JPH09164836A - Electric driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily detect the displacement of a movable member without applying excessive load on a motor by providing a displacement detecting means for judging if the movable member is displaced or not to a specified position based on the displacement information of the movable member before current carrying to the motor this time and the change in the current of the detection motor. SOLUTION: If the change of a suction port mode is directed, current carrying to a blowing-out port changing motor 30 is directed such that the mode is opposite to a mode memorized in a memory 306a (inside air mode, outside air mode). Next, the current carrying directing is continued until the position signal from a detection circuit 309 (sent out by the increase in the consumption current of a motor driver 308) is detected after the position signal is not detected for some time and then an inside/outside damper is changed to a specified position side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric drive device for driving a movable member such as a damper by a motor.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 14, a damper for switching between an outside air intake position and an inside air circulation position, a servomotor 901 whose motor shaft slowly rotates by a reduction gear, and a damper connected to the motor shaft. A / C that detects the position of the damper based on the voltage Vp and the variable resistor 902 that is directly connected to the lever that drives the servo motor 903 and that drives the servo motor 901 via the motor driver 903.
A damper drive device J including an ECU 904 is known {Prior Art 1}.

Further, Japanese Patent Laid-Open No. 63-83571 discloses that
There is described a motor type damper device in which a stopper that locks a motor is provided when the baffle comes to an open / closed position, and a position of the baffle is detected by detecting a current change when the motor is locked {Prior Art. 2}.

[0004]

In the prior art 1, the contacts of the variable resistor 902 need to be gold-plated, for example, in consideration of the automobile environment (temperature is -40 ° C to 85 ° C), durability, etc. Takes. In the prior art 2, the rotation of the motor is stopped by the stopper for a short time, so that a large current flows and the motor is burdened and inferior in durability. In addition, it is not possible to set the baffle position at multiple locations.

A first object of the present invention is to provide an inexpensive electric drive device capable of easily detecting whether or not the movable member is displaced to a predetermined displacement point without imposing an excessive load on the motor. In offer.

A second object of the present invention is to inexpensively make it possible to reliably stop the movable member at a target stop position (a damper target rotation position) without imposing an excessive load on the motor. The purpose is to provide an electric drive device.

[0007]

In order to solve the above-mentioned problems,
The present invention employs the following configuration. (1) A motor having a deceleration mechanism, a movable member that is connected to a motor shaft for decelerating rotation and is driven, and one or more kinds of displacement points are set, and the motor when the movable member is displaced to the displacement point. Load member arranged so as to increase or decrease the load applied to the motor, motor current detection means for detecting a current flowing through the motor, displacement information of the movable member before the motor is energized this time, and detection. Displacement detecting means for detecting whether or not the movable member is displaced to a predetermined displacement point based on a change in motor current.

(2) A motor having a deceleration mechanism, a movable member which is connected to a motor shaft for decelerating rotation and is driven, and at which a plurality of displacement points are set, and when the movable member is displaced to the displacement points, A plurality of load members arranged so that a load defined for each displacement point is applied to the motor, a motor current detecting means for detecting a current flowing through the motor, and a displacement of the movable member based on the magnitude of the detected motor current. And a displacement detecting means for detecting whether or not the point is displaced.

(3) A motor having a speed reduction mechanism, a movable member which is connected to a motor shaft for decelerating rotation and driven, and at least one kind of displacement point is set, and the movable member,
A load member assembled to the speed reducing mechanism so as to cause torque fluctuations a plurality of times during displacement from one displacement point to the next displacement point, motor current detection means for detecting a current flowing through the motor, and the motor And a displacement detection unit that detects whether or not the movable member is displaced to a predetermined displacement point based on the displacement information of the movable member before the current is energized and the number of times the motor current fluctuates.

(4) A motor having a deceleration mechanism, a movable member which is connected to a motor shaft for decelerating rotation and is driven, and at which one or more stop positions are set, and the movable member is located at the stop position. Just before the time or position,
A rotation suppressing member arranged so as to suppress the rotational force of the motor, motor current detecting means for detecting a current flowing through the motor, and stop position information of the movable member before the motor is energized this time. Motor energization control means for stopping the movable member at a target stop position based on an increase change in the detected motor current.

(5) A motor having a deceleration mechanism, a link which is directly connected to a motor shaft for decelerating rotation, and rotates, a damper which is connected to the link and has a plurality of rotational positions set, and the damper. Detects a current flowing in the motor and a plurality of link restraint members arranged on the motor side so as to contact the link and restrain the movement of the link when or immediately before the turn position comes to the turning position. Motor current detection means, motor energization control means for stopping the damper at a target rotational position based on the rotational position information of the damper before energizing the motor this time, and the number of times the detected motor current has increased. Have.

