Double-layer flow impeller assembly and air blower

Abstract

The utility model provides a double-layer flow impeller assembly and an air blower. The double-layer flow impeller assembly comprises an upper impeller, a lower impeller and a flow guide cover. The upper impeller comprises a first fixing ring and a plurality of first blades, the first fixing ring is connected with one ends of the first blades, and the first blades form an annular structure with an axis; the lower impeller comprises a second fixing ring and a plurality of second blades, the second fixing ring is connected with one ends of the second blades, and the second blades form an annular structure with an axis; the flow guide cover comprises an annular body, a flow guide cylinder connected with the inner diameter of the annular body and a driven part connected with the inner wall of the flow guide cylinder. The two end faces of the annular body are connected with the other ends of the first blades and the other ends of the second blades correspondingly, and the driven part is used for being connected with an output shaft of an air blowing motor. The impeller assembly adopts the impeller with a double-layer structure, and the flow guide cover is added to isolate air flow inside and outside the air inlet, so that the function of upper and lower double-layer flow is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of air blower, concretely relates to a double -layer flow impeller assembly and air blower. BACKGROUND

[0002] Air blower is the key part of automobile air conditioning system, and is very important to the influence of vehicle comfort, safety, noise, vibration and harshness (Noise, Vibration, Harshness, NVH), especially in winter, both to ensure the defrosting function of the whole vehicle, and to ensure the comfort of the driver's face, so the air conditioning box can provide cold air and hot air at the same time.

[0003] Generally, double-motor air supply or double-layer flow design is carried out. At present, there are mainly two kinds of double-layer flow structures: up-down channel air inlet type double-layer flow design and up channel air inlet design. The up-down channel air inlet type double-layer flow design needs to reserve a certain space at the bottom of the fan blade, which leads to the large overall size of the air blower, which is contrary to the requirement of miniaturization of the whole vehicle parts. The up channel air inlet design is difficult to process, cannot realize integrated molding, needs secondary welding, and has complex process and high cost. Designing an impeller assembly to improve the performance of the air blower has been the research direction in the field.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the utility model, and therefore can include information that does not constitute prior art known to those skilled in the art. CONTENT OF THE UTILITY MODEL

[0005] In view of the problems in the prior art, the purpose of the utility model is to provide a double-layer flow impeller assembly and an air blower, and the double-layer structure of the impeller assembly and the flow guide cylinder of the flow guide cover are designed to realize the up-down layer separation of air flow.

[0006] The first aspect of the utility model provides a double-layer flow impeller assembly, which comprises an upper impeller, a lower impeller and a flow guide cover.

[0007] The upper impeller comprises a first fixed ring and a plurality of first blades, the first fixed ring connects one end of the plurality of first blades, and the plurality of first blades form a ring structure with an axis.

[0008] The lower impeller comprises a second fixed ring and a plurality of second blades, the second fixed ring connects one end of the plurality of second blades, and the plurality of second blades form a ring structure with an axis.

[0009] The flow guide cover comprises a ring body, a flow guide cylinder connected with the inner diameter of the ring body, and a driven part connected with the inner wall of the flow guide cylinder.

[0010] Both end surfaces of the annular body are respectively connected to the other ends of the plurality of first blades and the other ends of the plurality of second blades, and the driven portion is used to connect to the output shaft of the blower motor.

[0011] According to the first aspect of the present utility model, the guide cylinder extends along the axis of the impeller assembly.

[0012] According to the first aspect of the present utility model, the guide cylinder is arranged on a side of the annular body facing the air inlet of the blower.

[0013] According to the first aspect of the present invention, the outer diameter of the annular body is R, and the inner diameter of the annular body is r, and r / R is in the range of 1 / 4 to 3 / 5.

[0014] According to the first aspect of the present utility model, the driven part includes a connecting part for connecting to the output shaft of the blower motor and a plurality of supporting ribs connecting the connecting part and the inner wall of the guide cylinder.

[0015] According to the first aspect of the present invention, the annular body is perpendicular to the axis of the impeller assembly, and the angle β between the support rib and the annular body is between 30° and 60°.

[0016] According to the first aspect of the present invention, the plurality of support ribs form an arc-shaped surface.

[0017] According to the first aspect of the present invention, the double-layer flow impeller assembly is formed into an integrated piece.

[0018] A second aspect of the present invention provides a blower, which includes the double-layer flow impeller assembly.

[0019] The impeller assembly of the utility model adopts an impeller with a double-layer structure, and adds a guide cover to isolate the wind flow inside and outside the air inlet. The guide cylinder of the guide cover allows the wind flow to enter the lower impeller through the hollow hole and diffuse outward, and the wind flow outside the guide cover diffuses outward through the upper impeller, thereby realizing the function of upper and lower double-layer flow. At the same time, it has the advantages of simple specific process, small size and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings.

