Software grouping type refrigeration / refrigeration control system

Abstract

The present invention relates to a software grouping method for refrigeration / freezing control systems that flexibly respond to the expansion and contraction of a chamber by grouping multiple unit coolers within a chamber using software (S / W) and enabling integrated refrigeration / freezing control to be performed on a single control computer. The system comprises a control computer that groups package unit coolers within a connected chamber, monitors and integrally controls the status of all grouped package unit coolers, designates a master and a slave within the group of package unit coolers, and performs control and monitoring of all package unit coolers within the chamber through control and monitoring with the designated master package unit cooler, and a package unit cooler unit that is set as a master package unit cooler or a slave package unit cooler for operation control, wherein the master package unit cooler transmits control commands to the connected slave package unit cooler and acquires status information of the slave package unit cooler and transmits it to the control computer.

Description

Technology Field

[0001] The present invention relates to a refrigeration / freezing control system that groups units using software through an algorithm that devises a method in which it is very difficult to reduce or expand a refrigeration / freezing group by connecting a main control panel, which is the entity controlling the unit cooler that has been used in the past, and the unit cooler via hardware. In particular, the invention relates to a refrigeration / freezing control system using a software grouping method that groups multiple unit coolers within a chamber using software (S / W) and enables integrated refrigeration / freezing control to be performed on a single control computer, thereby allowing for flexible response to the expansion and reduction of the chamber, and reduces installation costs by removing the control panel provided in each chamber and enabling control to be performed by connecting the unit coolers within the chamber and the control computer only with power lines and communication lines. Background Technology

[0002] Freezing and refrigeration refer to the process of maintaining a temperature using a machine called a freezer to prevent the denaturation of food or substances and to preserve them at a specific temperature.

[0003] A refrigeration unit is equipped with four major components: a compressor, a condenser, an expansion valve, and an evaporator. It utilizes a substance called a refrigerant, which acts as a heat transfer medium, to compress the refrigerant into a high-pressure, high-temperature gas in the compressor, condense the high-temperature, high-pressure gas into a high-pressure liquid at room temperature in the condenser, change the high-pressure liquid into a low-temperature, low-pressure liquid in the expansion valve, and convert the low-temperature, low-pressure liquid refrigerant into a low-temperature, low-pressure gas through heat exchange in the evaporator.

[0004] An evaporator is a device located indoors that lowers the surrounding temperature as a low-temperature, low-pressure liquid absorbs heat from the surroundings through heat exchange and turns into gas.

[0005] In a broad sense, freezing refers to maintaining a temperature lower than the surroundings. However, to distinguish and apply it in daily life, the terms refrigeration and freezing are used separately. Refrigeration refers to the storage and maintenance of non-frozen food, covering the temperate zone of 10°C to -5°C. Freezing refers to the storage and maintenance of frozen food, covering the temperature range of -15°C to -60°C, with -25°C serving as the standard.

[0006] The refrigeration system described above is required to create the temperature ranges for refrigeration and freezing. To operate the refrigeration system, the motor built into the compressor is rotated by electric power to compress the refrigerant, creating a high-pressure heat transfer medium (refrigerant) that is then circulated, thereby achieving a low temperature in the evaporator. In other words, electricity must be consumed to create the conditions for refrigeration and freezing.

[0007] The difference in the operating characteristics of refrigerants for refrigeration and freezing lies in the difference in power consumption during compression by the compressor at the same load. In the case of refrigeration operation, power consumption is low because the specific volume of refrigerant gas drawn into the compressor is small under the same refrigerant conditions, whereas in the case of freezing operation, power consumption is high because the specific volume of refrigerant gas drawn into the compressor is large.

[0008] Logistics warehouse systems that use freezing / refrigeration utilize equipment called a unit cooler to forcibly convect low-temperature gas (cold air) generated by refrigeration or freezing operations within the chamber.

[0009] A plurality of unit coolers are provided within a single chamber according to the size of the chamber, and a control panel for controlling the plurality of unit coolers is provided within each chamber.

[0010] Unit coolers used in logistics warehouse facilities require many power and communication lines because they contain two blower fans, a hot gas fan, a heater, and multiple solenoids. Consequently, since multiple power and communication lines are connected by cables between the control panel and a single unit cooler, the larger the chamber, the more unit coolers are installed, and thus the relatively larger the number of power and communication cable connections becomes.

