Low-wind-resistance air duct assembly and air purifier

Abstract

According to the low-wind-resistance air duct assembly, connecting ribs are arranged to be in a plate shape, so that the connecting ribs have enough strength to fix a motor installation base under the condition that the thickness is small, meanwhile, connecting arms are arranged to be perpendicular to blades, wind resistance caused by the connecting ribs can be effectively reduced, and the wind resistance of the motor installation base is effectively reduced. Therefore, the air duct assembly can have low air resistance and has good supporting and fixing effects on the motor. The air purifier provided by the utility model has the advantages of small wind resistance and low noise by adopting the low-wind-resistance air duct assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of air purification, especially relates to a low wind resistance air duct assembly and air purifier. BACKGROUND

[0002] In prior art, the air duct assembly used by the air purifier, the motor is connected to the center of the air duct shell piece by multiple connecting ribs, the connecting ribs are located at the air outlet of the air duct assembly, which will cause certain hindrance to the wind blown by the fan, and the connecting ribs need to have certain structural strength to stabilize the motor, and also cannot be set too slender.

[0003] At present, there is a lack of an air duct assembly with low wind resistance and good supporting and fixing effect for the motor. UTILITY MODEL CONTENTS

[0004] In view of the problems in prior art, the main purpose of the utility model is to provide a low wind resistance air duct assembly, which has low wind resistance and good supporting and fixing effect for the motor.

[0005] To achieve the above-mentioned purpose, the low wind resistance air duct assembly comprises an air duct body, a fan blade is arranged at the air inlet of the air duct body, a motor mounting seat is arranged at the air outlet of the air duct body, and the motor mounting seat is connected to the inner cavity wall of the air duct body through multiple connecting arms.

[0006] In some optional embodiments, the connecting arm comprises two first connecting plates and second connecting plates which are parallel to each other.

[0007] In some optional embodiments, the first connecting plate and the second connecting plate have multiple first connecting ribs therebetween.

[0008] In some optional embodiments, the first connecting plate and the second connecting plate have a second connecting rib therebetween, and the second connecting rib is connected to the first connecting rib.

[0009] In some optional embodiments, the air outlet of the air duct body has four evenly distributed angle positions, and each angle position is provided with a connecting arm.

[0010] In some optional embodiments, the end surface of the connecting arm facing the fan blade is an arc surface.

[0011] In some optional embodiments, the thickness of the first connecting plate and the second connecting plate is 2-3mm.

[0012] In addition, the utility model also provides an air purifier comprising the low wind resistance air duct assembly according to any one of the above embodiments.

[0013] Compared with the prior art, the low wind resistance air duct assembly has the advantages that the connecting rib is provided in a plate shape, so that the connecting rib has sufficient strength to fix the motor mounting seat under the condition of thin thickness, meanwhile, the connecting arm is provided perpendicularly to the blade, so that the wind resistance of the connecting rib is effectively reduced, so that the air duct assembly can have low wind resistance and has good supporting and fixing effect on the motor.

[0014] The air purifier has the advantages of low wind resistance and low noise. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The utility model provides a three -dimensional schematic view of air duct assembly for the embodiment of the utility model;

[0016] Figure 2 It is the internal schematic view of air duct assembly;

[0017] Figure 3 It is the inclination schematic view of connecting arm and fan blade;

[0018] Figure 4 It is the local schematic view of air duct assembly. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] Referring to Figures 1-2 In the embodiments of the utility model, an air duct assembly is provided, which comprises an air duct body 10, the air inlet of the air duct body 10 is provided with a fan blade 20, the air outlet 11 of the air duct body 10 is provided with a motor mounting seat 12, and the motor mounting seat 12 is connected with the inner cavity wall of the air duct body 11 through a plurality of connecting arms 13. The blade of the fan blade 20 is an inclined blade, and the connecting arm 13 is plate-shaped and perpendicular to the blade.

[0021] In the embodiments, the blade is a curved surface modeling, in order to understand the inclination angle of the blade and the perpendicular relationship between the connecting arm and the blade, the following will be specifically described in conjunction with the drawings.

[0022] Referring to Figure 3The intersection of the upper edge of the blade and the side edge (the side of the blade far from the center of the fan) is the first end point, and the intersection of the lower edge of the blade and the side edge is the second end point. The angle a between the first end point and the second end point and the radial plane M1 of the fan is the angle of inclination of the blade. A plane parallel to the surface of the central region of the blade is the blade surface S1. The perpendicular relationship of the connecting arm 13 with respect to the blade is defined as follows: when the blade rotates to the state in which the central region of the blade points in the normal direction of the connecting arm 13, a plane S2 parallel to the connecting arm is drawn, and the angle β between the plane S2 and the blade surface S1 is 90°.

