JP2015137805A - Freezing/refrigerating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically control an operation of a cooling device so as to suppress quality deterioration of an object to be cooled without consuming wasteful power, in accordance with a state of the object to be cooled put in a box.SOLUTION: A temperature monitoring device 20 includes: a temperature sensor for measuring temperature of an object to be cooled at conveyance as the temperature of the object to be cooled; a storage unit for storing the temperature of the object S to be cooled which is measured by the temperature sensor at each predetermined time as temperature history data Th; and an information transmission unit for transmitting the temperature history data Th stored in the storage unit to a cooling control device 30. The cooling control device 30 includes: data acquisition means for acquiring the temperature history data Th from the temperature monitoring device 20; rapid cooling determination means for determining the necessity of a rapid cooling operation for the object S to be cooled based on the temperature history data Th acquired by the data acquisition means when the object S to be cooled is put in a box; and operation control means for controlling so that a cooling means 2 performs the rapid cooling operation when the rapid cooling determination means determines that the rapid cooling operation is necessary.

Description

  The present invention relates to a refrigeration system that performs automatic control according to an object to be cooled that is housed in a refrigerator / refrigerator.

  Conventionally, a refrigeration system having a function capable of managing and controlling a refrigeration / refrigerator collectively has been proposed (see, for example, Patent Document 1). Patent Document 1 discloses that each refrigerator is connected to a centralized management control device via a transmission line, and manages a plurality of refrigerators collectively, for example, performing energy saving operation according to the day of the week. .

  In addition, a system has been proposed in which information on an article entering the warehouse is read from an RFID tag so that the article can be easily recognized where the article is located (see, for example, Patent Document 2). In Patent Document 2, an RFID tag storing article information is attached to an article accommodated in a warehouse, and a communication antenna in the warehouse reads the article information from the RFID tag to centrally manage the article storage location. It is disclosed.

JP 2012-7756 A JP 2012-71928 A

  In the freezing and refrigeration system of Patent Literature 1, as shown in Patent Literature 2, if an RFID tag is attached to an article stored in a freezer and stored, the freezing / refrigeration room in which the goods are stored in a warehouse having a plurality of freezing / refrigeration rooms. Can be centrally managed. However, since the temperature of the object to be cooled is unknown, the quality of the object to be cooled may be deteriorated due to excessive cooling or insufficient cooling. For example, when a rapid cooling operation is performed at the time of warehousing, an excessive cooling operation may be performed in order to prevent quality deterioration due to insufficient cooling of the object to be cooled, resulting in excessive power consumption.

  The present invention has been made to solve the above-described problems, and suppresses the deterioration of the quality of the object to be cooled without consuming unnecessary power in accordance with the state of the object to be cooled. Thus, an object of the present invention is to provide a refrigeration system that can automatically control the operation of the cooling device.

  The freezing / refrigeration system according to the present invention includes a cooling device for cooling the inside of the freezer / refrigerator, a cooling control device for controlling the cooling device, and a temperature monitoring device for monitoring the temperature of the object to be cooled that is stored in the freezer / refrigerator. The temperature monitoring device includes a temperature sensor that measures the temperature of the object to be cooled at the time of transportation as the temperature of the object to be cooled, and a history of the temperature of the object to be cooled measured by the temperature sensor. As a storage unit, and an information transmission unit that transmits temperature history data stored in the storage unit to the cooling control device. The cooling control device acquires data for acquiring temperature history data from the temperature monitoring device. A rapid cooling determination means for determining whether or not a rapid cooling operation is required for the object to be cooled based on the temperature history data acquired by the data acquisition means when the object to be cooled is received, and a rapid cooling determination means If the rapid cooling is determined to be necessary had, in which the cooling device has a driving control means for controlling to perform the quenching operation.

  According to the refrigeration system according to the present invention, it is determined whether or not a rapid cooling operation is necessary based on the temperature data of the object to be cooled, and the rapid cooling operation is performed when it is determined that the rapid cooling operation is necessary. By controlling the cooling device as described above, the operation of the indoor unit and the outdoor unit can be automatically controlled according to the state of the object to be cooled, so that the object to be cooled can be used without consuming unnecessary power. It is possible to suppress degradation of quality.

It is the schematic which shows Embodiment 1 of the freezing / refrigeration system of this invention. It is a block diagram which shows an example of the temperature monitoring apparatus in the freezing / refrigeration system of FIG. It is a block diagram which shows an example of the cooling control apparatus in the freezing / refrigeration system of FIG. It is a schematic diagram which shows an example of the data structure of the database of FIG. It is a flowchart which shows the operation example of the freezing / refrigeration system of FIG. It is a block diagram which shows Embodiment 2 in the freezing / refrigeration system of this invention. It is a flowchart which shows the operation example of the freezing / refrigeration system of FIG. It is a block diagram which shows Embodiment 3 in the freezing / refrigeration system of this invention. It is a flowchart which shows the operation example of the freezing / refrigeration system of FIG. It is a block diagram which shows Embodiment 4 in the freezing / refrigeration system of this invention. It is a schematic diagram which shows an example of the score conversion table of FIG. It is a figure which shows the operation example of the freezing / refrigeration system of FIG.

