JP2020100250A - Vehicle air conditioner - Google Patents

Abstract

To provide a vehicle air conditioner which enables improvement of the ability to guide hot air to a defroster air outlet or a face air outlet.SOLUTION: A vehicle air conditioner includes a rotary door 4 which controls a ventilation amount to a defroster passage or a side face passage 30d according to a rotation position. The rotary door 4 has: a pair of side wall parts 43, 44 which face while spaced apart from each other in an axial direction of a rotary shaft part 40 and in which hot air and cool air flow intersecting with each other; and a first outer peripheral wall part 41 and a second outer peripheral wall part 42 which connect the pair of side wall parts. The vehicle air conditioner includes a first guide wall part 380 and a second guide wall part 381 defining a hot air guide passage 38 which guides hot air to the defroster passage 30b or the side face passage 30d. The first guide wall part 380 and the second guide wall part 381 are provided spaced apart from each other between a wall part 30f, which is spaced apart to the outer side in the axial direction of the rotary shaft part 40 from the side wall parts 43, 44, and the side wall parts 43, 44.SELECTED DRAWING: Figure 3

Description

The disclosure in this specification relates to a vehicle air conditioner.

Patent Document 1 discloses a vehicle air conditioner that guides warm air in an air mix space to a defroster port through a bypass passage in a foot mode.

JP, 2005-271772, A

Improvements are required in vehicle air conditioners in order to increase the amount of warm air supplied to the defroster outlet and the face outlet.

An object of the disclosure in this specification is to provide a vehicle air conditioner capable of enhancing the guideability of hot air to the defroster outlet or the face outlet.

The aspects disclosed in this specification employ different technical means to achieve their respective purposes. Further, the claims and the reference numerals in parentheses in this section are examples showing the correspondence with specific means described in the embodiments described later as one aspect, and limit the technical scope. is not.

One of the disclosed vehicle air conditioners includes an air conditioning case (30) having an air passage inside which air conditioning air flows,
A defroster passage (30b) provided in the air conditioning case so that the conditioned air is blown toward the defroster outlet in the vehicle interior;
A face passage (30d) provided in the air conditioning case so that the conditioned air is blown toward the face outlet in the vehicle interior;
A rotary door provided inside an air-conditioning case, comprising a rotating shaft portion (40) and a pair of side wall portions that face each other while being separated from each other in the axial direction of the rotating shaft portion and in which hot air and cold air flow in an intersecting manner. (43, 44) and an outer peripheral wall portion (41, 42) which is spaced radially outward from the rotation shaft portion and connects a pair of side wall portions to rotate integrally with the pair of side wall portions and the rotation shaft portion. And a rotary door (4; 104) for controlling the amount of ventilation to the defroster passage or the face passage according to the rotational position,
A wall (30f) of the air-conditioning case, which is spaced apart from the side wall in the axial direction of the rotary shaft, is provided with a space between the side wall and the side wall to guide warm air to the defroster passage or the face passage. And a set of guide wall portions (380, 381; 380, 1381; 460, 461) that partition and form the warm air guide passage (38; 46).

According to this vehicle air conditioner, hot air and cold air flow so as to intersect inside the rotary door, that is, inside the pair of side wall portions, and the mixed air of hot air and cold air flows in the defroster passage or the face passage. Flow into. In addition, since the hot air guide passage defined by a set of guide wall portions is provided outside the side wall portion in the axial direction of the rotating shaft portion, warm air is preferentially applied to the area outside the side wall portion. The amount of warm air supplied to the defroster passage or the face passage can be increased by circulating the air. Therefore, according to this disclosure, it is possible to provide a vehicle air conditioner capable of improving the guideability of hot air to the defroster outlet or the face outlet.

FIG. 3 is a partial cross-sectional view showing the air flow in the face mode of the vehicle air conditioner of the first embodiment. FIG. 3 is a partial cross-sectional view showing an air flow in a foot mode of the vehicle air conditioner of the first embodiment. It is the figure which showed the flow of the cold air and warm air in face mode, and the relationship between a hot air guide wall and an outlet switching door. It is the perspective view which showed the blowout switching door. It is the graph which showed the experimental result which measured the foot blowout temperature and the defroster blowout temperature about the vehicle air conditioner as a comparative example which does not have a warm air guide wall. It is the graph which showed the experimental result which measured the foot blowout temperature and the defroster blowout temperature about the air conditioning system for vehicles concerning a 1st embodiment. FIG. 9 is a partial cross-sectional view showing an air flow in a foot mode of the vehicle air conditioner of the second embodiment. FIG. 9 is a partial cross-sectional view showing an air flow in a foot mode of the vehicle air conditioner of the third embodiment.

