JP6410284B1 - Showcase control system, method and program - Google Patents

Abstract

The digital smart real showcase control system (100) predicts an outside air temperature input unit (11) for inputting an outside air temperature, an outside air temperature table (12) for storing past outside air temperatures, and a predicted outside air temperature in the future. An outdoor temperature prediction unit (13), an indoor temperature input unit (14) for inputting room temperature, an indoor humidity input unit (15) for inputting room humidity, and an indoor enthalpy storage unit (16 for storing past room enthalpies) ), An indoor enthalpy prediction unit (17) for predicting the predicted indoor enthalpy of the future, and a showcase control unit (18) for controlling the temperature of the showcase based on the predicted outside air temperature and the predicted indoor enthalpy, The showcase can be controlled quickly and appropriately, and the showcase can be controlled with a minimum amount of energy.

Description

The present invention relates to a showcase control system, method, and program for controlling a showcase displaying a frozen product or a refrigerated product at a supermarket or a convenience store.

In stores such as supermarkets and convenience stores, showcases are used to display beverages and foods while refrigerated or frozen. Refrigerated showcases installed in supermarkets and other stores are equipped with refrigeration equipment, and cool air is blown into the showcase chamber displaying products from the outlet to cool the interior to a predetermined temperature. The air is sucked from the mouth, cooled again, and discharged as cold air into the cabinet.
The cooling temperature in the cabinet varies depending on the type of goods stored, and the chamber temperature is set for each showcase. The setting of the target temperature in the cabinet is performed by a freezer / refrigerated showcase controller installed for each showcase. If the target temperature is set, the internal temperature is detected, and the solenoid valve of the refrigeration apparatus is controlled to open and close so that the internal temperature approaches the target temperature.

  Patent Document 1 discloses an outside air temperature input unit for inputting outside air temperature information, and a current state with respect to the outside air temperature at the highest temperature during cooling based on the outside air temperature calculated from the outside air temperature information input by the outside air temperature input unit. An outside air temperature coefficient calculating means for calculating a ratio of the temperature difference between the current outside air temperature and the room temperature with respect to the temperature difference between the outside air temperature at the lowest temperature and a predetermined room temperature as the outside air temperature coefficient during cooling; The peak operating rate calculating means for calculating the average operating rate of the air conditioner at the highest temperature at the time and the average operating rate of the air conditioner at the lowest temperature at the time of heating as the peak operating rate, and the peak operating rate calculating means An average operating rate calculating unit that calculates an average operating rate at each hour by multiplying the calculated peak operating rate by the outside air temperature coefficient calculated by the outside air temperature coefficient calculating unit, and the average operating rate calculating unit The average surplus rate calculating means for calculating (1−average operating rate) as the average surplus rate with respect to the average surplus rate calculated in the above, and the maximum value for the average surplus rate calculated by the average surplus rate calculating means Control rate calculation means for calculating a control rate that is a predetermined value, air conditioning control means for energy-saving control of the air conditioner by the control rate calculated by the control rate calculation means, and case control rate for energy-saving control of the showcase There is described a showcase control system comprising a case control rate calculation means for calculating, and case control means for energy-saving control of the showcase by the control rate calculated by the case control rate calculation means.

Japanese Patent No. 4822303

  However, in such a conventional showcase control system, since the outside air temperature is detected and feedback control is performed to control the showcase based on the detected outside air temperature, the showcase control becomes the follow-up control. There is a problem that quick and appropriate control cannot be performed.

An object of the present invention is to provide a showcase control system, method, and program capable of controlling a showcase quickly and appropriately and controlling the showcase with a minimum amount of energy.

The showcase control system according to the present invention includes a showcase temperature input means for inputting temperature information in the showcase, an indoor temperature input means for inputting room temperature information, an indoor humidity input means for inputting room humidity information, Indoor enthalpy prediction means for predicting future predicted indoor enthalpy from room temperature input from room temperature input means and room humidity input from the room humidity input means, and show input by the showcase temperature input means Control means for controlling the temperature of the showcase based on the temperature in the case and the predicted indoor enthalpy predicted by the indoor enthalpy predicting means , the outside air temperature input means for inputting outside air temperature information, and the outside air temperature input means Outside temperature prediction that predicts future predicted outside temperature from input outside temperature information And a stage, the control means to control the temperature of the showcase based on the predicted outside air temperature predicted by the outside air temperature predicting unit.

  According to this configuration, the indoor enthalpy is predicted and the showcase is controlled based on the predicted indoor enthalpy. Therefore, by reflecting the estimated thermal load estimation result in the showcase control, a highly effective show Case energy saving control can be realized.

The outside air temperature input means for inputting the outside air temperature information, and the outside air temperature prediction means for predicting the predicted future outside air temperature from the outside air temperature information input by the outside air temperature input means, and the control means includes the outside air temperature information. By controlling the temperature of the showcase based on the predicted outside air temperature predicted by the temperature prediction means, the showcase is controlled based on the outside air temperature that is preempted rather than following the outside air temperature. In addition, the showcase can be controlled so that the showcase can be controlled with a minimum amount of energy.

  In addition, a storage unit that stores past outside air temperature is provided, and the outside temperature prediction unit predicts a predicted outside temperature based on data stored in the storage unit, thereby using the past data. The future can be predicted from the current outside air temperature with reference to how the temperature changes with respect to the current time.

