KR102698340B1 - Air conditioner for vehicle - Google Patents

Abstract

A vehicle air conditioner capable of improving air conditioning comfort by reducing the upper and lower temperature difference in floor mode and increasing the upper and lower temperature difference in bi-level mode is disclosed. The vehicle air conditioner is a two-layer structure vehicle air conditioner in which an upper passage for introducing outside air and a lower passage for introducing inside air are separated, and includes an air conditioning case in which an air passage formed by the upper passage and the lower passage is formed; and a cooling heat exchanger and a heating heat exchanger sequentially formed in the air passage, and having an upper and lower temperature difference improvement means for selectively opening and closing a part of the upper passage or a part of the lower passage depending on the air conditioning mode.

Description

{AIR CONDITIONER FOR VEHICLE}

The present invention relates to an air conditioner for a vehicle, and more specifically, to a two-layer air conditioner for a vehicle capable of maintaining high heating performance while securing defogging performance during heating.

In general, an air conditioner for a vehicle is a device that heats or cools a cabin by introducing outside air into the cabin or circulating the air inside the cabin to heat or cool it. An evaporator for cooling and a heater core for heating are configured inside the air conditioner case, and air cooled or heated by the evaporator or heater core is selectively blown to each part of the cabin of the vehicle.

In particular, a two-layer air conditioner was developed to maintain high heating performance while securing defogging performance during heating. In winter, cold, low-humidity outside air is effective in removing frost on windows when driving with heating, but this results in lowering the indoor temperature.

The two-layer air conditioner supplies outside air to the upper part of the vehicle for defogging during heating and circulates inside air to the lower part, thereby realizing a two-layer air flow of inside and outside air, effectively removing frost by utilizing the fresh, low-humidity outside air supplied to the upper part, while providing fresh outside air to the passengers and maintaining high heating performance by supplying warm inside air to the lower part.

Fig. 1 is a cross-sectional view illustrating a conventional two-layer vehicle air conditioning system. Referring to Fig. 1, the conventional two-layer vehicle air conditioning system is composed of an air conditioning unit (1) and a blower unit (4).

The air conditioning unit (1) has an air passage (14) of a certain shape formed inside, an internal air inlet (14a) and an external air inlet (14b) partitioned by a partition wall formed on the inlet side of the air passage, and a number of air outlets formed on the outlet side. The air outlets are composed of a defrost vent (16), a face vent (17), and a floor vent (18).

A blower unit (4) is provided on the inlet side of the air conditioning unit (1), and an evaporator (2) and a heater core (3) are installed at a certain interval inside the air conditioning unit (1). The air passage of the air conditioning unit (1) is divided into an upper air passage and a lower air passage by a partition wall, and air introduced into the inner air inlet (14a) flows into the lower air passage, and air introduced into the outer air inlet (14b) flows into the upper air passage.

The upper air passage is provided with a first temp door (11) that controls the amount of air passing through and bypassing the heater core (3), and the lower air passage is provided with a second temp door (12) that controls the amount of air passing through and bypassing the heater core (3). The air outlet is provided with a defrost door (21) that controls the opening of the defrost vent (16) and a face door (22) that controls the opening of the face vent (17).

A communication vent (25) is formed at the rear end of the partition wall to connect the upper air passage and the lower air passage. The air conditioning unit (1) is provided with a communication door (24). The communication door (24) selectively opens and closes the communication vent (25) in the lower air passage across the upper air passage and the lower air passage.

In addition, an upper baffle (26) is provided at approximately the center of the outlet side of the upper air passage, which makes contact with the free end of the defrost door (21) when the defrost vent (16) is opened, and which makes contact with the free end of the face door (22) when the face vent (17) and the flue vent (25) are opened. In addition, a lower baffle (23) is provided in the lower air passage, which communicates with the lower air passage when the face vent (17) and the flue vent (25) are closed, and which blocks the lower air passage and the floor vent (18) from communicating with each other when the face vent (17) and the flue vent (25) are opened, by making contact with the free end of the flue door (24).

