JP2000205628A - Power control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To deal with temporary increase of power consumption by providing means for controlling the total power consumption not to exceed a receivable power by reducing power consumption of predetermined apparatus in a shop when a detected total power consumption reaches a preset value within the range of receivable power. SOLUTION: A shop illuminator 1, a showcase illuminator 2, an air conditioner 3 and a low temperature apparatus 4 are connected with a power line 5 which is connected with a detector 6 for detecting total power consumption of the apparatus 1-4. The detector 6 is connected with a power controller 7 which is connected to transmit a control signal to each apparatus 1-4 through a shop illuminator controller 8, a showcase illuminator controller 9, an air conditioner controller 10 and a low temperature apparatus controller 11. During operation control through the power controller 7, a heat source machine for the illuminators 1, 2, the air conditioner and the low temperature apparatus is set sequentially in lower power state so that total power consumption falls within the receivable power.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power control system and, more particularly, to a measure for reducing power consumption in a store such as a supermarket or a convenience store.

[0002]

2. Description of the Related Art Conventionally, in stores such as supermarkets and convenience stores, comparison of power consumption of air conditioners, low-temperature equipment such as showcases, lighting equipment for stores and showcases, and microwave ovens and copy machines. Several large devices are used.

On the other hand, it is not realistic for the power receiving equipment of a store to have a power receiving capacity that allows all these devices to operate at the maximum capacity because of the cost and installation space. At the time of introduction, receivable power (contracted power) is determined with some margin for the total power consumption when each device is used normally, and equipment that matches the receivable power is selected. ing.

[0004]

However, when the air conditioner is fully operated, for example, during the daytime in summer, additional products are put into the showcase, and other devices such as a microwave oven and a copier are also used at the same time. In a state of use, power consumption may temporarily increase and exceed the power receiving capacity. Conventionally, in order to avoid such a situation, it has been necessary to set a relatively sufficient power receiving capacity or to limit the types and quantities of devices installed in the store.

[0005] The present invention has been made in view of such problems, and it is an object of the present invention to increase the power receiving capacity in a store such as a supermarket or a convenience store more than necessary, or in a store. It is an object of the present invention to be able to cope with a temporary increase in power consumption without limiting the type and number of devices to be installed.

[0006]

SUMMARY OF THE INVENTION According to the present invention, when a total power consumption of a store exceeds a certain set value, a predetermined device in the store is used.
The power consumption at (1,2,3,4) is reduced so that the total power consumption does not exceed the receivable power.

Specifically, the first solution taken by the present invention presupposes a power control system for controlling the power consumption of the store equipment (1, 2, 3, 4). The power control system includes a detecting means (6) for detecting the total power consumption in the store, and the total power consumption detected by the detecting means (6) being set to a predetermined value within a range of the receivable power. The control means (7) for controlling the power consumption of the predetermined devices (1, 2, 3, 4) in the store when the power consumption is reached so that the total power consumption does not exceed the receivable power.

[0008] A second solution taken by the present invention is:
The first solution, wherein the predetermined device includes an in-store lighting device (1) capable of adjusting an applied voltage, and the control device (7)
Is configured to control the total power consumption by adjusting the applied voltage of the lighting fixture (1).

Further, a third solution taken by the present invention is:
In the first solution, the control device includes a lighting device (2) for a low-temperature device capable of adjusting an applied voltage as the predetermined device.
(7) is configured to control the total power consumption by adjusting the voltage applied to the lighting fixture (2).

[0010] A fourth solution taken by the present invention is:
In the first solution, the air conditioner heat source unit (21) having a variable capacity is included as the predetermined device, and the control unit (7) controls the total power consumption by adjusting the capacity of the heat source unit (21). It is configured as follows.

Further, a fifth solution taken by the present invention is:
In the first solution, the predetermined means includes a heat source device (43, 55) for a low-temperature device having a variable capacity as the predetermined device, and the control means (7) comprises:
The total power consumption is controlled by adjusting the capacity of the heat source units (43, 55).

