High-efficiency mixed-flow fan

Abstract

The utility model belongs to ventilation technology field provides a kind of high -efficient mixed flow fan, including casing group, impeller and the driving mechanism of driving the rotation of the impeller;The inner chamber of the casing group is equipped with the inner shell for accommodating the driving mechanism, the driving mechanism is arranged in the inner shell, the impeller is located in the inner chamber of the casing group and is connected with the power output piece of the driving mechanism;The first fairing is equipped at the end of the impeller away from the driving mechanism, the cross section of the first fairing in axial direction is arc and protrudes to air inlet end;The second fairing is equipped at the end of the inner shell away from the impeller, along the flow direction of airflow, the cross section of the tail of the second fairing in axial direction is arc and protrudes to air outlet end.The utility model can effectively reduce the interference to airflow, reduce energy loss, and be conducive to improving efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of ventilation and air exchange technology, specifically relating to a high-efficiency mixed-flow fan. Background Technology

[0002] Existing market models of older mixed-flow fans (such as...) Figure 1 To save on mold costs, the impeller shroud and rear guide cone are designed as flat plates. This cost-saving design causes the airflow to be blocked by the flat impeller shroud when entering the impeller, resulting in interference and energy loss with the incoming airflow. When passing through the rear guide cone, the abrupt change in the airflow wall causes the airflow to detach from the airflow wall, generating turbulence and energy loss, thus reducing the efficiency of the fan. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a high-efficiency hybrid fan that can effectively reduce interference with airflow, reduce energy loss, and improve efficiency.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A high-efficiency mixed-flow fan includes a casing assembly, an impeller, and a drive mechanism for driving the impeller to rotate; the inner cavity of the casing assembly is provided with an inner shell for accommodating the drive mechanism, the drive mechanism is disposed in the inner shell, and the impeller is located in the inner cavity of the casing assembly and connected to the power output component of the drive mechanism;

[0006] The impeller is provided with a first guide shroud at the end away from the drive mechanism. The first guide shroud has an arc-shaped cross-section in the axial direction and protrudes towards the air inlet end. The inner shell is provided with a second guide shroud at the end away from the impeller. Along the airflow direction, the tail of the second guide shroud has an arc-shaped cross-section in the axial direction and protrudes towards the air outlet end.

[0007] In a preferred embodiment of this utility model, the first air deflector is spherical in shape.

[0008] Preferably, the first guide shield is detachably connected to the impeller.

[0009] In a preferred embodiment of this utility model, the tail of the second deflector is spherical.

[0010] Preferably, the second flow guide includes a first flow guide portion and a second flow guide portion; the first flow guide portion is connected to the inner shell, the second flow guide portion is connected to the end of the first flow guide portion away from the inner shell, and the second flow guide portion constitutes the tail of the second flow guide.

[0011] The first guide section is cone-shaped.

[0012] In a preferred embodiment of this utility model, the inner shell is cylindrical; the inner shell and the second flow guide cover are combined to form a receiving cavity; the driving mechanism is located in the receiving cavity.

[0013] In a preferred embodiment of this utility model, the drive mechanism is provided with a connecting plate, and the connecting plate is detachably connected to the end of the inner shell near the impeller; the power output component of the drive mechanism passes through the connecting plate and is connected to the impeller.

[0014] In a preferred embodiment of this utility model, a plurality of guide vanes are provided between the outer wall of the inner shell and the inner wall of the housing assembly, and each guide vane is evenly distributed along the circumferential direction.

[0015] In a preferred embodiment of the present invention, the housing assembly includes a main housing and a front air duct; the drive mechanism, the inner housing, and the second air guide are all located inside the main housing, and the impeller and the first air guide are located inside the front air duct.

[0016] In a preferred embodiment of this utility model, the driving mechanism includes a motor.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This utility model discloses a high-efficiency mixed-flow fan. Both the first and second guide shrouds feature an arc-shaped design, effectively allowing airflow to smoothly enter the impeller. This enables efficient static pressure conversion within the casing, ultimately resulting in a stable airflow output. The airflow travels in a gradual, progressive manner, reducing energy loss and effectively improving the overall efficiency of the fan. Furthermore, the first and second guide shrouds can be manufactured using universal molds, saving on mold processing costs. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a cross-sectional view of an older mixed-flow fan (the arrows in the figure indicate the direction of airflow).

