WO2016163193A1

WO2016163193A1 - Air discharge device

Info

Publication number: WO2016163193A1
Application number: PCT/JP2016/057230
Authority: WO
Inventors: 生田　晴樹; 加藤　慎也; 本村　博久
Original assignee: 株式会社デンソー
Priority date: 2015-04-08
Filing date: 2016-03-08
Publication date: 2016-10-13
Also published as: JP6424953B2; JPWO2016163193A1

Abstract

An air discharge device is provided with a discharge opening (11), a flow passage forming section (12), and an air flow deflection member (13). The flow passage forming section has a first wall (121) and a second wall (122) which faces the first wall (121). The part of the first wall, which faces the discharge opening, constitutes a guide wall (14) for guiding the direction of a high-speed air flow, which has been generated by the air flow deflection member, so that the high-speed air flow is directed from the second wall toward the first wall. The flow passage forming member has a protrusion (15) on the portion of the second wall, which is located downstream of the air flow deflection member in the air flow direction, the protrusion (15) protruding from the second wall toward the first wall and directing a low-speed air flow, which flows along the second wall, from the second wall toward the first wall.

Description

Air blowing device

Cross-reference to related applications

This application is based on Japanese Patent Application No. 2015-079399 filed on April 8, 2015, the contents of which are incorporated herein by reference.

The present disclosure relates to an air blowing device that blows out air.

Patent Document 1 discloses an air blowing device that blows air from a blowout port while bending the air along a guide wall using the Coanda effect. Specifically, the air blowing device includes a blowout port that blows air into the target space, a flow channel forming unit that forms an air flow channel that is connected to the upstream side of the air flow of the blower port, and a flow velocity in the air flow channel. And an airflow deflecting member that generates two airflows different from each other.

In the air flow path, the first flow path is between the air flow deflecting member and the first wall, and the second flow path is between the air flow deflecting member and the second wall. The airflow deflecting member is configured such that a high-speed airflow is generated in the first flow path and a low-speed airflow is generated in the second flow path. A part of the first wall on the outlet side bends the high-speed airflow from the first flow path generated by the airflow deflecting member along the wall surface, and changes the direction of the high-speed airflow to the second direction. A guide wall that guides a high-speed air flow is configured so as to be directed from the wall toward the first wall.

In this air blowing device, the high-speed airflow is bent along the guide wall by the Coanda effect, and the low-speed airflow is drawn into the high-speed airflow, so that the air flowing through the air flow path is bent and blown out from the air outlet. The bending angle can be increased.

JP 2014-210564 A

However, as a result of detailed studies by the inventors, it has been found that in the above-described conventional air blowing device, a part of the air flowing inside the flow path forming portion diffuses from the air outlet. For this reason, in the above-described conventional air blowing device, the air volume of the blown air blown from the air outlet in the direction from the second wall toward the first wall is smaller than the target air volume.

The present disclosure provides an air blowing device capable of increasing the amount of blown air blown from a blower outlet in a direction from the second wall toward the first wall as compared with the above-described conventional air blowing device. The purpose is to do.

According to one aspect of the present disclosure,
Air blower that blows out air
An air outlet that blows air into the target space;
A flow path forming section having a first wall and a second wall facing the first wall, and forming an air flow path connected to the upstream side of the air flow of the air outlet;
An air flow deflecting member that is provided in the air flow path and generates two air flows having different flow velocities in the air flow path;
In the air flow path, when the first flow path is between the air flow deflecting member and the first wall and the second flow path is between the air flow deflecting member and the second wall,
The airflow deflecting member is configured such that a relatively high speed airflow is generated in the first flow path and a low speed airflow is generated in the second flow path,
A portion of the first wall on the outlet side bends the high-speed airflow from the first flow path generated by the airflow deflecting member along the wall surface, and changes the direction of the high-speed airflow from the second wall. Configure a guide wall that guides the high-speed airflow so that it is in the direction toward the first wall,
The flow path forming unit projects from the second wall toward the first wall at a portion of the second wall on the downstream side of the airflow deflecting member with respect to the airflow deflecting member, and flows along the second wall. Has a projecting portion for directing the second wall from the second wall toward the first wall.

Here, unlike this viewpoint, in the case where there is no protrusion, the airflow on the side away from the second wall among the low-speed airflow from the second flow path is drawn into the high-speed airflow. Of the low-speed airflow from the second airflow, the airflow on the second wall side flows along the second wall and is not drawn into the high-speed airflow. For this reason, a low-speed air current will diffuse from the outlet.

On the other hand, according to this aspect, since the low-speed airflow flowing along the second wall is guided in the direction from the second wall toward the first wall by the protrusion, the entire low-speed airflow is It can be drawn into a high-speed air stream. Therefore, compared with the above-described conventional air blowing device, the low-speed air current drawn by the high-speed air current can be increased, and the blowing air blown from the air outlet in the direction from the second wall toward the first wall can be increased. The air volume can be increased.

According to another aspect of the present disclosure,
Air blower that blows out air
An air outlet that blows air into the target space;
A flow path forming section having a first wall and a second wall facing the first wall, and forming an air flow path connected to the upstream side of the air flow of the air outlet;
An air flow deflecting member that is provided in the air flow path and generates two air flows having different flow velocities in the air flow path;
In the air flow path, when the first flow path is between the air flow deflecting member and the first wall and the second flow path is between the air flow deflecting member and the second wall,
The air flow deflecting member generates a first air flow at a higher speed than the air flow in the second flow path because the cross-sectional area of the first flow path is smaller than the cross-sectional area of the second flow path. An air flow that is slower than the air flow in the flow path is generated in the second flow path,
A portion of the first wall on the outlet side bends the high-speed airflow from the first flow path generated by the airflow deflecting member along the wall surface, and changes the direction of the high-speed airflow from the second wall. Configure a guide wall that guides the high-speed airflow so that it is in the direction toward the first wall,
The flow path forming unit projects from the second wall toward the first wall at a portion of the second wall on the downstream side of the airflow deflecting member with respect to the airflow deflecting member, and flows along the second wall. Has a projecting portion for directing the second wall from the second wall toward the first wall.

