TWM629128U - blower - Google Patents

Abstract

The casing of the new blower is composed of an upper casing and a lower casing, and an air flow space and a connected air outlet channel are arranged inside the fan. The drive shaft penetrates through the lower casing to be connected and fixed to the fan, the upper casing has an air inlet corresponding to the air inlet hole on the top surface of the fan, and the upper casing is formed with an arc-shaped first rib on the periphery of the air inlet. A second rib ring is formed on the inner bottom surface of the upper casing and adjacent to the air inlet. When the external fluid flows in through the air inlet, the fluid can smoothly pass along the arc surface of the first rib ring, and the fluid is transported to the airflow space by the fan. Part of the fluid will be blocked by the second rib ring to form a vertical downward flow of air curtains, which can significantly reduce noise generation and improve the mute effect.

Description

blower

The new model is air supply equipment, especially a blower with noise reduction effect.

The blower is an air supply device that uses the generated pressure difference to make the fluid flow. As shown in FIG. 6, the blower used in the prior art generally has a casing 50, which is composed of an upper cover 51 and a lower cover 52. An inner space 53 is formed inside 50, the casing 50 is cylindrical, an air inlet 54 is formed in the center of the upper cover 51 and communicates with the inner space 53, and an air outlet 55 is formed on the circumferential side of the casing 50, and one end of the air outlet 55 is formed. It communicates with the inner space 53 of the casing 50 , a motor 56 is installed at the lower cover 52 of the casing 50 , the drive shaft 561 of the motor 56 can output power and protrudes into the inner space 53 of the casing, and a fan is installed inside the casing 50 57. The rotation center of the fan 57 is fixedly connected to the drive shaft 561 and is positioned relative to the air inlet 54 of the upper cover 51. When the fan 57 rotates, the external fluid passes through the air inlet 54, enters the interior through the upper center of the fan 57, and is pressurized and pushed by the fan 57. After being squeezed, it flows out from the circumferential surface, and then is output from the air outlet pipe 55 .

Since the upper cover 51 of the blower casing is formed of a plate with approximately the same thickness, or is made by other metalworking techniques in the prior art, the upper and lower surfaces of the upper cover 51 adjacent to the air inlet 54 are flat. 54 is formed through the upper cover 51. When the external fluid enters through the air inlet 54 quickly, most of the fluid enters the interior through the upper center of the fan 57 and flows out after being pressurized and pushed, and the other part of the fluid passes through the upper cover 51 of the casing and the fan 57. The gaps between the top surfaces, when the fluid passes through the air inlet 54 quickly, will create problems and disadvantages with annoying noise.

In view of the problems and shortcomings of the above-mentioned prior art, the author has redesigned and improved it. A first rib ring and a second rib ring are respectively formed on the periphery of the air inlet and the inner bottom surface of the upper casing, so that the fluid flows through the air inlet. The purpose is to reduce noise generation and have better mute effect.

In order to achieve the above-mentioned creative purpose, the technical means used in the present invention is to provide a blower, which includes an upper casing, a lower casing, a fan and a motor; the upper casing and the lower casing are connected to form a The casing is a hollow cylinder with an air flow space formed inside and an air outlet channel communicated with the air flow space, an air inlet is formed through the center of the upper casing, and an air inlet is formed in the center of the upper casing. A first rib is formed on the periphery of the tuyere; the fan is located between the upper casing and the lower casing, an air inlet hole is formed above the fan and a plurality of flow passages are formed inside, and the air inlet hole corresponds to the upper casing. At the position of the air inlet of the casing, one end of each flow channel is connected to the air inlet hole, and the other end is connected to the air flow space of the casing; the motor is arranged outside the lower casing and has a drive shaft, the drive shaft One end penetrates through the lower casing and protrudes into the airflow space to be combined and fixed with the fan.

