KR20070068567A - Air conditioner for vehicle with two layer air flow - Google Patents

Abstract

A vehicle air conditioner with two-layered air flow is provided to prevent flow of outside air through a floor vent for increasing heating efficiency for air suction in a two-layered air flow floor-heating mode, and operate doors for separating air flow in the two-layered structure in association for easy conversion of various air conditioning modes. A vehicle air conditioner with two-layered air flow comprises a casing(220) formed with an inlet defined in the vertical direction, and mounted with a defrost vent(230), a face vent(232), and a floor vent(234) at outlets respectively to be controlled by mode doors respectively. An evaporator(200) and a heater core(210) are mounted in the casing for cooling and heating air respectively. A cold air control door(240) controls opening degrees of a cold air path(P1) and a hot air path(P2). A first two-layered air flow door(242) is mounted between a lower part of the evaporator and the heater core for defining inside and outside air paths in a two-layered air mode. A second two-layered air flow door(244) controls an air volume in the vertical direction at a lower part of the heater core and controls an opening degree of an outlet for the hot air path. A hot air control door(248) controls an opening degree of a connection path(246) connected to a lower part of the heater core and the floor vent in association with the first and second two-layered air flow doors. At least two of the first and second two-layered air flow doors and the hot air control door for floor are operate in association.

Description

Vehicle Double-Layer Air Conditioning Device {AIR CONDITIONER FOR VEHICLE WITH TWO LAYER AIR FLOW}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing an example of a conventional double-flow air conditioner for a vehicle, showing a state when a double-flow heating mixed mode (Mix Mode) is operated.

2 is a cross-sectional view showing an example of a conventional double-layer air conditioner for a vehicle, showing a state when a general maximum heating mode is operated.

3 is a cross-sectional view showing an example of a conventional double-layer air conditioner for a vehicle, showing a state when a double-flow heating floor mode is operated.

4 is a cross-sectional view showing an example of a conventional two-layer air conditioner for vehicles, and is a view for explaining an interlocking state of doors for temperature control.

5 is a cross-sectional view showing an example of a two-layer air conditioner for vehicles according to the present invention, which is a view showing a state when a general maximum cooling mode is operated.

Fig. 6 is a cross-sectional view showing an example of a double-flow air conditioner for vehicles according to the present invention, showing a state when a general maximum heating mode is activated.

7 is a view showing a state in which the opening degree of the downstream of the heater core is adjusted when the vehicle double flow air conditioner according to the present invention is operated in the normal maximum heating mode.

8 is a cross-sectional view showing an example of a double-flow air conditioner for vehicles according to the present invention, showing a state when the double-flow heating mix mode is operated.

9 is a cross-sectional view showing an example of a double-flow air conditioner for vehicles according to the present invention, showing a state when the double-flow heating floor mode is operated.

10 is a cross-sectional view showing an example of a blower applied to a two-layer air conditioner for vehicles according to the present invention.

<Explanation of symbols for the main parts of the drawings>

200: evaporator, 210: heater core,

220: air conditioning case, 222: entrance of the air conditioning case,

230: Defrost Vent,

230d, 232d, 234d: Mode Door,

232: Face Vent, 234: Floor Vent,

234f: Floor vent for front seat, 234r: Floor vent for rear seat,

240: cold air control door, 242: first two-layer flow door,

244: second two-flow door, 246: communication path,

248: warmth control door, P1: cold air passage,

P2: Warm passage.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-layer air conditioner for a vehicle, and in particular, the cold air passage is closed, the inlet of the defrost vent is opened, and the floor vent is warm in a state in which the inlet of the floor vent is closed. When the two-flow heating floor mode is operated in a two-flow air suction mode through which passages are separated and blown by internal / external air, the heating performance can be improved by preventing external air from flowing through the floor vents. By interlocking the doors to separate the air flow path into the two-layer flow in the air conditioning case, the present invention relates to a vehicle double-flow air conditioner that can be easily switched by applying various air conditioning modes.

The vehicle air conditioner includes a cooling system for cooling the interior of a vehicle and a heating system for heating the interior of the vehicle. The cooling system is blown by heat exchange between a refrigerant circulated back to the compressor through a condenser, a receiver dryer, an expansion valve, and an evaporator by driving a compressor, and a blower air passing through the evaporator surface by a blower. It is configured to cool the interior of the vehicle by causing the air to turn into cold and discharge the interior of the vehicle. In addition, the heating system is configured to heat the vehicle interior by introducing cooling water into a heater core and exchanging heat with the blowing air.

