JPS582081B2 - How to use this product - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a damper control device for an automobile air conditioner that opens and closes a plurality of dampers in the automobile air conditioner to obtain a desired air conditioning state, and the invention relates to a damper control device for an automobile air conditioner that opens and closes a plurality of dampers in the automobile air conditioner to obtain a desired air conditioning state. This invention was invented with the aim of obtaining such a device that can be used to open and close a plurality of dampers.

For example, in order to perform ventilation, heating, and defroster air conditioning using the automobile air conditioner shown in Figures 1 and 2, the outside air cutoff damper 1, converter damper 2, and room damper 3 may be positioned as shown in the following table. .

In the figure, 4 is the air conditioner case, 5 is the outside air inlet, 6 is the blower fan, 7 is the cold air outlet for the faces of the tower occupants, 8 is the heater core, 9 is the hot air outlet for the feet, and 10 is the This is the hot air outlet for the defroster.

Conventional damper control devices of this type can be roughly divided into a manual lever type and a power one type using engine negative pressure.

The former one-lever type device has three dampers 1, 2, and 3.
The damper is connected by wire to three levers combined with each other, and each lever is swung to open and close the damper, and the other is to open and close the damper with a single lever using a double-acting mechanism, which has been widely used recently. However, in both cases, the damper position is changed manually, so the lever operation is heavy, and the operating force required to open and close differs for each damper, making the operation feel uncomfortable, and the number of doors that can be operated is limited. There were some inconveniences such as restrictions.

The latter one-power type device, as illustrated in FIG.
The vacuum pressure on the engine intake side, which is connected to the vacuum selector 12 through the valve element 4, is communicated via the valve body to the three vacuum actuators 15, 16, and 17 that drive each damper. The device is configured to be driven in the opposite direction against the spring force that is acting to drive it in one direction.

However, this device requires a large installation space because it has many related parts such as a large vacuum actuator, and it takes time to assemble, which increases the cost.Since it includes a lever mechanism, it is troublesome to install it on the vehicle. There was an inconvenience.

The present invention provides a damper control device that does not have these disadvantages.

Embodiments of the present invention shown in FIGS. 4 to 16 will be described below.

The device of the present invention is broadly divided into a mechanical device that drives each damper and an electric device that controls starting and stopping of the mechanical device.

First, the mechanical device of the present invention will be explained with reference to FIGS. 4 to 6, which show examples.

18 is an electric motor 19 attached to the case 4 of an automobile air conditioner.
is a casing attached to the outside of the case 4 so as to cover the portion exposed from the case 4, and covers and supports the mechanical device of the present invention.

The electric motor 19 is of a double-shaft type with output shafts protruding left and right, and a blowing fan 6 is fixed to the output shaft (not shown) on the case 4 side, and the output shaft 20 on the case 18 side is fixed to the output shaft (not shown) on the case 4 side. A disc 21 for rotation transmission is fixed.

A shaft 22 is supported concentrically with the output shaft 20, and a disc 23 having the same diameter as the disc 21 is fixed to the end facing the disc 21.

24 is a disc 21 with a roller 25 rotatably attached to the tip.
, 23 by electromagnetic force. When energized, the roller 25 at the tip is projected and the disc 21, 23 is moved in and out.
23 and simultaneously rotate both discs, thereby transmitting the rotation of the output shaft 20 to the shaft 22.

Reference numeral 26 denotes an intermediate shaft that decelerates the rotation of the shaft 22 rotating at the same speed as the output shaft 20 and transmits the same to the camshaft 27. The shaft 22 and the camshaft 27 are connected by meshing of a worm and a worm gear, respectively.

The camshaft 27 has three cam plates 28 and 29 having the same diameter.
, 30 are fixed.

