AU2017200110A1 - Mixed flow axial fan assembly - Google Patents

Abstract

Abstract The utility model provides a mixed flow axial fan assembly, comprising an axial fan and a skeleton bustle pipe, wherein the axial fan is mounted in the skeleton bustle pipe, the skeleton bustle pipe is a mixed flow bustle pipe, the mixed flow bustle pipe comprising a flow-guide pressurized area and an air flow spreading area used for discharging air, the air flow spreading area being located in a downstream of the flow-guide pressurized area, and the air flow spreading area comprising a circumferential air discharging area and an axial air discharging area. The advantages of the utility model are that the bustle pipe uses a skeleton support structure, not only satisfying the strength requirement for hoisting the axial fan but also changing an air flow direction blown from the axial fan by means of flow-guide pressurization below the bustle pipe and a spreading structure above the bustle pipe; and the axial fan not only discharges air in the vertical direction but also discharges air all around, forming an air blowing effect of mixed flow air. The utility model breaks through the mode that a traditionally mounted axial fan can only intake air and discharge air in the same direction.

Description

Mixed flow axial fan assembly 2017200110 06 Jan 2017

Technical Field [0001] The present utility model relates to an axial fan, and particularly relates to a mixed flow axial fan assembly.

Background [0002] Vehicle overhead air conditioner comprises an outdoor unit, an indoor unit and an air intaking and discharging channel, wherein the air intaking and discharging channel is mounted in a vehicle top, the outdoor unit comprises an air regulation system consisting of a condenser, an evaporator, a compressor, an evaporative fan and a condensing fan and an air channel support. The evaporative fan or the condensing fan can be divided into a centrifugal fan and an axial sub machine, wherein during the operation of the centrifugal fan, an air flow axially enters into an impeller space from the fan, and then on one hand rotates with the impeller under the driving of the impeller and on the other hand improves the energy under the inertia, the air flow leaves the impeller along the radial direction and works via a generated centrifugal force, and the air flow is discharged from a peripheral side part of the impeller. The axial fan is that the air flow flows in the axial direction into the impeller and flows out of the impeller along the axial direction. A prominent difference between the two is that the centrifugal fan changes the flow direction of a medium in an air pipe, but the axial fan does not change the flow direction of a medium in an air pipe. Compared with the axial fan, the mounting and structure of the centrifugal fan are relatively complex, the weight is relatively large, and the costs are relatively high. However, the flow directions of air intaking and air discharging of a traditional axial fan are consistent due to the stmcture of the axial fan itself, which largely limits an application field of the traditional axial fan.

Summary of the Utility Model 1 [0003] The technical problem to be solved by the present utility model is to provide a mixed flow axial fan assembly, the fan assembly intakes air axially, mixedly discharges air in an axial direction and in a circumferential direction, forming a specific mixedly flow air discharging mode and enlarging an application field of the axial fan. 2017200110 06 Jan 2017 [0004] The technical solutions used by the present utility mode in solving the above-mentioned technical problem are that a mixed flow axial fan assembly comprises an axial fan and a skeleton bustle pipe, said axial fan being mounted in said skeleton bustle pipe, characterized in that said skeleton bustle pipe is a mixed flow bustle pipe, said mixed flow bustle pipe comprises a flow-guide pressurized area and an air flow spreading area used for discharging air, the air flow spreading area being located in a downstream of the flow-guide pressurized area, and said air flow spreading area comprising a circumferential air discharging area and an axial air discharging area.

[0005] A further preferred solution of the present utility model are that said flow-guide pressurized area is enclosed by a sealed annular body, said circumferential air discharging area is an open side air discharging area which is located in the downstream of the sealed annular body, and said axial air discharging area is an axial air discharging port adjacent to the side air discharging area.

[0006] A further preferred solution of the present utility model are that said mixed flow bustle pipe comprises a base plate for mounting the axial fan, the sealed annular body and the base plate are connected via a longitudinal connection column distributed annually, the circumferential air discharging area is distributed between the sealed annular body and the base plate, and said axial air discharging area is distributed on the base plate.

[0007] A further preferred solution of the present utility model are that the axial fan comprises a driver, a rotary impeller and a base, the base being mounted in the middle of the base plate, the rotary impeller being provided between the base and the driver, and the axial air discharging area being distributed at a peripheral area of the base plate.

[0008] A further preferred solution of the present utility model is that the ratio 2 between the height of the sealed annular body and the height of the mixed flow bustle pipe is 1/5-1/2. 2017200110 06 Jan 2017 [0009] A further preferred solution of the present utility model is that a transverse connection column connected to an upper end of the longitudinal connection column is provided on the base plate.

[0010] A further preferred solution of the present utility model is that a segmented strengthening rib is provided on the periphery of the transverse connection column of the base plate. The segmented strengthening rib can increase the overall strength of the skeleton bustle pipe and guarantees normal air discharging in the axial direction and in the circumferential direction of an axial electrical motor at the same time.

