Air conditioning apparatus for vehicle

Abstract

An air conditioning apparatus for a vehicle, according to one embodiment of the present invention, comprises: a housing in which a first outside air inlet, a second outside air inlet, a first inside air inlet, a second inside air inlet, and a third inside air inlet are formed; a first door for opening and closing the first inside air inlet and the first outside air inlet; a second door for opening and closing the second inside air inlet; and a third door for opening and closing the second outside air inlet and the third inside air inlet, wherein the second door and the third door are disposed at both sides of the first door, and a rotation region of the second door may be disposed at a position lower than a rotation region of the first door.

Description

Vehicle air conditioning system

[0001] The present invention relates to an air conditioning device for a vehicle, and more particularly, to an air conditioning device for a vehicle that can be easily applied to a narrow space of a vehicle by reducing the volume of a duct.

[0002] Air conditioning systems, used to control vehicle airflow, draw in both indoor and outdoor air, purify it through filters, and allow it to flow into the vehicle's interior. Air conditioning systems feature appropriately arranged inlet and outlet passages for both indoor and outdoor air, and doors that open and close each inlet passage allow the intake of indoor and outdoor air to be adjusted to the appropriate air conditioning mode.

[0003] In the process of sucking in internal and external air through multiple intake passages, air may leak or flow back depending on the structure and arrangement of the door and intake passages, and problems may arise where the entire filter area cannot be utilized.

[0004] In addition, in order to implement a low-cost, slim air conditioner, it is necessary to appropriately form the shape and arrangement of the air conditioner's inlet passage and door to implement a small-sized air conditioner while preventing air from leaking or flowing back from each door and passage.

[0005] The present invention provides an air conditioning device that is easy to assemble and reduces manufacturing costs by reducing interference with internal vehicle components by reducing the size compared to existing air conditioning devices.

[0006] The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned herein will be clearly understood by those skilled in the art from the description below.

[0007] An air conditioning device for a vehicle according to one embodiment of the present invention may include a housing in which a first outside air inlet, a second outside air inlet, a first inside air inlet, a second inside air inlet, and a third inside air inlet are formed; a first door for opening and closing the first inside air inlet and the first outside air inlet; a second door for opening and closing the second inside air inlet; and a third door for opening and closing the second outside air inlet and the third inside air inlet.

[0008] The second door and the third door are arranged on both sides of the first door, and the rotation area of ​​the second door can be arranged lower than the rotation area of ​​the first door.

[0009] From one side of the housing, the second internal air inlet, the first internal air inlet, the first external air inlet, the second external air inlet, and the third internal air inlet can be formed in sequence.

[0010] The first air inlet and the external air inlet may be positioned above the second air inlet and the third air inlet.

[0011] The first door may have at least a portion of an arc extending in the longitudinal direction of the rotation axis based on the rotation axis, and a portion covered by the circumference of the first door may be closed, but the first internal air inlet and the first external air inlet may be formed on a surface through which the circumference of the first door passes when the first door is rotated around the rotation axis.

[0012] The above second door can be formed in a plate shape.

[0013] The third door may have at least a portion of an arc extending in the longitudinal direction of the rotation axis based on the rotation axis, and a portion covered by the circumference of the third door may be closed, but when the third door is rotated around the rotation axis, the third internal air inlet and the second external air inlet may be formed on a surface through which the circumference of the third door passes.

[0014] The rotational areas of the first door and the third door may be formed so that at least a portion overlaps in the direction in which outside air is introduced from the outside air inlet.

[0015] The rotation area of ​​the first door may be in contact with one side of the rotation area of ​​the second door and the rotation area of ​​the third door, and the rotation area of ​​the first door may be positioned above the rotation area of ​​the second door and the rotation area of ​​the third door based on the contacting portion.

[0016] The rotation axis of the second door may be formed at one end of the circumference of the rotation area of ​​the first door.

[0017] A filter covering the lower surface of the housing is further included, and when the second door is opened to the maximum, one end of the second door can be positioned to contact the filter.

[0018] The distance between the rotation axis of the second door and the filter may correspond to the length of the second door.

[0019] The rotation axis of the first door may be placed at the center of the housing.

[0020] The rotation axis of the third door is arranged adjacent to the upper side of the filter and may be arranged lower than the rotation axis of the first door.

[0021] An outside air inlet duct that communicates with the outside of the vehicle is formed by extending from the above outside air inlet, and outside air from the engine room of the vehicle can be introduced into the third inside air inlet.

[0022] The surface connecting the rotation axis and the circumference of the first door in the longitudinal direction of the rotation axis can be opened.

[0023] A rubber member is arranged on the frame of the first door to seal the space between the first door and the housing.

[0024] An air conditioning system for a vehicle according to some embodiments may include a housing in which a first outside air inlet, a second outside air inlet, and a third inside air inlet opening toward the front of the vehicle and a first inside air inlet and a second inside air inlet opening toward the inside of the vehicle are formed; a first door for opening and closing the first inside air inlet and the first outside air inlet; a second door for opening and closing the second inside air inlet; and a third door for opening and closing the second outside air inlet and the third inside air inlet.

[0025] When the third door partially opens the second outside air inlet, the third inside air inlet can be closed.

[0026] The above first door can completely open or close the first internal air inlet and the first external air inlet depending on the air conditioning mode.

[0027] The above third door is controlled in multiple stages according to the air conditioning mode, so that the second outside air inlet can be partially opened and closed, but the third inside air inlet can be completely opened and closed.

[0028] The second external air inlet may be formed larger than the third internal air inlet.

[0029] The vehicle air conditioning system according to some embodiments may further include a filter covering a lower surface of the housing.

[0030] The first internal air inlet and the third internal air inlet are arranged on both sides of the external air inlet, and the third door has at least a portion of an arc extending in the longitudinal direction of the rotation axis based on the rotation axis, and the rotation axis of the third door is arranged adjacent to the upper surface of the filter, and the circumference of the third door can be opened and closed by covering the third internal air inlet or the external air inlet.

[0031] A radial surface extending radially from the rotation axis of the third door may be formed so that at least a portion of the surface is open and empty.

[0032] Among the surfaces connecting the rotation axis and the circumference of the third door, the side extending in the longitudinal direction of the rotation axis is open to allow air to pass through.

[0033] When the third door closes the third intake port, one of the sides extending in the longitudinal direction of the rotation axis among the surfaces connecting the rotation axis and the circumference of the third door can be arranged parallel to the filter.

[0034] When the third door closes the third intake port, the upper surface of the filter can be exposed through the opened side of the third door.

[0035] The rotational areas of the first door and the third door may be in contact with the front of the outside air inlet, and a first separating wall may be formed that extends from the portion where the rotational areas of the first door and the third door are in contact to the upper surface of the filter.

