JP2008265447A - Vehicular air-conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure for adjusting a ratio of ventilating amount from a side face blowoff port to the total ventilating amount so that the ratio becomes a required ratio for each of a plurality of blowoff modes. <P>SOLUTION: In the vehicular air-conditioner switching all blowoff modes only by two mode doors, a face defroster passage is divided into three passages 23 to 25 from a food door 40 position, and a plate door portion on a face passage side of the foot door 40 is constituted by three plate door portions. Only the plate door portion 42a disposed in the center face passage 23 is made in the size which can shelter the passage 23. The plate door portion 42b, 42c disposed on the first and second side face passages 24, 25 are made smaller than the passages 24, 25 and made in a shape leaking wind. A face defroster door is also constituted by three plate door portions like the hood door 40. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner.

  Conventionally, as described in Patent Document 1, a face defroster door that opens and closes a face air passage and a defroster air passage, and a foot door that opens and closes a main air passage and a foot air passage upstream of the face defroster door. In the vehicle air conditioner capable of switching the full blow mode only with two mode doors, as described in Patent Document 1, the face air passage is divided into a center face blowout passage, a side face blowout passage, There is a configuration in which the side face air outlet passage is maintained in an open state in all the air outlet modes.

  Specifically, by making the width of the face / defroster door smaller than the width of the face air passage, even when the center face outlet is fully closed, the side face outlet can be connected to the face / defroster door. Similarly, by forming a passage and making the foot door width smaller than the width of the main air passage, the foot door is in a position where the foot air passage is fully opened (position where the main air passage is fully closed). The passage that leads to the side face outlet is formed in the measurement of the foot door.

Further, as described in Patent Document 2, a vehicle air conditioner that performs switching operation of all blowing modes using three mode doors, and in the same manner as Patent Document 1, in all blowing modes, There exists a structure which maintains the opening part which leads to a face blower outlet in an open state.
JP-A-9-263120 Japanese Patent Laid-Open No. 2003-335120

  According to the vehicle air conditioner described in Patent Literature 1 described above, by changing the width of the face / defroster door and the foot door and the passage width on the case side, the amount of air blown from the side face air outlet to the total amount of air blown However, when the adjustment is performed for each of the plurality of blowing modes, there is a problem that the degree of freedom of the adjustment is low.

  For example, in the foot defroster mode, when the door width and the case side passage width are determined in order to obtain the desired ratio of the air flow rate from the side face outlet to the total air flow rate, The ratio of the air flow rate from the side face outlet to the total air flow rate in the air blowing mode is determined according to the width of the door and the passage width on the case side, and it is difficult to adjust to the desired rate It is.

  In addition, the vehicle air conditioner described in Patent Document 2 described above is intended to adjust the ratio of the air flow rate from the side face air outlet to the total air flow rate to a desired rate regardless of the air blowing mode. However, since this is based on the premise that all the blowing modes are switched using three mode doors, this technology is used to switch all blowing modes using only two mode doors. It cannot be applied to air conditioners for industrial use.

  In view of the above points, the present invention provides a vehicle air conditioner capable of switching between all blowing modes with only two mode doors, and the ratio of the amount of air blown from the side face outlet to the total amount of blowing for each of a plurality of blowing modes. An object of the present invention is to provide a vehicle air conditioner having a structure capable of adjusting the ratio to a desired ratio.

To achieve the above object, according to the present invention, the face defroster passage (20) includes a center face defroster air passage (23) between the foot door (40) and the face defroster door (50). The center face / defroster air passage (23) is divided from the position of the face / defroster door (50) into the center face passage (23a) and the defroster passage. Branched to (23b),
Further, of the three plate door portions (42a, 42b, 42c) of the foot door, the plate door portion (42a) disposed in the center face / defroster air passage (23) has the center face / defroster air passage (23). The plate door portions (42b, 42c), which are of a size that can be shielded and are arranged in the first and second side face passages (24, 25), are in relation to the first and second side face air passages (24, 25). It is small and has a shape to leak wind, and among the three plate door portions (51a, 51b, 51c) of the face / defroster door (50), the center face air passage (23a) and the defroster passage (23b) are switched open and closed. The plate door portion (51a) disposed at the position is large enough to shield the center face air passage (23a) and the defroster passage (23b). Therefore, the plate door portions (51b, 51c) disposed in the first and second side face passages (24, 25) are smaller than the first and second side face air passages (24, 25), and the wind It is a shape to leak.

