JPH1163630A - Controller for air conditioning - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller for air conditioning wherein the effect on a temperature regulating operation by an operation of calibration is reduced. SOLUTION: CPU 11 outputs a drive signal for opening or closing a chilled water valve 7 or a hot water valve 8 to a chilled water valve driving part 22a or a hot water valve driving part 22b from a digital output part 10 and makes the chilled water driving part 22a or the hot water driving part 22b open or close the chilled water valve 7 or the hot water valve 8 respectively. Herein the CPU 11 executes an operation of calibration for making the present valve travel (logical value of valve travel) of each valve 7 or 8 obtained by computation be in accord with the actual valve travel thereof only when a target value of the valve travel of each valve 7 or 8 obtained by computation is 0 or 100%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the temperature of air by adjusting the opening of a cold water valve or a hot water valve for supplying cold or hot water to a heat exchange means for exchanging heat between cold or hot water and air. The present invention relates to an air-conditioning control device for controlling air conditioning.

[0002]

2. Description of the Related Art Conventionally, a motor that receives a continuous proportional control signal, automatically converts the proportional control signal into a valve opening, and drives a valve while adjusting a rotation angle according to the valve opening. There has been an air-conditioning control device that controls the valve opening degree of a valve using a unit. Further, a valve opening contact in which the valve driving motor rotates in a direction to open the valve when on, and a valve closing contact in which the valve driving motor rotates in the direction to close the valve when on, are provided. A so-called 3 that outputs a signal to close any of the contacts or does not output to either of them
When performing position control, the valve drive motor is provided with a resistor whose resistance value changes in proportion to the rotation angle, and the control device reads the resistance value of this resistor, converts it into a valve opening, and converts the current valve In some cases, the valve was operated while feeding back the opening.

[0003] Here, when a very high precision is not required for the control of the valve opening, it is necessary for the valve driving motor to drive the valve from the fully closed state to the fully open state (from the fully open state to the fully closed state). The time (so-called valve travel time) is set in advance, the on-time of the valve open contact and the valve close contact are summed, and the current valve opening (valve opening logic) is calculated from the total time and the valve travel time. Value) by calculation to control the valve opening. At this time, in order to prevent the error between the logical value of the valve opening and the actual valve opening from expanding, the valve closing contact is closed for a certain time to bring the valve into the fully closed state, and the logical value of the valve opening and the actual valve opening are Periodically perform full-close calibration to make both the valve opening and the valve opening equal to 0%, or close the valve opening contact for a certain period of time to make the valve fully open, and set the theoretical value of the valve opening to the actual valve opening. The full open calibration is performed periodically to make both the values 100% and 100%, thereby correcting the logical value of the valve opening.

FIG. 1 is a schematic diagram showing the configuration of this air conditioning control apparatus.
0 is shown. 7 is a chilled water valve for supplying chilled water to a heat exchange means (not shown) for exchanging heat between chilled water and air, and 9 is a temperature for converting a detection signal of the temperature detector 6 into a temperature of a control object (air). Detecting means, 11 is a CPU serving as a central processing unit, 12
Is a data memory for storing a control target temperature and a parameter for control calculation, 21a is a valve opening contact for rotating the valve driving motor 7a in a direction to open the chilled water valve 7 when turned on, and 10a is a CPU 1
A valve-opening contact output means for generating a drive signal for turning on the valve-opening contact 21a in accordance with a signal input from 1; a valve closing contact 21b in which a valve driving motor 7a rotates in a direction to close the chilled water valve 7 when on; Reference numeral 10b denotes valve closing contact output means for generating a drive signal for turning on the valve closing contact 21b in accordance with a signal input from the CPU 11. Note that reference numeral 20 in FIG. 10 denotes a power supply for the valve driving motor 7a, and the chilled water valve driving unit 22a includes the valve driving motor 7a, the power supply 20, the valve opening contact 21a, and the valve closing contact 21b. .

[0005] The CPU 11 determines the temperature of the air input from the temperature detecting means 9 and the control target temperature and control calculation parameters stored in the data memory 12 in advance.
A control operation (generally, a digital PID operation) is executed to determine a valve opening target value of the chilled water valve 7. At this time, CP
U11 sums the on-time of the valve opening contact 21a and the valve closing contact 21b, divides this total time by the valve travel time,
The logical value of the valve opening is obtained by calculation. And the CPU 11
Is obtained from the difference between the valve opening logical value and the valve opening target value.
1a or a drive time for turning on the valve closing contact 21b is obtained, and a drive signal is generated from the valve opening contact output means 10a or the valve closing contact output means 10b during this driving time, and the valve opening contact 2
1a or the valve closing contact 21b is turned on, and the valve driving motor 7 is turned on.
is driven to adjust the valve opening of the chilled water valve 7.

[0006] Since this air conditioner control device does not include means for detecting the valve opening of the chilled water valve 7, the valve opening of the chilled water valve 7 is unknown at the start of the temperature adjustment operation. Therefore, at the start of the temperature adjustment operation, the CPU takes longer than the valve travel time.
Reference numeral 11 outputs a drive signal from, for example, the valve closing contact output means 10b to turn on the valve closing contact 21b. At this time, since the valve drive motor 7a is driven in the direction to close the chilled water valve 7 for a longer time than the valve travel time, no matter what the valve opening degree of the chilled water valve 7 is at the start of the temperature adjustment operation, The valve opening of the chilled water valve 7 can be set to 0%. Thus, the CPU 11 sets both the logical value of the valve opening and the actual valve opening to 0.
%, The temperature adjustment operation can be started.

By the way, the CPU 11 performs a limit process for restricting the target valve opening value obtained by the calculation within a range of 0 to 100%, and then, according to the target valve opening value and the logical value of the valve opening. Then, a drive signal for driving the valve driving motor 7 is output from the valve open contact output means 10a or the valve close contact output means 10b. Here, the valve travel time is, for example, 60
Assuming that the time is seconds, the valve opening target value is 50%, and the logical value of the valve opening is 0%, the CPU 11 drives the chilled water valve 7 from the valve opening contact driving means 10a for a time (30 seconds) required to open the chilled water valve 7 by 50%. What is necessary is just to output a signal.

The operation cycle of the CPU 11 is as follows.
Normally, the valve open contact 2
The on-time of 1a is integrated for each operation cycle, and the result is divided by the valve travel time to recognize as a change in the valve opening target value and to constantly compare it with the valve opening target value obtained by sequential calculation. As a result, the valve opening contact 21a
Alternatively, the driving time of the valve closing contact 21b is updated. When the valve opening target value obtained by the calculation is lower than the valve opening logical value, the CPU 11 causes the valve closing contact output means 10b to output a drive signal to the valve closing contact 21b to cause the valve closing contact 21b to output a drive signal. It turns on and turns the valve drive motor 7a in the direction to close the chilled water valve 7 to reduce the valve opening of the chilled water valve 7. However, the ON time of the valve closing contact 21b is different from the ON time of the valve opening contact 21a. The value is integrated as the opposite value, that is, a negative value, and the logical value of the valve opening is calculated.

Here, the valve travel time is represented by Tv (second),
The operation cycle of the CPU 11 is Tc (seconds), the number of times the valve open contact output means 10a outputs a drive signal for turning on the valve open contact 21a is No (times), and the valve close contact output means 10b turns on the valve close contact 21b. Nc is the number of times the drive signal has been output
(Times), the valve opening logical value Vo (%) is obtained by equation (1). However, it is assumed that 0 ≦ Vo ≦ 100.

