Mounting shell and axial flow fan

Abstract

The utility model belongs to the field of axial flow fan structures, and particularly discloses an installation shell and an axial flow fan, the installation shell comprises an air guide barrel and an air outlet net detachably connected to the air guide barrel, and a plurality of installation blocks are detachably connected to the air outlet net in the circumferential direction of the air outlet net. A mounting groove used for clamping the side face and the bottom of the mounting block is formed in the air guide cylinder, and the mounting block is detachably connected with the side wall of the mounting groove. The axial flow fan comprises an installation shell and an axial flow blade installed in the installation shell. By the adoption of the scheme, the problems that the air duct is columnar, threaded holes are not prone to being drilled in the arc-shaped side face of the air duct, a pulling rivet is usually driven into the side wall of the air duct, the pulling rivet is used as a riveting nut to be connected with a bolt, after long-term use, when the bolt is screwed, the pulling rivet and the bolt are prone to rotating together, and the bolt is not prone to being taken down can be solved.

Description

Technical Field

[0001] This utility model belongs to the field of axial flow fan structure, specifically relating to mounting housing and axial flow fan. Background Technology

[0002] The working principle of an axial flow fan is to make air flow along the fan axis by rotating the blades, thereby achieving functions such as ventilation and cooling. Axial flow fans are widely used in central air conditioning air-cooled chillers, air source heat pump water heaters, and multi-split air conditioning (heat pump) units to achieve the cooling effect of the air conditioning units.

[0003] When using an axial flow fan, such as Figure 1 As shown, the blades are installed inside the air guide duct 2, and an air outlet screen 1 is installed at the air outlet of the air guide duct 2. During long-term use, when the unit needs repair due to damage to the blades or the motor driving the blades, the air outlet screen 1 needs to be removed. Since the air guide duct 2 is cylindrical, it is difficult to drill threaded holes on its curved side. Typically, rivets 3 are driven into the side wall of the air guide duct 2. Then, a limiting ring 5 is set around the air outlet screen 1, and after aligning it with the rivet 3, the rivet 3 is used as a rivet nut and bolt 4 for connection. The bolt 4 passes through the limiting ring 5 and is then screwed into the rivet 3, thus installing the air outlet screen 1 onto the air guide duct 2. However, after long-term use, when tightening the bolt 4, the rivet 3 and bolt 4 may rotate together, making it difficult to remove the bolt 4. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an installation housing and an axial flow fan to solve the problem that the air guide tube is cylindrical and its curved side is difficult to drill threaded holes. Usually, rivets are driven into the side wall of the air guide tube and used as rivet nuts and bolts for connection. After long-term use, when the bolt is tightened, the rivets and bolts are prone to rotate together, making it difficult to remove the bolts.

[0005] According to the embodiments of this utility model, the following technical solution is adopted:

[0006] The mounting housing includes an air duct and an air outlet screen detachably connected to the air duct. Several mounting blocks are detachably connected to the air outlet screen along its circumference. The air duct has mounting grooves for locking the sides and bottom of the mounting blocks. The mounting blocks and the side walls of the mounting grooves are detachably connected.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] In this solution, the installation block and the installation groove work together to position the air outlet screen when assembling the air outlet screen and the air duct. The installation block is inserted into the installation groove to position the air outlet screen in both the circumferential and vertical directions.

[0009] The mounting block has a large contact area and multiple contact surfaces with the mounting slot, making it easy to drive bolts in according to various actual needs. Alternatively, the mounting block can be connected to the mounting slot through other detachable connection methods. Even if the mounting block wears out after prolonged use, or if the threaded holes on the mounting block are damaged due to frequent bolt driving, the mounting block can be replaced.

[0010] Furthermore, the air outlet net includes a net cover and several main ribs fixed along the circumference of the net cover, and the mounting block is provided with positioning grooves for engaging with the ends of the main ribs.

[0011] Furthermore, the end of the main rib is provided with a bent part, and the bent part is connected to a limiting member. The axis of the limiting member is perpendicular to the axis of the main rib. The positioning groove is opened vertically, the bent part is stuck in the positioning groove, the width of the limiting member is greater than the width of the positioning groove, and the limiting member is stuck between the bottom of the positioning groove and the bottom of the installation groove.

[0012] Furthermore, the limiting component is annular, and the mounting block is provided with a positioning part for positioning the limiting component.

[0013] Furthermore, the mounting block has threaded holes on both sides of the positioning groove, and the side wall of the mounting groove has through holes for communicating with the threaded holes. It also includes bolts for passing through the through holes and connecting with the threaded holes.

[0014] Furthermore, the through hole is a strip-shaped hole, the width of which is equal to the inner diameter of the threaded hole, and the projections of all threaded holes toward the strip-shaped hole are all within the strip-shaped hole.

