JP3277323B2 - Heat source equipment control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat source device control device for controlling the number of operating heat source devices according to load conditions.

[0002]

2. Description of the Related Art FIG. 11 shows an instrumentation diagram of an operation number control system for controlling the number of operating refrigerators. In the figure, 1
-1 to 1-5 are refrigerators, 2-1 to 2-5 are refrigerators 1-1
Pumps as accessories of 1-5, 3 and 4 are headers,
5 is a load device such as a fan coil unit, 6 is an outgoing water line, 7 is a return water line, and 8 is a temperature T1 of incoming water to the load device 5.
9 is the temperature T of the return water from the load equipment 5.
2, a thermometer for detecting the flow rate Q of the return water, a bypass line 11 for bypassing between the header 3 and the header 4, and a bypass line 12 provided on the way of the bypass line 11. A valve 13 is a differential pressure gauge for detecting a differential pressure between the header 3 and the header 4, and 14 is a control device.

In this system for controlling the number of operating units, outgoing water pumped by the pumps 2-1 to 2-5 is supplied to the refrigerator 1-
The feed water is supplied from the outgoing water line 6 via the header 3 to the header 4 via the load device 5 and returned to the header 4 via the return water line 7 via the load device 5, and is again pumped by the pumps 2-1 to 2-5. Circulate through the above paths. The controller 14 gives an opening degree command to the bypass valve 12 according to the measurement value from the differential pressure gauge 13 to control the water supply pressure of the outflow water, while controlling the outflow water temperature T1 from the thermometer 8 and the outflow water temperature from the thermometer 9. From the return water temperature T2 and the flow rate Q of the return water from the flow meter 10, Q × (T2-T
As 1), the current heat load W is obtained (W = Q × (T2−
T1)), the refrigerator 1-1 according to the current load heat amount W
1-5 are controlled.

In this case, the control device 14
An operation sequence table TA and a device capacity table TB are set as shown in (a) and (b), and the minimum number of units satisfying the current load heat amount W is determined from the operation sequence table TA and the device capability table TB. Determine the combination of operating devices.
That is, as shown in FIG. 12C, the control device 14 controls the device N until the heat load W reaches 500 refrigeration tons (RT).
O. Select and specify the refrigerator 1-1 corresponding to 1 and
Device No. up to RT. Refrigerator 1-1 corresponding to 1, 2
1-2 is selected and designated.
Refrigerators 1-1, 1-2, and 1-3 corresponding to 1, 2, and 3 are selected and designated. 1,2,
Refrigerators 1-1, 1-2, 1-3, 1 corresponding to 3, 4
4 and select and specify the device number up to 1900RT. 1,
Refrigerators 1-1, 1-2,1- corresponding to 2,3,4,5
3, 1-4, 1-5 is selected and designated, and the selected and designated refrigerator 1 is started.

[0005]

However, in the conventional system for controlling the number of operating units, the control unit 14 is provided with only one operation order table TA. That is, when FIG. 12C is an operation specification table of the refrigerators 1-1 to 1-5, only one operation specification table has been determined. In recent years, systems are often configured by mixing different types of refrigerators for the purpose of dispersing energy in order to respond to chlorofluorocarbons and lifeline down. Is season, time zone, cooling / heating, load (more / less)
It fluctuates by such factors. Refrigerators using chlorofluorocarbon, which have been frequently used in the past, tend to be eliminated in order to protect the global environment, and refrigeration units that do not use chlorofluorocarbons tend to increase. In the conventional system, since only one operation designation table is determined as described above, it has not been possible to guarantee that the overall operation cost is always optimal.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a heat source device control device capable of always guaranteeing optimum operation in terms of operating costs and the like. It is in.

