JPS6337859B2 - - Google Patents

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.

Such 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 performs judgment processing based on data from each local converter. The results are sent to the local converter to control the air conditioning equipment in each section, and control decisions are made all at once in the central control section, so a failure in the central control section could result in a total failure. This had the disadvantage that it was impossible to control the 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. becomes more expensive,
It is not easy to change the configuration by adding a local converter, and it also has drawbacks such as not being able to freely combine various combinations due to the device configuration.

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

The present invention aims to fundamentally solve such drawbacks of the conventional art, and includes a main controller that is connected to a terminal device and sends and receives data to and from the terminal device, and a main controller that sends and receives data to and from the terminal device, and a main controller that sends and receives data to and from the terminal device. In an air conditioning control device that consists of a terminal controller that locally controls each air conditioning device, a fixed memory that stores instructions, a variable memory that accesses data, a clock function, and a clock time determined in advance by the clock function. a time schedule control means for determining a time period in which power is allowed to be turned on to an air conditioner based on a time schedule set by the user; A lower limit monitoring control means, a time schedule control means that determines the time period in which power is allowed to be turned on for the air conditioning pump based on a predetermined time schedule, and a demand level that is determined according to the importance of the equipment to be used. A level control means that stops pump operation when the command level is lower than a command level set, a number control means that operates multiple pumps according to load requests, and a valve opening degree of external heat source water according to the temperature of water supply An extremely effective air conditioner, which is equipped with an adjustment control means for varying the temperature, and a control means for displaying the contents of the variable memory and updating the data in the variable memory according to the operation of a connected setting device as necessary. A terminal controller having various functions for pump control is provided.

Hereinafter, details of the present invention will be explained with reference to figures showing examples.

Figure 1 is a block diagram of the entire configuration, and the main controller
The MCT is connected to terminal equipment TE such as a keyboard and a cathode ray tube display, and by transmitting and receiving data with these devices, data can be freely input by the operator and data can be output to the operator.
The main controller MCT is connected to the sub-controllers SCT ₁ to _{SCT n} and the monitoring sub-controller SCT ₀ through a common transmission line La, and transmits predetermined data to each sub-controller SCT. It is designed to receive data from _{SCT n} and SCT ₀ .

Further, the sub-controllers SCT ₁ to SCT _n each connect to each of the plurality of terminal controllers through respective transmission paths Lb ₁ to Lb _n .
TCT ₁₁ ~TCT _1o , TCT ₂₁ ~TCT _2o , TCT _n1 ~
It is connected to TCT _no and relays data transmission and reception between these and the main controller MCT as necessary, and each terminal controller TCT ₁₁ to TCT _no has
Temperature sensor T, humidity sensor H, fan motor FM status contacts, etc. are connected as local sensors, as well as motor control valve MV and electromagnetic switch MS for controlling various air conditioning equipment.
etc. are connected, each terminal controller TCT ₁₁ ~ TCT _no ,
Data transmission and reception with sub-controllers SCT ₁ to SCT _n , 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 the motor valve MV and electromagnetic switch MS are
By sending control outputs to the air conditioners, etc., each type of air conditioning equipment can be locally controlled.

The monitoring sub-controller SCT ₀ includes a fire monitoring device FSU, a power control device EPC, and a generator control device.
Monitoring information other than air conditioners is provided by GNC, etc., and this information is transmitted as data as necessary.

However, any applicable terminal controller TCT _x of the terminal controller TCT ₁₁ to _TCT no of the present invention includes:
As shown in the configuration diagram shown in Figure 2, heat source water from outside
A motor valve MV ₁ that controls the water supply amount of Ws, that is, the supply amount, a temperature sensor T ₁ that detects the temperature of the water supplied to the local heat source via the heat exchanger HT, and a heat exchanger HT.
A temperature sensor T ₂ that detects the temperature of the return water flowing back to the
Status switches S ₁ and S ₂ and headers that operate according to each pump operation of main engine P ₁ and auxiliary engine P ₂
Motor valve that controls the amount of bypass between HD ₁ and HD ₂
A status switch _S3, etc., which operates when MV ₂ is fully closed, is connected, and furthermore, electromagnetic switches for controlling the operation of main engine _P1 and auxiliary engine _P2, which are omitted in the diagram, are connected.