Vo = 100 × Tc × (No−Nc) / Tv (1) As described above, the CPU 11 sets the total time and the valve travel time Tv when the valve open contact 21a or the valve close contact 21b is turned on, respectively. From this, the valve opening logical value Vo of the chilled water valve 7 is obtained. However, since the valve travel time Tv itself is not a very accurate value, the valve driving motor 7a repeatedly rotates and stops, and the chilled water valve 7 During the opening / closing operation, an error has occurred between the actual valve opening and the logical value of the valve opening.

However, in this air conditioning control apparatus, the CP
Since U11 calculates the valve opening target value based on the difference between the control target temperature and the current temperature detected by the temperature detecting means 9, an error occurs between the logical value of the valve opening and the actual valve opening. Even if it occurs, the influence of this error appears on the current temperature, and as a result, the influence of the error is reflected on the target valve opening degree, so that the error of the valve opening logical value is substantially canceled.

Incidentally, the range of the target valve opening obtained by the calculation of the CPU 11 is 0 to 100%, and the range of the logical value of the valve opening is also 0 to 100%. As shown in FIG. 11A, when the valve opening logical value VO is shifted to a side larger than the actual valve opening VB, when the valve opening target value becomes, for example, 100%, the CPU 11 outputs the valve opening contact output. A drive signal is output from the means 10a to the valve opening contact 21a to turn on the valve opening contact 21a, and the valve driving motor 7a is rotated in a direction to open the chilled water valve 7. As the chilled water valve 7 opens in response to the rotation of the valve drive motor 7a, the valve opening logical value VO gradually increases, and when the valve opening logical value VO becomes 100%, the valve opening contact driving means 10a is activated. The output of the drive signal is stopped, the valve opening contact 21a is turned off, and the valve driving motor 7a stops. Here, since the valve opening logical value VO is shifted to a side larger than the actual valve opening VB, the CPU 11 stops outputting the drive signal even though the actual valve opening VB is smaller than 100%. And
The chilled water valve 7 could not be opened 100%. At this time,
Even if the current temperature detected by the temperature detecting means 9 deviates from the control target temperature and the valve opening of the chilled water valve 7 needs to be further increased, since the logical value of the valve opening is 100%, Even though the actual valve opening is smaller than 100%, the CPU 11 cannot open the chilled water valve 7 any more, and there is a problem that the current temperature cannot follow the control target temperature.

Conversely, as shown in FIG. 11B, the same problem occurs when the valve opening logical value VO is shifted to a side smaller than the actual valve opening VB. That is,
When the valve opening target value becomes, for example, 0%, the CPU 11 causes the valve closing contact output means 10b to output a drive signal to the valve closing contact 21b to turn on the valve closing contact 21b, and to drive the valve in the direction to close the chilled water valve 7. The motor 7a is rotated. Here, as the chilled water valve 7 closes in response to the rotation of the valve driving motor 7a, the valve opening logical value VO gradually decreases, and the valve opening logical value V
When O becomes 0%, the valve closing contact driving means 10b stops outputting the drive signal, the valve closing contact 21b turns off, and the valve driving motor 7a stops. Here, the valve opening logical value V
Since O is shifted to a side smaller than the actual valve opening VB, the CPU 11 cannot close the chilled water valve 7 any more even though the actual valve opening VB is larger than 0%. Similarly to the above, there is a problem that the current temperature cannot be made to follow the control target temperature.

In order to prevent such a problem, the CP
U11 periodically outputs a drive signal for closing the chilled water valve 7 from the valve closing contact driving means 10b to the valve closing contact 21b irrespective of the valve opening target value, and the logical value VO of the valve opening is 0%.
, The chilled water valve 7 is fully closed by continuously outputting the drive signal for a certain period of time, so that the actual valve opening VB and the valve opening logical value VO are both 0% (so-called correction). Calibration), and then the CP
U11 returns to the normal temperature adjustment operation, and adjusts the valve opening of the chilled water valve 7 according to the valve opening target value. Similarly CPU
Reference numeral 11 denotes a drive signal for opening the chilled water valve 7 irrespective of the valve opening target value, which is transmitted from the valve opening contact driving means 10 a to the valve opening contact 2.
1a is periodically output, and the valve opening logical value VO is 100%
In this case, the chilled water valve 7 is fully opened by continuously outputting the drive signal for a certain period of time, so that the actual valve opening VB and the valve opening logical value VO are both set to 100% (so-called valve closing). The actual valve opening and the logical value of the valve opening could also be matched by performing full-open calibration.

[0015]

In the former air conditioning control apparatus, a motor unit that drives a valve while adjusting the rotation angle by itself is used, or a resistance value whose resistance value changes in proportion to the rotation angle of the motor is used. Since the vessel is provided in the valve driving motor, there is a problem that the cost of the apparatus is increased.

Further, in the latter air conditioning control device, the CP
Regardless of the control state of U11, since the valve full-close calibration or the valve full-open calibration is periodically performed, the valve 6 is in the full-closed state or the fully-opened state during the calibration, and the ability for temperature control is performed. However, there is a problem that the temperature of the control target greatly deviates from the control target temperature because the temperature of the control target is completely insufficient or conversely becomes excessive.

The present invention has been made in view of the above problems, and has as its object to reduce the error between the logical value of the valve opening and the actual valve opening without increasing the cost. It is another object of the present invention to provide an air conditioner that has a reduced influence on the temperature adjustment operation.

[0018]

To achieve the above object, according to the first aspect of the present invention, a valve for supplying cold water or hot water to heat exchange means for exchanging heat between cold water or hot water and air is provided. An air-conditioning control device that controls a valve opening degree to control the temperature of air, a driving signal generating unit that generates a driving signal for driving a valve driving motor that opens and closes a valve, and the air temperature control unit. Temperature detection means for detecting, a data memory for storing a valve travel time required for the valve drive motor to drive the valve from the fully open state to the fully closed state, a control target temperature, and parameters necessary for control calculation, and a drive signal generation The present valve opening is calculated from the sum of the time during which the drive signal is generated and the valve travel time, and the valve opening target value of the valve is calculated from the temperature detected by the temperature detecting means and the control target temperature. The current found in A central processing unit that calculates a drive time for generating a drive signal from a difference between the valve opening degree and the target valve opening degree and a valve travel time, and generates a drive signal from drive signal generation means only for the drive time. When the valve opening target value becomes approximately 0% or approximately 100%, the central processing unit generates a driving signal from the driving signal generating means for a time obtained by adding a predetermined time to the driving time. hand,
With the actual valve opening being approximately 0% or approximately 100%,
The present invention is characterized in that the current valve opening obtained by calculation is set to approximately 0% or approximately 100%, and a calibration operation for matching the actual valve opening with the valve opening obtained by calculation is performed.
Therefore, only when the valve opening target value VC becomes 0% or 100%, the calibration operation is performed.
The influence of the calibration operation on the temperature adjustment operation can be reduced.

