JP2014015139A - Vehicle heating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle heating apparatus which effectively utilizes a larger portion of the maximum heating capacity of the radiation heater for heating in a vehicle cabin.SOLUTION: A vehicle heating apparatus 28 of this invention includes: a vehicle body inner wall 13 disposed in a vehicle cabin; a radiation heater 17 which is disposed at a position facing the vehicle body inner wall 13 through a predetermined space 25; and a blower fan 23 which blows air in the predetermined space 25 between the radiation heater 17 and the vehicle body inner wall 13 to the exterior of the predetermined space 25.

Description

  The present invention relates to a vehicle heating device provided in a vehicle such as an automobile.

  2. Description of the Related Art Conventionally, a structure has been adopted in which a vehicle heating device composed of a radiant heater having higher heating efficiency than an air conditioning unit (HVAC) is provided in the vicinity of the feet of a driver's seat (for example, see Patent Document 1). Here, HVAC is an abbreviation for Heating Ventilation and Air-Conditioning. The feet of the passenger seated on the seat can be efficiently warmed by the radiant heat generated from the radiant heater.

JP 2006-224813 A

  However, in the above-described conventional radiant heater, when heated to a predetermined temperature, the heating capacity of the radiant heater is lowered in order to maintain the predetermined temperature at a constant temperature. For this reason, after a radiant heater reached predetermined temperature, there existed a problem that only a part of heating capability which a radiant heater has was utilized.

  Accordingly, an object of the present invention is to provide a vehicle heating device that can effectively use a greater part of the maximum heating capacity of a radiant heater for heating a vehicle interior.

  The vehicle heating apparatus according to the present invention includes a vehicle body inner wall disposed in a vehicle interior, a radiation heater disposed at a position facing the vehicle body inner wall through a predetermined space, and the radiation heater and the vehicle body inner wall. Air blowing means for blowing out the air in the predetermined space between the predetermined space and the outside is provided. The radiant heater radiates radiant heat from both one surface facing the inner wall of the vehicle body and the other surface located on the opposite side of the one surface.

  According to the vehicle heating device of the present invention, the air in the predetermined space is heated by the radiant heat of the radiant heater, and the heated air is blown out into the vehicle room by the blowing means. For this reason, a greater part of the maximum heating capacity of the radiant heater can be effectively used for heating the vehicle interior.

1 is a partial cross-sectional side view showing a vehicle interior in which a vehicle heating apparatus according to a first embodiment of the present invention is disposed. It is an enlarged view of the principal part of FIG. (A) is a graph showing the relationship between the surface temperature of the radiant heater according to the first embodiment and time, (b) is a graph showing the relationship between the power consumption of the radiant heater according to the comparative example and time, (c) is the first graph. It is a graph which shows the relationship between the power consumption of the radiation heater by one Embodiment, and time. It is a perspective view which shows the heating apparatus for vehicles by 2nd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First embodiment]
First, the heating apparatus for vehicles by 1st Embodiment of this invention is demonstrated.

  As shown in FIG. 1, a dash panel 3 is disposed at the front end of the vehicle interior 1 along the vertical direction and the vehicle width direction, and the engine room 5 and the vehicle interior 1 are separated by the dash panel 3. ing. An instrument panel 7 is disposed behind the dash panel 3 along the vehicle width direction, and a seat 11 is disposed on the floor panel 9 behind the instrument panel 7.

  As shown in FIGS. 1 and 2, a plate-like vehicle body inner wall 13 extends toward the rear (vehicle interior 1) at the center in the height direction of the dash panel 3. The vehicle body inner wall 13 has a front end 13 a attached to the dash panel 3 via an L-shaped bracket 15 and a rear end 13 b attached to the lower end 7 a of the instrument panel 7. Further, below the vehicle body inner wall 13, a plate-like radiation heater 17 extends along the vehicle front-rear direction in a state of facing the vehicle body inner wall 13 and parallel to the vehicle body inner wall 13. Inside the radiant heater 17, a heating wire is routed. When a current flows through the heating wire, radiant heat is generated from the radiant heater 17.

  Specifically, a pair of front and rear brackets 19 and 21 extending downward are attached to the front and rear portions of the vehicle body inner wall 13, and the radiation heater 17 is suspended on these brackets 19 and 21. A blower fan 23 as a blower is attached to the rear end of the vehicle body inner wall 13.