[0007]

According to the present invention , a heat source device corresponding to a current load condition is selected and designated as an operating device according to a preset table. In the heat source device control device that activates the selected heat source device and stops the heat source device that is not selected, a setting table is set for each predetermined operation mode, and a table corresponding to the current operation mode is selected from these tables. Then, according to the selected table, the heat source device according to the current load condition is selected and designated as the operating device , and when the table is switched,
The allowable amount of excess heat supply for the current load condition.
Is selected and specified so as not to exceed this tolerance.
Starting the heat source equipment sequentially and heat source equipment out of the selection specification
Are sequentially stopped . According to the present invention, various operation modes are determined by a combination of a season, a time zone, cooling / heating, a load (more / less), and an operation sequence table is set for each operation mode. For example, the operation sequence table corresponding to the current operation mode is selected from these operation sequence tables, and the heat source device corresponding to the current load condition is operated by referring to the device capability table according to the selected operation sequence table. Selected as a device. Also, the current operation mode changes.
For example, the operation sequence table is switched as a table
The excess heat supply to current load conditions
Do not exceed the allowable value.
Heat source equipment that has not been selected and started sequentially
The vessels are sequentially stopped.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments. FIG. 2 shows a block diagram of a control device according to the present invention. This control device 14 'is used in place of the control device 14 of the operating number control system shown in FIG.

A control device 14 'is mainly composed of a processor CPU such as a microprocessor, and has a fixed memory ROM, a variable memory RAM, and interfaces I / F1 to IF / IF.
7 are connected to each other by a bus BUS, and are controlled by the processor CPU while accessing necessary data to the variable memory RAM based on an instruction stored in the fixed memory ROM. The operation is to be performed.

A terminal device TE having a keyboard, a printer, and the like is connected to the interface I / F1 so that a dialog with the control device 14 'can be freely performed. The outgoing water temperature T1, the return water temperature T2, and the flow rate Q are provided as data DI indicating the current load condition, and an operation mode signal MI indicating the current operation mode (day mode or night mode in this embodiment). It has become something.

The control output of the controller 14 'is transmitted to the refrigerator 1-1 via the interfaces I / F3 to I / F7.
To 1-5 (R1 to R5), whereby the operating conditions of the refrigerators 1-1 to 1-5 are controlled. Also, from the terminal device TE, a daytime operation sequence table TA1 and a nighttime operation sequence table TA2 as shown in FIGS. 3A and 3B and a device capability table TB as shown in FIG. And these are stored in the variable memory RAM. In addition, a surplus water amount described later is given from the terminal device TE, and this is stored in the variable memory RAM. The operation sequence tables TA1, TA
2. The equipment capacity table TB and the amount of excess water may be given from a remote place such as a central monitoring device.

FIG. 1 is a functional block diagram of the control device 14 '. The control device 14 'determines the current operation mode from the operation sequence table storage unit 14-1 storing the supplied operation sequence tables TA1 and TA2 and the supplied operation mode signal MI. The current load heat amount W (W) is selected from the table selection unit 14-2 that selects the order table TA1 and the operation order table TA2 in the case of the night mode, and the supplied outgoing water temperature T1, return water temperature T2, and flow rate Q. = Q × (T2−T1)).

The controller 14 'receives the current load calorie W from the load calorie calculator 14-3 and normally outputs the current load calorie W from the load calorie calculator 14-3. While the switching of the operation order tables TA1 / TA2 is being executed by the table selection unit 14-2, the load calorie calculation unit 1
4-3, a load heat amount holding unit 14-4 that holds and outputs the current load heat amount W, an equipment capacity table storage unit 14-5 that stores a provided equipment capacity table TB, and a table selection unit 14-. Operation sequence table TA1 / selected in 2
TA2 and the device capability table T from the device capability table storage unit 14-5
B, the combination of the minimum number of operating devices that satisfies the current load calorie W from the load calorie holding unit 14-4 is determined, that is, the refrigerator to be operated from the refrigerators 1-1 to 1-5. And a number control operation unit 14-6 for selecting and specifying the result and outputting the result of the selection and specification. In addition, the number control operation unit 14-6 operates the operation order table TA1 / TA.
During execution of the switching of 2, the output (selection designation result) is held.

Further, the control device 14 'includes a flow-heat conversion unit 14-7 for obtaining the allowable value Wov by multiplying a predetermined coefficient over the amount of water is granted, operating equipment from units control arithmetic unit 14-6 From the selection designation result and the flow rate / heat quantity conversion unit 14-7
And a the allowable value Wov, when switching the execution of the operation sequence table TA1 / TA2 in the table selecting unit 14-2, an excess amount Wsv of heat supplied for the current heat load (hold value) W exceeds the allowable value Wov And an overlap processing unit 14-8 for sequentially starting the selected and designated refrigerators and sequentially stopping the refrigerators not selected.

