JP5246151B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to a vehicle air conditioner.

  Conventionally, in a vehicle air conditioner, when performing, for example, a foot differential mode, a foot mode, or the like as a blow mode for blowing conditioned air from two blow outlets, the blow air temperature from the defroster blow outlet is higher than the blow air temperature from the foot blow outlet. In order to increase the temperature, there is one provided with a warm air passage for guiding the warm air from the heating heat exchanger to the defroster outlet (see, for example, Patent Document 1).

  The hot air passage is provided between a temperature adjusting door seal member provided on the inner wall surface of the casing and a hot air guide member disposed on the air downstream side of the seal member.

  The hot air guide member is disposed on the inner wall surface side of the casing with respect to the cold air bypass passage that bypasses the heat exchanger for heating and flows the cold air. Thus, the hot air passage is provided adjacent to the cold air bypass passage in the casing.

  By providing such a warm air passage, in addition to the mixed air from the mixing chamber in which the cold air from the cold air bypass passage and the warm air from the heating heat exchanger are mixed, Hot air from the passage is introduced. Only mixed air is introduced into the foot outlet from the mixing chamber. Therefore, the temperature of the air blown from the defroster outlet can be made higher than the temperature of the air blown from the foot outlet.

JP-A-10-236134

  In the above-mentioned Patent Document 1, as described above, the hot air passage is provided adjacent to the cold air bypass passage in the casing. For this reason, heat exchange between the hot air flowing in the hot air passage and the cold air in the cold air bypass passage reduces the temperature of the hot air in the hot air passage. Therefore, a sufficiently high temperature cannot be obtained as the temperature of air blown from the defroster outlet. Along with this, a sufficient temperature difference cannot be obtained as the temperature difference between the temperature of the air blown from the foot outlet and the temperature of the air blown from the defroster outlet.

  Further, as the hot air passage, it is possible to provide a groove as a hot air passage on the inner wall surface of the casing, but not between the temperature adjusting door seal member and the hot air guide member. When arranged adjacent to each other, as in the case of Patent Document 1 described above, the hot air flowing in the hot air passage and the cold air in the cold air bypass passage are heat-exchanged, and the hot air temperature in the hot air passage is changed. It will go down.

  Furthermore, in place of the hot air passage, for example, when a cold air passage that guides the cold air to the foot outlet is provided, the cold air passage and the hot air passage through which the hot air from the heating heat exchanger flows are arranged adjacent to each other. The cold air flowing in the cold air passage and the hot air in the hot air passage are heat-exchanged to increase the cold air temperature in the cold air passage. For this reason, a sufficiently low temperature cannot be obtained as the temperature of the cold air flowing through the foot outlet.

  In the present invention, when carrying out the blowing mode for blowing the conditioned air from the two outlets, the hot air temperature in the hot air passage for guiding the hot air to one of the two outlets is lowered. The first purpose is to suppress it.

  Further, the present invention suppresses an increase in the temperature of the cold air in the cold air passage for guiding the cold air to one of the two air outlets when the air blowing mode for blowing the air-conditioning air from the two air outlets is performed. This is the second purpose.

  In order to achieve the above object, the invention described in claim 1 includes a cooling heat exchanger (30), a heating heat exchanger (50), and a blowout port that is arranged downstream thereof and blows out conditioned air. In the vehicle air conditioner using a rotary door as the air outlet switching door, the air outlet switching door (60) for switching between the air outlet switching door (60) is housed in the case (10). A groove portion (92) is formed between the side walls (63, 64) of the rotary door to form a hot air passage for flowing hot air from the heat exchanger for heating, and a door is formed on the side wall of the rotary door. Side wall outlets (63a, 63b) are provided, and the door side wall outlet communicates with the inside of the groove when the rotary door is in a predetermined blowing mode where the conditioned air is blown from two outlets. Heating Warm air from the heat exchanger, the groove, characterized in that it has to be taken into one of the two outlet through the door side wall outlet.

  Thus, a warm air passage is formed between the groove formed on the inner surface of the case and the side wall of the rotary door to flow warm air from the heat exchanger for heating, and the side wall of the rotary door defines the inside of the groove. It is possible to isolate the warm air from the air flow introduced into the rotary door. Therefore, heat exchange between the warm air in the groove and the air flow introduced into the rotary door can be suppressed. Thereby, when implementing blowing mode, it can suppress that the warm air temperature in a groove part falls.

  According to a second aspect of the present invention, in the vehicular air conditioner according to the first aspect, the case is provided with a convex portion (90) projecting outward, and the heat for heating is provided on the convex portion. An air inlet (91) for introducing warm air from the exchanger and the groove are provided.

  Thereby, an air inlet and a groove part can be formed by using the convex part provided in the case.

  Invention of Claim 3 is the heat exchanger (30) for cooling, the heat exchanger for heating (50), and the blower outlet switching door which switches the blower outlet which is arrange | positioned in those downstream and blows an air-conditioning wind ( 60) is housed in the case (10) and a rotary door is used as the outlet switching door, the inner surface (18, 19) of the case has a side wall ( 63, 64) is formed with a groove portion (92) that constitutes a cool air passage through which cool air from the cooling heat exchanger flows, and a door side wall outlet (63a, 63b) is provided on the side wall of the rotary door. And when the rotary door is in a predetermined blowing mode where the conditioned air is blown out from two outlets, the door side wall outlet communicates with the groove and cool air from the cooling heat exchanger. But, Serial groove, characterized in that it has to be taken into one of the two outlet through the door side wall outlet.

  Thus, a warm air passage is formed between the groove formed on the inner surface of the case and the side wall of the rotary door to flow cool air from the heat exchanger for cooling. It is possible to isolate the cold air from the air flow introduced into the rotary door. Therefore, heat exchange between the cool air in the groove and the air flow introduced into the rotary door can be suppressed. Thereby, when implementing blowing mode, it can suppress that the cold wind temperature in a groove part goes up.

  According to a fourth aspect of the present invention, in the vehicle air conditioner according to the third aspect of the present invention, the case is provided with a convex portion (90) projecting outward from the case, and the cooling heat An air inlet (91) for introducing cold air from the exchanger and the groove are provided.

  Thereby, an air inlet and a groove part can be formed by using the convex part provided in the case.

  In the vehicle air conditioner according to any one of claims 1 to 4, specifically, as in the invention according to claim 5, one of the two outlets is a foot outlet, and the 2 The predetermined blowing mode for blowing the conditioned air from the two outlets is the bi-level mode for blowing the conditioned air from the face outlet and the foot outlet and / or the foot differential that blows the conditioned air from the foot outlet and the defroster outlet. It can be a mode.

  Further, as in the invention described in claim 6, one of the two air outlets is a foot air outlet, and the predetermined air outlet mode for blowing conditioned air from the two air outlets includes the face air outlet and the face air outlet. In the case of the bi-level mode for blowing conditioned air from the foot outlet and the foot differential mode for blowing conditioned air from the foot outlet and the defroster outlet, 1 and second door side wall outlets (63a, 63b) are provided, and in the foot differential mode, the first and second door side wall outlets communicate with the groove, and in the bi-level mode, The first door side wall outlet does not communicate with the groove, and the second door side wall outlet communicates with the groove. It can be.

  As a result, the two first and second door side wall outlets are provided as the door side wall outlets, so that a large amount of airflow can flow from the inside of the groove portion, and in the foot differential mode and the bi-level mode. In each case, the warm air from the warm air passage can be appropriately flowed to the foot outlet.