  Further, the outside air temperature predicting means predicts the predicted outside air temperature in the future only for the time corresponding to the length of the refrigerant pipe connecting the showcase and the refrigerator, thereby leading the time corresponding to the length of the refrigerant pipe. The showcase can be controlled based on the predicted (future) outside air temperature, and the showcase can be quickly and appropriately controlled to control the showcase with a minimum amount of energy.

  Further, the control means controls the showcase based on a predicted bias outside air temperature obtained by adding a bias temperature for correcting a high temperature around the condenser to the predicted outside air temperature. By using the predicted bias outside air temperature around the condenser that is higher than the outside air temperature, it is possible to perform more appropriate showcase control in consideration of the high outside air temperature around the condenser.

The showcase control method according to the present invention includes a showcase temperature input step for inputting temperature information in the showcase, an indoor temperature input step for inputting room temperature information, and an indoor humidity input step for inputting room humidity information. The indoor enthalpy prediction step for predicting the future predicted indoor enthalpy from the room temperature input by the indoor temperature input step and the indoor humidity input by the indoor humidity input step, and the showcase temperature input step. A control step of controlling the temperature of the showcase based on the predicted indoor enthalpy predicted by the indoor enthalpy prediction step, an outdoor air temperature input step for inputting outdoor air temperature information, and the outdoor air temperature input Outside entered by step And a fresh air temperature prediction step of predicting a prediction outdoor temperature future from the temperature information, the control step includes a control means controls the temperature of the showcase based on the predicted outside air temperature predicted by the outdoor temperature prediction step To do.

The present invention also provides a computer, a showcase temperature input means for inputting temperature information in the showcase, an indoor temperature input means for inputting room temperature information, an indoor humidity input means for inputting room humidity information, and the room Indoor enthalpy prediction means for predicting a future predicted indoor enthalpy from room temperature input from the temperature input means and indoor humidity input from the indoor humidity input means, and showcase input by the showcase temperature input means Control means for controlling the temperature of the showcase based on the indoor temperature and the predicted indoor enthalpy predicted by the indoor enthalpy predicting means, an outdoor air temperature input means for inputting outdoor air temperature information, and input by the outdoor air temperature input means Outside temperature prediction means for predicting future predicted outside air temperature from the outside air temperature information For example, the control means is a program for functioning as a showcase control system for controlling the temperature of the showcase based on the predicted outside air temperature predicted by the outside air temperature predicting unit.

According to the present invention, the indoor enthalpy is predicted, and the showcase is controlled based on the predicted indoor enthalpy. Therefore, by reflecting the predicted thermal load estimation result in the showcase control, a highly effective show case saving control to showcase the control system, it is possible to realize a method and a program. The outside air temperature input means for inputting the outside air temperature information, and the outside air temperature prediction means for predicting the predicted future outside air temperature from the outside air temperature information input by the outside air temperature input means, and the control means includes the outside air temperature information. By controlling the temperature of the showcase based on the predicted outside air temperature predicted by the temperature prediction means, the showcase is controlled based on the outside air temperature that is preempted rather than following the outside air temperature. In addition, the showcase can be controlled so that the showcase can be controlled with a minimum amount of energy.

It is a block diagram which shows the structure of the showcase control system which concerns on embodiment of this invention. It is a lineblock diagram of a showcase of a showcase control system concerning an embodiment of the invention. It is a flowchart which shows the energy-saving control operation | movement of the showcase control system which concerns on embodiment of this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.
(Embodiment)
FIG. 1 is a block diagram showing a configuration of a showcase control system according to an embodiment of the present invention. This embodiment is an example applied to an air conditioning control system, and air conditioning control is not essential to the present invention.
[overall structure]
As shown in FIG. 1, the showcase control system 100 includes an outside air temperature input unit 11 (outside air temperature input unit), an outside air temperature table 12 (storage unit), an outside air temperature prediction unit 13 (outside air temperature prediction unit), and an indoor temperature input. Unit 14, indoor humidity input unit 15, indoor enthalpy table 16 (storage unit), indoor enthalpy prediction unit 17 (enthalpy prediction unit), showcase control unit 18 (control unit), air conditioning control unit 19 (control unit), and show A case temperature input unit (showcase temperature input means) 21 is provided.
The outside air thermometer 20, the indoor thermometer 30, the indoor hygrometer 40, the showcase 50, the air conditioner 60, and the temperature sensor 131 are described for explaining the showcase control system 100.
The indoor thermometer 30 is a temperature sensor that detects the temperature of indoor air. The indoor hygrometer 40 is a humidity sensor that detects the humidity of room air. The temperature sensor 131 is a temperature sensor that detects the temperature in the showcase.

<Outside air temperature prediction unit 13>
The outside air temperature input unit 11 inputs the current outside air temperature from the outside air thermometer 20.
The outside air temperature table 12 stores past outside air temperatures for prediction of outside air temperatures.
Here, “outside temperature” as used in this specification is the temperature outside the building, which is basically equal to the temperature announced by the Japan Meteorological Agency, but it is assumed that there will be local fluctuations or variations. .
The outside air temperature prediction unit 13 predicts the outside air temperature and passes the predicted outside air temperature to the showcase control unit 18 and the air conditioning control unit 19.
The outside air temperature prediction includes a past data use prediction method that predicts the outside air temperature using past data, and an outside data use prediction method that predicts the outside air temperature using data from an external engine.

