KR20140001403A - Blower unit for vehicle - Google Patents

Abstract

Disclosed is a blower for a vehicle, wherein the blower has an improved structure in which not only whistle noise due to a gap between a cut-off region and a dual ring but also irregular rumble noise due to a resisting body on an air flow path can be minimized. The blower for a vehicle comprises: an intake unit allowing indoor air or outdoor air to flow into the same; a scroll case having an air inlet for communicating with the intake unit and coupled to the lower side of the intake unit; and a blower wheel and a blower motor installed inside the scroll case and blowing the air flowing from the air inlet to an air conditioning case, wherein the scroll case has the dual ring formed along the circumferential surface of the air inlet inside the same, the cut-off region on a connecting position between a circular flow path and spiral flow path for the air flowing into the air inlet, and at least one blocking rib blocking the part of a flow path formed between the cut-off region and the dual ring. In addition, the blocking rib connects the cut-off region and the dual ring, and the entire connecting surface of the blocking rib between the cut-off region and the dual ring is flat. Therefore, not only the whistle noise generated when the cut-off region is formed to be closed to the dual ring is prevented, but also the air uniformly flows along the flat surface of the blocking rib so that the irregular rumble noise is removed.

Description

TECHNICAL FIELD [0001] The present invention relates to a blower for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a fan apparatus for a vehicle, and more particularly, to a fan apparatus for a vehicle for selectively forcing forced air or outside air into an air conditioning case of a vehicle.

2. Description of the Related Art Generally, a vehicle air conditioner is an apparatus for heating or cooling an interior by introducing outside air into the room or circulating air in the room to heat or cool the room. The apparatus includes a blowing device for blowing the inside / outside air into the inside of the air conditioner case, Inside the air conditioning case, an evaporator for cooling action and a heater core for heating action are provided, and the air cooled or heated by the evaporator or the heater core is selectively blown into each part of the vehicle interior.

1 is a sectional view showing a schematic internal configuration of a conventional automotive air conditioner. 1, the vehicle air conditioner includes an air conditioning case 10 having a defrost vent 12 and a face vent 14 formed on one side thereof, and a blowing device (not shown) for forcibly circulating the inside air or the outside air An evaporator 30 for cooling the air supplied from the air blowing device 20 and a heater core 40 for heating the air supplied from the air blowing device 20 adjacent to the evaporator 30, . In this case, a filter 50 fixed to the case 52 is provided on the upstream side of the evaporator 30 and includes a tempo door (not shown) for selectively flowing air to the heater core 40 side.

2 is a cross-sectional view showing the inside of a conventional air blowing apparatus for a vehicle. 2, the air blowing apparatus 20 is provided with an inflow inlet 23 and an outside air inlet 24 on both sides of the upper portion thereof and is connected to the inflow inlet 23 and the inflow inlet 23 while rotating the inflow inlet 23 and the outside air inlet 24, An intake unit 21 having an inside / outside switching door 25 for selectively opening / closing the outside air inlet 24, a scroll case 22 coupled to a lower portion of the intake unit 21, And a blower wheel 26 and a blower motor 27 for blowing the axial air introduced from the air inlet 23 or the outside air inlet 24 in the radial direction.

In addition, an air inlet 29 is formed at an upper side of the scroll case 22, which is an area where the intake unit 21 and the scroll case 22 are coupled to face each other, and the air flowing into the upper end of the air inlet 29 is formed. An air filter 28 is provided for purification. In addition, the scroll case 22 includes an upper scroll case 91 and a lower scroll case 92, and the upper scroll case 91 and the lower scroll case 92 are fastened to each other to form a scroll case having a space therein ( As the 22 is manufactured, a blower wheel 26 and a blower motor 27 are installed in the inner space of the scroll case 22.

