JP2000018672A - Heat source instrument control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a trouble when a step increasing is required even when a detecting amount of load heat does not show the necessity of step increasing by a method wherein forced step increasing is effected when a present water sending temperature is under insufficient condition compared with the set value of forced step increasing temperature upon deciding forced step increasing effected before the deciding of step increasing or decreasing of the operating sets of heat source instruments. SOLUTION: Present operating sets are compared with the capable sets of step increasing (step 401) and when the present operating sets are smaller than the capable step increasing sets, whether a step increasing effect waiting time is elapsed or not after a previous step increase finishing time is checked (step 402). When the step increasing effect waiting time is elapsed, a water sending temperature TS is compared with a forced step increasing temperature set value (tsu) (step 403). In the case of a refrigerating machine, when the water sending temperature is higher than the set value of forced step increasing temperature or TS>tsu, the elapse of a predetermined time is waited (step 404) and the establishment of load deciding 2 is decided (step 405). According to the establishment of the load deciding 2, an alarm is outputted and a step decreasing position upon a step decreasing deciding based on the amount of a load heat is changed to effect forced step increasing treatment.

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 a load state.

[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 1-3 are refrigerators, 2-1 to 2-3 are pumps, 3 and 4 are headers, 5 is load equipment such as a fan coil unit, 6 is a water supply line, 7 is a return line, and 8 is a return line. A thermometer for detecting a temperature TS of water supplied to the load device 5, a thermometer 9 for detecting a temperature TR1 of the return water from the load device 5, a flow meter 10 for detecting a flow rate F of the return water, and a header 3 A bypass line for bypassing between the header and the header 4;
1, a bypass valve provided on the way 1, a differential pressure gauge 13 for detecting a differential pressure between the header 3 and the header 4, a control device (heat source device control device) 14, and a refrigerator 1-1 to 1-1- 3 is a thermometer for detecting the inlet temperature TR2 of the return water (heat source inlet temperature).

In this system for controlling the number of operating units, water supplied by pumps 2-1 to 2-3 is supplied to a refrigerator 1-
The water is supplied by the water supply line 6 via the header 3 via the 1-1 to 1-3, reaches the header 4 as the return water via the return device 7 via the load device 5, and is again pumped by the pumps 2-1 to 2-3. Circulate through the above paths. The control device 14 gives an opening command to the bypass valve 12 according to the measurement value from the differential pressure gauge 13 to control the water supply pressure, while the water supply temperature TS from the thermometer 8 and the return water from the thermometer 9. From the temperature TR1 and the flow rate F of the return water from the flow meter 10, F × (TR1-T
S), the current load heat quantity Q is obtained (Q = F × (TR1
-TS)), and the refrigerator 1-
The number of operating units 1-3 is controlled.

In this case, the control device 14
An operation sequence table TA and a device capacity table TB as shown in FIGS. 3A and 3B are set, and the minimum number of units satisfying the current load heat quantity Q is obtained from the operation sequence table TA and the device capability table TB. Determine the combination of operating devices.
That is, as shown in the operation designation table TC in FIG. 12C, the control device 14 sets the load Q to 500 refrigeration tons (RT).
Until the device No. Select and specify the refrigerator 1-1 corresponding to the device No. 1 and the device No. up to 1000RT. Refrigerators 1-1 and 1-2 corresponding to Nos. 1 and 2 are selected and designated. Refrigerator 1-1,1- corresponding to 1,2,3
2, 1-3 is selected and specified, and the selected and specified refrigerator is started.

In addition to controlling the number of operating units according to the load heat quantity Q, the control device 14
Of the refrigerators is controlled so that is within an allowable range (for example, 9 ° C. or more). For example, when the water supply temperature TS is set to 7 ° C., if the heat source inlet temperature TR2 is not 9 ° C. or more, the refrigerators 1-1 to 1-3 break down, or the protection function of the refrigerator itself operates and stops. I will. When the air conditioning load is small, the heat source inlet temperature TR2 may be 9 ° C. or less. Therefore, the step reduction is performed by controlling the number of operating units based on the heat source inlet temperature TR2, and the heat source inlet temperature TR2 becomes 9 ° C.
To be kept above.

