JP4342916B2 - Vehicle defroster device - Google Patents

Description

  The present invention relates to a vehicle defroster device that blows warm air on glass.

  Some recent vehicles adopt a design in which the lower end of the windshield is advanced forward in the vehicle body. In such vehicles, the vertical length of the glass tends to increase. In order to perform defrosting that melts ice on the outer surface of the glass and defrosting on the inner surface of the glass on the glass with a long vertical length in this way, it is provided at the front position of the interior member under the glass in the longitudinal direction of the vehicle body as usual. Applying a defroster device that blows out the warm air of the air conditioner to the lower part of the glass from the blown outlet, the warm air that is blown toward the lower part of the glass and guided along the glass and flows upward reaches the upper end of the glass. This causes a problem that the effect does not reach the top of the glass. On the contrary, in order to exert an effect up to the upper part of the glass, if hot air is blown out to the middle part in the vertical direction of the glass from the air outlet provided at the intermediate position in the vehicle longitudinal direction of the interior member under the glass, naturally However, there is a problem that the effect does not reach the bottom of the glass.

  In order to solve these problems, hot air flows from the blowout port provided at the front position in the vehicle body longitudinal direction of the interior member to the middle part along the blown glass toward the lower part of the glass, and separately from this, Although it is possible to guide the warm air along the blown glass from the outlet provided at the intermediate position in the longitudinal direction of the vehicle body of the interior member to the middle part in the vertical direction of the glass, it flows to the upper end part. Since the total air volume increases, another problem arises in that warm air hits the head of the occupant. Also, in this case, in order to blow warm air on the glass in the vehicle width direction, two front and rear outlets are provided over the entire vehicle width direction, and piping for flowing warm air to these blow outlets is provided in the vehicle width direction. There is a problem that it is difficult to install other devices such as a head-up display. In addition, it is conceivable to attach a heating wire to the glass separately, but this is costly and requires a large amount of electric power, resulting in another problem of worsening fuel consumption.

In order to solve the above problems, it is considered that hot air is blown down from the upper end portion of the glass, and the hot air is allowed to flow from the upper end portion of the glass to the lower end portion by sucking in the lower portion of the glass (for example, Patent Document 1).
JP-A-5-193455

  In this apparatus, since warm air is blown down from the upper part, it is necessary to guide the warm air of the air conditioner to the upper part through a pipe. However, if the hot air is guided by a long pipe in this way, the temperature will drop before the blowout, and there will be a problem that it takes time until the effect appears. For this reason, it is conceivable to separately provide a hot air blowing device for a defroster that blows hot air from the top, but the cost naturally increases.

  Therefore, an object of the present invention is to provide a vehicle defroster device capable of effectively performing defrosting and demisting while suppressing an increase in cost even for glass having a long vertical length.

In order to achieve the above-described object, the invention according to claim 1 is directed to a substantially center in the vehicle front-rear direction of an interior member (for example, the instrument panel 13 in the embodiment) positioned below the glass (for example, the windshield 12 in the embodiment). A main air outlet (for example, the main air outlet 37 in the embodiment) that blows warm air so as to flow toward the middle position in the vertical direction of the glass and flow upward along the glass; A sub-air outlet (for example, the sub-air outlet 38 in the embodiment) that is provided on the front side in the direction and blows warm air toward a lower side than an intersecting line orthogonal to the surface of the glass (for example, the sub-air outlet 38 in the embodiment). An air outlet (34) and a suction port (for example, an implementation) for sucking in the warm air blown out by the auxiliary air outlet at the front end of the interior member in the vehicle front-rear direction. Disposed the inlet 35) in condition, the sub air outlet, a shape that is inclined so as to be positioned in the longitudinal direction of the vehicle body front side as it goes upward, the extension line of the slope, perpendicular to the glass from the open end It is characterized in that it is on the front side in the vehicle longitudinal direction with respect to the line drawn in the direction and intersects the glass .

According to a second aspect of the present invention, in the first aspect of the invention, the air outlet has a diameter-enlarged portion having a substantially triangular shape with a diameter enlarged toward the opening end side, and is provided in the diameter-enlarged portion. The cross-sectional area of the main blower outlet and the sub blower outlet is determined at a position in the longitudinal direction of the vehicle, and the cross section has a divided part reduced to be similar to the enlarged diameter part .
The invention according to claim 3 is characterized in that, in the invention according to claim 2, the center in the vehicle front-rear direction of the divided portion is located in front of the center in the vehicle front-rear direction of the enlarged diameter portion.

