JP5359702B2 - Air conditioner for vehicles - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular air conditioner securing mixing of cold air with hot air and obtaining sufficient temperature difference among a plurality of blown air streams. <P>SOLUTION: An air mix door 6 arranged inside an air conditioning case 2 of the vehicular air conditioner 1 includes guide walls 61, 62 forming a plurality of passages on the surface of a door body 60 so that a plurality of air streams flow separatedly on the surface of the door body 60. In a passage formed by the guide walls 61, 62, the cross-sectional area downstream of one air stream is smaller than the cross-sectional area upstream of the other air stream. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a vehicle air conditioner having an operation mode in which conditioned air is blown out to the vicinity of the upper body of a passenger and the vicinity of the feet.

  Conventionally, an apparatus described in Patent Document 1 is known as a vehicle air conditioner having a configuration capable of adjusting the temperature of a blowout air near the upper body of an occupant and a blowout air near a foot.

  The conventional apparatus promotes the mixing of the cold air and the hot air by changing the direction of the cold air that has passed through the evaporator and the warm air that has passed through the heater core by a guide member provided on the surface of the air mix door. . As a result, cold air and hot air are mixed in a suitable state in the mixing section, and for example, in the bi-level mode, it is possible to reduce the temperature difference between the air blown simultaneously from a plurality of blowing passages. Air conditioning that does not cause discomfort can be provided.

  Specifically, the guide member includes a plurality of first wall portions that are configured to stand up from the surface of the door main body on the downstream side of the cold air in the door main body and change the air direction toward the mixing portion when the cold air collides with the first wall portion in the door main body. A plurality of second wall portions that change in the air direction toward the mixing portion when the hot air collides in a shape standing from the surface of the door body on the side opposite to the one wall portion, and the first wall portion and the second wall portion are alternately connected. The labyrinth structure which consists of several 3rd wall parts is exhibited.

  The cold air is divided into layers by the plurality of third wall portions of the guide member when flowing through the surface of the air mix door, and then the traveling direction is changed to the mixing portion side by the plurality of first wall portions. On the other hand, when the hot air flows on the surface of the air mix door simultaneously with the cold air, it is divided into layers by the plurality of third wall portions of the guide member, and then the traveling direction is changed to the mixing portion side by the plurality of second wall portions. Is done. As described above, since the cold air and the warm air are both directed to the mixing portion side after being formed into a plurality of laminar flows on the surface of the door body, the plurality of flows are mixed on the mixing portion side, thereby improving the mixing property. Moreover, the protrusion amount from the door main body surface in the center part of a 3rd wall part is set smaller than the protrusion amount in the 1st wall part and 2nd wall part vicinity. For this reason, since the cold air and the warm air are mixed beyond the third wall portion in the central portion, the mixing property is further improved.

JP 2005-35375 A

  Although the conventional vehicle air conditioner can ensure the mixing of cold air and hot air in the vicinity of the air mix door, on the other hand, in the case of a device having a long distance from the air mix door to each blowing passage, It becomes difficult for the mixed air of the mixed cold air and hot air to reach each blowing passage, and it is impossible to provide the air-conditioning air in which appropriate mixing property is ensured to each blowing passage.

  On the other hand, for example, for the face blowing and foot blowing in the bi-level mode, it is required to ensure the mixing of the cold air and the hot air and to have an appropriate temperature difference between the two air bubbles. That is, both air blows are air conditioned air with which mixing is ensured, the face air blow is air that feels cool, and the foot air blow is air that feels warm and has high comfort.

  Therefore, the present invention has been made in view of the above problems and requirements, and an object of the present invention is to ensure the mixing of cold air and hot air and to obtain a sufficient temperature difference between a plurality of blowing airs. Is to provide a device.

  The present invention employs the following technical means to achieve the above object. In addition, the code | symbol in the parenthesis as described in a claim and each following means shows the correspondence with the specific means as described in embodiment mentioned later as one aspect.

Claim 1 includes an air conditioning case (2) in which a cold air passage (5) through which cold air flows, a hot air passage (8) through which hot air flows, and a mixing section (9) in which cold air and hot air are mixed, and an air conditioning Cooling means (4) provided in the case for cooling the air and supplying cold air to the cold air passage downstream, and air supplied in the air conditioning case for supplying the hot air to the downstream hot air passage A heating means (7), an air mix door (6) for adjusting the air volume ratio of cold air and hot air to be mixed in the mixing unit by the opening degree of the door body (60), and a plurality of predetermined parts connected to the mixing unit in the passenger compartment A plurality of blowing passages (11, 13, 15) formed in the air conditioning case for blowing air conditioned to each of the vehicle air conditioners,
Air mix door, so that the air flow is divided into a plurality in the door body surface, has air guide unit for forming a plurality of passages (68, 69) on the door body surface (61, 62), an air guide portion Is a plate-like shape that protrudes from the surface of the door body and extends from the upstream side of the air flow toward the downstream side of the air flow and forms a plurality of passages that are open on the side away from the door body surface. The plurality of guide walls (61, 62) are included, and the intervals between the plurality of guide walls are narrower on the downstream side of the air flow than on the upstream side of the air flow. The passage cross-sectional area on the downstream side of the air flow is smaller than the cross-sectional area on the upstream side of the air flow ,
The plurality of passages formed by the air guide part are divided into a plurality of cold airs flowing through the cold air passages and flow from the first air passage (68) flowing from the larger one of the passage cross-sectional areas to the smaller one and the hot air passage. And a second passage (69) in which the warm air flows in the opposite direction to the cold air from the larger passage cross-sectional area to the smaller passage .

  According to this invention, when the air flowing along the door main body surface of the air mix door passes through the plurality of passages formed by the air guide portion, the passages are restricted on the downstream side. On the downstream side, the wind speed increases compared to the upstream side. As a result, the air whose wind speed has been increased by the air guide portion easily reaches a predetermined blowing passage among the plurality of blowing passages. Therefore, for example, in a mode in which conditioned air is blown out from a plurality of blowing passages such as the bi-level mode, cold air that reaches a predetermined blowing passage by cold air or hot air whose wind speed has increased on the downstream side by the air guide portion. Or, because the amount of warm air increases, the predetermined blow-out passage is supplied with air that has a higher cooling or warm feeling, providing air-conditioning that ensures a temperature difference between the air outlets in the passenger compartment. it can. That is, by such an air mix door, it is possible to provide a vehicle air conditioner that can ensure mixing of cold air and hot air and can obtain a sufficient temperature difference between a plurality of blowing airs.