  In this case, as in the invention described in claim 7, a partition wall (100) is provided between the first door side wall outlet and the second door side wall outlet. If the ventilation from the second door side wall outlet is guided to the foot outlet, the effect of claim 6 can be obtained more appropriately.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

It is a figure which shows the cross-sectional structure of the vehicle air conditioner in 1st Embodiment of this invention. It is BB sectional drawing in FIG. It is C1-C1 sectional drawing in FIG. It is C2-C2 sectional drawing in FIG. It is a figure which shows the face mode in 1st Embodiment. It is DD sectional drawing in FIG. It is EE sectional drawing in FIG. It is a figure which shows the foot mode in 1st Embodiment. It is FF sectional drawing in FIG. It is GG sectional drawing in FIG. It is a figure which shows the foot differential mode in 1st Embodiment. It is HH sectional drawing in FIG. It is JJ sectional drawing in FIG. It is a figure which shows the differential mode in 1st Embodiment. It is KK sectional drawing in FIG. It is LL sectional drawing in FIG. It is a figure which shows the cross-sectional structure of the vehicle air conditioner in 2nd Embodiment of this invention. It is a figure which shows the face mode in 2nd Embodiment. It is a figure which shows the foot mode in 2nd Embodiment. It is a figure which shows the foot differential mode in 2nd Embodiment. It is a figure which shows the differential mode in 2nd Embodiment. It is a figure which shows the foot mode in the 1st modification of 2nd Embodiment. It is a figure which shows the face mode in 2nd Embodiment 1st modification. It is a figure which shows the bilevel mode in the 1st modification of 2nd Embodiment. It is a figure which shows the foot differential mode in the 1st modification of 2nd Embodiment. It is a figure which shows the differential mode in the 1st modification of 2nd Embodiment. It is a figure which shows the foot differential mode in the 2nd modification of 2nd Embodiment. It is a figure which shows the face mode in 2nd Embodiment 2nd modification. It is a figure which shows the bilevel mode in the 2nd modification of 2nd Embodiment. It is a figure which shows the foot mode in the 2nd modification of 2nd Embodiment. It is a figure which shows the differential mode in the 2nd modification of 2nd Embodiment. It is a figure which shows the cross-sectional structure of the vehicle air conditioner in 3rd Embodiment of this invention. It is a figure which shows the bilevel mode in 3rd Embodiment. It is a figure which shows the foot mode in 3rd Embodiment. It is a figure which shows the foot differential mode in 3rd Embodiment. It is a figure which shows the differential mode in 3rd Embodiment. It is a figure which shows the face mode in the 1st modification of 3rd Embodiment. It is a figure which shows the bilevel mode in 3rd Embodiment 1st modification. It is a figure which shows the foot mode in the 1st modification of 3rd Embodiment. It is a figure which shows the foot differential mode in the 1st modification of 3rd Embodiment. It is a figure which shows the differential mode in the 1st modification of 3rd Embodiment. It is a figure which shows the face in the 2nd modification of 3rd Embodiment. It is a figure which shows the bilevel mode in 3rd Embodiment 2nd modification. It is a figure which shows the foot differential mode in the 2nd modification of 3rd Embodiment. It is a figure which shows the foot differential mode in the 2nd modification of 3rd Embodiment. It is a figure which shows the differential mode in the 2nd modification of 3rd Embodiment. It is a figure which shows the cross-sectional structure of the vehicle air conditioner in 4th Embodiment of this invention. It is a figure which shows the bilevel mode in 4th Embodiment. It is a figure which shows the foot mode in 4th Embodiment. It is a figure which shows the foot differential mode in 4th Embodiment. It is a figure which shows the differential mode in 4th Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other are given the same reference numerals in the drawings in order to simplify the description.

(First embodiment)
FIG. 1 shows a first embodiment of a vehicle air conditioner according to the present invention. FIG. 1 is a cross-sectional view of a vehicle air conditioner viewed from the vehicle width direction. In FIG. 1, the up and down arrows indicate the direction when the vehicle air conditioner is mounted on the vehicle. The up arrow indicates the Tenchi region improvement side, the down arrow indicates the top and bottom direction, the front arrow indicates the vehicle front-rear direction front side, and the rear arrow indicates the vehicle front-rear direction rear side.

  The vehicle air conditioner 1 is disposed at the center in the vehicle width direction below the instrument panel on the front side of the vehicle interior. The vehicle air conditioner 1 includes a case 10, an inside / outside air switching door 20, a filter 25, a cooling heat exchanger 30, a blower unit 40, a heating heat exchanger 50, and an outlet switching door 60.

  The case 10 includes an outside air opening 11, an inside air opening 12, a drain outlet 13, a defroster opening 14, a face opening 15, and a foot opening 16.

  The outside air opening 11 is provided on the vehicle front side of the case 10 and opens on the upper side. The inside air opening 12 is provided on the vehicle front side of the case 10 and opens downward. The openings 14, 15, 16 are arranged on the upper side of the case 10 on the rear side of the vehicle.

  The inside / outside air switching door 20 swings about the shaft 21 and opens at least one of the openings 11 and 12. The solid line in the figure indicates a state in which the outside air opening 11 is closed and the inside air opening 12 is opened, and the chain line in the figure indicates a state in which the outside air opening 11 is opened and the inside air opening 12 is closed. The drain discharge port 13 discharges condensed water generated in the heat exchanger 30 for cooling, and is provided below the inside air opening 12 in the case 10 and opens to the front side of the vehicle.

  The cooling heat exchanger 30 is disposed on the vehicle rear side with respect to the openings 11 and 12 in the case 10. The cooling heat exchanger 30 constitutes a known refrigeration cycle apparatus that circulates refrigerant together with a compressor, a condenser, and an expansion valve, and cools air introduced from the openings 11 and 12 by evaporation of the refrigerant. The filter 25 is disposed between the cooling heat exchanger 30 and the inside / outside air switching door 20 to remove foreign matters such as dust contained in the air introduced from the openings 11 and 12.

  The blower unit 40 is disposed on the rear side of the vehicle with respect to the cooling heat exchanger 30 in the case 10. The blower unit 40 includes a centrifugal blower 41 and a scroll casing 42. The centrifugal blower 41 blows out the air sucked from the axial direction of the rotating shaft to the outer peripheral side in the radially outward direction. The scroll casing 42 blows the air flow blown from the centrifugal blower 41 to the upper side of the vehicle.

  The heat exchanger 50 for heating is arrange | positioned in the vehicle front side above the ventilation unit 40 among the cases 10, and heats the cold wind which blows off from the heat exchanger 30 for cooling with engine cooling water (hot water).

  Here, a cold air bypass passage 17 is provided on the rear side of the case 10 with respect to the heat exchanger 50 for heating. The cold air bypass passage 17 is a passage that bypasses the heat exchanger 50 for heating and flows the air (cold air) of the air blowing unit 40.

  The air mix door 55 is disposed below the heating heat exchanger 50 and the cold air bypass passage 17 in the case 10. The air mix door 55 is a plate-like slide door supported so as to be movable in the front-rear direction with respect to the case 10.

  The air mix door 55 of this embodiment is provided with teeth that mesh with the circular gear 55a. The air mix door 55 moves in the front-rear direction as the circular gear 55a rotates. The circular gear 55a is rotated by the rotational force of the drive shaft 55b.

  The air mix door 55 adjusts the ratio of the air passage area on the heating heat exchanger 50 side in the case 10 to the air passage area of the cold air bypass passage 17 by moving in the front-rear direction. Thereby, by adjusting the ratio of the amount of air flowing into the cold air bypass passage 17 and the amount of air flowing into the heating heat exchanger 50 out of the amount of air blown out from the blower unit 40, the openings 14, 15, 16 The blown air temperature can be adjusted.

