阅读说明：本技术 车辆用空调装置 (Air conditioner for vehicle ) 是由 金兑玩 徐容殷 徐正勋 李钟坤 金明俊 李泰建 于 2019-08-28 设计创作，主要内容包括：公开了车辆用空调装置,减少车辆前后方向上的宽度的同时充分地确保热风旁通门的开度量而防止风量的减少,并且能够执行热风旁通门与除霜门之间的高效的联动控制。车辆用空调装置包括：空调壳体,其在内部形成有空气通道；及冷却用热交换器及加热用热交换器,它们设于上述空调壳体的空气通道而与通过它们的空气进行热交换,上述车辆用空调装置具备：热风旁通通道,其供通过了上述加热用热交换器的空气直接排出到前座地板通风口；及热风旁通门,其调节上述热风旁通通道的开度,上述热风旁通门由旋转轴和板件构成,上述板件以至少具备两个面的方式形成折弯部。(Disclosed is an air conditioner for a vehicle, which can reduce the width in the front-rear direction of the vehicle, fully ensure the opening amount of a hot air bypass door to prevent the reduction of air volume, and can perform efficient linkage control between the hot air bypass door and a defrosting door. An air conditioning device for a vehicle includes: an air conditioning case having an air passage formed therein; and a cooling heat exchanger and a heating heat exchanger which are provided in an air passage of the air conditioning case and exchange heat with air passing therethrough, the vehicle air conditioning apparatus including: a hot air bypass passage through which the air passing through the heating heat exchanger is directly discharged to a front floor vent; and a hot air bypass door for adjusting an opening degree of the hot air bypass passage, the hot air bypass door including a rotary shaft and a plate, the plate having a bent portion formed on at least two surfaces.)

1. An air conditioning device for a vehicle, comprising: an air conditioning case having an air passage formed therein; and a cooling heat exchanger and a heating heat exchanger which are provided in an air passage of the air conditioning casing and exchange heat with air passing therethrough,

the vehicle air conditioner includes:

a hot air bypass passage through which the air passing through the heating heat exchanger is directly discharged to a front floor vent; and

a hot air bypass door for adjusting the opening of the hot air bypass passage,

the hot air bypass door is composed of a rotating shaft and a plate, and the plate is provided with a bending part in a mode of at least two surfaces.

2. An air conditioning device for a vehicle according to claim 1,

the plate member is formed into two surfaces obliquely with the bent portion as a reference.

3. An air conditioning device for a vehicle according to claim 1,

the hot air bypass passage is formed on a partition wall which divides the hot air passage and the front seat floor vent.

4. An air conditioning device for a vehicle according to claim 1,

the rotary shaft of the hot air bypass door is formed closer to the upper part than the outlet of the ventilation opening of the front seat floor.

5. An air conditioning device for a vehicle according to claim 1,

the channel facing the front floor ventilation opening is composed of a 1 st channel arranged at the upstream and a 2 nd channel arranged at the downstream by taking the rotating shaft of the hot air bypass door as a reference,

the 2 nd passage has a larger cross-sectional area than the 1 st passage.

6. An air conditioning device for a vehicle according to claim 1,

the rotary shaft of the hot air bypass door is arranged above the center of the heating heat exchanger in the height direction,

the front floor vent is disposed below the center of the heating heat exchanger in the height direction.

7. An air conditioning device for a vehicle according to claim 5,

the partition walls are composed of a 1 st partition wall for dividing the hot air channel and the 1 st channel and a 2 nd partition wall for dividing the hot air channel and the 2 nd channel,

the width between the rear surface of the air-conditioning case and the 2 nd partition wall is wider than the width between the rear surface of the air-conditioning case and the 1 st partition wall, and a front seat floor vent is formed in the 2 nd passage.

8. An air conditioning device for a vehicle according to claim 1,

the hot air bypass door includes a rigidity-enhancing rib formed on the opposite side of the air inflow portion of the hot air bypass duct.

9. An air conditioning device for a vehicle, comprising: an air conditioning case having an air passage formed therein; and a cooling heat exchanger and a heating heat exchanger which are provided in an air passage of the air conditioning casing and exchange heat with air passing therethrough,

the vehicle air conditioner includes:

a hot air bypass passage through which the air passing through the heating heat exchanger is directly discharged to a front floor vent;

a hot air bypass door for adjusting the opening of the hot air bypass passage; and

and a control unit which controls the defrosting door for adjusting the opening of the defrosting vent and the hot air bypass door in an interlocking manner.

10. The vehicular air-conditioning apparatus according to claim 1 or 9,

the opening direction of the hot air bypass door is opposite to the air flowing direction.

11. An air conditioning device for a vehicle according to claim 10,

the opening direction of the hot air bypass door is a direction toward the heating heat exchanger.

12. The vehicular air-conditioning apparatus according to claim 1 or 9,

when the hot air bypass door opens the hot air bypass passage, the hot air bypass door closes the flow path of the hot air passage, and guides a part of air flowing in the hot air passage to the front seat floor air vent side.

13. The vehicular air-conditioning apparatus according to claim 1 or 9,

the air conditioning device for a vehicle includes:

a front seat temperature adjusting door that adjusts an opening degree between a front seat cold air passage and a part of the hot air passage;

a 1 st rear seat temperature adjustment door disposed between the cooling heat exchanger and the heating heat exchanger, and adjusting an opening degree of the other part of the hot air passage;

a rear seat mode door which adjusts the opening degree of the rear seat air outlet; and

and a 2 nd rear seat temperature adjusting door disposed downstream of the heating heat exchanger and adjusting an opening degree between the hot air duct and the rear seat cold air duct.

