JP2021079725A - Air conditioning device for vehicle - Google Patents

Abstract

To reduce compression load on packing in an air conditioning device for a vehicle which includes a rotary damper with packing.SOLUTION: In an air conditioning device for a vehicle, a rotary damper 5 includes: a shaft part 5b; a pair of side wall parts 5d connected to the shaft part 5b and orthogonal to a shaft center of the shaft part 5b; and peripheral wall parts 5e connected to edge parts of the pair of side wall parts 5d on a radial outside of the shaft part 5b so as to be movable in a radial direction of the shaft part 5b and provided with packing 5c to the outside surfaces thereof.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicle air conditioner.

Generally, the vehicle air conditioner is mounted in the front of the vehicle, and is configured to dehumidify and cool the air blown by the blower fan by the evaporator. When the vehicle air conditioner is of the air mix type, part or all of the air that has passed through the evaporator is sent to the heater core via the air mix damper to be heated, and then mixed with the remaining air to reach a predetermined temperature. It is configured to be generated in conditioned air, and the generated conditioned air is supplied to each air outlet in the vehicle interior.

Japanese Unexamined Patent Publication No. 2012-121383

The air-conditioning case of the vehicle air conditioner as described above has a defroster opening that communicates with the air outlet that discharges harmonious air toward the window panel, and communicates with the air outlet that discharges harmonious air toward the vicinity of the occupant's face. A vent opening is generally provided and a heat opening that communicates with an air outlet that discharges conditioned air toward the feet of the occupant. For example, by installing a rotary damper inside the vehicle air conditioner and adjusting the rotation angle of the rotary damper, it is possible to select from which discharge opening the harmonized air is discharged.

By the way, in the rotary damper as described above, a packing is provided at a portion of contact with the air conditioning case to improve the airtightness between the rotary damper and the air conditioning case. However, the packing comes into contact with the air conditioning case in a strongly pressed state in order to improve the airtightness. For this reason, the driving torque of the rotary damper is increased, the sliding noise between the packing and the air conditioning case when the rotary damper is rotated is increased, and the life of the packing is shortened.

The present invention has been made in view of the above-mentioned problems, and the present invention has been made in view of the above-mentioned problems. In a vehicle air conditioner provided with a rotary damper having a packing, the compressive load of the packing is applied. The purpose is to reduce.

In the present invention, as means for solving the above problems, a hollow air-conditioning case provided with a shut rib inside and the shut rib rotatably housed inside the air-conditioning case and in a closed posture. Is a vehicle air conditioner including a rotary damper having a sealing region that is abutted from the outside in the radial direction, and the rotary damper is connected to a shaft portion and the shaft portion and at the axial center of the shaft portion. A pair of side wall portions that are orthogonal to each other and a peripheral wall that is movably connected to the radial outer edge of the shaft portion of the pair of side wall portions and is provided with a packing for the outer surface. Adopt a configuration that has a part.

According to the present invention, the peripheral wall portion provided with the packing on the outer surface can be moved in the radial direction of the shaft portion with respect to the side wall portion. Therefore, when the shut rib is brought into contact with the seal region, the peripheral wall portion urged outward in the radial direction by the internal pressure is pressed inward in the radial direction and displaced. By displacing the peripheral wall portion inward in the radial direction in this way, the compressive load of the packing can be reduced, the driving torque of the rotary damper can be reduced, and the sliding between the packing and the air conditioning case when the rotary damper rotates. It is possible to reduce the dynamic noise and extend the life of the packing.

It is sectional drawing which shows the schematic structure of the air conditioner for vehicles in one Embodiment of this invention. It is a model enlarged sectional view which shows a part of the rotary damper provided in the air conditioner for vehicles in one Embodiment of this invention. It is a model enlarged sectional view which shows a part of the rotary damper provided in the modification of the vehicle air conditioner in one Embodiment of this invention. It is a model side view which shows a part of the rotary damper provided in the modification of the vehicle air conditioner in one Embodiment of this invention.

Hereinafter, an embodiment of the vehicle air conditioner according to the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view showing a schematic configuration of the vehicle air conditioner S1 of the present embodiment. As shown in this figure, the vehicle air conditioner S1 of the present embodiment includes an air conditioner case 1, an evaporator 2, an air mix damper device 3, a heater core 4, and a rotary damper 5.

