JP5545267B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to an air mix type vehicle air conditioner that mixes cold air and warm air.

  Patent Document 1 discloses a technique for improving the mixing of cold air and hot air in a conventional vehicle air conditioner. In the technique described in Patent Document 1, a warm air passage extending from the heater core to the air mix chamber, and an outlet that bypasses the air mix chamber at one end from the heater core and is located on the opposite side of the outlet from the warm air passage. A warm air bypass passage having The hot air flowing through the hot air bypass passage is U-turned to blow the hot air into the cold air passage, thereby sandwiching the cold air passage between the hot air passage and the hot air bypass passage.

  Patent Document 2 discloses a technique for improving the mixing of cold air and hot air at a differential outlet of a conventional vehicle air conditioner. In the technique described in Patent Document 2, a guide member that disperses warm air in the width direction is provided at the differential outlet.

JP 2010-155497 A US Pat. No. 5,091,755

  The technique described in Patent Document 1 has a problem that the passage resistance increases because the warm air is U-turned by the warm air bypass passage. Moreover, in the technique described in Patent Document 2, the guide member is provided at a specific air outlet called a differential air outlet, and therefore, the mixing property cannot be improved for other air outlets. Although it is conceivable to provide the same guide member for each of the other outlets, there are problems that the number of parts increases and the apparatus becomes large.

  Therefore, the present invention has been made in view of the above-described problems, and provides a vehicle air conditioner that can improve the mixing of cold air and hot air in an air conditioning case with a simple configuration. Objective.

  The present invention employs the following technical means in order to achieve the aforementioned object.

In invention of Claim 1, the air-conditioning case (12) which forms an air passage (15) inside,
A blower for blowing air into the air conditioning case;
A cooling heat exchanger (13) that is provided in the air conditioning case and cools the air blown by the blower;
A heating heat exchanger (14) provided in the air conditioning case for heating the air that has passed through the cooling heat exchanger;
A cold air passage (16) formed in the air conditioning case and through which the cold air that has passed through the cooling heat exchanger without passing through the heating heat exchanger flows;
A hot air passage (21, 23, 24) formed in the air conditioning case and through which the hot air after passing through the heat exchanger for heating flows,
An air mix means (17) provided in the air conditioning case for adjusting the amount of air passing through the heat exchanger for heating and the amount of air flowing through the cold air passage;
A mixing chamber (18) provided in the air conditioning case, in which hot air from the hot air passage and cold air from the cold air passage are mixed;
A plurality of outlet openings (31 to 33) that are provided in the air conditioning case and blow out the conditioned air mixed in the mixing chamber toward a plurality of locations in the vehicle interior;
The hot air and the cold air are merged at the merged portion (18a) located on the upstream side in the mixing chamber,
The cold air passage guides the cold air to intersect the warm air at the junction,
The warm air passage
A warm air confluence passageway (21) for guiding the warm air to the confluence,
It is a passage formed inside the cylindrical body that is arranged so as to cross the merging portion and extends in the merging direction of the warm air, and the warm air flowing through the cylindrical body is downstream of the merging portion in the merging direction of the warm air A hot air tunnel passage (23) leading to
A passage communicating with the mixing chamber and the hot air tunnel passage, in which the warm air flowing through the hot air tunnel passage flows in and the merged portion and the cylindrical body are arranged in a line and intersects the cold air flow direction. A hot air diffusion passage (24) extending in the alignment direction,
The warm air diffusion passage
A first wall portion (26) extending in the alignment direction and the cold air flow direction and partitioning the merged portion and the hot air diffusion passage;
A second wall portion (27) extending in the arrangement direction and the flow direction of the cold air and positioned at a downstream side of the first wall portion on the downstream side in the merging direction of the hot air;
Extending in the direction of alignment and the direction of hot air merging, and surrounded by a bottom portion (28) connecting ends positioned upstream of the first wall portion and the second wall portion in the flow direction of the cold air,
The hot air diffusion passage is a vehicle air conditioner that guides the hot air flowing from the hot air tunnel passage in a direction along the first wall portion and the second wall portion and leads to the mixing chamber. .