FIG. 4 is a flowchart for explaining a switching sequence in the control device 14 '. Table selector 14
In step -2, the current operation mode is determined from the operation mode signal MI, and it is determined whether there is an operation order switching request (step 401). That is, it is checked whether the operation mode signal MI has been switched from the day mode to the night mode or from the night mode to the day mode.

When the mode is switched from the day mode to the night mode, the operation sequence table TA2 is replaced with the operation sequence table TA2 from the operation sequence table storage unit 14-1.
Select When switching from the night mode to the day mode, the operation sequence table TA1 is replaced with the operation sequence table TA1 from the operation sequence table storage unit 14-1.
Is selected (step 402).

The number control calculation unit 14-6 calculates an operation order table TA1 / TA2 from the table selection unit 14-2 and a device capability table TB from the device capability table storage unit 14-5.
A combination of the minimum number of operating devices that satisfies the current load heat amount W from the load heat amount holding unit 14-4 is determined, and the result (operating device selection designation result) is overlapped.
The output is sent to the processing section 14-8 (step 402).

When there is an operation order switching request, the load calorie holding unit 14-4 holds the load calorie W from the load calorie computing unit 14-3 to the number control computing unit 14-6, and carries out the unit control computation. The unit 14-6 is an overlap processing unit 14.
The result of the selection of the operating device at -8 is held (step 402). During switching, outgoing water temperature T1 and return water temperature T2
Since the measured values such as the flow rate Q are significantly different from those in the steady state and have low reliability, the load heat amount W at the start of switching is used as the current load heat amount W until the switching process is completed, and the operating equipment determined at the start of switching is determined. The selection designation result is used as the selection designation result of the operating device according to the current load heat amount W.

[Switching from Night Mode to Day Mode] At the time of switching from night mode to day mode, the unit control calculation unit 14-6 uses the operation order table TA1 and the equipment capacity table TB.
Then, a combination of the minimum number of operating devices that satisfies the current load heat amount W is determined. That is, as shown in FIG. 5A, the unit number control calculation unit 14-6 determines the device number until the load heat amount W reaches 500RT. Refrigerator 1-1 corresponding to 1
Is selected and the device number is set up to 1000RT. Select and specify the refrigerators 1-1 and 1-2 corresponding to 1 and 2, and 1300
Device No. up to RT. Refrigerator 1 corresponding to 1, 2, 3
1, 1-2 and 1-3 are selected and designated. Refrigerator 1-1, 1 corresponding to 1, 2, 3, 4
-2, 1-3 and 1-4 are selected and specified. Refrigerator 1 corresponding to 1,2,3,4,5
1, 1-2, 1-3, 1-4 and 1-5 are selected and designated, and the result of the selection is given to the overlap processing unit 14-8.

[Switching from Day Mode to Night Mode] At the time of switching from day mode to night mode, the unit control calculation unit 14-6 uses the operation order table TA2 and the equipment capacity table TB.
Then, a combination of the minimum number of operating devices that satisfies the current load heat amount W is determined. That is, as shown in FIG. 5B, the unit number control calculation unit 14-6 sets the device NO. Refrigerator 1-5 corresponding to 5
And specify the device number up to 600RT. Select and specify the refrigerators 1-5, 1-4 corresponding to 5,4, 900RT
Until the device No. Refrigerators 1-5 corresponding to 5, 4, and 3
1-4 and 1-3 are selected and designated. Refrigerators 1-5,1- corresponding to 5,4,3,2
4, 1-3, and 1-2, and the device number is set up to 1900RT. Refrigerator 1 corresponding to 5, 4, 3, 2, 1
5, 1-4, 1-3, 1-2 and 1-1 are selected and designated, and the result of the selection designation is given to the overlap processing unit 14-8.