Hereinafter, a plurality of modes for carrying out the present disclosure will be described with reference to the drawings. In each form, parts corresponding to the items described in the preceding form may be designated by the same reference numerals, and redundant description may be omitted. In the case where only a part of the configuration is described in each mode, the other mode described above can be applied to the other part of the configuration. Not only the combination of the parts clearly showing that the respective embodiments can be specifically combined, but also the combination of the embodiments is partially combined even if the combination is not particularly specified, unless there is a problem in the combination. It is also possible.

(First embodiment)
The first embodiment will be described with reference to FIGS. 1 and 2 are schematic diagrams showing the internal structure of a vehicle air conditioner 1 according to the first embodiment. FIG. 1 shows a state in which the blowing mode into the passenger compartment is the face mode. FIG. 2 shows a state in which the blowing mode into the passenger compartment is the foot mode.

The vehicle air conditioner 1 includes an air blowing unit 2 and an air conditioning unit 3 that adjusts the temperature of the air blown from the air blowing unit 2. Each of the air conditioning unit 3 and the blower unit 2 is made of a resin molded product case such as polypropylene. The case is formed by combining a plurality of divided case members, and the plurality of divided case members are made of elastic clips, screws, or the like. Be combined. The case may be formed of PP resin containing talc or glass fiber. For example, the blower unit 2 is arranged offset from the central portion to the passenger seat side in the space behind the instrument panel in the vehicle compartment. The air conditioning unit 3 is arranged at a substantially central portion of the vehicle width in the space behind the instrument panel.

The blower unit 2 includes an inside/outside air switching device that takes in at least one of the vehicle interior air and the vehicle outside air, and a blower device 20 that sucks the inside air and the outside air. The inside/outside air switching device includes an inside/outside air switching door, and switches the open/closed state of the air intake depending on the position of the inside/outside air switching door, and the suction force of the blower 20 causes the outside air/inside air to flow from the opened air intake. Or incorporate both of these. The blower device 20 has a fan that is a centrifugal multi-blade fan. The fan is arranged in the spiral scroll casing and is rotated by the driving force of the motor. The air sucked from the inside/outside air switching device to the blower device 20 by the rotation of the fan reaches the heat exchange section of the evaporator 31 through the air passage 21 in the duct connecting the blower unit 2 and the air conditioning unit 3.

The air conditioning unit 3 includes an evaporator 31, a heater core 32, a first air mix door 33, a second air mix door 34, a third air mix door 35, a rotary door 4, a foot door 36, a defroster door 37, etc. in the air conditioning case 30. Built-in. The evaporator 31 is installed so as to cross the air passage in the air conditioning case 30 in the vehicle height direction and the vehicle width direction, with the vehicle front-rear direction as the ventilation direction. The blown air from the blower unit 2 flows into the heat exchange section of the evaporator 31. The evaporator 31 is a cooling heat exchanger that absorbs the latent heat of vaporization of the refrigerant of the refrigeration cycle from the passing air and cools the air flowing through the air passage 21.

A heater core 32 is installed at a predetermined distance on the vehicle rear side, which is downstream of the evaporator 31. The heater core 32 has a structure in which hot water such as engine cooling water flows, and is a heat exchanger for heating that uses the hot water as a heat source to heat the air that has passed through the evaporator 31. The heater core 32 is installed such that its heat exchange portion occupies a predetermined space on the vehicle front side downstream of the evaporator 31 and partially traverses a passage on the downstream side of the evaporator 31.

In the passages downstream of the evaporator 31, first cold air passages 301 and second cold air passages 304 in which air that does not pass through the heater core 32 respectively flows, and first warm air passages 302 and 302 in which air that passes through the heater core 32 flows respectively. Two hot air passages 303 are provided. The passage downstream of the evaporator 31 is divided into a first cold air passage 301, a first warm air passage 302, a second warm air passage 303, and a second cold air passage 304 in order from the upper part to the lower part. The first cold air passage 301, the first warm air passage 302, the second warm air passage 303, and the second cold air passage 304 are provided in the air conditioning case 30 over the entire vehicle width direction.

The first cool air passage 301 is the uppermost portion of the passage downstream of the evaporator 31 and extends rearward of the vehicle above the heater core 32. The heat exchanging portion of the heater core 32 and the upstream passage and the downstream passage of the heat exchanging portion are divided into an upper first warm air passage 302 and a lower second warm air passage 303 by the passage partitioning portion 30a. The first warm air passage 302 is a passage that is located above and extends rearward of the vehicle among the two passages that pass through the heater core 32. The second warm air passage 303 is a passage that is located below and extends rearward of the vehicle among the two passages that pass through the heater core 32. The second cold air passage 304 is a lowermost portion of the passage downstream of the evaporator 31 and extends below the heater core 32 toward the rear of the vehicle.