The air-conditioning case 1 forms the outer shape of the vehicle air-conditioning device S1 of the present embodiment, and the cooling flow path 1a in which the evaporator 2 is installed, the heating flow path 1b in which the heater core 4 is installed, and cold air and warm air are mixed. It has a mixing portion 1c inside which is made into conditioned air. Further, the air conditioning case 1 is provided with a plurality of discharge openings (defroster opening 1d, vent opening 1e and heat opening 1f) that are exposed to the outside and communicate with the mixing portion 1c.

The defroster opening 1d is a discharge opening for supplying conditioned air to the window. Further, the vent opening 1e is a discharge opening for supplying conditioned air to the face of the occupant. Further, the heat opening 1f is a discharge opening for supplying conditioned air to the feet of the occupant.

Further, as shown in FIG. 1, inside the air conditioning case 1, a warm air opening 1 g for supplying warm air from the heating flow path 1b in which the heater core 4 is installed to the mixing portion 1c and an evaporator 2 are installed. A cold air opening 1h for supplying cold air from the cooling flow path 1a to the mixing portion 1c and a heating opening 1i for supplying cold air from the cooling flow path 1a to the heating flow path 1b are provided.

The evaporator 2 is a part of the refrigeration cycle mounted on the vehicle, and is arranged inside the cooling flow path 1a. The evaporator 2 cools the air supplied into the cooling flow path 1a by a blower (not shown) to generate cold air.

The air mix damper device 3 is arranged on the downstream side of the evaporator 2 and adjusts the supply amount of the cold air generated by the evaporator 2 to the heating flow path 1b. More specifically, the air mix damper device 3 includes an air mix damper 3a that is slidable between the cold air opening 1h and the heating opening 1i, and the air mix damper 3a provides the cold air opening 1h. The amount of cold air supplied to the heating flow path 1b is adjusted by adjusting the opening ratio with the heating opening 1i. As a result, the mixing ratio of the cold air and the warm air in the mixing unit 1c is adjusted, and the temperature of the conditioned air is adjusted.

The heater core 4 is arranged inside the heating flow path 1b, and generates warm air by heating the cold air supplied through the heating opening 1i.

The rotary damper 5 is a damper housed inside the air conditioning case 1 for selectively guiding the harmonious air to at least one of a plurality of discharge openings (defroster opening 1d, vent opening 1e, and heat opening 1f).

The rotary damper 5 is rotatably housed in the mixing portion 1c, and has a rotary damper main body portion 5a, a shaft portion 5b, and a packing 5c. The rotary damper main body 5a is a hollow member whose shape is set in a fan shape when viewed from the direction along the rotation axis of the rotary damper 5, and is formed on a pair of fan-shaped side wall portions 5d and an arc portion of these side wall portions 5d. It has a supported peripheral wall portion 5e.

The pair of side wall portions 5d are arranged so as to face each other so as to be separated from each other in the direction along the axial center of the shaft portion 5b. Each side wall portion 5d has a fan shape that extends radially around the shaft portion 5b when viewed from the direction along the axis of the shaft portion 5b. These side wall portions 5d are connected to the shaft portion 5b so that the front and back surfaces are orthogonal to the axis of the shaft portion 5b.

The peripheral wall portion 5e is erected on the radial outer edge portion of one side wall portion 5d and the radial outer edge portion of the other side wall portion 5d, and has a diameter of the shaft portion 5b with respect to the pair of side wall portions 5d. It is supported so that it can move in the direction. The peripheral wall portion 5e is curved along the outer edge of the fan-shaped side wall portion 5d, and the outer surface is a mounting surface for the packing 5c.