  According to invention of Claim 1, the warm air which flowed down the warm air confluence | merging path | route joins the cold air which flowed through the cold air | gas channel | path in the confluence | merging part. Further, the warm air flowing down the warm air tunnel passage is diffused in the direction of alignment at the downstream side of the joining portion of the warm air in the joining portion by the warm air diffusion passage, and is guided to the mixing chamber. Since the hot air diffusion passage is partitioned by the joining portion and the first wall portion, the hot air diffusion passage is guided to the mixing chamber without joining the cool air at the joining portion. Therefore, the cool air that has flowed down the cool air passage merges with the warm air from the upstream side in the joining direction that has flowed through the warm air confluence passage at the confluence, and further, the temperature that has flowed through the hot air diffusion passage in the mixing chamber. It is sandwiched by warm air from the downstream side of the wind merging direction. Further, the temperature at the upstream side in the merging direction in the merging portion becomes higher due to the merging hot air due to the merging at the merging portion of the warm air and the cold air flowing through the warm air merging passage. The wind is difficult to mix. Therefore, since the warm air flowing down the warm air diffusion passage flows down the merging direction downstream side of the merging portion and is guided to the mixing chamber, it can be mixed with the cold air having a low temperature in the mixing chamber. Therefore, the temperature distribution can be made uniform in the merging direction and the arrangement direction. And it can blow out toward the vehicle interior from a blowing opening part by making mixed air into an air conditioning wind. Therefore, the mixed conditioned air can flow down regardless of the position of the blowout opening. Thus, in the vehicle air conditioner of the present invention, the mixability of cold air and hot air can be improved in the air conditioning case with a simple configuration.

  The invention according to claim 2 is characterized in that a plurality of cylindrical bodies are provided at intervals in the arrangement direction.

  According to the invention described in claim 2, a plurality of cylindrical bodies are provided at intervals in the arrangement direction. Therefore, it can be distributed in the arrangement direction and sent from the hot air tunnel passage to the hot air diffusion passage. Further, in the merging portion, the warm air from the tail warm air merging passage can be distributed in the direction of alignment by the interval between the adjacent cylindrical bodies at the portion where the warm air and the cold air merge, and can be guided to the merging portion. Thereby, the mixing property in the alignment direction can be further improved.

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

It is sectional drawing of the vehicle air conditioner 10 of 1st Embodiment. It is the II-II sectional view taken on the line in FIG. 2 is a perspective view showing a hot air grid 20. FIG. It is sectional drawing of the vehicle air conditioner 10 in the state of a bilevel mode. It is sectional drawing of the vehicle air conditioner 10 in the state of foot mode. It is sectional drawing of the vehicle air conditioner 10 in the state of a foot / diff mode. It is sectional drawing of the vehicle air conditioner 10 in the state of a defroster mode.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a sectional view of a vehicle air conditioner 10 according to the first embodiment. First, the whole structure of the vehicle air conditioner 10 of this embodiment is demonstrated. The vehicle air conditioner 10 includes an indoor air conditioning unit (not shown). The indoor air conditioning unit is disposed inside a vehicle instrument panel (not shown) at the foremost part of the vehicle interior. The indoor air conditioning unit has a blower unit (not shown) and an air conditioning main unit 11 shown in FIG.

  The air conditioning main unit 11 is disposed at the approximate center in the left-right direction of the vehicle. The blower unit is arranged with a predetermined dimension away from the air conditioning body unit 11 on the passenger seat side. The blower unit has an inside / outside air switching box and a blower for switching and introducing the inside and outside air, and the introduced air is blown to the air conditioning main unit 11 by the blower.

