KR102752355B1 - Air conditioner for vehicle - Google Patents

Abstract

An air conditioner for a vehicle is disclosed, which has a means for increasing the weight of a door at an optimal position to prevent door shaking due to wind pressure. The air conditioner for a vehicle includes an air conditioner case having an air passage formed therein; and a door slidably provided in the air conditioner case to adjust the opening degree of the air passage, wherein the door has a weight increasing portion that increases its own weight.

Description

{AIR CONDITIONER FOR VEHICLE}

The present invention relates to a door of an air conditioner, and more specifically, to a sliding door provided in an air conditioner case and configured to control the opening of an air passage discharged into a vehicle interior, and an air conditioner for a vehicle provided with the same.

In general, a vehicle air conditioner 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 while circulating it inside the vehicle interior. An evaporator for cooling and a heater core for heating are provided inside the air conditioner case. The vehicle air conditioner is configured to selectively blow air cooled or heated by the evaporator or heater core to each part of the vehicle interior by using a door for switching the blowing mode.

Fig. 1 is a cross-sectional view illustrating a conventional vehicle air conditioning system. As illustrated in Fig. 1, a conventional vehicle air conditioning system (1) includes an air conditioning case (10), a blower (not illustrated), an evaporator (2), a heater core (3), and a temperature control door (18, 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 (14) are formed on the outlet side, the opening of which is controlled by a mode door (15, 16, 17), respectively. A blower is connected to the air inlet (11) of the air conditioning case (10) and performs the function of blowing indoor or outdoor 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). The temperature control door (18, 19) is installed between the evaporator (2) and the heater core (3), and controls the temperature of the air discharged into the vehicle interior by controlling the opening of the cold air path bypassing the heater core (3) and the hot air path passing through the heater core (3). The cold air and the hot air passing through the cold air path and the hot air path are mixed in the mixing zone and then selectively discharged into the vehicle interior through the respective vents.

The temperature control door selectively controls the air passing through the evaporator toward the heater core or bypassing the heater core, and is usually configured as a flat door type or a dome door type that rotates on one rotation axis, and is provided as a single piece. In the air conditioning device of Fig. 1, an example in which two temperature control doors (18, 19) are provided is illustrated. Such an example in which two temperature control doors are provided in the upper and lower directions can be applied to a structure for sending air-conditioned air to the rear seat of a vehicle, a two-layer structure for introducing internal and external air separately into the vehicle interior, etc.

In the above, the temperature control door of the air conditioner was used as an example to explain the operating structure of the door, but the door may be another door. The first door (18) is connected to the first shaft (21) and slides by the rotation of the first shaft (21), and the second door (19) is connected to the second shaft (22) and slides by the rotation of the second shaft (22).

Fig. 2 is an enlarged cross-sectional view of a portion of Fig. 1. Referring to Fig. 2, the lower temperature control door (19) is slidably inserted into a support groove (71) formed on the lower surface of the air conditioning case (10). With the temperature control door (19) inserted into the support groove (71), the temperature control door (19) and the sealing surface (70) of the air conditioning case (10) are sealed by surface contact.

In a conventional vehicle air conditioner, when the maximum heating mode is operated in an environment where the outside temperature is low, a gap is generated between the temperature control door (19) and the sealing surface (70) due to deformation (contraction) of the temperature control door (19). As a result, as shown in FIG. 2, air leaks through the gap between the temperature control door (19) and the sealing surface (70), and the temperature control door (19) vibrates due to wind pressure. This phenomenon occurs particularly in an environment where the outside temperature is 0℃ or lower or the blower is at a relatively high stage such as stage 5 to 8, and ultimately causes a problem of generating a rattling noise between the temperature control door (19) and the air conditioner case (10).

In order to solve such conventional problems, the present invention provides an air conditioning device for a vehicle having a means for increasing the weight of a door at an optimal position to prevent shaking of the door due to wind pressure.

An air conditioning device for a vehicle according to the present invention comprises an air conditioning case having an air passage formed therein; and a door slidably provided on the air conditioning case to adjust the opening of the air passage, wherein the door has a weight increasing member that increases its own weight.

In the above, a cooling heat exchanger and a heating heat exchanger are sequentially provided in the air flow direction in the air passage of the air conditioning case, and the door is configured as a temp door provided between the cooling heat exchanger and the heating heat exchanger to control the air temperature.

In the above, the weight increase portion is formed on the surface opposite to the sealing surface of the air conditioning case in the thickness direction.

