JPS5960139A - Method for operating air conditioner - Google Patents

Abstract

PURPOSE:To provide the titled method of operating the air conditioner capable of holding the power consumption quantity constantly at a value within the contract demand and further the temperature within respective rooms as low as possible within the set range. CONSTITUTION:A power line 1 from a power source A is connected to a power line 2. To this power line 2, (n) package type air conditioners C1-Cn are connected through switches CB1-CB3. A current transformer 3 and a measuring transformer 4 are provided in the power line 1. Respective output sides of both transformers are connected to a power measuring device 5. The power P consumed which is measured by this power measuring device 5 is inputted to a microcomputer controller 6. To this controller 6, respective temperature detecting signals from temperature detectors RTD1-RTDn are inputted. Further, when the total power consumed exceeds the limited value (the contract demand), the air conditioner is controlled so that an operation to stop the driving of the air conditioner installed at a position where the deviation between the room temperature and the lower limit value of the set temperature is smallest, by the output signal from the controller 6 or to forcibly stop the operation of the air conditioner having a long driving hour or the air condition having a driving hour close to the predetermined driving hour, is repeated by the output signals from the controller until the power consumed becomes less than the limited value.

Description

[Detailed Description of the Invention] The present invention relates to a method of operating a plurality of packaged air conditioners,
In particular, it relates to a method of controlling the operation of each air conditioner within contract power.

In general, in conventional multiple pack-type air conditioners installed in each room of a factory, etc.,
The temperature of each room is controlled by a temperature control device using value control. However, with this type of binary control, almost all air conditioners are often turned on in midsummer, causing the power consumption to exceed the factory's contracted power. Recently, equipment managers have been making rounds and cutting out unnecessary parts, but there is a problem in that there is a large loss in terms of labor savings.

In order to avoid exceeding the above-mentioned contract, demand control may be adopted, and usage for 30 minutes is required.
When the amount of electricity reaches a certain value, the loads are prioritized and all lower ranked loads are forcibly turned off. However, this method was forced to cut items starting from the lowest priority, so it was unreasonable that one item was being cut at room temperature without any intercropping.

The purpose of the present invention is to solve the above-mentioned drawbacks, and to provide a method of operating an air conditioner that can always maintain the power usage within the contracted power state and keep the temperature in each room as low as possible within the set range. It is about providing.

The present invention focuses on the fact that among a plurality of air conditioners, there are air conditioners that are operating near the shutdown condition (room temperature reaches the lower limit of the set temperature), and reduces the overall power consumption. If the current exceeds the limit value (contract power), install the air conditioner in a place where the deviation between the room temperature and the lower limit of the set temperature is the smallest, or stop the operation of the air conditioner, or replace the air conditioner that has been in operation for a long time. Alternatively, by repeating the operation of forcibly stopping the air conditioner near the scheduled operating time until the power consumption falls below the limit value, it is also possible to measure the power consumption immediately after the air conditioner is turned off. In possible equipment, the power consumption 1 (capacity) of each air conditioner is set in advance, and even if the room temperature exceeds the upper limit of the set temperature, the power consumption after operation of the air conditioner exceeds the limit value. If this is expected, stop the operation of the air conditioner in question, and if the power consumption exceeds the limit value, start the operation of the room whose room temperature is closest to the lower limit of the set temperature of the room among the currently operating air conditioners. After turning off the air conditioner, subtract the capacity of the air conditioner that was turned off from the power used, and set the current power usage as the current power usage.By repeating the above operation until the power usage becomes less than the limit value, the above operation can be achieved. Achieve all objectives.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of an embodiment of an operation control device for a plurality of air conditioners to which the air conditioner operating method of the present invention is applied.

Power line 1 from Higenjin is connected to power line 2,
This power line 2 is connected to n batch-type air conditioners C, , Cn.
are each switch CB.

~Connected via CLI. In addition, each paracane type air M'a machine C1~(,1I is installed f' temperature detector 1Mo TD,~IL'l'
D, is provided and -C is. Current transformers 3 and a1 are connected to the eye force line l.
A measuring transformer 4 is provided, and t7. The output side thereof is connected to the power measuring device 5, and the power consumption P measured by the power measuring device 5 is inputted to the control device 11 (comprising a microcomputer or the like) 6.