  The outlet switching door 60 is a rotary door that opens any one of the openings 14, 15, and 16 of the case 10 by its rotation. Hereinafter, the configuration of the outlet switching door 60 will be described with reference to FIGS. 2 is a sectional view taken along line BB in FIG. 1, FIG. 3 is a sectional view taken along line C1-C1 in FIG. 1, and FIG. 4 is a sectional view taken along line C2-C2 in FIG.

  As shown in FIGS. 1 and 2, the air outlet switching door 60 includes outer peripheral walls 61 and 62, a door right side wall 64, a door left side wall 63, and rotating shafts 65 and 66.

  The outer peripheral wall 61 is a first outer peripheral wall formed so as to extend in the circumferential direction around the axis of the rotation shafts 65 and 66. The outer peripheral wall 62 is a second outer peripheral wall disposed in the clockwise direction (one side in the circumferential direction) with respect to the outer peripheral wall 61. The outer peripheral wall 62 is formed to extend in the circumferential direction around the axis of the rotary shafts 65 and 66.

  A door opening 67 is provided between the outer peripheral walls 61 and 62 in the clockwise direction with respect to the outer peripheral wall 61. A door opening 68 is provided between the outer peripheral walls 61 and 62 in the counterclockwise direction (the other side in the circumferential direction) with respect to the outer peripheral wall 61.

  Here, the openings 14, 15, 16 of the case 10 are arranged on the radially outer peripheral side of the rotation shafts 65, 66 with respect to the outer peripheral walls 61, 62.

  The openings 14, 15, 16 are arranged in the clockwise direction (one direction in the circumferential direction) around the axis of the rotation shafts 65, 66 in the order of the openings 14, 15, 16.

  The defroster opening 14 communicates with the defroster outlet 70 through the air conditioning duct 14a. The defroster outlet 70 opens toward the inner surface of the vehicle front glass. The face opening 15 communicates with the face outlet 71 through the air conditioning duct 15a. The face outlet 71 opens toward the passenger's upper body. The foot opening 16 communicates with the foot outlet 72 through the air conditioning duct 16a. The foot outlet 72 opens toward the passenger's lower half.

  Moreover, the door right side wall 64 of the blower outlet switching door 60 is formed in a disk shape as shown in FIG. The door right side wall 64 is disposed along the inner surface 19 (see FIG. 4) on the right side in the vehicle width direction of the case 10. The door right side wall 64 is disposed on the right side in the vehicle width direction (one side in the axial direction of the rotation shafts 65 and 66) with respect to the outer peripheral walls 61 and 62.

  The right side wall 10c of the case 10 is provided with a recess 10d that is recessed to the right in the vehicle width direction. The inner surface 19 of the case 10 is formed as the bottom of the recess 10d.

  The right side wall 10c of the case 10 is provided with a protrusion 90 that protrudes from the inner surface 19 to the right in the vehicle width direction. The convex portion 90 has a convex shape that swells to the outside of the case 10 so as to cover the side surface of the outlet switching door 60 from the downstream side of the heat exchanger 50 for heating. As shown in FIG. 1, the convex portion 90 is provided with an air inlet 91 and a groove 92.

  The air introduction port 91 is disposed in the vicinity of the hot air outlet of the heating heat exchanger 50 and at a position offset with respect to the door right side wall 64. That is, the air inlet 91 is disposed on the upper side of the heating heat exchanger 50 and on the front side of the door right side wall 64.

  The groove portion 92 is for configuring a warm air passage through which the warm air from the heating heat exchanger 50 flows, and is formed from the warm air outlet side of the heating heat exchanger 50 toward the foot opening 16 side. Yes. The groove portion 92 is formed so as to be covered by the door right side wall 64. That is, the groove 92 and the door right side wall 64 form a warm air passage through which warm air from the heat exchanger for heating flows.

  As shown in FIG. 2, an inclined portion 92 a is provided on the side of the air inlet 91 at the bottom of the groove portion 92 so as to become deeper toward the foot opening 16. As will be described later, the inclined portion 92a guides the warm air introduced from the air introduction port 91 toward the foot opening portion 16 side of the groove portion 92.

  The door left side wall 63 has a line-symmetric shape with respect to the door right side wall 64 about the vehicle width direction center line S1 (see FIG. 3). The door left side wall 63 is formed in a disk shape along the inner surface 18 on the left side in the vehicle width direction of the case 10. The door left side wall 63 is disposed on the other axial side of the rotary shafts 65 and 66 (left side in the vehicle width direction) with respect to the outer peripheral walls 61 and 62.

  Here, the left side wall 10a of the case 10 has an axisymmetric shape with respect to the right side wall 10c about the vehicle width direction center line S1 (see FIG. 3). The left side wall 10a is provided with a recess 10b having the inner surface 18 as a bottom. The recess 10b has a line-symmetric shape with respect to the recess 10d of the right side wall 10c with respect to the center line S1 in the vehicle width direction (see FIG. 3). Similar to the right side wall 10c, the left side wall 10a is provided with a protrusion 90, an air inlet 91, and a groove 92.

  As shown in FIG. 2, the rotary shaft 65 is formed so as to protrude from the door right side wall 64 to the right side in the vehicle width direction. The rotating shaft 65 is rotatably supported with respect to the right side wall 10c in a state of passing through the through hole of the right side wall 10c of the case 10.

  The rotation shaft 66 is formed so as to protrude from the door left side wall 63 to the left side in the vehicle width direction. The rotating shaft 66 is arranged so that the axial direction thereof coincides with the axial direction of the rotating shaft 65. The rotating shaft 66 is rotatably supported with respect to the left side wall 10a in a state of passing through the through hole of the left side wall 10a of the case 10.

  As shown in FIG. 1, door side wall outlets 63 a and 63 b are provided on the door opening 67 side of the door right side wall 64 of the outlet switching door 60. The door side wall outlets 63a and 63b are formed in a fan shape centering on the axis of the rotary shafts 65 and 66, respectively. The door side wall outlet 63a and the door side wall outlet 63b are arranged in the clockwise direction around the rotation shafts 65 and 66 in the order of the door side wall outlets 63a and 63b.

  A partition wall 100 is provided between the door side wall outlets 63a and 63b. The partition wall 100 is disposed with its wall surface directed in the rotation direction about the axis of the rotation shafts 65 and 66. The partition wall 100 is formed between the door right side wall 64 and the door left side wall 63.

  Similarly to the door right side wall 64, door side wall outlets 63a and 63b are provided on the door left side wall 63.

  Next, the operation of this embodiment will be described.

  First, as shown in FIG. 1, when the inside / outside air switching door 20 closes the outside air opening 11 and opens the inside air opening 12, the operation of the air blowing unit 40 causes the vehicle interior air to pass through the inside air opening 12. 10 (see arrow N in FIG. 1). The introduced air passes through the filter 25 and flows into the cooling heat exchanger 30. The inflowed air is cooled by the cooling heat exchanger 30 and blown out from the cooling heat exchanger 30 as cold air (see arrow R in FIG. 1). The cold air is sucked into the centrifugal blower 41 of the blower unit 40 and blown upward from the scroll casing 42.

  When the air mix door 55 opens the cold air bypass passage 17 side air passage and the heating heat exchanger 50 side air passage, respectively, as shown in FIG. It flows to the cold air bypass passage 17 side, and the remaining cold air flows into the heat exchanger 50 for heating. The inflowing cold air is heated by the heating heat exchanger 50 and blown out as hot air from the heating heat exchanger 50 (see arrow D in FIG. 1).