The blower unit (4) has a scroll case (5). The scroll case (5) is divided into an upper scroll part (53) and a lower scroll part (52) by a partition wall. An upper blower fan (55) is rotatably provided in the upper scroll part (53), and a lower blower fan (56) is rotatably provided in the lower scroll part (52). The upper blower fan (55) and the lower blower fan (56) are rotated by a motor (25). The intake duct side of the blower unit (4) is configured to selectively introduce internal or external air by an internal/external air conversion door (43).

In conventional two-level vehicle air conditioning systems, the temperature difference between the upper outlets, the defrost vent (16) and the face vent (17), and the lower outlets, the floor vent (18) tends to be greater in the floor mode than in the bi-level mode. If the upper and lower temperature difference is set appropriately in one air conditioning mode, there is a problem in that the upper and lower temperature difference in the other air conditioning mode does not satisfy the specifications.

Republic of Korea Patent No. 10-0352879 (2002.09.03)

In order to solve such conventional problems, the present invention provides an air conditioning device for a vehicle that can improve air conditioning comfort by reducing the upper and lower temperature difference in floor mode and increasing the upper and lower temperature difference in bi-level mode.

The vehicle air conditioner according to the present invention is a vehicle air conditioner having a two-layer structure in which an upper passage for introducing outside air and a lower passage for introducing inside air are separated, the vehicle air conditioner comprising: an air conditioning case in which an air passage formed by the upper passage and the lower passage is formed; and a cooling heat exchanger and a heating heat exchanger sequentially formed in the air passage, and provided with an upper-lower temperature difference improvement means for selectively opening and closing a part of the upper passage or a part of the lower passage depending on an air conditioning mode.

In the above, the upper and lower temperature difference improvement means selectively closes a part of the warm air path of the upper path or closes a part of the floor vent path of the lower path depending on the air conditioning mode.

In the above, the air outlet formed in the air conditioning case has a defrost vent and a face vent in the upper passage and a floor vent in the lower passage, and a floor door for controlling the opening of the floor vent opens and closes a communication path between the upper passage and the lower passage.

In the above, a first rib is provided on one side of the floor door.

In the above, the first rib is formed to block a portion of the upper flow path when the floor vent of the floor door is opened.

In the above, the first rib is formed as a protruding extension on one side of the floor door, so as to block a part of the upper passage when the floor door closes the communication path between the upper passage and the lower passage.

In the above, the first rib is formed to extend vertically on the upper surface of the floor door.

In the above, while the floor door partially opens the communication path between the upper and lower passages, the communication path between the upper and lower passages is closed by the first rib.

In the above, a second rib is formed facing the first rib on the upper side of the air conditioning case.

In the above, the second rib contacts the first rib when the floor door and floor vent are fully opened.

In the above, a partial baffle is formed in the upper passage of the hot air path to divide the hot air path into upper and lower sections downstream of the heating heat exchanger in the direction of air flow, and the second rib is formed to extend downward from the partial baffle.

In the above, when the floor door closes the communication path between the upper and lower passages, the first rib and the second rib come into contact to completely close the warm air passage of the upper passage formed at the lower part of the partial bulkhead.

In the above, a dividing wall formed in the air conditioning case to divide the upper flow path and the lower flow path is provided, the upper flow path is composed of an upper cold air flow path and an upper hot air flow path, the lower flow path is composed of a lower hot air flow path and a lower cold air flow path, and the upper cold air flow path, the upper hot air flow path, the lower hot air flow path, and the lower cold air flow path are formed sequentially from the top to the bottom, the upper flow path and the lower flow path are capable of communicating, and include a first temp door provided in the upper flow path to control the amount of air passing through the heating heat exchanger and the air bypassing it, and a second temp door provided in the lower flow path to control the amount of air passing through the heating heat exchanger and the air bypassing it.

In the above, in the floor mode, the rotation angle of the floor door is controlled so that the floor door partially closes the passage leading to the floor vent by completely closing the passage leading to the upper and lower passages by the first rib while the floor door partially opens the passage leading to the upper and lower passages.

