Patent Publication Number: US-2021178852-A1

Title: Air conditioner for vehicle

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     The present application claims priority to and the benefit of Korean Patent Application No. 10-2019-0166476, filed Dec. 13, 2019, the entire contents of which are incorporated herein by reference. 
     FIELD 
     The present disclosure relates to an air conditioner for a vehicle. 
     BACKGROUND 
     The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. 
     In general, a vehicle is equipped with an air conditioner that can control temperature of the interior for heating/cooling. Such an air conditioner includes an evaporator and a condenser and controls the temperature of air that is supplied into a vehicle. 
     In the related art, air conditioners usually employ a single zone control type that controls the interior of a vehicle at the same temperature or a dual zone control type that separately controls the temperature of a front seat zone and a rear seat zone by dividing the interior of a vehicle. 
       FIG. 1  is a cross-sectional view showing an air conditioner of the related art and  FIG. 2  is a view showing a flow path of air that is blown to rear seats through a heater. 
     As shown in  FIG. 1 , an air conditioner of the related art includes a casing  4  in which an evaporator  1 , a condenser  2 , and a heater  3  are disposed, and a front door  5  and a rear door  6  are installed on the casing  4 . Air with controlled temperature in the casing  4  is discharged to a front seat zone in a vehicle when the front door  5  is opened, and is discharged to a rear seat zone in the vehicle when the rear door  6  is opened. 
     We have discovered that such an air conditioner of the related art has a limitation that single zone control and a dual zone control can be applied, but triple zone control that is being recently studied cannot be applied. 
     In addition, we have found that since the rear door  6  is disposed over the heater  3  and a temp door  7  in the air conditioner, the air heated by the heater  3  is guided through an open entrance by the temp door  7 , is turned to an open inlet by the rear door  6 , and is then discharged to a rear vent  8  (see the arrow in  FIG. 2 ). A loss of flow rate is generated in the air discharged to the rear vent  8  due to the appropriate route described above, so there is a problem that the flow rate of air that is supplied to the rear seats is insufficient. 
     Further, the air conditioner has a separation wall  9  for discharging condensate water produced in the evaporator  1 , so there is a problem that the separation wall  9  decreases the space for air to flow after passing through the evaporator  1 . 
     SUMMARY 
     The present disclosure provides an air conditioner for a vehicle that can secure the flow rate of air that is supplied to a rear seat zone in a vehicle by improving the route for flow of air that is supplied to the rear seat zone. 
     An air conditioner for a vehicle according to an aspect of the present disclosure includes: a casing accommodating a cooler and a heater, where the cooler is configured to decrease a temperature of air discharged to an interior of a vehicle, and the heater is configured to increase the temperature of the air in the interior of the vehicle; a front temp door disposed in the casing and configured to control a temperature of air that is supplied to a front seat zone of the interior of the vehicle by controlling a flow rate of air flowing to the heater after passing through the cooler; a rear temp door disposed under the front temp door and configured to control a temperature of air that is supplied to a rear seat zone of the interior of the vehicle by controlling the flow rate of the air flowing to the heater after passing through the cooler; and a rear vent disposed at a lower portion of the casing under the cooler disposed ahead of the heater and configured to discharge air to the rear seat zone. The air conditioner has the following detailed characteristics. 
     In some forms of the present application, a rear door to open and close the rear vent may be disposed at a lower portion of the casing, and the rear door may be disposed under the cooler disposed ahead of the heater. 
     In one form, a front separation wall configured to inhibit or prevent the air that has passed through the cooler from flowing to the heater may be disposed between the cooler and the heater, and the front separation wall may have an inlet that is opened and closed by the rear temp door. 
     In another form, when the inlet of the front separation wall is opened by the rear temp door, the air that has passed through the cooler may flow to the heater through the inlet. 
     In other form, the rear temp door may inhibit or prevent the air that has passed through the cooler from flowing to the rear vent through a first channel disposed between a lower end of the cooler and a lower end of the heater by closing the first channel when the inlet of the front separation wall is opened. 
