JPS58123102A - Terminal controller - Google Patents

Abstract

PURPOSE:To prevent a general control failure and to perform smooth and speedy control by dispersing a judging and controlling function to a terminal controller which controls a total head exchanger locally. CONSTITUTION:The judging and controlling function is dispersed to a terminal controller which transmits and receives data to and from a main controller and also controls the total head exchanger. For example, the outer air fan FNo, motor exhaust air fan FNb, outer air fan by-pass dumper Dd, temperature sensor Tc and humidity sensor Hc for the temperature and humidity of exhaust air, temperature sensor T0 and humidity sensor H0 for the temperature and humidity of outer air, etc., of the total heat exchanger SC are connected to the terminal controller TCTx. On the basis of respective detection outputs of the sensors Td, Hd, Tc, Hc, etc., the respective parts of the total heat exchanger SC, and outer air dumper D0 and exhaust air dumper Dd are controlled and a heat recovery judgement is made to heat or cool the rotary drum of the total heat exchanger SC through exhaust air dumpers D12-Dn2, thus performing the control.

Description

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

The conventional air conditioning control system consists of a central control unit using a computer, etc., and converters distributed throughout the premises, and the central control unit makes decisions based on data from each local converter. The results are sent to local converters to control air conditioning equipment in each section, and control decisions are made all at once in the central control section. It had the disadvantage that it was impossible to control all the party's mllli equipment.

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

In addition, in the past, all decisions were made in the central control unit, which had the disadvantage of processing a large amount of information, requiring a lot of operating time, and not being able to perform various controls smoothly and quickly. ing.

The present invention aims to fundamentally solve the drawbacks of the conventional technology, and provides judgment and control functions to a terminal controller that transmits and receives data to and from the main controller, and locally controls the total heat exchanger. In particular, the present invention provides a terminal controller having an extremely effective control function for a total heat exchanger that does not cause a general uncontrollable state and performs control smoothly and quickly.

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, and shows the main controller MCT.
K is terminal equipment Tg such as keyboard, cathode ray tube display, etc.
The main controller MCT is connected to the main controller MCT, and the data can be freely inputted by the operator and outputted to the operator by transmitting and receiving data with the tosura. controller SCT+= SCTm and the monitoring sub-controller 8CT6, and transmits predetermined data thereto, as well as each sub-controller 5CTt"' S
CTm %5 It is intended to receive data from CTo.

Further, the sub-controller 5CTI=SCTm is connected to each of the plurality of terminal controllers TCT by each transmission path LbI-Lbm.
++ ~TCTtns TCTmt ~TCTsn+
↑It is connected to CTm1 to TCTm+n, and relays data transmission and reception between these and the main controller MCT as necessary, and each terminal controller TCTr+-Tc
Is there a temperature sensor in Tmn as a local sensor? T, humidity sensor H, status contact of fan motor FM, etc. are connected, as well as motor control valve MY, electromagnetic switch MS, etc. for controlling various air conditioners are connected,
Each terminal control aTCT+t~TCTm* performs data transmission/reception with the sub-controllers 5CTs~SCTm, and
Control decisions are made based on the detected forces of each sensor T and H and the status contact of the fan motor FM, and control outputs are sent to the motor valve MY, electromagnetic switch MS, etc. to control various types of air conditioning. Each device is controlled locally.

In addition, the sub-controller 5CT for monitoring (1 includes a fire monitoring device FSU, a power control device EPC, a generator control device GNC)
Monitoring information other than air conditioning equipment is provided from sources such as the Air Conditioning System, and this information is transmitted as data as necessary.

FIG. 2 is a block diagram of the main controller MCT, with a processor CPUmf such as a microprocessor as the center, and -1
Constant memory ROMm, variable memory RAMmN transmission circuit T
RXm and interface IFm are arranged, and these are connected by bus BUSm, and all processors CPU CPU with instructions stored in fixed memory ROMm in advance.
Sub-controller 5C executed by m and transmitted through transmission circuits TR and Xm
Transmission/reception data with Ts ~ SCTm, 5CTn and terminal equipment T via interface IFm
Data sent and received with E is stored in the memory RAMr as necessary
n.