On the other hand, interest in hybrid vehicles is gradually increasing due to the regulation of the automobile environment of each country and improvement of fuel economy. Among the hybrid vehicles, hybrid electric vehicles, which are common among the hybrid vehicles, use an engine and an electric motor. Drive at a stop or when driving at low speed. In such a hybrid vehicle, if the engine efficiency is increased and the engine operating time is reduced, the cooling water is heated by the heat of the engine, and a sufficient heating effect can be obtained when the interior of the vehicle is heated by using an existing air conditioner. none.

In addition, in the general air conditioner, when only the outside air is blown into the room through the outside air inlet in the full cooling mode, the load of the compressor becomes large and fuel loss is large. In addition, when only the bet is circulated through the bet suction port, the air in the vehicle interior is contaminated to harm the health of the occupant. In addition, when the intake door of the blower is placed in a neutral position and internal / external air is supplied together, internal / external air is mixed in the air flow path of the air conditioning case, so that the passengers do not feel the fresh feeling of the external air. When the bet is discharged toward the windshield, fogging occurs on the windshield, which causes trouble in driving.

In consideration of the problems described above, two-flow air conditioners have been proposed that can separate the internal and external air and supply them to the vehicle interior, and examples thereof include those disclosed in Japanese Patent Laid-Open No. H10-338019.

As shown in FIG. 1, the two-flow air conditioner includes a defrost vent having an inlet 32 vertically partitioned and having an opening degree controlled by each mode door 40d, 42d, 44d. An air conditioning case 30 having a defrost vent 40, a face vent 42, and a floor vent 44 installed at an outlet; An evaporator (10) embedded in the air conditioning case (30) to cool the air; A heater core 20 embedded in the air conditioning case 30 to heat air; A cold air control door 50 for adjusting the opening degree of the cold air passage P1 and the warm air passage P2 of the air conditioning case 30; A first two-stage flow door (52) for controlling the amount of air up and down with respect to the heater core (20) downstream of the evaporator (10); And a second two-layer flow door 54 for adjusting the amount of air up and down downstream of the heater core 20 and for controlling the opening degree of the communication path 56 communicating with the floor vent 44. . The defrost vent 40 is provided for discharging air toward the windshield, the face vent 42 is provided for discharging air toward the occupant's face, and the floor vent 44 provides air to the occupant's foot. To discharge. In addition, the inlet 32 of the air conditioning case 30 may be blown to the lower flow path of the air conditioning case 30 and the outside air may be separated and blown to the upper flow path of the air conditioning case 30 corresponding to the partition structure. A two-flow blower (not shown) is installed. In addition, the floor vent 44 may be partitioned into a floor vent 44f for the front seat and a floor vent 44r for communicating with the floor vent 44f for the front seat. In Fig. 1, reference numeral 34 denotes a separating plate that divides the inlet 32 of the air conditioning case 30 up and down, and reference numeral 22 denotes an auxiliary electric heater which can be operated when heating is insufficient, for example, MZ. An air mixing zone, which is a region where cold and warm air are mixed, is shown.

In the conventional vehicle double-flow air conditioner configured as described above, for example, the double-flow heating mix mode (Mix Mode) is operated as shown in FIG.

That is, when the two-flow heating mix mode is activated, the cold air passage (P1) is closed, the upstream and downstream of the heater core 20 is divided up and down, the inlet of the defrost vent 40 is opened, the floor The vent 44 communicates with the warm passage P2 in a closed state, and a two-layer air intake mode in which internal / external air is separated and blown is performed. At this time, the first two-flow flow door 52 is placed in a position that divides the flow path between the evaporator 10 and the heater core 20 up and down in two, and the second two-flow flow door 54 is the heater core 20. 2) it is placed in a position to open the communication path 56 while dividing the downstream up and down.

Accordingly, when the two-flow heating mix mode is activated, the outside air blown by the two-flow blower not shown is directed toward the upper half of the heater core 20 through the upper half of the evaporator 10 and the upper half of the downstream of the evaporator 10. By the flow, the heater core 20 is exchanged with the cooling water flowing in the heater to change to warmth. The warmth is discharged to the windshield of the vehicle interior through the defrost vent 40 through the upper half of the downstream of the heater core 20, thereby heating the vehicle interior and defogging the windshield.