  As described above, as shown in FIGS. 1 and 2, the radiation heater 17 is disposed through the predetermined space 25 at a position below the inner wall 13 of the vehicle body. The blower fan 23 is arranged so as to bridge the rear end 13b of the vehicle body inner wall 13 and the rear end 17a of the radiant heater 17 up and down. The air A in the predetermined space 25 located between the radiant heater 17 and the radiant heater 17 is blown out from the predetermined space 25 toward the front of the vehicle body. The front end 17b of the radiant heater 17 is disposed on the rear side by a predetermined distance from the vertical wall surface 3a of the dash panel 3. The air A is interposed between the front end 17b of the radiant heater 17 and the vertical wall surface 3a of the dash panel 3. Is formed. The radiant heater 17 is disposed in the vicinity of the leg portion D0 of the occupant D seated on the seat 11 (specifically, above the feet of the occupant D). The vicinity of the leg D0 of the occupant D in the vehicle interior 1 has a bag structure in which cold air tends to stay by the vehicle body inner side wall 13, the vertical wall surface 3a of the dash panel 3, and the floor panel 9. Thus, the heating device 28 according to the present embodiment includes the vehicle body inner wall 13, the radiation heater 17, and the blower fan 23 (blower unit).

  As shown in FIG. 2, the radiant heater 17 is formed in a plate shape and has an upper surface 29 and a lower surface 31. The upper surface 29 is one surface facing the vehicle body inner wall 13, and the lower surface 31 is another surface positioned on the opposite side of the one surface. The radiant heater 17 radiates radiant heat H1 upward from the upper surface 29 and radiates radiant heat H2 downward from the lower surface 31. The air in the predetermined space 25 is warmed by the radiant heat H1 from the upper surface 29 of the radiant heater 17, the air in the lower space 33 of the radiant heater 17 is warmed by the radiant heat H2 from the lower surface 31, and the leg D0 of the passenger D is radiated heat. Warm directly with H2.

  Next, the air flow according to the present embodiment will be described with reference to FIG.

  When the blower fan 23 is actuated, the air A in the predetermined space 25 heated by the radiant heat H1 from the upper surface 29 of the radiant heater 17 is sent to the front of the vehicle body, and this air A is transmitted to the front end 17b of the radiant heater 17 and the dash panel. 3 circulates to the lower part of the radiant heater 17 from the circulation part 27 between the vertical wall surfaces 3a. Thereafter, the lower part of the radiant heater 17 flows backward, and then the front end of the radiant heater 17 is turned upward and sent to the blower fan 23. Since the subsequent flow of the air A is as described above, the air A in the predetermined space 25 above the radiant heater 17 circulates and convects around the radiant heater 17 while rotating counterclockwise in a side view. .

  Next, the surface temperature and power consumption of the radiation heater 17 will be described with reference to FIG.

As shown in FIG. 3A, the surface temperature is T ₀ in a non-use state in which no current flows through the radiant heater 17. When a current is passed at time t _0, the surface temperature rises in proportion to the time, and at time t ₁ , the surface temperature becomes Tmax, and thereafter is kept constant at the temperature of Tmax.

Further, as shown in FIG. 3 (b), in the case of the comparative example not provided the fan 23, the power consumption when an electric current is applied to the radiant heater 17 at t ₁ from the time t ₀ is Wmax, and the radiant heater 17 the surface temperature is Tmax time _{t 1} after the power consumption is reduced to _{W 1.}

On the other hand, as shown in FIG. 3 (c), in the case of the present invention embodiment to dispose the fan 23, the power consumption when an electric current is applied to the radiant heater 17 at t ₁ from the time t ₀ is Wmax, and the radiant heater surface temperature is Tmax time _{t 1} after the power consumption is _{W 2.}

Here, W ₂ is because it is larger than W _1, power consumption than the comparative example towards the example of the present invention increases. This is because the air A in the predetermined space 25 above the radiant heater 17 is sent out to the front of the vehicle body by the blower fan 23, so that more electric power is required. However, warm air is sent into the vehicle compartment by the difference between W ₂ and W _1, and a greater part of the maximum heating capacity of the radiant heater 17 can be used effectively.

(1) The vehicle heating device 28 according to the present embodiment includes a vehicle body inner wall 13 disposed in a vehicle compartment, and a radiation heater 17 disposed through a predetermined space 25 at a position facing the vehicle body inner wall 13. And a blower fan 23 (blowing means) for blowing the air inside the predetermined space 25 between the radiation heater 17 and the vehicle body inner wall 13 to the outside of the predetermined space 25. The radiant heater 17 has an upper surface 29 (one surface) on the side facing the inner wall 13 of the vehicle body and a lower surface 31 (other surface) located on the opposite side of the upper surface 29. The radiant heats H1 and H2 are radiated from both the lower surface 31.

