JPH10339546A - Demand control device for freezer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a reduction in quality of frozen items in a freezer, enable a control corresponding to variation in cooling load to be carried out and further enable a burden of user against monitoring the freezer to be reduced. SOLUTION: This device is comprised of each of freezers 9 for cooling some frozen items stored in a plurality of refrigerator warehouses 13; a demand controller 7; and a central control device 8 in which a demand signal is inputted from the demand controller, a plurality of operating set temperature of freezers and a plurality of present temperatures of refrigerator warehouses are inputted. A central control device 8 may compare an inputted operation set temperature of each of the freezers with a varying amount in a unit time of a difference between the present temperatures of each of the refrigerator warehouses, when the demand signal is produced and then preferentially stops the operation of the freezer of the refrigerant warehouse showing a low variation in temperature difference.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a demand control device for a refrigerator, which controls the operating states of a plurality of refrigerators to average power consumption.

[0002]

2. Description of the Related Art FIGS.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram and a control flowchart showing a conventional demand control device for a refrigerator described in Japanese Patent No. 3232, wherein 1 is a demand controller which constantly monitors the power consumption per unit time of the entire system, and When the usage exceeds the preset specified value, a demand signal is issued, and the operation of the system is controlled until the used amount becomes equal to or less than the specified value. And control the operation of the system in its original state. Reference numerals 2a to 2e denote refrigerators, air conditioners and their auxiliary devices (cooling tower, cooling water pump, etc.), 3 denotes a control line, and 4 denotes a central control device. Note that the demand controller 1 is connected only to the central control device 4. Also,
FIG. 33 shows the internal configuration of the central control unit 4. The input unit 4a takes in and stores an input 2A such as a set temperature and an indicated temperature of the refrigerator, the air conditioner, and the auxiliary machines 2a to 2e, a storage unit 4b, and a demand. Demand signal 1 from controller 1
An input unit 4c and a storage unit 4d for taking in and storing A, a calculation unit 4e that calculates the contents stored in these storage units 4b and 4d, and issues a start / stop command 4A to the refrigerator, the air conditioner, and the auxiliary machines 2a to 2e. It comprises an output unit 4f.

Next, the operation will be described. The central control unit 4 monitors the operation state of each device and can issue a command to stop the operation. An input 2A such as a set temperature and an indicated temperature of each of the refrigerators, the air conditioners, and the auxiliary devices 2a to 2c is constantly input to the central control device 4 through the input unit 4a, and the data is stored in the storage unit 4b. On the other hand, the demand signal 1A from the demand controller
c, and those data are stored in the storage unit 4d. Here, the operation at the time of occurrence of a demand will be described with reference to the flowchart of FIG. Step 41
When the central control unit 4 inputs the demand signal 1A, the central control unit 4 immediately calls the set temperature and the instruction temperature of the storage unit 4b in the calculation unit 4e, and calculates the margin of the temperature in each compartment and the room. (Step 42), the stop command 4A is issued to the device with the most margin through the output unit 4f (Step 44). Further, if the demand signal 1A still continues (step 43), a stop command 4A is issued to the second spare device, and the same operation is performed thereafter.
Repeat until A is released.

[0005] Next, the demand cancellation will be described with reference to the flowchart of FIG. Steps 51 and 52 are shown in FIG.
This is the same as the operation up to steps 41 and 42 of FIG. Next, at step 53, the demand signal 1A is released, and after a certain period of time, the central control device 4 issues an operation command to the device having the least room for temperature (step 54). Further, if the demand signal 1A has been released for a certain period of time, the same operation is repeated for a device having no next margin. For example, at the time of issuing the demand signal 1A, if there is a margin of temperature in the order of the refrigerator, the air conditioner, and their accessories 2b, 2d, 2a, 2c, 2e according to the calculation result, the central control device 4 ,
Air conditioners and their accessories 2b-2d-2a-2c-2
Stop command 4 until the demand signal 1A is released in the order of e
Give A.

Conversely, when the demand is released, if there is no room for the temperature in the order of the refrigerator, the air conditioner, and these auxiliary devices 2a, 2b, 2c, 2d, 2e, the central control unit 4 operates while the demand signal is released. Permits the operation of the refrigerator, the air conditioner, and the auxiliary devices 2a-2b-2c-2d-2e in this order.

[0006]

Since the conventional demand control device for a refrigerator is configured as described above, a simple power peak is determined by ranking the temperature margins according to the set temperature and the indicated temperature in each refrigerator. Cutting is not enough to minimize the deterioration of the temperature quality of the frozen object in the refrigerator, and cannot be controlled according to the fluctuation of the cooling load. There was a point.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and there is no deterioration in the quality of the frozen object in the refrigerator, control according to the fluctuation of the cooling load is possible, and the monitoring of the user is prevented. It is an object of the present invention to obtain a demand control device for a refrigerator that can reduce a load.

[0008]

A demand control device for a refrigerator according to the present invention includes a refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses, and electric power consumption per unit time of the entire system. Monitors the amount and issues a demand signal if the power consumption exceeds a preset specified value,
A demand controller for canceling a demand signal if the state becomes equal to or less than a specified value or a state equal to or less than the specified value continues for a predetermined time; and the demand signal is input from the demand controller, and the operation set temperatures of the plurality of refrigerators and the plurality of refrigerators are set. A central control device to which the current temperature of the refrigerated warehouse is inputted, wherein the central control device, when a demand signal is generated, calculates the difference between the input operation set temperature of each refrigerator and the current temperature of each refrigerated warehouse. The power peak cut control is performed by comparing the amount of change within the unit time and giving priority to stopping the refrigerator in the refrigerated warehouse where the temperature difference change is small.

In addition, each refrigerator for cooling the frozen objects stored in the plurality of refrigerated warehouses and the power consumption per unit time of the whole system are monitored, and the power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
The demand signal is input from the demand controller, and includes a central control device to which an operation set temperature of the plurality of refrigerators and a current temperature of each of the refrigerated warehouses are input, wherein the central control device generates a demand signal, The power peak cut control is performed by comparing the input operation set temperatures of the respective refrigerators and stopping the refrigerator with a lower operation set temperature with priority.

[0010] Further, the refrigerators for cooling the frozen objects stored in the plurality of refrigerated warehouses and the power consumption per unit time of the whole system are monitored, and the power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
The demand signal is input from the demand controller, and includes a central control device to which an operation set temperature of the plurality of refrigerators and a current temperature of each of the refrigerated warehouses are input, wherein the central control device generates a demand signal, Compare the ON / OFF times of each refrigerator within a unit time calculated based on the input operation set temperature of the refrigerator and the current temperature of the refrigerator, and preferentially stop the refrigerator having a smaller frequency. Thus, power peak cut control is performed.

[0011] Further, each refrigerator for cooling the frozen objects stored in a plurality of refrigerated warehouses and the power consumption per unit time of the whole system are monitored, and the power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
The demand signal is input from the demand controller, and includes a central control device to which an operation set temperature of the plurality of refrigerators and a current temperature of each of the refrigerated warehouses are input, wherein the central control device generates a demand signal, Compare the time from stop to restart of each refrigerator calculated based on the input operation set temperature of the refrigerator and the current temperature of the refrigerator, and give priority to the refrigerator with the larger time value. By stopping the operation, power peak cut control is performed.

In addition, the refrigerators for cooling the frozen objects stored in the plurality of refrigerated warehouses and the power consumption per unit time of the entire system are monitored, and the power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
The demand signal is input from the demand controller, and includes a central control device to which an operation set temperature of the plurality of refrigerators and a current temperature of each of the refrigerated warehouses are input, wherein the central control device generates a demand signal, Compare the time from the operation of each refrigerator to the next operation calculated based on the input operation set temperature of the refrigerator and the current temperature of the refrigerator, and prioritize the refrigerator with the larger time value. In this case, the power peak cut control is performed.