[0012]

With respect to claim 1, the load member is arranged such that the load applied to the motor is increased or decreased when the movable member connected to the motor shaft for decelerating rotation and driven is displaced to the displacement point.

The motor current detecting means detects the current flowing through the motor, and when the movable member is displaced to the displacement point, the current flowing through the motor rapidly increases or decreases. Displacement detection means is the displacement information of the movable member before energizing the motor this time {Which displacement point was located or between which displacement point}
And whether the movable member is displaced to a predetermined displacement point based on the increase / decrease change (or increase / decrease frequency) of the detected motor current.

[Claim 2] When the movable member, which is connected to the motor shaft for decelerating rotation and is driven, is displaced at each displacement point, the load applied to the motor becomes a load amount determined at each displacement point. Are arranged.

When the movable member is displaced to the displacement point, a predetermined amount of load is applied to the motor, and the current flowing through the motor increases (or decreases) to a value according to the load amount. The motor current detecting means detects a current flowing through the motor. The displacement detecting means detects to which displacement point the movable member is displaced based on the magnitude of the current flowing through the motor.

[Claim 3] The load member is arranged so that the movable member, which is connected to the motor shaft for decelerating rotation and is driven, undergoes a plurality of torque fluctuations during the displacement from one displacement point to the next displacement point. Is attached to the speed reduction mechanism. While the movable member is displaced from a certain displacement point to the next displacement point, the current flowing through the motor fluctuates a predetermined number of times (equal to the number of torque fluctuations).

The displacement detecting means is arranged to detect the displacement information of the movable member before energizing the motor this time (at which displacement point it is located,
Or between which displacement points}, and whether the movable member is displaced to a predetermined displacement point or not is detected based on the number of fluctuations of the current detected by the motor current detection means.

[Claim 4] The rotation suppressing member is arranged so that the rotating force of the motor is suppressed when the movable member connected to the motor shaft to be driven reaches or approaches the stop position. Therefore, when the movable member reaches or approaches the stop position, the load applied to the motor increases, so that the current flowing through the motor increases.

The motor current detection means detects the current flowing through the motor, and when the movable member reaches or approaches the stop position, the detected motor current increases rapidly. The motor energization control means grasps the current position of the movable member based on the stop position information (stop position) of the movable member before energizing the motor this time and the increase change (or the number of increase changes) of the detected motor current,
When it is determined that the movable member has reached or approached the target stop position, the power supply to the motor is stopped and the movement of the movable member is stopped.

[Claim 5] When the damper reaches or approaches the rotating position, a plurality of link restraining members are provided on the motor side so as to come into contact with the link and restrain the movement of the link. The motor current detecting means detects a current flowing through the motor. When the damper reaches or approaches the rotational position, the load on the motor increases, so that the current flowing through the motor increases.

The motor energization control means determines the current position of the damper based on the rotational position information (rotational position) of the damper before the motor is energized this time and the increase change (or the number of increase changes) of the detected motor current. If it is grasped and it is determined that the damper has reached or is about to reach the target rotational position, the motor is de-energized to stop the damper from rotating.

[0022]

【The invention's effect】

[Claim 1] The displacement detecting means detects whether or not the movable member is displaced to a predetermined displacement point based on the previous displacement information of the movable member and the change (or the number of changes) of the motor current. Therefore, no variable resistor or switch is required. {Technology that detects the displacement form of a movable member using a variable resistor or switch requires the use of a contact material with excellent weather resistance and durability, which is costly.} Therefore, it is possible to inexpensively manufacture the electric drive device that can detect that the movable member is displaced to the predetermined displacement point.

When the movable member is displaced to the displacement point, the load applied to the motor is increased or decreased, so that the motor does not stop and the motor is not overloaded.
Also, a plurality of displacement points for observing the displacement state of the movable member,
Can be set.

[Claim 2] When a movable member is displaced to a displacement point, a plurality of load members are arranged so that a load amount determined for each displacement point is applied to the motor, and which displacement point the movable member is displaced to is determined. Since the form detecting means detects the size of the detected motor current, it has the following advantages.

(1) Since the displacement information of the movable member at the end of the previous drive is not required (it is not necessary to store the displacement information of the movable member at the end of the previous drive), only the motor current needs to be detected. It is possible to manufacture an electric drive device that can detect at which displacement point the movable member is displaced at a lower cost.

(2) The motor is not overloaded and a plurality of displacement points for observing the displacement state of the movable member can be set. {The load amount determined for each displacement point is applied to the motor. Only because it does not stop the motor}.