Figure 3 is a perspective view showing the inside of the upper scroll case of a conventional vehicle blower. Referring to FIG. 3, a circular air inlet 29 is formed in the upper scroll case 91, and a spiral air outlet 93 is formed at one side to blow air in the axial direction in a radial direction. In this case, the connection part of the start end of the air discharge port 93 connected to the spiral flow path in the circular flow path around the air inlet port 29 of the scroll case 22 is called a cut off part 94 and is cut. The air volume of the discharged air varies depending on the shape of the off portion 94.

In addition, the bell mouth 96 is formed on the air inlet 29 side of the scroll case 22 so as to reduce the inflow resistance of the air. The bell mouth 96 extends inward of the scroll case 22 along the edge of the air inlet 29 and protrudes. In addition, the dual ring 90 protrudes to have a predetermined height in the scroll case 22 along the circumferential surface at a position spaced apart from the bell mouse 96 by a predetermined distance. The dual ring 90 surrounds the upper end of the blower wheel 26 to prevent the air sucked by the rotation of the blower wheel 26 from spreading at the upper end of the blower wheel 26 and the vortex phenomenon.

However, the conventional vehicle blower may have a cutoff portion 94 when the cutoff portion 94 of the scroll case 22 and the dual ring 90 are close to each other, as shown in FIG. 3. There was a problem that whistle noise is generated due to a gap between the dual rings 90.

In order to solve such a conventional problem, the present invention provides a vehicle blower having an improved structure so as to minimize the whistle noise caused by the gap between the cut-off portion and the dual ring as well as the irregular rumble noise caused by the resistor on the air passage. to provide.

An air blower for a vehicle according to the present invention includes an intake unit for introducing an inside or an outside air, an air inlet for communicating with the intake unit, and a scroll case coupled to a lower portion of the intake unit, and air installed and introduced into the scroll case. It includes a blower wheel and a blower motor for blowing the air to the air conditioning case, the dual ring is formed along the circumferential surface of the air inlet in the scroll case, the scroll case of the circular flow path and the spiral flow path of air flowing into the air inlet A cut off portion is formed at the connecting position, and has at least one blocking rib for blocking a portion of the flow path formed between the cut off portion and the dual ring.

In addition, the blocking rib is connected between the cut-off portion and the dual ring, but the entire connecting surface is composed of a flat surface.

The vehicle blower according to the present invention not only prevents a phenomenon in which whistle noise occurs when the distance between the cut-off portion and the dual ring is close, and the air is flat through a structure of a blocking rib composed of a flat surface. It is a very useful invention that can even remove irregular rumble noise by showing uniform flow in the air.

1 is a sectional view showing a schematic internal structure of a conventional automotive air conditioner,
2 is a cross-sectional view showing the inside of a conventional ventilator for a vehicle,
3 is a perspective view illustrating the inside of an upper scroll case of a conventional vehicle blower;
4 is a cross-sectional view illustrating an interior of a vehicle blower according to a first embodiment of the present invention.
5 is a perspective view illustrating the inside of a scroll case of a vehicle blower according to a first embodiment of the present invention;
6 is a cross-sectional view taken along line AA of FIG. 5,
7 is a cross-sectional view illustrating an interior of a vehicle blower according to a second exemplary embodiment of the present invention.
8 is a cross-sectional view along the line BB of FIG.
9 is a graph comparing the noise level according to the present invention and a conventional vehicle blower.

Hereinafter, the technical configuration of the vehicle blower according to the accompanying drawings in detail as follows.

4 is a cross-sectional view illustrating the interior of a vehicle blower according to a first embodiment of the present invention.

As shown in FIG. 4, the vehicle blower 120 according to the first embodiment of the present invention is installed in a vehicle air conditioner, and is installed at one side of an air conditioner case in which an evaporator and a heater core are sequentially installed therein. And, it performs the function of selectively blowing the inside and outside air to the interior of the air conditioning case. That is, the vehicle air blowing apparatus 120 includes an intake unit 121, a scroll case 122, a blower wheel 126, and a blower motor 127.

