JPS58106606A - Terminal controller with pump control function - Google Patents

Abstract

PURPOSE:To control terminals with pump control function very efficiently, by decentralizing discriminating and controlling functions for terminal controllers controlling pumps for air-conditioning water locally, preventing the overall control disable state and attaining smooth and quick control. CONSTITUTION:A temperature sensor T, a humidity sensor H and a status contact of a fan motor FM are connected to terminal controllers TCT11-TCTmn as local sensors. Further, a motor control valve MV and an electromagnetic switch MS are connected. The controllers TCT11-TCTmn discriminate the control based on the data transmission/reception with subcontrollers SCT1-SCTm, each detected output of the sensors T, H and the status contact of the FM and gives a control output to the MV and the MS. Thus, the opening of the MV is controlled according to the detection temperature of the T.

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, etc., and local converters distributed throughout the premises, and the central control unit makes decisions based on data from each local converter. processing and sending the results to local converters to control the air conditioning equipment in each section.9 However, control decisions were made all at once in the central control section, so due to a failure in the central control section. This had the disadvantage that it was impossible to control all air conditioning equipment.

In addition, because the central control unit and each local converter are connected by individual wiring or by multiple busbars, the amount of wiring is extremely large, and the cost of required wire materials and wiring man-hours is high. In addition to being expensive, it is not easy to change the configuration by adding a local converter, and it also has disadvantages such as not being able to freely combine the configuration of the device.

In addition, in the past, all decisions were made in the central control unit, which resulted in a large amount of information being processed, a lot of operating time required for processing, and the disadvantage that various controls could not be carried out smoothly and quickly. There is.

The present invention has the purpose of fundamentally solving the drawbacks of the conventional technology, and provides judgment and control functions to the terminal controller that transmits and receives data to and from the main controller, and locally controls the pump for air conditioning water. The present invention provides a highly effective terminal controller with a pump control function that does not cause a general uncontrollable state and performs control smoothly and quickly by distributing the pump control functions.

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

Fig. 1 is a block diagram of the entire configuration. The main controller MCT is connected to terminal equipment TE such as a keyboard and a cathode ray tube display device, and data is exchanged with these devices to enable data input by the operator and data to the operator. While the output of the main controller MCT is freely controlled, the output of
is connected to the sub-controllers 5CTl to SCTm and the monitoring sub-controller 8CTO, and transmits predetermined data thereto.
It receives data from the TO.

Further, the sub-controller SCT ll-5cT connects each of the plurality of terminal controllers TC through respective transmission paths Lbl-Lbn+.
TII~TCTln, TCTI l-IrcTm%, T
CT'*1 is connected to CTmn, and the main controller M
It relays data transmission and reception with the CT as necessary, and each terminal controller TCT l l-/rcT
ms is connected to local sensors such as temperature sensor T%, humidity sensor H, and status contacts on the fan motor side, as well as motor control valves and electromagnetic switches for controlling various air conditioning equipment. and each terminal controller TCT l l-frcTma has a sub-controller 5
Data transmission and reception with CT1 fence CTrm and each sensor T,
A control judgment is made based on the detected force of H and the state of the status contact to the fan motor, and motor valve W1 is
By sending control outputs to electromagnetic switches, etc., each type of air conditioning equipment can be locally controlled.

In addition, the fire monitoring device F is installed in the monitoring sub-controller 5CTO.
Monitoring information other than the air conditioner is provided from the 8U, the power control device RPC, the generator control device GNC, etc., and this information is transmitted as data as necessary.

As shown in the configuration diagram in FIG.
A motor valve M′vl that controls the water supply amount, that is, the supply amount
, a temperature sensor Tl that detects the temperature of the water supplied to the local heat source via the heat exchanger T, a temperature sensor Ts1 that detects the temperature of the water flowing back to the heat exchanger
A status switch 81 that operates according to each pump operation. A status switch 88, etc., which operates in response to full closure of motor valve MVI, which controls the amount of bypass between Sm and headers HDI and HD1, is connected, and also controls the operation of main engine PL and auxiliary engine PT, which are omitted in the diagram. electromagnetic switch is connected.

The local heat source water that has undergone heat exchange with the external heat source water W8 flowing into the heat exchanger HT via the motor valve MVI is sent out as feed water Wf via the main engine P1, the auxiliary equipment P3, and the header) IDI, and is sent to each After distributing the air conditioner, return water Wr.
However, both headers HDI,
Based on the detected forces of the pressure sensors Pal and PI9m installed on the MDI, the differential pressure regulator PIC adjusts the motor valve M'v! The differential pressure between the headers MDI and HDi1 is adjusted by controlling the opening degree of the headers HDI and varying the amount of pinox between the headers HDI and HDI.

