JPH075822U - Switching door in vehicle air conditioner - Google Patents

Abstract

(57) [Summary] [Purpose] Easy to assemble, reduce ventilation resistance, and obtain stable and smooth opening and closing operation. A pair of door arms 24 and 24 are rotatably supported inside a case 2 in which two air intakes 4 and 5 are arranged close to each other, and an air intake 4 is provided between the front ends of the door arms 24. , 5 is provided with a cylindrical sealing plate 6a capable of selectively opening and closing the inner opening edge portion. The cam grooves 8 and 22 are provided on the inner surfaces of the side walls 2a and 2b of the case 2 which face each other.
A guide pin 25 movable along the cam grooves 8 and 22 and a guide groove 26 extending in the radial direction are provided on the outer surface of 4.
Between the guide groove 26 and the side walls 2a, 2b, the shaft support means 12,
The door arm 24 is rotatable and movable in the radial direction with the interposition of 23, and the space between the door arms 24, 24 is opened.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a switching door in a vehicle air conditioner that is easy to assemble, can reduce ventilation resistance, and can achieve stable and smooth opening / closing operation.

[0002]

[Prior art]

 The blower unit of the vehicle air conditioner is equipped with a plate-shaped switching door, but this door drastically changes the inflow rate of outside air due to dynamic pressure changes during driving, changing the inside air intake mode to the outside air intake mode. There was a problem that the operating force increased or decreased when switching to, and the inflow of outside air increased during high-speed running, causing outside air to flow into the vehicle compartment through the door gap above the specified value. Moreover, when trying to secure the air volume using a large door, there is a problem that vibration occurs when the door is closed and abnormal noise is generated.

On the other hand, the heater unit is also provided with similar switching doors to open and close each of the air outlets. However, in the conventional door, a part of the door generally protrudes into the air mixing chamber, which lowers the air mixing operation. However, there has been a long-felt need for these improvements.

In order to solve these problems, for example, in Japanese Utility Model Laid-Open No. 2-97109, the bases of a pair of damper arms are rotatably supported synchronously so as to face the inside and outside air intake ports, and their tip ends are supported. A cylindrical elastic seal plate is provided between the two to ensure airtightness when opening and closing the damper.

However, in this conventional device, since the damper arm is connected to the damper shaft, it is very difficult to assemble the elastic seal plate, and the damper shaft is arranged in the ventilation passage, which increases the ventilation resistance. There was a problem of inviting.

[0006]

The present invention solves such a problem, is easy to assemble, can reduce ventilation resistance, and is a switch in a vehicle air-conditioning system that enables stable and smooth opening and closing operation. Intended to provide a door.

[0007]

[Means for Solving the Problems]

 For this reason, the switching door in the vehicle air conditioner of the present invention rotatably supports a pair of door arms inside a case in which two air intakes are arranged close to each other, and a pair of door arms is rotatably supported between the front ends of the door arms. In a switching door in a vehicle air conditioner in which a cylindrical sealing plate that can selectively open and close the inner opening edge of the air intake is installed, a cam groove is provided on the inner surface of the side wall of the opposite case, and the door arm is provided. A guide pin movable along the cam groove and a guide groove extending in the radial direction are provided on the outer surface of the door, and the pivot arm is interposed between the guide groove and the side wall to move the door arm in the radial direction. In addition to making it possible, the feature is that the space between the door arms is opened, the assembly is easy, the ventilation resistance is reduced, and the opening and closing operation is stable and smooth.

[0008]

[Action]

 The door arm is rotatably supported via the guide groove and the shaft support means. The door arm can be moved in the radial direction along the guide groove. Each door arm supports at least two points of the guide pin and the shaft support means, so that the opening / closing operation of the switching door is stable and a smooth operation can be obtained. Therefore, vibration and shaking during the switching operation of the switching door are prevented, and at the time of closing, the airtightness between the seal plate and the inner opening edge portion of the air intake is maintained. The space between the door arms is opened to reduce ventilation resistance.

[0009]

【Example】

 Hereinafter, the illustrated embodiment in which the present invention is applied to a blower unit will be described. In FIGS. 1 to 4, reference numeral 1 is an air conditioning case forming an air passage, and a blower unit case 2 which is an air conditioning case is arranged upstream of the air conditioning case. The blower 3 is housed inside the case 2.