Between the downstream passage of the evaporator 31 and the upstream passage of the heater core 32, a first air mix door 33 and a second air mix door 34 are provided in the heater core 32 so as to be aligned along the heat exchange section. .. The first air mix door 33 is a temperature control door that adjusts the air volume ratio between the air volume flowing through the first cold air passage 301 and the air volume flowing through the first warm air passage 302. The first air mix door 33 extends from a position where the first cold air passage 301 is fully closed and the first warm air passage 302 is fully opened to a position where the first cold air passage 301 is fully opened and the first warm air passage 302 is fully closed. It is movable over a range and can be displaced to any position. The second air mix door 34 is a temperature control door that adjusts the air volume ratio between the air volume flowing through the second warm air passage 303 and the air volume flowing through the second cold air passage 304. The second air mix door 34 extends from a position where the second warm air passage 303 is fully closed and the second cold air passage 304 is fully opened to a position where the second warm air passage 303 is fully opened and the second cold air passage 304 is fully closed. It is movable over a range and can be displaced to any position.

The first air mix door 33 and the second air mix door 34 are plate-like, film-like slide-type doors that move in parallel and are displaced. The control device controls the position of the first air mix door 33 and the position of the second air mix door 34 according to a command by a manual operation or a set temperature of the automatic air conditioner.

A foot passage 30e, which is a lower portion of the air-conditioning case 30 and which is in a rear portion of the vehicle, communicates with a foot outlet in the vehicle compartment through a duct. The foot passage 30e is located downstream of the second warm air passage 303 and the second cold air passage 304. The foot door 36 opens and closes the foot passage 30e depending on the rotational position of the door body that rotates around the rotation shaft portion. The control device controls the rotational position of the foot door 36 so as to open the foot passage 30e in the foot mode. The conditioned air blown toward the feet of the front seat occupants flows through the foot passage 30e.

Inside the air conditioning case 30, a first mixing unit 305 is provided downstream of the second warm air passage 303 and the second cold air passage 304, where the air flowing through these passages merges. The first mixing unit 305 communicates with the downstream side of the first warm air passage 302 above the inside of the air conditioning case 30. The third air mixing door 35 opens and closes the first mixing unit 305 according to the rotational position of the door body that rotates around the rotation shaft. The control device controls the rotational position of the third air mix door 35 so as to open the first mixing unit 305 in the face mode or the defroster mode. The first mixing unit 305 has a temperature at which warm air that has flowed through the first warm air passage 302 and warm air that has flowed through the second warm air passage 303 or cold air that has flowed through the second cold air passage 304 can join together. Configure the key area.

Inside the air conditioning case 30, there is provided a second mixing section 306 that communicates with the downstream side of the first warm air passage 302, the downstream side of the first cold air passage 301, and the downstream side of the first mixing section 305. The second mixing unit 306 is located behind the first cold air passage 301 in the vehicle and above the first warm air passage 302 and the first mixing unit 305.

A defroster passage 30b is provided in the upper part of the air conditioning case 30 so as to communicate with the defroster outlet in the vehicle compartment through a duct. A center face passage 30c communicating with the center face outlet in the vehicle compartment via a duct and a side face passage 30d communicating with the side face outlet in the vehicle compartment via a duct are provided above the air conditioning case 30. ing. The defroster passage 30b, the center face passage 30c, and the side face passage 30d are provided in the upper portion of the air conditioning case 30 over the entire vehicle width direction.

Air-conditioning air blown toward the window glass in the vehicle compartment flows through the defroster passage 30b. The defroster door 37 opens and closes the defroster passage 30b according to the rotational position of the door body that rotates around the rotation shaft portion. The control device controls the rotational position of the defroster door 37 so as to open the defroster passage 30b in the defroster mode. In the center face passage 30c, for example, conditioned air blown from the vicinity of the central portion of the instrument panel in the vehicle width direction toward the upper body of the front seat occupant flows. In the side face passage 30d, the conditioned air blown toward the upper body of the occupant flows from a pair of outlets provided on both sides in the vehicle width direction in the vehicle interior.

The defroster passage 30b is located above the second mixing section 306 and ahead of the center face passage 30c and the side face passage 30d in the vehicle. The center face passage 30c is located rearward of the vehicle from the defroster passage 30b and the side face passage 30d, and is located lower in the height direction, and is located rearward of the vehicle than the second mixing section 306 and the first cold air passage 301. There is. The first cold air passage 301, the second mixing portion 306, and the center face passage 30c are located in this order so as to be lined from the vehicle front side to the rear side.

The second mixing unit 306 constitutes a temperature control area where the cool air flowing through the first cold air passage 301 and the warm air flowing through the first warm air passage 302 join together. The second mixing unit 306 has a temperature at which the cool air flowing through the first cold air passage 301, the warm air flowing through the first warm air passage 302, and the conditioned air flowing through the first mixing unit 305 can join together. Configure the key area.