Further, each refrigerator for cooling the frozen objects stored in a plurality of refrigerated warehouses and the power consumption per unit time of the whole system are monitored, and the power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
The demand signal is input from the demand controller, and includes a central control device to which an operation set temperature of the plurality of refrigerators and a current temperature of each of the refrigerated warehouses are input, wherein the central control device generates a demand signal, By comparing the continuous operation time of each refrigerator calculated based on the input operation set temperature of the refrigerator and the current temperature of the refrigerated warehouse, the refrigerator having a larger time value is stopped with priority. This is to control the power peak cut.

Further, each refrigerator for cooling the frozen objects stored in the plurality of refrigerated warehouses and the power consumption per unit time of the entire system are monitored, and the power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
The demand signal is input from the demand controller, and includes a central control device to which an operation set temperature of the plurality of refrigerators and a current temperature of each of the refrigerated warehouses are input, wherein the central control device generates a demand signal, Compare the temperature rise rate after operation of each refrigerator calculated based on the input operation set temperature of the refrigerator and the current temperature of the refrigerator, and prioritize the refrigerator with the lower temperature rise rate to stop. By doing so, power peak cut control is performed.

[0015] Further, according to the storage situation in the refrigerated warehouse, the temperature rise rate after the operation is stopped is stored, and the temperature value after a predetermined time has elapsed is predicted.

Further, each refrigerator that cools the frozen objects stored in the plurality of refrigerated warehouses and the power consumption per unit time of the whole system are monitored, and the power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
A central control unit for receiving the demand signal from the demand controller and for inputting a storage / removal amount of the articles to be frozen in the plurality of refrigerated warehouses, wherein the central control unit receives the demand signal when the demand signal is generated, The power peak cut control is performed by comparing the in-out amount of the article to be stored in and out of the warehouse, and preferentially stopping the refrigerator in the refrigerated warehouse in which the in-out amount of the article to be frozen is small.

[0017] Further, each refrigerator for cooling the frozen objects stored in the plurality of refrigerated warehouses and the power consumption per unit time of the entire system are monitored, and the power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
An opening / closing number detecting device for detecting the number of opening / closing times of the doors of each refrigerated warehouse in a unit time, and the demand signal is input from the demand controller, and the opening / closing number detecting device detects the number of opening / closing times of the doors of each refrigerated warehouse in a unit time. A central control unit for inputting the number of times of opening and closing, wherein the central control unit compares the number of times of opening and closing of the doors of each refrigerated warehouse inputted in a unit time when a demand signal is generated; The power peak cut control is performed by preferentially stopping the refrigerator.

Further, each refrigerator for cooling the frozen objects stored in the plurality of refrigerated warehouses and the power consumption per unit time of the entire system are monitored, and the power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
An opening time detecting device for detecting an opening time of the door of each refrigerated warehouse in a unit time, and the demand signal is input from the demand controller, and the opening time detecting device detects the opening time of the door of each refrigerated warehouse in the unit time. A central controller for inputting the opening time, wherein the central controller compares the input opening time of the door of each refrigerated warehouse within a unit time when the demand signal is generated, and the refrigerated warehouse having a shorter opening time. The power peak cut control is performed by preferentially stopping the refrigerator.

Further, each refrigerator for cooling the frozen objects stored in the plurality of refrigerated warehouses and the power consumption per unit time of the whole system are monitored, and the power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
An opening / closing detection device for detecting opening / closing of the door of each refrigerated warehouse,
The demand signal is input from the demand controller, and the current temperature of each of the refrigerated warehouses is input, and the central control device is provided with the opening and closing time of each of the refrigerated warehouse doors by the open / close detection device, When a demand signal is generated, the central controller compares the temperature difference between the temperature immediately after the door is opened and the temperature immediately after the door is closed when the demand signal is generated. By giving priority to stopping, power peak cut control is performed.

Also, the refrigerators for cooling the frozen objects stored in the plurality of refrigerated warehouses and the power consumption per unit time of the entire system are monitored, and the power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
A frost state detection device for detecting a frost state of a cooler of each refrigerator based on a drive current value of a fan provided in the cooler; and the demand signal is input from the demand controller to detect the frost state. A central controller for inputting the frost state of the cooler of each refrigerator by a device, wherein the central controller compares the input frost state of the cooler of each refrigerator when a demand signal is generated. Then, by preferentially stopping the refrigerator of the cooler with less frost,
This is to control the power peak cut.

Further, each refrigerator for cooling the frozen objects stored in the plurality of refrigerated warehouses and the power consumption per unit time of the whole system are monitored, and the power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
A frost state detection device that detects a frost state of a cooler of each refrigerator by a drive current value of a fan provided in the cooler, and the frost state of the cooler of each refrigerator becomes a predetermined state. A defrosting device that performs a defrosting operation, and a central control device to which the demand signal is input from the demand controller and the number of defrosting operations per unit time of a cooler of each refrigerator is input; When a demand signal is generated, the central control unit compares the input defrosting operation times of the refrigerators of the respective refrigerators in the unit time, and gives priority to the refrigerators of the refrigerators having a smaller number of defrosting operations in the unit time. The power peak cut control is performed by stopping the operation.

Further, each refrigerator for cooling the frozen objects stored in the plurality of refrigerated warehouses and the power consumption per unit time of the whole system are monitored, and the power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
A central controller for receiving the demand signal from the demand controller and receiving the storage capacities of the plurality of refrigerated warehouses, wherein the central controller controls the input storage capacity of each refrigerated warehouse when a demand signal is generated. By comparing
Power peak cut control is performed by preferentially stopping a refrigerator in a refrigerated warehouse having a large storage capacity.

Further, each refrigerator for cooling the frozen objects stored in the plurality of refrigerated warehouses and the power consumption per unit time of the whole system are monitored, and the power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
The demand signal is input from the demand controller, and comprises a central control device to which a characteristic value corresponding to the plurality of refrigerated warehouse temperatures is input, wherein the central control device includes:
When a demand signal is generated, the input characteristic value of each refrigerated warehouse is compared, and a predetermined refrigerator is preferentially stopped according to the characteristic value, thereby performing power peak cut control.

The characteristic value is the refrigerant evaporation temperature of the cooler.

The characteristic value is a refrigerant evaporation pressure of the cooler.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a demand control device for a refrigerator according to an embodiment of the present invention, which is substantially common to Embodiments 1 to 16 described later. In the figure, reference numeral 6 denotes a watt hour meter for measuring the power consumption of a group of refrigerators (refrigerators, air conditioners and their auxiliary devices), and reference numeral 7 denotes pulses transmitted according to the power consumption from the watt hour meter 6. A power measurement controller for transmitting the current power consumption to the following central control device;
The target demand of electric power is input, and the set temperature and operation state of each refrigerator described below, the temperature inside the refrigerator store below are extracted from the refrigerator controller below, and information on the current power consumption is collected from the electric power measurement controller 7. Calculate,
This is a central control device that determines the operation ON / OFF of the refrigerator and issues an output command to the refrigerator controller 10 through the following multiplex transmission line. 9 is a refrigerator, each refrigerator 9a for each refrigerator warehouse 13
To 9e. Reference numerals 10 (10a to 10e) indicate the operating state of the refrigerator 9 and the temperature sensor 1 to the central controller 8.
1 to transmit ON / OFF of the refrigerator 9 based on a command setting from the central control unit 8.
Refrigeration controller 12, the electric energy measurement controller 7, the central control device 8, and the refrigeration controller 10
Are multiplex transmission lines.