Also in this aspect, since the low-speed airflow flowing along the second wall is guided in the direction from the second wall toward the first wall by the protrusion, the entire low-speed airflow is drawn into the high-speed airflow. be able to. Therefore, compared with the above-described conventional air blowing device, the low-speed air current drawn by the high-speed air current can be increased, and the blowing air blown from the air outlet in the direction from the second wall toward the first wall can be increased. The air volume can be increased.

According to yet another aspect of the present disclosure,
The air outlet has a direction in which the first wall and the second wall are opposed to each other as a vertical direction, and a direction intersecting the direction in which the first wall and the second wall are opposed to each other is a horizontal direction.
The protrusion is formed in the entire area of the second wall in the lateral direction of the air outlet,
The amount of protrusion of the projecting portion of at least one of both ends of the second wall in the lateral direction of the air outlet is the amount of protrusion of the projecting portion at a site inside the both ends of the second wall in the lateral direction of the air outlet. It is characterized by being larger than.

Here, at the lateral end of the air outlet, a low-speed airflow flows along the side wall connecting the first wall and the second wall in the flow path forming part. For this reason, when the amount of protrusion of the projecting portion is uniform in the entire region from the one end to the other end of the second wall in the lateral direction of the air outlet, the lateral end of the air outlet is in the lateral direction of the air outlet. Compared with the inner portion of the end portion, the low-speed airflow that merges with the high-speed airflow is reduced.

On the other hand, in this aspect, the protrusion amount at at least one of both end portions of the second wall in the lateral direction of the blower outlet is set as the protrusion amount at the inner portion of the both ends of the second wall in the lateral direction of the blower outlet. Is bigger than. Thereby, at least one of the both ends of the blower outlet in the lateral direction can increase the low-speed airflow that merges with the high-speed airflow, and the amount of blown air blown from the blower outlet in the direction from the second wall toward the first wall can be reduced. Can be increased.

According to yet another aspect of the present disclosure,
The air outlet has a direction in which the first wall and the second wall are opposed to each other as a vertical direction, and a direction intersecting the direction in which the first wall and the second wall are opposed to each other is a horizontal direction.
The projecting portion is formed at least at an end portion in the lateral direction of the second wall and a portion closer to the center than the end portion in the lateral direction of the second wall,
The protruding amount of the protruding portion at the end portion is larger than the protruding amount of the protruding portion at the central portion.

Here, at the lateral end of the air outlet, a low-speed airflow flows along the side wall connecting the first wall and the second wall in the flow path forming part. For this reason, when the protruding amount of the protruding portion at the end portion is the same as the protruding amount of the protruding portion at the central portion, the lateral end portion of the air outlet is more central than the lateral end portion of the air outlet. Compared with the portion on the side, the low-speed airflow that merges with the high-speed airflow is reduced.

On the other hand, according to the present aspect, the low-speed airflow that merges with the high-speed airflow can be increased at the lateral end of the air outlet, and the air outlet is directed in the direction from the second wall toward the first wall. The air volume of the blown-out air that is blown out can be further increased.

It is sectional drawing which shows the vehicle mounting state of the air blowing apparatus and air-conditioning unit in 1st Embodiment. It is a top view which shows arrangement | positioning of the blower outlet in FIG. 1 in a vehicle interior. It is an enlarged view of the blower outlet on the driver's seat side in FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3 showing the air blowing device in FIG. 1. It is a schematic diagram which shows the structure of the air conditioning unit in FIG. It is sectional drawing of the air blowing apparatus in FIG. 1 at the time of face mode. It is sectional drawing of the air blowing apparatus in FIG. 1 at the time of a defroster mode. It is sectional drawing of the air blowing apparatus of the comparative example 1. It is sectional drawing of the principal part of the air blowing apparatus in 1st Embodiment. It is a figure which shows the relationship between the protrusion amount of a protrusion part, bending angle (theta) 2 of a low speed airflow, and the blowing pressure loss of a blowing wind. It is a top view of the blower outlet of the air blowing apparatus in 2nd Embodiment. FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. FIG. 12 is a cross-sectional view taken along line XIV-XIV in FIG. 11. FIG. 12 is an enlarged view of a region XV in FIG. 11. FIG. 4 is a cross-sectional view taken along line XVI-XVI in FIG. 3. It is sectional drawing of the air blowing apparatus in 3rd Embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other will be described with the same reference numerals. Moreover, the arrow which shows up, down, front, back, left, right etc. in each figure has shown each direction in a vehicle mounting state.

(First embodiment)
In the present embodiment, the air blowing device according to the present disclosure is applied to an air outlet and a duct of an air conditioning unit mounted in front of the vehicle.

As shown in FIG. 1, the air blowing device 10 includes a blowout port 11, a duct 12, and an airflow deflecting door 13. The blower outlet 11 blows air into the vehicle interior space as a target space. The blower outlet 11 is located on the windshield 2 side of the upper surface portion 1a of the instrument panel 1. In other words, the blower outlet 11 is located in the range which overlaps with the windshield 2 among the upper surface parts 1a, when the windshield 2 is projected in parallel with the up-down direction with respect to the upper surface part 1a. The duct 12 connects the air outlet 11 and the air conditioning unit 20. The airflow deflection door 13 is located in the duct 12. The air conditioning unit 20 is disposed inside the instrument panel 1.

The instrument panel 1 is an instrument panel provided in front of the passenger compartment, and has an upper surface portion 1a and a design surface portion (that is, a front surface portion) 1b. The instrument panel 1 refers to the entire panel located in front of the front seat in the passenger compartment, including not only the part where the instruments are arranged, but also the part that houses the audio and the air conditioner.

As shown in FIG. 2, the air outlets 11 are arranged at two locations on the front of the driver seat 4 a and the front of the passenger seat 4 b of the right-hand drive vehicle. Below, although the blower outlet 11 of the front of the driver's seat 4a is demonstrated, the blower outlet 11 arrange | positioned in front of the passenger seat 4b is the same as the blower outlet 11 of the front of the driver's seat 4a.

The air outlet 11 is elongated in the left-right direction. That is, the longitudinal direction of the opening shape of the air outlet 11 is along the left-right direction. The length of the air outlet 11 in the left-right direction is longer than the length of the seat 4 in the left-right direction. In addition, the length of the left-right direction of the blower outlet 11 may be equal to or shorter than the length of the seat 4 in the left-right direction.