  As shown in FIG. 1, the air conditioning main unit 11 houses an evaporator 13 and a heater core 14 inside an air conditioning case 12. The air conditioning case 12 has an air passage 15 formed therein and is made of a resin material. A blower unit is provided in front of the air conditioning case 12 (left side in FIG. 1), and air is blown into the air conditioning case 12 from the blower unit.

  The evaporator 13 is a cooling heat exchanger that cools air by exchanging heat between the refrigerant passing through the inside of the evaporator 13 and the air flowing through the air conditioning case 12. The evaporator 13 is arrange | positioned at the front side inside the air conditioning case 12, and cools the air ventilated from the air blower unit. Therefore, the air that has passed through the evaporator 13 flows as cold air.

  The heater core 14 is a heat exchanger for heating that heats air by exchanging heat between a refrigerant passing through the inside, for example, engine coolant and air that has passed through the evaporator 13. Therefore, the air that has passed through the heater core 14 flows as warm air. The heater core 14 is disposed behind the evaporator 13 (on the right side in FIG. 1) and below the air conditioning case 12. A hot air merging passage 21 through which hot air from the heater core 14 flows is formed on the rear side of the heater core 14 in the air conditioning case 12.

  A cold air passage 16 is formed above the evaporator 13 in the air conditioning case 12 so as to bypass (bypass) the heater core 14 and allow the cold air from the evaporator 13 to flow. The cold air passage 16 extends upward from the evaporator 13.

  Between the evaporator 13 and the heater core 14 in the air conditioning case 12, an air mix door 17 that adjusts the ratio between the amount of air flowing through the heater core 14 and the amount of air flowing through the cold air passage 16 is disposed. The air mix door 17 is comprised by the rotation door, for example.

  Air that is a mixing chamber that mixes cold air from the cold air passage 16 and hot air from the heater core 14 on the rear side of the evaporator 13 in the air conditioning case 12 and downstream of the heater core 14 to collide with each other. A mix chamber 18 is formed.

  In the air conditioning case 12, a plurality of outlet openings 31 to 33 that blow out the conditioned air mixed in the air mix chamber 18 toward a plurality of locations in the vehicle interior are provided. Accordingly, the blowout openings 31 to 33 are provided on the air flow downstream side of the air mix chamber 18. In the present embodiment, a defroster opening 31, a face opening 32, and a foot opening 33 are provided as the plurality of blowing openings 31 to 33. The defroster opening 31 is for blowing conditioned air to the inner surface of the front window glass. The face opening 32 is for blowing out the conditioned air toward the passenger's upper body. The foot opening 33 is for blowing the conditioned air toward the feet of the occupant.

  The air conditioning case 12 is provided with a blowing mode door that selects and opens and closes the plurality of blowing openings 31 to 33. Specifically, a face / foot door 34 that opens and closes the face opening 32 and the foot opening 33 and a defroster door 35 that opens and closes the defroster opening 31 are provided. The face / foot door 34 and the defroster door 35 are configured by a plate door having a plate-like door main body portion that opens and closes the blowout openings 31 to 33 and a rotation shaft that rotates the door main body portion.

  Next, the warm air grid 20 will be described. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is a perspective view showing the warm air grid 20. The hot air grid 20 is provided to mix cold air and hot air. In FIG. 2, for easy understanding, the flow of hot air is indicated by an arrow, and the illustration of the flow of cold air is omitted. In FIG. 3, for easy understanding, the flow of hot air is indicated by solid arrows, and the flow of cold air is indicated by broken arrows. Hereinafter, the direction crossing the flow direction X (vertical direction in FIG. 1) of the hot air grid 20 of the cold air, specifically, the direction orthogonal to the cold air passage 16 and the direction crossing the cold air passage 16 is defined as the hot air merging direction Y (FIG. 1 and the direction perpendicular to the flow direction X and the warm air merging direction Y may be referred to as an alignment direction Z (a direction perpendicular to the paper surface of FIG. 1).