According to a second aspect of the present invention, in the first aspect, the valve opening target value is substantially 0% while the valve opening target value is substantially 0% and the central processing unit performs the calibration operation. %, The central processing unit sets the valve opening obtained by the calculation to approximately 0%, returns to the normal temperature adjustment operation, and sets the valve opening target value to approximately 100%, and sets the valve opening target to approximately 100%. If the valve opening target value changes from approximately 100% while the arithmetic processing unit performs the calibration operation, the central processing unit sets the valve opening calculated by the arithmetic operation to approximately 100%, and sets the normal temperature. Since the adjustment operation has been returned, during the calibration operation, the change in the valve opening affects the temperature of the control target, and when the valve opening target value changes, the calibration operation is immediately terminated. , Temperature by calibration operation It is possible to further reduce the influence of the integer operation.

According to the third aspect of the present invention, the temperature of the air is controlled by adjusting the valve opening of a valve for supplying cold or hot water to the heat exchange means for exchanging heat between the cold or hot water and the air. An air-conditioning control device, wherein a drive signal generating means for generating a drive signal for driving a valve drive motor for opening and closing the valve, a temperature detection means for detecting the temperature of the air, and the valve drive motor controls the valve. A data memory that stores the valve travel time required to drive from the fully open state to the fully closed state, the control target temperature, and the parameters required for control calculation, and the sum of the time during which the drive signal generation means generated the drive signal and the valve travel time And the current valve opening degree is calculated from the temperature and the control target temperature detected by the temperature detecting means, and the current valve opening degree and the valve opening degree target value obtained by the calculation are calculated. And valve travel A central processing unit for calculating a driving time for generating a driving signal from the time, and generating a driving signal from the driving signal generating unit for the driving time, wherein the central processing unit sets the lower limit value of the valve opening target value to 0. % And set the upper limit of the target valve opening to 100%.
When the valve opening target value is equal to the lower limit value, the central processing unit generates a driving signal in the direction of closing the valve from the driving signal generation means, and the valve opening target value is set to the upper limit. If the value becomes equal to the value, the central processing unit generates a drive signal in the direction of opening the valve from the drive signal generation means, and performs a calibration operation for matching the actual valve opening with the valve opening obtained by the calculation. It is characterized by performing. Therefore, by expanding the range of the valve opening target value to the lower limit or the upper limit, while the error between the logical value of the valve opening and the actual valve opening is within the expanded range, the valve position of the valve is not changed. Since the calibration operation is not performed, the influence of the calibration operation on the temperature adjustment operation can be reduced. Further, when the error between the logical value of the valve opening and the actual valve opening is expanded beyond the expanded range, the valve is calibrated, so that the error can be corrected to improve the control accuracy. it can.

According to a fourth aspect of the present invention, in the third aspect of the invention, when the target valve opening exceeds approximately 100%, the central processing unit generates only a drive signal for opening the valve from the drive signal generating means. When the target value of the valve opening is less than approximately 0%, the central processing unit generates only the driving signal in the direction of closing the valve from the driving signal generating means. Even if the error with the valve opening falls within the extended range, if the valve opening target value once enters the extended range and then returns to the range of 0 to 100%, the valve is opened in the process. The error of the logical value can be corrected.

According to a fifth aspect of the present invention, in the first to fourth aspects of the present invention, at the start of the temperature adjustment operation, the central processing unit generates a drive signal for fully closing or fully opening the valve from the drive signal generating means, and performs the calculation. Approximately 0% or approximately 100
Since the calibration operation for setting the% is performed, the temperature adjustment operation can be started in a state where the logical value of the valve opening and the actual valve opening are matched.

According to a sixth aspect of the present invention, in the first to fifth aspects of the present invention, at the end of the temperature adjustment operation, the central processing unit generates a drive signal for fully closing or fully opening the valve from the drive signal generating means, and performs the calculation. Approximately 0% or approximately 100
Since the calibration operation for setting the% is performed, it is not necessary to perform the calibration operation at the next temperature adjustment operation start, and the temperature adjustment operation can be started immediately.

[0024]

Embodiments of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 shows a schematic configuration diagram of a system using the air-conditioning control device of the present embodiment. Reference numeral 1 denotes an outside air intake for taking in outside air, and the outside air taken in from the outside (OA) via the air intake 1 is taken into the air conditioner B via the outside air damper 14.

The air conditioner B exchanges heat between the outside air taken in through the outside air damper 14 and the cold water or the hot water to cool or heat the outside air. It comprises a blower 4 which pressurizes the outside air cooled or heated by the cold water coil 2 or the hot water coil 3 and supplies it to the room (SA) from the outlet 5. 1
3 is a blower power board for driving the blower 4,
The blower power panel 13 outputs to the air conditioning control device DDC an input contact 13a in which a control signal for starting or stopping the blower 4 is input from an air conditioning control device DDC described later, and a signal indicating an operation state of the blower 4. Output contact 1 for
3b. Here, when the blower 4 is stopped, the outside air damper 14 is connected to the air conditioning controller DD.
C in response to the control signal input from C
The air passage 15 from the air conditioner to the air conditioner B is shut off to prevent unnecessary outside air from entering the room. Reference numeral 6 denotes a temperature detector provided in an air passage between the air outlet of the blower 4 and the outlet 5 for detecting the outlet temperature of the air blower 4 and outputting a detection signal to the air conditioning controller DDC. ing. In the present embodiment, the temperature detector 6 detects the outlet temperature of the blower 4, but may detect the indoor temperature.

A chilled water pipe 16 circulates chilled water through the chilled water coil 2. The chilled water pipe 16 is provided with a chilled water valve 7 for adjusting the amount of chilled water supplied to the chilled water coil 2. Reference numeral 17 denotes a hot water pipe for circulating hot water through the hot water coil 3. The hot water pipe 17 is provided with a hot water valve 8 for adjusting the amount of hot water supplied to the hot water coil 3. The cold water valve 7 and the hot water valve 8 are provided with a cold water valve driving unit 22a and a hot water valve driving unit 22b for opening and closing the respective valves. Each of the valve drive units 22a and 22b has the same configuration as that of the chilled water valve drive unit 22 shown in FIG. 10 described in the conventional example, and a description thereof will be omitted.

The air-conditioning controller DDC has a data memory 1 in which a control target temperature and parameters for control calculation are stored.
2 and the detection signal input from the temperature detector 6 to the air conditioner B
A / D input unit (AI) 9 serving as a temperature detecting means for converting the temperature into an outlet temperature, a control target temperature and control calculation parameters stored in data memory 12, and air conditioning input from A / D input unit 9. CPU 11 which is a central processing unit for calculating a valve opening target value based on the outlet temperature of the air conditioner B, and outputs control signals to the blower power panel 13 and the outside air damper 14, and each valve 7 obtained by the calculation of the CPU 11 , 8 in accordance with the difference between the current valve opening (hereinafter referred to as the valve opening logical value) and the target valve opening, a drive signal for driving each of the valve driving motors 7a, 8a is transmitted to each of the valve driving units 22a. , 22b, and a digital input section (DI) 19 to which a signal indicating the operating state of the blower 4 is input from the blower control panel 13.

The operation of the air conditioning controller DDC will be described with reference to a flowchart shown in FIG. The operation of the hot water valve 8 is the same as the operation of the cold water valve 7, and a description thereof will be omitted.
At the start of the temperature adjustment operation, the air-conditioning control device DDC reads the valve travel time and parameters necessary for control calculation from the data memory 12 (step S ₁ ).