[0021] Figure 2 This is a cross-sectional view of the high-efficiency mixed-flow fan of this utility model (the arrows in the figure indicate the direction of airflow).

[0022] Figure 3 This is a side view of the high-efficiency mixed-flow fan of this utility model.

[0023] Figure 4 for Figure 2 Cross-sectional diagram.

[0024] in:

[0025] 1-Casing assembly, 101-Main casing, 102-Front air duct;

[0026] 2-Guide vane;

[0027] 3-Drive mechanism;

[0028] 4-Impeller, 401-Blade, 402-Ring;

[0029] 5-First fairing;

[0030] 6-Second guide fairing, 601-First guide section, 602-Second guide section;

[0031] 7-Inner shell. Detailed Implementation

[0032] To better understand the above-mentioned objectives, features, and advantages of this utility model, it will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of this utility model; the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0034] See Figures 2-4This embodiment discloses a high-efficiency mixed-flow fan, including a casing assembly 1, an impeller 4, and a drive mechanism 3 for driving the impeller 4 to rotate. The inner cavity of the casing assembly 1 is provided with an inner shell 7 for accommodating the drive mechanism 3, and the drive mechanism 3 is disposed within the inner shell 7. The impeller 4 is located within the inner cavity of the casing assembly 1 and is connected to the power output component of the drive mechanism 3. A first guide shroud 5 is provided at the end of the impeller 4 away from the drive mechanism 3. The first guide shroud 5 has an arc-shaped cross-section in the axial direction and protrudes towards the air inlet end. A second guide shroud 6 is provided at the end of the inner shell 7 away from the impeller 4. Along the airflow direction, the tail of the second guide shroud 6 has an arc-shaped cross-section in the axial direction and protrudes towards the air outlet end.

[0035] Furthermore, the first guide shield 5 in this embodiment is spherical in shape. The spherical shape of the first guide shield 5 makes its overall shape more uniform and its outline smoother, which is more conducive to a more stable and balanced airflow entering the housing assembly 1, preventing airflow loss due to backflow. Moreover, the first guide shield 5 and the impeller 4 in this embodiment are detachably connected. The structure of the impeller 4 in this embodiment can refer to the prior art, and the shape and number of the blades 401 of the impeller 4 can be flexibly adjusted. Generally, the impeller 4 includes a ring 402 and multiple blades 401 disposed on the circumferential surface of the ring 402. The ring 402 has a connecting part that connects to the power output component of the drive mechanism 3, allowing the impeller 4 to rotate under the drive of the drive mechanism 3. The detachable connection structure between the first guide shield 5 and the impeller 4 can adopt threaded connection, snap-fit ​​connection, or bolt connection, etc.

[0036] See Figure 2 and Figure 4 The tail of the second deflector 6 is spherical. The spherical shape of the second deflector 6 makes its overall shape more uniform and its outline smoother, which is more conducive to the smooth and even flow of air within the casing assembly 1, and avoids turbulence at the end.

[0037] To further enhance the airflow guiding effect of the second airflow guide 6, this embodiment designs the second airflow guide 6 as a first airflow guide 601 and a second airflow guide 602. The first airflow guide 601 is connected to the inner shell 7, and the second airflow guide 602 is connected to the end of the first airflow guide 601 away from the inner shell 7. The second airflow guide 602 forms the tail of the second airflow guide 6, that is, the second airflow guide 602 is spherical; the first airflow guide 601 is conical. In this embodiment, the first airflow guide 601 and the second airflow guide 602 in the second airflow guide 6 adopt an integrated structure, forming a conical arc-shaped airflow guide, allowing the airflow to pass through smoothly and evenly, and enabling more efficient airflow output. Of course, the first airflow guide 601 and the second airflow guide 602 in this embodiment can also adopt an assembled structure, which can be adjusted according to actual needs.

[0038] In this embodiment, the inner shell 7 is cylindrical; the inner shell 7 and the second flow guide 6 combine to form a receiving cavity; the driving mechanism 3 is located in the receiving cavity. The second flow guide 6 and the inner shell 7 can be fixedly connected or detachably connected.