  The hot air grid 20 is provided between the air mix door 17 and the air mix chamber 18 in the air conditioning case 12. The hot air grid 20 is formed integrally with the same resin material as the air conditioning case 12, for example, or formed separately from the air conditioning case 12 and then fixed to the air conditioning case 12.

  The hot air grid 20 is provided at the outlet of the hot air merging passage 21 through which the hot air from the heater core 14 flows. The hot air grid 20 is provided so as to cross the cold air passage 16. In other words, the hot air grid 20 is a portion where the flow direction X of the cold air from the cold air passage 16 intersects the direction in which the hot air blows out from the hot air merging passage 21, and is more air than the movable range of the blow mode door. Located upstream of the flow. The intersecting portion is a merged portion 18a located on the upstream side in the air mix chamber 18, and is a portion where hot air and cold air merge. The blowing direction of the cold air from the cold air passage 16 to the hot air grid 20 is the upper side in FIG. 1, and the blowing direction of the hot air from the hot air confluence passage 21 to the cold air passage 16 is the left side in FIG. Therefore, the blowing direction of the cold air from the cold air passage 16 and the blowing direction of the hot air from the hot air merging passage 21 intersect each other. Accordingly, the cold air passage 16 guides the cold air to intersect the warm air at the junction 18a.

  The hot air grid 20 has a hot air tunnel passage 23 and a hot air diffusion passage 24 as a passage independent of the cold air passage 16 through which a part of the hot air flowing down the hot air confluence passage 21 passes. The hot air tunnel passage 23 is disposed so as to cross the joining portion 18a. The hot air tunnel passage 23 is a passage formed inside the cylindrical body 23a extending in the hot air merging direction Y. The warm air tunnel passage 23 guides the warm air flowing in the cylindrical body 23a to the downstream side in the warm air merging direction Y with respect to the merging portion 18a. In other words, the hot air tunnel passage 23 crosses in the hot air merging direction Y so as to block a part of the merging portion 18a, and is connected to the hot air diffusion passage 24 located on the other side of the cold air passage 16 in the hot air merging direction Y. Guide hot air. A plurality of the cylindrical bodies 23a are provided in the warm air merging direction Y, and are provided at intervals in the arrangement direction Z (left-right direction in FIG. 2), and three in the present embodiment. The three hot air tunnel passages 23 are respectively provided at the center of the arrangement direction Z and at both ends of the arrangement direction Z. Of the outer wall of the cylindrical body 23a, the surface portion on the air mix door 17 side (lower side in FIG. 3) is preferably formed in a streamlined shape, and the corner portion is rounded in this embodiment. As a result, it is possible to reduce the ventilation resistance generated when the cold air flows between the cylindrical bodies 23a, which are adjacent confluence portions 18a, by the streamlined outer wall.

  Therefore, the interval between the adjacent cylindrical bodies 23a is the interval in the alignment direction Z, and this interval is the joining portion 18a. Further, a plurality of guide plates 25 for guiding the cool air and the warm air to the air mix chamber 18 are provided at the junction 18a, and two guide plates 25 are provided at intervals in this embodiment. The guide plate 25 extends in the warm air merging direction Y and the flow direction X. As a result, the cold air is guided in the flow direction X (upward in FIG. 3).

  The merging portion 18a through which the warm air merging passage 21 guides the warm air merges with the cold air passage 16 from one side (the lower side in FIG. 2) in the warm air merging direction Y toward the other side (the upper side in FIG. 2). It is a part. Specifically, the part where the warm air merging passage 21 guides the warm air is the interval in the arrangement direction Z.