[0023] When the fan blade 20 rotates to overcome air resistance, the air obtains kinetic energy in the same direction as the vertical direction of the inclined surface of the fan blade. By arranging the connecting arm 13 perpendicular to the blade, the wind resistance caused by the connecting arm 13 can be reduced. At the same time, the connecting arm has a plate structure, which has sufficient strength to fix the motor mounting seat 12 even if the thickness is thin. Thus, the air duct assembly can have low wind resistance and good support and fixing effect on the motor.

[0024] Preferably, the connecting arm 13 includes at least two parallel plate structures with a ventilation gap between the two plate structures. Specifically, referring to Figure 4 , the connecting arm 13 includes two parallel first connecting plates 131

[0025] and second connecting plates 132, and the gap between the first connecting plates 131 and the second connecting plates 132 is between 30 mm and 40 mm, which ensures the structural strength of each connecting arm 13 and the ventilation effect between the connecting plates.

[0026] In this embodiment, the thickness of the first connecting plates 131 and the second connecting plates 132 is 2-4 mm to ensure the strength of the single plate.

[0027] Further, a plurality of first connecting ribs 133 are arranged between the first connecting plates 131 and the second connecting plates 132. Specifically, referring to Figure 4 , three first connecting ribs 133 are arranged between the first connecting plates 131 and the second connecting plates 132, and the two ends of each first connecting rib 133 are connected to the first connecting plates 131 and the second connecting plates 132, respectively, and are perpendicular to the first connecting plates 131 and the second connecting plates 132 to further strengthen the structural strength of the connecting arm 13.

[0028] Further, a second connecting rib 134 is arranged between the first connecting plates 131 and the second connecting plates 132, and the second connecting rib 134 is connected to the first connecting rib 133. Specifically, referring to Figure 4The two ends of the second connecting rib 134 are connected to the inner wall of the air duct body 10 and the motor mounting seat 12 respectively, the body of the second connecting rib 134 is connected to the middle points of the three first connecting ribs 133 and is perpendicular to the first connecting ribs 133, further strengthening the structural strength of the connecting arm 13.

[0029] Referring to Figure 1 In the embodiment, the air outlet of the air duct body 10 is square, four evenly distributed corner positions are formed, and the connecting arm 13 is arranged at each corner position. By arranging the connecting position of the connecting arm 13 and the air duct body 10 at the corner position of the air outlet 11, good support can be provided for each connecting arm 13.

[0030] In addition, in the embodiment, the end face of each connecting arm 13 facing the fan blade 20 is an arc-shaped face. Specifically, the joint angle between the lower end face and the side wall face of the connecting arm 13 is chamfered, so that the lower end face of the connecting arm 13 forms an arc-shaped face, further reducing the wind resistance of the connecting arm 13.

[0031] The utility model also provides a kind of air purifier, including the low wind resistance air duct subassembly of any one embodiment as above. By using above-mentioned low wind resistance air duct subassembly, it has the advantages of small wind resistance, low noise.

[0032] The above is only preferred embodiment of the utility model, and is not used to the utility model, any slight modification, equivalent replacement and improvement according to the technical essence of the utility model to the above embodiment should be included in the protection scope of the utility model technical scheme.

Claims

1. A low-resistance air duct assembly, comprising an air duct body, wherein a fan blade is provided at the air inlet of the air duct body, and a motor mounting base is provided at the air outlet of the air duct body, the motor mounting base being connected to the inner wall of the air duct body via multiple connecting arms; characterized in that, The fan blades are inclined blades, and the connecting arm is plate-shaped and perpendicular to the blades.

2. The low wind resistance duct assembly as described in claim 1, characterized in that, The connecting arm includes two parallel connecting plates: a first connecting plate and a second connecting plate.

3. The low-resistance duct assembly as described in claim 2, characterized in that, The thickness of the first connecting plate and the second connecting plate is 2-4mm.

4. The low wind resistance duct assembly as described in claim 2, characterized in that, There are multiple first connecting ribs between the first connecting plate and the second connecting plate.

5. The low wind resistance duct assembly as described in claim 4, characterized in that, A second connecting rib is provided between the first connecting plate and the second connecting plate, and the second connecting rib is connected to the first connecting rib.

6. The low wind resistance duct assembly as described in claim 1, characterized in that, The air outlet of the duct body has four evenly distributed corner positions, and each corner position is provided with a connecting arm.

7. The low wind resistance duct assembly as described in claim 1, characterized in that, The end face of the connecting arm facing the fan blade is an arc-shaped surface.

8. An air purifier, characterized in that, Includes the low-resistance duct assembly as described in any one of claims 1-7.

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