Embodiment 1. FIG.
FIG. 1 is a schematic view showing a preferred embodiment of the freezing and refrigeration system of the present invention. 1 is installed in a freezer / refrigerator RW in which an object to be cooled S such as frozen food or fresh food is stored in a frozen / refrigerated state. Note that FIG. 1 illustrates the case where the number of rooms is one, but a warehouse having two or more rooms may be used. And the to-be-cooled object S is conveyed with conveyance materials 3, such as a pallet, a corrugated cardboard, a box, or a bag, and is stored in freezing / refrigerator RW.

  The refrigeration system 1 in FIG. 1 includes a cooling device 2, an information reading device 10, a temperature monitoring device 20, and a cooling control device 30. The cooling device 2 constitutes a refrigeration cycle circuit in which an outdoor unit and an indoor unit are connected by a refrigerant pipe, and cools a space in the refrigeration / refrigerator RW.

  The information reading device 10 reads the object information SD related to the object S to be cooled that is stored in the refrigeration / refrigerator RW, and is installed near the entrance of the refrigeration / refrigerator RW. The information reading device 10 includes a tag reader that reads information stored in an IC tag in a non-contact manner by wireless communication, for example, and each IC tag is attached to a package in which the object to be cooled S is stored. This IC tag is, for example, an RFID (Radio Frequency IDentification) tag, in which the object information SD (object ID number, article type, optimum storage temperature, etc.) relating to the article S to be cooled is stored. . And the information reading apparatus 10 reads the to-be-cooled object information SD from the IC tag in a non-contact manner when the to-be-cooled object S is loaded or unloaded. The information reading device 10 transmits the read object information SD to the cooling control device 30 by wire or wirelessly.

  FIG. 2 is a block diagram illustrating an example of the temperature monitoring device 20 of FIG. 1, and the temperature monitoring device 20 will be described with reference to FIGS. 1 and 2. The temperature monitoring device 20 monitors the temperature of the object to be cooled S received in the freezer / refrigerator RW. The temperature monitoring device 20 is provided in the transport material 3 that is transported integrally with the object to be cooled S, and includes a temperature sensor 21, a controller 22, a storage unit 23, a tag reading unit 24, and information transmission. The unit 25 is provided.

  The temperature sensor 21 measures the ambient temperature of the object S to be cooled. For example, when the conveyance material 3 is a pallet, the temperature sensor 21 is installed on a placement surface on which the object S to be cooled is placed. Measure the ambient temperature. In addition, although the case where the temperature sensor 21 measures the ambient temperature is illustrated, for example, the temperature sensor 21 is installed on the inner surface of the conveyance material 3 such as a cardboard containing the object S to be cooled, and measures the surface temperature of the object S to be cooled. It may be a thing.

  The controller 22 controls the operation of the temperature monitoring device 20, and in particular has a function of sequentially storing the temperature detected by the temperature sensor 21 in the storage unit 23. Specifically, the controller 22 stores temperature data every predetermined time (for example, every hour), and the storage unit 23 stores a history of temperature data for a predetermined period (for example, 4 hours). Update as follows. In addition, the period setting of 4 hours is due to the fact that food is generally not allowed to be placed in a dangerous temperature zone of 5 to 60 ° C. where bacteria propagate, for 4 hours or more. Furthermore, the controller 22 acquires temperature data as the latest temperature data, for example, at intervals of 10 minutes, and updates or stores the latest temperature data in the storage unit 23. Therefore, the latest temperature data and the past temperature data for a predetermined period are stored in the storage unit 23 as the temperature history data Th. Of the temperature history data Th, the temperature data for a predetermined period (4 hours) is used for confirming the state of the cooled object S before warehousing, and the latest temperature data is used for rapid cooling control after warehousing.

  The tag reading unit 24 reads the article identification ID in the object information SD to be cooled from the IC tag, and the read article identification ID is stored in the storage unit 23. The information transmission unit 25 transmits / receives data to / from the cooling control device 30, and associates the temperature history data Th stored in the storage unit 23 with the article identification ID in accordance with a request from the cooling control device 30. In this state, the data is transmitted to the cooling control device 30. At this time, the information transmission unit 25 transmits the temperature history data Th to the cooling control device 30 using the article identification ID as address information used for communication.

  If the temperature history data Th is stored in the storage unit 23 in a state associated with the object to be cooled S (article identification ID), it is not necessary to provide the tag reading unit 24. For example, shipment of the object to be cooled S Sometimes, the storage unit 23 may store the article identification ID of the object S to be cooled in the transport material 3. In addition, the information transmission unit 25 may perform data transmission using wireless communication, or may perform wired communication such as providing a connector for the conveyance material 3 and connecting the cable.

