JPS602008Y2 - Vehicle air conditioner - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vehicle air conditioner, and particularly to a shutter drive mechanism.

Vehicle air conditioners use a mix door to adjust the mixing ratio of cold air from the cooler and warm air from the heater, and then blow out the conditioned air into the passenger compartment. They are located at the upper and lower parts, and the lower air outlet is divided into a defrost air outlet and a warm air outlet.

The upper air outlet blows out an amount of cold air according to the opening degree of the first shutter located at the front of the air outlet, and the defrost air outlet and the warm air outlet are located at the branching part of both air outlets. An amount of warm air is blown out according to the opening degree of the second shutter.

Conventionally, there is a type of shutter that is driven by an actuator having a rod that performs linear reciprocating motion by the rotational force of a motor, but this requires an actuator that performs linear reciprocating motion, which reduces the number of parts. In addition, the drive mechanism becomes large and heavy, which limits the space and weight of the vehicle, and has the drawbacks of being prone to breakdowns and poor stopping position accuracy.

The present invention was made to eliminate such drawbacks.
In an air conditioner having at least a cooler and a heater, a rotary plate-like piece interlocked with a shutter for switching an air path, a gear formed along an edge of the rotary piece, and a rotary piece of the rotary piece. a worm gear that extends along the edge and meshes with the gear; a servo motor that rotates the worm gear;
At a position corresponding to the worm gear, a 0 character is formed from a facing piece protruding in the front and back directions of the rotary piece and a connecting piece facing the worm gear and connecting the facing piece, and restricts misalignment of the worm gear; A plurality of mode setting sections are provided along the rotation direction on the rotating piece at positions corresponding to the 0 font on the rotating piece, and a plurality of mode setting sections provided on the 0 font are configured to detect the and a mode detection section that detects the mode of the shutter corresponding to the rotation angle of the rotation piece.

In other words, by directly driving the rotary piece that interlocks with the shutter, the conventional wire between the shutter and the drive source is eliminated, increasing reliability. The worm gear accurately meshes with the rotary piece, and the mode detection section detects the mode of the rotary piece, thereby detecting the mode of the shutter. It is.

This will be explained in detail below using examples.

FIG. 1 is a simplified configuration diagram showing one embodiment of a vehicle air conditioner according to the present invention. In the figure, 1 is a servo motor, and a worm gear 2 constituting a first gear is attached to the rotating shaft of the servo motor. is fixed, this gear 2 extends along the edge of the rotating piece 3, and meshes with a gear 4 forming a second gear formed on the edge.

The rotating piece 3 is rotatably attached to a shaft 5, and the gear 4 is formed along a circumference around the shaft 5 as a central axis.

A cam groove 6 is provided on the opposite side of the rotating piece 3 from the gear 4, and a pin 9 of a lever 8 integrated with a shutter 7 penetrates into this cam groove 6, making it slidable.

A longitudinal rotating piece 11 pivotally connected to the shaft 10 is positioned adjacent to the rotating piece 3, and a cam groove 12 is provided at one end of the rotating piece 11.
A pin 13 protruding from the rotating piece 3 penetrates into this groove 12 and becomes slidable.

A rod 16 connected to a lever 15 of the shutter 14 extends from the other end of the rotating piece 11 .

Note that the shutter 14 adjusts the amount of air blown out from the upper air outlet of the vehicle interior, and the shutter 7 adjusts the amount of air blown out from the defrost outlet and warm air outlet in the lower part of the vehicle interior.

As shown in FIG. 2, the contact portion between the worm gear 2 and the gear 4 is surrounded by the opposing pieces 17□, 2 of the 0-shaped font 17 extending in the front and back sides of the rotating piece 3, and the connecting piece 173. To prevent worm gear 2 from separating from gear 4.

A mode setting section 18 consisting of a plurality of electrical contacts is located on the surface of the rotating piece 3 to which one opposing piece 171 corresponds, and a mode detecting section 19 is located inside the opposing piece 171.

As a result, the rotation angle of the rotation piece 3, that is, the operation mode of the shutter 7.14 can be determined by detecting which setting unit 18 corresponds to the waist mode detection unit 19 when the rotation piece 3 is rotated. By sending this detection signal to a control circuit (not shown), the control circuit compares various conditions, stops and drives the motor 1, and adjusts the shutter opening degree.

Note that contacts may be used as the mode setting section 18 and the detection section 19, or a magnet may be used as the mode setting section 18 and a magnetoresistive element may be used as the detection section 19.

According to the above configuration, the power of the servo motor 1 is directly transmitted to the rotating piece 3 via the worm gear 2 and gear 4, so the number of parts can be reduced, the mechanism is small and lightweight, and failures are less likely to occur. Become.

Furthermore, since the position of the rotary piece 3 can be directly detected, unlike the conventional mechanism that detects the position of the actuator rod, the shutter mode can be set accurately and the stopping position accuracy can be improved.

Although the present invention has been described as controlling the servo motor 1 using signals from the setting section and the detection section provided on the rotating piece 3 and the opposing piece 171, it is also possible to control the servo motor 1 by using a blower or other supplementary device to introduce outside air or inside air. Switching of machine parts may also be controlled.

Further, the rotary piece 3 is not limited to the above-mentioned embodiment, but can also be applied to an air conditioner's internal/external air switching shutter, etc.

As explained above, according to the present invention, by directly driving the rotary piece that interlocks with the shutter, the conventional wire between the shutter and the drive source can be eliminated, and reliability can be increased.
In addition, the 0 font prevents misalignment between the worm gear and the rotating piece, allowing the worm gear to mesh accurately with the rotating piece, and the mode detection unit detects the mode of the rotating piece. In this way, the shutter mode can be detected.

Furthermore, an actuator that performs reciprocating linear motion as in the past is not required, so the number of parts and failures can be reduced, and the device can be made smaller and lighter.

[Brief explanation of the drawing]

FIG. 1 is a simplified configuration diagram showing an embodiment of a vehicle air conditioner according to the present invention, and FIG. 2 is a diagram showing the main parts thereof. 1... Servo motor, 2... Worm gear, 3... Rotating piece, 4... Gear, 6
, 12...Groove, 7゜1 4...Shutter.

Claims (1)

[Scope of utility model registration request] In an air conditioner having at least a cooler and a heater, a rotary plate-like piece interlocked with a shutter for switching an air path, a gear formed along an edge of the rotary piece, and a rotary piece of the rotary piece. a worm gear that extends along the edge and meshes with the gear; a servo motor that rotates the worm gear;
At a position corresponding to the worm gear, a 0 character is formed from a facing piece protruding in the front and back directions of the rotary piece and a connecting piece facing the worm gear and connecting the facing piece, and restricts misalignment of the worm gear; A plurality of mode setting parts are provided on the rotary piece at positions corresponding to the 0 character and along the direction of rotational force, and An air conditioner for a vehicle, comprising: a mode detection section that detects a mode of the shutter corresponding to a rotation angle of the rotation piece.