Vehicle air conditioner

Abstract

Disclosed is a vehicle air conditioner capable of alleviating a temperature difference caused by the distance between a side vent and a center vent that becomes greater when a center vent outlet is inevitably moved downward due to spatial limitations arising from the application of a large roll screen to a vehicle. The vehicle air conditioner comprises: an air-conditioning case having a center vent for discharging the air toward the center of the vehicle in the width direction, a side vent for discharging the air toward the side, and a floor vent for discharging the air toward the feet; a cooling heat-exchanger provided in the air-conditioning case so as to cool the air; and a heating heat-exchanger provided in the air-conditioning case so as to heat the air, wherein the side vent and the center vent are separated in the front-rear direction of the vehicle, and the air conditioner includes: a first mode door for controlling the amount of air discharged to the side vent, the center vent and the floor vent; and a second mode door for controlling the amount of air discharged to the center vent and the floor vent.

Description

Vehicle air conditioning system

[0001] The present invention relates to a vehicle air conditioning system, and more specifically, to a vehicle air conditioning system having a structure in which side vents and a center vent are arranged side by side in the front-rear direction of the vehicle.

[0002] Generally, a vehicle air conditioning system is an interior component of a vehicle installed for the purpose of cooling or heating the vehicle's interior during the summer or winter, or removing frost that forms on the windshield during rain or winter, so that the driver can maintain a clear view of the front and rear. The air conditioning system is typically equipped with both a heating system and a cooling system, and selectively introduces outside or inside air to heat or cool the air and then blows it into the vehicle's interior to cool, heat, or ventilate the vehicle's interior.

[0003] Referring to FIG. 1, a conventional vehicle air conditioning system comprises an air conditioning case (10), an evaporator (11) and a heater core (12), a front seat temperature control door (14), a rear seat temperature control door (13), and a plurality of mode doors.

[0004] The air conditioning case (10) is equipped with an air inlet and an air outlet, and an air passage is formed inside. A blower is connected to the air inlet side so that internal or external air is selectively introduced into the air passage inside the air conditioning case (10). In addition, the air outlet is composed of a defrost vent (15), a side vent (16), a center vent (26), a floor vent (17), a console vent (19), and a rear floor vent (18).

[0005] The internal air passage of the air conditioning case (10) consists of a front seat cold air passage, a hot air passage, and a rear seat cold air passage. The front seat cold air passage, the hot air passage, and the rear seat cold air passage are formed sequentially from top to bottom. The evaporator (11) is a heat exchanger for cooling that cools the air passing through it, and the heater core (12) is a heat exchanger for heating that heats the air passing through it. The heater core (12) is positioned in the hot air passage, which is downstream of the evaporator (11), in the direction of air flow. An electric heater (27), such as a PTC heater, is further provided in the hot air passage.

[0006] The front seat temperature control door (14) is positioned between the evaporator (11) and the heater core (12) to control the opening of the hot air passage passing through the heater core (12) and the cold air passage bypassing the heater core (12). A plurality of mode doors are provided with a defrost door (20) that controls the opening of the defrost vent (15), a vent door (21) that controls the opening of the side vent (16) and center vent (26), a floor door (22) that controls the opening of the floor vent (17), and a rear seat mode door (25) that controls the opening of the console vent (19) and rear seat floor vent (18).

[0007] The rear seat temperature control door (13) is provided between the evaporator (11) and the heater core (12) to control the opening of the hot air passage and the rear seat cold air passage. Meanwhile, the rear seat auxiliary temperature control door (24) and the rear seat on / off door (23) are provided within the air conditioning case (10). The rear seat auxiliary temperature control door (24) is positioned on the downstream side of the heater core (12) in the direction of air flow to control the opening of the passage flowing to the rear seat air outlet. In addition, the rear seat on / off door (23) controls the opening of the rear seat cold air passage.

[0008] Meanwhile, in a conventional vehicle air conditioning system, a screen (30), which is a display device, is installed on the front panel. A defrost duct (31) is connected to the defrost vent (15) and configured to discharge air toward the vehicle window. Additionally, a side duct is connected to the side vent (16) and configured to discharge air toward both sides in the width direction of the vehicle. Furthermore, a center duct (32) is connected to the center vent (26) and configured to discharge air toward the center of the vehicle. In this case, the discharge port of the center duct (32) connected to the center vent (26) is positioned at the bottom of the screen (30).