Further , according to the present invention, the air guide portion causes the cold air to increase at the downstream side of the first passage more than the upstream side, and the cold air is appropriately mixed with the warm air at the mixing portion by the air mix door. Since the air speed is increased and the wind speed is increased, low-temperature cold air easily reaches, for example, the face blowing passage among the plurality of blowing passages. Also, the air guide portion causes the warm air to increase in wind speed on the downstream side of the second passage as compared to the upstream side, and the warm air is mixed with the cool air at the mixing portion by the air mix door and the temperature is appropriately adjusted. At the same time, since the wind speed increases, the warm air easily reaches, for example, the differential blowing passage among the plurality of blowing passages. Therefore, for example, as in the bi-level mode, the cool air that reaches the face blowing passage formed in the air-conditioning case in order to blow cool air into the passenger compartment increases to give coolness near the upper body of the occupant and blow out warm air Therefore, warm air and cold air mixed properly in the mixing section flow into the foot blowing passage formed in the air conditioning case to give warmth near the feet of the occupants, ensuring a sufficient temperature difference for the occupants It can provide air conditioning with so-called cold head heat.

According to the second aspect of the present invention, the passage formed between the plurality of guide walls further includes a barrier portion (64) intersecting with the guide wall, and the barrier portion has a protrusion height from the surface of the door body as a guide. It is characterized by being lower than the wall. According to the present invention, in addition to the effect of increasing the wind speed by the air guide portion of each of the above inventions, the following operational effects can be obtained. One of the cold air and the hot air flowing through the passage between the plurality of guide walls is increased in wind speed by the restriction of the passage cross-sectional area, and part of the air collides with the barrier portion and flows away from the door body surface. Therefore, the mixing with the other air proceeds by this flow, and the air mix effect can be further improved. Therefore, it is possible to provide an air mix door that can achieve both the achievement of the temperature difference between the plurality of outlets due to the increase in the wind speed and the air mix effect.

According to invention of Claim 3 , a barrier part is the 1st barrier part (63) located in the air flow downstream, and the 2nd barrier part (64) located in the upstream rather than the said 1st barrier part. The first barrier portion (63) is characterized in that the protruding height from the door body surface is lower than that of the second barrier portion (64).

According to the present invention, since the protruding height of the first barrier portion located downstream of the air flow is lower, while ensuring the effect of increasing the wind speed by reducing the passage cross-sectional area on the downstream side, the upstream Mixing with the other air can be expected at the second barrier portion located on the side. Therefore, it is possible to provide an air mix door that can achieve both the achievement of the temperature difference between the plurality of outlets due to the increase in the wind speed and the air mix effect.
According to the fourth aspect of the present invention, the air that has flowed through the cold air passage is divided into a plurality of passages that are formed by the air guide portion.

According to the fifth aspect of the present invention, the wind direction adjusting door is provided on the downstream side of the cold air passage and the hot air passage, and adjusts the direction of the air flowing through the cold air passage and the direction of the air flowing through the hot air passage. The air direction adjusting door further includes an air guide portion (61) that forms a plurality of passages on the surface of the door main body so that the air flowing from the upstream side is divided and flows in the door main body (60). 62) on both sides of the door body, and the passage formed by the air guide portion of the airflow direction adjusting door has a passage cross-sectional area on the downstream side of the air flow smaller than a cross-sectional area on the upstream side of the air flow. It is characterized by that.

  According to the present invention, when at least one of the cool air and the warm air flowing along the door body surface of the air direction adjusting door passes through the plurality of passages formed by the air guide portion, the passage is provided on the downstream side. As a result of the restriction, the wind speed increases on the downstream side of the passage more than on the upstream side. As a result, the air whose wind speed has been increased by the air guide portion easily reaches a predetermined blowing passage among the plurality of blowing passages. Therefore, a more reliable temperature difference between the blowout passages can be ensured by the wind speed increasing effect by the air mix door and the wind speed increasing effect by the wind direction adjusting door. For example, in a mode in which conditioned air is blown out from a plurality of blowing passages such as the bi-level mode, cold air or hot air whose wind speed has increased by an air mix door and a wind direction adjusting door is either cold air or hot air that reaches a predetermined blowing passage or Since the air volume of the warm air increases, air with a higher cooling feeling or warm air feeling is supplied to the predetermined blow-out passage, and an improvement in passenger comfort can be expected.

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

It is the schematic diagram which showed the state at the time of bilevel mode about the vehicle air conditioner of 1st Embodiment of this invention. It is the schematic diagram which showed the state at the time of foot mode about the vehicle air conditioner of 1st Embodiment. It is the perspective view which showed the air mix door of the vehicle air conditioner of 1st Embodiment. It is the IV-IV arrow line view of FIG. It is the top view which showed the 1st other form of the air mix door shown in FIG. It is the experimental result which measured the temperature distribution of each blower outlet in the bi-level mode using the conventional air mix door which is not provided with the air guide part shown in FIG. It is the experimental result which measured the temperature distribution of each blower outlet in the bi-level mode using the air mix door of this application shown in FIG. It is the top view which showed the 2nd other form of the air mix door shown in FIG. It is a front view of the air mix door shown in FIG. It is the schematic diagram which showed the state at the time of foot mode about the vehicle air conditioner of 2nd Embodiment. It is the top view which showed the air mix door of the vehicle air conditioner of 2nd Embodiment. It is the top view which showed the 1st other form of the air mix door shown in FIG. It is the schematic diagram which showed the state at the time of bilevel mode about the vehicle air conditioner of 3rd Embodiment.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. Not only combinations of parts that clearly show that combinations are possible in each embodiment, but also a combination of the embodiments even if they are not clearly shown unless there is a problem with the combination. It is also possible.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram showing a state in the bi-level mode of the vehicle air conditioner 1 according to the first embodiment, and FIG. 2 is a schematic diagram showing a state in the foot mode.

  As shown in FIGS. 1 and 2, the vehicle air conditioner 1 includes an air conditioning case 2 and air blowing cases 2 and air blowing ducts that connect the air outlets that open to predetermined portions in the vehicle interior. The air conditioning case 2 is composed of, for example, a plurality of case members, and the material thereof is a resin molded product such as polypropylene.

  The air conditioning case 2 includes a cold air passage 5 through which cold air flows, a hot air passage 8 through which hot air flows, and a mixing unit 9 in which the cold air and the hot air are mixed. The air-conditioning case 2 includes an inside / outside air switching box (not shown) for taking outside air and inside air so as to be switched, a blower (not shown) for blowing air inside or outside the vehicle compartment to the evaporator 4 and the following, Air conditioning components arranged downstream of the blower are provided in this order from the upstream. The inside / outside air switching box and the blower are provided, for example, on the back side of the instrument panel installed in the front part of the vehicle interior and in the position closer to the passenger seat from the center of the vehicle, and the air conditioning parts are located on the back side of the instrument panel in the center of the vehicle. It is provided near the section.

