JP5129047B2 - Vehicle defroster device - Google Patents

Description

  The present invention relates to a vehicle defroster device in which a wind direction changing rib for changing a wind direction of air-conditioned air is installed in a duct that blows air-conditioned air from an air outlet toward a window glass of a vehicle.

[Conventional technology]
2. Description of the Related Art Conventionally, a vehicular defroster device for improving the performance (clear performance) for uniformly and quickly clearing the fog on the inner surface of a front window glass of a vehicle has been known (see, for example, Patent Document 1). As shown in FIG. 8, the vehicle defroster device includes an air passage 103 that guides the conditioned air introduced from the inlet 101 to the outlet 102. A defroster duct 100 that blows out toward the inner surface is provided.
A surface of the air passage wall surface of the defroster duct 100 along which the main flow of the conditioned air flows is defined as a first surface (main flow side surface) 111, and a surface of the air passage wall surface of the defroster duct 100 that faces the first surface 111. Is the second surface (opposite surface) 112, the plate-shaped wind direction changing rib (air guide) 104 that protrudes from the first surface 111 toward the second surface 112 and does not contact the second surface 112 is used as the defroster duct. 100 air passages are provided.

In the defroster device for a vehicle described in Patent Document 1, a plate-like wind direction changing rib 104 that does not reach the second surface 112 protrudes from the first surface 111 toward the second surface 112 in the air passage of the defroster duct 100. Provided. For this reason, compared with the type in which the wind direction changing rib (air guide) is not installed in the air passage of the defroster duct, a uniform blown air can be blown to the front window glass G, so the inner surface of the front window glass G The entire cloudiness can be cleared evenly and quickly.
Here, FIG. 9 is a diagram of the blown wind when the coordinates are taken on the glass surface of the front window glass G in a vehicle defroster apparatus in which no wind direction changing rib (air guide) is installed in the air passage of the defroster duct. It is a characteristic view (wind speed distribution diagram of a type without an air guide) showing a wind speed distribution. A constant velocity line X in FIG. 9 represents a wind speed of about 2.0 m / sec, and a constant velocity line Y in FIG. 9 represents a wind speed of about 3.0 m / sec.
FIG. 10 shows a blowing wind when coordinates are taken on the glass surface of the front window glass G in the vehicle defroster apparatus in which the wind direction changing rib (air guide) 104 is installed in the air passage of the defroster duct 100. Is a characteristic diagram (wind speed distribution diagram of the type with air guide) showing the wind speed distribution. A constant velocity line X in FIG. 10 represents a wind speed of about 2.0 m / sec, and a constant velocity line Y in FIG. 10 represents a wind speed of about 3.0 m / sec.

[Conventional technical problems]
However, in the vehicle defroster device described in Patent Document 1, even if the wind direction changing rib 104 is installed in the air passage of the defroster duct 100, the reduction of the ventilation resistance in the air passage of the defroster duct 100 and the wind direction are performed. The air passage 103 of the defroster duct 100 is blown from the inlet 101 for the purpose of reducing the uneven distribution of the blown air at the downstream portion of the change rib 104 (uniforming the wind speed distribution at the outlet 102). It is characterized in that the wind direction changing rib 104 is installed only on the mainstream side of the conditioned air flowing toward the outlet 102.
Here, the main flow of the conditioned air flowing along the first surface 111 of the defroster duct 100 has a higher flow velocity than the conditioned air other than the main flow. For this reason, since the mainstream of the conditioned air is distributed to both sides in the vehicle width direction (two traveling directions) by the upstream edge of the wind direction changing rib 104, a wind noise or turbulence sound is generated at the wind direction changing rib 104. Propagates through the air passage of the defroster duct 100 and is radiated from the air outlet 102 into the vehicle interior of the vehicle. Therefore, there is a problem in that the noise generated from the air outlet 102 of the defroster duct 100 is increased and the passenger feels uncomfortable and uncomfortable, and the comfort of the passenger is impaired. .
JP 2007-331743 A

  An object of the present invention is to prevent wind noise and turbulence from occurring in the ribs, thereby suppressing an increase in blowing noise radiated from the duct outlet to the vehicle interior of the vehicle, thereby improving passenger comfort. An object of the present invention is to provide a vehicle defroster device.

According to the first aspect of the present invention, the air passage wall surface of the duct includes the concave curved surface that is the outer wall surface in the bending direction of the curved portion, and the surface along which the main flow of the conditioned air flows is the first surface, Among the air passage wall surfaces of the duct, including a convex curved surface that is the inner wall surface in the bending direction of the curved portion, when the surface facing the first surface is the second surface, the rib is provided only on the second surface side. Therefore, the main stream of the conditioned air that is introduced from the introduction port into the air passage of the duct and flows along the first surface in the air passage has a relatively high flow speed, but is installed in the air passage of the duct. Without being affected by the ribs, the air is blown out from the air outlet toward the window glass of the vehicle. On the other hand, the conditioned air other than the mainstream has a slower flow rate than the mainstream of the conditioned air, and even if it collides or hits the rib installed in the air passage of the duct, the wind noise and turbulence noise at the rib is very small . As a result, the generation of wind noise and turbulence noise at the ribs is suppressed, so that an increase in blowing noise radiated from the duct outlet into the vehicle compartment is suppressed. For this reason, a passenger | crew's comfort can be improved.