The cam plates 28, 29, 30 are as shown in FIGS. 6a to 6c.
Protrusions 28a, 29a protruding from one location on each outer peripheral surface
, 30a, and cam grooves 31, 3 carved on their respective upper surfaces.
2 and 33, and position the L-shaped switch abutment piece 34 fixed to the camshaft 27 and the protrusions 28a, 29a, 30a by 90 degrees out of phase with each other in the same way as the cam plate 30 etc. (Figure 6).

35, 36, 37 are shafts 3 provided parallel to the camshaft 27
pins 35a, 36a, 3 each having a roller on its cam side end;
7a is provided protrudingly, and each of these pins is connected to the cam grooves 31, 3.
2 and 33.

Further, a wire 39 connected to the outside air cutoff damper 1 is connected to the other end of the lever 35, a wire 40 connected to the diverter damper 2 is connected to the other end of the lever 36, and a wire 40 connected to the room damper 3 is connected to the other end of the lever 37. The wires 41 are connected to each other.

In some cases, rods or other links may be used in place of these wires, so in the present invention these are collectively referred to as a link mechanism.

Therefore, when the cam plates 28, 29, and 30 rotate, the levers 35, 36, and 37 rotate according to the phase of the cam grooves of each cam plate, and each damper is opened and closed accordingly.

Note that the cam groove can be modified depending on conditions such as the number of dampers.

FIG. 16 shows an example of a cam groove in which the lever is oscillated every 60 degrees and the cam grooves are the same and the cam plates 28, 29, and 30 are shared.

Next, the electric device of the present invention will be explained with reference to FIGS. 7 to 9 showing examples.

This electric device includes a rotary switch 43 as shown in FIG.
The electric motor 19 and the electromagnetic clutch 24 are connected in parallel to the power source 42 via the electromagnetic clutch 24, and microswitches 44, 45, 46, and 47 are connected between the electromagnetic clutch 24 and the fixed contact of the rotary switch 43, respectively. be.

Each microswitch has a respective pushbutton 44a, 4
The structure turns off when 5a, 46a, 47a in Fig. 6 is pressed, and as shown in Figs. toward the piece 34 and the push buttons 44a, 45a
, 46a are in the position where they are pushed in for the first time when the protrusions 28a, 29a, 30a hit, and the push button 47a is in the position where the switch contact piece 34 is pressed.
When they hit each other, they are fixed in the housing 18 at the positions where they are pushed in for the first time.

To explain the rotary switch 43, reference numeral 48 is a conductive arm fixed to a freely rotatable shaft 49, and a knob 50 also fixed to the shaft 49 has an inscription indicating the air conditioning status on an air conditioning display board 51 shown in FIG. OFF, VENT, ROOM, DE
It can be rotated by rotating it in accordance with F).

The arm 48 is connected to the power source 42 and is provided with two contacts 52, 53 at different positions in the radial direction.

When the contact 52 is rotated clockwise from the OFF position (FIG. 7), it is sequentially connected to four circular arc-shaped fixed contacts 54, 55, 56, and 57 provided to match the above-mentioned markings.
The contact 53 contacts a circular arc-shaped fixed contact 58 when the arm 48 is in the OFF position, and contacts a circular arc-shaped fixed contact 59 when the arm 48 is in the VENT-DEF position.

A microswitch 60 connects the motor 19 and the contact 54, and like the microswitch 47, it is mounted opposite the switch contact piece 34 as shown in FIG.

61 is rotated by a knob 62 in FIG.
This is a speed change switch that changes the rotation speed of the motor between high speed, medium speed, and low speed.

The electric motor 19 can sufficiently drive the camshaft 27 even at low speeds.

The operation of the apparatus of the present invention constructed as described above will be explained based on instructions from the knob 50.

1) When OFF (FIGS. 6 to 8) At this time, since the switch contact piece 34 is pushing the push button, the microswitches 47 and 60 are in the OFF state.

Therefore, the electric motor 19 and the electromagnetic clutch 24 are not energized, the dampers 1, 2, and 3 are at position a, and the air conditioner is not operated.

