KR20080059947A - A car rear air conditioning device - Google Patents

Abstract

A rear air conditioner for a vehicle is provided to prevent noise by installing at least one vortex preventive rib at the biggest gap between a blowing chamber case unit and a side wall of the vehicle. A rear air conditioner for a vehicle comprises an air conditioner case, a centrifugal fan(15c), an air inlet(11c), and an inlet ring(11d). At least one vortex preventive rib(20) is protruded from an outer surface of the inlet ring. The vortex preventive rib has predetermined length in the radius direction of the air inlet and has predetermined height to a side wall(2) of a vehicle body.

Description

Rear air conditioning device for vehicles {A car rear air conditioning device}

1 is a perspective view showing a state in which the rear air conditioner is installed on the vehicle body side wall 2 on the rear wheel cover.

2 is a cross-sectional view showing the internal configuration of the rear air conditioner shown in FIG.

3 is a cross-sectional view of the leader line “A-A” in FIG. 1.

4 is a cross-sectional view to which the configuration of the present invention is applied, and a leader line "A-A" side view of FIG.

5 is a front view of the ventilation chamber case part seen from the side wall of the vehicle body in the case where one vortex prevention rib according to the present invention is formed;

6 is a front view of the ventilation chamber case part viewed from the side wall of the vehicle body in the case where the vortex prevention ribs cross each other in a cross shape.

7 is a view showing the results of computer simulation according to the prior art.

8 is a view showing the results of computer simulation according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: rear wheel cover

2: body sidewall

11: blower room

11c: air inlet

11d: inlet ring

14e: Ventilation Case

15c: centrifugal fan

20: vortex prevention rib

The present invention relates to a vehicle rear air conditioner, and more particularly, to form a vehicle body side wall inclined up and down, and to maintain the design method to make a beautiful appearance by curving, while suppressing the generation of vortices when inflow of air to generate noise. It relates to a vehicle rear air conditioner that can prevent the phenomenon.

A general vehicle air conditioner is configured to include a cooling system for cooling the interior of a vehicle and a heating system for heating the interior of the vehicle. The cooling system compresses the refrigerant by a compressor driven by the engine and sends the refrigerant to the condenser, condenses the refrigerant by forced blowing of the cooling fan in the condenser, and then transfers the refrigerant to a receiver dryer, an expansion valve, and an evaporator. In the process of returning back to the compressor in turn, the air blown by the blower unit installed at the inlet end of the air conditioning case and the refrigerant passing through the evaporator are heat-exchanged. By discharging, the vehicle interior is cooled.

On the other hand, the heating system heat-exchanges the air blown by the blower fan of the blower unit and the cooling water passing through the heater core in the process of returning the cooling water of the engine to the engine via the heater core, and the air blows to become warm. By discharging air into the vehicle interior, the vehicle interior is heated.

However, the general vehicle air conditioner is configured so that air for cooling or heating is discharged from a discharge port formed in an instrument panel in front of a vehicle interior. Thus, a vehicle having a large indoor space, for example, a luxury car or a van or RV (Recreation) In the case of a vehicle having a large indoor space such as a vehicle, the cooling or heating effect is insufficient until the rear seat (rear seat).

Therefore, in the case of a vehicle having a large indoor space as described above, in order to assist cooling and heating performance for the rear seat, as shown in FIGS. 1 and 3, the vehicle body side wall 2 on the rear wheel cover 1 is generally used. The rear air conditioning apparatus 10 is provided in the inner panel 3 which is a limited space of the.

As described above, the rear air conditioner 10 includes a blower chamber 11 at the inlet end, and blows air from the blower chamber 11 to the roof side of the vehicle at the outlet end. Vent outlet 12 and floor outlet 13 for blowing air to the floor side of the vehicle, and the vent outlet 12 and the floor outlet 13 from the blower chamber 11. A case 14 for forming an air flow path leading to), a blower unit 15 for forcibly inhaling air into the blower chamber 11, and for cooling or heating the air introduced from the blower unit 15. Evaporator 16 and heater core 17 are provided.

