KR100694614B1 - blowing device in air conditioner for a vehicle - Google Patents

Abstract

The present invention relates to a blower of a vehicle air conditioner.

SUMMARY OF THE INVENTION An object of the present invention is to provide a blower for a vehicle air conditioner which prevents fluid leakage into a gap by causing the fluid in each flow path of the scroll case to be diverted to a place other than the gap.

To this end, the present invention, the upper air inlet and the second internal air inlet opening is selectively formed by the first internal / external air switching door member on the upper side, the lower is selected by the second internal / external air switching door member An air conditioning case in which a first bet inlet opening is formed; A scroll casing installed in communication with the air conditioning case and partitioned into first and second air passages by a partition wall; In the blower unit of the vehicle air conditioner, which is rotatably installed in the first and second air passages, and has a two-layer blower fan having a gap between the partition walls.

The end of the partition 43 side of the blowing fan body 51 is bent upward, so that the air in the first air passage 41 is guided in a direction other than the gap c by the upward bent portion 52. It features.

Vehicle, automobile, air conditioner, blower, air conditioning case, scroll casing, blowing fan, bulkhead, gap

Description

Blowing device in air conditioner for a vehicle

1 is a configuration diagram of a blowing unit applied to an air conditioner of a conventional vehicle

Figure 2 is a first embodiment of a blowing unit applied to the air conditioner of the vehicle according to the present invention

3 is a detailed view of portion A of FIG.

Figure 4 is a second embodiment of the blowing unit applied to the air conditioner of the vehicle according to the present invention

5 is a third embodiment of a blowing unit applied to an air conditioner of a vehicle according to the present invention.

Explanation of symbols for the main parts of the drawings

40: scroll casing 41: first air flow path

42: second air passage 43: partition wall

44: bending portion 50: blowing fan

51: blowing fan body 52: bent portion

53: slope 60: first blowing fan

70 second blower fan 80 fluid guide member                 

c: gap

θ: angle between the upper surface of the centrifugal fan body and the bent portion

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and more particularly, to a blower for a vehicle air conditioner that prevents air from leaking into a gap through a structural improvement capable of switching the flow direction of air to a place other than the gap.

In general, a vehicle air conditioner is a refrigerant that is compressed by a compressor driven by the power of the engine flows into the condenser, heat exchanged by the forced air of the cooling fan to condense, and then through the receiver dryer, expansion valve and evaporator to the compressor again. In the process of inflow, the air blown by the blower fan of the blower unit exchanges with the refrigerant passing through the evaporator and enters the room in a cold state, thereby cooling the vehicle interior and returning the engine coolant to the engine through the heater core. The air blown by the blowing fan in the heat exchange with the cooling water passing through the heater core is introduced into the room in a warm state by the device comprising a heating device for heating the interior of the vehicle.

In such an air conditioner, the evaporator and the heater core are installed in the internal flow path of the air conditioner case, the blower unit is installed at the inlet end of the air conditioner case in front of the evaporator, and the cold air or hot air at the outlet end of the air conditioner case behind the heater core. Face vents for cooling and cooling the room by discharging them to the window of the vehicle and floor vents for cooling and cooling the room by discharging air or warm air to the lower half of the vehicle interior are installed in turn, and the vents are opened and closed according to a predetermined cooling and heating mode. Doors for adjustment are also installed in sequence.

In such an air conditioner, internal air inlets and external air inlets are formed at both upper ends of the blower case of the blower unit, and the internal / external air inlets are selectively opened and closed by internal / external air switching doors.

Therefore, when only the outside air is supplied to the room through the outside air inlet during operation of the air conditioner, the load of the compressor is large, and the fuel loss is large, and when only the inside of the vehicle is circulated through the inside air inlet, the air inside the vehicle is contaminated to improve the health of the occupants. In addition, when the winter defroster mode is selected, there is a problem that frost is generated on the windshield by increasing the humidity of the bet.

In order to solve these problems, air conditioners have been proposed that can be supplied to the interior of the vehicle by separating or mixing the inside and outside air, and are representative of such air conditioners, Japanese Patent Application Laid-Open No. 10-119533, East 9-240248, East Air conditioners disclosed in US Pat. No. 9-156348, and the like. These air conditioners divide the flow paths of the scroll case and the air conditioning case up and down by partition walls so as to blow air in a two-layer flow structure by installing a blower fan in the upper space and the lower space of the scroll case. .

FIG. 1 is a conventional drawing showing an example of a blower unit capable of two-layer flow, which is referred to another prior art Japanese Patent Application Laid-Open No. 11-105532 (name: vehicle air conditioner).

According to the drawing, the blowing unit 1 is formed so that the outside air inlet 3 and the second inside air inlet 2a, which are selectively opened by the first internal / external air switching door member 5, are opposed to each other. An air conditioning case (11) formed at a lower portion thereof with a first internal air inlet (2) selectively opened by the second internal / external air switching door member (4); A scroll casing 10a installed in communication with the air conditioning case 11 and partitioned into first and second air flow paths 8 and 9 by a partition wall 10; An external air side fan 7 and an internal air side fan 6 which are installed to be positioned in the first and second air flow paths 8 and 9 to forcibly blow the air flowing into each flow path in a set direction; It comprises an electric motor 42 for providing rotational power to the outside fan and the inside fan (7,6).