  The blower includes a centrifugal multiblade fan and a motor that drives the fan, and the centrifugal multiblade fan is surrounded by a scroll casing. The blower outlet of the blower is connected to the blower passage 3 reaching the ventilation inlet of the evaporator 4 by a duct extending in the centrifugal direction of the centrifugal multiblade fan.

  The air-conditioning parts arranged downstream of the blower have passed through the evaporator 4 provided so as to block the entire blower passage 3 across, the heater core 7 that heats the air that has passed through the evaporator 4, and the evaporator 4. Of the air, an air mix door 6 that adjusts the amount of air passing through the heater core 7, a differential door 10, a face door 12 provided downstream of the mixing section 9 where the cool air passage 5 and the hot air passage 8 merge, A foot door 14. 1 and 2, the upper side of the figure is located on the upper side, the lower side of the figure is located on the lower side, the left side of the figure faces the front of the vehicle, and the right side of the figure faces the rear of the vehicle.

  The evaporator 4 evaporates the low-temperature and low-pressure refrigerant decompressed by an expansion valve in a refrigeration cycle (not shown) by receiving air from the blower and cools the blown air passing around the tube through which the refrigerant flows. Means. A cool air passage 5 and a heater core 7 are provided downstream of the evaporator 4, and an air mix door 6 for adjusting the air volume ratio between the air passing through the cool air passage 5 and the air toward the heater core 7 is provided.

  The heater core 7 is a heating unit that heats the air flowing around the air in the air-conditioning case 2 by using high-temperature cooling water of the traveling engine as a heat source, and is a passage downstream of the evaporator 4 in the air flow direction. It is arranged so as to partially block. On the downstream side of the heater core 7, a hot air passage 8 is provided upward from the vehicle rear side in the air conditioning case 2 and is connected to the mixing unit 9.

  The air mix door 6 is a one-side pivotal plate-like door provided downstream of the evaporator 4. The air mix door 6 adjusts the amount of air heated by the heater core 7 out of the amount of air cooled by the evaporator 4 by controlling the opening degree of the door body 60, and bypasses the air passing through the heater core 7 and the heater core 7. The temperature of the air is adjusted by mixing with the mixing air in the mixing unit 9.

  The mixing unit 9 is a space where the air flowing from the evaporator 4 and the air heated by the heater core 7 and flowing through the warm air passage 8 are mixed, and on the downstream side, the differential blowing passage 11, the face blowing passage 13, and the foot are mixed. It communicates with the blowing passage 15. The conditioned air whose temperature is adjusted in this space is adjusted to an appropriate air volume ratio by controlling the opening degree of each mode blowing door such as the differential door 10, the face door 12, and the foot door 14 to enter the vehicle interior. Supplied.

  The differential blow-out passage 11 is a passage including a differential blow-off opening formed in the air-conditioning case 2, and is connected to a differential blow-out opening that opens into the vehicle interior via a connected blow-out duct. This is a passage through which conditioned air blown out along the side of the vehicle interior such as window glass (difference blowing) flows. The differential door 10 includes a plate-shaped door body and a door shaft that rotates the door body in a forward / reverse direction to rotate the door body. The door shaft is driven by a servo motor or other actuator via a link mechanism. Is done. The differential blowing passage 11 is opened and closed by controlling the rotation of the door shaft of the differential door 10 according to the blowing mode.

  The face blowing passage 13 is a passage including a face blowing opening formed in the air-conditioning case 2 and is connected to a face blowing opening opened in the vehicle interior via a connected blowing duct. This face outlet opens at the center of the instrument panel or both sides of the passenger compartment to blow air-conditioned air toward the upper body of the occupant. The The face door 12 includes a plate-like door main body and a door shaft for rotating the door main body in a forward and reverse direction (rotating). The door shaft is a driven portion that is driven together with other doors via a link mechanism by an actuator such as a servo motor. The face blowing passage 13 is opened and closed by controlling the rotation of the door shaft of the face door 12 according to the blowing mode.

  The foot blowing passage 15 is a passage including a foot blowing opening formed in the air-conditioning case 2 and is connected to a foot blowing outlet that opens into the vehicle interior via a connected foot blowing duct. The foot outlet is an opening for blowing air-conditioned air to the feet of the front and rear passengers, and warm air is mainly blown out during heating. The foot door 14 is composed of a plate-like door body and a door shaft for rotating the door body in a forward / reverse direction to rotate the door body, and the door shaft is connected via an actuator such as a servo motor via a link mechanism. Driven with the door. The foot blowing passage 15 is opened and closed by controlling the rotation of the door shaft.

  The air conditioner control device (not shown) includes a signal related to the set temperature from the air conditioner operation unit, an inside air temperature sensor that detects the temperature inside the vehicle interior, an outside temperature sensor that detects the temperature of the outside air, and the amount of solar radiation into the vehicle interior. Signals from various sensors such as a solar radiation sensor for detecting the temperature, a temperature sensor for detecting the downstream temperature of the evaporator 4, and a water temperature sensor for detecting the cooling water temperature of the engine are input. The air conditioner control device executes a predetermined control program based on input signals from various sensors and the like, such as a compressor, a blower, an air mix door 6, a differential door 10, a face door 12, and a foot door 14. By controlling a servo motor or the like that drives the door, the conditioned air blown from each air outlet in the vehicle compartment is controlled.

  Next, the configuration of the air mix door 6 will be described in detail with reference to FIGS. FIG. 3 is a perspective view for explaining the configuration of the air mix door 6. 4 is a view taken in the direction of arrows IV-IV in FIG. FIG. 5 is a plan view showing an air mix door 6A which is a first other form of the air mix door 6 shown in FIG.

  As shown in FIG. 3, the air mix door 6 includes a door main body 60, a door shaft 67 as a rotation shaft provided at an end of the door main body 60, and a door main body 60 provided integrally on the surface of the door main body 60. And guide walls 61 and 62 as air guide portions for guiding the flow of air on the surface. The guide walls 61, 62 form a plurality of first passages 68 on the surface of the door body 60 in order for air to divide and flow on the surface of the door body 60. The first passage 68 is a passage formed between the plurality of guide walls 61 and 62. As shown in FIG. 3, in order to form a plurality of first passages 68 on the door body 60, at least two or more adjacent guide walls 61 and 62 are provided on the door body 60. is there.