In addition, the bet blown by the two-flow blower flows toward the lower half of the heater core 20 through the lower half of the evaporator 10 and the lower portion of the downstream of the evaporator 10, thereby cooling water flowing in the heater core 20 and Heat exchanged to warmth. Since the communication path 56 is open, the warmth may be discharged toward the occupant's foot via the communication path 56 and the floor vent 44, and thus heating of the vehicle interior may be performed.

That is, the defogging action may be performed by discharging dry air toward the windshield, and the hot air passage P2 and the floor vent 44 may be opened by opening the communication passage 56 even when the floor vent 44 is closed. Thus, only the bet is discharged toward the occupant's foot, thereby improving heating performance.

On the other hand, as shown in FIG. 2, when the normal maximum heating mode in which all the air is blown toward the heater core 210 is operated while the cold air passage P1 is completely closed, for example, the first two-flow door ( 52 is located at a position that divides the flow path between the evaporator 10 and the heater core 20 up and down in two. In addition, the communication path 56 is closed by the second double flow door 54.

Therefore, the air blown by the two-layer blower not shown flows through the upper half of the evaporator 10 and the lower half of the evaporator 10 toward the upper half and the lower half of the heater core 20, respectively, thereby heating the heater core 20. Heat exchanged with the cooling water flowing inside to change the warmth. The warm air is mixed while passing downstream of the heater core 20, and the mixed air flows into the air mixing region MZ, and the vent is opened according to a predetermined air discharge mode among the vents 40, 42, and 44. By being discharged to the vehicle interior through the heating of the vehicle interior is performed.

By the way, by the way, when the vehicle double-flow air conditioner configured as described above is operated in the double-flow heating floor mode, for example, as shown in Fig. 2, the following functions.

That is, when the two-flow heating floor mode is activated, the cold air passage (P1) is closed, the upstream and downstream of the heater core 20 is divided up and down, the defrost vent 40 and the floor vent 44 is Each inlet is partially open, the floor vent 44 is in communication with the warm passage (P2), the two-layer air intake mode is performed in which the internal / external air is separated and blown.

Accordingly, a part of the outside air passing through the upper half of the heater core 20 flows to the floor vent 44 through the air mixing region MZ, and the bet passing through the lower half of the heater core 20 is passed through the communication path 56. Since it flows to the floor vent 44, a problem occurs in that outside air is mixed with the bet in the floor vent 44. As such, when the outside air is mixed with the inside air in the floor vent 44, the temperature of the inside air is lowered due to the outside air, resulting in a problem that the heating performance is lowered.

In addition, in the conventional two-layer air conditioner for a vehicle, for example, in order to control the temperature in the state of FIGS. 1 to 3, the cold air control door 50 operates to open the cold air passage P1 or cools the air. When operating in the mode to adjust the opening degree of the cold air passage (P1), in conjunction with the cold air control door 50 so that the first double-flow flow door 52 also operates at the same angle of rotation as the cold air control door (50) It is.

For this reason, it is difficult to adjust the air volume for the cold air passage (P1) and the warm air passage (P2). For example, when adjusting the temperature in the 1/2 cooling mode, as shown in Figure 4, because the air flows more air volume than the air flow to the cold passage (P1) flows into the warm passage (P2), the problem of low cooling efficiency There is this.

In addition, as described above, when the cold air control door 50 and the first double flow door 52 is interlocked, the operation structure according to the mode of the second double flow door 54 in various ways in conjunction with the operation thereof. Difficult to apply, there is a problem that can not effectively switch various air conditioning modes.

The present invention has been made in view of the above-described conventional problems, and the cold air passage is closed, the inlet of the defrost vent is opened, the floor vent is in communication with the warm passage in a state in which the inlet of the floor vent is closed, and internal / external air. When the two-flow heating floor mode is operated in the two-flow air intake mode in which the air is separated and blown, the outside air is prevented from flowing to the floor vent to increase heating performance, and the air flow path is separated into the two-flow flow inside the air conditioning case. By interlocking the doors, an object of the present invention is to provide a two-layer air conditioner for a vehicle that can be easily switched by applying various air conditioning modes.

