KR20070068569A - Air conditioner for vehicle with two layer air flow - Google Patents

Abstract

A vehicle air conditioner with two-layered air flow is provided to mount a PTC auxiliary heater core in a shower duct connected to a shower vent for front seats to heat air alternatively, thereby improving heating efficiency for the front seat in a general heating mode, a two-layered air flow heating mode for a floor or a two-layered air flow heating mix mode. A vehicle air conditioner with two-layered air flow includes a PTC(Positive Thermister Coefficient) auxiliary heater core(213) mounted in a shower duct(236) connected to a shower vent(234f) for front seats and extended into a vehicle room for alternatively heating air. Air introduced via a floor vent or a connection path is alternatively heated by the PTC auxiliary heater core to increase heating efficiency for a front seat area in the case of the severe cold.

Description

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

1 is a cross-sectional view showing an example of a conventional two-layer air conditioner for vehicles.

FIG. 2 is a cross-sectional view showing an example when operating in an air conditioning mode different from FIG.

3 is a cross-sectional view showing an example of a vehicle double flow air conditioner according to the present invention.

4 is a schematic perspective view showing an example of a vehicle double flow air conditioner according to the present invention.

5 and 6 are cross-sectional views each showing an example when operating in an air conditioning mode different from FIG. 3.

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

200: evaporator, 210: heater core,

213: PTI auxiliary heater core, 230: Defrost Vent,

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

232: Face Vent,

234f: Shower Vent for the Front Seat,

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

236: shower duct (240), 240: cold air control door,

242: first bi-flow door, 244: second bi-flow door,

246: communication path, 248: warmth adjustment door for floor,

P1: cold passage, P2: warm passage.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-vehicle air conditioner for a vehicle, and in particular, selectively heats air in a shower duct connected to a shower vent for a front seat installed to discharge air toward the bottom of the front seat. By installing a PTC (Positive Thermister Coefficient) auxiliary heater core, the front seats can be operated during normal maximum heating mode, double flow heating floor mode or double flow heating mix mode. The present invention relates to a double-flow air conditioner for vehicles that can improve heating performance.

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, when 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 the inside and the outside air are supplied together, the inside and the outside air are mixed in the air flow path of the air conditioning case so that the passenger cannot feel the fresh feeling of the outside 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-layer 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 divided into a pair of front seat shower vents 44f and 44f and a rear seat vent 44r communicating with the front seat shower vents 44f. .

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 air passing through the heater core 20 when cold weather or heating is insufficient. A first PTC auxiliary heater core installed behind the heater core 20 to selectively heat the heater, and reference numeral 23 denotes the front seat shower vents 44f and the rear seat floor vent 44r among the floor vents 44. And a second PTC auxiliary heater core, which is installed in the area between the two poles and selectively heats the air flowing to the floor vent 44. The PTC auxiliary heater cores, which use PTC elements, are electrically operated. Reference numeral MZ denotes an air mixing zone, which is a region where cold and warm air are mixed.

In the conventional vehicle double-flow air conditioner configured as described above, for example, the bi-flow heating mix mode (Mix Mode) can be 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, and the second double-flow flow door 54 is the heater core 20. The downstream part is divided into two parts, and the communication path 56 is opened.

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, the communication path 56 is closed by, for example, the second double flow door 54, and the inlet of the floor vent 44 is opened by the floor mode door 44d. In the process of operating the heating mode, when the second PTC auxiliary heater core 23 is operated to increase the floor side heating performance of the vehicle, a part of the warm air flowing into the inlet of the floor vent 44 is for the front seat. Discharged through the shower vents 44f toward the bottom of the front seat, and the rest of the warmth is further heated while passing through the second PTC auxiliary heater core 23 to the bottom of the rear seat through the rear seat vent 44r. Discharged.

Accordingly, since the air discharged through the front seat shower vents 44f has a lower temperature than the air discharged through the rear seat vent vents 44r, the heating performance of the front seat side is lowered. do.

The present invention has been made in view of the above-described conventional problems, and selectively heats air in a shower duct connected to a shower vent for a front seat installed to discharge air toward the bottom of the front seat. By installing a PTC auxiliary auxiliary heater core that can be used, a double-flow air conditioner for vehicles that can improve the heating performance of the front seat side in the normal heating mode, double-flow heating floor mode, or double-flow heating mix mode operation is provided. It aims to do it.

In order to achieve the above object, the present invention has a built-in evaporator for cooling the air and a heater core for heating the air, and formed so that the internal air passage can be selectively converted to a two-layer flow structure, each of the mode door An air conditioning case in which a defrost vent, a face vent, a pair of front seat shower vents, and a floor vent branched to a rear seat floor vent communicating with the front seat shower vent are sequentially installed at the outlet by the opening degree of the entrance controlled by the opening vent; And, a communication path for selectively communicating the warm passage of the air conditioning case and the floor vent for the rear seat. The two-flow air conditioner for a vehicle comprising: a shower duct connected to the front shower vent for extending into a vehicle interior; It is characterized in that the PTC assist auxiliary heater core for selectively heating the air is installed inside.