[0009] Recently, there has been a trend toward larger display devices installed in vehicles, and large screens are configured to be rollable. Referring further to FIG. 2, the large screen roll screen (40) is rolled up in the rolling section (41) and configured to be pulled out upward as needed. In this way, when the large screen roll screen (40) is applied to a vehicle, interference with the air conditioning system is inevitable due to the volume of the rolling section (41).

[0010] Ultimately, due to the large screen roll screen (40), the discharge port of the center duct (32) connected to the center vent (26) must be modified to the lower position, which causes a problem of overlap with the discharge port of the floor vent (17). In addition, it is impossible to configure the assembly path of the center duct (32), and it is difficult or impossible to secure the position of the discharge port of the floor vent (17). Even if the center vent (26) is configured to the lower part of the large screen roll screen (40), a problem occurs where the distance between the center vent (26) and the side vent (16) widens, causing a large temperature difference.

[0011] To solve the aforementioned conventional problems, the present invention provides a vehicle air conditioning system capable of improving the temperature difference caused by the distance between the side vent and the center vent when a large roll screen is applied to the vehicle and the center vent outlet must inevitably be moved downward due to space constraints.

[0012] A vehicle air conditioning system according to the present invention comprises: an air conditioning case formed with a center vent for discharging air toward the center in the width direction of the vehicle, a side vent for discharging air toward the side, and a floor vent for discharging air toward the feet; a cooling heat exchanger provided in the air conditioning case for cooling the air; and a heating heat exchanger provided in the air conditioning case for heating the air, wherein the side vent and the center vent are configured to be separated in the front-rear direction of the vehicle, and a first mode door for controlling the amount of air discharged through the side vent, the center vent, and the floor vent; and a second mode door for controlling the amount of air discharged through the center vent and the floor vent.

[0013] The above air conditioning case is provided with a cold air passage that passes through a cooling heat exchanger and bypasses a heating heat exchanger, and a hot air passage that passes through the heating heat exchanger, and is provided with a first passage downstream of the cold air passage and the hot air passage in the direction of air flow, and the first passage is branched into a side vent, a center vent, or a floor vent.

[0014] A second flow path is provided downstream of the first flow path in the direction of air flow, and the second flow path branches into a center vent or a floor vent.

[0015] The discharge inlet of the side vent opens upward, and the discharge inlet of the center vent opens towards the rear of the vehicle.

[0016] The branch of the second Euro leading to the floor vent is positioned lower than the branch leading to the center vent.

[0017] The above-mentioned first mode door is provided at the inlet of the first flow path and controls the amount of air flowing into the first flow path.

[0018] A side door is provided to control the amount of air discharged to the side vent downstream of the first mode door in the direction of air flow.

[0019] The above-mentioned second mode door is provided at the branching point of the second Euro and controls the amount of air discharged to the center vent and the amount of air discharged to the floor vent.

[0020] A structure including a vehicle screen is provided between the side vent and the center vent, and the side vent and the center vent are spaced apart with the structure in between.

[0021] The above-mentioned first mode door is equipped with a constant discharge hole to allow air to be discharged at all times when the Euro is closed.

[0022] The above-mentioned side door is equipped with a constant discharge hole to allow air to be discharged at all times when the Euro is closed.

[0023] In vent mode, the first mode door is controlled to open the first flow path, the side door to open the side vent, and the second mode door to open the center vent in the second flow path.

[0024] In floor mode, the first mode door opens the first flow path, the side door closes the side vent, and the second mode door is controlled to open the floor vent in the second flow path.

[0025] In bi-level mode, the first mode door opens the first flow path, the side door opens the side vent, and the second mode door is controlled to open the center vent and floor vent in the second flow path.

[0026] A defrost vent for discharging air toward the vehicle window and a defrost door for controlling the amount of air discharged through the defrost vent are provided, and in defrost mode, the defrost door opens the defrost vent, the first mode door closes the first air passage, the side door closes the side vent, and a portion of the air discharged through the defrost vent is discharged to the side vent through a normal discharge hole formed in the first mode door and the side door.

