AIR CONDITIONING FOR VEHICLES

Abstract

Disclosed is an air conditioner for a vehicle which can reduce the temperature of the air discharged through the defrost vent and increase the temperature of the air discharged through the face vent, thereby preventing the increase of vertical temperature differences and suppressing the direct discharge of cold air through the constant discharge port.The air conditioner for a vehicle includes an air conditioning case in which an air passage and a plurality of air outlet ports are formed; and a cooling heat exchanger and a heating heat exchanger sequentially arranged in the air passage of the air conditioning case in an air flow direction, the air outlet ports including a defrost vent and a face vent, and a temperature channel is provided in an air passage within the air conditioning case to guide cool air flowing through the cooling heat exchanger to the outlet port of the defrost vent and warm air flowing through the heating heat exchanger to the outlet port of the face vent.

Description

BACKGROUND OF THE PRESENT INVENTION Field of the present invention The present invention relates to an air conditioner for a vehicle, and more particularly to an air conditioner for a vehicle that improves temperature performance in a structure in which a defrost vent and a face vent oppose a warm air passage. State of the art A vehicle air conditioner is generally a component of the vehicle's interior that serves to cool or heat the vehicle's interior in summer or winter, or to ensure the driver's front and rear visibility by removing frost from the windshield during rainy or winter seasons. The air conditioner is typically equipped with a heating and cooling system to selectively supply indoor or outdoor air, heat or cool the air, and blow the heated or cooled air into the vehicle's interior, thereby cooling, heating, or ventilating the vehicle interior. Referring to Fig. 1, a conventional air conditioner 1 for a vehicle includes an air conditioning case 10, an evaporator 20, which is a cooling heat exchanger, an indoor condenser 30, which is a heating heat exchanger, and a temperature damper 40. The evaporator 20 and the indoor condenser 30 are arranged sequentially in an airflow direction inside the air conditioning case 10. An electric heater, such as a PTC heater, may be provided downstream of the indoor condenser 13 in the airflow direction. The temperature damper 40 regulates the opening degree of a warm air passage 15 passing through the interior condenser 30 and a cool air passage 14 bypassing the interior condenser 30, thus controlling the interior temperature of the vehicle. The air conditioning case 10 includes a plurality of air outlets. The air outlets include a defrost vent 11, a face vent 12, and a floor vent 13. The defrost vent 11 blows the wind toward the vehicle windows, the face vent 12 blows the wind toward the faces of the passengers, and the floor vent 13 blows the wind toward the feet of the passengers. Furthermore, the air conditioning case 10 includes a plurality of mode flaps for controlling the opening degree of the air outlet vents. That is, the air conditioning case 10 includes a defrosting flap 51 for controlling the opening degree of the defrosting vent 11, a venting flap 52 for controlling the opening degree of the face vent 12, and a floor flap 53 for controlling the opening degree of the floor vent 13. The temperature flap 40 is of a sliding type and has a rail-shaped guide groove 60 formed on the inner wall of the air conditioning case 10 to guide the temperature flap 40. The temperature flap 40 has a driven gear 43 that meshes with a drive gear 70. Rotation of the drive gear 70 causes the temperature flap 40 to slide along the guide groove 60. The guide groove 60 extends in a convex arc shape in the downwind direction, and the temperature flap 40 is curved accordingly to fit into the guide groove 60. The drive gear 70 has a drive shaft 71 that extends in the width direction of the flap. The conventional vehicle air conditioner has a structure in which the heat exchanger is arranged horizontally, and the defrost vent 11 and the face vent 12 face the passage of warm air. Furthermore, the outlets of the defrost vent 11 and the floor vent 13 are arranged to facilitate the passage of warm air, and the face vent 12 is arranged to facilitate the passage of cold air. Therefore, in an air conditioning mode where air is discharged through the defrost vent 11 or the floor vent 13, an unintended vertical temperature inversion often occurs, in which the air discharged through the defrost vent 11 is hotter than intended. Furthermore, in an air conditioning mode where air is discharged through the face vent 12 and the floor vent 13, an excessive amount of cold air is discharged through the face vent 12 and an excessive amount of warm air is discharged through the floor vent 13, thereby increasing the vertical temperature difference. Additionally, the louver 52 may have a constant outlet for continuous air discharge. However, it is difficult for the conventional vehicle air conditioner to control the amount of cool air discharged through the constant outlet, making it difficult to meet the left-right temperature difference performance at the outlet of the face vent 12. SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems encountered in the prior art, and it is an object of the present invention to provide an air conditioner for a vehicle which can reduce the temperature of the air discharged through the defrost vent and increase the temperature of the air discharged through the face vent, thereby preventing the increase of the vertical temperature differences and suppressing the direct discharge of cold air through the constant outlet port. To achieve the above-mentioned object, according to the present invention, there is provided an air conditioner for a vehicle, comprising: an air conditioning case in which an air passage and a plurality of air outlet ports are formed; and a cooling heat exchanger and a heating heat exchanger sequentially arranged in the air passage of the air conditioning case in an air flow direction, the air outlet ports including a defrosting vent and a face vent, and a temperature duct is provided in an air passage within the air conditioning case for guiding cool air flowing through the cooling heat exchanger to the outlet port of the defrosting vent and for guiding warm air flowing through the heating heat exchanger to the outlet port of the face vent. The temperature duct includes: a cold air guide part that guides the cold air flowing through the cooling heat exchanger to the outlet port of the defrosting vent; and a warm air guide part that guides the warm air flowing through the heating heat exchanger to the outlet port of the face vent. The cold air guide part prevents the warm air flowing through the heater core from moving directly to the defrost vent and guides the cold air flowing through the cooling core to move to the outlet of the