KR102603500B1 - Air conditioner for vehicle - Google Patents

Abstract

A vehicle air conditioning system is disclosed that can drive a sliding door with higher torque by improving the gear ratio of the power transmission means. An air conditioning device for a vehicle includes an air conditioning case with a heat exchanger, and a first door and a second door provided within the air conditioning case to control the opening degree of the air flow path, wherein the first door that drives the first door driving part; A power transmission unit connected to the first driving unit; a second driving unit that drives the second door; and a third driving unit connecting the power transmission unit and the second driving unit.

Description

Vehicle air conditioning system {AIR CONDITIONER FOR VEHICLE}

The present invention relates to an air conditioning device for a vehicle, and more specifically, to an air conditioning device for a vehicle provided in an air conditioning case and equipped with a sliding door that adjusts the opening degree of an air passage discharged into the vehicle interior.

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

1 is a cross-sectional view showing a conventional vehicle air conditioning system. As shown in FIG. 1, a conventional vehicle air conditioning device 1 includes an air conditioning case 10, a blower, an evaporator 2, a heater core 3, and temp doors 18 and 19. .

An air inlet 11 is formed on the inlet side of the air conditioning case 10, and a defrost vent 12, a face vent 13, and a floor vent are formed on the outlet side, the opening degrees of which are adjusted by the mode doors 15, 16, and 17, respectively. (14) is formed. The blower is connected to the air inlet 11 of the air conditioning case 10 and blows indoor or outdoor air.

The evaporator 2 and the heater core 3 are sequentially installed inside the air conditioning case 10 in the air flow direction. Temp doors (18, 19) are installed between the evaporator (2) and the heater core (3), and determine the opening degrees of the cold air flow path that bypasses the heater core (3) and the warm air flow path that passes through the heater core (3). By adjusting the temperature of the air discharged into the vehicle interior. The cold and warm air passing through the cold air flow path and the warm air flow path are mixed in the mixing zone and then selectively discharged into the vehicle interior through each vent.

The temp door selectively controls the air that has passed through the evaporator toward the heater core or to bypass the heater core. It is usually composed of a flat door type or a dome door type that rotates on one rotating axis. It is provided as a single piece. The air conditioning device in Figure 1 shows an example in which two temp doors (18 and 19) are provided. This example, in which two Temp doors are provided at the top and bottom, can be applied to a structure for sending air-conditioned air to the rear seat of a vehicle, or a two-layer flow structure to separate internal and external air and introduce them into the vehicle interior.

In order to explain the operating structure of the door, the Temp door of the air conditioning device in FIG. 1 is used as an example, but the door may have other structures. In addition, hereinafter, Tempdoor is referred to as a door. The first door 18 is connected to the first shaft 21 and slides by rotation of the first shaft 21, and the second door 19 is connected to the second shaft 22 and operates on the second shaft ( 22) Sliding operates by rotation. Gears may be provided on the first shaft 21 and the second shaft 22, and gear grooves that engage the gears may be formed on the first door 18 and the second door 19.

These two doors can be operated by being connected to an actuator and receiving power. However, in this case, there is a disadvantage that the number of parts increases and the manufacturing cost increases as two actuators must be provided. In the previously filed Japanese Patent Publication No. 2015-110404 (2015.06.18), two shafts that rotate two doors are connected to each other through a rack gear and pinion gear structure to operate two doors through one actuator. The structure has been disclosed.

In a conventional structure that transmits power to two driving units through a rack gear, the height of the guide rail must be lowered so that the sliding door support is pressed more to suppress leakage of the Temp door. In this case, the friction between the door and the rail increases, so power must be transmitted with greater torque to drive the sliding door.

Patent document: Japanese Patent Publication No. 2015-110404 (2015.06.18)

In order to solve such conventional problems, the present invention provides an air conditioning device for a vehicle that can drive a sliding door with higher torque by improving the gear ratio of the power transmission means.

An air conditioning device for a vehicle according to the present invention includes an air conditioning case with a heat exchanger, and a first door and a second door provided in the air conditioning case to control the opening degree of the air flow path, wherein the first door is a first driving unit that drives; A power transmission unit connected to the first driving unit; a second driving unit that drives the second door; and a third driving unit connecting the power transmission unit and the second driving unit.

In the above, a first shaft connected to the first door and moving the first door as it rotates; a rack gear connected to the first shaft; a second shaft connected to the second door and moving the second door as it rotates; and a third shaft that connects the rack gear and the second shaft to transmit power.

In the above, the power source is connected only to the first shaft, and the first door is driven by rotation of the first shaft, and the rack gear moves to rotate the third shaft, and the second shaft is driven by rotation of the third shaft. is rotated to drive the second door.