This control device 6 includes a front 6-pin temperature sensor) tTi) l~R.
T.D.

temperature detection signals are inputted, and furthermore, this control device 11
The output t1 from 6 is manually connected to the switches CB, to CBn, and these switches are turned on and off.

FIG. 2 shows a detailed configuration example of the control device shown in FIG. 1.

A memory 8 is connected to the central processing unit fil (CPU) 7, which stores the set temperature of each room.

In addition, the central processing bag #7 contains the measurement data (power detection value and temperature sensor) tTD, ~R from the power measurement device i15.
Each temperature detection value of TDn is inputted through an analog input acquisition circuit 9, and furthermore, this central processing unit 7 sends out important signals for the switches CB, ~CB, through the entire digital output circuit 10. do.

Next, the operation of the control device 6 of this embodiment will be explained. Now, if there is enough power P to use, the air conditioners C9 to C, stored in the memory 8 are installed T,, TL.
and the room temperature T detected by the temperature detector 1), TD, ~)(i' D ,
is the lower limit value Tr, ' A cut signal is output to the air conditioner that has turned below the IC to stop its operation, and the room temperature T becomes the upper limit temperature T.
If the air conditioner exceeds H, a large signal is output to start operation of that air conditioner. However, as shown in FIG. 4, when the power consumption P detected by the power measuring device 5 enters the gravity limit over region B where the power consumption P detected by the power measuring device 5 exceeds the limit value (contract power failure) Pyr, the control device 1 to 6 detects the temperature detector 1tTD+. ~Bon 1 “D”
The current room SAT detected by 7 and the temperature's second limit value T l
(deviation ΔTH from
Find L, and find that ΔTu is positive, that is, lower than the 1st limit temperature, and that ΔT+J' is positive and large. 1. selects the air conditioner with the smallest value, and sends a cut signal to it to forcibly stop the operation of the air conditioner.

(Figure 6 shows the operation of the CPU 7 of the control device 6 shown in Figure 2)
"J-chart diagram. In step 101, i is set to 1, and in step 102, the i-th temperature sensor RT l)
Read the detected indoor temperature T1 of I. In step 103, it is determined whether the water temperature T1 is greater than the temperature lower limit value TL+ of the room, and if it is less than the lower limit value TL1, the process proceeds to step 104 and the operation of the air conditioner C (117) is stopped. If room temperature No. 111 is larger than the lower limit Tt, +, in step 105, the value w i -) is changed to 1/, and it is determined whether i is larger than the final device number n, and if it is smaller, Return to step 102.

If it is larger, the process goes to step 106 and reads the detected power P of the power measuring device 5. Next, it is determined whether the 'power P read in step 107 exceeds the limit value PHt (
7. If it does not exceed, set i gold 1 in step 108,
At step 109, the detected temperature TI of the temperature detector RTD+
It is determined whether or not the temperature exceeds the set temperature upper limit value T)II of the room, and if it does not, the air conditioner C+ is fully charged in step 110 and its operation is started. After that, the process goes to step 111 and the detected value P' of the power measuring device 5 is read.

Next, in step 112, it is determined whether P exceeds the limit value PH, and if it does not, step 11
3, enters i I/C1-1-1, determines whether i is greater than the final device number n, and returns to step 109 if it is smaller. Further, if i is larger than n, the operation ends here. Incidentally, if the room temperature T1 is smaller than the upper limit value TL of the room in step 109, step 1 is immediately performed.
If the detection value P of the power measuring device 5 is larger than the limit value PH in step 112, the process goes to step 114. Furthermore, if the value of P is larger than PH in step 107, the process goes to step 114.

Next, we will explain the process when the usage power P is greater than the contracted power amount (limit value). First, in step 114, the temperature of the room where the first air conditioner c1 is installed is determined as the maximum value of the deviation. Temporarily enter the difference between the upper and lower limit values in the work memo IJ'WK.In this case, you may enter a large number of feet in WK.Also, set i to 1 and j to 0.Next, in step 115, the temperature is After reading the detected room temperature T+'jz of the detector RTD+, it is determined in step 116 whether this TI is larger or smaller than the set temperature upper limit value 1゛ for this room, and if it is smaller, the process goes to step 117 and if it is larger. Step 120
go to. In step 117, TI is then set to the set temperature lower limit T.
It is determined whether it is larger than LI or not, and if it is larger, go to step 118, and if smaller, step 120Vc line <. At step 118, the deviation between T1 and TLI is determined, and it is determined whether this deviation is larger than the value of the work memo IJWK. If it is larger, the process is entered in step 12C); if it is smaller, the process goes to step 119. This step 11
9, the deviation between the TI and Tr,1 is stored in the work memory WK.
and enter the value of j IICi. Next step 1
20, the value of i is i+1, and the summer value is the final device number n.
So 1 white.