[0021] Figure 1 This is a schematic structural diagram of a double-layer flow impeller assembly according to an embodiment of the present invention;

[0022] Figure 2 A cross-sectional view of a double-flow impeller assembly according to an embodiment of the present invention; and

[0023] Figure 3 A fluid schematic diagram of a double-layer flow impeller assembly according to an embodiment of the present application.

[0024] Reference signs

[0025] 11 first fixing ring

[0026] 12 first blade

[0027] 21 second fixing ring

[0028] 22 second blade

[0029] 31 annular body,

[0030] 32 guide cylinder

[0031] 331 connecting portion

[0032] 332 support rib DETAILED DESCRIPTION

[0033] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings. Example embodiments, may, however, be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. Embodiments described below are examples only, and are not exhaustive of possible embodiments, as the present application is capable of being embodied in many different forms. In the drawings, the same reference numerals are used throughout several views to refer to same or like components.

[0034] In the description of the present application, it is to be understood that the terms "first", "second", "third" and the like, merely identify features being referred to and do not imply or imply relative importance or a number of the features being referred to. Thus, a feature identified as "first" or "second" can implicitly or explicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0035] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0037] The structure of the double-layer flow impeller assembly and the blower of the present application is further described below in combination with the drawings and specific embodiments. It can be understood that each specific embodiment does not limit the protection scope of the present application.

[0038] Figure 1 And Figure 2 are respectively the structural schematic diagram and the cross-sectional view of the double-layer flow impeller assembly of an embodiment of the present application. Specifically, the double-layer flow impeller assembly comprises an upper impeller, a lower impeller and a flow guide cover. The upper impeller comprises a first fixed ring 11 and a plurality of first blades 12, the first fixed ring 11 connects one end of the plurality of first blades 12, and the plurality of first blades 12 are formed into a ring structure with an axis, Figure 1 In the embodiment of the present application, the first fixed ring 11 of the circular ring structure is fixedly connected to the outer side of the upper end of the plurality of first blades 12. The lower impeller comprises a second fixed ring 21 and a plurality of second blades 22, the second fixed ring 21 connects one end of the plurality of second blades 22, and the plurality of second blades 22 are formed into a ring structure with an axis, Figure 1 In the embodiment of the present application, the second fixed ring 21 of the circular ring structure is fixedly connected to the outer side of the lower end of the plurality of second blades 22. Generally, the axis coincides with the axis XX of the double-layer flow impeller assembly, that is, the first fixed ring 11 / second fixed ring 21 is collinear with the axis of the ring structure of the first blade 12 / second blade 22, which is beneficial to improve the consistency of the overall structure of the double-layer flow impeller assembly. The plurality of first blades 12 or the plurality of second blades 22 are arranged at intervals around the axis, and the extension direction of the blades can be parallel to the axis XX. The axis direction is the height direction of the upper impeller or the lower impeller, and the structures of the upper impeller and the lower impeller are the same, and the heights of the two can be the same or different, which can be set according to the size of the upper and lower air flows.

[0039] The flow guide cover comprises a ring body 31, a flow guide cylinder 32 connected to the inner diameter of the ring body 31, and a driven part connected to the inner wall of the flow guide cylinder 32; the two end faces of the ring body 31 are respectively connected to the other end of the plurality of first blades 12 and the other end of the plurality of second blades 22, and the driven part is used to connect the output shaft of the blower motor.

[0040] The impeller assembly of the present invention adopts a double-layer design of upper and lower impellers. The upper and lower impellers are connected by the annular body 31 of the air guide cover. The air guide cover also isolates the airflow inside and outside the air inlet. Part of the airflow at the air inlet is diffused outward through the multiple first blades 12 of the upper impeller. At the same time, the guide cylinder 32 of the air guide cover allows the airflow to enter the lower impeller through its hollow part and diffuse outward through the multiple second blades 22, thereby realizing the function of upper and lower double-layer flow. In addition, the double-layer flow impeller assembly has the advantages of simple specific process, small size and low cost.

[0041] Furthermore, the wall of the guide cylinder 32 extends along the axis XX of the double-layer flow impeller assembly, and is arranged on the side of the annular body 31 facing the air inlet of the blower. Figure 3 Schematic diagram of the flow of a double-layer flow impeller assembly according to an embodiment of the present invention. When the annular body 31 is a circular ring perpendicular to the axis XX, the wall of the flow guide cylinder 32 can be perpendicular to the annular surface of the annular body 31 or form a certain angle with the annular body 31.