defrost vent. The defroster vent and the face vent are formed above the heater core and face a warm air passage. The face vent is positioned further back in the vehicle than the defroster vent, and a cold air passage passing through the cooling core is positioned further back in the vehicle than the warm air passage passing through the heater core. The temperature duct is formed separately and connected directly below the face vent outlet in the air conditioning casing. A vent flap is configured to guide and adjust the opening degree of the face vent. The temperature channel includes a plate-shaped body part corresponding to a sliding path of the vent flap. The warm air guide part is configured to penetrate the body part in the thickness direction, and the cold air guide part is formed on the body part along the sliding path of the vent flap. The warm air guide part penetrates both sides of the body part in the thickness direction to connect the face vent with the warm air passage. A plurality of vertical partitions protruding in the thickness direction are formed on a surface of the body part, and the vertical partitions are spaced apart from each other in the vehicle width direction. The cold air guide part is formed in a space between the vertical partitions, and the cold air guide part and the warm air guide part are separated from each other by the vertical partitions. The warm air guide part, the cold air guide part and another warm air guide part are arranged one after the other in the temperature duct in the vehicle width direction, so that the cold air guide part is positioned between the warm air guide parts. The warm air guide part, the cold air guide part, another warm air guide part and another cold air guide part are arranged one after the other in the temperature duct in the vehicle width direction, so that the cold air guide parts and the warm air guide parts are arranged alternately in the vehicle width direction. The warm air guide part is positioned further to the side in the vehicle width direction than the cold air guide part. The face vent includes a center vent and a side vent in the vehicle width direction, and the center vent and the side vent are each arranged to correspond to at least one of the cold air guide part and the warm air guide part in the vehicle width direction. The air outlet opening includes a floor vent provided on the side of the air conditioning casing, and the temperature duct includes a floor air guide part that guides the warm air flowing through the heater core to the outlet opening of the floor vent. The floor air guide part is formed on the outermost side of the temperature duct in the vehicle width direction. A horizontal partition wall crosses a through hole of the warm air guide part in the vehicle width direction to partially block the warm air guide part, and the horizontal partition wall is positioned to correspond to the end of the vent in the sliding direction of the vent during a two-plane operation in which air is discharged to the face vent and the floor vent. The face vent includes a center vent and a side vent in the vehicle width direction, and a constant outlet opening is formed in the vent flap, allowing continuous airflow to the side vent. During the air conditioning mode in which the face vent is closed, the constant outlet opening is positioned within the warm air guide part to be exposed to the through hole of the warm air guide part. In another aspect of the present invention, there is provided an air conditioner for a vehicle, comprising: an air conditioning case in which an air passage and a plurality of air outlet ports are formed; and a cooling heat exchanger and a heating heat exchanger sequentially arranged in the air passage of the air conditioning case in an air flow direction, wherein the air outlet ports include a defrost vent and a face vent, wherein a constant outlet port is formed in a louver that adjusts the opening degree of the face vent to allow air to be continuously discharged to the face vent, and wherein a temperature channel is provided in an air passage within the air conditioning case to prevent cold air flowing through the cooling heat exchanger from being discharged through the constant outlet port. The temperature duct directs the cold air flowing through the cooling heat exchanger to the defroster vent outlet and the warm air flowing through the heater core to the face vent outlet. The temperature duct includes a warm air passage partition that prevents cold air from being discharged to the constant outlet during a two-level mode in which air is discharged to the face vent and the floor vent. The warm air passage partition intersects the through hole of the warm air guide part in the vehicle width direction to partially block the warm air guide part. The louver is configured to slide and adjust the opening degree of the face vent. The temperature duct includes a plate-shaped body part corresponding to the sliding path of the louver. The body part has a plurality of vertical partitions projecting on one side of the body part in the thickness direction and spaced apart in the vehicle width direction. The face vent includes a center vent and a side vent provided in the vehicle width direction. The warm air passage partition is formed on the body part at a position corresponding to the side vent to protrude from the vertical partitions in the thickness direction of the louver, thereby blocking the airflow between the cold air passage and the constant outlet hole. The temperature duct includes a cold air blocking wall that reduces the amount of cold air discharged to the face vent during the bi-level mode in which air is discharged to the face vent and the floor vent. The vent flap is configured to slide and adjust the opening degree of the face vent. The temperature duct includes a plate-shaped body part that corresponds to the sliding path of the vent flap. The body part has a plurality of vertical partition walls that protrude on one side of the body part in the thickness direction and are spaced apart in the vehicle width direction. The face vent includes a center vent and a side vent provided in the vehicle width direction.The cold air blocking wall is formed to protrude from the body part in the thickness direction of the louver and cross the cold air guide part in the vehicle width direction. The temperature duct includes a cold air guide wall that directs the cold air flowing through the cooling heat exchanger to the downstream side of the heater core, thereby increasing static pressure downstream of the heater core. The louver is configured to slide and adjust the opening degree of the face vent. The temperature duct includes a plate-shaped body part that corresponds to the sliding path of the louver. The cold air guide wall is formed within the warm air guide part and extends side by side with the sliding direction of the louver on the body part to guide air from the cold air passage to a downstream space of the heater