FIG. 2 shows the internal configuration of the central control unit 8, which is common to the following first to sixteenth embodiments. In the figure, refrigerator groups 9a to 9e
An input unit 8a that captures and stores an input 9A such as a set temperature and an instruction temperature of the storage unit 8b, an input unit 8c that captures and stores an internal temperature input from the refrigerator controller 10 and an operation / stop state 10A, and a storage unit 8d. An input unit 8e, a storage unit 8f, and a storage unit 8b, 8d, and 8f that capture and store a used power amount input 7A from the power amount measurement controller 7.
The operation unit 8g is configured to calculate the stored contents of the above, and to provide an operation / stop command 8A to the refrigerator groups 9a to 9e, and an output unit 8h.

Next, the operation will be described. The central control unit 8 monitors the operating state of each device and can issue a command to stop the operation. The central control device 8 includes each of the refrigerator groups 9a-
An input 9A such as a set temperature and an indicated temperature of 9e is always input through the input unit 8a, and the data is stored in the storage unit 8b. On the other hand, each of the refrigerator controllers 10a to 10e
From each refrigerated warehouse 13 detected by each temperature sensor 11
The current temperature in the chamber is always input unit 8 as the internal temperature input 10A.
c, and these data are stored in the storage unit 8d. In addition, a power consumption input 7A is input as a demand signal from the power measurement controller (demand controller) 7 through the input unit 8e as a demand signal, and the data is stored in the storage unit 8f.

Embodiment 1 FIG. 3 is a state diagram showing a change in the internal temperature difference in the refrigerator demand control device according to the first embodiment of the present invention. FIG. 4 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 1 of the present invention. FIG. 5 is a control flowchart at the time of releasing the demand in the refrigerator demand control device according to Embodiment 1 of the present invention.
Here, the amount of change in the difference between each refrigerator operation set temperature and the current temperature in each refrigerator warehouse 13 will be described with reference to FIG. Each cold storage 13 is operated ON temperature d _a and the operation OFF temperature d _b each chiller 9 depending on the type of the frozen food to be stored is set.

For example, the case of the refrigerators 9a, 9b and 9c will be described. A change in the temperature of the refrigerator within a predetermined unit time, that is, a rise in temperature, indicates that the temperature of the refrigerator 9a is Δd.
_1, inside temperature [Delta] d ₂ of the refrigerator 9b, the internal temperature of the refrigerator 9c is changed by [Delta] d _3, the relationship of _{Δd 1> Δd 2> Δd 3} . In this case, the refrigerator set temperature, that is, the refrigerator O
The difference between the temperature change of the FF temperature d _b and the current temperature there is a temperature margin in the case of small, even to stop the refrigerator does not have much influence on subsequent temperature, also, when the difference between the temperature change becomes large temperature There is no room, and if the refrigerator is stopped, the subsequent temperature rise will be large. Therefore, since the temperature change Δd ₃ is the smallest, even if the operation is stopped when the refrigerator 9c is in operation, there is a margin in the temperature inside the refrigerator, and the influence on the frozen object is reduced.

Next, the operation when a demand occurs is shown in FIG.
This will be described together with the flowchart of FIG. In step 61, an input 9A such as a set temperature and an indicated temperature of each of the refrigerator groups 9a to 9e is constantly input through the input unit 8a. When the central control device 8 inputs the demand signal 7A (step 62), the central control device 8 immediately calculates the set temperature of the storage unit 8b, the indicated temperature, the current temperature of the storage unit 8d, and the change value within a unit time by the arithmetic unit 8g. Is calculated, and the margin in each compartment is calculated (step 63). Then, the stop command 8A is sent to the device having the most margin, here the refrigerator 9c, by the output unit 8h.
(Step 64). Further, if the demand signal 7A still continues (step 63), a stop command 8A is issued to the second spare device, that is, the refrigerator 9b, and the same operation is repeated until the demand signal 7A is released. .

Next, the demand cancellation will be described with reference to the flowchart of FIG. In the figure, step 71 is the same as the operation of step 61 in FIG. Next, at step 72, when the demand signal 7A is released and a predetermined time has elapsed, the central control unit 8 immediately changes the set temperature of the storage unit 8b, the indicated temperature, the current temperature of the storage unit 8d, and the unit temperature within the unit 8g. The value is called, and the margin in each storage is calculated (step 73). Then, the central control unit 8 issues an operation permission command to the device having the least temperature margin, that is, the refrigerator having the largest temperature change amount (step 74). further,
If the demand signal 7A has been released for a certain period of time, the same operation is repeated for the next device having no temperature margin.

As described above, in the demand control device of the refrigerator for controlling the peak power of the refrigerator 9 installed in each of the refrigerators for cooling the frozen objects stored in the plurality of refrigerators 13, By comparing the amount of change in the unit operating time between the set operation temperature of the refrigerator and the current temperature of each refrigerated warehouse within a unit time, and prioritizing the operation of the refrigerator with the smaller difference in temperature change, the contracted power All refrigerated warehouses can be operated within a day.

Embodiment 2 FIG. 6 is a state diagram showing the temperature in the refrigerator in the demand control device for a refrigerator according to the second embodiment of the present invention. FIG. 7 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 2 of the present invention. In the figure, d _a1 ,
d _a2 , d _a3 , d _a4 , d _a5 are refrigerators 9a, 9b, 9c, 9
d, 9e operation ON temperature _{of, d b1, d b2, d} b3, d b4, d
_b5 is the operation OFF temperature. Each refrigerator 9a~9e to cool the cold store 13 and the operation ON temperature d _a1 to d _a5, are respectively differently set depending on the object to be frozen product is run OFF temperature d _b1 to d _b5 are housed. Set temperature, that is, refrigerator O
When the FF temperature is high, for example, the temperature control of vegetables and the like is severe, and the wall of the cold storage is usually thin, the heat insulation effect is poor, and the influence of the temperature change is large. On the other hand, when the refrigerator OFF temperature is low, the temperature of the refrigerator can be slightly changed because it is a frozen or frozen food such as ice cream. In addition, the wall of the refrigerated warehouse is usually thick, and the heat insulation effect is good and the influence of the temperature change is small.

Next, the operation when a demand is generated is shown in FIG.
This will be described together with the flowchart of FIG. In step 81, an input 9A such as a set temperature and an indicated temperature of each of the refrigerator groups 9a to 9e is constantly input through the input unit 8a. Then, in step 82, when the central control device 8 inputs the demand signal 7A, the central control device 8 immediately
In step g, the set temperature and the instruction temperature of the storage unit 8b are called, and the set temperature in each refrigerator, that is, the refrigerator OFF temperature is compared and calculated (step 83), and the device having the lowest set temperature, here, the refrigerator 9c is called. A stop command 8A is issued through the output unit 8h (step 84). Further, if the demand signal 7A still continues (step 82), a stop command 8A is issued to the refrigerator 9d having the second lowest set temperature, and the same operation is repeated until the demand signal 7A is released. In the case of demand release, an operation permission command is issued to the refrigerator 9a having the highest set temperature in the same manner as in the above embodiment.

As described above, the operation set temperatures of the refrigerators 9 installed in the plurality of refrigerated warehouses 13 are compared, and the operation is stopped with priority given to the refrigerators having the lower set temperature values, and the peak of the electric power is reduced. Cut control can be performed.