[Claim 3] While the movable member is displaced from one displacement point to the next displacement point, the load member is assembled to the speed reduction mechanism so that torque fluctuations occur a plurality of times in the motor, and the previous drive is performed. Since the displacement detecting means detects whether or not the movable member is displaced to the predetermined displacement point based on the displacement information of the movable member and the number of times of current fluctuations at the end, it has the following advantages.

(1) No need for a variable resistor or switch, etc. {In the technique of stopping a movable member at a stop position using a variable resistor, switch, etc., it is necessary to use a contact material having excellent weather resistance and durability. Therefore, it is possible to inexpensively manufacture an electric drive device capable of detecting whether or not the movable member is displaced to a predetermined displacement point.

(2) Since the motor is not stopped, the motor is not overloaded. (3) Multiple displacement positions of the movable member can be set. (4) A large force is not applied to the load member {Because the load member is assembled in the high rotation and low torque part (reduction mechanism)},
Less wear of load members.

[Claim 4] (1) The motor energization control means is moved by the stop position information (stop position) of the movable member at the end of the previous drive and the increase change in the motor current detected by the motor current detection means. The configuration is such that the current position of the member is grasped and the member is stopped at the target stop position.

Therefore, no variable resistor or switch is required. {In the technique of stopping the movable member at the stop position using the variable resistor or switch, it is necessary to use a contact material having excellent weather resistance and durability. It is costly, and it is possible to inexpensively manufacture an electric drive device that can stop the movable member at a target stop position.

(2) Since the rotation suppressing member is arranged so as to suppress the rotational force of the motor immediately before or after the movable member is at the stop position, the motor is not stopped. It is possible to set multiple stop positions without burdening the user.

(3) Since the rotation suppressing member is arranged so that the rotational force of the motor is suppressed even when the movable member is located at the stop position or immediately before it is located, the stop position of the movable member is prevented from being exceeded. {Because the rotation speed of the motor decreases.}

[Claim 5] (1) Based on the rotational position information (rotational position) of the damper at the end of the previous drive and the motor current detected by the motor current detection means, the motor energization control means determines the current damper status. The position of the damper is grasped and the damper is stopped at the intended stop position. Therefore, variable resistors and switches are not required. {Technology for stopping the movable member at the stop position using variable resistors and switches requires the use of contact materials with excellent weather resistance and durability, which is costly. }, It is possible to inexpensively manufacture an electric drive device that can stop the damper at a desired rotation position.

(2) The link restraining member is arranged so that the movement of the link is restrained just before the damper turns to the turning position or just before turning to the turning position, and the motor is not stopped. Therefore, the motor is not overloaded, and a plurality of pivot positions of the damper can be set.

(3) Since the link restraining member is arranged so that the movement of the link is restrained just before the damper turns to the turning position or just before turning to the turning position, the damper turning is performed. It is possible to prevent the movement position from being exceeded (because the rotation speed of the motor is reduced).

[0037]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention (Claim 1,
4 to 5) will be described with reference to FIGS. A vehicle air conditioner (hereinafter, referred to as an air conditioner 1) includes a duct 2 that guides air into a vehicle compartment, a blower 3 that introduces air into the duct 2 and sends the air into the vehicle compartment, a refrigeration cycle 4, and a hot water circuit 5.
And an air conditioner control device 6 (see FIG. 2), and employs an electric damper drive device A having the configuration of the present invention.

The duct 2 has a branch duct 2 on the downstream side thereof.
a, 2b, 2c are connected, and the tips of the branch ducts 2a to 2c communicate with a defroster outlet 7, a face outlet 8, and a foot outlet 9 which are open to the inside of the vehicle.

Reference numerals 7, 8 and 9 denote a defroster outlet for blowing air toward the window glass 10 of the vehicle, a face outlet for blowing air toward the upper body of the occupant, and a foot blow for blowing air toward the feet of the occupant. It is the exit. The defroster outlet 7, the face outlet 8, and the foot outlet 9 are provided at the upstream side openings of the branch ducts 2a to 2c and selectively opened and closed by the outlet switching dampers 11 and 12.

The blower 3 is composed of a blower case 3a, a centrifugal fan 3b, and a blower motor 3c, and rotates at a rotational speed according to the amount of electricity supplied to the blower motor 3c. The blower case 3a is formed with an inside air inlet 13 for introducing air inside the vehicle (inside air) and an outside air inlet 14 for introducing air outside the vehicle (outside air). In addition, 301 is a duct, and the inside / outside air switching damper 15 is assembled.