Note that the local heat source water that has undergone heat exchange with the external heat source water Ws that flows into the heat exchanger HT via the motor valve MV ₁ is transferred to the main engine P ₁ , the auxiliary equipment P ₂ , and the header.
It is sent out as feed water Wf via HD ₁ , circulates through each air conditioner, and then returns to header _{HD 2} as return water Wr _.
Based on the detection power of PS ₁ and PS ₂ , differential pressure regulator PIC
controls the opening degree of motor valve MV ₂ , and both headers HD ₁ ,
By varying the amount of bypass between HD ₂ , both headers HD ₁ ,
The differential pressure between HD ₂ is adjusted.

Therefore, if the load condition of each air conditioner is large,
If the temperature difference between supply water Wf and return water Wr is large, and the motor valve
MV ₂ is in a small opening state, whereas if the load state is small, the temperature difference between the feed water Wf and return water Wr is small and the motor valve MV ₂ is in a large opening state. , depending on the temperature difference detected by temperature sensors T ₁ and T ₂ and the status of status switch S ₃ , auxiliary equipment P ₂
While the operation of the motor valve MV1 is controlled, the opening degree of the motor valve _MV1 is controlled according to the temperature detected by the temperature sensor _T1 .

Figure 3 is a block diagram of the main controller MCT.
It is centered around a processor such as a microprocessor, CPU _n , fixed memory ROM _n , variable memory RAM _n ,
A transmission circuit TRX _n and an interface IF _n are arranged, and these are connected by a bus line BUS _n . A processor CPU _n executes instructions stored in advance in a fixed memory ROM _n , and the transmission circuit TRX _n
Data transmitted and received with the sub-controllers SCT ₁ to _{SCT n} and SCT ₀ via the interface IF _n and data transmitted and received with the terminal equipment TE via the interface IF n are accessed as necessary to the variable memory RAM _n .

FIG. 4 is a block diagram of the sub-controllers SCT ₁ to SCT _{n and} SCT ₀ , which, like the main controller MCT, center around the processor CPUs, fixed memory ROMs, variable memory RAMs, and transmission circuits TRXs ₁ and TRXs. ₂
are arranged around the periphery, and these are connected by bus BUSs, and based on instructions stored in fixed memory ROMs, the main controller MCT and each terminal controller TCT ₁₁ to TCT are connected via transmission circuits TRX ₁ and TRX ₂ . _no ,
Relays data transmission and reception with TCT _x while accessing variable memory RAMs for necessary data, or transmits monitoring information to variable memory
The data is transmitted while accessing RAMs.

Figure 5 is a block diagram of the terminal controller _TCT
ROMt, variable memory RAMt, transmission circuit TRXt, and interfaces IFt ₁ and IFt ₂ are arranged around the periphery, and these are connected by a bus BUSt. A write memory PROM is provided, which is connected to the bus line BUSt via a writer (write circuit) WRT for writing data, and data is accessed to the write memory PROM through this, and once written. The stored data is retained forever until it is erased by ultraviolet irradiation or electrical means.

In addition, the variable memory RAMt has a large capacity capacitor C _PS connected to the power supply +V side, so even if the main power supply fails, the variable memory RAMt will last approximately 48 hours.
The stored data is not deleted.
However, the same effect can be obtained even if a battery is used instead of the capacitor C _PS .

