KR20200045705A - Air conditioner for vehicle - Google Patents

Abstract

Disclosed is a vehicle air conditioner having an improved slimming shape to achieve a light weight while having stiffness required to drive a sliding type door. The vehicle air conditioner, which includes an air conditioner case provided with a heat exchanger and a door provided in the air conditioner case to adjust the opening degree of an air passage, includes a shaft which is rotatably installed in the air conditioner case and connected to the door to drive the door according to rotation, and the shaft has at least one recessed groove recessed in the radial direction on the outer circumferential surface of an axial part.

Description

Air conditioning system for vehicles {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 sliding door that is provided in an air conditioner case and controls the opening degree of air passages discharged into the vehicle interior.

In general, a vehicle air conditioner is a device for cooling or heating the vehicle interior by heating or cooling in the process of introducing air outside the vehicle into the vehicle interior or circulating air in the vehicle interior, for cooling the interior of the air conditioning case An evaporator and a heater core for heating action are provided. The air conditioning system for a vehicle is configured to selectively blow air cooled or heated by an evaporator or a heater core to each part of the vehicle interior by using a blowing mode switching door.

1 is a sectional view showing a conventional vehicle air conditioner, and FIG. 2 is a perspective view showing a conventional sliding door. 1 and 2, the conventional vehicle air conditioning apparatus 1 includes an air conditioning case 10, a blower, an evaporator 2 and a heater core 3, and temperature control doors 18 and 19. It is made including.

An air inlet 11 is formed at the inlet side of the air conditioning case 10, and the defrost vent 12, the face vent 13, and the floor vent 13 whose opening degree is controlled by the mode doors 15, 16 and 17, respectively, at the outlet side. (14) is formed. The blower is connected to the air inlet 11 of the air conditioning case 10 to perform a function of blowing air or air.

In addition, the evaporator 2 and the heater core 3 are sequentially installed in the air flow direction inside the air conditioning case 10. Temperature control door (18,19) is installed between the evaporator (2) and the heater core (3), the opening degree of the cold air flow path to bypass the heater core (3) and the hot air flow path through the heater core (3) By adjusting the temperature of the air discharged to the vehicle interior is controlled. Cold and warm air that has passed through the cold and hot air passages are mixed in the mixing zone and then selectively discharged into the vehicle interior through the respective vents.

The temperature control door is to selectively control the air passing through the evaporator toward the heater core or to bypass the heater core, and is usually composed of a flat door type or a dome door type rotated on one rotating shaft. , It is provided as a single piece. In the air conditioning apparatus of FIG. 1, an example in which two temperature control doors 18 and 19 are provided is illustrated. The example in which two temperature-adjusting doors are provided up and down may be applied to a structure for sending air conditioning air to the rear seat of a vehicle and a two-layer structure for classifying interior and exterior air into a vehicle interior.

In addition, although the temperature control door of the air conditioning system is exemplified to describe the operating structure of the door, the door may be another door. The first door 18 is connected to the first shaft 21 and is slidably operated by rotation of the first shaft 21, and the second door 19 is connected to the second shaft 22 and is connected to the second shaft ( 22) Sliding by rotation.

Referring to Figure 2, the first shaft 21 and the second shaft 22 is provided with a gear 23, the first door 18 and the second door 19 is a gear engaged with the gear 23 Grooves 24 are formed. The sliding doors 18 and 19 are formed in a substantially rectangular plate shape having a predetermined thickness, and gear grooves 24 that engage the gears 23 of the shafts 21 and 22 on both sides in the width direction are formed.

Conventional vehicle air conditioners are designed to reduce weight by forming a weight loss portion or the like on the shaft. The weight loss portion formed on the shaft contributes to weight reduction, but may also cause a decrease in rigidity. That is, there is a need for an improved structure capable of achieving light weight while having the necessary stiffness for driving the sliding type door.

In order to solve such a conventional problem, the present invention provides an air conditioning apparatus for a vehicle having an improved weight loss shape capable of achieving light weight while having the stiffness required to drive a sliding type door.

A vehicle air conditioner according to the present invention is provided in a vehicle air conditioner including an air conditioner case provided with a heat exchanger and a door provided in the air conditioner to adjust the opening degree of the air flow passage, and rotatably installed in the air conditioner case, It is connected to the door and has a shaft that drives the door according to rotation, and the shaft is formed with at least one recessed groove recessed in the radial direction on the outer circumferential surface of the shaft portion.

