KR20010108769A - Air conditioner for vehicles - Google Patents

Abstract

The present invention relates to an air conditioner for an automobile, and the purpose of the present invention is to effectively prevent internal and external air from leaking from the boundary between two blower fans in the internal and external air separation mode, and to facilitate assembly. .

In the air conditioner of the present invention, the air conditioner case 1 in which the evaporator 31 and the heater core 32 are embedded is divided into upper and lower air passages 11 and 12 by the separating wall 13. The scroll case 2 installed at the inlet of the air conditioner case 1 is divided into upper and lower scroll parts 21 and 22 by an extension part of the separation wall, and blowing fans 23 and 24 are installed therein. do. The air guide duct 4 has internal and external air inlets 41 and 42 to selectively guide the flow of internal and external air to the upper and lower scroll parts. The shaft pipe portion 232 of the first blower fan 23 is inserted into and condensed into the shaft pipe portion 242 of the second blower fan 24, and the separation wall 13 extends around the coupling portion thereof to extend the first blower. The boundary between the fan 23 and the second blowing fan 24 is blocked. In addition, the internal and external air partition walls 27 may be further protruded on the upper one side of the upper scroll unit 21 so that internal and external air are separated or mixed and introduced into the scroll units 21 and 22.

Description

Automotive Air Conditioning Unit {AIR CONDITIONER FOR VEHICLES}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and in particular, a flow path and a scroll case of an air conditioner case are divided up and down by a partition wall, and two scroll flows are provided with two blowing fans up and down in the scroll case. In a vehicle air conditioner having a structure, the present invention relates to a vehicle air conditioner capable of preventing internal and outdoor air from leaking and mixing with air blowers at the boundary of two blower fans in an internal and outdoor air separation mode. .

As shown in FIG. 6, in general, a vehicle air conditioner includes a refrigerant compressed by a compressor 61 driven by a power of an engine (not shown) and introduced into a condenser 62 to supply a cooling fan. Heat exchange fan 661 of the blower unit 66 in the process of heat exchange and condensation by forced blowing of the air) and then flowing back into the compressor 61 through the receiver dryer 63, the expansion valve 64, and the evaporator 65 in order. A device for cooling the interior of the vehicle by allowing the air blown by the heat exchanger with the refrigerant passing through the evaporator 65 to be introduced into the room in a cold state; In the process of returning the coolant of the engine to the engine through the heater core 67, the air blown by the blower fan 661 is exchanged with the coolant passing through the heater core 67 and introduced into the room in a warm state so that the interior of the vehicle is opened. It is a device including a heating device for heating.

In the air conditioner as described above, the evaporator 65 and the heater core 67 are installed in the inner flow path of the air conditioner case 7 and the inlet end of the air conditioner case 7 in front of the evaporator 65. The blower unit 66 is installed at the outlet end of the air conditioning case 7 at the rear of the heater core 67 and the defrost vent 71 for removing the defrost of the car window by discharging cold or warm air toward the car window. A face vent 72 for cooling and cooling the room by discharging cold or warm air to the upper half of the vehicle interior, and a foot vent for cooling and cooling the room by discharging cold or warm air to the lower half of the vehicle interior 72 are sequentially installed. Each of the vents 71, 72, and 73 is provided with doors 711, 721, 731 in order to control the opening and closing of the vents 71, 72, and 73 according to predetermined requirements. In such an air conditioner, an outside air suction port 663 and an air suction port 664 are sequentially formed at both upper ends of the blower case 662 of the blower unit 66, and the outside air suction port 663 and the internal air suction port 664 are provided. ) Is selectively opened and closed by the switching door 665. Therefore, when only the outside air is supplied to the room through the outside air intake port 663 during operation of the air conditioner, the load of the compressor is large, resulting in high fuel loss, and when only the inside air is circulated through the air intake port 664, It will be polluted and damage the health of the occupants. In addition, when the conversion door 665 is placed in a neutral position and the bet and the outside air are supplied together, the bet and the outside air are mixed and the bet is continuously discharged to the front of the occupant, thereby causing discomfort because the passenger does not feel the fresh feeling of the outside air.