  FIG. 3 is a block diagram illustrating an example of the cooling control device 30 of FIG. 1, and the cooling control device 30 will be described with reference to FIGS. 1 and 3. The cooling control device 30 controls the operation of the cooling device 2 and has a function of determining whether or not to perform a rapid cooling operation based on the temperature history data Th transmitted from the temperature monitoring device 20 in particular. Yes. In addition, although the cooling control apparatus 30 has illustrated about the case where the cooling apparatus 2 installed in one freezing / refrigerator RW is illustrated, the several cooling apparatus 2 each installed in several freezing / refrigerator RW is concentrated. It may also be provided in a centralized management device that manages them. The cooling control device 30 includes a data acquisition unit 31, a database 32, a rapid cooling determination unit 33, and an operation control unit 34.

  The data acquisition unit 31 acquires the object information SD to be cooled read by the information reading device 10 and stores it in the database 32, and acquires the temperature history data Th from the temperature monitoring device 20 by wireless communication, for example, in a non-contact manner. The temperature history data Th is stored in the database 32. At this time, the data acquisition means 31 determines that the article identification ID of the article to be cooled SD and the address at the time of transmission of the temperature history data Th (= article identification ID) are the same as the article to be cooled SD and the temperature. The history data Th is stored in the database 32 in association with it.

  FIG. 4 is a schematic diagram showing an example of the data structure of the database 32 of FIG. In FIG. 4, the object information SD regarding the object to be cooled S includes an article identification ID, an article type, an optimum storage temperature Ts, a storage limit temperature Tt, and a weight. The article identification ID is used to identify the packaged object in which the object to be cooled S is stored. The types of articles indicate vegetables, frozen fish, ice cream and the like. The optimum storage temperature Ts indicates an optimum temperature when stored in the freezer / refrigerator RW, and has an upper limit temperature Tsul and a lower limit temperature Tsdl. The storage limit temperature Tt indicates the upper limit temperature (or the lower limit temperature of the limit temperature) that can be tolerated when storing the object S to be cooled. On the other hand, as described above, the temperature history data Th indicates temperature data for a predetermined period (4 hours) and the latest temperature data.

  The rapid cooling determination means 33 in FIG. 3 determines whether or not a rapid cooling operation for rapidly refrigeration is necessary based on the temperature history data Th of the object to be cooled S, and the operation control means 34 determines the rapid cooling. The cooling device 2 is controlled so that the rapid cooling operation (cooling) is performed according to the determination result of the means 33. Here, the operation control means 34 controls the cooling device 2 so that the internal temperature becomes a predetermined set temperature during normal operation, and the compressor of the cooling device 2 operates at high speed, for example, during rapid cooling operation. At the same time, the cooling device 2 is controlled so that a large amount of cool air is blown by the high-speed operation of the fan. Note that the operation control means 34 will be exemplified in the case where a preset temperature Tr and a rapid cooling period CP for performing the rapid cooling operation are preset.

  Here, the rapid cooling determination unit 33 calculates an average temperature T1 for a predetermined period (for example, 4 hours) from the temperature history data Th, and determines whether the average temperature T1 is higher than the storage limit temperature Tt. When the average temperature T1 is higher than the storage limit temperature Tt (T1> Tt), it is determined that there is a possibility that the quality of the object S to be cooled, such as food, may be significantly lowered. Then, the operation control means 34 displays the abnormality of the object S to be cooled on the display unit or outputs a sound from a speaker or the like.

  On the other hand, when the average temperature T1 is equal to or lower than the storage limit temperature Tt (T1 ≦ Tt), the rapid cooling determination means 33 further determines whether or not the average temperature T1 is higher than the upper limit temperature Tsul of the optimum storage temperature Ts. When the average temperature T1 is higher than the upper limit temperature Tsul of the optimum storage temperature Ts (T1> Tsul), the rapid cooling determination unit 33 determines that the rapid cooling operation is necessary, and the operation control unit 34 cools the cooling device so that the rapid cooling operation is performed. 2 is controlled.

  When the average temperature T1 is equal to or lower than the upper limit temperature Tsul of the optimum storage temperature Ts (T1 ≦ Tsul), the rapid cooling determination unit 33 further determines whether or not the set temperature Tr is higher than the upper limit temperature Tsul of the optimum storage temperature Ts. When the set temperature Tr is higher than the upper limit temperature Tsul of the optimum storage temperature Ts (Tr> Tsul), the rapid cooling determination unit 33 determines that the rapid cooling operation is necessary, and the operation control unit 34 performs the rapid cooling operation. The cooling device 2 is controlled. On the other hand, when the set temperature Tr is equal to or lower than the upper limit temperature Tsul of the optimum storage temperature Ts (Tr ≦ Tsul), the rapid cooling determination unit 33 determines that the rapid cooling operation is unnecessary, and the operation control unit 34 normally Continue driving. That is, when either one of the average temperature T1 and the set temperature Tr is higher than the upper limit temperature Tsul of the optimum storage temperature Ts, the rapid cooling operation is performed, and both the average temperature T1 and the set temperature Tr are the upper limit temperature Tsul of the optimum storage temperature. In the following cases, normal operation is continued. When a plurality of objects to be cooled S are received at different timings, the rapid cooling determination means 33 determines the rapid cooling operation in accordance with the object to be cooled S that has been recently received.