In order to achieve the above object, the two-layer air-conditioning device for a vehicle according to the present invention, the inlet side is partitioned up and down, the air-conditioning is installed in the outlet, the defrost vent, the face vent and the floor vent that the opening degree is adjusted by each mode door A case; An evaporator embedded in the air conditioning case to cool the air; A heater core embedded in the air conditioning case and heating air; A cold air regulating door configured to adjust an opening degree of the cold air passage and the warm air passage inlet of the air conditioning case; A first two-flow flow door disposed between the downstream side of the evaporator and the heater core to partition the internal air flow path and the external air flow path in the two-laminar flow mode; A second two-flow flow door interlocking with the first two-flow flow door to adjust the amount of air up and down downstream of the heater core and to control the opening degree of the hot air passage; And, in conjunction with the first double-flow door and the second double-flow door, a floor warmth control door for adjusting the opening degree of the communication path communicating with the lower half of the heater core downstream and the floor vent; At least two doors of the first double flow door, the second double flow door and the floor warming door may be installed to interlock with each other.

Preferably, the first two-flow flow door is installed to maintain the closed state with respect to the inlet of the warm passage, and to open the inlet of the warm passage when the maximum heating mode in which the cold air passage is completely closed is operated. .

In addition, when the two-flow air intake mode in which the internal / external air is blown out is operated, the first two-flow flow door is installed to open the inlet of the warm passage, and the second two-flow flow door is connected to the heater core. It is preferable to be provided to partition the downstream up and down.

In addition, the second double-flow flow door is installed to maintain a predetermined opening without completely opening the flow path downstream of the heater core when the maximum heating mode in which the blowing air flows only in the warm passage of the heater core is operated. It is desirable to be.

In addition, the floor warming control door for the floor, the cold air passage is closed, the inlet of the defrost vent is opened, the floor vent is in communication with the warm passage in the state in which the inlet of the floor vent is closed, the internal and external air is separated When the two-flow heating mix mode is operated in the two-flow air suction mode to be blown, it is preferable that the communication path is installed to open the communication path in a predetermined opening degree in cooperation with the second two-flow flow door.

In addition, the warmth control door for the floor, when the two-flow heating floor mode is operated on the condition that the inlet opening degree of the defrost vent is smaller than when the two-flow heating mix mode is operated, the communication path is It is preferable to be installed so as to open more than when the two-flow heating mix mode.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are based on the principle that the inventor can appropriately define the concept of terms in order to explain the invention in the best way. It should be interpreted as meanings and concepts corresponding to

5 to 9, there is shown a vehicle double-flow air conditioner according to the present invention.

The two-layer air conditioner for a vehicle according to the present invention includes an air conditioner case 220, an evaporator 200 and a heater core 210 embedded in the air conditioner case 220, and an inlet 222 of the air conditioner case 220. It is provided with a two-flow blower 100 (see Fig. 10) installed in.

The inlet 222 of the air conditioning case 220 is divided up and down by the separating plate 224. Corresponding to the vertical partition structure of the air conditioning case 220, the double-flow blower 100 also has a vertical partition structure.

The two-flow blower 100, as shown in FIG. 10, has a double suction type scroll case 110 partitioned up and down by a separator plate 112, and the separator plate 112. Opening of the double suction type blowing fan 120, the motor 130 for rotating the double suction type blowing fan 120, and the intake door 146 penetrating through the double suction type scroll case 110. Intake ducts that suck the inside and outside air through the inside and outside air intake 142 and the outside air intake 144, and separate the inside and the outside air to guide the upper and lower sides of the double suction type scroll case 110 ( Intake Duct 140). Reference numeral 150 indicates that when the end of the intake door 146 is in contact with the turn, the outside air is directed to the upper half of the double-suction scroll case 110, the bet is toward the lower half of the two suction-type scroll case 110. Baffle for guiding is shown.

Accordingly, a discharge port (not shown) divided up and down of the double suction type scroll case 110 is connected to the inlet 222 of the air conditioning case 220, and the intake door 146 is positioned at the position of the baffle 150. In a state in which the double flow blower 100 is driven, the outside air flows toward the upper half of the air conditioning case 220, and the bet flows toward the lower half of the air conditioning case 220.

On the other hand, at the exit of the air conditioning case 220, the defrost vent 230, the face vent 232 and the floor vent 234, in which the opening degree is adjusted by the respective mode doors 230d, 232d, and 234d, are sequentially installed. It is.