In order to solve the above problems, air conditioning apparatuses which can be supplied to the interior of an automobile by separating or mixing the inside and outside air have been proposed, and are representative of such air conditioning apparatuses. Japanese Patent Laid-Open Nos. 10-119533, 11-11451, Air conditioners disclosed in Japanese Patent Application Laid-Open No. 11-115451. These air conditioners are configured to blow air in a two-layer flow structure by dividing the flow path of the scroll case and the air conditioning case up and down and installing a blower fan in the upper space and the lower space, respectively. However, in the conventional air conditioning case of the two-layer flow structure, the boundary between the first blowing fan and the second blowing fan is not completely blocked by the partition wall, so that air flowing by the first blowing fan at the boundary (for example, outside air) And the air flowing by the second blowing fan (for example, bet) is leaked and mixed with each other there is a problem that the air conditioner of the two-layer flow structure can not achieve the intended purpose smoothly. In particular, in the case of the air conditioner of Japanese Patent Application Laid-Open No. 11-20451, mutual mixing due to leakage of outside air and bet is reduced, but it is difficult to manufacture a blower fan. Not only is the cost rising, but there is a problem that it is difficult to assemble.

The present invention has been made in consideration of the above-described conventional problems, it is possible to effectively prevent the internal and external air flowing by the blowing fans at the boundary of the two blowing fans in the internal, outdoor air separation mode is mixed with each other, and assembled An object of the present invention is to provide an air conditioner for an automobile that is easy to work with.

1 is a cross-sectional view showing an operating state in an outdoor air conditioner as a vehicle air conditioner according to the present invention.

2 is a cross-sectional view showing an operating state in the betting mode as a vehicle air conditioner according to the present invention.

3 is a cross-sectional view showing the operating state of the internal and external air separation mode for a vehicle air conditioner according to the present invention.

Figure 4 is a cross-sectional view showing the operating state in the combined internal and outdoor air conditioner for a vehicle air conditioner according to the invention.

5 is an enlarged cross-sectional view showing a main portion of a vehicle air conditioner according to the present invention.

6 is a configuration diagram showing an example of a conventional general automotive air conditioner.

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

1: air conditioning case, 2: scroll case,

4: air guide duct, 11: upper air flow path,

12: lower air flow path, 13: dividing wall,

14, 15, 16, 17: vent, 18: door,

21: upper scroll portion, 22: lower scroll portion,

23: the first blowing fan, 24: the second blowing fan,

25 motor, 31 evaporator,

32: heater core, 43: internal and outdoor air conversion door,

42: outside air inlet, 41: inside air inlet,

27: inside and outside partition walls, 231, 241: fan hub,

232, 242: shaft portion, 233, 243: fan hub plate,

234, 244: guide feather

In order to achieve the above object, the present invention, the evaporator and the heater core is installed in the front and rear inside, the inside is partitioned up and down into the upper air passage and the lower air passage by the separating wall, respectively the doors at the exit end of the air passages An air conditioning case provided with a plurality of vents opened and closed by; It is installed at the inlet end of the air conditioning case and is partitioned into an upper scroll portion and a lower scroll portion by an extension of the separation wall, and each of the scroll portion in order to rotate by the same motor, the first blowing fan and the second blowing fan in turn An installed scroll case; In addition, the opening case of the outside air inlet or the inside air inlet installed at the upper side by the turning of the switching door is adjusted so that the outside air or the inside introduced through the outside air inlet or the inside air inlet may selectively flow to the upper scroll portion or the lower scroll portion. And an air guide duct surrounding the inlet end of the air conditioning case, wherein the first blowing fan extends outwardly while the first fan hub plate is inclined downward from an outer circumferential surface of the central first shaft pipe part. And a plurality of guide vanes arranged along an upper edge of the first fan hub plate, the first fan hub having a shape in which a bottom center portion is recessed upwards, and the second blowing fan may be formed at an upper end portion of the second shaft pipe in the center. The first shaft portion is inserted into the shaft and the first fan hub plate And a plurality of second fan hubs arranged along the bottom edge of the second fan hub plate and the second fan hub plate extending outward from the outer circumferential surface of the second shaft pipe part to extend outward to form an upper surface protruding upward. The guide wall has a plurality of guide vanes, and the partition wall extends in correspondence with the shape of the fan hub plates to the circumference of the first shaft tube portion and the second shaft tube portion to block the boundary between the first blower fan and the second blower fan. It is characterized by being.