  The hot air diffusion passage 24 is a passage extending in the alignment direction Z, and is located downstream of the hot air tunnel passage 23 (the other side in the hot air merging direction Y). The hot air diffusion passage 24 communicates with the hot air tunnel passage 23 and the air mix chamber 18. Therefore, the warm air that has passed through the warm air tunnel passage 23 merges in the warm air diffusion passage 24. The warm air diffusion passage 24 is open in the flow direction X. Accordingly, the hot air diffusion passage 24 is formed in a substantially U-shaped cross section, and a portion where the warm air flows from the hot air tunnel passage 23 is open, but the other portions adjacent to the merging portion 18a and the cold air passage 16 are open. A partition wall 26 which is a first wall portion separating the hot air diffusion passage 24 is provided. Further, the hot air diffusion passage 24 is arranged on the opposite side to the portion (partition wall 26) through which the hot air flows from the hot air tunnel passage 23, with the arrangement direction Z and the flow direction X ( A wall portion 27 (second wall portion) extending in the thickness direction of FIG. 2 is provided. The wall portion 27 is an inner wall of the air conditioning case 12 in the present embodiment. Further, it has a bottom portion 28 that extends in the arrangement direction Z and the hot air merging direction Y and connects the end portion located upstream in the flow direction X (downward in FIG. 1) between the partition wall 26 and the wall portion 27. Therefore, the warm air diffusion passage 24 is surrounded by the partition wall 26, the wall portion 27, and the bottom portion 28. Therefore, the warm air flowing into the warm air diffusion passage 24 is guided in the flow direction X by the partition wall 26 and the wall portion 27 without flowing into the joining portion 18a. The hot air diffusion passage 24 guides the warm air flowing from the hot air tunnel passage 23 in a direction along the partition wall 26 and the wall portion 27 and guides it to the air mix chamber 18.

  Next, the flow of hot air and cold air will be described. The warm air immediately after passing through the heater core 14 is first guided to the warm air grid 20 by the warm air merging passage 21. Then, at the outlet of the warm air merging passage 21, a part of the warm air flows into the warm air tunnel passage 23, and the other warm air flows into the interval between the cylindrical bodies 23a, that is, the merging portion 18a. The warm air that has flowed into the merging portion 18 a merges with the cold air that has flowed through the cold air passage 16, is guided in the flow direction X of the cold air by the pressure of the cold air, and flows into the air mix chamber 18.

  Further, the warm air flowing down the warm air tunnel passage 23 is merged in the warm air diffusion passage 24 and guided in the flow direction X by the wall portion 27. The warm air guided in the flow direction X is mixed in the air mix chamber 18 with the cold air that has flowed down through the adjacent merged portion 18a. Thus, the cool air and the warm air that have passed through the warm air grid 20 are mixed in the alignment direction Z and the warm air merging direction Y.

  Next, the blowing mode will be described. In the vehicle air conditioner 10 of the present embodiment, there are, for example, a face mode, a bi-level (B / L) mode, a foot mode, a foot / defroster mode, and a defroster mode as the blowing mode.

  First, the face mode will be described. The face mode is a mode in which air-conditioned air is blown mainly toward the passenger's upper body. In the face mode, as shown in FIG. 1, the face / foot door 34 is arranged at a position where the face opening 32 is in an open state and the foot opening 33 is in a closed state. Further, the defroster door 35 is arranged at a position where the defroster opening 31 is closed. As a result, the air mixed by the hot air grid 20 flows into the air mix chamber 18, and the conditioned air is blown from the air mix chamber 18 through the face opening 32 into the vehicle interior.

  Next, the bilevel mode will be described. The bi-level mode is a mode in which conditioned air is blown toward the passenger's upper body and the feet of the passenger. FIG. 4 is a cross-sectional view of the vehicle air conditioner 10 in the bilevel mode. In the bi-level mode, as shown in FIG. 4, the face / foot door 34 is arranged at a position where the face opening 32 and the foot opening 33 are opened. Further, the defroster door 35 is arranged at a position where the defroster opening 31 is closed. As a result, the air mixed by the hot air grid 20 flows into the air mix chamber 18, and the conditioned air is blown from the air mix chamber 18 through the face opening 32 and the foot opening 33 into the vehicle interior.