Note that the processor CPUt is a fixed memory ROMt.
Executes instructions stored in the controller, transmits and receives data to and from the sub-controllers SCT ₁ to _{SCT n} via the transmission circuit TRXt, and inputs digital data DI and analog data from each sensor and status switch via the interface IFt ₁ . AI reception and digital data output for each control part
Sends DO, analog data output AO,
The required data is accessed to the variable memory RAMt, but important data is fixedly stored in the write memory PROM via the writer WRT.
The processor CPUt makes control decisions based on the data DI and AI that indicate the detection power of each sensor and the status of the status switch, as well as the sent and received data, and then sends out the data outputs DO and AO as control outputs. It has become a thing.

In addition, a small and portable setting device PST with a keyboard and character display is connected to the connector CN via the interface IFT ₂ , and its operation allows the processor CPUt
responds to variable memory RAMt and write memory
The contents of the PROM can be displayed and data can be updated or newly stored in the PROM at will.

Figure 6 shows the processor of the terminal controller TCT _x .
This is a comprehensive flowchart showing the control operation by CPUt. After "START" by turning on the power or recovering from a power outage, "Initialize" the initial state settings, and then access the test data to the variable memory RAMt. and determine whether these accesses are normal or not, determine whether the set value data is stored in the variable memory RAMt, and determine whether the total number of bits of data stored in the variable memory RAMt is determined when the power is restored. "Self-judgment" is performed by determining whether or not it is the same as before the occurrence, and if YES in "Is there an abnormality?", write memory
After performing "abnormality countermeasure processing" such as transferring the contents of the PROM and newly storing it in the variable memory RAMt, "data transmission/reception" is performed to send and receive data from the sub-controllers SCT ₁ to
The main controller MCT is notified of the occurrence of an abnormality via the SCT _n , and the required data is received from the main controller MCT and stored in the variable memory RAMt.

If “Is there an abnormality?”
After storing to “time schedule control” described later,
Performs "level control,""upper/lower limit monitoring," pump control, "adjustment control," fire control, etc., and digital data output "DO transmission" and analog data output "AO transmission" according to these results. After getting older, check if there is a setting device PST using “PST check”
Judging by, if “PST is present?” is NO,
It immediately moves to “data transmission/reception”, but this
In response to YES, "PST processing" such as sending data to the setting device PST and storing data from the setting device PST is performed, and then "data transmission/reception" is performed.
Then, each necessary current data is transmitted, and the received data is stored in the variable memory RAMt, and the above operations are repeated.

FIG. 7 is a flowchart of “time schedule control” and “time schedule read/write”.
"Time check" _checks the usage start time ts stored as a weekly program in the variable memory RAMt.
and end-of-use time _te , and check whether they match the time measured by the clock configured inside the processor CPUt. If the result of this is YES for "ON time?", " If "ON time zone?" is NO, immediately perform "time flag reset".

Therefore, turning on the power to each pump of the main engine P ₁ and the catcher P ₂ is only allowed between the start time t _s and the end time _te of use.

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

FIG. 8 is a flowchart of "level control", and shows the demand level of predetermined importance for the terminal controller TCT _x , the power consumption status, the operating status of the emergency generator during a power outage, and A comparison is made with the command level determined according to the situation such as power failure recovery, and the own demand level is higher than the command level given from the monitoring sub-controller SCT ₀ to the sub-controllers SCT ₁ to SCT _o . If the level is low, the air conditioning equipment will stop operating.

Also, what are command level and demand level?
The conditions are divided into those depending on the power consumption situation, those when the power is restored after a power outage, and those during the generator operation, and the above-mentioned level comparison is performed for each condition.

In other words, in Figure 8, "Power outage?"
If NO, a level comparison is made according to the power consumption status using the "power command level power demand level", and if this is YES, the air conditioner's "level flag is reset if in operation" immediately.
On the other hand, when the "power command level power demand level" is NO, the "power failure recovery command level power failure recovery demand level" is used to compare the level at the time of power outage recovery after a power outage, and this YES If this is NO, check the time flag in Figure 7 and set the level to turn on the air conditioner by checking the time flag in Figure 7 with "Set the level flag if the air conditioner is running on a time schedule". Set flag.

