JP2011076801A - Lighting control device, lighting system, and lighting control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent rise of a demand peak after end of defrosting of a refrigerator while an interior illuminance ratio to an interior space of the refrigerator is not brought to become small so that appeal of displayed products in the refrigerator is not lowered and purchase willingness of consumers is not faded. <P>SOLUTION: A lighting control device 1 performs dimming-control of a plurality of lighting devices 2 each of which illuminates an interior space 40 of an individual refrigerator 4, and a space lighting device 3 which illuminates a space including a plurality of refrigerating devices 4. An information acquisition unit 11 acquires a value of an initial power received. An integrated value of the initial power received per unit time is to be the integral power consumption. A prediction unit 12 predicts whether the integral power consumption for every unit time excesses a predetermined demand reference value by using the value acquired at the information acquisition unit 11. When the prediction unit 12 predicts that the integral power consumption excesses the demand reference value, a control unit 14 carries out dimming of the interior lighting device 2 and the space lighting device 3 so that the integral power consumption becomes less than the demand reference value. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an illumination control device, an illumination system, and an illumination control method that perform dimming control on an interior illumination device that illuminates the interior of a refrigerator and a space illumination device that illuminates a space including the refrigeration device.

  In general, in stores such as supermarkets and department stores that handle foods, three types of equipment such as lighting equipment, air conditioning equipment, and refrigeration equipment are the main power consuming equipment. In particular, since the power consumption of the refrigeration apparatus is large, the increase or decrease in the power consumption of the refrigeration apparatus greatly affects the increase or decrease in the power consumption in the entire store.

  Defrost (defrosting) is a factor that increases or decreases the power consumption of the refrigeration apparatus. Defrosting is performed, for example, by energizing a heater provided in the evaporator. The number of times the heater is energized per day is about 2 to 6 times for each refrigeration apparatus. Since the operation of the refrigerator is stopped during the defrost period, the power consumption in the refrigerator becomes zero. However, when the heater is energized, the heater consumes power. When the defrost is completed, the energization of the heater is stopped. However, the power consumption in the refrigerator is temporarily increased after the defrost is completed in order to cool the inside of the chamber whose temperature has been increased by the defrost to the set temperature.

  On the other hand, the electric power company determines the basic charge for business power based on the maximum value of the integrated value of received power per unit time (hereinafter referred to as “demand peak”). For this reason, if the peak value (peak power) of the power consumption of the refrigeration apparatus increases after the defrost is finished, the demand peak increases, and there is a possibility that the basic charge may increase due to this increase (FIG. 3 ( b)).

  In order to solve the above problem, it is necessary to perform demand control for reducing the peak demand by suppressing the peak power of the refrigeration apparatus. For this reason, conventionally, a technique for lowering the ambient temperature of the refrigeration apparatus at the start of defrost has been proposed (see, for example, Patent Document 1). According to this technology, by reducing the ambient temperature of the refrigeration apparatus as described above, the peak power of the refrigeration apparatus after completion of defrosting can be suppressed and the demand peak can be lowered.

JP 2007-24443

  However, in the conventional technique described in Patent Document 1, the ambient temperature of the refrigeration apparatus is lowered regardless of the outside air temperature, which may cause discomfort to the purchaser.

  In order to lower the demand peak without lowering the ambient temperature of the refrigeration apparatus, a technique for reducing the light level of the interior lighting device that illuminates the interior of the refrigeration apparatus during the defrost period is conceivable. According to this technology, the power consumption of the interior lighting device itself can be reduced by dimming the interior lighting device during the defrost period, and the amount of heat generated in the interior due to the illumination of the interior lighting device can be reduced. Since it can be lowered, the peak power of the refrigeration apparatus after the defrosting can be suppressed, and as a result, the demand peak can be lowered.

  However, in the conventional technique for dimming the interior lighting device, the interior becomes darker than before during the defrost period, that is, the ratio of the interior illumination to the surroundings (space) (= interior illumination) / Space illuminance) is smaller than before, which may reduce the attractiveness of the displayed products in the warehouse and may reduce the willingness to purchase.

  The present invention has been made in view of the above points, and an object of the present invention is to prevent the ratio of the illuminance in the refrigerator of the refrigeration apparatus to the space from becoming small, without reducing the attractiveness of the displayed goods in the refrigerator. An object of the present invention is to provide a lighting control device, a lighting system, and a lighting control method capable of preventing an increase in demand peak after completion of defrosting of the refrigeration apparatus in a state in which the purchase will not be reduced.