core. The air outlet includes a floor vent provided on the side of the air conditioning case, and the temperature duct includes a floor cool air guide wall that guides the cool air flowing through the cooling heat exchanger to the floor vent. The louver is configured to slide and adjust the opening degree of the face vent, and the temperature duct includes a plate-shaped body part that corresponds to the sliding path of the louver. The floor cool air guide wall is formed inside the warm air guide part and inclined at a predetermined angle on the body part to guide the air from the cool air passage to the floor vent. The vehicle air conditioner according to the present invention can lower the temperature of the air discharged through the defrost vent, thereby preventing a passenger's head area from becoming hot during the air conditioning mode in which air is discharged through the defrost vent and satisfying the temperature difference performance between the upper and lower outlets. Furthermore, the vehicle air conditioner can raise the temperature of the air discharged through the face vent, thereby improving the straightness of the air discharged through the front air outlet and satisfying the vertical temperature difference performance during the bi-level mode. In addition, the vehicle air conditioning system includes the temperature duct at a location where the outlet passages of the face vent, floor vent and defrost vent intersect, thereby maximizing the mixing effect in environments where the space of the mixing zone for cold and warm air is insufficient. Furthermore, the vehicle air conditioner according to the present invention can suppress the direct discharge of cold air through the constant outlet port. Furthermore, during the bi-level mode, the vehicle air conditioner can increase the temperature at the side outlet port and improve the left-right temperature difference performance. The air conditioner can reduce the amount of cold air flowing through the cold air guide part of the temperature duct, thereby increasing the discharge temperature. Furthermore, the vehicle air conditioner can increase the static pressure in the downstream space of the electric heater, thus minimizing the influence of warm air crossing to the opposite side of the separator during the dual control for the driver and front passenger seats. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side sectional view showing a conventional air conditioner for a vehicle. Fig. 2 is a side sectional view showing an air conditioner for a vehicle according to a first embodiment of the present invention. Fig. 3 is a perspective view showing the temperature duct of the air conditioner for the vehicle according to the first embodiment of the present invention. Fig. 4 is a view showing an airflow within the temperature duct of the first embodiment of the present invention. Fig. 5 and Fig. 6 are perspective views showing a partial section of the air conditioner for the vehicle according to the first embodiment of the present invention. Fig. 7 is a perspective view showing the temperature duct and a separator according to the first embodiment of the present invention. Fig. 8 is a plan view showing the air conditioner for the vehicle according to the first embodiment of the present invention.9 is a plan view illustrating a state where a face vent is closed in the air conditioner for a vehicle according to the first embodiment of the present invention. FIG. 10 is an enlarged side sectional view showing a portion of the air conditioner for a vehicle according to the first embodiment of the present invention. FIGS. 11 and 12 are views showing a cold air guide part and a warm air guide part of the temperature duct according to the first embodiment of the present invention. FIGS. 13 and 14 are views showing a cold air guide part and a warm air guide part of the temperature duct according to a modification of FIG. 11. FIG. 15 is a perspective view showing a temperature duct of an air conditioner for a vehicle according to a second embodiment of the present invention.16 is a view showing airflow within the temperature duct of the second embodiment of the present invention. FIGS. 17 and 18 are bottom perspective views of the temperature duct of the vehicle air conditioner according to the second embodiment of the present invention. FIG. 19 is an enlarged perspective view showing a face vent portion where the temperature duct of the second embodiment of the present invention is installed. FIG. 20 is a view illustrating the function of a warm air passage partition wall of the temperature duct according to the second embodiment of the present invention. FIG. 21 is a view illustrating the function of a cold air blocking wall of the temperature duct according to the second embodiment of the present invention. FIG. 22 is a view showing a change in the installation position of the cold air blocking wall in FIG. 21.Fig. 23 is a view illustrating the function of a cold air guide wall of the temperature duct according to the second embodiment of the present invention. Fig. 24 is a view illustrating the function of a floor cold air guide wall of the temperature duct according to the second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The technical configuration of an air conditioning system for a vehicle is described in detail below with reference to the drawings. Referring to FIGS. 2 to 8, the vehicle air conditioner according to an embodiment of the present invention is a slim air conditioner with a horizontally arranged heat exchanger and has a relatively small vertical width. The vehicle air conditioner according to an embodiment of the present invention includes an air conditioning case 110, a cooling heat exchanger, a heating heat exchanger, and a door. In the following description, the left-right direction in FIG. 2 corresponds to the front-rear direction of the vehicle, while the left-right direction in FIG. 8 corresponds to the width direction of the vehicle. The air conditioning casing 110 includes an air passage and is of a slim type with a narrow vertical width. The air conditioning casing 110 includes an air inlet opening 127 and a plurality of air outlet openings. An air blower for blowing air into the air conditioning casing 110 is connected to the air inlet opening 127. The air blower selectively introduces indoor air or outdoor air and blows the air into the air conditioning casing 110. In addition, the air intake vent 127 is located below the cooling heat exchanger, so that the air flows from bottom to top. The air outlet vents of the air conditioning case 110 include a defrost vent 115, a face vent 116, and a floor vent 119. The defrost vent 115 is shaped to direct air toward the vehicle windows, the face vent 116 is shaped to direct air toward the faces of the front seat passengers, and the floor vent 119 is shaped to direct air toward the feet of the passengers. The floor vent 119 is formed on the side of the air conditioning case 110 in the vehicle