As shown in FIG. 3, the air outlet 11 has a flat shape having two

long sides

11 a and 11 b and extending in one direction (that is, the left-right direction).

Specifically, the opening

edges

11a, 11b, 11c, and 11d of the air outlet 11 have a pair of

long sides

11a and 11b and a pair of

short sides

11c and 11d on the surface of the upper surface portion 1a. The pair of

long sides

11a and 11b are located on the rear side and the front side, respectively, and extend in the left-right direction. The pair of

short sides

11c and 11d connects the ends of the pair of

long sides

11a and 11b. In the present embodiment, the pair of

long sides

11a and 11b are curved so as to be convex from the rear to the front.

The air outlet 11 switches the three blowing modes of the defroster mode, the upper vent mode, and the face mode by the air flow deflecting door 13 shown in FIG. 1, and blows out the temperature-adjusted air into the vehicle interior space as the target space. Here, in the defroster mode, air is blown out toward the windshield 2 to clear the cloudiness of the window. In the face mode, air is blown out toward the upper half of the front seat occupant 5. In the upper vent mode, air is blown out upward than in the face mode, and the rear seat passenger is blown.

As shown in FIG. 1, the air outlet 11 is constituted by an opening formed at the end of the duct 12. In other words, the duct 12 is connected to the air outlet 11. The duct 12 is a flow path forming unit that forms therein an air flow path connected to the air flow upstream side of the air outlet 11. The duct 12 is made of a resin that is configured separately from the air conditioning unit 20, and is connected to the air conditioning unit 20. The end of the duct 12 on the upstream side of the air flow is connected to the defroster / face opening 30 of the air conditioning unit 20. Therefore, the duct 12 forms an air flow path through which air blown from the air conditioning unit 20 flows. The duct 12 may be formed integrally with the air conditioning unit 20.

As shown in FIG. 4, the duct 12 has a first wall (that is, the rear wall) 121 located on the rear side and a second wall (that is, the front wall) 122 located on the front side. The first wall 121 and the second wall 122 face each other in the front-rear direction. Therefore, in the present embodiment, the front-rear direction corresponds to “the direction in which the first wall 121 and the second wall 122 face each other”. Further, the left-right direction corresponds to the “direction intersecting the direction in which the first wall 121 and the second wall 122 face each other”. The direction from the front to the rear corresponds to the “direction from the second wall 122 to the first wall 121”. The direction from the rear to the front corresponds to the “direction from the first wall 121 to the second wall 122”.

The air flow downstream end of the first wall 121 constitutes the long side 11a on the rear side of the opening edge of the air outlet 11 shown in FIG. In more detail, the edge part of the guide wall 14 mentioned later comprises the long side 11a of the blower outlet 11. FIG.

Moreover, the air flow downstream end of the second wall 122 constitutes the long side 11b on the front side of the opening edge of the air outlet 11 shown in FIG. More specifically, the distal end of the protruding portion 15 described later constitutes the long side 11 b of the air outlet 11.

The airflow deflecting door 13 is an airflow deflecting member that generates two airflows having different flow velocities in the duct 12. The airflow deflection door 13 changes the speed of each airflow in the first flow path 12a and the second flow path 12b inside the duct 12. The first flow path 12 a is formed between the airflow deflecting door 13 and the first wall 121 of the duct 12. The second flow path 12 b is formed between the airflow deflecting door 13 and the second wall 122 of the duct 12.

In this embodiment, a butterfly door is adopted as the airflow deflecting door 13. The butterfly door includes a plate-like door main body and a rotary shaft provided at the center of the door main body. The rotation axis is arranged in parallel to the longitudinal direction of the air outlet 11 (that is, the vehicle left-right direction). For this reason, the airflow deflection door 13 rotates with the longitudinal direction of the air outlet 11 as the axis. The vehicle front-rear direction length of the door main body is smaller than the width of the duct 12 in the vehicle front-rear direction. For this reason, even if the airflow deflecting door 13 is leveled, the duct 12 is not closed. The rotation axis is located on the vehicle rear side with respect to the center of the duct 12 in the vehicle front-rear direction. This is because the cross-sectional area of the first flow path 12a is reduced to form a high-speed air flow in the first flow path 12a.

Further, the first wall 121 of the duct 12 has a guide wall 14 at a portion on the outlet 11 side. The guide wall 14 is continuous with the upper surface portion 1 a of the instrument panel 1. The guide wall 14 guides the high-speed airflow so that the direction of the high-speed airflow is directed backward from the outlet 11 by bending the high-speed airflow described later along the wall surface by the Coanda effect. In other words, the guide wall 14 guides the air flowing through the air flow path so as to blow out from the outlet in the direction from the second wall 122 toward the first wall 121. By the guide wall 14, the flow path width in the air outlet 11 side portion of the duct 12, that is, the interval between the first wall 121 and the second wall 122 is widened toward the downstream side of the air flow. In this embodiment, the guide wall 14 is curved so that the wall surface is convex toward the inside of the duct 12. In other words, the guide wall 14 is curved so as to be away from the second wall 122 from the portion 121a on the upstream side of the air flow with respect to the portion on the outlet 11 side of the first wall 121.

The duct 12 has a protruding portion 15 that protrudes from the second wall 122 toward the first wall 121. This protrusion 15 is for directing a low-speed airflow flowing along the second wall 122 described later in a direction from the second wall 122 toward the first wall 121.

The protrusion 15 is located at the most downstream part of the air flow in the second wall 122. The protrusion 15 has a flat plate shape, and the upper surface of the protrusion 15 and the surface of the upper surface 1 a of the instrument panel 1 are flush with each other. The front end of the projecting portion 15 is located on the front side (that is, on the second wall 122 side) of the airflow deflecting door 13 in the first state in the front-rear direction. The protrusion 15 is formed integrally with the second wall 122. The protruding portion 15 may be formed as a separate body from the second wall 122.

Further, as shown in FIG. 3, the protrusion 15 is formed in the second wall 122 in the entire region in the left-right direction of the air outlet 11. In the present embodiment, the protrusion amount L1 of the protrusion 15 is uniform over the entire area of the air outlet 11 in the left-right direction. In FIG. 3, the position of the wall surface of the portion of the second wall 122 on the upstream side of the air flow from the protruding portion 15 is indicated by a broken line. The same applies to FIG. 11 described later.