  FIG. 5 is a flowchart showing an operation example of the refrigeration system 1 of FIG. 1, and an operation example of the refrigeration system 1 will be described with reference to FIGS. First, the object to be cooled S is conveyed in a state of being accommodated in a conveying material such as a pallet, and temperature data is measured by the temperature sensor 21 at intervals of one hour until the goods are received and stored in the storage unit 23 as needed. (Step ST1). And the memory | storage part 23 memorize | stores the temperature data for every 1 hour of a predetermined period (for example, 4 hours) as the temperature history data Th.

  When the object to be cooled S enters the refrigeration / refrigerator RW (step ST2), the information reading device 10 reads the object information SD related to the object to be cooled S from the IC tag and transmits it to the cooling control device 30. Then, based on the object information SD to be cooled acquired from the information reading device 10, the temperature control data 30 is requested from the cooling control device 30 to the temperature monitoring device 20, and the temperature history data Th is acquired by the cooling control device 30. It is stored in a state associated with the object information SD to be cooled (step ST3). When the controller 22 requests the temperature history data Th from the cooling control device 30, it is determined that the object to be cooled S has been stored in the refrigeration / refrigerator RW, and the temperature sensor 21 covers the object at intervals of 10 minutes. Measurement of the temperature of the cooling object S is started. After that, the average temperature T1 for the past 4 hours is calculated by the rapid cooling determination means 33 of the cooling control device 30. Thereafter, it is determined whether or not the average temperature T1 is higher than the storage limit temperature Tt (step ST4). When the average temperature T1 is higher than the storage limit temperature Tt, the cooling control device 30 performs an abnormal display indicating the food quality deterioration (step ST5).

  On the other hand, when the average temperature T1 is equal to or lower than the storage limit temperature Tt, the average temperature T1 is compared with the upper limit temperature Tsul of the optimum storage temperature Ts, and the necessity of the rapid cooling operation is determined (step ST6). When the average temperature T1 is higher than the optimum storage temperature Ts, the rapid cooling operation is started (step ST8). When the average temperature T1 is equal to or lower than the upper limit temperature Tsul of the optimum storage temperature Ts, the set temperature Tr and the upper limit temperature Tsul of the optimum storage temperature Ts are compared to determine whether or not the rapid cooling operation is necessary (step ST7). When the set temperature Tr is higher than the optimum storage temperature Ts, the rapid cooling operation is started (step ST8). On the other hand, when the set temperature Tr is equal to or lower than the upper limit temperature Tsul of the optimum storage temperature Ts, the normal operation is continued without performing the rapid cooling operation (step ST9).

  In this way, by grasping the state of the object to be cooled S based on the temperature history data Th and determining whether or not the rapid cooling operation is necessary, the quality of the object to be cooled S may be deteriorated. For example, a rapid cooling operation is performed to recover the storage state of the object to be cooled S, and if the object to be cooled S maintains a desirable storage state, the normal operation can be continued and the power consumption by the rapid cooling operation can be suppressed. That is, for example, when a predetermined rapid cooling operation is always performed when the object to be cooled S is received, an excessive cooling operation may be performed in order to prevent quality deterioration due to insufficient cooling of the object to be cooled S. This results in excessive power consumption. Further, since the temperature of the object to be cooled is unknown, the quality of the object to be cooled S may be deteriorated due to excessive cooling or insufficient cooling.

  On the other hand, as shown in FIG. 1 to FIG. 5, by determining whether or not the rapid cooling operation is necessary based on the temperature history data Th of the object S to be cooled, it is possible to reliably prevent quality deterioration due to insufficient cooling of the object S to be cooled. In addition, power consumption can be suppressed without performing unnecessary rapid cooling operation. In particular, the state of the object to be cooled S can be grasped by taking into account the temperature data of the object to be cooled S prior to warehousing, not the temperature data of the object to be cooled S at the time of warehousing. It is possible to accurately determine the necessity of rapid cooling. Further, by determining whether or not the rapid cooling operation is performed based on the optimum storage temperature Ts suitable for storing the cooled object S as the cooled object information SD, Excessive cooling can be prevented.

Embodiment 2. FIG.
6 is a block diagram showing a second embodiment of the cooling control device in the refrigeration system of the present invention, FIG. 7 is a flowchart showing an operation example of the refrigeration system 1 of FIG. 6, and refer to FIG. 6 and FIG. The cooling control device 130 will be described. In the cooling control device 130 of FIGS. 6 and 7, parts having the same configuration as the cooling control device 30 of FIGS. 3 and 5 are denoted by the same reference numerals, and description thereof is omitted. 6 and 7 is different from the cooling control device 30 in FIGS. 3 and 5 in that a set temperature calculation means 131 for calculating the set temperature Tr10 during the rapid cooling operation based on the optimum storage temperature Ts is provided. This is the point.