In the above, the concave groove has an opening longitudinal cross-section in a hexagonal shape.

In the above, the concave groove is a groove shape concave at a certain depth from the outer circumferential surface of the shaft, and a plurality of concave grooves are formed along the axial direction.

In the above, the recess groove is formed on both one surface and the other surface of the shaft.

In the above, the concave groove is formed in a zigzag position in the axially staggered position on one surface and the other surface of the shaft.

In the above, the concave groove of the hexagonal shape is formed in a regular hexagonal shape, and the fourth edge portion facing the first edge portion of the hexagonal shape is arranged in a direction parallel to the radial direction.

In the above, a hollow hole is formed in the shaft portion of the shaft.

In the above, the hollow hole has a hexagonal shape in cross section.

In the above, the door is made of a sliding door type slidingly moving the inside of the air conditioning case according to the rotation of the shaft, gear portions are fitted to the door on both sides in the axial direction of the shaft, and the recess groove is between a pair of gear portions Is formed on.

In the above, the longitudinal cross-section of the opening hole of the concave groove and the hollow hole is formed in a polygonal shape.

The air conditioning system for a vehicle according to the present invention forms an indentation groove which is a weight loss groove on a shaft, but optimizes its arrangement and shape, thereby effectively reducing the weight of the shaft and at the same time significantly improving the rigidity of the shaft.

1 is a cross-sectional view showing a conventional vehicle air conditioner,
Figure 2 is a perspective view showing a conventional sliding door,
Figure 3 is a cross-sectional view showing a vehicle air conditioning apparatus according to an embodiment of the present invention,
4 is a plan view showing a shaft according to an embodiment of the present invention,
5 is a front view showing a shaft according to an embodiment of the present invention,
Figure 6 shows the indentation groove shape according to a modification of the present invention,
7 is an enlarged view of "A" in FIG. 4,
8 is a longitudinal sectional view taken along line BB of FIG. 5,
9 and 10 are plan views showing a shaft according to a modification of FIG. 4,
11 is a perspective view showing a part of a shaft according to an embodiment of the present invention,
12 is a side view of a shaft according to an embodiment of the present invention,
13 is a cross-sectional view taken along line CC of FIG. 11.

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

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

3, the vehicle air conditioning apparatus 100 according to an embodiment of the present invention includes an air conditioning case 110, a blower, and a plurality of doors. In the air conditioning case 110, a cooling heat exchanger and a heating heat exchanger are sequentially provided in the air flow direction. The door is provided in the air conditioning case 110 to control the opening degree of the air passage, and is composed of a first door 118 and a second door 119 which are temperature-controlled doors, and mode doors 115, 116, and 117.

The heat exchanger for cooling is composed of an evaporator (102) that heats air by exchanging refrigerant and air in a refrigerant cycle, and the heating heat exchanger is a heater core (103) that heats air by exchanging heat with air in the cooling water line circulating the engine. ). The heat exchanger for heating may be made of a heat exchanger using condensation heat of a heat pump system, a PTC heater operated by electricity, and the like.

The first door 118 and the second door 119 are provided in the air conditioning case 110 to adjust the opening degree of the air passage. In this embodiment, the first door 118 and the second door 119 are spaced apart vertically, and are made of a temperature control door. The temperature control door adjusts the opening degree of the air flow path passing through the heater core 103, which is a heat exchanger for heating, and the air flow path bypassing the heater core 103.

An air inlet 111 is formed at an inlet side of the air conditioning case 110, and a defrost vent 112, a face vent 113, and a floor vent 114 whose opening degree is controlled by a mode door 115, 116, and 117, respectively, at an outlet side. Is formed. The blower is connected to the air inlet 111 of the air conditioning case 110 and performs a function of blowing air or air. The evaporator 102 and the heater core 103 are sequentially installed in the air flow direction inside the air conditioning case 110.

Temperature control door (first door and second door) is installed between the evaporator 102 and the heater core 103, passing through the cold air flow path and the heater core 103 bypassing the heater core 103 By adjusting the opening degree of the warm air passage, the temperature of the air discharged into the vehicle interior is controlled. Cold and warm air that has passed through the cold and hot air passages are mixed in the mixing zone and then selectively discharged into the vehicle interior through the respective vents.

According to an embodiment of the present invention, the vehicle air conditioner 100 shows an example in which two temperature control doors are provided as the first door 118 and the second door 119. The example in which two temperature-adjusting doors are provided up and down may be applied to a structure for sending air conditioning air to the rear seat of a vehicle or a two-layer flow structure for introducing the interior and exterior of a vehicle into a vehicle interior.