If it is smaller, the process goes to step 115; if it is larger, the process goes to step 121.

In this step 121, it is determined whether J is 0 or not. If it is not 0, in step 122, the air conditioner C
4 and complete control. If j is 0, step 1
At step 23, the set temperature of the room temperature is raised and the control is ended. In other words, the operation in step 121 is 0, which means that there is no air conditioner that is close to the lower limit of the set temperature of the room, and the set temperature of the room must be raised. If there is a certain value from 1 to n, it means that the air conditioner cj with the corresponding number is closest to the set lower limit temperature and the room is cold, so turn off this air conditioner, This means that the power consumption can be reduced.

FIG. 7 shows an operation flowchart of the control device ft6 when raising the temperature set value described in FIG. 6.

First, in step 201 it is determined whether the set temperature has been raised, and if it has been raised, an alarm is issued in step 202 and the operation is terminated. If it has not been raised yet, in step 203 the difference between the current vehicle power P and the limit value PH is multiplied by a constant K and this value is entered in the work memo IJWK. Also, put 1 in i. Next, in step 204, the initial set temperature upper limit value 1 of each room is stored in a separate area of the old set temperature lower limit value TL+the set temperature lower limit value TL+all memory 8. Next step 205
At , the value of WK is added to the current room temperature upper limit value TI to obtain a new set upper limit value TI, and the value of WK is added to the current set room temperature lower limit value TI,1 to set a new room temperature lower limit value Tt,l. Next, in step 206, i+1 is entered, and it is determined whether i is larger or smaller than the final device number n. If it is smaller, the process returns to step 204, and if it is larger, the set temperature is determined to have been raised in step 207. Control is then terminated.

Similarly, in step 204, the initial set temperature upper and lower limits (f
fjT+t+ and'rT7. The purpose of storing the -F limit value in another area of the memory 8 is to return the -F limit value to its original value when the power consumption P returns to below the limit value PH, above the room temperature. Same, step 205 at room temperature.

Even if the lower limit value is raised, if the used force P is less than the limit value, a static shaft is taken out and the process is handled at the discretion of the person. Of course, step 123 in FIG. 6 may be used as a mere alarm, and the rest may be operated based on human judgment.

According to this embodiment, when the current power usage P detected by the power measuring device 5 exceeds the limit value PH', n air conditioners C
,,Co, the temperature '1'I of the room being nitrogen-controlled is between the temperature upper limit value 1'old and the lower limit value Tr, + of that room, and (T + - T+ , +) until the power consumption P becomes equal to or less than the limit value PH.
By adopting an operating method that shuts down the air conditioner in the coldest room first, the temperature in each room is kept as low as possible, and power usage is always kept within the limit value (contracted power amount). effective. In addition, if there is no air conditioner that meets the stop conditions, by raising the upper and lower temperature limits of each room, we will search for air conditioners that satisfy the stop conditions and start the operation of the relevant air conditioner. By omitting the stop,
This has the effect of keeping the used power P'Th below the limit value PH.

Furthermore, since the entire series of operations described above is performed automatically by the control device 6,
This eliminates the need for people to walk around turning off the air conditioner, which saves labor, and also reduces comfort by turning off the air conditioner in the coldest room first. This has the effect of keeping things to a minimum.

FIG. 8 shows an example of the configuration of a control device to which another embodiment of the air conditioner operating method of the present invention is applied. A memory 8 is connected to the central processing unit 7, in which the currently used power P from a power measuring device (not shown) is input to the central processing unit 7 via an analog input circuit 9. Further, the central processing unit 7 sends opening/closing commands to the switches CB, to CBl, which turn on and off the supply of power to each air conditioner, through the digital output circuit 10. Up to this point, there is no difference from the previous embodiment shown in FIG. 2, but the feature of this embodiment is that the timer memory 11 and the important storage memory 2 are connected to the central processing unit 7.