width direction to direct air into the lower portion of the vehicle through a duct. The cooling heat exchanger is an evaporator 111, and the heating heat exchanger is an indoor condenser 113. An electric heater 114, such as a PTC heater, is arranged downstream of the indoor condenser 113 in the airflow direction. The evaporator 111 and the indoor condenser 113 are connected in a refrigerant circulation line that connects a compressor, an expansion valve, etc., to act as a cooling medium or heating medium depending on the state of the refrigerant. That is, the refrigerant flowing through the evaporator 111 exchanges heat with the air to cool the air, and the refrigerant flowing through the indoor condenser 113 exchanges heat to heat the air. The evaporator 111 and the internal condenser 113 are arranged sequentially in the air passage of the air conditioning case 110 in the airflow direction. The evaporator 111, the internal condenser 113, and the electric heater 114 are all arranged horizontally. That is, the internal passage of the air conditioning case 110 is oriented vertically relative to the floor, with the airflow directed from the bottom to the top in the direction of gravity. Furthermore, the cooling heat exchanger and the heating heat exchanger are arranged sequentially on the internal passage from bottom to top in the direction of gravity, corresponding to the airflow path. As described above, the heat exchangers are arranged horizontally relative to the floor surface or inclined at a certain angle to approach the horizontal. That is, the air is introduced into the air inlet 127 at the bottom of the air conditioning case 110 and flows upward. From the bottom, the evaporator 111, the indoor condenser 113, and the electric heater 114 are arranged sequentially. The vehicle air conditioner includes a temperature damper 112 and a plurality of mode dampers. The temperature damper 112 is located between the evaporator 111 and the interior condenser 113. The temperature damper 112 controls the opening degree between the warm air passage passing through the interior condenser 113 and the cool air passage bypassing the interior condenser 113 to adjust the interior temperature of the vehicle. That is, the temperature damper 112 controls the amount of air flowing through the interior condenser 113 and the electric heater 114 or the amount of air flowing around the interior condenser 113 and the electric heater 114, depending on its position. The temperature damper 112 is a plate damper that slides horizontally within the air conditioning casing 110, adjusting the opening degree between the cold air passage and the warm air passage. The sliding temperature damper 112 contributes to reducing the height of the air conditioning casing 110. The mode dampers include a defrost damper 117 for adjusting the opening degree of the defrost vent 115, a vent damper 118 for adjusting the opening degree of the face vent 116, and a floor damper for adjusting the opening degree of the floor vent 119. In this case, the vent damper 118 functions as a sliding damper. A separator 250 is provided within the air conditioning case 110, which divides the interior of the air conditioning case 110 into left and right passages in the vehicle width direction. The separator 250 divides the air passage of the air conditioning case 110 into left and right passages, thereby enabling independent right and left air conditioning for the driver's seat and the passenger seat. The air passage inside the air conditioning case 110 is divided into left and right passages by the separator 250. Meanwhile, the face vent 116 includes a center vent 162 and side vents 161 arranged in the vehicle width direction. Specifically, the left passage divided by the separator 250 is divided into the center vent 162 and the side vent 161 by a partition wall, and the right passage is also divided into the center vent 162 and the side vent 161 by a partition wall. Consequently, the center vent 162 is formed in the central region in the vehicle width direction, and the side vents 161 are positioned on both sides. The vehicle air conditioner according to a first embodiment of the present invention includes a temperature duct 200. The temperature duct 200 is provided in the air passage within the air conditioning case 110 and guides the cold air flowing through the cooling heat exchanger to the outlet port of the defrosting vent 115 and the warm air flowing through the heating heat exchanger to the outlet port of the face vent 116. The temperature duct 200 includes a cold air guide part 220, a warm air guide part 230, and a floor air guide part 240. The cold air guide part 220 guides the cold air flowing through the cooling heat exchanger to the defrosting vent 115. The warm air guide part 230 guides the warm air flowing through the heating heat exchanger to the face vent 116. The floor air guide part 240 guides the warm air flowing through the heating heat exchanger to the floor vent 119. The defrost vent 115 and the face vent 116 are located above the heater core and face the warm air passage. Furthermore, the face vent 116 is located behind the defrost vent 115 in the vehicle. The cold air passage passing through the cooling core is located behind the warm air passage passing through the heater core. Furthermore, the louver 118 is configured to slide to adjust the opening degree of the face vent 116. As described above, the cold air passing through the evaporator 111 flows along the cold air passage and passes through the face vent 116 before reaching the defrost vent 115.In contrast, the warm air passing through the indoor condenser 113 and the electric heater 114 flows along the warm air passage and is easily discharged through the defrost vent 115. The temperature duct 200 prevents the warm air from flowing directly to the outlet of the defrost vent 115 and directs the cold air to the outlet of the defrost vent 115. In other words, the temperature duct 200 directs the cold air flowing through the evaporator 111 to the outlet of the defrost vent 115 and the warm air flowing through the interior condenser 113 and the electric heater 114 to the outlet of the face vent 116. In addition, the temperature duct 200 controls the amount of warm air and the amount of cold air flowing to the outlet of the floor vent 119. Therefore, the temperature of the air discharged through the defrost vent 115 is lowered, preventing the passenger's head area from becoming hot in air conditioning modes such as the defrost mode, the mixed mode, and the floor mode, and meeting the temperature difference performance between the upper and lower outlets. Furthermore, the temperature duct 200 can increase the temperature of the air discharged through the face vent 116, thereby improving the straightness of the air discharged to the face vent 116 and improving the vertical temperature difference performance during a bi-level mode. The temperature duct 200 is formed separately and connected to the air conditioning