FIG. 3 shows sub-controllers S CTr to S CT m s
8 CT.

It is a block diagram of the main controller MCT, which is centered around a processor CPU5, one fixed memory, a variable memory RAM5, and transmission circuits TRX5s and TRX5.
' are arranged around the periphery, and these are connected by a bus line BU8m, and based on the instructions stored in the fixed memory ROMm, the main controller MCT and each terminal controller TCTl to TCTmn are connected via the transmission circuit TRX+5TRXl.
relays data transmission and reception between the
Alternatively, the monitoring information is transmitted while accessing the variable memory RAMm.

Figure 4 is a block diagram of the terminal controllers TCTu-TCTmnQ, which, like the controller MCT, is centered around a processor CPUt as a control unit, and has a fixed memory R.
OMt, variable memory RAME2, transmission circuit TRXt, and interfaces IFtt and IFtm are arranged around the periphery, and these are connected by internal MBUSt.
amable R@ad 0nly M@mory,)
A write memory FROM is provided, which is connected to the mother @BUSt via a writer (write circuit) WRT for writing data, and data access to the write memory FROM is provided through this. The data once written is retained forever until it is erased by ultraviolet irradiation or air-resistant means.

Ma, possible t Me-v-9RAMt K'fl, [Source + V
A large capacitor CPS is connected to the side.
Even if there is a power outage at the main source, the variable memory R will last approximately 48 hours.
AMt's Rakuno data will not disappear. (1) The same applies if a battery is used in place of the capacitor Cps.

Note that the processor CPUt is a fixed memory IJ ROM
It executes the instructions stored in t, sends and receives data to and from controllers SCT+ to SCTm via transmission circuit TRXt, and sends and receives digital data input DI and analog digital input AI from each sensor and status contact via interface IFtl. It receives and sends digital data output l) 0 and analog data output AO to each control part, but important data is fixedly stored in the write memo UPROM via the writer WRT. The processor CPUt makes control decisions according to the data DI and AI indicating the detection force of each sensor and the status of the status contact, and the transmitted and received data, and then sends out each data output DO1AO as a control output. It has become.

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

As shown in the configuration diagram shown in Fig. 5, the total heat exchanger (hereinafter referred to as the exchanger) is connected to the outside air fan F of the SC, the exhaust fan FNd of the motor M1, and the outside air fan (DO% exhaust fan bypass Ddl). (
Temperature sensor Td and humidity sensor Hd that detect 4 degrees,
A temperature sensor T62 and a humidity sensor T62, which detect the temperature and humidity of the outside air, a humidity sensor, etc. are connected, and the status contact S of the outside air fan FNo and exhaust fan FNd is connected.
o, 8d, exhaust Dan in air conditioner Act~ACn”
Potentiometers P1 to Pns that detect the opening of Dsz to Dnm Status contacts 5t-8tL of fans F'Ns to El'NT1 Status contacts 5l to 8n of connected and separately controlled air conditioners ACt to ACn Based on the output of , the output of bot//yometers P1 to Pn, and each detection force of 1, each sensor Td, Hds Tos Ho, each part of AC p%SC and outside air damper <p O1 exhaust chamber Dd are controlled. It has become a thing.

Oh, according to the heat recovery judgment, it is better to recover the heat outside.
Exhaust air Ad from the room is sucked up by an exhaust fan FNd via exhaust Dan/<DIl~Dns, and is discharged after heating or cooling the rotating drum of the exchanger SC. However, in order to save energy consumption, some is the reflux damper Dos
On the other hand, when the exhaust volume through the exhaust dampers D1!~l is less than the rated air volume of the exhaust fan FNd, the exhaust fan FNd A part of the ventilation sent out from the exhaust fan FNd is circulated through the bypass damper Dd, so that the suction side of the exhaust fan Fnd does not become extremely negative pressure.

In addition, the outside air Ao is sucked by the outside air fan FNo,
After coming into contact with the rotating drum heated or cooled by the exhaust air of the exchanger SC and being heated or cooled to save energy consumption, the outside air is given to the air conditioner ACI-ACn via the air filter FL, After passing through the cooling coil CC1 heating coil HC and the humidifying spray SP, it is sucked in by the fan FNI" Fn and supplied into the room, but if all the air is exhausted * If the outside air intake amount is lower than the rated scenery of the outside air fan FNo. In this case, the discharge side of the outside air fan FN (by circulating a part of the ventilation sent out from the outside air fan FNo through the air pass damper Do) is assumed not to become extremely positive pressure.