Since the air conditioning controller DDC is not provided with a means for detecting the present valve opening of the chilled water valve 7, the actual valve opening of the chilled water valve 7 and the logic of the valve opening at the start of the temperature adjustment operation. Must match the value. Therefore, in step S _2, CPU 11 is a cold water valve drive unit 22a
A drive signal for operating the chilled water valve drive unit 22a in the direction to close the chilled water valve 7 in a direction required to drive the chilled water valve 7 from fully open to fully closed (valve travel time) is transmitted from the digital output unit 10 to the chilled water valve. The output is made to the drive unit 22a. Then, when the valve travel time elapses from the start of the temperature adjustment operation and the chilled water valve 7 is fully closed, the CPU 11 sets the valve opening logic value of the chilled water valve 7 to 0%, and sets the valve opening logic. The value and the actual valve opening are both made to coincide with 0% (hereinafter, this operation is referred to as valve full-close calibration). When the valve fully closed calibration is completed, CPU 11 starts the temperature control operation in step S _3, activates the elapsed timer for measuring the elapsed time from the time of the temperature adjustment operation is started at Step S _4, the temperature in Step S ₅ to continue adjusting operation proceeds to step S _6.

[0030] Next, CPU11, in step S ₆ A /
The current outlet temperature of the blower 4 is read from the D input unit 9,
Calculates the valve opening target value VC by a digital PID calculation in step S _7, calculates a valve opening logic value VO at step S _8. At this time, the CPU 11 performs a limit process for limiting the upper limit value of the valve opening target value VC to 100% and the lower limit value to 0%. Further, the CPU 11 subtracts the total value of the driving time of the chilled water valve 7 in the closing direction from the total value of the driving time of the chilled water valve 7 in the opening direction to obtain a ratio (%) to the valve travel time. The valve opening logical value VO of the valve 7 is obtained.

Then, if the valve opening target value VC is 0 <VC <1
If it is within the range of 00 (%) (step S ₉ ), the CPU
11 compares the valve opening target value VC and the valve opening logic value VO at step S _10, if the numbers match, step S ₁₆
In stops outputting the drive signal to the cold water valve driving section 22a from the digital output section 10, the process proceeds to step S _17. on the other hand,
If the two are different in step S _10, calculates a driving time of outputting the drive signal to the cold water valve drive unit 22a from the difference between the valve opening target value VC and the valve opening logic value VO at step S _11. Here, the value obtained by dividing the valve travel time by 100 is
In order to open and close the valve opening of the chilled water valve 7 by 1%, a unit driving time for outputting a drive signal from the digital output unit 10 to the chilled water valve driving unit 22a is set. The drive time of the chilled water valve drive unit 22a is calculated by multiplying the difference from the opening degree logical value VO by the unit drive time.

[0032] Then, CPU 11 compares the magnitude of the valve opening target value VC and the valve opening logic value VO at step S _12, if the valve opening target value VC is greater than the valve opening logic value VO ,
The direction of the drive signal for opening the cold water valve 7 in step S ₁₃ is outputted from the digital output unit 10 only driving time in cold water valve drive unit 22a, when the valve opening target value VC is less than the valve opening logic value VO, steps a drive signal in a direction of closing the cold water valve 7 is output from the digital output unit 10 only driving time in cold water valve drive unit 22a at S _14. Then, the process returns to step S ₅ to check the elapsed time of the elapsed timer at the step S _15,
The above operation is repeatedly executed.

On the other hand, step S₉And the valve opening target value VC becomes
If it reaches 100%, step S ₁₈And CPU 11
Are the current valve opening logical value VO and the valve opening target value VC (immediately
Chilled water valve drive unit 22 determined from the difference from
a for a predetermined time (valve travel)
Open the chilled water valve 7 only for the time obtained by adding about 30% of the time).
The chilled water valve drive from the digital output unit 10
Output to the section 22a to fully open the chilled water valve 7, and open the actual valve
The degree VB is definitely set to 100%. And the CPU 11
The valve opening logical value VO is set to 100%, and the valve opening logical value VO is
Match the actual logical value VB to 100% (valve complete
Open calibration). Then, step S₁₇In CP
U11 clears the elapsed timer and proceeds to step S_FiveBack to
Then, the above processing is repeated.

Further, if the valve opening target value VC becomes 0% at step S _9, in step S _19, CPU 11, the current valve opening logic value VO and valve opening degree target value VC (i.e., 0
%), A drive signal in the direction to close the chilled water valve 7 is digitalized for a time obtained by adding a predetermined time (approximately 30% of the valve travel time) to the drive time of the chilled water valve drive unit 22a obtained from the difference from the drive signal. From the output unit 10 to the chilled water valve drive unit 22a
And the chilled water valve 7 is fully closed, and the actual valve opening VB is reliably set to 0%. Then, the CPU 11 sets the valve opening degree logical value VO to 0%, and sets the valve opening degree logical value VO to the actual logical value VB.
Are both equal to 0% (valve fully closed calibration). Thereafter, in CPU11 step S ₂₀ clears the elapsed timer, the process returns to step S _5, and the above processing is repeated.

If the valve opening target value VC obtained by the calculation of the CPU 11 is within the range of 0 <VC <100 (%), the CPU 11 does not perform the calibration operation. An error occurs between the valve opening degree VB and the valve opening degree logical value VO. However, since the influence of this error appears as a deviation between the temperature of the control target and the control target temperature, the valve opening target value VC is corrected by the calculation of the CPU 11 in a direction to reduce the deviation.
Although there is a problem with the control accuracy, the temperature adjustment operation itself does not become defective.

Here, as shown in FIG. 3 (a), when the valve opening logical value VO is shifted to a side larger than the actual valve opening VB, the valve opening target value VC becomes 100%. Then, C
The PU 11 performs the valve full-open calibration as described above, but the CPU 11 sets the valve opening degree logical value VO by 1 from the current value.
The direction in which the chilled water valve 7 is opened for a time obtained by adding a predetermined time [section T ₂ in FIG. 3 (a)] to a time (section T ₁ in FIG. 3 (a)) until the time reaches 00%. Is output from the digital output unit 10 to the chilled water valve drive unit 22a,
Since the chilled water valve 7 is driven in the opening direction by using the chilled water valve drive unit 22a, the actual valve opening VB of the chilled water valve 7 is reliably set to 1
00%, and both the valve opening logical value VO and the actual valve opening VB can be made to coincide with 100%.

Similarly, as shown in FIG. 3 (b), when the valve opening logical value VO is shifted to a side smaller than the actual valve opening VB, the valve opening target value VC becomes 0. %To become and,
The CPU 11 performs the valve full-close calibration as described above. However, the CPU 11 presets a time (a section T ₃ in FIG. 3B) until the valve opening logical value VO becomes 0% from the current value. From the digital output unit 10 to the chilled water valve driving unit 22 for the time obtained by adding the calculated time [section T ₄ in FIG.
a, a drive signal in the direction to close the chilled water valve 7 is output, and the chilled water valve 7 is driven in the direction to close the chilled water valve 7 using the chilled water valve drive unit 22a. %
The logical value VO of the valve opening and the actual valve opening V
B and B can both be equal to 0%.

Further, CPU 11, upon completion of the temperature adjustment operation in step S _5, performs the valve fully closed calibration operation in step S _2. At this time, the CPU 11 sends the chilled water valve from the digital output unit 10 to the chilled water valve driving unit 22a for a time obtained by adding a fixed time (about 30% of the valve travel time) to the time required for setting the logical value VO of the valve opening to 0%. Since the drive signal for closing the chilled water 7 is output and the chilled water valve 7 is driven in the closing direction using the chilled water valve drive unit 22a, the actual valve opening VB of the chilled water valve 7 is reliably set to 0%. Thus, both the valve opening logical value VO and the actual valve opening VB can be made equal to 0%. Therefore, the next time the CPU 11 performs the temperature adjustment operation, since the valve opening logical value VO and the actual valve opening VB are both 0%, the temperature adjustment is immediately performed without performing the calibration operation. Actions can be taken.