The refrigeration cycle 4 includes a refrigerant compressor 1 driven by an engine 17 of a vehicle via an electromagnetic clutch 16.
8, a refrigerant condenser 20 that condenses and liquefies the high-temperature and high-pressure refrigerant compressed by the refrigerant compressor 18 by blowing air from the cooling fan 19, and temporarily stores the refrigerant condensed by the refrigerant condenser 20 and only the liquid refrigerant. A receiver 21 for flowing and a decompression device 22 for decompressing and expanding the liquid refrigerant guided by the receiver 21.
And a refrigerant evaporator 23 arranged in the duct 2 and evaporating the low-temperature and low-pressure refrigerant decompressed by the decompression device 22 by receiving the air blow of the blower 3 and each functional member is annularly formed by a refrigerant pipe. It is connected.

The hot water circuit 5 includes a refrigerant evaporator 2 in the duct 2.
A heater core 25 which is arranged in the leeward direction of 3 and heats the air flowing in the duct 2 by using the cooling water of the engine 17 as a heat source;
The heater core 25 is constituted by a cooling water circuit (not shown) of the engine 17 and a hot water pipe 26 that connects the heater core 25 in an annular shape.

The heater core 25 is arranged in the duct 2 so as to form a bypass path 27 through which the air passing through the refrigerant evaporator 23 bypasses the heater core 25 and flows.
The ratio between the amount of air passing through the heater core 25 and the amount of air passing through the bypass passage 27 is
It is adjusted by an air mix damper 28 arranged on the windward side of the.

The air conditioner control device 6 is provided with a microcomputer (not shown), and as shown in FIG. 2, it is based on an operation signal output from the air conditioner operation panel 29, a detection signal from each sensor described later, and the like. The following items {inside / outside air switching motor 30, outlet switching motor 70, air mix switching motor 32, motor drive circuit 33, clutch drive circuit 34} are energized and controlled.

The inside / outside air switching motor 30, the outlet switching motor 70, and the air mix switching motor 32 are equipped with a speed reducer for driving the inside / outside air switching damper 15, the outlet switching dampers 11, 12, and the air mix damper 28. It is a DC motor. The motor drive circuit 33 is a circuit that drives the blower motor 3c. The clutch drive circuit 34 is the electromagnetic clutch 16
This is a circuit for driving.

The air conditioner operation panel 29 is arranged on an instrument panel (not shown) in the vehicle compartment, and as shown in FIG. 3, is set with a temperature setting switch 35 for setting the passenger's desired indoor temperature. A set temperature display section 36 for digitally displaying the indoor temperature, an auto switch 37 for instructing automatic operation of the air conditioner 1, an off switch 38 for instructing to stop the air conditioner 1, and an inside / outside air changeover switch 39 for selecting an inside air / outside air mode. An outlet switch 40 for selecting the outlet mode, an air volume setting switch 41 for selecting the air volume level of the blower 3, and an air conditioner switch for selecting ON / OFF of the electromagnetic clutch 16 (hereinafter referred to as A / C switch 4).
2) is provided.

The above-mentioned sensors are used to measure the vehicle interior temperature (inside air temperature T
r), an inside air sensor 43 that detects the temperature, an outside air sensor 44 that detects the vehicle exterior temperature (outside air temperature Tam), a solar radiation sensor 45 that detects the amount of solar radiation (solar radiation Ts), and air immediately after passing through the refrigerant evaporator 23. A post-evaporation temperature sensor 46 that detects the temperature (post-evaporation temperature Te), a water temperature sensor 47 that detects the temperature of the engine cooling water (cooling water temperature Tw), and the like.

The operation of the air conditioner control device 6 (microcomputer) will be described with reference to the flow chart shown in FIG. Initialization processing is performed in step s1. Step s2
Then, the signal transmitted by the temperature setting switch 35 relating to the set temperature Tset is read.

At step s3, the inside air temperature Tr and the outside air temperature Ta.
m, solar radiation Ts, post-evaporation temperature Te, and cooling water temperature Tw
The sensor signals sent by the inside air sensor 43, the outside air sensor 44, the solar radiation sensor 45, the post-evaporation temperature sensor 46, and the water temperature sensor 47 are read.

In step s4, the heat quantity of air blown into the vehicle compartment (hereinafter referred to as the target blowout temperature TAO) is calculated based on the following equation.
Is calculated. TAO = Kset / Tset-Kam / Tam-Kr /
Tr−Ks · Ts + C However, Kset, Kam, Kr,
Ks and C are constants.

In steps s5, 6, and 7, the blower voltage, the suction port mode, and the blowout port mode are determined based on the calculated target outlet temperature TAO based on the characteristic chart stored in advance in the microcomputer. Note that FIG. 10 is a graph showing the relationship between the target outlet temperature TAO and the suction port mode.