In the above, the door has a door body formed in a plate shape and slidably connected to the air conditioning case, and the weight increasing portion is provided in pairs symmetrically on one surface of the door body in the sliding direction.

In the above, the door has a door body formed in a plate shape and slidably connected to the air conditioning case, and the weight increasing portion is provided eccentrically to one side in the sliding direction on one surface of the door body.

In the above, the weight increaser is provided only on the side where the sealing surface of the air conditioning case is formed in the sliding direction.

In the above, the temp door is composed of an upper temp door and a lower temp door, and the weight increaser is provided in the lower temp door.

In the above, the door has a door body formed in a plate shape and slidably connected to the air conditioning case, and the weight increasing portion is formed to protrude integrally from a flat portion of the door body to increase the thickness of the door body.

In the above, the door body has gear portions formed on both sides of the door body in the axial direction, and the weight increase portion is arranged between the gear portions in the axial direction.

In the above, the door body has a first reinforcing portion extended to connect the gear portion in the center in the sliding direction, and the weight increasing portion is arranged on both sides based on the first reinforcing portion in the sliding direction.

In the above, the door body has a second reinforcing portion extended to connect the gear portions on both sides in the sliding direction, and the weight increasing portion is arranged between the first reinforcing portion and the second reinforcing portion.

In the above, the door has a door body formed in a plate shape and slidably connected to an air conditioning case, and a streamlined tension part having elasticity in the thickness direction is provided on both axial sides of the door body, and a rib protruding along a streamlined surface is provided in the tension part.

The vehicle air conditioning device according to the present invention reduces the shaking of the temp door due to wind pressure at low outside temperatures or high blower speeds, solves the problem of rattle noise, minimizes interference with the operation of the temp door, and prevents interference between the temp door and the air conditioning case.

Figure 1 is a cross-sectional view showing a conventional vehicle air conditioning system.
Figure 2 is an enlarged cross-sectional view of a portion of Figure 1.
FIG. 3 is a cross-sectional view illustrating an air conditioning device for a vehicle according to one embodiment of the present invention.
Figure 4 is an enlarged cross-sectional view of a portion of Figure 3.
FIG. 5 is a plan view illustrating a temp door according to one embodiment of the present invention.
FIG. 6 is a front view showing a temp door according to one embodiment of the present invention.
Fig. 7 is a cross-sectional view along line AA of Fig. 5.
FIG. 8 is an enlarged perspective view of a portion of a temp door according to one embodiment of the present invention.
FIG. 9 is a cross-sectional view illustrating an air conditioning device for a vehicle according to another embodiment of the present invention.
FIG. 10 is a plan view illustrating a temp door according to another embodiment of the present invention.
Fig. 11 illustrates a modified example of Fig. 7,
Figure 12 is a table showing the evaluation results of a vehicle air conditioning device according to one embodiment of the present invention.

The technical configuration of a vehicle air conditioning system is described in detail according to the attached drawings as follows.

FIG. 3 is a cross-sectional view illustrating a vehicle air conditioning device according to an embodiment of the present invention, FIG. 4 is an enlarged cross-sectional view of a portion of FIG. 3, FIG. 5 is a plan view illustrating a temp door according to an embodiment of the present invention, FIG. 6 is a front view illustrating a temp door according to an embodiment of the present invention, FIG. 7 is a cross-sectional view taken along line A-A of FIG. 5, and FIG. 8 is an enlarged perspective view illustrating a portion of a temp door according to an embodiment of the present invention.

In the following description, the left-right direction of Fig. 5 is the axial direction, the up-down direction is the sliding direction, and the protruding direction in the drawing is the thickness direction.

Referring to FIGS. 3 to 8, a vehicle air conditioning device (100) according to one embodiment of the present invention comprises an air conditioning case (110), a blower, and a temp door. The air conditioning case (110) is sequentially provided with a cooling heat exchanger and a heating heat exchanger in the direction of air flow.

The cooling heat exchanger is composed of an evaporator (102) that cools the air by exchanging heat between the refrigerant of the refrigerant cycle and the air, and the heating heat exchanger is composed of a heater core (103) that heats the air by exchanging heat between the coolant of the coolant line circulating through the engine and the air. In addition to the heater core (103), the heating heat exchanger may also be composed of a heat exchanger that utilizes the condensation heat of a heat pump system, an electrically operated PTC heater, or a combination thereof.

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 formed on the outlet side, the openings of which are controlled by mode doors (115, 116, 117), respectively. A 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 in the air flow direction in the air flow path formed inside the air conditioning case (110).