     In some forms of the present application, a second channel configured to guide air that has passed through the heater to the rear seat zone may be disposed under the heater, and the rear vent may be disposed at a downstream side of the first channel and the second channel. 
     In some forms of the present application, the front separation wall may be disposed ahead of the heater, a rear separation wall may be disposed behind the heater, and an upper portion of a heating space surrounded by the front separation wall and the rear separation wall may be opened and closed by a left front temp door and a right front temp door. 
     In some forms of the present application, the rear separation wall may have a baffle protruding toward the heater, and the baffle may guide air, which has passed through a lower portion of the heater after passing through an inlet of the front separation wall, to the second channel. 
     In some forms of the present application, a sub-rear temp door configured to inhibit or prevent air that has passed through the first channel from flowing backward to an upstream side of the second channel may be disposed in the second channel. In another form, the casing may have a condensate water collector disposed under the cooler, the condensate water collector may have a discharge port for discharging condensate water produced by the cooler, and a rear surface of the condensate water collector may bend upward behind the discharge port. The rear surface of the condensate water collector may be positioned under a lower end of the cooler. 
     In other form, a bottom surface of the casing disposed behind the condensate water collector and under the first channel may be inclined upward and rearward from a front. 
     In some forms of the present disclosure, a left outlet for discharging air to a left front seat zone and a left front door for opening and closing the left outlet may be disposed at an upper portion of a left casing part, and a flow rate of air that is blown to the left front seat zone may be controlled in accordance with the degree of opening of the left front door. 
     In some forms of the present disclosure, a right outlet for discharging air to a right front seat zone and a right front door for opening and closing the right outlet may be disposed at an upper portion of a right casing part, and a flow rate of air that is blown to the right front seat zone may be controlled in accordance with the degree of opening of the right front door. 
     In some forms of the present disclosure, the casing may be divided into a left casing part and a right casing part by a separator disposed at a center portion of the casing. In another form the front temp door may include: a left front temp door disposed in the left casing part and configured to control a temperature of air that is supplied to a left front seat zone of the interior of the vehicle by controlling a flow rate of the air flowing to the heater after passing through the cooler; and a right front temp door disposed in the right casing part and configured to control a temperature of air that is blown to a right front seat zone of the interior of the vehicle by controlling the flow rate of the air flowing to the heater after passing through the cooler. 
     According to the configuration described above, the air conditioner according to the present disclosure can achieve the following effects. 
     First, it is possible to increase the flow rate of air that is supplied to the rear seat zone in comparison to air conditioners of the related art by optimizing the flow path of the air that is discharged to the rear seat zone. 
     Second, it is possible to separately control temperature of the front zone and the rear zone by dividing the interior of the vehicle into the front zone and the rear zone. 
     Third, a blowing space for the air that has passed through the container is increased by reducing a separation wall structure for collecting and discharging condensate water, so the flow rate of air can be increased. 
     Further areas of applicability will become apparent from the description provided herein. It should be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure. 
    
    
     
       DRAWINGS 
       In order that the disclosure may be well understood, there will now be described various forms thereof, given by way of example, reference being made to the accompanying drawings, in which: 
         FIG. 1  is a view showing an air conditioner of the related art; 
         FIG. 2  is a view showing a flow path of air that is blown to a rear seat zone through a heater; 
         FIG. 3  is a perspective view showing an air conditioner according to one form of the present disclosure; 
         FIG. 4A  is a cross-sectional view taken along line A-A shown in  FIG. 3 ; 
         FIG. 4B  is a cross-sectional view taken along line B-B shown in  FIG. 3 ; 
         FIG. 5  is a cross-sectional view taken along line A′-A′ shown in  FIG. 3 ; 
         FIG. 6  is a view showing the casing when a left front temp door and a rear temp door are both operated in a closed mode; 
         FIG. 7  is a view showing the casing when the left front temp door and the rear temp door are both operated in an open mode; 
         FIG. 8  is a view showing the casing when the left front temp door is operated in the closed mode and the rear temp door is operated in the open mode; 
         FIG. 9  is a view showing the casing when the left front temp door is operated in the open mode and the rear temp door is operated in the closed mode; 
         FIG. 10  is a view showing the casing when the left front temp door and the rear temp door are both operated in an intermediate mode; and 
         FIG. 11  is a view showing a drain for discharging condensate water. 