In addition, the control device, power measurement device, and switches CBI to CB,
Since the connection relationships between the air conditioners C1 to C% are substantially the same as those in the previous embodiment shown in FIG. 1, illustration thereof is omitted, but no temperature detector is installed in this embodiment.

FIG. 9 shows the principle of the temperature control method of this embodiment, in which each air conditioner is operated at a power of 5,
Cut time 1. The operation is stopped during this period, and repeating this process keeps the room temperature within the set range. Here, Ail reporter time IN and OFF time 1. is preset in the memory 8, and the timer 1 measures the time when the air conditioner is turned on or turned off, and notifies the central processing unit 7 of the time. The on/off storage memory 12 also stores on/off commands issued by the central processing unit 7 via the digital output circuit 10 to the air conditioners CB, -CB, l.

Similarly, the lengths of the above-mentioned entry time tN and off time 1F are determined by the size of the room and the capacity of the air conditioner, so they are determined in advance by actual operation. In controlling the importance of the air conditioner for a predetermined period of time, it is used as shown in Figure 10.
When the electric power P exceeds the limit value PR, it becomes necessary to stop some of the air conditioners. Figure 11 shows the power consumption l) in ft.
Which air conditioner is strongly flil when the 1l limit value PH is exceeded?
As an example of how to decide whether to stop all of the air conditioners at once, among the air conditioners C2 to C, which are in operation, stop the one with the smallest difference Δt between the start time tM and the operating time t up to the present moment. Target machine.

FIG. 12 shows operation 7 performed by the central processing unit 7 in 11 cases of dishonesty.
0-char i is shown. In step 301, it is determined whether the air conditioner C' is a person or not, and in step 302, it is determined whether the air conditioner C' is a person or not, and if it is not a person, the process goes to step 303.

In step 303, the operating time of the air conditioner at the current moment 1 is 1.
is set as tl+1, the operating time of the air conditioner at the i-10th point is set as tl, and in step 304, this 1. Determine whether il) is larger or smaller than the air conditioner turn-on time t) Jl, and if it is smaller, go to step 307; Stop driving. Next, in step 306, "IVCO'j:
In step 307, set 1f6:r -1-1, and determine the magnitude of i with respect to the final device number n. If it is small, return to step 302, and if it is a dog,
In step 308, i@) is set to 1. Next step 3
In step 09, it is determined whether or not the air conditioner C1 is turned off. If it is not turned off, the process goes to step 315, and if it is turned off, the process goes to step 3.
1l-1,1' for 10! i='+, step 3
11, the operating time of this i-th air conditioner at the current time is 1.
The magnitude of the off time tFI of the i-th air conditioner is determined, and if the current operating time t1 is small, step 315 is performed.
If the size is large, go to step 312 and install the air conditioner C.
Turn on I and start driving. Next, in step 313, t,
In step 314, the current power consumption P is compared with the limit value Pa, and the power P for one employee is the limit value PH.
If it exceeds the limit, the process goes to step 316; if it does not, the process goes to step 315. In step 315, i I/Ci +1 is input, and i is compared with the final device number n. If i is small, the process proceeds to step 309, and if i is large, the operation is ended. Step 316
Now, the turn-on time lN1k of the first air conditioner C3 is temporarily stored in the work memo IJWK, and i is set to 1 and J is set to 0. Next, in step 317, it is determined whether the air conditioner CI is in operation,
If the vehicle is not in operation, the process goes to step 320. If it is in operation, the i-th air conditioner turn-on time tN is determined in step 318.
l and the first air conditioner's operating status up to this point.

The deviation from WK is calculated, and this deviation is compared with the value of WK. If the deviation is larger than WK, the process goes to step 320, and if it is smaller, the process goes to step 319. In this step 319, the deviation kWK of 1 degree from the tNl is temporarily stored and set as the value of Jff,i.

Next, in step 320, 1ffii+1 is set and all comparisons are made with the final device number n which is 1. If i is small, the process goes to step 317, and if i is large, step 31
2, it is determined whether j is 0 or has a certain value, and if it is 0, the operation is terminated. If it is not 0, the process goes to step 322, where the third air conditioner Cj is turned off to stop its operation, and in step 323, the control operation is ended with the current operating time tj'eo of the air conditioner cj being set.