The intake unit 121 has an internal air inlet 123 and an external air inlet 124 formed at both upper sides thereof, and includes an internal and external air conversion door 125 therein. The internal / external air switching door 125 selectively opens and closes the internal air inlet 123 and the external air inlet 124 according to the driving of turning the internal air inlet 123 and the external air inlet 124 to intake unit 121. Selectively flow into the inside.

The scroll case 122 is attached to the lower portion of the intake unit 121. In addition, an air inlet 129 is formed at an upper portion of the scroll case 122, which is a portion where the intake unit 121 and the scroll case 122 face each other. The air inlet 129 is to communicate with the intake unit 121, and introduces air introduced through the internal air inlet 123 or the external air inlet 124 into the scroll case 122. In this case, the air inlet 129 has a circular shape corresponding to the blower wheel 126 and the blower motor 127 which will be described later.

The blower wheel 126 and the blower motor 127 are provided inside the scroll case 122 to forcibly circulate air introduced into the air inlet 129 to the air conditioning case to blow air. In this case, the blower wheel 126 and the blower motor 127 are disposed directly below the air inlet 129 to convert the axial air introduced into the air inlet 129 into a radial direction to blow air. In addition, an air filter 128 is provided upstream of the air inlet 129, that is, the upper end of the air inlet 129. The air filter 128 purifies the air flowing into the air inlet 129.

In this case, the scroll case 122 includes an upper scroll case 131 and a lower scroll case 132, and the upper scroll case 131 and the lower scroll case 132 are fastened to each other to form a space therein. As the case 122 is manufactured, the blower wheel 126 and the blower motor 127 are installed in the space formed in the scroll case 122.

5 is a perspective view illustrating the inside of a scroll case of a vehicle blower according to a first exemplary embodiment of the present invention, and FIG. 6 is a cross-sectional view taken along the line A-A of FIG. 5.

5 and 6, the dual ring 160 is formed along the circumferential surface of the air inlet 129 inside the scroll case 122. More specifically, the upper scroll case 131 is formed with a circular air inlet 129, the spiral air discharge port 150 is formed on one side to blow the air in the axial direction in the radial direction. Hereinafter, the upper scroll case 131 will be described as a scroll case 122 for convenience of description.

In addition, a cut-off portion 155 is formed in the scroll case 122 at a connection position between a circular flow path and a spiral flow path of air flowing into the air inlet 129. That is, the cut-off portion 155 is formed at the connection portion of the start end of the air discharge port 150 connected to the spiral flow path in the circular flow path around the air inlet 129 of the scroll case 122. In addition, the bell mouth 156 is formed at the air inlet 129 side of the scroll case 122 to reduce the inflow resistance of the air. The bell mouse 156 extends and protrudes inward of the scroll case 122 along the edge of the air inlet 129.

In addition, the dual ring 160 is formed inside the scroll case 122 along the circumferential surface of the air inlet 129. That is, the dual ring 160 is formed to protrude to the inside of the scroll case 122 along the circumferential surface at a position spaced apart from the bell mouse 156 by a predetermined distance. The dual ring 160 is formed in the shape of a circular ring having a predetermined height, and the air sucked by the rotation of the blower wheel 126 is wrapped around the top of the blower wheel 126 at the top of the blower wheel 126. Prevents spreading and vortex flow.

In particular, the vehicle blower 120 according to the first embodiment of the present invention includes a first blocking rib 161 and a second blocking rib 162 between the cut-off portion 155 and the dual ring 160. do. The first blocking rib 161 and the second blocking rib 162 block a portion of the flow path formed between the cut off portion 155 and the dual ring 160. As a result, the first blocking rib 161 and the second blocking rib 162 connect the cutoff portion 155 and the dual ring 160 to block the flow path, thereby cutting off the cutoff portion 155 and the dual ring ( It is possible to prevent a phenomenon in which whistle noise occurs when the distance between the 160 is close.