casing 110 directly below the outlet opening of the face vent 116. Specifically, the temperature duct 200 includes a body portion 210, vertical partitions 225, and horizontal partitions 235. The body portion 210 is slightly curved and shaped to correspond to a sliding path of the louver 118. When the louver 118 slides in a straight line, the body portion 210 is straight to correspond to the sliding path of the louver 118. Alternatively, as in this embodiment, when the louver 118 slides in a streamlined manner, the body portion 210 is also streamlined to correspond to the sliding path of the louver 118. The warm air guide member 230 is shaped to penetrate the body part 210 in the thickness direction. When the temperature duct 200 is installed in the air conditioning case 110, the warm air guide member 230 is shaped to penetrate in the vertical direction. That is, the warm air guide member 230 penetrates both sides of the body part 210 in the thickness direction to connect the warm air passage and the face vent 116. The warm air flowing through the interior condenser 113 and the electric heater 114 is discharged upward through a through hole of the warm air guide member 230 toward the face vent 116 directly above. The cold air guide member 220 prevents the warm air flowing through the heating coil from directly moving to the defrosting vent 115 and guides the cold air flowing through the cooling coil to the outlet of the defrosting vent 115. The cold air guide member 220 is formed on the body member 210 along the sliding path of the louver 118. The cold air guide member 220 is located on the upper side of the body member 210. The louver 118 slides directly above the temperature duct 200. In other words, the cold air guide member 220 is formed in a space between the body member 210 and the louver 118 in the vertical direction. The plurality of vertical partition walls 225 are formed on a surface of the body part 210 so as to protrude in the thickness direction. The vertical partition walls 225 are spaced apart from each other in the vehicle width direction. The cold air guide part 220 is defined by a gap between the vertical partition walls 225. That is, the cold air guide part 220 is formed in the space between the vertical partition walls 225. In addition, the vertical partition walls 225 serve as partition walls to separate the cold air guide part 220 from the warm air guide part 230. By adjusting the distance between the vertical partition walls 225, the width of the cold air guide part 220 can be varied. Because the temperature duct 200 is manufactured separately and installed in the air conditioning case 110, the vertical partitions 225 can be shaped to have different spacings depending on the specifications of the air conditioning system installed in the vehicle. In this way, the temperature duct 200 can be easily adapted to different specifications by varying the shape of the temperature duct 200, the position of its through-holes, and the spacing and orientation of the partitions, including the vertical partitions 225, without requiring a change in the overall design of the air conditioning case 110. The cold air guide part 220 and the warm air guide part 230 are divided by the vertical partition walls 225. Therefore, the vehicle air conditioner according to the present invention can improve the left-right temperature difference performance in the vehicle width direction by adjusting the widths of the cold air guide part 220 and the warm air guide part 230. The warm air guide part 230 is arranged laterally relative to the cold air guide part 220 in the vehicle width direction. Consequently, relatively warm air is discharged through the side vents 161 and relatively cool air is discharged through the center vent 162, thereby improving the performance of the air conditioner and increasing passenger satisfaction with the air conditioner. Furthermore, the floor air guide part 240 is formed on the outermost side of the temperature duct 200 in the vehicle width direction. Since the floor vent 119 is located on the side of the air conditioning case 110 and serves as a heater outlet, the air discharged through the floor vent 119 can adequately meet the demand for warm air, which is more needed than cold air. As shown in Fig. 6, a constant outlet opening 163 is formed in the louver 118. The constant outlet opening 163 penetrates the louver 118 in the thickness direction (vertical direction), so that air can be continuously discharged into the side vent 161. As shown in Fig. 9, in the air conditioning mode in which the louver 118 closes the face vent 116, the constant outlet opening 163 is positioned inside the warm air guide part 230 to be exposed to the through hole of the warm air guide part 230. In this case, the air conditioning mode in which the louver 118 closes the face vent 116 can include the floor mode, the mixed mode, and the defrost mode. Accordingly, air, mainly warm air, is discharged through the constant outlet opening 163, enabling efficient temperature control. The horizontal partition wall 235 is formed across the through hole of the warm air guide part 230 in the vehicle width direction. The horizontal partition wall 235 partially covers the through hole of the warm air guide part 230. Furthermore, the horizontal partition wall 235 is positioned to correspond to the end of the louver 118 in a sliding direction of the louver 118 during the bi-level mode (see Fig. 10). The bi-level mode is an air conditioning mode in which air is directed into the face vent 116 and the floor vent 119. As described above, the position of the horizontal partition 235 is related to the position of the sliding vent 118. During the two-level mode, the vent 118 partially opens the face vent 116 to a moderate degree. During the two-level mode, the position of the horizontal partition 235 can be selected to coincide with the end of the vent 118 or to be clear of the position of the vent 118. Preferably, the horizontal partition 235 is positioned within approximately 10 mm in front of or behind the end of the vent 118 during the two-level mode. As described above, each region of the temperature channel 200 influences the temperature at the outlet of the face vent 116. Referring to FIGS. 11 and 12, the warm air guide part 230, the cold air guide part 220, and another warm air guide part 230 are arranged sequentially in the temperature duct 200 in the vehicle width direction. That is, the cold air guide part 220 is located between the warm air guide parts 230 in the vehicle width direction. The temperature duct 200 is constructed in pairs on both sides of the air conditioning case 110 on the basis of the separator 250. Thus, the cold air guide part 220 and the warm air guide part 230 are respectively arranged at the side vent 161 and the center vent 162 on the left side on the basis of the separator 250, and the cold air guide part 220 and the warm air guide part 230 are also arranged at the side vent 161 and the center vent 162 on the right