In the above, in the bi-level mode, the rotation angle of the floor door is controlled so that the communication path between the upper and lower passages is completely closed, so that the first rib blocks a portion of the upper passage.

The vehicle air conditioning device according to the present invention can improve air conditioning comfort by reducing the upper and lower temperature difference in the floor mode and increasing the upper and lower temperature difference in the bi-level mode, thereby reducing the upper and lower temperature difference in the bi-level mode and the floor mode.

Figure 1 is a cross-sectional view showing a conventional two-layer vehicle air conditioning system.
Figure 2 is a cross-sectional view illustrating a two-layer vehicle air conditioning device according to one embodiment of the present invention.
FIG. 3 is a perspective view showing a floor door of a two-layer vehicle air conditioning system according to one embodiment of the present invention.
FIG. 4 is a perspective view showing the first rib and the second rib of the two-layer vehicle air conditioning device according to one embodiment of the present invention.
FIG. 5 illustrates a floor mode of an air conditioning device for a two-layer vehicle according to one embodiment of the present invention.
Figure 6 is an enlarged cross-sectional view of a portion of Figure 5.
Figure 7 illustrates a bilevel mode of an air conditioning system for a two-layer vehicle according to one embodiment of the present invention.
Fig. 8 is an enlarged cross-sectional view of a part of Fig. 7.
FIG. 9 illustrates a vent mode of an air conditioning device for a two-layer vehicle according to one embodiment of the present invention.
Fig. 10 is an enlarged cross-sectional view of a part of Fig. 9.
Figure 11 is a drawing showing the upper and lower temperature difference by mode of a conventional two-layer vehicle air conditioning system.
FIG. 12 is a drawing showing the upper and lower temperature difference by mode of a two-layer vehicle air conditioning device according to one embodiment of the present invention.

The technical configuration of a vehicle air conditioning system is described in detail according to the attached drawings as follows.

FIG. 2 is a cross-sectional view illustrating a two-layer vehicle air conditioning system according to an embodiment of the present invention, FIG. 3 is a perspective view illustrating a floor door of a two-layer vehicle air conditioning system according to an embodiment of the present invention, and FIG. 4 is a perspective view illustrating a first rib and a second rib of a two-layer vehicle air conditioning system according to an embodiment of the present invention. In the following description, the left-right direction of FIG. 2 is the front-rear direction of the vehicle.

Referring to FIGS. 2 to 4, a two-layer vehicle air conditioning device according to one embodiment of the present invention has an upper conduit (105) through which outside air is introduced and a lower conduit (106) through which inside air is introduced separated. The air conditioning device has an air conditioning case (110), a cooling heat exchanger, and a heating heat exchanger.

An air path of a certain shape is formed inside the air conditioning case (110), an air inlet is formed on the inlet side of the air path, and a number of air outlets are formed on the outlet side. The air path is composed of an upper channel (105) and a lower channel (106). The air outlets are composed of a defrost vent (116), a face vent (117), a floor vent (118), and a console vent (119).

Inside the air conditioning case (110), a defrost door (121) for controlling the opening of the defrost vent (116), a face door (122) for controlling the opening of the face vent (117), a floor door (123) for controlling the opening of the floor vent (118), and a console door (124) for controlling the opening of the console vent (119) are provided. A blower unit is provided on the inlet side of the air conditioning case (110).

A cooling heat exchanger and a heating heat exchanger are sequentially arranged in the air path of the air conditioning case (110) to exchange heat with the air passing through them. The cooling heat exchanger has an evaporator (102), and the heating heat exchanger has a heater core (103). The heating heat exchanger may further have a heat transfer heater (104) downstream of the heater core (103) in the air flow direction. The evaporator (102) and the heater core (103) are sequentially installed in the air flow direction at a certain interval.

The air path of the air conditioner case (110) is divided into an upper path (105) and a lower path (106) by a separation wall (150). The internal air introduced through the internal air inlet flows into the lower path (106), and the external air introduced through the external air inlet flows into the upper path (105). The separation wall (150) is formed to extend upstream of the evaporator (102), between the evaporator (102) and the heater core (103), and downstream of the heater core (103) and the electric heater (104).