In addition to controlling the number of operating units according to the load heat quantity Q, the control device 14 assumes that the load heat quantity Q is within a predetermined range (a step-up correction possible range) and controls the water supply temperature TS Is the step correction temperature setting value ts (for example, ts =
(7 ° C) so that the number of operating refrigerators is controlled.
That is, the load calorie Q is within the step-up correction possible range, and the water supply temperature TS is equal to or higher than the step-up correction temperature set value ts (TS> t
If s), step increase (step increase correction) is performed.

FIG. 13 shows a conventional operation number control operation.
First, as load determination 1, a step-down determination of the number of operating units based on the heat source inlet temperature is performed. That is, the heat source inlet temperature TR2 is equal to or less than the preset forced step-down temperature set value tx (TR
2 <tx) (step 201), and T
If R2 <tx, it is determined that the load determination 1 is satisfied (“Y” in step 202), and the step reduction process is performed (step 20).
3). If TR2 ≧ tx, it is determined that the load determination 1 has not been established, and the process proceeds to step 204.

In step 204, load determination 3
A step-down determination is performed based on the amount of load heat. That is, the current load heat quantity Q = F × (TR1-TS) is calculated from the water supply temperature TS, the return water temperature TR1, and the flow rate F, and the current load heat quantity Q is referred to as “(total rated equipment capacity during current operation−step-down step). (Scheduled functional capability) × (1−DIF) = QDIF ”. Here, DIF is a differential, and is set to a value of about 20%. If the current load heat quantity Q is smaller than QDIF (QDIF> Q), it is determined that the load determination 3 has been established (“Y” in step 205), and the step reduction process is performed. QD
If IF ≦ Q, it is determined that the load determination 3 has not been established, and the process proceeds to step 206.

In step 206, load determination 4
A step increase determination based on the load heat amount is performed. That is, the current load calorie Q and “the total rated equipment capacity during the current operation × (1 + HL)
MT) = QHLMT ”. Where HLMT
Is a high limit, which is a value slightly smaller than DIF (HLMT = DIF-α). If the current load heat quantity Q is larger than QHLMT (Q> QHLM
T), assuming that the load determination 4 has been established (“Y” in step 207), the step increase process is performed (step 208). Q ≦ Q
If it is HLMT, it is determined that the load determination 4 has not been established, and the process proceeds to step 209.

In step 209, as load determination 5,
A step-up correction determination is performed based on the load calorie and the water supply temperature.
That is, the current load calorie Q, “currently operating total rated equipment capacity × (1−LLMT) = QLLMT” and “currently operating total rated equipment capacity × (1 + HLMT) = QHLMT”
Is compared with the water supply temperature TS and the step-up correction temperature set value ts. Here, LLMT is a low limit, and has a value equal to HLMT (LLMT =
HLMT = DIF-α). QLLMT <Q
If <QHLMT (the area indicated by hatching in FIG. 10: step increase correction possible range) and TS> ts, it is determined that load determination 5 is satisfied (“Y” in step 210), and step increase processing is performed (step 208). ).

QLLMT <Q <QHLMT and TS>
If it is not ts, it is determined that the load determination 5 is not satisfied,
After confirming that the numerical control has not been completed (step 21)
1) Return to step 201. This load determination 5 (step increase correction determination) is performed because the capacity of the refrigerator always fluctuates due to the weather conditions of the outside air. In addition, in the load determination 5, since the step increase by the water supply temperature TS is merely an auxiliary,
The load heat quantity Q is fixed at a certain level (QLLMT <Q <Q) such that the unit control based on the load heat quantity Q is mainly operated.
HLMT), the step increase correction is not performed even if the water supply temperature condition is satisfied.

[0012]

However, in the conventional system for controlling the number of operating units, for example, when the refrigeration function exceeds the assumed capacity due to performance deterioration, the required heat quantity exceeds the actual generation capacity, and as a result, the water supply temperature increases. Rise, the air conditioner can not perform sufficient heat exchange,
As a result, there occurs a case where the measured heat consumption cannot reach a level sufficient to increase the number of steps without a temperature difference. Once in this situation, the amount of heat consumed will not increase,
Even if the water supply temperature rises, the next stage refrigerator will not start.
Such a situation also occurs when the start-up time of the refrigerator is long or when the air conditioner has been started before the start of the refrigerator.