Further, a sixth solution taken by the present invention is:
In the first solving means, as the predetermined equipment, the heat source equipment for air conditioner (21) and the heat source equipment for low temperature equipment (43, 55) having variable capacity are used.
When the power consumption of one of the air conditioner (3) and the low-temperature device (4) increases and the total power consumption of the store reaches a predetermined value, the control means (7) includes the other heat source device. The total power consumption is controlled by reducing the capacity of the power supply.

[0013] A seventh solution taken by the present invention is:
In the first solution, the in-store lighting device (1) capable of adjusting an applied voltage and the low-temperature device lighting device are provided as the predetermined devices.
(2) and a variable capacity air conditioner heat source device (21) and a low temperature device heat source device (43, 55), and control means (7), when the total power consumption of the store reaches a predetermined value, The total power consumption of the in-store lighting equipment (1), low-temperature equipment lighting equipment (2), air conditioner heat source equipment (21), and low-temperature equipment heat source equipment (43, 55) does not exceed the receivable power. As described above, the power consumption is controlled by sequentially setting the power consumption to the low power state.

In the first solving means, when the detecting means (6) detects that the total power consumption in the store has reached a predetermined value, the controlling means (7) controls the equipment (1) in the store. , 2, 3, 4) are controlled so as to reduce the power consumption. Therefore, if the predetermined value is set to a value slightly smaller than the receivable power, it is possible to prevent the total power consumption from exceeding the receivable power.

At the time of the power control, in the second solution, the voltage applied to the in-store lighting device (1) is adjusted, and the third voltage is adjusted.
In the above solution, the voltage applied to the illuminator for low temperature equipment (2) is adjusted, and in the fourth solution, the heat source device for air conditioner (21) is adjusted.
In the fifth solution, the capacities of the low-temperature equipment heat source units (43, 55) are adjusted so that the total power consumption of the stores does not exceed the receivable power. .

In the above-mentioned sixth solution, the air conditioner
When the power consumption of one of (3) and the low-temperature equipment (4) increases and the total power consumption of the store reaches a predetermined value, the control means (7)
Accordingly, the capacity of the heat source device of the other device is controlled to be reduced, and the total power consumption is kept within the range of the receivable power. In other words, if the power consumption of low-temperature equipment (4) such as showcases (41, 42) increases after product introduction or defrost operation, the capacity of the heat source unit (21) of the air conditioner (3) is reduced. Conversely, if the power consumption of the air conditioner (3) increases at startup, etc., the heat source unit (43,
55), the total power consumption is adjusted.
Even when the capacity of the low-temperature equipment (4) is reduced in this way, from the viewpoint of product protection, measures such as controlling the degree of the capacity reduction and shortening the time of the capacity reduction operation are taken. Good to put.

[0017] In the seventh solving means, when the total power consumption of the store reaches a predetermined value, the control means (7) causes
The applied voltage of the in-store lighting equipment (1), the applied voltage of the lighting equipment for low temperature equipment (2), the capacity of the heat source equipment for air conditioners (21), and the capacity of the heat source equipment for low temperature equipment (43, 55) are adjusted in order. Then, the total power consumption falls within the range of receivable power. If, for example, the purpose of keeping the total power consumption within the receivable power range only by adjusting the applied voltage of the in-store lighting equipment (1) is reached, the applied voltage of the low-temperature equipment lighting equipment (2) can be reduced. The capacities of the air conditioner heat source unit (21) and the low-temperature equipment heat source units (43, 55) do not need to be adjusted.

[0018]

According to the first to fifth solutions,
Even if the power consumption of the store temporarily increases, other equipment (in-store lighting equipment (1), low-temperature equipment lighting equipment (2), air conditioner heat source equipment (21), and low-temperature equipment heat source equipment ( 43,55) The power consumption can be adjusted to keep the total power consumption within the receivable power. Therefore, it is not necessary to increase the power receiving capacity more than necessary in order to temporarily increase power consumption, or to limit the type and quantity of equipment (1, 2, 3, 4) installed in the store .