The temp door (200) is provided between the evaporator (102) and the heater core (103) to control the opening of the air passage passing through the heater core (103) and the air passage bypassing the heater core (103). The temp door (200) is composed of an upper temp door and a lower temp door spaced apart from each other vertically.

In another embodiment of the present invention, an air conditioner (100) for a vehicle is provided with two temp doors (200). This example of providing two temp doors (200) in the upper and lower directions can be applied to a structure for sending air conditioning air to the rear seat of a vehicle or a two-layer structure for introducing internal and external air separately into the interior of a vehicle.

In the present invention, a "door" is provided slidably in an air conditioning case (110) to adjust the opening of an air passage, and the door includes a temp door (200). Hereinafter, the structure of the temp door (200) will be described in detail.

The temp door (200) is formed in a plate shape and has a door body (250). The door body (250) is configured to be slidable in the air conditioning case (110). A shaft is provided within the air conditioning case (110). The shaft is connected to the door body (250) and slides the temp door (200) within the air conditioning case (110) according to rotation. The shaft is composed of a first shaft (121) connected to the upper temp door and a second shaft (122) connected to the lower temp door.

The temp door (200) is provided with a weight increasing member (300). The weight increasing member (300) functions to increase the weight of the temp door (200) itself. Since the temp door (200) is formed in a relatively thin plate shape, the temp door (200) is likely to shake when the outside temperature is below 0℃ or when the blower of the blower is at a relatively high stage of 5 to 8. The weight increasing member (300) can reduce the shaking of the temp door (200) due to wind pressure at a low outside temperature or when the blower is at a high stage, thereby solving the rattle noise problem.

The weight increasing portion (300) is formed on the opposite surface of the sealing surface (170) of the air conditioning case (110) in the thickness direction. Since the weight increasing portion (300) is positioned on the surface that does not face the air conditioning case (110) when the temper door (200) is sliding, the driving interference of the temper door (200) can be minimized. As a result, since the weight increasing portion (300) is formed on the opposite surface of the sealing surface (170) of the air conditioning case (110), interference between the temper door (200) and the air conditioning case (110) is prevented.

More specifically, the temp door (200) has a reinforcing member. The reinforcing member is formed to extend axially on at least one surface of the door body (250) in the thickness direction. The axial direction is a direction perpendicular to the sliding direction of the door. The reinforcing member has a first reinforcing member (220), a second reinforcing member (210), and a support member (230).

The door body (250) has gear parts (211, 212). The gear parts (211, 212) are formed on both sides of the door body (250) in the axial direction, and are formed on one surface of the door body (250) and meshed with the shaft.

The first reinforcing member (220) extends to connect the gear members (211, 212) on both sides of the door body (250) in the sliding direction. That is, the first reinforcing member (220) protrudes in the thickness direction of the door body (250) and is formed to extend in the axial direction. The first reinforcing member (220) is arranged inwardly in the sliding direction than the second reinforcing member (210). The first reinforcing members (220) are provided in pairs spaced apart by a predetermined distance. Preferably, the first reinforcing member (220) is arranged in the center in the door sliding direction. The first reinforcing member (220) performs the function of preventing the overall warping of the temp door (200).

The second reinforcing member (210) protrudes in the thickness direction of the door body (250) and is formed to extend in the axial direction. In addition, the second reinforcing member (210) is formed on both edges in the door sliding direction.

The second reinforcing member (210) extends to connect the gear members (211, 212) in the center of the door body (250) in the sliding direction. That is, the second reinforcing member (210) is formed to extend between the gear member (211) on one side and the gear member (212) on the other side in the axial direction. That is, the second reinforcing member (210) connects the gear members (211, 212) in the axial direction. Therefore, the gear members (211, 212) are supported in the axial direction by the second reinforcing member (210), which is more advantageous in preventing twisting.

The support member (230) is provided between a pair of first reinforcing members (220) and protrudes in the thickness direction to support the first reinforcing members (220). The support member (230) is located between a pair of first reinforcing members (220) and has the function of supporting the two first reinforcing members (220) while also having the function of suppressing distortion in the thickness direction.

Meanwhile, a tension member (240) having a streamlined shape and elasticity in the thickness direction is provided on both sides of the axial direction of the door body (250). The tension member (240) reinforces the strength of the temp door (200) and, when assembling the door, further brings the temp door (200) and the air conditioning case (110) into close contact in the thickness direction to improve airtightness. In addition, a buffer member (260) that is bent in the thickness direction is provided on both ends of the sliding direction of the door body (250). The buffer member (260) prevents damage to the temp door (200) by performing a buffering function with the air conditioning case (110) when assembling the door or operating the door.