In addition, according to the present invention, when the switching door is turned to a predetermined position by blocking the communication between the upper scroll portion and the lower scroll portion, only the outside air flows into the upper scroll portion and the upper one side of the upper scroll portion so that only the bet flows into the lower scroll portion. In and outside air partition wall can be installed more protruding.

According to the air conditioner for automobiles according to the present invention configured as described above, in the air inlet mode, the inlet opening is blocked by the switching door. Therefore, the outside air introduced through the outside air inlet flows into the lower scroll portion as well as the upper scroll portion. Therefore, the fresh air is heat-exchanged to the interior of the vehicle by supplying air outside not only to the upper air passage but also toward the lower supply passage.

In the inflow mode, the outside air inlet is blocked by the switching door. Therefore, the bet introduced through the bet inlet flows into the lower scroll part as well as the upper scroll part. Therefore, the bet is blown not only to the upper air flow path but also to the lower supply flow path, so that the heat-exchanged bet is circulated and supplied to the vehicle interior.

On the other hand, in the internal and external air separation mode, the free end of the switching door pivots to the internal and external partition walls so that the outside air inlet passes through the upper scroll portion and the inside air inlet communicates with the lower scroll portion. Each bet is supplied to the supply channel. Therefore, the interior and exterior air heat exchanged inside can be supplied separately according to the position.

In addition, in the combined internal and outdoor air modes, as the switching door swings to a position between the outdoor air inlet and the partition wall, outdoor air and internal air are mixed into the upper scroll part, and only internal air is introduced into the lower scroll part. Therefore, the interior or exterior air heat exchanged inside and outside air can be supplied separately to the vehicle interior according to the location.

In the present invention, since the boundary between the first blower fan and the second blower fan is blocked by the separating wall, the air blown into the upper air flow path and the air blown into the lower air flow path do not leak and are not mixed with each other. In the separation mode and the combined internal and outdoor modes, the indoor heating and cooling may be at a bi-level state.

Other features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

As shown in FIGS. 1 to 4, reference numeral 1 denotes an air conditioner case, in which an evaporator 31 and a heater core 32 are installed in the front and rear, and the inside of the air conditioner case 1 is transverse to the center. The upper air flow passage 11 and the lower air flow passage 12 are partitioned up and down by the separating wall 13 installed as a result. A foot vent 14 is installed at the exit end of the lower air passage 12 toward the floor of the vehicle, and a defrost vent 15 facing the vehicle window is installed at the exit end of the upper air passage 11. The face vents 16 which face the upper half of the room are provided in sequence. In addition, a communication vent 17 communicating with the upper air passage 11 and the lower air passage 12 is formed at a rear end of the dividing wall 13 (that is, the outlet end of the air passages). 14 to 17 are opened and closed by the doors 18, respectively.

In addition, a scroll case 2 is provided at an inlet end of the air conditioner case 1, and the scroll case 2 has an upper scroll portion 21 and a lower scroll portion by an extended portion of the separating wall 13. It is divided into 22. In addition, a first blowing fan 23 is rotatably installed on the upper scroll part 21, and a second blowing fan 24 is rotatably installed on the lower scroll part 22. The blowing fan 23 and the second blowing fan 24 are rotated by the motor 25 provided below the lower scroll portion 22.