  Specifically, the set temperature calculation means 131 in FIG. 6 sets the set temperature Tr10 during the rapid cooling operation from the optimum storage temperature Ts of the object S to be cooled. The operation control unit 34 controls the cooling device 2 during the rapid cooling operation based on the set temperature Tr10 calculated by the set temperature calculation unit 131. When only one object to be cooled S is received, the set temperature calculation means 131 calculates the upper limit temperature Tsul of the optimum storage temperature Ts as the set temperature Tr10. On the other hand, when a plurality of objects to be cooled S are received, the set temperature calculation means 131 obtains an overlapping temperature range where a plurality of optimum storage temperatures Ts overlap. Then, the set temperature calculation means 131 calculates the highest overlap upper limit temperature in the overlap temperature range as the set temperature Tr10. For example, when the three objects to be cooled S having the optimum storage temperatures Ts of −10 to −20 ° C., −5 to −15 ° C., and 0 to −15 ° C. are received, the set temperature calculation unit 131 sets all the optimum storage temperatures. Of the temperature range −10 to −15 ° C. where the temperature Ts overlaps, the highest upper limit temperature −10 ° C. is set as the set temperature Tr10.

  Then, as shown in FIG. 7, it is determined whether or not a rapid cooling operation is required by comparing the average temperature T1 with the upper limit temperature Tsul of the optimum storage temperature Ts (step ST6), and the average temperature T1 is one of the optimum storage temperatures Ts. When the temperature is higher than the upper limit temperature Tsul, it is determined that it is necessary to perform cooling at once, and the rapid cooling operation using the set temperature Tr10 calculated based on the optimum storage temperature Ts instead of the set temperature Tr is started (step ST11). When the average temperature T1 is equal to or lower than the upper limit temperature Tsul of the optimum storage temperature Ts, the set temperature Tr and the upper limit temperature Tsul of the optimum storage temperature Ts are compared to determine whether or not the rapid cooling operation is necessary (step ST7). When the set temperature Tr is higher than the optimum storage temperature Ts, in order to prevent quality degradation due to insufficient cooling, a rapid cooling operation is started with the set temperature Tr10 calculated based on the optimum storage temperature Ts instead of the set temperature Tr. (Step ST12).

  Thus, by performing the rapid cooling operation by calculating the set temperature Tr10 during the rapid cooling operation based on the optimum storage temperature Ts, the rapid cooling operation according to the optimal storage temperature Ts of the object to be cooled S can be performed. it can. In addition, although the setting temperature calculation means 131 has illustrated about the case where the duplication upper limit temperature of the optimal storage temperature Ts is calculated as setting temperature Tr10, the lowest minimum temperature (for example, -15 degreeC) is set among the overlapping temperature ranges. You may make it calculate as temperature Tr10.

Embodiment 3. FIG.
FIG. 8 is a block diagram showing a third embodiment of the cooling control device in the refrigeration system of the present invention, and FIG. 9 is a flowchart showing an operation example of the refrigeration system of FIG. 8, with reference to FIG. 8 and FIG. The control device 230 will be described. In the cooling control device 230 of FIGS. 8 and 9, the same reference numerals are given to portions having the same configuration as the cooling control device 30 of FIGS. 3 and 5, and description thereof is omitted. The cooling control device 230 of FIGS. 8 and 9 is different from the cooling control device 30 of FIGS. 3 and 5 in that rapid cooling period setting means 231 for setting a rapid cooling period when performing the rapid cooling operation is provided. is there.

  The rapid cooling period setting means 231 in FIG. 8 calculates the rapid cooling period based on the average temperature T1, the set temperature Tr, and the optimum storage temperature Ts, and in particular, the determination using the average temperature T1 and the optimum storage temperature Ts. The first quenching period CP1 during the rapid cooling operation based on the result and the second rapid cooling period CP2 during the rapid cooling operation based on the determination result using the set temperature Tr and the optimum storage temperature Ts are included. Here, the first quenching period CP1 is calculated using, for example, the following formula (1). When a plurality of objects to be cooled S are received at a time, the rapid cooling period setting means 231 calculates the first rapid cooling period CP1 for each object to be cooled S, and adopts the longest first rapid cooling period CP1. . On the other hand, the second quenching period CP2 is preset in the quenching period setting means 231 (for example, the second quenching period CP2 = 0 hours).

  As shown in FIG. 9, when the average temperature T1 is higher than the upper limit temperature Tsul of the optimum storage temperature Ts, the rapid cooling period setting means 231 calculates the first rapid cooling period CP1 by the above formula (1) (step ST21). . Thereafter, in the operation control means 34, a rapid cooling operation is performed during the first rapid cooling period CP1 at a predetermined set temperature Tr (step ST22). On the other hand, when the average temperature T1 is equal to or lower than the upper limit temperature Tsul of the optimum storage temperature Ts, the rapid cooling operation is not performed (second rapid cooling period CP2 = 0 hours) and the normal operation is continued. Although FIG. 9 illustrates the case where the set temperature Tr and the upper limit temperature Tsul of the optimum storage temperature Ts are compared, it is not always necessary to compare.