Reference numeral 12 is an air filter.

From the above configuration, the inner / outer air switching door member 5 is disposed on the upper side of the air conditioner case 1 while the inside fan 6 and the outside fan 7 are rotated by the power of the electric motor 42. According to the opening and closing operation of the outside air or the inlet air is selectively introduced through the outside air inlet (3) or the second bet inlet (2a). The introduced outside air or bet is discharged into the vehicle through the first air flow path 8 and the face vent (or defrost) or the front vent connected thereto by the rotational force of the outside air side fan 7.

On the other hand, the lower side of the air conditioning case (1) according to the opening operation of the second internal / external air switching door member 4 through the first bet inlet 2, the introduced bet is the second air flow path (9) ) And a floor vent connected to it are discharged into the vehicle.                         

In this way, the so-called 2-layer air conditioner has a deterioration in heating performance when only the outside air is introduced into the room in the heating mode (especially when the engine waste heat such as diesel engine is low and the gasoline engine has good efficiency). Less waste heat), when only inside the bet is introduced into the room, frost occurs in the car window due to the increase in the humidity of the room. Has the advantage of solving at the same time.

However, due to the installation relationship between the blower fan (outer fan + fan fan) 30 between the first and second air paths 8 and 9, it is difficult to maintain airtightness, resulting in a problem of mixing air through each channel.

In detail, the first and second air flow paths 8 and 9 are partitioned by the partition walls 10, but the partition walls 10 are stagnant bodies, and the blower fan 30 is a fuselage, thus preventing mutual interference. To avoid this, the boundary must be separated. Therefore, a problem occurs in that air flowing in the first and second air passages 8 and 9 is mixed through the spaced gap c.

Thus, for example, the problem caused by the leakage of the outside air and bet through the gap (c), because the low-temperature outside air flows into the first air passage 8 in the winter season, this low-temperature outside air is the gap (c) Inflow into the first air passage 8 through) decreases the heating efficiency while decreasing the fluid temperature in the heated first air passage 8. That is, this results in a decrease in the heating efficiency of the vehicle.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. The present invention relates to a vehicle air conditioner that prevents fluid leakage into a gap by allowing a fluid in each flow path of a scroll case to be diverted to a place other than the gap. The purpose is to provide a blower.

In the air blower of the vehicle air conditioner of the present invention for achieving the above object, the upper air inlet and the second internal air inlet which is selectively opened by the first internal / external air switching door member is formed to face the lower, The air conditioning case is formed with a first internal air inlet opening that is selectively opened by the second internal / external air switching door member; A scroll casing installed in communication with the air conditioning case and partitioned into first and second air passages by a partition wall; In the blower unit of the vehicle air conditioner, which is rotatably installed in the first and second air passages, and has a two-layer blower fan having a gap between the partition walls.

The partition wall side end of the blower fan body is bent upward, so that the air in the first air flow path is guided in a direction other than the gap by the upward bent portion.

In addition, the blower of the vehicle air conditioner of the present invention is characterized in that the angle between the inclined surface and the bent portion of the blowing fan body is an obtuse angle.

In addition, the blower of the vehicle air conditioner of the present invention is characterized in that the bent portion and the connecting portion of the bent portion and the blowing fan body is curved.

In addition, the blower of the vehicle air conditioner of the present invention is characterized in that the blower fan body side end of the partition wall bent in a mountain shape, the end is positioned on the bottom surface of the blower fan body side bent portion.

In addition, an upper air inlet and a second inner air inlet, which are selectively opened by the first internal / external air switching door member, may be formed to face each other, and a lower part may be selectively opened by the second internal / external air switching door member. 1 air-conditioning case formed with a bet inlet; A scroll casing installed in communication with the air conditioning case and partitioned into first and second air passages by a partition wall; It is installed in the first and second air flow path to be able to rotate to force the air flowing into each flow path in a specified direction, and a vehicle air having a two-layer blower fan having a gap between the partition wall In the blower unit of the conditioner,

The fluid guide member is installed on the partition wall side end of the blowing fan body in a direction opposite to the air direction toward the gap, so that air in the first air flow path is guided in a direction other than the gap.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 2 to 5.

FIG. 2 is a first embodiment of a blowing unit applied to a vehicle air conditioner according to the present invention, and FIG. 3 is a detailed view of portion A of FIG.

According to the drawings, the air blower of the present invention is the inner space of the scroll casing 40 in which the blowing fan 50 is built by the partition 43 and the blowing fan body 51, the first and second air passages 41 and 42. In the blower device is divided into a), the gap (c) is formed between the partition 43 and the blowing fan body (51) to allow the rotation of the blowing fan (50); A bent portion 52 is formed by bending an end portion facing the partition 43 of the blower fan body 51 upwardly in the drawing so that the air in the first air passage 41 is spaced by the bent portion 52. Its main feature is to be guided in a different direction from (c).