On the other hand, if the load state is small, the temperature difference between the feed water Wf and the return water Wr is small and the motor valve MVS is opened to a large degree, and the temperature , T
The operation of the auxiliary equipment ps is controlled according to the temperature difference detected by I and the status of the status switch 8s, while the opening degree of the motor valve MVI is controlled according to the temperature detected by the temperature sensor T1. .

FIG. 3 is a block diagram of the main controller MCT, which is centered around a processor such as a microprocessor CPU5, a fixed memo') ROM1 variable memory operation, and a transmission circuit TRXyg.
and interface Fm are arranged, and these are connected by a bus line BUS+%, and instructions stored in the fixed memory ROMy+s in advance are sent to the processor CPU5.
is executed by the sub-controller 5CT via the transmission circuit TFOcM.
l-sCTs, transmission and reception with 5CTO:
The data exchanged with the terminal device TE via the yp-face IF 711 is accessed to the variable memory RAM 711 as necessary.

FIG. 4 is a block diagram of the sub-controllers 8CT1-8CT and SCT0, which, like the main controller MCT, is centered around a processor CPU5, a fixed memory ROM5, a variable memory RAM5, and transmission circuits TRX5l, TRX5.
I are arranged around the main controller MCT and each terminal controller TCTI 1-JrCTm via the transmission circuits TRXI and TRX5 based on the instructions stored in the fixed memory IJ ROM5.
s and TCTz is relayed while accessing the variable memory RAM 5 for necessary data, or transmitting monitoring information while accessing the variable memory n.

FIG. 5 is a block diagram of the terminal controller TCTr, which, like the main controller MCT, is centered around a processor CPUt as a control unit, a fixed memory ROMt, a variable memory RAMt, a transmission circuit TRXt, and interfaces IFtl, IFtfi. are arranged around the periphery and connected by bus line BU8t, but programmable read only memory (Programmable Read Only Memory
Writing memo IJ using 0nly Memory, )
A PROM is provided, which is connected to the bus line BUSt, through which data is accessed to the write memory FROM, and once written data is erased by ultraviolet irradiation or electrical means. It is retained forever until it is operated.

In addition, the variable memory RAMt has a large capacitor CPII connected to the +V side of the power supply, 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. ing. However, the same effect can be obtained even if a battery is used instead of the capacitor CpsO.

Note that the processor CPUt executes instructions stored in the fixed memory ROMt, sends and receives data to and from the sub-controller 8CT1"SCTm via the transmission circuit TRXt, and receives and receives digital data from each sensor and status switch via the interface IFtl. Receiving input DI, analog data input, digital data output Do, analog data output AO for each control part
The necessary data is sent to the variable memory RAM.
I am accessing t, but the important data is written by writer WR.
The processor CPUt makes control decisions according to each data DI, AI, and transmission/reception data indicating the detection power of each sensor and the status of the status switch. In addition to doing so,
Each data output DL) and AO are sent out as control outputs.

In addition, a small and portable setting device PST having a keyboard and a character display is connected to the connector CN via the interface IFe if as necessary.
The processor CFUt responds to this operation, and the contents of the variable memory RAMt and write memory PROM are displayed, and data can be updated or new stored therein.

FIG. 6 is a comprehensive flowchart showing the control operation by the processor CPUt of the terminal controller TCTz. After turning on the power or recovering from a power outage, "5TART" is performed, "initialization" is performed to set the initial state, and the variable memory is Access test data to RAMt, judge whether access is normal or not, variable memory RA
"Self-diagnosis" is performed by determining whether or not the set value data is stored in Mt, and determining whether the total number of bits of data stored in the variable memory RAMt is the same as before the power outage occurs when the power is restored. If YB2 is "Is there an abnormality?", perform "abnormality countermeasure processing" such as transferring the contents of the write memory FROM and newly storing it in the variable memory RAMt, and then "data transmission/reception". , the main controller MC via the sub-controller SCT 11-5CT
In addition to notifying T of the occurrence of an abnormality, it also receives the necessary data from the main controller MCT and stores it in the variable memory RA.
Store in Mt.

1 Is there an abnormality? ” is No, digital data input “DI import” and analog data input “AI import” are performed, and after storing these in the variable memory IJ RAMt,
"Time schedule control", 7-level control" described later,
“Upper and lower limit monitoring”, “pump control” and “adjustment control”,
``Fire control'' etc., and digital data output ``D'' is performed according to these results.