[0027] The vehicle air conditioning system according to the present invention can reduce the temperature difference between the side vents and the center vents and improve temperature performance. In addition, since the temperature difference problem can be resolved through the first air passage, the second air passage, the first mode door, and the second mode door even when the side vents and the center vents are separated by a large distance, the space between the side vents and the center vents can be sufficiently large, allowing it to be applied to vehicles equipped with a large screen of a rolling structure.

[0028] FIG. 1 is a side cross-sectional view illustrating a conventional vehicle air conditioning system, and

[0029] FIG. 2 is a side cross-sectional view illustrating a vehicle air conditioning system with a conventional large-screen roller screen, and

[0030] FIG. 3 is a side cross-sectional view illustrating a vehicle air conditioning system according to one embodiment of the present invention, and

[0031] FIG. 4 is a side cross-sectional view showing an enlarged portion of FIG. 3, and

[0032] FIG. 5 is a plan view illustrating a side door according to an embodiment of the present invention, and

[0033] FIG. 6 is a plan view illustrating a first mode door according to an embodiment of the present invention, and

[0034] FIG. 7 illustrates a vent mode of a vehicle air conditioning system according to one embodiment of the present invention, and

[0035] FIG. 8 illustrates a floor mode of a vehicle air conditioning system according to one embodiment of the present invention, and

[0036] FIG. 9 illustrates a bi-level mode of a vehicle air conditioning system according to one embodiment of the present invention, and

[0037] FIG. 10 illustrates a differential mode of a vehicle air conditioning system according to one embodiment of the present invention.

[0038] The technical configuration of the vehicle air conditioning system is described in detail below in accordance with the attached drawings.

[0039] Referring to FIGS. 3 to 6, a vehicle air conditioning system according to one embodiment of the present invention comprises an air conditioning case (110), an evaporator (111) and a heater core (112), a front seat temperature control door (114), a rear seat temperature control door (113), and a plurality of mode doors. In the following description, the left side of FIG. 4 is the front direction of the vehicle, the right side is the rear direction, and the direction protruding in the drawing is the width direction of the vehicle.

[0040] The air conditioning case (110) is equipped with an air inlet and a plurality of air outlets, and an air passage is formed inside. A blower is connected to the air inlet side so that internal or external air is selectively introduced into the air passage inside the air conditioning case (110). In addition, the air outlets are composed of a defrost vent (115), a side vent (116), a center vent (126), a floor vent (117), a console vent (119), and a rear floor vent (118).

[0041] The defrost vent (115) is for discharging air toward the vehicle window. The side vent (116) is for discharging air toward the center of the vehicle width, and the center vent (126) is for discharging air toward the side of the vehicle width. The floor vent (117) is for discharging air toward the feet, the console vent (119) is for discharging air toward the face of the rear seat of the vehicle, and the rear floor vent (118) is for discharging air toward the feet of the rear seat of the vehicle.

[0042] The air passage inside the air conditioning case (110) consists of a front seat cold air passage, a hot air passage, and a rear seat cold air passage. The front seat cold air passage, the hot air passage, and the rear seat cold air passage are formed sequentially from top to bottom. The evaporator (111) is a heat exchanger for cooling that cools the air passing through it, and the heater core (112) is a heat exchanger for heating that heats the air passing through it. The heater core (112) is positioned in the hot air passage, which is downstream of the evaporator (111), in the direction of air flow. An electric heater (127), such as a PTC heater, is further provided in the hot air passage.

[0043] The front seat temperature control door (114) is positioned between the evaporator (111) and the heater core (112). The front seat temperature control door (114) controls the opening of the hot air passage passing through the heater core (112) and the cold air passage (front seat cold air passage) passing through the evaporator (111) and bypassing the heater core (112). A plurality of mode doors are provided with a defrost door (120) that controls the amount of air discharged from the defrost vent (115) by controlling the opening of the defrost vent (115), and a rear seat mode door (125) that controls the opening of the console vent (119) and the rear seat floor vent (118).

[0044] The rear seat temperature control door (113) is provided between the evaporator (111) and the heater core (112) to control the opening of the hot air passage and the rear seat cold air passage. Meanwhile, the rear seat auxiliary temperature control door (124) and the rear seat on / off door (123) are provided within the air conditioning case (110). The rear seat auxiliary temperature control door (124) is positioned on the downstream side of the heater core (112) in the direction of air flow to control the opening of the passage flowing to the rear seat air outlet. In addition, the rear seat on / off door (123) controls the opening of the rear seat cold air passage.