The evaporator (102) and the heater core (103) are provided across the upper passage (105) and the lower passage (106). The upper passage (105) is provided with a first temp door (111) that controls the amount of air passing through and bypassing the heater core (103), and the lower passage (106) is provided with a second temp door (112) that controls the amount of air passing through and bypassing the heater core (103).

The upper passage (105) is composed of an upper cold air passage and an upper hot air passage, and the lower passage (106) is composed of a lower hot air passage and a lower cold air passage. The upper cold air passage, the upper hot air passage, the lower hot air passage, and the lower cold air passage are formed sequentially from the top to the bottom. The upper passage (105) and the lower passage (106) are configured to be in communication, and the floor door (123) opens and closes the communication path between the upper passage (105) and the lower passage (106).

The floor door (123) is positioned facing the rear of the heater core (103), more specifically, the rear of the electric heater (104). When the floor door (123) is rotated clockwise to the maximum, it contacts the separating wall (150) located at the rear end of the heater core (103) and the electric heater (104), thereby closing the communication path between the upper flow path (105) and the lower flow path (106). When the floor door (123) is rotated clockwise to the maximum, it contacts the separating wall (150) located at the rear end of the heater core (103) and the electric heater (104), thereby functioning as a separating wall that divides the upper flow path (105) and the lower flow path (106). When the floor door (123) is rotated counterclockwise to the maximum, the floor vent (118) is closed, and the upper passage (105) and the lower passage (106) are connected to each other.

A two-layer vehicle air conditioning system according to one embodiment of the present invention comprises means for improving upper and lower temperature differences. The means for improving upper and lower temperature differences selectively opens and closes a part of an upper passage (105) or a part of a lower passage (106) depending on an air conditioning mode. That is, the means for improving upper and lower temperature differences selectively closes a part of a warm air passage of an upper passage (105) or a part of a floor vent (118) passage of a lower passage (106) depending on an air conditioning mode. A defrost vent (116) and a face vent (117) are provided in the upper passage (105), and a floor vent (118) and a console vent (119) are provided in the lower passage (106).

More specifically, the upper and lower temperature difference improvement means selectively closes a part of the upper warm air path of the upper passage (105) or a part of the lower warm air path of the lower passage (106) depending on the air conditioning mode. The inlet of the floor vent (118) is formed facing the rear of the heater core (103) and the electric heater (104) and is formed at a position corresponding to the lower warm air path, so that blocking a part of the lower warm air path has a similar effect to blocking a part of the floor vent (118) path.

The upper and lower temperature difference improvement means includes a first rib (210) and a second rib (220). The first rib (210) is provided on one side of the floor door (123). The first rib (210) is formed to block a part of the upper flow path (105) when the floor vent of the floor door (123) is opened. It is configured to realize independent air conditioning for the driver's seat and the passenger's seat by being partitioned upper and lower by the separating wall (150) of the air conditioning case (110) and partitioned left and right by the separator.

The floor door (123) is composed of a left floor door (123a) provided on the left path divided based on the separator and a right floor door (123b) provided on the right path. The floor door (123) is composed of a flat plate (1232) that rotates around a rotation axis (1231). The first rib (210) is formed to protrude on one surface of the flat plate (1232). That is, the first rib (210) is formed to extend vertically on the upper surface of the floor door (123).

The first rib (210) is formed as a protruding extension on one side of the floor door (123), so that when the floor door (123) closes the communication path between the upper passage (105) and the lower passage (106), it blocks a part of the upper passage (105). In addition, when the floor door (123) partially opens the communication path between the upper passage (105) and the lower passage (106), the communication path between the upper passage (105) and the lower passage (106) is closed by the first rib (210).

That is, by forming the first rib (210) in the floor door (123), the floor door (123) blocks a part of the upper flow path (105) when the floor vent (118) is fully opened. In addition, the floor door (123) acts as a dividing wall that divides the upper flow path (105) and the lower flow path (106) by closing the communication path between the upper flow path (105) and the lower flow path (106) when the floor vent (118) is fully opened.

