JPS58156142A - Terminal equipment controlling unit with calorie demand controlling function - Google Patents

Abstract

PURPOSE:To effect control smoothly and quickly without producing general incontrollable state, by dispersing the judging and controlling functions to terminal equipment controllers. CONSTITUTION:A main controller MCT connected with a terminal apparatus TE including a keyboard, etc. is connected via subcontrollers SCT1-SCTm to the terminal controllers TCT11-TCT1n...TCTm1-TCTmn to sent and receive data. The terminal controllers TCT11-TCTmn calculate the calorie of the heating medium from the temperature and flow rate of the heating medium detected by a temperature sensor T and a flow rate sensor F and compare it with an aimed value, and when the calculated value is higher then the amied value, the opening of an electromagnetic valve MV is decreased to decreases the flow rate of the heating medium.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a terminal controller used in an air conditioning control device for a building or the like.

Conventional air conditioning control equipment consists of a central control unit using a computer and local converters distributed throughout the premises, and the central control unit performs judgment processing based on data from each local converter. The results are sent to local converters to control each part of the air conditioning equipment, and control decisions are made all at once in the central control unit, so if the central control unit fails, all air conditioning equipment cannot be controlled. It had the drawback that it was impossible.

Also, connect the central control unit and each local converter with separate wiring! i! - Because they are connected or connected by multiple busbars, the amount of wiring is extremely large, the required wire material cost and wiring man-hour cost are high, and it is not easy to change the configuration by adding a local converter. Moreover, it also has the disadvantage that it is not possible to freely combine the appropriate combinations due to the device configuration. In the past, all decisions were made in the central control unit, so a lot of information processing was required for processing. The present invention has the purpose of fundamentally solving these drawbacks of the conventional technology, such as requiring a large amount of operating time and not being able to perform various controls smoothly and quickly. By distributing judgment and control functions to terminal controllers that transmit and receive data and locally control each type of air conditioner, it is possible to prevent general uncontrollable conditions and to perform control smoothly and quickly. The present invention provides an extremely effective terminal controller with a heat demand control function.

Hereinafter, the present invention will be explained in detail with reference to figures showing examples.

Figure 1 is a block diagram of the entire configuration 69. Terminal equipment TE such as a keyboard and cathode ray tube display device are connected to the main controller MCT, and by transmitting and receiving data with these, data can be input by the operator and data sent to the operator. While the output of the main controller MCT is freely controlled, the output of the main controller MCT is
Connected to sub-controllers 5CTI to SCTm from aK,
It transmits predetermined data thereto and receives data from each of the sub-controllers 5CT1 to SCTm.

In addition, each of the sub-controllers SCT* to SCTm is connected to each of the plurality of terminal controllers TC by each transmission path Lbt to Lbm.
T11~TCT1nSTCTzt~TCrxn%T
It is connected to CTm1 to TCTaan and relays data transmission and reception between these and the main controller MCT as necessary, and each terminal controller TCTst to TCTmn
-1 is connected with a temperature sensor T1 as a local sensor, a humidity sensor H1, a status contact of a fan motor FM, etc., and a motor control valve MV, an electromagnetic switch MS, etc. for controlling each wing receiver vI4ia, etc. are connected to each terminal controller TCT■ to TCTmn#'i and sub-controllers 5CTt to SCTm, and make control decisions based on the status of each detection output of each sensor T1H and the status contact of the fan motor FM. By performing this and sending control outputs to the motor valve M2, electromagnetic switch MS, etc., each type of air conditioner can be locally controlled.

Next, the terminal control T CT m n is a temperature sensor installed near the heat source of the refrigerating machine, and measures the temperature and flow rate of the heat medium such as hot water, steam, and cold water supplied from these to each control device. Figure 2 is a block diagram of the main controller MCT.
PUmt - central, fixed memory ROMm, variable memory RAMm, transmission circuit TRXm and interface I
Fmt is well arranged, and these are connected by a mother *BUSm, and the processor CPUm executes the instructions stored in the fixed memory 9ROMm in advance, and transmits and receives data and interfaces with the 1iii controller SSCTl-8CT via the transmission circuit TRXm. Terminal iT via IFm
Data sent and received with E is stored in variable memory RAM as needed.
m.

FIG. 3 is a block diagram of the sub-controller 5CTs=SCTm. Similar to the p1 king controller MCT, the processor CPUa
't-centered, fixed memory ROMm, variable memory RA
Ma and the transmission circuits TRXII and TRX5t are arranged around the f, and these are connected to each other by the bus line BUSs, and based on the instructions stored in the fixed memory ROM island, the main controller MCT and the transmission circuit TRX1 and TRX5 are connected to each other via the transmission circuits TRX1 and TRX5. Data transmission and reception between each terminal controller TCTII to TCTmm is relayed while accessing the variable memory RAM 5 for necessary data.

FIG. 4 shows the terminal controllers TCTo to TCTmn,
Similarly to the main controller MCT, this also has a processor CPUtt as a control unit, and a fixed memory RO.
A programmable read-only memory (Proframab
A write memory FROM is provided using a write memory FROM, and a writer for writing data thereto is connected to the bus line B via a write circuit JWRT.
It is connected to USt, and the write memory FRO is connected via this.
Data is accessed to M, and once written, the data is retained forever until it is erased by ultraviolet irradiation or other means.

