JPH0242685B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an air conditioning mode switching device in an automotive air conditioner, and more specifically, to an air conditioning mode switching device for switching an air conditioning mode with a small operating force. The present invention relates to a mode switching device that enables

(Prior art and problems to be solved by the invention) Conventionally, the air conditioning modes in automotive air conditioners have been a heater mode in which all air from the evaporator is sent to the heater core and warm air is blown into the room, and a heater mode in which all air from the evaporator is sent to the heater core and warm air is blown into the room. There are various modes, including a cooler mode that blows cold air into the passenger compartment without passing it through the heater core. Here, the vent door is closed in the heater mode, and the floor door is closed in the cooler mode. During air conditioning, the fan motor rotates, and each door receives pressure from the wind sent from the fan. For example, when switching the air conditioning mode from heater mode to cooler mode, the vent door increases the wind pressure. On the other hand, when switching from cooler mode to heater mode, the vent door is closed and the previously closed floor door is opened, which causes the floor door to receive a large amount of wind pressure. Therefore, when the operator operates the air conditioning mode switching lever to open and close each door, especially when the fan motor is rotating at high speed and the wind pressure on each door is at its maximum, the operation when switching the air conditioning mode will be difficult. This requires the operator to apply an extremely large amount of force to the air conditioning mode switching lever.

The present invention has been made to solve these conventional problems, and by slowing down the fan motor when switching the air conditioning mode, the wind pressure applied to each door is reduced, and the air conditioning mode switching operation is improved. The purpose of the present invention is to provide an air conditioning mode switching device that facilitates switching.

[Structure of the invention]

(Means for Solving the Problems) The present invention for achieving the above-mentioned object includes a fan motor for sending air into the vehicle interior, and a fan motor for distributing the air sent out by the fan motor to various parts in the vehicle interior. The air conditioning mode switching door has a cantilevered air conditioning mode switching door with one end rotatably supported, and an air conditioning mode switching lever that is mechanically connected to the air conditioning mode switching door and is operated when switching the air conditioning mode. In the automotive air conditioner, which opens and closes the switching door to switch the air conditioning mode by mechanically transmitting the operating force of the air conditioning mode switching lever to the air conditioning mode switching door. The present invention is characterized by comprising a deceleration device that temporarily decelerates the fan motor in synchronization with the operation.

The speed reduction device may include a cutoff circuit that temporarily cuts off power supply to the fan motor in synchronization with the operation of the air conditioning mode switching lever.

Further, the speed reduction device may be configured with a shot circuit that temporarily shoots the fan motor in synchronization with operation of an air conditioning mode switching lever.

Furthermore, the speed reduction device may be configured with an inverting circuit that temporarily reverses the polarity of the power applied to the fan motor in synchronization with the operation of the air conditioning mode switching lever. In this case, faster deceleration is performed, so the wind pressure applied to the air conditioning mode switching door can be reduced in a short time.

Further, the speed reduction device includes a switch that is linked to the operation of the air conditioning mode switching lever,
It is also possible to configure the fan motor to be decelerated by switching this switch.

(effect) The operation of the present invention will be explained below.

When the operator operates the air conditioning mode switching lever to switch the air conditioning mode, the deceleration means temporarily decelerates the fan motor in synchronization with this operation.
As a result, the wind pressure applied to the air conditioning mode switching door is also temporarily reduced, and the air conditioning mode switching lever can be operated with relatively little force.

If the reduction gear temporarily cuts off the power supply to the fan motor in synchronization with the operation of the air conditioning mode lever, power will not be supplied to the fan motor from the time the air conditioning mode is switched until the next air conditioning mode is set. Therefore, in this case as well, the air conditioning mode switching lever can be operated with relatively little force.

In addition, if the speed reduction device shoots the fan motor circuit in synchronization with the operation of the air conditioning mode lever, the fan motor will reduce its own rotational force using the electric power generated by the rotation of the fan motor itself. is performed rapidly, and the air conditioning mode switching lever can be operated with even less force.

Furthermore, if the deceleration device is configured with an inverting circuit that temporarily reverses the polarity of the power applied to the fan motor in synchronization with the operation of the air conditioning mode lever, it is possible to obtain an even greater deceleration effect than that described above. , it is possible to reduce the operating force immediately after operating the air conditioning mode switching lever.

(Example) Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings. In addition, the same reference numerals are given to the same members in the figures.