Further, even in a vehicle defroster device in which a rib projecting from the second surface toward the first surface side is installed in the air passage of the duct, the height of the rib does not reach the first surface. Since the main stream of the conditioned air can pass through the air passage of the duct without being affected by the ribs, the ventilation resistance in the air passage of the duct can be reduced.
Therefore, a very simple duct structure in which a rib that protrudes from the second surface toward the first surface and does not reach the first surface is installed in the air passage of the duct. Reduction of resistance and reduction of blowing noise radiated from the duct outlet can be achieved.

According to the second aspect of the present invention, along with the duct, a pair of guide ribs for blowing out blowing air with a wide and uniform wind speed over the entire surface of the window glass are installed facing each other across the central passage in the air passage of the duct. Therefore, it is possible to obtain a uniform wind speed distribution at a wide angle toward the window glass of the vehicle.
As a result, it is possible to reduce the draft resistance in the air passage of the duct and make the wind speed distribution of the blown air blown out from the outlet uniform, so that the fog on the inner surface of the vehicle window glass can be cleared quickly and uniformly. Can do.
Therefore, a very simple duct structure in which a pair of guide ribs protruding from the second surface toward the first surface and not reaching the first surface is installed in the air passage of the duct. It is possible to reduce the ventilation resistance, reduce the blowing noise radiated from the duct outlet, and make the wind speed distribution of the blowing air blown from the outlet uniform.

According to the third aspect of the present invention, the pair of guide ribs so that the length in the vehicle width direction of the central passage extends like a fan from the upstream end on the inlet side to the downstream end on the outlet side in the air passage of the duct. Since it is installed, it is possible to blow a uniform blowing air at a wide angle from the blower outlet to the window glass, and obtain a wide and uniform blowing speed of the blowing wind over the entire window glass of the vehicle. .
Thus, the same effect as that attained by the 2nd aspect can be attained.
According to the fourth aspect of the present invention, the rib extends from a position intermediate between the inlet and the outlet in the air passage of the duct to a position near the outlet.
According to the fifth aspect of the present invention, the rib extends from a position near the inlet to a position near the outlet in the air passage of the duct.

According to the invention described in claim 6, the height of the rib is gradually increased from a predetermined intermediate position of the air passage of the duct toward the upstream end on the inlet side.
According to the seventh aspect of the present invention, the height of the upstream end on the inlet side of the rib is the highest among the ribs.
According to the eighth aspect of the present invention, the height of the rib gradually decreases from the predetermined intermediate position of the air passage of the duct toward the downstream end on the outlet side.
According to invention of Claim 9, the height of the downstream end by the side of a blower outlet is the lowest rib among ribs.

  The best mode for carrying out the present invention is to prevent the occurrence of wind noise and wind turbulence noise at the ribs, thereby suppressing the increase of blowing noise radiated from the duct outlet to the vehicle cabin, For the purpose of enhancing passenger comfort, a rib that protrudes from the second surface toward the first surface is installed in the air passage of the duct so that the height of the rib does not reach the first surface. Realized by.

[Configuration of Example 1]
1 to 5 show a first embodiment of the present invention. FIG. 1 shows a vehicle defroster device (defroster), and FIG. 2 shows a vehicle air conditioner.

The vehicle air conditioner of this embodiment is connected to an air conditioning unit (air conditioner unit) 1 that air-conditions the interior of a vehicle such as an automobile, for example, and a downstream side of the air conditioner unit 1 in the flow direction of conditioned air (conditioned air). The vehicle defroster device (defroster) 2 is used to remove frost on the front window glass G and fogging of the inner surface using the conditioned air generated by the air conditioner unit 1.
The air conditioner unit 1 is located between an instrument panel on the front side of the vehicle interior of the vehicle and a firewall (dash panel) that partitions the vehicle interior and the engine room of the vehicle, particularly in the upper part of the passenger seat near the feet. It is installed and has an air conditioning duct in which an air passage is formed.