The defrost vent 230 is provided for discharging air toward the windshield to prevent fogging from occurring on the windshield, and the face vent 232 is provided for discharging air toward the face of the occupant, and the floor vent 234 is provided to discharge air toward the occupant's foot.

The floor vent 234 may be branched into a front seat vent 234f and a rear seat vent 234r communicating with the front seat vent 234f.

The evaporator 200 heat-exchanges the air flowing from the refrigerant flowing through the double-flow blower 100 and the refrigerant flowing inside the air-condensing case 220, which is built in the rear side of the separation plate 224 at the inlet side. Function to make it.

In addition, the heater core 210 is installed on the downstream side of the evaporator 200 to heat-exchange the air passing through the evaporator 200 and the cooling water flowing therein, thereby functioning to heat the air. Reference numeral 212 denotes an auxiliary electric heater which can be operated, for example, when heating is insufficient.

The air flow path downstream of the evaporator 200 may be divided into a cold air passage (P1) bypassing the heater core 210 and a warm air passage (P2) toward the heater core 210, the cold air passage ( The air passing through P1) and the warm passage P2 may be mixed in the air mixing region MZ adjacent to the inlets of the vents 230, 232, and 234.

On the other hand, to control the opening degree of the cold air passage (P1) and the warm passage (P2) inlet of the air conditioning case 220, the cold air control door 240 is installed in the air conditioning case 220.

In addition, the heater passage 210 is installed between the downstream of the evaporator 200 and the heater core 210 so that the warm passage (P2) in which the heater core 210 is installed can be converted into a two-layer flow structure, two-laminar flow mode A first two-layer flow door 242 for dividing the city air passage and the outside air passage, and a second air flow adjusting the amount of air flow up and down in the downstream of the heater core 210, and the outlet opening of the warm passage P2. Two-layer flow door 244 is provided in the air conditioning case 220, respectively.

In addition, the partition wall 245 partitioning the downstream of the heater core 210 and the floor vent 234 in the warm passage P2 is provided with the lower half of the heater core 210 downstream and the floor vent 234. A communication path 246 for communicating is installed, and the opening degree of the communication path 246 is adjusted by the warmth adjusting door 248 for the floor.

At least two doors of the first double flow door 242, the second double flow door 244, and the warmth control door 248 for the floor are, for example, one cam mechanism using a cam plate. (Cam Mechanism) (not shown) can operate in conjunction with each other. For example, apart from the first double flow door 242, the second double flow door 244 and the floor warming control door 248 may operate in conjunction with each other by one cam mechanism.

In addition, the first double-flow flow door 242 is kept closed with respect to the inlet of the warm passage (P2), for example, as shown in Figure 5, the cold air passage (P1) is completely closed and the air blower air passage When the maximum heating mode which flows only into P2 is activated, it may be installed to open the inlet of the warm passage P2, for example, as shown in FIG. In addition, the second two-layer flow door 244 acts as a flow resistance downstream of the heater core 210 to increase the heat exchange between the blower air and the heater core 210, thereby further increasing the temperature of the air, When the maximum heating mode is operated as shown in FIG. 7, the second two-flow door 244 is preferably installed to maintain a predetermined opening degree without completely opening the flow path downstream of the heater core 210. .

In addition, when the two-flow air intake mode in which the internal / external air is blown separately is operated, the first two-flow flow door 242 opens the inlet of the warm passage P2 as shown in FIGS. 8 and 9. The second bi-flow door 244 may be operated to partition the downstream of the heater core 210 up and down as shown in FIGS. 8 and 9.

In addition, the floor warming control door 248, for example, as shown in Figure 8, the cold air passage (P1) is closed and the inlet of the defrost vent 230 is opened, the inlet of the floor vent 234 Is closed, the sang floor vent 234 is in communication with the warm passage (P2), when the two-flow heating mix mode in which the internal / external air is separated and blown is operated, the second two-flow door 244 and In cooperation with each other, the communication path 246 may be operated to open at a predetermined opening degree, for example, 1/2 or more opening degrees.

In addition, as shown in FIG. 9, when the inflow opening of the defrost vent 230 is operated under a condition that the opening degree of the defrost vent 230 is smaller than that in the case of the operation of the two-flow heating mix mode, the The floor warming control door 248 may operate to open the communication passage 246 more openly (eg, fully open) than in the two-flow heating mix mode.