side. Referring to FIGS. 13 and 14, the warm air guide member 230, the cold air guide member 220, another warm air guide member 230, and another cold air guide member 220 are arranged sequentially in the vehicle width direction in the temperature duct 200. That is, the cold air guide member 220 and the warm air guide member 230 are alternately arranged in the vehicle width direction. Thus, the cold air guide member 220 and the warm air guide member 230 are respectively arranged at the side vent 161 and the center vent 162 on the left side based on the separator 250, and the cold air guide member 220 and the warm air guide member 230 are also arranged at the side vent 161 and the center vent 162 on the right side. As described above, the center vent 162 and the side vent 161 are arranged so that at least one cold air guide portion 220 and at least one warm air guide portion 230 correspond to each other in the vehicle width direction. Therefore, the vehicle air conditioner according to the present invention can effectively meet the desired air conditioning performance and temperature by adjusting the ratio between the cold air guide portion 220 and the warm air guide portion 230. The present invention includes the temperature duct 200 provided at a location where the outlet passages of the face vent 116, the floor vent 119, and the defrost vent 115 intersect, thereby maximizing the mixing effect of cool and warm air in environments with limited mixing zone space by installing the temperature duct 200 at locations where the mixing zone space for cool and warm air is insufficient. Referring to FIGS. 15 to 24, a vehicle air conditioner according to a second embodiment of the present invention includes a temperature duct 200. The second embodiment will be described only for configurations different from the first embodiment. The temperature duct 200 is formed in the air passage of the air conditioning case 110 and prevents cold air flowing through the cooling heat exchanger from being discharged through the constant outlet opening 163 of the louver 118. The temperature duct 200 includes a cold air guide part 220, a warm air guide part 230, and a floor air guide part 240. The temperature duct 200 is formed separately and connected to the air conditioning casing 110 directly below the outlet opening of the face vent 116. Specifically, the temperature duct 200 includes a body portion 210 and vertical partitions 225. The body portion 210 is slightly curved and shaped to correspond to a sliding path of the vent flap 118. When the vent flap 118 slides in a straight line, the body portion 210 is straight to correspond to the sliding path of the vent flap 118. When the vent flap 118 slides in a streamlined manner, the body portion 210 is also streamlined to correspond to the sliding path of the vent flap 118. The floor air guide part 240 is located on the outermost side of the temperature duct 200 in the vehicle width direction. Since the floor vent 119 is located on the side of the air conditioning case 110 and serves as a heater outlet, the air discharged through the floor vent 119 can adequately meet the demand for warm air, which is more needed than cold air. In addition, the warm air guide part 230, the cold air guide part 220, another warm air guide part 230, and another cold air guide part 220 are arranged sequentially in the vehicle width direction within the temperature duct 200. That is, the cold air guide part 220 and the warm air guide part 230 are alternately arranged in the vehicle width direction. Accordingly, the cold air guide part 220 and the warm air guide part 230 are respectively arranged at the side vent 161 and the center vent 162 on the left side based on the separator 250, and the cold air guide part 220 and the warm air guide part 230 are also arranged at the side vent 161 and the center vent 162 on the right side. As described above, the center vent 162 and the side vent 161 are arranged so that at least one cold air guide part 220 and at least one warm air guide part 230 correspond to each other in the vehicle width direction. Therefore, the vehicle air conditioner according to the present invention can effectively meet the desired air conditioning performance and temperature by adjusting the ratio between the cold air guide part 220 and the warm air guide part 230. The present invention includes the temperature duct 200 provided at a position where the outlet passages of the face vent 116, the floor vent 119, and the defrost vent 115 intersect, thereby maximizing the mixing effect of cold and warm air in environments with limited mixing zone space by installing the temperature duct 200 at positions where the mixing zone space for cold air and warm air is insufficient. Meanwhile, the temperature duct 200 further includes a warm air passage partition wall 260, a cold air blocking wall 270, a cold air guide wall 280, and a floor cold air guide wall 290. The warm air passage partition 260 prevents cold air from being discharged to the constant exhaust port 163 during the bi-level mode. The bi-level mode is an air conditioning mode in which air is discharged through both the face vent 116 and the floor vent 119. The warm air passage partition 260 partially blocks the through hole of the warm air guide part 230 in the vehicle width direction. The warm air passage partition 260 is positioned to block the constant exhaust port 163 at the position of the vent flap 118 during the bi-level mode. That is, the warm air passage partition 260 is formed at the position corresponding to the side vent 161 so as to protrude from the vertical partitions 225 in the thickness direction of the louver 118 and block the airflow between the cold air passage and the constant outlet 163. As shown in Fig. 20, the warm air passage partition 260 extends to cover the constant outlet 163, thereby preventing cold air from being discharged to the constant outlet 163 formed in the louver 118 during the bi-level mode. The warm air passage partition 260 further extends from the top of the vertical partitions 225 to form a step with the vertical partitions 225. The cold air blocking wall 270 reduces the amount of cold air discharged to the face vent 116 during the bi-level mode. The cold air blocking wall 270 is shaped to protrude from the body part 210 in the thickness direction of the louver 118 and cross the cold air guide part 220 in the vehicle width direction. That is, as shown in Fig. 21, the cold air blocking wall 270 protrudes upward from the upper surface of the body part 210 corresponding to the cold air guide part 220 and blocks part of the air flowing through the cold air guide part 220 to reduce the amount of cold air. As shown in Figure 22, it is necessary to optimize the position of the cold air blocking wall 270. If the cold air blocking wall 270 is positioned along the dashed lines in the drawing, the cold air blocking wall 270 may excessively restrict the airflow during ventilation mode, resulting in airflow loss. Therefore, it