  The invention of the lighting control device according to claim 1 includes: an interior lighting device that illuminates the interior of the refrigeration apparatus having a refrigerator that cools the interior that is visible from the outside; and a spatial illumination that illuminates a space including the refrigeration apparatus. A lighting control device that performs dimming control of the device, an information acquisition unit that acquires a value of received power including power consumption of the interior lighting device, the space lighting device, and the refrigeration device, and a unit time Using the integrated value of received power as the integrated power amount, the value acquired by the information acquisition unit is used to predict whether the integrated power amount per unit time exceeds a preset demand reference value. When the prediction unit and the prediction unit predict that the integrated power amount exceeds the demand reference value, the internal lighting device and the spatial lighting device are configured so that the integrated power amount is equal to or less than the demand reference value. Dimming control Characterized in that it comprises and.

  According to a second aspect of the present invention, there is provided the lighting control device according to the first aspect, wherein the control unit predicts the spatial lighting device when the prediction unit predicts that the integrated power amount exceeds the demand reference value. The internal lighting device is dimmed after the light is dimmed, and the prediction unit predicts that the integrated power amount is less than the demand reference value after the internal lighting device and the space lighting device are dimmed In this case, the internal lighting device is returned to the original light output before the spatial lighting device is returned to the original light output.

  According to a third aspect of the present invention, there is provided a lighting control device according to the first or second aspect, further comprising: a determination unit that determines whether or not the refrigeration apparatus has returned to a state before the start of defrosting, and the information acquisition unit includes: The value of the power consumption of the refrigeration apparatus is acquired, and the determination unit, when the time fluctuation of the power consumption of the refrigeration apparatus is equal to or less than a preset first threshold after the refrigeration apparatus performs defrosting, When it is determined that the refrigeration apparatus has returned to the state before the start, and the control unit determines that the refrigeration apparatus has returned to the state before the start, the interior lighting device and The space illumination device is returned to the original light output.

  The invention of a lighting control device according to a fourth aspect is the invention according to any one of the first to third aspects, wherein the information acquisition unit acquires a power consumption value of the refrigeration device, and the control unit When the power consumption of the refrigeration apparatus exceeds a second reference value preset to a value lower than the demand reference value, the interior lighting device and the space lighting device are further dimmed.

  The invention of a lighting control device according to a fifth aspect is the invention according to any one of the first to fourth aspects, wherein a plurality of the refrigeration devices are arranged in the space, and power consumption is preliminarily determined from the plurality of refrigeration devices. A specific unit that identifies a refrigeration apparatus that exceeds a set third reference value is provided, and a plurality of the interior lighting devices are provided corresponding to each refrigeration apparatus, and the control unit is identified by the specific unit When the refrigeration apparatus starts defrosting, all of the plurality of interior lighting apparatuses are dimmed.

  The invention of a lighting control device according to a sixth aspect is the invention according to any one of the first to fourth aspects, wherein a plurality of the refrigeration devices are arranged in the space, and at least one of the plurality of refrigeration devices is external light. A plurality of the interior lighting devices are provided corresponding to each refrigeration device, and the information acquisition unit acquires a power consumption value of the refrigeration device installed at the incident position of the external light. When the power consumption of the refrigeration apparatus installed at the external light incident position exceeds a preset second threshold, the control unit corresponds to the refrigeration apparatus installed at the external light incident position. The interior illumination device and the space illumination device corresponding to another refrigeration device are dimmed while keeping the light output of the interior illumination device constant.

  Invention of the lighting system which concerns on Claim 7 is the space which illuminates the space containing the lighting control apparatus of any one of Claims 1-6, the interior lighting apparatus which illuminates the inside of the said freezing apparatus, and the said freezing apparatus And an illumination device.

  The invention of the lighting control method according to claim 8 includes: an interior lighting device that illuminates the interior of the refrigeration apparatus having a refrigerator that cools the interior that is visible from the outside; and a spatial illumination that illuminates a space including the refrigeration apparatus. A lighting control method for dimming and controlling a device, wherein a first step of obtaining a value of received power including power consumption of the interior lighting device, the space lighting device, and the refrigeration device, and unit time Using the value obtained in the first step as a cumulative value of the received power of the power, the value obtained in the first step is used to predict whether the cumulative power amount per unit time exceeds a preset demand reference value And when the integrated power amount is predicted to exceed the demand reference value, the internal lighting device and the space lighting device are dimmed so that the integrated power amount is equal to or less than the demand reference value. Third Characterized by a step.

  According to the first, seventh, and eighth aspects of the present invention, when the integrated power amount is predicted to exceed the demand reference value, the interior lighting device is dimmed in order to reduce the heat generated in the interior of the refrigerator. By dimming the space lighting device, the ratio of the illuminance in the cabinet to the space can be kept smaller compared to dimming only the lighting device in the cabinet, thus reducing the appearance of the displayed products in the cabinet. The peak power after defrosting of the refrigeration system can be reduced without causing the purchaser's willingness to purchase to be reduced, and as a result, the integrated power consumption can be reduced below the demand reference value. , The rise of demand peak can be prevented.