The weight increasing parts (300) are provided in pairs symmetrically in the sliding direction on one side of the door body (250). As the weight increasing parts (300) are provided symmetrically on both sides in the sliding direction of the door, the temp door (200) has no directionality on both sides in the sliding direction, which is advantageous in terms of assembly and product mass production.

The weight increasing unit (300) is provided in the temper door (200), and preferably, the weight increasing unit (300) is provided in both the upper temper door and the lower temper door. The temper door (200) described below means both the upper temper door and the lower temper door, and the structure of the lower temper door is described as a representative example.

The temp door (200) is slidably inserted into the support groove (171) formed on the lower surface of the air conditioning case (110). With the lower temp door (200) inserted into the support groove (171), the lower temp door (200) and the sealing surface (170) of the air conditioning case (110) are sealed by surface contact. Since the weight increasing portion (300) is formed on both the upper temp door and the lower temp door, the upper temp door and the lower temp door can be used in common.

The weight increase unit (300) minimizes the occurrence of a gap between the temp door (200) and the sealing surface (170) due to deformation of the temp door (200) at low outside temperatures or high blower pressure. As a result, air is prevented from leaking through the gap between the temp door (200) and the sealing surface (170), thereby preventing the temp door (200) from shaking due to wind pressure.

In addition, the weight increasing part (300) is formed to protrude integrally from a flat portion of the door body (250) to increase the thickness of the door body (250). For example, if the thickness of the door body (250) is 0.6T when there is no weight increasing part (300), the thickness of the door body (250) equipped with the weight increasing part (300) can be formed to be approximately 0.9T. By only increasing the width in the thickness direction of the door body (250), the weight of the entire temp door (200) can be effectively increased without attaching a separate weight to the door body.

In this case, it is preferable that the protrusion width of the weight increasing portion (300) be formed lower than that of the first reinforcing portion (220) or the second reinforcing portion (210), as shown in FIGS. 6 and 7. However, the protrusion width of the weight increasing portion (300) may also be formed higher than that of the first reinforcing portion (220) or the second reinforcing portion (210), as shown in FIG. 11. FIG. 11 illustrates a modified example of FIG. 7.

If the protrusion width of the weight-increasing portion (300) is formed lower than that of the first reinforcing portion (220) or the second reinforcing portion (210), the weight of the temp door (200) can be effectively increased without increasing the overall thickness of the temp door (200), and the air conditioning performance is not reduced because it does not act as resistance to the air flow path.

In addition, the weight increase unit (300) is arranged between the gear units (211, 212) in the axial direction. By supporting between a pair of gear units (211, 212) on both sides of the weight increase unit (300) in the axial direction, axial bending deformation of the temp door (200) can be prevented and an additional effect of reinforcing rigidity can be obtained.

Meanwhile, the weight increasing parts (300) are arranged on both sides of the first reinforcing part (220) in the sliding direction. Therefore, the weight increasing parts (300) are exactly symmetrical on both sides of the temp door (200) in the sliding direction, so that they are not subject to directional restrictions during assembly and also help balance the center of gravity.

In addition, the weight-increasing member (300) is placed between the first reinforcing member (220) and the second reinforcing member (210). Therefore, both sides of the weight-increasing member (300) in the sliding direction support the first reinforcing member (220) and the second reinforcing member (210), thereby preventing the sliding direction bending deformation of the temp door (200) and obtaining an additional effect of reinforcing rigidity.

In addition, it is preferable that the tension part (240) is further provided with a rib (245). The rib (245) protrudes and extends along the streamlined surface of the tension part (240). It is preferable that the rib (245) extends entirely along the curved surface of the tension part (240). The rib (245) protrudes from the tension part (240) to partially increase the thickness direction height of the tension part (240).

For example, if the height of the tension part (240) is 4.3 mm when there is no rib (245), the height of the tension part (245) provided with the rib (245) can be formed to be approximately 4.5 mm. The rib (245) increases the height of the tension part (245), thereby increasing the sealing force between the air conditioning cases (110) and reinforcing the rigidity of the tension part (245), thereby reducing the risk of damage.

Meanwhile, the weight increasing part (300) according to a modified example of the present invention can be configured by changing the material of a part of the temp door (200). That is, the weight increasing part (300) can also be formed integrally with the temp door (200) by double-injecting a material such as rubber having a different weight from that of the door body (250) into a part of the door body (250). Through this configuration, the weight increasing effect can be further maximized compared to a configuration in which the weight increasing part is formed integrally with the temp door (200) using the same resin material.