In addition, the floor mode door 234d for adjusting the opening degree of the floor vent 234 may be configured to provide an inlet of the floor vent 234 when the two-flow heating mix mode and the two-flow heating floor mode are operated. May be operable to be fully closed.

Therefore, when the two-flow heating mix mode as shown in FIG. 8 or the heating floor mode as shown in FIG. 9 is operated, the cold air passage P1 is closed by the cold air adjusting door 240. The inlet of the floor vent 234 is closed by the floor mode door 234d, and the upstream and downstream sides of the heater core 210 are closed by the first double flow door 242 and the second double flow door 244. It is partitioned up and down, the communication path 246 is opened by the warmth control door 248 for the floor, the double-flow blower 100 is suctioned at the same time to the inside / outside air to separate the air conditioning case 220 and blow Is driven in a two-layer air intake mode. In addition, in the case of the two-flow heating mix mode, the communication path 246 is opened at a predetermined opening, for example, 1/2 or more, and completely opened in the case of the two-flow heating floor mode. Further, in the case of the defrost vent 230, the inlet opening degree becomes smaller when the two-flow heating floor mode is operated as compared to the two-flow heating mix mode.

In this case, the outside air sucked through the outside air inlet 144 of the two-flow blower 100 may include an upper half of the double-suction scroll case 110, an upper half of the evaporator 200, and the first double flow door 242. Flow through the upper half of the heater core 210 to the upper portion. The outside air is heated by heat exchange while passing through the heater core 210 to the warmer, and the warmer flows through the upper portion of the second bilayer flow door 244 to the air mixing region MZ, and vents Discharges into the vehicle interior through the open vents 230, 232, and 234 to function as defogging and heating.

In addition, the bet sucked through the air intake 142 of the double flow blower 100 may include a lower half of the double-suction scroll case 110, a lower half of the evaporator 200, and a lower portion of the first double flow door 242. It flows through the lower half of the heater core 210 through. The bet is heated by heat exchange while passing through the lower half of the heater core 210, and the warmer is discharged into the vehicle interior through the bottom of the second double-flow flow door 244 and the floor vent 234 to provide heating. It will function.

Next, the operation of the vehicle double-flow air conditioner according to the present invention configured as described above will be described.

<Normal maximum cooling mode>

As shown in FIG. 5, when the normal maximum cooling mode in which the warm passage P2 is completely closed is operated, the double-flow blower 100 selectively sucks inside or outside air, thereby The inlet 222 is operated in the air suction mode of the air suction mode or the external air suction mode to blow to the upper and lower half of the evaporator 200.

In addition, the warm air passage (P2) is closed by the cold air control door 240, in this case the cold air passage (P1) is opened to the maximum. In addition, the first two-layer flow door 242 operates to close the inlet of the warm passage P2. In cooperation with the first double flow door 242, the second double flow door 244 operates such that upper and lower halves downstream of the heater core 210 communicate with each other. In addition, in conjunction with the second two-layer flow door 244, the floor warming control door 248 operates to close the communication path 246. In addition, the vents 230, 232, and 234 have their openings adjusted according to a predetermined air discharge mode.

Therefore, the air blown to the upper and lower half of the evaporator 200 by the two-flow blower 100, the heat exchanged with the refrigerant flowing through the inside of the evaporator 200 while passing through the evaporator 200 is changed to cold, The cold air flows to the air mixing region MZ through the cold air passage P1 and is then discharged into the vehicle interior through an open vent, thereby cooling the vehicle interior.

As such, when the normal maximum cooling mode is operated, when the cold air control door 240 operates at the position of the middle dashed lines for temperature control, the first two-flow flow door 242 is the inlet of the warm passage P2. It will remain closed. Therefore, a part of the air passing through the evaporator 200 is heated while passing through the heater core 210 through the warm passage P2 which is partially opened by the cold air control door 240, and then the air mixing region MZ. Since it is mixed with the cold air flowing through the cold passage (P1), the temperature of the air can be effectively controlled.

<Normal maximum heating mode>

As shown in FIG. 6, when the normal maximum heating mode in which the cold air passage P1 is completely closed is operated, the double-flow blower 100 selectively sucks inside or outside air to inlet the air conditioning case 220. It is operated in the air suction mode of the air suction mode or the external air suction mode to blow to the upper half and the lower half of the evaporator 200 through the (222). In addition, the operation of the cooling cycle through the evaporator 200 is stopped.