As described above, in this embodiment, only when the valve opening target value VC becomes 0% or 100%, the CPU 1
1 performs the calibration operation, so that a large temperature change does not occur as compared with the case where the calibration operation is performed at regular intervals regardless of the control state. Further, the cold water valve driving unit 22a and the hot water valve driving unit 22b
In addition, since there is no motor unit that drives the valve while adjusting the rotation angle by itself, or a resistor that changes the resistance value in proportion to the rotation angle of the motor is not provided in the valve driving motor, There is no increase in cost.

(Embodiment 2) In Embodiment 1, only when the valve opening target value VC becomes 0% or 100%, the CPU
11 performs the calibration operation, so that the influence of the calibration operation on the temperature adjustment operation can be reduced as compared with the case where the calibration operation is performed at regular intervals irrespective of the control state.

However, when the valve opening target value VC is 0 <V
When the CPU 11 performs the temperature adjustment operation for a long time in the range of C <100 (%), an error between the valve opening logical value VO and the actual valve opening VB increases. Therefore, the error between the valve opening logical value VO when the valve opening target value VC becomes 0% or 100% and the actual valve opening VB increases, and the valve opening greatly changes by the calibration operation. Therefore, there is a possibility that the temperature of the control target may change significantly.

For example, when the actual valve opening VB of the chilled water valve 7 is 7
If the valve opening target value VC becomes 100% when the valve opening logical value VO is 98% and the valve opening logical value VO is 98%, the valve opening is increased from 98% to 100% (actual valve opening degree) in the temperature adjustment operation. VB to 7
From 0% to 72%) If it is increased by 2%, the cold water valve 7
Should be adjusted to a desired value to control the temperature of the controlled object constant, but the target valve opening value V
When C becomes 100%, the CPU 11 performs the valve full-open calibration and drives the chilled water valve drive unit 22a for a further fixed time to bring the chilled water valve 7 to the fully opened state, so that the actual valve opening VB is 70%. To 100%.

Therefore, since the valve opening of the chilled water valve 7 is 28% larger than the desired valve opening of 72% at this time, the temperature of the controlled object greatly changes. for that reason,
After the calibration operation is completed, when the CPU 11 returns to the normal temperature adjustment operation, the CPU 11
The temperature deviation is corrected by driving the chilled water valve 7 in a direction to eliminate the temperature deviation using 2a. As described above, since the calibration operation is performed, the temperature control accuracy is deteriorated as compared with the normal temperature adjustment operation. Therefore, the control system having a short response time such as controlling the outlet temperature of the air conditioner B is particularly preferable. It is expected that the deviation will increase to an unacceptable range.

Therefore, in the present embodiment, even when the CPU 11 is performing the calibration operation, if the valve opening target value VC obtained by the sequential calculation is not 0% or 100%, the CPU 11 immediately starts the valve operation. Opening logical value V
O is set to 0% or 100%, the calibration operation ends, and the operation returns to the normal temperature adjustment operation. Therefore, in the above-described example, if the actual valve opening VB increases and exceeds the desired valve opening 72%, the current temperature of the control target exceeds the control target temperature too much, and the valve opening theoretical value VC becomes 100%.
%, The CPU 11 immediately sets the valve opening logical value VO to 100% at that point, terminates the calibration operation, and returns to the normal temperature control operation. The effect can be reduced.

The operation of this air conditioning control device DDC is
Description will be given with reference to the flowchart of FIG.
I do. The configuration of the air conditioning controller DDC is the same as that of the embodiment.
1 and the description thereof is omitted. Also,
Top S₁~ S₉, Step S _Ten~ S₁₇Operation up to
Since it is the same as the first embodiment, the description is omitted. Step
S₉When the valve opening target value VC reaches 100% at
11 is Step S_{twenty two}And the calibration flag is off.
Judge whether or not it is. Step S_{twenty two}Calibration
If the on flag is on, the CPU 11 proceeds to step S_FiveTo
Return and repeat the above process to calculate the valve opening target value VC
And the valve opening target value VC is in the range of 0 <VC <100%
It is determined whether or not. Step S_{twenty two}Calibration with
If the flag is off, the CPU 11 proceeds to step S_{twenty three}so
Check the calibration timer and go to step S
_{twenty four}Chilled water from the digital output unit 10 to the chilled water valve drive unit 22a
A drive signal for opening the valve 7 is output, and the chilled water valve drive unit 2 is output.
2a, the chilled water valve 7 is driven in the opening direction, and step S
_{twenty five}The setting time of the calibration timer has elapsed
It is determined whether or not. Step S_{twenty five}Calibration with
If the set time of the timer has not elapsed, the CPU 11
Is the step S_FiveAnd repeat the above process to open the valve.
Is calculated so that the valve opening target value VC is 0 <VC
It is determined whether it is within the range of <100%. Step S_{twenty five}so
If the set time of the calibration timer has elapsed
In this case, the CPU 11₂₆Calibration with
Turn on the flag and step S₂₇Digital output unit 10
From the output of the drive signal to the chilled water valve drive unit 22a,
Step S₂₈Clear calibration timer with
And step S_FiveReturn to

Therefore, if the valve opening target value VC remains at 100% during the valve full-open calibration operation,
The CPU 11 causes the digital output unit 10 to output a drive signal for opening the chilled water valve 7 from the digital output unit 10 to the chilled water valve driving unit 22a for the elapsed time of the calibration timer, and drives the chilled water valve 7 in the opening direction. On the other hand, if the valve opening target value VC obtained by the sequential calculation falls within the range of 0 <VC <100% during the valve full-opening calibration operation (step S ₉ ), the CPU 11 sets the calibration flag in step S ₂₁ . turned off, by setting the valve opening logic value VO to 100%, the process proceeds to step S _10, returns to the normal temperature control operation.

Meanwhile, when the valve opening target value VC becomes 0% at step S _9, CPU 11 is particulate calibration flag is turned on or not is determined in step S _29. Step S
_{If the} calibration flag is on at ₂₉ , the CPU
11 repeats the above process returns to step S _5, and calculates the valve opening target value VC, the valve opening target value VC is 0 <V
It is determined whether or not C is within the range of 100%. Step S ₂₉
If the calibration flag is off at
1 checks the calibration timer in step S _30, the cold water valve 7 is closed to output the drive signal in a direction to the cold water valve drive unit 22a from the digital output unit 10 in step S _31, using a cold water valve driving portion 22a drives the cold water valve 7 closing direction, the set time of the calibration timer to determine whether the elapsed in step S _32. Step S
₃₂ when not reached the set time of the calibration timer, CPU 11 repeats the processing described above returns to the step S _5, and calculates the valve opening target value VC, the valve opening target value VC is 0 <VC It is determined whether it is within the range of <100%. If the set time has elapsed calibration timer in step S _32, CPU 11, the step S ₃₃
To turn on the calibration flag, and step _S34
In stops outputting the drive signal to the cold water valve driving section 22a from the digital output section 10, to clear the calibration timer in step S _35, the flow returns to step S _5.