  For example, the first and second side face air passages (24, 25) are arranged at both ends of the center face / defroster air passage (23) in the vehicle left-right direction.

  According to the present invention, the ratio of the air flow rate from the side face air outlet to the total air flow rate in each air blowing mode is determined by the opening of the first and second side face passages by the two mode doors of the foot door and the face defroster door. And the amount of wind leakage leaked from the gap between the first and second side face passages formed by the mode doors, the first and second side face passages formed by the mode doors. By adjusting the gap, the ratio of the air flow rate from the side face air outlet to the total air flow rate can be set to a desired size for each of the plurality of air blowing modes.

  Here, in the vehicle air conditioner described in Patent Document 1 described above, the face / defroster passage (20) is not partitioned as described above between the foot door (40) and the face / defroster door (50). . The face passage on the downstream side of the air flow from the face / defroster door (50) is partitioned as described above.

  For this reason, for example, in the foot mode, a part of the wind leaking from the gap of the passage formed by the foot door flows into the defroster passage, so the ratio of the air flow rate from the side face outlet to the total air flow rate is It has been difficult to adjust the amount of wind leakage from the gap of the passage formed by the foot door and the face defroster door so that the desired ratio is obtained.

  On the other hand, in the present invention, the face defroster passage (20) is connected to the center face defroster air passage (23) between the foot door (40) and the face defroster door (50). Since it is divided into side face air passages (24, 25), for example, in the foot mode, all the air leaking from the gaps of the first and second side face passages formed by the foot doors is caused by the face defroster doors. It will pass through the gap between the first and second side face passages formed.

  Therefore, according to the present invention, the amount of wind leakage from the gap between the first and second side face passages formed by both the foot door and the face / defroster door is changed. Compared with the air conditioner, the ratio of the air flow rate from the side face outlet to the total air flow rate in each mode can be easily adjusted.

  In addition, the code | symbol in the bracket | parenthesis of each means described in the claim and this column is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

(First embodiment)
FIG. 1 shows a schematic configuration of an indoor unit of the vehicle air conditioner according to the first embodiment of the present invention. FIG. 2 shows a schematic configuration of the blowing mode switching mechanism of the indoor unit in FIG.

  Although not shown, the indoor unit 1 is disposed at a substantially central portion in the vehicle width (left and right) direction inside the instrument panel at the front of the vehicle interior. At that time, the indoor unit 1 is mounted as shown by arrows in FIG. Therefore, the vehicle width (left-right) direction is the direction perpendicular to the paper surface of FIG.

  As shown in FIG. 1, the indoor unit 1 includes a case 2, an evaporator 3, a heater core 4, and an air mix door 5.

  The case 2 has an air flow path formed therein, and houses devices such as the evaporator 3, the heater core 4, and the air mix door 5. The case 2 is molded from a resin such as polypropylene, and is divided into a plurality of divided case bodies as is well known, and after housing equipment such as the evaporator 3, the heater core 4, and the air mix door 5. In addition, a plurality of divided case bodies are integrally coupled by an appropriate coupling means such as a metal clip or a screw.

  The case 2 is provided with an air opening 2a on the upstream side of the evaporator 3, and blown air from a blower (not shown) flows from the air opening 2a.

  The evaporator 3 constitutes a well-known refrigeration cycle together with a compressor, a radiator, and a decompressor (not shown), and acts as a cooling heat exchanger that dehumidifies and cools the air blown into the case 2. .

  The heater core 4 is a heating heat exchanger that heats air using the cooling water of the automobile engine as a heat source, and is disposed on the downstream side of the air in the evaporator 3 in the case 2. Is reheated. In the case 2, a cool air passage 6 through which the cool air cooled by the evaporator 3 bypasses the heater core 4 flows is formed on the downstream side of the evaporator 3 on the upper side.