In the blower, a second rib ring is further formed on the inner bottom surface of the upper casing and adjacent to the air inlet, and the second rib ring has an outer ring surface and an inner ring surface, and the inner ring surface is opposite to each other. Adjacent to the first rib, the diameter of the first rib is smaller than the diameter of the second rib, the first rib and the second rib are concentrically arranged, the first rib and the second rib An annular concave portion is concavely formed on the inner bottom surface of the upper casing between the rings, and the hole edge of the air inlet hole corresponds to the annular concave portion.

The blower, wherein the cross-sectional shapes of the first rib ring and the second rib ring are arc-shaped.

In the above-mentioned blower, there is an included angle A between the inner bottom surface of the upper casing and the outer annular surface of the second rib ring, and the included angle is preferably 70 degrees to 90 degrees.

The blower, wherein the fan has an upper sheet body and a lower sheet body, a plurality of blades are formed between the upper sheet body and the lower sheet body, the flow channel is formed between two of the blades, and the upper sheet body is formed. An inner rib ring is formed above and on the periphery of the air inlet hole, an outer rib ring is formed on the periphery of the outer ring, and a middle rib ring is formed between the inner rib ring and the outer rib ring, the inner rib ring, the middle rib ring The rib ring and the outer rib ring are arranged in concentric circles.

The upper casing and the lower casing of the new type are combined into a casing and a fan is arranged inside. The rotation center of the fan is connected with the drive shaft of the motor arranged at the bottom of the lower casing. The bottom surface is respectively formed with a first rib ring and a second rib ring, and the cross-sectional shapes of the first rib ring and the second rib ring are arc-shaped, and the outer surfaces of the first rib ring and the second rib ring are arc-shaped Modeling, when the external fluid is driven by the fan and enters the upper and lower casings through the air inlet, it can smoothly pass through and enter the interior through the air inlet of the fan to reduce the generation of wind shear sound, and most of the airflow can be squeezed Output from the air outlet duct, when a small part of the escaping air enters between the top of the fan and the inner side of the upper casing, it will be blocked by the second rib ring and change the flow direction to a vertical escaping air flow from top to bottom. Continue to flow vertically downward and further form an air curtain, whereby the air curtain can prevent the escaping airflow from continuously escaping to the air inlet or the air inlet hole, thus generating the escaping airflow wind shear noise, so it can have better quietness Effect.

10: Upper shell

100: Airflow space

11: air inlet

111: The first rib ring

112: Second rib ring

1121: Outer Torus

113: Ring recess

12: Upper circulation channel

13: Upper air outlet

20: Lower shell

21: base

22: Lower ring channel

23: Lower air outlet

30: Fan

31: Blades

32: Upper body

320: air inlet

321: inner rib ring

322: Middle Rib Ring

323: Outer rib ring

33: Shaft hole

34: Lower body

40: Motor

41: Drive shaft

50: Shell

51: upper cover

52: lower cover

53: Interior Space

54: air inlet

55: Air outlet pipe

56: Motor

561: Drive shaft

57: Fan

A: Included angle

L: fluid

L1: Divide fluid

Figure 1 is a three-dimensional appearance view of the new type.

Figure 2 is a schematic three-dimensional exploded view of the new type.

Figure 3 is a sectional view of the new type.

FIG. 4 is a partially enlarged schematic diagram of the new type.

FIG. 5 is a schematic three-dimensional cross-sectional view of the new type.

FIG. 6 is a schematic diagram of the prior art.

Referring to FIG. 1 and FIG. 2 , the new blower includes an upper casing 10 , a lower casing 20 , a fan 30 and a motor 40 ; the upper casing 10 and the lower casing 20 are abutted against each other. As a casing, the casing is a hollow cylinder with an airflow space 100 formed therein, the fan 30 is arranged between the upper casing 10 and the lower casing 20 , and the motor 40 is arranged in the lower casing 20 Externally, the motor 40 has a drive shaft 41 , one end of the drive shaft 41 penetrates the lower casing 20 and protrudes to the airflow space 100 , and is fixed with the rotation center of the fan 30 .

