KR100961018B1 - Double wheel blower fan and blower having this of car airconditioner - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double blower fan and a blower for an automobile air conditioner having the same, and aims to increase the air flow rate and wind pressure of the blower air.

The dual blower fan 10 of the present invention includes: a first centrifugal wheel 20 having a hub 22 and first blades 24 arranged downward from the hub; A connecting plate 32 extending radially from the lower end of the first centrifugal wheel, second blades 34 arranged upward from the connecting plate and a support ring 36 connecting the upper ends of the second blades. It comprises a second centrifugal wheel (30). In addition, the blower of the present invention, the first betge inlet 61 and the second air inlet 62 and the second betge inlet 64 which is opened and closed by the second switching door 65 is opened and closed by the first switching door (63). An intake duct 60 having a); A scroll case 50 installed below the intake duct and having an air discharge port 56 and upper and lower air inlets 52 and 54; A dual blower fan (10) disposed in the scroll case to rotate by a motor (40); In addition, the guide duct 70 is formed to communicate the inside and the lower air inlets of the intake duct and form a first guide passageway 72 through which the opening degree is controlled by the second switching door.

Blower, Blower, Centrifugal Fan

Description

DOUBLE WHEEL BLOWER FAN AND BLOWER HAVING THIS OF CAR AIRCONDITIONER}

1A is a schematic cross-sectional view showing a double blower fan according to the present invention.

1B is a schematic cross-sectional view showing another example of a double blower fan according to the present invention.

2 is a cross-sectional view showing Embodiment 1 of a blower to which a double blower fan according to the present invention is applied.

FIG. 3 is a plan view illustrating the inside of the scroll case in FIG. 2.

4 is a cross-sectional view showing a second embodiment of the blower to which the double blower fan according to the present invention is applied.

FIG. 5 is a front view illustrating an example of a switching door in FIG. 4.

6 is a cross-sectional view showing a third embodiment of the blower to which the double blower fan according to the present invention is applied.

7 is a cross-sectional view showing a fourth embodiment of the blower to which the double blower fan according to the present invention is applied.

<Description of Symbols for Main Parts of Drawings>

10: double blower fan, 12: partition wall,                 

20: first centrifugal wheel, 22: hub,

24: 1st blade, 30: 2nd centrifugal wheel,

32: connecting plate, 34: the second blade,

36: support ring, 40: motor,

50: scroll case, 52: upper air inlet,

54: lower air inlet, 56: air outlet,

60: intake duct, 61, 64, 66: air inlet,

61a, 62a: protrusion, 62: air inlet,

63, 65, 67: switching door, 63a: notch,

72, 74: guide passage, 76, 78: ventilation control door

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double blower fan and a blower of an automobile air conditioner having the same. In particular, the present invention relates to a double blower fan and a vehicle air conditioner having the same, which can increase the air volume by blowing air by two centrifugal wheels integrally formed. It is about a blower.

The air conditioner of a vehicle blows indoor or outdoor air of a vehicle by a blower, and heats the air with a refrigerant flowing through an evaporator, or heat exchanges with coolant flowing through a heater core to make a cold or warm state and blows it into the interior of a vehicle. It is a device that cools or heats a car interior.

The blower constituting the air conditioner includes an intake box having an internal air inlet and an external air inlet and having a switching door for selectively opening and closing the internal air inlet and the external air inlet, a scroll case provided below the intake box, and the scroll A centrifugal fan installed in the inner center of the case and radially blowing air from the internal / external air inlet in the axial direction toward the discharge port of the scroll case, and a motor installed in the lower portion of the scroll case to rotate the centrifugal fan. It is made, including. The centrifugal fan has a hub condensed to the motor and a centrifugal wheel in which approximately 36 to 48 blades are arranged along the edge of the hub. Therefore, when the centrifugal wheel is rotated in accordance with the rotation of the motor, suction force is generated, and air is introduced from the intake duct in the axial direction, and the air flows through the blades to obtain velocity energy and rotate and discharge along the scroll case to increase the wind pressure.

Such a blower having a conventional structure does not satisfy the required air volume as the resistance of the air conditioning system increases, noise is generated a lot, and there is a limit in improving the heating and cooling performance.