Here, the evaporator 16 is installed to cover the whole of the air flow path, the heater core 17 is installed on one side of the downstream side, between the evaporator 16 and the heater core 17 The temporal door 18 for controlling temperature by allowing the air passing through the evaporator 16 to selectively pass through the heater core 17 is rotatably installed.

In addition, between the vent outlet 12 and the floor outlet 13, a blower mode door 19 is rotatably installed, and the air blown by the blower unit 15 is blown by the blower mode door 19. Depending on the degree of opening, it may be selected to be discharged to the roof side of the vehicle through the vent outlet 12, to the floor side through the floor outlet 13, or both.

3 is a cross-sectional view showing the "A-A" part of the leader line of FIG. 1, and shows the coupling relationship between the blower unit 15 and the air conditioning case 14 which forms the ventilation chamber 11. As shown in FIG.

The air conditioning case 14 is the first air conditioning case 14a and the second air conditioning case 14b are combined to form one air conditioning case (refer to FIG. 1). The first air conditioning case 14a includes a ventilation chamber ( A first blowing chamber 11a, which is half of the space 11, is formed, and the first air chamber 11c has a circular air inlet 11c in the axial direction of the centrifugal fan 15c, which will be described later, on one side facing the vehicle side wall 2. The ventilation chamber case part 14c is formed.

On the other hand, in the second air conditioning case 14b, the second air blowing chamber 11b, which is the other half space of the air blowing chamber 11, is formed and the motor 15a constituting the blower unit 15 is inserted and installed. The second ventilation chamber case part 14d provided with the motor mounting hole 11d is formed.

Here, when the first and second blower case parts 14c and 14d are combined with each other, a single blower case part 14e is formed.

In the blower chamber 11, a centrifugal fan 15c provided in the motor shaft 15b of the motor 15a constituting the blower unit 15 is built-in. As shown in FIG. 3, the vehicle body 2 And forced air in the axial direction through the air inlet 11c in the direction of the arrow into the space between the first blower chamber part 14c forming the first blower chamber 11a, and then the centrifugal fan 15c. After passing through the air flow path between the blades arranged in the circumferential direction of the to be discharged to the evaporator 16 side along the air flow path in the air conditioning case (14).

Here, in order to prevent the reverse current of the intake air introduced through the air inlet 11c, an annular inlet ring 11d is connected to the first blowing chamber case 14c toward the first blowing chamber 11a. It is bent in the transverse direction.

That is, the inlet ring 11d includes air flowing between the vehicle body side wall 2 and the first blowing chamber case 14c through the air inlet 11c, and the first and second blowing chambers 11a and 11b. The air flows into the air blowing chamber 11 and guides the air flowing into the air blowing chamber 11 through the air inlet 11c, and the first air blowing chamber case 14c. Do not backflow between them.

However, according to the rear air conditioner according to the related art, as shown in FIG. 3, when the inflow amount of air introduced into the air inlet 11c is viewed from the front of the first blowing chamber case 14c, a difference occurs. do.

The reason is that the vehicle body side wall 2 is inclined with respect to the front surface of the first ventilation chamber case 14c, and as shown in Fig. 3, the front surface and the vehicle body 2 of the first ventilation chamber case 14c are inclined. The space | interval narrow part S1 and the space | interval wide part S2 exist. Therefore, since there is a narrow and narrow portion of the gap as described above, the amount of air flowing into the air inlet 11c through the narrow space (S1) and the air inlet 11c through the wide space (S2) The difference in the amount of air is generated.

As a result, due to the difference in the flow pressure and speed of the air introduced through the narrow space (S1) of the air flowing into the air inlet (11c) and the air introduced through the wide space (S2), Air vortex phenomenon occurs in the air inlet (11c) side, due to this, there was a problem that a low-frequency noise of a certain Hz due to the vortex characteristics.