  According to the second aspect of the present invention, the interior illumination device is dimmed after the space illumination device is dimmed, and the interior illumination device is returned to the original light output before returning the space illumination device to the original light output. By returning, temporary darkening can be avoided in the refrigerator.

  According to the invention of claim 3, it is possible to recognize that the rebound period after the end of defrosting in the refrigeration apparatus has ended because the time fluctuation of the power consumption of the refrigeration apparatus is equal to or less than the first threshold, and the interior lighting Since the dimming time of the device and the space lighting device can be shortened, the influence on the purchase of goods by the purchaser can be suppressed.

  According to the invention of claim 4, the characteristics of the refrigeration apparatus can be obtained by changing the light reduction amount of the interior illuminating apparatus and the space illuminating apparatus in accordance with the magnitude of the peak power of the refrigeration apparatus during the rebound period after the defrosting. Since dimming can be performed according to the above, unnecessary dimming can be suppressed.

  According to the invention of claim 5, the integrated power amount can be further relaxed by dimming all the interior lighting devices at the timing when the refrigeration apparatus having a large peak power in the past starts defrosting.

  According to the invention of claim 6, by suppressing the dimming of the interior lighting device corresponding to the refrigeration apparatus installed at the incident position of the external light, the ambient illuminance is higher than other refrigeration apparatuses by daylighting, Since the ratio of the illuminance in the refrigerator with respect to the space can be made constant, the buyer's willingness to purchase is not reduced.

1 is a block diagram illustrating a configuration of a first embodiment. It is a layout view of the refrigeration apparatus, the interior lighting apparatus, and the space illumination apparatus according to the above. (A) is a figure which shows the power consumption characteristic of the freezing apparatus which concerns on the same as the above, (b) is a figure which shows the power consumption characteristic of the conventional freezing apparatus. It is a figure which shows the integrated value of received electric power in the same as the above. It is a figure which shows the power consumption characteristic of an interior lighting device, a space lighting device, and a freezing apparatus in the same as the above. It is a flowchart of the illumination control method using the illumination control apparatus which concerns on the same as the above. (A) is a figure which shows the change of the optical output of the interior lighting apparatus and space lighting apparatus which concerns on the same as the above, (b) is a figure which shows the change of the light output of the conventional interior lighting apparatus and space lighting apparatus. It is a block diagram which shows the structure of the illumination control apparatus which concerns on Embodiment 2. FIG. About the refrigeration apparatus which concerns on the same as the above, (a) is a figure which shows the power consumption characteristic when peak power is large, (b) is a figure which shows the power consumption characteristic when peak power is small. It is a flowchart of the illumination control method using the illumination control apparatus which concerns on the same as the above.

(Embodiment 1)
As shown in FIG. 1, the lighting control device 1 according to the first embodiment performs dimming control on a plurality of in-compartment lighting devices 2,... And the space lighting device 3. Each interior lighting device 2 corresponds to a different refrigeration apparatus 4 and is installed in the refrigeration apparatus 4 so as to illuminate the interior 40 of the corresponding refrigeration apparatus 4. The illumination control device 1, the interior illumination device 2, and the space illumination device 3 constitute an illumination system. Each interior lighting device 2, space lighting device 3, and each refrigeration device 4 are arranged in a space S as shown in FIG. The space illumination device 3 illuminates the entire indoor space (for example, a store) where each refrigeration device 4 is installed. That is, the space illumination device 3 illuminates the space S including each refrigeration device 4. The refrigeration apparatus 4a shown in FIG. 2 is installed in an external light incident position (in the vicinity of the window W) in the space S.

  As shown in FIG. 1, the interior lighting device 2 includes a light source 20, a lighting device 21 that turns on the light source 20, and a communication unit 22 that receives an instruction to the lighting device 21 from the lighting control device 1 via the transmission path 6. And.

  The spatial lighting device 3 includes a light source 30, a lighting device 31 that turns on the light source 30, and a communication unit 32 that receives an instruction for the lighting device 31 from the lighting control device 1 via the transmission path 6.

  Each refrigeration apparatus 4 includes a refrigerator 41 that cools the inside 40 of an open type showcase that is visible from the outside, a heater 42 that defrosts an evaporator (not shown), and the refrigerator 41 and the heater 42. A control unit 43 that controls the energization of the refrigerator, a first power measurement unit 44 that measures the power consumption of the refrigerator 41, a second power measurement unit 45 that measures the power consumption of the heater 42, and the transmission path 6. A communication unit 46 that receives an instruction to the control unit 43 from the lighting control device 1 and transmits measurement results of the first and second power measurement units 44 and 45 to the lighting control device 1.

