A hyperbolic extrusion-type guide fluid mechanics air outlet structure

Abstract

The present invention discloses a hyperbolic extrusion-type guide fluid mechanics air outlet structure, comprising a wind shell with a preset air outlet trajectory, an air inlet provided on the wind shell, a wind wheel arranged at the air inlet, an air outlet section provided on the wind shell, the air outlet section being located at the end of the air outlet trajectory of the wind shell, the air outlet section being provided with a closing part and an expansion part in sequence with respect to the air outlet direction, the end of the expansion part forming an air outlet port to optimize the air outlet effect.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to an air outlet structure of a hyperbolic extrusion-type guide fluid mechanics. Background Art

[0002] The air outlet devices currently on the market, especially volute fans or volute centrifugal fans, use motors to drive the impeller to rotate. The blades in the impeller force the gas to rotate, doing work on the gas to increase its energy. Under the action of the fan, the gas is thrown around the impeller and the velocity energy is converted into pressure energy through the volute. When the gas in the impeller is discharged, the pressure in the impeller is lower than the pressure in the air inlet. New gas is sucked into the impeller under the action of the pressure difference, and the gas is continuously output from the outlet.

[0003] The defect of the volute fan on the market is that since the air outlet is designed to be straight, and the wind speed at the air outlet is directional and uneven, especially when the static pressure is not yet fully recovered, if the air outlet position is located at the turning point of the air duct, it will cause a large energy loss, further leading to uneven air outlet effect. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a hyperbolic extrusion-type guide fluid mechanics air outlet structure to optimize the air outlet effect.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions: a hyperbolic extrusion-type guide fluid mechanics air outlet structure, comprising a wind shell with a preset air outlet trajectory, an air inlet being provided on the wind shell, a wind wheel being arranged at the air inlet, and an air outlet section being provided on the wind shell, the air outlet section being located at the end of the air outlet trajectory of the wind shell, the air outlet section being provided with a closing part and an expansion part in sequence with respect to the air outlet direction, and the end of the expansion part forming an air outlet port.

[0006] Furthermore, the wind casing may be a volute, and the air outlet trajectory may be spiral.

[0007] Furthermore, the cross-sectional area of the closing portion decreases with respect to the air outlet direction, and the cross-sectional area of the expanding portion increases with respect to the air outlet direction.

[0008] Furthermore, the cross-sections of the closing portion and the expanding portion are both arc-shaped.

[0009] Furthermore, the closing portion and the expansion portion are smoothly connected.

[0010] Furthermore, the boundary of the air outlet port is arranged to be straight.

[0011] Furthermore, the cross section of the air outlet section is formed by a first guide curve and a second guide curve that are arranged opposite to each other, and / or the lines of the first guide curve and the second guide curve are in a mirror image relationship.

[0012] Furthermore, the first guide curve and the second guide curve are arranged parallel and staggered with respect to the air outlet direction, and the maximum staggered spacing L1 is 72 mm.

[0013] Furthermore, the vertical distance H1 of the smallest opening of the closing portion is 249 mm, and the vertical distance H2 between the smallest opening and the largest opening of the closing portion is 80 mm.

[0014] Furthermore, the maximum opening cross-section of the closing portion is larger than the air outlet end face to ensure the acceleration effect on the air flow in the air outlet section, and the air outlet length of the closing portion is larger than the air outlet length of the expansion portion.

[0015] Furthermore, the closing portion includes a first closing curved section and a second closing curved section arranged along the air outlet direction, and the air outlet portion includes a first expanding curved section and a second expanding curved section arranged along the air outlet direction;

[0016] The first closing curve section corresponds to the extreme cross-sectional area of the second expanding curve section, the second closing curve section corresponds to the extreme cross-sectional area of the first expanding curve section, the closing trend of the first closing curve section is smaller than the expanding trend of the second expanding curve section, and the closing trend of the second closing curve section is larger than the expanding trend of the first expanding curve section.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. A closing portion and an expansion portion are provided at the end of the wind shell, the closing portion and the expansion portion forming an air outlet channel, and the cross-sections of the closing portion and the expansion portion are both arranged in an arc shape, thereby guiding the airflow and improving the smoothness of the air outlet;

[0018] 2. During the air discharge process, the wind wheel rotates to form an air flow, which passes through the pre-set air discharge trajectory of the wind shell and reaches the closing part, so that the air flow is subjected to squeezing force to increase the air flow speed. After being guided by the expansion part, the air flow is able to obtain a larger air discharge area at the air outlet, realizing uniform air discharge;

[0019] 3. This type of air outlet section structure has high applicability and can be installed on the air outlet structure currently on the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view schematic diagram of the present invention;

[0021] Figure 2 This is an arrangement of the first guide curve and the second guide curve of the present invention;

[0022] Figure 3Another arrangement of the first guide curve and the second guide curve of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the closing part and the expansion part of the present invention;

[0024] In the figure: 1. Wind housing; 2. Air inlet; 3. Wind wheel; 4. Closing portion; 4.1. First closing curve; 4.2. Second closing curve; 5. Expansion portion; 5.1. First expansion curve; 5.2. Second expansion curve; 6. Air outlet; 7. First guide curve; 8. Second guide curve. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] It should be understood that although terms such as upper, middle, lower, top, end, etc. appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for ease of understanding, and are not used to define any direction or order limitation.

