Fan

Abstract

This invention relates to a fan. The impeller of the fan includes a frame, with a first connecting portion and a second connecting portion at its two axial ends. A partition portion is located between the first and second connecting portions on the frame. A first mounting cavity is formed between the first connecting portion and the partition portion, and a second mounting cavity is formed between the second connecting portion and the partition portion. Multiple blades are circumferentially arranged within the first and second mounting cavities. By providing two sets of blades that are staggered, and each blade having a bent portion and a base, with the larger ends of the bent portion and the base portion connected to the partition portion, the airflow can be significantly increased.

Description

Technical Field

[0001] The invention relates to the field of fan manufacturing, in particular to a fan. Background Art

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. A fan generally includes a volute, in which an impeller is arranged. The impeller is mounted on a rotating shaft, and the rotating shaft is driven by an external motor drive assembly. The rotation of the rotating shaft can drive the impeller to rotate, and the air can be delivered to the air outlet of the volute with the help of the rotation of the impeller. The traditional impeller includes a wheel frame, and a plurality of blades are arranged along the circumference of the wheel frame. Each blade is roughly rectangular. Each blade is inclined toward the inside of the wheel frame. With the continuous development of technology, the air output of this traditional impeller can no longer meet the existing demand when it is used. Summary of the invention

[0003] Based on this, a fan is provided to help increase the air output.

[0004] A fan, comprising a volute and an impeller arranged in the volute, the volute comprising two oppositely arranged air inlets, namely a first air inlet and a second air inlet, the volute further comprising an air outlet, the impeller comprising a wheel frame, the two axial ends of the wheel frame being respectively a first connecting portion and a second connecting portion, a partition portion being located between the first connecting portion and the second connecting portion on the wheel frame, a first installation cavity being formed between the first connecting portion and the partition portion, a second installation cavity being formed between the second connecting portion and the partition portion, a plurality of blades being circumferentially arranged in the first installation cavity, and a plurality of blades being circumferentially arranged in the second installation cavity;

[0005] The blade in the first installation cavity includes a base portion and a bent portion, the base portion and the bent portion form a certain angle, the base portion is inclined toward the inside of the first installation cavity, the bent portion extends toward the inside of the first installation cavity, the large end of the base portion is connected to the partition portion, the small end of the base portion is connected to the first connecting portion, the large end of the bent portion is connected to the partition portion, and the small end of the bent portion is connected to the first connecting portion;

[0006] The blade in the second installation cavity includes a base portion and a bent portion, the base portion and the bent portion form a certain angle, the base portion is inclined toward the inside of the second installation cavity, the bent portion extends toward the inside of the second installation cavity, the large end of the base portion is connected to the partition portion, the small end of the base portion is connected to the second connecting portion, the large end of the bent portion is connected to the partition portion, and the small end of the bent portion is connected to the second connecting portion;

[0007] The blades of the first installation cavity and the blades of the second installation cavity are arranged in a staggered manner.

[0008] The impeller is provided with two groups of blades, which are staggered, and each blade is provided with a bending portion and a base portion. The large ends of the bending portion and the base portion are respectively connected to the partition portion, and the base portion is inclined toward the corresponding installation cavity, which can significantly increase the air output.

[0009] In one embodiment, the angle between the base and the bent portion of the blade in the first installation cavity is 140 degrees to 170 degrees, and the angle between the base and the bent portion of the blade in the second installation cavity is 140 degrees to 170 degrees.

[0010] In one embodiment, the thickness of the blade in the first mounting cavity increases sequentially from one end of the base portion away from the bending portion to one end of the bending portion away from the base portion, and the thickness of the blade in the second mounting cavity increases sequentially from one end of the base portion away from the bending portion to one end of the bending portion away from the base portion.

[0011] In one embodiment, the blades in the first installation cavity are evenly distributed along the circumference of the first installation cavity, and the blades in the second installation cavity are evenly distributed along the circumference of the first installation cavity.

[0012] In one embodiment, the fan also includes a first air collector and a second air collector arranged inside the volute, the first air collector is installed at the first air inlet of the volute, and the first air collector is connected to the first connecting part, and the second air collector is installed at the second air inlet of the volute, and the second air collector is connected to the second connecting part.