  In each refrigeration apparatus 4, when the average value of the power consumption of the refrigerator 41 and the heater 42 every 30 minutes is obtained, it is as shown in FIG. Considering the transition of the power consumption of the refrigeration apparatus 4 shown in FIG. 3, the base power Pb during the stable state (hereinafter referred to as “base period Tb”) and the refrigerator 41 are stopped but the heater 42 is energized. The defrost power Pd during the defrosting period (hereinafter referred to as “defrost period Td”) and the period during which the power consumption temporarily increases when the operation of the refrigerator 41 is resumed after the defrost is completed (hereinafter referred to as “rebound period”). It is possible to classify it into rebound power Pr of “Tr”. The rebound power Pr is generated by temporarily increasing the power consumption in the refrigerator 41 in order to lower the temperature that has risen due to energization of the heater 42 during defrosting to the set temperature. The rebound period Tr may continue for 30 to 60 minutes in summer. Each refrigeration apparatus 4 performs defrost so that the peaks of the rebound power Pr do not overlap with other refrigeration apparatuses 4 (see FIG. 5). That is, the defrost start timing is set to be different between the refrigeration apparatuses 4.

  The distribution board 5 shown in FIG. 1 communicates with the lighting control device 1 via the power supply unit 50 that supplies power to the interior lighting devices 2, the space lighting devices 3, and the refrigeration devices 4, and the transmission path 6. And a communication unit 51. In FIG. 1, the flow of electric power from the distribution board 5 is indicated by a bold line.

  Next, the lighting control device 1 of the present embodiment will be described. The illumination control device 1 of the present embodiment includes a communication unit 10, an information acquisition unit 11, a prediction unit 12, an illuminance sensor 13, and a control unit (demand control unit) 14. The information acquisition unit 11, the prediction unit 12, and the control unit 14 are configured by, for example, a processing device (not shown) of a computer system (general-purpose computer, embedded system). A program for causing the processing device to realize the functions of the information acquisition unit 11, the prediction unit 12, and the control unit 14 is stored in, for example, a main storage device (not shown) of the computer system.

  The communication unit 10 communicates with each interior lighting device 2, the space lighting device 3, each refrigeration device 4, and the distribution board 5 via the transmission path 6.

  The information acquisition unit 11 acquires the value of the received power from the distribution board 5 via the communication unit 10 every predetermined time (less than 30 minutes). The received power includes the power consumption of each interior lighting device 2, space lighting device 3, and each refrigeration device 4. Further, the information acquisition unit 11 acquires the power consumption value of each refrigeration apparatus 4 (including the refrigeration apparatus 4 a near the window) from each refrigeration apparatus 4 via the communication unit 10.

  As shown in FIG. 4, the prediction unit 12 uses the received power value acquired by the information acquisition unit 11 to calculate the integrated value of the received power in unit time (30 minutes) in unit time (30 minutes). Ask. The integrated value of the received power for 30 minutes is defined as the integrated power amount. The predicting unit 12 predicts that the integrated power amount exceeds the demand reference value when the integrated power amount exceeds the warning level L. On the other hand, when the integrated power amount is equal to or lower than the warning level L, the prediction unit 12 predicts that the integrated power amount does not exceed the demand reference value. The demand reference value is set in advance by a contract with an electric power company. The alert level L is set in advance with reference to the power consumption pattern of each refrigeration apparatus 4 with respect to time, the demand reference value, and the like. In setting the warning level L, it is preferable to refer to the power consumption pattern when the outside air temperature at the installation location of each refrigeration apparatus 4 is set to the highest outside air temperature that is assumed. Since the higher the outside air temperature is, the higher the power consumption is. Therefore, by referring to the power consumption pattern at the maximum outside air temperature as described above, the integrated power consumption will not exceed the demand reference value at any outside air temperature. It can be made not to exceed.

  In addition, when the control unit 14 dims the interior lighting device 2 and the space illumination device 3 as described later, the prediction unit 12 performs integration after the interior illumination device 2 and the space illumination device 3 are dimmed. When the electric energy is below the warning level L, it is predicted that the integrated electric energy does not exceed the demand reference value.

  The illuminance sensor 13 is installed outdoors, for example, outside the window W (see FIG. 2), and is used to determine the lighting condition around the refrigeration apparatus 4a (see FIG. 2) in the vicinity of the window.