  1 to 4 show the state of the bilevel mode. In this bi-level mode, the outer peripheral wall 61 closes the defroster opening 14, the door opening 67 communicates with each of the face opening 15 and the foot opening 16, and the door opening 68 further has a heating heat exchanger 50. And the cold air outlet side of the cold air bypass passage 17 communicate with each other.

  At this time, the hot air from the heating heat exchanger 50 and the cold air from the cold air bypass passage 17 flow into the outlet switching door 60 through the door opening 68. For this reason, the mixed air of warm air and cold air flows to the face outlet 71 through the door opening 67 and the face opening 15 (see arrow K in FIG. 3). As a result, the mixed air is blown out from the face outlet 71 toward the upper body of the occupant. Further, the mixed air in the outlet switching door 60 (see arrow K in FIG. 2) flows to the foot opening 16 through the door opening 67, and the mixed air that has flowed flows to the foot outlet 72.

  In this bi-level mode, as shown in FIG. 1, the door side wall outlet 63b of the door right side wall 64 communicates with the groove portion 92 of the right side wall 10c of the case 10, and the door side wall outlet 63a of the door right side wall 64 is a groove portion. Offset to 92.

  Therefore, the warm air from the heating heat exchanger 50 flows into the air inlet 91 of the right side wall 64 of the door, and this warm air is inclined by the inclined portion 92a and the foot opening 16 of the groove portion 92 of the right side wall 10c of the case 10. And then flows through the groove 92 and flows into the foot opening 16. Here, since the partition wall 100 is located between the openings 15 and 16 of the case 10 in the circumferential direction, the warm air flowing out from the door side wall outlet 63b after passing through the groove portion 92 is guided by the partition wall 100 to the foot. It will flow to the opening 16.

  Further, the door side wall outlet 63 b of the door left side wall 63 communicates with the groove portion 92 of the left side wall 10 a of the case 10, and the door side wall outlet 63 a of the door left side wall 63 is offset with respect to the groove portion 92. For this reason, the warm air from the heating heat exchanger 50 flows into the groove portion 92 of the left side wall 10a of the case 10 through the air inlet port 91 of the door left side wall 63, and this hot air flows into the groove portion 92 from the air inlet port 91. After passing through, it flows out from the door side wall outlet 63b. The warm air that has flowed out is guided by the partition wall 100 and flows into the foot opening 16.

  In this way, the warm air flowing from the door side wall outlet 63b to the foot opening 16 and the mixed air mixed in the air outlet switching door 60 are mixed in the air conditioning duct 16a and blown out from the foot air outlet 72 to the feet of the passengers. Is done.

  Next, the operation in the face mode will be described. When the state of FIGS. 5 to 7 is reached by the rotation of the air outlet switching door 60, the face mode is set. 6 is a cross-sectional view taken along the line DD in FIG. 5, and FIG. 7 is a cross-sectional view taken along the line EE in FIG.

  The outer peripheral wall 61 closes the defroster opening 14, the door opening 67 communicates with the face opening 15, and the outer peripheral wall 62 closes the foot opening 16. In addition, the door side wall outlets 63 a and 63 b of the door right side wall 64 are offset with respect to the groove portion 92 of the right side wall 10 c of the case 10. Door side wall outlets 63 a and 63 b of the door left side wall 63 are offset with respect to the groove portion 92 of the left side wall 10 a of the case 10.

  At this time, the hot air from the heating heat exchanger 50 and the cold air from the cold air bypass passage 17 flow into the air outlet switching door 60 through the door opening 68 and are mixed. Then, a mixed air of warm air and cold air (see arrow K in FIG. 5) is blown out toward the occupant upper body through the face opening 15 and the face outlet 71.

  Next, the operation in the foot mode will be described. When the state of FIGS. 8 to 10 is reached by the rotation of the air outlet switching door 60, the foot mode is set. 9 is a sectional view taken along line FF in FIG. 8, and FIG. 10 is a sectional view taken along line GG in FIG.

  In the example shown in FIG. 8, the inside / outside air switching door 20 closes the inside air opening 12 and opens the outside air opening 11 to introduce air outside the vehicle compartment (see arrow G in FIG. 8) into the case 10. Yes.

  In this foot mode, the door opening 68 communicates with the defroster opening 14 slightly, the outer peripheral wall 61 closes the face opening 15, and the door opening 67 communicates with the foot opening 16.

  At this time, the hot air from the heating heat exchanger 50 and the cold air from the cold air bypass passage 17 flow into the air outlet switching door 60 through the door opening 68 and are mixed. For this reason, the mixed air of warm air and cold air is blown out toward the inner surface of the vehicle front glass through the defroster opening 14 and the defroster outlet 70.

  Further, the mixed air from inside the outlet switching door 60 flows from the foot opening 16 to the foot outlet 72.

  Here, the door side wall outlets 63 a and 63 b of the door right side wall 64 communicate with the groove portion 92 of the right side wall 10 c of the case 10. For this reason, the warm air from the heating heat exchanger 50 flows to the foot opening 16 through the air inlet 91, the groove 92, and the door side wall outlets 63a and 63b of the right side wall 10c of the case 10.

  In addition, the door side wall outlets 63 a and 63 b of the door left side wall 63 communicate with the groove 92 of the left side wall 10 a of the case 10. For this reason, the warm air from the heating heat exchanger 50 flows to the foot opening 16 through the air inlet 91, the groove 92, and the door side wall outlets 63a and 63b of the left side wall 10a of the case 10.

  In this way, the warm air flowing from the door side outlets 63a and 63b to the foot opening 16 and the mixed air mixed in the air outlet switching door 60 are mixed in the air conditioning duct 16a, and the feet of the occupant from the foot air outlet 72 are mixed. Is blown out.

  Next, the operation in the foot differential mode will be described. When the state of FIGS. 11 to 13 is reached by the rotation of the air outlet switching door 60, the foot differential mode is set. 12 is a cross-sectional view taken along line HH in FIG. 11, and FIG. 13 is a cross-sectional view taken along line JJ.

  In the foot differential mode, the door opening 68 communicates with the hot air outlet side of the heat exchanger 50 for heating and the defroster opening 14, the outer peripheral wall 61 closes the face opening 15, and the door opening 67 is the foot opening. 16 and the cold air outlet side of the cold air bypass passage 17 communicate with each other.

  In addition, the door side wall outlets 63 a and 63 b of the door right side wall 64 communicate with the groove portion 92 of the right side wall 10 c of the case 10. Door side wall outlets 63 a and 63 b of the door left side wall 63 communicate with the groove portion 92 of the left side wall 10 a of the case 10.

  Next, the operation in the defroster mode will be described. When the state of FIGS. 14 to 16 is reached by the rotation of the outlet switching door 60, the defroster mode is set. 15 is a KK sectional view in FIG. 14, and FIG. 16 is an LL sectional view in FIG.

  In the defroster mode, the air mix door 55 opens the air passage on the heating heat exchanger 50 side in the case 10 and closes the air passage of the cold air bypass passage 17. Thereby, all the cold air flows from the blower unit 40 to the heat exchanger 50 for heating. The cold air is heated by the heating heat exchanger 50 and blown out to the outlet switching door 60 as hot air.

  In the defroster mode, the door opening 68 communicates with the hot air outlet side of the heating heat exchanger 50 and the defroster opening 14, the door opening 67 communicates with the cold air bypass passage 17, and the outer peripheral wall 61 opens. Close parts 15 and 16.