[0013] In one embodiment, a first guide plate is arranged between the first air collector and the first connecting part, and the distance between one end of the first guide plate close to the inclined side wall of the first connecting part and the inclined side wall of the first connecting part is 1cm-2cm, and a second guide plate is arranged between the second air collector and the second connecting part, and the distance between one end of the second guide plate close to the inclined side wall of the second connecting part and the inclined side wall of the second connecting part is 1cm-2cm.

[0014] In one of the embodiments, the guide plate includes a guide plate body, and the guide plate body includes a guide portion and a support portion. A guide fixing plate and a support fixing plate are respectively provided at both ends of the guide plate body in the length direction to facilitate fixing the guide plate body; one side of the guide fixing plate and the support fixing plate of the guide plate body is arc-shaped, and the other side is broken line-shaped; both the guide fixing plate and the support fixing plate are provided with fixing holes.

[0015] In one of the embodiments, a side fixing plate is further provided on one arc-shaped side of the guide plate body, a fixing hole is provided on the side fixing plate for easy fixing, a notch is provided at one end of the connection between the side fixing plate and the guide plate body, a rib is provided between the side fixing plate and the guide plate body, a notch is provided at one end of the guide fixing plate and the support fixing plate at the connection with the guide plate body, ribs are provided at the connection between the guide fixing plate and the support fixing plate and the guide plate body, and the guide plate body is provided with a rib.

[0016] In one of the embodiments, a first plate body and a second plate body are respectively provided at both ends of the bottom of the air outlet, one end of the first plate body is connected to the side wall of the volute, one end of the second plate body is connected to the other side wall of the volute, and a trapezoidal air outlet area with a larger upper end and a smaller lower end is provided between the first plate body and the second plate body, the top surface of the first plate body is an inclined surface inclined toward the air outlet area, and the top surface of the second plate body is an inclined surface inclined toward the air outlet area. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of a fan according to an embodiment of the present invention.

[0018] Figure 2 This is a side view of a wind turbine according to an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the connection between the impeller of the fan, the wind collector and the guide plate according to an embodiment of the present invention.

[0020] Figure 4 Schematic diagram of an impeller of a fan according to an embodiment of the present invention.

[0021] Figure 5 It is a schematic diagram of the bending portion and the base portion of the fan blade according to an embodiment of the present invention.

[0022] Figure 6 It is a schematic diagram showing the gradual change in thickness of the fan blades according to an embodiment of the present invention.

[0023] Figure 7 This is a schematic diagram showing that the blades of the impeller of the fan according to an embodiment of the present invention are arranged tilted toward the installation cavity, and the base portion and the bent portion of the blade have a certain angle.

[0024] Figure 8 It is a schematic diagram of the unfolded state of the guide plate of the fan according to an embodiment of the present invention.

[0025] Fig. 9 It is a schematic diagram of the bending state of the guide plate of the fan according to an embodiment of the present invention.

[0026] in:

[0027] 11. guide part 12. support part 21. guide fixing plate

[0028] 22, support fixing plate 24, side fixing plate 31, notch

[0029] 32, rib 110, volute 111, mounting plate

[0030] 112, air outlet 113, first air inlet 120, support frame

[0031] 130, rotating shaft 131, bearing 132, bearing seat

[0032] 141. First air collector 142. Second air collector

[0033] 161, first plate 162, second plate 163, air outlet area

[0034] 171, first guide plate 172, second guide plate

[0035] 151, first connection part 152, second connection part 153, partition part

[0036] 154, first installation cavity 155, second installation cavity 156, blade

[0037] 156a, base portion 156b, bending portion DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0039] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0041] like Figure 1As shown, an embodiment of the present invention provides a fan, which includes a volute 110 and an impeller arranged in the volute 110, the volute 110 includes two oppositely arranged air inlets, namely a first air inlet 113 and a second air inlet (arranged on the other side opposite to the first air inlet), and the volute 110 also includes an air outlet 112. An annular mounting plate 111 can be arranged at the air outlet 112 of the volute 110, and a bolt through hole is arranged on the mounting plate 111. The mounting plate 111 is used when connecting the volute 110 with other equipment. The impeller is mounted on the rotating shaft 130. Bearings 131 are installed at both ends of the rotating shaft 130, and the bearings 131 are installed on the bearing seat 132. The bearing seat 132 is installed on the support frame 120 outside the volute 110. The end of the rotating shaft 130 can be connected to the motor drive mechanism. The rotating shaft 130 can be driven to rotate by the motor drive mechanism, thereby driving the impeller to rotate. The impeller can send the airflow flowing in from the two air inlets to the air outlet 112 .