According to this embodiment, when the used power P exceeds the limit value P+rk, the one with the longest operating time tI up to the present moment for each on-time 'nl is selected among the air conditioners 01 to Ci. And this driving time 1. By stopping the operation in order from the longest one until the power usage P falls below the limit value PH, the temperature in each room is kept as uniform and low as possible, and the power usage Pt - limit value PR is always maintained. This embodiment has the following effects, and other effects are similar to those of the previous embodiment.

Next, another embodiment of the present invention will be described. This embodiment shows a method of operating an air conditioner in a case where the current power consumption 1 of the air conditioner cannot be directly measured. The control device of this embodiment, air conditioners C,, Cn, switches CB, ~
The wiring relationship between CBfi and temperature detector I (TD, -1 (TD) is completely the same as shown in Figure 1 except that the power measuring device is an integrating wattmeter, so illustration is omitted. However, since this embodiment uses an integrating power meter,
It is not possible to directly measure the current power consumption Pt of the air conditioner CI-C. Therefore, the control device of this embodiment is the 13th
It has a configuration as shown in the figure, and calculates the current power consumption P from the average power indicated by the integrated wattmeter, and controls the air conditioner based on this. That is, CPU7
Memories 8A and 8B are connected to the memo 1J8A, the set temperature lower limit value TH and the set temperature lower limit value 1'L are stored, and the memory 8B stores the capacity Pc of each air conditioner. By the way, the power meter, which is a transaction meter of the electric power company, shows that every fixed amount of usage (for example, 10 KWh)
H is output, and this WH is fetched into the central processing unit 7 via the pulse input fetching circuit 13. Further, the detected values of the temperature detectors RTD, -RTDn provided in each room are inputted into the central processing unit 7 via the analog input inputting circuit 9. Further, important commands from the central processing unit 7 are outputted to switches Cf3, ~CB, via the digital input/output circuit 10, and turn on/off power to the air conditioners C1~C, .

In the control device of this embodiment, the temperature of each room is set to the temperature upper limit T H
If the temperature exceeds Tt, the air conditioner in that room is turned on and starts operating, and if the temperature in that room falls below the lower temperature limit Tt, the air conditioner is turned off and stopped. Control is performed to maintain the entire temperature within a predetermined range. However, air conditioners C and -C.

If the power P used by exceeds the limit value PHIr,
The air conditioner is forcibly turned off and used'...: The power P' is set to the limit value P.
Must be within 11.

FIG. 14 is an explanatory diagram showing a method of calculating the current average power usage from the pulses of the integrated wattmeter.

Normally, the pulses from an integrated wattmeter are 5 to 10 pulses/minute, so calculating the average power usage from the value for 1 minute will have a large error, so the number of pulses ΔWH for 5 minutes is counted.
' to be multiplied by 12 to calculate the average power usage per hour.

Therefore, as shown in FIG. 15, the power consumption P is an average value for each minute. In other words, even if you take good care of the air conditioners C1~c,,', the above f* calculation power meter cannot immediately measure the results, and as the temperature rises and the number of air conditioners in operation increases, , power limits ffFr, Puk are often exceeded. Therefore, in this embodiment, an integrating wattmeter as described in 2 is used, and even in the case, the air conditioner is operated in such a way that the power used P does not exceed the total PH of the air conditioner. However, for this purpose, 14 machines cl to C on each wall
A major feature of this embodiment is that the capacity @Pc + ('rb, force) of , is stored in the memo IJ 8 B V ('rb, force) shown in FIG.

FIG. 16t is an operation flowchart of the control device of this embodiment. In step 301, the pulse input from the scale (calculator) is taken in, and in step 3o2, the power consumption P is calculated (
7, and find the deviation ΔP between this used power (average) P and the full power limit Pn. Next, in step 303, i
Enter 1 in , and in step 304, enter the current temperature of the famous family! iT+
I swallowed it. Next, in step 305, the current room temperature T1 is compared with the temperature lower limit value TL+ of this room, and if TI is large, V
Go to step 308, and if 1''I is small, go to step 306, turn off the air conditioner C+ in this room and stop operation.Next, in step 307, change the deviation ΔP calculated in step 302 to Add the capacity PCr of the air conditioner C1 that was turned off, and define this as the new deviation ΔP. Next, go to step 308, set i + l to random i, and compare i with the final device number n. If i is smaller than n, return to step 304, and if i is larger than n, step Go to 309. In this step 309, ΔP
Determine whether is positive or negative, and if it is positive, that is, if the power consumption P has not yet exceeded the limit value Pn, go to ■; if it is negative, that is, If the power consumption P exceeds the limit value Plt, the process proceeds to step (2).