[0039] Furthermore, the drive mechanism 3 is provided with a connecting plate, which is detachably connected to the end of the inner shell 7 near the impeller 4; the power output component of the drive mechanism 3 passes through the connecting plate and connects to the impeller 4. In this embodiment, the connecting plate and the inner shell 7 can be detachably connected by bolts, screws, or other means. The connecting plate, the inner shell 7, and the second guide shroud 6 combine to form a relatively closed cavity, in which the main body of the drive mechanism 3 is located. This protects the drive mechanism 3 and prevents it from affecting the airflow.

[0040] In this embodiment, a plurality of guide vanes 2 are provided between the outer wall of the inner shell 7 and the inner wall of the housing assembly 1, and each guide vane 2 is evenly distributed along the circumferential direction. The shape and number of the guide vanes 2 in this embodiment can be flexibly adjusted according to the actual situation, and specific details can also be found in the prior art.

[0041] The housing assembly 1 in this embodiment includes a main housing 101 and a front air duct 102; the drive mechanism 3, the inner housing 7 and the second air guide 6 are all located inside the main housing 101, and the impeller 4 and the first air guide 5 are located inside the front air duct 102.

[0042] The drive mechanism 3 in this embodiment can be a motor or other drive source, as can be found in the prior art.

[0043] For other specific embodiments of the high-efficiency mixed-flow fan in this example, please refer to the mixed-flow fans in the prior art.

[0044] In this embodiment, the high-efficiency mixed-flow fan is driven by the drive mechanism 3 to rotate the impeller 4. The airflow enters through the front air duct 102, and enters the flow channel of the impeller 4 in a gradual and progressive manner along the inner wall of the front air duct 102 and the outer wall of the first guide shroud 5 and the space between them. It then flows forward along the flow channel of the guide vanes 2 welded to the housing assembly 1, and then enters the outer wall of the second guide shroud 6, the inner wall of the housing assembly 1 and the space between them. The airflow flows out from the end of the housing assembly 1 in a manner that the airflow cross-section gradually expands.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A high-efficiency mixed-flow fan, characterized in that, It includes a housing assembly, an impeller, and a drive mechanism for driving the impeller to rotate; the housing assembly has an inner shell for accommodating the drive mechanism, the drive mechanism is disposed in the inner shell, and the impeller is located in the inner cavity of the housing assembly and connected to the power output component of the drive mechanism; The impeller is provided with a first guide shroud at the end away from the drive mechanism. The first guide shroud has an arc-shaped cross-section in the axial direction and protrudes towards the air inlet end. The inner shell is provided with a second guide shroud at the end away from the impeller. Along the airflow direction, the tail of the second guide shroud has an arc-shaped cross-section in the axial direction and protrudes towards the air outlet end.

2. The high-efficiency mixed-flow fan according to claim 1, characterized in that, The first air deflector is spherical in shape.

3. The high-efficiency mixed-flow fan according to claim 1 or 2, characterized in that, The first guide shield is detachably connected to the impeller.

4. The high-efficiency mixed-flow fan according to claim 1, characterized in that, The tail of the second fairing is spherical.

5. The high-efficiency mixed-flow fan according to claim 1 or 4, characterized in that, The second flow guide includes a first flow guide portion and a second flow guide portion; the first flow guide portion is connected to the inner shell, and the second flow guide portion is connected to the end of the first flow guide portion away from the inner shell, and the second flow guide portion constitutes the tail of the second flow guide. The first guide section is cone-shaped.

6. The high-efficiency mixed-flow fan according to claim 1, characterized in that, The inner shell is cylindrical; the inner shell and the second flow guide cover are combined to form a receiving cavity; the driving mechanism is located in the receiving cavity.

7. The high-efficiency mixed-flow fan according to claim 1 or 6, characterized in that, The drive mechanism is provided with a connecting plate, which is detachably connected to the end of the inner shell near the impeller; the power output component of the drive mechanism passes through the connecting plate and is connected to the impeller.

8. The high-efficiency mixed-flow fan according to claim 1, characterized in that, Multiple guide vanes are provided between the outer wall of the inner shell and the inner wall of the housing assembly, and each guide vane is evenly distributed along the circumferential direction.

9. The high-efficiency mixed-flow fan according to claim 1, characterized in that, The housing assembly includes a main housing and a front air duct; the drive mechanism, inner housing, and second air guide are all located inside the main housing, and the impeller and the first air guide are located inside the front air duct.

10. The high-efficiency mixed-flow fan according to claim 1, characterized in that, The drive mechanism includes a motor.

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