According to the sixth solution, when the power consumption of the low-temperature equipment (4) increases, the total power consumption is suppressed while the operation state of the low-temperature equipment (4) is maintained. When the power consumption of the air conditioner (3) increases, the total power consumption can be suppressed while maintaining the operation state of the air conditioner (3).

According to the seventh solution, first, the voltage applied to the in-store lighting equipment (1) and the lighting equipment for low-temperature equipment
Since the applied voltage of (2) is adjusted, if the total power consumption can be controlled so as not to exceed the receivable power at this stage, the air conditioner and low-temperature equipment can be operated normally,
It does not impair the store's comfort or the shelf life of the product. At this stage, even if the control is insufficient,
Since the capacity of the low-temperature equipment (4) is finally adjusted after adjusting the capacity of (3), the products in the low-temperature equipment (4) can be protected to the end even during power control.

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a functional block diagram of the power control system. This system can be used in stores such as supermarkets and convenience stores, for in-store lighting (1), showcase lighting (low-temperature equipment lighting).
(2), an air conditioner (3), and a low-temperature device (4) (refrigerated showcase and frozen showcase) are configured as a system for controlling.

In-store lighting fixtures (1), showcase lighting fixtures
(2) The air conditioner (3) and the low-temperature equipment (4)
(5), and the power line (5) is connected to these devices (1,
A detection device (detection means) (6) for detecting the total power consumption of the store by (2, 3, 4) is connected. The detection device (6) is connected to a power control device (control means) (7), and the power control device (7) includes an in-store lighting control device (8), a showcase lighting control device (9), an air conditioner control device. Control signals are transmitted to the in-store lighting equipment (1), the showcase lighting equipment (2), the air conditioner (3), and the low-temperature equipment (4) via the device (10) and the low-temperature equipment control device (11). Connected as possible.

FIG. 2 shows a first refrigeration circuit (20) for the air conditioner (3).
And a second refrigeration circuit (40) for the low-temperature equipment (4). The first refrigeration circuit (20) is configured as a vapor compression unit refrigeration cycle, and includes a compressor (21), an outdoor heat exchanger (22), an outdoor expansion valve (23), and an indoor expansion valve (24). And, indoor heat exchanger (25)
And an accumulator (26) and a four-way switching valve (27),
These devices are connected by refrigerant piping. In addition,
The four-way switching valve (27) is provided on the discharge side of the compressor (21), and is capable of switching the refrigerant circulation direction between a normal cycle for performing a cooling operation and a reverse cycle for performing a heating operation.

The compressor (21), the outdoor heat exchanger (22), the expansion valve (2
3), the accumulator (26), and the four-way switching valve (27) are arranged in a heat source unit (outdoor unit) (28). The indoor expansion valve (24) and indoor heat exchanger (25) are indoor units.
(29). And the indoor unit (29)
Three units are connected in parallel to the heat source unit (28).

The compressor (21), which is a heat source unit, is configured to have a variable capacity by an air conditioner control device (10) such as an inverter or an unload mechanism in order to control the capacity. This air conditioner control device (10) is, as described above, a power control device (7)
Is connected to

On the other hand, the second refrigeration circuit (40) is configured to drive the refrigerated showcase (41) and the refrigerated showcase (42).
A vapor compression binary refrigeration cycle and a unitary refrigeration cycle coexist. Specifically, the heat source unit (4) including the compressor (43), the heat source side heat exchanger (44), and the accumulator (45)
6), two use side heat exchangers (47) and two refrigerant heat exchangers (48) are connected in parallel to form a high temperature side refrigerant circuit (49). (49), each refrigerant heat exchanger (4
The low temperature side refrigerant circuit (50) is connected via 8). It should be noted that expansion valves (51, 52) are arranged upstream of each of the use side heat exchangers (47) and each of the refrigerant heat exchangers (48).