[0045] The side vent (116) and the center vent (126) are configured to be separated in the front-to-rear direction of the vehicle. The discharge opening of the side vent (116) is opened toward the top. And, the discharge opening of the center vent (126) is opened toward the rear of the vehicle. Meanwhile, a structure is installed on the front panel of the vehicle. In this case, the structure includes a large screen which is a display device. The large screen is configured to be rollable so as to provide the largest possible display area within a constrained space.

[0046] The large screen is equipped with a roll screen (140) and a rolling section (141). The roll screen (140) is rolled up on the rolling section (141) and configured to be pulled out upward as needed. In this way, when the large screen is applied to a vehicle, interference with the air conditioning system is inevitable due to the volume of the rolling section (141). The rolling section (141) of the large screen is provided between the side vent (116) and the center vent (126). That is, the side vent (116) and the center vent (126) are spaced apart with the large screen in between.

[0047] Due to the large screen, the location of the discharge port of the center duct (132) connected to the center vent (126) must be adjusted downward, so there is a problem of overlap between the center duct (132) and the floor vent (117) discharge port. In addition, it is impossible to configure the assembly path of the center duct (132), and it is difficult or impossible to secure the location of the floor vent (117) discharge port. Furthermore, if the center vent (126) is configured to the lower part of the large screen, the distance between the center vent (126) and the side vent (116) widens, inevitably causing a problem where the temperature difference increases.

[0048] To solve these problems, a vehicle air conditioning system according to one embodiment of the present invention comprises a first mode door (160), a second mode door (122), a first flow path (150), and a second flow path (151).

[0049] The first mode door (160) controls the amount of air discharged to the side vent (116), center vent (126), and floor vent (117). The first mode door (160) is of the flat type and rotates around a rotation axis to control the amount of air directed toward the first flow path (150). The second mode door (122) controls the amount of air discharged to the center vent (126) and floor vent (117). The second mode door (160) is of the dome type and rotates around a rotation axis to control the amount of air directed toward the center vent (126) and floor vent (117) from the second flow path (151).

[0050] The first flow path (150) is formed downstream of the cold air flow path and the hot air flow path in the direction of air flow. The first flow path (150) branches off to the side vent (116) or to the center vent (126) or the floor vent (117). That is, air flowing into the first flow path (150) moves to the side vent (116) or to the second flow path (151). The second flow path (151) is formed downstream of the first flow path (150) in the direction of air flow. The second flow path (151) is a flow path that branches off to the center vent (126) or to the floor vent (117).

[0051] Meanwhile, the branch of the second flow path (151) leading to the floor vent (117) is positioned lower than the branch leading to the center vent (126). That is, the center vent (126) extends approximately horizontally from the branch of the second flow path (151) toward the rear of the vehicle and is connected to a center duct (132) at its end to discharge air toward the rear of the vehicle. The floor vent (117) extends approximately vertically downward from the branch of the second flow path (151) and is configured to discharge air toward the occupant's feet through a floor duct connected to a discharge port formed on both sides of the air conditioning case (110) in the width direction of the vehicle.

[0052] A first mode door (160) is provided at the inlet of the first flow path (150) to control the amount of air flowing into the first flow path (150). Additionally, a side door (121) is provided downstream of the first mode door (160) in the direction of air flow. The side door (121) is provided at the side vent (116) to control the amount of air discharged to the side vent (116). A second mode door (122) is provided at the branching point of the second flow path (151) to control the amount of air discharged to the center vent (126) and the amount of air discharged to the floor vent (117).

[0053] Cold air passing through the evaporator (111) and bypassing the heater core (112), or warm air passing through the evaporator (111) and passing through the heater core (112), or a mixture of cold and warm air, opens and closes the inlet of the first flow path (150) according to the rotational operation of the first mode door (160). The amount of air flowing into the first flow path (150) can be controlled according to the opening amount of the first mode door (160). The air flowing into the first flow path (150) can be selectively moved to two flow paths.

[0054] That is, air introduced into the first Euro (150) moves upward according to the rotation angle of the side door (121) and is discharged to the side vent (116), or moves to the rear lower and moves backward according to the rotation angle of the second mode door (122) and is discharged to the center vent (126), or moves downward and is discharged to the floor vent (117).

