A mixed flow fan

Abstract

This utility model discloses a mixed-flow fan, including a housing, a motor assembly, and an impeller. The housing includes a shell, which has a first air inlet and a second air inlet. The side wall of the shell has at least one side air inlet. The motor assembly includes a motor and a mounting shell. The motor is fixed to the housing through the mounting shell. The impeller is mounted on the rotating shaft of the motor. The impeller includes an impeller shell and multiple blades. The impeller shell includes a first part and a second part. The first part is located at the end of the motor near the first air inlet, and the second part is located on the outer periphery of the motor. The blades include a first blade and a second blade. The first blade is located in the first part, and the second blade is located in the second part. The second blade is located inside the side air inlet. This utility model achieves the effect of mixing multiple gases during air delivery by opening a side air inlet on the side of the housing and providing a second blade on the inner side of the side air inlet. The rotation of the impeller can simultaneously draw air in through the second air inlet and the side air inlet.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and more specifically, to a mixed-flow fan. Background Technology

[0002] Mixed-flow fans are ventilation devices that combine the high flow rate of axial fans with the high air pressure of centrifugal fans. Their oblique-flow meridional acceleration design makes them highly efficient, low-noise, and energy-saving in various scenarios. Existing mixed-flow fans all adopt a straight-cylinder structure, which can only achieve unidirectional air intake. After installation, they can only deliver air through a single duct, and cannot mix multiple gases during air delivery. Therefore, a technical solution is needed to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and enable the fan to mix multiple gases during the air delivery process, thus providing a mixed-flow fan.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses a mixed-flow fan, including a housing, a motor assembly, and an impeller. The housing includes a shell, which includes a first air outlet and a second air outlet. The side wall of the shell has at least one side air outlet. The motor assembly includes a motor and a mounting shell. The motor is fixed to the housing through the mounting shell. The impeller is mounted on the rotating shaft of the motor. The impeller includes an impeller shell and multiple blades. The impeller shell includes a first part and a second part. The first part is located at the end of the motor near the first air outlet, and the second part is located on the outer periphery of the motor. The blades include a first blade and a second blade. The first blade is located in the first part, and the second blade is located in the second part. The second blade is located inside the side air outlet.

[0006] Furthermore, the air intake direction of the side vent is tangent to the inner wall arc of the housing.

[0007] Furthermore, the mounting shell includes a cylindrical body and a plate body. The cylindrical body is located inside the housing, and the plate body is fixedly installed at the second air outlet. The motor part is installed inside the cylindrical body. The motor includes a connecting ring, which is fixedly connected to the plate body. The plate body is provided with multiple through holes, which communicate with the interior of the housing.

[0008] Furthermore, the second part is located on the outer periphery of the cylinder, and there is a gap between the second part and the cylinder. The inner wall of the second part is provided with a plurality of third blades, which are arranged in a ring. The outer wall of the cylinder is provided with a plurality of heat dissipation plates, which are arranged in a ring.

[0009] Furthermore, the third blade is inclined, the heat sink is inclined, and the inclination directions of the third blade and the heat sink are intersecting.

[0010] Furthermore, the side wall of the cylinder is provided with a plurality of heat dissipation holes, each of which is located between two adjacent heat dissipation plates.

[0011] Furthermore, the first blade and the second blade are integrally formed, and the fan blade extends axially along the outer wall of the impeller housing.

[0012] Furthermore, it includes a flow guide shroud, which is installed at the first air outlet. The outer edge of the first blade is arc-shaped. The flow guide shroud includes an expanding portion and a constricting portion. The expanding portion is located on the outer periphery of the first blade, and the inner diameter of the expanding portion gradually increases in the direction toward the first blade. The constricting portion is located on the side of the impeller away from the motor, and the inner diameter of the constricting portion is smaller than the minimum diameter of the expanding portion.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model has a side air inlet on the side of the shell, and the impeller has a second blade on the inner side of the side air inlet. The rotation of the impeller can simultaneously draw air in from the second air inlet and the side air inlet, so as to achieve the effect of mixing multiple gases when supplying air.

[0015] 2. This utility model utilizes the heat dissipation plate provided on the outer side of the cylinder and the third blade plate on the inner side of the second part of the impeller to generate airflow between the impeller and the cylinder when the impeller rotates, thereby helping to dissipate heat from the motor inside the cylinder. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of this embodiment.

[0017] Figure 2 This is a three-dimensional schematic diagram of another direction of this embodiment.

[0018] Figure 3 This is a cross-sectional view of this embodiment.