Each refrigerant heat exchanger (48) is connected to a high-temperature side refrigerant circuit (4
9) and a condenser (5) for the low-temperature side refrigerant circuit (50).
4) and are integrally provided. And the low temperature side refrigerant circuit (50)
Is a compressor (55), a condenser (54) of the refrigerant heat exchanger (48),
A closed circuit is formed by connecting the expansion valve (56) and the use-side heat exchanger (57) with a refrigerant pipe. The refrigerant heat exchanger (48) and the low-temperature side compressor (55) are provided in the cascade unit (58).

In this embodiment, each use-side heat exchanger (47) on the high-temperature side is built in the refrigerated showcase (42), and each use-side heat exchanger (57) on the low-temperature side is connected to the freezer showcase (41). It is built in. These heat exchangers (47, 57) are configured to be able to supply cold air to a display space for foods and the like in the showcases (42, 41) by a blower (not shown).

The high-temperature side compressor (43) and the low-temperature side compressor (55), which are the heat source units, perform capacity control in the same manner as the compressor (21) for the air conditioner (3). The capacity is variable by a low-temperature equipment control device (11) such as an unload mechanism. The low-temperature equipment control device (11) is connected to the power control device (7) as described above.

When the total power consumption detected by the detection device (6) reaches a predetermined value within the range of receivable power, the power control device (7) starts to operate each device (1, 2) in the store. ,
The power consumption is reduced so that the total power consumption does not exceed the receivable power. Specifically, the power control device (7) controls the in-store lighting device (1),
Showcase lighting equipment (2), air conditioner heat source equipment (21), and low-temperature equipment heat source equipment (43, 55) are sequentially reduced in power so that the total power consumption falls within the receivable power (power saving). Set state to control total power consumption.

-Driving operation-Next, the driving operation in this system will be described.

First, usually, the air conditioner (3) performs the cooling / heating operation, and the refrigeration showcase (42) and the refrigeration showcase (41) perform the refrigeration operation and the freezing operation without power saving.

During the cooling operation by the air conditioner (3), the four-way switching valve (2
7) is set to the state shown by the solid line in FIG. 2, the outdoor expansion valve (23) is fully opened, and the indoor expansion valve (24) is controlled in opening such as superheat. In this state, the high-pressure gas refrigerant discharged from the compressor (21) enters the outdoor heat exchanger (22) via the four-way switching valve (27), and is condensed and liquefied in the outdoor heat exchanger (22). I do. This liquid refrigerant is decompressed by the indoor expansion valve (24), and then is cooled by the indoor heat exchanger (2).
In 5), the room air is cooled and evaporated, and returns to the compressor (21) as a gas refrigerant. By repeating this circulation, the room is cooled.

During the heating operation of the air conditioner (3), the four-way switching valve (27) is set to the state shown by the broken line in FIG.
Is fully open, and the outdoor expansion valve (24) is controlled in opening such as degree of superheat. Therefore, the high-pressure gas refrigerant discharged from the compressor (21) enters the indoor heat exchanger (25) via the four-way switching valve (27),
The indoor heat exchanger (25) exchanges heat with indoor air to condense and liquefy. The air warmed during this heat exchange is blown into the room, and the room is heated. Meanwhile, indoor heat exchanger
The liquid refrigerant leaving (25) is decompressed by the outdoor expansion valve (23),
It evaporates in the outdoor heat exchanger (22) to become a gas refrigerant, and returns to the compressor (21) via the four-way switching valve (27) and the accumulator (26). The above operation is repeated during the heating operation.

Refrigerated showcase (42) and frozen showcase
The refrigeration operation and the freezing operation in (41) are performed as follows. First, in the high-temperature side refrigerant circuit (49), the compressor (43)
The high-pressure gas refrigerant discharged from the heat-source-side heat exchanger (44) is condensed in the heat-source-side heat exchanger (44), and then passes through each expansion valve (51, 52).
(47) and flows into each refrigerant heat exchanger (48). User side heat exchanger
In (47), the refrigerant exchanges heat with air to cool the air, and low-temperature air is supplied into the refrigerated showcase (42).
Then, the refrigerant gasified by the heat exchange at this time returns to the compressor (43) via the accumulator (45), and one cycle is completed.