In addition, the cold air passage (P1) is closed by the cold air control door 240, in this case the inlet of the warm passage (P2) is opened to the maximum. In addition, the first two-layer flow door 242 operates to open the inlet of the warm passage (P2), thereby partitioning the flow path between the evaporator 200 and the heater core 210 into two layers. In cooperation with the first double flow door 242, the second double flow door 244 operates such that upper and lower halves downstream of the heater core 210 communicate with each other. In addition, in conjunction with the second two-layer flow door 244, the floor warming control door 248 operates to close the communication path 246. In addition, the vents 230, 232, and 234 have their openings adjusted according to a predetermined air discharge mode.

Accordingly, the air blown to the upper and lower half of the evaporator 200 by the two-flow blower 100 is heated by the first two-layer flow door 242 through the evaporator 200 in a two-layer flow structure. Flow 210). The air flowing toward the heater core 210 in the two-layer flow structure is heat-exchanged with the coolant flowing through the heater core 210 while passing through the heater core 210 and then downstream of the heater core 210. While flowing in the air mixing region (MZ) while being mixed in, and discharged to the vehicle interior through the open vent, heating of the vehicle interior is performed.

<Two-layer heating mix mode>

8 shows a state when the two-flow heating mix mode is activated, in which case the cold air passage P1 is closed, the inlet of the defrost vent 230 is opened, and the top of the heater core 210 is opened. The downstream is partitioned up and down, and each inlet of face vent 232 and floor vent 234 is closed. In addition, the communication path 246 is opened by the floor warmth adjusting door 248, whereby the warm path P2 and the floor vent 234 communicate with each other. The communication path 246 is opened to a predetermined opening degree, for example 1/2 degree or more. In addition, the two-flow blower 100 is driven in a two-flow air suction mode in which the intake door 146 pivots to the position of the baffle 150 to simultaneously suck internal / external air and separate and blow the air into the air conditioning case 220. .

As described above, when the two-flow heating mix mode is activated, the outside air sucked through the outside air inlet 144 of the two-flow blower 100 is the upper half of the double-suction scroll case 110, the evaporator 200. And flows toward the upper half of the first two-laminar flow door 242 to the upper half of the heater core 210 and is heated by heat exchange to warmth, and the warmth is transferred to the upper portion of the second two-laminar flow door 244. Flow through the air mixing region (MZ) through the defrost vent 230 is discharged toward the windshield of the vehicle interior is used for defogging of the windshield and heating of the vehicle interior. That is, since the dry outside air is discharged toward the windshield, the defogging action of the windshield can be performed smoothly.

In addition, the bet sucked through the air intake 142 of the double flow blower 100 may include a lower half of the double-suction scroll case 110, a lower half of the evaporator 200, and a lower portion of the first double flow door 242. It flows toward the lower half of the heater core 210 through the heat exchanger to be heated by heat exchange to the warmth, the warmth is the vehicle interior through the lower portion of the second double-flow flow door 244, the communication path 246 and the floor vent 234 Is discharged to function as heating.

That is, outside air is not mixed with the bet that flows to the floor vent 234 and is discharged toward the foot of the passenger in the vehicle interior. Therefore, only the pure bet is heated and discharged toward the passenger's foot, whereby the heating performance of the vehicle interior can be improved.

<2nd floor heating floor mode>

When the two-flow heating floor mode is activated, as shown in FIG. 9, the opening degree of the defrost vent 230 is reduced as compared to when the two-flow heating mix mode is activated. In this case, the communication path 246 is completely opened by the floor warmth adjusting door 248.

Accordingly, the outside air passing through the upper half of the heater core 210 flows to the air mixing region MZ and is discharged to the vehicle window of the vehicle interior through the defrost vent 230, and is heated through the lower half of the heater core 210. The bet may be discharged toward the passenger's foot through the lower portion of the second double flow door 244, the communication path 246 and the floor vent 234.

Also in this case, as in the case of the two-flow heating mix mode, outside air is not mixed with the bet flowing in the floor vent 234, only pure bet is heated and discharged toward the passenger's foot, and the communication path 246 When a sufficient amount of air is discharged to the vehicle interior in the fully opened state, the heating performance of the vehicle interior can be improved. That is, since the amount of air discharged through the defrost vent 230 is reduced and the amount of air discharged through the floor vent 234 is increased, the heating effect may be increased, compared to when the two-flow heating mix mode is operated.