[0013] For example, in FIG.
Each of 1-2 and 1-3 has a design capacity (rated equipment capacity) of 20
It is assumed that the refrigerating function of the refrigerator 1-1 started at the first unit is actually 120 RT, the air conditioning load is 150 RT, and the design water supply condition is 7 ° C. In this case, the measured load heat amount Q is 150 RT, and the rated device capability of the refrigerator 1-1 is 200 RT, so that the step increase by the load heat amount Q is not performed. At this time, the water supply temperature TS increases because the capacity is insufficient for 30 RT. However, the heat consumption Q
Does not fall within the range in which the water supply temperature can be corrected (if the water supply temperature TS rises too high, heat exchange does not occur, and even if there is a load, the measured caloric value on the chilled water side does not increase). Also, the next-stage refrigerator is not started additionally.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to reduce the performance of a heat source device so that its actual performance is significantly lower than the design capability or to start the heat source device. In some cases, such as when the air conditioner is started before the capacity is fully demonstrated, the detected heat load does not have to be enough to add a new heat source device, but it actually needs to be increased. An object of the present invention is to provide a heat source device control device that can be removed.

[0015]

In order to achieve the above object, a first invention (an invention according to claim 1) is directed to a heat source device control apparatus for controlling the number of operating heat source devices according to a load state. Increase / decrease stage determination means for determining the increase / decrease stage of the number of operating heat source devices based on the load heat quantity obtained from the water supply temperature, the return water temperature and the flow rate, and based on the water supply temperature prior to the increase / decrease stage determination by the increase / decrease stage determination means. A forced step-up determination means for performing a step-by-step determination and forcing the step-up of the number of operating heat source devices if the current water supply temperature is lower than the set value of the forced step-up temperature. According to the present invention, the forced step increase determination based on the water supply temperature is performed before the increase / decrease stage determination based on the load heat quantity obtained from the water supply temperature, the return water temperature, and the flow rate. In this forced step-up determination, if the current water supply temperature is lower than the forced step-up temperature set value (for the refrigerator: the water supply temperature is higher than the forced step-up temperature set value, for the water heater: the water supply temperature Is lower than the forced stepping temperature set value), the number of operating heat source devices is stepped up.

A second invention (an invention according to claim 2) is a heat source equipment control device for controlling the number of operating heat source equipment in accordance with a load state, wherein a step-down determination of the number of operating heat source equipment is performed based on a heat source inlet temperature. Step-down determining means for performing the step-down determination, and after the step-down determination by the step-down determining means, performs a forced step-up determination based on the water supply temperature. A forced step-up determining means for forcibly increasing the number of units, and a step of increasing or decreasing the number of operating heat source devices based on the load heat quantity obtained from the water supply temperature, the return water temperature and the flow rate after the forced step-up determination by the forced step-up determining means An increase / decrease stage determining means for making a determination and an increase / decrease determination unit for performing an increase correction determination based on the load calorie and the water supply temperature after the increase / decrease stage determination by the increase / decrease stage determination means are provided. According to the present invention, the step reduction determination (load determination 1) based on the heat source inlet temperature is performed as the first step, the forced step increase determination based on the water supply temperature is performed (load determination 2) as the second step, and the third step As a fourth step, an increase / decrease stage determination based on the load calorie obtained from the water supply temperature, the return water temperature and the flow rate (load determinations 3 and 4) is performed. As a fourth step, a stage increase correction determination based on the load calorie and the water supply temperature (load determination 5) is performed. Done. In the forced step-up determination of the second step, if the current water supply temperature is insufficient than the forced step-up temperature set value (in the case of a refrigerator: the water supply temperature is higher than the forced step-up temperature set value, in the case of a water heater : The water supply temperature is lower than the forced stage temperature setting value), and the number of operating heat source devices is forcibly increased.