In each of the refrigerant heat exchangers (48), heat is exchanged between the refrigerant in the high-temperature side refrigerant circuit (49) and the refrigerant in each of the low-temperature side refrigerant circuits (50). It is gasified by the exchanger (48) and returns to the compressor (43). Then, the low-temperature side refrigerant circuit (5
(0), after being discharged from the compressor (55), the refrigerant heat exchanger (4)
The refrigerant liquefied in the condensing section (54) of (8) is decompressed by the expansion valve (56) and then evaporates in the use side heat exchanger (57) to cool the air in the freezing showcase (41). As described above, in each freezing showcase (41), the food and the like are maintained at a predetermined low temperature by the freezing operation of the dual freezing cycle.

On the other hand, in this system, each device (1, 2, 3,
The total power consumption is constantly checked so that the total power consumption by 4) does not exceed the receivable power, and it is determined whether the total power consumption has a margin with respect to the receivable power. FIG. 3 shows a flowchart in which the size of the margin of the receivable power with respect to the total power consumption is determined, and power saving and cancellation are performed based on the determination result.

First, in step ST1, the power a currently receiving power is detected. Next, in step ST2, the power a currently receiving power is changed from the receivable power A to the first margin value b1.
Is determined to be less than or equal to the value obtained by subtracting. If the result of the determination is No, there is not much room, and in step ST3, the power save mode shown in detail in FIG. 5 is entered.

When the determination result of step ST2 is Yes,
That is, if the margin is larger than b1, in step ST4, it is determined whether or not the current total power consumption a is equal to or smaller than a value obtained by subtracting the second margin value b2 from the receivable power A. If the determination result is Yes, that is, if the margin is further larger than b2, the power save release mode shown in detail in FIG. 6 is entered in step ST5. If the determination result in step ST4 is No, that is, the margins are b1 and b2. If the value is in the range between, step ST1 and subsequent steps are repeatedly executed without changing the operation mode.

FIG. 4A shows a state in which the operation mode is switched in this manner. As shown in the figure, when the received power a increases in the normal mode and reaches A-b1, the mode is switched to the power save mode. On the other hand, when the received power a decreases to A-b2 in the power save mode, the mode returns to the normal mode. Will do.

Next, referring to FIG. 5, step ST in FIG.
3 will be described. In addition, among the symbols used in this flowchart, x (lower case) is a measured value of the in-store illuminance, and X (upper case) is a reference value (setting) for determining whether or not to perform power saving based on the in-store illuminance. Value) and X0 are margin values. Also, T
a is a measured value of the store temperature, TA is a reference value (set value) for determining whether or not to perform power saving based on the store temperature,
TA1 represents a margin value.

F1 to F5 are flags. F1
Is a flag indicating the state of the voltage applied to the in-store lighting equipment (1).
0 indicates a normal state and 1 indicates a power saving state. F2 is a flag indicating the state of the applied voltage of the showcase lighting device (2), where 0 indicates a normal state and 1 indicates a power saving state. F3 is a flag indicating the operating state of the air-conditioning heat source device (21), where 0 is a normal state, and 1 to Z indicate a state in which power saving is performed in any of the first to Z-th stages. F4 is a flag indicating the state of the low-temperature equipment heat source units (43, 55), where 0 indicates a normal state and 1 indicates a power saving state. And F5 is 1
, The in-store lighting device (1), the showcase lighting device (2), and the low-temperature device (4) are all in the power saving state, and the air conditioner (3) has the measured in-store temperature value Ta. Is not sufficiently low or the flag F3 is set to Z, indicating that power saving should not be performed.

When the power saving mode is entered, first, in step ST11, it is determined whether or not the margin of the measured value x with respect to the in-store illuminance reference value X is larger than the set margin value X0. If the margin of illuminance is larger than X0 and the inside of the store is sufficiently bright, the applied voltage of the in-store lighting device (1) is reduced in step ST12 (see FIG. 4B), the flag F1 is set to 1, and the flag F5 is set. Set to 0 to end power save mode. That is, step ST1 and subsequent steps in FIG. 3 are repeatedly executed.