In addition, the vehicle air conditioner 100 includes a shaft. The shaft is rotatably installed in the air conditioning case 110 and is connected to the door to drive the door according to the rotation. The shaft is connected to the first door 118, the first shaft 200 slidingly moves the first door 118 according to rotation, and the second door 119 is connected to the second door 119 and is rotated. It is composed of a second shaft (200 ') for slidingly moving the second door (119).

4 is a plan view showing a shaft according to an embodiment of the present invention, FIG. 5 is a front view showing a shaft according to an embodiment of the present invention, and FIG. 6 is a concave groove shape according to a modification of the present invention FIG. 7 is an enlarged view of “A” in FIG. 4, and FIG. 8 is a longitudinal sectional view taken along line BB in FIG. 5.

In the following description, the first shaft 200 and the second shaft 200 'are called "shaft 200", and the first door 118 and second door 119 are called "doors." .

4 to 8, the door is made of a sliding door type slidingly moving inside the air conditioning case 110 according to the rotation of the shaft 200. The door is made of a thin plate shape having a predetermined thickness, and a gear part meshing with the shaft 200 is formed on one surface. The shaft 200 is rotated by a power source, and the door slides according to the rotation of the shaft 200.

At least one recess groove 230 is formed in the shaft 200. The shaft 230 is composed of a shaft portion 220 and a pair of gear portions 210 formed on both sides in the axial direction of the shaft portion 220. The gear part 210 meshes with the gear part of the door. In this embodiment, the concave groove 230 is made of a plurality and is formed in a line at regular intervals along the axial direction. The recess groove 230 is formed between the pair of gear parts 210. In addition, the recess groove 230 is recessed toward the center in the radial direction on the outer circumferential surface of the shaft 220 of the shaft 200.

The recess groove 230 has an opening longitudinal section in a polygonal shape. The recess groove 230 may be formed of a hexagon (a), a square (b), a triangle (c) or other polygons as shown in FIG. 6. The polygonal shape is structurally stable and greatly improves the rigidity of the shaft 200. In addition, the recess groove 230 can reduce the material of the shaft 200 as much as the recessed volume, thereby reducing the weight of the shaft by performing the weight loss function together.

In particular, the recess groove 230 is preferably made of a hexagonal shape. On the other hand, Figures 9 and 10 is a plan view showing a shaft according to a modification of Figure 4, the recess groove 230 may be made of a square or a triangle, most preferably composed of a hexagonal shape.

The hexagonal shape provides a strong support structure, such as a honeycomb structure, and is more structurally stable than other polygons such as a square and a triangle, and can significantly improve the rigidity of the shaft 200. In addition, as shown in FIG. 6, since the indentation groove of the hexagon has a larger area than the square and triangle indentation grooves, it is possible to more effectively obtain a weight saving effect and a stiffness reinforcement effect.

The recess groove 230 is formed in a groove shape recessed at a predetermined depth from the outer peripheral surface of the shaft 220 of the shaft 200. That is, the concave grooves 230 are concave shapes in which each is concave at a certain depth, and are greatly advantageous in terms of the rigidity of the shaft compared to the through shape. In this case, if the concave groove is formed in a shape penetrating both sides of the shaft portion, the weight saving effect is slightly increased, but the weight saving effect is slightly abandoned and the concave groove is formed into a concave groove shape to greatly improve the rigidity.

The recess groove 230 is preferably formed on both one surface and the other surface of the shaft 220 of the shaft 200. More preferably, the concave groove 230 is formed in a zigzag position at a position staggered with respect to the axial direction on one surface and the other surface of the shaft 220 of the shaft 200. Referring to FIG. 8, indentation grooves 230 are formed on both sides of the shaft portion 220, and indentation grooves 230 on one side in the axial direction are formed at different positions from the indentation grooves 230 on the other side so as not to face each other. Does not.

In this way, by forming the indentation grooves 230 alternately up and down of the shaft 200, the bottom surface of the indentation grooves 230 on one side is positioned on the other side of the protruding portion (relatively protruding portion) to compensate for stiffness and to be required on both sides. As all of the mouth grooves 230 are formed, the weight loss effect is increased, so that the weight saving effect can be doubled.