     
    
    
     The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. 
     DETAILED DESCRIPTION 
     The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features. 
     It should be noted that directions such as ‘left’, ‘right’, ‘up’, and ‘down’ are defined on the basis of a vehicle equipped with an air conditioner. 
     An air conditioner of the present disclosure is configured to be able to secure a flow rate of air that is supplied to a rear seat zone of the interior of a vehicle by improving a route for flow of air that is supplied to the rear seat zone of the interior of the vehicle. Further, the air conditioner is configured to be able to separately control temperature for a front seat zone and a rear seat zone by dividing the interior of a vehicle and to separately control temperature for a left front seat zone, a right front seat zone, and a rear seat zone by dividing the interior of the vehicle. 
     The left front seat zone may be a driver seat zone and the right front seat zone may be a passenger seat zone. 
     As shown in  FIGS. 3 to 5 , the air conditioner includes a casing  100  having an internal space, and a cooler  102  and a heater  104  disposed in the internal space of the casing  100 . 
     Air that is blown by a blower can flow in the internal space of the casing  100 . The air blown by the blower can be decreased in temperature by the cooler  102  and can be increased in temperature by the heater  104 . The air can be discharged to the interior of the vehicle after passing through the cooler  102  or can be discharged to the interior after passing through the cooler  102  and the heater  104 . 
     The cooler  102  may be an evaporator that can decrease the temperature of air through heat exchange using a refrigerant and the heater  104  may be composed of a condenser  104   a  that can increase the temperature of air through heat exchange using a refrigerant and a PTC heater  104   b  that can heat air by receiving power. 
     The cooler  102  may be disposed in the front space of the internal space of the casing  100  and the heater  104  may be disposed in the rear space of the internal space of the casing  100 . That is, the cooler  102  may be disposed at a predetermined distance ahead of the heater  104 . The cooler  102  may be installed to be fixed in the front space of the casing  100 . The heater  104  may be installed to be fixed in the rear space of the casing  100  and a mount  106  to which the heater  104  is mounted and fixed may be disposed in the rear space of the casing  100 . The heater  104  may be disposed in a space (i.e., a heating space) surrounded by a front separation wall  108  and a rear separation wall  110  disposed in the rear space of the casing  100  when it is mounted on the mount  106 . 
     Referring to  FIGS. 3 and 5 , the casing  100  may be divided into two parts, a left casing part  114  and a right casing part  116 , by a separator  112  therebetween. 
     The separator  112  is disposed at the center portion in a left-right direction in the casing  100 , thereby being able to divide the rear space of the internal space of the casing  100  into two left and right parts. Accordingly, the left casing part  114  surrounds the left space in the internal space of the casing  100  and the right casing part  116  surrounds the right space in the internal space of the casing  100 . The left casing part  114  may be disposed ahead of the left front seat zone and the right casing part  116  may be disposed ahead of the right front seat zone. 
     The cooler  102  may be disposed throughout the internal space of the left casing part  114  and the internal space of the right casing part  116 . The heater  104  may also be disposed throughout the internal space of the left casing part  114  and the internal space of the right casing part  116 . 
       FIG. 4A  is a cross-sectional view taken along line A-A shown in  FIG. 3  and  FIG. 4B  is a cross-sectional view taken along line B-B shown in  FIG. 3 . Referring to  FIG. 4A , a left front temp door  118  is disposed in the left casing part  114 . Further, referring to  FIG. 4B , a right front temp door  120  is disposed in the right casing part  116 . 
     The left front temp door  118  can be mounted to be rotatable about a hinge  118   a  in the casing  100 . The hinge  118   a  is fixed to the separator  112  and the left casing part  114 , thereby being able to support rotation of the left front temp door  118 . That is, the left front temp door  118  can be rotatably supported by the separator  112  and the left casing part  114 . The left front temp door  118  can come in contact with the upper end of the front separation wall  108  and the upper end of the rear separation wall  110  when the degree of opening is 0 (zero). In other words, when the left front temp door  118  is operated in a closed mode, the front end and the rear end of the left front temp door  118  can come in contact with the upper end of the front separation wall  108  and the upper end of the rear separation wall  110 . 