In the above, the first shaft, second shaft, and third shaft are all arranged on one side with respect to the rack gear.

In the above, the diameter of the gear portion of the third shaft is formed to be smaller than the diameter of the gear portion of the second shaft.

In the above, the rack gear is formed in a straight shape, and gear teeth meshing with the gear portion of the first shaft are formed on one side in the sliding direction, and gear teeth meshing with the gear portion of the third shaft are formed on the other side.

In the above, a cover portion for fixing the rack gear to the air conditioning case is provided.

In the above, the cover part covers all the first shaft, second shaft, third shaft, and rack gear.

In the above, the cover part has a through hole formed only on the first shaft side connected to the power source.

In the above, the first door and the second door are spaced apart from each other up and down and consist of a temp door that adjusts the opening degree of the air flow path passing through the heating heat exchanger and the air flow path bypassing the heating heat exchanger.

The vehicle air conditioning system according to the present invention can solve the problem of the door not operating smoothly due to increased friction when lowering the height of the guide rail so that the sliding door support is further pressed. Ultimately, the power of the same power source enables closer pressing between the sliding door and the support, ensuring smooth door operation and preventing air leaks more effectively.

1 is a cross-sectional view showing a conventional vehicle air conditioning system;
Figure 2 is a cross-sectional view showing a vehicle air conditioning system according to an embodiment of the present invention;
Figure 3 is a side view showing a door, shaft, and rack gear according to an embodiment of the present invention;
Figure 4 is a perspective view showing a first door, a first shaft, and a rack gear according to an embodiment of the present invention;
Figure 5 is a perspective view showing a second door, a second shaft, a third shaft, and a rack gear according to an embodiment of the present invention;
Figures 6 and 7 are side views showing an operation example of Figure 3,
Figure 8 is a side view showing a state in which a cover is coupled to an air conditioning case according to an embodiment of the present invention.

Below, the technical configuration of the vehicle air conditioning system will be described in detail according to the attached drawings.

Figure 2 is a cross-sectional view showing an air conditioning system for a vehicle according to an embodiment of the present invention, Figure 3 is a side view showing a door, shaft, and rack gear according to an embodiment of the present invention, and Figure 4 is an embodiment of the present invention. It is a perspective view showing a first door, a first shaft, and a rack gear according to an embodiment, and Figure 5 is a perspective view showing a second door, a second shaft, a third shaft, and a rack gear according to an embodiment of the present invention. .

2 to 5, the vehicle air conditioning device 100 according to an embodiment of the present invention includes an air conditioning case 110, a blower, and a first door 118 and a second door 119. It is done including. In the air conditioning case 110, a cooling heat exchanger and a heating heat exchanger are sequentially provided in the air flow direction.

The cooling heat exchanger consists of an evaporator (102) that cools the air by exchanging heat with the refrigerant of the refrigerant cycle, and the heating heat exchanger consists of a heater core (103) that heats the air by exchanging heat with the coolant and air in the coolant line circulating through the engine. ) is composed of. The heat exchanger for heating may be composed of a heat exchanger that uses condensation heat from a heat pump system, a PTC heater that operates on electricity, etc.

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

An air inlet 111 is formed on the inlet side of the air conditioning case 110, and a defrost vent 112, a face vent 113, and a floor vent 114 are provided on the outlet side, the opening degrees of which are adjusted by the mode doors 115, 116, and 117, respectively. is formed The blower is connected to the air inlet 111 of the air conditioning case 110 and performs the function of blowing indoor or outdoor air. The evaporator 102 and the heater core 103 are sequentially installed inside the air conditioning case 110 in the air flow direction.

The temperature control door (first door and second door) is installed between the evaporator 102 and the heater core 103, and has a cold air path that bypasses the heater core 103 and a By adjusting the opening degree of the hot air passage, the temperature of the air discharged into the vehicle interior is controlled. The cold and warm air passing through the cold air flow path and the warm air flow path are mixed in the mixing zone and then selectively discharged into the vehicle interior through each vent.

An example of a vehicle air conditioning device 100 according to an embodiment of the present invention is provided with two temperature control doors, a first door 118 and a second door 119. This example, in which two temperature control doors are provided at the top and bottom, can be applied to a structure for sending air-conditioned air to the rear seat of a vehicle, or a two-layer flow structure to separate internal and external air and introduce them into the vehicle interior.

The vehicle air conditioning system 100 includes a first driving unit that drives the first door 118, a power transmission unit connected to the first driving unit, a second driving unit and a power transmission unit that drive the second door 119, and a power transmission unit connected to the first driving unit. It includes a third driving unit connecting the two driving units. In this embodiment, the first driving part is made of the first shaft 121, the second driving part is made of the second shaft 122, the third driving part is made of the third shaft 123, and the power transmission part is made of the third shaft 123. It consists of a rack gear (300).