[0011] A further preferred solution of the present utility model is that said skeleton bustle pipe is injection moulded.

[0012] Compared with the prior art, the advantages of the present utility model are that after axially intaking air, the fan assembly mixedly discharges air in an axial direction and a circumferential direction after being flow-guide pressurized, forming a specific mixedly flow air discharging mode and enlarging an application field of the axial fan. The bustle pipe uses a skeleton support structure, not only satisfying the strength requirement for mounting the axial fan but also changing an air flow direction blown from the axial fan by means of flow-guide pressurization below the bustle pipe and a spreading structure above the bustle pipe; and the axial fan not only discharges air in the vertical direction but also discharges air all around, forming an air blowing effect of mixed flow air. The utility model breaks through the mode that a traditionally mounted axial fan can only intake air and discharge air in the same direction.

Brief description of the drawing [0013] Fig. 1 is a perspective view I of the present utility model; [0014] Fig. 2 is a perspective view II of the present utility model; [0015] Fig. 3 is a perspective view of the skeleton bustle pipe of the present utility model; 3 [0016] Fig. 4 is a structural view of the axial fan of the present utility model; 2017200110 06 Jan 2017 [0017] Fig. 5 is a structural view of the axial fan being hoisted on the skeleton bustle pipe of the present utility model; [0018] Fig. 6 is an exploded view of the axial fan being hoisted on the skeleton bustle pipe of the present utility model; [0019] Fig. 7 is a structural view of the axial fan being located on the skeleton bustle pipe of the present utility model; [0020] Fig. 8 is a structural view of the axial fan being mounted on a caravan air conditioner of the present utility model.

Particular Embodiments [0021] The present utility model will be further described below in conjunction with the accompanying drawings and the embodiments.

[0022] As shown in figures 1-3, a mixed flow axial fan assembly comprises an axial fan 1 and a skeleton bustle pipe 2, wherein said axial fan 1 is mounted in said skeleton bustle pipe 2, said skeleton bustle pipe 2 being a mixed flow bustle pipe 2, said mixed flow bustle pipe 2 comprising a flow-guide pressurized area 21 and an air flow spreading area 22 used for discharging air, the air flow spreading area 22 being located in a downstream of the flow-guide pressurized area 21, and said air flow spreading area 22 comprising a circumferential air discharging area 23 and an axial air discharging area 24.

[0023] As shown in figures 1-3, the flow-guide pressurized area 21 is enclosed by a sealed annular body 3, said circumferential air discharging area 23 is an open side air discharging area 23 which is located in the downstream of the sealed annular body 3, and said axial air discharging area 24 is an axial air discharging port 24 adjacent to the side air discharging area 23. The mixed flow bustle pipe 2 comprises a base plate 4 for mounting the axial fan 1, the sealed annular body 3 and the base plate 4 are connected via a longitudinal connection column 5 distributed annually, the circumferential air discharging area 23 is distributed between the sealed annular body 3 and the base plate 4, and said axial air discharging area 24 is distributed on the base plate 4. 4 [0024] As shown in figures 2-4, the axial fan 1 comprises a driver 11, a rotary impeller 12 and a base 13, wherein the base 13 is mounted in the middle of the base plate 4, the rotary impeller 12 is provided between the base 13 and the driver 11, and the axial air discharging area 24 is distributed at a peripheral area of the base plate 4. 2017200110 06 Jan 2017 [0025] As shown in figure 3, the ratio between the height of the sealed annular body 3 and the mixed flow bustle pipe 2 is 1/5-1/2. The ratio between the height of the sealed annular body 3 and the height of the skeleton bustle pipe 2 is 1/5 or 1/3 or 1/2. Under the condition where the rotational speed of an electrical motor is 1250 rpm, the overall height of the skeleton bustle pipe is 70 mm, if a lateral part of the skeleton bustle pipe 2 is fully open (there is no sealed annular bodies), the discharge quality of air is only 470 m /h, under the condition where the lateral part of the skeleton bustle pipe 2 is fully sealed, the discharge quality of air is 424 m /h, and when the height of the sealed annular body 73 is 25 mm, the discharge quality of air reaches 514 m3/h. Experimental parameters are shown in the following table: [0026]

Height of the sealed annular body (unit mm) 0 14 24 30 35 70 Discharge quality of air of axial fan (mVh) 470 493 514 508 503 424 [0027] As shown in figure 3, a transverse connection column 6 connected to an upper end of the longitudinal connection column 5 is provided on the base plate 4. A segmented strengthening rib 7 is provided on the periphery of the transverse connection column 6 of the base plate 4. The skeleton bustle pipe 2 is injection moulded.