  According to the first aspect of the present invention, the hot air having a high temperature emitted from the air outlet provided in the interior member under the glass, which is short from the heater core, is blown to the intermediate position in the vertical direction of the glass directed by the air outlet. It flows along the glass without peeling from the glass because the distance is short, while a part of the warm air is drawn down from the suction port provided in the vicinity of the lower end of the glass and down along the glass. Will flow into. In this way, hot air having a high temperature can be applied to a glass having a long vertical length without increasing the total air volume, and defrosting and demisting can be performed effectively. Moreover, since it is not necessary to separately provide a hot air blowing device for the defroster, an increase in cost can be suppressed.

Moreover , hot air with a high temperature from the main air outlet of the air outlet is blown to the middle position in the vertical direction of the glass directed by the air outlet, and without being separated from the glass upward along the glass because the distance is short On the other hand, a part of the hot air flows downward along the glass by being sucked from a suction port provided near the lower end of the glass. At the same time, hot air having a high temperature from the auxiliary air outlet provided on the front side in the longitudinal direction of the vehicle body from the main air outlet of the air outlet is blown downward from the directing position of the glass main air outlet. It flows downward along the glass by suction from the suction port provided in the vicinity of the lower end of the glass. In this way, hot air is efficiently blown downward by sucking in the suction port by blowing warm air downward at a sub blower outlet that is different from the main blower outlet that blows hot air mainly flowing upward along the glass. It can flow. In this way, it is possible to reliably apply hot air to a glass having a long vertical length without increasing the total air volume , and defrosting and demisting can be performed more effectively.
According to the invention which concerns on Claim 2, the flow-path cross-sectional area of a main blower outlet and a sub blower outlet can be determined appropriately by the division part provided in the enlarged diameter part.
According to the invention which concerns on Claim 3, a division | segmentation part is located in the front side rather than the vehicle front-back direction center of an enlarged diameter part so that the direction of a main blower outlet may blow off warm air with a bigger air volume than a sub blower outlet. The flow passage cross-sectional area of the main blower outlet can be set larger than the flow passage cross-sectional area of the sub blower outlet, and it is possible to reliably apply hot air to the entire surface of the glass.

A vehicle defroster device according to a first embodiment of the present invention will be described below with reference to FIG.
FIG. 1 shows an upper front side of an intermediate portion of the vehicle body 10 in the longitudinal direction of the vehicle body. A windshield (glass) 12 extends from the front end portion of the vehicle body roof 11 in the longitudinal direction of the vehicle body so as to be located on the lower side of the vehicle body. An instrument panel (interior member) 13 is provided below the windshield 12, and a dash upper 14 is provided on the front side of the instrument panel 13 in the longitudinal direction of the vehicle body.

  An inside / outside air box 21 of the air conditioner 20 is provided in the instrument panel 13 on the rear side of the dash upper 14 in the longitudinal direction of the vehicle body, and further through the outside air inlet 23 formed in the dash upper 14. The outside air is introduced into the inside / outside air box 21 through the outside air introduction port 24 formed between the inside and outside air box 21. The inside / outside air box 21 is formed with an inside air introduction port 27 for taking in the inside air in the vehicle compartment 26 on the rear side of the outside air introduction port 24 in the longitudinal direction of the vehicle body. The inside / outside air box 21 has a plate-like shape and closes the inside air introduction port 27 and opens the outside air introduction port 24 (the state shown in FIG. 1), and closes the outside air introduction port 24 and closes the inside air introduction port. An inside / outside air switching door 28 that swings around the swing shaft 29 is provided until the state 27 is opened.

  The air conditioner 20 has a blower 30 that sucks and discharges air in the inside / outside air box 21 in the instrument panel 13. Although not shown, the air discharged by the blower 30 is contained in the instrument panel 13. The air is cooled by an evaporator provided in the vehicle and dehumidified, and the air is reheated by a heater core provided in the instrument panel 13 as necessary and blown out into the vehicle compartment 26.

  And the vehicle defroster apparatus 31 of 1st Embodiment is comprised by a part of above-described air conditioning apparatus 20, and while opening to the upper surface 32 of the instrument panel 13 in the instrument panel 13 under the windshield 12. A blower outlet 34 that blows warm air toward the middle position in the vertical direction of the windshield 12 and flows upward along the windshield 12, and an opening in the upper surface 32 of the instrument panel 13 and in the vicinity of the lower end of the windshield 12 And a suction port 35 for sucking a part of the warm air. Here, the warm air blown out from the air outlet 34 is air dehumidified by the above-described evaporator and reheated by the heater core.