  When the prediction unit 12 predicts that the integrated power amount exceeds the demand reference value, the control unit 14 stores the warehouse corresponding to the refrigeration apparatus 4 that starts defrosting first so that the integrated power amount becomes equal to or less than the demand reference value. The inner lighting device 2 and the space lighting device 3 are dimmed. Each control signal for dimming the interior lighting device 2 and the space illumination device 3 is transmitted from the communication unit 10 to the interior illumination device 2 and the space illumination device 3, respectively.

  As described above, the control unit 14 dims the interior lighting device 2 and the space illumination device 3, thereby reducing the power consumption itself of the interior illumination device 2 and the space illumination device 3 to lower the integrated power amount. In addition, since the amount of heat generated by illumination of the interior lighting device 2 can be reduced, an increase in the temperature of the interior 40 due to illumination of the interior illumination device 2 can be suppressed. Thereby, since the rebound electric power Pr of each refrigeration apparatus 4 can be reduced, integrated electric energy can be lowered | hung.

  In the present embodiment, when the prediction unit 12 predicts that the integrated power amount exceeds the demand reference value, the control unit 14 dims the interior lighting device 2 after dimming the space lighting device 3. At this time, as shown in FIG. 5, the control unit 14 dims the spatial lighting device 3 at the same timing as the start of the first defrost, and then the interior lighting corresponding to the refrigeration device 4 that first started the defrost. The device 2 is dimmed.

  Further, the controller 14 does not dimm the interior lighting device 2 and the space lighting device 3 throughout the day, but returns them to the original light output after the defrosting of the refrigeration device 4 as shown in FIG. Thereby, the dimming time of the interior lighting device 2 and the space lighting device 3 can be shortened.

  In the present embodiment, when the prediction unit 12 predicts that the integrated power amount is equal to or less than the demand reference value after the interior lighting device 2 and the space lighting device 3 are dimmed, the control unit 14 uses the space lighting device 3 as a source. Before returning to the light output, the interior lighting device 2 is returned to the original light output.

  By the way, since the installation place of the refrigeration apparatus 4a in the vicinity of the window is often daylighted, if the interior lighting device 2 corresponding to the refrigeration apparatus 4a in the vicinity of the window is dimmed, the interior 40 of the refrigeration apparatus 4a in the vicinity of the window with respect to the space S is reduced. The illuminance ratio (= internal illuminance / space illuminance) becomes small, and the illuminance balance between the interior 40 and the space S cannot be maintained. For this reason, with respect to the interior lighting device 2 corresponding to the refrigeration apparatus 4a in the vicinity of the window, the control unit 14 performs dimming control different from that of the other interior lighting devices 2. When the power consumption of the refrigeration apparatus 4a near the window exceeds the second threshold, the control unit 14 keeps the light output of the interior lighting device 2 corresponding to the refrigeration apparatus 4a near the window constant, The interior lighting device 2 and the space lighting device 3 corresponding to 4 are dimmed. Thereby, in the refrigeration apparatus 4a in the vicinity of the window, the integrated electric energy can be reduced without reducing the ratio of the illuminance of the interior 40 to the space S.

  Moreover, the control part 14 will judge with the time of defrost start, if the value of the power consumption acquired by the information acquisition part 11 via the communication part 10 will be less than the preset threshold power about each refrigeration apparatus 4. FIG. When the prediction unit 12 predicts that the integrated power amount exceeds the demand reference value, if any of the refrigeration apparatuses 4 is determined to start defrosting by the control unit 14, a signal for dimming the spatial lighting device 3 is generated. It is transmitted from the communication unit 10 to the space illumination device 3. Thereby, the control part 14 can recognize the start timing of the defrost of each refrigeration apparatus 4, and can dimming the space illumination apparatus 3 at the start timing of a defrost.

  Moreover, the control part 14 will judge that the rebound period Tr has started about each refrigeration apparatus 4, if the value of power consumption becomes more than the said threshold power after the start of defrost. Thereby, the control unit 14 can recognize the defrost period Td of each refrigeration apparatus 4.

  Next, an illumination control method using the illumination control apparatus 1 according to the present embodiment will be described with reference to FIG. First, the information acquisition unit 11 acquires the value of received power from the distribution board 5 every predetermined time (for example, 5 minutes) (S1 in FIG. 6). Subsequently, the prediction unit 12 calculates the integrated power amount using the value of the received power (S2). On the other hand, the illuminance sensor 13 measures the illuminance of the space S (S3). Thereafter, the prediction unit 12 predicts whether or not the integrated power amount exceeds the demand reference value (S4). When the prediction unit 12 predicts that the integrated power amount exceeds the demand reference value, the control unit 14 determines whether or not it is after the start of the defrost of any of the refrigeration apparatuses 4 (S5), and the defrost is started. If so, the space illumination device 3 is dimmed (S6). After a predetermined time has elapsed since the spatial lighting device 3 dimmed, the control unit 14 dims the internal lighting device 2 corresponding to the refrigeration device 4 being defrosted (S7). As described above, when the prediction unit 12 predicts that the integrated power amount exceeds the demand reference value, the control unit 14 causes the interior lighting device 2 and the spatial illumination so that the integrated power amount becomes equal to or less than the demand reference value. The device 3 is dimmed. However, when the illuminance measured by the illuminance sensor 13 is high, that is, when lighting is large, the interior lighting device 2 corresponding to the refrigeration apparatus 4a in the vicinity of the window is not dimmed. In step S4, when the integrated power amount is less than or equal to the demand reference value, the interior lighting device 2 and the space lighting device 3 perform normal operation without being dimmed (S8). The illumination control apparatus 1 returns to step S1 after performing steps S7 and S8, respectively.