<< Past data usage forecast method >>
The outside air temperature prediction unit 13 predicts how the temperature will change in the future (for example, how many minutes later) (whether it rises or falls). The outside air temperature table 12 stores the outside air temperature data for every 30 minutes in the past, for example, one year to see how the temperature has changed with respect to the past current time. The outside air temperature prediction unit 13 predicts the future from the current outside air temperature based on past data read from the outside air temperature table 12 with reference to how the temperature has changed with respect to the past current time. To do. The details will be described below.

For example, the outside air temperature prediction unit 13 stores the outside air temperature every 30 minutes in the past year in the outside air temperature table 12, and reads the stored outside air temperature as the outside air temperature predicted value to predict the outside air temperature.
In general, if the temperature for each time zone is simply aggregated and used, fluctuations for each date and time are large, and accuracy is insufficient when a future predicted value is obtained from weather data having a large fluctuation amount. Therefore, instead of using the actual temperature value for each time zone as it is, the outside air temperature prediction unit 13 predicts the outside air temperature by, for example, the following methods (1) to (4) and stores it in the outside air temperature table 12. .

(1) Acquire the actual temperature value (for example, 30 minutes) in the area.
(2) Acquire weather data in the relevant area.
(3) A reference curve representing a change in temperature for each time zone (for example, a curve representing a change from the lowest temperature to the highest temperature for each region) is created. Specifically, for each region, the outside air temperature for each time zone from 0:00 to 24:00 on each day of the year and the temperature change for each time zone are stored as a reference curve. Even if the outdoor temperature of the day differs from year to year, the temperature change for each time zone on that day can be obtained by statistically accumulating it as past data. It can be represented by a curve. The outside air temperature table 12 stores (accumulates) the actual temperature value and the reference curve in the corresponding area.

  (4) A predicted value of the outside air temperature for each time zone is calculated from the acquired outside air temperature and the temperature change for each time zone on the day indicated in the reference curve. That is, the acquired outside air temperature is predicted to change at the slope of the temperature change indicated by the reference curve in the next time zone (for example, 1 hour, but 5 minutes, 15 minutes, 30 minutes, etc. are calculated by linear interpolation). For example, it is assumed that an outside air temperature table 12 as shown in Table 1 below is obtained. Changes in the outside air temperature “31.0 ° C.” at time 10:00 and the outside air temperature “31.5 ° C.” at time 11:00 in Table 1 (specifically, the slope of the temperature change indicated by the reference curve (curve)) Is assumed to be substantially constant for each time zone of each season, for example, after one hour, this temperature change “0.5” is added to the acquired outside temperature, and one hour ahead The predicted value of. If it is 15 minutes ahead, “0.5 / 4” is added to obtain the predicted value 15 minutes ahead.

  The outside air temperature prediction unit 13 uses the current outside air temperature and past data stored in the outside air temperature table 12 (here, past actual values and reference curves for each time zone) (for example, one hour later). ) Predict the outside air temperature. Further, in the above case, the outside air temperature after 30 minutes is obtained by adding (subtracting) 1/2 of the temperature change indicated by the reference curve to the current outside air temperature, thereby obtaining the predicted value of the outside air temperature after 30 minutes. Can be sought. The predicted value of the outside air temperature can be obtained by the same method even after 15 minutes or for two hours or more.

  As described above, the outside air temperature prediction unit 13 creates a reference curve representing a change in the temperature of the day based on the past actual temperature value, and predicts the temperature based on the reference curve. The outside air temperature prediction unit 13 does not use the average value or median value of the past actual values of the air temperature as the current air temperature, but based on the change in the temperature stored in the outside air temperature table 12, Since the temperature corresponding to the tendency of change is predicted, the prediction accuracy can be improved.

<External data usage prediction method>
As described in the above “Past data use prediction method”, the use of past data for prediction is an example, and the present invention is not limited thereto. For example, the outside air temperature prediction unit 13 can adopt the following << external data use prediction method >>.
The outside air temperature prediction unit 13 predicts the outside air temperature using, for example, a temperature forecast for the date announced by the Japan Meteorological Agency. The outside air temperature prediction unit 13 predicts a future outside air temperature with respect to the current outside air temperature with reference to a change in the temperature forecast announced by the Japan Meteorological Agency (time differentiation, that is, a tendency of temperature change). For example, the outside air temperature prediction unit 13 can receive data (meteorological data) including a forecast value announced by the Japan Meteorological Agency or Meteorological Company by accessing a computer of the Meteorological Agency or Meteorological Company.

<Indoor enthalpy prediction unit 17>
The indoor enthalpy table 16 stores past indoor enthalpies for predicting indoor enthalpy (see Table 1).
The indoor enthalpy prediction unit 17 refers to the indoor enthalpy table 16 and predicts indoor enthalpy. Specifically, the indoor enthalpy prediction unit 17 is based on the input temperature and humidity of the indoor air and the table value of the indoor enthalpy table 16, and is the enthalpy (also referred to as specific enthalpy) that is the total amount of humid air in the indoor air. Predict. The enthalpy in this embodiment indicates the enthalpy of 1 kg of substance (air), and the unit of enthalpy is (kJ / kgD.A.).