The blower unit case 2 has a pair of side walls 2a and 2b and a substantially dome-shaped peripheral surface disposed at the ends of the side walls 2a and 2b, and the inside and outside air intake ports 4 and 5 are close to the dome-shaped peripheral surface. Then, they are opened and can be opened and closed by a switching door 6 arranged inside the side walls 2a and 2b.

The side walls 2 a and 2 b are arranged so as to face each other, of which a substantially arcuate bead 7 is provided on the inner surface of the side wall 2 a, and a cam groove 8 is formed inside the bead 7. The cam groove 8 is formed along the bead 7, and as shown in FIG. 2, the cam groove 8 extends between the corresponding positions on the sides of the central portions of the inside and outside air intake ports 4 and 5 in the dome direction in the rotation direction of the switching door 6. It has an arcuate portion 8a formed substantially concentrically with the outer peripheral surface and curved portions 8b and 8c whose both sides are gently curved outward.

A concave groove 9 is formed on the inner surface of the side wall 2 a which is separated from the cam groove 8, and the groove 9 has a sector shape having an arc portion on the outside, and a through hole 10 is formed at the center portion of the sector shape at the bottom thereof. Open

A swing lever 11 is swingably accommodated in the groove 9, and a pair of pins 12 and 13 are provided on the inner surface of the lever 11 so as to project, and a rotary shaft 14 is coaxial with the pin 12 on the outer surface thereof. Is inserted into the through hole 10 and protrudes outward.

A sleeve 15 is formed at the tip of the rotary shaft 14, and a substantially half-moon shaped engaging hole 18 formed in a shaft portion 17 integrated with the drive lever 16 is fitted into the sleeve 15. . A pin 19 is provided on the outer surface of the drive lever 16 so that one end of a wire cable (not shown) is connected to the pin 19 and the other end is linked to an actuator (not shown). In the figure, 20 is a boss formed in the outer opening of the through hole 10.

A bead 21 similar to the bead 7 is projectingly provided on the inner surface of the side wall 2b at a position facing the bead 7, and an arcuate portion 22a similar to the cam groove 8 and a bent portion 22 are provided inside thereof. A cam groove 22 having a groove b and a groove 22c is formed, and on the inner surface of the side wall 2b spaced from the cam groove 22, a pin 23 is coaxial with the pin 12 having a similar function as a shaft supporting means of the door arm 24. It is protrudingly shaped. In this case, a lever similar to the swing lever 11 may be used instead of the pin 23, and the rotary shaft 14 may be fixed to the side wall 2b by an appropriate means.

On the other hand, the switching door 6 has a cylindrical seal plate 6a capable of closing the inside and outside air intake ports 4 and 5, and the plate 6a is formed concentrically with the dome-shaped peripheral surface, and both ends thereof. A pair of door arms 24, 24 are projectingly provided on the. In the figure, 38 is a seal member such as urethane attached to the surface of the seal plate 6a.

The door arm 24 is formed in a substantially T-shape, and guide pins 25, 25 are provided on the outer surface of the outer end portion of the door arm 24 in a protruding manner, and the guide pins 25, 25 are slidably inserted in the cam grooves 8, 22. A guide groove 26 is formed on the outer surface of the inner end of the door arm 24 along the radial direction, and the pins 12, 13 and 23 are inserted into the grooves 26, 26. In the figure, 27 is a partition wall that divides the periphery of the guide groove 26, and is provided so as to project on the outer surface of the inner end of the door arm 24.

In addition, in the figure, 28 and 29 are an evaporator and a heater core arranged in the air conditioning case 1, 30 is an air mix door, 31 is a vent outlet, 32 is a defroster outlet, and 33 is a foot side outlet. Doors 34, 35, and 36 are rotatably provided at the opening edge of, and each of the air outlets 31 to 33 can be opened and closed.