  On the other hand, in the case 2, a warm air passage 7 through which the warm air heated by the heater core 4 flows is formed at the downstream side of the heater core 4. The warm air passage 7 is formed in the heater core 4 as shown in the figure. It extends upward from the downstream side of the air, further passes through the passage 7 a in the upper part of the heater core 4, makes a U-turn toward the front side of the vehicle, and merges downstream of the cool air passage 6. A cold / hot air mixing passage 9 is formed on the downstream side of the air flow from the junction 8.

  The air mix door 5 has a shaft 5a and a plate door portion 5b arranged at the upper end of the heater core 4, and is held by the case 2 so as to be rotatable about the shaft 5a. The air volume ratio between the cold air passage 6 and the hot air passage 7 is adjusted according to the opening degree of the air to adjust the temperature of the air blown into the passenger compartment.

  And the blowing mode switching mechanism part 10 of the structure shown in FIG. 2 is arrange | positioned above the junction part 8 of case 2. As shown in FIG. As shown in FIG. 2, in the blowing mode switching mechanism 10, a face / defroster passage 20 branched from the cold / hot air mixing passage 9 and a foot passage 30 are formed in the case 2.

  The face / defroster passage 20 is an air passage from the cold / hot air mixing passage 9 toward the face opening 21 and the defroster opening 22 provided in the upper part of the case 2. A face duct (not shown) is connected to the face opening 21 so that air is blown out from the face outlet at the tip of the face opening 21 toward the face of the occupant. A defroster duct (not shown) is connected to the defroster opening 22 so that air is blown out from the defroster outlet at the tip of the defroster duct toward the inner surface of the vehicle front window glass.

  The foot passage 30 is an air passage from the junction 8 and the cold / hot air mixing passage 9 toward the foot opening 31 provided in the case 2. A foot duct (not shown) that hangs downward is connected to the foot opening 31, and air is blown from the foot outlet at the lower end of the foot duct to the feet of the occupant.

  The face / defroster passage 20 and the foot passage 30 are switched and opened and closed by a foot door 40. The foot door 40 is constituted by a butterfly door having a first plate door portion 42 and a second plate door portion 43 that are integrally coupled to both sides in the radial direction of the rotating shaft 41. The foot door 40 of the present embodiment has a shape in which a first plate door portion 42 located on the face / defroster passage side and a second plate door portion 43 located on the foot passage side are refracted in a dogleg shape. Both end portions of the rotating shaft 41 are rotatably held by bearing holes in a side wall portion (not shown) of the case 2.

  The face / defroster passage 20 is branched into a face passage and a defroster passage on the upper side (downstream of the air flow) of the case 2, and the face passage and the defroster passage are switched by a face / defroster door 50. It has come to be. The face / defroster door 50 has a plate door portion 51 and a rotating shaft 52 coupled to one side thereof, and both ends of the rotating shaft 52 can be rotated by bearing holes in a side wall portion (not shown) of the case 2. Is held on.

  3 and 4 are respectively a cross-sectional view taken along line AA and a cross-sectional view taken along line BB in FIG. The left-right direction in FIGS. 3 and 4 is the left-right direction of the vehicle, as indicated by the arrows in the figure, and corresponds to the direction perpendicular to the plane of FIG. In FIG. 4, in order to compare the sizes of the first and second plate door portions and each passage, for convenience, the first plate door portion 42 is located at a position p1 indicated by a solid line, and is indicated by a two-dot chain line. The case where the 2nd board door part 43 is located in the position p3 to be shown is shown.

  As shown in FIGS. 3 and 4, in this embodiment, the face / defroster passage 20 is divided into three parts from the position of the foot door 40. That is, the face / defroster passage 20 includes a center face / defroster passage 23 located at the center of the case 2 in the vehicle left-right direction between the foot door 40 and the face / defroster door 50, and first and second ends located at both ends thereof. It is divided into three air passages with side face passages 24 and 25. The center face / defroster passage 23 branches into a center face passage 23a and a defroster passage 23b (see FIG. 2) in the vicinity of the face / defroster door 50.