As shown in FIG. 5, the air conditioning unit 20 has an air conditioning casing 21 that constitutes an outer shell. The air conditioning casing 21 constitutes an air passage that guides air to the vehicle interior, which is the air conditioning target space. In the most upstream part of the air flow of the air conditioning casing 21, an inside air inlet 22 for sucking air inside the vehicle interior (that is, inside air) and an outside air inlet 23 for sucking air outside the vehicle compartment (ie, outside air) are formed. . Further, a suction port opening / closing door 24 for selectively opening / closing the inside air suction port 22 and the outside air suction port 23 is provided at the most upstream part of the air flow of the air conditioning casing 21. The inside air inlet 22, the outside air inlet 23, and the inlet opening / closing door 24 constitute an inside / outside air switching unit that switches the intake air into the air conditioning casing 21 between the inside air and the outside air. The operation of the inlet opening / closing door 24 is controlled by a control signal output from a control device (not shown).

A blower 25 as a blower that blows air into the passenger compartment is disposed on the downstream side of the air flow of the suction opening / closing door 24. The blower 25 of the present embodiment is an electric blower that drives the centrifugal multiblade fan 25a by an electric motor 25b that is a drive source, and the number of rotations (that is, the amount of blown air) is determined by a control signal output from a control device (not shown). Be controlled.

An evaporator 26 that functions as a cooler for cooling the air blown by the blower 25 is disposed on the downstream side of the air flow of the blower 25. The evaporator 26 is a heat exchanger that exchanges heat between the refrigerant flowing through the inside and the air, and constitutes a vapor compression refrigeration cycle together with a compressor, a condenser, an expansion valve, and the like (not shown).

A heater core 27 that functions as a heater for heating the air cooled by the evaporator 26 is disposed on the downstream side of the air flow of the evaporator 26. The heater core 27 of the present embodiment is a heat exchanger that heats air using the cooling water of the vehicle engine as a heat source. The evaporator 26 and the heater core 27 constitute a temperature adjusting unit that adjusts the temperature of the air blown into the vehicle interior.

Further, a cold air bypass passage 28 is formed on the downstream side of the air flow of the evaporator 26 to allow the air after passing through the evaporator 26 to flow around the heater core 27. Here, the temperature of the air mixed on the downstream side of the air flow of the heater core 27 and the cold air bypass passage 28 varies depending on the air volume ratio of the air passing through the heater core 27 and the air passing through the cold air bypass passage 28. For this reason, an air mix door 29 is arranged on the downstream side of the air flow of the evaporator 26 and on the inlet side of the heater core 27 and the cold air bypass passage 28. The air mix door 29 continuously changes the air volume ratio of the cold air flowing into the heater core 27 and the cold air bypass passage 28, and functions as a temperature adjusting unit together with the evaporator 26 and the heater core 27. The operation of the air mix door 29 is controlled by a control signal output from the control device.

A defroster / face opening 30 and a foot opening 31 are provided at the most downstream part of the air flow of the air conditioning casing 21. The defroster / face opening 30 is connected to the air outlet 11 provided in the upper surface 1 a of the instrument panel 1 through the duct 12. The foot opening 31 is connected to the foot outlet 33 via the foot duct 32.

A defroster / face door 34 for opening and closing the defroster / face opening 30 is disposed on the upstream side of the air flow of the defroster / face opening 30. A foot door 35 that opens and closes the foot opening 31 is disposed on the upstream side of the air flow of the foot opening 31. The defroster / face door 34 and the foot door 35 are blowing mode doors for switching the blowing state of the air blown into the vehicle interior.

The airflow deflecting door 13 operates in conjunction with these blowing

mode doors

34 and 35 so as to be in a desired blowing mode. The operations of the air flow deflecting door 13 and the blowing

mode doors

34 and 35 are controlled by a control signal output from the control device. Note that the airflow deflecting door 13 and the blowing

mode doors

34 and 35 can be changed in position by a passenger's manual operation.

For example, when a foot mode that blows out from the foot outlet 33 to the feet of the occupant is executed as the blowing mode, the defroster / face door 34 closes the defroster / face opening 30 and the foot door 35 opens the foot opening 31. On the other hand, when any one of the defroster mode, the upper vent mode, and the face mode is executed as the blowing mode, the defroster / face door 34 opens the defroster / face opening 30 and the foot door 35 closes the foot opening 31. . Furthermore, in this case, the position of the airflow deflecting door 13 is a position corresponding to a desired blowing mode.

In the present embodiment, the velocity of each of the airflow passing through the first flow path 12a and the airflow passing through the second flow path 12b is changed by rotating the airflow deflecting door 13. Thereby, the blowing angle θ1 is changed. The blow angle θ1 here is an angle formed by the blow direction with respect to the vertical direction as shown in FIG. Incidentally, the vertical direction is used as a reference because the direction of the airflow passing between the portion 121a upstream of the guide wall 14 and the second wall 122 of the first wall 121 from the guide wall 14 is from bottom to top. Because it is the direction to go.

Specifically, when the blowing mode is the face mode, the door angle φ of the airflow deflecting door 13 is set to an angle shown in FIG. That is, the door main body portion of the airflow deflecting door 13 is tilted so that the distance between the door main body portion and the first wall 121 decreases as the air flows in the air flow direction. Thereby, the cross-sectional area of the 1st flow path 12a becomes smaller than the cross-sectional area of the 2nd flow path 12b. Relatively, a high-speed air flow F1 is generated in the first flow path 12a, and a low-speed air flow F2 is generated in the second flow path 12b. That is, the first air flow F1 that is faster than the air flow in the second flow path 12b is generated in the first flow path 12a, and the air flow F2 that is lower in speed than the air flow in the first flow path 11a is generated in the second flow path 12b. It becomes a state. The cross-sectional area of the first flow path 12a means an area of a cross section that crosses the air flow of the first flow path 12a. The cross-sectional area of the second flow path 12b means an area of a cross section that crosses the air flow of the first flow path 12a.