After performing "Send" and analog data output "AO Send", the presence or absence of the setting device PST is determined by "PST check", and "FAT present?" If " is No, the process immediately moves to "data transmission/reception," but if this is YES, "PST processing" such as sending data to the setting device PST and storing data from the setting device PST is performed. up,
Performs "data transmission and reception", transmits each required current data, and stores variable memory of received data in IJ RAM
Store t and repeat the above operations.

FIG. 7 is a 70-chart of "time schedule control", and is a 70-chart of "time schedule control".
Accordingly, the weekly program is stored in the variable memory mt. After reading out the use start time tv and the use end time t'-, check whether they match the time measured by the clock configured inside the processor crt+t,'
If it is YES for "ON time period?", "time flag set" is performed, and 'ON time period?' ” is no
If so, immediately perform a “time flag reset”.

This is allowed only between the use start time ta and the use end time t-.

Note that the time of the clock in the processor CPUt is calibrated by "data transmission/reception" with the main controller MCT as necessary.

FIG. 8 is a flowchart of "level control", in which demand levels of predetermined importance are determined for the terminal controller TCTz, power consumption status, emergency generator operation status during power outage, and power outage recovery. A comparison is made with the command level determined according to the situation, and the monitoring sub-controller 8CTo to sub-controller 8CTl-8
If the own demand level is lower than the command level given via CTs, the operation of the air conditioner is stopped.

In addition, the command 0 level and demand level are divided into those depending on the output consumption status, those at the time of power recovery after a power outage, and those during generator operation. A level comparison is made.

That is, in FIG. 8, "Power outage?" is N.

If so, a level comparison is made according to the power consumption situation by "power command level ≧ power demand level",
If this is YFiS, the air conditioner will immediately "reset the level flag if it is in operation", but if the "power command level ≧ power demand level" is No, "power failure recovery command level ≧ power failure recovery demand level" ``, the level is compared when the power is restored after the power outage, and if this is YES, the level flag is reset if 1 operation is in progress.If this is No, the level flag is set if it is during the time schedule operation.'' After checking the time flag in FIG. 7, the level flag for turning on the air conditioner is set.

In addition, if YES to "Power outage?", the level is compared during generator operation using the "generator command level and generator demand level", and depending on YES, "level flag reset if operating" is performed. In response to No., the process shifts to "level flag set if time schedule period".

Note that these operations are performed for each control item, so the above operations are repeated until "all control items ahead!" reaches πS.

FIG. 9 is a flowchart of "upper and lower limit monitoring", in which the actual measured temperature value Tde is monitored and compared with the predetermined alarm upper limit value TIm and alarm lower limit value TT-m. If the actual measured value Tp reaches these values, the main controller MC
Data indicating a warning is to be sent to T.

In other words, if the "power ON?" of the air conditioner is ygs, it is assumed that the "unstable period has elapsed?" is YES immediately after startup, and the alarm upper limit value TI value stored in the variable memory RAMt is set in advance. and the same lower limit value TL&,
The actual value TP from the temperature sensor 'I'l or TI is
Tp≧THA'', “T? ≦Comparing with T shims, these YICEI K performs "alarm flag setting" and "alarm sending" is performed by data transmission to the main controller MCT, but in these No., "alarm bladder reset" is performed. and sends a return message.

In addition, in FIG. 9, the actual temperature value T? However, it can also be applied to various necessary physical quantities such as pressure and flow rate of each part of air conditioning equipment.

FIG. 10 is a flowchart of "pump control",
'Time schedule driving hours? ” to check the time flag, and if this is YES, “Is the main engine running?” “NO” and “Main engine failure? ``Main engine flag set'' is performed to start operation of the main engine pi assuming No.

Also, if ``Main engine running 1'' is ``ms'', then ``Has a predetermined time elapsed after changing the number of units?'' including starting the main engine P1? Temperature sensor 'I'l is connected via NO of "...S and 12 units in operation?"
, checks "Is the temperature difference large?" based on the detection power of TI, and if this is YES, the status switch Bm
Depending on the output, check "No (Innox valve fully closed for more than a predetermined time!"), and if this is YES, start operation of the auxiliary equipment PI based on the assumption that 'Auxiliary equipment failure?' is No. Perform “auxiliary machine flag set”.

On the other hand, are there two cars in operation? If the answer is YES, the temperature difference flux 〒7 is checked based on the detection power of the temperature sensors Ti and Tm, and if this becomes πS, the auxiliary equipment flag is reset based on the assumption that the answer to ``Auxiliary equipment failure?'' is No. and stop the operation of the auxiliary machine P.

If ``Auxiliary machine failure?'' is YES, the operation of the main engine Pl is stopped by ``Main engine flag reset'' via No of ``Main engine failure?''.