  In this way, by calculating the first quenching period CP1 during the quenching operation based on the average temperature T1, the set temperature Tr, and the optimum storage temperature Ts, and performing the quenching operation, the state of the incoming cooled object S and the optimum A rapid cooling operation in accordance with the storage temperature Ts can be performed. In addition, in FIG. 9, although illustrated about the case where 1st quenching period CP1 and 2nd quenching period CP2 are set, as shown in Embodiment 2 of FIG.6 and FIG.7 in addition to this, at the time of quenching operation The set temperature Tr10 may be set. In this case, the operation control unit 34 performs control so that the rapid cooling operation is performed using the set temperature Tr10 calculated by the set temperature calculation unit 131 and the rapid cooling periods CP1 and CP2 set by the rapid cooling period setting unit 231. To do.

Embodiment 4 FIG.
FIG. 10 is a block diagram showing a fourth embodiment of the cooling control device in the refrigeration system of the present invention, and the cooling control device 330 will be described with reference to FIG. In the cooling control device 330 of FIG. 10, parts having the same configuration as the cooling control device 30 of FIG. 3 are denoted by the same reference numerals and description thereof is omitted. The cooling control device 330 in FIG. 10 is different from the cooling control device 30 in FIG. 3 in that the operation control means 334 uses the point conversion table 331 to determine the set temperature Tr and necessity of the rapid cooling operation.

  First, the operation control means 334 calculates an average value T10 of intermediate values of the optimum storage temperatures Ts of all the objects to be cooled S in the refrigeration / refrigerator RW including the objects to be cooled newly received during normal operation. The average value T10 is set to the set temperature Tr. In addition, when one to-be-cooled object S (temperature monitoring apparatus 20) is stored, the operation control means 334 determines the temperature of the to-be-cooled object S and the optimum storage temperature Ts acquired at 10-minute intervals in the temperature sensor 21. Are compared, and when the temperature of the object S to be cooled is higher than the upper limit temperature Tsul of the optimum storage temperature Ts, the rapid cooling operation is performed by lowering the set temperature Tr by a predetermined temperature set in advance. On the other hand, when the temperature of the object to be cooled S is lower than the lower limit temperature Tsdl of the optimum storage temperature Ts, the set temperature Tr is raised by a preset predetermined temperature to perform the energy saving operation.

  When a plurality of objects to be cooled S (temperature monitoring devices 20) are stored, the operation control means 334 determines whether or not the temperature of the object to be cooled S measured by the temperature sensor 21 is higher than the optimum storage temperature Ts. It judges for every to-be-cooled object S. Here, the operation control means 334 performs score conversion of the comparison result using the score conversion table 331 that converts the comparison result between the temperature of the object S to be cooled and the optimum storage temperature Ts into a score.

  FIG. 11 is a schematic diagram showing an example of the point conversion table 331 stored in the set temperature calculation means of FIG. As shown in FIG. 11, in the point conversion table 331, a temperature difference between the optimum storage temperature Ts and the temperature of the object S to be cooled, and information on points according to the temperature difference are set. 0 point when the temperature of the object to be cooled S is within the optimum storage temperature Ts, +1 point when the temperature of the object to be cooled S is lower than the lower limit temperature Tsdl of the optimum storage temperature Ts, and the temperature of the object to be cooled S is optimum storage When the temperature Ts is higher than the upper limit temperature Tsul, -1 point is set, and when the temperature of the object S to be cooled is higher than the storage limit temperature Tt, -4 points are set.

  When the object to be cooled S is higher than the upper limit temperature Tsul of the optimum storage temperature Ts, the operation control means 334 subtracts the number of subtraction points (negative) according to the temperature difference between the temperature of the object to be cooled S and the upper limit temperature Tsul of the optimum storage temperature Ts. Is attached). On the other hand, when the temperature of the object to be cooled S is lower than the lower limit temperature Tsdl of the optimum storage temperature Ts, the number of points added according to the temperature difference between the temperature of the object to be cooled S and the lower limit temperature Tsdl of the optimum storage temperature Ts (positive value) ) The case where the number of subtraction points is attached corresponds to a situation where a rapid cooling operation is required, and the case where an addition point is attached corresponds to a state where energy saving operation is possible.

  In addition, although the operation control means 334 has illustrated about the case where a score is calculated based on the temperature of the to-be-cooled object S, you may weight the score derived | led-out by the score conversion table 331 by weight. Specifically, the operation control unit 334 calculates the ratio of the weight of each object to be cooled to the weight of all objects to be cooled S (= weight of objects to be cooled S / weight of all objects to be cooled). The total score is calculated by multiplying the weight of the object to be cooled S by the weight ratio. As a result, it is possible to set the set temperature or determine whether or not the rapid cooling operation is necessary in consideration of the property that the heavier the weight, the harder it becomes to cool.