  At this time, warm air from the heat exchanger 50 for heating flows into the outlet switching door 60, and the warm air that has flowed in passes through the defroster opening 14 and the defroster outlet 70 to the inner surface of the front glass of the vehicle. Is blown out.

  According to the present embodiment described above, in the bi-level mode, the warm air from the heating heat exchanger 50 flows into the foot opening 16 through the groove 92 of the left side wall 10a of the case 10. Hot air from the heating heat exchanger 50 flows into the foot opening 16 through the groove 92 of the right side wall 10 c of the case 10.

  Here, the groove portion 92 of the right side wall 10 c is covered with the door right side wall 64. The groove portion 92 of the left side wall 10 a is covered with the door left side wall 63. For this reason, when the warm air flows in the groove 92, the door side wall 64 (63) isolates the warm air in the groove 92 and the air flow in the outlet switching door 60. It is possible to suppress heat exchange with the air flow in the blower outlet switching door 60. Therefore, when the bi-level mode is performed, it is possible to prevent the hot air temperature from being lowered when the hot air flows in the groove 92 (that is, the hot air passage). For this reason, a sufficient temperature difference between the air temperature at the face outlet 71 and the air temperature at the foot outlet 72 can be secured.

  Similarly, in the foot mode and the foot differential mode, the warm air from the heating heat exchanger 50 flows into the foot opening 16 through the groove 92 of the side wall 10c (10a) of the case 10. For this reason, when the warm air flows in the groove 92, the warm air in the groove 92 is separated from the warm air in the groove 92 and the air flow in the outlet switching door 60 by the door side wall 64 (64). It is possible to suppress heat exchange with the air flow in the blower outlet switching door 60. Therefore, when the foot mode and the foot differential mode are performed, it is possible to suppress the warm air temperature from being lowered when the warm air flows in the groove portion 92 (that is, the warm air passage). For this reason, the temperature difference between the blowing air temperature of the defroster blowing port 70 and the blowing air temperature of the foot blowing port 72 can be sufficiently secured.

  In the present embodiment, in the bi-level mode, the partition wall 100 is located between the openings 15 and 16 in the circumferential direction. For this reason, the partition wall 100 guides the warm air from the door side wall outlet 63 b to the foot opening 16. For this reason, the warm air of the groove part 92 can be favorably flowed toward the foot opening part 16.

  In the present embodiment, an inclined portion 92 a is provided on the side of the air inlet 91 at the bottom of the groove 92 so as to become deeper toward the foot opening 16. The inclined portion 92a guides the warm air introduced from the air introduction port 91 toward the foot opening 16 side of the groove portion 92. For this reason, the warm air from the heat exchanger 50 for heating can be favorably flowed from the air inlet 91 to the foot opening 16 side of the groove 92.

  Further, in the case of the above-mentioned Patent Document 1, if the passage cross-sectional area of the hot air passage is increased so that a large amount of hot air flows, the temperature of the air blown from the foot outlet is sufficiently increased, and the foot It is possible to ensure a sufficient temperature difference between the blowout air temperature at the blowout port and the blowout air temperature at the defroster blowout port, resulting in an increase in the size of the case.

  On the other hand, in this embodiment, as described above, the door side wall 64 (63) isolates the warm air in the groove portion 92 from the air flow in the outlet switching door 60, and the hot air in the groove portion 92 is separated. And the air flow in the outlet switching door 60 are restrained from heat exchange. Thereby, it is possible to suppress heat exchange between the warm air in the groove 92 and the air flow in the outlet switching door 60 without increasing the passage cross-sectional area of the warm air passage. Therefore, it is possible to reduce the size of the case 10.

  In this embodiment, the groove part 92 is provided in the convex part 90 of the side wall 10c (10a) of the case 10 as mentioned above. For this reason, the cross-sectional area of the air passage of the groove part 92 can be easily set to a desired magnitude | size by adjusting the magnitude | size of the convex part 90. FIG.

  In the present embodiment, as described above, door side wall outlets 63a and 63b are provided on the door side walls 64 and 63 in order to allow the warm air from the groove 92 to flow through the foot opening 16. For this reason, by adjusting the position or opening area of the door side wall outlets 63a and 63b, the amount of hot air flowing from the groove 92 to the foot opening 16 is changed, or the blowing mode for causing the groove 92 to function as a hot air passage is changed. It becomes easy to do. For this reason, there is a merit in the adjustment (tuning) of the control characteristic of the blowing temperature of the blowing ports 70, 71, 72.

  In the present embodiment, the groove 92 is provided on each of the inner wall surfaces 18 and 19 of the case 10 as described above. For this reason, as compared with the case where one groove portion 92 is provided in the case 10, a larger amount of airflow can be made to flow through the door opening portion 67 to the foot opening portion 16.

(Second Embodiment)
In the first embodiment described above, in the three blowout modes such as the bi-level mode, the foot mode, and the foot differential mode, the door right side wall 64 is between the warm air in the groove portion 92 and the air flow in the outlet switching door 60. In the present embodiment, the door right side wall 64 is warm air in the groove 92 only in the bi-level mode (or only in the foot mode and only in the foot differential mode). And heat exchange between the air flow in the outlet switching door 60 are suppressed.

  FIG. 17 shows the configuration of the vehicle air conditioner of this embodiment. FIG. 17 is a cross-sectional view of the air outlet switching door 60 and its periphery in the vehicle air conditioner viewed from the vehicle width direction.

  In the present embodiment, the door right side wall 64 of the outlet switching door 60 is provided with only the door side wall outlet 63b among the door side wall outlets 63a and 63b shown in FIG. Although not shown, similarly, the door left side wall 63 of the outlet switching door 60 is provided with only the door side wall outlet 63b among the door side wall outlets 63a and 63b.

  The end portion on the foot opening 16 side of the groove portion 92 of the right side wall 10c of the case 10 is located on the face opening portion 15 side. Although not shown, similarly, the foot opening 16 side end of the groove 92 of the left side wall 10a of the case 10 is located on the face opening 15 side.

  FIG. 17 shows the state of the bilevel mode. In the bi-level mode, the door side wall outlet 63b of the door right side wall 64 communicates with the groove portion 92 of the right side wall 10c of the case 10, and the door side wall outlet 63b of the door left side wall 63 enters the groove portion 92 of the left side wall 10a of the case 10. Communicate.

  FIG. 18 shows the state of the face mode. In the face mode, the door side wall outlet 63b of the door right side wall 64 is offset from the groove portion 92 of the right side wall 10c of the case 10, and the door side wall outlet 63b of the door left side wall 63 is offset from the groove portion 92 of the left side wall 10a of the case 10. Yes.

  Similarly, in the foot mode (see FIG. 19), the foot differential mode (see FIG. 20), and the defroster mode (see FIG. 21), the door side wall outlet 63b of the door side wall 64 (63) is formed on the side wall 10c (10a) of the case 10. The groove 92 is offset from the inside.

  In the present embodiment described above, the door side wall outlet 63b of the door side wall 64 (63) communicates with the groove portion 92 of the case 10 only in the bi-level mode. For this reason, only in the bi-level mode, the door side wall 64 (63) isolates the warm air in the groove 92 from the air flow in the outlet switching door 60, and the hot air in the groove 92 and the outlet switching door. Heat exchange with the air flow in 60 can be suppressed.

