JP2004299465A - Surface air conditioning structure of instrument panel for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface air-conditioning structure of an instrument panel for a vehicle which does not apply an uncomfortable feeling to a passenger by blowing out cold breeze. <P>SOLUTION: An air-impermeable skin material 35 and a core material 36 are respectively arranged on the front surface side and the rear surface side, and a foaming material 37 having air permeability is provided between the skin material 35 and the core material 36 for the instrument panel 10. Then, an air-conditioning device is provided in the instrument panel 10 for this surface air-conditioning structure of the instrument panel for a vehicle. In the surface air-conditioning structure, air blowing out ports 22 and 23 comprising opening parts formed on the skin material 35 are provided. Dehumidified cool air w from the air-conditioning device is made to flow into the foaming material 37 of the instrument panel 10 from locations being apart from the air blowing out ports 22 and 23, and is fed along the surface of the instrument panel 10. Then, the cool air w is blown out into the cabin from the air blowing-out ports 22 and 23 for the constitution. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a surface cooling structure of a vehicle instrument panel, and more particularly, to a surface cooling structure of a vehicle instrument panel that blows a cool breeze along the surface after passing through the inside of the instrument panel.
[0002]
[Prior art]
Conventionally, when cooling the interior of a vehicle, strong cold air is first blown from a vent outlet provided in an instrument panel or the like to rapidly cool the interior of the vehicle, and after reaching a predetermined indoor temperature, the fan speed of the air conditioner unit is reduced. The temperature is adjusted so as to reduce the temperature and switch to a weaker cold air (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP 2002-46446 A
[Problems to be solved by the invention]
However, in the surface cooling structure of the instrument panel according to the above-mentioned conventional technology, a so-called spot-like cold air is blown from the vent outlet to the occupant, so that the spot cool air disturbs the hair and the contact lenses are easily dried. there were.
[0005]
Accordingly, an object of the present invention is to provide a surface cooling structure of an instrument panel for a vehicle that does not give a passenger an uncomfortable feeling by blowing a cool breeze.
[0006]
[Means for Solving the Problems]
The surface cooling structure of a vehicle instrument panel according to claim 1, wherein a non-breathable skin and a core material are disposed on the front side and the back side, respectively. In a surface cooling structure of a vehicle instrument panel provided with an air conditioner on an instrument panel provided with a foam material having air permeability therebetween, an air outlet comprising an opening formed in the skin material is provided, After the dehumidified cool air from the inside is introduced into the foam material of the instrument panel from a location away from the air outlet and fed along the surface of the instrument panel, it is blown out into the vehicle interior from the air outlet. It is characterized by having such a configuration.
[0007]
The surface cooling structure of the vehicle instrument panel according to claim 2 is the surface cooling structure of the vehicle instrument panel according to claim 1, wherein the cross-sectional shape of the instrument panel is higher on the front side. The rear side is formed in a low curved shape, and the air outlet is formed in a front portion of the instrument panel.
[0008]
The surface cooling structure for a vehicle instrument panel according to claim 3 is the surface cooling structure for a vehicle instrument panel according to claim 1 or 2, wherein the air blowing is provided on the instrument panel. A vent outlet different from the outlet is provided, and a switching door capable of selectively distributing cold air supplied to the vent outlet and cold air supplied to the air outlet is provided. I do.
[0009]
The surface cooling structure of the vehicle instrument panel according to claim 4 is the surface cooling structure of the vehicle instrument panel according to any one of claims 1 to 3, wherein the surface cooling structure is provided from the air outlet. The cool air is blown out to cool the instrument panel surface through which the cool air flows.
[0010]
【The invention's effect】
According to the surface cooling structure of the instrument panel for a vehicle according to the first aspect, since the cool air flows along the instrument panel inside the foam material constituting the instrument panel, the cool air flowing from the air outlet is a weak wind. At the same time, the surface of the instrument panel can be cooled, and the surface of the instrument panel can be cooled. In addition, since the cold air flows inside the foam material, a temperature difference between the front side and the back side of the skin material usually occurs, and there is a concern that dew condensation may occur on the surface of the skin material. By flowing along the surface of the skin material, a dehumidifying effect is obtained, and no dew condensation occurs on the instrument panel surface.
[0011]
According to the surface cooling structure of the instrument panel for a vehicle according to the second aspect, the instrument panel is formed in a curved shape in which the front side is high and the rear side is low, and the air outlet is formed of the instrument panel. Since it is formed at the front part, the breeze blown out from the air outlet flows along the instrument panel surface toward the occupant without fail.