A large-capacity capacitor CPg is connected to the variable memory RAMtKU and the power supply +vlI11, so that even if the main power supply fails, the data stored in the variable memory RAMt will not be lost for about 48 hours. - so,
The same applies if a battery is used instead of the capacitor Cr.

Note that the processor CPUt executes the next instruction stored in the fixed memory ROM t, transmits and receives data to and from the sub-controllers SSCTl-8CT via the transmission circuit TRXtt, and
Interface IFtlt - Receipt of digital data input DI, analog data input AI from valley sensor and status wide point via interface, and digital data output DO, analog data output A for each control # enthroning
Sends the required data to the variable memory RA.
I am accessing Mt, but the important data is written by Writer W.
The data is fixedly stored in the write memory lJPROM via RT, and the processor CPUt makes control decisions according to the detection output of each sensor and each data DI, AI, and transmission/reception data indicating the status of the status contact. Moreover, each data output Do, AO is sent out as a control output. The processor PST is connected as necessary, and the 19 processor CPUt responds to its operation, and the variable memo! The contents of the JRAMt and the write memory PROM can be displayed, and data can be updated or new stored therein freely.

Then, the terminal controller T CT m n calculates the amount of heat of the heat medium based on the data from the temperature sensor T and the flow rate sensor F, and calculates the amount of heat of the heat medium based on the data from the temperature sensor T and the flow rate sensor F.
Based on the comparison with the value iii, the control level that determines the reduction amount of the heating medium supply valve in each air conditioner is determined for each hot water, steam, and cold water, and these are sent as data to the King's Pottery MCT K. 0 Figure 5 shows the terminal controller TCTII! 1 processor CP
This is a flowchart showing the control operation by Ut, in which after turning on the power or recovering from a power failure, initialization is performed to set the initial state, and test data is accessed to the variable memory RAM tflc. Judging whether the access to the variable memory RAMtK is normal or not, judging whether the data of the variable memory RAMtK setting value is stored, and determining whether the total number of bits of data stored in the 10 variable memories when recovering from a power outage is the same as before the power outage. To determine whether they are the same or not, perform a self-diagnosis, and if there is an abnormality? # (If DYES, perform 1 abnormality countermeasure processing such as transferring the contents of the write memory FROM and newly storing it in the variable memory RAMt, and then transmit and receive 1 data *'
As a result, the main controller MCT ``1~μ rebirth is notified via the sub-controllers 8CT1~SCTm, and the royal pottery MC
Receives the necessary data from T and stores it in the variable memory 9RAMt.

There is a turtle abnormality! If l is NO, digital data input %DI is taken in and analog input 1AI*in' is performed according to the data from temperature sensor T and flow rate sensor F, and after storing these in the variable memory RAMt, the actual measurement is performed. The measured value is compared with the target value, and depending on which of the target values the measured value is larger, a control level is determined to determine the reduction opening degree of the heat source supply valve in each V4 machine.

Next, the presence or absence of the setter PBT is determined by t-%PST check I, and 'PST exists III is N.

If so, immediately move to turtle data transmission/reception I, but depending on the IC, one-to-P communication such as sending data to the setting device PST and storing data from the setting device PST, etc.
After performing the ST processing It-, data transmission/reception l is performed, necessary current data is transmitted, and the received data is stored in the variable memory RAMt, and the above operations are repeated.

Figure 6 is a 9-yard approach showing the control operation by the processor CPUt of the terminal controller TCT port to TCTm+a-s, and the self-diagnosis is the same as in Figure 5.
# judgment, 'DI import', Kamemu l import I, etc., and the Sagi time schedule control 11 which allows the power to be turned on to air conditioners only in a predetermined 9-hour period 11 Actual measurement of room temperature, etc. Compares the value with predetermined upper and lower limit values, and sends out data that indicates a color alarm when the actual measured value is greater than the upper limit and less than the lower limit.1
After upper and lower limit monitoring l is performed, 1 adjustment control # is performed to set the opening of each heat source supply valve such as a hot water valve, a steam valve, a cold water valve, etc. in the air conditioning equipment by a predetermined calculation corresponding to the input data.

9. Next, perform the control 1-f described later, determine the final opening degree of the heat source supply valve, and according to this result, send the control data as digital data output ``DO''. Button and anarch data output 'AO send'
After sending it out, as in Figure 5, there is a PST check #1'P8T! 7 is a 70-chart showing the details of the heron level control l in FIG. 69. Through the main controller MCT, the control level given from the terminal controller T CT m n is read out from the variable memory RAM t by means of the load control, and 1 cold water/control level>demand level # is read out. ,
After comparing the chilled water control level and the chilled water demand level corresponding to its own importance, if this is Y)fil, the opening reduction amount ts' of the chilled water valve determined according to the control level is set by adjustment control 1. Then, for hot water and steam, Kame warm water I
・Control level>Demand level #, % Hot water reduction opening determination' and 1 steam ・Control level>Demand level 11
1. Determination of steam reduction opening is performed in the same way. Based on these results, the opening of each heat source supply valve is determined, and the amount of heat supplied from the heat source is reduced accordingly, preventing overload of the heat source. In addition, the valve opening degree is - under the adjustment control l, the maximum opening degree tl
oo-, and the reduction amount is also set to the same ratio.For example, if the valve opening degree by % adjustment control is set to sOL reduction amount by 20%,
The final reduction opening is 60Is.