In the embodiment described above, the door side wall 63 (64) suppresses heat exchange between the warm air in the warm air passage of the groove 92 and the air flow in the outlet switching door 60 only in the bi-level mode. Instead of this, the following may be used instead.
(1) Only in the foot mode, heat exchange between the warm air in the groove 92 and the air flow in the outlet switching door 60 may be suppressed. 22 shows the foot mode, FIG. 23 shows the face mode, FIG. 24 shows the bi-level mode, FIG. 25 shows the foot differential mode, and FIG. 26 shows the defroster mode.

  In this case, as shown in FIG. 22, the end portion on the foot opening portion 16 side in the groove portion 92 of the side wall 10c (10a) of the case 10 is located on the opposite side to the face opening portion 15 in the circumferential direction.

In the foot mode, the door side wall outlet 63 b of the door side wall 64 (63) communicates with the groove portion 92 of the case 10. In the face mode, foot mode, foot differential mode, and defroster mode, the door side wall outlet 63b of the door side wall 64 (63) is offset from the groove 92 of the case 10. Therefore, only in the foot mode, the door side wall 64 (63) isolates the warm air in the groove 92 from the air flow in the outlet switching door 60, and the door side wall 64 (63) has the warm air in the groove 92. And heat exchange between the air flow in the outlet switching door 60 can be suppressed.
(2) Only in the foot differential mode, heat exchange between the warm air in the groove 92 of the side wall 10c (10a) of the case 10 and the air flow in the outlet switching door 60 may be suppressed. .

  27 shows the foot differential mode, FIG. 28 shows the face mode, FIG. 29 shows the bi-level mode, FIG. 30 shows the foot mode, and FIG. 31 shows the defroster mode.

  In this case, as shown in FIG. 27, the end portion on the foot opening 16 side in the groove portion 92 of the side wall 10c (10a) of the case 10 is located on the opposite side to the face opening portion 15 in the circumferential direction. In the door side wall 64 (63) of the outlet switching door 60, only the door side wall outlet 63a is provided among the door side wall outlets 63a and 63b shown in FIG.

  In the foot differential mode, the door side wall outlet 63 a communicates with the groove portion 92 of the case 10. In the face mode, foot mode, foot differential mode, and defroster mode, the door side wall outlet 63a is offset from the groove portion 92 of the case 10.

(Third embodiment)
In the second embodiment described above, only in the bi-level mode (or only in the foot mode, only in the foot differential mode), the door side wall 64 has the warm air in the groove 92 and the air flow in the outlet switching door 60. In the present embodiment, the warm air in the groove 92 and the air flow in the outlet switching door 60 are only used in two modes such as the bi-level mode and the foot mode. Heat exchange between the two is suppressed.

  FIG. 32 shows the configuration of the vehicle air conditioner of this embodiment. FIG. 32 is a sectional view of the air outlet switching door 60 and its surroundings in the vehicle air conditioner viewed from the vehicle width direction.

  In the present embodiment, the door right side wall 64 of the outlet switching door 60 is provided with only the door side wall outlet 63b among the door side wall outlets 63a and 63b shown in FIG. Although not shown, the door left side wall 63 of the outlet switching door 60 is provided with only the door side wall outlet 63b among the door side wall outlets 63a and 63b shown in FIG.

  The foot opening 16 side of the groove 92 of the right side wall 10 c of the case 10 is provided over the entire circumferential direction of the foot opening 16. Although not shown, the foot opening 16 side of the groove 92 of the left side wall 10 a of the case 10 is provided over the entire circumferential direction of the foot opening 16.

  32 shows the face mode, FIG. 33 shows the bi-level mode, FIG. 34 shows the foot mode, FIG. 35 shows the foot differential mode, and FIG. 36 shows the defroster mode.

  In the bi-level mode, the door side wall outlet 63b of the door side wall 64 communicates with the groove portion 92 of the right side wall 10c of the case 10, and the door side wall outlet 63b of the door left side wall 63 communicates with the groove portion 92 of the left side wall 10a of the case 10. doing.

  In the foot mode, the door side wall outlet 63b of the door side wall 64 communicates with the groove portion 92 of the right side wall 10c of the case 10, and the door side wall outlet 63b of the door side wall 63 communicates with the groove portion 92 of the left side wall 10a of the case 10. Yes.

  In the face mode, the foot differential mode, and the defroster mode, the door side wall outlet 63b of the door side wall 64 is offset from the groove portion 92 of the right side wall 10c of the case 10, and the door side wall outlet 63b of the door side wall 63 is the groove portion of the left side wall 10a of the case 10. Offset from 92.

  In the present embodiment described above, the door side wall outlet 63b of the door side wall 64 (63) communicates with the groove portion 92 of the side wall 10c (10a) of the case 10 only in the bi-level mode and the foot mode. Therefore, only in the bi-level mode and the foot mode, the door side wall 64 (63) isolates the warm air in the groove 92 and the air flow in the outlet switching door 60, and Heat exchange with the air flow in the outlet switching door 60 can be suppressed.

In the above-described embodiment, an example in which heat exchange between the warm air in the groove 92 and the air flow in the outlet switching door 60 is suppressed only in the case of two modes such as the bi-level mode and the foot mode. However, the present invention is not limited to this, and may be as follows.
(1) Only in the foot mode and the foot differential mode, heat exchange between the warm air in the groove 92 and the air flow in the outlet switching door 60 is suppressed.

  In this example, FIG. 37 shows the face mode, FIG. 38 shows the bi-level mode, FIG. 39 shows the foot mode, FIG. 40 shows the foot differential mode, and FIG. 41 shows the defroster mode.

  In the example shown in FIGS. 37 to 41, the door side wall 64 (63) of the outlet switching door 60 is provided with only the door side wall outlet 63a among the door side wall outlets 63a and 63b shown in FIG.

In the foot mode and the foot differential mode, the door side wall outlet 63a of the door side wall 64 (63) communicates with the groove portion 92 of the side wall 10c (10a) of the case 10. In the bilevel mode, the face mode, and the defroster mode, the door side wall outlet 63a of the door side wall 64 (63) is offset from the groove portion 92 of the side wall 10c (10a) of the case 10.
(2) Only in the bi-level mode and the foot differential mode, heat exchange between the warm air in the groove 92 and the air flow in the outlet switching door 60 is suppressed.

  In this example, FIG. 42 shows the face mode, FIG. 43 shows the bilevel mode, FIG. 44 shows the foot mode, FIG. 45 shows the foot differential mode, and FIG. 46 shows the defroster mode.

  In this example, as shown in FIGS. 42 to 46, both door side wall outlets 63 a and 63 b are provided on the door side wall 64 (63) of the outlet switching door 60. Of the groove portion 92 of the side wall 10c (10a) of the case 10, the foot opening portion 16 side is configured in a substantially Y shape that branches into two groove portions 94a and 94b. The groove 94a is located on the foot opening 16 side in the circumferential direction. The groove 94b is located on the opposite side of the foot opening 16 in the circumferential direction.

  In the bi-level mode, the door side wall outlet 63b of the door side wall 64 (63) communicates with the groove 94a of the side wall 10c (10a) of the case 10. In the foot differential mode, the door side wall outlets 63a and 63b of the door side wall 64 (63) communicate with the groove 94b of the side wall 10c (10a) of the case 10.

  In the face mode, foot mode, and defroster mode, the door side wall outlets 63a and 63b of the door side wall 64 (63) are offset from the groove portion 92 of the side wall 10c (10a) of the case 10.

(Fourth embodiment)
In the first embodiment described above, an example in which the hot air passage is configured by the groove portion 92 has been described. However, in the present embodiment, the cold air passage is configured by the groove portion 92.