On the upstream side of the air flow of the air conditioning duct, an outside air intake port and an inside air suction port are provided, and on the downstream side of the air flow of the air conditioning duct, a defroster opening, a face opening, and a foot opening are provided. ing.
In the air conditioning duct, a blower fan (blower), an evaporator (refrigerant evaporator, air cooling heat exchanger) and a heater core (air heating heat exchanger) of a refrigeration cycle are provided.
Here, an inside / outside air switching door is provided on the upstream side of the blower fan, and the outside air or the inside air is introduced into the air conditioning duct from the outside air suction port or the inside air suction port by the drive of the blower fan, and is cooled by the evaporator. In addition, the refrigerant | coolant which circulates through the refrigerating cycle comprised with a compressor (refrigerant compressor), a capacitor | condenser (refrigerant condenser), a decompression device (expansion valve), etc. is introduce | transduced into the evaporator.

A heater core is disposed downstream of the evaporator. Cooling water of the internal combustion engine (engine) is introduced into the heater core, and the passing air is heated by the heat. One or more air mix (A / M) doors are arranged on the upstream side of the heater core, and a part of the air cooled by the evaporator (or depending on the opening degree of the A / M door) (or All are reheated as they pass through the heater core, and the remaining air flows around the heater core. Thereafter, the air branched into two (cold air and hot air) joins downstream of the heater core to become air conditioned air, which is a defroster opening or face opening or foot provided at the downstream end of the air conditioning duct. It blows out from the opening.
In addition, one or a plurality of air outlet switching doors are provided on the upstream side of the defroster opening, the face opening, and the foot opening.

Further, the defroster opening is provided at the defroster outlet 12 (and the side defroster outlet) for blowing the conditioned air (mainly hot air) toward the inner surface of the front window glass G (and the inner surface of the side window glass). The defroster duct 3 (and the side defroster duct) communicates with each other.
In addition, the face opening has a face duct (and a side face duct) at the face outlet (and side face outlet) for blowing air-conditioned air (mainly cold air) toward the upper body of the occupant (mainly the head and chest). Communicated through.
In addition, the foot opening communicates with a foot outlet for blowing conditioned air (mainly hot air) toward the lower body of the occupant (mainly the foot) through a foot duct.

The defroster 2 is installed inside an instrument panel located below the front window glass G in the vehicle interior of the vehicle. The defroster 2 has a rectangular tubular defroster duct 3 connected to the defroster opening of the air conditioning duct of the air conditioner unit 1 and a pair of wind direction changing ribs 5 installed in the air passage 4 of the defroster duct 3. doing.
The defroster duct 3 is integrally formed of a synthetic resin (for example, a thermoplastic resin such as polypropylene (PP)) together with a pair of wind direction changing ribs 5.
The defroster duct 3 extends from the defroster introduction port 11 communicating with the defroster opening of the air conditioning duct to the defroster outlet 12 opened on the surface of the instrument panel (upper surface near the front window glass) in the vehicle width direction (with respect to the vehicle forward direction). It is extended and formed so that the length in the left-right direction) extends in a fan shape.
The total length of the defroster outlet 12 in the vehicle width direction is set to about 2 to 3 times the total length of the defroster introduction port 11 in the vehicle width direction. The total length of the defroster introduction port 11 in the front-rear direction of the vehicle is set to about 2 to 3 times the total length of the defroster outlet 12 in the front-rear direction of the vehicle.

In addition, left and right wall portions (two side wall portions) disposed opposite to each other with the air passage 4 interposed therebetween are provided on both sides of the defroster duct 3 in the vehicle width direction. The defroster duct 3, particularly the two side wall portions, is arranged at the center in the height direction (vertical direction of the vehicle) or at the upper side in the drawing (downstream in the airflow direction) of the center portion. It has a curved portion 13 bent in the direction.
In addition, on both sides of the defroster duct 3 in the front-rear direction of the vehicle, front and rear wall portions disposed to face each other with the air passage 4 therebetween are provided. The defroster duct 3, particularly the front and rear wall portions, is bent in the vehicle front-rear direction on the upper side in the drawing (downstream in the air flow direction) from the center in the height direction (vertical direction of the vehicle). Part 14. For this reason, the conditioned air introduced from the air conditioner unit 1 through the defroster inlet 11 in the obliquely forward direction of the vehicle is changed in the direction of the airflow by the curved portion 14 to the obliquely rearward direction of the vehicle. It blows out toward the inner surface of the front window glass G.
In addition, a curved flow path that smoothly curves and extends in an arc shape from the outlet of the air passage 19 toward the defroster outlet 12 is formed inside the curved portion 14.

Here, in the defroster duct 3, particularly the front wall portion, a surface of the air passage wall surface of the defroster duct 3 along which the main flow of the conditioned air flows is defined as a first surface 21. The first surface 21 includes a concave curved surface that is a wall surface on the outer side in the bending direction of the bending portion 14 in the middle thereof. On both sides of the concave curved surface, that is, on the upstream side and the downstream side, flat surfaces are formed so as to continue from the concave curved surface.
Further, the defroster duct 3, particularly the rear wall portion, has a second surface 22 that faces the first surface 21 among the air passage wall surfaces of the defroster duct 3. The second surface 22 includes a convex curved surface that is a wall surface on the inner side in the bending direction of the bending portion 14 in the middle thereof. On both sides of the convex curved surface, that is, on the upstream side and the downstream side, a flat surface is formed so as to continue from the convex curved surface.