[0036] The above first partition wall is formed to extend along the longitudinal direction of the rotation axis of the third door, and can partition a space in which the third door is placed and other spaces of the housing.

[0037] The third door is fixed to the first partition wall, and can seal the outside air inlet in the portion covered by the circumference of the third door.

[0038] The third door has a protrusion formed such that at least a portion of the circumferential surface of the third door extends in the circumferential direction, and an insertion groove corresponding to the shape of the protrusion is formed at the end of the first partition wall, so that when the third door closes the second outside air inlet, the protrusion can be inserted into the insertion groove.

[0039] The circumference of the third door is formed with a mounting portion that extends at least partially in the longitudinal direction of the rotation axis of the third door, and the inner surface of the housing is in close contact with both sides of the third door where the mounting portion is formed, and a slot is formed to correspond to the shape of the mounting portion, so that the mounting portion can be rotated in a sliding manner after being mounted inside the slot.

[0040] The above third door can open the third intake port only in the betting mode.

[0041] The circumferential surface area of ​​the third door may be formed to be larger than the area of ​​the third inlet port.

[0042] When the third door opens and closes a portion of the second external air inlet, the third internal air inlet can be maintained in a closed state.

[0043] The second external air inlet may be formed larger than the third internal air inlet.

[0044] An air conditioning system for a vehicle according to some embodiments may include a housing in which a first outside air inlet, a second outside air inlet, and a third inside air inlet opening toward the front of the vehicle and a first inside air inlet and a second inside air inlet opening toward the inside of the vehicle are formed; a first door for opening and closing the first inside air inlet and the first outside air inlet; a second door for opening and closing the second inside air inlet; and a third door for opening and closing the second outside air inlet and the third inside air inlet.

[0045] When the second door is opened, the second door divides the inner space of the housing so that the inner and outer air can flow through separate paths.

[0046] An air conditioning system for a vehicle according to some embodiments further includes a filter covering a lower surface of the housing, wherein the filter can be positioned to contact a rotating area of ​​the second door.

[0047] When the second door is opened, one end of the second door can contact the filter to partition the inner space of the housing.

[0048] The first door may have at least a portion of an arc extending in the longitudinal direction of the rotation axis based on the rotation axis, and a portion covered by the circumference of the first door may be closed, but the first internal air inlet and the first external air inlet may be formed on a surface through which the circumference of the first door passes when the first door is rotated around the rotation axis.

[0049] The third door may have at least a portion of an arc extending in the longitudinal direction of the rotation axis based on the rotation axis, and a portion covered by the circumference of the third door may be closed, but when the third door is rotated around the rotation axis, the third internal air inlet and the second external air inlet may be formed on a surface through which the circumference of the third door passes.

[0050] The rotational areas of the first door and the third door may be in contact with the front of the outside air inlet, and a first separating wall may be formed that extends from the portion where the rotational areas of the first door and the third door are in contact to the upper surface of the filter.

[0051] The above first partition wall can partition the rotational area of ​​the third door and other areas of the housing.

[0052] The outside air flowing in through the second outside air inlet can flow into a separate path through the first separation wall from the inside air flowing in through the first inside air inlet and the second inside air inlet.

[0053] The outside air flowing in through the second outside air inlet can flow in a separate path from the outside air flowing in through the first outside air inlet through the first separation wall.

[0054] In some embodiments, a vehicle air conditioning device may, when a partial intake mode is applied, close the first door and the third door, respectively, to close the first intake inlet and the third intake inlet, thereby opening the outside air intake, and open the second door to open the second intake inlet.

[0055] In some embodiments, the vehicle air conditioning device may be configured such that when the internal / external air mode is applied, the second door may be fully opened, the first door may open the first internal air inlet but close the first external air inlet, and the third door may close the third internal air inlet but open the second external air inlet.

[0056] The second door may further include a second separating wall capable of supporting the second door when the second intake port is opened to the maximum.

[0057] A through hole may be formed in the second separating wall so that the second door opens when the second intake port is closed.

[0058] In some embodiments, a vehicle air conditioning device may have a blocking member disposed on the edge of the second door.

[0059] According to one embodiment of the present invention, three internal air inlets and external air inlets are formed, and three doors are applied so that each door can open and close at least a portion of the internal air inlet and the external air inlet, and by applying a door having a shape in which at least a portion of an arc is extended, the size of the air conditioner can be reduced and interference with surrounding components can be reduced.

[0060] The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned herein will be clearly understood by those skilled in the art from the description below.

[0061] FIG. 1 is a drawing illustrating an air conditioning device for a vehicle according to one embodiment of the present invention.

[0062] FIG. 2 is a drawing showing a door of a vehicle air conditioning device according to one embodiment of the present invention in a rotated state.

[0063] FIG. 3 is a drawing illustrating a first door of an air conditioning device for a vehicle according to one embodiment of the present invention.

[0064] Figure 4 is a cross-sectional view of a first door according to one embodiment of the present invention.

[0065] FIG. 5 is a drawing illustrating a second door according to one embodiment of the present invention.

[0066] Figure 6 is a perspective view of a second door according to one embodiment of the present invention.

[0067] Figure 7 is a perspective view of a third door according to one embodiment of the present invention.

[0068] Figure 8 is a side view of a third door according to one embodiment of the present invention.

[0069] Figure 9 is a cross-sectional view of a third door according to one embodiment of the present invention.

[0070] FIG. 10 is a drawing showing a second door according to one embodiment of the present invention with a second intake port opened.

[0071] FIG. 11 is a drawing illustrating a second door according to one embodiment of the present invention preventing backflow of outside air.

[0072] FIG. 12 is a drawing illustrating an air conditioning device for a vehicle according to another embodiment of the present invention.

[0073] FIG. 13 is a drawing illustrating a first separating wall of an air conditioning device for a vehicle according to one embodiment of the present invention.

[0074] FIG. 14 is a drawing showing a third door fixed to a first partition wall according to one embodiment of the present invention.

[0075] FIG. 15 is a drawing illustrating the flow of air passing through a third door according to one embodiment of the present invention.

[0076] FIG. 16 is a drawing illustrating an air conditioning device for a vehicle according to one embodiment of the present invention implementing an outside air mode.

[0077] FIG. 17 is a drawing illustrating a vehicle air conditioning device according to one embodiment of the present invention implementing a partial air conditioning mode.

[0078] FIG. 18 is a drawing illustrating a vehicle air conditioning device according to one embodiment of the present invention implementing an internal / maximum external air mode.

[0079] FIG. 19 is a drawing illustrating a vehicle air conditioning device according to one embodiment of the present invention implementing an inside / outside variable mode 1.

[0080] FIG. 20 is a drawing illustrating a vehicle air conditioning device according to one embodiment of the present invention implementing an internal / external variable mode 2.