[0055] Meanwhile, a constant discharge hole (1601) is formed in the first mode door (160). The first mode door (160) is provided with a rotation axis (1602) and a body part (1603) extending from the rotation axis (1602). The constant discharge hole (1601) is formed to penetrate the body part (1603) so that air can be discharged constantly when the first mode door (160) closes the flow path. That is, when the first mode door (160) is at an angle that completely closes the entrance of the first flow path (150), some air can flow into the first flow path (150) through the constant discharge hole (1601).

[0056] Additionally, a constant discharge hole (1211) is formed in the side door (121). The side door (121) is provided with a rotation axis (1212) and a body part (1213) extending from the rotation axis (1212). The constant discharge hole (1211) is formed to penetrate the body part (1213) so that air can be discharged constantly when the side door (121) closes the air passage. That is, when the side door (121) is at an angle that completely closes the side vent (116), some of the air can be discharged to the side vent (116) through the constant discharge hole (1211).

[0057] Referring further to FIG. 7, in vent mode, the first mode door (160) opens the first air passage (150), and the side door (121) opens the side vent (116). The second mode door (122) is controlled to open the center vent (126) in the second air passage (151). The front seat temperature control door (114) closes the hot air passage, so that cold air passing through the evaporator (111) flows into the first air passage (150). Some of the air flowing into the first air passage (150) is discharged to the side vent (116), and other parts are discharged to the center vent (126).

[0058] Referring further to FIG. 8, in floor mode, the first mode door (160) opens the first flow path (150), and the side door (121) closes the side vent (116). The second mode door (122) is controlled to open the floor vent (117) in the second flow path (151). The front seat temperature control door (114) opens the hot air flow path, and the hot air that has passed through the evaporator (111), the heater core (112), and the electric heater (127) flows into the first flow path (150). The air flowing into the first flow path (150) moves to the second flow path (151) and is discharged through the floor vent (117).

[0059] Referring further to FIG. 9, in bi-level mode, the first mode door (160) opens the first flow path (150), and the side door (121) opens the side vent (116). The second mode door (122) is controlled to open both the center vent (126) and the floor vent (117) in the second flow path (151). The front seat temperature control door (114) opens the cold air flow path and the hot air flow path, so that cold air passing through the evaporator (111) and bypassing the heater core (112), and hot air passing through the evaporator (111), the heater core (112), and the electric heater (127) flow into the first flow path (150). Some of the air introduced into the first Euro (150) is discharged to the side vent (116), and other parts are discharged to the center vent (126) and the floor vent (117).

[0060] Referring further to FIG. 10, in deep mode, the deep door (120) opens the defrost vent (115). The first mode door (160) closes the first flow path (150), and the side door (121) closes the side vent (116). In this case, some of the air discharged into the defrost vent (115) is discharged into the side vent (116) through the normal discharge holes (1601, 1211) formed in the first mode door (160) and the side door (121).

[0061] A vehicle air conditioning system according to one embodiment of the present invention can reduce the temperature difference between the side vent (116) and the center vent (126) and improve temperature performance by configuring a first air passage (150), a second air passage (151), a first mode door (160), and a second mode door (122). Since cold air and hot air must pass through the first mode door (160) and flow into the first air passage (150), additional space for mixing cold air and hot air can be secured in the additional space of the first air passage (150). As a result, the temperature difference between the side vent (116) and the center vent (126) can be improved.

[0062] In addition, since the temperature difference problem can be solved through the first Euro (150), second Euro (151), first mode door (160), and second mode door (122) even if the side vent (116) and the center vent (126) are spaced far apart, the space between the side vent (116) and the center vent (126) can be sufficiently large, so it can be applied to a vehicle equipped with a large screen of a rolling structure.

[0063] Although the vehicle air conditioning system according to the present invention has been described with reference to the embodiments shown in the drawings, this is merely illustrative, and anyone skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true scope of technical protection should be determined by the technical concept of the appended claims.