  The blower outlet 34 is formed over substantially the entire length range of the instrument panel 13 in the vehicle width direction, and is directed to the lower portion of the windshield 12 from the center in the vertical direction, at an intermediate position in the vertical direction of the windshield 12. A main blowout port 37 that blows out warm air so as to flow upward along the front and rear sides of the main blowout port 37 in the front-rear direction of the vehicle body. It has an auxiliary outlet 38 for blowing out warm air. Both the main air outlet 37 and the sub air outlet 38 are formed over substantially the entire length range in the vehicle width direction of the instrument panel 13.

  Here, the main air outlet 37 has a shape that is inclined so that the upper side is located on the rear side in the longitudinal direction of the vehicle body. Specifically, the extension line is drawn from the opening end in a direction perpendicular to the windshield 12. Inclined so as to intersect with the windshield 12 at an angle of 45 degrees or less and on the rear side in the longitudinal direction of the vehicle.

  Further, the auxiliary air outlet 38 has a shape that is inclined so as to be positioned on the front side in the longitudinal direction of the vehicle body on the upper side. Specifically, an extension line of the auxiliary air outlet 38 is a line drawn in the direction perpendicular to the windshield 12 from the opening end. It is slightly on the front side in the vehicle longitudinal direction and intersects the windshield 12 at an angle close to 90 degrees.

  The main air outlet 37 and the sub air outlet 38 are connected to a common defroster duct 40, and hot air from the heater core is introduced through the defroster duct 40. The flow passage cross-sectional area of the main air outlet 37 is set larger than the flow passage cross-sectional area of the sub air outlet 38 so that the main air outlet 37 blows warm air with a larger air volume than the sub air outlet 38. .

  The suction port 35 is formed over substantially the entire length range of the instrument panel 13 in the vehicle width direction, and communicates with the suction chamber 42 formed over the substantially full length range of the instrument panel 13 in the vehicle width direction. . Only one suction duct 43 is connected to the suction chamber 42, and a one-way valve 46 is provided on a side surface 45 where the suction duct 43 is not blocked by the inside / outside air switching door 28 of the inside / outside air box 21. Connected through. The one-way valve 46 allows only air flow from the suction port 35 and the suction chamber 42 side to the inside / outside air box 21 side. That is, the flow of air from the inside / outside air box 21 to the suction port 35 is restricted.

  In the vehicle defroster device 31 of the first embodiment described above, the blower 30 of the air conditioner 20 sucks air from the inside / outside air box 21 and blows it out to the evaporator during operation. Then, the air from the inside / outside air box 21 is dehumidified by the evaporator, reheated by the heater core, and blown out from the blowout port 34 through the defroster duct 40, while the inside and outside air box 21 is sucked from the suction port 35 into the suction chamber 42 and the suction. Air is sucked through the duct 43.

  Most of the hot air having a high temperature blown from the blower outlet 34 through the defroster duct 40 having a short distance from the heater core due to the air flow is from the main blower outlet 37 to the intermediate position in the vertical direction of the windshield 12. Most of the warm air blown out from the main blower outlet 37 flows from the main blower outlet 37 along the inner surface of the windshield 12 without peeling off from the front windshield 12 because the distance is short. The remaining part of the hot air that has been blown out flows along the windshield 12 by the suction of the suction port 35 provided in the vicinity of the lower end of the windshield 12. At the same time, a part of the remaining warm air blown from the blower outlet 34 is supplied from the sub blower outlet 38 provided on the front side in the vehicle longitudinal direction of the main blower outlet 37 to the main blower outlet 37 of the windshield 12. The air is blown downward from the directing position and flows downward along the windshield 12 by suction from the suction port 35 provided in the vicinity of the lower end of the windshield 12.

  In this way, warm wind can be applied to the entire windshield 12 having a long vertical length without increasing the total air volume, and defrost and demist can be effectively performed. In other words, it is possible to remove the fogging of the entire surface of the windshield 12 and to effectively defrost the lower part of the windshield 12, so that the outside of the black ceramic portion near the front end of the windshield 12 in the longitudinal direction of the vehicle body. It is possible to eliminate the sticking of wiper blades that are hidden in the window. In addition to the warm air from the main air outlet 37 that flows upward along the windshield 12, the hot air is efficiently blown downward by sucking in the air inlet 35 by blowing out the warm air from the sub air outlet 38 to the lower side. Therefore, warm air can be reliably applied to the entire windshield 12 having a long vertical length, and defrosting and demisting can be performed more effectively.