FIG. 5 shows another embodiment of the present invention, and the same reference numerals are used for the components corresponding to those of the above-mentioned embodiment. This embodiment shows an example in which the present invention is applied to a heater unit instead of a blower unit. For example, two vent outlets 31 and 31 are provided in the air conditioning case 1, and the inner opening edge portions of these vents are placed outside. A side wall 2a is defined by a projecting arc-shaped partition wall 37, and both side surfaces of the wall 37 in the width direction are formed with a recessed groove 9 which is sufficiently separated from the air mixing chamber 37 and accommodated in the groove 9. The base end portion of the switching door 6 can be rotated and moved in the radial direction via the swing lever 11.

That is, this embodiment is characterized in that the changeover door 6 is prevented from protruding into the air mixing chamber 37 and the decrease of the air mixing action can be prevented.

The switching door in the vehicle air conditioner thus configured does not require mounting of the damper shaft between the pivotal support portions of the door arms 24 and 24, so that the number of parts is reduced by that amount and the assembly is unnecessary. Therefore, the cost increase can be suppressed.

Next, when the switching door 6 is assembled to the blower unit case 2, the rotation shaft 14 of the swing lever 11 is inserted into the through hole 10 and the lever 11 is housed in the recessed groove 9, and then the blower unit is inserted. The switching door 6 is positioned between the side walls 2a and 2b of the case 2, and the guide pins 25 and 25 projecting from the door arms 24 and 24 are inserted into the cam grooves 8 and 22 inside the side walls 2a and 2b. Then, the pins 12 and 13 of the rocking lever 11 are inserted into one guide groove 26, and the pin 23 integrated with the side wall 2b is inserted into the other guide groove 26.

Next, the engaging hole 18 of the drive lever 16 is fitted to the end of the rotary shaft 14 protruding to the outside of the side wall 2a, that is, the sleeve 15, and the pin of the lever 16 is connected to the actuator of the wire cable. One end may be attached by an appropriate means.

As described above, when assembling according to the present invention, it is not necessary to attach a damper shaft as in the prior art, and therefore, this kind of assembling can be performed easily and quickly.

In the switching door thus assembled, the actuator is driven by the switching operation of the air conditioning mode during the air conditioning operation, and the wire cable (not shown) is interlocked with this, and the pin 19 connected to one end of the door is predetermined. Pushing and pulling in the direction, the drive lever 16 integrated with the pin 19 is rotated about the shaft portion 17.

The turning force of the drive lever 16 is transmitted to the swing lever 11 integrated with the rotary shaft 14 that fits into the engagement hole 18, and the lever 11 rotates about the rotary shaft 14. It rotates synchronously with the drive lever 16.

Therefore, the pin 13 of the swing lever 11 engages with the inner surface of the partition wall 27 and pushes and moves the door arm 24 integrated with the wall 27, so that the switching door 6 swings around the pins 12 and 23. It rotates in the same direction as the lever 11, and its seal plate 6a selectively opens or closes the inside and outside air intake ports 4 and 5.

When the inside / outside air intake ports 4, 5 are fully opened or fully closed, the guide pins 25, 25 are located at the end portions of the bent portions 8b, 8c, 22b, 22c, and the arc-shaped portions 8a, 22a. The switching door 6 is moved to the outermost side by the amount of deviation from. Therefore, when the outside air intake 5 is fully closed as shown in FIG. 2, the seal member 38 adhered to the seal plate 6a is in close contact with the inside opening edge of the outside air intake 5, and the airtightness between them is maintained. , Form an inside air intake mode.

In this case, the air introduced from the inside air intake port 4 moves inside the switching door 6 and is guided to the blower 3. However, the inside of the switching door 6 forms a wide ventilation path, and the conventional ventilation system is used. Since there are no obstacles such as a shaft, ventilation resistance is greatly reduced.

When the inside air intake mode is changed from such a situation, the actuator is driven in the reverse direction, and the switching door 6 rotates counterclockwise in FIG. 2 around the pins 12 and 23 to guide the pin. 25, 25 move from the bent portions 8b, 8c, 22b, 22c to the arcuate portions 8a, 22a.

In this case, since the arcuate portions 8a and 22a are located inside the bent portions 8b, 8c, 22b and 22c in the semi-radial direction, the guide pins 25 and 25 corresponding to the deviations are pulled in the same direction. The switching door 6 is moved toward the inside via the guide grooves 26, 26. Therefore, the seal plate 6a or the seal member 38 is gradually separated from the inner opening edge of the outside air intake 5, and a certain gap is formed between the two, so that the switching door 6 can be smoothly and lightly rotated thereafter. become.