     The right front temp door  120  can be mounted to be rotatable about a hinge  120   a  in the casing  100 . That is, the right front temp door  120  can be rotatably supported by the separator  112  and the right casing part  116 . The right front temp door  120  can come in contact with the upper end of the front separation wall  108  and the upper end of the rear separation wall  110  when the degree of opening is 0 (zero). That is, when the right front temp door  120  is operated in a closed mode, the front end and the rear end of the right front temp door  120  can come in contact with the upper end of the front separation wall  108  and the upper end of the rear separation wall  110 . 
     The front separation wall  108  may be disposed ahead of the heater  104  in the casing  100  and the rear separation wall  110  may be disposed behind the heater  104 . The front separation wall  108  and the rear separation wall  110  can form a heating space  122  by surrounding the heater  104  together with the left front temp door  118 , the right front temp door  120 , and the mount  106 . Accordingly, the upper portion of the heating space  122  can be opened/closed by the left front temp door  118  and the right front temp door  120 . Further, a channel is formed between the rear separation wall  110  and the lower portion of the mount  106 , so the heating space  122  can communicate with a second channel  126 . That is, the heating space  122  can be open such that the lower portion thereof can be connected with the second channel  126 . The second channel  126  is disposed at the lower portion of the casing  100 , it can guide air increased in temperature by the heater  104  to the rear vent  130 . The second channel  126  may extend under a first channel  124 . The rear vent  130  may be connected to the downstream sides of the first channel  124  and the second channel  126 . 
       FIG. 6  shows the casing when the left front temp door  118  and the rear temp door  140  are both operated in a closed mode.  FIG. 7  shows the casing when the left front temp door  118  and the rear temp door  140  are both operated in an open mode. The right front temp door  120  can be operated in the closed mode and the open mode in the same way as the left front temp door  118 . 
     Referring to  FIG. 7 , when the left front temp door  118  is operated in the open mode, air that has passed through the cooler  102  can flow into a left region of the heating space  122 . The air flowing in the heating space  122  can be heated through the left side of the heater  104 . 
     Similar to the left front temp door  118  shown in  FIG. 7 , the right front temp door  120  can be operated in the open mode. When the right front temp door  120  is operated in the open mode, air decreased in temperature through the cooler  102  can flow into a right region of the heating space  122 . The air flowing in the heating space  122  can be heated through the right side of the heater  104 . 
     The air that has flowed in the casing  100  and has passed through the cooler may be blown to the interior of the vehicle without passing through the heater  104  (see  FIG. 6 ) or may be discharged to the interior of the vehicle after passing through the heater  104  before being blown to the interior of the vehicle (see  FIG. 7 ). The air that has passed through the cooler  102  can be blown to the front seat zone through the third channel  12 , can pass through a third channel  128  and flow to the front seat zone when the left front temp door  118  is operated in the closed mode (see  FIG. 6 ). The right front temp door  120  can be operated in the closed mode in the same way as the left front temp door  118  shown in  FIG. 6 . The air that has passed through the cooler  102  can be blown to the heating space  122 , heated by the heater  104 , and then discharged to the interior of the vehicle when the left front temp door  118  is operated in the open mode (see  FIG. 7 ). 
     When the front temp doors  118  and  120  are operated in the open mode, the third channel  128  is closed and the upper portion of the heating space  122  is opened, so the air that has passed through the cooler  102  flows into the heating space  122 . The third channel  128  may be a channel between the upper portion of the cooler  102  and the heating space  122 . That is, the third channel  128  may be a channel positioned behind the upper portion of the cooler  102 . The third channel  128  may be divided into a 3-1 channel at the left side (see  128  in  FIG. 4A ) and a 3-2 channel at the right side (see  128  in  FIG. 4B ) with the separator  112  therebetween. 