In addition, an air passage 4 extending from the defroster inlet 11 to the defroster outlet 12 is formed inside the defroster duct 3.
The air passage 4 of the defroster duct 3 is located at the upstream end 25 of the pair of wind direction changing ribs 5 on the side of the defroster inlet (an intermediate position between the defroster inlet 11 and the defroster outlet 12, for example, the central portion of the air passage 4). The air flow path 19 is provided on the upstream side in the air flow direction. Further, the air passage 4 of the defroster duct 3 has a pair of wind directions downstream of the position of the upstream end 25 of the pair of wind direction changing ribs 5 on the defroster introduction port side (for example, the central portion of the air passage 4). A central passage 31 formed between the change ribs 5 and two end passages 32 formed between the outer edge of each wind direction change rib 5 and the front and rear wall portions of the defroster duct 3 are provided.
The central passage 31 is extended so that the length in the vehicle width direction extends in a fan shape from the outlet of the air passage 19 to the defroster outlet 12. Further, the length of the vehicle in the front-rear direction of the central passage 31 is narrow from the outlet of the air passage 19 to the defroster outlet 12 so as to conflict with the length in the vehicle width direction extending from the outlet of the air passage 19 to the defroster outlet 12. It has become. The two end passages 32 are formed so that the length in the vehicle width direction extends in a fan shape from the curved portion 13 to the defroster outlet 12.

The pair of wind direction changing ribs 5 is provided only on the second surface 22 side , protrudes from the second surface 22 toward the first surface 21 side , and has a height that does not reach the first surface 21. Yes. Here, H1 in FIG. 1 represents the passage width (maximum value) of the curved passage of the air passage 4 of the defroster duct 3, that is, the passage width (maximum value: for example, about 15 to 20 mm) of the bending portion 14, Moreover, H2 in FIG. 1 represents the rib width (rib height, maximum value: about 15 to 17 mm, for example) of the wind direction changing rib 5. For this reason, a communication passage 24 that connects the central passage 31 and the end passage 32 is formed between the tops of the pair of wind direction changing ribs 5 and the first surface 21 of the defroster duct 3. The passage width of the communication passage 24 is about 3 to 5 mm at the widest place.

As shown in FIG. 2, the pair of wind direction changing ribs 5 are plate-shaped air guides (guide ribs) having curved surface portions that are curved more gently than the bending portion 13 in the bending direction of the two side wall portions of the defroster duct 3. It is. And a pair of wind direction change rib 5 is installed facing the central channel 31 across.
The pair of wind direction changing ribs 5 has a length in the vehicle width direction of the central passage 31 from the upstream end 25 on the defroster inlet side to the downstream end 26 on the defroster outlet side in the air passage 4 of the defroster duct 3. It is installed so as to spread in a fan shape.
Further, the pair of wind direction changing ribs 5 is located in the air passage 4 of the defroster duct 3 from an intermediate position between the defroster inlet 11 and the defroster outlet 12 (for example, the central portion of the air passage 4) to a position near the defroster outlet. It extends.

Further, the height of the pair of wind direction changing ribs 5 is gradually increased from a predetermined intermediate position 27 of the air passage 4 of the defroster duct 3 toward the upstream end 25 on the defroster inlet side. The height of the upstream end 25 on the defroster inlet side or the vicinity thereof is formed to be the highest in the entire extending direction of the wind direction changing rib 5.
The height of the pair of wind direction changing ribs 5 gradually decreases from a predetermined intermediate position 27 of the air passage 4 of the defroster duct 3 toward the downstream end 26 on the defroster outlet side. The height of the downstream end 26 on the side of the defroster outlet is formed to be the lowest in the entire extending direction of the wind direction changing rib 5. In this embodiment, the height of the downstream end 26 on the defroster outlet side is the same as the opening edge (second surface 22) of the defroster outlet 12.

[Operation of Example 1]
Next, the operation of the vehicle air conditioner of this embodiment, particularly the defroster 2, will be briefly described with reference to FIGS. Here, FIG. 3 is a graph showing the noise level with respect to the frequency change, FIG. 4 is a diagram showing the clear performance of the defroster, and FIG. 5 is a diagram showing the wind speed distribution of the blown air blown out from the defroster outlet. is there.