[0081] FIG. 21 is a drawing illustrating a vehicle air conditioning device according to one embodiment of the present invention implementing an internal / external variable mode 3.

[0082] FIG. 22 is a drawing illustrating a vehicle air conditioning device according to one embodiment of the present invention implementing an interior mode.

[0083] The present invention is susceptible to various modifications and embodiments, and specific embodiments are illustrated and described in detail in the drawings. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention. In describing the present invention, detailed descriptions of related known technologies will be omitted if they are deemed to obscure the gist of the present invention.

[0084] Terms such as first, second, etc. may be used to describe various components, but these components should not be limited by these terms. These terms are used solely to distinguish one component from another.

[0085] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprises" or "has" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0086] Additionally, throughout the specification, when we say "connected," this does not only mean that two or more components are directly connected, but also that two or more components are indirectly connected through other components, that they are electrically connected as well as physically connected, or that they are referred to by different names depending on location or function but are one.

[0087] Hereinafter, an embodiment of an air conditioning device for a vehicle according to the present invention will be described in detail with reference to the attached drawings. In the description with reference to the attached drawings, identical or corresponding components are assigned the same drawing numbers, and redundant descriptions thereof will be omitted.

[0088] The air conditioning unit used in a vehicle's air conditioning system draws in indoor and outdoor air and provides air to be discharged into the vehicle interior. The air drawn in passes through a filter (300), is filtered, cooled or heated, and discharged into the vehicle interior. The air conditioning unit is mounted inside the vehicle's front cockpit module, and thus, it is necessary to reduce its size to minimize interference with surrounding components and facilitate easy installation inside the vehicle.

[0089] FIG. 1 is a drawing illustrating an air conditioning device for a vehicle according to one embodiment of the present invention.

[0090] Referring to FIG. 1, an air conditioning device for a vehicle according to one embodiment of the present invention may include a housing (100) in which internal and external air inlets are formed, a door (220, 240, 260) for opening and closing the inlets (120, 140, 160, 180), and a filter (300).

[0091] The housing (100) may be formed with an air inlet (120, 140, 160) and an external air inlet (180), and the air inlets (120, 140, 160) may include a first air inlet (120), a second air inlet (140), and a third air inlet (160).

[0092] The first interior air inlet (120), the second interior air inlet (140), and the third interior air inlet (160) can suck in air from inside the vehicle and use it for vehicle air conditioning. The first outside air inlet (181) and the second outside air inlet (182) can be connected to the outside of the vehicle and can draw in outside air.

[0093] The first door (220) can open and close at least a portion of the first air inlet (120) and the outside air inlet (180), the second door (240) can open and close the second air inlet (140), and the third door (260) can open and close at least a portion of the third air inlet (160) and the outside air inlet (180). A portion of the outside air inlet (180) covered by the first door (220) can be referred to as the first outside air inlet (181), and the remaining portion of the outside air inlet (180) covered by the third door (260) can be referred to as the second outside air inlet (182).

[0094] The air intake ports (120, 140, 160) and the outside air intake ports (180) can be formed on the upper side of the housing (100), and the filter (300) is arranged to cover the lower surface of the housing (100) so that air introduced through the air intake ports (120, 140, 160) and the outside air intake ports (180) can pass through the filter (300).

[0095] Referring to Fig. 1, the right side may be the direction facing the front of the vehicle. The outside air inlet (180) may be opened toward the front of the vehicle to easily receive air from the outside of the vehicle. The first inside air inlet (120) and the second inside air inlet (140) may be opened toward the inside of the vehicle. Referring to Fig. 1, the left side may be the direction facing the rear of the vehicle.

[0096] The third air intake port (160) may be opened toward the front of the vehicle. Since the vehicle air conditioning system is installed inside the vehicle, the third air intake port can easily introduce air into the vehicle interior even when facing the front of the vehicle. Introducing air can be helpful for controlling the temperature inside the vehicle interior according to each air conditioning mode. Since the third air intake port is installed to communicate with the engine room, it can utilize the air inside the engine room, where temperature control is relatively easy.

[0097] Referring to Fig. 1, the first internal air inlet (120), the second internal air inlet (140), the third internal air inlet (160), and the external air inlet (180) may be opened in opposite directions. The first internal air inlet (120) and the external air inlet (180) may be arranged adjacent to each other, and the boundary between the first internal air inlet (120) and the external air inlet (180) may correspond to the boundary between the inside of the vehicle and the engine room.

[0098] The outside air inlet (180) can be applied as long as it is arranged so as to facilitate intake of air from outside the vehicle even if it is not facing the front of the vehicle. The third internal air inlet (160) can be arranged to connect the inside of the engine room and the inside of the vehicle compartment to utilize the air inside the engine room, but it can also be arranged to connect with the inside of the vehicle compartment to introduce air inside the vehicle compartment. In this arrangement, the boundary between the first internal air inlet (120) and the outside air inlet (180) can be formed to be different from the boundary between the inside of the vehicle and the engine room.

[0099] In order to reduce the size of the doors (220, 240, 260) while preventing interference between the movements of the doors (220, 240, 260) that open and close the intake ports (120, 140, 160) and the outside intake ports (180), each intake port (120, 140, 160, 180) may be formed with a step.

[0100] The rotation axis (264) of the third door (260) may be formed adjacent to the upper surface of the filter (300), and when the third door (260) closes the third inlet (160), one side of the third door (260) may be arranged in a direction parallel to the filter (300). When the third door (260) is arranged adjacent to the filter (300), the size of the housing (100) can be reduced and interference with other components arranged on the engine room side of the housing (100) can be prevented.

[0101] In the case of Fig. 1, the first internal air inlet (120) and the external air inlet (180) are shown to be formed above the second internal air inlet (140) and the third internal air inlet (160). That is, with reference to Fig. 1, the first internal air inlet (120), the second internal air inlet (140), the external air inlet (180), and the third internal air inlet (160) are shown to be formed in that order from one side, but this arrangement can be changed depending on the size and type of door applied to the duct.

[0102] In the present embodiment, the first door (220) and the third door (260) are illustrated as having a fan-shaped cross-section, and are formed in a shape extending in the longitudinal direction of the rotation axis (223, 264) of the first door (220) and the third door (260), respectively. The second door (240) is illustrated as having a flat plate shape. Each door rotates based on its respective rotation axis (223, 243) and can open and close the internal air inlet (120, 140, 160) and the external air inlet (180).

[0103] The shape of each of the air intake ports (120, 140, 160) and the outside air intake port (180) can also be changed according to the shape of the door that opens and closes the respective intake ports (120, 140, 160, 180). In the present embodiment, the first air intake port (120), the third air intake port (160), and the outside air intake port (180) are formed on the circumference and have a curvature according to the shapes of the first door (220) and the third door (260), which have fan-shaped cross sections. In the case of the second air intake port (140), the second door (240) that opens and closes it has a flat plate shape, and thus the second air intake port (140) is also formed on a flat plane.