<Showcase control unit 18>
The showcase control unit 18 controls the temperature at which the display items in the showcase are frozen or refrigerated based on the temperature in the showcase input by the showcase temperature input unit 21. Specifically, it is a refrigerator or a refrigerator, for example, and it is desirable to perform energy saving control. For example, the control coefficient is calculated in advance based on the average sales floor temperature and specific enthalpy value (total heat of air) such as every month, business hours and non-business hours or day and night, Energy-saving control of refrigeration or refrigeration operation by the control factor.

  Further, the showcase control unit 18 predicts a future predicted outside air temperature for a time corresponding to the length of the refrigerant pipe 130 (see FIG. 2) from the input outside air temperature information, and the showcase is based on the predicted outside air temperature. The temperature of 50 is controlled (detailed later).

<Air conditioning control unit 19>
In this embodiment, the operating rate of the showcase control unit 18 that controls the temperature at which the display items in the showcase are frozen or refrigerated (hereinafter, this operating rate is referred to as “showcase operating rate”) is detected. When the case operating rate exceeds a predetermined value, the energy saving control of the air conditioner 60 is suppressed or stopped, the temperature of the sales floor where the showcase is installed is lowered, and the showcase operating rate is lowered to a predetermined value or less. It realizes energy saving as a whole. Note that the case where the sales floor rises to an unintended temperature is, for example, a system that cannot detect that the specific enthalpy value (total heat of air) is high without measuring the humidity of the sales floor. It is assumed that the control cannot be detected as being overloaded, or that the air conditioning control cannot follow the sudden increase in visitors.

  The air conditioning control unit 19 calculates a control coefficient for energy-saving control of the air conditioner 60, and performs energy-saving control of the air conditioner 60 without excess or deficiency by the control coefficient. The control may be one that stops (turns off) the air conditioner 60 in a predetermined pattern, or one that performs inverter control.

The outside air temperature prediction unit 13, the indoor enthalpy prediction unit 17, the showcase control unit 18, and the air conditioning control unit 19 are configured by an arithmetic control unit such as a personal computer. The arithmetic control unit is configured by a CPU (Central Processing Unit) or the like, and controls the entire apparatus and executes an air conditioning energy saving control program to function as a showcase control system.

  The outdoor temperature table 12 and the indoor enthalpy table 16 are stored in a storage unit (storage means) such as a nonvolatile memory or an external storage device.

FIG. 2 is a configuration diagram of the showcase of the showcase control system 100. The present embodiment is an example applied to a control system for a refrigerated showcase installed in a store.
As shown in FIG. 2, the showcase control system 100 includes a showcase 50, a refrigerator 120, a refrigerant pipe 130, and a showcase control unit 18.
The showcase control unit 18 controls the refrigerator 120 and the like of the showcase 50. The installation location of the showcase control unit 18 is not limited to this example. For example, the showcase control unit 18 may be installed in the machine room 110b at the bottom of the showcase body 50a, or may be installed on the back surface of the showcase body 50a or at a location separated from the showcase body 50a.

The showcase 50 is installed in a store such as a supermarket or a convenience store, and displays products to be cooled, such as beverages and foods.
The showcase 50 is provided with a showcase body 50a having a product storage space. A blowout port 111 for blowing cool air downward is formed in the upper part of the showcase body 50a, and the cold air descending along the air curtain is formed in the lower part. A suction port 112 for sucking in is formed. At the bottom of the showcase body 50a, as a machine room 110b, an electromagnetic valve 113 provided in the refrigerant pipe 130, an expansion valve 114 for changing the high-pressure liquid refrigerant into a low-pressure liquid, and a fan motor 115 for circulating cold air are provided. . A cooler (evaporator) 116 is provided on the back side of the showcase body 50a to evaporate the low-pressure liquid refrigerant that has become a low-pressure liquid by the expansion valve 114 while removing heat.
The product storage space of the showcase body 50a includes a shelf plate 117 that is a display shelf, a bottom plate 118, and an air curtain 119 that covers the product storage space. The inside of the showcase 50 is cooled to a temperature according to the products displayed on the shelf plate 117 and the bottom plate 118 (hereinafter referred to as a display shelf).

  The air outlet 111 is provided with a temperature sensor 131 that detects the temperature of the display shelf of the showcase 50 (hereinafter referred to as the temperature of the showcase 50). The air outlet 111 is a place where a temperature close to the temperature set as a target is detected, and the sensor temperature detected by the temperature sensor 131 is set as the temperature of the showcase 50. In addition, the attachment location and the number of attachments of the temperature sensor 131 are not limited to this example.

The refrigerator 120 is connected to the showcase body 50a via the refrigerant pipe 130. The refrigerator 120 includes a compressor 121, a condenser 122, and a condenser cooling fan 123. The compressor 121 compresses the low-pressure gas returned from the refrigerant pipe 130 into a high-temperature and high-pressure (for example, 70 ° C. to 80 ° C.) gas. The compressor 121 increases the pressure of the refrigerant so that the refrigerant can be easily changed into a liquid state by the condenser 122 and also creates a flow of the refrigerant. The condenser 122 takes the heat of the high-temperature and high-pressure gaseous refrigerant and uses it as a high-pressure liquid refrigerant (for example, 30 ° C. to 40 ° C.). The condenser cooling fan 123 blows outside air to the condenser 122 to cool the condenser 122.
The refrigerator 120 can cool the plurality of showcases 50 by connecting the refrigerant pipes 130 to the plurality of showcases 50.