With respect to fluctuations in the operating cost of the refrigerator, for example, in the case of an electric refrigerator, there is a large difference between the daytime and nighttime electricity rates, and the nighttime rate is one quarter of the daytime rate.
It is about. Therefore, for example, when the system is composed of an electric refrigerator and a gas refrigerator, the gas refrigerator is preferentially operated in the daytime and the electric refrigerator is operated at night. If this is the case, the operating costs will be advantageous.
In addition, since the operating efficiency of a refrigerator becomes better as the load is closer to the capacity of the refrigerator, operating the refrigerator with a small capacity at high capacity is more advantageous than operating the refrigerator with a large capacity at low capacity. become.

In this embodiment, FIG. 5A shows a day operation designation table TC1 and FIG. 5B shows a night operation designation table TC.
In the case of 2, the operation designation table TC1 is used in the daytime and the operation designation table TC2 is used in the nighttime, so that optimal operation can be guaranteed in the daytime and the nighttime.

In this embodiment, a combination of operating devices as shown in an operation designation table TC1 is calculated by using an operation sequence table TA1 and a device capability table TB.
A combination of operating devices as shown in the operation designation table TC2 is obtained by calculation from the operation sequence table TA2 and the device capability table TB. However, the operation designation tables TC1 and TC2 are set as operation designation tables in the variable memory RAM. Alternatively, a combination of operating devices may be directly obtained from the operation specification tables TC1 and TC2. The operation order tables TA1 and TA2 and the operation designation tables TC1 and TC2 may be configured so that the settings can be changed by communication from a central monitoring device or the like. Operation order tables TA1, TA2 and operation designation tables TC1, TC2
In the method using, one of them is not used. Therefore, the contents of the unused table can be freely rewritten during the control operation without disturbing the control operation.

Further, in this embodiment, only the daytime operation order table TA1 and the nighttime operation order table TA2 are set. However, the operation order table may be provided by further dividing the time zone into smaller ones. Various operation modes are set by the combination of season, time zone, cooling / heating, load (more / less), etc., and an appropriate operation order table is set for each set operation mode to reduce operating costs. In terms of operation, optimal operation can always be guaranteed. The same applies to the case where an operation designation table is used.

[Overlap Processing] The overlap processing section 14-8 includes a number control operation section 14-
Of operation equipment selection from 6 and flow rate / heat quantity conversion unit 1
The allowable value Wov from 4-7 as input, when switching of the operation sequence table TA1 / TA2, excess amount Wsv of heat supplied for the current heat load (hold value) W exceeds the allowed <br/> capacity value Wov In order to prevent such a situation, the selected refrigerators are sequentially started and the refrigerators not selected are sequentially stopped.

For example, it is now assumed that the operation order table TA1 is used, and the current load heat amount W obtained by the load heat amount calculation unit 14-3 is 800 RT. In this case, as can be seen from the operation designation table TC1 in FIG. 5A, the refrigerators 1-1 and 1-2 are in the operating state.

Here, it is assumed that the operation sequence table has been switched to TA2 by the operation mode signal MI. In this case, since the current load heat amount W is 800 RT, FIG.
As can be seen from the operation designation table TC2 of FIG.
5, 1-4 and 1-3 are selected and designated as operating devices.

In this case, it is conceivable that the refrigerators 1-1 and 1-2 are stopped at the same time and the refrigerators 1-3, 1-4 and 1-5 are started immediately. However, in this method, the refrigerator 1
Even when -1 and 1-2 are stopped, the pumps 2-1 and 2-2, which are auxiliary machines, do not stop immediately (residual operation). For this reason, if the refrigerators 1-3, 1-4, and 1-5 are immediately started alternately, the supplied heat amount greatly exceeds the current load heat amount of 800RT.

On the other hand, the refrigerators 1-1 and 1-2 are simultaneously stopped, and after waiting for a time until the pumps 2-1 and 2-2 are stopped, the refrigerators 1-3 and 1-4 are stopped. It is conceivable to start 1-5 simultaneously. However, in this method, since it is necessary to wait until the pumps 2-1 and 2-2 stop, the time required for switching the refrigerator is long. In addition, for a long time, the capacity becomes insufficient for the required load heat amount of 800 RT, and the air conditioning control cannot be properly performed.