  With the above operation, the light outputs of the interior lighting device 2 and the space lighting device 3 change as shown in FIG. First, when the refrigeration apparatus 4 is in a normal period (a period that is neither the defrost period Td nor the rebound period Tr), the interior lighting device 2 and the space lighting device 3 perform a constant light output ((a1 in FIG. 7). )). Thereafter, the defrost period Td, the interior lighting device 2 and the space lighting device 3 are dimmed compared to the normal period (a2). Thereafter, after the rebound period Tr is reached or the rebound period Tr has elapsed, the interior lighting device 2 and the space lighting device 3 return to the same light output as that in the normal period (a3).

  As described above, according to the present embodiment, when the integrated power amount is predicted to exceed the demand reference value, the interior lighting device 2 is dimmed and the space is reduced in order to reduce the heat generation to the interior 40 of the refrigeration apparatus 4. Since the illumination device 3 is also dimmed, the ratio of the illuminance of the interior 40 to the space S can be prevented from becoming smaller than when only the interior illumination device 2 is dimmed. The peak power after the defrosting of the refrigeration apparatus 4 can be reduced in a state where the appearance of the product is not deteriorated and the purchase intention of the purchaser is not reduced. As a result, the integrated power amount is set to the demand reference value. The demand peak can be prevented from rising.

  Further, according to the present embodiment, the interior lighting device 2 is dimmed after the spatial lighting device 3 is dimmed, and the interior lighting device 2 is restored before the spatial lighting device 3 is returned to the original light output. By returning to the light output, temporary darkening in the interior 40 of the refrigeration apparatus 4 can be avoided.

  Furthermore, according to this embodiment, the window with respect to the space S is suppressed by suppressing the dimming of the interior lighting device 2 corresponding to the refrigeration device 4a in the vicinity of the window whose ambient illuminance is higher than that of the other refrigeration devices 4 by daylighting. Since the ratio of the illuminance in the cabinet 40 of the nearby refrigeration apparatus 4a can be made constant, the purchase willingness of the purchaser is not reduced.

(Embodiment 2)
As illustrated in FIG. 8, the illumination control device 1 according to the second embodiment includes a communication unit 10, an information acquisition unit 11, a prediction unit 12, an illuminance sensor 13, and a control unit 14. 1), a determination unit 15 that determines whether the refrigeration apparatus 4 has returned to the state before the start of defrosting, and the refrigeration apparatus 4 that satisfies the conditions described later from the plurality of refrigeration apparatuses 4. And a specifying unit 16 for specifying. In addition, about the component similar to Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The information acquisition unit 11 acquires the power consumption value of each refrigeration apparatus 4 as in the first embodiment. The determination unit 15 obtains a time fluctuation amount of the power consumption of the refrigeration apparatus 4 after the defrosting is finished, and when the time fluctuation amount becomes equal to or less than a preset first threshold, the refrigeration apparatus 4 returns to the state before the start. Judge.

  The specifying unit 16 specifies the refrigerating apparatus 4 in which the past rebound power Pr exceeds a preset third reference value from among the plurality of refrigerating apparatuses 4. The refrigeration apparatus 4 specified by the specifying unit 16 has a larger capacity than other refrigeration apparatuses 4. When the rebound power Pr is large, the demand peak is greatly affected.

  When the determination unit 15 determines that the refrigeration apparatus 4 has returned to the state before the start, the control unit 14 of the present embodiment returns the interior lighting device 2 and the spatial lighting device 3 to the original light output.