If the first rib (210) is not formed in the floor door (123), the floor door (123) must be rotated clockwise to the maximum in order to completely close the communication path between the upper passage (105) and the lower passage (106) so that the end of the floor door (123) comes into contact with the lower surface of the separating wall (150) to achieve sealing.

On the other hand, if the first rib (210) is formed in the floor door (123), the floor door (123) does not need to be rotated clockwise to the maximum extent in order to completely close the communication path between the upper passage (105) and the lower passage (106). That is, as illustrated in FIG. 6, even if the floor door (123) is rotated less by a certain angle (a) from the maximum rotation angle at which it can rotate clockwise, the communication path between the upper passage (105) and the lower passage (106) is closed by the first rib (210), thereby partitioning the upper passage (105) and the lower passage (106).

The upper passage (105) of the air conditioning case (110) is provided with a second rib (220). The second rib (220) is formed to face the first rib (210). The second rib (220) comes into contact with the first rib (210) when the floor door (123) completely opens the floor vent (118). Specifically, a partial baffle (152) is formed downstream of the heating heat exchanger in the air flow direction in the hot air passage of the upper passage (105).

The partial bulkhead (152) divides the warm air path of the upper passage (105) into upper and lower sections. The second rib (220) is formed to extend downward from the partial bulkhead (152). More specifically, the upper and lower sections of the heater core (103) and the electric heater (104) are supported by a support bulkhead (151) formed within the air conditioning case (110). The partial bulkhead (152) is formed to extend horizontally between the support bulkhead (151) formed in the upper passage (105) and the separating wall (150).

The second rib (220) may be formed to extend approximately diagonally downward from the lower surface of the partial bulkhead (152). When the floor door (123) closes the communication path between the upper passage (105) and the lower passage (106), the first rib (210) and the second rib (220) come into contact. When the first rib (210) and the second rib (220) come into contact, the warm air path of the upper passage (105) formed at the lower portion of the partial bulkhead (152) is completely closed.

FIG. 5 illustrates a floor mode of an air conditioning device for a two-layer vehicle according to an embodiment of the present invention, and FIG. 6 is an enlarged cross-sectional view of a part of FIG. 5.

Referring to FIGS. 5 and 6, in the floor mode, the first temp door (111) opens the upper hot air path and closes the upper cold air path. The second temp door (112) opens the lower hot air path and closes the lower cold air path. The floor door (123) opens the floor vent (118). The warm air of the lower path (106) that has passed through the heater core (103) and the electric heater (104) is discharged into the room through the floor vent (118). In addition, the warm air of the upper path that has passed through the heater core (103) and the electric heater (104) is discharged through the defrost vent (116).

In this case, the floor door (123) partially opens the communication path between the upper passage (105) and the lower passage (106), and the communication path between the upper passage (105) and the lower passage (106) is completely closed by the first rib (210). Accordingly, the floor door (123) partially closes the path leading to the floor vent (118). In this way, the control unit controls the rotation angle of the floor door (123) so that the floor door (123) rotates less by a certain angle (a) from the maximum opening state of the floor vent (118). That is, while the floor door (123) partially opens the communication path between the upper passage (105) and the lower passage (106), the first rib (210) is positioned adjacent to the dividing wall (150) that divides the upper and lower passages (105, 106) so that the communication path between the upper passage (105) and the lower passage (106) is partially blocked by the first rib (210).

In this way, by controlling the rotation angle of the floor door (123) in the floor mode to partially block the floor vent (118), the upper flow path (105) is not blocked by the first rib (210), and the amount of air discharged to the floor vent (118) is reduced, thereby reducing the upper and lower temperature difference.

FIG. 7 illustrates a bi-level mode of an air conditioning system for a two-level vehicle according to an embodiment of the present invention, and FIG. 8 is an enlarged cross-sectional view of a part of FIG. 7.