[0028] The caravan air conditioner using the mixed flow axial fan comprises an air conditioner body, wherein the air conditioner body is provided with a heat exchange system, a central air intaking channel and a peripheral side air discharging channel, the heat exchange system comprising an evaporator assembly 10 distributed annularly and a mixed flow axial fan located in the evaporator assembly 10, the axial fan being mounted on a water basin 9, the mixed flow axial fan 5 comprising an axial fan 1 and a skeleton bustle pipe 2, the axial fan being mounted in the skeleton bustle pipe 2, the skeleton bustle pipe 2 comprising a flow-guide pressurized area 21 and an air flow spreading area 22 used for discharging air, and the air flow spreading area 22 comprising a circumferential air discharging area 23 and an axial air discharging area 24. The axial fan is located in the evaporator assembly 8, an inner space of in the air conditioner is fully used, which is conducive to lowering the overall height of the whole air conditioner on the premise of exchanging heat effectively. When the air conditioner operates, the air in the vehicle enters into the inner part of the air conditioner body via the central air intaking channel, the fan assembly mixedly discharges air in an axial direction and a circumferential direction after being flow-guide pressurized, forming mixed air discharging, the discharged air is blown out from a peripheral side air discharging channel after being heat exchanged via the evaporator assembly, achieving the purpose of adjusting the temperature of the air in the vehicle. The bustle pipe uses a skeleton support structure, not only satisfying the strength requirement for mounting the axial fan but also changing an air flow direction blown from the axial fan by means of flow-guide pressurization below the bustle pipe and a spreading structure above the bustle pipe; and the axial fan not only discharges air in the vertical direction but also discharges air all around, forming an air blowing effect of mixed flow air. The utility model breaks through the mode that a traditionally mounted axial fan can only intake air in the vertical direction and discharge air in the vertical direction. 2017200110 06 Jan 2017 [0029] As shown in figures 5 and 6, the axial fan 1 is hoisted on the skeleton bustle pipe 2, and the air flow spreading area 22 on the skeleton bustle pipe 2 is located above the air flow pressurized area 21. As shown in figures 7 and 8, the axial fan 2 is located on the skeleton bustle pipe 2, and the air flow spreading area 22 on the skeleton bustle pipe 2 is located below the air flow pressurized area 21. In figure 8, the axial fan referred in the present utility model is applied in the caravan air conditioner.

[0030] The mixed flow axial fan assembly provided by the present utility model is described in details above, the principle and embodiments of the present utility 6 model are described by using specific examples herein, and the descriptions of the above-mentioned example is only used for helping to understand the present utility model and a core concept. It is to pointed out that a person skilled in the art, without departing from the principle of the present utility model, would also be able to make some improvements and modifications on the present utility model, and these improvements and modifications also fall within the claimed scope of protection of the claims of the present utility model. 2017200110 06 Jan 2017 [0031] It will be understood that the term “comprise” and any of its derivatives (eg comprises, comprising) as used in this specification is to be taken to be inclusive of features to which it refers, and is not meant to exclude the presence of any additional features unless otherwise stated or implied.

[0032] The reference to any prior art in this specification is not, and should not be taken as, an acknowledgement of any form of suggestion that such prior art forms part of the common general knowledge. 7

Claims (8)

1. Claims

   1. A mixed flow axial fan assembly, comprising an axial fan and a skeleton bustle pipe, said axial fan being mounted in said skeleton bustle pipe, characterized in that said skeleton bustle pipe is a mixed flow bustle pipe, said mixed flow bustle pipe comprises a flow-guide pressurized area and an air flow spreading area used for discharging air, the air flow spreading area being located in a downstream of the flow-guide pressurized area, and said air flow spreading area comprising a circumferential air discharging area and an axial air discharging area.
2. 2. The mixed flow axial fan assembly according to claim 1, characterized in that said flow-guide pressurized area is enclosed by a sealed annular body, said circumferential air discharging area is an open side air discharging area which is located in the downstream of the sealed annular body, and said axial air discharging area is an axial air discharging port adjacent to the side air discharging area.
3. 3. The mixed flow axial fan assembly according to claim 2, characterized in that said mixed flow bustle pipe comprises a base plate for mounting the axial fan, the sealed annular body and the base plate are connected via a longitudinal connection column distributed annually, the circumferential air discharging area is distributed between the sealed annular body and the base plate, and said axial air discharging area is distributed on the base plate.
4. 4. The mixed flow axial fan assembly according to claim 3, characterized in that the axial fan comprises a driver, a rotary impeller and a base, the base being mounted in the middle of the base plate, the rotary impeller being provided between the base and the driver, and the axial air discharging area being distributed at a peripheral area of the base plate.
5. 5. The mixed flow axial fan assembly according to claim 2, characterized in that the ratio between the height of the sealed annular body and the height of the mixed flow bustle pipe is 1/5-1/2.
6. 6. The mixed flow axial fan assembly according to claim 3, characterized in that a transverse connection column connected to an upper end of the longitudinal connection column is provided on the base plate.
7. 7. The mixed flow axial fan assembly according to claim 6, characterized in that a segmented strengthening rib is provided on the periphery of the transverse connection column of the base plate.
8. 8. The mixed flow axial fan assembly according to claim 1, characterized in that said skeleton bustle pipe is injection moulded.