Accordingly, if the valve opening target value VC remains at 0% during the valve fully closing calibration operation, the CP
U11 causes the digital output unit 10 to output a drive signal for closing the chilled water valve 7 from the digital output unit 10 to the chilled water valve 7 for the elapsed time of the calibration timer, and drives the chilled water valve 7 in the closing direction. On the other hand, during the valve fully-closed calibration operation, the valve opening target value VC obtained by successive calculation
There 0 <VC <Once in 100% of the range (Step S _9), CPU 11 turns off the calibration flag in step S _21, sets the valve opening logic value VO to 0%, the step S ₁₀ And returns to the normal temperature control operation.

(Embodiment 3) In the present embodiment, the lower limit value of the valve opening target value VC is set to a value smaller than 0% (-X%) in the air conditioning controller of Embodiment 1, The upper limit value of the opening target value VC is set to a value (100 + Y) (%) larger than 100%. For example, in the present embodiment, assuming that X = Y = 20%, the ranges of the valve opening target value VC and the valve opening logical value VO are set to (−20%) to 12 respectively.
It is expanded to 0%, and the CPU 11 performs digital PID calculation.

The operation of the air conditioner is described by the chilled water valve 7.
Will be described with reference to the flowchart of FIG. Note that the configuration of the air-conditioning control device is the same as that of the first embodiment, and a description thereof will be omitted. The basic operation of the air-conditioning control device is the same as the operation shown in the flowchart of FIG. 2, and therefore, the same processes are denoted by the same reference characters, and description thereof will be omitted. Only different portions will be described. I do.

The CPU 11 determines in step S₆~ S₈Open with
Degree target value VC is calculated, and step S ₉'To set the valve opening target value V
C is in the range of (-X) <VC <(100 + Y)
Determine whether or not. As shown in FIGS. 6A and 6B, the valve is opened.
Degree target value VC is in the range of (−X) <VC <(100 + Y)
If it is within the range, the CPU 11 executes the processing described in the first embodiment.
Tep S₁₁~ S_FifteenIs calculated, and step S is performed._FiveBack to
The above processing is repeated.

On the other hand, as shown in FIG. 7A, when the valve opening target value VC becomes equal to the upper limit (100 + Y) in step S ₉ ′, the CPU 11 switches the chilled water valve 7 in step S ₁₈ ′. A driving signal in the opening direction is output from the digital output unit 10 to the chilled water valve driving unit 22a, and the chilled water valve 7 is driven in the opening direction using the chilled water valve driving unit 22a to perform a calibration operation (FIG. 7A). Section T ₅ ].

[0053] Further, as shown in FIG. 7 (b), 'when the valve opening target value VC is equal to the lower limit value (-X) in, CPU 11, the step S _19' Step S ₉ cold water valve 7 Is output from the digital output unit 10 to the chilled water valve driving unit 22a, and the chilled water valve 7 is driven to open using the chilled water valve driving unit 22a to perform a calibration operation [FIG. b) section T ₆ of].

The actual range of the valve opening degree VB is 0 to
Since it is 100%, if the valve opening target value VC exceeds 100%, an error necessarily occurs between the valve opening logical value VO and the actual valve opening VB. Similarly, in a range where the valve opening target value VC is less than 0%, an error necessarily occurs between the valve opening logical value VO and the actual valve opening VB. However, even if the valve opening target value VC is limited to the range of 0 to 100%, it is expected that some error will occur between the valve opening logical value VO and the actual valve opening VB. An error generated by expanding the range of the opening target value VC is previously accepted, and the chilled water valve 7 is opened and closed. Further, when an error occurs that is equal to or greater than the extension of the range of the target valve opening VC, the error is corrected so as to fall within the extension range of the target valve opening VC at that time.

As described above, the expected valve opening logical value VO
And the actual valve opening VB, the valve opening target value V
If the range between C and the valve opening logical value VO is extended from 0 to 100%, calibration is performed while the error between the valve opening logical value VO and the actual valve opening VB is within the extended range. Since the calibration operation is not performed, it is possible to prevent the temperature of the control target from suddenly changing due to the calibration operation. In addition, since the amount of error correction becomes smaller, the influence on the temperature of the control target can be suppressed.

(Embodiment 4) In the air-conditioning control apparatus according to Embodiment 3, the CPU 11 performs the calibration operation only when the valve opening target value VC has reached the upper limit value or the lower limit value. Of the error between the valve opening logical value VO and the actual valve opening VB, only the portion exceeding the extension (-X%, Y%) of the valve opening target value VC is corrected.
An error for the extension remains.

For example, when the range of the valve opening target value VC and the valve opening logical value VO is extended to (−20) to 120%, the valve opening target value V obtained by the calculation of the CPU 11 is obtained.
Assume that C becomes 98% and the valve opening logical value VO becomes 98%. At this time, it is assumed that the actual valve opening VB is 88% and there is an error of 10% between the logical value VO of the valve opening and the actual valve opening VB. Here, assuming that the valve opening target value VC obtained in the next operation cycle has increased by 20% to 118%, the CPU 11 calculates the valve travel time based on the valve travel time.
A drive signal for driving the valve in the direction to open the valve is output from the digital output unit 10 to the valve drive unit for the time required to open the valve by 20%. After the valve drive unit drives the valve according to the drive signal, , The valve opening target value VC and the valve opening logical value VO are both 1
18%, and the actual valve opening VB is 100%. afterwards,
When the valve opening target value VC reaches 100%, the CPU 11
A drive signal in the direction to close the valve is output from the digital output unit 10 to the valve drive unit for the time required to close the valve by 18%, so that the actual valve opening VB becomes 82%, and the valve opening logical value VO And the actual valve opening VB is increased to 18%.

Therefore, in the present embodiment, when the valve opening target value VC is smaller than 0% and larger than the lower limit (-X%) in the air conditioning control apparatus of Embodiment 3, the valve is closed. , And only the valve opening target value V
C is larger than 100% and the upper limit (100 + Y)%
If it is smaller than the threshold value, only the drive signal for opening the valve is output, and the normal temperature adjustment operation is performed when the valve opening target value VC is in the range of 0 to 100%. Therefore, as shown in FIG. 9A, even if the valve opening target value VC changes from 118% to 100%, the CPU 11 outputs a drive signal for closing the valve from the digital output unit 10 to the valve drive unit. Therefore, the actual valve opening VB remains at 100%, and the actual valve opening VB, the valve opening target value VC, and the valve opening logical value VO all become 100%. Is performed. Similarly, as shown in FIG. 9B, even if the valve opening target value VC changes from a value smaller than 0% to 0%, the CPU 11 outputs a drive signal for opening the valve from the digital output unit 10. The actual valve opening VB remains at 0% because the output is not output to the valve drive unit, and the actual valve opening V
B, the valve opening target value VC, and the valve opening logical value VO both become 0%, and the calibration operation is substantially performed.

The operation of this air conditioning control device is
Will be described with reference to the flowchart of FIG. Note that the configuration of the air-conditioning control device is the same as that of the first embodiment, and a description thereof will be omitted. The basic operation of the air-conditioning control device is the same as the operation shown in the flowchart of FIG. 5, and therefore, the same processes are denoted by the same reference characters, and description thereof will be omitted. Only different portions will be described. I do.