[0011] FIGS. 1 and 2 are control configuration diagrams of a conventional logistics center refrigeration system, which consists of a single integrated monitoring and control computer (70), a room unit cooler panel (10), a work area panel (20), a utility panel (30), a main panel (40), a compressor starter panel (50), a compressor controller (60), etc.

[0012] The above integrated monitoring and control computer (70) monitors the operation, stop, malfunction, speed control, and settings of all devices installed in the refrigeration system, performs control such as monitoring the selection, settings (automatic, manual, operation value), operation, stop, speed control, and operation commands for all devices installed in the refrigeration system, and performs a logging function for communication, operation status, and values.

[0013] In addition, the room unit cooler panel (10) provided within the chamber implements a room unit cooler device by connecting a control panel (11) equipped with a DDC, MCCB, MC, EOCR, communication device, fan and heater power control, refrigeration / freezing / defrosting solenoid, temperature sensor input module, etc., and a unit cooler section (12) composed of a unit cooler, solenoid valve, temperature sensor, etc., via multiple cables. In order for the control panel (11) and the unit cooler section (12) to interface power and control signals, communication device cables, fan and heater power control cables, refrigeration / freezing / defrosting solenoid valve cables, temperature sensor cables, etc., are provided, and the control panel and the unit cooler are connected via multiple power line and communication line cables.

[0014] In addition, the Work Area panel (20) is connected to the unit cooler (21) via a communication device cable and a plurality of power and communication cables between the control panel and the unit cooler to interface power and control signals between the control panel and the unit cooler.

[0015] As a result, multiple cables are laid from the room unit cooler panel and the work area panel to the unit cooler, which leads to losses in material and labor costs and the unreasonableness of having to inspect both the unit cooler panel and the unit cooler in the event of a failure. Prior art literature

[0016] Republic of Korea Registered Patent 10-2410819 (Refrigeration system for logistics centers capable of high-efficiency operation over a wide temperature range, for both refrigeration and freezing) Republic of Korea Registered Utility Model 20-0407733 (Logistics management system for frozen, refrigerated, or low-temperature distribution logistics warehouses) Republic of Korea Registered Patent 10-2241684 (Refrigeration system equipped with a single unit cooler and a backup refrigeration device) Republic of Korea Registered Patent 10-2009900 (Cold chain-based smart refrigeration and freezing system) The problem to be solved

[0017] Accordingly, the present invention is proposed to solve the various problems arising from general freezing / refrigeration logistics systems and prior art as described above, and aims to provide a freezing / refrigeration control system using a software grouping method that can flexibly respond to the expansion and contraction of the chamber by grouping a plurality of unit coolers within the chamber into software (S / W) and enabling integrated freezing / refrigeration control to be performed on a single control computer.

[0018] Another objective of the present invention is to provide a software grouping type refrigeration / freezing control system that can reduce the cost of installing control panels and the material and labor costs for power and communication lines between two pieces of equipment by removing the control panel provided in each chamber and connecting the unit cooler in the chamber and the control computer only with power lines and communication lines for control to enable integrated control.

[0019] Another objective of the present invention is to provide a software grouping type refrigeration / freezing control system that improves control accuracy by distributing the functions of the unit cooler control panel between the control computer and the unit cooler, and ensures safety in the operation of the refrigeration / freezing equipment by configuring multiple unit coolers in a master-slave configuration so that the master unit cooler performs the corresponding control functions even when communication with the control computer is interrupted.

[0020] Another objective of the present invention is to provide a software grouping type refrigeration / freezing control system that achieves energy savings by solving the problem of transient response through existing PID control by collecting driving data to secure it as big data and operating it using a predictive driving program set through big data analysis using a Python program. means of solving the problem

[0021] In order to achieve the above-mentioned purpose, the "software grouping method refrigeration / freezing control system" according to the present invention comprises:

[0022] A control computer that groups package unit coolers within a connected chamber, monitors and integrally controls the status of all grouped package unit coolers, designates a master and a slave within the group of package unit coolers, and performs control and monitoring of all package unit coolers within the chamber through control and monitoring with the designated master package unit cooler; and

[0023] The master package unit cooler is configured to operate as a master package unit cooler or a slave package unit cooler according to the control of the control computer, and the master package unit cooler is characterized by including a package unit cooler unit that transmits control commands to a connected slave package unit cooler and acquires status information of the slave package unit cooler and transmits it to the control computer.