In addition, FIG. 9 is a cross-sectional view illustrating a vehicle air conditioning device according to another embodiment of the present invention, and FIG. 10 is a plan view illustrating a temp door according to another embodiment of the present invention.

As shown in FIGS. 9 and 10, the weight increasing portion (300) may also be provided eccentrically on one side of the door body (250) in the sliding direction. That is, the weight increasing portion (300) is provided only on the side where the sealing surface (170) of the air conditioning case (110) is formed in the sliding direction.

In this way, by providing the weight increasing part (300) at the lower side of the temp door (200), compared to the above-described embodiment in which the weight increasing parts (300) are provided in a symmetrical pair, the overall weight of the temp door (200) can be lowered while effectively solving the rattle noise problem between the door and the air conditioning case.

Figure 12 is a table showing the evaluation results of a vehicle air conditioning device according to one embodiment of the present invention.

Referring to Fig. 12, in the case of the prior art without a weight-increasing member, the thickness of the flat surface of the temper door was 0.6T and the weight was 8.0g, and in the case of the present invention with a weight-increasing member, the thickness of the flat surface of the temper door was 0.9T and the weight was 10.4g. As a result of the experiment, it was confirmed that when the weight of the temper door was 8g, rattle noise was generated, and when the weight of the temper door was 9g or more, no noise was generated.

Based on these results, it was possible to confirm the correlation between the weight of the temper door and rattle noise when all other conditions are the same, and it was possible to confirm that the rattle noise is alleviated or disappears when the weight of the temper door exceeds a certain standard. The weight increasing unit (300) of the present invention was created based on the technical basis that the weight of the sliding temper door is related to rattle noise, and the present invention suggests a specific implementation method and optimal position of the weight increasing unit (300).

Up to now, the vehicle air conditioning device according to the present invention has been described with reference to the embodiments shown in the drawings, but this is merely exemplary, and anyone skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope should be determined by the technical idea of the appended 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
121: 1st shaft 122: 2nd shaft
200: Tempdoor 220: 1st Reinforcement
211,212: Gear section 210: Second reinforcement section
230: Support part 240: Tension part
245: Live
250: Door body 260: Buffer
170: Sealing surface 171: Support groove
300: Weight gain

Claims (12)

An air conditioning case in which an air passage is formed; and a door provided in the air conditioning case so as to be slidable and to adjust the opening of the air passage,
The above door is provided with a weight increasing member that increases its own weight.
The above door has a door body formed in a plate shape and slidably connected to the air conditioning case,
The above weight-increasing member is provided in pairs symmetrically in the sliding direction on one side of the door body,
The above door body has a gear part formed on both sides of the door body in the axial direction,
The above weight increasing portion is arranged axially between the gear portions,
The above door body has a first reinforcing portion extended to connect the gear portion in the central portion in the sliding direction,
The above weight-increasing portion is arranged on both sides of the first reinforcement portion in the sliding direction,
The above door body has a second reinforcing part extended to connect the gear parts on both sides in the sliding direction,
The above weight-increasing part is placed between the first reinforcing part and the second reinforcing part,
The above first reinforcing part, second reinforcing part, and gear part all protrude in the same direction on one side of the door body,
An air conditioner for a vehicle, characterized in that the weight-increasing portion is formed in a space surrounded by the first reinforcing portion, the second reinforcing portion, and the gear portion, and is formed to protrude on one surface of the door body in the same direction as the protrusion direction of the first reinforcing portion, the second reinforcing portion, and the gear portion. In the first paragraph,
A cooling heat exchanger and a heating heat exchanger are sequentially provided in the air flow direction of the air conditioning case.
The above door is a vehicle air conditioning device configured as a temp door that is provided between the cooling heat exchanger and the heating heat exchanger to control the air temperature. In the first paragraph,
An air conditioner for a vehicle, characterized in that the weight increasing portion is formed on a surface opposite to the sealing surface of the air conditioner case in the thickness direction. delete delete delete In the second paragraph,
The above temp door consists of an upper temp door and a lower temp door.
An air conditioning system for a vehicle, characterized in that the weight increasing part is provided in the lower temp door. In the first paragraph,
An air conditioner for a vehicle, characterized in that the weight-increasing member is formed to protrude integrally from a flat portion of the door body to increase the thickness of the door body. delete delete delete In the first paragraph,
A streamlined tension section having elasticity in the thickness direction is provided on both sides of the axial direction of the door body,
An air conditioning device for a vehicle, wherein a rib protruding along a streamlined surface is provided in the tension section.

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