Double-impeller convection booster fan

Abstract

The utility model discloses a double-impeller convection booster fan which comprises a shell, a first motor is installed in the shell, a first impeller is fixed to the end of a driving shaft of the first motor, a rear cover covers the end, away from the first impeller, of the shell and comprises a supporting table, and a second motor can be installed outside the supporting table. A second impeller is fixed to the end of a driving shaft of the second motor. The second motor is installed outside the rear cover, double-impeller pressurization can be achieved on the original basis, the smoke exhaust and ventilation effects are effectively guaranteed, the whole booster fan does not need to be replaced, and cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and more specifically to a double-impeller convection booster fan. Background Art

[0002] Booster fans have the functions of smoke exhaust and ventilation, and are mostly used in tunnels, basements and other places. Existing booster fans are mostly installed at one end of the pipe during installation, that is, one end of the booster fan is fixed to one end of the smoke exhaust pipe. As the working time of the booster fan increases, the speed of its internal motor will decrease, resulting in worse smoke exhaust and ventilation effects. Currently, the smoke exhaust and ventilation effects are maintained by regularly replacing the entire booster fan. Although this method is convenient, it is costly, so there is an urgent need to improve it. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and to provide a double-impeller convection booster fan. By installing a second motor on the outside of the rear cover, double-impeller boosting can be achieved on the original basis, effectively ensuring the smoke exhaust and ventilation effect, without replacing the entire booster fan, thereby reducing costs.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a double-impeller convection booster fan, comprising a shell, a first motor is installed inside the shell, a first impeller is fixed to the end of the driving shaft of the first motor, an end of the shell away from the first impeller is covered with a rear cover, the rear cover comprises a support platform, a second motor can be installed outside the support platform, and a second impeller is fixed to the end of the driving shaft of the second motor.

[0006] Furthermore, the rear cover includes a connecting ring, the connecting ring is fixedly connected to the end of the shell by bolts, the connecting ring is connected to the support platform by a connecting frame, and the connecting frame is a grid structure.

[0007] Furthermore, the size of the support platform is smaller than the size of the connecting ring, and the support platform and the connecting ring are offset so that the connecting frame forms a conical shape.

[0008] Furthermore, the rear cover is connected to the shell, and the support platform can be located inside the shell or outside the shell.

[0009] Furthermore, a base is installed at one end of the second motor, and the base can abut against the surface of the support platform and be fixedly connected to the support platform by bolts. The surface of the support platform is provided with a plurality of ventilation holes, and the base includes through holes corresponding to the ventilation holes, and the through holes are directly opposite to the ventilation holes.

[0010] Furthermore, the first impeller is sleeved on the outside of the driving shaft of the first motor and is connected and fixed to the driving shaft of the first motor via a screw.

[0011] Furthermore, a support frame is connected to the outer side of the first motor, and the support frame is fixed to the inner wall of the shell.

[0012] Furthermore, a stud is provided on the inner wall of the shell away from the rear cover, and the support frame includes a limiting column corresponding to the stud, the side surface of the limiting column abuts against the end of the stud, and the limiting column and the stud are fixed by bolt connection.

[0013] Furthermore, the inner wall of the shell is provided with a limiting rib, the support frame includes a limiting notch, and the limiting rib can be inserted into the limiting notch for limiting.

[0014] The beneficial effects of the utility model are:

[0015] By installing a second motor outside the rear cover, the smoke exhaust ventilation effect can be improved without dismantling and replacing the original booster fan. This is not only convenient and quick to install, but also can effectively reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural diagram of the first embodiment;

[0017] Figure 2 is a cross-sectional view of embodiment 1;

[0018] Figure 3 is a schematic diagram of the structure of the rear cover;

[0019] Figure 4 This is a structural diagram of the second embodiment.

[0020] Figure numerals: 1. Shell; 11. Stud; 12. Limiting rib; 2. First motor; 3. Support frame; 31. Limiting column; 32. Limiting notch; 4. First impeller; 5. Screw; 6. Rear cover; 61. Connecting ring; 62. Connecting frame; 63. Support platform; 64. Ventilation hole; 7. Second motor; 71. Second impeller; 72. Base; 73. Through hole; 8. Double-headed motor. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1:

[0023] like Figures 1 to 3 As shown, a double-impeller convection booster fan includes a shell 1, a first motor 2 is installed inside the shell 1, a first impeller 4 is fixed to the end of the driving shaft of the first motor 2, and the first impeller 4 is driven by the first motor 2 to rotate to achieve the function of smoke exhaust and ventilation. When the first motor 2 works for a long time and causes the smoke exhaust effect to decrease, the smoke exhaust and ventilation effect can be improved by adding a second motor 7.

[0024] Specifically, the end of the shell 1 away from the first impeller 4 is covered with a rear cover 6, and the rear cover 6 includes a connecting ring 61 and a support platform 63. The connecting ring 61 is fixedly connected to the end of the shell 1 by bolts, and the connecting ring 61 is connected to the support platform 63 by a connecting frame 62. The second motor 7 can be installed on the outside of the support platform 63, and a base 72 is installed at one end of the second motor 7. The base 72 can abut the surface of the support platform 63 and be fixedly connected to the support platform 63 by bolts. A second impeller 71 is fixed to the end of the driving shaft of the second motor 7. The size of the second motor 7 is smaller than that of the first motor 2. By installing the second motor 7 on the outside of the rear cover 6, the smoke exhaust and ventilation effect can be improved without disassembling and replacing the original booster fan. It is not only convenient and quick to install, but also can effectively reduce costs.