[0024] The control computer mentioned above is,

[0025] The method is characterized by designating a master package unit cooler and a slave package unit cooler for a grouped package unit cooler, and providing different identification information (ID) to the designated master package unit cooler and slave package unit cooler to distinguish between the master and the slave and control the functions.

[0026] The above is characterized by the fact that the control computer and the plurality of package unit coolers of the package unit cooler unit are connected by a single power line and a single communication line for control.

[0027] The control computer mentioned above is,

[0028] It is characterized by collecting operation data of package unit coolers to secure it as big data, generating a predictive operation model through big data analysis using a Python program, and controlling the operation of each package unit cooler using the generated predictive operation model to achieve energy savings by eliminating transient response.

[0029] The package unit cooler section mentioned above is,

[0030] The master package unit cooler receives an operation control command from the control computer and uses it for its own operation while simultaneously transmitting the operation control command to a connected slave package unit cooler, acquires status information of the slave package unit cooler, combines it with its own status information, and transmits it to the control computer, and in the event of a loss of communication with the control computer, controls the operation of the connected slave package unit cooler itself according to a preset operation execution logic to improve operation safety.

[0031] The package unit cooler section mentioned above is,

[0032] A plurality of package unit coolers are grouped, and each of the grouped package unit coolers is characterized by having an MCCB, MC, EOCR, Relay, control device, unit cooler, solenoid valve, and temperature sensor integrated into a single panel.

[0033] In the above, each package unit cooler within the package unit cooler section is,

[0034] The invention is characterized by the installation of a heat exchange copper pipe to inject hot gas generated during the operation of an electric heater or a refrigerator compressor into the chassis of the electric control system in order to maintain the internal temperature of the chassis containing the control device and prevent condensation, thereby protecting the electric control system from low temperature and high humidity of -25℃ or -32℃ inside the chamber during operation through the injection of said hot gas. Effects of the invention

[0035] According to the present invention, by grouping a plurality of unit coolers within a chamber with software (S / W) and enabling integrated freezing / refrigeration control to be performed on a single control computer, there is an effect of being able to flexibly respond to the expansion and contraction of the chamber.

[0036] In addition, according to the present invention, by removing the control panel provided in each chamber and connecting the unit cooler in the chamber and the control computer only with power lines and communication lines to enable integrated control, the cost of installing the control panel can be reduced.

[0037] In addition, according to the present invention, the accuracy of control can be improved by distributing the functions of the unit cooler control panel between the control computer and the unit cooler.

[0038] In addition, according to the present invention, a plurality of unit coolers are configured in a master-slave configuration so that the master unit cooler performs the corresponding control function even when communication with the control computer is disconnected, thereby improving the operational safety of the refrigeration / freezing equipment.

[0039] In addition, according to the present invention, by collecting driving data to secure it as big data and using a Python program to perform driving using a predictive driving program set through big data analysis, it is possible to solve the problem of transient response through existing PID control and achieve energy savings.

[0040] In addition, according to the present invention, a heat exchange copper pipe is installed to inject hot gas generated during the operation of an electric heater or a refrigerator compressor into the chassis of an electric control system in order to maintain an internal temperature. Through the injection of said hot gas, the electric control system can be stably protected from low temperature and high humidity of -25℃ or -32℃ inside the chamber during operation. Brief explanation of the drawing

[0041] FIGS. 1 and 2 are configuration diagrams of a conventional freezing / refrigeration system for a logistics warehouse, and FIGS. 3 and 4 are configuration diagrams of a freezing / refrigeration control system using a software grouping method according to the present invention, and FIG. 5 is a flowchart of a predictive driving algorithm for predictive driving in the present invention, and FIG. 6 is a design structure of a communication protocol in the present invention, and FIG. 7 is an example of a GUI to which software function selection and grouping are applied in the present invention. Specific details for implementing the invention

[0042] A software grouping method refrigeration / freezing control system according to a preferred embodiment of the present invention will be described in detail below with reference to the attached drawings.