  Next, the foot mode will be described. The foot mode is a mode in which air conditioned air is blown mainly toward the passenger's feet. FIG. 5 is a cross-sectional view of the vehicle air conditioner 10 in the foot mode state. In the foot mode, as shown in FIG. 5, the face / foot door 34 is arranged at a position where the face opening 32 is closed and the foot opening 33 is opened. Further, the defroster door 35 is arranged at a position where the defroster opening 31 is in an open state and air slightly flows through the defroster opening 31. As a result, the air mixed by the hot air grid 20 flows into the air mix chamber 18, and the conditioned air is blown from the air mix chamber 18 through the defroster opening 31 and the foot opening 33 into the vehicle interior. The defroster opening 31 is located at a position facing the warm air diffusion passage 24. Therefore, depending on the opening degree of the defroster door 35, mainly air from the hot air diffusion passage 24 flows into the defroster opening 31. Thereby, a temperature difference can be given between the defroster opening 31 and the foot opening 33.

  Next, the foot / defroster mode will be described. The foot / defroster mode is a mode in which conditioned air is blown toward the front window glass and the feet of the passenger. FIG. 6 is a cross-sectional view of the vehicle air conditioner 10 in the foot / defroster mode. In the foot / defroster mode, as shown in FIG. 6, the face / foot door 34 is disposed at a position where the face opening 32 is closed and the foot opening 33 is opened. Further, the defroster door 35 is disposed at a position where the defroster opening 31 is open. As a result, the air mixed by the hot air grid 20 flows into the air mix chamber 18, and the conditioned air is blown from the air mix chamber 18 through the defroster opening 31 and the foot opening 33 into the vehicle interior.

  Next, the defroster mode will be described. The defroster mode is a mode in which conditioned air is blown toward the front window glass. FIG. 7 is a cross-sectional view of the vehicle air conditioner 10 in the defroster mode. In the defroster mode, as shown in FIG. 7, the face / foot door 34 is arranged at a position where the face opening 32 is closed. Further, the defroster door 35 is arranged at a position where the defroster opening 31 is in the open state and the foot opening 33 is in the closed state. As a result, the air mixed by the hot air grid 20 flows into the air mix chamber 18, and the conditioned air is blown from the air mix chamber 18 through the defroster opening 31.

  As described above, in the vehicle air conditioner 10 of the present embodiment, the warm air that has flowed down the warm air merging passage 21 merges with the cold air that has flowed through the cold air passage 16 at the merging portion 18a. The warm air flowing down the warm air tunnel passage 23 is diffused in the alignment direction Z on the downstream side in the warm air merging direction Y of the merging portion 18 a by the warm air diffusion passage 24 and guided to the air mix chamber 18. Since the hot air diffusion passage 24 is partitioned by the joining portion 18a and the partition wall 26, the hot air diffusion passage 24 is guided to the air mix chamber 18 without joining the cold air at the joining portion 18a. Therefore, the cool air flowing down the cool air passage 16 is merged with the warm air from the upstream side in the merge direction Y flowing through the warm air confluence passage 21 in the confluence portion 18a. The hot air flowing through the diffusion passage 24 is sandwiched between hot air from the downstream side Y in the merging direction Y. Further, due to the merging of the warm air and the cold air flowing through the warm air merging passage 21 in the merging portion 18a, the temperature on the upstream side of the merging direction Y in the merging portion 18a is increased by the warm air that is merged. The cold air and hot air on the other side are difficult to mix. Therefore, since the warm air flowing down the warm air diffusion passage flows downstream in the merging direction Y of the merging portion 18a and is guided to the air mix chamber 18, it can be mixed in the air mix chamber 18 with the cold air having a low temperature. Therefore, in the merging direction Y and the arrangement direction Z, the temperature distribution can be made close to uniform. And it can blow out toward the vehicle interior from the blowing opening parts 31-33 by making the mixed air into an air conditioning wind. Therefore, the mixed conditioned air can flow down regardless of the positions of the blowout openings 31 to 33. Thus, in the vehicle air conditioner 10 of the present embodiment, the mixability of the cold air and the hot air can be improved in the air conditioning case 12 with a simple configuration.