[0027] like Figure 1-3 As shown, a hyperbolic extrusion-type guide fluid mechanics volute structure includes a wind shell 1 with a preset air outlet trajectory, an air inlet 2 is provided on the wind shell 1, a wind wheel 3 is arranged at the air inlet 2, and the wind wheel 3 is driven to rotate by a fan, and an air outlet section is also provided on the wind shell 1, and the air outlet section is located at the end of the air outlet trajectory of the wind shell 1. The air outlet section is provided with a closing part 4 and an expansion part 5 in sequence with respect to the air outlet direction, the closing part 4 and the expansion part 5 form an air outlet channel, and the end of the expansion part 5 forms an air outlet port 6.

[0028] As a further explanation of the closing portion 4 and the expansion portion 5 , the cross-sectional area of the closing portion 4 decreases with respect to the air outlet direction, and the cross-sectional area of the expansion portion 5 increases with respect to the air outlet direction.

[0029] During the air outlet process, the wind flow is formed by the rotation of the wind wheel 3, and reaches the closing part 4 through the pre-set air outlet trajectory of the wind shell 1, so that the air flow is subjected to extrusion pressure to increase the wind speed. After being guided by the expansion part 5, the air flow is able to obtain a larger air outlet area at the air outlet port 6, thereby realizing uniform discharge of the air flow.

[0030] As a further explanation of the wind outlet effect, when the wind flow is guided and output in the wind shell 1, it receives extrusion pressure through the closing part 4, and at the point where the cross-sectional area of the closing part 4 is the smallest, the dynamic pressure reaches the maximum value and the static pressure reaches the minimum value. The wind flow speed increases due to the reduction in the cross-sectional area of the flow, thereby achieving an increase in the wind flow speed. The increase in wind speed causes a smaller pressure to be formed at the closing part 4, thereby generating a pressure difference. The pressure difference forms an external suction force at the air outlet section, thereby achieving an increase in the air volume.

[0031] In addition, the entire airflow needs to go through the contraction process at the closing part 4 and the expansion process at the expansion part 5 at the same time, so as to stabilize the direction of the airflow, achieve the rectification effect, avoid the energy loss caused by the vortex generated by the turning of the air duct, and improve the uniformity of the air output.

[0032] It should be pointed out that the selection of the above-mentioned air outlet section effectively increases the flow rate of the airflow. This type of air outlet section structure has high applicability and can be installed on wind casings or volute air outlet structures of other specifications as needed.

[0033] In this embodiment, the cross-sections of the closing portion 4 and the expanding portion 5 are both arranged in an arc shape, thereby guiding the airflow and improving the smoothness of the air outlet.

[0034] Specifically, the air outlet section is arranged in a curved surface.

[0035] Specifically, the closing portion 4 is smoothly connected to the expansion portion 5 to further enhance the guiding effect on the wind flow.

[0036] As a further optimization of the air outlet effect, the boundary of the air outlet port 6 is set to be straight, the boundary is formed at the maximum cross-sectional area of the expansion part 5, and the boundary is set to be shorter to ensure the uniformity of the airflow output at the air outlet port 6.

[0037] In this embodiment, the cross section of the air outlet section is provided with a first guide curve 7 and a second guide curve 8 which are arranged opposite to each other. Optionally, the first guide curve 7 is arranged close to the center of the wind wheel 3 , and the second guide curve 8 is relatively far away from the center of the wind wheel 3 .

[0038] In other embodiments, the line types of the first guide curve 7 and the second guide curve 8 are in a mirror-image relationship. It should be pointed out that this embodiment only limits the line types of the first guide curve 7 and the second guide curve 8, and does not limit the relative positional relationship between the first guide curve 7 and the second guide curve 8.

[0039] In other embodiments, the first guide curve 7 and the second guide curve 8 are arranged in parallel and staggered with respect to the air outlet direction, wherein the first guide curve 7 and the second guide curve 8 maintain a linear mirror-symmetrical relationship, and the staggered spacing L1 is maximum 72 mm. Through the above improvements, the adaptability to different air outlet requirements is improved.

[0040] As an option, Figure 3 In the arrangement of the first guide curve and the second guide curve shown, the air outlet end surface can be arranged parallel to the line connecting the smallest end of the closing part, or the air outlet end surface can be arranged parallel to the line connecting the smallest end of the closing part. Figure 3 The center lines are vertical and connected by straight boundaries.