  Each of the guide walls 61 and 62 is a plate-like wall that protrudes from the surface of the door main body 60 and extends from one air flow downstream side toward the other air flow upstream side. The guide wall 62 forms a first passage 68 that is open on the side away from the surface of the door body 60, and the passage cross-sectional area of one air flow downstream of the first passage 68 is the other air flow upstream. Are arranged at intervals so as to be smaller than the cross-sectional area of the passage. In the guide wall 61 and the guide wall 62, the distance between the other end 61a of the guide wall 61 and the other end 62a of the guide wall 62 is greater than the distance between the one end 61b of the guide wall 61 and the one end 62b of the guide wall 62. Largely, the door main body 60 has a square shape that spreads from the downstream side to the upstream side in a plan view of the door body 60. As described above, the interval between the plurality of guide walls 61 and 62 is such that one air flow downstream side is narrower than the other air flow upstream side, and further, the cross-sectional area of the first passage 68, that is, the passage cross-sectional area. Becomes smaller toward the downstream side of the air flow. That is, the 1st channel | path 68 comprises the aperture_diaphragm | restriction channel | path where a channel | path is gradually narrowed toward the one airflow downstream from the other.

  Further, as shown in FIGS. 3 and 5, a second passage 69 is formed between the guide wall 61 forming the first passage 68 and one set of the guide wall 62 and another set adjacent to each other. Is done. The second passage 69 is narrower in the direction opposite to the first passage 68, and the distance between the one end 61 b of the guide wall 61 and the one end 62 b of the guide wall 62 is the other end of the guide wall 61. It is larger than the distance between the portion 61a and the other end portion 62a of the guide wall 62, and has a C-shape that widens from the one side to the other side in a plan view of the door body 60. As described above, the distance between the guide walls 61 and 62 forming the second passage 69 is narrower on the other side than the one side, and the cross-sectional area of the second passage 69, that is, the passage cross-sectional area is the other. The smaller it goes to the side. That is, the second passage 69 constitutes a throttle passage that gradually narrows toward the other side.

  Further, the door main body 60 of the air mix door 6 has a plurality of protrusions protruding from the surface of the door main body 60 so as to intersect the guide walls 61 and 62 in a first passage 68 formed between the plurality of guide walls 61 and 62. Barrier portions 63, 64, and 65 are provided. The plurality of barrier portions are provided from one end portion to the other end portion (from the downstream side to the upstream side of the air flow) of the door body 60, and in order, a first barrier portion 63 that bridges between the guide walls 61 and 62, a second barrier portion. They are the barrier part 64 and the third barrier part 65. All the barrier portions have a protruding height from the surface of the door body 60 lower than the guide walls 61 and 62. The first barrier portion 63 has a protruding height from the surface of the door body 60 that is lower than that of the second barrier portion 64 and the third barrier portion 65. Further, the first barrier portion 63 and the third barrier portion 65 are extended so as to cross the second passage 69.

  As shown in FIG. 4, the air flowing into the first passage 68 is located on the side farther from the surface of the door body 60 between the guide walls 61 and 62 (upper side in FIG. 4). 61 flows smoothly from the other end 61a) to the outlet (one end 61b of the guide wall 61), and the wind speed increases. On the other hand, on the side close to the surface of the door body 60 between the guide walls 61 and 62 (the lower side in FIG. 4), it is separated from the surface of the door body 60 by colliding with each barrier section including the second barrier section 64. Therefore, this flow spreads around the door body 60 and further mixes with other air at the downstream mixing portion 9 to improve the air mixing performance.

  For example, when the guide walls 61 and 62 are about 20 mm, the height of the protrusion from the surface of the door body 60 is about 5 mm for the first barrier portion 63 and about 8 mm for the second barrier portion 64 and the third barrier portion 65. Is preferred. At this time, the distance between the one end 61b of the guide wall 61 and the one end 62b of the guide wall 62 is about 17 mm, and the distance between the other end 61a of the guide wall 61 and the other end 62a of the guide wall 62 is about 45 mm. .

  The door body 60, the guide walls 61 and 62, the first barrier portion 63, the second barrier portion 64, and the third barrier portion 65 are made of a hard resin whose main component is polypropylene resin, ABS resin, or the like. It can manufacture by integral molding using etc. In addition, packings 66 are attached to both surfaces of the door body 60 so as to cover portions other than the guide walls 61 and 62, the first barrier portion 63, the second barrier portion 64, and the third barrier portion 65. The resin forming the air mix door 6 may be configured by mixing talc material, mica, glass, or the like as a reinforcing material with plastic such as polypropylene resin.

  In addition, as shown in FIG. 5, an air mix door 6 </ b> A that exhibits the same effects as the air mix door 6 may be used. The air mix door 6 </ b> A has a configuration in which no barrier portion is provided in the second passage 69 with respect to the air mix door 6. Thereby, the air (for example, warm air shown in FIG. 5) flowing through the second passage 69 from one side of the door body 60 toward the other flows smoothly, and a large wind speed increasing effect can be obtained.

  FIG. 7 shows the experimental results of measuring the temperature distribution of each outlet in the vehicle compartment in the bi-level mode using the air mix door 6 of the present application shown in FIG. On the other hand, FIG. 6 shows the experimental results of measuring the temperature distribution of each outlet in the passenger compartment in the bi-level mode when using a conventional air mix door without an air guide as shown in FIG. It is.

  In FIG.6 and FIG.7, the vertical axis | shaft is made into temperature and the horizontal axis is made into the opening degree (%) of an air mix door. That is, the amount of warm air increases as the opening degree increases, that is, as the value on the horizontal axis increases. The experimental data indicated by FACE-DrS and FACE-DrC and given predetermined marks are the air temperature at the driver's side face outlet and the air temperature at the driver's center face outlet. The experimental results respectively indicated by FACE-PaS and FACE-PaC and given a predetermined mark are the air temperature at the side face air outlet on the passenger seat side and the air temperature at the center face air outlet on the passenger seat side. The experiment results indicated by FOOT-DrL and FOOT-DrR and given predetermined marks are the air temperature of the driver's left foot outlet and the air temperature of the driver's right foot outlet. The experimental results indicated by FOOT-PaL and FOOT-PaR and given predetermined marks are the air temperature at the left foot outlet on the passenger seat side and the air temperature at the right foot outlet on the passenger seat side.