FIG. 6 shows the processor CPUt of the terminal controller TCTx.
This is a comprehensive flowchart showing the control operation according to the following.When the power is turned on, after recovery from a power failure, '5TART' is performed, initialization 1 is performed with 11 initial settings, and test data is accessed to the variable memory RAMtK. , to determine whether the access to this is normal, to determine whether or not the set value data is stored in the variable memory RAMt, and to perform this upon recovery from a power outage.
Perform "Shizuku self-diagnosis" by determining whether the total number of bits of the stored data is the same as before the power outage, etc., and if there is 1 abnormality and 71 is YES, write memo IJPR.
After performing ``1 error countermeasure processing'' such as transferring the contents of OM and newly storing it in the variable memory RAMt, the error is sent to the main controller MCT via the sub controllers 8CTs to SCTm in 1 data transmission/reception. At the same time, the main controller MCT notifies the controller MCT of the occurrence of the required data, and stores the data in the variable memory RAMt.

1 Abnormal! +? If ' is NO, digital data input 'DI capture' and analog data input 'AI capture' are carried out, and after storing these in the variable memory RAMt, the later-described "time schedule control", "rebel control", 1
Upper and lower limit monitoring 1.1 Performs total heat exchanger control, ◆Fire control, etc., and outputs digital data 1 according to these results.
After performing "DO sending" and analog data output %AO sending 1, the presence or absence of the setting device PST is judged by "% PST check", and if "PST present?W" is NO, it immediately moves to 1 data sending/receiving. , in response to YES, performs one-to-PST processing such as sending data to the setting device PST and storing data from the setting device PST, and performs one data transmission/reception 1 to update each of the required current conditions. While transmitting data, the received data is stored in the variable memory RAMt, and the above operations are repeated.

That is, as shown in the two-chart of 1 time schedule control 1 in Fig. 7, the deaf time schedule calculation and
By time check 1, the use start time t and the use end time t6 stored in the variable memory RAM t-\weekly program are read out, and the processor C
Check that it matches the time measured by the clock configured inside the PUt, and the result is the %ON time! ”
If YES, perform a 1-time flag set,
If %ON time zone 7'' is NO, 1 time flag reset # is immediately performed.

Note that the clock in the processor CPUt may be set as necessary.
By transmitting and receiving 1 data with the main controller MCT, poetic ability 1
Internal calibration is performed.

FIG. 8 is a flowchart of "Level control", which shows the demand level of predetermined importance for the terminal controllers TCTo to TCTmnS TCTx, the power consumption status, the operation status of the emergency generator in the event of a power outage, and If the demand level is lower than the command level given from the monitoring sub-controller 5CTo via the sub-controllers SCT+ to SCTm, there is no comparison with the command level determined according to the situation such as power failure recovery, etc. , the operation of the switch SC is stopped.

The command level and demand level are divided into those depending on the power consumption situation, those when the power is restored after a power outage, and those when the generator is running, and the above-mentioned levels are compared for each condition. It will be done.

In other words, in Fig. 8, if ↑1 is NO during a power outage, a level comparison is made according to the power consumption situation using the power command level > power demand level, and if this is YES, the air conditioner is immediately turned off. 1 is in operation, the level flag is reset to 1, whereas in the case of 'Power command level>Power demand level 9, -Power failure/recovery demand level>Power failure/recovery demand level 1 will set the level at the time of power outage recovery after a power outage. A comparison is made, and if this is YES and 1 operation is in progress, the process moves to ``level flag reset'', and if this is NO, if 1 time schedule is 1 operation time zone, the level flag is reset to 1 and the time flag shown in Figure 7 is checked. Moreover, a level flag is set to turn on the switch SC.

Also, during a power outage? If `` is YES, 9 generator command level 2 generator demand level'' is used to compare the levels during generator operation, and depending on this, if 11 is in progress, the level flag is reset, and depending on this, the level flag is reset. If it's during Harim schedule time, move to Level 2 Gusevi.