14. The vehicular air-conditioning apparatus according to claim 1 or 9,

the vehicle air conditioner includes an upper flow path and a lower flow path to individually control air conditioning of a front seat and a rear seat of a vehicle.

15. An air conditioning device for a vehicle according to claim 9,

the control part performs different compensation control on the opening amount of the defrosting door according to the opening or closing condition of the hot air bypass door.

16. An air conditioning device for a vehicle according to claim 15,

the control unit controls the hot air bypass door to open the hot air bypass duct only when both the driver seat and the passenger seat are in the maximum heating state and both the driver seat and the passenger seat are in the front floor mode.

17. An air conditioning device for a vehicle according to claim 16,

when the hot air bypass door is opened, the opening amount of the defrosting door is controlled to be larger than that in the case of the closed condition.

18. An air conditioning device for a vehicle according to claim 1,

a stopper portion for sealing the air conditioner case (110) is formed on the rotary shaft of the hot air bypass door.

19. An air conditioning device for a vehicle according to claim 18,

the stopper is formed on the opposite side of the air inflow portion of the hot wind bypass passage so as not to protrude in the air passage.

20. An air conditioning device for a vehicle according to claim 18,

a step part is formed on a partition wall for dividing the hot air channel and the front seat floor vent, and a stopping part is arranged on the step part when the hot air bypass door is rotated.

Technical Field

The present invention relates to an air conditioner for a vehicle, and more particularly, to an air conditioner for a vehicle, in which an upper flow path and a lower flow path are formed to individually control air conditioning of a front seat and air conditioning of a rear seat of the vehicle.

Background

In general, an air conditioner for a vehicle is a built-in part of an automobile which is installed to cool or heat an interior of the automobile in summer or winter, to remove frost or the like appearing on a windshield in rainy days or winter, and to secure a visual field in front and rear of a driver. An air conditioner is generally provided with both a heating system and a cooling system, and cools, heats, or ventilates a vehicle interior by selectively introducing outside air or inside air, heating or cooling the air, and then blowing the air into the vehicle interior.

Korean patent laid-open publication No. 1484718 (2015.01.14) discloses an air conditioner for a vehicle, which adjusts the amount of air flowing into the rear seat by controlling the positions of a rear seat temperature adjusting door, a rear seat auxiliary temperature adjusting door, and a rear seat opening/closing door. Fig. 1 is a sectional view showing a conventional air conditioner for a vehicle. As shown in fig. 1, the air conditioner for a vehicle includes an air conditioning casing 10, an evaporator 20, a heater core 30, a front seat temperature adjustment door 51, and a front seat mode door.

The air conditioning casing 10 includes an air inlet 11 and an air outlet, and an air passage is formed therein. An air blower is connected to the air inlet 11 side to selectively flow the inside air or the outside air into the inside air passage of the air conditioning casing 10. The air outlet is constituted by a defrost vent 12, a front seat blowing face (face) vent 13, a front seat floor vent 114, a rear seat blowing face vent 15, and a rear seat floor vent 16. The internal air passage of the air conditioning case 10 is composed of a front seat cool air passage P1, a hot air passage P2, and a rear seat cool air passage P3.

The evaporator 20 serves as a cooling heat exchanger for cooling the air passing through the evaporator 20. The heater core 30 serves as a heating heat exchanger for heating air passing through the heater core 30. The heater core 30 is disposed on the downstream side of the evaporator 20 in the air flow direction, i.e., on the hot air path P2. The hot air path P2 is further provided with an electric heater 40 such as a PTC heater. The front seat temperature adjustment door 51 is disposed between the evaporator 20 and the heater core 30, and adjusts the opening degrees of the hot air path P2 passing through the heater core 30 and the cold air paths P1 and P3 bypassing the heater core 30. The front seat type door is constituted by a defroster door 53, a vent door 54, and a floor door 55.

The rear seat air passage is constituted by a rear seat cool air passage P3 through which the air having passed through the evaporator 20 bypasses the heater core 30, and a hot air passage through the heater core 30. The hot air path of the rear seat air path is used together with the hot air path P2 of the front seat air path. That is, a part of the air flowing through the hot air path P2 through the heater core 30 moves upward and is discharged to at least one of the defrost vent 12, the front seat blowing face vent 13, and the front seat floor vent 114, and another part of the air moves downward and is discharged to at least one of the rear seat blowing face vent 15 and the rear seat floor vent 16. The rear seat air duct includes a rear seat model door 58 that adjusts the opening degrees of the rear seat blow-out face vent 15 and the rear seat floor vent 16.

The air conditioning casing 10 includes a rear seat temperature adjustment door 52, a rear seat auxiliary temperature adjustment door 56, and a rear seat opening/closing door 57. The rear seat temperature adjustment door 52 is positioned between the evaporator 20 and the heater core 30, and adjusts the opening degrees of a path flowing to the hot air path P2 and a path flowing to the rear seat cool air path P3, and the rear seat auxiliary temperature adjustment door 56 is disposed on the downstream side of the heater core 30 in the air flow direction, and adjusts the opening degree of a path flowing to the rear seat air outlet. The rear seat opening/closing door 57 adjusts the opening degree of the rear seat cool air passage P3.