The third invention (the invention according to claim 3) is the first invention.
In the second invention, when the forced step-up determining means performs the step-up operation, the step-down step of changing the normal step-down position in the increasing / decreasing step determining means from a position where the forced step-up is performed to a position lower by a predetermined value. A position changing means is provided. According to the present invention, when the forced step-up based on the water supply temperature is performed, the normal step-down position (Q
DIF) is changed to a position (QDIF ′) below a predetermined value from the position where the forced step-up is performed. A fourth invention (an invention according to claim 4) is the third invention, wherein, when the step is reduced during the forced step-up by the forced step-up determining means, the step-down position changed by the increasing / decreasing step determining means is reduced to a normal position. A step-down position returning means for returning to the step position is provided. According to the present invention, when the step is reduced during the forced step-up, the step-down position (QDIF '), which has been changed from the position where the forced step-up is performed to a position lower than the predetermined value, is changed to the normal step-down position ( QDIF). A fifth invention (an invention according to claim 5) is the first to fourth inventions, wherein an alarm output means for outputting an alarm when the forced step-up determination is performed by the forced step-up determination means is provided. According to the present invention, the forced step increase is notified by the alarm.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on embodiments. The heat source device control device according to the present invention is shown as 14 'in FIG. This control device (heat source device control device) 14 'is used in place of the conventional control device 14.

As shown in FIG. 2, the controller 14 'has a CPU 14-1, a ROM 14-2, a RAM 14-3, and interfaces 14-4 to 14-7.
And The CPU 14-1 obtains various input information from the system provided via the interfaces 14-4 and 14-5, and performs various processing operations while accessing the RAM 14-3 according to a program stored in the ROM 14-2. Do.

The CPU 14-1 has an interface 1
The water supply temperature TS, the return water temperature TR1, and the flow rate F are provided via 4-4, and the heat source inlet temperature TR2 to the refrigerators 1-1 to 1-3 is provided via the interface 14-5. In addition, the CPU 14-1 includes an interface 14-
6 to output a control command to the refrigerators 1-1 to 1-3 via the interface 14-7.

[Operation for controlling the number of operating units] FIG.
4 'shows the operation number control operation performed by the CPU 14-1 of 4'. [Load Judgment 1] First, as the load judgment 1, the CPU 14-1 makes a step-down judgment of the number of operating units based on the heat source inlet temperature (step 101). FIG. 3 shows details of the processing operation in step 101. The CPU 14-1 compares the currently operated number with the number of step-down possible units, and proceeds to step 302 if the current number of operation> the number of step-down possible units. Usually, the number of steps that can be reduced is one.

In step 302, it is checked whether or not the step-down effect waiting time has elapsed since the end of the previous step-down operation. If the step-down effect waiting time has elapsed, the routine proceeds to step 303. In step 303, the heat source inlet temperature TR2 provided through the interface 14-5 and the forced step-down temperature set value t
Compare with x. Here, if TR2 <tx, after elapse of a predetermined time (step 304), it is determined that the load determination 1 has been established (step 305). On the other hand, if steps 301, 302, and 303 are “N”, it is determined that load determination 1 is not established (step 30).
6).

The result of this load judgment 1 is
When the load determination 1 is established, the step reduction process is performed (step 114). In this step-down process, a stop command is sent to the lowest operating order among the refrigerators that are currently operating. As a result, the heat source inlet temperature TR2 is maintained at or above the forced step-down temperature set value tx.
Failures of 1-3 are prevented. If the load determination 1 has not been established, the routine proceeds to step 103, where the load determination 2 is performed.

[Load Judgment 2] In Load Judgment 2, the number of operating units is forcibly increased based on the water supply temperature. Figure 4 Step 1
03 shows the details of the processing operation. The CPU 14-1 compares the current operating number with the number of units that can be increased, and determines the current operating number <
If the number can be increased, the process proceeds to step 402. The number of units that can be increased is the maximum number of units that can be operated.
It is a stand.

In step 402, it is checked whether or not the step-up effect waiting time has elapsed since the end of the previous step-up, and if the step-up effect waiting time has elapsed, the routine proceeds to step 403. In step 403, the water supply temperature TS provided via the interface 14-4 is compared with the forced step-up temperature set value tsu. Here, if TS> tsu, after elapse of a predetermined time (step 404), it is determined that the load determination 2 has been established (step 405). On the other hand, if steps 401, 402, and 403 are “N”, it is determined that load determination 2 is not established (step 406).

The result of this load judgment 2 is
Is checked, and if the load determination 2 is established, an alarm is output via the interface 14-6 (step 116). In addition, the position of the step reduction at the time of the step reduction determination based on the load heat amount is changed (step 117), and the forced step increase processing is performed (step 118). Step 117, FIG.
Details of the processing operation at 118 (step change position change, forced step increase) will be described.