  Here, the center face passage 23 a communicates with the center face outlet through a center face opening provided in the case 2. The center face outlet is disposed above the center of the instrument panel at the front of the vehicle interior, and air is blown out from here toward the upper body of the passenger near the center of the vehicle interior.

  The first and second side face passages 24 and 25 communicate with the first and second side face outlets via first and second side face openings provided in the case. The first and second side face outlets are arranged on the upper sides of the left and right sides of the instrument panel, from which the air is blown out toward the upper occupants of the left and right sides of the passenger compartment, and the side windows of the vehicle It selects and uses the blowing state which blows off air toward.

  As shown in FIG. 3, the face / defroster door 50 includes three plate door portions 51a, 51b, and 51c arranged in the left-right direction of the vehicle. The three plate door portions are composed of a center face door portion 51a located at the center and first and second side face passage door portions 51b and 51c located at both ends thereof. Arranged in the passages 23a, 24, 25. Of these three door plate plates, only the center face passage door portion 51a is larger than the passage 23a so that the passage 23a can be closed without any gaps (that is, a size capable of shielding the passage 23a). The first and second side face passage door portions 51b and 51c have a gap between the door portions 51b and 51c and the passages 24 and 25 even when the passages 24 and 25 are closed. The passages 24 and 25 are smaller than the opening shape (that is, the gaps are formed between the door portions 51b and 51c and the passages 24 and 25) so that the wind leaks from the gaps. It has become.

Further, as shown in FIG. 4, the first plate door portion 42 of the foot door 40 is constituted by three plate door portions 42 a, 42 b, 42 c arranged in the left-right direction of the vehicle, like the face / defroster door 50. . The three door plate portions are constituted by a center face / defroster passage door portion 42a located at the center and first and second side face passage door portions 42b, 42c located at both ends thereof, A corresponding passage 23, 24, 25 is arranged.
Of the three door plate portions, only the center face / defroster passage door portion 42a has a size capable of shielding the passage 23, and the first and second side face passage door portions 42b, 42c Even when the door is closed, the gap is formed between the door portions 42b and 42c and the passages 24 and 25, and the wind is leaked from the gap. In the present embodiment, the gaps between the first and second side face passage door portions 42 b and 42 c of the foot door 40 and the passages 24 and 25 are the first and second side face passages of the face / defroster door 50. It is larger than the gap between the door portions 51b, 51c and the passages 24, 25.

  Here, FIG. 5 shows a cross-sectional view taken along the line CC in FIG. As shown in FIG. 5, for example, two wall portions 61 and 61 that divide the inside of the case 2 into three spaces in the left-right direction of the vehicle are arranged inside the case 2, thereby the center face passage 23 a First and second side face passages 24 and 25 located on both sides are formed. Note that the center face passage 23a in FIG. 3 corresponds to the space between the protruding portions 61a and 62a provided in the two wall portions 61 and 62 in FIG.

  The face / defroster door 50 and the foot door 40 constitute a blow mode switching door, and the rotary shafts 52 and 41 of both the doors 50 and 40 are connected to the blow mode operation mechanism via a link mechanism (not shown). Thus, both the doors 50 and 40 are interlocked and rotated to a predetermined position by this blowing mode operation mechanism. This blowing mode operation mechanism may be configured by either an automatic operation mechanism using a servo motor or a manual operation mechanism using a manual operation force of an occupant.

  Next, an outline of the operation of the entire air conditioner having the above-described configuration will be described. When a blower (not shown) is operated, the inside air or the outside air sucked from the blower is blown from the air opening 2a of the case 2 to the evaporator 3, where it is cooled to become cold air. Next, the cold air branches and flows into the cool air passage 6 and the warm air passage 7 on the heater core 4 side according to the opening position of the air mix door 5, and the cold air flowing into the heater core 4 is reheated by the heater core 4. It becomes warm air and flows through the warm air passage 7. The hot air from the hot air passage 7 and the cold air from the cold air passage 6 are mixed in the mixing unit 8 and the cold / hot air mixing passage 9 to be conditioned air at a desired temperature. After that, by the blowing mode operation mechanism, The face / defroster door 50 and the foot door 40 are operated and blown out from a predetermined outlet through one or more of the selected air passages 23a, 23b, 24, 25, 30 into the vehicle interior.