Embodiment 3 FIG. 8 is a state diagram showing a refrigerator temperature in the refrigerator demand control device according to Embodiment 3 of the present invention. FIG. 9 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 3 of the present invention. The operation ON temperature and the OFF temperature of each of the refrigerators 9a to 9e are set for each refrigerator warehouse 13, and the operation is repeated. Here, the number of operations ON and OFF of the operations 9a to 9e of the refrigerators 9a to 9e within a predetermined unit time (T) is compared. If the number of operations ON and OFF is large, the temperature inside the chamber rises quickly and there is no temperature margin,
If the amount is small, the internal temperature rises slowly and there is room for temperature.

Next, the operation when a demand occurs is shown in FIG.
This will be described together with the flowchart of FIG. In step 91, an input 9A such as a set temperature and an indicated temperature of each of the refrigerator groups 9a to 9e is constantly input through the input unit 8a. In step 92, when the central control device 8 inputs the demand signal 7A, the central control device 8 immediately
g, the set temperature of the storage unit 8b, the indicated temperature, and the storage unit 8
The number of times of operation of each of the refrigerators 9a to 9e is called (step 93), and a stop command 8A is issued through the output unit 8h to the refrigerator 9 which has the least number of operations ON and OFF of each of the refrigerators 9a to 9b (step 94). ). Further, if the demand signal 7A still continues (step 92), a stop command 8A is issued to the refrigerator 9 having the second smallest number of operations ON and OFF, and the same operation is performed until the demand signal 7A is released. repeat. In the case of cancellation of demand, operation of refrigerator
N: An operation permission command is issued to the refrigerator 9 having a large number of OFF times in the same manner as in the above embodiment.

As described above, the operation of each refrigerator 9 installed in each of the plurality of refrigerated warehouses 13 within a unit time is turned on and off.
By comparing the F times, the operation of the refrigerator having the smaller number of operations is preferentially stopped to perform the peak cut control.

Embodiment 4 FIG. FIG. 10 is a state diagram showing a refrigerator temperature in the refrigerator demand control device according to Embodiment 4 of the present invention. FIG. 11 is a control flowchart at the time of issuing a demand in the demand control device for a refrigerator according to the fourth embodiment of the present invention. Each refrigerated warehouse 13
The operation ON temperature and the OFF temperature of each of the refrigerators 9a to 9e are set every time, and the operation is repeated. Here, each refrigerator 9a ~
The time from the stoppage of each 9e to the restart is compared. For example, assuming that the times from when the refrigerators 9a, 9b, 9c are stopped to when they are restarted are T ₁ , T ₂ , and T ₃ , T ₁
<T ₂ <T ₃ . When the time from operation stop to re-operation is short, the temperature inside the refrigerator rises quickly and there is no temperature margin, and when it is large, the temperature inside the refrigerator rises slowly and there is temperature margin.

Next, the operation when a demand occurs is shown in FIG.
This will be described with reference to the flowchart of FIG. Step 101
, An input 9A such as a set temperature and an indicated temperature of each of the refrigerator groups 9a to 9e is always input through the input unit 8a. In step 102, when the central control device 8 inputs the demand signal 7A, the central control device 8 immediately operates the arithmetic unit 8g to set the temperature of the storage unit 8b, the instruction temperature, and the operation time of each refrigerator 9 in the storage unit 8d. Is calculated (Step 103), and a stop command 8A is issued through the output unit 8h to the refrigerator 9c that has the longest time from the stoppage of the operation of each refrigerator 9 to the restart thereof (Step 103). 10
4). Further, if the demand signal still continues (step 102), a stop command is issued to the refrigerator 9b, which has the second shortest time from the stoppage to the re-operation, and the same operation is performed thereafter, and the demand signal 7A is released. Repeat until
In the case of the demand cancellation, an operation permission command is issued to the refrigerator 9a in which the time from the stoppage of the operation of the refrigerator to the re-operation is short, as in the above embodiment.

As described above, the time from the stoppage of each refrigerator 9 installed in each of the plurality of refrigerated warehouses 13 to the restart is compared, and the operation of the refrigerator having the larger time value is stopped with priority. Then, the peak cut can be controlled.

Embodiment 5 FIG. FIG. 12 is a state diagram showing a refrigerator temperature in the demand control device for a refrigerator according to the fifth embodiment of the present invention. FIG. 13 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 5 of the present invention. In the fourth embodiment, the comparison of the time from the stoppage of the refrigerator 9 to the restart is shown. However, as shown in FIGS. 12 and 13, the time from the operation of each refrigerator 9 to the next operation is shown. May be compared in the order of T ₁ <T ₂ <T ₃ . When the time from the operation to the next operation is short, the temperature change is fast and there is no temperature margin, and when it is large, the temperature change is gentle and there is a temperature margin.

The operation at the time of occurrence of a demand is the same as that of the above-described embodiment in steps 111 to 114 of the flowchart of FIG. Stop command 8 in order from
A is output through the output unit 8h. In the case of demand release, an operation permission command is issued to the refrigerator 9 in which the time from the operation of the refrigerator to the next operation is short, as in the above embodiment.

As described above, the time from the operation of each refrigerator 9 installed in each of the plurality of refrigerated warehouses 13 to the next operation is compared, and the operation of the refrigerator having the larger time value is stopped with priority. Then, the peak cut can be controlled.

Embodiment 6 FIG. FIG. 14 is a state diagram showing a refrigerator temperature in the refrigerator demand control device according to Embodiment 6 of the present invention. FIG. 15 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 6 of the present invention. In the fourth embodiment, the comparison of the time from the stoppage of the refrigerator 9 to the restart is shown. However, the continuous operation time of each refrigerator 9 may be compared as shown in FIGS. , T ₁ <T ₂ <
The order of T _3. When the continuous operation time of the refrigerator 9 is short, the temperature change is large and there is no temperature margin. When the continuous operation time is long, the temperature change is small and there is a temperature margin even if the operation is stopped.

As to the operation at the time of occurrence of the demand, in the same manner as in the above embodiment, steps 121 to 124 of the flowchart of FIG. Out through. In the case of demand release, an operation permission command is issued to the refrigerator 9 having the shortest continuous operation time in the same manner as in the above embodiment.

As described above, the continuous operation time of each refrigerator 9 installed in each of the plurality of refrigerated warehouses 13 is compared, and the operation is stopped with priority given to the refrigerator having the larger time value, and the peak is stopped. Cut control can be performed.

Embodiment 7 FIG. FIG. 16 is a state diagram showing the temperature in the refrigerator in the demand control device for a refrigerator according to the seventh embodiment of the present invention. FIG. 17 is a detailed view of FIG. FIG. 18 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 7 of the present invention. In the operating state of the refrigerator 9, different temperature rise ratio after shutdown of the refrigerator 9 for each cold storage 13, for example, the refrigerator 9 is 30 minutes after the time T ₀ has stopped operating time T ₀ +30 Where the temperature is from d ₀ to d ₀
The temperature rises by + α, and the temperature rise value after a predetermined time has elapsed can be predicted. High temperature rise rate after the operation of the refrigerator 9 is stopped;
That is, when the temperature gradient is large, the internal temperature rises quickly and there is no temperature margin, and when the temperature rise rate is low, that is, when the temperature gradient is small, the internal temperature rises slowly and there is room for temperature.