[0104] FIG. 2 is a drawing showing a door of a vehicle air conditioning device according to one embodiment of the present invention in a rotated state.

[0105] Referring to Fig. 2, the positions of the rotational areas (a, b, c) within the duct according to the rotation of each door can be seen. The rotational areas represent the areas in which each door can rotate. The first door (220), the second door (240), and the third door (260) rotate around a rotational axis, and the rotational areas can be formed in a fan shape.

[0106] The rotation axis of the first door (220) may be formed at the center of the inside of the housing (100). That is, the second door (240) and the third door (260) may be arranged on both sides of the first door (220). In addition, the rotation area (b) of the second door (240) is arranged lower than the rotation area (a) of the first door (220), so that the space inside the housing (100) can be utilized without waste. This has the advantage of reducing the overall height of the housing (100).

[0107] The first door (220) is arranged above the second door (240) and the third door (260), and the rotation area (a) of the first door (220) is located at the upper part of the inside of the housing (100). The first door (220) rotates to cover at least a portion of the first internal air inlet (120) and the external air inlet (180), and the rotation area (a) of the first door (220) can be arranged to cover from the first internal air inlet (120) to the first external air inlet (181).

[0108] The second door (240) can be arranged at one end of the rotation area (a) of the first door (220). In the case of Fig. 2, the rotation axis (243) of the second door (240) is illustrated as being formed at the left end of the circumference formed by the rotation area (a) of the rotation area (a) of the first door (220). The second door (240) can rotate around the rotation axis (243) of the second door (240) at the end of the rotation area (a) of the first door (220). Therefore, the rotation area (b) of the second door (240) can be arranged at the lower left end of the rotation area (a) of the first door (220).

[0109] The rotation area (c) of the third door (260) may be formed so that one end thereof is in contact with the rotation area (a) of the first door (220). The third door (260) covers the third internal air inlet (160) and the second external air inlet (182). Therefore, the rotation area (c) of the third door (260) may be formed so that one end thereof is in contact with the rotation area (a) of the first door (220) in front of the external air inlet (180), so that the external air inlet (180) can be completely opened and closed. The rotation axis (264) of the third door (260) may be formed on the inner lower part of the housing (100) and may be formed adjacent to the upper part of the filter (300). Accordingly, the rotation area (c) of the third door (260) can be formed below the rotation area (a) of the first door (220).

[0110] When the first door (220) and the third door (260) are arranged as shown in Fig. 2, the outside air inlet (180) can be completely closed. Therefore, the rotation area (a) of the first door (220) and the rotation area (c) of the third door (260) can be arranged so that one side is in contact, but at least a portion overlaps in the direction in which outside air of the outside air inlet (180) is introduced. The first door (220) and the third door (260) may not have a separate configuration for sealing the space between them, so that the rotation areas (a, c) of the first door (220) and the third door (260) can be formed to overlap, thereby completely closing the outside air inlet (180).

[0111] An outside air inlet duct (400) may be formed on the outside of the outside air inlet (180). Since outside air is introduced from the outside of the vehicle, the outside air inlet duct (400) may be used to form a path from the outside of the vehicle to the inside of the duct.

[0112] The housing (100) can be formed so that at least a portion thereof is bent inwardly between the first air inlet (120) and the outside air inlet (180). The first door (220) rotates between the first air inlet (120) and the outside air inlet (180) to introduce inside air and outside air. If the housing (100) is bent inwardly and the bent portion is formed so as to contact the rotational area (a) of the first door (220), the first air inlet (120) and the outside air inlet (180) can be sealed so that they do not communicate with each other during the process of rotating the first door (220).

[0113] The first internal air inlet (120) and the external air inlet (180) may be formed larger than the second internal air inlet (140) and the third internal air inlet (160). The second internal air inlet (140) and the third internal air inlet (160) are intended to supplement the internal and external air introduced in a partial internal air mode or when the internal air amount is insufficient, and may be formed smaller than the first internal air inlet (120), which is the main internal air inlet. Accordingly, the size of the first door (220) covering the first internal air inlet (120) may be formed to have a larger radius than the second door (240) and the third door (260).

[0114] That is, the length extending from the rotation axis to the end of the door can be formed to be larger for the first door (220) than for the second door (240) and the third door (260), and the rotation area can also be formed to be wider for the rotation area (a) of the first door (220) than for the rotation areas (b, c) of the second door (240) and the third door (260).

[0115] The first door (220) opens and closes the first internal air inlet (120) and the first external air inlet (181), respectively. Depending on the air conditioning mode, the first internal air inlet (120) can be completely opened or closed, and the first external air inlet (181) can be completely closed or opened correspondingly. In other words, the first door (220) can be arranged in two different ways depending on the air conditioning mode.

[0116] In the case of the third door (260), the portion covered by the third door (260) is formed to be larger than the size of the second outside air inlet (182), so that the third inside air inlet (160) can be maintained in a closed state even when the second outside air inlet (182) is partially opened. To this end, the third inside air inlet (160) can be formed to be smaller than the second outside air inlet (182). Unlike the first door (220), the third door (260) can be multi-controlled depending on the air conditioning mode. That is, the third door (260) can only partially open and close the second outside air inlet (182) depending on the air conditioning mode.

[0117] In the case of FIGS. 1 and 2, a predetermined gap is shown between each door (220, 240, 260), the rotation shaft, and the housing (100). However, this is for the purpose of easily distinguishing each configuration in the drawing, and in reality, they can be arranged without a gap, thereby preventing internal and external air from leaking through the gap between the door and the housing (100).

[0118] FIG. 3 is a drawing illustrating a first door of an air conditioning device for a vehicle according to one embodiment of the present invention, and FIG. 4 is a cross-sectional view of the first door according to one embodiment of the present invention.

[0119] Referring to FIGS. 3 and 4, a first door (220) according to one embodiment of the present invention has at least a portion of an arc extending in the longitudinal direction of the rotation axis (223) based on the rotation axis (223), and a portion covered by the circumferential surface (221) of the first door (220) is closed, but a first internal air inlet (120) and a first external air inlet (181) can be formed on a surface through which the circumferential surface (221) of the first door (220) passes when the first door (220) rotates around the rotation axis (223).

[0120] The first door (220) may have a shape in which at least a portion of an arc drawn around the rotation axis (223) extends in the longitudinal direction of the rotation axis (223). The arc may have a central angle formed to a degree that the first intake port (120) can be completely opened and closed.