  FIG. 47 shows the vehicle air conditioner of this embodiment. In the vehicle air conditioner of the present embodiment, a heating heat exchanger 50 is disposed on the rear side of the case 10 with respect to the cold air bypass passage 17.

  The air inlet 91 of the right side wall 10 c of the case 10 is disposed on the upper side of the cold air bypass passage 17 and on the front side with respect to the door right side wall 64. Although not shown, the air inlet 91 of the left side wall 10 a of the case 10 is disposed on the upper side of the cold air bypass passage 17 and on the front side of the door left side wall 63.

  In the present embodiment, the face opening 15, the defroster opening 14, and the foot opening 16 are clockwise (circumferential) around the axis of the rotation shafts 65 and 66 in the order of the openings 15, 14, and 16. In one direction).

  The foot opening 16 side of the groove 92 of the right side wall 10 c of the case 10 is provided over the entire circumferential direction of the foot opening 16. Although not shown, the foot opening 16 side of the groove 92 of the left side wall 10 a of the case 10 is provided over the entire circumferential direction of the foot opening 16.

  Next, the operation of this embodiment will be described.

  FIG. 47 shows the state of the face mode. In this face mode, the door opening 68 communicates with the face opening 15 and the cold air bypass passage 17 side, the door opening 67 communicates with the hot air outlet side of the heating heat exchanger 50, and the outer peripheral wall 61 opens. 14 and 16 are closed.

  At this time, in the outlet switching door 60, the hot air from the heating heat exchanger 50 that flows in through the door opening 67 and the cold air from the cold air bypass passage 17 that flows in through the door opening 68 are mixed. The mixed mixed air flows to the face outlet 71 through the door opening 68 and the face opening 15.

  Further, when the state of FIG. 48 is reached by the rotation of the outlet switching door 60, the bi-level mode is set. In this bi-level mode, the door opening 68 communicates with the face opening 15 and the cold air bypass passage 17 side, and the door opening 67 communicates with the hot air outlet side of the heating heat exchanger 50 and the foot opening 16. The outer peripheral wall 61 closes the openings 14 and 15, respectively.

  At this time, the mixed air in the outlet switching door 60 flows to the face outlet 71 through the door opening 68 and the face opening 15. Further, the mixed air in the outlet switching door 60 flows to the foot outlet 72 through the door opening 67 and the foot opening 16.

  In this bi-level mode, the door side wall outlets 63 a and 63 b of the door right side wall 64 communicate with the groove 92 of the right side wall 10 c of the case 10. For this reason, the cold air from the cold air bypass passage 17 flows out from the door side wall outlets 63a and 63b after passing through the air inlet 91 and the groove 92 of the right side wall 10c of the case 10. The cold air that has flowed out flows through the door opening 67 to the foot opening 16. Further, the door side wall outlets 63 a and 63 b of the door left side wall 63 communicate with the groove 92 of the left side wall 10 a of the case 10. For this reason, the cold air from the cold air bypass passage 17 flows to the foot opening 16 through the air inlet 91, the groove 92, the door side wall outlets 63 a and 63 b, and the door opening 67 of the left side wall 10 a of the case 10.

  In this way, the cool air flowing through the door side wall outlets 63 a and 63 b and the foot opening 16 and the mixed air from the outlet switching door 60 flow to the foot outlet 72.

  Further, when the state of FIG. 49 is reached by the rotation of the outlet switching door 60, the foot mode is set. In this foot mode, the outer peripheral wall 61 closes the face opening 15, the door opening 67 communicates with the foot opening 16, the door opening 67 slightly communicates with the defroster opening 14, and the door opening 68 is cold air bypass. The passage 17 side communicates with the hot air outlet side of the heating heat exchanger 50.

  At this time, the mixed air in the outlet switching door 60 flows through the door opening 67 and the foot opening 16 to the foot outlet 72.

  In this foot mode, the door side wall outlets 63 a and 63 b of the door right side wall 64 communicate with the groove 92 of the right side wall 10 c of the case 10. For this reason, the cold air from the cold air bypass passage 17 flows to the foot opening 16 through the air inlet 91, the groove 92, the door side wall outlets 63 a and 63 b, and the door opening 67 of the right side wall 10 c of the case 10. Further, the door side wall outlets 63 a and 63 b of the door left side wall 63 communicate with the groove 92 of the left side wall 10 a of the case 10. For this reason, the cold air from the cold air bypass passage 17 flows to the foot opening 16 through the air inlet 91, the groove 92, the door side wall outlets 63 a and 63 b, and the door opening 67 of the left side wall 10 a of the case 10.

  Further, when the state shown in FIG. In the foot differential mode, the outer peripheral walls 61 and 62 and the door openings 67 and 68 function in substantially the same manner as the above-described foot mode.

  In this case, the door side wall outlet 63 b of the door right side wall 64 communicates with the groove portion 92 of the right side wall 10 c of the case 10. For this reason, the cold air from the cold air bypass passage 17 flows out from the door side wall outlet 63b after passing through the air inlet 91 and the groove 92 of the right side wall 10c of the case 10. Further, the door side wall outlet 63 b of the door left side wall 63 communicates with the groove 92 of the left side wall 10 a of the case 10. For this reason, the cold air from the cold air bypass passage 17 flows out from the door side wall outlet 63b after passing through the air inlet 91 and the groove 92 of the left side wall 10a of the case 10.

  Here, the partition wall 100 is located between the openings 14 and 16 of the case 10 in the circumferential direction. For this reason, the cool air flowing out from the door side wall outlet 63 b of the door side wall 64 (63) is guided by the partition wall 100 and flows into the foot opening 16.

  Further, when the state of FIG. 51 is reached by the rotation of the outlet switching door 60, the defroster mode is set. In this defroster mode, the air mix door 55 opens the air passage on the heating heat exchanger 50 side in the case 10 and closes the air passage of the cold air bypass passage 17. The outer peripheral wall 61 closes the face opening 15, the outer peripheral wall 62 closes the foot opening 16, the door opening 67 communicates with the defroster opening 14, and the door opening 68 is the temperature of the heating heat exchanger 50. It communicates with the wind outlet side.

  According to the embodiment described above, in the bi-level mode, the foot mode, and the foot differential mode, when the cool air flows in the groove portion 92, the cold air in the groove portion 92 and the outlet switching door by the door side wall 64 (63). It is possible to suppress heat exchange between the cold air in the groove 92 and the air flow in the outlet switching door 60 by isolating the air flow in the 60. Therefore, it is possible to prevent the cold air temperature from rising when the cold air flows into the groove 92 (that is, the cold air passage). For this reason, it is possible to flow cold air having a sufficiently low temperature through the groove 92 to the foot opening 16.

  Here, as described above, the heating heat exchanger 50 is disposed on the rear side of the vehicle with respect to the cold air bypass passage 17. For this reason, compared with the above-mentioned 1st Embodiment, the warm air outlet of the heat exchanger 50 for a heating is located in the site | part close | similar to the foot opening part 16. As shown in FIG. Therefore, a lot of warm air flows into the foot opening 16 through the outlet switching door 60.

  Therefore, in the present embodiment, as described above, cold air having a sufficiently low temperature can be flowed into the foot opening 16 through the groove 92. Thereby, it can suppress that the blowing air temperature of the foot blowing outlet 72 becomes too high.

  In the present embodiment, in the foot differential mode, the partition wall 100 is disposed between the openings 14 and 15 in the circumferential direction around the axis of the rotation shafts 65 and 66. Therefore, the partition wall 100 guides the cool air from the door side wall outlet 63 b to the foot opening 16. For this reason, the warm air of the groove part 92 can be favorably flowed toward the foot opening part 16.