The conditioned air introduced from the defroster introduction port 11 guides each wind direction changing rib 5 so as to advance while spreading the conditioned air as a whole, so that the blowout distribution from the defroster outlet 12 becomes wide.
The main stream of the conditioned air introduced into the air passage 19 in the air passage 4 of the defroster duct 3 travels in the vicinity of the first surface 21, so that the rib passing through the communication passage 24 without changing the air direction by the air direction changing rib 5. Since the conditioned air other than the mainstream travels in the vicinity of the second surface 22, the conditioned air becomes a wind direction change flow that travels while changing the wind direction by the wind direction change rib 5. For this reason, no windless area is generated around the wind direction changing rib 5, and as a result, the process proceeds without lowering the wind speed.
Further, since air flows having different traveling directions, that is, a wind direction changing flow and a rib crossing flow, are blown out from the defroster outlet 12, no windless region, that is, a so-called blown air flow valley is generated downstream of the wind direction changing rib 5.
As described above, the blowing wind from the defroster outlet 12 can cover a wide range and far range (up to each corner of the front window glass G), and a uniform blowing distribution (wind speed distribution) can be obtained.

Further, since the air direction change rib 5 does not completely partition the air passage 19, the air blowing resistance by the air direction change rib 5 is also reduced, so that a decrease in the wind speed can be prevented from this point.
Further, in the present embodiment, the height downstream of the intermediate position 27 of the wind direction changing rib 5 gradually decreases toward the downstream, and the height of the most downstream end is zero, that is, the second surface 22 and Since they are formed to have the same height, no wind cracks occur downstream of the wind direction changing rib 5. For this reason, it is possible to reliably prevent the blowout air from generating a non-wind region, that is, a so-called valley of the blown air flow. In this embodiment, the defroster inlet 11 is formed narrow in the vehicle width direction, the defroster outlet 12 is formed wide in the vehicle width direction, the defroster inlet 11 is formed wide in the front-rear direction of the vehicle, and the defroster outlet is formed. Since the outlet 12 is formed narrow in the front-rear direction, and the opening area of the defroster inlet 11 and the opening area of the defroster outlet 12 are set to be substantially the same, the flow rate of the conditioned air is at the central passage 31 and the end of the air passage 4. Since it is possible to prevent as much as possible a situation in which the vehicle decelerates in the part passage 32, the blowing speed of the conditioned air can be maintained at a predetermined speed.
Therefore, it is possible to improve the performance (clear performance) for quickly and uniformly clearing the fog on the inner surface of the front window glass G.

[Features of Example 1]
The defroster 2 of the vehicle air conditioner of the present embodiment pays attention to the fact that wind noise and wind turbulence noise at the wind direction changing rib 5 is generated due to the influence of a high flow velocity, and the wind direction is at a position where the flow velocity is low (not the main flow portion) By arranging the change rib 5, both noise reduction and uniform wind speed distribution of the blown air are achieved.
That is, the conditioned air introduced from the defroster inlet 11 is uniformly guided over a wide range (wide angle) toward the defroster outlet 12 by the wind direction changing rib 5 arranged at a position where the flow velocity is low. The main stream of the conditioned air flowing along the surface 21 is blown upward as it is. Therefore, while maintaining a uniform and wide range of wind speed distribution at the defroster outlet 12, which is equivalent to that described in Patent Document 1, it is possible to prevent wind noise and turbulence generated by the wind direction changing rib 5 due to the mainstream wind, An increase in blowing noise radiated from the defroster outlet 12 into the vehicle compartment can be suppressed.

[Experimental result of Example 1]
Here, the result of having measured the noise level in the vicinity of the defroster outlet 12 by the defroster 2 of Example 1 is shown in FIG. In contrast to the experimental result (A) of the wind direction changing rib arrangement described in Patent Document 1, the experimental result (B) of the wind direction changing rib arrangement of Example 1 shows that noise is reduced in a frequency band of 1 kHz or higher. .
Next, the result of comparing the clear performance of the front window glass G in the defroster 2 of Example 1 with the clear performance of Patent Document 1 is shown in FIG. This is an experimental result obtained by measuring the clear distribution of the windshield G at a certain elapsed time. Similar to the clear performance of the experimental result (A) of the wind direction changing rib arrangement described in Patent Document 1, the first example. As for the experiment result (B) of the wind direction changing rib arrangement, there is little unevenness in the sunny distribution of the front window glass G, and almost uniform sunny performance can be ensured.
Next, FIG. 5 is a characteristic diagram showing the wind speed distribution of the blown air when coordinates are taken on the glass surface of the front window glass G in the defroster 2 of the first embodiment. A constant velocity line X in FIG. 5 represents a wind speed of about 2.0 m / sec, and a constant velocity line Y in FIG. 5 represents a wind speed of about 3.0 m / sec. In the defroster 2 according to the first embodiment, the constant velocity line X has a front velocity line X (see FIG. 9) and a wind speed distribution diagram (see FIG. 10) of the blown air described in Patent Document 1 and the front velocity distribution. It can be seen that the window glass G extends over the entire area.