As shown in FIG. 2, a protruding piece 5e1 is provided at the end of the peripheral wall portion 5e in the direction along the axial center of the shaft portion 5b. The protruding piece 5e1 is a plate-shaped portion that protrudes from the peripheral wall portion 5e toward the shaft portion 5b, and is provided with an opening 5e2 that penetrates in the direction along the axial center of the shaft portion 5b. Further, a claw portion 5d1 projecting toward the projecting piece 5e1 side is provided on the radial outer edge portion of the shaft portion 5b of the side wall portion 5d. The tip of the claw portion 5d1 is inserted into the opening 5e2 of the protruding piece 5e1. The length dimension of the shaft portion 5b of the opening 5e2 in the radial direction is such that the claw portion 5d1 can move in the same radial direction, whereby the peripheral wall portion 5e can move in the same radial direction with respect to the side wall portion 5d. Has been done. With such a structure, in the present embodiment, the peripheral wall portion 5e is movably connected to the radial outer edge portion of the shaft portion 5b of the pair of side wall portions 5d in the radial direction of the shaft portion 5b.

Such a peripheral wall portion 5e is urged toward the radial outer side of the shaft portion 5b by the wind pressure inside the rotary damper main body portion 5a. Therefore, when the seal region is not pressed by the shut rib 10, the movement of the peripheral wall portion 5e is restricted by the claw portion 5d1 hanging on the inner edge of the opening 5e2 as shown in FIG. 2A. On the other hand, when the seal region is pressed by the shut rib 10, movement is restricted by the tip of the side wall portion 5d coming into contact with the peripheral wall portion 5e, as shown in FIG. 2B.

Such a rotary damper main body 5a has a peripheral wall portion 5e having an entrance / exit opening for communicating the inside of the rotary damper main body 5a with the discharge opening (defroster opening 1d, vent opening 1e and heat opening 1f). ing.

The shaft portion 5b has a hollow cylindrical shape extending along the rotation axis of the rotary damper 5, and is provided so as to project outward from the side wall of the rotary damper main body portion 5a. In the rotary damper 5, the shaft portion 5b is pivotally supported with respect to the air conditioning case 1, and the rotary damper 5 can be rotated by the mixing portion 1c.

The packing 5c is attached to the outer wall surface of the rotary damper main body 5a. The packing 5c is brought into close contact with the seal portion provided as a part of the air conditioning case 1 to seal the gap between the rotary damper 5 and the air conditioning case 1.

Such a rotary damper 5 is rotated by a drive unit (not shown), and is conditioned air for one or more of the defroster opening 1d, the vent opening 1e, and the heat opening 1f, depending on the rotation angle (movement position). To guide you.

Further, in the vehicle air conditioner S1 of the present embodiment, as shown in FIG. 1, a shut rib 10 is provided inside the air conditioner case 1 as a part of the air conditioner case 1. The shut rib 10 abuts on the packing 5c of the rotary damper 5 from the radial outside of the rotary damper 5 at an angle at which the rotary damper 5 is stopped.

The region of the rotary damper 5 that is in contact with the shut rib 10 while stopped (closed posture in which one of the discharge ports is closed) is a seal that seals the gap between the rotary damper 5 and the air conditioning case 1. It is said to be an area.

In the vehicle air conditioner S1 of the present embodiment having such a configuration, assuming that both the cold air opening 1h and the heating opening 1i are opened by the air mix damper device 3, the air is supplied to the cooling flow path 1a. The air is cooled by the evaporator 2 to be made into cold air, and a part of the cold air is supplied to the heating flow path 1b.

The warm air generated by being heated by the heater core 4 in the heating flow path 1b is supplied to the mixing section 1c from the warm air opening 1g, and the cold air not supplied to the heating flow path 1b is supplied from the cold air opening 1h to the mixing section. It is supplied to 1c. The cold air and warm air supplied to the mixing unit 1c are mixed to be conditioned air, and are guided by the rotary damper 5 from any of the defroster opening 1d, the vent opening 1e, and the heat opening 1f. It is supplied to the passenger compartment.

The vehicle air conditioner S1 of the present embodiment as described above is rotatably housed in a hollow air conditioner case 1 provided with a shut rib 10 inside and inside the air conditioner case 1 and in a closed posture. It includes a rotary damper 5 having a sealing region to which the shut rib 10 is abutted from the outside in the radial direction. Further, in the vehicle air conditioner S1, the rotary damper 5 is connected to the shaft portion 5b, the shaft portion 5b, and the pair of side wall portions 5d and the pair of side wall portions 5d orthogonal to the axis of the shaft portion 5b. It has a peripheral wall portion 5e which is connected to the edge portion in the radial direction of the shaft portion 5b so as to be movable in the radial direction of the shaft portion 5b and has a packing 5c provided with respect to the outer surface.