In the process of (2), first, in step 310, the work memo 1J is
Enter WKKOk and set "el. Next, in step 311, the current room temperature T of the room where the i-th air conditioner is installed,
Load. Next, in step 312, the room temperature T+ is compared with the set temperature -hi limit value Told for this room, and if TI is smaller than TI, the process goes to step 318, and if it is larger, step 3
Go to 13th. In step 313, PC+f, which is the capacity of the 11i-th air conditioner, is subtracted from the deviation ΔP, and it is determined whether this value is negative or positive. If it is negative, the process goes to step 315, and the work memory WK is PC from value.

Store the new value subtracted in the work memo IJWK,
Go to step 318. If it is determined to be positive in step 313, the process goes to step 316, where the air conditioner C+ is fully charged and operated. Next, in step 317, from ΔP to PC+
The value obtained by subtracting e is set as the new ΔP. Then step 318
Let 1-4-1 be a new i, and i,! -Compare with the final device number n, and if i is smaller than n, return to step 311; if i is larger than n, d] Step 3
Step 19, check whether WK is 0 or exists (rIIk), and if it is 0, terminate the operation. If it is not 0, check the value of this WK in step 320. ΔP and (7) and go to process 0.

Process 0 will be briefly explained. First, in step 321, put 1 (f-) into i. Next, in step 322, set the first
Set temperature upper limit value T[H of the th air conditioner.

Find the difference between and the set temperature lower limit T+, 1, store this in all work memories WK, and set it as ky□ with Jf:1.

In step 323, the room temperature TIk of the room where the air conditioner of J cuff is installed is read, and in step 324, T.

and ilM In-j-limit 1ib' of this chamber, T H
Compare the size with +.

If TJ is greater than TI, go to step 328;
If it is smaller, go to step 325. Step 325
Then, the room temperature T is compared with the lower limit temperature Tt,j of the room. If rllj is smaller than TLI, the process goes to step 328, and if it is larger, the process goes to step 326.

In step 326, the deviation obtained by subtracting 3 'Jr from T is compared with WK, and if the deviation is larger than WK, the process goes to step 328, and if it is smaller, the process goes to step 327. In step 327, the deviation r between Tj and TLj is entered in the working memo IJWK, and the value of j is set to (-). If it is smaller than n, the process returns to step 323, and if it is larger, the process proceeds to step 329.In step 329, it is determined whether the value of t and k is 0 or not, and if it is 0, Finish the operation,
If it is not 0, go to step 330. step 330
Then, the air conditioner Ck is turned off to stop this operation, and then in step 331, the capacity P of the air conditioner Ck with the deviation ΔpVck is set.
. , and use this as a new deviation ΔP. Next, in step 332, is ΔP positive?)! 1 or complete full cut, if positive, end control 1jlJ operation, negative 1 go + 4t nutep 3
33, and here 1±1 bean k"lJ [tana i,
In addition, if the life ratio axis between i and the device's last stab number n is smaller than i, step 3221/([If l is greater than n, t goes to step 334 and issues an M alarm, and then Side @if 1j) Finish one work.

Step 301 or restep 308 is normal empty W141
14 (';' + In the process, if the temperature is higher than the setting 1, the corresponding air conditioning unit is stopped. At this time, the capacity of the air conditioner turned off in step 307 is By adding to (power) Pc+'iΔ[], we can always accurately grasp the deviation between the power limit (ii'j, T o and the power used P of the current power P. Step 3) 0 to Step 3
20 is a process when the temperature is 1\':l< and the condition for turning on the 42 air conditioner is satisfied.If the condition for turning on the air conditioner is satisfied, in step 313, ΔP is subtracted from the capacity PcIkAP of the air conditioner. After checking whether the situation is expected to be positive even after turning on the corresponding observation device, the corresponding air conditioner is operated in step 316, and then in step 317, the capacity Pc+ of the corresponding air conditioner is changed from ΔP. By subtracting the value, always grasp the current Δ1. Steps 321 to 334 are processes when the deviation ΔP becomes negative and the power used P exceeds the limit value PM. In this case, too, after the air conditioner is forcibly turned off, the air conditioner turned off in step 331 The process from step 322 to step 331 is repeated until ΔP becomes positive, that is, until the power consumption P becomes equal to or less than the limit value PH.