[Effect of Example 1]
As described above, in the defroster 2 of the vehicle air conditioner of the present embodiment, the air conditioner is introduced from the defroster introduction port 11 into the air passage 4 of the defroster duct 3 and flows in the air passage 4 along the first surface 21. The main flow of the wind is relatively fast, but is blown from the defroster outlet 12 toward the front window glass G without being influenced by the wind direction changing rib 5 installed in the air passage 4 of the defroster duct 3. The
On the other hand, the conditioned air other than the mainstream has a slower flow velocity than the mainstream of the conditioned air, and even if it collides with or strikes the wind direction changing rib 5 installed in the air passage 4 of the defroster duct 3, Sound and wind turbulence are very small.

  Therefore, in the defroster 2 of the vehicle air conditioner of the present embodiment, as shown in FIGS. 1 and 2, the surface of the air passage wall surface of the defroster duct 3 along which the main flow of the conditioned air flows is the first surface. 21 and the surface facing the first surface 21 among the air passage wall surfaces of the defroster duct 3 is the second surface 22, the first surface 21 protrudes from the second surface 22 toward the first surface side. A wind direction changing rib 5 having a height that does not reach the height of the defroster duct 3 is provided in the air passage 4 of the defroster duct 3. As a result, it is possible to suppress the generation of wind noise and wind turbulence at the wind direction changing rib 5, so that it is possible to suppress an increase in blowing noise radiated from the defroster outlet 12 of the defroster duct 3 into the vehicle interior of the vehicle. it can. Therefore, compared with the prior art including the vehicle defroster device described in Patent Document 1, the passenger comfort can be improved.

Further, in the defroster 2 of the vehicle air conditioner of the present embodiment, the wind direction changing rib 5 protruding from the second surface 22 toward the first surface side is installed in the air passage 4 of the defroster duct 3. Even if it exists, since the height of the wind direction change rib 5 is a height that does not reach the first surface 21, the main flow of the conditioned air is not affected by the wind direction change rib 5 and passes through the air passage 4 of the defroster duct 3. Since it can pass, the ventilation resistance in the air passage 4 of the defroster duct 3 can be reduced.
Further, in the defroster 2 of the vehicle air conditioner according to the present embodiment, a pair of guide wind direction changing ribs 5 for blowing out blowing air having a wide and uniform wind speed over the entire surface of the front window glass G together with the defroster duct 3 is provided. In the air passage 4 of the duct 3, they are installed facing each other across the central passage 31, so as shown in FIG. 5, a uniform blowing air at a wide angle toward the inner surface of the front window glass G of the vehicle. The wind speed distribution can be obtained.
As a result, it is possible to achieve both reduction of the draft resistance in the air passage 4 of the defroster duct 3 and uniformization of the wind speed distribution of the blowing air blown from the defroster outlet 12, so that the entire inner surface of the front window glass G is clouded. A wide range can be cleared evenly and quickly.

  Therefore, in the air passage 4 of the defroster duct 3, the wind direction changes so as to protrude from the second surface 22 of the rear wall portion of the defroster duct 3 toward the first surface side of the front wall portion and not reach the first surface 21. With a very simple duct structure in which the rib 5 is installed, the ventilation resistance in the air passage 4 of the defroster duct 3 is reduced, the blowing noise radiated from the defroster outlet 12 of the defroster duct 3 is reduced, and the defroster outlet 12 can be made uniform in the wind speed distribution of the blown-out air blown out from 12.

In addition, since the main flow of the conditioned air introduced from the defroster introduction port 11 into the air passage 4 of the defroster duct 3 cannot be bent in the blowing direction by the wind direction changing rib 5, the wind noise in the air passage 4 of the defroster duct 3 is not generated. Reduction of pressure loss and reduction of pressure loss can be achieved, and it is possible to reduce the size of the defroster duct 3 with equivalent sunny performance, and to increase the mounting space for other components in the vehicle interior of the vehicle Can do.
Moreover, since the defroster duct 3 can be reduced in size, the material cost of the synthetic resin which is the material of the defroster duct 3 and the wind direction change rib 5 can be reduced.
Further, since the defroster duct 3 can be reduced in size, in particular, the air passage length of the defroster duct 3 can be shortened, the heat loss of the defroster duct 3 can be reduced. The sunny performance (sunny speed, sunny area) of the glass G can be improved.

FIG. 6 shows a second embodiment of the present invention, and is a diagram showing a defroster of a vehicle air conditioner.
In the defroster 2 of the present embodiment , the wind direction changing rib 5 is installed in the air passage 4 of the defroster duct 3 only on the second surface 22 side of the rear wall portion of the defroster duct 3. The wind direction changing rib 5 protrudes from the second surface 22 of the rear wall portion of the defroster duct 3 toward the first surface 21 side of the front wall portion, and has a height that does not reach the first surface 21. . The pair of wind direction changing ribs 5 are disposed to face each other with the central passage 31 in the air passage 4 of the defroster duct 3, as in the first embodiment. Similarly to the first embodiment, the pair of wind direction change ribs 5 is formed in the air passage 4 of the defroster duct 3 from the upstream end 25 on the defroster inlet side to the downstream end 26 on the defroster outlet side in the central passage 31. It is installed so that the length in the vehicle width direction extends in a fan shape.