2 to 5 , an air inlet 11 is formed through the center of the upper casing 10 , and a first rib ring 111 is formed on the periphery of the air inlet 11 on the upper casing 10 . The first rib ring 111 has a shape In an arc shape, a second rib ring 112 is formed protruding from the inner bottom surface of the upper casing 10 and adjacent to the air inlet 11 , and the protruding end of the second rib ring 112 has an arc shape. It has an outer annular surface 1121 and an inner annular surface, the inner annular surface is adjacent to the first rib ring 111 , and an included angle A is formed between the inner bottom surface of the upper casing 10 and the outer annular surface 1121 of the second rib ring 112 . A preferably implemented angle is 70 degrees to 90 degrees. As shown in the specific embodiment shown in FIG. 3 , the cross-sectional shapes of the first rib ring 111 and the second rib ring 112 are arc-shaped; the first rib ring 112 The position of 111 is higher than the position of the second rib 112 to form a progressive height configuration; and the diameter of the first rib 111 is smaller than the diameter of the second rib 112, the first rib 111 and the The second rib rings 112 are arranged concentrically. An annular recess 113 is concavely formed on the inner bottom surface of the upper casing 10 between the first rib 111 and the second rib 112 . In addition, an upper circulation channel 12 is formed inside the upper casing 10 and an upper air outlet channel 13 is formed protruding from the periphery, and the upper circulation channel 12 and the upper air outlet channel 13 communicate with each other.

As shown in one of the specific embodiments shown in the figure, the thickness of the upper casing 10 adjacent to the air inlet 11 gradually decreases toward the air inlet 11 to form the first rib ring 111 .

The center of the lower shell 20 is concave from the bottom to protrude upwardly with a base 21 , a hole is formed through the center of the base 21 , and a lower annular channel 22 is formed inside the lower shell 20 and protrudes from the periphery. A lower air outlet channel 23 is formed. The lower annular channel 22 and the lower air outlet channel 23 are in communication with each other. The air channel 13 forms an air outlet channel and communicates with the airflow space 100 inside the casing.

The motor 40 is arranged and assembled in the base 21 of the lower casing 20 , the drive shaft 41 of the motor 40 is a through hole penetrating the base 21 , the fan 30 is a component of the prior art, and has an upper body 32 and a lower The sheet body 34, a plurality of blades 31 are formed between the upper sheet body 32 and the lower sheet body 34, the blades 31 are spaced apart from each other and arranged in a radial shape, and a fluid (for example: air) is formed between the blades 31. ) through the flow channel, the fan 30 is located in the center of the lower body 34 below and forms a shaft hole 33, the shaft hole 33 and the drive shaft 41 are sleeved and fixed with each other, the fan 30 is located on the upper body 32 above An air inlet hole 320 is formed in the center. The air inlet hole 320 communicates with the inside of the fan 30 and corresponds to the position of the air inlet 11 of the upper casing 10. The upper body 32 of the fan 30 is above the air inlet hole 320. An inner rib ring 321 is formed on the periphery, an outer rib ring 323 is formed on the outer periphery of the upper body 32, and a middle rib ring 322 is formed between the inner rib ring 321 and the outer rib ring 323. The inner rib ring 321, the The middle rib ring 322 and the outer rib ring 323 are arranged in concentric circles.

When the fan 30 rotates, the fluid L (as shown in FIG. 3 and FIG. 4 , the fluid L is indicated by the dotted arrow) enters the inside of the fan 30 from the air inlet 11 and the air inlet hole 320 , and enters the fan 30 through the flow channel between the blades 31 . The airflow space 100 between the upper casing 10 and the lower casing 20 can be output from the air outlet channel.

As shown in FIG. 3 , in the preferred embodiment of the present invention, the position of the hole edge of the air inlet hole 320 corresponds to the position of the annular recess 113 between the first rib 111 and the second rib 112 .

