JPS6259115A - Actuator controller for air conditioner - Google Patents

Abstract

PURPOSE:To improve controllability by utilizing the shift correction quantity related to the max. and min. of the shift obtained in simulation drive, when an air conditioning function member is shifted by an actuator whose shift is detected by a shift sensor and feedback-operated. CONSTITUTION:A shift sensor B for generating a shift signal proportional to the shift of an actuator A for mechanically shifting an air conditioning function member is provided. Further, a simulation driving means C for simulation-driving the actuator A within a movable range in correspondence with the instruction automatically generated by the turning-ON of the main switch in the apparatus is provided. The shift correction quantity related to the max. and min. values of he shift signals detected by the shift sensor B in the simulation drive period is determined by a correction quantity determining means D, and memorized into a memory means E. Then, the correction signal memorized into the memory means E in the ordinary drive of the actuator A by an ordinary drive means F is read, and used for the correction of shift value.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides an actuator control device for an air conditioner that displaces an air conditioning functional member using an actuator whose displacement is detected by a displacement sensor and fed back. Regarding.

[Function and its problems]

In conventional control devices using this type of actuator, the operating range of the actuator is determined by design, and the control device is designed from the beginning to move the actuator within that range. Therefore, the damper as an air conditioning function member and the flow rate adjustment valve could not be operated to their maximum positions due to looseness in their attachment parts and link mechanisms, resulting in wind leakage from the damper and fluid leakage from the adjustment valve. Conversely, if the centers of the actuating angles of the actuator and the damper etc. deviate from each other, the actuator attempts to operate beyond the maximum position and becomes locked.

[Means for solving problems]

Therefore, as shown in FIG. 1, the present invention includes an actuator that mechanically displaces an air conditioning functional member, a displacement sensor that generates a displacement signal proportional to the displacement of this actuator, and a correction signal that represents the displacement correction amount. storage means, means for simulating driving the actuator within a movable range in response to a command, and storing a value related to a displacement correction amount related to a maximum value and a minimum value of the displacement signal during a simulative driving period of the actuator. A structural feature is that the correction signal stored in the storage means is used for displacement correction during normal driving of the actuator.

Here, the simulated drive command is either automatically generated in conjunction with turning on the main switch of the device or the power supply system that includes the device, or manually generated by turning on a specially prepared simulated drive command switch. You can do it like this.

In the above case where the command is automatically generated, the simulated drive may be masked once the correction amount is given to the storage means in order to prevent the simulated drive from being performed unnecessarily frequently.

[Function and effect of the invention]

According to the present invention, the displacement correction amounts related to the maximum and minimum displacements are prepared prior to normal driving, so the above-mentioned problem is solved.

〔Example〕

FIG. 2 shows a temperature control device for an automobile air conditioner to which the present invention is applied. A control device 2 including a microcomputer receives signals from an input element 1 such as a temperature sensor and a switch, and operates an actuator 3 that displaces various air conditioning function members under electrical control according to a preset program. let Among the actuators, a DC reversible motor 4 for displacing the temperature control member is shown separately. Further, an amount of electricity proportional to the amount of displacement of the motor 4 is detected by the displacement sensor 5 and input to the control device 2 .

In the control device 2, the microcomputer has a memory backed up in terms of power supply by suitable means, such as by direct connection to the vehicle battery. Further, the microcomputer is provided with a control program formed as shown in FIGS. 3 and 4, and executes this control program during the period when the main switch of the air conditioner is turned on.

By turning on the main switch, the initial cent program 100 is executed, and in step 200, the backup flag stored in the bank amplifier memory is read,
That flag is set in the check result of step 201, so to speak, in the normal initial cent step 2.
03 is executed, but if it has not been set, an initial setting step 202 including setting the control target set temperature to an initial value (for example, 25° C.) is executed. Also the fourth
A subroutine 101, detailed in the figure, is then executed. Similar to step 202, this subroutine is executed when the main switch is turned on initially after the connection of the on-board battery, and when no backup data is stored in the bank amplifier memory, in order to store the bank up data. Ru.

The relationship between the actual displacement O~100% of the temperature regulating member or the coupling mechanism between the motor 4 and this member and the magnitude vP of the displacement signal of the displacement sensor 5 is shown in FIG. When the motor 4 is displaced to the maximum heating side, the temperature adjustment member is locked. At this time, the amount of displacement of the temperature control member is 100%, but the actual displacement of the displacement signal V from the displacement sensor attached to the output shaft of the motor 4 reaches 100% due to play and backlash in the coupling mechanism. On the other hand, when the motor 4 is maximally displaced to the cooling side,
The displacement sensor 5 indicates a value VFC that exceeds the actual position VPC'. The amount of deviation of the displacement sensor is represented by K□, ■, and is programmed in advance as a constant value. The value of the displacement signal V when the temperature control member is locked ■□,
■2. Even if the value differs depending on the air conditioner or as the usage period progresses, the correction amount - □* KK
t is treated as a constant value.

In the subroutine of FIG. 4, in step 106, a signal is output for a certain period of time to simulate drive the motor toward the cooling side. This period of time is usually set to be long enough for the temperature regulating member to move from the maximum heating position to the maximum cooling position. Then, the value of this elapsed time, the displacement signal V in step 107, is stored in the backup memory as the value VPC.

Next, a simulated drive step IQ8 is executed so as to produce the maximum displacement of the temperature adjustment member on the heating side, and in step 109, the displacement signal V is stored as a value V□. Subsequently, in step 110, a back amplifier flag is set.

Normal drive control will be explained with reference to FIG.

In step 102, the displacement amount SW (%) of the temperature adjustment member necessary for temperature control is calculated.Next, in step 103, the actual displacement amount SP (%) of the temperature adjustment member is calculated. This calculation involves the values V,c for the correction stored in the backup memory.

VP14 is used and a constant deviation iV from this. +VK2
After the effective movable range VFC' + VPM' is calculated, the actual displacement amount SP is calculated proportionally.

Then, in step 104, the motor 4 is driven based on the deviation 5w-5p. Step 105 is a program for controlling the air conditioner using another actuator.

Note that a manual switch may be provided and the simulated drive subroutine may be executed by turning on the manual switch.

[Brief explanation of drawings]

FIG. 1 is a block diagram for explaining the outline of the configuration of the present invention,
FIG. 2 is an electrical configuration diagram showing an embodiment of the present invention, FIGS. 3 and 4 are flowcharts of a control program showing an overview of the internal operation of the control device shown in FIG. 2, and FIG. FIG. 3 is an explanatory diagram of the operation of the illustrated device. 2... Control device, 4... DC reversible motor (actuator), 5... Displacement sensor. Representative Patent Attorney Takashi Okabe JlJ Zukyu Imperial Throne Diagram 5

Claims (1)

[Scope of Claims] An actuator that mechanically displaces an air conditioning functional member, a displacement sensor that generates a displacement signal proportional to the displacement of the actuator, a storage means that stores a correction signal representing a displacement correction amount, and in response to a command. Means for driving the actuator in a simulated manner within a movable range; and means for storing in the storage means a value related to a displacement correction amount related to a maximum value and a minimum value of the displacement signal during a simulated drive period of the actuator. . An actuator control device for an air conditioner, wherein a correction signal stored in the storage means is used for displacement correction during normal driving of the actuator.