The showcase control system 100 constitutes a refrigeration cycle in which a compressor 121, an electromagnetic valve 113, an expansion valve 114, a cooler 116, and a condenser 122 are connected in an annular shape and can be refrigerated or frozen. As the compressor 121, for example, a rotary type, scroll type, or reciprocating type compressor can be used.

Hereinafter, the operation of the showcase control system 100 configured as described above will be described.
[Energy-saving control operation based on outside air temperature prediction]
First, the energy saving control operation of the showcase control system 100 will be described.
FIG. 3 is a flowchart showing the energy saving control operation of the showcase control system 100.
First, in step S1, the outside temperature input unit 11 inputs outside temperature information from the outside temperature thermometer 20 installed outdoors.
In step S <b> 2, the outside temperature input unit 11 stores outside temperature information in the outside temperature table 12.

In step S <b> 3, the outside air temperature prediction unit 13 predicts a future outside air temperature from changes in the current outside air temperature and the past outside air temperature, and passes the predicted outside air temperature to the showcase control unit 18 and the air conditioning control unit 19.
When the above-described << past data use prediction method >> is employed, the outside air temperature prediction unit 13 stores, for example, the outside air temperature for the past year in the outside air temperature table 12, and reads the stored outside air temperature as the outside air temperature predicted value. To predict the outside air temperature. The prediction is made for the current outside temperature. The outside air temperature predicting unit 13 predicts how the temperature will change in the future (after how many minutes) based on the current outside air temperature (whether it rises or falls). Note that the outside air temperature prediction unit 13 may predict the outside air temperature using the above-described << external data use prediction method >>.

In step S4, the room temperature input unit 14 (see FIG. 1) inputs room temperature information from the measurement value of the room thermometer 30.
In step S5, the indoor humidity input unit 15 (see FIG. 1) inputs the indoor humidity information from the measurement value of the indoor hygrometer 40.
In step S <b> 6, the indoor enthalpy prediction unit 17 calculates enthalpy (total amount of humid air of indoor air) from the input indoor temperature and indoor humidity, and stores it in the indoor enthalpy table 16.

  In step S <b> 7, the indoor enthalpy prediction unit 17 predicts the future indoor enthalpy from the current indoor enthalpy and the change in the past indoor enthalpy stored in the indoor enthalpy table 16.

  In step S8, the showcase control unit 18 controls the showcase 50 based on the temperature of the showcase 50, the predicted outside air temperature, and the predicted indoor enthalpy. Since the showcase control unit 18 controls the showcase 50 based on the predicted outside air temperature and the predicted indoor enthalpy that are predicted values in the future, quick and appropriate showcase control can be performed. In addition, in this embodiment, since the showcase control part 18 uses also the prediction control (refer FIG. 5) for the length of the refrigerant | coolant piping 130 in addition to using predicted external temperature, more quickly, and Appropriate showcase control can be realized.

  In step S <b> 8, the air conditioning control unit 19 controls the air conditioner 60 based on the predicted outside air temperature and the predicted indoor enthalpy and ends the processing of this flow. Since the air conditioning control unit 19 controls the air conditioner 60 based on the predicted outside air temperature and the predicted indoor enthalpy that are predicted values in the future, it is possible to perform quick and appropriate air conditioning control.

As described above, the showcase control system 100 predicts the indoor enthalpy together with the outside air temperature, and controls the showcase 50 based on the predicted outside air temperature and the indoor enthalpy.

In the present embodiment, the showcase 50 is controlled based on the pre-opened outside air temperature rather than following the outside air temperature. Therefore, the showcase 50 is controlled promptly and appropriately so that the showcase 50 can be displayed with the minimum necessary energy. The case 50 can be controlled.
Furthermore, the indoor enthalpy is predicted together with the outside air temperature, and the showcase 50 is controlled based on the predicted outside air temperature and the indoor enthalpy, so that the estimated thermal load estimation result is reflected in the showcase control. High-efficiency energy-saving control can be realized.

[Application example]
Next, an application example of the energy saving control operation based on the outside air temperature prediction will be described.
Table 1 is a table showing an example of the outside air temperature, the enthalpy, each coefficient, and the control amount stored in the outside air temperature table 12 and the indoor enthalpy table 16 (storage means). Table 1 stores outdoor air temperature (° C), + bias (° C), outdoor air temperature coefficient, enthalpy coefficient (kJ / kgD.A.), Enthalpy coefficient, operating coefficient, control coefficient, and control minutes (minutes) by time. To do. For example, it is each coefficient by the outside air temperature according to time and indoor air wet heat quantity enthalpy kJ / kgD.A.
Table 1 is referred to by the prediction unit 17 when the outdoor temperature prediction unit 13 and the indoor enthalpy are predicted.
As the outside air temperature (° C.) in Table 1, the predicted outside temperature is used in the present embodiment (hereinafter, the predicted outside temperature is used for the outside temperature).
The + bias (° C.) in Table 1 is the outside air temperature + condenser bias temperature (for example, 3.0 in Table 1). This + bias is a bias when considering the high temperature around the condenser.
The outside air temperature coefficient in Table 1 is outside air temperature / reference outside air temperature (for example, 32.0 in Table 1).
The enthalpy (kJ / kgD.A.) In Table 1 is calculated from the room temperature and room humidity (see step S6 in FIG. 3).
The enthalpy coefficient in Table 1 is enthalpy / reference enthalpy (eg, 55.42 in Table 1).