When the new blower is in use, the rotating fan 30 will flow the external fluid L through the air inlet 11 of the casing, and then enter the interior through the air inlet 320 of the fan 30. Since the first rib ring 111 has an arc shape and the aperture size of the air inlet 11 is smaller than that of the air inlet hole 320. Using this difference in aperture size, the fluid L can smoothly pass along the surface of the air inlet 11 and then enter the air inlet hole 320, and the fluid L extends along a plurality of The space between the blades 31 is further discharged along the space between the upper circulation channel 12 and the lower annular channel 22 and the space between the upper air outlet channel 13 and the lower air outlet channel 23 . There is a gap between it and the upper body 32 of the fan 30, and a part of the fluid L flowing in the internal airflow space 100 will escape upward to a partial fluid L1 (as shown in FIG. 3 and FIG. 4, the partial fluid L1 is The solid line arrows indicate), when the air flow of the shunt L1 will flow upward between the upper part of the fan 30 and the upper casing 10 through the outer periphery of the upper body 32 , the air flow of the shunt L1 will be affected by the outer ring surface of the second rib ring 112 After being blocked by 1121, it will change the flow direction and turn into an airflow perpendicular to the escape direction of the sub-fluid L1. The sub-fluid L1 continues to flow vertically downward from top to bottom and gradually forms an air curtain, whereby the air curtain has the ability to prevent the escape. The airflow continues to escape to the air inlet 11 and the air inlet hole 320 to generate wind shear noise of the escaping airflow, thereby enhancing the mute effect.

10: Upper shell

100: Airflow space

11: air inlet

111: The first rib ring

112: Second rib ring

113: Ring recess

12: Upper circulation channel

13: Upper air outlet

20: Lower shell

21: base

22: Lower ring channel

23: Lower air outlet

30: Fan

31: Blades

32: Upper body

320: air inlet

34: Lower body

40: Motor

41: Drive shaft

Claims (6)

A blower includes an upper casing, a lower casing, a fan and a motor; the upper casing and the lower casing are connected to form a casing, the casing is a hollow cylinder, and an airflow space is formed inside it and an air outlet channel that communicates with the airflow space is formed, an air inlet is formed through the center of the upper casing, and a first rib is formed on the periphery of the upper casing; the fan is located on the upper casing Between it and the lower casing, an air inlet hole is formed above the fan and a plurality of flow passages are formed inside, the air inlet hole corresponds to the position of the air inlet of the upper casing, and one end of each flow passage is connected to the air inlet hole. connection, the other end is connected with the airflow space of the casing; the motor is arranged outside the lower casing and has a drive shaft, one end of the drive shaft penetrates the lower casing and protrudes into the airflow space to combine with the fan fixed. The blower according to claim 1, wherein a second rib ring is further formed on the inner bottom surface of the upper casing and adjacent to the air inlet, the second rib ring has an outer ring surface and an inner ring surface, the The inner annular surface is adjacent to the first rib ring, the diameter of the first rib ring is smaller than the diameter of the second rib ring, the first rib ring and the second rib ring are arranged in concentric circles, and the first rib ring and the second rib ring are arranged in concentric circles. An annular concave portion is concavely formed on the inner bottom surface of the upper casing between the second rib rings, and the hole edge of the air inlet hole corresponds to the annular concave portion. The blower according to claim 2, wherein the cross-sectional shapes of the first rib ring and the second rib ring are arc-shaped. The blower according to claim 2, wherein an included angle is formed between the inner bottom surface of the upper casing and the outer annular surface of the second rib ring, and the included angle is preferably 70 degrees to 90 degrees. The blower of claim 3, wherein there is an included angle between the inner bottom surface of the upper casing and the outer annular surface of the second rib ring, and the included angle is preferably 70 degrees to 90 degrees. The blower according to any one of claims 1 to 5, wherein the fan has an upper sheet body and a lower sheet body, a plurality of blades are formed between the upper sheet body and the lower sheet body, and the flow channel is formed in the Between the two blades, an inner rib is formed above the upper body and on the periphery of the air inlet hole, an outer rib is formed on the periphery of the outer ring, and a middle rib is formed between the inner rib and the outer rib The rib ring, the inner rib ring, the middle rib ring and the outer rib ring are arranged in concentric circles.

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