[0121] The circumferential surface (221) of the first door (220) is formed to be closed, and the inlet positioned in the direction in which the circumferential surface (221) of the first door (220) faces is closed. The first door (220) covers the first internal air inlet (120) or the first external air inlet (181), and it is necessary to reduce obstruction of the flow of air flowing in from the second external air inlet (182) that is not covered by the first door (220). To this end, the surface connecting the rotation axis (223) and the circumferential surface (221) of the first door (220) in the longitudinal direction of the rotation axis (223) may be formed to be open.

[0122] As shown in Fig. 4, both ends of the first door (220) may be formed to extend and be connected to the rotation axis (223), but to have an empty interior. When the interior of the first door (220) is formed to be empty, air can flow even to the interior of the first door (220), thereby reducing interference with the air flow toward the interior of the housing (100). Referring to Fig. 2, the air flowing in through the first intake port (120) can pass through the interior of the first door (220) and flow to the filter (300).

[0123] The area covered by the first door (220) may correspond to the area of ​​the first internal air inlet (120) or the first external air inlet (181). Alternatively, the area covered by the first door (220) may be formed to be larger than the areas of the first internal air inlet (120) and the first external air inlet (181). When the first internal air inlet (120) is closed, the first door (220) may open the first external air inlet (181), and when the first internal air inlet (120) is opened, the first external air inlet (181) may be closed. The first door (220) may be rotated and its arrangement may be changed.

[0124] The first door (220) is positioned in the middle of the first internal air inlet (120) and the first external air inlet (181), so that only a portion of the first internal air inlet (120) and the first external air inlet (181) can be opened and closed. However, a separate second external air inlet (182) and a second internal air inlet (140) are formed to implement some internal modes. Therefore, the first door (220) can be controlled to completely open and close one of the first internal air inlet (120) and the first external air inlet (181). Accordingly, the first door (220) can open and close the first internal air inlet (120) or the first external air inlet (181) in an on / off manner.

[0125] A rubber member (222) may be arranged on the edge of the first door (220). In order for the first door (220) to rotate smoothly, a predetermined gap may be formed between the first door (220) and the inner boundary of the housing (100). If there is a gap between the first door (220) and the housing (100), there may be a problem of internal and external air leaking through the gap. Therefore, to prevent this, a configuration that can close the gap while reducing interference with the rotational movement of the first door (220) may be required.

[0126] When a rubber member (222) formed of an elastic material is placed on the edge of the first door (220), the gap between the first door (220) and the housing (100) can be sealed, thereby preventing internal and external air from leaking out. The end of the rubber member (222) can come into contact with the inside of the housing (100) as the first door (220) rotates. Since the rubber member (222) is elastic, the part that comes into contact with the housing (100) can bend, thereby sealing the gap between the first door (220) and the housing (100). The material of the rubber member (222) can be applied not only to rubber but also to any other material that is elastic and can be easily bent.

[0127] FIG. 5 is a drawing illustrating a second door according to one embodiment of the present invention, and FIG. 6 is a perspective view of the second door according to one embodiment of the present invention.

[0128] Referring to FIGS. 5 and 6, a second door (240) according to one embodiment of the present invention may have a rotation shaft (243) positioned at one end of a second intake port (140) and extended to the other end to open and close the second intake port (140).

[0129] The second door (240) may be formed in a flat shape, and the rotation axis (243) may be formed adjacent to the inner boundary of the housing (100) and the end of the rotation area (a) of the first door (220), and the longitudinal direction of the second door (240) may be arranged so that it faces the lower side of the duct. In this case, the second door (240) rotates downward and opens the second intake port (140) so that the intake air can be introduced from the second intake port (140).

[0130] The rotation area (b) of the second door (240) can be formed adjacent to the upper portion of the filter (300), and when the second door (240) is opened to the maximum, the second door (240) can be arranged perpendicular to the upper portion of the filter (300).

[0131] The second intake inlet (140) is connected to the inside of the vehicle like the first intake inlet (120) to introduce intake air, but forms a separate path from the first intake inlet (120) to allow intake air to flow. Even when the first intake inlet (120) is closed, a certain amount of intake air can be introduced into the duct through the second intake inlet (140) when the partial intake mode is applied.

[0132] The second door (240) can be operated on / off. The second air inlet (140) can be used in two modes, either fully opened or fully closed by the second door (240), and the second air inlet (140) can be fully opened or fully closed depending on the air conditioning mode set by the user. Therefore, the second air inlet (140) does not need to be opened only by a certain amount, and the second door (240) can be formed in a flat plate shape (241).

[0133] The second door (240) may be arranged so that the air entering through the second intake port (140) forms a separate path from the air entering through the first intake port (120) and the outside air intake port (180). That is, the second door (240) may be arranged so that when opened, it comes into contact with the filter (300), so that the air entering through the second intake port (140) may flow only into the space of the housing (100) partitioned by the second door (240).

[0134] A rubber member (242) may be placed on the edge of the second door (240) to partition the inner space of the housing (100). When the second door (240) fully opens the second inlet port (140), a predetermined gap may be formed between the second door (240), the filter (300), and the housing (100), and the gap may be sealed by the rubber member (242).

[0135] The rubber member (242) is elastic, and the portion that comes into contact with the housing (100) and the filter (300) can be bent to seal the gap between the second door (240), the housing (100), and the filter (300). Any material that is elastic and can be easily bent, not just rubber, can be used as the material for the rubber member (242).

[0136] FIG. 7 is a perspective view of a third door according to one embodiment of the present invention, FIG. 8 is a side view of a third door according to one embodiment of the present invention, and FIG. 9 is a cross-sectional view of a third door according to one embodiment of the present invention.

[0137] Referring to FIGS. 7 to 9, a third door (260) according to one embodiment of the present invention has at least a portion of an arc extending in the longitudinal direction of a rotation axis (264) based on a rotation axis, and a circumferential surface (263) of the third door (260) can be opened and closed while covering the third internal air inlet (160) or the second external air inlet (182). The circumferential surface (263) of the third door (260) is formed to be closed, and thus, an inlet formed at a location on the circumferential surface (263) of the third door (260) can be closed.

[0138] The rotation axis (264) of the third door (260) can be positioned adjacent to the upper surface of the filter (300). Since the rotation axis (264) is positioned on the lower side of the housing (100), the third door (260) rotates while being positioned facing upward, thereby opening and closing the second external air inlet (182) and the third internal air inlet (160).

[0139] The cross-section (261) of the third door (260) may be formed in a fan shape, but the inside of the third door (260) may be formed to be empty. Referring to FIGS. 7 and 9, the inside of the third door (260) is empty, and both ends may extend to and be connected to the rotation axis (264). When the inside of the third door (260) is empty, air can flow into the inside of the third door (260) without causing resistance to the air flow.