Accordingly, the outside air introduced into the inside of the blower fan 50 by the rotational force of the first blower fan 60 located in the first air flow passage 41 is caused by the continuous rotational force of the first blower fan 60. It is discharged in the circumferential direction. At this time, the outside air discharged toward the gap c in the discharged outside air is guided in a direction other than the gap c by the bent portion 52, thereby preventing the outside air from being discharged through the gap c in advance.

That is, since the bent portion 52 is a direction corresponding to the direction of air flowing toward the gap c, air is blocked by the bent portion 52, so that discharge to the gap c can be prevented in advance. do.

The bent portion 52 and the connection portion between the bent portion 52 and the blower body 51 were curved to minimize the resistance when the fluid collides with the boundary portion. This reduces the flow noise of the fluid, so the structure is necessary in terms of noise reduction.

In addition, the angle θ between the inclined surface 53 of the blower fan body 51 and the bent portion 52 forms an obtuse angle of about 90 ° to 180 ° so that the air is formed in the upper portion of the first air passage 41. To be guided smoothly.

If the angle θ is an acute angle, air is stagnated between the blower fan body 51 and the bent portion 52, which causes vortex generation and fluid noise. It is therefore preferable to exclude it.                     

On the other hand, when the angle θ is 180 ° or more, the bent portion 52 is bent downwardly of the blowing fan body 51 to open the gap c. Therefore, fluid leakage can not be prevented it is also preferably excluded.

On the other hand, reference numeral 42 denotes the second air flow path, and 70 denotes the second blowing fan.

Figure 4 shows a second embodiment of the blowing unit according to the present invention.

According to the drawings, a second embodiment of the blowing unit according to the present invention is bent in the form of the end of the blowing fan body 51 side of the partition 43, the end of the blowing fan body side bent portion 52 It is positioned on the base.

In this embodiment, since the bent portion 44 of the partition 43 is positioned after the bent portion 52 of the centrifugal fan body 51, the fluid is continuously guided by the two bent portions 52 and 44. As a result, a more reliable leak prevention effect can be obtained by not providing an opportunity for the fluid to leak into the gap c.

Figure 5 shows a third embodiment of the blower applied to the air conditioner of the vehicle according to the present invention.

According to the drawings, the third embodiment of the blower according to the present invention is to move the fluid guide member 80 in the direction opposite to the air direction toward the gap c on the partition 43 side end of the centrifugal fan body 51. It is installed.

That is, by laying the fluid guide member 80 similarly to the form of the upper end of the centrifugal fan body 51 as shown in the figure, the same effect as in the first embodiment of the present invention as shown in FIG. You can get it.

However, the third embodiment of the present invention may be inferior to the one-piece in terms of workability and cost because the work to couple the fluid guide member 80, but if it can overcome this is a sufficiently applicable technology.

The present invention as described above adds a means for switching the flow direction of air to a place other than the gap, and can prevent the air from leaking through the gap. Accordingly, the effect of improving the heating efficiency can be expected by preventing the air flowing in the divided space of the scroll casing from intermixing with each other.

Claims (5)

The upper air inlet and the second air inlet, which are selectively opened by the first internal / external air switching door member, are formed to face each other, and the first internal air, which is selectively opened by the second internal / external air switching door member, in the lower portion thereof. An air conditioning case having an inlet formed therein; A scroll casing installed in communication with the air conditioning case and partitioned into first and second air passages by a partition wall; In the blower unit of the vehicle air conditioner, which is rotatably installed in the first and second air passages, and has a two-layer blower fan having a gap between the partition walls. The end of the partition 43 side of the blowing fan body 51 is bent upward, so that the air in the first air passage 41 is guided in a direction other than the gap c by the upward bent portion 52. Blower of the vehicle air conditioner characterized in that. The method of claim 1, Blower of the vehicle air conditioner, characterized in that the angle (θ) between the inclined surface (53) of the blowing fan body (51) and the bent portion (52) is an obtuse angle. The method of claim 1, And a bent portion (52) and a connection portion between the bent portion (52) and the blowing fan body (51) is a curved surface of the vehicle air conditioner. The method of claim 1, The air blowing fan body 51 side end portion of the partition 43 is bent in a mountain shape, and its end is positioned on the bottom surface of the air blowing fan body 51 side bent portion 52. Blower of vehicle air conditioner.  The upper air inlet and the second air inlet, which are selectively opened by the first internal / external air switching door member, are formed to face each other, and the first internal air, which is selectively opened by the second internal / external air switching door member, in the lower portion thereof. An air conditioning case having an inlet formed therein; A scroll casing installed in communication with the air conditioning case and partitioned into first and second air passages by a partition wall; In the blower unit of the vehicle air conditioner, which is rotatably installed in the first and second air passages, and has a two-layer blower fan having a gap between the partition walls. The fluid guide member 80 is disposed on the partition 43 side end of the blowing fan body 51 in a direction opposite to the air direction toward the gap c so that air in the first air passage 42 is spaced. Blower of the vehicle air conditioner, characterized in that guided to other directions.

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