The first shaft 121 is connected to the first door 118 and slides the first door 118 as it rotates. The second shaft 122 is connected to the second door 119 and slides the second door 119 as it rotates. The rack gear 300 is connected to the first shaft 121. The third shaft 123 functions to transmit power by connecting the rack gear 300 and the second shaft 122. The first door 118 and the second door 119 are arranged vertically apart and consist of a temp door that adjusts the opening degree of the air passage passing through the heater core 103 and the air passage bypassing the heater core 103. .

The first door 118 is formed in the form of a plate with a predetermined thickness. Gear teeth 1181 are formed on both sides in the width direction of the first door 118. In the above, the vehicle width direction is the axial direction of the door. Gear teeth 1181 of the first door extend along the sliding direction of the door and engage with the first gear portion 1211 of the first shaft 121. The second door 119 is made in the form of a plate with a predetermined thickness, and gear teeth 1191 are formed on both sides in the width direction extending along the sliding direction, so that the gear portion 1221 of the second shaft 122 ) is engaged.

The first shaft 121 consists of a shaft portion formed long in the width direction, and a first gear portion 1211 and a second gear portion 1212 coupled to both ends of the shaft portion in the longitudinal direction. The first gear unit 1211 engages with the gear teeth 1181 formed on the first door 118, and as the first shaft 121 rotates, the first door 118 slides in the up and down direction. The first gear unit 1211 and the second gear unit 1212 function as pinion gears meshing with the gear teeth of the door and the gear teeth of the rack gear, respectively.

The second shaft 122 is composed of a shaft portion formed long in the width direction and a gear portion 1221 coupled to both ends of the shaft portion in the longitudinal direction. The gear unit 1221 engages with the gear teeth 1191 formed on the second door 119, and as the second shaft 122 rotates, the second door 119 slides in the up and down direction. The gear portion 1221 is engaged with the gear portion 1231 of the third shaft 123, which will be described later. Also, the second shaft 122 is not directly connected to the rack gear 300, but is indirectly connected to the rack gear 300 through the third shaft 123.

The first door 118 and the second door 119 are substantially driven by the first shaft 121 and the second shaft 122, respectively, and the rack gear 300 and the third shaft 123 are the first shaft 121 and the second door 119. It functions to transmit the power of the power source connected to the shaft 121 to the second shaft 122. By adding the third shaft 123 in this way, power can be transmitted at a higher torque than a structure in which the rack gear 300 is directly connected to the second shaft 122 through gear ratio adjustment.

Since power can be transmitted from the first shaft 121 to the second shaft 122 with a higher torque, when the height of the guide rail is lowered so that the sliding door support is further pressed, the problem of the door not operating smoothly due to increased friction is solved. It can be solved. Ultimately, the power of the same power source enables closer pressing between the sliding door and the support, ensuring smooth door operation and preventing air leaks more effectively.

In addition, by adding the third shaft 123, the sliding width of the door can be adjusted by adjusting the gear ratio, so that the degree of opening or closing of the air passage of the door can be implemented differently depending on the package size of the air conditioning case or the performance of the air conditioning device.

The power source may be composed of an actuator, etc., and is connected only to the first shaft 121 and not directly connected to the second shaft 122 and the third shaft 123. The rotation of the first shaft 121 causes the first door 118 to slide and the rack gear 300 moves up and down, that is, in the height direction, to rotate the third shaft 123. As the third shaft 123 rotates, the second shaft 122 rotates and the second door 119 slides.

The rack gear 300 is formed in a straight shape, and has gear teeth 321 meshed with the gear part of the first shaft 121, that is, the second gear part 1212, on one side in the sliding direction, and a third tooth 321 on the other side. Gear teeth 311 meshed with the gear portion 1231 of the shaft 123 are formed. In addition, the first shaft 121, the second shaft 122, and the third shaft 123 are all disposed on one side with respect to the rack gear 300. That is, the first shaft 121, the second shaft 122, and the third shaft 123 are disposed on the front side of the vehicle in the front-rear direction with respect to the rack gear 300.

Through this configuration, the width (“W” in FIG. 8) occupied by the first shaft 121, the second shaft 122, the third shaft 123, and the rack gear 300 in the front and rear direction of the vehicle can be reduced. This allows the air conditioning system package to be reduced.

Additionally, the diameter of the gear portion of the third shaft 123 is smaller than that of the gear portion of the second shaft 122. As the diameter of the gear portion of the third shaft 123 is formed to be smaller than the diameter of the gear portion of the second shaft 122, the second shaft 122, which is the driven shaft, rotates for one rotation of the third shaft 123, which is the drive shaft. Rotational torque can be improved by making one rotation per n. In this case, as the gear ratio of the second shaft gear portion and the third shaft gear portion increases, the rotational torque increases.