[0012]
According to the surface cooling structure of the vehicle instrument panel described in the third aspect, since the switching door that can be selectively distributed is provided, it is possible to reliably switch the cool air blowing portion. Therefore, for example, when the room temperature is high, the cool air is first blown out from the vent outlet, and after the temperature reaches a predetermined temperature, the outlet portion is switched to the air outlet. A small breeze can be blown out, and the air conditioning procedure in the vehicle cabin can be performed in two stages, and the vehicle cabin can be air-conditioned efficiently.
[0013]
According to the surface cooling structure of the vehicle instrument panel described in claim 4, since the instrument panel surface is cooled by the cool air that has passed through the inside of the foam material of the instrument panel, strong cold air is directly applied to the occupant. The temperature in the vehicle compartment can be adjusted indirectly without spraying.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0015]
As shown in FIG. 1, an instrument panel 10 according to the present embodiment is provided with a center vent 11 at the center in the vehicle width direction, and side vents 12 and 13 and side differential grills 14 and 15 at both left and right ends. The center vent 11, the side vents 12, 13 and the side differential grills 14, 15 are vent outlets provided with grills. The right side of the instrument panel 10 is the driver's seat side, and the left side is the passenger's seat side. A display panel 16 for various meters is provided on the driver's seat side, and an airbag lid 17 and a glove box 18 are provided on the passenger's seat side. Inside the instrument panel 10 between the air bag grid 17 and the glove box 18 and between the center vent 11 and the display panel 16, surface cooling air ducts 19 and 20 to be described later are arranged. Further, in front of the instrument panel 10, air outlets 22 and 23 for surface cooling are provided along the vehicle width direction, and a front differential grill 24 is provided in front of these air outlets 22 and 23. Is provided.
[0016]
FIG. 2 is a cross-sectional view taken along line AA of FIG. An air conditioner unit 25 is provided inside (lower side) of the instrument panel 10. The air conditioner unit 25 communicates with the front differential grill 24 via a differential duct 26, communicates with the center vent 11 via a vent duct 27, and activates the air conditioner unit 25 as indicated by an arrow in FIG. Then, the dehumidified cool air w is sent from the air conditioner unit 25, and the spot-like cool air W1 is blown out from the side vents 12, 13 and the center vent 11. The vent duct 27 is connected to the surface cooling air ducts 19 and 20 shown in FIG. 1, and the cool breeze w2 flowing from the surface cooling air ducts 19 and 20 into the foam of the instrument panel 10 is air-cooled. The air outlet 22 is configured to be blown into the vehicle interior. An electronic device 28 such as an audio device is vertically disposed below the center vent 11, and a vehicle body panel 44 is disposed below the air conditioner unit 25. Reference numeral 45 denotes a windshield extending obliquely rearward and upward.
[0017]
As shown in FIG. 3, an airbag device 31 is supported via a bracket 30 on a cross car beam 29 extending in the vehicle width direction inside the instrument panel 10 on the passenger seat side. An air duct 19 for surface cooling extends obliquely rearward of the airbag device 31 on the rear side of the instrument panel 10 along the vehicle width direction. The surface cooling air duct 19 is connected to the air conditioner unit 25 via a vent duct 27, and a blower unit 32 is disposed beside the air conditioner unit 25 as shown in FIG. In addition, a side differential duct 46 extends above the blower unit 32.
[0018]
FIG. 4 is a sectional view showing the vicinity of the surface cooling air duct 19. The surface cooling air duct 19 has a substantially hat-shaped cross section as a whole, and a flange portion 33 is formed on the instrument panel 10 side. On the back surface of the instrument panel 10 where the surface cooling air duct 19 is attached, a large number of mesh-shaped ventilation holes 34 are formed. As shown in the figure, the instrument panel 10 includes a surface material 35 on the front side, a core material 36 on the rear side, and a foam material 37 disposed between the skin material 35 and the core material 36. The skin material 35 and the core material 36 are both air-impermeable, and the foam material 37 is air-permeable as an open-cell type. Therefore, the cool air w fed into the foam material 37 does not leak from the skin material 35 nor the core material 36, and is sent slowly as the breeze w2 along the instrument panel 10 inside the foam material 37. Paid. Since the surface cooling air duct 19 is formed of a synthetic resin including the flange portion 33, the flange portion 33 is welded to the core member 36 of the instrument panel 10 to allow the cool breeze w2 to escape to the outside. Can be sent without any. The air outlet 22 has a structure in which a grill 38 is embedded in a foam material 37, and extends along the surface of the instrument panel 10 from the lower surface cooling air duct 19 through the vent hole 34 and the foam material 37. The supplied breeze w2 is blown out of the grill 38 of the air outlet 22 into the vehicle interior.
