KR20110003707A - Method for controlling for door actuator of car air conditioner - Google Patents

Abstract

PURPOSE: A method for controlling a door actuator of an air conditioner for a vehicle is provided to protect a door and an actuator by correcting the position of the door even if a vehicle is left alone for a long time. CONSTITUTION: A method for controlling a door actuator of an air conditioner for a vehicle is as follows. It is determined whether a motor is rotated when a door is rotated(S10). When it is determined that the motor is restrained, a target voltage value for moving the door in an opposite direction of the restrained direction is calculated by applying a correction voltage value to a detected feedback voltage value(S40). The calculated target voltage value is supplied to the motor(S50).

Description

TECHNICAL FOR CONTROLLING FOR DOOR ACTUATOR OF CAR AIR CONDITIONER

The present invention relates to a method for controlling a door actuator of a vehicle air conditioner. More specifically, when it is determined that the door is in a restrained state, the door is controlled to be out of the restrained position, so that even if the vehicle is left for a long time in a stopped state, the door The present invention relates to a method for controlling a door actuator of a vehicle air conditioner so as to prevent deformation and damage of the reduction gear or output gear of the actuator.

In general, the vehicle air conditioner is a vehicle interior installed for the purpose of securing the driver's front and rear view by removing the frost, which is caught in the windshield during the rainy season or winter, or by cooling or heating the interior of the car during the summer or winter. As such, the air conditioner is usually equipped with a heating device and a cooling device at the same time to selectively introduce the outside air or bet, and then heat or cool the air and blow it into the interior of the vehicle to cool, heat or ventilate the interior of the vehicle. .

The air conditioner includes a three piece type in which the three units are independently provided, and an evaporator unit and a heater core unit are coordinated according to independent structures of the blower unit, the evaporator unit, and the heater core unit. The semi-center type is built in the case and the blower unit is provided as a separate unit, and the center mounting type (Center Mounting Type) in which all three units are built in the air conditioning case.

FIG. 1 shows the semi-center type air conditioner, wherein the air conditioner 1 has an air inlet 11 formed at the inlet side and opened by mode doors 16, 17, and 18 at the outlet side, respectively. An air conditioning case 10 in which the defrost vent 12a, the face vent 12b, and the floor vents 12c and 12d are adjusted; A blower (not shown) connected to the air inlet 11 of the air conditioning case 10 to blow the inside or outside air; An evaporator (2) and a heater core (3) embedded in the air conditioning case (10); The opening degree of the cold air flow path P1 which is installed between the evaporator 2 and the heater core 3 and bypasses the heater core 3 and the hot air flow path P2 passing through the heater core 3 is shown. It comprises a temperature control door 15 to adjust.

In addition, the blower is provided with an intake door (not shown) for selectively opening and closing the inside / outside air inlet (not shown) to allow the inside or outside air to selectively enter.

In addition, the mode door corresponding to the member number 16 among the mode doors 16, 17, and 18 is a defrost door for adjusting the opening degree of the defrost vent 12a, and the mode door corresponding to the member number 17 is a face vent ( 12b) is a face door for adjusting the opening degree, the mode door corresponding to the member number 18 is a floor door for adjusting the opening degree of the floor vent (12c, 12d).

Further, the floor vents 12c and 12d are separated into a front seat vent 12c and a rear seat vent 12d.

The temperature control door 15, the mode doors (16, 17, 18) and the intake door (not shown) are connected to the door actuator motor installed on the outer side of the air conditioning case 10 to rotate. The opening degree of the cold and hot air flow passages P1 and P2 is controlled by the temperature control door 15, and the opening degree of each of the vents 12a to 12d is adjusted by the mode doors 16, 17, and 18. By the intake door, internal / external air is selectively introduced into the air conditioning case 10.

On the other hand, the door actuator, on the other hand, the upper and lower cover coupled to each other, the motor mounted on the inside of the upper / lower cover, an output gear having an output shaft that receives the power of the motor through the reduction gear, and the output gear It is composed of a feedback sensor modularized to recognize the feedback output value according to the rotation to control the feedback of the motor.

By the way, the temperature control door 15, the mode doors (16, 17, 18) and the intake door (not shown) by the motor, the cold / hot air passage (P1) (P2), vents 12a-12d ), When the lock is activated to the target position to completely close the inside and outside air inlet, and the lock state can no longer be rotated, the door and the motor are reversed, which may eventually cause the door to deform or decelerate the door actuator. This may cause damage to the gears or output gears.