  As shown in FIG. 6, in the bi-level mode using the conventional air mix door, the temperature difference between the air blown from the face blower outlet connected by the solid line and the air blown from the foot blower outlet connected by the broken line is When the opening of the air mix door is 50%, it becomes about 7 ° C. On the other hand, in the bi-level mode using the air mix door 6 of the present application, as shown in FIG. 7, the temperature difference between the air at the face outlet and the air at the foot outlet is the opening degree of the air mix door. It was found that when the ratio was 50%, it increased to about 17 ° C. Similarly, even when the opening is other than 50%, the temperature difference is larger when the air mix door 6 of the present application is used. As described above, the effect of increasing the temperature difference between the plurality of outlets due to the increase in the wind speed provided by the air mix door 6 of the present application is remarkable. Therefore, an appropriate upper limit temperature difference between the air outlets, that is, a so-called head cold foot heat effect can be expected.

  The operation | movement at the time of each operation mode of the vehicle air conditioner 1 which concerns on the said structure is demonstrated. As shown in FIG. 1, in the bi-level mode in which foot blowing and face blowing are performed to the vehicle interior, the air conditioner control device controls the opening degree of the differential door 10 so as to close the differential blowing passage 11, The opening degree of the face door 12 and the foot door 14 is controlled so that the passage 13 and the foot blowing passage 15 are set to predetermined opening degrees according to the air volume. Further, the air conditioner control device opens the door body 60 of the air mix door 6 according to a result obtained by executing a predetermined control program based on signals from the air conditioner operation unit and input signals from various sensors. Control the air volume of the blower, the refrigerant discharge capacity of the compressor, and the like. In the bi-level mode, for example, the ratio of the air volume of the face balloon and the foot balloon is controlled to be approximately 60:40.

  In this bi-level mode, as indicated by the arrows in FIG. 1, a part of the cold air that has passed through the evaporator 4 flows toward the heater core 7 through the lower side of the door body 60 of the air mix door 6 and is heated by the heater core 7. After that, it passes through the warm air passage 8 and reaches the mixing section 9. At the same time, the remainder of the cold air that has passed through the evaporator 4 flows along the surface of the door main body 60 and the flow that reaches the mixing section 9 through the cold air passage 5 positioned above the door main body 60 of the air mix door 6. Thus, a flow that reaches the mixing section 9 is generated. The cold air of any flow mixes with the hot air flowing through the hot air passage in the mixing unit 9, is adjusted to an appropriate temperature, and flows into the face blow-out passage 13 and the foot blow-out passage 15.

  Among these, the flow along the surface of the door body 60 is divided into a plurality of layered flows by passing through the plurality of first passages 68 formed by the plurality of guide walls 61 and 62, so that the air with the warm air The mixability is improved and the outlet wind speed of the first passage 68 is higher than the inlet wind speed, so that the amount of air passing through the mixing section 9 and reaching the blowing passages 13 and 15 is increased. In particular, since cold air with increased wind speed can easily reach the face blowing passage 13, more cool air having high cooling performance can be blown out from the face blowing port in the vehicle compartment as compared with a conventional air mix door.

  As shown in FIG. 2, in the foot mode in which differential blowout, foot blowout, and face blowout are performed in the vehicle interior, the air conditioner control device uses the differential blowout passage 11, the face blowout passage 13, and the foot blowout passage 15 as air volumes. The opening degree of the differential door 10, the face door 12, and the foot door 14 is controlled so as to set the corresponding predetermined opening degree. Further, the air conditioner control device opens the door body 60 of the air mix door 6 according to a result obtained by executing a predetermined control program based on signals from the air conditioner operation unit and input signals from various sensors. Control the air volume of the blower, the refrigerant discharge capacity of the compressor, and the like. In this foot mode, for example, the ratio of each air volume of the differential balloon, the face balloon, and the foot balloon is controlled to be about 15:15:70.

  In this foot mode, as shown by the arrows in FIG. 2, the door main body 60 of the air mix door 6 is narrower than the position in the bi-level mode by narrowing the cold air passage 5 at the portion directly connected to the mixing unit 9 and the heater core 7. The opening is set at a position where the cold air passage 5 of the part directly connected is enlarged. With this opening degree setting, a part of the cold air that has passed through the evaporator 4 flows under the door body 60 of the air mix door 6 toward the heater core 7 and is heated by the heater core 7, and then passes through the hot air passage 8. It passes through and reaches the mixing section 9, flows toward the air mix door 6, and flows into the foot blowing passage 15. At the same time, the remainder of the cold air that has passed through the evaporator 4 travels above the door body 60, is divided by the plurality of first passages 68 along the surface of the door body 60, reaches the mixing unit 9, and It is adjusted and mainly flows into the face blowing passage 13. At this time, a flow is formed on the surface of the door body 60 in which the hot air flowing from the hot air passage 8 passes through the second passage 69 in the direction opposite to the remaining flow of the cold air. The temperature reaches the portion 9 and is adjusted to mainly flow into the differential blowing passage 11.

  Thus, the cool air along the surface of the door body 60 is divided into a plurality of layered flows by passing through the plurality of first passages 68 formed by the plurality of guide walls 61 and 62, so The air mixing property is improved and the outlet wind speed of the first passage 68 is higher than the inlet wind speed, so that the amount of air passing through the mixing section 9 and reaching the blowing passages 13 and 15 is increased. In particular, since cold air with increased wind speed can easily reach the face blowing passage 13, more cool air having high cooling performance can be blown out from the face blowing port in the vehicle compartment as compared with a conventional air mix door. Further, since the warm air along the surface of the door body 60 passes through the second passage 69 formed by the plurality of guide walls 61 and 62, the outlet wind speed of the second passage 69 is higher than the inlet wind speed. The amount of air reaching the differential blowout passage 11 increases. For this reason, since the warm air with increased wind speed can easily reach the differential blow-out passage 11, more warm air with high temperature sensitivity can be blown out from the differential blow-out port in the vehicle compartment as compared with the conventional air mix door. In addition, an improvement in the window fogging suppression effect can be expected.

  Next, the air mix door 6B which is the second other form of the air mix door 6 will be described. As shown in FIGS. 8 and 9, unlike the air mix door 6, the air mix door 6 </ b> B includes a guide wall 61 </ b> A having a semicircular cross-sectional shape protruding from the surface of the door body 60. The passage 68A is a tunnel-like passage. In the first passage 68A, the passage cross-sectional area on the downstream side of one air flow is smaller than the cross-sectional area on the upstream side of the other air flow. The guide wall 61A has a semicircular opening surrounded by the other end 61a of the guide wall 61A and the door main body 60, rather than a semicircular opening surrounded by the one end 61b of the guide wall 61A and the door main body 60. Largely, the door main body 60 has a trapezoidal shape that spreads from the downstream side to the upstream side in a plan view. Thus, in the first passage 68A, the downstream side of one air flow is narrower than the upstream side of the other air flow, and the cross-sectional area, that is, the cross-sectional area of the passage becomes smaller toward the downstream side of the air flow. . That is, the 1st channel | path 68 comprises the tunnel-shaped throttle channel | path where a channel | path is gradually narrowed toward the one airflow downstream from the other.