Moreover, since it is not necessary to separately provide a hot air blowing device for the defroster, an increase in cost can be suppressed.
Furthermore, the air outlet 34 can be disposed on the passenger side by providing the suction port 35.
In addition, since warm air can be applied to the windshield 12 without increasing the total air volume, it is possible to reduce the contact of warm air on the passenger and practical comfort when operating the vehicle defroster device 31. Can be improved.

  Furthermore, unlike the case where air is blown out because the suction port 35 is for sucking air, only one suction duct 43 connecting the suction port 35 and the suction chamber 42 and the inside / outside air box 21 is required. As a result, it is possible to install devices such as a head-up display, a passenger seat airbag, and a CRT display in the vicinity of the relatively front end of the instrument panel 13.

  In addition, since the suction duct 43 is connected to the inside / outside air box 21 via the one-way valve 46, the suction duct 43 is connected to any position as long as it is not blocked by the inside / outside air switching door 28 of the inside / outside air box 21. And the degree of freedom in layout can be increased.

  A vehicle defroster device according to a second embodiment of the present invention will be described below with reference to FIG. 2 focusing on the differences from the first embodiment. In addition, the same code | symbol is attached | subjected to the part similar to 1st Embodiment, and the description is abbreviate | omitted.

  In the vehicle defroster device 31 of the second embodiment, the air outlet 34 that blows warm air toward the windshield 12 is not divided into a main air outlet 37 and a sub air outlet 38. That is, only the outlet 34 that blows warm air in one direction toward the windshield 12 is provided.

  The air outlet 34 of the second embodiment has a shape that is inclined so as to be located on the rear side in the vehicle longitudinal direction as the upper side. Specifically, the extension line extends in a direction perpendicular to the windshield 12 from the opening end. It is located behind the drawn line in the longitudinal direction of the vehicle body and is inclined so as to intersect the windshield 12 at an angle of 45 degrees or less.

  According to the vehicle defroster device 31 of the second embodiment having such a configuration, most of the hot air blown out from the blowout port 34 via the defroster duct 40 is along the inner surface of the windshield 12. On the other hand, the remaining part of the hot air blown out from the windshield 12 flows downward along the glass by suction of the suction port 35 provided in the vicinity of the lower end of the glass. It will be. Therefore, although it is slightly inferior to the first embodiment, it is possible to apply hot air over the entire windshield 12 with a long vertical length without increasing the total air volume, and to effectively perform defrost and demist. Will be able to.

  And since only the blower outlet 34 which blows off warm air in one direction toward the windshield 12 is provided, the structure by the side of the blower outlet 34 can be simplified and cost can be reduced.

  A vehicle defroster device 31 according to a third embodiment of the present invention will be described below with reference to FIG. 3, focusing on differences from the first embodiment. In addition, the same code | symbol is attached | subjected to the part similar to 1st Embodiment, and the description is abbreviate | omitted.

  In the vehicle defroster device 31 of the third embodiment, the suction duct 43 does not have the one-way valve 46, and the duct connection port 49 formed in the support portion 48 inside the inside air introduction port 27 of the inside / outside air box 21 is provided. It is connected. Then, the inside / outside air switching door 28 is provided with a sub door 50 that can open and close the duct connection port 49 when the inside air introduction port 27 is closed, so that the sub door 50 can swing about the swing shaft 51. ing. Even when the inside / outside air switching door 28 closes the inside air introduction port 27 during operation of the vehicle defroster device 31, the sub door 50 swings by suction by the blower 30 to open the duct connection port 49. The suction port 35 and the suction duct 43 are communicated with the inside / outside air box 21. Further, when the suction by the blower 30 is stopped when the operation of the vehicle defroster device 31 is stopped, the sub door 50 closes the duct connection port 49 by a biasing force of a spring (not shown), and the sub door 50 passes through the inside / outside air box 21. The outside air is restricted from flowing to the suction port 35.

According to the vehicular defroster device 31 of the third embodiment, the same effect as that of the first embodiment can be obtained. In addition, the one-way valve 46 is abolished and the inside / outside air switching door 28 is connected to the sub door 50. The cost can be reduced.
In addition, you may change the blower outlet 34 in 3rd Embodiment like 2nd Embodiment.