The operating coefficient in Table 1 is the outside air temperature coefficient × enthalpy coefficient × reference operating coefficient (for example, 0.63 in Table 1).
The control coefficient in Table 1 is (1−operation coefficient) × safety coefficient (for example, 0.60 in Table 1).
The control amount (minute) in Table 1 is control coefficient × reference control amount (for example, 30 in Table 1). This control amount is a number indicating whether the operation of the refrigerator 120 is stopped, that is, the electromagnetic valve 113 is closed for how many minutes in the unit of 30 minutes. For example, “9” means to save energy by stopping operation for 9 minutes within 30 minutes. Save energy during closing and save energy during opening.

  The air-conditioning control unit 19 shown in FIG. 1 performs energy-saving control of the air conditioner 60 by a control coefficient amount (control amount). For example, if the control coefficient is 0.40, the operation of the air conditioner 60 is stopped by 40% in a predetermined pattern, or the air conditioner 60 is inverter-controlled by 60% of the rated power consumption.

  As described above, the present embodiment performs energy saving control on the air conditioner 60 in the sales floor where the showcase 50 is installed, and further controls the air conditioner 60 so that the showcase control is not over-operated. The burden of freezing or refrigeration of the case 50 is reduced, and in the end, it greatly contributes to the overall energy saving of the store including the showcase 50.

[Showcase Control Operation of Showcase Control Unit 18]
<Basic control>
The showcase control unit 18 is installed for each showcase 50, for example, and performs control of cooling to a target temperature according to the products displayed on the display shelf. Note that the showcase control unit 18 may control the plurality of showcases 50 in an integrated manner.
The showcase control unit 18 is configured by a CPU (Central Processing Unit) or the like, and executes a showcase control program to function as a showcase control system.
The showcase control unit 18 detects the temperature of the showcase 50 and controls the opening and closing of the electromagnetic valve 113 of the refrigerator 120 so that the detected temperature approaches the target temperature, thereby changing the temperature of the showcase 50 to a product (for example, freezing Control is performed to maintain the temperature within a certain range (target temperature between the lower limit temperature and the upper limit temperature) suitable for storage of food. Note that the cooling temperature in the showcase 50 varies depending on the type of goods stored, and the temperature is set for each showcase 50. For example, 7 ° C for fruits and vegetables, 5 ° C for daily products (general name for foods that require refrigeration and has a short shelf life), 0 ° C for fresh fish or meat, -18 ° C for frozen foods, ice If it is a cream, it is -26 degreeC.

Further, the showcase control unit 18 controls the operation of the showcase 50 by a temperature-dependent control coefficient that is a control coefficient corresponding to the displacement of the temperature of the showcase 50 from the target temperature. Specifically, for example, when the product is fruit and vegetables, the target temperature is 7 ° C., the allowable temperature range is ± 4 ° C., and the control coefficient is 0.35, the displacement temperature coefficient is expressed as (showcase temperature (° C.) − Target temperature (7 C)) / allowable temperature range (4 [deg.] C.), energy-saving control of the showcase 50 is performed by temperature dependent control coefficient = control coefficient (0.35)-(control coefficient (0.35) * displacement temperature coefficient) In other words, if the temperature-dependent control coefficient is 0.40, the air conditioner 60 is stopped for 40% in a predetermined pattern, or the air conditioner 60 is inverter-controlled with 60% of the rated power consumption. . For example,
If the temperature of the showcase 50 is 3 ° C., the displacement temperature coefficient is −1 = (3-7) / 4, the temperature dependent control coefficient is 0.70 = 0.35 + (0.35 × 1),
If the temperature of the showcase 50 is 4 ° C., the displacement temperature coefficient is −0.75 = (4-7) / 4, and the temperature dependent control coefficient is 0.61 = 0.35 + (0.35 × 0.75). ,
If the temperature of the showcase 50 is 5 ° C., the displacement temperature coefficient is −0.5 = (5-7) / 4, and the temperature dependent control coefficient is 0.53 = 0.35 + (0.35 × 0.5). ,
If the temperature of the showcase 50 is 6 ° C., the displacement temperature coefficient is −0.25 = (6-7) / 4, and the temperature dependent control coefficient is 0.44 = 0.35 + (0.35 × 0.25). ,
If the temperature of the showcase 50 is 7 ° C., the displacement temperature coefficient is 0 = (7−7) / 4, the temperature dependent control coefficient is 0.35 = 0.35− (0.35 × 0),
If the temperature of the showcase 50 is 8 ° C., the displacement temperature coefficient is 0.25 = (8−7) / 4, and the temperature dependent control coefficient is 0.26 = 0.35− (0.35 × 0.25). ,
If the temperature of the showcase 50 is 9 ° C., the displacement temperature coefficient is 0.5 = (9−7) / 4, and the temperature dependent control coefficient is 0.18 = 0.35− (0.35 × 0.5). ,
If the temperature of the showcase 50 is 10 ° C., the displacement temperature coefficient is 0.75 = (10−7) / 4, and the temperature dependent control coefficient is 0.09 = 0.35− (0.35 × 0.75). ,
If the temperature of the showcase 50 is 11 ° C., the displacement temperature coefficient is 1 = (11−7) / 4, and the temperature dependent control coefficient is 0 = 0.35− (0.35 × 1).
It becomes.

