:

[0032] A fan housing is sleeved on the outer side of the fan impeller; and

[0033] The output end of the motor passes through a side wall of the fan housing and is connected to the connecting plate.

[0034] Furthermore, the injection molded centrifugal fan blade unit as described above is used.

[0035] The beneficial effect of the utility model is that, by adding an air inlet tube between the impeller and the air inlet pipe, the air flowing into the inside of the centrifugal fan is filtered during the normal operation of the centrifugal fan, and dust is intercepted to prevent the impeller from being covered with dust and affecting the air outlet effect. After use, when the centrifugal fan is started next time, the filter screen is cleaned by the wind flow passing through, thereby achieving an automatic cleaning effect.

[0036] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0040] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0041] Figure 3 The utility model Figure 2 The enlarged structural diagram of part A in the middle;

[0042] Figure 4 The utility model Figure 2 The enlarged structural diagram of part B in the middle;

[0043] Figure 5 It is a schematic diagram of the three-dimensional structure of the wind impeller of the utility model.

[0044] In the figure:

[0045] 1. Fan housing; 10. Air outlet; 11. Fan impeller; 110. Internal gear ring;

[0046] 2. Motor; 20. Base;

[0047] 3. Air inlet cylinder; 30. Positioning hole; 31. Driving gear; 32. Driving bevel gear; 33. Filter; 330. Rotating rod; 331. Driven bevel gear; 33a. Rotating part; 33b. Fixed part; 34. Rotating shaft;

[0048] 4. Air inlet; 40. Connection hole. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] The existing centrifugal fans lack an air filter device and are unable to remove dust from the air flowing through the centrifugal fan blades, resulting in the centrifugal fan blades being covered with dust after long-term use.

[0051] To solve the above technical problems, in at least one embodiment, an injection molded centrifugal fan unit is provided, including: an impeller 11, a connecting plate is provided on one end face of which, and the other end face is hollowed out; wherein the center of the connecting plate is connected to the motor 2; and an intercepting mechanism is provided at the hollow end of the impeller 11; wherein the intercepting mechanism is located between the impeller 11 and the air inlet pipe 4, and is used to connect the impeller 11 and the air inlet pipe 4, and filter dust in the flowing air in the air inlet pipe 4 during the rotation of the impeller 11.

[0052] By adding an air inlet tube between the impeller and the air inlet pipe, the air flowing into the centrifugal fan is filtered during the normal operation of the centrifugal fan to intercept dust, thereby preventing the impeller from being covered with dust and affecting the air outlet effect. After use, when the centrifugal fan is started next time, the filter is cleaned by the wind flow passing through, thereby achieving an automatic cleaning effect.

[0053] In some embodiments, the impeller 11 is injection molded.

[0054] In some embodiments, one end of the air inlet pipe 4 is fitted onto one end of the air inlet cylinder 3 so that the positioning hole 30 overlaps with the connecting hole 40 , and then the bolt 41 is inserted into the overlapping holes and cooperated with the nut 42 to connect the air inlet pipe 4 to the air inlet cylinder 3 .

[0055] In some embodiments, a filter screen 33 whose outer contour is in contact with the inner wall of the air inlet cylinder 3 is arranged inside the air inlet cylinder 3. The filter screen 33 is composed of two fixed parts 33b and a rotating part 33a. The upper and lower fixed parts 33b are respectively in contact with the inner wall of the air inlet cylinder 3. The rotating rod 330 passes through the rotating part 33a, and its upper and lower ends respectively pass through the upper and lower fixed parts 33b and are connected to the air inlet cylinder bearing to form Figure 2 In the state shown, the rotating part 33a is initially located in the same plane as the two fixed parts 33b to form a filter 33 to intercept and filter dust in the air passing through the air inlet pipe 4, so that clean air can pass through the filter and contact the impeller.

[0056] In some embodiments, during the rotation of the impeller 11, an inner gear ring 110 is fixed on the inner wall of one end thereof which is in contact with the air inlet cylinder 3. The inner gear ring 110 meshes with the driving gear 31 to drive the driving gear 31 and the rotating shaft 34 to rotate. Since an overrunning clutch is provided between the rotating shaft 34 and the driving bevel gear 32, when the impeller 11 rotates normally, the rotating shaft 34 rotates while the driving bevel gear 32 is stationary. After the impeller 11 has worked for a period of time, a lot of dust accumulates on the filter screen 33. At this time, the impeller 11 only needs to be turned over a certain number of times, and the inner gear ring 110 meshes with the driving gear 31 to drive the rotating shaft 34 to reverse, and then the driving bevel gear 32 is driven to rotate through the overrunning clutch. At this time, the driven bevel gear 331 rotates with the driving bevel gear 32. Since the rotating rod 33 penetrates the driven bevel gear 331 and is connected to the driven bevel gear 33 1 is fixed, the rotating rod 33 rotates with the driven bevel gear 331, and then the rotating part 33a of the filter 33 rotates 180°. At this time, the rotating part 33a and the two fixed parts 33b are located in the same plane again, and the side of the rotating part 33a that adheres to the dust is close to the wind impeller 11. When the wind impeller is started next time, the airflow flowing into the wind impeller 11 from the air inlet pipe 4 blows out the dust on the rotating part 33a of the filter 33, so that the dust entering the wind impeller 11 is intercepted, and it is prevented that some dust in the humid air will adhere to the wind impeller 11 after working for a long time, and the dust will adhere to the filter 33. After the current work is completed, the rotating part 33a of the filter 33 is rotated, and when the wind impeller 11 is started to draw air next time, the dry dust on the filter is blown out by the airflow, and the filter 33 is cleaned. At this time, the dust will not adhere to the wind impeller 11.