In addition, “Time schedule operation hours?” is NO.
If so, the operation of the main engine pi and the auxiliary engine ps is stopped by "auxiliary machine) 2 reset" and "main engine flag reset".

The presence or absence of a failure in the main engine Pi and auxiliary equipment pi is determined by the status of the main engine flag and auxiliary equipment 7 lug, and the status switch 1.
The decision will be made based on the inconsistency with the situation of 91.81.

Although the above explanation is based on two pumps, it is clear that the operation of a plurality of pumps can be controlled based on temperature differences in a similar manner.

After performing the above "pump control", the "adjustment control" shown in FIG. 6 is performed, but this control is performed by the temperature sensor Tl
According to the detection power of the water supply W
This is done by controlling motor valve MVI so that the temperature of f is maintained within a predetermined range.

In addition, "fire control" is carried out, and when fire information is given from the monitoring sub-controller S (['To], the operation of each air conditioning equipment is stopped, so a fire flag is immediately set. is set, the operation of the main engines Pi and pm is stopped by interrupt processing, and this state is maintained until information that the fire has ended is given.

Therefore, when each of the above routines is completed, the final control output is determined according to the status of each flag and the status of the control amount, and as shown in FIG.
Actual control output is sent to each pump and motor valve MVI of the main engine Pi and auxiliary equipment ps by the analog data output ``AO send'' and the analog data output ``AO send'', and the data and control status involved in these decisions are sent. Since the data is edited in the sub-controller 8CTl-sC'ra and is sent and received between the main controller MCT and the terminal controller TCTx, the main controller MCT always has data showing the latest control status. Variable memo IJ BAkAn
i and can be confirmed by the terminal device TE, while the latest data given from the terminal device TE is stored in the variable memory RAMt of the terminal controller TCT&.

However, since the terminal controller TCTs stores basic data for control in the variable memory RAMt and the write memory FROM, the main controller MCT and the sub-controllers SCTl~
5CTFII and each transmission line La, Lbl-Lbsa
Even if a failure occurs in any or all of the air conditioners, the unique operation of the terminal controller TCTg allows local control of each air conditioner to be performed without any problems.

Moreover, the main controller MCT and the sub-controllers SCT 1-6CT are connected by a common transmission path L5L, and the sub-controllers BCT1-8CTya and each terminal controller TCT l 1
(Each individual transmission line L between cT+as and TCTx
Because it is connected by bl=LbjlI, the sub controller 5C
Tl-sCTIIll to terminal controller TCTII~TC
If each group of Tsa and TCTg is installed 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 necessary. It becomes extremely easy to change the overall configuration.

Note that since the control decision function is distributed to the terminal controller TCTg, the decision processing speed is improved and control can be performed smoothly and quickly.

In addition, 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-controller 8CTl-s
The present invention can be freely modified in various ways, such as omitting CT+s as desired, and using a dedicated control circuit using a combination K of each logic circuit instead of using a processor as the control unit. .

As is clear from the above explanation, according to the present invention, distributed control functions are managed centrally, so it is possible to change general data and monitor the control status, and also to prevent failures. In addition to limiting the impact of damage to local areas, reducing the amount of wiring and wiring man-hours, it also becomes easier to add or change the entire configuration, and the control situation becomes smooth and prompt. , remarkable effects can be obtained in air conditioning control capacity for various applications.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, FIG. 1 is a block diagram of the entire configuration, FIG. 2 is a configuration diagram showing the connection status between the terminal controller and the outside according to the present invention, and FIG. 3 is a block diagram of the main controller. Figure, 4th
Figure 5 is a block diagram of the sub-controller, Figure 5 is a block diagram of the terminal controller, Figure 6 is a comprehensive flowchart showing the control status by the control unit, Figure 7 is a flowchart of time schedule control, and Figure 8 is a flowchart of time schedule control. Level control flowchart,
FIG. 9 is a 70-chart for upper and lower limit monitoring, and FIG. 10 is a flowchart for pump control. MCT --- Main controller, TCT l 1-TCT+
ms, TCTg...Terminal controller, Pl...
Main engine, Ps...auxiliary 4L TllTl...temperature sensor, Mvl...motor valve, 8l-f3fi...
・Status switch, Wf...Water supply, Wr...
・Return water. Patent applicant Yamatake Honeywell Co., Ltd. Agent Masaki Yamakawa (1 person working)

Claims (1)

[Claims] In 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 type of air conditioning device. 1. A terminal controller with a pump control function, comprising a control unit that controls the operation of a plurality of pumps according to load requests.