In order to solve this problem, after approximately tens of seconds (e.g., 20 seconds) have elapsed when the door is restrained, the current supplied to the motor of the door actuator is cut off to stop the operation of the door actuator.

However, if the vehicle is left for a long time while the starting is stopped, there is a risk that the deformation of the door and the reduction gear or the output gear may be excessive because the restrained state in which the door is in close contact with the inner wall surface of the air conditioning case is continuously maintained.

Accordingly, the present invention was created to solve the above problems, and if it is determined that the door is in a restrained state, the door is deformed so that the door may be deformed even if the vehicle is left for a long time in the stopped state. And to provide a door actuator control method of the vehicle air conditioner to protect the actuator so as to prevent deformation or damage of the reduction gear or output gear of the actuator.

According to an aspect of the present invention, there is provided a method of controlling a door actuator of a vehicle air conditioner in which the two voltage values are matched with a current feedback voltage value detected according to a rotation speed and a set target voltage value. A motor restraint determination step of determining whether the door is stopped and no longer rotated by the object in the rotational movement state; As a result of the determination of the motor restraint determination step, if it is determined that the motor is in the restrained state, the correction voltage value at which the door may be stopped at a position deviated from the object is provided to the currently detected feedback voltage value to restrain the door. A target voltage value calculating step of calculating a target voltage value to be moved in a direction opposite to the direction; And a target voltage value supplying step of supplying the target voltage value calculated in the target voltage value calculating step to the motor.

According to the door actuator control method of the vehicle air conditioner according to the present invention, if it is determined that the door is in a restrained state, by adjusting the control so that the door is out of the restrained position, even if the vehicle is left for a long time in the stopped state, the door deformation and actuator The deformation of the reduction gear or output gear can be protected to prevent damage.

Hereinafter, a preferred embodiment of a door actuator control method of a vehicle air conditioner according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a flowchart illustrating a method of controlling a door actuator of a vehicle air conditioner according to the present invention, and FIG. 3 is an example to explain the motor control method of the present invention, and an operation relationship between an intake door that opens and closes an inside / outdoor air inlet of a blower. 4 is an exploded perspective view showing the configuration of a door actuator applied to the present invention.

According to the present invention, a door actuator of a vehicle air conditioner for rotationally controlling the door 23 to match the two voltage values by comparing the current feedback voltage value detected from the feedback sensor 34 with a set target voltage value according to the rotation speed. It relates to the control method of (40).

 That is, in the present invention, if it is determined that the door 23 is in the restrained state, the control is performed so as to be out of the restrained position, so that even if the vehicle is left for a long time in the state where the start is stopped, the deformation of the door 23 and the actuator 40 Deformation of the reduction gear 36 or the output gear 35 is to protect to prevent damage.

Here, as shown in Fig. 3 (a) (b) to the door 23 applied to the present invention, an intake door for opening and closing the inside / outside air inlets 22, 21 of the blower is taken as an example, but in the prior art It turns out that the control method of the present invention can be applied to not only the mode door but also the temperature control door.

The present invention is controlled by the controller 40 shown in FIG. 4, and as shown in FIG. 3 (a), both ends 23a and 23b of the door 23 in the state in which the door 23 is rotating. ) Is stopped by the inner wall surfaces 21a and 21b of the outside air inlet 21, which is the object, and performs a motor restraint determination step of determining whether the motor is no longer rotated (S10).

Here, the method for determining whether the motor 33 is restrained is when the current feedback voltage value detected by the feedback sensor 34 is equal to or less than a predetermined value, and this feedback voltage value is the output gear 35 of the motor 33. ) Is too low to rotate.

Subsequently, after performing the step S10, when it is determined that the motor 33 is in a restrained state, a correction voltage at which the door 23 may be stopped at a position deviated from the object to the currently detected feedback voltage value is obtained. By assigning a value, a target voltage value calculating step of calculating a target voltage value for moving the door 23 in a direction opposite to the restraint direction is performed.

According to an exemplary embodiment of the present invention, when it is determined that the motor 33 is in a restrained state, the feedback voltage value currently detected is read (S20), and the feedback voltage value is converted from an analog value to a digital value. After performing the voltage value converting step (S30) to convert to, the correction voltage value is given to the digital value converted in the voltage group converting step of step (S30). At this time, the correction voltage value is a digitized value.