[0043] The terms or words used in the present invention described below should not be interpreted as being limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0044] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely preferred embodiments of the present invention and do not represent all technical concepts of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0045] FIGS. 3 and 4 are configuration diagrams of a software grouping type refrigeration / freezing control system according to a preferred embodiment of the present invention, and may largely include a control computer (100), a package unit cooler unit (210), a utility panel (230), a main panel (240), a compressor starter panel (250), and a compressor controller (260).

[0046] Here, the Utility panel (230) is similar in configuration and operation to the conventional Utility panel (30) of FIG. 1, the Main panel (240) is identical in configuration and operation to the conventional Main panel (40) of FIG. 1, the Compressor Starter Panel (250) is identical in configuration and operation to the conventional Compressor Starter Panel (50) of FIG. 1, and the Compressor Controller (260) is identical in configuration and operation to the conventional Compressor Controller (60) of FIG. 1. Therefore, the configuration and operation of the Utility panel (230), Main panel (240), Compressor Starter Panel (250), and Compressor Controller (260) will be described by referring to FIG. 1, and a detailed description thereof will be omitted.

[0047] The control computer (100) software-groups the package unit coolers within the connected chamber, monitors and integrates the status of all grouped package unit coolers, designates a master and a slave in the group of package unit coolers, and performs the control and monitoring of all package unit coolers within the chamber through control and monitoring with the designated master package unit cooler.

[0048] The above control computer (100) can be said to be a general PC that implements control functions and monitoring functions, etc., to perform the functions of an existing unit cooler control panel in software.

[0049] This control computer (100) can designate a master package unit cooler and a slave package unit cooler for the grouped package unit coolers, and provide different identification information (ID) to the designated master package unit cooler and slave package unit cooler to distinguish between the master and the slave and control the functions.

[0050] In addition, the control computer (100) collects operating data of the package unit cooler and secures it as big data, generates a predictive operating model through the analysis of the big data using a Python program, and controls the operation of each package unit cooler using the generated predictive operating model to achieve energy savings by eliminating transient response.

[0051] The package unit cooler unit (210) is set to a master package unit cooler or a slave package unit cooler according to the control of the control computer (100) and operation control is performed, and the master package unit cooler transmits control commands to the connected slave package unit cooler and acquires status information of the slave package unit cooler and transmits it to the control computer (100).

[0052] In the present invention, two package unit coolers (211, 212) are grouped in the package unit cooler section (210), but the number is not limited thereto, and it will be obvious to those skilled in the art that the number of package unit coolers within the group may vary depending on the control temperature of the chamber and the size of the chamber. Here, the package unit cooler is a cooler in which the control panel and the unit cooler equipment are integrated into one, unlike the conventional unit cooler shown in FIGS. 1 and 2. This package unit cooler can be understood as having the functions of the existing control panel implemented together in the unit cooler, thereby eliminating the control panel.

[0053] The control computer (100) and the plurality of package unit coolers (211, 212) of the package unit cooler unit (210) are connected by only a single power line and a single communication line.

[0054] Power is supplied to the parts of the package unit cooler that require power using power supplied through a single power line, all control commands of the control computer are transmitted to the package unit coolers within the group through a single communication line, and status information obtained from the package unit coolers is transmitted to the control computer through the single communication line.

[0055] The master package unit cooler (e.g., 211) of the package unit cooler section (210) receives an operation control command from the control computer (100) and uses it for its own operation, while simultaneously transmitting the operation control command to a connected slave package unit cooler (e.g., 212). It also acquires status information of the slave package unit cooler (212), combines it with its own status information, and transmits it to the control computer (100). In the event of a communication loss with the control computer (100), it can improve operation safety by controlling the operation of the connected slave package unit cooler (212) itself according to a preset operation execution logic.

[0056] Here, the master package unit cooler is set to 211 and the slave package unit cooler is designated as 212, but depending on the state of each package unit cooler, the master package unit cooler can be designated as 212 and the slave package unit cooler as 211. The designation of the master unit cooler and the slave unit cooler can be easily set by simply selecting the unit cooler through software via the UI of the control computer (100).

[0057] The above package unit cooler section (210) is configured with a plurality of package unit coolers (211, 212) grouped together, and each of the grouped package unit coolers has an MCCB, MC, EOCR, Relay, control device, unit cooler, solenoid valve, and temperature sensor integratedly implemented on a single panel.