  Thereafter, the operation control means 334 calculates points for each of the plurality of objects to be cooled S from the point conversion table 331, and then adds up the points for all the objects to be cooled S. When the total score is smaller than 0, the operation control means 334 lowers the set temperature Tr, and the operation control means 34 performs the rapid cooling operation again. On the other hand, when the total score is greater than 0, the operation control means 334 increases the set temperature Tr, and the operation control means 34 performs an energy saving operation.

  When the total score is 0, the set temperature Tr is not moved up and down in principle. However, since there is a range in the set temperature Tr where the total number of points becomes 0, it is not always in an optimum state as viewed from the user. Therefore, even if the total score is 0, if the predetermined condition is satisfied, control is performed to increase the set temperature Tr. Specifically, the case where the total score is 0 includes the case where the score of all the objects to be cooled S is 0 and the case where the sum of addition and subtraction is 0. Among these, when the scores of all the objects to be cooled S are 0, if the upper limit value of the overlapping temperature range where the optimum storage temperature Ts overlaps is equal to or higher than the set temperature Tr, the operation control means 334 sets the set temperature Tr. Control is performed so that energy-saving operation is performed by raising the temperature by a predetermined temperature. Thereby, even if it is a case where a total score is 0, according to the state of the to-be-cooled object S, an energy-saving driving | operation can be performed.

  FIG. 12 is a diagram illustrating an operation example of the freezing and refrigeration system of FIG. As shown in FIG. 12, when a new object to be cooled S is stored in the refrigeration / refrigerator RW in a state where normal operation is performed, the rapid cooling operation is performed with the predetermined set temperature Tr and the rapid cooling period CP described above ( 1 to 9). Then, after the quenching operation is completed, the operation control means 34 switches from the quenching operation to the normal operation. At this time, the set temperature Tr during normal operation is calculated based on the average value T10, and normal operation is performed using the calculated set temperature Tr.

  At this time, the operation control means 334 calculates the total score using the score conversion table 331. When the total score is a positive value, the set temperature Tr is set higher by a predetermined temperature, and the normal operation with reduced energy consumption is performed. On the other hand, when the total score is a negative value, the set temperature Tr is set lower by a predetermined temperature, and the rapid cooling operation is started again.

  In this way, by using the point conversion table 331, setting of the set temperature Tr during the normal operation after the rapid cooling operation, and further controlling the operation operation, the cooling control in consideration of the object to be cooled S newly received. Therefore, the cooling control according to the state of the object to be cooled S can be performed with higher accuracy.

  The embodiment of the present invention is not limited to the above embodiment. For example, in FIGS. 1 to 3, the information acquisition unit exemplifies a case where the object information SD is read from the IC tag. The to-be-cooled object information SD may be acquired at the time of warehousing.

  Further, although the optimum storage temperature Ts is illustrated as being included in the object information SD to be cooled, the optimum storage temperature Ts may be stored for each type of article on the cooling control device 30 side. And when the kind of goods of the to-be-cooled object S is transmitted in the cooling control apparatus 30, you may make it extract the optimal storage temperature Ts according to the kind of goods.

  Moreover, in the said embodiment, although the case where the rapid cooling period is a predetermined period or the period calculated beforehand is illustrated, when the temperature by the temperature sensor 21 reaches a set temperature, the rapid cooling operation is stopped and the normal operation is performed. You may make it perform. As a result, the rapid cooling operation is continued until the object to be cooled S is actually cooled to a predetermined temperature, so that the quality deterioration of the object to be cooled S can be reliably suppressed.

  Furthermore, in the said embodiment, although illustrated about the case where temperature history data consists of temperature data of the 1-hour interval for 4 hours, it is not restricted to this, For example, it is a predetermined time interval (for example, from shipment to warehousing) What is necessary is just to consist of temperature data at the time of conveyance before the to-be-cooled object S such as a plurality of temperature data acquired at intervals of 10 minutes).

  DESCRIPTION OF SYMBOLS 1 Refrigeration system 2 Cooling device 3 Transport material 10 Information reading device 20 Temperature monitoring device 21 Temperature sensor 22 Control controller 23 Storage unit 24 Tag reading unit 25 Information transmission unit 30, 130 230, 330 Cooling control device, 31 data acquisition means, 32 database, 33 rapid cooling determination means, 34, 334 operation control means, 131 set temperature calculation means, 231 rapid cooling period setting means, 331 point conversion table, CP rapid cooling period, CP1 1 quenching period, CP2 second quenching period, RW freezer / refrigerator, S cooled object, SD cooled object information, T1 average temperature, Th temperature history data, Tr, Tr10 set temperature, Ts optimum storage temperature, Tsdl lower limit temperature, Tsul upper limit temperature, Tt storage limit temperature.