2) At VENT (Figures 10-11) Turn knob 50 to V.
When turned to the ENT position, the contacts 55 and 59 are connected to the power source 42, energizing the motor 19, and since each cam plate is still in the state shown in FIG. 6, the microswitch 44, which is in the ON state, is turned on. The electromagnetic clutch 24 is energized through the electromagnetic clutch 24.

Therefore, as the fan 6 and the disk 21 rotate, the roller 25 protrudes and comes into contact with the disks 21 and 23, so that each cam plate begins to rotate.

The cam plate rotates 90 degrees and the protrusion 28a presses the push button 4.
4a to cut off the power to the electromagnetic clutch 24, the tip roller 25 separates from the disks 21, 23 and is stopped.

By this 90 degree rotation of the cam plate 28, the pin 35a is guided from the small radius groove 31a of the cam groove 31 through the inclined groove 31b and moves to the large radius groove 31c, so the lever 35 is rotated counterclockwise. The outside air cutoff damper 1 is moved to position b.

The levers 36, 37 do not rotate yet.

The microswitches 47 and 60 return to the ON state.

The fan continues to rotate and blow air.

In this way, the air conditioning of the ventilation shown in the above table is obtained.

3) When in ROOM (Figures 12-13) Turn the knob 50 further and bring it to the ROOM position.
The power supply 42 is connected to the contact 56 instead of the contact 55, and is turned on.
The electromagnetic clutch 24 is energized again via the microswitch 45 in the state.

Since the electric motor 19 continues to rotate, each cam plate rotates in the same manner as described above. When the motor 19 rotates 90 degrees, the protrusion 29a presses the push button 45a, so that the electromagnetic clutch 24 is de-energized and the cam plates are rotated. Rotation stops.

Due to this 90 degree rotation of the cam plate 29, the pin 36a moves from the small radius part 32a of the cam groove 32 to the large radius part 32c via the inclined part 32b, so the lever 36 turns and the diverter damper 2 moves to the b position. .

The levers 35 and 37 do not rotate.

The microswitch 44 returns to the ON state.

The fan continues to rotate. In this way, the heating air conditioning shown in the above table is obtained.

1) At DEF (Figs. 14 and 15) When the knob 50 is turned further and brought to the DEF position, the power source 42 is connected to the contact 57 instead of the contact 56, and the micro switch 46 which is in the ON state is connected. Then, the electromagnetic clutch 24 is energized again.

Each cam plate rotates in the same manner as described above, and when it rotates 90 degrees, the projection 30a presses the push button 46a, so it stops.

Due to this 90 degree rotation of the cam plate 29, the pin 37a moves from the small radius part 33a of the cam groove 33 to the large radius part 33c via the inclined part 33b, so the lever 37 rotates and the room damper 3 moves to the b position. Move.

The levers 35 and 36 do not rotate.

The microswitch 45 returns to the ON state.

The fan continues to rotate. In this way, the air conditioning of the defroster shown in the table above is obtained.

5) When the knob 50 is further turned to the OFF position, the power supply 42 is connected to the contacts 54 and 58, and the electric motor 19 and the solenoid valve 24 are energized via the microswitches 47 and 60 which are in the ON state.

Therefore, the cam plate etc. rotates 90 degrees, and here the switch contact piece 3
4 presses the pushbuttons 47a and 60a, so the operation of the air conditioner stops.

At this time, the pins 35a, 36a, and 37a are connected to the inclined portion 3, respectively.
1d, 32d, 33d, small radius portions 31a, 32a,
33a, each damper moves to position a accordingly.

6) Since it operates as described above, no matter how you turn the knob 50 to set the desired air conditioning position, once it is set, the microswitch that energizes the electromagnetic clutch 24 will be turned off according to the set position. Each cam plate rotates until each damper moves to a position where the desired air conditioning condition is achieved.