In step 117, the position lower by DIF (%) from the position where the forced step-up is performed is changed to the step-down position (correction step-down position) QDIF '(step 501).
That is, in the step-down determination based on the load heat amount, the step-down position that is normally set to QDIF is replaced with the correction step-down position QDI.
Change to F '. As a result, when the step is forcibly increased based on the load determination 2, it is prevented that the step is reduced by the step reduction determination based on the immediately subsequent load heat amount Q, and the repetition of the increase / decrease step is prevented. In step 118, a start command is sent to the highest operating order among the currently stopped refrigerators (step 502), and the elapse of the effect waiting time is waited (step 503).

If the load determination 2 is not established in step 104, it is checked whether or not a forced increase is being performed (step 105). Proceed to step 106. In step 106, load determination 3 is performed. In step 113, the current load heat quantity Q is compared with the corrected step-down position QDIF ', and if Q <the corrected step-down position QDIF', step-down processing is performed (step 114). In this case, in step 115, the correction step-down position QDIF 'is changed to the normal step-down position QDIF.
Return to IF.

[Load Judgment 3] In the load judgment 3, a step-down judgment based on the load heat quantity is performed. 6 shows details of the processing operation in step 106. The CPU 14-1 compares the currently operated number with the number of step-down possible units, and proceeds to step 602 if the current number-of-operations unit> the number of step-down possible units. In step 602, it is checked whether or not the step-down effect waiting time has elapsed since the end of the previous step-down operation. If the step-down effect waiting time has elapsed, the process proceeds to step 603.

In step 603, the interface 1
Water supply temperature TS and return water temperature TR given via 4-4
1 and the flow rate F, the current load heat quantity Q = F × (TR1
−TS), and the present load heat quantity Q and “(total rated equipment capacity during current operation−step-down scheduled functional capacity) × (1-DI
F) = QDIF ”(step 604). If the current load calorific value Q is smaller than QDIF (QDIF
> Q), it is determined that the load determination 3 has been established (step 6).
05). If the current load heat quantity Q is larger than QDIF (QDIF ≦ Q), it is determined that the load determination 3 does not hold (step 606).

The result of the load determination 3 is determined in step 107
When the load determination 3 is established, the step reduction process is performed (step 114). In this step-down process, a stop command is sent to the lowest operating order among the refrigerators that are currently operating. If the load determination 3 is not established, the process proceeds to step 108, where the load determination 4 is performed.

[Load Judgment 4] In load judgment 4, a step increase judgment based on the load calorie is performed. FIG. 7 shows details of the processing operation in step 108. The CPU 14-1 compares the number of currently operated units with the number of units that can be increased, and proceeds to step 702 if the number of currently operated units is smaller than the number of units that can be increased. In step 702,
It is checked whether or not the step-up effect waiting time has elapsed since the end of the previous step-up operation. If the step-up effect waiting time has elapsed, the process proceeds to step 703.

In step 703, the previous step 603
The current load calorie Q obtained in the above is compared with “total rated equipment capacity during current operation × (1 + HLMT) = QHLMT”.
If the current load calorific value Q is larger than QHLMT (QH
LMT <Q), it is determined that the load determination 4 has been established (step 704). If the current load heat quantity Q is smaller than QHLMT (QHLMT ≧ Q), it is determined that the load determination 4 does not hold (step 705).

The result of the load determination 4 is based on step 109
In step 119, if the load determination 4 is established, the step increase process is performed. In this step-up process, a start command is sent to the highest-operation refrigerator out of the currently stopped refrigerators (step 801 shown in FIG. 8), and the elapse of the effect waiting time is waited (step 802). If the load determination 4 is not established, the process proceeds to step 110, where the load determination 5 is performed.

[Load Judgment 5] In load judgment 5, a stage increase correction judgment is performed based on the load calorie and the water supply temperature. FIG. 9 shows details of the processing operation in step 110. CPU 14-1
Compares the current operating number with the number of units that can be increased, and proceeds to step 902 if the number of currently operated units is smaller than the number of units that can be increased. In step 902, it is checked whether or not the step-up effect waiting time has elapsed since the end of the previous step-up operation. If the step-up effect waiting time has elapsed, the process proceeds to step 903.