[0015] Furthermore, the side of the mounting groove is a straight wall, and the side of the mounting block is in contact with the straight wall of the mounting groove.

[0016] According to embodiments of this utility model, the following technical solutions are also adopted:

[0017] An axial flow fan includes a mounting housing and axial flow blades mounted inside the mounting housing.

[0018] Furthermore, an installation plate is provided at the end of the air duct facing away from the air outlet, and a drive component for driving the axial flow blades to rotate is also installed on the installation plate.

[0019] Furthermore, the drive unit includes a motor and a mounting bracket for mounting the motor, the mounting bracket and the mounting plate being detachably connected. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the axial flow fan in the background art of this utility model.

[0021] Figure 2 This is a schematic diagram of the overall structure of the axial flow fan in the embodiment of this utility model.

[0022] Figure 3This is a schematic diagram of the air outlet mesh in an embodiment of this utility model.

[0023] Figure 4 This is a schematic diagram of a design configuration where the main rib and the positioning groove cooperate in an embodiment of this utility model.

[0024] Figure 5 This is a schematic diagram of a design configuration where the main rib and the positioning groove cooperate in an embodiment of this utility model.

[0025] Figure 6 This is a schematic diagram of the air guide tube in an embodiment of this utility model.

[0026] Figure 7 This is an exploded view of the axial flow fan in an embodiment of this utility model.

[0027] In the diagram: 1. Air outlet mesh; 2. Air duct; 3. Rivet; 4. Bolt; 5. Limiting ring; 6. Mounting plate; 7. Motor; 8. Mounting bracket; 9. Mounting groove; 10. Mounting block; 11. Main rib; 12. Mesh cover; 13. Threaded hole; 14. Through hole; 15. Axial flow blade. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings, and specific embodiments will be given.

[0029] like Figure 2 , Figure 3 , Figure 6 As shown, the mounting housing includes an air duct 2 and an air outlet net 1 detachably connected to the air duct 2. Several mounting blocks 10 are detachably connected to the air outlet net 1 along its circumference. The air duct 2 has mounting grooves 9 for locking the sides and bottom of the mounting blocks 10. The mounting blocks 10 and the side walls of the mounting grooves 9 are detachably connected.

[0030] Specifically, the air outlet mesh 1 includes a mesh cover 12 and several main ribs 11 fixed circumferentially along the mesh cover 12. The mounting block 10 has positioning grooves for locking the ends of the main ribs 11. In this embodiment, combined with Figure 4 As shown, the end of the main rib 11 extends out of the mesh cover 12. A positioning groove is opened on the side surface of the mounting block 10 facing the main rib 11, so that the end of the main rib 11 can be directly inserted into the positioning groove. The positioning groove can limit the movement of the air outlet mesh 1 in all directions, that is, the main rib 11 and the positioning groove are engaged.

[0031] The mounting groove 9 has a straight wall surface, and the mounting block 10's side surface is in contact with the straight wall surface of the mounting groove 9. In actual design, the mounting block 10 is designed as a cuboid for easy processing. Threaded holes 13 are provided on both sides of the positioning groove on the mounting block 10. Multiple threaded holes 13 can be provided depending on the actual situation. Through holes 14 are provided on the side wall of the mounting groove 9 to communicate with the threaded holes 13. During assembly, existing bolts 4 are passed through the through holes 14 and screwed into the threaded holes 13. In actual design, if the through holes 14 have smooth inner walls, the mounting groove 9 and through holes 14 can be formed directly during the fabrication of the air duct 2. However, if the inner wall of the through holes 14 needs to be threaded (hereinafter referred to as threaded through holes), the required threaded through holes need to be drilled on the side wall of the mounting groove 9 after it is formed. Since the threaded through holes and bolts 4 are threaded together, the threads may be damaged after long-term use. Therefore, it is preferable that the through holes 14 have smooth inner walls.

[0032] During actual assembly, the mounting block 10 is snapped onto the end of the main rib 11, and then the mounting block 10 is inserted into the mounting groove 9 for assembly. Finally, the existing bolt 4 is taken, passed through the through hole 14, and screwed into the threaded hole 13.

[0033] In another embodiment of this utility model, a different design method for the main rib 11 and the positioning groove is provided, combined with Figure 5 As shown, the end of the main rib 11 is provided with a bent part, and the bent part is connected to a limiting member. The limiting member is in the shape of a ring (i.e., the limiting ring 5). The axis of the limiting member is perpendicular to the axis of the main rib 11. The positioning groove is opened vertically. The bent part is stuck in the positioning groove. The width of the limiting member is greater than the width of the positioning groove. The limiting member is stuck between the bottom of the positioning groove and the bottom of the mounting groove 9. Thus, the setting of the limiting member restricts the vertical movement of the air outlet net 1.