In FIG. 1, a power source 10, a motor 20 for rotating a fan (not shown), and a switch 30 are shown.
and a middle resistor 4 that controls the motor 20 at medium speed.
1 and a low resistor 42 connected to a middle resistor 41 to control the motor 20 at a low speed are connected in series, respectively, and a fan switch 43 for switching the fan speed is provided. Further, the air conditioning mode switching lever 50 is configured to rotate around a shaft 51, and has a knob 52 provided at one end thereof and a wire 54 attached to the other end 53. On the opposite side of the wire 54 is a floor door 55.
is attached, and the floor door 55 opens and closes in accordance with the movement of the wire 54. Although the lever 50 is illustratively shown with one wire and one door, in reality it may have several wires attached to it or may be configured to control each door, such as a vent door, via a separate link. It is set as. Further, the lever 50 has a structure in which a conductor is attached to connect and connect the terminal board 31 and the terminal board 32, or the lever itself is a conductor. In addition, in the figure, 56 is the instrument panel, and 57 is the floor duct 58.
It is a bulkhead that separates the Further, the switch 30 has two terminal plates 31 and 32, and the terminal plate 31 is coated with copper. A cooler mode terminal 32C is provided on the terminal plate 32 at a position where the lever 50 comes into contact with the lever 50 when the lever 50 is in the cooler mode position.
and a heater mode terminal 32h provided at a position that contacts the lever 50 when the lever 50 is in the heater mode position are illustrated, and other air conditioning mode terminals are actually provided as well. An equivalent circuit of the embodiment shown in FIG. 1 is shown in FIG.

Next, the operation of the embodiment shown in FIG. 1 will be explained.

When the lever 50 is in the solid line position, the air conditioning mode is set to cooler mode;
At this time, the floor door 55 is closed.
At this time, when the motor 20 is rotating at high speed, the floor door 55 is subjected to large wind pressure as shown by the white arrow. The motor 20 rotates because the terminal plate 31 and the cooler mode terminal 32c are connected to the lever 50 in the above structure. Further, in this case, the wire 54 has some play, so that the floor door 55 will not open even if the wire 54 is pulled a little. Here, the knob 52 of the lever 50 is moved to the right as shown by the thin arrow, and set to the intermediate position 32m shown by the dashed line. At this time, the floor door 55 remains closed due to the play in the wire 54, and the lever 50 comes into contact with the insulator of the terminal board 32.
The circuit of motor 20 is opened. Therefore, the rotation of the motor 20 is reduced, the wind pressure on the floor door 55 is reduced, the resistance when moving the lever 50 is also reduced, and the lever 50 can then be moved to open the floor door 55 and shift to the heater mode. becomes easier.

FIG. 3 shows another embodiment of the invention. While the embodiment shown in FIG. 1 shuts off the power to the fan motor 20 at one point when switching the air conditioning mode, the embodiment shown in FIG. 3 temporarily shuts off the fan motor 20 when switching the air conditioning mode. This is to forcibly decelerate the motor 20. A major difference between the embodiment shown in FIG. 3 and the embodiment shown in FIG. 1 is that switch 30 is replaced by switch 60.

The switch 60 has a terminal plate 61 whose entire surface is coated with copper and a terminal plate 62 where terminal plates are scattered.
The terminal plate 62 includes a cooler mode terminal 62c provided at a position that contacts the conductive portion of the lever 50 when the lever 50 is in the cooler mode position, and a cooler mode terminal 62c provided at a position that contacts the conductive portion of the lever 50 when the lever 50 is in the heater mode position. Examples include a heater mode terminal 62h provided at a position in contact with the conductive part, and an intermediate terminal 62m provided in a position in contact with the conductive part of the lever 50 when the lever 50 is in an intermediate position between each mode position. is shown. However, in reality, other air conditioning modes will also be considered, and terminals for those modes and intermediate terminals for them will be provided. Further, the terminal plate 61 is connected to one side of the motor 20, the intermediate terminal 62m is connected to the + side of the motor 20 via a resistor 63, and the mode terminal 62m is connected to the + side of the motor 20 via a resistor 63.
c and 62h are connected to the middle resistor 41. This equivalent circuit is shown in FIG.

Next, the operation of the embodiment shown in FIG. 3 will be explained.

When the lever 50 is in the cooler mode position shown by the solid line, the motor current flows through the terminal plate 61, the conductive part of the lever 50, the cooler mode terminal 62c, and the switch 4.
3, and the door 55 receives a large wind pressure from the fan. However, when the lever 50 is moved to the position indicated by the dashed line, the drive current of the motor 20 is cut off, and the motor 20 is shot via the terminal plate 61, the conductive part of the lever 50, the intermediate terminal 62m, and the resistor 63. The motor 20 is braked and decelerated rapidly. Therefore, less force is required to open the door 55, and it becomes easy to switch to another mode, that is, the heater mode.

FIG. 5 shows another embodiment of the invention. In the embodiment shown in FIG. 5, the fan motor 20 is reversely connected to the power source and the motor 20 is decelerated and braked when changing the mode.