In the first state, the high-speed air flow F1 flows along the guide wall 14 by the Coanda effect and is bent backward. At this time, a negative pressure is generated on the downstream side of the airflow deflection door 13 by the flow of the high-speed airflow F1. For this reason, the low-speed airflow F2 is drawn to the downstream side of the airflow deflection door 13, and merges with the high-speed airflow F1 while being bent toward the high-speed airflow F1. Thereby, the largest bending angle (theta) when the air which flows through the inside of the duct 12 is bent by the vehicle rear side and is blown off from the blower outlet 11 can be enlarged. As a result, air whose temperature has been adjusted by the air conditioning unit 20, for example, cold air, is blown out from the air outlet 11 toward the upper body of the front seat occupant.

At this time, the occupant manually adjusts the position of the airflow deflection door 13 (that is, the door angle), or the control device automatically adjusts the speed difference between the high-speed airflow F1 and the low-speed airflow F2. be able to. As the speed difference between the high-speed airflow F1 and the low-speed airflow F2 increases, the bending angle of the air blown out from the air outlet 11 increases. Thereby, the blowing angle θ in the face mode can be set to an arbitrary angle.

In this face mode, air is blown out from the blowout port 11 toward the occupant 5 as indicated by the arrow in FIG.

Here, since the air flows from the air outlet 11 bent along the guide wall 14 along the guide wall 14, the opening edges 11 a, 11 b, 11 c constituting the air outlet 11 are provided. It is determined by the shape of the long side 11a connected to the guide wall 14 among 11d. That is, the perpendicular direction of the long side 11a connected to the guide wall 14 in the opening edge portion is the air blowing direction. The normal direction of the long side 11a is the normal direction of the long side 11a when the long side 11a is linear, and the normal direction of the tangent line of the long side 11a when the long side 11a is curved. That is.

In the present embodiment, as shown in FIG. 3, the long side 11 a connected to the guide wall 14 in the opening edge portion constituting the air outlet 11 has a convex shape from the rear to the front. The blown air can be converged, and the blown air can be concentrated on the occupant 5.

When the blowing mode is the defroster mode, the door angle of the airflow deflecting door 13 is the angle shown in FIG. That is, the door main body portion of the airflow deflecting door 13 is tilted so that the distance between the door main body portion and the second wall 122 decreases in the air flow direction. As a result, the first flow path 12a and the second flow path 12b are in the second state in which the airflows F3 and F4 having the same or similar speed are generated. In the second state, the airflows F3 and F4 flow upward. For this reason, the air whose temperature is adjusted by the air conditioning unit 20, for example, warm air, is blown out from the air outlet 11 toward the windshield 2.

When the blowing mode is the defroster mode, the direction of the air flow deflecting door 13 may be the direction in which the door main body is parallel to the vertical direction. At this time, the airflow in the first flow path 12a and the airflow in the second flow path 12b have the same speed.

Although not shown, when the blowing mode is the upper vent mode, the direction of the airflow deflecting door 13 is the direction between the face mode and the defroster mode. In this case as well, the first state is entered, but since the high-speed air flow F1 is slower than in the face mode, the blowing angle θ1 is smaller than in the face mode. As a result, air whose temperature has been adjusted by the air conditioning unit 20, for example, cold air, is blown out from the air outlet 11 toward the rear seat occupant.

Next, main features of this embodiment will be described.

(1) In the air blowing device 10 of this embodiment, the protrusion 15 is provided on the second wall 122 of the duct 12.

Here, the air blowing device of Comparative Example 1 is shown in FIG. The air blowing device of Comparative Example 1 corresponds to the above-described conventional air blowing device, and differs from the air blowing device 10 of the present embodiment only in that the protrusion 15 is not provided.

As shown in FIG. 8, in the air blowing device of Comparative Example 1, when the airflow deflecting door 13 is in the first state, the low-speed airflow F2 from the second flow path 12b is on the side away from the second wall 122. The airflow F2a is drawn into the high-speed airflow F1. However, the airflow F2b on the side close to the second wall 122 in the low-speed airflow F2 flows along the second wall 122, and thus is not drawn into the high-speed airflow F1. For this reason, the low-speed air flow F 2 b diffuses from the outlet 11.

On the other hand, in the air blowing device 10 of the present embodiment, as shown in FIG. 6, when the airflow deflection door 13 is in the first state, the low-speed airflow that flows along the second wall 122 by the protrusion 15. F2 can be guided in the direction from the second wall 122 toward the first wall 121. For this reason, the entire low-speed air flow F2 can be drawn into the high-speed air flow F1. Therefore, according to the air blowing device 10 of this embodiment, compared with the air blowing device of the comparative example 1, the low-speed air flow F1 drawn into the high-speed air flow F1 can be increased, and the blower outlet 11 toward the vehicle rear side. It is possible to increase the air volume of the blown air blown out from.

The protrusion amount of the protrusion 15 is preferably set as follows as shown in FIGS.

FIG. 10 shows the bending angle θ2 and the blowing pressure loss of the low-speed air flow F2 with respect to the ratio (ie, L1 / L2) between the protrusion amount L1 of the protrusion 15 and the distance L2 between the protrusion 15 and the air flow deflecting door 13 shown in FIG. It is a figure which shows the relationship. This is an experimental result in which the inventor measured the bending angle θ2 and the blowing pressure loss using the air blowing device 10 of the present embodiment in which the protruding amount L1 of the protruding portion 15 has various sizes. The blowout pressure loss is the pressure loss of the blown air from the blowout port 11.

The protrusion amount L1 of the protrusion 15 is the distance from the surface of the second wall 122 to the tip of the protrusion 15 in the front-rear direction. More details are as follows. When the airflow deflection door 13 is in the first state, the position of the second wall 122 that is the shortest distance from the airflow deflection door 13 is set as the reference position Ps. At this time, the distance from the reference position Ps of the second wall 122 in the front-rear direction to the tip of the protruding portion 15 is the protruding amount L1.

The distance L2 between the protrusion 15 and the airflow deflection door 13 is the distance in the front-rear direction between the tip of the protrusion 15 and the airflow deflection door 13. More specifically, this is the distance in the front-rear direction between the end of the airflow deflecting door 13 that is closest to the second wall 122 and the tip of the protruding portion 15 when the airflow deflecting door 13 is in the first state.

When the protrusion amount L1 is 0, the ratio of L1 to L2 (ie, L1 / L2) is 0. As the protrusion amount L1 increases from 0, the ratio of L1 to L2 (ie, L1 / L2) also increases. .