At step s8, the refrigerant compressor 18 is controlled based on the state of the A / C switch 42 and the like {electromagnetic clutch 1
6 on / off control}. In step s9, the target opening degree SW of the air mix damper 28 is calculated according to the following formula so that the actual outlet temperature into the passenger compartment becomes the calculated target outlet temperature TAO. SW = [(TAO-Te) / (Tw-Te)] × 100 (%)

A control signal is output to each motor and the motor drive circuit 33 so that each target value can be obtained, and the inside / outside air switching damper 15, the outlet switching dampers 11 and 12, the air mix damper 28, and the blower motor are output. Control 3c. In step s11, it is determined whether or not a predetermined control cycle τ has elapsed, and if it has elapsed, the process returns to step s2 and the processes of steps s2 to s10 are repeated.

Next, the electric damper drive device A used in the air conditioner 1 will be described with reference to FIGS. As shown in FIGS. 5 and 7, the electric damper drive device A includes an inside / outside air switching motor 30, a link 302, an inside / outside air switching damper 15, link suppressing members 304 and 305, and an A / C E.
It is composed of a CU 306, a shunt resistor 307, a motor driver 308, and a detection circuit 309.

The inside / outside air switching motor 30 has a speed reducing mechanism and a DC motor built in a housing 300 screwed to the duct 301, and the motor shaft 303 rotates at a reduced speed (one rotation in 4 seconds). In this embodiment, as shown in FIG. 6, a DC motor having a rated current of 0.14 A and a restricted current of 0.5 A is adopted. Generally, the restraint torque (restraint current) is
It is 3 to 4 times the rated torque (rated current).

The link 302 (made of plastic) has a cylindrical shape, the base end side is connected to the motor shaft 303, and the tip end side is connected to the inside / outside air switching damper 15. Further, an extended portion 302a extending outward is formed on the base end side. The inside / outside air switching damper 15 connected to the link 302 has a plate shape, and has two positions, that is, an inside air side position where the inside air inlet 13 is opened and an outside air intake side position (the position shown in FIG. 7) where the outside air inlet 14 is opened. The position is set.

The link restraining members 304 and 305 fixed to the housing 300 are conical bodies having circular tip ends, and rubber is used in this embodiment. This link restraint member 30
Reference numerals 4 and 305 denote extended portions 3 of the link 302 when the inside / outside air switching damper 15 comes to the outside air side position and the inside air intake side position.
It is located where the back side of 02a is pressed.

The elastic force of the link suppressing members 304 and 305 is about 2. with respect to the rated torque (the rated current flows).
The size, shape, and material are set so that the torque becomes 6 times (settable in the range of 2 to 3 times).

The A / C ECU 306 has a memory 306a for storing modes (inside air mode / outside air mode), an inside / outside air changeover switch 39 for manually setting the inside / outside air mode, and a blower for manually setting the outlet mode. Operation signal from the outlet changeover switch 40 and the like, and the detection circuit 30
The position signal from 9 is input. And A / C EC
Based on these signals, the U 306 controls the inside / outside air switching motor 30 via the motor driver 308 as shown in the flowchart of FIG. 9.

The shunt resistor 307 is a cement resistor having a low resistance value (about 1 W), and in this embodiment, it is connected in series between the motor driver 308 and the power source and generates a voltage proportional to the motor current. Motor driver 308
Controls energization of the inside / outside air switching motor 30 based on the control signal sent from the A / C ECU 306 {motor shaft 303
Rotate left, rotate right, stop}.

The detection circuit 309 is composed of a comparator and monitors the terminal voltage of the shunt resistor 307. When the current consumption of the motor driver 308 (≈motor current) exceeds the position detection level (0.28 mA), a position signal ( High level).

Next, the operation of the electric damper drive system A in step s6 of FIG. 4 will be described with reference to the flowchart of FIG. In step s61, the A / C ECU3
06 is instructed to change the suction mode based on the mode (inside air mode / outside air mode) stored in the memory 306a and the contact signal of the inside / outside air changeover switch 39 and the control state {control pattern of FIG. 10}. It is determined whether or not.

If the change to the outside air mode side is instructed, the process proceeds to step s62. If the change to the inside air mode side is instructed, the process proceeds to step s63. If there is no change instruction, the rotation signal is sent to the motor driver 308. To the step s7 without sending it to.

At step s62, the A / C ECU
A motor driver 308 starts sending a drive signal to the motor driver 308 so that the motor driver 308 applies positive to the AIF terminal and negative to the AIR terminal.