According to the present invention, in order to adjust the opening degree of the air passage in the air conditioning case, a cold air control door is installed to adjust the opening degree of the cold air passage and the warm passage inlet of the air conditioning case; A first two-flow door is installed downstream of the evaporator to selectively control the flow of air to the heater core in a two-flow structure; A second double flow door is installed to selectively control the flow of air downstream of the heater core to a two-flow structure, and to control the opening degree of the outlet of the warm passage; Floor warming control door is installed to adjust the opening degree of the communication path.

The PTC auxiliary heater core is preferably configured to operate when the inlet of the floor vent is opened or a heating mode in which the communication path is opened is operated. In addition, the PTC auxiliary heater core is preferably made to operate in conjunction with the ambient temperature and the cooling water temperature supplied to the heater core.

The shower duct is preferably made so as to detach the PTC auxiliary heater core in a sliding manner in the middle.

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

3 is 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.

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 inlet 222 of the air conditioning case 220 is connected to a two-layer blower (not shown) formed in a vertically divided structure.

On the other hand, the outlet of the air conditioning case 220, the defrost vent 230, the face vent 232 and the floor vent 234, the opening degree of the inlet is adjusted by the respective mode doors 230d, 232d, 234d It is installed in turn.

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 includes a pair of front seat shower vents 234f for discharging air toward the bottom of the front seat, and a front shower vent 234f for discharging air toward the bottom of the rear seat. It is branched to the floor vent 234r for communicating with the back seat.

The evaporator 200 has a function of making the air into cold by heat-exchanging the air flowing from the refrigerant flowing through the double-flow blower and the refrigerant flowing in the inside of the separation plate 224 at the inlet side of the air conditioning case 220. Done.

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 a PtC auxiliary heater core 212 installed at the rear of the heater core 210 so as to heat the air passing through the heater core 210 in the case of a cold or a lack of heating, for example. .

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, a downstream section of the evaporator 200, which divides the internal air flow path and the external air flow path in the two-laminar flow mode, so that the warm passage P2 on which the heater core 210 is installed may be converted into a two-flow flow structure. The second double-flow flow door 242 and the second double-flow flow door 244 for adjusting the amount of air flow up and down downstream of the heater core 210, and also adjusts the opening degree of the outlet passage (P2), the air conditioning It is installed in the 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.

According to the present invention, in order to be able to supply air to the vehicle interior, each vent is connected to the duct, for example, each shower seat duct 234f is connected to the shower duct 236. The shower duct 236 is further provided with a PTC auxiliary heater core 213 for selectively heating air. Accordingly, in the case of cold weather or lack of heating, air is introduced into the floor vent 234 through the inlet or the communication path 246 of the floor vent 234, and part of the air is the front shower vent 234f. And when it is discharged to the vehicle interior through the shower duct 236, it can be selectively heated according to the operation of the PTC auxiliary heater core 213, it is possible to increase the heating performance of the front seat side of the vehicle interior.

The shower duct 236 is preferably made so that the PTC assistant auxiliary heater core 213 can be attached and detached in a sliding manner.

In addition, the PTC auxiliary heater core 213 is preferably made to operate when the inlet of the floor vent 234 is opened, or when the heating mode in which the communication path 246 is opened is operated. In addition, the PTC auxiliary heater core 213 is preferably made to operate in conjunction with the outdoor air temperature and the cooling water temperature supplied to the heater core 210, for example, the outdoor air temperature is 10 ℃ or less, or the cooling water temperature is 70 ℃ It can be operated in the following cases.

Next, the operation of the vehicle double-flow air conditioner according to the present invention configured as described above will be described. Here, the description of the case in which the cooling mode is operated will be omitted and only the case in which the heating mode is operated will be described.

<Normal maximum heating mode>

As shown in FIG. 3, when the normal maximum heating mode in which the cold air passage P1 is completely closed is operated, the double-flow blower, which is not shown, selectively sucks inside or outside air, thereby allowing the inlet of 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-flow 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, and the first two-flow flow. In cooperation with the door 242, the second bi-flow door 244 operates so that the upper and lower halves downstream of the heater core 210 communicate with each other. In addition, the warmth adjusting door 248 for the floor operates to close the communication path 246. The vents 230, 232, and 234 have an opening degree adjusted according to a predetermined air discharge mode. In FIG. 3, an example in which the inlet of the defrost vent 230 and the inlet of the floor vent 234 are opened is illustrated. It is.

Accordingly, the air blown to the upper / lower half of the evaporator 200 by the two-flow blower is directed toward the heater core 210 in the two-layer flow structure by the first double-flow flow door 242 via the evaporator 200. Flow. The air flowing toward the heater core 210 in the two-layer flow structure is heat-exchanged with the cooling water flowing inside 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.