A rotary door 4 that opens or closes the center face passage 30c and the side face passage 30d according to the rotational position is provided in the upper portion of the air conditioning case 30. FIG. 1 shows a state in which the rotary door 4 is in a rotational position where the center face passage 30c and the side face passage 30d are opened. FIG. 2 shows a state in which the rotary door 4 is in a rotating position where it closes the center face passage 30c and the side face passage 30d.

The rotary door 4 constitutes one of the blowing mode switching mechanisms. The rotary door 4 constitutes a mechanism for switching between the face mode and a blowing mode other than the face mode. As shown in FIGS. 3 and 4, the rotary door 4 includes a rotating shaft portion 40, a pair of side wall portions 43 and 44 integrally provided with the rotating shaft portion 40, and a pair of side wall portions 43 and 44. And a first outer peripheral wall portion 41 and a second outer peripheral wall portion 42 that are integrally provided with the. The side wall portion 43 and the side wall portion 44 are plate-shaped portions that face each other with a predetermined gap in the vehicle width direction. A plate-shaped intermediate wall portion 45 is provided between the side wall portion 43 and the side wall portion 44. The intermediate wall portion 45 is provided integrally with the rotary shaft portion 40, like the side wall portions 43 and 44.

The first outer peripheral wall portion 41 and the second outer peripheral wall portion 42 form an arcuate cross-sectional shape centered on the rotation shaft portion 40, and define a pair of side wall portions 43, 44 and an outer peripheral end portion of the intermediate wall portion 45. Configure the door surface to be connected. Therefore, the inner space surrounded by the pair of side wall portions 43, 44, the first outer peripheral wall portion 41, and the second outer peripheral wall portion 42 is always connected to the air passage in the air conditioning case 30, and the conditioned air is It can be freely distributed. The outer surface of each outer peripheral wall has a surface having no irregularities. The second mixing portion 306 is located between the side wall portion 43 and the side wall portion 44. As a result, between the side wall portion 43 and the intermediate wall portion 45 and between the side wall portion 44 and the intermediate wall portion 45, the cold air flowing from the first cold air passage 301 and the warm air from the first warm air passage 302, It forms a passage for mixing with the conditioned air from the first mixing unit 305.

The first outer peripheral wall portion 41 is a portion that connects the side wall portion 43, the intermediate wall portion 45, and the side wall portion 44 on one side in the circumferential direction, for example, on the vehicle rear side, and constitutes a door body of the rotary door 4. The second outer peripheral wall portion 42 is a portion that connects the side wall portion 43, the intermediate wall portion 45, and the side wall portion 44 on the other side in the circumferential direction, for example, the vehicle front side, and constitutes the door body of the rotary door 4. The first outer peripheral wall portion 41 and the second outer peripheral wall portion 42 are circumferentially separated from each other, and are connected by a pair of side wall portions 43 and 44 and an intermediate wall portion 45. As shown in FIG. 2, in the foot mode, the first outer peripheral wall portion 41 closes the center face passage 30c, and the second outer peripheral wall portion 42 closes the side face passage 30d. The second outer peripheral wall portion 42 is provided with a through hole 42a. In the state where the second outer peripheral wall portion 42 closes the side face passage 30d, a small amount of conditioned air can be supplied from the side face outlet into the vehicle compartment through the through hole 42a.

As shown in FIG. 3, the rotary shaft portion 40 is rotatably supported at both ends thereof by bearing holes provided in a wall portion 30f which is a part of the air conditioning case 30. The first outer peripheral wall portion 41 and the second outer peripheral wall portion 42 have a length that protrudes outward from each of the pair of side wall portions 43 and 44 in the axial direction of the rotating shaft portion 40 or the vehicle width direction. ing. Between the side wall portion 43 and the wall portion 30f of the air-conditioning case 30, a pair of guide wall portions facing each other with a predetermined gap is provided. Between the side wall portion 44 and the wall portion 30f of the air-conditioning case 30, a pair of guide wall portions facing each other with a predetermined gap is provided. The set of guide wall portions includes a first guide wall portion 380 located on the vehicle rear side and a second guide wall portion 381 located on the vehicle front side of the first guide wall portion 380.

The pair of guide wall portions defines a warm air guide passage 38 that guides warm air to the defroster passage 30b or the face passage between the wall portion 30f facing the side wall portion 43 and the side wall portion 43. The warm air guide passage 38 is a passage formed by the side wall portion 43, the wall portion 30f, the first guide wall portion 380, and the second guide wall portion 381. The pair of guide wall portions defines a warm air guide passage 38 that guides warm air to the defroster passage 30b or the face passage between the wall portion 30f facing the side wall portion 44 and the side wall portion 44. The first guide wall portion 380 and the second guide wall portion 381 project from the wall portion 30f, and the tips thereof are slightly separated from the side wall portion 43 and the side wall portion 44. With this configuration, the first guide wall portion 380 and the second guide wall portion 381 circulate in the warm air guide passage 38 without hindering the behavior of the side wall portion 43 and the side wall portion 44 that rotate and move around the rotation shaft portion 40. During that time, most of the air contributes so as not to leak out of the warm air guide passage 38.