On the other hand, in the present embodiment, the refrigerators 1-3, 1-4, 1-5 selected and designated as operating equipment are sequentially activated, and the refrigerators 1-1, 1-1-1 which are not selected and designated.
Since the sequential stop of No. 2 is performed as follows, there is no problem such as a large excess of supplied heat and a shortage of capacity as described above.

FIG. 6 is a time chart for explaining the overlap processing operation in the overlap processing section 14-8. In the figure, (a) shows the operating status of the refrigerator 1-1 and the pump 2-1, (b) shows the operating status of the refrigerator 1-2 and the pump 2-2, and (c) shows the refrigerator 1-3 and the pump 2-1. (D) shows the operation status of the refrigerator 1-4 and the pump 2-4, (e) shows the operation status of the refrigerator 1-5 and the pump 2-5, and (f) shows the refrigeration. Machine 1-1 to 1-5
Shows the total amount of heat supplied from.

Now, as an actual example, the flow rate / heat quantity conversion unit 14-
Tolerances Wov from 7 to as being set as 500RT. In the state before the operation order table is switched from TA1 to TA2, the overlap processing unit 14-8
Is the operating state of the refrigerators 1-1 and 1-2, and the refrigerators 1-3 and
1-4 and 1-5 are in a stopped state (period T1 shown in FIG. 6). In this case, the pumps 2-1 and 2-2, which are auxiliary machines of the refrigerators 1-1 and 1-2, are in the operating state, and the refrigerators 1-3 and 1-2-1.
Pumps 2-3, 2-4, 2-5, which are auxiliary equipments of 4, 1-5
Has been stopped.

FIG. 7 shows an operation state during the period T1. In FIG. 7, the refrigerator and the pump in the operating state are indicated by oblique lines. Since each of the refrigerators 1-1 and 1-2 has 500 RT, the refrigerating capacity is 1000 RT in total. In this case, by adjusting the bypass valve 12, 200 RT flows into the bypass pipe 11, and 800 RT is supplied to the load device 5. The bypass pipe 12 has a maximum of 500R.
T flow is possible.

It is assumed that the operation order table is switched from TA1 to TA2 at time t1 from such a state.
Then, the overlap processing unit 14-8 checks whether or not there is a currently stopped device among the devices to be operated after the change (step 403 shown in FIG. 4). In this case, the post-change operation scheduled devices are the refrigerators 1-3, 1-4, and 1-5, all of which are in a stopped state. For this reason, the process proceeds to step 404 in response to YES in step 403, and when the highest-ranking device to be stopped during operation is started, it is checked whether or not the device is in the simultaneous operable capacity range.

In this case, in step 404, the refrigerator 1-5 is selected as the highest order of the equipment scheduled to be operated during stoppage, and the sum of the refrigerating capacities of the refrigerators 1-1 and 1-2 is 1
000RT and 300RT which is the refrigerating capacity of refrigerator 1-5
Adding bets, determine the excess amount Wsv of heat supplied to the current heat load by subtracting the 800RT is the current heat load from the a sum value 1300RT, allowable that is set to an excess Wsv of the amount of heat supplied Compare with the value Wov. In this case, the excess amount Wsv of the supplied heat amount is 500 RT
Next, allowable value Wov (= 500RT) since become less (Wsv ≦ Wov), the process proceeds to step 405.

In step 405, the equipment with the highest starting priority is selected from among the equipment scheduled to be stopped during operation, and the selected refrigerator, ie, the refrigerator 1-5 is started (point t1 shown in FIG. 6 (f)) . ). The pump 2-5, which is an auxiliary machine, is also started at the same time as the start of the refrigerator 1-5. Next, step 403
Then, it is checked whether there is a currently stopped device among the devices to be operated after the change. In this case, the devices to be operated after the change are the refrigerators 1-3, 1-4, 1-5, and the refrigerators 1-3, 1-5.
-4 is in a stopped state. Therefore, in step 403, Y
Proceeding to step 404 according to the ES, if the highest-ranked one of the devices scheduled to be stopped during operation is started, it is checked whether or not it is within the simultaneous operable capacity range.