<< Predictive control for the length of the refrigerant pipe 130 >>
Next, the predictive control operation for the length of the refrigerant pipe 130 will be described.
The showcase control unit 18 controls the showcase 50 based on a predicted (outside) predicted outside air temperature for a time corresponding to the length of the refrigerant pipe 130. Specifically, it is as follows.
The refrigerant pipe 130 connecting the showcase 50 and the condenser 122 shown in FIG. 2 ranges from several meters to several tens of meters. For this reason, the control result by the showcase control unit 18 does not reach the showcase 50 immediately, and a deviation from the predicted outside air temperature corresponding to the length of the refrigerant pipe 30 occurs. Here, the length of the refrigerant pipe 130 is known for each showcase 50.

The showcase control unit 18 performs predictive control that eliminates a delay from the predicted outside air temperature corresponding to the length of the refrigerant pipe 130. Specifically, the showcase control unit 18 controls the showcase 50 based on the predicted (outside) predicted outside air temperature for a time corresponding to the length of the refrigerant pipe 130. That is, the showcase control unit 18 determines a prediction time interval (how many minutes are predicted). As a result, the control timing varies depending on the length of the refrigerant pipe 130.
Here, a plurality of showcases 50 may be controlled by one condenser 122. In this case, the showcase control unit 18 controls the showcase 50 based on the predicted outside air temperature for the time corresponding to the length of the average refrigerant pipe 130 of the plurality of showcases 50.

《Bias outside temperature control to add the predicted bias outside temperature to the predicted outside temperature》
The showcase control unit 18 executes bias outside air temperature control for adding the predicted bias outside air temperature to the predicted outside air temperature. The vicinity of the compressor 121 shown in FIG. 2 is hot, and is usually higher than the outside air temperature as announced by the Japan Meteorological Agency. The showcase control unit 18 controls the showcase 50 around the compressor 121 based on a predicted outside air temperature obtained by adding a predicted bias outside air temperature to a predicted outside air temperature.

  In this way, the showcase control unit 18 predicts the outside air temperature ahead (future) for a time (for example, 5 minutes, 30 minutes, etc.) according to the length of the refrigerant pipe 130, and predicts the predicted outside air temperature. The operation of the refrigerator 120 is stopped by a control amount (unit: minute) corresponding to the predicted outside air temperature to which the predicted bias temperature is added. The showcase control unit 18 repeats “predictive control for the length of the refrigerant pipe 130”, temperature addition by “bias outside air temperature control”, and operation stop of the refrigerator 120.

As described above, the showcase control system 100 is based on the outside air temperature table 12 that stores the past outside air temperature for the prediction of the outside air temperature, and the future based on the outside air temperature table 12 from the inputted outside air temperature information. An outside air temperature prediction unit 13 that predicts the predicted outside air temperature, and a showcase control unit 18 that controls the temperature of the showcase based on the predicted outside air temperature.

  In the conventional example, since the outside air temperature is detected and fed back, the follow-up control is performed, and quick and appropriate control cannot be performed. On the other hand, in the present embodiment, the showcase is controlled based on the outside air temperature that is preempted rather than following the outside air temperature, so that the showcase is controlled promptly and appropriately to minimize the necessary amount. The showcase can be controlled by energy.

  In addition, the showcase control unit 18 predicts a future predicted outside air temperature for a time corresponding to the length of the refrigerant pipe 130 from the input outside air temperature information, and controls the temperature of the showcase 50 based on the predicted outside air temperature. To do.

  As a result, the showcase can be controlled based on the predicted (future) outside air temperature ahead by the time corresponding to the length of the refrigerant pipe. The showcase can be controlled with limited energy.

Further, the showcase control system 100 calculates the enthalpy that is the total heat quantity of the humid air of the indoor air based on the input temperature and humidity of the indoor air, and stores the calculated enthalpy of the indoor air and the indoor enthalpy table 16. The indoor enthalpy prediction unit 17 that predicts the future indoor enthalpy based on the past indoor enthalpy, and the showcase control unit 18 that controls the temperature of the showcase based on the predicted indoor enthalpy.

  As a result, the indoor enthalpy is predicted and the showcase is controlled based on the predicted outside air temperature and the indoor enthalpy. Therefore, by reflecting the predicted thermal load estimation result in the showcase control, a highly effective energy saving Control can be realized.

  The predicted outside air temperature may be taken into consideration for the prediction of the indoor enthalpy. The room temperature is affected by the outside air temperature through the building. That is, when the outside air temperature changes, the indoor temperature changes under the influence of the change in the outside air temperature after a lapse of a predetermined time. Therefore, the prediction can be made more accurately by adding the predicted outside air temperature to the factor that predicts the indoor enthalpy.

  The above description is an illustration of a preferred embodiment of the present invention, and the scope of the present invention is not limited to this, and other modifications are possible without departing from the scope of the present invention described in the claims. Modification examples and application examples are included.

  In this embodiment, both the outside temperature prediction by the outside temperature prediction unit 13 and the showcase control based on the predicted outside temperature according to the length of the refrigerant pipe 130 by the showcase control unit 18 are used. Either of them may be used. Similarly, bias outside air temperature control by the showcase control unit 18 may be used alone or in combination with both or one of the above.

  Further, the above-described exemplary embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. . Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each exemplary embodiment.

  This embodiment is an example applied to an air conditioning control system, and air conditioning control is not essential to the present invention. Further, in the present embodiment, for convenience of explanation, each control means, that is, the air conditioning control unit 19 (control means) and the showcase control unit 18 (control means) have been described separately, but this is executed by one control unit. Things may be used. Similarly, each table may be stored in any medium as a storage unit.

