KR20230084667A - Air conditioner for vehicle - Google Patents

Abstract

Disclosed is an air conditioner for a vehicle, which is configured to be able to reduce a forward-backward-directional width of the vehicle, smoothly guide cold air toward a floor flow path, reduce temperature differences between the upper side and lower side, and evenly transmit cold air to a front seat floor vent and a rear seat floor vent. The air conditioner for a vehicle comprises: a cooling heat exchanger; a heating heat exchanger; an air-conditioning case configured to supply air-conditioning air into the vehicle's interior. The air-conditioning case includes: a floor flow path including a front seat floor vent for discharging air toward the floorboard in a front seat of the vehicle and a rear seat floor vent for discharging air toward the floorboard in a rear seat of the vehicle; a mode door controlling the opening of a defrost vent for discharging air toward the windows and a face vent for discharging air to the upper side; and a cold air control means controlling cold air volume introduced toward the floor flow path side, which is installed in the mode door.

Description

Vehicle air conditioner {AIR CONDITIONER FOR VEHICLE}

The present invention relates to an air conditioner for a vehicle, and more particularly, to an air conditioner for a vehicle having a layout in which a deep door and a vent door are coaxially configured to minimize the size of an HVAC package.

In general, an air conditioner for a vehicle is a device for cooling or heating the interior of a vehicle by heating or cooling air. An air conditioner for a vehicle includes an evaporator, which is a heat exchanger for cooling, and a heater core, which is a heat exchanger for heating, inside an air conditioning case. blow up

Referring to FIG. 1, a conventional vehicle air conditioner 1 includes an air conditioning case 10, a blower, an evaporator 2 and a heater core 3 built in the air conditioning case 10, and an evaporator 2. It is installed between the heater cores 3 and includes a cool air passage bypassing the heater core 3 and a temp door 15 for adjusting the opening degree of the warm air passage passing through the heater core 3 . An electric heater 4 such as a PTC may be further provided upstream of the heater core 3 . The blower is connected to the air inlet of the air conditioning case 10 to blow internal or external air.

An air inlet is formed on the inlet side of the air conditioning case 10, and a plurality of air discharge ports are formed on the outlet side. The air outlet includes a defrost vent 21, a face vent 22 and a floor vent. The floor vent is composed of a front seat floor vent (23) and a rear seat floor vent (24). The air conditioning case 10 is provided with a deep/vent door 16 for adjusting the opening degree of the defrost vent 21 and the face vent 22 and a floor door 17 for adjusting the opening degree of the floor vent.

In the maximum cooling mode, the temp door 15 opens the cold air passage and closes the warm air passage. Accordingly, the air blown by the blower is cooled by heat exchange with the refrigerant flowing inside the evaporator 2 while passing through the evaporator 2, and then moves through the cooling air passage, and is opened by the mode door according to the air conditioning mode. It is selectively discharged to each part of the vehicle interior through the vent.

In the maximum heating mode, the temp door 15 closes the cold air passage and opens the warm air passage. Accordingly, the air blown by the blower passes through the evaporator 2 and then passes through the heater core 3 through the warm air passage to exchange heat with the cooling water flowing inside the heater core 3 to be heated and then returned to the air conditioning mode. It is selectively discharged to each part of the vehicle interior through a vent opened by the mode door.

In the conventional vehicle air conditioner 1, in order to minimize the width t of the air conditioning case 10 in the front and rear direction of the vehicle, the door for adjusting the opening degree of the defrost vent 21 and the opening degree of the face vent 22 are adjusted. The door is made into one coaxial structure. However, several problems arise as the width t of the air conditioning case 10 in the front-rear direction of the vehicle is reduced.

First, the inlet 29 of the floor passage is close to the heater core 3 side, but far from the evaporator 2, so that cold wind is insufficiently introduced into the floor vents 23 and 24.

Second, since the front seat floor vent 23 is relatively closer to the floor passage inlet 29 than the rear seat floor vent 24, an excessive temperature difference between the front seat and the rear seat occurs.