The warm air that has flowed from the first warm air passage 302 and the conditioned air that has flowed from the first mixing portion 305 flow between the pair of side wall portions and between the side wall portion 43 and the wall portion 30f. Flow and the flow flowing between the side wall portion 44 and the wall portion 30f. The flow that flows between the side wall portion 43 and the wall portion 30f and between the side wall portion 44 and the wall portion 30f passes through the warm air guide passage 38 and is guided to the defroster passage 30b or the face passage.

In this embodiment, the case where the face passage guided by the warm air guide passage 38 is the side face passage 30d is described as an example. The warm air guide passage 38 is a passage formed by the side wall portion 44, the wall portion 30f, the first guide wall portion 380, and the first guide wall portion 380.

As shown in FIG. 1, the first guide wall portion 380 and the second guide wall portion 381 are inclined with respect to the vehicle height direction so as to be located closer to the defroster passage 30b toward the downstream end portion. The first guide wall portion 380 and the second guide wall portion 381 are positioned such that their downstream end portions are closer to the defroster passage 30b in the vehicle front-rear direction than their upstream end portions.

The wall portion 30f of the air conditioning case 30 is provided with a wind shield wall 39 that is close to the side wall portion 43 and the side wall portion 44 when the rotary door 4 opens the face passage as shown in FIG. The wind shield wall 39 is a protruding wall that protrudes from the wall portion 30f of the air conditioning case 30. The wind shield wall 39 overlaps the side wall portion 43 and the side wall portion 44 in the vehicle width direction when the face passage is open as shown in FIG. 1, and closes the face passage as shown in FIG. It is installed at a position where it does not overlap in the vehicle width direction in the state. As shown in FIG. 1, in the wind shield wall 39, when the rotary door 4 opens the face passage and is close to the side wall portions 43 and 44, the cool air flowing toward the face passage is provided to the wall portion 30f and the side wall portion 43, 44. It is blocking the flow between 44 and. As a result, the cold air flowing through the first cold air passage 301 comes to flow between the pair of side wall portions 43 and 44. The face passage opened by the rotary door 4 is the center face passage 30c or the side face passage 30d.

The vehicle air conditioner 1 can implement a plurality of blowing modes. As one of the plurality of blowing modes, in the face mode shown in FIG. 1, the foot door 30 closes the foot passage 30e, the defroster door 37 closes the defroster passage 30b, and the rotary door 4 closes the center face passage 30c and the side face passage 30d. Open up. Further, the third air mixing door 35 opens the first mixing section 305. As a result, the conditioned air in which the cold air and the hot air intersect and are mixed inside the rotary door 4 flows in the center face passage 30c. In the side face passage 30d, the conditioned air in which the cold air and the hot air intersect and are mixed inside the rotary door 4 and the hot air flowing down in the hot air guide passage 38 flow.

In the foot mode shown in FIG. 2, the foot door 36 opens the foot passage 30e, the defroster door 37 opens the defroster passage 30b, and the rotary door 4 closes the center face passage 30c and the side face passage 30d. Further, the third air mix door 35 closes the first mixing section 305. As a result, the hot air flowing through the second warm air passage 303 flows through the foot passage 30e. In the defroster passage 30b, the conditioned air in which the warm air and the cold air flowing through the first warm air passage 302 intersect and mix inside the rotary door 4 and the hot air flowing down in the hot air guide passage 38 flow. Like The warm air that has flowed down the warm air guide passage 38 flows into the side face passage 30d through the through hole 42a.

In the defroster mode, the foot door 36 closes the foot passage 30e, the defroster door 37 opens the defroster passage 30b, and the rotary door 4 closes the center face passage 30c and the side face passage 30d. The third air mixing door 35 opens the first mixing unit 305. As a result, the warm air that has flowed through the first warm air passage 302 and the second warm air passage 303 is divided into a flow that flows into the inside of the rotary door 4 and a flow that flows into the warm air guide passage 38, and the defroster passage Both of these flows pass through 30b.