Fig. 2 is a diagram illustrating a front-rear seat cooling mode of a conventional vehicle air conditioner. Referring to fig. 2, in the front-rear cooling mode, the front-seat temperature-adjusting door 51 closes the hot-air duct P2 and opens the front-seat cool-air duct P1, and the rear-seat temperature-adjusting door 52 closes the hot-air duct P2 and opens the rear-seat cool-air duct P3. The rear seat auxiliary temperature adjusting door 56 closes the passage flowing to the rear seat air outlet, and the rear seat opening and closing door 57 opens the rear seat cool air passage P3. The air cooled by the evaporator 20 bypasses the heater core 30, so that a part of the air is discharged to at least one of the front seat air discharge ports through the front seat cool air passage P1, and the other part of the air is discharged to at least one of the rear seat air discharge ports through the rear seat cool air passage P3.

Fig. 3 is a diagram showing a front-rear seat heating mode of a conventional vehicle air conditioner. Referring to fig. 3, in the front-rear seat heating mode, the front-seat temperature-adjusting door 51 closes the front-seat cold-air passage P1 and opens the hot-air passage P2, and the rear-seat temperature-adjusting door 52 closes the rear-seat cold-air passage P3 and opens the hot-air passage P2. The rear seat auxiliary temperature adjusting door 56 opens a passage to the rear seat air outlet port, and the rear seat opening and closing door 57 closes the rear seat cool air passage P3. The air having passed through the evaporator 20 is heated by the heater core 30, and then a portion of the air moves upward to be discharged to at least one of the front seat air discharge ports, and another portion of the air moves downward to be discharged to at least one of the rear seat air discharge ports.

A conventional air conditioning device for a vehicle includes a hot air bypass duct and a hot air bypass door for opening and closing the hot air bypass duct, and directly discharges air having passed through the heater core 30 and the electric heater 40 to a floor vent.

In the case of a 3-Zone air conditioner for performing temperature control of independent 3 zones (3 zones) of a front driver seat, a front passenger seat and a rear seat (rear seat), leakage (Leak) is likely to occur due to hot air bypass doors, and when the width in the front-rear direction of the vehicle is reduced, it is not favorable to ensure the door opening amount, thereby reducing the amount of air discharged to a front seat floor vent.

Meanwhile, in the case of a 2-Zone air conditioner that performs temperature control on independent 2 zones (2 zones) of a front seat (front seat) and a rear seat (rear seat), the position of a front seat floor vent outlet is too low to form a duct on a Foot (Foot) side, and there is a problem that it is difficult to reduce the width in the vehicle front-rear direction, as in the case of a 3-Zone air conditioner.

Disclosure of Invention

Problems to be solved by the invention

In order to solve the above conventional problems, the present invention provides an air conditioning device for a vehicle, comprising: the opening amount of the hot air bypass door is sufficiently ensured while the width in the front-rear direction of the vehicle is reduced to prevent the reduction of the air volume, and efficient linkage control between the hot air bypass door and the defrosting door can be performed.

Means for solving the problems

An air conditioning device for a vehicle according to the present invention includes: an air conditioning case having an air passage formed therein; and a cooling heat exchanger and a heating heat exchanger which are provided in an air passage of the air conditioning case and exchange heat with air passing therethrough, the vehicle air conditioning apparatus being characterized by comprising: a hot air bypass passage through which the air passing through the heating heat exchanger is directly discharged to a front floor vent; and a hot air bypass door for adjusting an opening degree of the hot air bypass passage, the hot air bypass door including a rotary shaft and a plate, the plate having a bent portion formed on at least two surfaces.

In the above, the plate member is formed into two surfaces inclined with respect to the bent portion.

In the above, the hot air bypass duct is formed in a partition wall that divides the hot air duct and the front seat floor vent.

In the above, the rotary shaft of the hot air bypass door is formed above the outlet of the front seat floor vent.

In the above, the duct toward the front floor vent is composed of a 1 st duct provided upstream and a 2 nd duct provided downstream with reference to the rotation axis of the hot air bypass door, and the 2 nd duct has a larger cross-sectional area than the 1 st duct.

In the above configuration, the rotary shaft of the hot air bypass door is disposed above the center of the heating heat exchanger in the height direction, and the front floor vent is disposed below the center of the heating heat exchanger in the height direction.

In the above, the partition walls are composed of a 1 st partition wall dividing the hot air path and the 1 st path and a 2 nd partition wall dividing the hot air path and the 2 nd path, a width between the rear surface of the air-conditioning case and the 2 nd partition wall is wider than a width between the rear surface of the air-conditioning case and the 1 st partition wall, and the front seat floor vent is formed in the 2 nd path.

In the above, the hot air bypass door includes a rigidity reinforcing rib formed on the opposite side of the air inflow portion of the hot air bypass duct.

Another aspect of the present invention provides an air conditioning device for a vehicle, including: an air conditioning case having an air passage formed therein; and a cooling heat exchanger and a heating heat exchanger which are provided in an air passage of the air conditioning case and exchange heat with air passing therethrough, the vehicle air conditioning apparatus including: a hot air bypass passage through which the air passing through the heating heat exchanger is directly discharged to a front floor vent; a hot air bypass door for adjusting the opening of the hot air bypass passage; and a control unit which controls the defrosting door for adjusting the opening of the defrosting air vent and the hot air bypass door in a linkage manner.

In the above, the opening direction of the hot air bypass door is the opposite direction to the air flow direction.

In the above, the opening direction of the hot air bypass door is a direction toward the heating heat exchanger.

In the above, when the hot air bypass door opens the hot air bypass duct, the flow path of the hot air duct is closed, and a part of the air flowing through the hot air duct is guided to the front floor vent side.