  The effect which the vehicle air conditioner 1 which concerns on this Embodiment brings is described. The vehicle air conditioner 1 is provided in the air conditioning case 2 and the air conditioning case 2 that forms therein a cold air passage 5 through which cold air flows, a hot air passage 8 through which hot air flows, and a mixing unit 9 in which cold air and hot air are mixed. An evaporator 4 that cools air and supplies cold air to the downstream side, a heater core 7 that is provided in the air conditioning case 2 and heats the air and supplies hot air to the downstream side, and cold air and hot air that are mixed by the mixing unit 9 An air mix door 6 that adjusts the air flow ratio of the door body 60 by the opening degree of the door body 60 and the mixing unit 9 are formed in the air conditioning case 2 to blow out air-conditioned air to each of a plurality of predetermined parts in the vehicle interior. A plurality of blowing passages (for example, a differential blowing passage 11, a face blowing passage 13, and a foot blowing passage 15). The air mix door 6 has guide walls 61 and 62 that form a plurality of passages on the surface of the door body 60 so that the air flows in a divided manner on the surface of the door body 60. The passage formed by the guide walls 61 and 62 has a passage cross-sectional area on the downstream side of one air flow smaller than a passage cross-sectional area on the upstream side of the other air flow.

  According to this configuration, when the air flowing along the surface of the door main body 60 of the air mix door 6 passes through the plurality of first passages 68 formed by the plurality of guide walls 61 and 62, the downstream side When the passage is throttled, the outlet wind speed of the passage increases more than the inlet wind speed. Thereby, since the air speed of the air-mixed air is increased by the first passage 68, the amount of air reaching the predetermined blowing passage among the plurality of blowing passages is increased. For example, in the mode in which the conditioned air is blown out from the face blowing passage 13 and the foot blowing passage 15 such as the bi-level mode, the speed of the cold air or the hot air is increased by the plurality of guide walls 61 and 62 on the downstream side. The amount of air reaching the blowing passage 13 or the amount of air reaching the foot blowing passage 15 increases. For this reason, air with a higher feeling of cooling or warm air is supplied to the predetermined blowout passage, and air conditioning that ensures a temperature difference between the face outlet and the foot outlet in the passenger compartment is provided to the occupant. Can do.

  Further, in this configuration, when the distance from the air mix door to each blowing passage is long, it is possible to secure a lot of cold air or hot air reaching the predetermined blowing passage as compared with the conventional air mix door. A significant temperature difference can be created between the passages. In addition, since the air speed can be increased when the air passes over the door body 60 of the air mix door 6, the position of the door body 60 in the air conditioning case 2 is less than that of the conventional air mix door. Without being affected, it is possible to secure the air volume that reaches each of the blowing passages 11, 13, and 15. Therefore, it is possible to provide a device having a high degree of freedom in the place where the air mix door is disposed.

  Further, in the vehicle air conditioner 1, since the effect of increasing the wind speed can be obtained by forming a plurality of throttle passages on the door body 60, the temperature between each outlet in the vehicle interior can be increased without increasing the number of guide walls. A difference can be secured. Therefore, when the number of guide walls is increased, the weight of the door body becomes heavy, and the problem that the shut property of the door is lowered can be avoided.

  Further, in the vehicle air conditioner 1, the guide walls 61 and 62 are shaped like a letter C in a plan view of the door main body 60, so that air along the surface of the door main body 60 passes through the door main body 60 at the outlet. It flows so as not to be close to both ends of 60 but to be concentrated on the side closer to the center. For this reason, the air flowing near the inner wall surface of the air conditioning case 2 is reduced. Therefore, when the air speed of the cold air increases by the air mix door 6, the flow of the hot air flowing near the inner wall surface of the air conditioning case 2 toward the differential blowing passage 11 and the foot blowing passage 15 is obstructed by the cold air. That can be suppressed. By such an action, it becomes easier to secure a temperature difference between the face blowing passage 13 and the differential blowing passage 11 or the foot blowing passage 15.

  Further, since the guide walls 61 and 62 are formed in a C shape in a plan view of the door body 60, when the wind speed of the cold air is increased by the air mix door 6, the cold air is generated at the door of the door body 60 at the outlet. It flows so as not to be near both ends of the main body 60 but to a side closer to the central portion. For this reason, the cold air is rectified toward the center in the width direction of the air-conditioning case 2 by the air mix door 6 and the temperature variation in the face blowing passage 13 is suppressed, so the air blown out from the face outlet in the passenger compartment Temperature variation can be reduced.

  The air mix doors 6 and 6 </ b> A are arranged such that the air flowing through the cold air passage 5 is divided into a plurality of first passages 68 and flows. According to this configuration, the plurality of first passages 68 cause the cold air to increase in the wind speed at the downstream side of the passage compared to the upstream side, and the cold air is heated by the air mixing doors 6 and 6A in the mixing unit 9. The temperature is adjusted appropriately by mixing with. Further, since the wind speed of the cold air increases, the cold air of low temperature can easily reach the face blowing passage 13. Therefore, as in the bi-level mode, the cool air reaching the face blowing passage 13 increases to give coolness to the vicinity of the upper body of the occupant, and the foot blowing passage 15 formed in the air conditioning case 2 to blow out warm air The warm air and the cold air appropriately mixed in the mixing section flow in and give warmth to the vicinity of the occupant's feet, so that the occupant can enjoy the so-called cold-foot-heated air conditioning in which a sufficient vertical temperature difference is ensured.

  The plurality of guide walls 61 and 62 protrude from the surface of the door body 60, extend from one air flow downstream side toward the other air flow upstream side, and are opened on the side away from the surface of the door body 60. A plurality of plate-shaped guide portions arranged at intervals so as to form the first passage 68. The interval between the plurality of guide walls 61 and 62 is such that one air flow downstream side is narrower than the other upstream side. According to this configuration, since the first passage 68 is formed by the plurality of guide walls 61 and 62, the above-described unique passage can be created with a relatively simple configuration, and the productivity of the air mix door and Low cost can be improved.