According to the vehicle air conditioner S1 of the present embodiment, the peripheral wall portion 5e provided with the packing 5c on the outer surface can move in the radial direction of the shaft portion 5b with respect to the side wall portion 5d. Therefore, when the shut rib 10 is brought into contact with the seal region, the peripheral wall portion 5e urged outward in the radial direction of the shaft portion 5b is pressed and displaced inward in the radial direction by the internal pressure. By displacing the peripheral wall portion 5e inward in the radial direction in this way, the compressive load of the packing 5c can be reduced, the driving torque of the rotary damper 5 is reduced, and the packing 5c and the packing 5c when the rotary damper 5 is rotated are reduced. The sliding noise with the air conditioning case 1 can be reduced, and the life of the packing 5c can be extended.

Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to the above embodiment. The various shapes and combinations of the constituent members shown in the above-described embodiment are examples, and can be variously changed based on design requirements and the like within a range that does not deviate from the gist of the present invention.

For example, as shown in FIG. 3, an inclined surface 5e3 may be provided on the protruding piece 5e1 so that the side wall portion 5d is tilted toward the inside of the rotary damper main body portion 5a by sliding the claw portion 5d1. .. By adopting such a configuration, the side wall portion 5d can be pressed against the peripheral wall portion 5e by the restoring force of the side wall portion 5d, and the peripheral wall portion 5e can be suppressed from vibrating or the like with respect to the side wall portion 5d.

Further, in the above embodiment, the configuration in which the peripheral wall portion 5e is movable with respect to the side wall portion 5d has been described. However, the present invention is not limited to this. For example, as shown in FIG. 4, a configuration is adopted in which the peripheral wall portion 5e and the side wall portion 5d are always fixed, and the side wall portion 5d can move with respect to the shaft portion 5b in the radial direction of the shaft portion 5b. You can also do it. For example, a mounting portion 5d2 that can bulge and deform outward in the radial direction is provided with respect to the side wall portion 5d, and the side wall portion 5d is connected to the shaft portion 5b via the mounting portion 5d2. As a result, when the peripheral wall portion 5e is pressed inward in the radial direction of the shaft portion 5b, the mounting portion 5d2 is elastically deformed so as to bulge outward, so that the peripheral wall portion 5e is displaced inward in the same radial direction. .. Therefore, the compressive load of the packing 5c can be reduced, the driving torque of the rotary damper 5 can be reduced, the sliding noise between the packing 5c and the air conditioning case 1 when the rotary damper 5 is rotated can be reduced, and the packing 5c can be reduced. It is possible to extend the life. The side wall portion 5d is urged outward in the radial direction by the restoring force of the mounting portion 5d2, and when the pressing of the peripheral wall portion 5e is released, the side wall portion 5d is returned to the outer side in the same radial direction.

1 ... Air conditioning case, 1a ... Cooling flow path, 1b ... Heating flow path, 1c ... Mixing part, 1d ... Defroster opening, 1e ... Vent opening, 1f ... Heat opening, 1g ... For warm air Opening, 1h ... Cold air opening, 1i ... Heating opening, 2 ... Evaporator, 3 ... Air mix damper device, 3a ... Air mix damper, 4 ... Heater core, 5 ... Rotary damper, 5a ... Rotary damper body, 5b ... shaft, 5c ... packing, 5d ... side wall, 5d1 ... claw, 5d2 ... mounting, 5e ... peripheral wall, 5e1 ... protruding piece, 5e2 ... opening 5, 5e3 …… Inclined surface, 10 …… Shut rib, S1 …… Vehicle air conditioner

Claims (1)

A rotary having a hollow air-conditioning case provided with a shut rib inside and a seal region rotatably housed inside the air-conditioning case and in which the shut rib is abutted from the radial outside in a closed posture. A vehicle air conditioner equipped with a damper.
The rotary damper is
Shaft and
A pair of side wall portions connected to the shaft portion and orthogonal to the axis of the shaft portion,
A vehicle characterized by having a peripheral wall portion that is movably connected to the radial outer edge of the shaft portion of a pair of side wall portions in the radial direction and is provided with packing for the outer surface. Air conditioner for.

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