Therefore, a blower capable of providing a compact and high blowing efficiency is required to satisfy the required air volume, and in consideration of this, a blower to which an intake unit as disclosed in Japanese Patent Application Laid-open No. Hei 5-10016 has been proposed. In this prior art, one outside air inlet and four inside air inlets are provided, and air passages for communicating them are provided, and the inside of the blower fan is partitioned up and down by the hub to increase the air volume. have. However, in this prior art, only the air is introduced into the upper and lower parts of the blower fan to blow air, and thus there is no means for increasing the wind pressure, thereby limiting the purpose of compacting and increasing efficiency of the blower.

The present invention has been made in consideration of the above-described conventional problems, and an object of the present invention is to provide a double blower fan that can increase the air flow rate and the wind pressure by blowing air by compressing air by two centrifugal wheels integrally.

In order to achieve the above object, the double blower fan according to the present invention, the hub and the first centrifugal wheel having a plurality of first blades arranged downward along the edge of the hub and formed to be adhered to the shaft of the blower motor, and A second plate having a connecting plate extending radially from a lower end of the first centrifugal wheel, and a plurality of second blades arranged upwardly along an edge of the connecting plate and a support ring connecting the upper ends of the second blades; A centrifugal wheel, wherein the space between the first centrifugal wheel and the second centrifugal wheel is divided up and down by a partition wall inclined downward from a top edge of the first centrifugal wheel to a predetermined height of an inner circumferential surface of the second centrifugal wheel; .

The height of the first centrifugal wheel is preferably lower than the height of the second centrifugal wheel.

In addition, the blower of the vehicle air conditioner according to the present invention, the first opening and the outside air inlet opening is formed on both sides of the first switching door is adjusted according to the turning of the first switching door and the opening degree is adjusted by the second switching door on one side of the lower end An intake duct in which a second bent inlet is formed; A scroll case installed below the intake duct and having an air outlet formed at one side thereof and having an upper air inlet and a lower air inlet; A first centrifugal wheel rotatably disposed in an inner center of the scroll case and having a plurality of first blades arranged downwardly along a hub and an edge of the hub, the first centrifugal wheel communicating with a lower air inlet of the scroll case; 1 has a connection plate extending radially from the bottom of the centrifugal wheel, a plurality of second blades arranged upward along the edge of the connection plate and a support ring for connecting the upper ends of the second blades and the inside of the scroll case A double blower fan having a second centrifugal wheel communicating with the upper air inlet; A blower motor for rotating the double blower fan by condensing the shaft with the hub; In addition, the outer case of the scroll case is connected to the intake duct and the scroll case while connecting the inside of the intake duct and the lower air inlet of the scroll case between the inner circumferential surface and the scroll case, and opened by the second switching door. And a guide duct forming a first guide passage through which the first guide passage is controlled, and further, a third bent inlet through which the opening degree is adjusted by a third conversion door is further provided at the other end of the lower portion of the intake duct, and the intake is guided by the guide duct. A second guide passage through which the inside and the first guide passage of the duct and the lower air inlet communicate with each other and the opening degree is further controlled by the third switching door is further formed. The first guide passage and the second guide passage are further formed. The first and second blowing control doors that control the opening of the lower air inlet passage turn It is further provided.

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The motor may be installed through the bottom of the scroll case so that its axis is upward and the hub may be condensed on the axis. In addition, in order to increase the blowing efficiency of the first centrifugal wheel, the motor may be supported at the upper center of the scroll case so that its axis is downward and the hub may be adhered to the axis.

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According to the present invention, when the double blower fan rotates, air is sucked into the space between the first centrifugal wheel and the second centrifugal wheel through the upper air inlet of the scroll case, and is blown between the second blades of the second centrifugal wheel to scroll the case. Is discharged through the air discharge port. In addition, air is sucked into the first centrifugal wheel through the lower air inlet via the guide duct, and then air is blown between the first blades of the first centrifugal wheel to the space between the first centrifugal wheel and the second centrifugal wheel. This air is again blown between the second blades of the second centrifugal wheel and discharged through the air discharge port of the scroll case. Therefore, the air is compressed in two stages by the first centrifugal wheel and the second centrifugal wheel and blown to increase the wind pressure and increase the amount of air.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

1A is a cross-sectional view of a dual blower fan according to the present invention. The double blower fan 10 of the present invention has a first centrifugal wheel 20 and a second centrifugal wheel 30 which are integrally formed, and the second centrifugal wheel has a predetermined distance from the outer circumference of the first centrifugal wheel 20. 30) is formed in a surrounding form. That is, the dual blower fan 10 according to the present invention is formed along the edge of the hub 22 and the hub 22 formed to be adhered to the shaft 42 of the blower motor 40 (see FIG. 2). A first centrifugal wheel 20 having a plurality of first blades 24 arranged in a plurality; a connecting plate 32 extending radially from a lower end of the first centrifugal wheel 20, and the connecting plate 32. And a second centrifugal wheel 30 having a plurality of second blades 34 arranged upward along the edge of the support blades and a support ring 36 connecting the upper ends of the second blades 34.