The operation when a demand occurs will be described with reference to the flowchart of FIG. In step 131, an input 9A such as a set temperature and an indicated temperature of each of the refrigerator groups 9a to 9e is constantly input through the input unit 8a. Then, in step 132, when the central control device 8 inputs the demand signal 7A, the central control device 8 immediately calls the set temperature of the storage unit 8b, the instructed temperature, and the internal temperature of the storage unit 8d by the arithmetic unit 8g, A margin in each refrigerator is calculated (step 133), and a stop command 8A is output to the refrigerator 9 having the lowest temperature rise rate after the operation of each refrigerator 9 is stopped.
h (step 134). Further, if the demand signal still continues (step 132), a stop command is issued to the refrigerator 9 having the second lowest temperature rise rate after the operation is stopped, and the same operation is performed until the demand signal 7A is released. repeat. In the case of canceling the demand, an operation permission command is issued to the refrigerator 9 having a high temperature rise rate after the operation of the refrigerator 9 is stopped in the same manner as in the above embodiment.

As described above, the refrigerator 9 is installed in each of the plurality of refrigerated warehouses 13 and the temperature rise rate after the operation is stopped according to the storage conditions such as the material and the storage amount of the frozen objects stored in the refrigerated warehouses. Can be stored in a storage device, and a temperature value after a lapse of a predetermined time can be predicted from the temperature rise rate.

Further, a comparison is made between the rate of temperature rise of each of the refrigerators 9 installed in the plurality of refrigerated warehouses 13 after the operation is stopped. Cut control can be performed.

Embodiment 8 FIG. FIG. 19 is a control flowchart at the time of issuing a demand in the demand control device for a refrigerator according to the eighth embodiment of the present invention. In the operating state of the refrigerator 9, the amount of the article to be frozen in and out of the refrigerator warehouse 13 is input to the input unit 8 c via the internal temperature input 10 A and stored in the storage unit 8 d. If the amount of the material to be frozen into and out of the refrigerated warehouse 13 is large, it takes a lot of time to cool the material to be frozen,
If there is no temperature margin and the amount of incoming and outgoing goods is small, cooling of the frozen object is easy and there is a temperature margin.

The operation when a demand occurs will be described with reference to the flowchart of FIG. When the central control unit 8 inputs the demand signal 7A (step 141), the central control unit 8 immediately calls the storage / discharge amount of the frozen object in the storage unit 8d by the calculation unit 8g, and calculates the margin in each storage. (Step 142), a stop command 8A is issued through the output unit 8h to the refrigerator 9 of the refrigerated warehouse 13 which has the least amount of articles to be frozen and stored (Step 143). Further, if the demand signal still continues (step 141), a stop command is issued to the refrigerator 9 of the refrigerated warehouse 13 having the second smallest amount of the article to be frozen and stored, and the same operation is performed by the demand signal 7A. Repeat until released. In the case of the demand cancellation, an operation permission command is issued to the refrigerator 9 of the refrigerated warehouse 13 having a large amount of articles to be frozen and stored, as in the above-described embodiment.

As described above, the refrigerators 9 are respectively installed in the plurality of refrigerated warehouses 13, and the operation of the refrigerated warehouses having a small amount of articles to be frozen and taken out is preferentially stopped to perform peak cut control. .

Embodiment 9 FIG. FIG. 20 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 9 of the present invention. In the above-described eighth embodiment, the comparison of the amount of incoming and outgoing of the frozen material to and from the refrigerated warehouse 13 is shown. However, as shown in the flowchart of FIG. Is also good. The number of times the door of the refrigerated warehouse 13 is opened and closed is electrically counted by, for example, a proximity switch or the like, and is input to the input unit 8c.
It is stored in the storage unit 8d. If the number of times of opening and closing the door is large, the number of times of entering and exiting the frozen object is also large, and therefore the temperature inside the refrigerator changes drastically and there is no temperature margin. The internal temperature changes slowly and there is room for temperature.

Therefore, when a demand occurs, the cold storage 13 with a small number of opening and closing of the doors is performed in the same manner as in the above embodiment by steps 151 to 153 in the flowchart of FIG.
, A stop command 8A is issued in order from the refrigerator 9. In the case of demand release, an operation permission command is issued in the same manner as in the above-described embodiment, starting from the refrigerator 9 in the refrigerated warehouse 13 where the number of times of opening and closing of the door is large.

As described above, the number of times the doors are opened / closed in a unit time of the plurality of refrigerated warehouses 13 in which the refrigerators 9 are respectively installed is detected and stored by the detecting device, and the refrigerators in the refrigerated warehouses with the small number of doors opened / closed are given priority. The operation can be stopped to perform peak cut control.

Embodiment 10 FIG. FIG. 21 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 10 of the present invention. In the above-described eighth embodiment, the comparison of the inflow and outflow of the frozen material to and from the refrigerated warehouse 13 is shown. However, as shown in the flowchart of FIG. You may. The time during which the door is open is measured, for example, by the time between ON and OFF of the proximity switch, and the input unit 8c
And is stored in the storage unit 8d. If the door is open for a long time, the amount of material to be frozen in and out of the refrigerator increases, so that the temperature inside the refrigerator increases, and the time required for cooling is long, so there is no room for temperature, and the time when the door is open is also long. If the temperature is short, the temperature inside the refrigerator rises only slightly, so that there is room for cooling.

Therefore, when a demand is generated, the refrigerator warehouse 1 in which the door is open for a short time is set in the same manner as in the above embodiment by the steps 161 to 163 of the flowchart of FIG.
A stop command 8A is issued from the refrigerator 9 in order. In the case of demand release, an operation permission command is issued in the same manner as in the above-described embodiment, starting from the refrigerators 9 in the refrigerated warehouse 13 where the door is open for a short time.

As described above, the opening time of the doors per unit time of the plurality of refrigerated warehouses 13 in which the refrigerators 9 are respectively installed is detected and stored by the detecting device, and the refrigerators in the refrigerated warehouses with short open times are preferentially operated. Is stopped and peak cut control can be performed.

Embodiment 11 FIG. FIG. 22 is a control flowchart at the time of issuing a demand in the demand control device for a refrigerator according to the eleventh embodiment of the present invention. In the above-described Embodiment 8, the comparison of the amount of incoming and outgoing of the frozen material to and from the refrigerated warehouse 13 is shown. However, as shown in the flowchart of FIG. You may compare. The internal temperature before the door is opened and the internal temperature after the door is closed are input to the input unit 8c and stored in the storage unit 8d. If the temperature difference before and after opening and closing the door is large, cooling takes time and there is no temperature margin, and if the temperature difference is small, there is a temperature margin.

Therefore, when a demand is generated, the stop command 8A is sequentially issued from the refrigerator 9 of the refrigerated warehouse 13 with a small temperature difference between before and after opening and closing the door in steps 171 to 173 of the flowchart of FIG. put out. In the case of releasing the demand, an operation permission command is issued in the same manner as in the above-described embodiment, starting from the refrigerators 9 in the refrigerator warehouse 13 having a large temperature difference between before and after opening and closing the door.

As described above, the temperature immediately after opening the doors of the plurality of refrigerated warehouses 13 in which the refrigerators 9 are respectively installed is compared with the temperature after the doors are closed after the doors are closed after entering and leaving the object to be frozen. The peak cut control can be performed by stopping the operation of the refrigerator in the refrigerated warehouse having a small temperature difference with priority.