[0025] The connecting frame 62 is a grid-like structure, a plurality of ventilation holes 64 are provided on the surface of the supporting platform 63, the base 72 includes through holes 73 corresponding to the ventilation holes 64, and the through holes 73 are directly opposite to the ventilation holes 64. By setting the grid-like connecting frame 62, ventilation holes 64 and through holes 73, the influence of the rear cover 6 and the second motor 7 on the normal ventilation inside the shell 1 can be effectively reduced.

[0026] Among them, the size of the support platform 63 is smaller than the size of the connecting ring 61, and the support platform 63 is offset from the connecting ring 61 so that the connecting frame 62 forms a conical shape. Therefore, when the rear cover 6 is connected to the shell 1, the support platform 63 is located inside the shell 1. Through this design, not only can the impact of the rear cover 6 on wind power transmission be reduced, but the second motor 7 can also be embedded in the shell 1 to prevent the overall size from being affected after the second motor 7 is installed.

[0027] The first impeller 4 is sleeved on the outside of the driving shaft of the first motor 2 and is connected and fixed to the driving shaft of the first motor 2 via a screw 5. The above design facilitates the disassembly and assembly of the first impeller 4.

[0028] A support frame 3 is connected to the outside of the first motor 2, and the support frame 3 is fixed to the inner wall of the shell 1. Specifically, the first motor 2 is fixed to the support frame 3, and a stud 11 is provided on the inner wall of the shell 1 away from the rear cover 6. The support frame 3 includes a limiting column 31 corresponding to the stud 11, and the side of the limiting column 31 abuts against the end of the stud 11. The limiting column 31 and the stud 11 are fixed by bolts. Through the above connection method, the detachable design of the first motor 2 can be realized, thereby facilitating the disassembly and assembly of the first motor 2.

[0029] The inner wall of the shell 1 is provided with a limiting rib 12, and the support frame 3 includes a limiting notch 32. The limiting rib 12 can be inserted into the limiting notch 32 for limiting. During assembly, the first motor 2 is first fixed to the support frame 3, and then the first motor 2 and the first impeller 4 are fixed to form a fan assembly. After the limiting notch 32 is aligned with the limiting rib 12, the fan assembly is inserted into the shell 1 so that the limiting rib 12 is inserted into the limiting notch 32 until the side of the limiting column 31 abuts against the end of the stud 11. Finally, the fan assembly and the shell 1 are fixed by bolts. Through the cooperation of the limiting notch 32 and the limiting rib 12, the fan assembly can be installed and positioned.

[0030] Embodiment 2:

[0031] The difference between Example 2 and Example 1 is that Example 2 cancels the second motor 7, and the support platform 63 is located outside the shell 1. Example 2 solves the problem of poor smoke exhaust and ventilation effects caused by long-term use by only replacing the first motor 2, and the first motor 2 can be replaced with a double-headed motor 8, which can also achieve the effect of double-impeller supercharging, thereby improving the smoke exhaust and ventilation effects.

[0032] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A double-impeller convection booster fan, comprising a housing (1), a first motor (2) being installed inside the housing (1), a first impeller (4) being fixed to the end of a drive shaft of the first motor (2), characterized in that: The end of the housing (1) away from the first impeller (4) is covered with a rear cover (6), and the rear cover (6) includes a support platform (63). A second motor (7) can be mounted outside the support platform (63), and a second impeller (71) is fixed to the end of the drive shaft of the second motor (7).

2. A double-impeller convection booster fan according to claim 1, characterized in that: The rear cover (6) comprises a connecting ring (61), the connecting ring (61) is fixedly connected to the end of the housing (1) by means of bolts, the connecting ring (61) is connected to the support platform (63) by means of a connecting frame (62), and the connecting frame (62) is a grid-like structure.

3. A double-impeller convection booster fan according to claim 2, characterized in that: The size of the support platform (63) is smaller than the size of the connecting ring (61), and the support platform (63) and the connecting ring (61) are offset so that the connecting frame (62) forms a conical shape.

4. A double-impeller convection booster fan according to claim 1, characterized in that: The rear cover (6) is connected to the shell (1), and the support platform (63) can be located inside the shell (1) or outside the shell (1).

5. A double-impeller convection booster fan according to claim 1, characterized in that: A base (72) is installed at one end of the second motor (7), and the base (72) can abut against the surface of the support platform (63) and be fixedly connected to the support platform (63) by bolts. The surface of the support platform (63) is provided with a plurality of ventilation holes (64), and the base (72) includes through holes (73) corresponding to the ventilation holes (64), and the through holes (73) are directly opposite to the ventilation holes (64).

6. A double-impeller convection booster fan according to claim 1, characterized in that: The first impeller (4) is sleeved on the outside of the drive shaft of the first motor (2) and is connected and fixed to the drive shaft of the first motor (2) via a screw (5).

7. A double-impeller convection booster fan according to claim 1, characterized in that: A support frame (3) is connected to the outside of the first motor (2), and the support frame (3) is fixed to the inner wall of the housing (1).

8. A double-impeller convection booster fan according to claim 7, characterized in that: A stud (11) is provided on the inner wall of the shell (1) away from the rear cover (6); the support frame (3) comprises a limiting column (31) corresponding to the stud (11); the side surface of the limiting column (31) abuts against the end of the stud (11); and the limiting column (31) and the stud (11) are fixed by bolt connection.

9. A double-impeller convection booster fan according to claim 7, characterized in that: The inner wall of the shell (1) is provided with a limiting rib (12), the support frame (3) comprises a limiting notch (32), and the limiting rib (12) can be inserted into the limiting notch (32) for limiting.

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