Referring to FIGS. 7 and 8, in the bi-level mode, the first temp door (111) opens the upper hot air path and closes the upper cold air path. The second temp door (112) opens the lower hot air path and closes the lower cold air path. The floor door (123) opens the floor vent (118). The warm air of the lower path (106) that has passed through the heater core (103) and the electric heater (104) is discharged into the interior through the floor vent (118). In addition, the warm air of the upper path that has passed through the heater core (103) and the electric heater (104) is discharged through the face vent (117).

In this case, the rotation angle of the floor door (123) is controlled so that the communication path between the upper passage (105) and the lower passage (106) is completely closed, so that the first rib (210) blocks a part of the upper passage (105).

In this way, by controlling the rotation angle of the first rib (210) formed in the floor door (123) in the bi-level mode to block a portion of the upper passage (105), the amount of warm air discharged to the face vent (117) can be reduced, thereby further increasing the upper and lower temperature difference.

FIG. 9 illustrates a vent mode of an air conditioning device for a two-layer vehicle according to an embodiment of the present invention, and FIG. 10 is an enlarged cross-sectional view of a part of FIG. 9.

Referring to FIGS. 9 and 10, in the vent mode, the first temp door (111) closes the upper hot air path and opens the upper cold air path. The second temp door (112) closes the lower hot air path and opens the lower cold air path. The floor door (123) closes the floor vent (118). The cold air of the upper path (105) that passes through the evaporator (102) and bypasses the heater core (103) and the electric heater (104) is discharged through the face vent (117).

In addition, some of the cold air of the lower passage (106) that passes through the evaporator (102) and bypasses the heater core (103) and the electric heater (104) is discharged through the console vent (119), and the other part moves to the upper passage (105) through the communication path between the upper passage (105) and the lower passage (106) and is discharged through the face vent (117). In this case, the floor door (123) opens the communication path between the upper passage (105) and the lower passage (106).

By forming the first rib (210) in the floor door (123) and the second rib (220) in the air conditioning case (110), the effect of blocking a portion of the upper passage (105) when the floor door (123) fully opens the floor vent (118) in the bi-level mode is sufficiently achieved, while minimizing the resistance of air rising from the lower passage (106) through the upper passage (105) in the vent mode, thereby preventing a decrease in wind volume.

That is, compared to a configuration that forms ribs only on the floor door to reduce the temperature difference between the upper and lower parts, a configuration in which two ribs are formed on the floor door and the air conditioning case respectively sufficiently achieves the effect of reducing the temperature difference between the upper and lower parts while minimizing air resistance in vent mode to prevent a decrease in wind volume.

FIG. 11 is a drawing showing the upper and lower temperature difference by mode of a conventional two-layer vehicle air conditioning system, and FIG. 12 is a drawing showing the upper and lower temperature difference by mode of a two-layer vehicle air conditioning system according to an embodiment of the present invention.

Referring to Fig. 11, in the case of a conventional two-level vehicle air conditioner not having a first rib and a second rib, it can be confirmed that the upper and lower temperature difference between the upper and lower outlets (temperature difference between the floor vent and the defrost vent) in the floor mode is 23.1°C, and the upper and lower temperature difference between the upper and lower outlets (temperature difference between the floor vent and the face vent) in the bi-level mode is 13.1°C. Therefore, the upper and lower temperature difference in each mode of the conventional two-level vehicle air conditioner is 10°C.

Referring to FIG. 12, in the case of a two-level vehicle air conditioner according to an embodiment of the present invention having a first rib and a second rib, it can be confirmed that the upper and lower temperature difference between the upper and lower outlets (temperature difference between the floor vent and the defrost vent) in the floor mode is 22.8°C, and the upper and lower temperature difference between the upper and lower outlets (temperature difference between the floor vent and the face vent) in the bi-level mode is 18.1°C. Therefore, the upper and lower temperature difference by mode in the conventional two-level vehicle air conditioner is 4.7°C.

Finally, it can be confirmed through experimental examples that the air conditioning comfort can be improved by reducing the upper and lower temperature differences in the bi-level mode and floor mode.