  Further, the passage formed between the plurality of guide walls 61 and 62 is further provided with a barrier portion that intersects the guide walls 61 and 62. The height of the barrier portion projecting from the surface of the door body 60 is lower than that of the guide walls 61 and 62. According to this configuration, one of the cold air and the hot air flowing through the plurality of first passages 68 is increased in wind speed by the restriction of the passage cross-sectional area, and a part of the air collides with the barrier portion to cause the door body. Create a flow away from the 60 surface. For this reason, the mixing with the other air proceeds by this flow, and the air mix effect can be further improved.

  The barrier portion includes a first barrier portion 63 located on the downstream side of the air flow and a second barrier portion 64 located on the upstream side of the first barrier portion 63. The first barrier 63 has a lower protrusion height from the surface of the door body 60 than the second barrier 64.

  According to this configuration, since the protruding height of the first barrier portion 63 located downstream of the air flow is lower, while ensuring the effect of increasing the wind speed by reducing the passage cross-sectional area on the downstream side, Mixing promotion with the other air is obtained at the second barrier portion 64 located on the upstream side.

(Second Embodiment)
A vehicle air conditioner 1 </ b> A described in the second embodiment includes a plurality of air mix doors 6 </ b> C each including a door shaft 67 as a rotation shaft at the center of the door body 60 instead of the air mix door 6 of the first embodiment. It is provided. FIG. 10 is a schematic diagram showing a state in the foot mode of the vehicle air conditioner 1A of the second embodiment. FIG. 11 is a plan view showing an air mix door 6C of the vehicle air conditioner 1A. FIG. 12 is a plan view showing an air mix door 6D which is a first other form of the air mix door shown in FIG.

  Two vehicle air conditioners 1A are used to adjust the amount of cool air flowing from the cool air passage 5 toward the mixing unit 9, and two units are used to adjust the amount of hot air passing through the heater core 7 and then toward the mixing unit 9. And an air mix door 6C. As shown in FIG. 11, the air mix door 6 </ b> C is the same as the air mix door 6 except that the door shaft 67 is provided in the central portion of the door body 60, and each part has the same effects. The air mix door 6D shown in FIG. 12 is provided only on one side of the door main body 60 in which the guide walls 61 and 62 are divided into two by the door shaft 67 with respect to the air mix door 6C of FIG. The first passage 68B is about half as long as the first passage 68A of the air mix door 6C.

  With such a configuration in which a plurality of such air mix doors 6C and 6D are provided in the cold air passage 5 and the hot air passage 8, the air flowing along the surface of the door body 60 of each air mix door 6C or 6D is When passing through the plurality of first passages 68A and 68B formed by the plurality of guide walls 61 and 62, the passage is throttled on the downstream side so that the outlet wind speed of the passage increases more than the inlet wind speed. become. As a result, the air speed of the air-mixed air increases in each of the first passages 68A and 68B, so that the amount of air reaching the predetermined blowing passage among the plurality of blowing passages increases. For example, in the bi-level mode or the foot mode, the amount of cold air reaching the face blow-out passage 13 is increased by the cold air whose wind speed has increased on the downstream side by the plurality of air mix doors 6C and 6D arranged in the cold air passage 5. At the same time, the amount of hot air reaching the foot blow-out passage 15 is increased by the warm air whose wind speed has increased on the downstream side by the plurality of air mix doors 6C, 6D arranged in the warm air passage 8. Due to the effect of increasing the wind speed of both cold and warm air, air conditioned air with higher cooling feeling is blown out to the passenger's face air outlet, and air conditioned air with higher warm feeling is blown out to the foot air outlet. Since it is provided, the temperature difference between the two outlets can be further ensured.

  The air mix door 6 </ b> C or 6 </ b> D having the door shaft 67 at the center of the door body 60 is preferably provided with a plurality of guide walls 61 and 62 on both surfaces of the door body 60. When this configuration is adopted, an effect of increasing the wind speed can be obtained on both surfaces of the plurality of air mix doors 6C and 6D, so that a temperature difference between the plurality of air outlets can be further ensured.

(Third embodiment)
The vehicle air conditioner 1B described in the third embodiment is provided on the downstream side of the cold air passage 5 and the hot air passage 8 in addition to the air mix door 6 of the first embodiment, and the air that has flowed through the cold air passage 5 And a wind direction adjusting door 600 that adjusts the wind direction of the air flowing through the warm air passage 8. FIG. 13 is a schematic diagram showing a state in the bi-level mode of the vehicle air conditioner 1B of the third embodiment.

  The configuration for forming the first passage 68 on the wind direction adjusting door 600 is the same as that of the air mix door 6 described in the first embodiment. The airflow direction adjusting door 600 has a plurality of guide walls 61 and 62 that form a plurality of first passages 68 on the surface of the door body 60 so that the air flowing from the upstream side is divided and flows in the door body 60. On both sides of the door body 60. That is, the plurality of first passages 68 formed by the guide walls 61 and 62 have a passage cross-sectional area on the downstream side of the air flow smaller than a cross-sectional area on the upstream side of the air flow.

  In such a vehicle air conditioner 1 </ b> B, at least one of the cold air and the warm air flowing along both surfaces of the door body 60 of the air direction adjusting door 600 is a plurality of first walls formed by the plurality of guide walls 61 and 62. When passing through one passage 68, the passage is throttled on the downstream side, so that the outlet wind speed of the passage increases more than the inlet wind speed. As a result, the air speed of the air-mixed air increases in each first passage 68, so that the amount of air reaching the predetermined blowing passage among the plurality of blowing passages increases. For example, in the bi-level mode, as shown in FIG. 13, the cold air that has passed through the cold air passage 5 increases in wind speed on the surface of the door body 60 on the cold air passage 5 side in the wind direction adjusting door 600, thereby The amount of cold air reaching 13 increases. Further, the warm air flowing through the warm air passage 8 after passing through the heater core 7 reaches the foot blowing passage 15 as the wind speed increases on the surface of the door body 60 on the warm air passage 8 side in the air direction adjusting door 600. The amount of warm air increases. Due to the effect of increasing the wind speed of both cold and warm air, air conditioned air with higher cooling feeling is blown out to the passenger's face air outlet, and air conditioned air with higher warm feeling is blown out to the foot air outlet. Since it is provided, the temperature difference between both outlets can be further ensured.

  Further, with respect to the cold air flowing through the cold air passage 5, the effect of increasing the wind speed is obtained by the air mix door 6 on the upstream side of the wind direction adjusting door 600. A highly conditioned air can be provided.

(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.

  For example, the first passage 68 formed by the air guide portion has a function of increasing the wind speed of the cold air flowing through the cold air passage 5 in each of the above embodiments, but the position of the air mix door 6 and the inside of the air conditioning case 2 Depending on the position of the passage, it may have a function of increasing the speed of the warm air flowing through the warm air passage 8.