After returning to the flow of FIG.
Depending on the result of the determination in ST2, the power save mode of FIG. 5 may be executed again. In that case, in-store lighting fixtures
The voltage of (1) has already dropped. Therefore, except for a bright daytime or the like, as a result of the determination in step ST11, it is determined that the in-store illuminance is not sufficient.

Then, the process proceeds to step ST13, where it is determined whether or not the flag F2 is "0". This flag F2
Is 0, the voltage of the showcase lighting fixture (2) is in the normal state, and thus the applied voltage of the showcase lighting fixture (2) is reduced in step ST14 to save power. Then, the flag F2 is set to 1 and the flag F5 is set to 0 to end the power saving mode, and the process returns to step ST1 in FIG.

If it is determined in step ST13 that the flag F2 is 1 and the voltage of the showcase lighting device (2) has already been lowered, for example, when returning to the flow of FIG. 5 again. , Flag F5 in step ST15
Is 1 or not. As long as the operation described so far is performed, the flag F5 is 0 at this time. Therefore, the process proceeds to step ST16.

At step ST16, the actual measured value T of the in-store temperature
It is determined whether or not a is a sufficiently low temperature equal to or lower than the set value TA-TA1 (in the case of cooling operation) and whether or not the flag F3 has not reached the upper limit value Z of the number of power saving steps. If both of these conditions are satisfied, the process proceeds to step ST17, and the power saving operation of the air conditioner heat source device (21) is advanced by one stage. Then, 1 is added to the flag F3, the flag F5 is set to 0, the power saving mode is ended, and the process returns to the flow of FIG. 3 (for switching of the air conditioning capacity, see FIG. 4C).

Conversely, if at least one of the determination conditions in step ST16 is not satisfied, power saving in the air conditioner (3) is abandoned, and the process proceeds to step ST18 to determine whether or not the flag F4 is 0. That is, it is determined whether the low-temperature heat source unit (43, 55) is in a normal state. If it is in the normal state, the power saving of the low-temperature heat source unit (43, 55) is executed in step ST19, the flag F4 is set to 1 and the flag F5 is set to 0, and the power saving mode is ended.

If it is determined in step ST18 that the low-temperature equipment heat source unit (43, 55) is already in the power saving state, the flag F5 is set to 1 in step ST20 to save the power. Exit the mode. In other words, in this case, the determination results in steps ST11, ST13, ST15, ST16, ST18 are all No, and the power saving mode is exited by simply changing the flag F5 without performing any power saving operation. Become.

In this case, returning to the flow of FIG.
As a result of executing ST2, when the power saving mode is entered again, the process proceeds from step ST15 in FIG. 5 to step ST17, in which the capacity of the air conditioner (3) is forcibly reduced by one step to exit the power saving mode.

Note that, at this time, if the flag F3 is already set to Z
, The capacity of the air conditioner (3) cannot be further reduced. Therefore, assuming such a case, a step is provided for determining whether or not the flag F3 is Z before entering step ST17. If F3 = Z, the air conditioner (3) is forcibly stopped. It is also possible to control as follows. However, a situation in which the air conditioner is stopped for power saving occurs because the power receiving capacity is too small. Usually, in each store, a power receiving capacity that does not cause such a situation is set. .

On the other hand, when entering the power save release mode in step ST5 of FIG. 3, the process proceeds to the flowchart shown in FIG. 6, and it is first determined in step ST21 whether the flag F4 is 1. When the flag F4 is 1 and it is detected that the low-temperature equipment heat source unit (43, 55) is in the power saving mode, in step ST22, the low-temperature equipment heat source unit (43, 55)
55) Cancel the power save of and set F4 to 0. Further, in step ST23, the flag F5 is set to 0 to end the power save release mode, and the steps from step ST1 in FIG. 3 are repeated. Also in this case, the power save release mode may be repeatedly executed depending on the determination result in each step of the flow in FIG.