[0019]
FIG. 5 is a schematic diagram schematically showing the inside of the instrument panel 10 having the surface cooling structure according to the present embodiment. As described above, the air conditioner unit 25 is disposed on the front side of the vehicle, and the vent duct 27 extends on the rear side of the air conditioner unit 25 along the vehicle width direction. Side vents 12 and 13 and a center vent 11 are provided on both left and right ends and a center rear side of the vent duct 27, respectively, and the vent duct 27 is connected to the surface cooling air ducts 19 and 20. The vents other than these vents are omitted for simplicity of description. Each of the vents is provided with a grill 39, and a center vent 11 and side vents 12 and 13 are provided inside the grill 39. There are provided switching doors 40, 41, 42 for opening and closing the doors. The surface cooling air ducts 19 and 20 communicate with the air outlet 22 through the air holes 34 and the foam material 37 of the instrument panel 10.
[0020]
The flow of cool air by the surface cooling structure of the vehicle instrument panel 10 having the above configuration will be described. First, a case of blowing out a normal spot-like cold air w1 will be described with reference to FIGS. As shown in FIG. 7, when the switching door is opened, a spot cool air w1 having a large air volume is blown from the center vent 11 and the side vents 12 and 13 toward the vehicle interior. Here, as shown in the figure, even when the switching doors 40 to 42 are opened, the cool air w is supplied from the air conditioner unit 25 to the surface cooling air ducts 19 and 20 via the vent duct 27. However, since the opening area of the center vent 11 and the side vents 12 and 13 is much larger than the opening area of the ventilation hole 34 for surface cooling (see FIG. 4), the center vent 11 and the side vents 12 and 13 are ventilated. The resistance is small, and the amount of the blown cold wind w1 is also large. When the switching doors 40 to 42 are opened in this way, as shown in FIG. 8, spot-like cold air w1 is blown to the occupant 43.
[0021]
On the other hand, a case where the switching doors 40 to 42 are closed will be described with reference to FIGS. As shown in FIG. 10, the cool air w is supplied from the air conditioner unit 25 to the surface cooling air ducts 19 and 20 via the vent duct 27 and then blown out from the air outlets 22 and 23 toward the vehicle interior. You. Specifically, as described with reference to FIG. 4, the cool air w flows from the surface cooling air duct 19 into the foam material 37 through the ventilation hole 34 formed in the core material 36 of the instrument panel 10, 37 flows upward along the instrument panel 10 surface. The foam 37 has a large number of fine air bubbles formed continuously and has air permeability, so that the cool air w flows through the interior of the foam 37 slowly and upwards to become the breeze w2, thereby cooling the skin material 35. Then, after the breeze w2 is blown out from the air outlet 22, it flows slowly and softly toward the occupant 43 along the surface of the instrument panel 10 as shown in FIG. Here, since the skin material 35 is cooled by the breeze w2, the temperature difference between the front surface side and the back surface side of the skin material 35 disappears, or the temperature difference is small on the back surface side, but the temperature difference is small, and furthermore, dehumidification is performed. The flow of the cool breeze w2 on the surface of the instrument panel 10 provides a dehumidifying effect on the surface of the instrument panel 10, and no dew condensation occurs on the surface of the instrument panel 10. As shown in FIG. 2, since the surface of the instrument panel 10 is cooled by the surface cooling, the interior of the vehicle can be indirectly cooled by the surface of the instrument panel 10. Since the indirect cooling does not directly blow the spot-like cold air to the occupant 43, the occupant 43 does not feel uncomfortable.
[0022]
Further, as shown in FIG. 12, since the surface of instrument panel 10 is cooled, radiant heat H emitted from occupant 43 moves to the surface of instrument panel 10 and is absorbed, thereby indirectly in the vehicle interior. Surface cooling for cooling can be performed. Normally, from the principle of radiant heat, all solid surfaces emit radiant heat in the form of electromagnetic waves proportional to the fourth power of their absolute temperature, and between two fixed surfaces having different temperatures, radiation occurs according to the temperature difference. Heat transfer occurs. As described above, when the instrument panel 10 is cooled, heat is directly transferred between the surface of the instrument panel 10 and the occupant 43, so that efficient surface cooling can be performed.