At step s63, the A / C ECU
A motor driver 308 starts sending a drive signal to the motor driver 308 so that the motor driver 308 applies a minus to the AIF terminal and a plus to the AIR terminal.

In step s64, the detection circuit 309
When the position signal from is detected after the position signal non-detection period has passed {state in which the extended portion 302a of the link 302 reaches the link suppressing members 304 and 305; YES}, the process proceeds to step s65, and other than this. In the case {a state in which the extended portion 302a of the link 302 has not reached the link restraining members 304 and 305; NO}, the process waits.

In step s65, it is considered that the mode change has been completed, the inside air mode / outside air mode is changed to a new mode, and the new mode is stored in the memory 306a {RFmemo ← RFnew}.

At step s66, the A / C ECU
306 is a motor driver 308 so that the motor driver 308 stops energizing the inside / outside air switching motor 30.
To stop the drive signal being sent to the vehicle {stop the inside / outside air switching motor 30; stop the inside / outside air switching damper 15}, step s
Go to 7.

Next, the advantages of the electric damper driving device A will be described. [A] When the change of the inlet mode is instructed {step s61 in FIG. 9}, the outlet switching motor 30 is switched to a mode opposite to a certain mode (inside air mode / outside air mode) stored in the memory 306a. Instruct to energize {Step s in FIG. 9
62, s63}, and the position signal from the detection circuit 309 {transmitted by an increase in current consumption of the motor driver 308}
However, this energization instruction is continued until the position signal is detected after the non-detection period, and the inside / outside air switching damper 15 is switched to the predetermined position side.

Therefore, the variable resistor (see FIG. 14) and the position detecting switch, which have been conventionally required, are unnecessary. {The contact resistance material having excellent weather resistance and durability is used in the technique using the variable resistor and the switch. Therefore, the manufacturing cost is low.

[A] The load applied to the outlet switching motor 30 is increased when the inside / outside air switching damper 15 is rotated to a predetermined position. {The extended portion 302a of the link 302 is the link suppressing member 3
04, 305 is suppressed. Because of this,
The motor will not be overloaded. {Since the motor is not stopped by the stopper}. Also, the inside / outside air switching damper 1
5 can be prevented from exceeding the turning position (because the rotation speed of the motor decreases at the time of turning to a predetermined position).

Next, as a second embodiment (corresponding to claims 1, 4, and 5), the configuration of the present invention is applied to the outlet control.
The electric damper drive device B is shown in FIGS.
3 will be described. As shown in FIGS. 11 and 12, the electric damper drive device B includes an outlet switching motor 70, a link 71, a damper 72, and link restraining members 711 and 7.
12, 713, 714, 715 and A / C ECU 73
The shunt resistor 74, the motor driver 75, and the detection circuit 76 are used for an air conditioner (not shown) according to the air conditioner 1 of FIG.

Similar to the first embodiment, the outlet switching motor 70 has a speed reduction mechanism and a DC motor built in a housing 702 screwed to a duct 701, and a motor shaft 703.
Decelerates and rotates (1 revolution in 4 seconds). Also in this embodiment, similarly to the first embodiment, the rated current is 0.14 A and the restricted current is 0.5.
The DC motor of A is adopted.

The link 71 (plastic) has a cylindrical shape, the base end side is connected to the motor shaft 703, and the tip end side is connected to the damper 72. In addition, the extending portion 71 that extends outward
a {rubber is attached} is formed on the base end side. The damper 72 connected to the link 71 has a plate shape and has a face position, a B / L position, a foot position, and an F / D position.
Five positions, a position and a Def position, are set.

The link suppressing members 711 to 715 (made of plastic) fixed to the housing 300 are conical bodies having a circular tip. The link suppressing members 711 to 715 are
When the damper 72 reaches the Face position, the B / L position, the Foot position, the F / D position, and the Def position, the damper 72 is positioned at a position where the extension is performed from the back side of the extending portion 71a of the link 71, respectively.

The link suppressing members 711 to 715 are approximately 2.6 times larger than the rated torque (the rated current flows) {2.
The size and shape are set so that the torque can be set in the range of 2 to 3 times}.

The A / C ECU 73 uses the mode {Face
Memory 731 for storing modes, B / L mode, Foot mode, F / D mode, and Def mode}
In addition to the above, an operation signal from the outlet switch 40 for selecting each mode and a position signal from the detection circuit 76 are input. Then, the A / C ECU 73, based on these signals, as shown in the flowchart of FIG.
Control 0.