[0019] Reference numerals: 1. Outer shell; 11. Housing; 111. First air outlet; 112. Second air outlet; 12. Side air outlet; 2. Motor assembly; 21. Motor; 211. Rotating shaft; 2111. Limiting groove; 212. Connecting ring; 22. Mounting shell; 221. Cylinder; 2211. Heat dissipation plate; 2212. Heat dissipation hole; 222. Plate; 2221. Through hole; 3. Impeller; 31. Impeller shell; 311. First part; 312. Second part; 313. Limiting plate; 32. Fan blade; 321. First blade; 322. Second blade; 33. Third blade; 4. Flow guide; 41. Expansion part; 42. Closing part. Detailed Implementation

[0020] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] like Figures 1-3 As shown, this embodiment discloses a mixed-flow fan, including a housing 1, a motor assembly 2, an impeller 3, and a guide shroud 4. The housing 1 includes a shell 11, which is cylindrical. The shell 11 includes a first air inlet 111 and a second air inlet 112, which are openings at both ends of the shell 11, respectively. The first air inlet 111 is an air outlet, and the second air inlet 112 is an air inlet. The side wall of the shell 11 has at least one side air inlet 12, and the number of side air inlets 12 can be two, three, or even more, depending on the needs. The amount of mixed gas is set. The mesh plate installed in the side air vent 12 can be used to filter large impurities and reduce dust entry. The side air vent 12 can be used to connect to external air or connect to pipelines. The air inlet direction of the side air vent 12 is tangent to the inner wall arc of the housing 11. Since the internal impeller 3 rotates around the central axis 211, the rotation of the impeller 3 can form a spiral airflow at the inner end of the side air vent 12. The tangent of the direction of the side air vent 12 to the inner wall arc of the housing 11 can better enable the impeller 3 to form a negative pressure attraction at the side air vent 12.

[0022] The motor assembly 2 includes a motor 21 and a mounting housing 22. The motor 21 is fixed to the housing 11 via the mounting housing 22. The mounting housing 22 includes a cylindrical body 221 and a plate 222, which are integrally formed. The cylindrical body 221 is located inside the housing 11 and opens towards the second air outlet 112. The motor 21 is installed into the cylindrical body 221 through the open end. The rotating shaft 211 of the motor 21 passes through the inner end face of the cylindrical body 221. The inner end of the cylindrical body 221 is provided with a support plate that can support the motor 21. The plate 222 is fixedly installed on the second air outlet 112. The motor 21 is partially installed inside the cylinder 221, and the other part of the motor 21 is located outside the cylinder 221. The power cord of the motor 21 is connected here and can be pulled outward, which can provide a certain heat dissipation effect for the motor 21. The motor 21 includes a connecting ring 212, which is fixedly connected to the plate 222. The plate 222 has multiple through holes 2221, which are located on the outer periphery of the connecting ring 212 and connect to the inside of the housing 11. A connecting strip is formed between two adjacent through holes 2221. The through holes 2221 are the air inlets of the second air outlet 112.

[0023] Impeller 3 is mounted on the rotating shaft 211 of motor 21. The end of rotating shaft 211 is provided with a limiting groove 2111. Impeller 3 is inserted into rotating shaft 211. The part of impeller 3 inserted into rotating shaft 211 is provided with limiting plate 313. Limiting plate 313 and limiting groove 2111 are correspondingly inserted to limit the rotation direction of impeller 3 and rotating shaft 211, and are locked by bolts. Impeller 3 includes impeller housing 31 and multiple blades 32. Impeller housing 31 includes a first part 311 and a second part 312. The first part 311 is located at the end of motor 21 near the first air outlet 111. The second part 312 is cylindrical and located on the outer periphery of the motor 21. The fan blade 32 includes a first blade 321 and a second blade 322. The first blade 321 is located in the first part 311, and the second blade 322 is located in the second part 312. The second blade 322 is located inside the side air outlet 12. The first blade 321 drives the airflow out, and the second blade 322 drives the airflow in. The rotation of the second blade 322 can generate negative pressure from the through hole 2221 and the side air outlet 12 to draw in air. The rotation of the first blade 321 can cause the airflow to spiral out, increasing the wind speed.

[0024] The first blade 321 and the second blade 322 are integrally formed. The fan blade 32 extends axially along the outer wall of the impeller housing 31, making the fan blade 32 more integrated. When the impeller 3 rotates, the airflow between the first part 311 and the second part 312 is more smoothly connected, which can generate spiral airflow at the first air outlet 111, resulting in faster airflow speed and greater airflow volume.

[0025] The air guide shroud 4 is installed at the first air outlet 111. The outer edge of the first blade 321 is arc-shaped. The air guide shroud 4 includes an expansion portion 41 and a contraction portion 42. The expansion portion 41 is located on the outer periphery of the first blade 321. The inner diameter of the expansion portion 41 gradually increases in the direction towards the first blade 321, that is, the inner diameter of the expansion portion 41 gradually decreases in the direction towards the contraction portion 42. The contraction portion 42 is located on the side of the impeller 3 away from the motor 21. The inner diameter of the contraction portion 42 is smaller than the minimum diameter of the expansion portion 41. The arc-shaped inner wall can gradually reduce the size of the air outlet of the impeller 3, further pressurizing the spiral airflow and increasing the wind speed.

