KR102674071B1 - Air conditioner for vehicle - Google Patents

Abstract

A vehicle air conditioning system is disclosed that interlocks two doors to operate them as a single actuator, while increasing the degree of freedom in designing the installation of the actuator. An air conditioning device for a vehicle includes an air conditioning case having a heat exchanger for cooling and a heat exchanger for heating, and a first door and a second door provided in the air conditioning case to adjust the opening degree of the air flow path, wherein the first door a first shaft connected to the door and rotating the first door according to rotation; a second shaft connected to the second door and rotating the second door as it rotates; a rack gear that connects and interlocks the first shaft and the second shaft; and an actuator gear provided in the actuator and connected to one of the first shaft, the second shaft, and the rack gear.

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 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 in the vehicle interior 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.

Figure 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 (not shown), an evaporator 2, a heater core 3, and temperature control doors 18 and 19. ), including.

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 provided 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 performs the function of blowing indoor or outdoor air.

Additionally, the evaporator 2 and the heater core 3 are sequentially installed inside the air conditioning case 10 in the air flow direction. The temperature control doors (18, 19) are installed between the evaporator (2) and the heater core (3), and open the cold air flow path that bypasses the heater core (3) and the warm air flow path that passes through the heater core (3). The temperature of the air discharged into the vehicle interior is controlled by adjusting. The cold and warm air that passes 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 temperature control 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. , is provided as a single piece. The air conditioning device in FIG. 1 shows an example in which two temperature control doors 18 and 19 are provided. This example of having two temperature control doors at the top and bottom can be applied to a structure for sending air-conditioned air to the rear seat of a vehicle, a two-layer flow structure to separate internal and external air and introduce them into the vehicle interior, etc.

In order to explain the operating structure of the door, the temperature control door of the air conditioning device in FIG. 1 is used as an example, but the door may be any other door. In addition, hereinafter, the temperature control door 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.

Meanwhile, it is possible to consider a configuration in which two shafts that rotate the two doors are connected to each other to operate the two doors through one actuator. However, this structure has a problem in that the design freedom of actuator installation is reduced because the arrangement of the actuators for operating the two doors is limited by the installation position of each door.

In order to solve such conventional problems, the present invention provides an air conditioning device for a vehicle that interlocks two doors to operate them as one actuator and increases the degree of freedom in designing the installation of the actuator.

An air conditioning system for a vehicle according to the present invention includes an air conditioning case equipped with a heat exchanger for cooling and a heat exchanger for heating, and a first door and a second door provided in the air conditioning case to control the opening degree of the air flow path. , a first shaft connected to the first door and rotating the first door according to rotation; a second shaft connected to the second door and rotating the second door as it rotates; a rack gear that connects and interlocks the first shaft and the second shaft; and an actuator gear provided in the actuator and connected to one of the first shaft, the second shaft, and the rack gear.

In the above, the actuator gear connects between one of the first shaft and the second shaft and the rack gear.

In the above, the actuator gear is spaced apart from the rack gear and is connected to one of the first shaft and the second shaft.

In the above, the actuator gear is spaced apart from the first shaft and the second shaft and is connected to the rack gear.

In the above, the first door and the second door are spaced apart from each other up and down and consist of a temperature control door that controls the opening degree of the air passage passing through the heating heat exchanger and the air passage bypassing the heating heat exchanger.

The vehicle air conditioning system according to the present invention interlocks two doors with one actuator to reduce the number of parts and manufacturing cost, and can increase the degree of freedom in actuator installation design by adding an actuator gear.

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 cross-sectional view showing a shaft, rack gear, and actuator gear according to an embodiment of the present invention;
Figure 4 is a perspective view showing a shaft, rack gear, and actuator gear according to an embodiment of the present invention;
5 to 7 are cross-sectional views showing a shaft, rack gear, and actuator gear according to a modified example of FIG. 3.

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 a vehicle air conditioning system according to an embodiment of the present invention, Figure 3 is a cross-sectional view showing a shaft, rack gear, and actuator gear according to an embodiment of the present invention, and Figure 4 is a cross-sectional view showing a vehicle air conditioning system according to an embodiment of the present invention. This is a perspective view showing a shaft, rack gear, and actuator gear according to an embodiment.

2 to 4, the vehicle air conditioning device 100 according to an embodiment of the present invention includes an air conditioning case 110, a blower (not shown), a first door 118, and a second door. It is made including (119). 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 arranged vertically spaced apart 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 that passes 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.

An air conditioning system 100 for a vehicle according to an embodiment of the present invention includes a first shaft 121, a second shaft 122, a rack gear 200, and an actuator gear 210.

The first shaft 121 is connected to the first door 118 and slides the first door 118 as it rotates. Additionally, the second shaft 122 is connected to the second door 119 and slides the second door 119 as it rotates.

The rack gear 200 connects and interlocks the first shaft 121 and the second shaft 122. The actuator gear 210 is provided in the actuator 220 and is connected to one of the first shaft 121, the second shaft 122, and the rack gear 200.