If the valve opening target value VC obtained by the calculation of the CPU 11 is within the range of (lower limit value) <VC <(upper limit value), the CPU 11 performs the calculations in steps S ₁₀ and S ₁₁ , in step S ₁₂ compares the magnitude relationship between the valve opening target value VC and the valve opening logic value VO. When the valve opening target value VC is larger than the valve opening logical value VO, the CPU 11 determines whether or not the valve opening target value VC is smaller than 0% in step _S36 . As a result, when the valve opening target value VC is not less than 0%, CPU 11 is a cold water valve drive unit 2 in the direction of the driving signal from the digital output section 10 to open the cold water valve 7 in step S ₃₇
Output to 2a, and driven in the direction of opening the cold water valve 7 with cold water valve driving portion 22a, to check the elapsed timer at step S _15, the flow returns to step S _5. On the other hand, the valve opening target value V
If C is smaller than 0%, the CPU 11 proceeds to step S
Stops outputting the drive signal to the cold water valve driving section 22a from the digital output section 10 at _40, check the elapsed timer at step S _15, the flow returns to step S _5.

[0061] As a result of comparing the magnitude relationship between the valve opening target value VC and the valve opening logic value VO at step S _12, if the valve opening target value VC is less than the valve opening logic value VO, CPU 11
The valve opening target value VC at step step S ₃₈ 100%
It is determined whether it is greater than. As a result, when the valve opening target value VC is less than 100%, CPU 11 has the direction of the drive signal for closing the cold water valve 7 is output from the digital output unit 10 to the cold water valve drive unit 22a in step S _39, the cold water valve drive and driven in the direction of closing the cold water valve 7 using parts 22a, and checks the elapsed timer at step S _15, the flow returns to step S _5. On the other hand, if the valve opening target value VC is greater than 100%, CPU 11 includes a digital output unit 1 in step S ₄₀
Stops outputting the drive signal to the cold water valve driving section 22a from 0, check the elapsed timer at step S _15, the flow returns to step S _5.

As described above, the valve opening target value VC is 100%
Exceeds the target valve opening degree VC, the valve opening degree logical value V
Even if it becomes smaller than O, the CPU 11 does not output a drive signal for closing the chilled water valve 7 from the digital output unit 10 to the chilled water valve driving unit 22a. Similarly, if the valve opening target value VC is 0
%, The CPU 11 outputs a drive signal for opening the chilled water valve 7 from the digital output unit 10 to the chilled water valve driving unit 22a even if the valve opening target value VC is larger than the valve opening logical value. Therefore, even if an error occurs between the valve opening target value VC and the valve opening logical value VO, when the valve opening target value VC returns to the range of 0 ≦ VC ≦ 100 (%), The error between the two can be automatically corrected. Accordingly, the valve opening does not suddenly change during the correction operation, does not adversely affect the temperature of the control target, and reduces the error between the valve opening logical value VO and the actual valve opening VB. be able to. Further, similarly to the third embodiment, when the valve opening target value VC becomes the lower limit value (−X)%, a drive signal for closing the chilled water valve 7 is output from the digital output unit 10 to the chilled water valve driving unit 22a. When the valve opening target value VC reaches the upper limit value (100 + Y)%, a drive signal for opening the chilled water valve 7 is transmitted from the digital output unit 10 to the chilled water valve driving unit 2.
Calibration operation is performed by outputting to 2a.

[0063]

As described above, according to the first aspect of the present invention, the opening degree of the valve for supplying cold water or hot water to the heat exchange means for exchanging heat between cold water or hot water and air is adjusted. An air conditioning control device that controls the temperature of air, a drive signal generating unit that generates a drive signal for driving a valve drive motor that opens and closes a valve, and a temperature detection unit that detects the temperature of air. A data memory for storing a valve travel time required for the valve drive motor to drive the valve from a fully open state to a fully closed state, a control target temperature, and parameters required for control calculation;
The current valve opening is calculated from the sum of the time during which the drive signal generating means has generated the drive signal and the valve travel time, and the valve opening target value of the valve is calculated from the temperature detected by the temperature detecting means and the control target temperature. At the same time, a drive time for generating a drive signal is calculated from the difference between the current valve opening and the valve opening target value obtained by the calculation and the valve travel time, and a drive signal is generated from the drive signal generating means for the drive time. A central processing unit, wherein when the valve opening target value becomes approximately 0% or approximately 100%, the central processing unit generates a driving signal for a time obtained by adding a predetermined time to the driving time. A drive signal is generated from the means to reduce the actual valve opening to approximately 0% or approximately 10%.
0%, and the current valve opening obtained by the calculation is approximately 0%.
% Or substantially 100%, and performs a calibration operation for matching the actual valve opening with the valve opening obtained by calculation. Therefore, the calibration operation is performed only when the valve opening target value VC becomes 0% or 100%, so that the error between the valve opening logical value and the actual valve opening is reduced, and the calibration operation is performed. This has the effect of reducing the effect on the temperature adjustment operation due to. Also, it is not necessary to use a motor unit that drives the valve while adjusting the rotation angle by itself, or to provide a valve drive motor with a resistor whose resistance value changes in proportion to the rotation angle of the motor, for the valve drive motor. Therefore, the cost of the entire apparatus does not increase.

According to a second aspect of the present invention, the target value of the valve opening is approximately 0%.
When the target value of the valve opening degree changes from approximately 0% while the central processing unit performs the calibration operation, the central processing unit sets the valve opening obtained by the calculation to approximately 0%. ,
When the valve opening target value changes from approximately 100% while the central processing unit performs the calibration operation while returning to the normal temperature adjustment operation and the valve opening target value becomes approximately 100%, the center The arithmetic processing unit sets the valve opening obtained by the calculation to approximately 100% and returns to the normal temperature adjustment operation. Therefore, during the calibration operation, a change in the valve opening affects the temperature of the control target. When the target value of the valve opening changes, the calibration operation is immediately terminated, so that the effect of the calibration operation on the temperature adjustment operation can be further reduced.

According to a third aspect of the present invention, the temperature of the air is controlled by adjusting the opening of a valve for supplying cold or hot water to a heat exchange means for exchanging heat between cold or hot water and air. An air-conditioning control device, wherein a drive signal generating means for generating a drive signal for driving a valve drive motor for opening and closing the valve, a temperature detection means for detecting the temperature of the air, and the valve drive motor controls the valve. A data memory that stores the valve travel time required to drive from the fully open state to the fully closed state, the control target temperature, and the parameters required for control calculation, and the sum of the time during which the drive signal generation means generated the drive signal and the valve travel time And the current valve opening degree is calculated from the temperature and the control target temperature detected by the temperature detecting means, and the current valve opening degree and the valve opening degree target value obtained by the calculation are calculated. Difference and valve travel A central processing unit for calculating a driving time for generating a driving signal from the time and generating a driving signal from the driving signal generating means for the driving time, wherein the central processing unit sets the lower limit value of the valve opening target value to 0. % And set the upper limit of the target valve opening to 100%.
When the valve opening target value is equal to the lower limit value, the central processing unit generates a driving signal in the direction of closing the valve from the driving signal generation means, and the valve opening target value is set to the upper limit. If the value becomes equal to the value, the central processing unit generates a drive signal in the direction of opening the valve from the drive signal generation means, and performs a calibration operation for matching the actual valve opening with the valve opening obtained by the calculation. It is characterized by performing. Therefore, by expanding the range of the valve opening target value to the lower limit or the upper limit, while the error between the logical value of the valve opening and the actual valve opening is within the expanded range, the valve position of the valve is not changed. Since the calibration operation is not performed, the influence of the calibration operation on the temperature adjustment operation can be reduced. Further, when the error between the logical value of the valve opening and the actual valve opening is expanded beyond the expanded range, the valve calibration operation is performed, so that the error can be reduced and the control accuracy can be improved. There is. Also, it is not necessary to use a motor unit that drives the valve while adjusting the rotation angle by itself, or to provide a valve drive motor with a resistor whose resistance value changes in proportion to the rotation angle of the motor, for the valve drive motor. Therefore, the cost of the entire apparatus does not increase.