[0140] The circumference (263) of the third door (260) can be formed wider than the third intake port (160). The third door (260) can cover the second outside air inlet (182). When the variable outside air mode is applied, the amount of outside air introduced can be controlled by adjusting the area of ​​the second outside air inlet (182) covered by the third door (260). In the variable outside air mode, the third inside air inlet (160) is kept closed. Therefore, the size of the third door (260) can be formed large so that at least a portion of the circumference (263) of the third door (260) covers the second outside air inlet (182) and closes the third inside air inlet (160). That is, the center angle of the circumference (263) of the third door (260) can be formed large so that it covers the second outside air inlet (182) and the third inside air inlet (160) at the same time.

[0141] Referring to Fig. 9, a circumference (263) of the third door (260) may be formed with a mounting portion (265) that extends at least partially in the longitudinal direction of the rotation axis (264). The third door (260) rotates about the rotation axis (264) inside the housing (100), and in order for the rotational movement of the third door (260) to be stably performed, the third door (260) may be rotated while at least partially being hooked on the inside of the housing (100).

[0142] A slot (not shown) may be formed on the inside of the housing (100) to correspond to the shape of the mounting portion (265) of the third door (260). When the third door (260) is rotated while mounted in the slot, the mounting portion (265) may slide and move inside the slot. In this case, the mounting portion (265) is prevented from moving in a different direction by the slot, so that the rotational movement of the third door (260) can be performed stably. Since the mounting portion (265) is extended and inserted into the inside of the slot, the inlet covered by the third door (260) can be closed without a gap.

[0143] FIG. 10 is a drawing showing a second door according to one embodiment of the present invention with a second inlet port opened, and FIG. 11 is a drawing showing a second door according to one embodiment of the present invention preventing backflow of outside air.

[0144] Referring to Fig. 10, when the second door (240) opens the second intake port (140), the end of the second door (240) may be arranged to be in contact with the upper surface of the filter (300). The second door (240) may be in contact with the upper surface of the filter (300) and may define a space inside the housing (100). Since the end of the second door (240) is arranged to be in contact with the upper surface of the filter (300), the rotational area (b) of the second door (240) may be formed to be in contact with the upper surface of the filter (300).

[0145] When the second door (240) divides the space inside the housing (100) as shown in FIG. 10, the internal air that enters through the second internal air inlet (140) flows through the area formed on the left side of the second door (240), and the internal and external air that enters through the first internal air inlet (120) and external air inlet (180) flows through the area on the right side of the second door (240) and flow in separate flow paths.

[0146] Referring to Fig. 11, it can be seen that the inner space of the housing (100) is partitioned by the second door (240) to prevent backflow of outside air. In the case of Fig. 11, the first door (220) closes the first internal inlet (120), and the third door (260) closes the third internal inlet (160), so that the outside air inlet (180) is completely open.

[0147] Since the outside air inlet (180) is completely open, outside air is introduced through the outside air inlet (180). It is preferable that the outside air flows toward the filter (300) inside the housing (100). However, if the outside air is introduced strongly and quickly depending on the external environment, such as when the vehicle is moving at a high speed, it may flow back toward the inside of the vehicle through the second internal inlet (140).

[0148] To solve the above problem, the second door (240) can prevent outside air from flowing back when fully opened by having one end contact the upper surface of the filter (300). Accordingly, outside air can flow only through the right side area of ​​the housing (100) among the areas defined by the second door (240) and not flow back into the vehicle interior.

[0149] The second door (240) may be arranged so that one end is in contact with the upper surface of the filter (300) when the second intake port (140) is opened, but in a direction perpendicular to the upper surface of the filter (300). In this case, the distance between the rotation axis (243) of the second door (240) and the filter (300) may correspond to the length of the second door (240). The second door (240) may be arranged perpendicular to the upper surface of the filter (300) to partition the space inside the housing (100) and serve as a partition wall that blocks air flow.

[0150] The second door (240) may be inclined at an angle other than vertical when in contact with the upper surface of the filter (300). This may be applicable if one end of the second door (240) is in contact with the upper surface of the filter (300) and easily partitions the space within the housing (100).

[0151] A rubber member (242) may be placed on the edge of the second door (240) so that the second door (240) completely partitions the inner space of the housing (100). The rubber member (242) is placed at the end of the second door (240) so that the second door (240) can be closed without any gap when closing the second intake port (140), and when opening the second intake port (140), the space between the filter (300) and the second door (240) can be sealed to partition the inner space of the housing (100).

[0152] FIG. 12 is a drawing illustrating an air conditioning device for a vehicle according to another embodiment of the present invention.

[0153] Referring to FIG. 12, an air conditioning device for a vehicle according to another embodiment of the present invention may further include a second partition wall (250) on one side of the second door that supports the second door when the second door (240) opens the second intake port (140).

[0154] The second separation wall (250) can be formed on one side of the second door (240) based on the arrangement in which the second door (240) opens the second intake port (140), and can be formed on the right side of the second door (240) based on FIG. 12 to support the second door (240).

[0155] The shape of the second separating wall (250) may correspond to the shape of the second door (240) and may be formed to be in close contact with the second door (240), and may be formed to extend from the rotational axis of the second door (240) to the upper surface of the filter (300). In the present embodiment, the second door (240) is illustrated as being formed in a flat plate shape, and the second separating wall (250) may also be formed in a flat plate shape to support the second door (240).

[0156] In order not to obstruct the air flow inside the housing (100) when the second door (240) closes the second intake port (140), the center of the second separating wall (250) may be formed to be empty. When the center of the second separating wall (250) is empty, air can pass through the center of the second separating wall (250) and move through the filter (300) arranged at the lower side of the second door (240), and the entire area of ​​the filter (300) can be utilized.

[0157] FIG. 13 is a drawing showing a first partition wall of a vehicle air conditioning device according to one embodiment of the present invention, and FIG. 14 is a drawing showing a third door according to one embodiment of the present invention fixed to the first partition wall.

[0158] Referring to FIGS. 13 and 14, a vehicle air conditioning device according to one embodiment of the present invention may further include a first separating wall (500) disposed between a rotational area of ​​a first door (220) and a rotational area of ​​a third door (260).

[0159] The rotational area (a, c) of the first door (220) and the rotational area (a, c) of the third door (260) are arranged so that one side is in contact with the front of the outside air inlet (180). Accordingly, the first separating wall (500) can be formed to extend from the part where the rotational area (a) of the first door (220) and the rotational area (c) of the third door (260) are in contact to the upper part of the filter (300).

[0160] The first partition wall (500) serves to partition the inner space of the housing (100), and can separate the outside air introduced through the first outside air inlet (181) of the first door (220) and the outside air introduced through the second outside air inlet (182) covered by the third door (260). That is, the outside air introduced through the second outside air inlet (182) covered by the third door (260) can flow in the direction in which the rotational area (c) of the third door (260) is arranged.