In the above, the air conditioner for a vehicle includes: a front seat temperature adjusting door that adjusts an opening degree between a front seat cold air passage and a part of the hot air passage; a 1 st rear seat temperature adjustment door disposed between the cooling heat exchanger and the heating heat exchanger, and adjusting an opening degree of the other part of the hot air passage; a rear seat mode door which adjusts the opening degree of the rear seat air outlet; and a 2 nd rear seat temperature adjusting door disposed downstream of the heating heat exchanger and adjusting an opening degree between the hot air duct and the rear seat cool air duct.

In the above, the air conditioner for a vehicle includes an upper flow path and a lower flow path to individually control air conditioning of the front seat and the rear seat of the vehicle.

In the above, the control unit performs compensation control for the opening amount of the defrosting door differently according to the opening or closing condition of the hot air bypass door.

In the above, the control unit controls the hot air bypass door to open the hot air bypass duct only when both the driver seat and the passenger seat are in the maximum heating state and both the driver seat and the passenger seat are in the front floor mode.

In the above, when the hot air bypass door is opened, the opening amount of the defrosting door is controlled to be larger than that in the case of the closed condition.

In the above, a stopper portion performing sealing with the air-conditioning case 110 is formed at the rotation shaft of the hot wind bypass door.

In the above, the stopper is formed on the opposite side of the air inflow portion of the hot air bypass duct so as not to protrude inside the air duct.

In the above, a step portion is formed on a partition wall that partitions the hot air duct and the front floor vent, and the stopper portion is provided on the step portion when the hot air bypass door is rotated.

Effects of the invention

The invention provides an air conditioner for a vehicle, which can ensure the opening degree of a hot air bypass door to prevent the reduction of air quantity, simultaneously reduce the width of the vehicle in the front and rear direction, and perform efficient linkage control between the hot air bypass door and a defrosting door to improve the air conditioning performance.

Further, the exhaust port of the front floor vent can be ensured to be the widest, and the path of the hot air can be formed in a straight line, whereby the heating performance can be improved, and the width of the air conditioning case in the vehicle front-rear direction can be reduced. At the same time, the rigidity of the hot wind bypass door is enhanced while the obstruction of the air flow is minimized.

Drawings

Fig. 1 is a sectional view showing a conventional air conditioner for a vehicle.

Fig. 2 is a diagram illustrating a front-rear seat cooling mode of a conventional vehicle air conditioner.

Fig. 3 is a diagram showing a front-rear seat heating mode of a conventional vehicle air conditioner.

Fig. 4 is a sectional view showing an air conditioner for a vehicle according to an embodiment of the present invention.

Fig. 5 is a perspective view illustrating a hot wind bypass door according to an embodiment of the present invention.

Fig. 6 is a side view showing a hot air bypass door according to a modification of the present invention.

Fig. 7 and 8 are sectional views showing operation examples of the air conditioner for a vehicle according to the embodiment of the present invention.

Fig. 9 is a sectional view showing an air conditioning device for a vehicle according to another embodiment of the present invention.

Fig. 10 is an enlarged cross-sectional view of a part of fig. 9.

Fig. 11 and 12 are sectional views showing an operation example of fig. 10.

Fig. 13 is a sectional view showing a part of an air conditioning device for a vehicle of still another embodiment of the present invention.

Fig. 14 is a cross-sectional view showing an operation example of fig. 13.

(symbol description)

110: air-conditioning case 111: air inlet

112: defrost vent 113: front seat blowing face ventilation opening

114: front seat floor vent 115: rear seat blowing surface ventilation opening

116: rear seat floor vent 118: rear surface of air conditioner casing

119: partition wall 120: evaporator with a heat exchanger

130: heater core 140: electric heater

153: the defrost door 154: ventilation opening door

155: floor door 158: backseat type door

171: front seat temperature adjustment door 172: no. 1 back seat temperature adjusting door

159: 2 nd rear seat temperature adjustment door P1: front seat cold air channel

P2: hot air passage P3: cold air channel of rear seat

200: hot air bypass door 210: rotating shaft

220: the plate 221: bent part

222: the 1 st surface 223: the 2 nd surface

250: rigidity reinforcing rib

Detailed Description

The technical structure of the air conditioner for a vehicle will be described in detail below with reference to the accompanying drawings.

Fig. 4 is a sectional view showing a vehicle air conditioner according to an embodiment of the present invention, fig. 5 is a perspective view showing a hot air bypass door according to an embodiment of the present invention, fig. 6 is a side view showing a hot air bypass door according to a modification of the present invention, and fig. 7 and 8 are sectional views showing an operation example of the vehicle air conditioner according to an embodiment of the present invention.

As shown in fig. 4 to 8, an air conditioning device for a vehicle according to an embodiment of the present invention includes: an air conditioning case 110 having an air passage formed therein; and a cooling heat exchanger and a heating heat exchanger which are provided in an air passage of the air-conditioning case 110 and exchange heat with air passing therethrough. The air conditioner for a vehicle is provided with an upper flow path and a lower flow path to individually control air conditioning of a front seat and a rear seat of the vehicle.

The air conditioning case 110 includes an air inlet 111 and an air outlet, and an air passage is formed therein. An air blowing device is connected to the air inflow port 111 side, whereby the inside air or the outside air selectively flows into the inside air passage of the air-conditioning case 110. The air outlet is composed of a front seat air outlet composed of a defrost vent 112, a front seat blowing face vent 113, and a front seat floor vent 114, and a rear seat air outlet composed of a rear seat blowing face vent 115, and a rear seat floor vent 116.