FIG. 8 is a diagram showing how the control level is determined in the above control, and if it is assumed that the amount of heat C supplied from the heat source changes according to the transition of time t as shown in (2) of the same figure, The first I target value M1, the second target value Ms-, and their differential value Md* + Mds are determined for the amount of heat C, and if the amount of heat C reaches the first target value Ms,
According to B), the control level L becomes %lI9, and if the amount of heat C reaches the j12 target value M3, the control level L becomes %2.
It becomes 1.

In order to prevent hunting from occurring in the control situation, when the heat itc decreases, the dicrement M1. When the control level L decreases from %21 to
The control level L changes from 11# to %ON when the change to N and further decreases to the differential Md. Therefore, the amount of heat supplied from the heat source of the refrigerator section If the amount increases, the heat consumption of each air conditioner will be reduced according to the increase, preventing overload of the heat source and saving energy. Since GTCTss to TCTmm-x stores basic control data in the variable memory RAMt and write memory PROM, the main controller MCT, sub-control rISCTt to 8CTm and each transmission line La, L
Even if a failure occurs in any or all of b*-~L and b, local control of each air conditioner will be performed without any problem due to the unique operation of each terminal controller TCTo~TCTmn-1. Main controller MCT and sub controller 8C
Tl -8CTwm are connected by a common transmission line La, and between the sub controllers 5CTs to 8CTm and each terminal controller TCT port to TCTmxh are connected by individual transmission lines L.
Because it is connected by bl-Lbm, the sub controller 8CTt
-8CT*a to terminal controller TCT1t~'ICI:w
By installing the ax near each group, the amount of wiring and wiring man-hours can be reduced, and the terminal controller TCT and sub-controller 8CT can be installed as needed, so the overall Configuration changes are extremely easy.

ζott or the control judgment function is determined by each terminal controller TCTI.
Since it is distributed over I to TCTmn, the judgment processing speed is improved and control can be performed smoothly and quickly.

However, the order of each 70-chart may be changed as appropriate depending on the conditions, or unnecessary steps may be omitted. Depending on the scale of the device configuration, the sub controllers 8CT1 to SC
It is also optional to omit Tm, and the same effect can be achieved by adding the terminal controller TCT10 function to the main controller MCT depending on the p1 situation.

Further, the same effect can be achieved even if a dedicated control circuit made of a combination of various logic circuits is used instead of using a processor as the control section, and the present invention is capable of various modifications. According to the method, overload prevention of heat sources and energy saving are achieved, and distributed control functions are managed centrally, making it easy to change general data and monitor control status, and prevent failures from occurring. The impact of this is limited locally, and
Not only does it reduce the amount of wiring and wiring man-hours, it also makes it easy to add or change the entire configuration, and the control situation becomes smooth and quick, resulting in remarkable effects in air conditioning control equipment for various uses. 0

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Fig. 1 is a block diagram of the entire configuration, Fig. 2 is a block diagram of the main controller, Fig. 3 is a block diagram of the sub-controller, and Fig. 4 is a block diagram of the terminal controller. Block diagram, 5th
6 and 6 are flowcharts showing the control operation by the processor of the terminal controller, FIG. 7 is a flowchart showing details of the note-bell control, and FIG. 8 is a diagram showing the relationship between increase/decrease in heat amount and control level. OMCT @---Main controller, 5CT1~SCTm...
・Sub-controller, TCTII~TCT m va・・Φ・
Terminal controller, TE...φ terminal equipment, T...temperature sensor, Ho...humidity sensor, F...flow rate sensor,
MV...Motor control valve, MS...Solenoid switch, CPUm, CPU5. CPUt...Processor, ROMM+a, ROMsSROMt @e...Fixed memory, RAMmSRAM1% RAMt...Variable memory, T RXI! IXT RX @s @T
RX t...e transmission circuit, IFm, IFtt, I
Ftl @ 4111 interface, WRT...
・・Writer, PROM -----Writing memory, BUS
m, BUSs. BUS t...Bus bar. Patent Applicant: Yamatake Honeywell Co., Ltd. Kinsha Agent Masaki Yamakawa (and 1 other person)

Claims (1)

[Claims] An air conditioning control device consisting of a main controller that is connected to a terminal device and sends and receives data to and from the terminal device, and a terminal controller that sends and receives data to and from the main controller and performs local control for each air conditioning device. In this step, a control level determined according to the amount of heat of the heat medium supplied from the heat source to each air conditioner is compared with a predetermined own demand level, and if the demand level is lower than the control level, What is claimed is: 1. A terminal controller with a heat demand control function, comprising a control section that performs control to reduce the heat supply to an air conditioner.