In step ST21, the flag F4 is set to 0.
Is detected, and it is determined that the low-temperature equipment heat source device (43, 55) is not in the power saving state, then the process proceeds to step ST24.
Whether the actual measured value Ta of the in-store temperature is higher than the set value TA + TA1 (in the case of cooling operation),
It is determined whether or not the flag F3 is 1 or more, that is, whether or not the power is being saved. If the determination result is Yes, the number of power saving steps of the air conditioner heat source device (21) is returned by one in step ST25 to increase the operation capability (see FIG. 4C), and the flag F5 is set to 0 in step ST23. To exit the power save release mode.

If the result of the determination in step ST24 is No, the process proceeds to step ST26, where it is determined whether or not the flag F2 is 1. If the flag F2 is 1, the voltage applied to the showcase lighting device (2) is low. Therefore, in that case, the applied voltage is returned to the normal value in step ST27, the flag F2 is set to 0, and furthermore, in step ST2.
In step 3, the flag F5 is set to 0, and the power save release mode ends.

The result of the determination in step ST26 is N
If it is determined in o that the applied voltage of the lighting device for a showcase (2) has not decreased, the process proceeds to step ST28, and it is determined whether or not the measured value x of the in-store illuminance is smaller than the set value X-X0. I do. If the illuminance is low and the interior of the store is dark, the voltage applied to the in-store illuminator (1) is returned to the normal value in step ST29, and the flag F1 is set to 0.
To set the flag F5 to 0 and then exit the power save release mode. The measured value x of the in-store illuminance is equal to the set value X-
If it is larger than X0, the flag F5 is set in step ST23.
Is set to 0 to end the power saving mode and return to the flow of FIG.

In the above-described power saving mode, if the air conditioner can be forcibly stopped depending on the situation when the process proceeds from step ST15 to step ST17, the power saving release mode corresponds to The air conditioner is configured to be able to be started from the forced stop state.

-Effects of Embodiment- According to this embodiment, when the power consumption temporarily increases in the store, the in-store lighting device (1) and the showcase lighting device (2).
, Air conditioner heat source equipment (21), and showcase heat source equipment (4
3, 55) are controlled by the power control device (7) so as to sequentially decrease in accordance with the conditions shown in the flowchart of FIG. Therefore, it is possible to prevent the total power consumption from exceeding the receivable power without increasing the capacity of the power receiving facility more than necessary or restricting the types and the number of devices installed in the store.

The heat source unit (4) for the showcases (41, 42)
3,55) of lighting equipment for in-store and showcase
(1, 2) and the heat source unit for air conditioning (21), etc., are adjusted last, so even if power control is required, protection of food etc. in the showcase (41, 42) You can work to the end. In addition, since the power saving is canceled from the showcase (41, 42), food and the like can be protected in that respect as well.

[0060]

Other Embodiments of the Invention The present invention may be configured as follows with respect to the above embodiment.

For example, in the above embodiment, when the total power consumption of the store reaches a predetermined value, the applied voltage of the in-store lighting device (1), the applied voltage of the showcase lighting device (2), the heat source device for the air conditioner, etc. The capacity of (21) and the capacity of the heat source equipment for low-temperature equipment (43, 55) are sequentially adjusted by the power control device (7) so that the total power consumption does not exceed the receivable power. apparatus
(7) means that when the power consumption of one of the air conditioner (3) and the low-temperature equipment (4) increases and the total power consumption of the store reaches a predetermined value,
You may comprise so that the capability of the heat source device of the other apparatus may be reduced. By doing so, it is possible to prevent the total power consumption from exceeding the receivable power while maintaining the temporarily increased capacity of the device.

In the above embodiment, when the total power consumption of the store reaches a predetermined value, the in-store lighting device (1), the showcase lighting device (2), and the air conditioner are controlled by the power control device (7). Heat source equipment (21) and low temperature equipment heat source equipment (43,55)
Although it is configured to control the types of devices, it is not always necessary to configure to control all of these devices, and it may be configured to control at least one type to adjust the total power consumption. It is possible. Conversely, it is also possible to configure to control devices other than these four types, such as a microwave oven and a copy machine.