In step 903, the previous step 603
The current load calorific value Q obtained in the above is compared with "currently operating total rated equipment capacity x (1-LLMT) = QLLMT" and "currently operating total rated equipment capacity x (1 + HLMT) = QHLMT", and the water supply temperature. TS is compared with the step increase correction temperature set value ts. If QLLMT <Q <QHLMT and TS> ts, it is determined that the load determination 5 has been established (step 904). If QLLMT <Q <QHLMT and TS> ts are not satisfied, it is determined that the load determination 5 does not hold (step 905).

The result of the load determination 5 is determined in step 111
In step 119, if the load determination 5 is established, the step increase process is performed. If the load determination 5 is not satisfied, it is confirmed in step 112 that the number control has not been completed, and the process returns to step 101.

During the forced step-up operation, in the load determination 4 in step 108, the total value of the rated capacity of the currently operating refrigerator including the forcedly stepped-up refrigerator in place of the normal step-up position QHLMT ( Use the total rated equipment capacity during current operation). That is, if it is necessary to start another refrigerator while the forcedly activated refrigerator is operating, the rated capacity total value of the operating refrigerator including the forcedly activated refrigerator is calculated as the value of the load heat quantity Q. When it exceeds, the start condition of another refrigerator is set. This is because the water supply conditions may be adjusted or the operation performance of the refrigerator may return to the normal level after a certain period of time has elapsed.

In the above description, an alarm is issued immediately after the establishment of the load determination 2 is confirmed (step 116). However, an alarm may be issued after the forced step-up process is performed in step 118. . A warning is issued at the time of forced step-up to notify the administrator that there is a need for inspection. With this function, it is possible to clarify the malfunction of the entire air conditioning system, not only around the refrigerator, and to expect the effect of preventive maintenance of the refrigerator.

In the above-described embodiment, the case where the number of operating refrigerators is controlled has been described. However, the present invention can be similarly applied to the case where the number of operating water heaters or the like is controlled.

[0041]

As is apparent from the above description, according to the present invention, in the first invention, before the increase / decrease stage determination based on the load heat quantity obtained from the water supply temperature, the return water temperature and the flow rate, the water supply temperature is reduced. In this forced stage determination, if the current water supply temperature is lower than the forced stage temperature setting value, the number of operating heat source devices is forcibly increased. If the actual capacity is significantly lower than the design capacity due to the performance degradation of the air conditioner, or if the air conditioner is started before the heat source equipment is activated and the capacity is fully exhibited, the detected heat load will change the heat source equipment. Even if the number of steps is not increased, it is possible to eliminate the inconvenience when the steps need to be actually increased.

In the second aspect of the invention, as a first step, a step reduction determination (load determination 1) based on the heat source inlet temperature is performed, and the second step is performed.
As a step, a forced step increase determination based on the water supply temperature is performed (load determination 2), and as a third step, an increase / decrease step determination based on the load heat quantity obtained from the water supply temperature, the return water temperature, and the flow rate (load determination 3, 4) is performed. As a fourth step, a step-up correction judgment (load judgment 5) based on the load calorie and the water supply temperature is performed. In the forced step-up determination in the second step, the current water supply temperature is lower than the forced step-up temperature set value. In this state, the number of operating heat source devices is forcibly increased, so that in the first step, the failure of the heat source devices is prevented, and the second
The effect described in the first invention is obtained in the step, and the operation capability of the heat source corresponding to the heat load is ensured in the third step.
The design water supply temperature can be ensured in steps. The steps are in order of importance.

In the third aspect of the invention, when the forced step-up based on the water supply temperature is performed, the normal step-down position (QDIF) in the increase / decrease step determining means is at a position lower than the position where the forced step-up has been performed by a predetermined value ( QDIF ') to prevent the problem that the heat source equipment increased by the forced increase based on the water supply temperature is stopped by the immediately following step reduction determination based on the heat load and the increase and decrease steps are repeated. it can. 4th
According to the present invention, when the step is reduced during the forced step-up, the step-down position (QDIF '), which has been changed from the position where the forced step-up is performed to a position lower than the predetermined value, becomes the normal step-down position (QDIF). This makes it possible to smoothly return from the state where forced step-up is required to the state where forced step-up is not required. In the fifth invention, the forced step increase is notified by an alarm, and the operator can be notified that an abnormal state has occurred in the system such as the performance of the heat source device has been degraded or a failure has occurred. It will help you to recover to normal as soon as possible.