Here, the voltage value supplied to the motor 33 is usually 0V to 5V, and the voltage value is converted into a binary value so as to be recognized by the controller 40 and converted into a digital value from 0 to 255. That is, the digital value subdivided from 0 to 255 may be rotated by finely dividing the rotation angle of the door 23.

And, the position of the number '0' which is changed into a digital value is one side inner wall surface 21b of the outside air inlet 21 as shown in FIG. 3 (a), and the position of the number '255' is shown in FIG. 3 (a), As the other inner side wall surface 21a of the outside air inlet 21, the section from one side side wall surface 21b of the outside air inlet 21 to the other side side wall surface 21a is divided into digital values so as to be 0 to 255.

Therefore, as shown in FIG. 3A, when the motor 33 is constrained by the door 23 with the outside air inlet 21 closed, the conversion is performed in the voltage conversion step of step S30. The target voltage value is calculated by giving a digitized correction voltage value of about +3 to the digital value.

On the other hand, as shown in Fig. 3 (b), when the motor 33 is constrained in the state in which the bet inlet 22 is closed by the door 23, it is converted in the voltage conversion step of step S30 The target voltage value is calculated by applying a digital correction voltage value of about -3 to the digital value. Here, although the correction voltage value applied to the digital value converted in the voltage group converting step of step S30 is taken as an example, +3 and -3 are exemplified, but the present invention is not limited thereto.

Thereafter, a target voltage value supplying step of supplying the target voltage value calculated in the target voltage value calculating step S40 to the motor 33 is performed (S50).

In this case, the correction voltage value is such that both ends 23a and 23b of the door 23 are stopped from the inner wall surfaces 21a and 21b of the outside air inlet 21 when the motor 33 is in a restrained state. to be. In other words, both ends 23a of the door 23 are prevented from leaking air when both ends 23a and 23b of the door 23 come into contact with the inner wall surfaces 21a and 21b of the outside air inlet 21. (23b) Seal members 24 and 25 are attached to both sides of the door 23. The door 23 is moved in a direction in which the compression amount of the seal members 24 and 25 is reduced while maintaining a state where air leakage does not occur. The voltage value to be driven.

Here, the direction in which the compression amount of the seal members 24 and 25 is reduced is the arrow 'F' direction in FIG. 3 (a), and the arrow 'G' direction in FIG. 3 (b).

Accordingly, when the step S50 is performed, both ends 23a and 23b of the door 23 are formed on the inner wall surfaces 21a and 21b and 21a and 22a formed at the internal / external air inlets 21 and 22. It is released from the supported state, and the compression amount of the seal members 24 and 25 at this time is in a state of decreasing by a predetermined amount from the maximum value. Therefore, even if the vehicle is left for a long time in the state where the start is stopped, the deformation of the door 23 and the reduction gear 36 or the output gear 35 of the actuator 40 can be protected to be prevented.

1 is a cross-sectional view showing the internal configuration of a vehicle air conditioner according to the prior art.

Figure 2 is a flow chart showing a door actuator control method of the vehicle air conditioner according to the present invention.

Figure 3 is an example for explaining the motor control method of the present invention, a view showing the operation relationship of the intake door for opening and closing the inlet / outside air inlet of the blower.

4 is an exploded perspective view showing the configuration of a door actuator applied to the present invention.

<Description of the symbols for the main parts of the drawings>

23: door

33: motor

34: feedback sensor

35: output gear

36: reduction gear

40: controller

Claims (3)

In the door actuator control method of the vehicle air conditioner to compare the two voltage values by comparing the current feedback voltage value and the set target voltage value detected according to the rotation speed, A motor restraint determination step of determining whether the door is stopped by an object in the state of rotating movement and no longer rotates; As a result of the determination of the motor restraint determination step, if it is determined that the motor is in the restrained state, the correction voltage value at which the door may be stopped at a position deviated from the object is provided to the currently detected feedback voltage value to restrain the door. A target voltage value calculating step of calculating a target voltage value to be moved in a direction opposite to the direction; And a target voltage value supplying step of supplying the target voltage value calculated in the target voltage value calculating step to the motor. The method of claim 1, further comprising: a voltage value converting step of converting the detected feedback voltage value from an analog value to a digital value when the motor is determined to be in a restrained state. And the correction voltage value is a digitized value and is applied to the digital value converted in the voltage value converting step. The method according to claim 1 or 2, The door further comprises a seal member to prevent the leakage of air when the contact with the object, And the correction voltage value is a voltage value for driving the door in a direction in which the compression amount of the seal member is reduced while maintaining a state in which air is not leaked between the door and the object.

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