[0042] The impeller includes a wheel frame, and the axial ends of the wheel frame are respectively a first connecting part 151 and a second connecting part 152. A partition part 153 is located between the first connecting part 151 and the second connecting part 152 on the wheel frame. A first installation cavity 154 is formed between the first connecting part 151 and the partition part 153, and a second installation cavity 155 is formed between the second connecting part 152 and the partition part 153. A plurality of blades 156 are circumferentially arranged in the first installation cavity 154, and a plurality of blades 156 are circumferentially arranged in the second installation cavity 155.

[0043] The blade 156 in the first mounting cavity 154 includes a base portion 156a and a bending portion 156b, and there is a certain angle between the base portion 156a and the bending portion 156b. The base portion 156a is inclined toward the inner side of the first mounting cavity 154, and the bending portion 156b extends toward the inner side of the first mounting cavity 154. The large end of the base portion 156a is connected to the partition portion 153, and the small end of the base portion 156a is connected to the first connecting portion 151. The large end of the bending portion 156b is connected to the partition portion 153, and the small end of the bending portion 156b is connected to the first connecting portion 151.

[0044] The blade 156 in the second mounting cavity 155 includes a base portion 156a and a bending portion 156b, and there is a certain angle between the base portion 156a and the bending portion 156b. The base portion 156a is inclined toward the inner side of the second mounting cavity 155, and the bending portion 156b extends toward the inner side of the second mounting cavity 155. The large end of the base portion 156a is connected to the partition portion 153, and the small end of the base portion 156a is connected to the second connecting portion 152. The large end of the bending portion 156b is connected to the partition portion 153, and the small end of the bending portion 156b is connected to the second connecting portion 152.

[0045] The blades 156 of the first installation cavity 154 and the blades 156 of the second installation cavity 155 are staggered.

[0046] The above-mentioned impeller is provided with two groups of blades 156, the two groups of blades 156 are staggered, and each blade 156 is provided with a bending portion 156b and a base portion, the large ends of the bending portion 156b and the base portion 156a are respectively connected to the partition portion 153, and the base portion 156a is inclined toward the inside of the corresponding installation cavity, which can significantly increase the air output.

[0047] In this embodiment, the angle between the base portion 156a and the bending portion 156b of the blade 156 in the first installation cavity 154 is 140 degrees to 170 degrees, and the angle between the base portion 156a and the bending portion 156b of the blade 156 in the second installation cavity 155 is 140 degrees to 170 degrees.

[0048] For example, Figure 7 In the embodiment, the angle b between the base portion 156a and the bent portion 156b of the blade 156 in the first installation cavity 154 can be 140 degrees, 150 degrees, 160 degrees, 170 degrees, etc. The angle b between the base portion 156a and the bent portion 156b of the blade 156 in the second installation cavity 155 is 140 degrees, 150 degrees, 160 degrees, 170 degrees, etc.

[0049] In this embodiment, the thickness of the blade 156 in the first installation cavity 154 increases from one end of the base 156a away from the bending portion 156b to one end of the bending portion 156b away from the base 156a, and the thickness of the blade 156 in the second installation cavity 155 increases from one end of the base 156a away from the bending portion 156b to one end of the bending portion 156b away from the base 156a. That is, the thickness of the entire blade 156 has a trend of gradually becoming thicker from one end of the base 156a to one end of the bending portion 156b. This is conducive to the long-term stable operation of the blade 156.

[0050] In this embodiment, the blades 156 in the first installation cavity 154 are evenly distributed along the circumference of the first installation cavity 154 , and the blades 156 in the second installation cavity 155 are evenly distributed along the circumference of the first installation cavity 154 .

[0051] Specifically, the first installation cavity 154 and the second installation cavity 155 may be a cylindrical cavity, and the blades 156 in each installation cavity are evenly distributed along the circumference of the cylindrical cavity.