The cooling heat exchanger is constituted by the evaporator 120. The refrigerant flowing inside the evaporator 120 exchanges heat with air passing through the evaporator 120 to cool the air. The heating heat exchanger is constituted by a heater core 130. The cooling water flowing inside the heater core 130 exchanges heat with the air passing through the heater core 130 to heat the air. The heater core 130 is disposed on the downstream side of the evaporator 120 in the air flow direction, i.e., on the hot air path P2. The hot air path P2 may further include an electric heater 140 such as a PTC heater.

The air passage inside the air conditioning case 110 is formed by a front seat cool air passage P1, a hot air passage P2, and a rear seat cool air passage P3. On the downstream side of the evaporator 120, the air passage is divided into 3 passages of a front seat cool air passage P1, a hot air passage P2, and a rear seat cool air passage P3. The front seat cold air duct P1, the hot air duct P2, and the rear seat cold air duct P3 are formed in this order from the upper portion to the lower portion, and the hot air duct P2 is disposed between the front seat cold air duct P1 and the rear seat cold air duct P3 in the up-down direction. In this case, the upper flow path is the front seat cold air passage P1 and the hot air passage P2, and the lower flow path is the rear seat cold air passage P3.

The air having passed through the evaporator 120 bypasses the heater core 130 of the hot air path P2 and flows to the front seat cold air path P1 and the rear seat cold air path P3 or flows again to the front seat cold air path P1 or the rear seat cold air path P3 after passing through the heater core 130 of the hot air path P2. The front-seat cool air passage P1 is a passage through which the air that has passed through the evaporator 120 bypasses the heater core 130 and flows toward the front seat side of the vehicle. The rear-seat cool air duct P3 is a duct through which the air that has passed through the evaporator 120 bypasses the heater core 130 and flows toward the rear seat side of the vehicle. The hot air path P2 is a path through which the air that has passed through the evaporator 120 passes through the heater core 130 and flows toward the front seat or the rear seat of the vehicle.

The air conditioning case 110 is provided with a front seat air outlet for discharging air toward the front seat side of the vehicle, and the opening degree of the front seat air outlet is controlled by the front seat mode door. The front seat mode door is composed of a defrost door 153 that adjusts the opening degree of the defrost vent 112, a vent door 154 that adjusts the opening degree of the front seat blow-out vent 113, and a floor door 155 that adjusts the opening degree of the front seat floor vent 114. Meanwhile, the air conditioning case 110 is provided with a rear seat air outlet for discharging air to the vehicle rear seat side, and the opening degree of the rear seat air outlet is controlled by the rear seat mode door 158.

The air conditioner for a vehicle includes a front seat temperature adjustment door 171. The front seat temperature adjustment door 171 adjusts the opening degree between the front seat cold air passage P1 and a part of the hot air passage P2. The front seat temperature adjustment door 171 is adjacent downstream of the evaporator 120 and located at a boundary portion where the front seat cool air passage P1 and the warm air passage P2 are separated. The front seat temperature adjustment door 171 is formed in a Tail door (Tail door) type in which plate members are formed on both sides in the radial direction around the rotation axis.

The front seat temperature adjustment door 171 is constituted by a rotary shaft, a 1 st door part and a 2 nd door part. The rotation shaft of the front seat temperature adjustment door 171 is disposed adjacent to the outlet-side lower end of the hot air passage P2. The 1 st door part is formed at one side with a rotating shaft as a center and adjusts the opening degree of a part of the upper part of the inlets of the cold air passage P1 and the hot air passage P2. The 2 nd gate part is formed on the other side with the rotation axis as the center and adjusts the opening of the front seat side outlet in the hot air passage P2.

The air conditioner for a vehicle according to one embodiment of the present invention controls the temperature of independent 3 zones (3 zones) of a front driver seat, a front passenger seat, and a rear seat (rear seat), and realizes the temperature control of the rear seat by 3 doors. That is, the vehicle air conditioner includes the 1 st rear seat temperature adjustment door 172, the 2 nd rear seat temperature adjustment door 159, and the rear seat mode door 158.

The 1 st rear seat temperature adjustment door 172 is disposed between the evaporator 120 and the heater core 130, and adjusts the opening degree of the other portion of the hot air path P2. That is, the 1 st rear seat temperature adjustment door 172 adjusts the opening degree of a portion of the inlet lower portion of the hot air passageway P2, which is not covered by the front seat temperature adjustment door 171, among the inlets of the hot air passageway P2.

The 2 nd rear seat temperature adjustment door 159 is disposed downstream of the heater core 130, and adjusts an opening degree between the hot air duct P2 and the rear seat cool air duct P3. The 2 nd rear seat temperature adjustment door 159 is configured in a Dome (Dome) door type. The hot air duct P2 downstream of the heater core 130 is configured to communicate with the rear seat cool air duct P3. The 2 nd rear seat temperature adjustment door 159 is disposed in a communication passage between the hot air passage P2 and the rear seat cold air passage P3 downstream of the heater core 130. That is, the 2 nd rear seat temperature adjustment door 159 adjusts the opening degree between the communication passage between the hot air passage P2 and the rear seat cold air passage P3 and the rear seat cold air passage P3.

The rear seat model door 158 is disposed downstream of the 2 nd rear seat temperature adjustment door 159, and adjusts the opening degree of the rear seat air outlet. The rear seat mode door 158 is constructed in a Dome (Dome) type door type. The rear mode door 158 adjusts the opening degree between the rear seat air passage, the rear seat blow-out vent 115, and the rear seat floor vent 116.