According to the present invention, as shown in FIG. 5, the first blowing fan 23 is inclined downward to the outer circumferential surface of the first shaft pipe part 232 and the first shaft pipe part 232 disposed at the center of the outside. It comprises a first fan hub 231 having a first fan hub plate 233 extending toward, and a plurality of guide feathers 234 arranged along the top edge of the first fan hub plate 233. Accordingly, the first fan hub 231 has a shape in which a bottom center portion thereof is recessed upward. In addition, the second blowing fan 24 is inclined downward to the outer circumferential surface of the second shaft pipe part 242 in correspondence with the shape of the second shaft pipe part 242 and the first fan hub plate 233 disposed at the center. A second fan hub 241 having a second fan hub plate 243 extending outwardly and a plurality of guide vanes 244 arranged along the bottom edge of the second fan hub plate 243. Is done. Accordingly, the second fan hub 241 has a shape substantially the same as that of the first fan hub 231 while forming a shape in which an upper surface center portion protrudes upward. In addition, the lower end of the first shaft pipe part 232 of the second shaft pipe part 242 so that the first blowing fan 23 and the second blowing fan 24 may rotate together with the driving of the motor 25. It is inserted and condensed at the upper end. To this end, the upper end portion of the second shaft pipe portion 242 preferably has an inner diameter larger than its lower side corresponding to the outer diameter of the first shaft pipe portion 232.

In addition, the fan hub plates 233 and 243 may divide the scroll wall 2 partitioning the scroll case 2 upward and downward to a portion around the coupling portion between the first shaft pipe part 232 and the second shaft pipe part 242. It extends in correspondence with the shape of and blocks the boundary between the first blowing fan 23 and the second blowing fan 24. Therefore, as will be described later, the outside air flowing by the rotation of the first blowing fan 23 and the bet flowing by the rotation of the second blowing fan 24 are separated from the first blowing fan 23 by the separating wall 13. Leaking through the boundary with the second blowing fan 24 and mixed with each other can be effectively blocked.

On the other hand, the reference numeral 4 is an air guide duct 4, the outside air inlet 42 and the inside air inlet 41, the opening degree of which is adjusted by the turning of the switching door 43 is provided on the upper, the outside air inlet 42 The scroll case 2 and the air conditioning case 1 so that the bet introduced through the outside air or the inside air inlet 41 may selectively flow to the upper scroll portion 21 or the lower scroll portion 22. It consists of a structure surrounding the entrance end of the).

In addition, according to the present invention, when the switching door 43 is swiveled to a predetermined position, only the outside air flows into the upper scroll portion 21 by blocking the communication between the upper scroll portion 21 and the lower scroll portion 22. In order to allow only the bet to flow into the lower scroll part 22, an inner and outer partition wall 27 may be further provided on an upper side of the upper scroll part 21.

Next, operation of the air conditioner for automobiles according to the present invention configured as described above will be described.

First, in the outside air inflow mode, as shown in FIG. 1, the inside air inlet 41 of the air guide duct 4 is blocked by the switching door 43, and the outside air inlet 42 is opened. Therefore, air can be introduced only through the outside air inlet 42, and this air is fresh outside air. As the outside air flows into the lower scroll part 22 as well as the upper scroll part 21, the outside air is not only the upper air flow path 11 but also the lower air by the first blowing fan 23 and the second blowing fan 24. It may be blown toward the flow path (12). When the outside air is blown through the upper air passage 11 and the lower air passage 12, it passes through the evaporator 31 and the heater core 32, and in the process, the outside air is exchanged with cold air or warm air to change the upper air passage ( 11) and the air flow toward the outlet end of the lower air passage 12 and finally discharged through the vents to the interior of the vehicle is used for heating and cooling the room.