Accordingly, the present inventors computer simulation as the noise is generated as described above, as shown in Figure 7, it was found that the air is introduced in the eccentric position in the center of the air inlet (11c) causing the vortex, It was recognized that the vortex phenomena of the air caused the noise generation.

On the other hand, in order to create a constant condition without biasing the air inflows from all directions to the air inlet (11c) to one side, the body side wall (2) can be designed to be in a straight line without designing inclined, but in this way, As the exterior of the vehicle is not beautiful, the customer's preference is lowered. In consideration of this, the side wall 2 of the vehicle body is inclined up and down, and the curve is processed to meet the current trend of designing the vehicle design, and other noises are taken. I'm trying to solve the problem.

The present invention has been created to solve the above problems, while forming the vehicle side wall inclined up and down, while maintaining the design method to make the exterior beautiful by curving the noise while suppressing the vortex generation during the inflow of air to generate noise An object of the present invention is to provide a rear air conditioning apparatus capable of preventing a phenomenon.

The present invention for achieving the above object, and the air-conditioning case is installed so that the ventilation chamber case portion for forming a blowing chamber for blowing air to the outside in a position corresponding to the inside of the side wall body inclined at a predetermined angle on the rear wheel cover and ; A centrifugal fan rotatably installed in the blowing chamber to discharge air sucked in the axial direction in the circumferential direction; An air inlet formed in the blower case part so that air is introduced between the blower case part and the vehicle body sidewall in an axial direction of the centrifugal fan; In the rear air conditioner comprising an inlet ring bent to the air inlet side on the air inlet side, the outer surface of the inlet ring has a vortex prevention rib having a predetermined length in the radial direction of the air inlet and a predetermined height in the side wall direction of the vehicle body At least one protrusion is characterized in that formed.

Hereinafter, a preferred embodiment of a rear air conditioner according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is specified that the present invention refers to the same member number for a configuration overlapping with the prior art.

4 is a cross-sectional view to which the configuration of the present invention is applied, and is a cross-sectional view of the "AA" side of FIG. 1, and FIG. 5 is a front view of the ventilation chamber case part viewed from the side wall of the vehicle body when one vortex prevention rib is formed according to the present invention. 6 is a front view of the ventilation chamber case part viewed from the side wall of the vehicle body in the case where the vortex prevention ribs according to the present invention are crosswise formed, and FIG. 8 is a diagram showing the results of computer simulation according to the present invention.

As shown in FIG. 4, an air blowing chamber for forming an air blowing chamber 11 through which outside air is introduced and blown to a position corresponding to an inside of a vehicle side wall 2 inclined at a predetermined angle on the rear wheel cover 1 is provided. An air conditioning case 14 installed so that the case portion 14e is positioned; A centrifugal fan (15c) rotatably installed in the blowing chamber (11) for discharging air sucked in the axial direction in the circumferential direction; The air blower case 14e corresponding to the vehicle body side wall 2 is formed such that air is introduced between the air blower case 14e and the vehicle body side wall 2 in the axial direction of the centrifugal fan 15c. An air inlet 11c; In the rear air conditioner comprising an inlet ring (11d) bent to the air blowing chamber 11 side on the air inlet (11c) side, the outer surface of the inlet ring (11d) in the radial direction of the air inlet (11c) At least one or more vortex preventing ribs 20 having a predetermined length and a predetermined height in the vehicle body side wall 2 are formed.

That is, the vortex preventing rib 20 is configured such that the air flowing through the blower chamber portion 14e and the vehicle body side wall 2 is converted into a vortex flow immediately in front of the inlet ring 11d of the air inlet 11c. Act as a preventive measure.

In other words, since the vehicle body side wall 2 is inclined with respect to the front surface of the first ventilation chamber case 14c, as shown in FIG. 4, the front surface and the vehicle body 2 of the first ventilation chamber case 14c are inclined. The space | interval narrow part S1 and the space | interval wide part S2 exist.

Therefore, since there is a narrow and narrow portion of the gap as described above, the amount of air flowing into the air inlet 11c through the narrow space (S1) and the air inlet 11c through the wide space (S2) The difference in the amount of air is generated.