  Further, the showcase may be a case having a refrigerator-freezer function. The showcase also includes a refrigerator and a freezer. In other words, the showcase is for convenience of explanation, and may be a storage warehouse for frozen and refrigerated goods that does not necessarily show the product to a person, and the same effect can be obtained.

In the above embodiment, the names of the showcase control system and the showcase control method are used. However, this is for convenience of explanation, the name of the device is a showcase control device, and the name of the method is a showcase control management method. Etc.

The showcase control process described above is also realized by a program for causing the showcase control process to function. This program is stored in a computer-readable recording medium. The recording medium on which the program is recorded may be the ROM itself of the showcase control system, or a program reading device such as a CD-ROM drive is provided as an external storage device, and the recording medium is inserted therein. It may be a readable CD-ROM or the like.

  The recording medium may be a magnetic tape, a cassette tape, a flexible disk, a hard disk, an MO / MD / DVD, or a semiconductor memory.

The disclosure of International Patent Application PCT / JP2017 / 026149 filed on July 19, 2017, including the description, claims and drawings, is incorporated herein by reference in its entirety.
All publications, patents and patent applications cited herein are hereby incorporated by reference in their entirety.

11 Outside temperature input section (outside temperature input means)
12 Outside air temperature table (storage means)
13 Outside temperature prediction unit (outside temperature prediction means)
14 Indoor temperature input section (Indoor temperature input means)
15 Indoor humidity input section (indoor humidity input means)
16 Indoor enthalpy table (memory means)
17 Indoor enthalpy prediction unit (indoor enthalpy prediction means)
18 Showcase control unit (control means)
19 Air-conditioning control unit (control means)
20 Outdoor thermometer 21 Showcase temperature input section (showcase temperature input means)
DESCRIPTION OF SYMBOLS 30 Indoor thermometer 40 Indoor hygrometer 50 Showcase 50a Showcase main body 60 Air conditioner 100 Showcase control system 110b Machine room 111 Outlet 112 Inlet 113 Electromagnetic valve 114 Expansion valve 115 Fan motor 116 Cooler 117 Shelf (display shelf) )
118 Bottom plate (display shelf)
119 Air curtain 120 Refrigerator 121 Compressor 122 Condenser 123 Condenser cooling fan 130 Refrigerant piping 131 Temperature sensor

Claims (6)

Showcase temperature input means for inputting temperature information in the showcase;
Room temperature input means for inputting room temperature information;
Indoor humidity input means for inputting indoor humidity information;
Room enthalpy prediction means for predicting a future predicted indoor enthalpy from room temperature input from the room temperature input means and room humidity input from the room humidity input means;
Control means for controlling the temperature of the showcase based on the temperature in the showcase input by the showcase temperature input means and the predicted indoor enthalpy predicted by the indoor enthalpy prediction means ;
Outside temperature input means for inputting outside temperature information;
An outside temperature predicting means for predicting a future predicted outside temperature from outside temperature information input by the outside temperature input means,
The showcase control system , wherein the control means controls the temperature of the showcase based on the predicted outside air temperature predicted by the outside air temperature prediction means . A storage means for storing past outside air temperature;
The showcase control system according to claim 1, wherein the outside air temperature predicting unit predicts a predicted outside air temperature based on data stored in the storage unit. The showcase control system according to claim 1 or 2, wherein the outside air temperature predicting means predicts a predicted outside air temperature in the future for a time corresponding to a length of a refrigerant pipe connecting the showcase and the refrigerator. . The control means, the predicted outside air temperature, the condenser of claim 1 showcase control, wherein the controlling the showcase on the basis of the predicted bias ambient temperature plus the bias temperature to correct the high temperature around system. A showcase temperature input step for inputting temperature information in the showcase;
An indoor temperature input step for inputting indoor temperature information;
Indoor humidity input step for inputting indoor humidity information;
A room enthalpy prediction step for predicting a future predicted indoor enthalpy from a room temperature input by the indoor temperature input step and a room humidity input by the indoor humidity input step;
A control step of controlling the temperature of the showcase based on the temperature in the showcase input by the showcase temperature input step and the predicted indoor enthalpy predicted by the indoor enthalpy prediction step ;
An outside air temperature input step for inputting outside air temperature information;
An outside air temperature prediction step for predicting a future predicted outside air temperature from outside air temperature information input in the outside air temperature input step,
The showcase control method characterized in that the control step controls the temperature of the showcase based on the predicted outside air temperature predicted by the outside air temperature prediction step . Computer
Showcase temperature input means for inputting temperature information in the showcase, room temperature input means for inputting room temperature information, room humidity input means for inputting room humidity information, and room temperature input from the room temperature input means And indoor enthalpy predicting means for predicting future predicted indoor enthalpy from indoor humidity input from the indoor humidity input means, showcase internal temperature input by the showcase temperature input means, and indoor enthalpy prediction Control means for controlling the temperature of the showcase based on the predicted indoor enthalpy predicted by the means , outside air temperature input means for inputting outside air temperature information, and future prediction from the outside air temperature information inputted by the outside air temperature input means Outside temperature prediction means for predicting outside temperature, and the control means includes the outside temperature. Program for functioning as a showcase control system for controlling the temperature of the showcase based on the predicted outside air temperature predicted by the prediction means.

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