  A vehicle defroster device according to a fourth embodiment of the present invention will be described below with reference to FIG. 4 focusing on the differences from the first embodiment. In addition, the same code | symbol is attached | subjected to the part similar to 1st Embodiment, and the description is abbreviate | omitted.

  In the vehicle defroster device 31 of the fourth embodiment, the inside / outside air box 21 has a cylindrical surface portion 52, the outside air introduction port 24 is formed on the front side of the cylindrical surface portion 52 in the longitudinal direction of the vehicle body, and the longitudinal direction of the cylindrical surface portion 52 in the vehicle body direction. Inside air inlet 27 is formed on the rear side, and duct connecting port 49 is connected to suction duct 43 without one-way valve 46 on the rear side in the longitudinal direction of the vehicle body from inside air inlet 27 of cylindrical surface portion 52. Is formed.

  In addition, a rotary door 54 that rotates about the rotary shaft 53 in the inside / outside air box 21 is provided in place of the inside / outside air switching door 28, and the rotary door 54 rotates to provide a cylindrical shutter. The portion 55 closes the outside air introduction port 24 and opens the inside air introduction port 27 and the duct connection port 49, and the state closes the inside air introduction port 27 and opens the outside air introduction port 24 and the duct connection port 49 (see FIG. 4) and the inside / outside air box 21 are switched between the inside air introduction port 27 and the duct connection port 49 and the outside air introduction port 24 opened (a state indicated by a two-dot chain line shown in FIG. 4).

  The rotary door 54 causes the suction port 35 and the suction duct 43 to communicate with the inside / outside air box 21 with the duct connection port 49 open when the vehicle defroster device 31 is operated. Further, when the operation of the vehicle defroster device 31 is stopped, if the state in which the inside air introduction port 27 is closed and the outside air introduction port 24 is opened is selected, the duct connection port 49 is also closed, and the inside / outside air box 21 is closed. The outside air is restricted from flowing to the suction port 35 via the.

According to the vehicle defroster device 31 of the fourth embodiment as described above, the same effect as that of the first embodiment can be obtained. In addition, the one-way valve 46 is eliminated, and the duct connection port 49 is provided by the rotary door 54. Since the door is opened and closed, the cost can be reduced.
In addition, you may change the blower outlet 34 in 4th Embodiment like 2nd Embodiment.

  In addition, although the 1st-4th embodiment described above demonstrated the vehicle defroster apparatus 31 for the windshield 12, it is applicable also to the vehicle defroster apparatus for rear glasses.

1 is a side sectional view schematically showing a vehicle defroster device according to a first embodiment of the present invention. It is a sectional side view which shows roughly the defroster apparatus for vehicles of 2nd Embodiment of this invention. It is a sectional side view which shows roughly the defroster apparatus for vehicles of 3rd Embodiment of this invention. It is a sectional side view which shows roughly the defroster apparatus for vehicles of 4th Embodiment of this invention.

Explanation of symbols

12 Windshield (glass)
13 Instrument panel (interior material)
34 Air outlet 35 Air inlet 37 Main air outlet 38 Sub air outlet

Claims (3)

A main blowout port that blows warm air toward an intermediate position in the vertical direction of the glass and flows upward along the glass at a substantially central portion in the vehicle longitudinal direction of the interior member located below the glass; A blower outlet is provided, which is provided on the front side of the blower body in the front-rear direction of the vehicle body and includes a secondary blower outlet that blows warm air toward a lower side than an intersecting line orthogonal to the surface of the glass.
A suction port for sucking in the warm air blown out by the auxiliary air outlet is disposed at a front side end portion of the interior member in the vehicle front-rear direction ,
The auxiliary air outlet has a shape that inclines so that the upper side is positioned on the front side in the vehicle longitudinal direction, and the extension line of the inclination is on the front side in the vehicle longitudinal direction with respect to the line drawn in the direction perpendicular to the glass from the opening end. A vehicle defroster device characterized by being crossed with respect to the glass . The blower outlet has a diameter-enlarged portion having a substantially triangular cross section whose diameter is increased toward the opening end side, and is provided in the enlarged diameter part, and the main blower outlet and the sub blower outlet are disposed at positions in the vehicle front-rear direction. 2. The vehicle defroster device according to claim 1, further comprising a divided portion whose cross section is reduced to be similar to the diameter-expanded portion. The vehicle defroster device according to claim 2, wherein a center in the vehicle front-rear direction of the divided portion is positioned in front of a center in the vehicle front-rear direction of the enlarged diameter portion.

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