In this case, in step 404, the refrigerator 1-4 is selected as the highest order of the equipment scheduled to be operated during stoppage, and the sum of the refrigerating capacities of the refrigerators 1-1, 1-2 and 1-5 is selected. 1300RT and the refrigerating capacity of the refrigerator 1-4 are 3
Adding the 00RT, calculated the excess amount Wsv of heat supplied to the current heat load by subtracting the 800RT is the current heat load from the a sum value 1600RT, it is configured to an excess Wsv of the amount of heat supplied Huh Value Wov
Compare with In this case, the excess amount Wsv of the supplied heat amount is 8
00RT next, since the allowable value Wov (= 500RT) or (Wsv> Wov), the process proceeds to step 406.

In step 406, the device having the highest stop priority, that is, the device having the lowest start priority among the devices to be stopped is stopped. In this case, the refrigerator 1-1 is stopped based on the highest stop priority among the devices to be stopped (point t1 shown in FIG. 6A). With the stop of the refrigerator 1-1, the pump 2-1 which is an auxiliary machine is also stopped.
The refrigerator 1-1 stops first, and the pump 2-1 stops after performing the residual operation. Then, it is confirmed that the pump 2-1 has stopped, or that the scheduled stop time of the pump 2-1 has passed (step 407).
Return to step 403.

FIG. 8 shows an operation state during the period T2.
In the period T2, the refrigerators 1-2 and 1-5 and the pump 2-
1, 2, and 2-5 are set to the operating state. Refrigerator 1-2
Is 500RT, refrigerator 1-5 is 300RT, refrigerator 1-
1 is stopped but the pump 2-1 is running, so that the total refrigerating capacity is 1300 RT. In this case, by adjusting the bypass valve 12, 500 RT becomes the bypass line 1.
1 and the load device 5 is supplied with 800 RT.

In step 403, it is checked whether or not there is a currently stopped device among the devices to be operated after the change. in this case,
The devices to be operated after the change are the refrigerators 1-3, 1-4, 1-5, and the refrigerators 1-3, 1-4 are in a stopped state. For this reason, the process proceeds to step 404 in response to YES in step 403, and when the highest-ranking device to be stopped during operation is started, it is checked whether or not the device is in the simultaneous operable capacity range.

In this case, in step 404, the refrigerator 1-4 is selected as the highest order of the equipment scheduled to be stopped during operation, and the sum of the refrigerating capacities of the refrigerators 1-2 and 1-5 is 8
00RT and 300RT which is the refrigerating capacity of the refrigerator 1-4 are added, and 800RT which is the present load heat amount is subtracted from 1100RT which is the added value to obtain the excess amount Wsv of the supply heat amount with respect to the present load heat amount. comparing the allowable value Wov excess amount Wsv supply heat and it is configured. In this case, excess amount Wsv of supplied heat quantity becomes <br/> and 300RT, since the allowable value Wov (= 500RT) below,
Proceed to step 405.

In step 405, the equipment having the highest starting priority is selected from among the equipment scheduled to be stopped during operation, and the selected refrigerator, ie, the refrigerator 1-4 is started (point t2 shown in FIG. 6D). ). At the same time as the start of the refrigerator 1-4, the pump 2-4 as an auxiliary machine is also started. Next, step 403
Then, it is checked whether there is a currently stopped device among the devices to be operated after the change. In this case, the post-change operation scheduled devices are the refrigerators 1-3, 1-4, and 1-5, and the refrigerator 1-3 is in the stopped state. For this reason, the process proceeds to step 404 in response to YES in step 403, and when the highest-ranking device to be stopped during operation is started, it is checked whether or not the device is in the simultaneous operable capacity range.

In this case, in step 404, the refrigerator 1-3 is selected as the highest order of the equipment scheduled to be operated during stoppage, and the sum of the refrigerating capacities of the refrigerators 1-2, 1-4, 1-5 is selected. 1100RT and the refrigerating capacity of the refrigerator 1-3 are 3
00RT is added, and the current load heat amount, 800RT, is subtracted from the added value, 1400RT, to obtain an excess amount Wsv of the supply heat amount with respect to the current load heat amount. The excess amount Wsv of the supply heat amount is set. Value Wov
Compare with In this case, the excess amount of supplied heat Wsv is 6
00RT, which is equal to or greater than the allowable value Wov (= 500RT).