[Brief description of the drawings]

FIG. 1 is a flowchart showing the operation number control operation performed by a heat source device control device according to the present invention.

FIG. 2 is a block diagram schematically showing an internal configuration of the heat source device control device.

FIG. 3 is a flowchart showing details of load determination 1 performed by the heat source device control device.

FIG. 4 is a flowchart showing details of load determination 2 performed by the heat source device control device.

FIG. 5 is a flowchart showing details of the step-down position change and forced step-up processing performed by the heat source device control device.

FIG. 6 is a flowchart showing details of load determination 3 performed by the heat source device control device.

FIG. 7 is a flowchart showing details of a load determination 4 performed by the heat source device control device.

FIG. 8 is a flowchart showing details of a stage increase process performed by the heat source device control device.

FIG. 9 is a flowchart illustrating details of a load determination 5 performed by the heat source device control device.

FIG. 10 is a diagram showing a step-up correction possible range determined in the heat source device control device.

FIG. 11 is an instrumentation diagram of a system for controlling the number of operating units using a heat source device control device.

FIG. 12 is a diagram exemplifying an operation order table and a device capacity table used in the control device of the operating number control system, and an operation designation table substantially used;

FIG. 13 is a flowchart showing a conventional operation number control operation performed by the control device in the operation number control system.

[Explanation of symbols]

1-1 to 1-3: refrigerator, 2-1 to 2-3 ... pump,
3, 4 header, 5 load equipment, 6 water supply line, 7 return water line, 8, 9, 15 thermometer, 10 flow meter, 11
Bypass line, 12: bypass valve, 13: differential pressure gauge, 1
4 '... Control device (heat source device control device), 14-1 ... CP
U, 14-2 ... ROM, 14-3 ... RAM, 14-4 ~
14-7 Interface.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yukihiko Oka 2-12-19 Shibuya, Shibuya-ku, Tokyo Yamatake Ha Newel Co., Ltd. (72) Tomoko Kamoshida 2-12-19 Shibuya, Shibuya-ku, Tokyo Yamatake F-term in Honeywell Co., Ltd. (reference) 3L060 AA08 CC05 CC15 DD03 EE31

Claims (5)

[Claims] 1. A heat source device control device for controlling the number of operating heat source devices according to a load state, comprising: determining a step of increasing or decreasing the number of operating heat source devices based on a load heat amount obtained from a water supply temperature, a return water temperature, and a flow rate. Means for performing increase / decrease stage determination; and performing forced increase / decrease determination based on the water supply temperature prior to the increase / decrease stage determination by the increase / decrease stage determination means. If the current water supply temperature is in a state less than the forced increase stage temperature set value, the heat source A heat source device control device, comprising: forced step-up determination means for forcibly increasing the number of operating devices. 2. A heat source device control device for controlling the number of operating heat source devices according to a load state, comprising: a step reduction determining means for determining a step reduction of the number of operating heat source devices based on a heat source inlet temperature; After the step-down determination by the step determination means, a forced step-up determination based on the water supply temperature is performed, and if the current water supply temperature is less than the forced-step-up temperature set value, a forced increase of the number of operating heat source devices is performed. Stage determination means, and increase / decrease stage determination means for performing increase / decrease stage determination of the number of operating heat source devices based on the load heat quantity obtained from the water supply temperature, the return water temperature and the flow rate after the forced stage increase determination by the forced stage increase determination means; And a step-up correction determining means for performing a step-up correction determination based on the load calorie and the water supply temperature after the step-up / step-down determination by the step-up / down step determining means. 3. The method according to claim 1, wherein when the forced step-up determination is performed by the forced step-up determining means, a normal step-down position in the increasing / decreasing step determination means is shifted by a predetermined value from a position at which the forced step-up is performed. A heat-source-equipment control device comprising: a step-down position changing unit that changes a position to a position lower than a predetermined position. 4. The step-down operation according to claim 3, wherein when the step-down operation is carried out during the forced step-up operation by said forced step-up operation, the step-down position changed by said increase / decrease step operation is returned to a normal step-down position. A heat source device control device comprising a position returning means. 5. The method according to claim 1, wherein the forced step-up determining means performs step-up.
A heat source device control device comprising an alarm output unit for outputting an alarm.