As a result, due to the difference in the flow pressure and speed of the air introduced through the narrow space (S1) of the air flowing into the air inlet (11c) and the air introduced through the wide space (S2), The vortex phenomenon occurs in the air at the air inlet 11c side, the vortex generation phenomenon is prevented by the vortex prevention rib 20 according to the present invention. This suppresses the generation of vortices so that low-frequency noise of a certain Hz is not generated.

이상이며, 상기 와류 방지 리브(20)의 차체 측벽(2) 방향으로의 높이(H)는 적어도 상기 인렛링(11d)의 높이(IH) 의

이상이 되도록 형성하는 것이 와류 발생 현상을 억제하는 것에 가장 바람직하다.On the other hand, the length L in the radial direction of the vortex prevention rib 20 according to the present invention is at least the diameter ID of the air inlet 11c.

The height H in the vehicle body side wall 2 direction of the vortex preventing rib 20 is at least the height IH of the inlet ring 11d.

It is most preferable to form so that it may become an abnormality, and to suppress a vortex generation phenomenon.

As shown in FIG. 5, the vortex preventing rib 20 according to the present invention is spaced apart from the ventilation chamber case 14e and the vehicle body side wall 2 corresponding to the outer surface of the inlet ring 11d. One of the intervals can be formed on the outer surface corresponding to the portion (S2) with the largest separation interval.

As shown in FIG. 6, the vortex preventing rib 20 may be formed to intersect, for example, in a “+” shape. When the vortex prevention ribs 20 are formed to intersect in this way, the air flows through the narrow space S1 and the wide space S2 between the front surface of the first ventilation chamber case 14c and the vehicle body 2. Even if the inflow amount of is changed, it is possible to suppress the vortex generation phenomenon in the vicinity of the air inlet 11c.

That is, the Applicant has conducted computer simulations of the present invention, and as shown in FIG. 8, it can be seen that air flows into the center of the air inlet without vortex generation.

Accordingly, the present invention can prevent the occurrence of noise by suppressing the generation of vortex when the air inlet while maintaining the existing side wall formed inclined without any design change.

As described above, it is possible to prevent the occurrence of noise by suppressing the generation of vortices when the air inlet while maintaining the design method to form the side wall of the vehicle body to be inclined up and down as well as the beautiful appearance by the curved process.

Claims (4)

The air-conditioning case installed so that the ventilation chamber case part 14e for forming the ventilation chamber 11 which blows in and blows outside air in the position corresponding to the inside of the side wall 2 of the vehicle body inclined at a predetermined angle on the rear wheel cover 1 is located. 14; A centrifugal fan (15c) rotatably installed in the blowing chamber (11) for discharging air sucked in the axial direction in the circumferential direction; An air inlet (11c) formed in the blower case part (14e) so that air is introduced between the blower case part (14e) and the vehicle body side wall (2) in the axial direction of the centrifugal fan (15c); In the vehicle rear air conditioner comprising an inlet ring (11d) bent to the air blowing chamber 11 side on the air inlet (11c) side, At least one vortex preventing rib 20 having a predetermined length in the radial direction of the air inlet 11c and a predetermined height in the direction of the vehicle body side wall 2 is formed on the outer surface of the inlet ring 11d. Vehicle rear air conditioning system. The method of claim 1, The vortex preventing rib 20 corresponds to a portion of the outer surface of the inlet ring 11d that has the largest separation interval among the spaced intervals between the ventilation chamber case 14e and the vehicle body side wall 2 corresponding thereto. Vehicle air conditioning apparatus, characterized in that formed on the outer surface. The method of claim 1, The length L in the radial direction of the vortex preventing rib 20 is at least the diameter ID of the air inlet 11c.

The height H in the vehicle body side wall 2 direction of the vortex preventing rib 20 is at least the height IH of the inlet ring 11d.

The rear air conditioner characterized by the above. The method according to claim 1 or 2, The vortex preventing rib 20 is characterized in that the vehicle is configured to cross.

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