FIG. 5 shows the results of measuring the temperature change of the foot blown air and the temperature change of the defroster blown air according to the change in the opening degree of the air mix door in the conventional comparative example with respect to the first embodiment. The comparative example is a vehicle air conditioner that does not include a pair of guide wall portions, and has a configuration in which warm air flows only inside the rotary door. FIG. 6 shows the results of measuring the temperature change of the foot blown air and the temperature change of the defroster blown air according to the change in the opening degree of the air mix door in the vehicle air conditioner 1 of the first embodiment. As shown in FIG. 5 and FIG. 6, the measurement result in the vehicle air conditioner 1 of the first embodiment is different from the measurement result in the device of the comparative example by the temperature of the foot blown air and the temperature of the defroster blown air. It was confirmed that the difference was small. This result is because, as described above, the amount of warm air guided by the warm air guide passage 38 to the defroster passage 30b is larger than that in the comparative example.

The control device is an air conditioner ECU that controls various air conditioning devices connected to the output side thereof. The hardware and software that control the operation of each air conditioning device form a control device that controls the operation of each air conditioning component. The control device includes a device such as a microcomputer that operates according to a program as a main hardware element. The control device includes, for example, at least an interface unit to which each air conditioning device and various sensors are connected, an arithmetic processing unit, and a storage unit.

The storage unit is a non-transitional tangible storage medium that non-temporarily stores a computer-readable program. The storage medium can be provided by a semiconductor memory, a magnetic disk, or the like. The arithmetic processing unit is an arithmetic processing unit, and performs determination processing and arithmetic processing according to an arithmetic program using the environmental information acquired from various sensors through the interface unit and the control characteristic map and data stored in the storage unit. .. The arithmetic processing unit is an arithmetic execution unit and a determination processing execution unit in the control device. The interface unit operates each air conditioning device based on the determination result by the arithmetic processing unit and the arithmetic result. Therefore, the interface unit is an input unit and a control output unit in the control device. The air conditioning equipment includes a compressor, a fan motor of the blower 20, an outdoor fan, an inside/outside air switching door, various doors, and the like.

The control device controls the air intake mode and the blowout mode according to a command by a manual operation and a set temperature of the automatic air conditioner. The control device sets one of the outside air mode, the inside air mode, and the inside/outside air introduction mode as the air intake mode. The control device controls the rotational position of a predetermined door and sets a foot mode, a face mode, a defroster mode, or the like as the blowing mode. The control device controls the amount of air blown by the air blower 20 and the temperature adjustment of the conditioned air depending on the position of the air mix door in accordance with a command from the manual operation or the set temperature of the automatic air conditioner.

The operation and effect of the vehicle air conditioner 1 of the first embodiment will be described. The vehicle air conditioner 1 includes an air conditioning case 30, a defroster passage 30b provided in the air conditioning case 30, a face passage provided in the air conditioning case 30, and a ventilation amount to the defroster passage 30b or the face passage depending on the rotation position. And a rotary door 4 for controlling. The rotary door 4 includes a rotary shaft portion 40, a pair of side wall portions 43 and 44 that face each other in the axial direction of the rotary shaft portion 40 while facing each other and hot and cold winds intersect each other inside, and the rotary shaft portion 40. On the other hand, it has an outer peripheral wall part which is spaced radially outward and connects a pair of side wall parts to rotate integrally with the one set of side wall parts and the rotating shaft part 40. Inside the pair of side wall parts, hot air and cold air flow so as to intersect with each other. The vehicle air conditioner 1 includes a set of guide wall portions that partition and form a warm air guide passage 38 that guides warm air to the defroster passage 30b or the face passage. The pair of guide wall portions are provided at a distance from each other between the side wall portion and the wall portion 30f of the air-conditioning case 30 which is spaced apart from the side wall portion on the outer side in the axial direction of the rotary shaft portion 40.

According to this vehicle air conditioner 1, the hot air and the cold air flow inside the rotary door 4, that is, the inside of the pair of side walls so that the hot air and the cold air cross each other, so that the mixed air of the hot air and the cold air flows in the defroster passage 30b. And flow into the face passage. Further, a hot air guide passage 38 defined by a set of guide wall portions is provided outside the side wall portions 43 and 44 in the axial direction of the rotary shaft portion 40. With this configuration, the hot air can be preferentially distributed to the areas outside the side wall portions 43 and 44, and the amount of hot air supplied to the defroster passage 30b or the face passage can be increased. According to this vehicle air conditioner 1, it is possible to enhance the hot air guideability to the defroster outlet or the face outlet in the vehicle compartment.

The pair of guide wall portions is provided so as to be inclined with respect to the vehicle height direction so that the downstream end portion of the upstream end portion and the downstream end portion is located closer to the defroster passage 30b. According to this configuration, the warm air flowing through the warm air guide passage 38 flows down so as to approach the defroster passage 30b, and flows out of the warm air guide passage 38 with a velocity vector toward the defroster passage 30b. As a result, in addition to the warm air flow flowing between the pair of side wall portions, the hot air flow flowing outside the side wall portions can be further strengthened, so that it is possible to promote an increase in the air volume of the warm air to the defroster outlet. It is possible to increase the temperature.