According to the dual blower fan 10 of the present invention, when the blower motor 40 rotates, the air of the upper portion of the double blower fan 10 is driven by the suction force of the first centrifugal wheel 20 and the second centrifugal wheel 30. Inflows into the space therebetween may be blown through the second blades 34 in the radial direction of the second centrifugal wheel 30. In addition, the air of the lower portion of the double blower fan 10 is introduced into the first centrifugal wheel 20 by suction force and blown through the first blades 24 in the radial direction of the first centrifugal wheel 20. As a result, the air is introduced into the space between the first centrifugal wheel 20 and the second centrifugal wheel 30, and the air is blown through the second blades 34 in the radial direction of the second centrifugal wheel 30. . Therefore, since the blower air is compressed and blown in two stages, the wind pressure can be increased as well as the amount of air can be increased.

According to the dual blower fan 10 of the present invention, the angles of the first blades 24 and the second blades 34 may have an inlet flow field of the first blade 24 and an outlet flow field of the second blades 34. It is preferably arranged to match. In addition, the height of the first centrifugal wheel 20 is preferably lower than the height of the second centrifugal wheel 30.

Further, according to the present invention, the space between the first centrifugal wheel 20 and the second centrifugal wheel 30 as shown in Figure 1b is the second centrifugal wheel (from the upper edge of the first centrifugal wheel 20) It may be partitioned up and down by the partition wall 12 inclined downward to a predetermined height of the inner peripheral surface of 30. As such, when the space between the first centrifugal wheel 20 and the second centrifugal wheel 30 is partitioned, the space is flowed in from the lower portion of the scroll case 50 (see FIG. 2), so that the first centrifugal wheel 20 and the second centrifugal wheel are separated. The air flowed into the upper space between the first centrifugal wheel 20 and the second centrifugal wheel 30 from the upper part of the scroll case 50 and the air compressed and blown while passing through the partition 30 are partition walls. Since it does not collide by (12), it is possible to further increase the blowing efficiency.

Next, preferred embodiments of the blower of the vehicle air conditioner to which the double blower fan 10 configured as described above is applied will be described.

<Example 1>

The blower which concerns on Example 1 of this invention is demonstrated, referring FIG. 2 and FIG.

The blower of this embodiment is an intake duct 60 for introducing internal and external air, and a scroll case 50 installed below the intake duct 60 and having an upper air inlet 52 and a lower air inlet 54. And, while surrounding the outside of the scroll case 50, the dual blowing fan 10 rotatably disposed in the scroll case 50, the motor 40 for rotating the dual blowing fan 10, and the scroll case 50 And a guide duct 70 connected to the intake duct 60 and the scroll case 50.

On both sides of the intake duct 60, first inlet 61 for introducing air in the vehicle interior and outside air inlets 62 for introducing outside air are formed in this order. The opening degree of the first inlet 61 and the outside air inlet 62 is adjusted according to the turning of the first conversion door 63 hinged to the upper end of the intake duct 60. That is, when the first switching door 63 is turned to block the first inlet 61, outside air may be introduced into the intake duct 60 through the outside air inlet 62, and the first switching door 63 may be introduced into the intake duct 60. When turning to block the outer inlet, the bet may be introduced into the intake duct 60 through the first inlet 61. In addition, a second bent inlet 64 is provided at one side of the lower end of the intake duct 60, and the opening of the second bent inlet 64 is controlled by the second switching door 65. Therefore, when the second slot inlet 64 is opened, the bet may be introduced into the intake duct 60 through the second slot inlet 64.

The scroll case 50 installed below the intake duct 60 has an air discharge port 56 formed to discharge air on one side thereof, and an upper air inlet port for introducing air to the top and bottom surfaces of the scroll case 50. 52 and the lower air inlet 54 are formed in this order.