In addition, as shown in FIG. 2, the outside air inlet 42 is blocked by the switching door 43 while the inside air inlet 41 is opened in the air inlet mode. Therefore, air can flow in only through the inlet opening 41, and this air is a bet. This bet may flow into the lower scroll portion 22 as well as the upper scroll portion 21. Accordingly, the bet is blown by the first blower fan 23 and the second blower fan 24 toward the lower air flow passage 12 as well as the upper air flow passage 11, and thus the bet is blown by the upper air flow passage 11 and When the air is blown through the lower air passage 12, it passes through the evaporator 31 and the heater core 32. In this process, the bet is exchanged with cold air or warm air to heat the upper air passage 11 and the lower air passage 12. It flows toward the outlet end of and is finally discharged through the vents to the interior of the car to be used for heating and cooling the room.

Meanwhile, in the internal and external air separation modes, as shown in FIG. 3, the free end of the switching door 43 pivots to the internal and external air partition walls 27 so that both the outdoor air inlet 42 and the air inlet 41 open. However, the outside air inlet 42 may only pass toward the upper scroll portion 21, and the inside air inlet 41 may pass only toward the lower scroll portion 22. Therefore, the outside air flowing into the upper scroll portion 21 through the outside air inlet 42 is blown toward the upper air flow passage 11 by the first blowing fan 23, and the lower scroll portion (eg, through the inside air inlet 41). The outside air flowing into the air 22 is blown toward the lower air passage 12 by the second blowing fan 24. As described above, in the present invention, the boundary between the first blowing fan 23 and the second blowing fan 24 in the process of blowing outside air into the upper air passage 11 and blowing the lower air passage 12 is a separation wall ( 13), the inside and outside air is prevented from leaking through the boundary and mixed with each other. As such, cold or warm air that is heat-exchanged in the process of passing through the evaporator 31 and the heater core 32 in a state where the outside air blown into the upper air flow passage 11 and the bet blown into the lower air flow passage 12 are separated. And flows toward the outlet end of the upper air passage 11 and the lower air passage 12 and finally discharged through the vents 14, 15, and 16 into the vehicle interior. In this case, the dry outside air in the heating foot mode and the heating mix mode may be discharged toward the car window to effectively prevent frost on the car glass, and the bet may be discharged toward the car floor to improve heating performance.

In addition, in the combined internal and external air modes, as illustrated in FIG. 4, the internal and external air as described above is rotated as the switching door 43 rotates to a position between the external air inlet 42 and the internal and external air partition walls 27. As in the separation mode, both the outside air inlet 42 and the inside air inlet 41 are open, but the bet introduced through the inside air inlet 41 due to the opening angle of the conversion door 43 is not only lower scroll part 22 but also the upper scroll. Although it can easily flow toward the portion 21, the outside air flowing through the outside air inlet 42 is difficult to flow toward the lower scroll portion 22. Therefore, the outside air and bet are mixed and introduced into the upper scroll part 21, and only the bet is introduced into the lower scroll part 22, so that air blown into the upper air flow path 11 by the first blowing fan 23. Is the inside and outside air mixed air, and the air blown into the lower air passage 12 by the second blowing fan 24 is inside air. Even in this case, in the present invention, since the boundary between the first blowing fan 23 and the second blowing fan 24 is blocked by the separating wall 13, the inside and outside mixed air and the inside are leaked through the boundary. Incorporation into each other is prevented. The air blown in this way is exchanged with cold or warm air through heat exchange in the course of passing through the evaporator 31 and the heater core 32 and flows toward the outlet end of the upper air passage 11 and the lower air passage 12, and finally As it is discharged into the interior of the vehicle through the vents, it is used for heating and cooling the room in the bi-level state of the internal and outdoor mixed air and the internal air.

In the internal and outdoor combined mode, the indoor air is contaminated when continuously operated in the internal mode during cooling. Therefore, it is necessary to intermittently introduce fresh outside air to introduce fresh air. At this time, in the conventional air conditioner, when high temperature and high humidity air is introduced when the internal air is switched to the outdoor air mode, the white air is generated toward the discharge port of the vents while being mixed with the low temperature and low evaporator part. Therefore, in order to prevent the outside air and bet to be mixed inside the air guide duct (4) it is possible to reduce the temperature and humidity difference by mixing the hot and humid outside air and low temperature and low humidity bet, thus the mixed air in this state When the air is blown by the blowing fans 23 and 24, it is possible to prevent the occurrence of white fog.