[0057] In some embodiments, a hollow portion is provided on the filter screen 33 so that the driven bevel gear 331 can be placed in the hollow portion, which does not affect the rotation of the driven bevel gear 331 and the rotation of the rotating portion 33 a on the filter screen 33 .

[0058] On the other hand, in at least one embodiment, a centrifugal fan is provided, which adopts the injection molded centrifugal fan blade unit as described above, and the centrifugal fan includes: a motor 2, a base 20 is arranged underneath the motor 2 for supporting the motor 2, and the output end of the motor 2 passes through the fan casing 1 and is connected to an end face of the impeller 11 having a connecting plate to drive the impeller 11 to rotate and discharge the air from the air outlet 10.

[0059] To sum up, by adding an air inlet tube between the impeller and the air inlet pipe, the air flowing into the centrifugal fan is filtered during the normal operation of the centrifugal fan to intercept dust, thereby preventing the impeller from being covered with dust and affecting the air outlet effect. After use, when the centrifugal fan is started next time, the filter is cleaned by the wind flow passing through, thereby achieving an automatic cleaning effect.

[0060] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0062] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An injection molded centrifugal fan unit, characterized in that: include: The wind impeller has a connecting plate on one end surface and a hollowed-out end surface; The center of the connecting plate is connected to the motor; and An interception mechanism is provided at one hollow end of the wind impeller; The interception mechanism is located between the impeller and the air inlet pipe, and is used to connect the impeller and the air inlet pipe, and to filter dust in the flowing air in the air inlet pipe during the rotation of the impeller.

2. The injection molded centrifugal fan unit according to claim 1, characterized in that: The wind impeller is injection molded.

3. The injection molded centrifugal fan unit according to claim 1, characterized in that: The interception mechanism comprises: An air inlet cylinder, one end of which is connected to the hollow end of the wind impeller; and The other end of the air inlet cylinder is connected to the air inlet pipe; A filter is arranged inside the air inlet cylinder.

4. The injection molded centrifugal fan unit according to claim 3, characterized in that: A rotating shaft is arranged on the inner wall of the air inlet cylinder; A driving gear is disposed at one end of the rotating shaft, and a driving bevel gear is disposed at the other end of the rotating shaft; and An overrunning clutch is arranged at the connection between the rotating shaft and the driving bevel gear.

5. The injection molded centrifugal fan unit according to claim 4, characterized in that: An inner tooth ring is arranged on the inner wall of one end of the wind impeller connected to the air inlet cylinder; The driving gear is located on the inner side of the inner gear ring and meshes with the inner gear ring.

6. The injection molded centrifugal fan unit according to claim 5, characterized in that: A rotating rod is vertically arranged inside the filter; The two ends of the rotating rod are respectively connected to the inner wall of the air inlet cylinder; and A through groove is provided at the bottom of the filter screen, and a driven bevel gear is arranged in the through groove; The rotating rod passes through the driven bevel gear.

7. The injection molded centrifugal fan unit according to claim 6, characterized in that: A positioning hole is provided at one end of the air inlet cylinder connected to the air inlet pipe; A connecting hole is arranged at one end of the air inlet pipe connected to the air inlet cylinder.

8. The injection molded centrifugal fan unit according to claim 7, characterized in that: The air inlet cylinder is connected to the air inlet pipe via a connecting mechanism; in The connecting mechanism comprises: Bolts and nuts that fit with the bolts; in The bolt is suitable for passing through the positioning hole and the connecting hole and cooperating with the nut to connect the air inlet cylinder and the air inlet pipe.

9. A centrifugal fan, characterized in that: include: A fan casing is sleeved on the outer side of the fan impeller; as well as The output end of the motor passes through a side wall of the fan housing and is connected to the connecting plate.

10. The centrifugal fan according to claim 9, characterized in that: An injection molded centrifugal fan blade unit as described in any one of claims 1 to 8 is used.