According to a fourth aspect of the present invention, the valve opening target value is approximately 10
When the value exceeds 0%, the central processing unit generates only the drive signal in the direction of opening the valve from the drive signal generating means. When the target valve opening is less than approximately 0%, the central processing unit controls the valve. Since only the drive signal in the closing direction is generated from the drive signal generation means, even if the error between the logical value of the valve opening and the actual valve opening is within the extended range, the target value of the valve opening is not changed. Once in the extended range and then back in the 0-100% range, errors in the valve opening logic can be corrected in the process and calibration can be performed without affecting the temperature adjustment operation. effective.

According to a fifth aspect of the present invention, at the start of the temperature adjustment operation, the central processing unit generates a drive signal for completely closing or fully opening the valve from the drive signal generating means, and reduces the valve opening degree obtained by the calculation to approximately 0%. Alternatively, since the calibration operation is performed to be set to about 100%, there is an effect that the temperature adjustment operation can be started in a state where the logical value of the valve opening and the actual valve opening are matched.

According to a sixth aspect of the present invention, at the end of the temperature adjustment operation, the central processing unit generates a drive signal for fully closing or fully opening the valve from the drive signal generation means, and reduces the valve opening obtained by the calculation to approximately 0%. Alternatively, since the calibration operation is performed to set the temperature to approximately 100%, there is no need to perform the calibration operation at the next start of the temperature adjustment operation, and the temperature adjustment operation can be started immediately.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a system using an air-conditioning control device according to a first embodiment.

FIG. 2 is a flowchart illustrating the operation of the above.

FIGS. 3A and 3B are diagrams illustrating a calibration operation according to the first embodiment;

FIG. 4 is a flowchart illustrating an operation of the air-conditioning control device according to Embodiment 2.

FIG. 5 is a flowchart illustrating an operation of the air-conditioning control device according to Embodiment 3.

FIGS. 6A and 6B are diagrams illustrating a calibration operation according to the first embodiment.

FIGS. 7A and 7B are diagrams illustrating another calibration operation according to the first embodiment;

FIG. 8 is a flowchart illustrating an operation of the air-conditioning control device according to Embodiment 4.

FIGS. 9A and 9B are diagrams illustrating a calibration operation according to the first embodiment.

FIG. 10 is a schematic configuration diagram of a system using a conventional air-conditioning control device.

FIGS. 11A and 11B are diagrams illustrating a calibration operation according to the first embodiment.

[Explanation of symbols]

 7 Cold water valve 8 Hot water valve 10 Digital output unit 11 CPU 22a Cold water valve drive unit 22a Hot water valve drive unit

Claims (6)

[Claims] An air conditioning control device for controlling the temperature of air by adjusting a valve opening of a valve for supplying cold or hot water to a heat exchange means for performing heat exchange between cold or hot water and air. A driving signal generating means for generating a driving signal for driving a valve driving motor for opening and closing the valve; a temperature detecting means for detecting the temperature of the air; and the valve driving motor fully closing the valve from a fully open state. A data memory that stores the valve travel time required to drive to the state, the control target temperature, and the parameters required for the control calculation, and the sum of the time during which the drive signal generation means generated the drive signal and the valve travel time are used to determine the current valve. Calculate the opening, calculate the valve opening target value of the valve from the temperature detected by the temperature detecting means and the control target temperature, and calculate the difference between the current valve opening and the valve opening target value obtained by the calculation and the valve opening. Drive signal from travel time A central processing unit for calculating the generated drive time and generating a drive signal from the drive signal generating means for the drive time, wherein the central processing is performed when the valve opening target value becomes approximately 0% or approximately 100%. The processing unit generates a drive signal from the drive signal generation unit for a time obtained by adding a predetermined time set in advance to the drive time, and sets the actual valve opening to approximately 0% or approximately 100%. Air conditioning control wherein the obtained current valve opening is set to approximately 0% or approximately 100%, and a calibration operation is performed to match the actual valve opening with the valve opening obtained by calculation. apparatus. 2. If the valve opening target value changes from approximately 0% while the central processing unit performs the calibration operation while the target valve opening value is substantially 0%, the central processing unit performs the calculation. Is set to approximately 0% to return to the normal temperature adjustment operation, and while the valve opening target value is approximately 100% and the central processing unit performs the calibration operation, When the valve opening target value changes from approximately 100%, the central processing unit sets the valve opening calculated by the calculation to approximately 100% and returns to a normal temperature adjustment operation. 1 air conditioning control device. 3. An air conditioner for controlling the temperature of air by adjusting the opening of a valve for supplying cold or hot water to heat exchange means for exchanging heat between cold or hot water and air. A driving signal generating means for generating a driving signal for driving a valve driving motor for opening and closing the valve; a temperature detecting means for detecting the temperature of the air; and the valve driving motor fully closing the valve from a fully open state. A data memory that stores the valve travel time required to drive to the state, the control target temperature, and the parameters required for the control calculation, and the sum of the time during which the drive signal generation means generated the drive signal and the valve travel time are used to determine the current valve. Calculate the opening, calculate the valve opening target value of the valve from the temperature detected by the temperature detecting means and the control target temperature, and calculate the difference between the current valve opening and the valve opening target value obtained by the calculation and the valve opening. Drive signal from travel time A central processing unit for calculating the generated driving time and generating a driving signal from the driving signal generating means for the driving time, wherein the central processing unit sets the lower limit value of the target valve opening value to a value smaller than 0%. Set to
When the upper limit value of the valve opening target value is set to a value larger than 100% and the valve opening target value becomes equal to the lower limit value, the central processing unit generates a drive signal for closing the valve by a drive signal generating means. When the target value of the valve opening is equal to the upper limit value, the central processing unit generates a drive signal in the direction of opening the valve from the drive signal generating means, and obtains the actual valve opening and calculation. An air conditioning control device, which performs a calibration operation for matching a valve opening. 4. When the valve opening target value exceeds approximately 100%,
The central processing unit generates only a drive signal for opening the valve from the drive signal generating means. If the target value of the valve opening is less than approximately 0%, the central processing unit generates only the drive signal for closing the valve. 4. The air-conditioning control device according to claim 3, wherein the control signal is generated from the drive signal generating means. 5. When the temperature adjustment operation is started, the central processing unit generates a drive signal for completely closing or fully opening the valve from the drive signal generating means, and reduces the valve opening obtained by the calculation to approximately 0% or approximately 100%.
5. The air conditioning control device according to claim 1, wherein a calibration operation for setting the percentage is performed. 6. When the temperature adjustment operation is completed, the central processing unit generates a drive signal for completely closing or fully opening the valve from the drive signal generating means, and reduces the valve opening obtained by the calculation to approximately 0% or approximately 100%.
The air-conditioning control device according to claim 1, wherein a calibration operation for setting the percentage is performed.