In each mode as described above, the air blown through the upper air passage 11 and the air blown through the lower air passage 12 are mixed or separated according to the opening and closing of the communication vent 17. Can be discharged.

In the vehicle air conditioner according to the present invention configured as described above, since the boundary between the first blowing fan 23 and the second blowing fan 24 is effectively blocked by the separating wall 13, the upper air flow path Since the air blown by (11) and the air blown by the lower air flow passage 12 do not leak and mix with each other, in particular, the frost is effectively prevented from being caught in the vehicle glass during the heating foot mode and the heating mix mode in the internal and external air separation mode. In addition, the heating performance can be improved.

In addition, the first blower fan 23 and the second blower fan 24 can be easily coupled to each of the shaft tube portion 232,242 to adopt a structure that can be disposed on the upper scroll portion 21 and the lower scroll portion 22. By doing so, the assembly work can be done easily.

Claims (4)

The evaporator 31 and the heater core 32 are installed in the front and rear inside, and the inside is divided up and down into the upper air passage 11 and the lower air passage 12 by the separating wall 13, and the outlets of the air passages An air conditioning case (1) provided with a plurality of vents (14, 15, 16) which are opened and closed by doors (18), respectively; It is installed at the inlet end of the air conditioning case and is divided into an upper scroll portion 21 and a lower scroll portion 22 by an extension of the separation wall, and each scroll portion is rotated by the same motor 25. A scroll case 2 in which the first blowing fan 23 and the second blowing fan 24 are installed in order; The opening degree of the outside air inlet 42 or the inside air inlet 41 installed at the upper side by the turning of the switching door 43 is adjusted so that the outside air or the inside which flows through them may selectively flow toward the scroll parts. In the automotive air conditioner comprising a scroll case and an air guide duct (4) surrounding the inlet end of the air conditioning case, The first fan fan 23 has a first fan hub extending from the outer circumferential surface of the first shaft pipe part 232 in the center to the outside while the first fan hub plate 233 is inclined downward to form a shape in which the bottom center portion is recessed upward. 231 and a plurality of guide vanes 234 arranged along the top edge of the first fan hub plate; The second blower fan 24 has the first shaft pipe part inserted into the upper end of the second shaft pipe part 242 in the center thereof, and the second fan hub plate is formed from the outer circumferential surface of the second shaft pipe part in correspondence with the first fan hub plate. (243) has a second fan hub (241) that is inclined downward and extends outward to protrude upward and a plurality of guide vanes (244) arranged along the bottom edge of the second fan hub plate; The separation wall 13 extends in correspondence with the shape of the fan hub plates 233 and 243 so as to be close to the circumference of the coupling portion between the first shaft pipe part 232 and the second shaft pipe part 242. An air conditioner for automobiles, wherein the boundary between the 23 and the second blowing fan 24 is blocked. The method of claim 1, When the switch door 43 turns to a predetermined position, the upper scroll portion 21 and the lower scroll portion 22 block communication so that only the outside air flows into the upper scroll portion and only the inside flows into the lower scroll portion. Automotive air conditioning apparatus, characterized in that the inner and outer partition walls 27 are further protruded on one side of the upper portion. The method according to claim 1 or 2, The upper end portion of the second shaft tube portion 242 has an inner diameter that is larger than its lower side corresponding to the outer diameter of the first shaft tube portion 232 so that the lower end portion of the second shaft tube portion 242 An air conditioner for automobiles, which is inserted into and condensed at the upper end. The method of claim 3, wherein The rear end of the separation wall 13 at the outlet end of the upper air passage 11 and the lower air passage 12 is connected to the door 18 to selectively communicate the upper air passage 11 and the lower air passage 13. Automotive ventilator, characterized in that the communication vent 17 is opened and closed further.