As shown in FIG. 10, as the ratio of L1 to L2 (ie, L1 / L2) increases, the bending angle θ2 of the low-speed airflow F2 increases, but the blowout pressure loss increases. Here, in the experiments by the present inventors, it has been confirmed that the bending angle θ2 of the low-speed air flow F2 may be 70 degrees or more in order to join the low-speed air flow F2 to the high-speed air flow F1. Moreover, if the blowout pressure loss is 20 Pa or less, it has been confirmed that the influence of the reduction in the blown air volume is small.

Therefore, the protrusion amount L1 of the protrusion 15 is set so as to satisfy the following formula (1).

1.5 ≦ L1 / L2 ≦ 1.7 (1)
Thereby, compared with the air blowing apparatus of the comparative example 1, the air volume of the blowing wind which blows off from the blower outlet 11 toward the vehicle rear can be increased.

(2) In the air blowing device 10 of this embodiment, the protrusion 15 is located in the most downstream portion of the air flow in the second wall 122. And the upper surface of the protrusion part 15 and the surface of the upper surface part 1a of the instrument panel 1 are continuing on the same plane. In this case, the projecting portion 15 constitutes a part of the upper surface portion 1 a, and the tip of the projecting portion 15 constitutes the opening edge portion 11 b of the outlet 11.

For this reason, according to the air blowing apparatus 10 of this embodiment, compared with the air blowing apparatus of the comparative example 1, the opening width in the front-back direction of the blower outlet 11 can be made small, and the designability of the instrument panel 1 is improved. it can.

(Second Embodiment)
The air blowing device 10 of the present embodiment is a device in which, in the air blowing device 10 of the first embodiment, the protruding amount L1 of the protruding portion 15 at both ends in the left-right direction of the air outlet 11 is increased. This is the same as the air blowing device 10 of the first embodiment. In addition, the front-back direction of the blower outlet 11 is the vertical direction of the blower outlet 11, and the left-right direction of the blower outlet 11 is the horizontal direction of the blower outlet 11.

As shown in FIG. 11, also in this embodiment, the protrusion 15 is formed in the second wall 122 in the entire region in the left-right direction of the air outlet 11. As can be seen by comparing FIGS. 12 and 13 and FIG. 14, in this embodiment, the protrusion amounts L1a and L1b of the

protrusions

15a and 15b at both ends of the second wall 122 in the left-right direction of the outlet 11 are It is larger than the projecting amount L1c of the projecting portion 15c on the center side than both end portions of the second wall 122 in the left-right direction of the air outlet 11.

Furthermore, as shown in FIG. 11, the protrusion amount L1c of the protrusion 15 c on the center side with respect to the both ends of the second wall 122 in the left-right direction of the outlet 11 is more central than the ends of the outlet 11 in the left-right direction. Uniform throughout the entire range. On the other hand, the protrusions L1a and L1b of the

protrusions

15a and 15b at both ends of the second wall 122 in the left and right direction of the air outlet 11 gradually increase from the center side to the end of the air outlet 11 in the left and right direction. ing.

For this reason, the distance between the sides 11b1 and 11b2 formed by the tips of the

protrusions

15a and 15b and the long side 11a on the rear side of the opening edge of the outlet 11 is the side 11b3 and the outlet formed by the tip of the protrusion 15c. Compared with the space | interval with the long side 11a of the back side of 11 opening edge parts, it becomes narrow gradually as it goes to the end from the center side in the left-right direction of the blower outlet 11. FIG. That is, at both ends in the left-right direction of the air outlet 11, the opening width in the front-rear direction of the air outlet 11 is gradually narrowed from the center side in the left-right direction of the air outlet 11 toward the end.

Further, the side 11b3 formed by the tip of the protruding portion 15c is curved along the long side 11a of the air outlet 11.

On the other hand, the side 11b1 formed by the tip of the protruding portion 15a is linear. Then, as shown in FIG. 15, when the virtual straight line VL1 perpendicular to the side 11b1 is extended to the blowing direction side from the outlet 11, the virtual straight line Vl1 passes through the target point P1 and the side 11b1 The direction is set. In FIG. 15, the virtual straight line VL1 extends from the center point of the side 11b1, but may extend from any point of the side 11b1.

The side 11b2 formed by the tip of the protruding portion 15b is also a straight line similar to the side 11b1. However, the angle with respect to the left-right direction is different between the side 11b1 and the side 11b2. Therefore, in this embodiment, the front-end | tip shape of the protrusion part 15a and the protrusion part 15b is asymmetrical.

In the present embodiment, only the protrusion amount L1c of the protrusion 15c may be set so as to satisfy the formula (1) described in the first embodiment.

Next, main features of this embodiment will be described.

(1) In the present embodiment, the protruding amounts L1a and L1b of the protruding

portions

15a and 15b at the both ends in the left and right direction of the second wall 122 are in the regions inside the both ends in the left and right direction of the second wall 122. It is larger than the protrusion amount L1c of the protrusion 15c.

Here, as in the first embodiment, the case where the protrusion amount L1 of the protrusion 15 is uniform in the entire left and right direction of the second wall 122 will be described. In this case, at both ends in the left and right direction of the air outlet 11, as shown in FIG. 16, in the face mode in which the air current deflecting door 13 is set to the first state, the low speed air current F 2 is converted into the

short sides

11 c and 11 d Flows along the

side walls

123 and 124 of the duct 12. A low-speed air flow F 2 flowing along the

side walls

123 and 124 is blown upward from the air outlet 11. For this reason, compared with the site | part inside the both ends of the left-right back of the blower outlet 11, the low-speed airflow F2 which merges with the high-speed airflow F1 will decrease in the both ends of the blower outlet 11 right and left back.

On the other hand, as shown in FIGS. 12 and 13, in the present embodiment, the protruding amounts L1a and L1b of the protruding

portions

15a and 15b are increased at both ends of the outlet 11 in the left-right direction. For this reason, the low-speed airflow F 2 flowing near the

side walls

123 and 124 of the duct 12 can be directed to the first wall 121. Accordingly, the low-speed air flow F2 that merges with the high-speed air flow F1 can be increased at both ends in the left-right direction of the air outlet 11, and the air volume of the air blown out from the air outlet 11 in the direction from the front to the rear is further increased. Can do.