[0023]
FIG. 13 is a graph showing a correlation between the cooling capacity and the air volume. As shown in this graph, the cooling capacity is proportional to the amount of air blown. That is, when the rotation speed of the cooling fan is increased to increase the air volume, the cooling capacity is also improved.
[0024]
Conventionally, when cooling the interior of a vehicle, the cooling fan is quickly operated to rapidly cool the interior of the vehicle, temporarily cooling the interior of the vehicle, and then lowering the cooling fan speed to lower the air flow to reduce the cooling capacity. The method is adopted. However, according to the present invention, the temperature inside the vehicle compartment can be adjusted without lowering the cooling fan speed, that is, without lowering the cooling capacity, so that very efficient cooling can be performed.
[0025]
As described above, the present invention has been described by taking the embodiment as an example. However, the present invention is not limited to this embodiment, and various embodiments can be adopted without departing from the gist of the present invention. it can.
[0026]
For example, in the above-described embodiment, cold air is blown out from the center vent 11 and the side vents 12 and 13 which are the normal vent outlets. Therefore, the air flowing into the foam material 37 is also cold air. It is also possible to let wind flow into the foam material 37, and in that case, surface heating in the instrument panel 10 becomes possible. 2 and 8, D1 is a differential door for opening and closing the air flowing to the differential duct 26 of the air conditioner unit, and D2 is a vent door for opening and closing the air flowing to the vent duct 27.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an instrument panel according to an embodiment of the present invention.
FIG. 2 is a sectional view taken along line AA of FIG.
FIG. 3 is a sectional view taken along line BB of FIG. 1;
FIG. 4 is an enlarged sectional view showing a main part of FIG.
FIG. 5 is a schematic view showing the inside of an instrument panel having a surface cooling structure according to an embodiment of the present invention.
FIG. 6 is a perspective view showing the instrument panel in a state where spot air is being supplied from a vent outlet.
FIG. 7 is a schematic diagram showing a flow of cold air inside the instrument panel in a state where spot air is being sent from a vent outlet.
FIG. 8 is a schematic view showing a state where a spot wind is blown to an occupant.
FIG. 9 is a perspective view of the instrument panel showing a flow of cool air inside the instrument panel in a state where a breeze is being supplied from an air outlet.
FIG. 10 is a schematic diagram showing a flow of cool air inside the instrument panel in a state where a breeze is being supplied from an air outlet.
FIG. 11 is a schematic diagram illustrating a state in which a breeze is being blown out from an air outlet to an occupant.
FIG. 12 is a schematic diagram showing a state in which radiant heat generated from an occupant moves to an air outlet of an instrument panel.
FIG. 13 is a graph showing a relationship between a cooling capacity and a blowing amount of cool air.
[Explanation of symbols]
10 Instrument panel 11 Center vent (vent outlet)
12, 13… Side vent (vent outlet)
22, 23 ... air outlet 35 ... skin material 36 ... core material 37 ... foam material 40-42 ... switching door

Claims (4)

A non-breathable skin (35) and a core (36) are provided on the front side and the back side, respectively, and a gas-permeable foam is provided between the skin (35) and the core (36). In a surface cooling structure of a vehicle instrument panel provided with an air conditioner on an instrument panel (10) provided with a material (37),
Air outlets (22, 23) comprising openings formed in the skin material (35) are provided, and dehumidified cool air (w) from the air conditioner is supplied to the inside of the foam material (37) of the instrument panel (10). After flowing into the vehicle from a location away from the air outlets (22, 23) and feeding it along the surface of the instrument panel (10), the air is blown out into the vehicle interior from the air outlets (22, 23). A surface cooling structure for an instrument panel for a vehicle, characterized in that: The cross-sectional shape of the instrument panel (10) is formed in a curved shape with a high front side and a low rear side, and the air outlets (22, 23) are formed in a front part of the instrument panel (10). The surface cooling structure of a vehicle instrument panel according to claim 1, wherein: The instrument panel (10) is provided with vent outlets (11, 12, 13) which are different from the air outlets (22, 23). A switching door (40, 41, 42) capable of selectively distributing cold air (w) to be supplied and cold air (w) to be supplied to the air outlets (22, 23) is provided. The surface cooling structure for an instrument panel for a vehicle according to claim 1 or 2, wherein: 4. The air blower according to claim 1, wherein cool air (w 2) is blown out from the air outlets (22, 23) to cool a surface of the instrument panel (10) through which the cool air (w2) flows. 5. A surface cooling structure for an instrument panel for a vehicle as described in the above.

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