[0058] In addition, each package unit cooler (211, 212) within the package unit cooler section (210) is equipped with a heat exchange copper pipe to inject hot gas generated during the operation of an electric heater or refrigerator compressor into the chassis of the electric control system in order to maintain the internal temperature, so that the electric control system can be protected from low temperature and high humidity of -25°C or -32°C inside the chamber during operation through the injection of the hot gas.

[0059] The operation of the software grouping method refrigeration / freezing control system according to the present invention configured as described above is specifically explained as follows.

[0060] First, the control computer (100) and the package unit cooler unit (210) are interconnected using a single power line (301) for power supply and a single network line (302) for transmitting operation control commands and obtaining status information. Here, the network can be implemented using a communication other than Ethernet (TCP / IP). FIG. 6 is a communication protocol design, which is a CC interface data frame structure. The data frame structure may consist of an 11-bit identification information (ID) area, a control field of a predetermined number of bits, a control field where control data of a predetermined number of bits is recorded, an ACK field for acknowledging a response, and a control field area for error correction, etc.

[0061] With the control computer (100) and a plurality of package unit coolers within the package unit cooler section (210) interconnected by power lines and communication lines as described above, a manager managing the refrigeration / freezing equipment of the logistics warehouse groups the package unit coolers within the chamber software-wise using the UI of the control computer (100).

[0062] Here, the UI for grouping package unit coolers may include, as shown in FIG. 7, a master or slave function designation icon for distinguishing a specific package unit cooler as a master and a slave, an ID assignment area for assigning an ID, a refrigeration control setting area, an operation control area, a temperature control area, etc.

[0063] The administrator can display this UI on the screen and designate all package unit coolers in the chamber as masters and slaves by simply assigning them to the corresponding icons or areas or entering IDs, and can assign IDs to identify each package unit cooler.

[0064] It is desirable to group several package unit coolers inside the chamber together.

[0065] Here, each chamber may have a different size, and due to this difference in size, the number of unit coolers installed in the chamber may vary, and additionally, the groups may also be grouped differently in terms of the number of unit coolers.

[0066] When the unit coolers in the chamber are grouped by software as described above, the control computer (100) communicates only with the master package unit cooler (211) of the grouped package unit coolers to transmit operation control commands, and obtains the status values ​​of all package unit coolers in the group through the master package unit cooler (211).

[0067] By acquiring and analyzing status information of all package unit coolers within a group through a single communication line, it is possible to quickly identify the package unit cooler that has failed. This function resolves the inefficiencies, such as wasted time and loss of manpower, that are required to inspect all unit cooler panels and unit coolers in the event of a failure, as is the case with conventional methods.

[0068] The control computer (100) integrates all functions performed by the control panel of the existing unit cooler, such as fan and heater power control function, refrigeration and freezing selection and temperature control value selection function (operation, deviation, maximum, minimum, Deprost Stop, target temperature), solenoid control function related to refrigeration / freezing / defrosting, chamber temperature (suction, discharge, evaporator coil temperature) measurement and monitoring, control storage function, control function by receiving a remote signal, operating temperature alarm function (fault alarm display function), time synchronization function between the control PC and DDC (once a day or when controlled by an operator), defrosting operation time setting function (Emptying -> Deprosting -> Precooling -> Deprost Stop), software group ID storage function, software group master / slave function, operation count and measurement, set temperature log function, log function when communication is connected and disconnected, master logic execution function when communication is disconnected, and energy saving function according to the predictive operation command. In particular, cost reduction can be achieved through the reduction of power control cables between the existing unit cooler control panel and the unit cooler.

[0069] For example, a group selection function is created in the control computer (PC), and the package unit cooler is tracked and controlled one group at a time according to the designated Group No., taking into account the balance of the target temperature, refrigeration, freezing, and defrosting operations.

[0070] Next, the control computer is configured to select the Master & Salve selection function. When the control computer and the Group are connected via communication, operation is performed according to the operation logic of the control computer. When communication is disconnected, the Package Unit Cooler designated as the Master of the Group controls the balance of temperature, refrigeration, freezing, and defrosting operations for the Slaves within the Group according to a pre-set logic execution command, thereby ensuring operational safety.