As such, when the normal maximum heating mode is activated, if it is determined that the cold weather or the heating is insufficient, the PTC auxiliary heater core 213 may be operated. For example, in consideration of the outdoor air temperature or the cooling water temperature, when the outdoor air temperature is 10 ° C. or less or the cooling water temperature is 70 ° C. or less, the PTC auxiliary heater core 213 may be operated. Therefore, in the process of discharging part of the warmth flowing into the floor vent 234 through the inlet of the floor vent 234 to the bottom of the front seat through the front shower vent 234f and the shower duct 236. Since it can be further heated and discharged toward the bottom of the front seat, the heating performance of the front seat of the vehicle can be improved.

<Two-layer heating mix mode>

5 shows a state when the two-flow heating mix mode is activated. In this 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 open to, for example, 1/2 degree or more. In addition, the two-flow blower (not shown) is driven in a two-flow air suction mode in which the intake door 146 is pivoted to the position of the baffle 150 to simultaneously suck the inside / outside 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 into the two-flow blower is heated through the upper half of the evaporator 200 and the upper portion of the first two-flow door 242. Flows toward the upper half of the heat exchanger to be heated by heat exchange to warmth, and the warmth flows to the air mixing region MZ through the upper portion of the second double-flow flow door 244, through the defrost vent 230 of the vehicle interior. It is discharged toward the windshield and used for defogging of the windshield and heating of the vehicle interior. That is, the dry outside air is discharged toward the windshield, so that the defogging action of the windshield can be performed smoothly.

In addition, the bet sucked into the two-flow blower flows through the lower half of the evaporator 200 and the lower half of the first two-flow flow door 242 toward the lower half of the heater core 210 to be heated by heat exchange to be warm. The warm air is discharged into the vehicle interior through the lower portion of the second double flow door 244, the communication path 246, and the floor vent 234 to function as a heating device. 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.

As such, when the two-flow heating mix mode is activated, as in the case of the general maximum heating mode described above, the PTC auxiliary heater core 213 may be operated, and thus, through the communication path 246. Since some of the warm air flowing into the floor vent 234 is discharged toward the bottom of the front seat through the front shower vents 234f and the shower duct 236, the warmer may be discharged toward the bottom of the front seat. In addition, the heating performance of the front seat of the vehicle can be further improved.

<2nd floor heating floor mode>

When the two-flow heating floor mode is activated, as shown in FIG. 6, 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 can maintain a predetermined opening degree by the floor warmth adjusting door 248 in order to match the distribution of the floor side airflow between the front seat and the back seat, and also the floor warming door 248. By fully opening the communication path 246), the rest of the action is performed in the double-flow heating mix mode, except that the amount of warm air discharged toward the indoor floor of the vehicle increases compared to when the double-flow heating mix mode is activated. Is the same as when

According to the vehicle double-flow air conditioner according to the present invention configured as described above, when the cold weather or heating is insufficient, by operating the PTC auxiliary heater core 213 in conjunction with the outdoor air temperature or the cooling water temperature, the front seat shower Since the air discharged into the vehicle interior can be selectively heated through the vent 234f and the shower duct 236, the heating performance of the front seat side can be improved, and thus, comfortable vehicle running in winter can be achieved.

Claims (5)

An evaporator 200 for cooling air and a heater core 210 for heating the air are built in, and an air passage therein is formed to be selectively switched to a two-layer flow structure, and each mode door , Defrost Vent 230, Face Vent 232 and a pair of Shower Vents 234f for controlling the opening degree of the inlet by 230d, 232d, and 234d. An air conditioning case in which floor vents 234 branched to floor vents 234r communicating with the front shower vents are sequentially installed at the outlets; And a communication passage 246 for selectively communicating the warm passage P2 of the air conditioning case with the floor vent for the rear seat. In the interior of the shower duct (Shower Duct, 236) connected to the shower seat for the front seat, a PTC (positive thermister coefficient) auxiliary heater core 213 for selectively heating air is installed Two-layer air-conditioning device for a vehicle, characterized in that. The method of claim 1, In order to adjust the opening degree of the air passage in the air conditioning case 220, the cold air control door 240 is installed to adjust the opening degree of the cold air passage (P1) and the warm passage (P2) inlet of the air conditioning case; A first double flow door 242 is installed downstream of the evaporator 200 to selectively control the flow of air to the heater core 210 in a double flow structure; A second double flow door (244) is provided to selectively adjust the flow of air downstream of the heater core to a two-flow structure, and to control the opening degree of the outlet of the warm passage; Floor warmth control door 248 is installed to adjust the opening degree of the communication path, characterized in that the vehicle two-flow air conditioner. The method according to claim 1 or 2, The PTC auxiliary heater core 213 is activated when the inlet of the floor vent 234 is opened or the heating mode in which the communication path 246 is opened is activated. . The method according to claim 1 or 2, The PTC auxiliary heater core (213), the vehicle two-flow air conditioner, characterized in that the operation is made to operate in conjunction with the ambient temperature and the coolant temperature supplied to the heater core (210). The method of claim 1, The shower duct 236, the vehicle two-flow air conditioner, characterized in that made in such a way to detach the PTC auxiliary heater core (213) in a sliding manner in the middle.

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