Similarly, even if all the air conditioners are forcibly turned off, Δ
When P is negative, a warning is issued in step 334 to prompt manual processing.

According to this embodiment, when turning on an air conditioner, the capacity Pck of the air conditioner is determined from the deviation ΔP between the limit value PR and the power used P.
Then predict whether the power used P will exceed the limit value PH, turn on the air conditioner only if it does not exceed it, and if it does, immediately subtract the capacity Pc+ of the air conditioner from ΔP, Ascertain the exact value of ΔP at the current moment, and if the power consumption P completely exceeds the limit value PH, immediately add the capacity Pckk of the relevant air conditioner to ΔP as soon as the air conditioner for which the off condition has been met is turned off. Then, by grasping the current deviation ΔP' and turning off the air conditioners whose cut-off conditions are met sequentially until this ΔP becomes positive, the integrated power is Even if it is not possible to measure the entire amount of power used at the current time using a meter, the deviation ΔP' between the current power usage P and the limit value PH is always accurate.
It is possible to operate the air conditioner with this information in mind, which has the effect of significantly reducing the chances of the power consumption exceeding the contracted power. Other effects are similar to those of the previous embodiment.

As described above, according to the air conditioner operating method of the present invention,
It is possible to automatically maintain the amount of power used within the contracted power at all times, and the temperature of each room can be maintained as low as possible within the set range.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an example of the wiring configuration of an air conditioner to which an embodiment of the air conditioner operating method of the present invention is applied, and FIG.
Detailed block diagram of the control device shown in the figure, Figure 3 is a diagram of changes in room temperature over time, Figure 4 is a diagram of changes in power usage over time, and Figure 5 is a diagram showing candidates for air conditioners to be forcibly turned off. 6M is an operation flowchart of the control device shown in FIG. 1, FIG. 7 is an operation flowchart of the control device shown in FIG. 1 when raising the set temperature, and FIG. A block diagram showing a detailed example of a control device for an air conditioner to which another embodiment of the invention is applied, and FIG. 9 is a line showing changes in room temperature over time and important states of the air conditioner in another embodiment of the invention. Figure, 10th
Fig. 11 is a diagram showing the change over time in the amount of electricity used in another embodiment of the present invention, and Fig. 11 is an explanation showing a method of selecting an air conditioner to be forcibly turned off in another embodiment of the present invention. 12 is an operation flowchart of a control device according to another embodiment of the present invention. FIG. 13 is a block diagram showing a complete detailed example of a control device for an air conditioner to which still another embodiment of the present invention is applied. Fig. 14 is a diagram showing the principle of calculating the average power from the integration '+T and 1 force meter according to still another embodiment of the present invention, and Fig. 15 is a diagram showing the 'limitation of power' according to still another embodiment of the present invention. FIG. 16 is a diagram showing the deviation between the value and the power used, and is an operation flowchart of a control device according to still another embodiment of the present invention. 5... Power measurement device, 6... Control device, 7... Central processing unit, 8.8A, 813... Memory, 9...
Analog input acquisition circuit, 10... digital output circuit,
DESCRIPTION OF SYMBOLS 11...Memory for timer, 12...Important memory, 13...Pulse input acquisition circuit, C1-C0...Air conditioner, CB. ~CB I...Switch, RTDt~l ('1'D,...
・Temperature detector. Taku 1 Mouth Figure 2 → Time - 〇 Misaki Mo Figure 5 → Mouth W Figure 6 1 - Funeral Figure f12, 8 Figure 9 → Kakuma Tsuji 10 Figure Fan/1 Figure n5 '7/1t-(2 ) Figure 15 m - Exposure 160 No. 76 [Figure no (Tsubuki) Procedural amendment (method) % formula % Commissioner of the Patent Office Kazuo Wakasugi 114 case Display Showa 5th Fi I-1 "I'it'l petition" No. 168520
The master of the No. 1 invention, the person who corrects the operating method of air conditioners! i+'lTonolV,l(f: flI'to'lApplicant fII'Tokyo 111-ku Marunouchi-I'
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Sui representative name 3 January Katsu Shigeyo Osamu Hitoshi 11i Marunouchi-jto 1, Choyo III-ku, Tokyo
5 Liver], U Stock Co., Ltd. 411117: Manufacturing 11 11
Episode 2 East...I', 1fi-1221l (non-paid) sleeve
A detailed description of the invention in the specification, a brief description of the drawing in the specification, and Figure 16 of the drawing. Correction/correction details 1, light 11B*231itig line 6t))rm16
16(a) to (C) are corrected to ``Figure 16 (a) to (C)''. 2 Details: 1 Correct "Fig. 16" in line 20 of shell 30 to "Fig. 16 (a) to (C)". 3. Figure 16 of the drawing is corrected to the drawing attached to the written amendment. Figure 16 (0) Figure 16 (b) Figure 16 (C)