The switch 70 has two terminal plates 71 and 72. The mode switching lever 501 has two mutually independent conductive parts 501a and 502b.
The terminal board 71 includes a common terminal 71a connected to one pole of the motor 20, and a common terminal 71a connected to one pole of the motor 20, and a common terminal 71a connected to the lever 501 when the lever 501 is set to the cooler mode position.
When the lever 501 is set to the heater mode position, the cooler mode terminal 71c is provided at a position in contact with the conductive portion 501a of the
The heater mode terminal 71h provided at a position in contact with the conductive part 501a of 01 and the conductive part 501a when the lever 501 is in the middle of each mode position.
An intermediate terminal 71m in contact with is provided.
The terminal board 72 also includes a common terminal 72a that is connected to the other pole of the motor 20, and a common terminal 72a that connects the lever 501 to the heater mode position.
A heater mode terminal 72h is provided at a position in contact with the conductive portion 501b, and an intermediate terminal 72m is provided in contact with the conductive portion 501b when the lever 501 is in the middle of each mode position. Furthermore, terminals 71c and 71h for each mode and intermediate terminal 7
2m is grounded, and each mode terminal 72c, 72
h is connected to the resistor 41. This equivalent circuit is shown in FIG.

Next, the operation of the embodiment shown in FIG. 5 will be explained.

When the lever 501 is in the cooler mode position shown by the solid line, the motor current flows through the terminal 71c and the conductive part 50.
1a, common terminal 71a, motor 20, common terminal 7
2a, conductive part 501b, terminal 72c switch 43
The motor 20 rotates normally, and at this time the door 55 receives a large wind pressure from the fan. Now, when the lever 501 is moved to the position indicated by the dashed-dotted line, the motor current is transferred to the intermediate terminal 72m, the conductive part 501b, and the common terminal 7.
2a, motor 20, common terminal 71a, conductive part 50
1a, intermediate terminal 71m, and ground, and as the motor 20 attempts to reverse, the motor 20 is braked and rapidly decelerated. Therefore, the wind pressure on the door 55 is reduced, less force is required to open the door 55, and switching to another mode, ie, heater mode, is facilitated.

The power cutoff circuit, the motor shot circuit, and the circuit for reversing the motor polarity in the above embodiment can be considered as a deceleration device that decelerates the fan motor 20. Further, in the above embodiment, the case where the air conditioner is switched from the cooler mode to the heater mode has been described, but the present invention is not limited to this. Of course, the present invention can be applied to any door as long as there is a door that is shifted from the open state to the opened state.

〔Effect of the invention〕

As is clear from the above explanation, in the present invention, the fan motor is decelerated in the middle of switching the air conditioning mode, so the wind pressure against the door when switching the air conditioning mode is reduced, and the fan motor setting is reduced. The air conditioning mode can be easily switched regardless of the speed at which the air conditioning mode is switched, and the operability when switching the air conditioning mode is improved.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of the present invention, FIG. 2 is an equivalent circuit diagram of the embodiment shown in FIG. 1, and FIG. 3 is a schematic diagram showing another embodiment of the present invention. 4 is an equivalent circuit diagram of the embodiment shown in FIG. 3, FIG. 5 is a schematic diagram showing another embodiment of the present invention, and FIG. 6 is an equivalent circuit diagram of the embodiment shown in FIG. It is an equivalent circuit diagram of an example. 20... Fan motor, 30, 60, 70... Switch (reduction device), 41... Middle resistor, 43...
Fan switch, 50, 501...Air conditioning mode switching lever, 55...Floor door (air conditioning mode switching door).

Claims (1)

[Scope of Claims] 1. A fan motor for sending air into the vehicle interior, and a fan motor that distributes the air sent out by the fan motor to various parts of the vehicle interior, and one end of which is rotatably supported. It has a cantilevered air conditioning mode switching door, and an air conditioning mode switching lever that is mechanically connected to the air conditioning mode switching door and is operated when switching the air conditioning mode. In an automotive air conditioner that switches the air conditioning mode by opening and closing the switching door, the fan motor is temporarily decelerated in synchronization with the operation of the air conditioning mode switching lever. 1. An air conditioning mode switching device for an air conditioner for an automobile, characterized in that the device is equipped with a speed reduction device that allows the mode to change. 2. The air conditioning mode switching device according to claim 1, wherein the speed reduction device includes a cutoff circuit that temporarily cuts off power supply to the fan motor in synchronization with operation of the air conditioning mode switching lever. 3. The air conditioning mode switching device according to claim 1, wherein the speed reduction device includes a shot circuit that temporarily shoots the fan motor in synchronization with operation of the air conditioning mode switching lever. 4. The air conditioning mode switching device according to claim 1, wherein the speed reduction device comprises an inverting circuit that temporarily reverses the polarity of the power applied to the fan motor in synchronization with the operation of the air conditioning mode switching lever. . 5. The speed reduction device includes a switch that is linked to the operation of the air conditioning mode switching lever, and when the switch is switched, the fan motor is slowed down. air conditioning mode switching device.