[0034] The solution in this embodiment can also limit the movement of the air outlet 1 in all directions, and the main ribs 11 and the limiting component structure on the air outlet 1 can directly adopt the existing air outlet 1 structure (the air outlet 1 structure when assembled with rivets 3 and bolts 4) without modifying the air outlet 1 structure.

[0035] In actual design, a positioning part for positioning the limiting part can also be provided on the mounting block 10. For example, a protrusion can be designed as a positioning part to be inserted into the middle of the limiting ring 5. Alternatively, a threaded hole 13 can be opened directly at the position where the mounting block 10 and the limiting ring 5 are aligned, and the bolt 4 can be screwed into this position directly. Both of these methods can improve the limiting effect on the air outlet 1.

[0036] In another embodiment of this utility model, to avoid errors during drilling of the threaded hole 13 on the mounting block 10, which could lead to the threaded hole 13 not being fully aligned with the through hole 14, in this embodiment, the through hole 14 is a strip-shaped hole (see...). Figure 6The through hole 14 in the lower right corner has a width equal to the inner diameter of the threaded hole 13. All the projections of the threaded holes 13 toward the direction of the threaded hole are inside the threaded hole, which reduces the positional accuracy requirement of the threaded hole 13.

[0037] In another embodiment of this utility model, such as Figure 7 As shown, an axial flow fan is also disclosed, including a mounting housing and axial flow blades 15 installed inside the mounting housing. A mounting plate 6 is provided at the end of the air guide duct 2 facing away from the air outlet 1. A driving component for driving the axial flow blades 15 to rotate is also mounted on the mounting plate 6. Specifically, a rotating shaft is provided in the middle of the axial flow blades 15. The driving component includes a motor 7 and a mounting bracket 8 for mounting the motor 7. The output shaft of the motor 7 and the rotating shaft are connected in a conventional manner. The motor 7 drives the rotating shaft to rotate, thereby driving the axial flow blades 15 to rotate. The mounting bracket 8 and the mounting plate 6 are detachably connected. Specifically, the mounting bracket 8 includes a snap-fit ​​ring snapped onto the outer wall of the motor 7 and several L-shaped rods fixed circumferentially along the snap-fit ​​ring. The ends of the L-shaped rods are bolted to the mounting plate 6.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A mounting housing, characterized in that: It includes an air duct and an air outlet screen that can be detachably connected to the air duct. Several mounting blocks are detachably connected to the air outlet screen along its circumference. The air duct has mounting grooves for locking the sides and bottom of the mounting blocks. The mounting blocks and the side walls of the mounting grooves are detachably connected.

2. The mounting housing according to claim 1, characterized in that: The air outlet net includes a net cover and several main ribs fixed along the circumference of the net cover. The mounting block has positioning grooves for engaging with the ends of the main ribs.

3. The mounting housing according to claim 2, characterized in that: The main rib has a bent portion at its end, and the bent portion is connected to a limiting member. The axis of the limiting member is perpendicular to the axis of the main rib. The positioning groove is vertically opened, and the bent portion is stuck in the positioning groove. The width of the limiting member is greater than the width of the positioning groove, and the limiting member is stuck between the bottom of the positioning groove and the bottom of the installation groove.

4. The mounting housing according to claim 3, characterized in that: The limiting component is annular, and the mounting block is provided with a positioning part for positioning the limiting component.

5. The mounting housing according to claim 2, characterized in that: The mounting block has threaded holes on both sides of the positioning groove, and the side wall of the mounting groove has through holes for communicating with the threaded holes. It also includes bolts for passing through the through holes and connecting with the threaded holes.

6. The mounting housing according to claim 5, characterized in that: The through hole is a strip-shaped hole, the width of which is equal to the inner diameter of the threaded hole, and the projections of all threaded holes toward the strip-shaped hole are within the strip-shaped hole.

7. The mounting housing according to claim 5, characterized in that: The side of the mounting groove is a straight wall, and the side of the mounting block is in contact with the straight wall of the mounting groove.

8. An axial flow fan, characterized in that: It includes the mounting housing as described in any one of claims 1-7 and the axial flow blades mounted within the mounting housing.

9. The axial flow fan according to claim 8, characterized in that: The air guide tube is provided with a mounting plate at the end facing away from the air outlet, and a drive component for driving the axial flow blades to rotate is also installed on the mounting plate.

10. The axial flow fan according to claim 9, characterized in that: The drive unit includes a motor and a mounting bracket for mounting the motor, the mounting bracket and the mounting plate being detachably connected.

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