[0041] Preferably, the first guide curve 7 and the second guide curve 8 both have a first arc segment and a second arc segment. With respect to the air outlet direction, the first arc segment constitutes the rear section of the closing part 4 and the complete expansion part 5. The first arc segment has a rounded angle R of 93 mm, the horizontal distance L2 of the first arc segment is 152 mm, and the arc angle a of the first arc segment is 115°. The second arc segment constitutes a relative expansion section on the wind shell 1, as well as the front end of the closing part 4.

[0042] The vertical distance H1 of the smallest opening of the closing portion 4 is 249 mm, and the vertical distance H2 between the smallest opening and the largest opening of the closing portion 4 is 80 mm.

[0043] like Figure 4 As shown, in other embodiments, the closing portion 4 includes a first closing curved section 4.1 and a second closing curved section 4.2 arranged along the air outlet direction, and the air outlet portion includes a first expanding curved section 5.1 and a second expanding curved section 5.2 arranged along the air outlet direction;

[0044] The first closing curve section 4.1 corresponds to the limit cross-sectional area of the second expanding curve section 5.2, and the second closing curve section 4.2 corresponds to the limit cross-sectional area of the first expanding curve section 5.1. The closing trend of the first closing curve section 4.1 is smaller than the expansion trend of the second expanding curve section 5.2, and the closing trend of the second closing curve section 4.2 is greater than the expansion trend of the first expanding curve section 5.1.

[0045] Optionally, the closing portion 4 is connected to the maximum opening of the wind shell 1 to ensure the wind flow output ratio.

[0046] Furthermore, the maximum opening cross-section of the closing portion 4 is larger than the air outlet end face to ensure the acceleration effect on the airflow in the air outlet section, and the air outlet length of the closing portion 4 is larger than the air outlet length of the expansion portion 5.

[0047] In the above embodiment, the wind casing may be a volute, and the air outlet trajectory may be spiral.

[0048] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A hyperbolic extrusion-type guide fluid mechanics air outlet structure, used in a volute-type fan, comprising a wind housing (1) with a preset air outlet trajectory, an air inlet (2) provided on the wind housing (1), and a wind wheel (3) arranged at the air inlet (2), characterized in that: The wind housing (1) is further provided with an air outlet section, the air outlet section being located at the end of the air outlet trajectory of the wind housing (1), the air outlet section being provided with a closing portion (4) and an expansion portion (5) in sequence along the air outlet direction, the end of the expansion portion (5) forming an air outlet port (6); The cross-sectional area of the closing portion (4) decreases along the air outlet direction, and the cross-sectional area of the expanding portion (5) increases along the air outlet direction; The closing portion (4) comprises a first closing curved section (4.1) and a second closing curved section (4.2) arranged along the air outlet direction, and the expansion portion comprises a first expansion curved section (5.1) and a second expansion curved section (5.2) arranged along the air outlet direction; the first closing curved section (4.1) and the second expansion curved section (5.2) have correspondingly equal maximum cross-sectional areas, the second closing curved section (4.2) and the first expansion curved section (5.1) have correspondingly equal maximum cross-sectional areas, the first closing curved section (4.1) has a closing tendency smaller than the expansion tendency of the second expansion curved section (5.2), and the second closing curved section (4.2) has a closing tendency larger than the expansion tendency of the first expansion curved section (5.1).

2. The hyperbolic extrusion-type guide fluid mechanics air outlet structure according to claim 1, characterized in that: The closing portion (4) and the expansion portion (5) are smoothly connected.

3. The hyperbolic extrusion-type guide fluid mechanics air outlet structure according to claim 1, characterized in that: The closing portion (4) and the expanding portion (5) are both arranged in an arc shape.

4. The hyperbolic extrusion-type guide fluid mechanics air outlet structure according to claim 1, characterized in that: The boundary of the air outlet port (6) is arranged to be straight.

5. The hyperbolic extrusion-type guide fluid mechanics air outlet structure according to claim 1, characterized in that: The cross section of the air outlet section is formed by a first guide curve (7) and a second guide curve (8) which are arranged opposite to each other, and the lines of the first guide curve (7) and the second guide curve (8) are in a mirror image relationship.

6. The hyperbolic extrusion-type guide fluid mechanics air outlet structure according to claim 5, characterized in that: The first guide curve (7) and the second guide curve (8) are arranged parallel and staggered along the air outlet direction, and the staggered spacing L1 is a maximum of 72 mm.

7. The hyperbolic extrusion-type guide fluid mechanics air outlet structure according to claim 1, characterized in that: The vertical distance H1 of the smallest opening of the closing portion (4) is 249 mm, and the vertical distance H2 between the smallest opening and the largest opening of the closing portion (4) is 80 mm.

8. The hyperbolic extrusion-type guide fluid mechanics air outlet structure according to claim 1, characterized in that: The maximum opening cross-sectional area of the closing portion (4) is greater than the cross-sectional area of the air outlet port, and the air outlet length of the closing portion (4) is greater than the air outlet length of the expansion portion (5).

Images