In the above-described embodiment, the door side wall 64 (63) is located between the cool air in the groove portion 92 and the air flow in the outlet switching door 60 in three blowing modes such as the bi-level mode, the foot mode, and the foot differential mode. Although the example which suppresses heat exchange was shown, it may replace with this and may be as follows.
(1) Only in the bi-level mode, the door side wall 63 suppresses heat exchange between the cold air in the groove 92 and the air flow in the outlet switching door 60. The structure of the blower outlet switching door 60 and the groove part 92 in this case is the same as the structure shown in FIGS.
(2) Only in the foot mode, heat exchange between the cold air in the groove 92 and the air flow in the outlet switching door 60 is suppressed. The structure of the outlet switching door 60 in this case is the same as the structure shown in FIGS.
(3) Only in the foot differential mode, heat exchange between the cold air in the groove 92 and the air flow in the outlet switching door 60 is suppressed. The structure of the blower outlet switching door 60 and the groove part 92 in this case is the same as the structure shown in FIGS.
(4) Only in the two modes such as the bi-level mode and the foot mode, the heat exchange between the cold air in the groove 92 and the air flow in the outlet switching door 60 is suppressed.
The structure of the blower outlet switching door 60 and the groove part 92 in this case is the same as the structure shown in FIGS.
(5) Only in the foot mode and the foot differential mode, heat exchange between the cold air in the groove 92 and the air flow in the outlet switching door 60 is suppressed. The structure of the blower outlet switching door 60 and the groove part 92 in this case is the same as the structure shown in FIGS.
(6) Only in the bi-level mode and the foot differential mode, heat exchange between the cold air in the groove 92 and the air flow in the outlet switching door 60 is suppressed. The structure of the blower outlet switching door 60 and the groove part 92 in this case is the same as the structure shown in FIGS.

  In the above-described fourth embodiment, an example in which the face opening 15, the defroster opening 14, and the foot opening 16 are arranged in the clockwise direction in the order of the openings 15, 14, 16 has been described. The defroster opening 14, the face opening 15, and the foot opening 16 may be arranged in the order of the openings 14, 15, 16 in the clockwise direction.

  In this case, as in the first embodiment described above, in the bi-level mode, the partition wall 100 is positioned between the openings 15 and 16 in the circumferential direction, and the hot air from the door side wall outlet 63b is supplied to the foot opening 16. To guide.

  In the above-described first embodiment, the example in which the defroster opening 14, the face opening 15, and the foot opening 16 are arranged in the clockwise direction in the order of the openings 14, 15, 16 has been described. The face opening 15, the defroster opening 14, and the foot opening 16 may be arranged in the clockwise direction in the order of the openings 15, 14, and 16.

  In this case, as in the above-described fourth embodiment, in the foot differential mode, the partition wall 100 is positioned between the openings 14 and 16 in the circumferential direction, and warm air from the door side wall outlet 63b is supplied to the foot opening 16. To guide.

In the above-described first to fourth embodiments, as the vehicle air conditioner 1, the example in which the heating heat exchanger 50 is disposed on the air downstream side of the cooling heat exchanger 30 has been described.
The heating heat exchanger 50 may be disposed on the air upstream side of the cooling heat exchanger 30.

  In the above-described first to fourth embodiments, the example in which the air flow from the inside of the groove portion 92 is caused to flow to the foot opening portion 16 is shown, but not limited to this, the defroster opening portion 14 other than the foot opening portion 16 is provided. Alternatively, an air flow from the inside of the groove 92 may be allowed to flow through the face opening 15.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 10 Case 10a Case inner surface 11 Outside air opening 12 Inside air opening 13 Drain outlet 14 Defroster opening 15 Face opening 16 Foot opening 19 Case inner surface 20 Inside / outside air switching door 25 Filter 30 Cooling Heat exchanger 40 Blow unit 50 Heating heat exchanger 55 Air mix door 60 Outlet switching door 61 Outer wall 62 Outer wall 63 Door left wall 64 Door right wall 65 Rotating shaft 66 Rotating shaft 90 Convex portion 91 Air inlet 92 Groove 92a Inclined part

Claims (7)

Inside the case (10) are a cooling heat exchanger (30), a heating heat exchanger (50), and an outlet switching door (60) that is arranged on the downstream side thereof and switches an outlet that blows out the conditioned air. In a vehicle air conditioner using a rotary door as the outlet switching door,
On the inner surface (18, 19) of the case, a groove portion (92) that constitutes a warm air passage through which the warm air from the heat exchanger for heating flows between the side walls (63, 64) of the rotary door. Is formed,
Side wall outlets (63a, 63b) are provided on the side walls of the rotary door, and when the rotary door is in a predetermined blowing mode for blowing conditioned air from two outlets, The vehicle air conditioner is characterized in that the hot air from the heating heat exchanger is taken into one of the two outlets through the groove and the door side wall outlet in communication with the groove. .   The case is provided with a convex portion (90) projecting outward, and the air inlet (91) for introducing the warm air from the heating heat exchanger and the groove portion are provided on the convex portion. The vehicle air conditioner according to claim 1, wherein the vehicle air conditioner is provided. Inside the case (10) are a cooling heat exchanger (30), a heating heat exchanger (50), and an outlet switching door (60) that is arranged on the downstream side thereof and switches an outlet that blows out the conditioned air. In a vehicle air conditioner using a rotary door as the outlet switching door,
On the inner surface (18, 19) of the case, there is formed a groove (92) that constitutes a cool air passage through which the cool air from the cooling heat exchanger flows, between the side walls (63, 64) of the rotary door. Has been
Side wall outlets (63a, 63b) are provided on the side walls of the rotary door, and when the rotary door is in a predetermined blowing mode for blowing conditioned air from two outlets, A vehicle air conditioner that communicates with the inside of the groove and that cool air from the cooling heat exchanger is taken into one of the two outlets through the groove and the door side wall outlet.   The case is provided with a convex portion (90) projecting outward, and an air inlet (91) for introducing cold air from the cooling heat exchanger and the groove portion are provided on the convex portion. The vehicle air conditioner according to claim 3. As the outlet, the defroster outlet (70), the face outlet (71), the foot outlet (72),
One of the two outlets is the foot outlet,
The predetermined air blowing mode for blowing air-conditioned air from the two air outlets is a bi-level mode in which air-conditioning air is blown from the face air outlet and the foot air outlet and / or air conditioning air is blown from the foot air outlet and the defroster air outlet. The vehicle air conditioner according to any one of claims 1 to 4, wherein the vehicle is in a foot differential mode. As the outlet, the defroster outlet (70), the face outlet (71), the foot outlet (72),
One of the two outlets is the foot outlet,
The predetermined blowing modes for blowing conditioned air from the two outlets include a bi-level mode for blowing conditioned air from the face outlet and the foot outlet, and a foot for blowing conditioned air from the foot outlet and the defroster outlet. Differential mode,
The door side wall is provided with first and second door side wall outlets (63a, 63b) as the door side wall outlet,
When in the foot differential mode, the first and second door side wall outlets communicate with the groove,
5. In the bilevel mode, the first door side wall outlet does not communicate with the groove, and the second door side wall outlet communicates with the groove. The vehicle air conditioner as described in one. A partition wall (100) is provided between the first door side wall outlet and the second door side wall outlet,
The vehicle air conditioner according to claim 6, wherein, in the bi-level mode, the partition wall guides air from the second door side wall outlet to the foot outlet.

Images