In this way, when the guide pins 25, 25 move to the arcuate portions 8a, 22a, the switching door 6 moves in the direction of the inside air intake port 4 along the arcuate portions 8a, 22a, and the seal plate 6a moves to the outside air intake. Instead of opening the inlet 5, the inside air intake 4 begins to gradually close.

When the guide pins 25, 25 approach the end portions of the arcuate portions 8a, 22a, that is, the bent portions 8c, 22c, the pins 25, 25 are guided to the bent portions 8c, 22c and radially outward. And the switching door 6 is moved along with it. Therefore, the seal plate 6a gradually approaches the inner opening edge portion of the inside air intake 4, the sealing member 38 starts to closely contact with the inner edge portion, and the guide pins 25, 25 are bent from the bent portions 8c, 22c as shown in FIG. When it is rotated by θ to the end portions of the bent portions 8c and 22c, the inside air intake port 4 is completely closed, the airtightness of the inside opening edge is formed, and the outside air intake port 5 is formed. When opened, the outside air intake mode is formed.

As described above, the switching door 6 of the present invention is supported by the stopper pins 12 and 13 and the guide pin 25, and the pin 23 and the guide pin 25 at at least two positions on both sides of the switching door 6, so that The operation and opening / closing state are stable, the switching operation can be performed stably and smoothly, and when the inner and outer air intake ports 4 and 5 are closed, the sealing surface 6a and the inner opening edge are hermetically sealed via the seal member 38. Properties are maintained and air leakage from them to the passenger compartment is prevented.

[0035]

[Effect of device]

 As described above, the switching door in the vehicle air-conditioning system of the present invention does not require the damper shaft that connects the pivotally supporting portions of the pair of door arms, so that the number of parts is reduced and the labor for assembling them is eliminated. , It can be manufactured at low cost. In addition, the present invention provides a cam groove on the inner surface of the side wall of the opposing case, a guide pin movable along the cam groove and a guide groove extending in the radial direction on the outer surface of the door arm, and between the guide groove and the side wall. Since the door arm can be pivoted and moved in the radial direction by interposing the pivotal support means, for example, by moving the door arm inward in the radial direction when the door is closed, the airtightness at the time of closing can be improved. You can Moreover, since each door arm is supported by at least two points, that is, the guide pin and the shaft supporting means, the opening / closing operation of the switching door becomes stable and smooth, and it prevents shaking and vibration during the switching operation and at the time of closing. It is possible to maintain the airtightness between the seal plate and the mounting portion of the air intake inner opening, and prevent the airtightness from being lowered due to running dynamic pressure or wind pressure. Furthermore, the present invention has a wide air passage formed by opening the door arms, so that the ventilation resistance can be reduced compared to the conventional one in which a damper shaft is arranged between the door arms. Has a positive effect.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is an explanatory view showing an enlarged main part of the present invention.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is an exploded perspective view of a main part of the present invention.

FIG. 5 is a sectional view showing another embodiment in which the present invention is applied to a heater unit.

[Explanation of symbols]

 2 Cases 2a, 2b Side wall 4 Inside air intake 5 Outside air intake 6 Switching door 6a Seal plate 8,22 Cam groove 12,23 Shaft support means 24 Door arm 25 Guide pin 26 Guide groove

Claims (1)

[Scope of utility model registration request] 1. A pair of door arms are rotatably supported inside a case in which two air intakes are arranged close to each other,
In a switching door in a vehicle air conditioner in which a cylindrical sealing plate capable of selectively opening and closing an inner opening edge of an air intake is disposed between the front ends of the door arms, a cam is provided on an inner surface of a side wall of a facing case. A groove is provided, a guide pin that is movable along the cam groove and a guide groove that extends in the radial direction are provided on the outer surface of the door arm, and the door arm can be rotated by interposing a shaft support means between the guide groove and the side wall. A switching door in a vehicle air-conditioning system, characterized in that it is movable in the radial direction and the space between the door arms is opened.