Referring to FIG. 4, a more detailed structure of the shaft, rack gear, and actuator gear will be described. Figure 4 shows the connection relationship between the first shaft, the first door, the rack gear, and the actuator gear, and the second shaft, not shown, is connected in a gear structure similar to the second door and the rack gear at the lower part on the opposite side in the vertical direction.

The first door 118 is formed in the form of a plate with a predetermined thickness. Gear grooves 1181 are formed on both sides of the first door 118 in the vehicle width direction. The gear groove 1181 engages with the gear portion 1212 of the first shaft 121 and extends along the sliding direction of the door.

The first shaft 121 is composed of a shaft portion 1211 that is long in the vehicle width direction and a gear portion 1212 coupled to both ends of the shaft portion 1211 in the longitudinal direction. As the gear unit 1212 engages the gear groove 1181 formed in the first door 118 and the first shaft 121 rotates, the first door 118 slides in the up and down direction.

Gear teeth 201 meshed with the actuator gear 210 are formed on the rack gear 200. Gear teeth 201 may be formed entirely or partially on one surface of the rack gear 201. In addition, gear teeth that mesh with the gear portion of the second shaft are formed on the lower part of the rack gear 200 on the surface facing the second shaft 122. In this embodiment, a structure in which the first shaft and the second shaft are formed on different surfaces of the rack gear has been described, but it is also possible for the first shaft and the second shaft to be arranged in the same direction on one surface of the rack gear.

The actuator gear 210 connects one of the first shaft 121 and the second shaft 122 and the rack gear 200. In this embodiment, the actuator gear 210 is coupled to the rotation axis of the actuator 220 and is disposed between the rack gear 200 and the first shaft 121.

In this case, the actuator gear 210 is not directly engaged with the gear portion 1212 of the first shaft 121, but is attached to a separate gear portion (not shown) extending from the shaft portion 1211 of the first shaft 121. It is also possible to mesh. That is, the gear portion 1212 of the first shaft 121 is disposed inside the air conditioning case, and a separate gear portion of the shaft portion 1211 is coupled to the outside of the air conditioning case to connect the first shaft 121 and the actuator gear 210. It is also possible to connect from outside the air conditioning case.

In this way, by adding an actuator gear having a tooth structure to the actuator, the actuator gear can drive the gear portion of the shaft to operate the door sliding. Through this configuration, the arrangement of the actuator can be freely changed, thereby improving the design freedom of actuator installation.

In addition, by placing the actuator gear between the rack gear and the first shaft, the rack gear and the first shaft come into direct contact with the actuator, improving the driving precision of the door due to the rotation of the actuator gear and reducing the gap between the gear parts. The backlash phenomenon caused by clearance can be minimized.

Meanwhile, FIGS. 5 to 7 are cross-sectional views showing a shaft, rack gear, and actuator gear according to a modified example of FIG. 3.

Referring to FIG. 5, the actuator gear 210 is spaced apart from the rack gear 200 and is connected to one of the first shaft 121 and the second shaft 122. In this embodiment, the actuator gear 210 is connected to the first shaft 121, and the first shaft 121 is connected to the rack gear 200. Through this configuration, the actuator gear 210 can be arranged more freely, thereby further improving the freedom of actuator arrangement design. Meanwhile, as shown in FIG. 6, the actuator gear 210 can also be connected to the second shaft 122.

Additionally, referring to FIG. 7 , the actuator gear 210 may be spaced apart from the first shaft 121 and the second shaft 122 and may be connected to the rack gear 200. The actuator gear 210 may be placed at an appropriate location between the first shaft 121 and the second shaft 122 without contacting both the first shaft 121 and the second shaft 122. Through this configuration, the actuator gear 210 can be placed in various places other than the upper and lower parts where the first and second shafts are installed, thereby maximizing the degree of freedom in designing the arrangement of the actuator.

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
200: rack gear 210: actuator gear
220: Actuator

Claims (5)

For a vehicle including an air conditioning case 110 equipped with a heat exchanger for cooling and a heat exchanger for heating, 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. In air conditioning equipment,
A first shaft 121 connected to the first door 118 and rotating the first door 118 as it rotates;
a second shaft 122 connected to the second door 119 and rotating the second door 119 according to rotation;
A rack gear 200 that connects and interlocks the first shaft 121 and the second shaft 122; and
It is provided in the actuator 220 and includes an actuator gear 210 connected to one of the first shaft 121, the second shaft 122, and the rack gear 200,
The actuator gear 210 is spaced apart from the first shaft 121 and the second shaft 122 and is connected to the rack gear 200,
An air conditioning system for a vehicle, wherein the actuator gear 210 is located in the middle of the rack gear 200 in the vertical direction. delete delete delete According to claim 1,
The first door 118 and the second door 119 are arranged vertically apart and are characterized by a temperature control 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. A vehicle air conditioning system that uses

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