[0026] The second part 312 is located on the outer periphery of the cylinder 221, and there is a gap between the second part 312 and the cylinder 221. The inner wall of the second part 312 is provided with multiple third blades 33, which are arranged in a ring. The outer wall of the cylinder 221 is provided with multiple heat dissipation plates 2211, which are also arranged in a ring. When the impeller 3 rotates, the third blades 33 and the heat dissipation plates 2211 can rotate relative to each other, shearing the air in the gap between the cylinder 221 and the second part 312, causing the air in the gap to flow. The side wall of the cylinder 221 is provided with multiple heat dissipation holes 2212, each heat dissipation hole 2212 is located between two adjacent heat dissipation plates 2211, so that the heat dissipation holes 2212 and the heat dissipation plates 2211 can better dissipate heat from the motor 21, preventing poor heat dissipation of the motor 21 due to the presence of the impeller 3 on the outer periphery of the motor 21.

[0027] The third blade 33 is inclined, and the heat dissipation plate 2211 is inclined. The inclination directions of the third blade 33 and the heat dissipation plate 2211 are intersecting. The inclination direction of the third blade 33 is opposite to that of the fan blade 32. When the fan blade 32 rotates, it can pull the air in the gap between the second part 312 and the cylinder 221 outward. The external airflow enters through the gap between the two heat dissipation plates 2211 and is sent out through the gap between the two third blades 33, which can provide a good heat dissipation effect for the motor 21.

[0028] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A mixed-flow fan, characterized in that, The assembly includes a housing (1), a motor assembly (2), and an impeller (3). The housing (1) includes a shell (11) with a first air inlet (111) and a second air inlet (112). The side wall of the shell (11) has at least one side air inlet (12). The motor assembly (2) includes a motor (21) and a mounting shell (22). The motor (21) is fixed to the shell (11) via the mounting shell (22). The impeller (3) is mounted on the rotating shaft (211) of the motor (21). The impeller (3) includes an impeller shell (31) and multiple blades (3). 2) The impeller housing (31) includes a first part (311) and a second part (312). The first part (311) is located at one end of the motor (21) near the first air outlet (111). The second part (312) is located on the outer periphery of part of the motor (21). The fan blade (32) includes a first blade (321) and a second blade (322). The first blade (321) is located in the first part (311). The second blade (322) is located in the second part (312). The second blade (322) is located on the inner side of the side air outlet (12).

2. The mixed-flow fan according to claim 1, characterized in that, The air intake direction of the side air inlet (12) is tangent to the inner wall arc of the housing (11).

3. A mixed-flow fan according to claim 1, characterized in that, The mounting shell (22) includes a cylindrical body (221) and a plate (222). The cylindrical body (221) is located inside the housing (11). The plate (222) is fixedly installed at the second air outlet (112). The motor (21) is partially installed inside the cylindrical body (221). The motor (21) includes a connecting ring (212). The connecting ring (212) is fixedly connected to the plate (222). The plate (222) is provided with a plurality of through holes (2221). The through holes (2221) communicate with the interior of the housing (11).

4. A mixed-flow fan according to claim 3, characterized in that, The second part (312) is located on the outer periphery of the cylinder (221). There is a gap between the second part (312) and the cylinder (221). The inner wall of the second part (312) is provided with a plurality of third blades (33), which are arranged in a ring. The outer wall of the cylinder (221) is provided with a plurality of heat dissipation plates (2211), which are arranged in a ring.

5. A mixed-flow fan according to claim 4, characterized in that, The third blade (33) is inclined, the heat sink (2211) is inclined, and the inclination directions of the third blade (33) and the heat sink (2211) are intersecting.

6. A mixed-flow fan according to claim 4, characterized in that, The side wall of the cylinder (221) is provided with a plurality of heat dissipation holes (2212), each of the heat dissipation holes (2212) being located between two adjacent heat dissipation plates (2211).

7. A mixed-flow fan according to claim 1, characterized in that, The first blade (321) and the second blade (322) are integrally formed, and the fan blade (32) extends obliquely along the outer wall of the impeller housing (31).

8. A mixed-flow fan according to claim 1, characterized in that, Includes a flow guide (4), which is installed on the first air outlet (111). The outer edge of the first blade (321) is arc-shaped. The flow guide (4) includes an expansion portion (41) and a contraction portion (42). The expansion portion (41) is located on the outer periphery of the first blade (321). The inner diameter of the expansion portion (41) gradually increases in the direction toward the first blade (321). The contraction portion (42) is located on the side of the impeller (3) away from the motor (21). The inner diameter of the contraction portion (42) is smaller than the minimum diameter of the expansion portion (41).

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