  Moreover, although the air mix door demonstrated by the said 1st and 2nd embodiment equips only the single side | surface of the door main body with the air guide part which show | plays the wind speed increase effect, an air guide part is provided in both surfaces of a door main body. You may do it. When this configuration is adopted, the effect of increasing the wind speed can be improved.

  In the above embodiment, as shown in FIGS. 3 and 5, only one second passage 69 is provided on the door body 60 in a form provided between the first passages 68. Without being limited thereto, by providing a plurality of second passages 69 on the door body 60, the effect of increasing the wind speed can be further enhanced. In this case, two or more sets of first passages 68 and second passages 69 are arranged on the door body 60 so that the first passages 68 and the second passages 69 are alternately arranged on the door body 60. What is necessary is just to arrange | position.

  Further, in each of the above embodiments, the air mix door having the air guide portion has a structure in which the mixing ratio of the cold air and the hot air is adjusted by rotating around the rotation shaft, but is described in each of the above embodiments. If it is provided with such a specific air guide part, it is not limited to the plate door of such a structure. For example, each of the above doors is a rotary door formed by a film door, a slide door having no rotation shaft, a radial side plate extending in the radial direction from the rotation shaft, and a circumferential side plate extending in the circumferential direction. In the embodiment, by providing the air guide portion, the same operational effects are achieved.

  Moreover, the structure of the air guide part provided in an air mix door etc. is not limited to the shape of FIGS. 3-5, FIG.8, FIG.9, FIG.11 and FIG.12 demonstrated in the said embodiment. It is only necessary that the downstream side of the air flow in the passage formed on the door body is narrower than the upstream side. For example, the outlet part on the most downstream side is narrower than the inlet part on the most upstream side, and the middle is narrowed stepwise. The narrowest part of the passage is located slightly upstream from the outlet part on the most downstream side, and a passage gradually narrowing from the inlet part on the most upstream side toward the narrowest part is formed. It may be a passage that extends a little from the outlet portion to the most downstream side.

2 ... Air conditioning case 4 ... Evaporator (cooling means)
5 ... Cool air passage 6,6A, 6B ... Air mix door 7 ... Heater core (heating means)
8 ... Warm air passage 11 ... Differential blowout passage 13 ... Face blowout passage 15 ... Foot blowout passage 60 ... Door body 61, 62 ... Guide wall (air guide portion)
63 ... First barrier portion 64 ... Second barrier portion 68 ... First passage (passage)
69 ... second passage 600 ... wind direction adjusting door

Claims (5)

A cold air passage (5) through which cold air flows, a hot air passage (8) through which hot air flows, and an air conditioning case (2) that forms therein a mixing section (9) in which the cold air and hot air are mixed, and the air conditioning case A cooling means (4) for cooling the air and supplying cold air to the downstream side, a heating means (7) for heating the air and supplying hot air to the downstream side provided in the air conditioning case, An air mix door (6) that adjusts the air volume ratio of the cold air and the hot air to be mixed in the mixing unit according to the opening of the door body (60), and air-conditioning each of a plurality of predetermined parts connected to the mixing unit in the vehicle interior. A plurality of blowout passages (11, 13, 15) formed in the air conditioning case for blowing out the air,
The air mix door has an air guide portion (61, 62) that forms a plurality of passages (68 , 69 ) on the door body surface so that air flows in a plurality of parts on the door body surface,
The air guide portion protrudes from the door body surface, extends from the air flow upstream side toward the air flow downstream side, and forms the plurality of passages opened on the side away from the door body surface. It includes a plurality of plate-like guide walls (61, 62) arranged at intervals,
The spacing between the plurality of guide walls is such that the downstream side of the air flow is narrower than the upstream side of the air flow, so that the plurality of passages formed by the air guide portion have a passage cross-sectional area on the downstream side of the air flow. It is smaller than the passage cross-sectional area on the upstream side of the air flow ,
The plurality of passages formed by the air guide portion include a first passage (68) in which the cold air that has flowed through the cold air passage is divided into a plurality and flows from a larger crossing area of the passage to a smaller one. A vehicle comprising: a second passage (69) in which the hot air flowing from the hot air passage flows in the opposite direction to the cold air from the larger passage cross-sectional area to the smaller passage. Air conditioner. A cold air passage (5) through which cold air flows, a hot air passage (8) through which hot air flows, and an air conditioning case (2) that forms therein a mixing section (9) in which the cold air and hot air are mixed, and the air conditioning case A cooling means (4) for cooling the air and supplying cold air to the downstream side, a heating means (7) for heating the air and supplying hot air to the downstream side provided in the air conditioning case, An air mix door (6) that adjusts the air volume ratio of the cold air and the hot air to be mixed in the mixing unit according to the opening of the door body (60), and air-conditioning each of a plurality of predetermined parts connected to the mixing unit in the vehicle interior. A plurality of blowout passages (11, 13, 15) formed in the air conditioning case for blowing out the air,
The air mix door has air guide portions (61, 62) that form a plurality of passages (68) on the door body surface so that air is divided into a plurality of flows on the door body surface,
The passage (68) formed by the air guide portion has a passage cross-sectional area on the downstream side of one air flow smaller than a passage cross-sectional area on the upstream side of the other air flow ,
Further, the passage formed between the plurality of guide walls includes a barrier portion (64) intersecting with the guide wall, and the barrier portion has a protrusion height from the surface of the door body lower than the guide wall. A vehicle air conditioner characterized by the above. The barrier portion includes a first barrier portion (63) located on the downstream side of the air flow, and a second barrier portion (64) located on the upstream side of the first barrier portion,
The vehicle air conditioner according to claim 2 , wherein the first barrier portion (63) has a lower protrusion height from the surface of the door body than the second barrier portion (64). 4. The vehicle air conditioner according to claim 2 , wherein the air that has flowed through the cold air passage is divided into a plurality of passages that are formed by the air guide portion. 5. Furthermore, a wind direction adjusting door (600) is provided on the downstream side of the cold air passage and the hot air passage, and adjusts the air direction of the air flowing through the cold air passage and the air direction of the air flowing through the hot air passage. Prepared,
The wind direction adjusting door includes air guide portions (61, 62) that form a plurality of passages on the door body surface so that the air flowing from the upstream side is divided into a plurality of flows in the door body (60). Has on both sides of the door body,
The passage formed by the air guide portion of the wind direction adjusting door has a passage cross-sectional area on the downstream side of the air flow smaller than a cross-sectional area on the upstream side of the air flow. air-conditioning system according to any one of claims 4.

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