  Next, the blowing mode switching operation by the face defroster door 50 and the foot door 40 will be described.

  First, in the “face mode”, the face defroster door 50 is operated to the broken line position P2 in FIG. 2 to fully close the defroster passage 23b, and the center face passage 23a and the first and second side face passages 24, 25. Fully open. Further, the foot door 40 is operated at the two-dot chain line position p3 in FIG. 2 to fully close the foot passage 30. As a result, all the conditioned air from the cool / warm air mixing passage 9 flows into the face passages 23a, 24, 25, and blows out upward from the center face air outlet and the first and second side face air outlets.

  Next, in the “bi-level mode”, the face / defroster door 50 is operated to the broken line position P2 in FIG. 2 to fully open the center face passage 23a and the first and second side face passages 24, 25. Further, the foot door 40 is operated to a broken line position (intermediate opening position) p2 in FIG. 2 to open the center face / defroster passage 23, the first and second side face passages 24 and 25, and the foot passage 30. As a result, part of the conditioned air from the cool / warm air mixing passage 9 flows into the foot passage 30 and blows out from the foot outlet to the occupant's feet, and simultaneously flows into the face passages 23a, 24, 25. Then, the air is blown out from the center face air outlet and the first and second side face air outlets to the upper side of the vehicle interior.

  At this time, the ratio of the blast volume from the first and second side face outlets to the total blast volume is determined by the door opening degree of the foot door 40 and the first and second side face passage door portions 42b and 42c of the foot door 40. It is determined by the amount of gap between the first and second side face passages 24 and 25 (see FIG. 4).

  Next, in the “foot mode”, the face / defroster door 50 is operated to the solid line position P1 in FIG. 2 to fully open the defroster passage 23b and fully close the center face passage 23a. Further, the foot door 40 is operated to the solid line position p1 in FIG. 2 to fully close the center face / defroster passage 23 and fully open the foot passage 30. As a result, most of the conditioned air from the cool / warm air mixing passage 9 flows into the foot passage 30 and blows out from the foot outlet to the occupant's feet. The first and second side face passages of the face / defroster door 50 pass through the first and second side face passages 24 and 25 from the gaps between the second side face passage door portions 42b and 42c and the passages 24 and 25. Through the gaps between the door portions 51b and 51c and the passages 24 and 25, the first and second side face outlets blow out from the left and right ends of the instrument panel to the upper side in the passenger compartment.

  At this time, the ratio of the blast volume from the first and second side face outlets to the total blast volume is the clearance between the first and second side face passage door portions 42b and 42c of the foot door 40 and the passages 24 and 25. The first and second side face passage door portions 51b and 51c of the face / defroster door 50 and the gaps between the passages 24 and 25 are determined (see FIGS. 3 and 4).

  Next, in the “foot defroster mode”, the face defroster door 50 is operated to the solid line position P1 in FIG. 2 to fully open the defroster passage 23b and fully close the center face passage 23a. Further, the foot door 40 is operated to a broken line position (intermediate opening position) p2 in FIG. 2 to open the center face / defroster passage 23, the first and second side face passages 24 and 25, and the foot passage 30. Thereby, a part of the conditioned air from the cool / warm air mixing passage 9 flows into the foot passage 30 and blows out from the foot outlet to the passenger's feet. At the same time, the remainder of the conditioned air is blown out from the side face outlet and the defroster outlet.

At this time, the ratio of the blast volume from the first and second side face outlets to the total blast volume is
The door opening degree of the foot door 40, the amount of clearance between the first and second side face passage door portions 42b and 42c of the foot door 40 and the passages 24 and 25, and the first and second side face passages of the face defroster door 50 It is determined by the door portions 51b and 51c and the gaps between the passages 24 and 25 (see FIGS. 3 and 4).