Similarly to the first embodiment, the pair of wind direction changing ribs 5 is provided in the air passage 4 of the defroster duct 3 from a position intermediate between the defroster inlet 11 and the defroster outlet 12 (for example, the central portion of the air passage 4). It extends to a position near the exit.
Further, the height of the pair of wind direction changing ribs 5 is gradually increased from a predetermined intermediate position 27 of the air passage 4 of the defroster duct 3 toward the upstream end 25 on the defroster inlet side. The height of the upstream end 25 on the defroster inlet side or the vicinity thereof is formed to be the highest in the entire extending direction of the wind direction changing rib 5.
The height of the pair of wind direction changing ribs 5 is substantially the same from the predetermined intermediate position 27 of the air passage 4 of the defroster duct 3 to the downstream end 26 on the defroster outlet side.

As described above, in the defroster 2 of the vehicle air conditioner of the present embodiment, the second surface 22 is provided only in the air passage 4 of the defroster duct 3 on the second surface 22 side of the rear wall portion of the defroster duct 3. In the air passage 4 of the defroster duct 3 in the same manner as in the first embodiment, by installing the wind direction changing rib 5 that protrudes from the front wall toward the first surface 21 side and does not reach the first surface 21. It is possible to reduce the ventilation resistance, reduce the blowing noise radiated from the defroster outlet 12 of the defroster duct 3, and make the wind speed distribution of the blowing air blown from the defroster outlet 12 uniform. Therefore, the fog over the entire inner surface of the front window glass G can be cleared quickly and uniformly over a wide area.

FIG. 7 shows a third embodiment of the present invention, and is a diagram showing a defroster of a vehicle air conditioner.
In the defroster 2 of the present embodiment , the wind direction changing rib 5 is installed in the air passage 4 of the defroster duct 3 only on the second surface 22 side of the rear wall portion of the defroster duct 3. The wind direction changing rib 5 protrudes from the second surface 22 of the rear wall portion of the defroster duct 3 toward the first surface 21 side of the front wall portion, and has a height that does not reach the first surface 21. . The pair of wind direction changing ribs 5 are arranged to face each other across the central passage 31 in the air passage 4 of the defroster duct 3 as in the first and second embodiments. Similarly to the first and second embodiments, the pair of wind direction changing ribs 5 is a central passage extending from the upstream end 25 on the defroster inlet side to the downstream end 26 on the defroster outlet side in the air passage 4 of the defroster duct 3. It is installed so that the length of 31 in the vehicle width direction spreads in a fan shape.

Unlike the first and second embodiments, the pair of wind direction changing ribs 5 extends from a position near the defroster inlet to a position near the defroster outlet in the air passage 4 of the defroster duct 3.
Further, the height of the pair of wind direction changing ribs 5 is gradually increased from a predetermined intermediate position 27 of the air passage 4 of the defroster duct 3 toward the upstream end 25 on the defroster inlet side. The height of the upstream end 25 on the defroster inlet side is formed to be the highest in the entire extending direction of the wind direction changing rib 5.
The height of the pair of wind direction changing ribs 5 is substantially the same from the predetermined intermediate position 27 of the air passage 4 of the defroster duct 3 to the downstream end 26 on the defroster outlet side.

As described above, in the defroster 2 of the vehicle air conditioner of the present embodiment, the second surface 22 is provided only in the air passage 4 of the defroster duct 3 on the second surface 22 side of the rear wall portion of the defroster duct 3. from toward the first surface 21 side of the front wall portion protrudes, by installing the air direction changing rib 5 height does not reach the first surface 21, in the same manner as in example 1 and 2, the air passage of the defroster duct 3 4, reduction of blowing noise radiated from the defroster outlet 12 of the defroster duct 3, and uniforming of the wind speed distribution of the blowing air blown from the defroster outlet 12 can be achieved. Therefore, the fog over the entire inner surface of the front window glass G can be cleared quickly and uniformly over a wide area.

[Modification]
In this embodiment, a blower fan, an evaporator and a heater core are installed in the air conditioning duct of the air conditioning unit (air conditioning unit) 1. However, either one of the blower fan, the evaporator or the heater core is installed in the air conditioning duct of the air conditioning unit. May be installed.
In this embodiment, an example in which the vehicle defroster device of the present invention is applied to the defroster 2 that clears the fog on the inner surface of the front window glass G or defrosts is described. You may apply a defroster apparatus to the defroster which clears the cloudiness of the inner surface of a side window glass or a back window glass, or defrosts.
In this embodiment, the curved portions 13 and 14 are provided in the middle of the air passage 4 of the defroster duct 3, but the curved portion 13 may be eliminated.