In addition, when YES is selected for “Power outage?”, the level is compared during generator operation using the “generator command level generator demand level”, and when this is YES
"Reset the level flag if driving",
If this is NO, the process moves 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 complete?" becomes YES.

FIG. 9 is a flowchart of "upper and lower limit monitoring", in which the actual measured temperature value T _P is monitored, compared with the predetermined alarm upper limit T _HA and alarm lower limit T _LA , and then When the measured value T _P reaches these values, data indicating an alarm is sent to the main controller MCT.

In other words, if the "power ON?" of the air conditioner is YES, the "unstable period elapsed?" immediately after startup is
Assuming that the result is YES, the alarm upper limit value T _HA stored in the variable memory RAMt in advance
and the same lower limit value T _LA and temperature sensor T ₁ or T ₂
The measured value T _P is compared with “T _P T _HA ” and “T _P T _LA ”, and “alarm flag set” is performed by these YES, and “alarm flag is set” by data transmission to the main controller MCT. However, for these NOs, the alarm flag is reset and
Send a return message.

In addition, in Fig. 9, the actual measured temperature value T _P is targeted, but in addition, the pressure of each part of the air conditioning equipment,
It can also be applied to various required physical quantities such as flow rate.

Figure 10 is a flowchart of "pump control", and after checking the time flag according to "time schedule operation period?"
If YES, a "main engine flag set" is performed to start operation of the main engine _P1 assuming NO for "main engine in operation" and NO for "main engine failure?".

Also, if “Main engine running?” is YES, the main engine
“Has the specified time elapsed after changing the number of units?” including the activation of P ₁ ?
``Is the temperature difference large?'' is checked based on the detection power of temperature sensors T <sub>1</sub> and T <sub>2</sub> through YES of ``2 units in operation?'' and NO of ``Two units in operation?'' If this is YES,
Depending on the output of status switch S ₃ , check "Has the bypass valve been fully closed for more than a specified time?" If this is YES, the NO of "Auxiliary equipment failure?"
Assuming that, "auxiliary equipment flag set" is performed to start the operation of accessory equipment _P2 .

On the other hand, when the answer is YES to "Two units in operation?", "Is the temperature difference small?" is checked based on the detection power of temperature sensors T ₁ and T _2. If this is YES, "Auxiliary machine failure?" is checked. Assuming NO, perform "auxiliary equipment flag reset" and stop operation of auxiliary equipment _P2 .

However, if "Auxiliary equipment failure?" is YES, "Main engine flag reset" is executed via NO of "Main engine failure?"
The operation of main engine _P1 is stopped.

In addition, “Time schedule Yuru driving hours?”
If it becomes NO, the operation of the main engine _P1 and the auxiliary machine _P2 is stopped by "auxiliary machine flag reset" and "main machine flag reset".

The presence or absence of a failure in the main engine P ₁ and the auxiliary engine P ₂ is determined based on the discrepancy between the status of the main engine flag and the auxiliary engine flag and the status of the status switches S ₁ and S ₂ .

Although the above explanation has been made using two pumps, it is obvious that the operation of a plurality of pumps can be controlled in accordance with the temperature difference using a similar method.

After performing the above "pump control", the " _adjustment control" shown in FIG. This is done by controlling the motor MV ₁ so that the temperature is maintained within a predetermined range.

In addition, "fire control" is carried out, and when fire information is given from the monitoring sub-controller SCT ₀ , the operation of each air conditioning equipment is stopped, so a fire flag is immediately set. , the operation of main engines P ₁ and P ₂ is stopped by interrupt processing, and this state is maintained until information that the fire has ended is given.