Third, as the discharge temperature of the defrost vent 21 side, which is relatively easy to introduce cold wind, is lowered, an excessive temperature difference between the top and bottom occurs.

In order to solve these conventional problems, in the present invention, while reducing the width in the front and rear directions of the vehicle, the cold air is smoothly guided to the floor flow path, the upper and lower temperature difference is reduced, and the cold air is configured to be evenly delivered to the front seat floor vent and the rear seat floor vent. Provides air conditioning.

An air conditioner for a vehicle according to the present invention includes an air conditioning case configured to supply air conditioning air to the interior of a vehicle in which a heat exchanger for cooling and a heat exchanger for heating are installed. A floor flow path composed of a front seat floor vent for discharging air and a rear seat floor vent for discharging air toward the feet of the rear seat of the vehicle is formed, and a defrost vent for discharging air toward the window and a face vent for discharging air toward the upper side are formed. A mode door for adjusting the opening degree is provided, and a cooling air control means for adjusting the amount of cool air flowing toward the floor passage is provided in the mode door.

The cooling air control means is composed of a temperature channel formed with a guide passage for guiding air toward the floor passage, and the temperature channel is integrally rotated together with the mode door.

The temperature channel is formed in an extended duct shape with both sides open so as to form a guide passage therein.

The temperature channel is formed on the rotating shaft of the mode door, and is partially formed only in the central portion in the longitudinal direction of the rotating shaft.

The mode door is made of a dome-shaped door that rotates coaxially to adjust the opening degree of the defrost vent and the face vent, and the temperature channel is formed parallel to and spaced apart from the dome of the mode door.

In addition, when the mode door is in a position to close the defrost vent and the face vent, the temperature channels are positioned so that the guide passage faces the inlet of the cooling heat exchanger and the floor passage, respectively.

In addition, when the mode door is in a position to fully open the defrost vent and the face vent, the temperature channels are positioned so that the guide passage faces the defrost vent and face vent and the warm air passage passing through the heat exchanger for heating, respectively.

In addition, an electric stone floor door that adjusts the opening degree of the electric stone floor vent; and a rear seat floor door that adjusts the opening of the rear seat floor vent.

In addition, the rear seat floor vent inlet is formed under the front seat floor vent inlet, and the air discharged through the rear seat floor vent is either air flowing into the floor flow path and bypassing the front seat floor vent to go out to the rear seat floor vent, or the rear seat floor vent inlet. This is the air that goes out directly to the rear seat floor vents through the .

The front seat floor doors are provided in flow passages branching from the floor passage to both sides in the vehicle width direction, and a single rear seat floor door is provided at the entrance of the rear seat floor vent.

The inlet of the rear seat floor vent is formed through a bulkhead partitioning the floor flow path and the warm air flow path passing through the heat exchanger for heating.

The heat exchanger for heating and the front seat floor vent are formed directly facing each other without partition walls dividing the front and rear directions of the vehicle therebetween.

The vehicle air conditioner according to the present invention can reduce the width in the front and rear directions of the vehicle, smoothly guide cool air toward the floor passage, reduce the temperature difference between the top and bottom, and evenly deliver the cool air to the front seat floor vents and the rear seat floor vents. In addition, resistance can be minimized in another air conditioning mode in which a temperature channel is not used, and a temperature difference between the front and rear as well as the temperature difference between the top and bottom of the vehicle interior can be reduced.

1 is a side cross-sectional view showing a conventional air conditioner for a vehicle,
2 is a side cross-sectional view showing an air conditioner for a vehicle according to an embodiment of the present invention;
3 is a front cross-sectional view showing a floor flow path of an air conditioner for a vehicle according to an embodiment of the present invention;
4 is a perspective view showing a mode door and a temperature channel of an air conditioner for a vehicle according to an embodiment of the present invention;
5 is a front view showing a mode door and a temperature channel of an air conditioner for a vehicle according to an embodiment of the present invention;
6 illustrates a vent mode of an air conditioner for a vehicle according to an embodiment of the present invention;
7 illustrates a floor mode of an air conditioner for a vehicle according to an embodiment of the present invention;
8 illustrates a bi-level mode of an air conditioner for a vehicle according to an embodiment of the present invention.