[0071] By performing operation control commands and status information interfaces (monitoring) only between the control computer and the master package unit cooler within the group, the amount of data transmitted between them can be drastically reduced compared to the existing method, which consequently creates the effect of improving control accuracy.

[0072] Meanwhile, the package unit cooler unit (210) is set to a master package unit cooler (211) or a slave package unit cooler (212) according to the control of the control computer (100) and operation control is performed, and the master package unit cooler (211) transmits an operation control command to the connected slave package unit cooler (212) and obtains status information of the slave package unit cooler (212) and transmits it to the control computer (100).

[0073] Here, the grouped package unit coolers (211, 212) each have an MCCB, MC, EOCR, Relay, control device, unit cooler, solenoid valve, and temperature sensor integrated and implemented on a single panel. When the control device is in master function, it is connected to a control computer via communication and then connected to a slave package unit cooler, and when it is in slave function, it communicates only with the master package unit cooler.

[0074] The package unit coolers grouped in this way receive driving power through a single power line (310), communication between the master package unit cooler (211) and the control computer (100) is established through a single communication line (302), and communication between the master package unit cooler (211) and the slave package unit cooler (212) is established through a single communication line (302).

[0075] For example, when the master package unit cooler (211) of the package unit cooler section (210) receives an operation control command from the control computer (100), it uses it for its own operation and simultaneously transmits the operation control command to the connected slave package unit cooler (212) via a communication line. In addition, when the master package unit cooler (211) obtains status information of the slave package unit cooler (212), it combines it with its own status information and transmits it to the control computer (100). Through this data communication, the transmission of operation control commands and the acquisition of status information can be easily implemented.

[0076] Meanwhile, another feature of the present invention is that control of all package unit coolers in the group can be performed normally even when communication with the control computer is lost.

[0077] For example, when communication with the control computer (100) is lost, the master package unit cooler (211) controls the operation of the connected slave package unit cooler (212) according to a preset operation execution logic. Through this control, operational safety can be improved.

[0078] In addition, as another feature of the present invention, energy saving is achieved by using a power control algorithm, and the transient response problem is also solved.

[0079] For example, the control computer (100) collects operation data of all slave package unit coolers in the group through the master package unit cooler (211) and obtains it as big data. Then, a predictive operation model is generated through the analysis of the big data using a Python program. Here, the predictive operation model uses one of multi-class logistic regression, linear regression, artificial neural network regression, or K-means clustering to set an optimal operation target value and control predictive operation, thereby solving the problem of transient response through conventional PID control and thereby promoting energy saving. That is, since the conventional PID control method performs temperature control using the difference between the current temperature and the control temperature when the control temperature is set, if temperature control is performed at the point where the difference becomes zero, it causes a transient response in which the temperature rises above or falls below the control temperature. However, the predictive driving model of the present invention collects driving data as big data and performs temperature control in advance through predictive driving before a transient response occurs at an appropriate time, thereby preventing energy waste by ensuring that a transient response does not occur at the time the control temperature is reached.

[0080] In addition, another feature of the present invention is that it can protect the electric control system.

[0081] For example, to prevent outside air from entering the interior of the electric control system, the IP (Ingress Protection) rating of the electric control system's chassis was upgraded from IP44 to IP56.

[0082] In addition, each package unit cooler (211, 212) within the package unit cooler section (210) is equipped with a heat exchange copper pipe to inject hot gas generated during the operation of an electric heater or refrigerator compressor into the chassis of the electric control system in order to maintain the internal temperature. By using this heat exchange copper pipe to inject the hot gas into the chassis, the electric control system can be protected from low temperature and high humidity of -25°C or -32°C inside the chamber during operation.

[0083] According to the present invention described above, by grouping a plurality of unit coolers within a chamber with software (S / W) and enabling integrated freezing / refrigeration control to be performed on a single control computer, it is possible to flexibly respond to the expansion and contraction of the chamber.

[0084] According to the present invention, by removing the control panel provided in each chamber and connecting only power lines and communication lines between the unit cooler in the chamber and the control computer to enable integrated control, the cost of installing the control panel can be reduced.

[0085] In addition, according to the present invention, the accuracy of control can be improved by distributing the functions of the unit cooler control panel between the control computer and the unit cooler, and the operational safety of the refrigeration / freezing equipment can be improved by setting multiple unit coolers in a master-slave configuration so that the master unit cooler performs the corresponding control functions even when communication with the control computer is disconnected.