According to the present exemplary embodiment, the guide duct 70 is connected to the intake duct 60 and the scroll case 50 while surrounding the outside of the scroll case 50 so that the guide duct 70 is connected between the inner circumferential surface and the scroll case 50. A first guide passageway 72 is formed which communicates the inside of the head 60 with the lower air inlet 54 of the scroll case 50. The opening of the first guide passage 72 is controlled by the second switching door 65 which adjusts the opening degree of the second bend inlet 64.

Therefore, when the second switching door 65 is blocking the second inlet inlet 64, the inside or outside air flowing into the intake duct 60 through the first inlet 61 or the outside air inlet 62 is upper While flowing into the scroll case 50 through the air inlet 52, it may be introduced into the scroll case 50 through the lower air inlet 54 through the first guide passage 72. In addition, when the second switching door 65 is blocking the inlet of the first guide passage 72, the inside or outside air introduced into the intake duct 60 through the first inlet 61 or the outside air inlet 62 The bet introduced into the scroll case 50 through the upper air inlet 52 and introduced through the opened second bevel inlet 64 is scrolled through the lower air inlet 54 through the first guide passage 72. It may be introduced into the case 50.

As described above, in order to allow the air flowing into the scroll case 50 to be blown at a high air volume through various paths, the above-described double blower fan 10 is provided in the scroll case 50 to the motor 40. It is rotatably installed by).

That is, in this embodiment, the motor 40 is installed through the bottom surface of the scroll case 50 so that its axis is upward (that is, through the lower air inlet 54, for example, a conventional support rib or the like). And the hub 22 of the double blower fan 10 is condensed to the shaft 42 protruding above the motor 40. The double blower fan 10 may be rotated according to the rotation of the fan.                     

Therefore, when the double blower fan 10 rotates, the air sucked into the intake duct 60 according to the air inlet mode is introduced into the first centrifugal wheel 20 through the upper air inlet 52 of the scroll case 50. And it is sucked into the space between the second centrifugal wheel 30 and blown between the second blades 34 of the second centrifugal wheel 30 may be discharged through the air discharge port 56 of the scroll case (50). In addition, according to the air inlet mode, the air passing through the first guide passage 72 is sucked into the first centrifugal wheel 20 through the lower air inlet 54, and then the air of the first centrifugal wheel 20 Air is blown between the first blades 24 and discharged into the space between the first centrifugal wheel 20 and the second centrifugal wheel 30. This air is again blown between the second blades 34 of the second centrifugal wheel 30 may be discharged through the air discharge port 56 of the scroll case 50. Therefore, in the blower of the present embodiment, the air is compressed in two stages by the first centrifugal wheel 20 and the second centrifugal wheel 30 and blown to increase the wind pressure and increase the amount of air.

<Example 2>

In the blower of the second embodiment shown in FIGS. 4 and 5, unlike the first embodiment, the motor 40 scrolls the shaft 42 downward to increase the blowing efficiency of the first centrifugal wheel 20. The hub 22 of the double blower fan 10 is supported by the upper center of the case 50, and the shaft 42 facing downwards. In this case, the first switching door 63 has a notch 63a formed at the lower end of the first switching door 63 so as not to interfere with the motor 40 when turning. When closing by the switching door 63, it is preferable that protrusions 61a and 62a which can block the notch 63a are sequentially formed. The rest of the configuration is the same as that of the first embodiment.

According to the blower of the present embodiment, the amount of air flowing into the first centrifugal wheel 20 through the lower air inlet 54 along the first guide passage 72 increases and the increased air is increased in the first centrifugal wheel 20. ) And the second centrifugal wheel 30 is compressed in two stages and blown to further increase the blowing efficiency.

<Example 3>

6 shows a blower according to Embodiment 3 of the present invention.

In the blower of the present embodiment, in the first embodiment, the guide duct 70 allows the inside of the intake duct 60 and the first guide passage 72 and the second air inlet 54 to communicate with each other. A passage 74 is further formed. In addition, a third bent inlet 66 communicating with the second guide passage 74 is further provided at the other end of the lower end of the intake duct 60 (that is, the opposite side to the side on which the second bent inlet 64 is formed). The opening degree of the second guide passage 74 and the third bent inlet 66 is controlled by the third switching door 67 provided at their boundary. In the first guide passage 72 and the second guide passage 74, the first air blowing control door 76 and the second air adjusting door 78 for adjusting the opening degree of the passage toward the lower air inlet 54 are in turn. Is installed more.