The vehicle air conditioner 1 includes a wind shield wall 39 protruding from the wall portion 30f of the air conditioning case 30 so as to be close to the side wall portions 43 and 44 when the rotary door 4 opens the face passage. The wind shield wall 39 blocks cool air flowing toward the face passage from flowing between the wall portion 30f and the side wall portions 43 and 44 in a state of being close to the side wall portions 43 and 44.

According to this configuration, when the face passage is opened, the cold air flowing from the first cold air passage 301 toward the face passage is blocked by the wind shield wall 39 from flowing between the side wall portions 43 and 44 and the wall portion 30f. As a result, the cold air becomes dominant in the flow passing between the pair of side wall portions, and this flow collides with the hot air passing between the pair of side wall portions, so that the warm air is guided by the warm air guide passage 38. Will be more influx. Therefore, the amount of warm air that passes through the warm air guide passage 38 can be increased, so that it is possible to provide the vehicular air conditioner 1 with improved hot air guideability to the defroster outlet in the vehicle interior.

The pair of guide wall portions are protruding walls that protrude from the wall portion 30f of the air conditioning case 30 toward the side wall portions 43 and 44. With this configuration, it is possible to configure the warm air guide passage 38 that does not displace regardless of the rotational position of the rotary door 4. As a result, regardless of the position of each part in the rotary door 4, the warm air guide passage 38 is properly directed to the defroster passage 30b or the face passage, and a set of guide wall portions capable of guiding a desired amount of warm air is reliably formed. it can.

The pair of guide wall portions is provided between the side wall portions 43 and 44 and the wall portion 30f of the air-conditioning case 30 which is spaced apart from the rotation shaft portion 40 in the axial direction with respect to the pair of side wall portions 43 and 44, respectively. It is provided. With this configuration, it is possible to provide the vehicle air conditioner 1 including the hot air guide passages 38 defined by the pair of guide wall portions in both outer areas with respect to the pair of side wall portions. As a result, it is possible to provide the vehicle air conditioner 1 that can further increase the amount of warm air supplied to the defroster passage 30b or the face passage and increase the temperature of the blown air.

(Second embodiment)
The second embodiment will be described with reference to FIG. The configurations, operations, and effects that are not particularly described in the second embodiment are the same as those in the first embodiment, and only the points different from the first embodiment will be described below.

As shown in FIG. 7, the pair of guide wall portions of the second embodiment includes a second guide wall portion 1381. The second guide wall portion 1381 is installed such that the downstream side portion is tilted more toward the defroster passage 30b with respect to the vehicle height direction than the upstream side portion.

According to the second embodiment, the second guide wall portion 1381 located on the defroster passage 30b side of the set of guide wall portions is located closer to the defroster passage 30b than the upstream portion at the downstream side portion. It has a diverging portion 1381a that is greatly inclined. The divergent portion 1381a is a protruding wall whose upstream side portion is located closer to the defroster passage 30b than the downstream side portion.

According to this configuration, the end widening portion 1381a is provided at the downstream side portion of the second guide wall portion 1381 located on the defroster passage 30b side of the first guide wall portion 380. As a result, the warm air that flows outside the side wall portions 43 and 44 can be smoothly supplied to the defroster passage 30b, so that it is possible to promote an increase in the amount of warm air to the defroster air outlet and increase the temperature.

(Third Embodiment)
A third embodiment will be described with reference to FIG. In FIG. 8, components having the same configurations as those of the above-described embodiment are designated by the same reference numerals, and have the same operation and effect. The configurations, operations, and effects that are not particularly described in the third embodiment are the same as those in the above-described embodiment, and only differences from the above-described embodiment will be described below.

The rotary door 104 of the third embodiment includes side wall portions 43 and 44 in which a set of guide wall portions projects toward the wall portion 30f of the air conditioning case 30. The set of guide wall portions included in the rotary door 104 includes a first guide wall portion 460 located on the vehicle rear side and a second guide wall portion 461 located on the vehicle front side of the first guide wall portion 460. I'm out. As shown in FIG. 8, when the rotary door 104 is in the foot mode or the defroster mode in which the face passage is closed, the pair of guide wall portions are positioned to guide the warm air to the defroster passage 30b. 43 and 44 are provided.

According to the third embodiment, the set of guide wall portions is a protruding wall that protrudes from the side wall portions 43 and 44 toward the wall portion 30f of the air conditioning case 30. According to this configuration, the warm air guide passage 46 that is displaced according to the rotational position of the rotary door 104 can be configured. Accordingly, it is possible to provide a set of guide wall portions that vary the direction of the warm air guided by the warm air guide passage 46 and the guide air volume of the warm air according to the rotational position of the rotary door 104.