Note that these are performed for each control item, so if one control item is complete? The above operations are repeated until " is YES.

FIG. 9 is a flowchart of ``1 upper and lower limit monitoring'', in which the actual measured temperature value Tp is monitored, compared with the predetermined six alarm upper limit values TMA and the alarm lower limit values TLA, and the actual measured value Once Tp reaches these, the main controller MC
Data indicating a warning is to be sent to T.

In other words, is 1 power ON of the switch SC? Assuming that “If η is equal to η, then one unstable period has elapsed immediately after startup!” is YES, the alarm upper limit value TIIA and the same lower limit value TL stored in advance in the variable memory RAMt are
A and the actual room temperature value 'rp measured by the temperature sensor Td as %
Compare 'fp≧T, m' and Tp<'l'tA', and if these are YES, an alarm flag is set, and 1 is sent to the main controller MCT by data transmission.
However, in these Nos., 1 alarm flag reset is performed, and 1 return message is sent.
Do the following.

In addition, in Fig. 9, the actual indoor temperature measured by detecting the exhaust gas temperature by the temperature sensor Td is targeted, but in addition, various necessary physical quantities such as indoor humidity, temperature and rotation speed of each part of the exchanger SC are considered. can also be applied.

Figure 1θ is a 7p chart of total heat exchanger control 1, and shows the status of exhaust fan FNd that is operated according to the above-mentioned time flag. Exhaust fan status ON? If the result is NO, the exchanger SC is out of operation, so the damper Dd is fully closed by 1 exhaust fan bypass damper fully closed, and then 1
The outside air fan FNo.
In addition, by fully closing the outside air fan bypass damper 1, the damper Do is fully closed.

Also, is the 1 exhaust fan status ON? If `` is η2, in order to operate the exchanger SC, perform 1 exhaust fan bypass damper opening gauge, etc., and then 10
A > iRA”, each sensor Td, Hd
Based on each detected power of N TO% HO, calculate and compare the outside air enthalpy i0A and the inside air enthalpy iRA, and if the result is YES, 1 outside air fan status is ON? ' is No, outside air fan FN
1 outside air fan flag setting to set the operating state to 1 outside air fan, and then 1 outside air fan bypass damper opening calculation.

Note that the outside air fan FNo and the motor M of the exchanger SC are interlocked, and as the fan FNQ is operated, the rotary drum of the exchanger SC also rotates to perform heat exchange.

On the other hand, in the case of '10A >iRA', S T
OA≦TL”, the outside air temperature TOA is compared with the predetermined minimum outside air temperature TL, and this is YES.
If so, it moves to 1 outside air fan/7 settings 1, but if this is No, 1 outside air fan status is OFF? “
In response to the No. of outside air fan FNo, in order to stop the outside air fan FNo, perform 1 outside air fan/flog reset, and then fully open the same damper Do with 1 outside air fan bypass damper fully open, and even if outside air fan FNo stops, It shall be possible to take in outside air.

Furthermore, 1 exhaust fan bypass damper/paper opening degree calculation 1 and 1 outside air fan bypass damper opening degree calculation are performed by the following equations.

In other words, the rated air volume of outside air 7 am FNo. is Wr.

W
d, the opening degree Mv of the damper Do is expressed by the following equation.

Mv = (1-”) x 100%r Exhaust fans are operated in a similar manner.

In addition to the above, ``1 fire control'' is performed, and when information of a fire outbreak is given from the monitoring sub-controller 5CTo, the outflow of fire smoke is prevented from spreading to other parts. At the same time, in order to prevent ventilation from accelerating the combustion of the fire, a fire flag is immediately set, and the operation of the switch SC is stopped by interrupt processing, and at the same time, each ventilation damper is blocked, and information on the end of the fire is immediately displayed. Maintain this state until the

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 calculated value, and as shown in FIG.
Actual control outputs are sent to each part by "O sending" and analog data output "AO sending", and data related to these decisions and control status data are edited in sub-controllers SCT+ to SCTm. Furthermore, since data is transmitted and received between the main controller MCT and the terminal controller TCTx, data indicating the latest control status is always stored in the usable memory RAMm in the main controller MCT, and this data is sent to the terminal equipment TI. While it is possible to confirm,
The nine latest data provided from the terminal equipment TE will be stored in the variable memory RAMt of the terminal controller TCTx.