The shunt resistor 307 is a cement resistor having a low resistance value (about 1 W), is connected in series between the motor driver 75 and the power source, and generates a voltage proportional to the motor current, as in the first embodiment. . Motor driver 75
Controls the energization of the outlet switching motor 70 {motor shaft 703 counterclockwise rotation, clockwise rotation, stop} based on the control signal sent from the A / C ECU 73, as in the first embodiment.

As in the first embodiment, the detection circuit 76 including a comparator monitors the terminal voltage of the shunt resistor 74, and the current consumption of the motor driver 75 (≈motor current).
When exceeds the position detection level (0.28 mA), a position signal (high level) is sent to the A / C ECU 73.

Next, the operation of the electric damper drive unit B in step s7 of FIG. 4 will be described based on the flowchart of FIG. In step s71, the A / C ECU
Reference numeral 73 denotes a mode (any one of Face mode, B / L mode, Foot mode, F / D mode, and Def mode) currently stored in the memory 731, and an air conditioner operation panel 29.
It is determined whether or not the mode change is instructed based on the operation signal {sending by manual operation} from the outlet switch 40.

When the change of the mode is instructed (YES)
Proceeds to step s72 and is not instructed (NO)
Proceeds to step s8. In step s72, A /
The ECU 73 determines the rotation direction of the motor based on the mode stored in the memory 731 and the operation signal from the outlet switch 40, and proceeds to step s73.

At step s73, the A / C ECU
73 starts sending a rotation signal to the motor driver 75 so that the motor rotates in the determined rotation direction. For example, when a mode change is instructed from the Foot mode to the Face mode, a drive signal is sent to the motor driver 75 so that a plus is applied to the AOF terminal and a minus is applied to the AOD terminal.

In step s74, if the position signal from the detection circuit 76 is detected after the position signal non-detection period has passed, the process proceeds to step s75, otherwise the process waits. In step s75, based on the number of times the position signal from the detection circuit 76 is detected after the position signal undetected period, the A / C ECU 73 causes the damper 72 to
Is determined to have rotated to the target position, and if it is determined to have rotated to the target position (YES), the process proceeds to step s76, and if it is determined not to rotate to the target position (N
O) returns to step s74.

At step s76, the A / C ECU 73
Considers that the mode change is completed, changes the mode to a new mode, and stores the new mode in the memory 731 {MODEmemo ← MODEne
w}.

At step s77, the A / C ECU
In 73, the motor driver 75 is the outlet switching motor 70.
In order to stop the energization of the motor driver 75, the drive signal sent to the motor driver 75 is stopped, and the process proceeds to step s8.

Next, the advantages of the electric damper drive device B will be described. [C] Mode change is instructed {step s in FIG.
If YES in 71}, the motor driving direction is calculated to drive the motor {steps s72, 73}, and after the position signal undetected period, the position signal from the detection circuit 76 {current consumption of the motor driver 75 However, if the damper 72 is rotated to the target position, the mode is changed to a new mode and the new mode is stored in the memory 731. Then, the outlet switching motor 70 is stopped.

Therefore, the variable resistor (see FIG. 14) and the position detecting switch, which have been conventionally required, are not necessary. {In the technique using the variable resistor and the switch, the contact material excellent in weather resistance and durability is used. Therefore, the manufacturing cost can be reduced.

[D] The load applied to the outlet switching motor 70 is increased when the damper 72 is rotated to each mode position. For this reason, the motor is not overloaded. {Since the motor is not stopped by the stopper}
At the same time, a plurality of rotational positions of the damper 72 can be set.

The present invention includes the following embodiments in addition to the above embodiments. a. The load member can change the load amount at each displacement point by changing the installation location (the load increases outward from the motor shaft), height, length, material, or shape. In this case, the displacement detecting means is provided in the microcomputer and detects to which displacement point the movable member is displaced based on the motor current (corresponding to claim 2).

B. Assembling the load member in the reduction mechanism of the motor {for example, assembling the load member so that the load applied to the motor varies between the housing and the gear},
When the movable member moves between the displacement points, it is possible to cause a plurality of times of torque fluctuations {corresponding to claim 3}.

C. The motor current may be detected by a method (for example, a Hall element) other than the method of detecting the motor current based on the terminal voltage of the resistor. d. In the first, second, third, and fourth aspects, the movable member that is driven by being coupled to the motor shaft that rotates at a reduced speed may perform a motion other than a circular motion (for example, a linear motion).

D. When the displacement detecting means detects whether or not the movable member is displaced to a predetermined displacement point (claims 1, 2, 3).
In such a case, the load member may be arranged so that the load applied to the motor or the like increases or decreases when the movable member is stopped at the predetermined displacement point. In the case of stopping the damper at a predetermined rotation position}, a configuration for increasing the load is suitable.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a vehicle air conditioner that employs an electric damper drive device according to a first embodiment of the present invention.