In this case, the first blocking rib 161 and the second blocking rib 162 are disposed to be spaced apart from each other by a predetermined distance, and the first blocking rib 161 and the second blocking rib 162 are cut from the dual ring 160, respectively. The off site 155 is integrally formed in the dual ring 160. Through this configuration, the blocking ribs may be integrally molded in the manufacture of the dual ring 160 to facilitate manufacturing.

Hereinafter, a vehicle blower of the present invention through a more preferred embodiment of the present invention will be described.

FIG. 7 is a cross-sectional view illustrating the interior of a vehicle blower according to a second exemplary embodiment of the present invention, and FIG. 8 is a cross-sectional view taken along line B-B of FIG. 7.

7 and 8, the vehicle blower according to the second embodiment of the present invention will be described only with respect to the configuration different from the description of the same configuration as compared to the first embodiment will not be repeated descriptions, Detailed descriptions of overlapping configurations will be omitted.

The vehicle blower 120 according to the second embodiment of the present invention includes a blocking rib between the cut-off portion 155 and the dual ring 160. In this case, the blocking rib is connected between the cut-off portion 155 and the dual ring 160, but the entire connecting surface is a flat surface.

That is, the flat member 170 is coupled between the first blocking rib 161 and the second blocking rib 162 to form a flat surface in which the entire blocking rib is uniform.

Referring to FIG. 6, the whistle noise may be prevented by the rib structure in the first embodiment. However, a space is formed between the first blocking ribs 161 and the second blocking ribs 162 by spaced apart gaps, thereby indicating an irregular flow of air, which causes air to flow through the first blocking ribs 161 and the second blocking ribs 162. Each of the blocking ribs 162 has a disadvantage of generating irregular rumble noise.

However, referring to FIG. 8, in the second embodiment, the air has a uniform flow through the blocking rib formed of the flat surface, thereby eliminating not only whistle noise but also irregular rumble noise.

In addition, through the structure in which the flat member 170 is coupled between the first blocking rib 161 and the second blocking rib 162, the flat surface structure of the blocking rib may be realized in a relatively simple configuration. However, in addition to this, the blocking ribs may be formed by integrally molding the flat surface without providing a separate flat member 170.

9 is a graph comparing the noise level according to the present invention and a conventional vehicle blower.

Referring to FIG. 9, it can be seen that the first embodiment exhibits lower noise than the conventional dual ring structure without the blocking rib, and the second embodiment exhibits lower noise than the first embodiment. .

The vehicle blower according to the present invention has been described with reference to the embodiment shown in the drawings, but this is only an example, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Accordingly, the scope of the true technical protection should be determined by the technical idea of the appended claims.

120: blower 121: intake unit
122: scroll case 123: bet inlet
124: outdoor air inlet 125: internal and external air conversion door
126: Blower wheel 127: Blower motor
128: air filter 129: air inlet
150: air discharge port 155: cut-off site
160: dual ring 161: first blocking rib
162: second blocking rib 170: flat member

Claims (4)

An intake unit 121 for introducing inside or outside air, an air inlet 129 for communicating with the intake unit 121, and a scroll case 122 coupled to a lower portion of the intake unit 121; A blower wheel 126 and a blower motor 127 are installed inside the scroll case 122 to blow air introduced into the air conditioning case, and the air inlet 129 is disposed inside the scroll case 122. In the vehicle blower that the dual ring 160 is formed along the circumferential surface,
A cut-off portion 155 is formed at the scroll case 122 at a connection position between a circular flow path and a spiral flow path of air flowing into the air inlet 129; And at least one blocking rib blocking a portion of a flow path formed between the cut-off portion (155) and the dual ring (160). The method according to claim 1,
The blocking rib is connected between the cut-off portion 155 and the dual ring 160, the vehicle blower, characterized in that the entire connection surface is composed of a flat surface. The method according to claim 1,
The blocking ribs are formed in a pair of spaced apart from each other, the pair of blocking ribs for a vehicle blower, characterized in that formed integrally extending from the dual ring (160). The method of claim 3,
A flat blower for a vehicle, characterized in that the flat surface is coupled between the pair of blocking ribs constitute a flat surface.

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