In the state where the rotary door 104 is in the rotation position for closing the face passage, the downstream end portion of the pair of guide wall portions is provided at a position for guiding the warm air to the defroster passage 30b. According to this configuration, the warm air guided by the warm air guide passage 46 flows down so as to approach the defroster passage 30b, and flows out of the warm air guide passage 46 with a velocity vector toward the defroster passage 30b. As a result, it is possible to suppress the wasteful warm air flow toward the face passage when the face passage is closed and efficiently increase the amount of warm air to the defroster outlet, thereby increasing the temperature of the defroster outlet air. You can

(Other embodiments)
The disclosure of this specification is not limited to the illustrated embodiments. The disclosure encompasses the illustrated embodiments and variations on them based on them. For example, the disclosure is not limited to the combination of parts and elements shown in the embodiments, and various modifications can be implemented. The disclosure can be implemented in various combinations. The disclosure may have additional parts that may be added to the embodiments. The disclosure includes parts and elements of the embodiments omitted. The disclosure includes replacements or combinations of parts, elements between one embodiment and another. The disclosed technical scope is not limited to the description of the embodiments. The disclosed technical scope is shown by the description of the claims, and should be understood to include meanings equivalent to the description of the claims and all modifications within the scope.

In the above-described embodiment, the warm air guide passages 38 and 46 formed by the pair of guide wall portions and the like are passages that guide the warm air to the defroster passage 30b or the side face passage 30d. Further, the warm air guide passages 38, 46 may be passages for guiding the warm air to another face passage, for example, the center face passage 30c, instead of the side face passage 30d.

4, 104... Rotary door, 30... Air conditioning case 30b... Defroster passage, 30d... Side face passage (face passage)
30f... Wall part, 38, 46... Warm air guide passage, 40... Rotating shaft part 41... 1st outer peripheral wall part (outer peripheral wall part), 42... 2nd outer peripheral wall part (outer peripheral wall part)
43, 44... Side wall portion, 380, 460... First guide wall portion (guide wall portion)
381, 1381, 461... Second guide wall portion (guide wall portion), 1381a... End widened portion

Claims (8)

An air conditioning case (30) having an air passage through which air conditioning air flows,
A defroster passage (30b) provided in the air conditioning case so that the conditioned air is blown toward the defroster outlet in the vehicle compartment;
A face passage (30d) provided in the air conditioning case so that the conditioned air is blown toward the face outlet in the vehicle interior;
A rotary door provided inside the air-conditioning case, the rotary door (40) and a set of a pair of hot air and cold air that intersect each other in the axial direction of the rotary shaft and face each other. An outer peripheral wall portion which is connected to the side wall portions (43, 44) and the rotation shaft portion so as to be radially outwardly spaced apart from each other and connects the pair of side wall portions to rotate integrally with the pair of the side wall portions and the rotation shaft portion. (41, 42), and a rotary door (4; 104) for controlling the amount of ventilation to the defroster passage or the face passage according to the rotational position,
A wall portion (30f) of the air-conditioning case, which is separated from the side wall portion to the outside in the axial direction, is provided with a space between the side wall portion and the side wall portion to allow hot air to flow through the defroster passage or the face passage. A set of guide wall portions (380, 381; 380, 1381; 460, 461) that form a warm air guide passage (38; 46) that guides to
An air conditioner for a vehicle, which includes: The said guide wall part is provided inclining with respect to a vehicle height direction so that the said downstream end part is located near the said defroster passage among an upstream end part and a downstream end part. Air conditioning system for vehicles. The guide wall portion (1381) located on the defroster passage side of the pair of guide wall portions is a diverging portion that largely inclines so as to be located closer to the defroster passage than the upstream portion at the downstream side portion ( The vehicle air conditioner according to claim 2, which has 1381a). An air shielding wall (39) projecting from the wall portion of the air conditioning case so as to be close to the side wall portion in a state where the rotary door opens the face passage,
3. The wind shield wall blocks cool air flowing toward the face passage from flowing between the wall portion and the side wall portion of the air conditioning case in a state of being close to the side wall portion. The vehicle air conditioner described in. The vehicle air conditioner according to any one of claims 1 to 4, wherein the pair of guide wall portions are projecting walls that project from the wall portion of the air conditioning case toward the side wall portion. The vehicle air conditioner according to any one of claims 1 to 4, wherein the pair of guide wall portions are projecting walls that project from the side wall portion toward the wall portion of the air conditioning case. 7. The vehicle according to claim 6, wherein the downstream end portion of the pair of guide wall portions is provided at a position that guides warm air to the defroster passage in a state where the rotary door is in a rotation position that closes the face passage. Air conditioner. The set of the guide wall portions is provided between the wall portion and the side wall portion of the air conditioning case that are spaced apart from each other in the axial direction with respect to each of the set of side wall portions. 9. The vehicle air conditioner according to claim 7.

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