[0161] Fig. 14 illustrates a third door (260) fixed to a first partition wall (500). First, the shape of the third door (260) will be examined. The shape of the third door (260) is illustrated in Figs. 7 to 9. Referring to Fig. 7, the third door (260) is formed so that at least a portion of the arc extends in the longitudinal direction of the rotation axis (264), and a surface extending radially with respect to the rotation axis (264) of the third door (260) may be formed so as to be open so that at least a portion is empty. That is, among the surfaces connecting the circumferential surface (263) of the third door (260) and the rotation axis (264), a side extending in the longitudinal direction of the rotation axis (264) may be formed so as to be open. Accordingly, the third door (260) can be connected to the rotation axis (264) on both sides through a fan-shaped surface (261), as shown in Fig. 7. In order for the circumferential surface (263) of the third door (260) to be stably connected to the rotation axis (264), it is also possible for a surface to be formed at the center of the rotation axis (264) that connects the circumferential surface (263) and the rotation axis (264).

[0162] Referring to Fig. 8, the circumferential surface (263) of the third door (260) may be formed with a protrusion (262) extending at least partly in the circumferential direction. The protrusion (262) is a portion that extends in the circumferential direction based on the rotation axis (264) of the third door (260) and protrudes, and the third door (260) can be fixed and the outside air inlet (180) can be sealed by inserting the protrusion (262) into one end of the first partition wall (500).

[0163] Accordingly, the circumference of the third door (260) may be formed with a protrusion (262) extending at least a portion of the circumference (263) in the direction in which the first separating wall (500) is arranged. An insertion groove (510) may be formed in a portion where the first separating wall (500) and the rotational area (c) of the third door (260) come into contact to correspond to the shape of the protrusion (262). The insertion groove (510) may be formed to extend in the longitudinal direction of the rotational axis of the third door (260) from one end of the first separating wall (500) and may correspond to the length of the protrusion (262). When the third door (260) rotates and moves toward the first separating wall (500), the protrusion (262) may be inserted into the inner side of the insertion groove (510).

[0164] In order to seal the gap between the first partition wall (500) and the third door (260), a separate rubber member may be formed on the edge of the third door (260) or on the inside of the insertion groove (510) of the first partition wall (500).

[0165] FIG. 15 is a drawing illustrating the flow of air passing through a third door according to one embodiment of the present invention.

[0166] Referring to FIG. 15, the left drawing illustrates an arrangement in which the third door (260) closes the third internal air inlet (160), and the right drawing illustrates an arrangement in which the third door (260) closes the second external air inlet (182).

[0167] The third door (260) is formed so that the inside is empty as shown in Fig. 9, so that air can pass through the space between the rotation shaft (264) and the circumference (263). Accordingly, the outside air introduced through the second outside air inlet (182) or the inside air introduced through the third inside air inlet (160) can pass through the inside of the third door (260) and the entire filter (300) arranged below the rotational area of ​​the third door (260).

[0168] Below, we examine the internal and external airflows within the air conditioner for each mode, as well as the layout of each door. The solid arrows in the diagram represent the external airflow, while the dotted arrows represent the internal airflow.

[0169] FIG. 16 is a drawing illustrating an air conditioning device for a vehicle according to one embodiment of the present invention implementing an outside air mode.

[0170] Referring to Fig. 16, when the outside mode is implemented, the first door (220) is arranged to close the first inside inlet (120), the second door (240) is arranged to close the second inside inlet (140), and the third door (260) is arranged to close the third inside inlet (160). Accordingly, the first door (220) and the third door (260) can open the outside inlet (180).

[0171] Outside air flowing into the outside air inlet (180) through the outside air inlet duct (400) flows separated by the first separation wall (500). Outside air flowing toward the third door (260) flows to the right of the area defined by the first separation wall (500) as shown in Fig. 16 and heads toward the filter (300).

[0172] Outside air flowing toward the first door (220) flows to the left of the area defined by the first partition wall (500) as shown in Fig. 16 and heads toward the filter (300). The second door (240) is positioned so as to be in close contact with the second inside inlet (140) in order to close the second inside inlet (140), so that outside air can flow into the space formed at the bottom of the second door (240) and head toward the filter (300).

[0173] Therefore, it is possible to use the entire area of ​​the filter (300) while preventing outside air from flowing back through the third inlet (160).

[0174] FIG. 17 is a drawing illustrating a vehicle air conditioning device according to one embodiment of the present invention implementing a partial air conditioning mode.

[0175] In the partial air intake mode, both outside air and inside air flow into the duct simultaneously, but the amount of outside air introduced may be greater than the amount of inside air. Referring to Fig. 17, the first door (220) is arranged to close the first inside air inlet (120), the second door (240) is arranged to open the second inside air inlet (140), and the third door (260) is arranged to close the third inside air inlet (160).

[0176] The second door (240) is arranged to be in contact with the upper surface of the filter (300) to partition the inner space of the housing (100). The outside air flowing into the inside of the housing (100) through the outside air inlet duct (400) is divided into two by the first partition wall (500) and flows. As shown in Fig. 17, the outside air flowing to the left of the first partition wall (500) flows into the right space of the housing (100) partitioned by the second door (240) and cannot flow into the left space of the second door (240). This prevents the outside air from flowing back into the second internal inlet (140).

[0177] The outside air flowing to the right of the first separation wall (500) passes through the inner space of the third door (260) and can pass through the entire area of ​​the filter (300) placed on the lower side of the third door (260).

[0178] FIG. 18 is a drawing illustrating a vehicle air conditioning device according to one embodiment of the present invention implementing an internal / maximum external air mode.

[0179] Referring to Fig. 18, in the bet / max external mode, the first door (220) is arranged to open the first bet inlet (120). The second door (240) is arranged to open the second bet inlet (140), and the third door (260) is arranged to close the third bet inlet (160).

[0180] The first door (220) opens the first air inlet (120), and the first door (220) closes a portion of the outside air inlet (180) covered by the first door (220). Therefore, only the portion of the outside air inlet (180) covered by the third door (260) is opened.

[0181] Outside air introduced through the outside air inlet duct (400) passes through the second outside air inlet (182) covered by the third door (260) and flows to the right space of the first separation wall (500) based on the drawing. Outside air can pass through the inside of the third door (260) and flow through the entire area of ​​the filter (300) arranged at the bottom of the third door (260). Inside air can be introduced through the first inside air inlet (120) and the second inside air inlet (140).

[0182] FIG. 19 is a drawing illustrating a vehicle air conditioning device according to an embodiment of the present invention implementing an inside / outside variable mode 1, FIG. 20 is a drawing illustrating a vehicle air conditioning device according to an embodiment of the present invention implementing an inside / outside variable mode 2, and FIG. 21 is a drawing illustrating a vehicle air conditioning device according to an embodiment of the present invention implementing an inside / outside variable mode 3.