Hereinafter, the technical configuration of the vehicle air conditioner will be described in detail according to the accompanying drawings.

1 to 5 , an air conditioner 100 for a vehicle according to an embodiment of the present invention includes an air conditioning case 110, a blowing module, a heat exchanger for cooling, and a heat exchanger for heating. The air conditioning case 110 is configured to supply air conditioning air to the interior of the vehicle.

An air inlet is formed on the inlet side of the air conditioning case 110, and a plurality of air outlets are formed on the outlet side. The air discharge port includes an upper discharge port 111, and the upper discharge port 111 includes a defrost vent for discharging air toward the vehicle window and a face vent for discharging air toward the top (face) of the front seat of the vehicle. In addition, a mode door 160 is provided inside the air conditioning case 110 to adjust the opening degrees of the defrost vent and the face vent.

In addition, the air discharge port further includes a floor vent. That is, a floor flow path is formed inside the air conditioning case 110 . The floor flow path is composed of a front seat floor vent 112 for discharging air toward the feet of a front seat of the vehicle and a rear seat floor vent 113 for discharging air toward the feet of a rear seat of the vehicle. The blowing module is connected to the air inlet of the air conditioning case 110 to blow internal or external air.

The heat exchanger for cooling is composed of an evaporator 120 that cools the refrigerant by exchanging heat with air. The heat exchanger for heating is composed of a heater core 130 that heats cooling water by exchanging heat with air. The evaporator 120 and the heater core 130 are sequentially installed in the air passage inside the air conditioning case 110 . Upstream of the heater core 130 in the air flow direction, an electric heater 140 such as a PTC that generates heat when power is applied is further provided. The electric heater 4 may also be disposed downstream of the heater core 130 .

A temp door 157 is provided inside the air conditioning case 110 . The temp door 157 is disposed between the evaporator 120 and the heater core 130, and the amount of air in the warm air passage passing through the heater core 130 and the amount of air in the cold air passage bypassing the heater core 103 are measured. By adjusting the temperature of the air discharged into the vehicle interior. The temp door 157 is slidable in the vertical direction to adjust the opening between the cold air passage and the warm air passage. The sliding structure of the temp door 157 reduces the width of the air conditioner in the front and rear directions of the vehicle.

Meanwhile, the vehicle air conditioner 100 according to an embodiment of the present invention includes a cold air control means. The cooling air control unit is provided in the mode door 160 to adjust the amount of cooling air flowing into the floor passage. The cold air control means is composed of a temperature channel (200). A guide passage 210 is formed in the temperature channel 200, and the guide passage 210 serves to guide air toward the floor passage.

The temperature channel 200 rotates integrally with the mode door 160. More specifically, the temperature channel 200 is formed in an extended duct shape with both sides open so that the guide passage 210 is formed therein. Although the temperature channel 200 is shown as a duct shape with a rectangular cross section, it is possible to have a cross section of another shape such as a circular shape or a polygonal shape. In addition, the mode door 160 is formed of a dome-type door that rotates coaxially to adjust the opening degree of the defrost vent and the face vent.

That is, the mode door 160 includes a rotating shaft 161 rotatably connected to the air conditioning case 110 and a dome 162 spaced apart from the rotating shaft 161 in a radial direction. The temperature channel 200 is formed on the rotating shaft 161 of the mode door 160, and is partially formed only at the central portion in the longitudinal direction of the rotating shaft 161. As the temperature channel 200 is formed only in the central portion of the mode door 160, resistance can be minimized in an air conditioning mode in which the temperature channel 200 is not used.

In addition, the temperature channels 200 are spaced apart from each other in parallel with the dome 162 of the mode door 160 . Through this configuration, when the mode door 160 is in a position to close the defrost vent and the face vent, which are the upper discharge ports 111, the guide passage 210 faces the inlets of the evaporator 120 and the floor passage, respectively. A temperature channel 200 is located. In addition, when the mode door 160 is in a position to fully open the defrost vent and face vent, which are the upper discharge ports 111, the guide passage 210 passes through the defrost vent and face vent and the heater core 130. The temperature channels 200 are positioned to face the warm air passages, respectively.