In step 406, the refrigerator 1-2 is stopped (point t2 shown in FIG. 6B), assuming that the stop priority is the highest among the devices to be stopped. With the stop of the refrigerator 1-2, the pump 2-2 which is an auxiliary machine is also stopped,
The refrigerator 1-2 is stopped first, and the pump 2-12 is stopped after performing the residual operation. Then, it is confirmed that the pump 2-2 has stopped, or that the scheduled stop time of the pump 2-2 has passed (step 407).
Return to step 403.

FIG. 9 shows an operation state during the period T3.
In the period T3, the refrigerators 1-4 and 1-5 and the pump 2-
2, 2-4 and 2-5 are set to the operating state. Refrigerator 1
4, 1-5 are 300RT, and the refrigerator 1-2 is stopped, but the pump 2-2 is operating, so that the total is 1100RT.
Refrigeration capacity. In this case, by adjusting the bypass valve 12, 300 RT flows through the bypass pipe 11, and 800 RT is supplied to the load device 5.

In step 403, it is checked whether there is any currently stopped device among the devices to be operated after the change. in this case,
The devices to be operated after the change are the refrigerators 1-3, 1-4, 1-5, and the refrigerator 1-3 is in a stopped state. For this reason, the process proceeds to step 404 in response to YES in step 403, and when the highest-ranking device to be stopped during operation is started, it is checked whether or not the device is in the simultaneous operable capacity range.

In this case, in step 404, the refrigerator 1-3 is selected as the highest order of the equipment scheduled to be operated during stoppage, and the sum of the refrigerating capacities of the refrigerators 1-4 and 1-5 is 6
00RT and the refrigerating ability of the refrigerator 1-3, 300RT, are added, and the current load heat, 800RT, is subtracted from the added value, 900RT, to obtain an excess amount Wsv of the supply heat to the current load heat. comparing the allowable value Wov excess amount Wsv supply heat and it is configured. In this case, excess amount Wsv of supplied heat quantity becomes <br/> and 100RT, since the allowable value Wov (= 500RT) below,
Proceed to step 405.

In step 405, the equipment with the highest starting priority is selected from the equipment scheduled to be operated during stoppage, and the selected refrigerator, ie, the refrigerator 1-3 is started (point t3 shown in FIG. 6C). ). At the same time as the start of the refrigerator 1-3, the pump 2-3 as an auxiliary machine is also started. Next, step 403
Then, it is checked whether there is a currently stopped device among the devices to be operated after the change. In this case, there is no currently stopped device in the device to be operated after the change, and a hold release command (information of switching end) is sent to the load calorie holding unit 14-4 (step 40).
8) End a series of overlap processing operations. The load calorie holding unit 14-4 includes an overlap processing unit 14-8.
Receiving the hold release command from the
The output hold of the current load calorie W to -6 is released.
Further, upon receiving the hold release command via the overlap processing unit 14-8, the number control calculation unit 14-6 releases the output hold of the selection result of the operating device to the overlap processing unit 14-8.

FIG. 10 shows an operation state during the period T4. In the period T4, the refrigerators 1-3, 1-4, 1-5 and the pumps 2-3, 2-4, 2-5 are in an operating state, and the refrigerators 1-1, 1-2 and the pumps 2-1 and 1-2 are operated. 2-2 is set to the operation stop state. Refrigerator 1-3, 1-4, 1-5 is 30
Since it is 0RT, the refrigerating capacity is 900RT in total. In this case, by adjusting the bypass valve 12, 100
RT is passed through the bypass line 11 and 80 is supplied to the load device 5.
0RT is supplied.

[0050] Thus, in this embodiment, the excess amount Wsv is allowable value Wo of heat supplied to the current heat load W
v so that the refrigerators selected and designated as operating equipment are sequentially started and the refrigerators that are not selected are sequentially stopped. Problem does not occur, the time required for switching the refrigerator can be shortened,
Air conditioning control can be appropriately performed even during switching.