  Next, in the “defroster mode”, the face / defroster door 50 is operated to the solid line position P1 in FIG. 2 to fully open the defroster passage 23b and fully close the center face passage 23a. Further, the foot door 40 is operated at the two-dot chain line position p3 in FIG. 2 to fully close the foot passage 30. As a result, most of the conditioned air from the cool / warm air mixing passage 9 passes through the defroster passage 23b and blows out from the defroster outlet toward the vehicle front window glass. At the same time, the remaining part of the conditioned air blows out from the side face outlet.

  At this time, the ratio of the blast volume from the first and second side face outlets to the total blast volume is that of the first and second side face passage door portions 51b and 51c of the face defroster door 50 and the passages 24 and 25. It is determined by the gap amount (see FIG. 3).

  As described above, in the present embodiment, the ratio of the air flow rate from the first and second side face air outlets to the total air flow rate in each air blowing mode is determined by the opening degree of the foot door 40 and the first and second of the foot door 40. The amount of clearance between the two side face passage door portions 42b and 42c and the passages 24 and 25, and the amount of clearance between the first and second side face passage door portions 51b and 51c of the face defroster door 50 and the passages 24 and 25, Therefore, the ratio of the amount of air blown from the side face air outlet to the total amount of air blown is set for each of a plurality of air blowing modes by considering these combinations. It becomes possible to adjust to the ratio.

  Here, FIG. 6 shows a schematic configuration of the blowing mode switching mechanism of the indoor unit as a comparative example of the present embodiment. FIGS. 7 and 8 are cross-sectional views taken along the line DD in FIG. -E line sectional drawing is shown. 6-8, the same code | symbol is attached | subjected to the part similar to the structure part in FIGS.

  In the blowout mode switching mechanism of the indoor unit shown in FIG. 6, the face / defroster passage 20 starts from the vicinity of the foot door 40 from the vicinity of the foot door 40 as shown in FIG. Up to the vicinity of 50, the air passage is composed of one air passage. As shown in FIG. 7, the face passage downstream of the face defroster 50 is a center face passage 71 and first and second side face passages 72. , 73.

  As shown in FIG. 7, the shape of the face / defroster door 50 is the same as that of the first and second side face passages 72 and 73 and the plate door portion of the face / defroster door even when the center face passage 71 is fully closed. 51 is formed into a shape in which a gap is formed. Further, as shown in FIG. 8, the shape of the foot door 40 is the plate door portion of the face / defroster passage 20 and the foot door 40 even when the foot door 40 is in a position where the foot passage 30 is fully opened and the face / defroster passage 20 is closed. 42, a gap is formed between them.

  Also in the blowing mode switching mechanism having such a configuration, for example, in the foot mode, wind leaking from the gaps on both ends of the foot door 40 flows through the first and second side face passages 72 and 73, and the first and second sides. Blow out from the 2 side face outlet.

  However, since the face defroster passage 20 is composed of a single air passage (see FIG. 8), the wind leaking from the gaps at both ends of the foot door 40 joins the face defroster passage 20 and then the face defroster door. In the vicinity of 50, a part thereof flows into the defroster passage 23b and blows out also from the defroster outlet, and the amount of air blown from the first and second side face outlets decreases. As described above, in the blow mode switching mechanism of the indoor unit shown in FIG. 6, the amount of gap between the foot door 40 and the face / defroster passage 20 must be adjusted in consideration of the amount of air blown from the defroster outlet. It is difficult to adjust the ratio of the air flow rate from the side face outlet to the desired air flow rate.

  On the other hand, in the present embodiment, the face / defroster passage 20 is divided into three parts from the position of the foot door 40, so that the air leaking from the gaps at both ends of the foot door 40 in the foot mode as in the above comparative example. However, it does not blow out from the defroster outlet. Therefore, according to this embodiment, as above-mentioned, it becomes easy to adjust the ratio of the ventilation volume from the side face blower outlet with respect to the total ventilation volume to a desired ratio.

(Other embodiments)
(1) In the first embodiment, the foot door 40 is constituted by a butterfly door. However, as in the first embodiment, the center face / defroster passage door portion 42a and the first and second doors located at both ends thereof are provided. As long as it has a structure having the two side face passage door portions 42b and 42c, the door may have another structure, for example, a cantilever plate door.