[0052] In this embodiment, the fan also includes a first air collector 141 and a second air collector 142 arranged inside the volute 110, the first air collector 141 is installed at the first air inlet 113 of the volute 110, and the first air collector 141 is connected to the first connecting part 151, and the second air collector 142 is installed at the second air inlet of the volute 110, and the second air collector 142 is connected to the second connecting part 152.

[0053] In this embodiment, a first guide plate 171 is arranged between the first air collector 141 and the first connecting portion 151, and the distance between the end of the first guide plate 171 close to the inclined side wall of the first connecting portion 151 and the inclined side wall of the first connecting portion 151 is 1cm-2cm, and a second guide plate 172 is arranged between the second air collector 142 and the second connecting portion 152, and the distance between the end of the second guide plate 172 close to the inclined side wall of the second connecting portion 152 and the inclined side wall of the second connecting portion 152 is 1cm-2cm. The above arrangement makes the guide plates as close to the inclined side wall of the corresponding connecting portion as possible. Through testing, this can significantly reduce turbulence, make the airflow more concentrated, and thus help to increase the air output.

[0054] In this embodiment, the deflector includes a deflector body, and the deflector body includes a deflector portion 11 and a support portion 12. The deflector body is bent by a bending machine, and the deflectors are installed on both sides of the impeller in the fan. The air on both sides of the impeller in the fan will flow toward the air outlet 112 along the direction of the deflector portion 11, greatly reducing the air entering the volute 110, thereby improving the efficiency of the fan. A deflector fixing plate 21 and a support fixing plate 22 are respectively provided at both ends of the deflector body in the length direction, so as to facilitate the fixing of the deflector body. The support portion 12 is installed facing the air outlet 112. The deflector fixing plate 21 and the support fixing plate 22 are both provided with fixing holes, and they are fixed by rivets. One side of the guide plate body between the guide fixing plate 21 and the support fixing plate 22 is arc-shaped, and the other side is broken line-shaped; the arc shape is consistent with the air inlet sealing plate, and the broken line shape is consistent with the outer sealing plate of the impeller, thereby reducing the possibility of air passing through the guide plate body entering the volute 110, and further improving the air outlet efficiency of the fan.

[0055] In this embodiment, a side fixing plate 24 is further provided on one arc-shaped side of the deflector body, and a fixing hole for easy fixing is provided on the side fixing plate 24. The deflector body is further fixed so that the deflector body and the air inlet sealing plate fit more closely.

[0056] In this embodiment, a notch 31 is provided at one end of the side fixing plate 24 where it is connected to the guide plate body; a notch 31 is provided at one end of the guide fixing plate 21 and the support fixing plate 22 where they are connected to the guide plate body. The notch 31 can facilitate the bending of the guide fixing plate 21, the support fixing plate 22 and the side fixing plate 24 without tearing during bending.

[0057] In this embodiment, reinforcing ribs are provided between the side fixing plate 24 and the guide plate body, and at the connection between the guide fixing plate 21 and the support fixing plate 22 and the guide plate body; the reinforcing ribs fix the angle formed between the side fixing plate 24 and the guide plate body, the angle formed between the guide fixing plate 21 and the guide plate body, and the angle formed between the support fixing plate 22 and the guide plate body to prevent deformation; the reinforcing ribs are implemented by pressing.

[0058] In this embodiment, in order to enhance the strength of the guide plate body, the guide plate body is provided with a rib 32, and the direction of the rib 32 is arranged along the direction of airflow movement. The guide plate in this embodiment is integrally formed and has high strength.

[0059] In this embodiment, the two ends of the bottom of the air outlet 112 are respectively provided with a first plate 161 and a second plate 162, one end of the first plate 161 is connected to the side wall of the volute 110, one end of the second plate 162 is connected to the other side wall of the volute 110, a trapezoidal air outlet area 163 with a large upper end and a small lower end is provided between the first plate 161 and the second plate 162, the top surface of the first plate 161 is an inclined surface inclined toward the air outlet area 163, and the top surface of the second plate 162 is an inclined surface inclined toward the air outlet area 163. This arrangement is conducive to reducing noise on the one hand, and will not affect the air output on the other hand.