FIG. 2 is a block diagram of an air conditioner control device included in the vehicle air conditioner.

FIG. 3 is an explanatory diagram of an operation panel related to the vehicle air conditioner.

FIG. 4 is a flowchart showing an operation of the air conditioner control device.

FIG. 5 is a block diagram of an electric damper drive device according to a first embodiment of the present invention.

FIG. 6 is a graph showing torque-motor current characteristics of the motor adopted in the electric damper drive device according to the first example of the present invention.

FIG. 7 is a lateral view (a) and a front view (b) of the electric damper drive device according to the first embodiment of the present invention.

FIG. 8 is a graph showing a damper opening-motor current characteristic of the electric damper driving device according to the first embodiment of the present invention.

FIG. 9 is a flowchart showing the operation of the electric damper drive system according to the first embodiment of the present invention.

FIG. 10 is a graph showing TAO-inlet mode characteristics of the vehicle air conditioner according to the first embodiment of the present invention.

FIG. 11 is a block diagram of an electric damper drive device according to a second embodiment of the present invention.

FIG. 12 is a lateral view (a) and a front view (b) of an electric damper drive device according to a second embodiment of the present invention.

FIG. 13 is a flowchart showing the operation of the electric damper drive system according to the second embodiment of the present invention.

FIG. 14 is a block diagram of a conventional electric damper drive device.

[Explanation of symbols]

15 inside / outside air switching damper (movable member, damper) 30 inside / outside air switching motor (motor) 70 blowout port switching motor (motor) 71 link 76 detection circuit (motor current detection means) 302 link 303 motor shaft 304, 305 link suppression member ( Load member, rotation suppressing member) 306 A / C ECU (displacement detecting means, motor energization controlling means) 307 Shunt resistance (motor current detecting means) 309 Detection circuit (motor current detecting means) 711 to 715 Link suppressing member (load member, Rotation suppression member) A, B Electric damper drive device

Claims (5)

[Claims] 1. A motor having a reduction mechanism and a motor shaft that is rotated at a reduced speed to be driven while being connected,
A movable member having one or more kinds of displacement points set, a load member arranged such that the load applied to the motor increases or decreases when the movable member is displaced to the displacement point, and a load member that flows to the motor A motor current detection means for detecting a current, displacement information of the movable member before energizing the motor this time, and whether or not the movable member is displaced to a predetermined displacement point based on a change in the detected motor current. An electric drive device having displacement detecting means for detecting. 2. A motor having a deceleration mechanism and a motor shaft for decelerating rotation, which is connected to and driven by a motor shaft,
A movable member in which a plurality of displacement points are set, a plurality of load members arranged so that when the movable member is displaced to the displacement point, a load determined for each displacement point is applied to the motor, and a current flowing through the motor An electric drive device having a motor current detecting means for detecting the above, and a displacement detecting means for detecting at which displacement point the movable member is displaced based on the magnitude of the detected motor current. 3. A motor having a reduction mechanism and a motor shaft that is rotated by deceleration and is driven,
A movable member to which one or more kinds of displacement points are set, and a load assembled to the reduction mechanism such that the movable member causes a plurality of times of torque fluctuations while the movable member is displaced from one displacement point to the next displacement point. A member, a motor current detection unit that detects a current flowing through the motor, displacement information of the movable member before the motor is energized this time, and a predetermined displacement point of the movable member based on the number of times the motor current fluctuates. An electric drive device having a displacement detection means for detecting whether or not the displacement has occurred. 4. A motor having a deceleration mechanism and a motor shaft for decelerating rotation, which is connected to and driven by a motor shaft,
A movable member in which one or more stop positions are set, and a rotation suppressing member arranged so that the rotational force of the motor is suppressed when the movable member is at or immediately before being located at the stop position. A motor current detecting means for detecting a current flowing through the motor; targeting the movable member based on stop position information of the movable member before the motor is energized this time; and an increase change in the detected motor current. An electric drive device having a motor energization control means for stopping at a stop position. 5. A motor having a speed reduction mechanism, a link that is directly connected to a motor shaft that rotates at a reduced speed, and rotates, a damper that is connected to the link and that has a plurality of rotational positions set, and the damper. A plurality of link restraint members arranged on the motor side so as to restrain the movement of the link by coming into contact with the link when or immediately before reaching the turning position, and a motor for detecting a current flowing through the motor. Current detection means, and motor energization control means for stopping the damper at a target rotational position based on the rotational position information of the damper before the motor is energized this time and the number of times the detected motor current is increased. An electric drive device having.