Meanwhile, the air conditioning case 110 includes a front seat floor door 175 for adjusting the opening of the front seat floor vents 112 and a rear seat floor door 170 for adjusting the opening of the rear seat floor vents 113. In addition, the inlet 115 of the floor vent 113 for the rear seat is formed below the inlet of the floor vent 112 for the front seat. That is, the inlet of the front seat floor vent 112 is formed above the inlet 115 of the rear seat floor vent 113.

Eventually, the air discharged through the rear seat floor vent 113 is the air that flows into the floor flow path and bypasses the front seat floor vent 112 and goes out to the rear seat floor vent 113, or the air that is discharged through the rear seat floor vent 113 inlet 115 ) through the rear seat floor vent (113).

Front seat floor doors 175 are provided in flow passages branching from the floor passage to both sides in the vehicle width direction. In addition, a single rear seat floor door 170 is provided at the entrance 115 of the rear seat floor vent 113. The front seat floor vent 112 is formed in a passage branched from the bottom of the floor passage inlet to both sides in the width direction. The pair of front seat floor doors 175 adjust the opening degrees of the left front seat floor vent 112 and the right front seat floor vent 112, respectively. The rear seat floor vent 113 is formed in a flow path branched from the bottom of the front seat floor vent 112 to both sides in the width direction.

The inlet 115 of the rear seat floor vent 113 is formed through the partition wall 116 that divides the warm air passage passing through the heater core 130 and the floor passage. The floor passage is formed between the partition wall 116 and the outer wall 117 of the floor. In addition, the inlet of the front seat floor vent 112 is formed on the downstream side of the mixing zone where the hot air passage passing through the heater core 130 and the cold air passage bypassing the heater core 130 meet.

When the front seat floor door 175 is opened, some of the air introduced into the floor flow path through the front seat floor vent 112 inlet is discharged through the front seat floor vent 112, and the other part moves to the lower part to the rear seat floor vent ( 113) is discharged through. In this case, air moving downward toward the rear seat floor vent 113 is allowed to pass through the rear seat floor door 170 . To this end, it is preferable that the rear seat floor door 170 is formed of a tail door type in which plates are formed on both sides around the axis of rotation.

Referring further to FIG. 6 , in the vent mode, the temp door 157 opens both the cold air passage and the warm air passage. The cold air passing through the evaporator 120 and the warm air passing through the heater core 130 are mixed in the mixing zone and then discharged through the face vent 113 . In this case, the mode door 160 is rotated to a position in which the defrost vent and the face vent, which are the upper discharge port 111, are completely opened.

When the mode door 160 is rotated, the temperature channel 200 located substantially parallel to the dome 162 is also rotated, so that the guide passage 210 is the upper discharge port 111, the defrost vent and the face vent, and the heater core ( 130), the temperature channels 200 are positioned to face the warm air passages that have passed through. That is, one side of the guide passage 210 faces the upper discharge port 111 and the other side faces the warm air passage passing through the heater core 130 .

In addition, both the front seat floor door 175 and the rear seat floor door 170 are closed. The warm air that has passed through the heater core 130 does not move toward the floor passage, but moves upward, and is mixed with the cold air that has passed through the evaporator 120 and is discharged through the upper discharge port 111 . In this case, the warm air passing through the heater core 130 and moving upward hardly receives resistance from the temperature channel 200 due to the direction of the temperature channel 200 .

Referring further to FIG. 7 , in the floor mode, the temp door 157 opens both the cold air passage and the warm air passage. In this case, the mode door 160 is rotated to a position to completely close the upper discharge port 111, the defrost vent and the face vent. When the mode door 160 rotates, the temperature channel 200 also rotates, and the temperature channel 200 is positioned so that the guide passage 210 faces the inlets of the evaporator 120 and the floor passage, respectively. That is, one side of the guide passage 210 faces the evaporator 120 and the other side faces the inlet of the floor passage.