The vehicle air conditioner controls the temperature of the rear seat using the 1 st rear seat temperature adjustment door 172 and the 2 nd rear seat temperature adjustment door 159. At the same time, the On and Off of the rear seat air passageway are controlled by the rear seat mode door 158. In this way, by using 2 temperature-adjusting doors and 1 mode door, the rear seat air conditioning control is smoothly executed and the 3-zone air conditioner is realized with a reduced number of doors as compared with the conventional art. Therefore, the number of parts can be reduced to reduce the manufacturing cost, and the load and volume of the air conditioner can be reduced.

The 1 st rear seat temperature adjustment door 172 is constituted by a Dome (Dome) door type. In the case of the maximum cooling (Max Cool) condition, the 1 st rear seat temperature adjusting door 172 is located at a position closing the hot air passageway P2, and in the case of the maximum heating (Max Warm) condition, the 1 st rear seat temperature adjusting door 172 is located at a position dividing between the evaporator 120 and the heater core 130.

The 1 st rear seat temperature adjustment door 172 always opens the rear seat cool air passage P3. That is, the 1 st rear seat temperature adjustment door 172 performs the opening and closing function and the air guiding function of the hot air passageway P2 as described above without performing the opening (On)/closing (OFF) function of the rear seat cold air passageway P3 to improve the heater core performance, and the opening/closing function of the rear seat cold air passageway P3 is performed by the rear seat mode door 158, so that the opening/closing control of the rear seat air adjustment can be smoothly performed with the number of doors reduced.

On the other hand, the 1 st rear seat temperature adjustment door 172 and the 2 nd rear seat temperature adjustment door 158 are adjusted to execute the rear seat temperature control. That is, in the case of the maximum cooling (Max Cool) condition, the 1 st rear seat temperature adjustment door 172 closes the hot air passageway P2, and the 2 nd rear seat temperature adjustment door 159 closes the communication passageway between the hot air passageway P2 and the rear seat cold air passageway P3 downstream of the heater core 130. In addition, in the case of the maximum heating (Max Warm) condition, the inside of the Dome (Dome) of the 1 st rear seat temperature adjustment door 172 guides air to the hot air passageway P2 side, and the 2 nd rear seat temperature adjustment door 159 closes the rear seat cold air passageway P3. Meanwhile, in case of the Mixing (Mixing) mode, the inside of the Dome (Dome) of the 1 st rear seat temperature adjusting door 172 guides air to the hot air passageway P2 side, and the 2 nd rear seat temperature adjusting door 159 is located between the rear seat cold air passageway P3 and a communication passageway between the hot air passageway P2 and the rear seat cold air passageway P3 downstream of the heater core 130.

The air conditioner for a vehicle includes a hot air bypass duct and a hot air bypass door 200. The hot air bypass passage allows air passing through the heater core 130 and the electric heater 140 to be directly discharged to the front seat floor vent 114. The hot air bypass duct is formed in a partition wall 119 that divides the hot air duct P2 and the front seat floor vent 114. Since the air passing through the heater core 130 through the hot air bypass passage is directly discharged to the front seat floor vent 114, it is expected to improve the heating performance.

The hot air bypass door 200 adjusts the opening of the hot air bypass passage. The hot air bypass door 200 is composed of a rotary shaft 210 and a plate 220. The rotation shaft 210 is rotatably coupled to the air-conditioning case 110, and the plate 220 is formed in a relatively thin and wide plate shape and extends in a radial direction of the rotation shaft 210. Plate member 220 has at least 2 bent portions 221.

In this way, the hot air bypass door 200 is formed in 2 surfaces to form a step, so that the amount of opening of the door can be secured and the cross-sectional area of the outlet of the front seat floor vent 114 can be secured. As a result, the opening amount of the door can be secured, thereby reducing the width in the vehicle front-rear direction while preventing a reduction in the air volume. In the above, the width in the vehicle front-rear direction is the left-right direction in fig. 4.

The rotary shaft 210 of the hot air bypass door 200 is formed above the outlet of the front seat floor vent 114. That is, the rotary shaft 210 as a pivot is disposed at a higher position than the outlet of the front seat floor vent 114, so that the cross-sectional area of the outlet of the front seat floor vent can be ensured.

Further, the air passing through the lower portion of the heater core 130 is guided by the hot air bypass door 200 and is discharged to the front seat floor vent 114 more smoothly due to the structure in which the rotary shaft 210 is located at the upper portion and the plate member 220 is rotated at the lower portion of the rotary shaft 210. In this structure, the hot wind bypass door 200 does not serve as a resistance body of air, compared to the structure in which the rotation shaft 210 is located at the lower portion of the plate member 220, thereby greatly contributing to securing the air volume.

Plate member 220 is formed to have two surfaces inclined with respect to bent portion 221. With such an inclined structure, it is advantageous to reduce the space of the hot air bypass door not only in the front-rear direction of the vehicle but also in the up-down direction. That is, as shown in fig. 5, plate member 220 includes a 1 st surface 222 extending from rotation axis 210 and a 2 nd surface 223 extending from 1 st surface 222, and bent portion 221 is formed between 1 st surface 222 and 2 nd surface 223. The 1 st and 2 nd surfaces 222 and 223 are formed obliquely at an obtuse angle.