(2) In the present embodiment, the protruding amounts L1a and L1b of the protruding

portions

15a and 15b at both ends in the left and right direction of the second wall 122 gradually increase from the center side in the left and right direction toward the end. . The sides 11b1 and 11b2 formed by the tips of the

protrusions

15a and 15b are linear. The perpendicular direction of the sides 11b1 and 11b2 faces the face of the occupant 5 that is the target point P1.

Here, in the face mode in which the airflow deflecting door 13 is in the first state, the perpendicular direction of the sides 11b1 and 11b2 is the flow direction of the low-speed airflow F2. For this reason, in this embodiment, the directions of the

sides

11b and 11c are set so that the low-speed air flow F2 is directed to the target point P1.

As a result, as shown in FIG. 11, the low-speed air flow F 2 flowing through both ends in the left-right direction of the outlet 11 can be directed to the face of the occupant 5 in the face mode. As a result, the high-speed airflow F1 where the low-speed airflow F2 merges can also be guided to the face of the occupant 5. This has been confirmed by experiments conducted by the present inventors.

Therefore, according to the present embodiment, it is possible to increase the wind speed at the face position of the occupant 5 as compared with the first embodiment. In the experiment conducted by the present inventor, it has been confirmed that the wind speed at the point P1 that is 1 m away from the center of the outlet 11 increases by 0.5 m / s.

(Third embodiment)
The air blowing device 10 of the present embodiment is different from the air blowing device 10 of the first embodiment in the shape of the protrusions, and the other configurations are the same as the air blowing device 10 of the first embodiment. is there.

As shown in FIG. 17, also in the air blowing device 10 of the present embodiment, the protruding portion 16 is provided on the second wall 122 of the duct 12. This protrusion 16 corresponds to the protrusion 15 of the first embodiment.

The protrusion 16 has a curved surface 16a that curves in a convex shape toward the front side upstream of the tip of the protrusion 16 on the upstream side of the air flow. The curved surface 16 a extends from the position on the upstream side of the air flow of the protrusion 16 in the second wall 122 to the position of the tip of the protrusion 16.

Here, as in the first embodiment, when the protruding portion 15 is plate-shaped and extends in a direction orthogonal to the surface of the second wall 122, the air flow upstream of the protruding portion 15 is in the face mode. Itching occurs on the side.

On the other hand, according to the present embodiment, in the face mode, a low-speed air flow F2 can flow along the curved surface 16a, and stagnation occurs on the upstream side of the air flow of the protrusion 16 inside the duct 12. Can be avoided.

(Other embodiments)
The present disclosure is not limited to the above-described embodiment, and can be appropriately changed within the scope described in the claims as follows. The present disclosure also allows the following modifications and equivalent ranges of the above-described embodiments.

(1) In each of the above embodiments, the

protrusions

15 and 16 are located on the most downstream portion of the second wall 122 in the air flow, but may be located on the upstream side of the air flow from this position. The

protrusions

15 and 16 only need to be located in a portion of the second wall 122 on the downstream side of the air flow with respect to the airflow deflection door 13.

(2) The shapes of the

protrusions

15 and 16 are not limited to the shapes described in the above embodiments. The projecting

portions

15 and 16 project from the second wall 122 toward the first wall 121, and the low-speed airflow F 2 flowing along the second wall 122 travels from the second wall 122 to the first wall 121. Any shape that can be directed in the direction is acceptable.

(3) In 2nd Embodiment, protrusion amount L1a, L1b of

protrusion part

15a, 15b in the both ends of the left-right direction of the 2nd wall 122 becomes large gradually as it goes to the end from the center side of the left-right direction. However, it is not limited to this. The protruding amounts L1a and L1b of the protruding

portions

15a and 15b may be constant at both the left and right ends of the second wall 122. The protruding amounts L1a and L1b of the protruding

portions

15a and 15b at both the left and right end portions of the second wall 122 are larger than the protruding amount L1c of the protruding portion 15c at a portion inside the both end portions of the second wall 122 in the left and right direction. If it is larger, the effect (1) described in the second embodiment can be obtained.

Moreover, not only both protrusion amount L1a and L1b of

protrusion part

15a, 15b but one of these is more than protrusion amount L1c of protrusion part 15c in the site | part inside the both ends of the left-right direction of the 2nd wall 122. It only needs to be large. Thereby, the effect (1) described in the second embodiment can be obtained.

Further, in the second embodiment, the protruding portion 15 is formed in the entire area in the left-right direction of the outlet 11 in the second wall 122, but is not limited thereto. Within the range of the center side rather than the both ends of the 2nd wall 122 in the left-right direction of the blower outlet 11, there may exist the part in which the protrusion part 15c is formed, and the part in which the protrusion part 15c is not formed. . Only one of the

protrusions

15a and 15b at both ends of the second wall 122 in the left-right direction of the air outlet 11 may be formed. That is, the projecting portion 15 is at least on the center side of the end portion in the left-right direction of the air outlet 11 of the second wall 122 and the end portion of the second wall 122 in the left-right direction of the air outlet 11. What is necessary is just to be formed in the part. At this time, similarly to the second embodiment, the protruding amount of the protruding portion 15 at the end portion is made larger than the protruding amount of the protruding portion 15 at the central portion. Thereby, the effect (1) described in the second embodiment can be obtained. Further, similarly to the second embodiment, the protruding amount of the protruding portion 15 at the end portion is gradually increased from the center side in the left-right direction of the air outlet 11 toward the end side. Thereby, the effect (2) described in the second embodiment can be obtained.

(4) In the second embodiment, the sides 11b1 and 11b2 formed by the ends of the

protrusions

15a and 15b are linear, and the perpendicular direction of the sides 11b1 and 11b2 is the face of the occupant 5 that is the target point P1. It was suitable. However, the shape of the sides 11b1 and 11b2 formed by the tips of the

protrusions

15a and 15b is not limited to a straight line, and may be a curve. For example, an arc shape that is convex in the direction from the first wall 121 toward the second wall 122 may be used. In this case, the perpendicular direction of the tangent line of the sides 11b1 and 11b2 is set to face the target point P1. Thereby, the effect (2) described in the second embodiment can be obtained.