     When the front temp doors  118  and  120  are operated in the open mode, the front ends and the rear ends of the front temp doors  118  and  120  can come in contact with a supporting protrusion  134  and the upper portion of the mount  106 , respectively. The supporting protrusion  134  protrudes from the inner side of the casing  100  and may be disposed behind the upper portion of the cooler  102 . 
       FIG. 8  shows the casing when the left front temp door  118  is operated in the closed mode and the rear temp door  140  is operated in the open mode.  FIG. 9  shows the casing when the left front temp door  118  is operated in the open mode and the rear temp door  140  is operated in the closed mode. 
       FIG. 10  shows the casing when the left front temp door  118  and the rear temp door  140  are both operated in an intermediate mode. The right front temp door  120  can be operated in the intermediate mode in the same way as the left front temp door  118 . 
     As shown in  FIG. 10 , when the left front temp door  118  is operated in the intermediate mode in which it is positioned between the position of the closed mode and the position of the open mode, that is, when the degree of opening of the left front temp door  118  is larger than 0% and smaller than 100%, some (i.e., first air) of the air that has passed through the cooler  102  can flow to a left front door  152  without passing through the heater  104 , and the other (i.e., second air) of the air that has passed through the cooler  102  can flow to the left front door  152  after passing through the heater  104 . The first air and the second air can be mixed in the casing  100  before they are discharged to the interior of the vehicle through the left front door  152 . That is, the first air and the second air can be discharged to the interior of the vehicle after mixed together in the casing  100  (i.e., in a front mixing zone). The front mixing zone may be a space positioned at an upstream side of the front doors  152  and  154 . 
     Since the operations of the left front temp door  118  and the right front temp door  120  are controlled in the way described above, it is possible to control the flow rate of the air that is blown to the heater  104  after passing through the cooler  102 , and accordingly, it is possible to separately control the temperatures of the air that is discharged to the left front seat zone and the right front seat zone of the interior of the vehicle. To this end, the left front temp door  118  and the right front temp door  120  can be individually controlled. The temperature of the air that is blown to the left front seat zone can be controlled in accordance with the degree of opening of the left front temp door  118 , and the temperature of the air that is blown to the right front seat zone can be controlled in accordance with the degree of opening of the right front temp door  120 . 
     Referring to  FIGS. 4A and 4B , the front separation wall  108  is disposed between the cooler  102  and the heater  104  to be able to inhibit or prevent the air that has passed through the cooler  102  from flowing to the heater  104 . An inlet  108   a  through which the air that has passed through the cooler  102  can flow inside may be formed under the front separation wall  108 , and rear temp door  140  that opens/closes the inlet  108   a  may be disposed. As shown in  FIGS. 7 and 8 , when the inlet  108   a  is opened by the rear temp door  140 , the air that has passed through the cooler  102  can flow to the heater  104  through the inlet  108   a . The rear temp door  140  can be rotatably supported at the lower portion of the casing  100 . 
     The rear temp door  140  may be disposed with a predetermined gap under the front temp doors  118  and  120 . The rear temp door  140  closes the inlet  108   a  of the front separation wall  108  when it is operated in the closed mode, and opens the inlet of the front separation wall  108  when it is operated in the open mode. As shown in  FIG. 6 , when the inlet  108   a  of the front separation wall  108  is closed, the air that has passed through the cooler  102  can be blown to the rear vent  130  through the first channel  124 . As shown in  FIG. 7 , when the inlet  108   a  of the front separation wall  108  is open, the air that has passed through the cooler  102  can be blown to the heater  104  through the inlet  108   a . The air blown to the heater  104  can be increased in temperature by the heater  104  and then can be blown to the rear vent  130  through the second channel  126 . 
     The rear temp door  140  can inhibit or prevent the air that has passed through the cooler  102  from flowing to the rear vent  130  through the first channel  124  disposed between the lower end of the cooler  102  and the lower end of the heater  104  by closing the first channel  124  when opening the inlet  108   a  of the front separation wall  108 . Further, the rear temp door  140  allows the air that has passed through the cooler  102  to flow to the rear vent  130  through the first channel  124  by opening the first channel  124  when closing the inlet of the front separation wall  108 . 