As shown in fig. 6, the hot wind bypass door 200 may be formed in the following structure: the plate member 220 is bent in a right angle shape, or 2 bent portions of the plate member 220 are formed to form 3 planes obliquely, or the plate member 220 extends to both sides of the rotation shaft 210.

The opening direction of the hot air bypass door 200 is configured to be opposite to the air flow direction. That is, the opening direction of the hot air bypass door 200 is a direction toward the heating heat exchanger.

In this way, the opening direction of the hot air bypass door 200 is directed toward the heater core 130, and the closing direction of the hot air bypass door 200 is formed in a direction parallel to the air flow direction, thereby preventing air leakage (Leak) in a state where the hot air bypass passage is closed by the hot air bypass door 200. If the opening direction of the hot air bypass door 200 is opposite to the heater core 130, the closing direction of the hot air bypass door 200 is opposite to the air flowing direction, and the hot air bypass door 200 receives a force in the direction of opening the hot air bypass door 200 by the air pressure in a state of closing the hot air bypass passage, thereby generating air leakage (Leak).

When the hot air bypass door 200 opens the hot air bypass passage maximally, the end of the plate 220 of the hot air bypass door 200 abuts the electric heater 140 or is adjacent to the electric heater 140. In the case of the configuration without the electric heater 140, the hot air bypass door 200 is controlled to rotate such that the end of the plate 220 of the hot air bypass door 200 abuts against the heater core 130 or is adjacent to the heater core 130.

When the hot air bypass door 200 opens the hot air bypass duct, the flow path of the hot air duct P2 is closed, and a part of the air flowing through the hot air duct P2 is guided to the front floor vent 114 side. Therefore, the amount of hot air discharged to the front seat floor vent 114 is increased, and improvement in heating performance can be expected.

The vehicle air conditioner further includes a control unit. The control unit controls the defrosting door 153 and the hot wind bypass door 200 in an interlocking manner. The control unit performs compensation control for the opening amount of the defrost door 153 differently according to the opening or closing condition of the hot wind bypass door 200. In this case, the defroster door 153 and the hot air bypass door 200 are controlled in conjunction with the control unit by separate links or by separate actuators.

Specifically, the control unit controls the hot air bypass door 200 to open the hot air bypass passage only when both the driver's seat and the passenger's seat are in the maximum heating state and both the driver's seat and the passenger's seat are in the front floor mode. More specifically, when the hot air bypass door 200 is opened, the control unit controls the opening degree of the defrosting door to be larger than that in the case of the closed condition.

When the hot air bypass door 200 is opened, the hot air bypass door 200 blocks a part of the air flow path of the hot air path P2, and thus the amount of air discharged to the side of the defrost vent 112 decreases. Therefore, when the hot air bypass door 200 is opened, the control unit controls the opening amount compensation on the side of the defrost vent 112 to be larger, thereby making it possible to compensate for the decrease in the air volume discharged to the defrost vent 112.

[ TABLE 1 ]

Air conditioning mode	Defrost door opening amount	Hot air bypass door state
			1 st front seat floor mode	A	Open (Open)
2 nd front seat floor mode	B	Close (Close)

Referring to table 1, the 1 st front floor mode is a case where the driver's seat temperature adjustment door and the passenger's seat temperature adjustment door are both in the maximum heating zone, and at the same time, the driver's seat and the passenger's seat are both in the front floor mode. In the 1 st front floor mode, the hot air bypass door 200 is opened, and the opening amount of the defrost door is set to a. On the other hand, the case where the 2 nd front seat floor pattern is not the 1 st front seat floor pattern corresponds to the case where any of the following cases is not satisfied: firstly, a temperature adjusting door of a driver seat is in a maximum heating interval; secondly, the temperature adjusting door of the front passenger seat is in the maximum heating interval; thirdly, the driver seat is in a front seat floor mode; fourthly, the front passenger seat is in a front seat floor mode. In the 2 nd front floor mode, the hot air bypass door 200 is closed, and the opening amount of the defrost door is set to B. In this case, the opening amount a of the defroster door when the hot air bypass door is opened is larger than the opening amount B of the defroster door when the hot air bypass door is closed. If the specification of the defrosting vent air volume distribution when the hot wind bypass door 200 is opened satisfies within ± 5%, the values of a and B may be the same value.

For example, as shown in fig. 7, when the hot air bypass door 200 closes the hot air bypass passage, the air passing through the heater core 130 is discharged to the front seat blowing surface vent 113, and a part of the air is discharged to the defrost vent 112. As shown in fig. 8, when the hot air bypass door 200 opens the hot air bypass passage, the air passing through the heater core 130 is directly discharged to the front seat floor vent 114, and a part of the air is discharged to the defrost vent 112. In this case, the rear seat is operated by the 1 st rear seat temperature adjustment door 172 in the maximum heating state, and the rear seat mode door 158 opens the rear seat floor vent 116. The opening amount of the defrost door 113 in fig. 8 is larger than that of the defrost door 113 in fig. 7.

On the other hand, fig. 9 is a sectional view showing a vehicle air conditioner according to another embodiment of the present invention, fig. 10 is a sectional view showing a part of fig. 9 in an enlarged manner, and fig. 11 and 12 are sectional views showing an operation example of fig. 10.

Referring to fig. 9 to 12, the air conditioner for a vehicle according to another embodiment of the present invention includes an air conditioning case 110, an evaporator 120, a heater core 130, an electric heater 140, a hot air bypass passage, and a hot air bypass door 200. In this embodiment, a description of a portion overlapping with the structure described in the above embodiment is omitted, and only a structure different from the above embodiment will be described in detail.