Taso, terminal controller TCT! Since the basic control data is stored in the variable memory RAMt and the write memory PROM, the main controller MCT and the sub-controller 5CTs
” SCTm and each transmission line La.

Even if a failure occurs in any or all of Lb5 to Lbm, local control of the exchange SC and each damper Do, DdK is performed without any problem due to the operation of the terminal controller TCTx & itself.

In addition, the main controller MCT and the sub controllers 5CTs to SCTm
, SCT・ are connected by a common transmission path La, and the sub controllers SCT+ to SCTm and each terminal controller TC
Twt = TCTnin, expansion with TCTx,
Since each individual transmission path Lbl w Lbm is connected, if the sub-controllers 5CT1 to SCTm are installed in the vicinity of each group of terminal controllers TCTo=TCTmns TCTz, the amount of wiring and wiring man-hours can be reduced. In addition, since the terminal controller TCT and sub-controller SCT can be provided as necessary, the overall configuration changes
becomes extremely easy.

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

In addition, the order of each flowchart may be changed as appropriate depending on the conditions, or unnecessary steps may be omitted.
It is optional to omit CTm, and the present invention Fi can be greatly modified, such as by not using a processor as a control unit and using a dedicated control circuit that is a combination of various via logic circuits.

As is clear from the above explanation, according to the present invention, distributed control functions are centrally managed, making it possible to change general data and monitor the control status, and to prevent the effects of failures from occurring. In addition to being locally limited, the amount of wiring and wiring man-hours can be reduced, and it is easy to add or change the entire configuration, and the control situation is smooth and can be applied quickly. Including the exchanger! I
Remarkable effects can be obtained in air conditioning control devices for I applications.

[Brief explanation of the drawing]

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
Fig. 6 is a block diagram showing the connection status between the terminal controller and the outside according to the present invention, Fig. 6 is a comprehensive flowchart showing the control situation by the control unit, Fig. 7 is a flowchart of time schedule control, and Fig. 8 is a level diagram. control flowchart,
FIG. 9 is a flowchart of upper and lower limit monitoring, and FIG. 10 is a flowchart of total heat exchanger control. MCT-”-”Main controller, 5CTt ~ SCTm
@-...Sub controller, TCTo ~TCTmn, TC
TX...Fist terminal controller, TE...e-terminal device, 7o, Td, 'p 11 @ 1111 temperature sensor, Ho, Hd, H...humidity sensor, CPUtn
, CPU5. CPUt・Φ・・Processor, ROMm
, ROMa, ROMt...Fixed memory, RAM
m, RAM5, RAMt...variable memory,
TRXm, TRX1t r TRX5l. TRXt-""transmission circuit, Ikm + IF tt
+ IFts...interface, WRT...
・Writer, ) 'ROM' `` '''Writing memory, BUSm. Buss, BUSt * ・@ ・Bus bar, SC@ @
@ II exchanger (total heat exchanger), ACs = ACn
...Air conditioner, FNo ...-Outside air fan, Fn
d...-exhaust fan, Do...outside air fan bypass damper, DdΦ...exhaust fan bypass damper. % Ganto Suda Yamatake Honeywell Co., Ltd. Agent Masaki Yamakawa (and 1 other person) Figure 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] The air conditioner consists of a main controller that is connected to the shoulder air conditioner and sends and receives data to and from the terminal equipment, and a terminal controller that sends and receives data to and from the main controller and also performs local control for each type of air conditioning equipment. In the control device, control is performed to determine the time period in which power is allowed to be turned on to the total heat exchanger based on a predetermined time schedule, and from the command repe X given a demand level corresponding to the importance of the total heat exchanger control to stop the operation of the all-island exchange when the actual value is at a low level, control to send out an alarm when the actual value is above the alarm upper limit value and below the alarm lower limit value, and control over each part of the island exchange machine. A terminal controller specially designed to be equipped with a control section that performs control in response to the occurrence of a fire.