Incidentally, no matter which direction the knob 50 is rotated, the shaft 49 and the conductive arm 48 rotate in a fixed direction determined by the rotational direction of the electric motor 19 and stop at a predetermined position.

Since the damper control device of the present invention is configured and operates as described above, 1) unlike conventional devices, there is no need to use many parts for each damper, resulting in overall cost reduction;

Further, since there is no need to provide a large vacuum actuator near the damper shaft, it is advantageous in terms of space utilization.

2) Since the tightening force to each damper is applied by a cam, it is greater and more uniform than conventional devices that utilize vacuum pressure.

Therefore, the airtightness of each damper can be maintained satisfactorily.

3) The operation can be done by simply turning the knob 50 of the switch 43 at hand, so there is no need to consider manual operating force.
You can also drive comfortably.

4) Since the control display parts such as the switches 43 and 61 are compact and can be connected to a harness, the installation location can be selected relatively freely.

5) Can be easily applied to automatic control.

6) Even if the number of cam plates is increased to open and close a larger number of dampers, there is less space-related obstruction, so it is more effective in controlling air conditioners with complex damper configurations than with conventional devices that are at the limit of space. It can be done.

etc. have great effects.

[Brief explanation of drawings]

Fig. 1 is a vertical front view showing an example of an automobile air conditioner, Fig. 2 is a longitudinal side view of the same, Fig. 3 is a plan view of a conventional damper control device that utilizes engine vacuum pressure, and Figs. 4 to 16 are ,
An embodiment of the damper control device for an automobile air conditioner according to the present invention is shown, FIG. 4 is a side view of the mechanical device of the present invention, and FIG.
The A-A sectional view in the figure, and Figures 6 a to d are plan views of the cam plate and the switch piece, where a is a view in the direction of arrow B in Figure 4, and b is the same as C.
C is the same view as D, d is the same view as E, Fig. 7 is a plan wiring diagram of the electric device, Fig. 8 is a front view of the display board, and Fig. 9 is the same as Fig. 8. FF sectional view, Figures 10-11 show the ventilation time, Figure 10 is the same diagram as Figure 6, Figure 11 is the wiring diagram, and Figures 12-13 show the heating time. Figures 14 and 15 are views similar to Figures 10 and 11 showing the defroster mode, and Figure 16 is a view similar to Figure 6 showing another embodiment of the cam groove. 1...Outside air cutoff damper, 2...Deverter damper, 3...Room damper, 4...
・Air conditioner case, 6...Fan, 19...
...Electric motor, 20... Output shaft, 24...
・Electromagnetic clutch, 27...Camshaft, 28, 29
, 30...cam plate, 35, 36, 37...
...Lever, 43...Rotary switch, 48...
...Conductive arm.

Claims (1)

[Claims] 1. A shaft 22 coupled to an output shaft 20 of an electric motor 19 for driving a blower fan 6 via an electromagnetic clutch is coupled to a camshaft 27 via a reduction mechanism, and the number of dampers to be controlled is connected to this camshaft 27. The cam plates 28, 29, 30 are fixed, and the respective cam grooves 31, 32 formed in each cam plate are fixed.
, 33 have a pin 35a provided at one end of the levers 35, 36, 37 supported on a shaft 38 parallel to the camshaft 27,
36a, 37a are engaged, and a damper is coupled to the other end of each lever 35, 3637 via a link mechanism, so that the damper can swing as the levers 35, 36, 37 swing, and the cam plate Limit switches 44, 45, 46 are connected to each cam plate 28, and are driven by protrusions 28a, 29a, 30a formed at different positions on the outer periphery of each cam plate 28, 29, 30, respectively.
, 29, 30, each limit switch 44,
Reference numerals 45 and 46 first connect the electromagnetic clutch by one of the limit switches selected and closed by a changeover switch, and then contact the protrusion of the rotating cam plate to disconnect the electromagnetic clutch. A damper control device for automotive air conditioners that stops rotation.