The hot air bypass door 200 is composed of a rotary shaft 210 and a plate member 220, and the plate member 220 is formed with a bent portion 221 so as to have at least two surfaces. Further, a passage facing the front seat floor vent is formed in the air conditioning case 110, and the partition 119 divides the hot air passage P2 and the passage facing the front seat floor vent. The partition 119 is formed to extend substantially vertically, and a passage between the partition 119 and the rear surface 118 of the air conditioning casing 110 toward the front seat floor vent is formed to have a relatively constant width.

The passage toward the front seat floor vent is constituted by the 1 st passage W1 and the 2 nd passage W2. The 1 st pathway W1 is formed upstream with reference to the rotation axis 210 of the hot air bypass door 200, and the 2 nd pathway W2 is formed downstream with reference to the rotation axis 210 of the hot air bypass door 200. The 2 nd passage W2 has a larger sectional area than the 1 st passage W1.

Specifically, the rotary shaft 210 of the hot air bypass door 200 is located above the center of the heating heat exchanger in the height direction. That is, the rotary shaft 210 of the hot air bypass door 200 is located above the center line C of the heater core 130 and the electric heater 140. Meanwhile, the front seat floor vent 114 is located lower than the center line C of the heating heat exchanger in the height direction.

With this configuration, the air passing through the heater core 130 and the electric heater 140 flows linearly toward the outlet side of the front seat floor vent 114, and the amount of air discharged to the front seat floor vent 114 can be increased.

More specifically, the partition 119 is composed of a 1 st partition 1191 partitioning the hot air path P2 and the 1 st path W1, and a 2 nd partition 1192 partitioning the hot air path P2 and the 2 nd path W2. A width t2 between the rear surface 118 of the air-conditioning case 110 and the 2 nd partition wall 1192 is wider than a width t1 between the rear surface 118 of the air-conditioning case 110 and the 1 st partition wall 1191. The front seat floor vent 114 is formed at the 2 nd passage W2.

The hot air bypass door 200 is formed with the bent portion 221 to form a step, so that the sectional area of the 2 nd duct W2 can be made larger than the sectional area of the 1 st duct W1, and the outlet port of the front seat floor vent 114 can be ensured to be widest. Since the cross-sectional area of the passage toward the front seat floor vent is increased at the discharge port of the front seat floor vent 114, the size of the discharge port of the front seat floor vent 114 can be made larger than the case where the passage toward the front seat floor vent has a constant cross-sectional area. Therefore, the amount of hot air discharged to the front seat floor vent 114 can be increased, and the heating performance can be improved.

Further, by disposing the rotary shaft 210 of the hot air bypass door 200 above the front seat floor vent 114 while providing the bent portion 221, the width of the air conditioning case 110 in the vehicle longitudinal direction can be reduced while securing the outlet cross-sectional area of the front seat floor vent 114. That is, as shown in fig. 9, the rear surface 118 of the air conditioning case 110 is reduced in size to the left (in the vehicle front direction or the vehicle inside direction) to achieve a compact design of the air conditioning case.

The hot air bypass door 200 is provided with a rigidity reinforcing rib 250. The rigidity reinforcing rib 250 is formed on the opposite side of the air inflow portion of the hot wind bypass passage. That is, the rigidity reinforcing rib 250 is formed inside the bent portion 221 of the hot air bypass door 200, and connects the 1 st surface and the 2 nd surface of the plate. In this way, the rigidity-enhancing rib 250 is formed inside the hot air bypass door 200, thereby enhancing rigidity while not protruding the rigidity-enhancing rib 250 in the air flow path, thereby minimizing obstruction of air flow.

On the other hand, fig. 13 is a sectional view showing a part of an air conditioner for a vehicle according to still another embodiment of the present invention, and fig. 14 is a sectional view showing an operation example of fig. 13.

Referring to fig. 13 and 14, a stopper 290 is formed on the rotary shaft 210 of the hot air bypass door 200. Stopper 290 performs sealing with air conditioning casing 110, is made of a soft material such as rubber, and is formed to protrude in the radial direction from rotary shaft 210. The stopper 290 is closely attached to the partition wall 119 that divides the hot air passage from the front seat floor vent to perform a stopper function that limits the rotation angle of the hot air bypass door 200 and simultaneously performs a sealing function.

The stopper 290 is formed on the opposite side of the air inflow portion of the hot wind bypass passage and does not protrude in the air passage. Meanwhile, a step 1195 is formed in the partition wall 119 that divides the hot air passage and the front seat floor vent. A step 1195 is formed obliquely to an end 1196 of the partition wall 119. By the step 1195, the width of the passage toward the front seat floor vent becomes wider as it gets closer to the lower portion from the upper portion. The stepped portion 1195 provides a space for installing the stopper 290 when the hot wind bypass door 200 is rotated.

With such a structure, the stopper function and the smooth sealing function of the hot wind bypass door 200 are performed, and the stopper 290 is provided with a structure not protruding so as not to obstruct the flow of air in the passage. Meanwhile, the stopper 290 does not protrude in the air passage due to the structure of the stepped portion 1195, and thus, interference with the partition 119 of the air-conditioning case is not generated, and a concentrated design can be achieved.

The air conditioner for a vehicle according to the present invention has been described above with reference to the embodiments shown in the drawings, but these are merely examples, and those skilled in the art will understand that other embodiments can be modified variously and equally. Therefore, the true technical scope should be determined according to the technical idea of the appended claims.