In addition, as shown in FIG. 7, the indentation groove 230 in a hexagonal shape is formed in a regular hexagonal shape. The hexagon of the recess groove 230 includes a first edge portion 231, a second edge portion 232, a third edge portion 233, a fourth edge portion 234, a fifth edge portion 235, and a sixth angle. It has a corner portion 236. In this case, the fourth edge portion 234 facing the first edge portion 231 is disposed in a direction parallel to the radial direction. That is, the first corner portion 231 and the fourth corner portion 234 are disposed in a direction perpendicular to the axial direction. Through this configuration, a stronger stiffness effect can be obtained by dispersing the stress concentrated at the corners.

On the other hand, Figure 11 is a perspective view showing a part of the shaft according to an embodiment of the present invention, Figure 12 is a side view of the shaft according to an embodiment of the present invention, Figure 13 is a cross-sectional view along the CC line of Figure 11 .

11 to 13, a hollow hole 225 is formed in the shaft 220 of the shaft 200. The hollow hole 225 is preferably not formed across the entire axial direction of the shaft 200 but is formed only on the end side of the shaft 200 on which the gear portion is formed. The hollow hole 225 is made of a polygonal cross-section. Preferably, the hollow hole 225 has a hexagonal cross-section. The hollow hole 225 improves the rigidity of the shaft portion 220 of the shaft 200 and at the same time reduces the material by the volume of the hollow hole 225 to obtain a weight saving effect.

In addition, by forming a weight loss groove 211 in the gear portion 210, it improves the strength and contributes to the weight saving effect. The weight loss groove 211 may be formed in a plurality in the radial direction around the shaft 220.

As the hollow hole 225 is configured in a hexagonal shape, it provides the most structurally stable honeycomb support structure, such as the hexagonal shape of the indentation groove described above, and exhibits a greater weight loss effect compared to the triangle and square shapes, thereby reducing weight. Improve the effect.

So far, the vehicle air conditioning apparatus according to the present invention has been described with reference to the embodiment 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 technical protection scope should be determined by the technical spirit of the appended claims.

100: vehicle air conditioning system
102: evaporator 103: heater core
110: air conditioning case 111: air inlet
112: Defrost Vent 113: Face Vent
114: Floor vent 115,116,117: Mod door
118: first door 119: second door
200: shaft 210: gear unit
220: shaft 225: hollow hole
230: recess groove

Claims (10)

In the air conditioning device for a vehicle including a climate control case 110 having a heat exchanger, and a door provided in the air conditioning case 110 to adjust the opening degree of the air passage,
It is rotatably installed in the air conditioning case 110, and is provided with a shaft 200 connected to the door to drive the door according to the rotation,
The shaft 200 is an air conditioning apparatus for a vehicle in which at least one concave groove 230 concave in the radial direction is formed on the outer circumferential surface of the shaft portion 220. According to claim 1,
The concave groove 230 is an air conditioning device for a vehicle, characterized in that the opening longitudinal section is formed in a hexagonal shape. According to claim 1,
The concave groove 230 is a groove shape concave at a certain depth from the outer peripheral surface of the shaft portion 220 of the shaft 200, a vehicle air conditioning device is formed in a plurality along the axial direction. According to claim 3,
The concave groove 230 is a vehicle air conditioning device that is formed on both one surface and the other surface of the shaft 220 of the shaft 200. According to claim 4,
The concave groove 230 is air-conditioning device for a vehicle, characterized in that formed in a zigzag position in the axial direction on the one side and the other side of the shaft portion 220 of the shaft 200. According to claim 2,
The hexagon-shaped indentation groove 230 is made of a regular hexagonal shape, and the fourth corner portion 234 facing the first corner portion 231 of the hexagon is arranged in a direction parallel to the radial air conditioning for a vehicle. Device. According to claim 1,
A vehicle air conditioning apparatus, characterized in that a hollow hole (225) is formed in the shaft portion (220) of the shaft (200). The method of claim 7,
The hollow hole 225 is a vehicle air conditioning apparatus, characterized in that the cross-section is made of a hexagonal shape. According to claim 1,
The door is made of a sliding door type slidingly moving inside the air conditioning case 110 according to the rotation of the shaft 200,
A vehicle air conditioner that is provided with gear portions 210 that are fitted to doors on both sides of the shaft 200 in the axial direction, and that the recess groove 230 is formed between a pair of gear portions 210. The method of claim 7,
Air conditioning device for a vehicle, characterized in that the longitudinal cross-section of the opening hole and the hollow hole 225 of the concave groove 230 is formed in a polygonal shape.

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