Embodiment 12 FIG. FIG. 23 is a block diagram showing a configuration of a refrigerator in a demand control device for a refrigerator according to a twelfth embodiment of the present invention. FIG. 24 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 12 of the present invention.
In the figure, 9 is a refrigerator, 14 is a compressor, 15 is a condenser, 16 is a pressure reducing valve, 17 is a cooler serving as an evaporator, 17a
Is a fan. The high-temperature and high-pressure refrigerant gas compressed by the compressor 14 turns into a refrigerant liquid in the condenser 15 and is decompressed by the pressure reducing valve 16. The rotation of the fan 17 a causes the cooler 17 to exchange heat with the air in the refrigerated warehouse to cool the interior. I do. At this time, the frozen material that has just been stored takes time to cool, and the water evaporated during this cooling adheres to the cooler and becomes frost. Cooler 1
When frost is formed on 7, the wind resistance when the inside air passes through the cooler 17 increases, and therefore, the operating current value of the fan 17a increases. This change in the fan current value is input to the input unit 8e and stored in the storage unit 8f. If the amount of frost formed in the cooler 17 is large, the cooling efficiency is poor, so there is no temperature margin, and if the amount of frost is small, there is a temperature margin.

When a demand is generated, the inputs 9A such as the set temperature and the indicated temperature of each of the refrigerator groups 9a to 9e are constantly input in the step 181 in steps 181 to 184 of the flowchart of FIG. 8a. Then, in step 182, when the central control device 8 inputs the demand signal 7A, the central control device 8 immediately executes the operation of the cooler 1 of the storage unit 8f in the arithmetic unit 8g.
7 is calculated (step 183), and a stop command 8A is issued to the compressor 14 of the cooler 17 with the least amount of frost through the output unit 8h (step 184). In the case of releasing the demand, the compressor 14 of the cooler 17 having a large amount of frost is formed.
An operation permission command is issued in the same manner as in the above embodiment.

As described above, of the refrigerators 17 of the refrigerators 9 installed in the plurality of refrigerated warehouses 13, the refrigerator with the smaller amount of frost is preferentially stopped and the peak-cut operation is performed. Can be controlled.

Embodiment 13 FIG. FIG. 25 is a control flowchart at the time of issuing a demand in the refrigerator control apparatus according to Embodiment 13 of the present invention. The configuration of the refrigerator is the same as that of FIG. In the twelfth embodiment, the frost formation of the cooler 17 is compared.
May be the number of times of defrosting of the cooler per unit time as shown in the flowchart of FIG. The defrosting operation of the cooler is performed by the compressor 1
The high-temperature, high-pressure refrigerant gas discharged from 4 is introduced into the cooler 17 by switching the switching valve to be defrosted. The switching frequency of the switching valve is counted within a predetermined unit time, input to the input unit 8e, and stored in the storage unit 8f. If the number of times of defrosting is large, the temperature inside the refrigerator rises and cooling is required, and there is no temperature margin, and if the number of times of defrosting is small, there is a temperature margin.

Therefore, when a demand is generated, a stop command 8A is issued to the compressor 14 of the cooler 17 with a small number of defrosts through the output section 8h in steps 191 to 194 in the flowchart of FIG. Step 194). In the case of demand release, an operation permission command is issued to the compressor 14 of the cooler 17 having a large number of defrosting times in the same manner as in the above embodiment.

As described above, of the refrigerators 17 of the refrigerators 9 installed in the plurality of refrigeration warehouses 13, the refrigerator having the smaller number of defrosting operations per unit time is preferentially operated. It can be stopped to perform peak cut control.

Embodiment 14 FIG. FIG. 26 is a configuration diagram showing a storage capacity of a refrigerated warehouse in the refrigerator demand control device according to Embodiment 14 of the present invention. FIG. 27 is a control flowchart at the time of issuing a demand in the demand control device for a refrigerator according to the fourteenth embodiment of the present invention. In the figure, 13a, 13b, 13c, 13d are refrigerated warehouses having different storage capacities, respectively, 13a <13b <1.
3c <13d. Each refrigerated warehouse 13a to 13d
Is input to the input unit 8a and stored in the storage unit 8b. The refrigerated warehouse 13a having a small storage capacity has a large temperature change due to the opening and closing of the door and the like, and has no temperature margin, and the refrigerated warehouse 13d having a large storage capacity has a moderate temperature change and has a temperature margin.

When a demand is generated, the central control unit 8 inputs the demand signal 7A (step 201) in the same manner as in the above embodiment in steps 201 to 203 of the flowchart of FIG. 27, and the central control unit 8 immediately operates the arithmetic unit 8g. Calculates a refrigerated warehouse with a large storage capacity of the storage unit 8b (step 202), and issues a stop command 8A to the refrigerator 9d of the refrigerated warehouse with the largest storage capacity through the output unit 8h (step 203). In the case of releasing the demand, an operation permission command is issued to the refrigerator 9a of the refrigerated warehouse 13a having the smallest storage capacity in the same manner as in the above embodiment.

As described above, out of the plurality of refrigerated warehouses 13 in which the chillers 9 are respectively installed, the chillers in the refrigerated warehouse having a large storage capacity in a large room can be preferentially stopped to perform peak cut control.

Embodiment 15 FIG. FIG. 28 is a block diagram illustrating a configuration of a refrigerator in a refrigerator demand control device according to Embodiment 15 of the present invention. FIG. 29 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 15 of the present invention.
In the figure, reference numeral 18 denotes a temperature sensor provided at the refrigerant inlet of the cooler 17 for detecting the evaporation temperature of the refrigerant liquid. The refrigerant gas from the compressor 14 passes through the condenser 15 and the pressure reducing valve 16 to become a refrigerant liquid, is introduced into the cooler 17, and exchanges heat with the internal air circulated by the fan 17a to cool the internal space. Compressor 1 becomes refrigerant gas by heat exchange
Return to 4. The temperature of the refrigerant inlet of the cooler 17 is indicated by a temperature sensor 18.
When the temperature in the refrigerator is high, the heat exchange rate is high and the evaporation temperature is high.Therefore, there is no room for the temperature in the refrigerator. The temperature is also low, so there is room for temperature inside the refrigerator. The refrigerant evaporation temperature is input to the input unit 8c and stored in the storage unit 8d.

When a demand is generated, the central control unit 8 inputs the demand signal 7A (step 211) in the same manner as in the above embodiment in steps 211 to 213 of the flowchart of FIG. Calculates the refrigerant evaporation temperature in the storage unit 8d (step 212), and issues a stop command 8A to the compressor 14 of the cooler 17 having the lowest refrigerant evaporation temperature through the output unit 8h (step 213). When the demand is released, an operation permission command is issued to the compressor 14 of the cooler 17 having a high refrigerant evaporation temperature in the same manner as in the above embodiment.

As described above, the refrigerator having the low refrigerant evaporation temperature of the cooler 17 installed in each refrigeration warehouse 13 is preferentially stopped to perform the peak cut control.

Embodiment 16 FIG. FIG. 30 is a block diagram showing a configuration of a refrigerator in a refrigerator demand control device according to Embodiment 16 of the present invention. FIG. 31 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 16 of the present invention.
In the fifteenth embodiment, the refrigerant evaporation temperature at the inlet of the cooler is compared, but the refrigerant evaporation pressure may be as shown in FIGS. 30 and 31. In the figure, reference numeral 19 denotes a pressure sensor provided at a refrigerant liquid inlet of the cooler 17, which detects an evaporation pressure of the refrigerant liquid. The refrigerant evaporation temperature at the inlet of the cooler 17 is measured by the pressure sensor 19, and when the internal temperature is high, heat exchange is active and the evaporating pressure is high, so that there is no room temperature margin, and when the internal temperature is low, Since less cooling is required, there is less heat exchange and lower evaporating pressure, so there is room for room temperature. The refrigerant evaporating pressure is determined by the input unit 8.
c and is stored in the storage unit 8d.