  In the present embodiment, a plurality of cylindrical bodies 23 a are provided at intervals in the arrangement direction Z, and merge into the hot air diffusion passage 24 that extends in the arrangement direction Z. Therefore, the hot air can be more uniformly dispersed and sent to the hot air diffusion passage 24 located downstream of the merging portion 18a in the hot air merging direction Y. Further, the joining portion 18a is an interval in the arrangement direction Z, and a portion where the warm air confluence passage 21 guides the hot air is an interval in the arrangement direction Z. Therefore, it is possible to disperse the arrangement direction Z in the portion where the hot air merging passage 21 merges with the cold air passage 16. Thereby, the mixing property in the arrangement direction Z can be further improved.

  In other words, in this embodiment, the warm air is guided by the warm air grid 20 to the inner wall (wall portion 27) of the air conditioning case 12 on the other side through the joining portion 18a. Then, the guided warm air is dispersed in the arrangement direction Z which is the case width direction. Then, the warm air dispersed in the alignment direction Z is guided to the air mix chamber 18 along the inner wall of the air conditioning case 12. At this time, the hot air and the cool air are separated by the partition wall 26 in the hot air diffusion passage 24 so that the hot air dispersed in the width direction along the case wall surface is not diffused by the cool air. Since the hot air grid 20 is located on the upstream side of the air mix chamber 18, the hot air guided to the hot air diffusion passage 24 is dispersed in the width direction in all the blowing modes, and is directly blown along the case wall surface. Guided to the exit.

  As a result, warm air is obtained from the entire width of the air conditioning case 12 (the entire region in the alignment direction Z), so that temperature variations in the alignment direction Z can be reduced. Moreover, it becomes the form enclosed with a warm air before and behind the warm air confluence | merging direction Y with respect to a cold wind, and while mixing property improves, the temperature variation before and behind can be made small.

  Further, by selecting the shape such as the height of the partition wall 26 constituting the hot air diffusion passage 24, the amount of air flowing into the defroster opening 31 from the hot air diffusion passage 24 can be adjusted. In this way, by selecting the shapes of the wall 27 and the partition wall 26 constituting the hot air diffusion passage 24, the temperature difference between the defroster opening 31 and the other openings can be adjusted.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In the first embodiment described above, the defroster opening 31, the face opening 32, and the foot opening 33 serving as the front seat opening have been described as the blowout openings 31 to 33, but the rear seat face opening is described as an example. The vehicle air conditioner 10 provided with a part and a foot opening may be used. For example, even in the case where conditioned air is blown out simultaneously from all the blowing openings of the front seat opening and the rear seat opening, by applying the present invention, the control characteristics of the blowing air temperature in all the blowing openings can be obtained. It can be close to the same level.

  In the first embodiment described above, the warm air flowing down the warm air merging passage 21 flows into the warm air tunnel passage 23. However, the present invention is not limited to this configuration, and the warm air merging passage 21 and the warm air tunnel are not limited thereto. The passage 23 may be provided in parallel. In other words, the hot air that has passed through the heater core 14 may be branched into the hot air merging passage 21 and the hot air tunnel passage 23.

  In the first embodiment described above, one air mix chamber 18 and one air mix door 17 are provided, and the conditioned air is led from the one air mix chamber 18 to the respective blowing openings on the driver's seat side and the passenger seat side. Although it is a structure, this invention is applicable also to the structure provided with the air mix chamber and air mix door for driver's seat sides, and the air mix chamber and air mix door for passenger seat sides. In this case, the hot air grid 20 is installed for each air mix chamber.

  In the first embodiment described above, the air mix door 17 is used as the air mix means. However, the present invention is not limited to the air mix door 17 and may be configured to change the flow rate and change the distribution ratio. . Moreover, although the revolving door was employ | adopted as the air mix door 17, you may employ | adopt other types of doors, such as a slide door, a rotary door, and a film door.