According to the vehicle double-flow air conditioner according to the present invention configured as described above, the cold air passage (P1) is closed, the inlet of the defrost vent 230 is opened, the inlet of the floor vent 234 is closed The floor vent 234 communicates with the warm passage P2, and when the two-flow heating floor mode is operated in the two-flow air suction mode in which the internal / external air is separated and blown to the air conditioning case 220, the floor vent ( Since the outside air is not mixed with the bet flowing to 234, only the pure bet is heated to be discharged toward the passenger's foot, and a sufficient amount of air can be discharged to the vehicle interior, thereby improving heating performance of the vehicle interior.

In addition, the doors separating the air flow path into the double flow flow inside the air-conditioning case, such as the first double flow flow door 242, the second double flow flow door 244, and the warmth control door 248 for the floor as one cam mechanism The second double flow door 244 and the floor warming control door 248 operate in conjunction with one mechanism, independently of the first double flow door 242, and the warm air passage (P2). ) And the opening degree of the communication path 246 for communicating the warmth passage (P2) and the floor vent 234 can be adjusted in various ways, it is possible to switch easily by applying various air conditioning modes.

In addition, when the temperature is adjusted by operating the cold air control door 240 in the cooling mode, the air volume distribution for the cold air passage (P1) and the warm air passage (P2) can be properly adjusted by one of the cold air control door (240). , A large amount of air flows into the warm passage (P2) can prevent the phenomenon that the cooling efficiency falls.

Claims (5)

The inlet 222 is divided up and down, and the defrost vent 230, the face vent 232, and the opening degree of which are controlled by the respective mode doors 230d, 232d, and 234d. An air conditioning case 220 having a floor vent 234 installed at an outlet; An evaporator 200 embedded in the air conditioning case to cool the air; A heater core 210 mounted in the air conditioning case to heat air; A cold air control door 240 for adjusting the opening degree of the cold air passage P1 and the warm air passage P2 of the air conditioning case; A first two-layer flow door 242 disposed between the downstream side of the evaporator and the heater core to divide the internal air flow path and the external air flow path in the two-laminar flow mode; A second two-layer flow door 244 for adjusting the air volume up and down in the downstream of the heater core, and for controlling the opening degree of the outlet of the warm passage; And, And a floor warming control door 248 for adjusting the opening degree of the communication path 246 communicating with the lower half of the heater core and the floor vent. At least two doors of the first double-flow flow door, the second double-flow flow door and the floor warmth control door are installed to interlock with each other. The method of claim 1, The first two-flow door 242 continues to be closed with respect to the inlet of the warm passage P2, and the maximum heating mode in which the cold passage P1 is completely closed by the cold control door 240 is operated. When it is, the two-flow air conditioner for a vehicle, characterized in that it is installed to open the inlet of the warm passage. The method of claim 1, When the double-flow air intake mode in which the internal / external air is blown separately is activated, The first double flow door 242 is installed to open the inlet of the warm passage (P2), the second double flow door 244 is installed to partition the downstream of the heater core 210 up and down. Two-layer air-conditioning device for a vehicle, characterized in that. The method of claim 1, The second bi-flow door 244 does not completely open the flow path downstream of the heater core when the maximum heating mode in which the blowing air flows only in the warm passage P2 toward the heater core 210 is operated. A double-flow air conditioner for a vehicle, characterized in that it is installed to maintain a predetermined opening. The method according to claim 1 or 2, The warmth control door 248 for the floor, The cold air passage (P1) is closed, the inlet of the defrost vent 230 is opened, the floor vent is in communication with the warm passage (P2) in the state in which the inlet of the floor vent 234 is closed, When the double-flow heating mix mode is operated in the double-flow air suction mode in which the inside / outdoor air is separated and blown, the communication path 246 is opened in a predetermined opening in cooperation with the second double-flow flow door 244. Installed to When the two-flow heating floor mode is operated under the condition that the inlet opening degree of the defrost vent becomes smaller than when the two-flow heating mix mode is activated, the communication path is opened more than in the two-flow heating mix mode. Two-layer air-conditioning device for a vehicle, characterized in that it is installed.

Images