When a demand is generated, the compressor 1 of the cooler 17 having the lowest refrigerant evaporating pressure is determined in steps 221 to 223 of the flowchart of FIG.
Then, a stop command 8A is issued to the control unit 4 through the output unit 8h (step 223). In the case of releasing the demand, an operation permission command is issued to the compressor 14 of the cooler 17 having the highest refrigerant evaporation pressure in the same manner as in the above embodiment.

As described above, the refrigerator having the low refrigerant evaporation pressure of the cooler 17 installed in each refrigeration warehouse 13 is preferentially stopped to perform the peak cut control.

[0080]

As described above, according to the first to fifteenth aspects of the present invention, it is possible to secure the quality of the product by minimizing the rise in the temperature of the frozen object due to the peak cut, and to perform the adjustment by the person. This eliminates the need for control and saves labor.

Further, claims 16 to 1 of the present invention
According to 8, there is an effect that legitimate peak cut control can be performed even if the internal temperature cannot be measured due to a failure of the internal temperature sensor or the like.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram showing a demand control device for a refrigerator according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a central control device in the refrigerator demand control device of FIG. 1;

FIG. 3 is a state diagram showing a change in a temperature difference in the refrigerator in the demand control device for a refrigerator according to the first embodiment of the present invention.

FIG. 4 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 1 of the present invention; .

FIG. 5 is a control flowchart at the time of releasing the demand in the refrigerator demand control device according to Embodiment 1 of the present invention;

FIG. 6 is a state diagram showing a refrigerator temperature in the refrigerator demand control device according to Embodiment 2 of the present invention.

FIG. 7 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 2 of the present invention;

FIG. 8 is a state diagram showing a temperature in a refrigerator in a demand control device for a refrigerator according to a third embodiment of the present invention.

FIG. 9 is a control flowchart at the time of issuing a demand in a demand control device for a refrigerator according to a third embodiment of the present invention.

FIG. 10 is a state diagram showing a refrigerator temperature in a demand control device for a refrigerator according to a fourth embodiment of the present invention.

FIG. 11 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 4 of the present invention;

FIG. 12 is a state diagram showing a refrigerator temperature in the refrigerator demand control device according to Embodiment 5 of the present invention.

FIG. 13 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 5 of the present invention.

FIG. 14 is a state diagram showing a refrigerator temperature in the refrigerator demand control device according to Embodiment 6 of the present invention.

FIG. 15 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 6 of the present invention.

FIG. 16 is a state diagram showing a temperature in a refrigerator in a demand control device for a refrigerator according to a seventh embodiment of the present invention.

FIG. 17 is a detailed view of FIG. 16;

FIG. 18 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 7 of the present invention;

FIG. 19 is a control flowchart at the time of issuing a demand in a refrigerator demand control device according to an eighth embodiment of the present invention.

FIG. 20 is a control flowchart at the time of issuing a demand in the demand control device for a refrigerator according to the ninth embodiment of the present invention.

FIG. 21 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 10 of the present invention;

FIG. 22 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 11 of the present invention;

FIG. 23 is a block diagram showing a configuration of a refrigerator in a demand control device for a refrigerator according to a twelfth embodiment of the present invention.

FIG. 24 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 12 of the present invention;

FIG. 25 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 13 of the present invention;

FIG. 26 is a configuration diagram illustrating a storage capacity of a refrigerated warehouse in a refrigerator demand control device according to Embodiment 14 of the present invention;

FIG. 27 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 14 of the present invention;

FIG. 28 is a block diagram showing a configuration of a refrigerator in a refrigerator demand control device according to Embodiment 15 of the present invention.

FIG. 29 is a control flowchart at the time of issuing a demand in the refrigerator demand control device according to Embodiment 15 of the present invention;

FIG. 30 is a block diagram illustrating a configuration of a refrigerator in a refrigerator demand control device according to Embodiment 16 of the present invention;

FIG. 31 is a control flowchart at the time of issuing a demand in a demand control device for a refrigerator according to a sixteenth embodiment of the present invention.

FIG. 32 is a block diagram showing a conventional refrigerator demand control device.

FIG. 33 is a configuration diagram showing a central control device of the refrigerator demand control device of FIG. 32;

FIG. 34 is a control flow chart at the time of issuing a demand in a conventional demand control device for a refrigerator.

FIG. 35 is a control flowchart at the time of canceling demand in the conventional demand control device for a refrigerator.

[Explanation of symbols]

7 Electricity measurement controller, 8 Central controller, 9
Refrigerator, 10 refrigerator controller, 11 temperature sensor, 12 multiplex transmission line, 13 refrigerated warehouse, 17 cooler, 18 temperature sensor, 19 pressure sensor.

Claims (18)