     Further, when the rear temp door  140  is operated in the intermediate mode in which it is positioned between the position of the closed mode and the position of the open mode, that is, when the degree of opening of the rear temp door  140  is larger than 0% and smaller than 100%, as shown in  FIG. 10 , some (i.e., third air) of the air that has passed through the cooler  102  can flow to the rear vent  130  without passing through the heater  104 , and the other (i.e., fourth air) of the air that has passed through the cooler  102  can flow to the rear vent  130  through the second channel  126  after passing through the heater  104 . 
     The third air and the fourth air can be mixed in the casing  100  before they are discharged to the interior of the vehicle through the rear vent  130 . That is, the third air and the fourth air can be discharged to the interior of the vehicle after mixed in the casing  100  (i.e., in a rear mixing zone). The rear mixing zone may be a space positioned at an upstream side of the rear vent  130 . 
     Since the operation of the rear temp door  140  is controlled in the way described above, it is possible to control the flow rate of air that is blown to the heater  104  after passing through the cooler  102 , and accordingly, it is possible to control the temperature of the air that is discharged to the rear seat zone of the interior of the vehicle. It is also possible to control the temperature of the air that is blown to the rear seat zone in accordance with the degree of opening of the rear temp door  140 . 
     As shown in  FIGS. 4A and 4B , the rear vent  130  for discharge air to the rear seat zone and a rear door  138  that opens/closes the rear vent  130  may be disposed at rear portion in the casing  100 . The rear vent  130  may be disposed at the lower portion of the casing  100  to be positioned under the cooler  102  and the rear door  138  may be disposed in the rear vent  130  (i.e., a channel) to open/close the internal channel of the rear vent  130 . 
     When the rear door  138  is operated in the closed mode, the air flowing to the rear vent  130  cannot be discharged to the rear seat zone. When the rear door  138  is operated in the open mode, the air flowing to the rear vent  130  can be discharged to the rear seat zone. For example, the air flowing to the rear vent  130  can be blown to the rear seat zone through a separate duct connected to the rear vent  130  outside the casing  100 . 
     The flow rate of the air discharged from the rear vent  130  when the rear door  138  is operated in the intermediate mode, can be smaller than the flow rate of the air discharged from the rear vent  130  when the rear door  138  is operated in open mode. In other words, the flow rate of the air that is blown to the rear seat zone through the rear vent  130  can be controlled in accordance with the degree of opening of the rear door  138 . 
     Further, the rear separation wall  110  may have a baffle  144 . The baffle  144  may protrude from the front surface of the rear separation wall  110  toward the heater  104 . The baffle  144  may extend up to the rear surface of the heater  104 . As such, the baffle  144  may define an upper portion and a lower portion of the rear region of the heating space  122 . The baffle  144  can guide the air that has passed through the inlet  108   a  of the front separation wall  108  to the second channel  126  through the lower portion of the heater  104 . In other words, the baffle  144  can guide the air that has passed through the lower portion of the heater  104  to the second channel  126  by preventing the air from flowing to the upper portion of the heating space  122 , whereby a flow rate of the air that is blown to the rear seat zone can be secured. 
     Further, a sub-rear temp door  142  may be disposed in the second channel  126 . The sub-rear temp door  142  may be disposed in the casing  100  to be positioned under the front separation wall  108  and the mount  106 . The sub-rear temp door  142  can rotate such that the lower portion thereof comes in contact with the bottom of the mount  106  when it is operated in the open mode. The sub-rear temp door  142  can open the second channel  126  when it is operated in the open mode. The sub-rear temp door  142  can rotate such that the lower portion thereof comes in contact with the bottom surface of the casing  100  when it is operated in the closed mode. The sub-rear temp door  142  can close the second channel  126  when it is operated in the closed mode. When sub-rear temp door  142  is operated in the closed mode, the air flowing to the rear vent  130  through the first channel  124  can be prevented from flowing backward to the upstream side of the second channel  126 . That is, when sub-rear temp door  142  is operated in the closed mode, the air flowing to the rear vent  130  through the first channel  124  can be prevented from flowing backward to the opposite side to the rear vent  130  and the rear space in the casing  100 . The sub-rear temp door  142  can guide the air flowing through the first channel  124  to the rear vent  130  when it is operated in the closed mode. 