[0064] [Explanation of the symbol]

[0065] 100: Vehicle air conditioning system

[0066] 110: Air conditioning case 111: Evaporator

[0067] 112: Heater core 113: Rear seat temperature control door

[0068] 114: Temperature-controlled doors for all seats 115: Defrost vents

[0069] 116: Side vent 117: Floor vent

[0070] 118: Rear floor vent 119: Console vent

[0071] 120: Defrost door 121: Side door

[0072] 122: Second Mode Door 123: Rear Seat On / Off Door

[0073] 124: Rear auxiliary climate control door 125: Rear mode door

[0074] 126: Center vent 127: Electric heater

[0075] 140: Roller blind 141: Rolling section

[0076] 150: 1st Euro 151: 2nd Euro

[0077] 160: 1st Mode Door 1211, 1601: Normal Discharge Hole

Claims

1. An air conditioning case formed with a center vent for discharging air toward the center in the width direction of the vehicle, a side vent for discharging air toward the side, and a floor vent for discharging air toward the feet; a cooling heat exchanger provided in the air conditioning case for cooling the air; and a heating heat exchanger provided in the air conditioning case for heating the air, wherein The above side vents and center vents are configured separately in the front-rear direction of the vehicle, and A first mode door for controlling the amount of air discharged through the above side vent, center vent, and floor vent; and A vehicle air conditioning system having a second mode door that controls the amount of air discharged through the center vent and floor vent.

2. In Paragraph 1, The above air conditioning case is equipped with a cold air passage that passes through a cooling heat exchanger and bypasses a heating heat exchanger, and a hot air passage that passes through the heating heat exchanger. A first flow path is provided downstream of the cold air flow path and the hot air flow path in the direction of air flow, and A vehicle air conditioning system characterized by the above-mentioned first Euro branching into a side vent, a center vent, or a floor vent.

3. In Paragraph 2, A second channel is provided downstream of the first channel in the direction of air flow, and A vehicle air conditioning system characterized by the above-mentioned second Euro branching into a center vent or a floor vent.

4. In Paragraph 3, A vehicle air conditioning system characterized in that the discharge inlet of the side vent is opened toward the top, and the discharge inlet of the center vent is opened toward the rear of the vehicle.

5. In Paragraph 4, A vehicle air conditioning system in which the branch of the second Euro leading to the floor vent is positioned lower than the branch leading to the center vent.

6. In Paragraph 3, The above-mentioned first mode door is provided at the inlet of the first flow path and is a vehicle air conditioning device that controls the amount of air flowing into the first flow path.

7. In Paragraph 6, A vehicle air conditioning system equipped with a side door that controls the amount of air discharged to a side vent downstream of the first mode door in the direction of air flow.

8. In Paragraph 6, The above-mentioned second mode door is provided at the branching point of the second Euro and is a vehicle air conditioning system that controls the amount of air discharged to the center vent and the amount of air discharged to the floor vent.

9. In Paragraph 3, A structure including a vehicle screen is provided between the above-mentioned side vent and center vent, and A vehicle air conditioning system characterized in that the above-mentioned side vents and center vents are spaced apart with the above-mentioned structure in between.

10. In Paragraph 7, The above-mentioned first mode door is a vehicle air conditioning device equipped with a constant discharge hole to allow air to be discharged at all times when the Euro is closed.

11. In Paragraph 10, The above-mentioned side door is a vehicle air conditioning system equipped with a constant discharge hole to allow air to be discharged at all times when the Euro is closed.

12. In Paragraph 7, In Vent Mode, The first mode door opens the first Euro, and the side door opens the side vent, A vehicle air conditioning system characterized in that the above-mentioned second mode door is controlled to open the center vent in the second Euro.

13. In Paragraph 7, In Floor Mode, The first mode door opens the first Euro, and the side door closes the side vent. A vehicle air conditioning system characterized in that the above-mentioned second mode door is controlled to open the floor vent in the second Euro.

14. In Paragraph 7, In bi-level mode, The first mode door opens the first Euro, and the side door opens the side vent, A vehicle air conditioning system characterized in that the above-mentioned second mode door is controlled to open the center vent and floor vent in the second Euro.

15. In Paragraph 11, A defrost vent for discharging air toward the vehicle window and a defrost door for controlling the amount of air discharged through the defrost vent are provided. In Deep Mode, The above-mentioned deep door opens the defrost vent, and The first mode door closes the first Euro, and the side door closes the side vent, and A vehicle air conditioning system in which a portion of the air discharged through the above-mentioned defrost vent is discharged through a side vent via a normal discharge hole formed in a first mode door and a side door.

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