In addition, both the front seat floor door 175 and the rear seat floor door 170 are open. The cold air passing through the evaporator 120 is guided to the temperature channel 200 and smoothly moves toward the floor passage. In addition, some of the warm air that has passed through the heater core 130 flows into the floor passage through the inlet 115 of the rear seat floor vent 113 and is discharged to the rear seat floor vent 113 . Another part of the warm air passing through the heater core 130 moves upward and is mixed with the cold air to be discharged to the front floor vent 112 .

Referring further to FIG. 8 , in the bi-level mode, the temp door 157 opens both the cold air passage and the warm air passage. The cold air passing through the evaporator 120 and the warm air passing through the heater core 130 are mixed in the mixing zone and then discharged through the face vent 113 . In this case, the mode door 160 is rotated to a position in which the defrost vent and the face vent, which are the upper discharge port 111, are completely opened.

When the mode door 160 rotates, the temperature channel 200 also rotates, so that the guide passage 210 separates the defrost vent and face vent, which are the upper discharge ports 111, and the warm air passage through the heater core 130, respectively. The temperature channel 200 is positioned so as to face. That is, one side of the guide passage 210 faces the upper discharge port 111 and the other side faces the warm air passage passing through the heater core 130 .

In addition, both the front seat floor door 175 and the rear seat floor door 170 are open. Some of the warm air that has passed through the heater core 130 flows into the floor passage through the inlet 115 of the rear seat floor vent 113 and is discharged to the rear seat floor vent 113 . Another part of the warm air passing through the heater core 130 moves upward and is mixed with the cold air to be discharged to the front floor vent 112 . Another part of the warm air passing through the heater core 130 moves upward and is mixed with the cold air passing through the evaporator 120 and discharged through the upper discharge port 111 .

In this case, the warm air passing through the heater core 130 and moving upward hardly receives resistance from the temperature channel 200 due to the direction of the temperature channel 200 . In addition, the cold air passing through the evaporator 120 is guided to the temperature channel 200 and smoothly moves toward the inlet of the floor passage.

In summary, the rear seat floor door 170 directs the warm air passing through the heater core 130 to the rear seat floor vent 113 . That is, the rear seat floor door 170 allows the warm air that has passed through the heater core 130 to bypass the front seat floor vent 112 and be discharged to the rear seat floor vent 113, so that the hot air introduced toward the rear seat floor vent 113 Allows airflow to be regulated.

In the vehicle air conditioner 100 according to an embodiment of the present invention, the bulkhead 116 can be configured to be short to minimize the package and ventilation resistance of the air conditioner, and the mode door 160 coaxially opens the defrost vent and the face vent. It is possible to minimize the size in the front-rear direction of the vehicle by adjusting .

In addition, a temperature channel 200 and a rear seat floor door 170 are added to ensure mixing of cold air and warm air in the floor mode or the mix mode. The temperature channel 200 is formed only in the central portion in the width direction of the vehicle to minimize resistance in other air conditioning modes that are not used. As the temperature channel 200 is configured coaxially with the rotating shaft of the mode door 160, the cold air is bypassed (guided) toward the floor flow path in the floor mode or the mix mode.

On the other hand, the heater core 130 and the front seat floor vent 112 are formed directly facing each other without a partition separating the front and rear directions of the vehicle therebetween. As described above, since there is no barrier between the heater core 130 and the inlet of the front seat floor vent 112, warm air and cold air are directly discharged to the front seat floor vent 112 without being mixed, resulting in insufficient cold air. In order to solve this problem, the temperature channel 200 according to the present invention can increase the amount of cooling air by guiding the cooling air toward the floor passage.

In addition, since the rear seat floor door 170 is configured separately, when the rear seat floor door 170 is opened in floor mode or mixed mode, warm air flows from the front side of the heater core 130 toward the floor flow path, and the upper side of the floor flow path heats the air. Cool air is guided and introduced through the channel 200 . Therefore, the cold air introduced through the temperature channel 200 may move to the front seat floor vents 112 and the rear seat floor vents 113 .