Figures 6 and 7 are side views showing an operation example of Figure 3.

As shown in FIG. 6, when the first shaft 121 rotates counterclockwise, the first door 118 engaged with the first shaft 121 slides upward, and at the same time, the rack gear 300 moves upward. Move to the top. The third shaft 123 connected to the lower part of the rack gear 300 rotates counterclockwise, and the second shaft 122 engaged with the third shaft 123 rotates clockwise. The second door 119 connected to the second shaft 122 slides downward. In this way, the first door 118 and the second door 119 move away from each other.

As shown in FIG. 7, when the first shaft 121 rotates clockwise, the first door 118 engaged with the first shaft 121 slides downward, and at the same time, the rack gear 300 moves downward. Go to The third shaft 123 connected to the lower part of the rack gear 300 rotates clockwise, and the second shaft 122 engaged with the third shaft 123 rotates counterclockwise. The second door 119 connected to the second shaft 122 slides upward. In this way, the first door 118 and the second door 119 move in a direction closer to each other.

Meanwhile, Figure 8 is a side view showing a state in which a cover is coupled to an air conditioning case according to an embodiment of the present invention.

Referring further to FIG. 8, the air conditioning case 110 includes a cover portion 200. The cover portion 200 is for fixing the rack gear 300 to the air conditioning case 110, and includes the first shaft 121, the second shaft 122, the third shaft 123, and the rack gear 300. Covers it all. The original function of the cover part 200 is to fix the rack gear 300, and by forming a part of the cover part that covers the shaft, it also performs the function of preventing foreign substances from entering the gear engaging part.

In addition, the cover part 200 has a through hole 205 formed only on one side, that is, at the top. The through hole 205 is formed only on the side of the first shaft 121 connected to the power source among both sides in the height direction of the cover part 200. The cover 200 is provided with a fastening part 220 for fastening to the air conditioning case 110. As the first shaft 121, the second shaft 122, and the third shaft 123 are all disposed on one side of the rack gear 300 and the rack gear 300 has a straight shape, the cover 200 The width (W) in the front and rear directions of the vehicle can be reduced.

So far, the vehicle air conditioning system according to the present invention has been described with reference to the embodiments shown in the drawings, but these are merely examples, 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 attached patent 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
121: first shaft 122: second shaft
123: third shaft 200: cover
205: Through hole 300: Rack gear

Claims (10)

In an air conditioning device for a vehicle, including an air conditioning case 110 with a heat exchanger, and a first door 118 and a second door 119 provided in the air conditioning case 110 to control the opening degree of the air flow path,
A first shaft 121 connected to the first door 118 and moving the first door 118 as it rotates;
A rack gear 300 connected to the first shaft 121;
a second shaft 122 connected to the second door 119 and moving the second door 119 as it rotates; and
It is provided with a third shaft 123 that connects the rack gear 300 and the second shaft 122 to transmit power,
A cover portion 200 is coupled to the outer surface of the air conditioning case 110 and covers the first shaft 121, the rack gear 300, the second shaft 122, and the third shaft 123. ,
An air conditioning system for a vehicle, characterized in that a through hole 205 is formed in the cover part 200 so that the shaft of the power source can be coupled to it. delete According to claim 1,
The power source is connected only to the first shaft 121, and the first door 118 is driven by rotation of the first shaft 121, and the rack gear 300 moves to rotate the third shaft 123. and the second shaft 122 is rotated by rotation of the third shaft 123 to drive the second door 119. According to claim 1,
An air conditioning system for a vehicle, wherein the first shaft 121, the second shaft 122, and the third shaft 123 are all disposed on one side with respect to the rack gear 300. According to claim 1,
An air conditioning device for a vehicle, characterized in that the diameter of the gear part of the third shaft (123) is formed to be smaller than the diameter of the gear part of the second shaft (122). According to clause 4,
The rack gear 300 is formed in a straight shape, and has gear teeth meshing with the gear portion of the first shaft 121 on one side in the sliding direction and gear teeth meshing with the gear portion of the third shaft 123 on the other side. A vehicle air conditioning system being formed. delete delete According to claim 1,
An air conditioning device for a vehicle, wherein the cover part 200 has a through hole 205 formed only on the side of the first shaft 121 connected to the power source. According to claim 1,
The first door 118 and the second door 119 are arranged vertically and spaced apart, and are characterized by being composed of a temp door that adjusts the opening degree of the air passage passing through the heating heat exchanger and the air passage bypassing the heating heat exchanger. Air conditioning system for vehicles.

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