Claims (13)

A freezing and refrigeration system comprising a cooling device that cools the inside of the refrigerator-freezer, a cooling control device that controls the cooling device, and a temperature monitoring device that monitors the temperature of an object to be cooled that is stored in the refrigerator-freezer,
The temperature monitoring device is:
A temperature sensor that measures the temperature of the object to be cooled at the time of conveyance as the object temperature;
A storage unit for storing a history of the temperature of the object to be cooled measured by the temperature sensor as temperature history data;
An information transmission unit that transmits the temperature history data stored in the storage unit to the cooling control device,
The cooling control device includes:
Data acquisition means for acquiring the temperature history data from the temperature monitoring device;
Rapid cooling determination means for determining whether or not a rapid cooling operation is required for the object to be cooled based on the temperature history data acquired by the data acquisition means at the time of receiving the object to be cooled;
An operation control means for controlling the cooling device to perform a rapid cooling operation when the rapid cooling determination means determines that rapid cooling is required. The data acquisition means is for acquiring object information including an optimum storage temperature suitable for storing the object to be cooled in the refrigerator-freezer,
The freezing / refrigeration system according to claim 1, wherein the rapid cooling determination means determines whether or not the rapid cooling operation is necessary by comparing an average temperature of the temperature history data with the optimum storage temperature. An IC tag storing the object information to be cooled is attached to the object to be cooled.
The freezing and refrigeration system according to claim 2, wherein the data acquisition means acquires information on an object to be cooled read from the IC tag by an IC tag reader. In the optimum storage temperature, a temperature range from a lower limit temperature to an upper limit temperature is defined,
The said rapid cooling determination means determines that the rapid cooling operation is necessary when the average temperature of the temperature history data is higher than the upper limit temperature of the optimum storage temperature. Refrigeration system. The operation control means stores a set temperature in the refrigerator-freezer,
The said rapid cooling determination means determines that rapid cooling operation is required when the upper limit temperature of the said optimal storage temperature is higher than preset temperature, The any one of Claims 2-4 characterized by the above-mentioned. Refrigeration system.   When a plurality of the objects to be cooled are stored in the refrigerator-freezer, the rapid cooling determination unit performs rapid cooling when the upper limit temperature of the overlapping temperature range of the optimum storage temperature for each of the plurality of objects to be cooled is lower than a set temperature. 6. The refrigeration system according to claim 5, wherein it is determined that the operation is necessary. The cooling control device further includes a set temperature calculation means for calculating a set temperature during a rapid cooling operation using the optimum storage temperature,
The said operation control means controls the said cooling device at the time of rapid cooling operation using the preset temperature calculated by the said preset temperature calculation means, The any one of Claims 2-6 characterized by the above-mentioned. Refrigeration system.   When a plurality of the objects to be cooled are stored in the refrigerator-freezer, the operation control means calculates the upper limit temperature of the overlapping temperature range of the optimum storage temperature for each of the plurality of objects to be cooled as a set temperature. The refrigeration system of Claim 7. The cooling control device further includes a quenching period setting means for calculating a quenching period for performing a quenching operation using the temperature history data,
The refrigeration system according to any one of claims 1 to 8, wherein the operation control means performs a rapid cooling operation in the rapid cooling period set by the rapid cooling period setting means. The cooling control device further includes a set temperature calculating means for calculating a set temperature during normal operation after the rapid cooling operation using the optimum storage temperature,
The said operation control means controls the said cooling device at the time of normal operation after rapid cooling operation using the preset temperature calculated by the preset temperature calculation means. The freezing and refrigeration system of item 1. In the optimum storage temperature, a temperature range from a lower limit temperature to an upper limit temperature is defined,
The cooling control device has a positive score when the average temperature of the temperature history data is lower than the lower limit temperature of the optimum storage temperature, and negative when the average temperature is higher than the upper limit temperature of the optimum storage temperature. Further having a point conversion table for converting the average temperature into points so that
The operation control means calculates the scores of all the objects to be cooled stored in the refrigerator using the score conversion table, and the total score of all the objects to be cooled is a positive value. The cooling device is controlled so that normal operation is performed by raising the set temperature that has already been set to a predetermined temperature, and when the total number of all the objects to be cooled is a negative value, the set temperature that has already been set The refrigeration system according to any one of claims 2 to 10, wherein the cooling device is controlled so that the temperature is lowered by a predetermined temperature and the rapid cooling operation is performed again. The object information includes the weight information of the object to be cooled,
The operation control means, when calculating the number of points of the object to be cooled, multiplies the points converted using the point conversion table by the ratio of the weight of the object to be cooled to the total weight of all the objects to be cooled. The refrigeration system according to claim 11, wherein   The said temperature monitoring apparatus is attached to the material for conveyance used for conveyance of the said to-be-cooled object stored in the said refrigerator-freezer, The any one of Claims 1-12 characterized by the above-mentioned. Refrigeration system.

Images