That is, when cool air is further introduced into the front seat floor vents 112, the discharge temperature of the floor is reduced, thereby reducing the temperature difference between the top and bottom of the vehicle interior. In addition, when more cold air flows into the rear seat floor vent 113, the discharge temperature inevitably decreases due to the discharge port farther than the front seat floor vent 112 and due to the heat pick up of the duct itself, but the rear seat floor door Warm air from the front of the heater core 130 is directly introduced into the rear seat floor vent 113 through the 170, thereby reducing a temperature difference between the front and rear seats.

So far, the vehicle air conditioner according to the present invention has been described with reference to the embodiments shown in the drawings, but this is only exemplary, and anyone skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true scope of technical protection should be determined by the technical spirit of the appended claims.

100: vehicle air conditioner
110: air conditioning case 111: upper discharge port
112: front seat floor vent 113: rear seat floor vent
115: Rear seat floor vent entrance 116: Bulkhead
117: floor outer wall
120: evaporator 130: heater core
140: electric heater 157: temp door
160: mode door 161: rotation shaft
162: dome 170: rear seat floor door
175: All seats floor door
200: temperature channel 210: guide flow

Claims (12)

An air conditioner for a vehicle including an air conditioning case configured to supply air conditioning air to a vehicle interior in which a heat exchanger for cooling and a heat exchanger for heating are installed,
In the air conditioning case, a floor flow path composed of a front seat floor vent for discharging air toward the feet of the front seat of the vehicle and a rear seat floor vent for discharging air toward the feet of the rear seat of the vehicle is formed, and a defrost vent and an upper portion for discharging air toward the window A mode door is provided to adjust the opening of the face vent for discharging air to the side,
An air conditioner for a vehicle, wherein a cooling air control means capable of adjusting the amount of cold air flowing into the floor flow path is provided in the mode door. According to claim 1,
The cold air control means,
An air conditioner for a vehicle comprising a temperature channel formed with a guide passage for guiding air toward a floor passage, wherein the temperature channel integrally rotates together with a mode door. According to claim 2,
The temperature channel is an air conditioner for a vehicle formed of a duct shape with both sides open and extending such that a guide passage is formed therein. According to claim 2 or 3,
The temperature channel is formed on the rotating shaft of the mode door and is partially formed only in the central portion in the longitudinal direction of the rotating shaft. According to claim 4,
The mode door is made of a dome-shaped door that rotates coaxially to adjust the opening of the defrost vent and the opening of the face vent,
The temperature channel is a vehicle air conditioner formed parallel to and spaced apart from the dome of the mode door. According to claim 2 or 3,
When the mode door is in a position to close the defrost vent and the face vent, the temperature channel is located so that the guide passage faces the inlet of the heat exchanger for cooling and the floor passage, respectively. According to claim 2 or 3,
When the mode door is in a position to fully open the defrost vent and the face vent, the temperature channel is located so that the guide passage faces the defrost vent and face vent and the warm air passage that has passed through the heat exchanger for heating, respectively. According to any one of claims 1 to 3,
An electric stone floor door that adjusts the opening degree of an electric stone floor vent; and
An air conditioner for a vehicle equipped with a rear seat floor door that adjusts the opening of a rear seat floor vent. According to claim 8,
The rear seat floor vent entrance is formed at the bottom of the front seat floor vent entrance,
The air discharged through the rear-seat floor vent is air that flows into the floor flow path and bypasses the front-seat floor vent to go out to the rear-seat floor vent, or is air that goes directly to the rear-seat floor vent through the rear-seat floor vent inlet. Device. According to claim 8,
The front seat floor door is provided in a flow path branching from the floor flow path to both sides in the vehicle width direction,
The rear seat floor door is a vehicle air conditioner provided with a single unit at the entrance of the rear seat floor vent. According to claim 9,
The rear seat floor vent inlet is formed through a partition wall that divides the warm air passage passing through the heat exchanger for heating and the floor passage. According to claim 1,
The air conditioner for a vehicle, characterized in that the heat exchanger for heating and the front seat floor vent are formed directly facing each other without a partition wall partitioning the front and rear directions of the vehicle therebetween.

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