  In the present embodiment, as shown in FIG. 2, the number (number) of the wind direction changing ribs 5 (guide ribs) installed in the air passage 4 of the defroster duct 3 is two (two). The number (number) of wind direction changing ribs 5 (guide ribs) installed in the three air passages 4 may be further increased. For example, the number of wind direction changing ribs 5 (guide ribs) may be three or four or more. In this case, the wind direction changing ribs 5 are (sequentially) installed at a predetermined interval (for example, at equal intervals) on the central portion side of the air passage 4 of the defroster duct 3 from the installation position of the pair of wind direction changing ribs 5 shown in FIG. I will do it.

It is sectional drawing which showed the defroster (Example 1). It is the perspective view which showed the vehicle air conditioner (Example 1). It is the graph which showed the noise level with respect to the change of a frequency (Example 1). It is the figure which showed the sunny performance of a defroster (Example 1). It is the figure which showed the wind speed distribution of the blowing wind blown out from the defroster blower outlet (Example 1). (Example 2) which is sectional drawing which showed the defroster. (Example 3) which is sectional drawing which showed the defroster. It is sectional drawing which showed the defroster apparatus for vehicles (prior art). It is the figure which showed the wind speed distribution of the blowing wind blown from the defroster blower outlet (conventional technique). It is the figure which showed the wind speed distribution of the blowing wind blown from the defroster blower outlet (conventional technique).

Explanation of symbols

G Front window glass 1 Air conditioner unit (air conditioner unit)
2 Defroster (Vehicle defroster device)
3 Defroster duct 4 Air passage 5 Wind direction change rib (guide rib)
DESCRIPTION OF SYMBOLS 11 Defroster inlet 12 Defroster outlet 21 1st surface 22 2nd surface 27 Predetermined intermediate position of air path of defroster duct 31 Central passage 32 End passage

Claims (9)

(A) A duct in which an air passage extending from the inlet to the outlet is formed inside, and has a curved portion in the middle of the air passage, and blows conditioned air from the outlet toward the window glass of the vehicle. When,
(B) In a vehicle defroster device including a rib that is installed in an air passage of the duct and changes a traveling direction of the conditioned air introduced from the introduction port.
Among the air passage wall surfaces of the duct , a concave surface that is a wall surface on the outer side in the bending direction of the curved portion, a surface along which the main flow of the conditioned air flows flows as a first surface, and among the air passage wall surfaces of the duct , Including a convex curved surface that is a wall surface in the bending direction of the bending portion, and when the surface facing the first surface is a second surface,
The rib is provided only on the second surface side , protrudes from the second surface toward the first surface side, and has a height that does not reach the first surface ;
A vehicular defroster device characterized in that the main stream of conditioned air travels without changing the wind direction by the ribs, and the conditioned air other than the main stream travels while changing the wind direction by the ribs . The vehicle defroster device according to claim 1,
The ribs are a pair of guide ribs for blowing out a wide range of uniform wind speeds over the entire surface of the window glass together with the duct,
The air passage of the duct has a central passage formed between the pair of guide ribs,
The pair of guide ribs are disposed opposite to each other across the central passage, and the vehicle defroster device is characterized in that The vehicle defroster device according to claim 2,
The pair of guide ribs are installed in the air passage of the duct so that the length in the vehicle width direction of the central passage extends in a fan shape from the upstream end on the inlet side to the downstream end on the outlet side. A vehicle defroster device. In the vehicle defroster device according to any one of claims 1 to 3,
The vehicle defroster device, wherein the rib extends from an intermediate position between the inlet and the outlet in the air passage of the duct to a position near the outlet. In the vehicle defroster device according to any one of claims 1 to 3,
The vehicle defroster device, wherein the rib extends from a position in the vicinity of the inlet to a position in the vicinity of the outlet in the air passage of the duct. In the vehicle defroster device according to any one of claims 1 to 5,
The vehicle defroster device, wherein the height of the rib gradually increases from a predetermined intermediate position of the air passage of the duct toward the upstream end on the inlet side. The vehicle defroster device according to claim 6,
The vehicle defroster device, wherein the rib is formed such that the height of the upstream end on the inlet side is the highest among the ribs. The vehicle defroster device according to any one of claims 1 to 7,
The vehicle defroster device according to claim 1, wherein the height of the rib gradually decreases from a predetermined intermediate position of the air passage of the duct toward the downstream end on the outlet side. The vehicle defroster device according to claim 8,
The vehicle defroster device, wherein the rib is formed so that a height of a downstream end on the outlet side is the lowest among the ribs.

Images