is preferable to position the cold air blocking wall 270 downstream in the cold air flow direction, rather than at the starting point of the cold air guide part 220 of the temperature duct 200. The cold air guide wall 280 serves to guide the cold air flowing through the cooling heat exchanger to the downstream side of the heater core, thereby increasing the static pressure downstream of the heater core. The cold air guide wall 280 is formed within the warm air guide part 230 and extends adjacent to the sliding direction of the louver 118 on the body part 210 to guide air from the cold air passage to a downstream space of the heater core. That is, by configuring the cold air guide wall 280, cold air downstream of the electric heater 114 is guided via the warm air guide part 230, thereby increasing the static pressure in the downstream space of the electric heater 114. As shown in Fig. 23, during the ventilation mode or the bi-level mode in which the face vent 116 is open, the cold air is directed downstream of the electric heater 114, thereby increasing the static pressure downstream of the electric heater 114. Therefore, when the internal static pressure is different between the driver's seat and the passenger's seat (left and right sides in the vehicle width direction), the cold air guide wall 280 can minimize the effects of air backflow from the opposite side of the separator, which might affect the fixed side of the temperature damper 112. The floor cold air guide wall 290 guides the cold air flowing through the cooling heat exchanger to the floor vent 119. The floor cold air guide wall 290 is formed inside the warm air guide part 230 and is inclined at a predetermined angle on the body part 210 to guide the air from the cold air passage to the floor vent 119. As shown in Fig. 24, the inclination angle of the floor cold air guide wall 290 is designed to guide the air to the outlet opening of the floor vent 119. Such a configuration makes it possible to increase the temperature at the outlet of the side vent 161 during the dual-level mode, thereby improving the right-left temperature difference performance. Furthermore, the configuration can reduce the amount of cold air flowing through the cold air guide part 220 of the temperature duct 200, thereby increasing the discharge temperature. Furthermore, the vehicle air conditioner can increase the static pressure in the downstream space of the electric heater, thereby minimizing the influence of warm air flowing to the opposite side of the separator during dual control for the driver and front passenger seats. The vehicle air conditioner according to the present invention has been described with reference to the embodiments shown in the drawings, but these embodiments are merely examples. It should be appreciated that modifications and variations may be made by those skilled in the art without departing from the spirit or scope of the present invention. Therefore, the true scope of the technical protection should be defined by the spirit of the appended claims.

Claims

An air conditioner for a vehicle, comprising: an air conditioning case (110) in which an air passage and a plurality of air outlet openings are formed; and a cooling heat exchanger and a heater core that are sequentially arranged in the air passage of the air conditioning case (110) in an air flow direction, wherein the air outlet openings include a defrosting air opening (115) and a face air opening, and wherein a temperature duct (200) is provided in an air passage inside the air conditioning case (110) to guide cool air flowing through the cooling heat exchanger to the outlet opening of the defrosting air opening (115) and guide warm air flowing through the heater core to the outlet opening of the face air opening.The air conditioner according to claim 1, wherein the temperature duct (200) comprises: a cool air guide part (220) that guides the cool air flowing through the cooling heat exchanger to the outlet opening of the defrost vent (115); and a warm air guide part (230) that guides the warm air flowing through the heating heat exchanger to the outlet opening of the face vent.The air conditioner according to claim 2, wherein the cold air guide part (220) prevents the warm air flowing through the heater core from directly moving to the defrosting vent (115), and guides the cold air flowing through the cooling heat exchanger to move to the outlet opening of the defrosting vent (115).The air conditioner according to claim 2, wherein the defrosting vent (115) and the face vent are formed above the heater core and face a warm air passage, the face vent is disposed more rearward in the vehicle than the defrosting vent (115), and a cool air passage passing through the cooling heat exchanger is disposed more rearward in the vehicle than the warm air passage passing through the heater core, and wherein the temperature duct (200) is separately formed and connected directly below the outlet opening of the face vent in the air conditioning case (110).The air conditioner according to claim 2, wherein a louver (118) is formed to slide and adjust the opening degree of the face louver, wherein the temperature duct (200) comprises a plate-shaped body part (210) corresponding to a sliding path of the louver (118), wherein the warm air guide part (230) is formed to penetrate the body part (210) in the thickness direction, and wherein the cool air guide part (220) is formed on the body part (210) along the sliding path of the louver (118).The air conditioner according to claim 5, wherein the warm air guide part (230) penetrates both sides of the body part (210) in the thickness direction to connect the face vent to the warm air passage.The air conditioner according to claim 5, wherein a plurality of vertical partition walls (225) protruding in the thickness direction are formed on a surface of the body part (210), the vertical partition walls (225) are spaced apart from each other in the vehicle width direction, the cold air guide part (220) is formed in a space between the vertical partition walls (225), and the cold air guide part (220) and the warm air guide part (230) are partitioned by the vertical partition walls (225).The air conditioner according to claim 7, wherein the warm air guide part (230), the cool air guide part (220), and another warm air guide part (230) are sequentially arranged in the temperature duct (200) in the vehicle width direction such that the cool air guide part (220) is positioned between the warm air guide parts (230).The air conditioner according to claim 7, wherein the warm air guide part (230), the cool air guide part (220), another warm air guide part (230), and another cool air guide part (220) are sequentially arranged in the temperature duct (200) in the vehicle width direction, so that the cool air guide parts (220) and the warm air guide parts (230) are alternately arranged in the vehicle width direction.The air conditioner according to claim 7, wherein the warm air guide part (230) is