Claims (1)

[Claims] 1. Usage: By using multiple air conditioners connected to a common power line with limited power, the room temperature of each room where each air conditioner is installed can be adjusted individually for each room. In an air conditioner operation method in which each air conditioner is turned on and off to maintain the room temperature between the upper limit and lower limit, if the power consumption exceeds the limit for the whole building, the , turn off the air conditioner installed in the room where the room temperature is closest to the room temperature lower limit, and if the power usage needle still exceeds the limit value, turn off the air conditioner installed in the room where the room temperature is closest to the room temperature lower limit. A method for operating an air conditioner, characterized by turning off the air conditioner installed in the closest room, and repeating all of the above operations until the operating force falls below a limit value. 2. If the power consumption exceeds the limit value, and if there is no air conditioner in operation that satisfies the above cutoff conditions, the lower limit value will be raised at a predetermined rate based on the room temperature of each room. A method of operating an air conditioner according to claim 1, characterized in that: 3. The method of operating an air conditioner according to claim 2, which is characterized in that if the power consumption still exceeds the limit even after raising the upper and lower limits of the room temperature, an alarm is issued. . 4. In the method of operating an air conditioner in paragraph 1, the difference between the operating time and the on time from the start of operation to the present is the smallest among the air conditioners currently in operation, and even if the air conditioner is completely turned off, the power consumption is still low. If the limit value is set throughout the building, turn off the air conditioner that has the smallest difference between the current operating time and the entry time among the currently operating air conditioners, so that the power consumption is below the full limit value. A method for operating an air conditioner, characterized by repeating the above operations until the operation is completed. 5. In the method of operating an air conditioner in paragraph 1, the equipment is equipped with equipment that makes it impossible to directly measure the current power usage and only obtains the average power usage, and is connected to a common power line that has a limit on the power usage. Each air conditioner is configured to maintain the room temperature of each room in which each air conditioner is installed between the upper and lower limits set individually for each room. In the method of operating an air conditioner that turns on and off, first, the current average power consumption is regarded as the current power consumption, and if the air conditioner is installed in a room where the room temperature exceeds the upper limit of room temperature, the corresponding Before turning on the air conditioner, calculate the expected power usage by adding the capacity of the air conditioner to the current power usage, and decide to turn on the air conditioner only when this expected power usage does not exceed the limit. The above estimated power usage is taken as the current power usage, and after turning off the air conditioner in a room where the room temperature is one full range below the room temperature lower limit, the value obtained by subtracting the capacity i: of the air conditioner that was turned off from the power usage before turning it off is the current value. A method of operating air conditioners that takes care of each air conditioner's power consumption. 6. In the operating method described in Section 5, First of all, the current average power consumption is considered as the current power consumption, and if the power consumption exceeds the limit value, the room temperature in the currently operating air conditioner is The air conditioner installed in the room closest to the lower limit of room temperature is completely turned off. After the air conditioner is turned off, the current power usage is calculated by subtracting the capacity of the air conditioner from the power used before turning it off. If the power still exceeds the limit, turn off the air conditioner installed in the room whose room temperature is closest to the lower limit among the currently operating air conditioners, and after turning it off, restart the air conditioner that was used before it was turned off. 'The current power usage is taken as the value obtained by reducing the capacity of the air conditioner that has been cut off from the power supply (7). Operating method. 7. If the power consumption exceeds the limit value, and if there is no air conditioner in operation that satisfies the above cut-off conditions, the lower limit value will be raised at a predetermined rate. The method of operating an air conditioner according to claim 6. 8. The method of operating an air conditioner according to claim 7, wherein the air conditioner produces good news.