  In the first embodiment described above, the heater core 14 has a configuration in which engine cooling water is used as a heat source. However, the configuration is not limited to such a configuration, and a heating element such as a PTC heater may be used as another heat source. .

DESCRIPTION OF SYMBOLS 10 ... Vehicle air conditioner 11 ... Air-conditioning main body unit 12 ... Air conditioning case 13 ... Evaporator (heat exchanger for cooling)
14 ... Heater core (heat exchanger for heating)
15 ... Air passage 16 ... Cool air passage 17 ... Air mix door (air mix means)
18 ... Air mix chamber (mixing chamber)
18a ... Junction portion 20 ... Warm air grid 21 ... Warm air confluence passage 23 ... Warm air tunnel passage 24 ... Warm air diffusion passage 25 ... Guide plate 26 ... Bulkhead (first wall)
27 ... Wall (second wall)
28 ... Bottom 31 ... Defroster opening (outlet opening)
32 ... Face opening (blowing opening)
33 ... Foot opening (blowing opening)
X ... flow direction Y ... warm air merging direction (warm air merging direction)
Z ... Alignment direction

Claims (2)

An air conditioning case (12) forming an air passage (15) therein;
A blower for blowing air into the air conditioning case;
A cooling heat exchanger (13) that is provided in the air conditioning case and cools the air blown by the blower;
A heating heat exchanger (14) that is provided in the air conditioning case and heats the air that has passed through the cooling heat exchanger;
A cold air passage (16) formed in the air conditioning case and through which the cold air having passed through the cooling heat exchanger flows without passing through the heating heat exchanger;
A hot air passage (21, 23, 24) formed in the air conditioning case and through which the hot air after passing through the heat exchanger for heating flows;
An air mixing means (17) provided in the air conditioning case, for adjusting the amount of air passing through the heat exchanger for heating and the amount of air flowing through the cold air passage;
A mixing chamber (18) provided in the air conditioning case, in which hot air from the hot air passage and cold air from the cold air passage are mixed;
A plurality of outlet openings (31 to 33) that are provided in the air conditioning case and blow out the conditioned air mixed in the mixing chamber toward a plurality of locations in the vehicle interior;
The hot air and the cold air are merged at the merged portion (18a) located on the upstream side in the mixing chamber,
The cold air passage guides the cold air so as to intersect the warm air at the joining portion,
The warm air passage is
A warm air merging passage (21) for guiding the warm air to the merging portion;
A passage formed inside a cylindrical body that is arranged so as to cross the merging portion and extends in the merging direction of the warm air, and the hot air flowing through the cylindrical body is sent to the merging portion with respect to the warm air. A hot air tunnel passage (23) that leads to the downstream side of the merging direction of
A passage communicating with the mixing chamber and the hot air tunnel passage, in which warm air flowing through the hot air tunnel passage flows in, and the merged portion and the cylindrical body are aligned with each other, and the cold air Hot air diffusion passages (24) extending in the direction of alignment intersecting the flow direction of
The warm air diffusion passage is
A first wall portion (26) extending in the arrangement direction and the cold air flow direction and partitioning the merged portion and the hot air diffusion passage;
A second wall portion (27) extending in the arrangement direction and the flow direction of the cold air, and positioned at a distance downstream of the first wall portion in the direction of merging of the warm air;
A bottom portion (28) extending in the arrangement direction and the merging direction of the warm air and connecting an end portion of the first wall portion and the second wall portion located on the upstream side in the cold air flow direction; Surrounded,
The warm air diffusion passage guides the warm air flowing from the warm air tunnel passage in a direction along the first wall portion and the second wall portion, and guides it to the mixing chamber. Air conditioner.   The vehicle air conditioner according to claim 1, wherein a plurality of the cylindrical bodies are provided at intervals in the arrangement direction.

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