[0086] In addition, according to the present invention, by collecting driving data to secure it as big data and using a Python program to perform driving using a predictive driving program set through big data analysis, the problem of transient response through conventional PID control can be solved and energy saving can be achieved.

[0087] In addition, according to the present invention, a heat exchange copper pipe is installed to inject hot gas generated during the operation of an electric heater or a refrigerator compressor into the chassis of an electric control system in order to maintain an internal temperature, and through the injection of said hot gas, the electric control system can be stably protected from low temperature and high humidity of -25℃ or -32℃ inside the chamber during operation.

[0088] Although the invention made by the inventors has been specifically described according to the above embodiments, it is obvious to those skilled in the art that the invention is not limited to the above embodiments and can be modified in various ways without departing from the gist thereof. Explanation of the symbols

[0089] 100: Control computer (PC) 210: Package Unit Cooler 211: Master Package Unit Cooler 212: Slave Package Unit Cooler 230: Utility Panel 240: Main Panel 250: Compressor starter 260: Compressor Controller 301: Power line 302: Communication line (communication line)

Claims

Claim 1 A control computer that groups package unit coolers within a connected chamber, monitors and integrally controls the status of all grouped package unit coolers, designates a master and a slave within the group of package unit coolers, and performs control and monitoring of all package unit coolers within the chamber through control and monitoring with the designated master package unit cooler; Operation control is performed by setting the master package unit cooler or slave package unit cooler according to the control of the control computer, and the master package unit cooler includes a package unit cooler unit that transmits control commands to the connected slave package unit cooler and acquires status information of the slave package unit cooler and transmits it to the control computer; the control computer software-groups the package unit coolers within the connected chamber using a UI, and the UI for grouping the package unit coolers includes a master or slave function designation icon to distinguish a specific package unit cooler as master or slave, an ID assignment area for ID assignment, a refrigeration control setting area, an operation control area, and a temperature control area; the control computer collects operation data of the package unit coolers to secure it as big data, generates a predictive operation model through big data analysis using a Python program, and controls the operation of each package unit cooler using the generated predictive operation model to achieve energy savings by eliminating transient responses To achieve this, the above predictive operation model collects operation data as big data and performs temperature control in advance through predictive operation before a transient response occurs, thereby preventing energy waste by ensuring that a transient response does not occur at the point where the control temperature is reached, and the above package unit cooler receives operation control commands from the control computer at the master package unit cooler and uses them for its own operation while simultaneously transmitting operation control commands to the connected slave package unit cooler.A software grouping type refrigeration / freezing control system characterized by improving operational safety by controlling the operation of a self-linked slave package unit cooler according to a preset operation execution logic when communication with the control computer is lost, wherein each package unit cooler within the package unit cooler section is equipped with a heat exchange copper pipe to inject hot gas generated during the operation of an electric heater or refrigeration compressor into the chassis of the electric control system in order to maintain the internal temperature of the chassis containing the control device and prevent condensation, thereby protecting the electric control system from low temperature and high humidity of -25℃ or -32℃ inside the chamber during operation through the injection of said hot gas. Claim 2 A software grouping type refrigeration / freezing control system, wherein, in claim 1, the control computer designates a master package unit cooler and a slave package unit cooler for a grouped package unit cooler, and provides different identification information (ID) to the designated master package unit cooler and slave package unit cooler to distinguish between master and slave and control functions. Claim 3 A software grouping type refrigeration / freezing control system in claim 1, characterized in that the control computer and a plurality of package unit coolers of the package unit cooler unit are connected by a single power line and a single communication line. Claim 4 delete Claim 5 A software grouping type refrigeration / freezing control system in claim 1, wherein the package unit cooler unit acquires status information of a slave package unit cooler from a master package unit cooler, combines it with its own status information, and transmits it to the control computer. Claim 6 Claim 1, wherein the package unit cooler unit comprises a plurality of package unit coolers grouped together, and each of the grouped package unit coolers is characterized by having an MCCB, MC, EOCR, Relay, control device, unit cooler, solenoid valve, and temperature sensor integratedly implemented on a single panel, thereby forming a software grouping type refrigeration / freezing control system. Claim 7 delete

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