[0042] exist Figure 1 and Figure 2 In an embodiment, the driven part includes a connecting portion 331 for connecting to the output shaft of the blower motor and a plurality of support ribs 332 connecting the connecting portion 331 and the inner wall of the guide cylinder 32. The connecting portion 331 is arranged at the center of the guide cylinder 32, through which the output shaft of the blower motor can be passed. The plurality of support ribs 332 are evenly arranged circumferentially in the guide cylinder 32, and the plurality of support ribs 332 form a circular arc surface, or in other words, the plurality of support ribs 332 can be regarded as a hollow structure formed by removing part of the fan-shaped surface from a circular arc surface. The angle between the support rib 332 (the connecting line between the two ends of the support rib) and the annular body 31 is β, and preferably, the angle β is between 30° and 60°. The plurality of support ribs 332 forming an angle β with the annular body 31 can reduce wind resistance. At the same time, the circular arch structure increases the strength of the connection part and improves the stability of the impeller assembly after being connected to the output shaft of the blower motor. The number of the plurality of support ribs 332 may be 6 or 8, which is not limited here.

[0043] The size of the guide cylinder 32 of the air deflector determines the amount of airflow that can pass through it, that is, it determines the ratio between the upper and lower laminar flows. The outer diameter of the annular body 31 is R, and the inner diameter of the annular body 31 (which can be regarded as the radius of the guide cylinder 32) is r, satisfying r / R in the range of 1 / 4 to 3 / 5. The above values ​​can be determined based on the application scenario and specific structure of the blower or determined by multiple experiments.

[0044] The double-layer flow impeller assembly of the present invention can be a single piece and can be made of a modified material of PP plus GF20. The modified material of PP plus GF20 is a plastic material made by mixing polypropylene (PP) with 20% glass fiber reinforced material (GF20) and has high strength, hardness, and temperature resistance.

[0045] The utility model also provides a blower, which includes the double-layer flow impeller assembly and a blower motor and other components. The output shaft of the blower motor is connected to the connecting part in the center of the air guide cover, so that the rotation of the blower motor drives the rotation of the double-layer flow impeller assembly. This blower is suitable for automobile air-conditioning systems. The blower with upper and lower double-layer airflows realizes the air flow diversion function of the air-conditioning box of the automobile air-conditioning system. When using the automobile air-conditioning system in winter, it can defog the front windshield while ensuring the comfort of the passengers' faces, taking into account the safety and comfort of automobile driving.

[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

[0047] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A double-layer flow impeller assembly, characterized in that: Including upper impeller, lower impeller and guide cover; The upper impeller includes a first fixing ring and a plurality of first blades, wherein the first fixing ring is connected to one end of the plurality of first blades, and the plurality of first blades are formed into a ring structure having an axis; The lower impeller includes a second fixing ring and a plurality of second blades, wherein the second fixing ring is connected to one end of the plurality of second blades, and the plurality of second blades are formed into an annular structure having an axis; The deflector includes an annular body, a deflector cylinder connected to the inner diameter of the annular body, and a driven part connected to the inner wall of the deflector cylinder; The two end surfaces of the annular body are respectively connected to the other ends of the plurality of first blades and the other ends of the plurality of second blades, and the driven part is used to connect to the output shaft of the blower motor.

2. The double-layer flow impeller assembly according to claim 1, characterized in that: The guide cylinder extends along the axis of the impeller assembly.

3. The double-layer flow impeller assembly according to claim 1, characterized in that: The guide cylinder is arranged on a side of the annular body facing the air inlet of the blower.

4. The double-layer flow impeller assembly according to claim 1, characterized in that: The outer diameter of the annular body is R, and the inner diameter of the annular body is r, and r / R is in the range of 1 / 4 to 3 / 5.

5. The double-layer flow impeller assembly according to claim 1, characterized in that: The driven part includes a connecting part for connecting to the output shaft of the blower motor and a plurality of supporting ribs connecting the connecting part and the inner wall of the guide cylinder.

6. The double-layer flow impeller assembly according to claim 5, characterized in that: The annular body is perpendicular to the axis of the impeller assembly, and the angle β between the support rib and the annular body is between 30° and 60°.

7. The double-layer flow impeller assembly according to claim 5, characterized in that: A plurality of support ribs form an arc-shaped surface.

8. The double-layer flow impeller assembly according to claim 1, characterized in that: The double-layer flow impeller assembly is an integrated piece.

9. A blower, characterized in that: The blower includes the double-layer flow impeller assembly according to any one of claims 1 to 8.

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