Up to now, the vehicle air conditioning device according to the present invention has been described with reference to the embodiments shown in the drawings, but this is merely exemplary, and anyone skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true scope of technical protection should be determined by the technical idea of the appended patent claims.

102: Evaporator 103: Heater Core
104: Electric heater
110: Air conditioning case 111: 1st temp door
112: Second Temp Door 116: Defrost Vent
117: Facevent 118: Floorvent
119: Console event
121: Defrost Door 122: Face Door
123: Floor door 124: Console door
150: Separating wall 151: Supporting bulkhead
152: Partial bulkhead
210: 1st rib 220: 2nd rib

Claims (15)

In a vehicle air conditioning system with a two-layer structure in which the upper passage through which outside air flows in and the lower passage through which inside air flows in are separated,
An air conditioning case having an air path formed by an upper path and a lower path; and
It includes a cooling heat exchanger and a heating heat exchanger sequentially formed in the above air path,
The air outlet formed in the air conditioning case is provided with a defrost vent and a face vent in the upper passage and a floor vent in the lower passage.
The floor door that controls the opening of the above floor vent opens and closes the communication path between the upper and lower passages,
A first rib is formed protruding on the upper surface of the floor door,
An air conditioning device for a vehicle in which the first rib blocks a portion of the warm air path of the upper path when the floor door is controlled to open the floor vent and completely close the passages of the upper and lower paths. In the first paragraph,
The above first rib,
An air conditioning system for a vehicle, characterized in that it selectively closes a portion of the warm air path of the upper passage or a portion of the floor vent path of the lower passage depending on the air conditioning mode. delete delete delete delete In the first paragraph,
An air conditioning device for a vehicle, characterized in that the first rib is formed to extend vertically on the upper surface of the floor door. In the first paragraph,
An air conditioning device for a vehicle, characterized in that the first rib is positioned adjacent to a dividing wall that divides the upper and lower passages so that the first rib partially blocks the communication path between the upper and lower passages while the floor door partially opens the communication path between the upper and lower passages. In the first paragraph,
An air conditioning device for a vehicle, characterized in that a second rib is formed facing the first rib on the upper passage of the air conditioning case. In Article 9,
An air conditioning device for a vehicle, characterized in that the second rib is in contact with the first rib when the floor door and the floor vent are fully opened. In Article 9,
An air conditioner for a vehicle, characterized in that a partial partition is formed in the upper passage of the hot air path to divide the hot air path into upper and lower sections downstream of the heating heat exchanger in the direction of air flow, and the second rib is formed to extend downward from the partial partition. In Article 11,
An air conditioning device for a vehicle, characterized in that when the above floor door closes the communication path between the upper and lower passages, the first rib and the second rib come into contact to completely close the warm air path of the upper passage formed at the lower part of the partial bulkhead. In the first paragraph,
A separating wall is formed in the above air conditioning case to divide the upper and lower passages,
The upper flow path is composed of an upper cold air flow path and an upper hot air flow path, and the lower flow path is composed of a lower hot air flow path and a lower cold air flow path, and the upper cold air flow path, upper hot air flow path, lower hot air flow path, and lower cold air flow path are formed sequentially from top to bottom.
The upper and lower ducts are connected to each other,
An air conditioning system for a vehicle, comprising: a first temp door provided in an upper passage to control the amount of air passing through a heating heat exchanger and air bypassing it; and a second temp door provided in a lower passage to control the amount of air passing through a heating heat exchanger and air bypassing it. In the first paragraph,
An air conditioning device for a vehicle, characterized in that in floor mode, the rotation angle of the floor door is controlled so that the first rib is positioned adjacent to a dividing wall dividing the upper and lower passages so that the first rib partially blocks the communication path between the upper and lower passages while the floor door partially opens the communication path between the upper and lower passages, thereby allowing the floor door to partially close the passage leading to the floor vent. In the first paragraph,
An air conditioner for a vehicle, characterized in that in the bi-level mode, the rotation angle of the floor door is controlled so that the communication path between the upper and lower passages is completely closed, and the first rib blocks a portion of the upper passage.

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