Therefore, once 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 Figure 6, the actual control output is determined by the digital data output “DO sending” and the analog data output “AO sending”. In addition to being sent to each pump and motor valve MV ₁ of P ₁ and auxiliary machine P ₂ , data related to these decisions and data on the control status are
In addition to being edited in the sub-controllers SCT ₁ to SCT _n ,
Since it is transmitted and received between the main controller MCT and the terminal controller TCT _x , the main controller MCT always stores the latest control status in the data RAM _n , which can be confirmed by the terminal equipment TE.
The latest data given from the terminal equipment TE will be stored in the variable memory RAMt of the terminal controller TCT _x .

On the other hand, by linking the time schedule with upper and lower limit monitoring and level control, it is possible to reliably perform local pump operation control according to the time zone according to the overall energy saving and control situation as desired conditions. By controlling the number of vehicles, the maximum number of vehicles in operation can be determined optimally based on the relationship with the time schedule.

Note that these control conditions can be changed at the site using a setting device, and the control conditions can be arbitrarily set according to local conditions.

However, the terminal controller TCT _x stores the basic control data in variable memory RAMt and write memory.
Because it is stored in PROM, the main controller MCT, sub controllers SCT ₁ to SCT _n , and each transmission line La, Lb ₁ to
Even if any or all of Lb _n fails, the unique operation of the terminal controller TCT _x ensures local control of each pump and motor valve without any hindrance.

In addition, the main controller MCT and the sub controllers SCT ₁ to SCT _n
are connected by a common transmission path La, and the sub controllers SCT ₁ to SCT _n and each terminal controller TCT ₁₁ to
Between TCT _no and TCT _x , each individual transmission line Lb ₁ ~
Since it is connected by Lbm, the sub controller SCT ₁ ~
If SCT _n is installed in the vicinity of each group _of terminal controllers TCT ₁₁ to TCT _{no and TCT} Since it is only necessary to provide a sub-controller SCT and a sub-controller SCT, it is extremely easy to change the overall configuration.

Note that since the decision function for control is distributed to the terminal controller TCT _x , 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. Depending on the scale of the device configuration, the sub-controllers SCT ₁ to _{SCT n} may be omitted. The present invention can be freely modified in various ways, such as using a dedicated control circuit that is a combination of various logic circuits instead of using a processor as the control section.

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. is locally limited, reduces the amount of wiring and wiring man-hours, makes it easy to add or change the entire configuration, and facilitates various local control conditions mainly for pumps. By being quick and effective, remarkable effects can be obtained in air conditioning control devices for various uses.

[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 block diagram showing the connection status between the terminal controller and the outside according to the invention, and Fig. 3 is a block diagram of the main controller. Figure 4 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 situation by the control unit, and Figure 7 is a flowchart of time schedule control. Chart: Figure 8 is a flowchart for level control; Figure 9 is a flowchart for upper and lower limit monitoring;
Figure 0 is a flowchart of pump control. MCT……Main controller, TCT ₁₁ ~ TCT _no , TCT _x
...Terminal controller, P ₁ ... Main engine, P ₂ ... Auxiliary equipment, T ₁ ,
T ₂ ... Temperature sensor, MV ₁ ... Motor valve, S ₁ ~ _{S 2}
...Status switch, Wf...Water supply, Wr...
... Kansui.

Claims (1)

[Claims] 1 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. , a fixed memory that stores instructions, a variable memory that accesses data, a clock function, and a time period in which the air conditioner is allowed to be powered on based on a time schedule predetermined by the time measured by the clock function. upper and lower limit monitoring control means for sending out an alarm when the actual measured value is either above the alarm upper limit or below the alarm lower limit; and an air conditioning pump based on the predetermined time schedule. a time schedule control means for determining a time period during which power is allowed to be turned on; and a level for stopping the operation of the pump when a demand level corresponding to the importance of the target equipment is lower than a given command level. A control means, a number control means for operating a plurality of pumps in accordance with the load request, an adjustment control means for varying the valve opening degree of external heat source water according to the temperature of water supply, and settings connected as necessary. A terminal controller comprising: control means for displaying the contents of the variable memory and updating data in the variable memory according to the operation of the terminal controller.