positioned more toward the side than the cool air guide part (220) in the vehicle width direction.The air conditioner according to claim 7, wherein the face vent includes a center vent (162) and a side vent (161) in the vehicle width direction, and wherein the center vent (162) and the side vent (161) are each disposed to correspond to at least one of the cold air guide part (220) and the warm air guide part (230) in the vehicle width direction.The air conditioner according to claim 1, wherein the air outlet port comprises a floor ventilation port (119) provided on the side of the air conditioning case (110), wherein the temperature duct (200) includes a floor air guide part (240) that guides the warm air flowing through the heater core to the outlet port of the floor ventilation port (119), and wherein the floor air guide part (240) is formed on the outermost side of the temperature duct (200) in the vehicle width direction.The air conditioner according to claim 5, wherein a horizontal partition wall (235) crosses a through hole of the warm air guide part (230) in the vehicle width direction to partially block the warm air guide part (230), and wherein the horizontal partition wall (235) is positioned to correspond to the end of the louver (118) in the sliding direction of the louver (118) during a two-plane operation in which air is discharged to the face louver and the bottom louver (119).The air conditioner according to claim 7, wherein the face vent includes a center vent (162) and a side vent (161) in the vehicle width direction, wherein a constant outlet opening (163) allowing a continuous air flow to the side vent (161) is formed in the louver (118), and wherein, during the air conditioning mode closing the face vent, the constant outlet opening (163) is positioned inside the warm air guide part (230) to be exposed to the through hole of the warm air guide part (230).An air conditioner for a vehicle, comprising: an air conditioning case (110) in which an air passage and a plurality of air outlet openings are formed; and a cooling heat exchanger and a heater core that are sequentially arranged in the air passage of the air conditioning case (110) in an air flow direction, wherein the air outlet openings include a defrosting air opening (115) and a face air opening, wherein a constant outlet opening (163) is formed in a ventilation door (118) that adjusts the opening degree of the face air opening to allow air to be continuously discharged to the face air opening, and wherein a temperature channel (200) is provided in an air passage inside the air conditioning case (110) to prevent cold air flowing through the cooling heat exchanger from being discharged through the constant outlet opening (163).The air conditioner according to claim 15, wherein the temperature duct (200) guides the cold air flowing through the cooling heat exchanger to the outlet opening of the defrost vent (115) and guides the warm air flowing through the heater core to the outlet opening of the face vent, wherein the temperature duct (200) includes a warm air passage partition (260) that prevents the cold air from being discharged to the constant outlet opening (163) during a two-plane mode in which air is discharged to the face vent and a bottom vent (119), and wherein the warm air passage partition (260) crosses the through hole of a warm air guide part (230) in the vehicle width direction to partially block the warm air guide part (230).The air conditioner according to claim 16, wherein the louver (118) is formed to slide and adjust the opening degree of the face louver, the temperature duct (200) has a plate-shaped body part (210) corresponding to the sliding path of the louver (118), the body part (210) has a plurality of vertical partition walls (225) protruding on a side of the body part (210) in the thickness direction and spaced apart in the vehicle width direction, and the face louver comprises a center louver (162) and a side louver (161) provided in the vehicle width direction, and wherein the warm air passage partition wall (260) is formed on the body part (210) at a position corresponding to the side louver (161), Therefore, the air flow between the cold air passage and the constant discharge opening (163) is blocked to protrude from the vertical partition walls (225) in the thickness direction of the louver (118).The air conditioner according to claim 15, wherein the temperature duct (200) includes a cold air blocking wall (270) that reduces the amount of cold air discharged to the face air opening during the two-plane mode in which the air is discharged to the face air opening and the bottom air opening (119), the louver (118) is configured to slide and adjust the opening degree of the face air opening, the temperature duct (200) includes a plate-shaped body part (210) corresponding to the sliding path of the louver (118), the body part (210) has a plurality of vertical partition walls (225) that protrude on one side of the body part (210) in the thickness direction and are spaced in the vehicle width direction, and the face vent includes a center vent (162) and a side vent (161) provided in the vehicle width direction, and the cold air blocking wall (270) is formed to protrude from the body part (210) in the thickness direction of the louver (118) and to cross the cold air guide part (220) in the vehicle width direction.The air conditioner according to claim 15, wherein the temperature duct (200) includes a cold air guide wall (280) that guides the cold air flowing through the cooling heat exchanger to the downstream side of the heater core, thereby increasing a static pressure downstream of the heater core, wherein the louver (118) is formed to slide and adjust the opening degree of the face louver, and the temperature duct (200) includes a plate-shaped body part (210) corresponding to the sliding path of the louver (118), and wherein the cold air guide wall (280) is formed inside the hot air guide part (230) and extends side by side with the sliding direction of the louver (118) on the body part (210) to guide air from the cold air passage to a downstream space of the heater core.The air conditioner according to claim 15, wherein the air outlet port comprises a bottom vent port (119) provided on the side of the air conditioning case (110), wherein the temperature duct (200) includes a bottom cold air guide wall (290) that guides the cold air flowing through the cooling heat exchanger to the bottom vent port (119), wherein the ventilation door (118) is formed to slide and adjust the opening degree of the face vent, and the temperature duct (200) comprises a plate-shaped body part (210) corresponding to the sliding path of the ventilation door (118), and wherein the bottom cold air guide wall (290) is formed inside the hot air guide part (230) and inclined at a predetermined angle on the body part (210) to guide the air from the cold air passage to the bottom vent port (119).

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