Therefore, not only the air may be blown in various modes according to the opening and closing of the internal / external air inlets 61, 62, 64, 66, but also by the first air blowing control door 76 and the second air blowing control door 78. The amount of air flowing into the first centrifugal wheel 20 and blown can be appropriately adjusted according to the opening degree of the first guide passage 72 and the second guide passage 74. In addition, since air may be uniformly introduced and blown into the first guide passage 72 and the second guide passage 74, the wind pressure and the air volume may be compensated evenly.

<Example 4>

7 shows a blower according to Embodiment 4 of the present invention. The blower of this embodiment is the upper part of the scroll case 50 so that the shaft 42 of the motor 40 is downward to increase the blowing efficiency of the first centrifugal wheel 20 as in the second embodiment in the third embodiment. The rest of the configuration is the same as that of the third embodiment except that the hub 22 of the double blower fan 10 is supported by the center and the shaft 42 facing downward.

In the double blower fan of the present invention configured as described above and the blower of the vehicle air conditioner having the same, the air pressure is compressed by blowing in two stages by the first centrifugal wheel 20 and the second centrifugal wheel 30, so that the air pressure is reduced. In addition to the increase in the air volume, thereby increasing the heating and cooling performance of the vehicle air conditioning apparatus.

In addition, since the blowing efficiency is higher than that of the same size blower, the air conditioner can be made compact.

In addition, the amount of air introduced into the first centrifugal wheel 20 by the first blowing control door 76 and the second blowing control door 78 can be adjusted appropriately so that the blowing conditions can be properly adjusted according to the heating and cooling load. have.

Claims (6)

A first centrifugal wheel having a hub formed to be adhered to an axis of the blower motor and a plurality of first blades arranged downward along an edge of the hub; A second centrifugal plate having a connecting plate extending radially from a lower end of the first centrifugal wheel, a plurality of second blades arranged upward along an edge of the connecting plate, and a support ring connecting the upper ends of the second blades; Including a wheel, The space between the first centrifugal wheel and the second centrifugal wheel is partitioned into an upper space and a lower space by a partition wall inclined downward from a top edge of the first centrifugal wheel to a predetermined height of an inner circumferential surface of the second centrifugal wheel. Dual blower fan characterized by. The method of claim 1, And a height of the first centrifugal wheel is lower than a height of the second centrifugal wheel. delete An intake duct formed on both upper sides of the first inlet duct and the outside air inlet of which the opening degree is adjusted according to the turning of the first switching door, and the second inlet duct of which the opening degree is controlled by the second switching door on one side of the lower end; A scroll case installed below the intake duct and having an air discharge port formed at one side thereof, and having an upper air inlet and a lower air inlet formed on the upper and lower surfaces thereof; A first centrifugal wheel rotatably disposed in an inner center of the scroll case and having a plurality of hubs and first blades arranged downward along the edge of the hub, the first centrifugal wheels communicating with a lower air inlet of the scroll case; A connection plate extending radially from the bottom of the first centrifugal wheel, a plurality of second blades arranged upwardly along an edge of the connection plate, and a support ring for connecting the upper ends of the second blades with an inner scroll case A double blower fan having a second centrifugal wheel communicating with an upper air inlet of the air blower; A blower motor installed to be fixed to the hub to rotate the double blower fan; In addition, the outer case of the scroll case is connected to the intake duct and the scroll case while connecting the inside of the intake duct and the lower air inlet of the scroll case between the inner circumferential surface and the scroll case, and opened by the second switching door. It includes a guide duct to form a first guide passage is adjusted, The lower end of the intake duct is further provided with a third slot inlet opening is adjusted by the third conversion door, the guide duct communicates the inside of the first guide passage and the intake duct and the lower air inlet and A second guide passage is further formed to control the opening degree by the third switching door, and the first and second air blowing control doors to adjust the opening degree of the lower air inlet side passage in the first guide passage and the second guide passage Blower of the automotive air conditioner with a double blower fan, characterized in that the door is further installed in turn. The method of claim 4, wherein The motor is blower of the vehicle air conditioner having a double blower fan, characterized in that the shaft is installed through the bottom of the scroll case so that the shaft is upward. delete

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