In the above embodiment, the showcase (4
When power saving is performed for (1, 42), multiple showcases (41, 42) are used to control the capacity at the same time, but for example, each showcase may be one or several different heat sources. Machine to be driven by
It may be performed separately for each or several units.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a power control system according to an embodiment of the present invention.

FIG. 2 is a refrigerant circuit diagram of an air conditioner and a low-temperature device to which the power control system of FIG. 1 is applied.

FIG. 3 is a flowchart showing an operation state of the power control system of FIG.

4 (a) to 4 (c) are diagrams showing switching of operation modes in the power control system of FIG.

FIG. 5 is a flowchart illustrating a power save mode of the power control system of FIG. 1;

FIG. 6 is a flowchart showing a power save release mode of the power control system of FIG. 1;

[Explanation of symbols]

 (1) Lighting for stores (2) Lighting for showcases (lighting for low-temperature equipment) (3) Air conditioners (4) Low-temperature equipment (6) Ground inspection equipment (detection means) (7) Power control equipment (control means (21) Compressor (heat source unit for air conditioner) (43,55) Compressor (heat source unit for low-temperature equipment)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Tanimoto 1304 Kanaokacho, Sakai City, Osaka Prefecture Daikin Industries, Ltd. Sakai Seisakusho Kanaoka Factory F-term (reference) 3L060 AA03 CC10 DD01 DD02 DD05 EE04

Claims (7)

[Claims] 1. A power control system for controlling power consumption of equipment (1, 2, 3, 4) provided in a store, comprising: a detecting means (6) for detecting a total power consumption in the store.
When the total power consumption detected by the detection means (6) reaches a predetermined value set in advance within the receivable power range, the power consumption of the predetermined devices (1, 2, 3, 4) in the store is reduced. Control means for reducing the total power consumption so as to prevent the total power consumption from exceeding the receivable power. 2. The predetermined device includes an in-store lighting fixture (1) capable of adjusting an applied voltage, and a control means (7) controls the total applied power by adjusting the applied voltage of the lighting fixture (1). The power control system according to claim 1, wherein the power control system is configured as follows. 3. A predetermined device includes an illuminator (2) for a low-temperature device capable of adjusting an applied voltage, and a control means (7) adjusts an applied voltage of the illuminator (2) to control total power consumption. The power control system according to claim 1, wherein the power control system is configured to perform the power control. 4. A predetermined device is a heat source unit for an air conditioner having a variable capacity (2).
The power control system according to claim 1, further comprising: (1), wherein the control means (7) is configured to adjust the capacity of the heat source device (21) to control the total power consumption. 5. A heat source device for a low-temperature device, wherein the predetermined device has a variable capacity.
The power control system according to claim 1, further comprising: (43, 55), wherein the control means (7) is configured to adjust the capacity of the heat source unit (43, 55) to control the total power consumption. 6. A predetermined equipment is a heat source unit for an air conditioner having a variable capacity.
(21) and the heat source equipment for low-temperature equipment (43, 55) .The control means (7) increases the power consumption of either the air conditioner (3) or the low-temperature equipment (4), and 2. The system according to claim 1, wherein when the power reaches a predetermined value, the capacity of one of the other heat source units is reduced to control the total power consumption.
A power control system as described. 7. The predetermined equipment includes an in-store lighting equipment (1) and a low-temperature equipment lighting equipment (2) capable of adjusting an applied voltage, a variable-capacity heat source equipment for an air conditioner (21) and a heat source equipment for a low-temperature equipment. When the total power consumption of the store reaches a predetermined value, the control means (7) includes an in-store lighting device (1), a low-temperature device lighting device (2), and an air conditioner heat source device. (21), and the low-temperature equipment heat source units (43, 55) are sequentially set to a low power state to prevent the total power consumption from exceeding the receivable power, so as to control the total power consumption. The power control system according to claim 1, wherein the power control system is configured.