In the above-described embodiment, the description has been given as an example of application to the number-of-operated-operations control system using a refrigerator as a heat source device. However, it goes without saying that the heat source device is not limited to the refrigerator. Further, in the above-described embodiment, the bypass valve 12 is provided in the bypass pipe 11, but it is not always necessary to provide the bypass valve.

[0052]

According to apparent the present invention since it has been described in the foregoing, seasonal, time zone, defined cooling / heating, the various operating modes by a combination of such load (generous / fewer), the operation For example, if an operation sequence table is set for each mode, the operation sequence table corresponding to the current operation mode is selected from these operation sequence tables, and the device capability table is referred to according to the selected operation sequence table. By doing so, the heat source device according to the current load condition is selected and designated as the operating device, and it is possible to always guarantee optimal operation in terms of operating costs and the like. Further, changes the current operation mode, when switched, for example, the operation sequence table as a table, the excess amount of heat supplied to the current load conditions so as not to exceed the allowable value, the heat source device designated selected as the operating device The heat source devices that are sequentially activated and deselected are sequentially stopped, so that problems such as a large excess of supplied heat and a shortage of capacity do not occur, and the time required for switching the heat source devices can be reduced. In addition, the air conditioning control can be appropriately performed even during the switching.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a control device shown in FIG.

FIG. 2 is a block diagram of a control device according to the present invention.

FIG. 3 is a diagram showing a daytime operation sequence table, a nighttime operation sequence table, and a device capability table used in the control device.

FIG. 4 is a flowchart illustrating a switching sequence in the control device.

FIG. 5 is a diagram showing a daytime operation designation table and a nighttime operation designation table which are substantially used in the control device.

FIG. 6 is a time chart for explaining an overlap processing operation in an overlap processing unit in the control device.

FIG. 7 is a diagram showing an operation state during a period T1 in the time chart.

FIG. 8 is a diagram showing an operation state during a period T2 in the time chart.

FIG. 9 is a diagram showing an operation state during a period T3 in the time chart.

FIG. 10 is a diagram showing an operation state during a period T4 in the time chart.

FIG. 11 is an instrumentation diagram of an operating number control system for controlling the number of operating refrigerators.

FIG. 12 is a diagram showing a conventional operation sequence table, a device capability table, and an operation designation table that are substantially used in the control device of the operating number control system.

[Explanation of symbols]

1-1 to 1-5 ... refrigerator, 2-1 to 2-5 ... pump,
3, 4 header, 5 load equipment, 6 outgoing line, 7 return line, 8, 9 thermometer, 10 flow meter, 11 bypass line, 12 bypass valve, 13 differential pressure gauge .., 14 ′: control device, 14-1: operation sequence table storage unit, 14-2
... Table selection unit, 14-3 ... Load calorie calculation unit, 14-
4: Load calorie hold unit, 14-5: Equipment capacity table storage unit, 14-6: Number control operation unit, 14-7: Flow rate / heat amount conversion unit, 14-8: Overlap processing unit, TA1: Operation sequence table (Daytime), TA2: operation order table (for night), TB: equipment performance table, TC1: operation specification table (for day), TC2: operation specification table (for night).

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuyasu Hamada 2-12-19 Shibuya, Shibuya-ku, Tokyo Yamatake Honeywell Co., Ltd. (56) References JP-A-61-291860 (JP, A) 3-291439 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) F24F 11/02

Claims (1)

(57) [Claims] 1. A heat source device according to a current load condition is selected and designated as an operating device according to a table set in advance, and the selected and designated heat source device is activated, while a heat source device which is not selected and designated is stopped. In the heat source device control device, a table set for each predetermined operation mode, table selection means for selecting a table corresponding to the current operation mode from these tables, and a current table according to the table selected by the table selection means a driving device selection specifying means for selecting and designating heat source device in accordance with the load condition as the operation device, when switching of the table, the current load condition
The allowable value of the excess amount of heat supplied is determined, and this allowable value is
Start up the selected heat source equipment in order so as not to exceed
Operation and the sequential stop of the heat source
Means for controlling a heat source device.