(5) In each of the above embodiments, the planar shape of the air outlet 11 is a curved shape, but it may be a shape extending linearly. That is, the long side 11a of the air outlet 11 constituted by the tip of the guide wall 14 may be a straight line instead of a curve.

(6) In each of the above embodiments, the air outlet 11 has a flat shape extending in one direction, but may not have a flat shape. That is, the pair of

sides

11a and 11b and the pair of

sides

11c and 11d at the opening edge of the outlet 11 may have the same length.

(7) In each of the above embodiments, the butterfly door is employed as the airflow deflecting door 13, but other doors such as a sliding door may be employed. When the sliding door is employed, the position of the air flow deflecting door 13 is set to a position where the cross-sectional area of the first flow path 12a is smaller than the cross-sectional area of the second flow path 12b. As a result, a high-speed air flow is generated in the first flow path 12a and a low-speed air flow is generated in the second flow path 12b.

(8) In each of the embodiments described above, the air blowing device of the present disclosure is applied to the air outlet 11 of the upper surface portion 1a of the instrument panel 1. However, the air blowing device of the present disclosure is applied to the air outlet of the lower surface of the instrument panel 1 ( That is, you may apply to a foot blower outlet. In this case, the blowing angle of the air blown from the foot outlet can be arbitrarily changed. Moreover, in each said embodiment, although the air blowing apparatus of this indication was applied to the vehicle air conditioner, you may apply the air blowing apparatus of this indication to air conditioners other than a vehicle.

(9) The above embodiments are not irrelevant to each other, and can be appropriately combined unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes.

Claims

An air blowing device for blowing out air;
An air outlet (11) for blowing air into the target space;
A flow path forming section (1) having a first wall (121) and a second wall (122) facing the first wall, and forming therein an air flow path connected to the upstream side of the air flow of the outlet. 12)
An air flow deflecting member (13) provided in the air flow path and generating two air flows having different flow velocities in the air flow path;
In the air flow path, a first flow path (12a) is defined between the air flow deflecting member and the first wall, and a second flow path (12b) is defined between the air flow deflecting member and the second wall. When
The air flow deflecting member is relatively configured to generate a high speed air flow (F1) in the first flow path and to generate a low speed air flow (F2) in the second flow path,
A part of the first wall on the outlet side bends a high-speed air flow from the first flow path generated by the air-flow deflecting member along the wall surface so as to change the direction of the high-speed air flow. Configuring a guide wall (14) for guiding the high-speed air flow so as to be directed from the second wall toward the first wall;
The flow path forming portion protrudes from the second wall toward the first wall at a portion of the second wall on the downstream side of the air flow deflecting member with respect to the airflow deflecting member, and is formed on the second wall. An air blowing device having protrusions (15, 16) for directing a low-speed airflow flowing along the second wall in a direction from the second wall toward the first wall.
An air blowing device for blowing out air;
An air outlet (11) for blowing air into the target space;
A flow path forming section (1) having a first wall (121) and a second wall (122) facing the first wall, and forming therein an air flow path connected to the upstream side of the air flow of the outlet. 12)
An air flow deflecting member (13) provided in the air flow path and generating two air flows having different flow velocities in the air flow path;
In the air flow path, a first flow path (12a) is defined between the air flow deflecting member and the first wall, and a second flow path (12b) is defined between the air flow deflecting member and the second wall. When
In the airflow deflecting member, since the cross-sectional area of the first flow path is smaller than the cross-sectional area of the second flow path, the airflow (F1) faster than the airflow in the second flow path is generated in the first flow. An air flow (F2) that is generated in the road and slower than the air flow in the first flow path is generated in the second flow path,
A part of the first wall on the outlet side bends a high-speed air flow from the first flow path generated by the air-flow deflecting member along the wall surface so as to change the direction of the high-speed air flow. Configuring a guide wall (14) for guiding the high-speed air flow so as to be directed from the second wall toward the first wall;
The flow path forming portion protrudes from the second wall toward the first wall at a portion of the second wall on the downstream side of the air flow deflecting member with respect to the airflow deflecting member, and is formed on the second wall. An air blowing device having protrusions (15, 16) for directing a low-speed airflow flowing along the second wall in a direction from the second wall toward the first wall.
The blower outlet has a direction in which the first wall and the second wall are opposed to each other as a vertical direction, and a direction intersecting the direction in which the first wall and the second wall are opposed to each other is horizontal. Direction,
The protrusion is formed in the entire area of the second wall in the lateral direction of the air outlet,
The amount of protrusion of the projecting portion at at least one of both end portions of the second wall in the lateral direction of the air outlet is at a portion inside the both end portions of the second wall in the lateral direction of the air outlet. The air blowing device according to claim 1, wherein the air blowing device is larger than a protruding amount of the protruding portion.
The at least one of the both ends of the said 2nd wall in the horizontal direction of the said blower outlet WHEREIN: The said protrusion amount is gradually large as it goes to the end side from the center side in the horizontal direction of the said blower outlet. The air blowing device described.
The blower outlet has a direction in which the first wall and the second wall are opposed to each other as a vertical direction, and a direction intersecting the direction in which the first wall and the second wall are opposed to each other is horizontal. Direction,
The projecting portion is formed at least on an end portion in the lateral direction of the second wall and on a portion of the second wall on the center side of the end portion in the lateral direction. ,
The air blowing device according to claim 1, wherein a protruding amount of the protruding portion at the end portion is larger than a protruding amount of the protruding portion at the central portion.
6. The air blowing device according to claim 5, wherein the protruding portion at the end portion gradually increases as the protruding amount moves from the center side to the end side in the lateral direction.
When the protrusion amount of the protrusion is L1, and the distance between the tip of the protrusion and the airflow deflecting member in the direction in which the first wall and the second wall face each other is L2, the following formula ( 1)
1.5 ≦ L1 / L2 ≦ 1.7 (1)
The air blowing device as described in any one of Claim 1 thru | or 6 satisfy | filling these.
The air outlet is provided on the upper surface of the instrument panel of the vehicle,
8. The projection according to claim 1, wherein the projecting portion is located at a most downstream portion of the second wall in the air flow, and the upper surface of the projecting portion and the surface of the upper surface portion are flush with each other. The air blowing device described in 1.