     Further, a condensate water collector  146  that collects condensate water produced by the cooler  102  may be disposed at the lower portion of the casing  100 . The condensate water collector  146  may be disposed under the cooler  102  and over the rear vent  130 . The condensate water collector  146  may have one or more discharge ports  148  for discharge the condensate water out of the casing  100 . A rear side  146   a  of the condensate water collector  146  bends upward behind the discharge port  148 , thereby being able to prevent the condensate water from overflowing out of the condensate water collector  146 . The rear side  146   a  may be positioned lower than the lower end of the cooler  102  in the up-down direction of the vehicle. That is, the rear side  146   a  may be positioned under the lower end of the cooler  102 . Referring to  FIG. 11 , when the condensate water collector  146  has two or more discharge ports  148 , the discharge port  148  may be arranged left and right in the lower portion of the casing  100 . 
     Referring to  FIGS. 4A and 11 , the discharge port  148  may be disposed in the rear vent  130 , and a drain  150  for discharging condensate water out of the rear vent  130  may be disposed at a side of the rear vent  130 . Condensate water can be discharged out of the vehicle through a drain hose, etc. connected to the drain  150 . 
     The bottom surface  100   a  of the casing  100  surrounding the lower portion of the second channel  126  may be inclined upward and rearward from the front. In other words, the bottom surface  100   a  of the casing  100  disposed behind the condensate water collector  146  and under the first channel  124  may be inclined upward and rearward from the front. Accordingly, even if condensate water produced by the cooler  102  overflows the rear surface  146   a  of the condensate water collector  146  toward the second channel  126 , the condensate water flows to the rear vent  130  by gravity, so it can be discharged to the drain  150 . 
     Meanwhile, referring to  FIGS. 4A and 4B , a left outlet  114   a  for sending air to the left front seat zone and a left front door  152  for opening/closing the left outlet  114   a  may be disposed at the upper portion of the left casing part  114 . The left front door  152  can be rotated by an actuator and the flow rate of the air that is blown to the left front seat zone can be controlled in accordance with the degree of opening of the left front door  152 . 
     Further, a right outlet  116   a  for discharging air to the right front seat zone and a right front door  154  for opening/closing the right outlet  116   a  may be disposed at the upper portion of the right casing part  116 . The right front door  154  can be rotated by an actuator and the flow rate of the air that is blown to the right front seat zone can be controlled in accordance with the degree of opening of the right front door  154 . 
     Further, other doors stated herein can also be rotated by actuators and the actuators for the doors can be individually controlled. Further, all of the doors stated herein can be rotatably supplied on the casing  100 . 
     A first side door  156  may be disposed in the left casing part  114 . The first side door  156  can form a left closed space  160  in the left casing part  114 . The left closed space  160  can be closed by the rear surface and the sides of the left casing part  114 , the rear separation wall  110 , the separator  112 , and the first side door  156 . When the first side door  156  is operated in the open mode, the upper portion of the left closed space  160  can be opened. The air flowing in the left closed space can be discharged to the left front seat zone through a left front vent  164 . The left front vent  164  may protrude from the outer surface of the left casing part  114 . 
     Further, a second side door  158  may be disposed in the right casing part  116 . The second side door  158  can form a right closed space  160  in the right casing part  116 . The right closed space  162  can be closed by the rear surface and the sides of the right casing part  116 , the rear separation wall  110 , the separator  112 , and the second side door  158 . When the second side door  158  is operated in the open mode, the upper portion of the right closed space  162  can be opened. The air flowing in the right closed space  162  can be discharged to the right front seat zone through a right front vent  168 . The right front vent  168  may protrude from the outer surface of the right casing part  116 . 
     Although forms of the present disclosure were described above, the scope of the present disclosure is not limited to the forms, and various changes and modifications by those skilled in the art using the spirit of the present disclosure are also included in the scope of the present disclosure.