  (2) In the first embodiment, the face / defroster passage 20 is divided into three parts in the left-right direction of the vehicle, the center face / defroster passage 23 is arranged in the center, and the first and second side face passages 24 are arranged at both ends thereof. 25 is arranged, but the arrangement order may be changed.

  (3) In the first embodiment, each opening provided in the case 2 is connected to each duct, which is a separate part from the case 2 and whose tip is a blowout port. 2 may be used. That is, it is good also as a structure which uses each opening provided in case 2 as each blower outlet.

  (4) The configuration of the indoor unit is not limited to the configuration of the above-described embodiment, and may be arbitrarily changed as long as it is a configuration in which the entire blowing mode is switched using only two mode doors.

It is a figure which shows schematic structure of the indoor unit of the vehicle air conditioner in 1st Embodiment of this invention. It is a figure which shows schematic structure of the blowing mode switching mechanism part of the indoor unit in FIG. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is CC sectional view taken on the line in FIG. It is a figure which shows schematic structure of the blowing mode switching mechanism part of the indoor unit as a comparative example of 1st Embodiment. It is the DD sectional view taken on the line in FIG. It is the EE sectional view taken on the line in FIG.

Explanation of symbols

2 ... Case, 23 ... Center face defroster passage,
23a ... Center face passage, 23b ... Defroster passage,
24 ... 1st side face passage, 25 ... 2nd side face passage,
40 ... Foot door, 50 ... Face defroster door.

Claims (2)

A case (2) forming an air passage;
A heat exchanger (3, 4) provided in the case (2) for exchanging heat with the blown air;
A cold / hot air mixed air passage (9) through which air adjusted to a predetermined temperature through heat exchange with the heat exchangers (3, 5) flows;
A face / defroster air passage (20) branched from the cold / hot air mixed air passage (9) and communicating with the face outlet and the defroster outlet;
A foot air passage (30) branched from the cold / hot air mixed air passage (9) and communicating with the foot outlet;
A foot door (40) for switching and opening and closing the face defroster air passage (20) and the foot air passage (30);
A face defroster door (50) for opening and closing the face defroster air passage (20),
In the vehicle air conditioner for switching the blowing mode by the foot door (40) and the face defroster door (50),
The face / defroster passageway (20) includes a center face outlet and a defroster that blows air from the center of the vehicle instrument panel upward to the vehicle interior between the foot door (40) and the face / defroster door (50). A center face / defroster air passage (23) communicating with the air outlet, and first and second side face air passages (23) communicating with the side face air outlet that blows air upward from the left and right sides of the vehicle instrument panel. 24, 25),
The center face / defroster air passage (23) includes, from the position of the face / defroster door (50), a center face passage (23a) communicating with the center face outlet and a defroster passage (communication with the defroster outlet) 23b),
The foot door (40) has three plate door portions (42a, 42b, 42a, 42b) arranged corresponding to the center face / defroster air passage (23) and the first and second side face air passages (24, 25). 42c)
Of the three plate door portions (42a, 42b, 42c) of the foot door, the plate door portion (42a) disposed in the center face / defroster air passage (23) is connected to the center face / defroster air passage (23 ) And the plate door portions (42b, 42c) disposed in the first and second side face passages (24, 25) are arranged in the first and second side face air passages (24). , 25) and is a shape that leaks wind,
The face / defroster door (50) has three plate door portions (51a, 51b) arranged corresponding to the center face air passage (23a) and the first and second side face air passages (24, 25). 51c)
Of the three plate door portions (51a, 51b, 51c) of the face / defroster door (50), the plate is arranged at a position for switching the center face air passage (23a) and the defroster passage (23b). The door portion (51a) is sized to shield the center face air passage (23a) and the defroster passage (23b), and the plate disposed in the first and second side face passages (24, 25). The vehicle air conditioner characterized in that the door portions (51b, 51c) are smaller than the first and second side face air passages (24, 25) and have a shape for leaking wind. 2. The vehicle according to claim 1, wherein the first and second side face air passages (24, 25) are arranged at both ends of the center face / defroster air passage (23) in the left-right direction of the vehicle. Air conditioner.

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