[0060] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A fan, comprising a volute and an impeller arranged in the volute, characterized in that: The volute comprises two oppositely arranged air inlets, namely a first air inlet and a second air inlet, the volute also comprises an air outlet, the impeller comprises a wheel frame, the two axial ends of the wheel frame are respectively a first connecting portion and a second connecting portion, a partition portion is located between the first connecting portion and the second connecting portion on the wheel frame, a first installation cavity is formed between the first connecting portion and the partition portion, a second installation cavity is formed between the second connecting portion and the partition portion, a plurality of blades are circumferentially arranged in the first installation cavity, and a plurality of blades are circumferentially arranged in the second installation cavity; The blade in the first installation cavity includes a base portion and a bent portion, the base portion and the bent portion form a certain angle, the base portion is inclined toward the inside of the first installation cavity, the bent portion extends toward the inside of the first installation cavity, the large end of the base portion is connected to the partition portion, the small end of the base portion is connected to the first connecting portion, the large end of the bent portion is connected to the partition portion, and the small end of the bent portion is connected to the first connecting portion; The blade in the second installation cavity includes a base portion and a bent portion, the base portion and the bent portion form a certain angle, the base portion is inclined toward the inside of the second installation cavity, the bent portion extends toward the inside of the second installation cavity, the large end of the base portion is connected to the partition portion, the small end of the base portion is connected to the second connecting portion, the large end of the bent portion is connected to the partition portion, and the small end of the bent portion is connected to the second connecting portion; The blades of the first installation cavity and the blades of the second installation cavity are staggered; The fan further includes a first air collector and a second air collector disposed inside the volute, wherein the first air collector is installed at a first air inlet of the volute, and the first air collector is connected to the first connecting portion, and the second air collector is installed at a second air inlet of the volute, and the second air collector is connected to the second connecting portion; A first guide plate is provided between the first air collector and the first connecting portion, and a distance between one end of the first guide plate close to the inclined side wall of the first connecting portion and the inclined side wall of the first connecting portion is 1 cm-2 cm; a second guide plate is provided between the second air collector and the second connecting portion, and a distance between one end of the second guide plate close to the inclined side wall of the second connecting portion and the inclined side wall of the second connecting portion is 1 cm-2 cm; The guide plate body comprises a guide part and a support part, and a guide fixing plate and a support fixing plate are respectively provided at both ends of the guide plate body in the length direction, so as to facilitate fixing the guide plate body; one side between the guide fixing plate and the support fixing plate of the guide plate body is in an arc shape, and the other side is in a broken line shape; both the guide fixing plate and the support fixing plate are provided with fixing holes; The thickness of the blade in the first installation cavity increases successively from one end of the base away from the bending portion to one end of the bending portion away from the base, and the thickness of the blade in the second installation cavity increases successively from one end of the base away from the bending portion to one end of the bending portion away from the base.

2. The fan according to claim 1, characterized in that: The included angle between the base and the bent portion of the blade in the first installation cavity is 140 degrees to 170 degrees, and the included angle between the base and the bent portion of the blade in the second installation cavity is 140 degrees to 170 degrees.

3. The fan according to claim 1, characterized in that: The blades in the first installation cavity are evenly distributed along the circumference of the first installation cavity, and the blades in the second installation cavity are evenly distributed along the circumference of the first installation cavity.

4. The fan according to claim 1, characterized in that: A side fixing plate is also provided on one arc-shaped side of the guide plate body, a fixing hole is provided on the side fixing plate for easy fixing, a notch is provided at one end of the connection between the side fixing plate and the guide plate body, a rib is provided between the side fixing plate and the guide plate body, a notch is provided at one end of the guide fixing plate and the support fixing plate at the connection with the guide plate body, ribs are provided at the connection between the guide fixing plate and the support fixing plate and the guide plate body, and the guide plate body is provided with a rib.

5. The fan according to claim 1, characterized in that: A first plate body and a second plate body are respectively provided at both ends of the bottom of the air outlet, one end of the first plate body is connected to the side wall of the volute, one end of the second plate body is connected to the other side wall of the volute, a trapezoidal air outlet area with a larger upper end and a smaller lower end is provided between the first plate body and the second plate body, the top surface of the first plate body is an inclined surface inclined toward the air outlet area, and the top surface of the second plate body is an inclined surface inclined toward the air outlet area.

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