  Accordingly, the air A in the predetermined space 25 is heated by the radiant heat H <b> 1 of the radiant heater 17, and the heated air A is blown out into the vehicle interior 1 by the blower fan 23. Thus, since the radiation heater 17 with high heating efficiency can be used for heating the air A in the vehicle interior 1, the vehicle heating device 28 with higher heating efficiency is obtained. Therefore, a greater part of the maximum heating capacity of the radiant heater 17 can be used effectively.

(2) The radiant heater 17 is disposed in the vicinity of the leg D0 of the occupant D seated on the seat 11.

  Therefore, it is possible to efficiently warm the vicinity of the leg portion D0 of the occupant D in which the cold air A tends to stay in the vehicle interior 1.

(3) The blower fan 23 (blower unit) blows out the air A in the predetermined space 25 toward the front side of the vehicle body.

  In the vehicle interior 1, the vicinity of the leg D <b> 0 of the seated occupant D has a bag structure in which cold air A tends to stay. Therefore, the leg vicinity D0 of the occupant D can be warmed more efficiently by blowing out the warm air A toward the part.

[Second Embodiment]
Next, the vehicle heating apparatus according to the second embodiment of the present invention will be described. However, the same reference numerals are given to the parts having the same structure as the first embodiment described above, and the description will be omitted.

  As shown in FIG. 4, a shielding plate 41 that extends to the inner wall 13 of the vehicle body and surrounds the predetermined space 25 is provided at the peripheral portion of the plate-like radiation heater 17. It has an opening 43 for discharging the air A to be sent.

  Specifically, a shielding plate 41 extending toward the vehicle body inner wall 13 along the peripheral edge portion is provided at the peripheral edge portion of the rectangular radiation heater 17 in plan view. The shielding plate 41 is formed in a rectangular tube shape, and the radiation heater 17 is attached to the vehicle body inner wall 13 via the shielding plate 41. A portion surrounded by the radiation heater 17, the shielding plate 41, and the vehicle body inner wall 13 becomes a predetermined space 25. A blower fan 23 is attached to the right end of the rear surface of the shielding plate 41, and a rectangular opening 43 is formed at the left end of the front surface.

  Therefore, the air A that is blown out from the blower fan 23 and flows forward in the predetermined space 25 flows in an oblique direction toward the left side of the vehicle as it goes forward in plan view, and is then discharged from the opening 43. The circulation of the air A in the passenger compartment is the same as in FIG. As described above, the vehicle heating device 45 according to the present embodiment includes the vehicle body inner wall 13, the radiation heater 17, the blower fan 23, and the shielding that extends from the radiation heater 17 to the vehicle body inner wall 13 and surrounds the predetermined space 25. And a plate 41.

  Below, the effect by this embodiment is demonstrated.

(1) The radiation heater 17 is provided with a shielding plate 41 that extends to the vehicle body inner wall 13 and surrounds the predetermined space 25, and the shielding plate 41 discharges air A sent by the blower fan 23. An opening 43 is provided.

  Since the warm air A located in the predetermined space 25 is accommodated in the predetermined space 25 by the shielding plate 41, heat loss can be suppressed without escaping outward. Therefore, by providing the opening 43 at a desired position in the shielding plate 41, the warmed air A can be efficiently discharged toward the intended site.

  In addition, the heating apparatus which concerns on this invention is not limited to embodiment mentioned above, A various deformation | transformation and change are possible based on the technical idea of this invention.

  For example, in the first and second embodiments, the heating device is disposed in the driver seat, but may be disposed in the passenger seat or the rear seat.

A Air D Crew D0 Leg H1, H2 Radiant heat 1 Vehicle interior 13 Car body inner wall 17 Radiant heater 23 Blower fan (Blower unit)
25 Predetermined space 28, 45 Heating device 29 Upper surface (one surface)
31 Bottom surface (other surface)
41 Shielding plate 43 Opening

Claims (4)

A vehicle body inner wall disposed in the vehicle compartment, a radiation heater disposed at a position facing the vehicle body inner wall via a predetermined space, and the predetermined space between the radiation heater and the vehicle body inner wall. Air blowing means for blowing the air out of the predetermined space,
The radiant heater has one surface facing the inner wall of the vehicle body and another surface located on the opposite side of the one surface, and radiant heat from both the one surface and the other surface. A vehicle heating device configured to dissipate heat.   2. The vehicle heating device according to claim 1, wherein the radiation heater is disposed in the vicinity of a leg portion of an occupant seated on a seat.   The vehicle heating device according to claim 2, wherein the air blowing means blows out air in the predetermined space toward the front side of the vehicle body.   The radiation heater is provided with a shielding plate that extends to the inner wall of the vehicle body and surrounds the predetermined space, and the shielding plate has an opening for discharging air sent by the blowing means. The vehicle heating device according to any one of claims 1 to 3.

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