[0183] In the case of variable inlet / outlet air mode, this corresponds to a mode in which the amount of incoming outside air is sequentially adjusted. Referring to FIGS. 19 to 21, it can be seen that the third door (260) gradually narrows the opening of the second outside air inlet (182).

[0184] The first door (220) is arranged to open the first air inlet (120), and the second door is arranged to open the second air inlet (140). When the user specifies the air conditioning mode, the third door (260) rotates at a predetermined angle to control the amount of outside air introduced.

[0185] The incoming outside air flows to the right space of the first separation wall (500) based on the drawing. When the third door (260) is rotated in the inside / outside air variable mode, the third inside inlet (160) can be maintained in a closed state. Since the area covered by the third door (260) is formed to be larger than the third inside inlet (160), even if the third door (260) is rotated at a predetermined angle to adjust the open area of ​​the outside air inlet (180), the third inside inlet (160) can be maintained in a closed state.

[0186] FIG. 22 is a drawing illustrating a vehicle air conditioning device according to one embodiment of the present invention implementing an interior mode.

[0187] In the betting mode, all the betting inlets are open and the outside air inlets (180) are closed. Referring to Fig. 22, the first door (220) is arranged to open the first betting inlet (120), the second door (240) is arranged to open the second betting inlet (140), and the third door (260) is arranged to open the third betting inlet (160).

[0188] The first door (220) and the third door (260) are arranged to close the outside air inlet (180), and the outside air flowing into each of the inside inlets can flow independently in the space inside the housing (100) partitioned by the second door (240) and the first partition wall (500).

[0189] Although the present invention has been described above with reference to specific embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below.

[0190] [Explanation of symbols]

[0191] 100: Housing

[0192] 120: 1st betting inlet

[0193] 140: Second betting inlet

[0194] 160: Third betting inlet

[0195] 180: Outside air inlet

[0196] 220: First door

[0197] 240: Second door

[0198] 260: Third door

[0199] 300: Filter

[0200] 400: Outdoor air inlet duct

Claims

1. A housing in which a first external air inlet, a second external air inlet, a first internal air inlet, a second internal air inlet and a third internal air inlet are formed; A first door for opening and closing the first internal air inlet and the first external air inlet; A second door for opening and closing the second intake port; and A third door for opening and closing the second external air inlet and the third internal air inlet; An air conditioning device for a vehicle, comprising: a second door and a third door arranged on both sides of the first door; and a rotational area of the second door arranged lower than a rotational area of the first door.

2. In paragraph 1, An air conditioning device for a vehicle, wherein the second internal air inlet, the first internal air inlet, the first external air inlet, the second external air inlet, and the third internal air inlet are formed in sequence from one side of the housing.

3. In paragraph 1, An air conditioning device for a vehicle, wherein the first internal air inlet and the external air inlet are positioned higher than the second internal air inlet and the third internal air inlet.

4. In paragraph 3, An air conditioning device for a vehicle in which the first door has at least a portion of an arc extending in the longitudinal direction of the rotation axis based on the rotation axis, and a portion covered by the circumference of the first door is closed, and the first internal air inlet and the first external air inlet are formed on a surface through which the circumference of the first door passes when the first door is rotated around the rotation axis.

5. In paragraph 3, The above second door is an air conditioning device for a vehicle formed in a plate shape.

6. In paragraph 3, An air conditioning device for a vehicle in which the third door has at least a portion of an arc extending in the longitudinal direction of the rotation axis based on the rotation axis, and a portion covered by the circumference of the third door is closed, and the third internal air inlet and the second external air inlet are formed on a surface through which the circumference of the third door passes when the third door is rotated around the rotation axis.

7. In paragraph 3, An air conditioning device for a vehicle in which the rotational areas of the first door and the third door are formed to overlap at least partially in the direction in which outside air is introduced from the outside air inlet.

8. In paragraph 7, An air conditioning device for a vehicle in which the rotation area of the first door is in contact with one side of the rotation area of the second door and the rotation area of the third door, and the rotation area of the first door is positioned above the rotation area of the second door and the rotation area of the third door based on the contacting part.

9. In paragraph 8, An air conditioning device for a vehicle in which the rotation axis of the second door is formed at one end of the circumference of the rotation area of the first door.

10. In paragraph 9, A filter covering the lower surface of the above housing; An air conditioning device for a vehicle, further comprising: a second door arranged so that one end of the second door contacts the filter when the second door is opened to the maximum; 11. In paragraph 10, An air conditioning device for a vehicle, wherein the distance between the rotation axis of the second door and the filter corresponds to the length of the second door.

12. In paragraph 11, A vehicle air conditioning device in which the rotation axis of the first door is positioned at the center of the housing.

13. In paragraph 12, An air conditioning device for a vehicle in which the rotation axis of the third door is positioned adjacent to the upper surface of the filter and is positioned lower than the rotation axis of the first door.

14. In paragraph 1, An air conditioning device for a vehicle in which the third internal air inlet is closed when the third door partially opens the second external air inlet.

15. In paragraph 14, An air conditioning device for a vehicle in which the first door completely opens or closes the first internal air inlet and the first external air inlet depending on the air conditioning mode.

16. In paragraph 15, An air conditioning device for a vehicle in which the third door is controlled in multiple stages according to the air conditioning mode, such that the second outside air inlet is partially opened and closed, but the third inside air inlet is completely opened and closed.

17. In paragraph 16, An air conditioning device for a vehicle in which the second outside air inlet is formed larger than the third inside air inlet.

18. In paragraph 1, An air conditioning device for a vehicle in which the second door, when opened, divides the inner space of the housing so that the inside and outside air flow through separate paths.

19. In paragraph 18, A filter covering the lower surface of the housing; An air conditioning device for a vehicle, further comprising a filter, wherein the filter is positioned so as to be in contact with the rotational area of the second door.

20. In paragraph 19, An air conditioning device for a vehicle in which one end of the second door contacts the filter when the second door is opened, thereby dividing the inner space of the housing.

21. In paragraph 19, An air conditioning device for a vehicle in which the rotational areas of the first door and the third door are in contact with the front of the outside air inlet, and a first separating wall is formed that extends from the portion where the rotational areas of the first door and the third door are in contact to the upper surface of the filter.

22. In paragraph 21, The above first partition wall is a vehicle air conditioning device that divides the rotational area of the third door and the remaining area of the housing.

23. In paragraph 22, An air conditioning device for a vehicle in which outside air introduced through the second outside air inlet flows into a separate path through the first separation wall from inside air introduced through the first inside air inlet and the second inside air inlet.

24. In paragraph 22, An air conditioning device for a vehicle in which the outside air introduced through the second outside air inlet flows into a separate path through the first separation wall from the outside air introduced through the first outside air inlet.

25. In paragraph 22, An air conditioning device for a vehicle further comprising a second separating wall capable of supporting the second door when the second door opens the second intake port to the maximum.

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