[Claims] 1. A refrigerator for cooling an object to be frozen stored in a plurality of refrigerated warehouses, and an amount of power consumption per unit time of the entire system is monitored, and the amount of power consumption is set to a predetermined value. If it exceeds, a demand signal is issued, and if it becomes less than or equal to the specified value or continues for a certain period of time,
A demand controller for canceling a demand signal; and a central control device to which the demand signal is input from the demand controller, and an operation set temperature of the plurality of refrigerators and a current temperature of the plurality of refrigerators are input. When a demand signal is generated, the central control unit compares the amount of change in the unit operating time between the input operation set temperature of each of the refrigerators and the current temperature of each of the refrigerated warehouses within a unit time, and calculates a refrigerated warehouse with a small temperature difference change. By giving priority to stopping the refrigerators,
A demand control device for a refrigerator, which performs power peak cut control. 2. A refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses and an amount of electric power used per unit time of the entire system are monitored, and the amount of electric power used is set to a predetermined value. If it exceeds, a demand signal is issued, and if it becomes less than or equal to the specified value or continues for a certain period of time,
A demand controller for canceling a demand signal; and a central control device to which the demand signal is input from the demand controller and to which operation set temperatures of the plurality of refrigerators and a current temperature of each of the refrigerated warehouses are input. The controller performs power peak cut control by comparing the input operation set temperatures of the respective refrigerators when a demand signal is generated, and preferentially stopping the refrigerators with lower operation set temperatures. Demand control device for refrigerators. 3. A refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses and an amount of electric power used per unit time of the entire system are monitored, and the amount of electric power used is set to a predetermined value. If it exceeds, a demand signal is issued, and if it becomes less than or equal to the specified value or continues for a certain period of time,
A demand controller for canceling a demand signal; and a central control device to which the demand signal is input from the demand controller and to which operation set temperatures of the plurality of refrigerators and a current temperature of each of the refrigerated warehouses are input. When the demand signal is generated, the control device compares the ON / OFF count of each refrigerator in a unit time calculated based on the input operation set temperature of the refrigerator and the current temperature of the refrigerator, and determines a smaller number of times. A demand control device for a refrigerator, which performs power peak cut control by giving priority to stopping the refrigerator. 4. A refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses and an amount of electric power used per unit time of the whole system are monitored, and the amount of electric power used is set to a predetermined value. If it exceeds, a demand signal is issued, and if it becomes less than or equal to the specified value or continues for a certain period of time,
A demand controller for canceling a demand signal; and a central control device to which the demand signal is input from the demand controller and to which operation set temperatures of the plurality of refrigerators and a current temperature of each of the refrigerated warehouses are input. When the demand signal is generated, the controller compares the time from the stop of each refrigerator to the restart of the refrigerator calculated based on the input operation set temperature of the refrigerator and the current temperature of the refrigerator, and calculates the time value. A demand control device for a refrigerator, characterized in that a refrigerator having a large size is preferentially stopped to perform power peak cut control. 5. A refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses, and an amount of power consumption per unit time of the entire system is monitored, and the amount of power consumption is set to a predetermined value. If it exceeds, a demand signal is issued, and if it becomes less than or equal to the specified value or continues for a certain period of time,
A demand controller for canceling a demand signal; and a central control device to which the demand signal is input from the demand controller and to which operation set temperatures of the plurality of refrigerators and a current temperature of each of the refrigerated warehouses are input. When the demand signal is generated, the control device compares the time from the operation of each refrigerator to the next operation calculated based on the input operation set temperature of the refrigerator and the current temperature of the refrigerated warehouse. A demand control device for a refrigerator, which performs power peak cut control by preferentially stopping a refrigerator having a large value. 6. A refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses and an amount of power consumption per unit time of the whole system, and the amount of power consumption is set to a predetermined value. If it exceeds, a demand signal is issued, and if it becomes less than or equal to the specified value or continues for a certain period of time,
A demand controller for canceling a demand signal; and a central control device to which the demand signal is input from the demand controller and to which operation set temperatures of the plurality of refrigerators and a current temperature of each of the refrigerated warehouses are input. When the demand signal is generated, the controller compares the continuous operation time of each refrigerator calculated based on the input operation set temperature of the refrigerator and the current temperature of the refrigerator, and calculates the refrigerator having a larger time value. A demand control device for a refrigerator, characterized in that a power peak cut control is performed by giving priority to stopping. 7. A refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses and an amount of electric power used per unit time of the whole system are monitored, and the amount of electric power used is set to a predetermined value. If it exceeds, a demand signal is issued, and if it becomes less than or equal to the specified value or continues for a certain period of time,
A demand controller for canceling a demand signal; and a central control device to which the demand signal is input from the demand controller and to which operation set temperatures of the plurality of refrigerators and a current temperature of each of the refrigerated warehouses are input. When the demand signal is generated, the control device compares the temperature rise rate after the operation stop of each refrigerator calculated based on the input operation set temperature of the refrigerator and the current temperature of the refrigerator warehouse,
A demand control device for a refrigerator, characterized in that the refrigerator having a low temperature rise rate is preferentially stopped to perform power peak cut control. 8. The demand for a refrigerator according to claim 7, wherein a temperature rise rate after the operation is stopped is stored and a temperature value after a lapse of a predetermined time is predicted according to a storage situation in the refrigerated warehouse. Control device. 9. A refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses and an amount of electric power used per unit time of the entire system are monitored, and the amount of electric power used is set to a predetermined value. If it exceeds, a demand signal is issued, and if it becomes less than or equal to the specified value or continues for a certain period of time,
A demand controller for canceling a demand signal, and a central control device to which the demand signal is input from the demand controller, and a storage and retrieval amount of the frozen objects in the plurality of refrigerated warehouses is input, and the central control device includes: When a demand signal is generated, the input / output amount of the refrigerated material in the refrigerated warehouse is compared, and the refrigerator in the refrigerated warehouse having the smaller amount of the refrigerated material is stopped and prioritized to stop the power peak. A demand control device for a refrigerator characterized by controlling. 10. A refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses and an amount of electric power used per unit time of the entire system, and the amount of electric power used is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
An opening / closing number detecting device for detecting the number of opening / closing times of the doors of each refrigerated warehouse in a unit time, and the demand signal is input from the demand controller, and the opening / closing number detecting device detects the number of opening / closing times of the doors of each refrigerated warehouse in a unit time A central control unit for inputting the number of times of opening and closing, wherein the central control unit compares the number of times of opening and closing of the doors of each refrigerated warehouse inputted in a unit time when a demand signal is generated; A demand control device for a refrigerator, characterized in that electric power peak cut control is performed by preferentially stopping the refrigerator. 11. A refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses and an amount of power consumption per unit time of the entire system is monitored, and the amount of power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
An opening time detecting device for detecting an opening time of the door of each refrigerated warehouse in a unit time, and the demand signal is input from the demand controller, and the opening time detecting device detects the opening time of the door of each refrigerated warehouse in the unit time. A central controller for inputting the opening time, wherein the central controller compares the input opening time of the door of each refrigerated warehouse within a unit time when the demand signal is generated, and the refrigerated warehouse having a shorter opening time. A demand control device for a refrigerator, characterized in that electric power peak cut control is performed by preferentially stopping the refrigerator. 12. A refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses and an amount of power consumption per unit time of the whole system is monitored, and the amount of power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
An opening / closing detection device for detecting opening / closing of the door of each refrigerated warehouse,
The demand signal is input from the demand controller, and the current temperature of each of the refrigerated warehouses is input, and the central control device is provided with the opening and closing time of each of the refrigerated warehouse doors by the open / close detection device, When a demand signal is generated, the central controller compares the temperature difference between the temperature immediately after the door is opened and the temperature immediately after the door is closed when the demand signal is generated. A demand control device for a refrigerator, characterized in that a peak stop control is performed by giving priority to a stop. 13. A refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses and an amount of electric power used per unit time of the entire system are monitored, and the amount of electric power used is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
A frost state detection device for detecting a frost state of a cooler of each refrigerator based on a drive current value of a fan provided in the cooler; and the demand signal is input from the demand controller to detect the frost state. A central controller for inputting the frost state of the cooler of each refrigerator by a device, wherein the central controller compares the input frost state of the cooler of each refrigerator when a demand signal is generated. Then, by preferentially stopping the refrigerator of the cooler with less frost,
A demand control device for a refrigerator, which performs power peak cut control. 14. A refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses and an amount of power consumption per unit time of the whole system is monitored, and the amount of power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
A frost state detection device that detects a frost state of a cooler of each refrigerator by a drive current value of a fan provided in the cooler, and the frost state of the cooler of each refrigerator becomes a predetermined state. A defrosting device that performs a defrosting operation, and a central control device to which the demand signal is input from the demand controller and the number of defrosting operations per unit time of a cooler of each refrigerator is input; When a demand signal is generated, the central control unit compares the input defrosting operation times of the refrigerators of the respective refrigerators in the unit time, and gives priority to the refrigerators of the refrigerators having a smaller number of defrosting operations in the unit time. A demand control device for a refrigerator, wherein power peak cut control is performed by stopping the operation. 15. A refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses and an amount of power consumption per unit time of the entire system is monitored, and the amount of power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
A central controller for receiving the demand signal from the demand controller and receiving the storage capacities of the plurality of refrigerated warehouses, wherein the central controller controls the input storage capacity of each refrigerated warehouse when a demand signal is generated. By comparing
A demand control device for a refrigerator, characterized in that a refrigerator in a refrigerated warehouse having a large storage capacity is preferentially stopped, thereby performing power peak cut control. 16. A refrigerator for cooling a frozen object stored in a plurality of refrigerated warehouses, and an amount of power consumption per unit time of the entire system is monitored, and the amount of power consumption is set to a predetermined value. A demand controller that issues a demand signal when the signal exceeds the specified value, and releases the demand signal if the state becomes equal to or less than a specified value or continues for a predetermined time,
The demand signal is input from the demand controller, and comprises a central control device to which a characteristic value corresponding to the plurality of refrigerated warehouse temperatures is input, wherein the central control device includes:
Refrigeration machine characterized by comparing the input characteristic value of each refrigerated warehouse when a demand signal is generated, and prioritizing and stopping a predetermined refrigerator in accordance with the characteristic value, thereby performing power peak cut control. Demand control device. 17. The demand control device for a refrigerator according to claim 16, wherein the characteristic value is a refrigerant evaporation temperature of the cooler. 18. The demand control device for a refrigerator according to claim 16, wherein the characteristic value is a refrigerant evaporation pressure of a cooler.