  Moreover, as shown in FIG. 9A, when the rebound power Pr of any one of the refrigeration apparatuses 4 exceeds the second reference value L, the controller 14 illuminates the interior lighting device 2 corresponding to the refrigeration apparatus 4. And the space illumination device 3 is further dimmed. The second reference value L is set in advance to a value lower than the demand reference value. The rebound power Pr is often different for each refrigeration apparatus 4. For this reason, the light reduction amount of the interior lighting device 2 and the space lighting device 3 is also different. In the lighting control device 1 according to the present embodiment, when the interior lighting device 2 and the space lighting device 3 are not uniformly uniformly dimmed from the beginning, they are relatively small dimming, and the initial dimming is insufficient. Since the amount of light reduction can be added to the interior illumination device 2 and the space illumination device 3, unnecessary light reduction can be suppressed. That is, in the lighting control apparatus 1 of the present embodiment, unnecessary dimming can be suppressed by adjusting the light reduction amount of the interior lighting device 2 and the space lighting device 3 according to the magnitude of the rebound power Pr. On the other hand, as shown in FIG. 9B, when the rebound power Pr of each refrigeration apparatus 4 is equal to or less than the second reference value L, the control unit 14 reduces the amount of light to the interior lighting device 2 and the space lighting device 3. Do not add.

  Further, when the refrigerating apparatus 4 specified by the specifying unit 16 starts defrosting, the control unit 14 dims all the interior lighting devices 2 corresponding to the respective refrigerating devices 4 together with the space lighting device 3. In the case of the refrigerating apparatus 4 having a large rebound power Pr, the effect of reducing the integrated power amount is small only with the interior lighting device 2 corresponding to the refrigerating apparatus 4. Therefore, in the lighting control apparatus 1 of the present embodiment, when the refrigeration apparatus 4 having a large rebound power Pr starts defrosting, not only the in-compartment lighting apparatus 2 corresponding to the refrigeration apparatus 4 but all the in-compartment lighting apparatuses. By dimming 2, the integrated power amount can be reduced.

  Next, an illumination control method using the illumination control apparatus 1 according to the present embodiment will be described with reference to FIG. First, the information acquisition part 11 acquires the value of received power from the distribution board 5 for every predetermined time (for example, 5 minutes) (S11 of FIG. 10). Subsequently, the prediction unit 12 calculates the integrated power amount using the value of the received power (S12). On the other hand, the illuminance sensor 13 measures the illuminance of the space S (S13). Thereafter, the prediction unit 12 predicts whether or not the integrated power amount exceeds the demand reference value (S14). When it is predicted that the integrated power amount exceeds the demand reference value, the information acquisition unit 11 acquires the power consumption of each refrigeration apparatus 4 (S15). Then, the determination part 15 calculates | requires the time fluctuation part (power time fluctuation | variation) of the power consumption of each freezing apparatus 4 (S16). Thereafter, the determination unit 15 determines whether or not the rebound period Tr of each refrigeration apparatus 4 has ended (S17). When it is defrost period Td or rebound period Tr (S18), specific part 16 specifies refrigerating device 4 in which past rebound electric power Pr exceeds the 3rd standard value (S19). When the refrigerating apparatus 4 having the rebound power Pr exceeding the third reference value is specified by the specifying unit 16, the control unit 14 dims all the interior lighting devices 2 and the space lighting devices 3 (S20). On the other hand, when the past rebound electric power Pr is less than or equal to the third reference value in all the refrigeration apparatuses 4, the control unit 14 dimmes only the corresponding interior lighting device 2 and spatial lighting device 3 (S21). After that, when the rebound power Pr of the refrigeration apparatus 4 exceeds the second reference value L (S22), the control unit 14 further dims the internal lighting apparatus 2 and the spatial lighting apparatus 3 that have been dimmed so far. (S23). Moreover, in step S14, when integrated electric energy is below a demand reference value, the interior lighting device 2 and the space lighting device 3 perform a normal driving | operation (S24). Even if neither the defrost period Td nor the rebound period Tr in step S18, the interior lighting device 2 and the space lighting device 3 perform normal operation (S25). The illumination control device 1 returns to step S11 after performing steps S22 to S25, respectively.

  As described above, according to the present embodiment, it is recognized that the rebound period Tr after the end of defrosting in each refrigeration apparatus 4 is ended by the time fluctuation of the power consumption of each refrigeration apparatus 4 being equal to or less than the first threshold value. In addition, since the dimming time of the interior lighting device 2 and the space lighting device 3 can be shortened, the influence of the purchaser on the purchase of goods can be suppressed.

  Moreover, according to this embodiment, according to the magnitude | size of the rebound electric power Pr of each refrigeration apparatus 4, the amount of light reduction of the interior lighting apparatus 2 and the space illumination apparatus 3 is changed, and it becomes the characteristic of each refrigeration apparatus 4. Since dimming can be performed together, unnecessary dimming can be suppressed.

  Furthermore, according to the present embodiment, the integrated power amount can be further relaxed by dimming all the interior lighting devices 2 at the timing when the refrigeration device 4 having a large past rebound power Pr starts defrosting. .

  As a modification of the first and second embodiments, in the lighting system, the lighting control device 1 stores the above information instead of only the lighting control device 1 recognizing information about the start and end of the defrost of each refrigeration device 4. By transmitting to the internal lighting device 2 and the spatial lighting device 3, the internal lighting device 2 and the spatial lighting device 3 may also recognize the information.

DESCRIPTION OF SYMBOLS 1 Illumination control apparatus 11 Information acquisition part 12 Prediction part 14 Control part 15 Judgment part 16 Identification part 2 In-chamber illumination apparatus 3 Spatial illumination apparatus 4 Refrigeration apparatus 4a Refrigeration apparatus near the window 40 In-compartment 41 Refrigerator S Space W Window

Claims (8)

It is an illumination control device that performs dimming control of an interior lighting device that illuminates the interior of the refrigeration apparatus having a refrigerator that cools the interior visible from the outside, and a space illumination device that illuminates the space including the refrigeration apparatus. And
An information acquisition unit for acquiring a value of received power including power consumption of the interior lighting device, the space lighting device, and the refrigeration device;
Whether or not the integrated power amount per unit time exceeds a preset demand reference value using the integrated power value of the received power per unit time as the integrated power amount and using the value acquired by the information acquisition unit A prediction unit for predicting
When the prediction unit predicts that the integrated power amount exceeds the demand reference value, control for dimming the interior lighting device and the space lighting device so that the integrated power amount is equal to or less than the demand reference value. An illumination control device comprising: The controller is
In the case where the prediction unit predicts that the integrated power amount exceeds the demand reference value, the interior lighting device is dimmed after dimming the space lighting device,
If the integrated power amount is predicted to be equal to or less than the demand reference value after the interior lighting device and the spatial lighting device are dimmed, before the spatial lighting device is returned to the original light output when predicted by the prediction unit The lighting control device according to claim 1, wherein the interior lighting device is returned to the original light output. A determination unit for determining whether or not the refrigeration apparatus has returned to the state before the start of defrosting;
The information acquisition unit acquires a power consumption value of the refrigeration apparatus,
When the time fluctuation of the power consumption of the refrigeration apparatus becomes equal to or less than a preset first threshold after the refrigeration apparatus performs defrosting, the determination unit returns the refrigeration apparatus to the state before the start. Judgment
The control unit returns the interior lighting device and the space lighting device to the original light output when the determination unit determines that the refrigeration device has returned to the state before the start. The lighting control device according to claim 1 or 2. The information acquisition unit acquires a power consumption value of the refrigeration apparatus,
When the power consumption of the refrigeration apparatus exceeds a second reference value preset to a value lower than the demand reference value, the control unit further dims the internal lighting device and the space lighting device The illumination control apparatus according to claim 1, wherein A plurality of the refrigeration devices are arranged in the space, and a specifying unit that specifies a refrigeration device whose power consumption exceeds a preset third reference value from the plurality of refrigeration devices,
A plurality of the interior lighting devices are provided corresponding to each refrigeration device,
5. The control unit according to claim 1, wherein when the refrigeration apparatus specified by the specifying unit starts defrosting, the control unit reduces all of the plurality of interior lighting devices. The lighting control device described. A plurality of the refrigeration devices are arranged in the space, and at least one of the plurality of refrigeration devices is installed at an incident position of external light,
A plurality of the interior lighting devices are provided corresponding to each refrigeration device,
The information acquisition unit acquires a power consumption value of a refrigeration apparatus installed at the incident position of the external light,
When the power consumption of the refrigeration apparatus installed at the incident position of the external light exceeds a preset second threshold, the control unit corresponds to the refrigeration apparatus installed at the incident position of the external light. 5. The internal lighting device and the space lighting device corresponding to another refrigeration device are dimmed while the light output of the internal lighting device is kept constant. 5. Lighting control device. The illumination control device according to any one of claims 1 to 6,
An interior lighting device that illuminates the interior of the refrigerator,
An illumination system comprising: a space illumination device that illuminates a space including the refrigeration device. A lighting control method for dimming control of an interior lighting device that illuminates the interior of a refrigeration apparatus having a refrigerator that cools the interior visible from the outside, and a spatial illumination apparatus that illuminates a space including the refrigeration apparatus. And
A first step of acquiring a value of received power including power consumption of the interior lighting device, the space lighting device, and the refrigeration device;
Whether or not the integrated power amount per unit time exceeds a preset demand reference value by using the integrated value of the received power per unit time as the integrated power amount and using the value acquired in the first step A second step of predicting
A third step of dimming the interior lighting device and the spatial lighting device so that the integrated power amount is less than the demand reference value when the integrated power amount is predicted to exceed the demand reference value; A lighting control method comprising:

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