KR20220093728A - Chiller network system - Google Patents

Abstract

According to an aspect of the present invention, a chiller network system includes: a plurality of chillers; a plurality of communication modules respectively connected to the chillers, receiving operation information from the connected chillers, and transmitting operation data based on the operation information of the connected chillers through wireless communication; and a server receiving the driving data from the communication modules, wherein the server may determine whether an abnormality of the chillers and a communication abnormality have occurred based on a reception period of the operation data. Therefore, the chiller can be effectively monitored and managed.

Description

Chiller network system

The present invention relates to a chiller network system and a control method thereof, and more particularly, to a chiller network system capable of effectively monitoring and managing a chiller and a control method thereof.

An air conditioner is a device that discharges hot and cold air into a room to create a comfortable indoor environment. This air conditioner is installed to provide a more comfortable indoor environment to humans by controlling and purifying the indoor temperature.

In general, an air conditioner includes an indoor unit configured as a heat exchanger and installed indoors, and an outdoor unit configured as a compressor and a heat exchanger and supplying refrigerant to the indoor unit.

Meanwhile, among air conditioners, a chiller used in a business or building larger than a home generally includes a cooling tower installed on an outdoor rooftop, and a heat exchange unit that circulates a refrigerant to exchange heat with cooling water sent from the cooling tower. Further, the heat exchange unit is configured to include a compressor, a condenser, and an evaporator.

The chiller, as in the prior literature (Korean Patent Registration No. 10-1084477), supplies cold water to the cold water demanding destination, and heat exchange is performed between the refrigerant circulating in the refrigeration system and the cold water circulating between the cold water consumer and the refrigeration system. It is made to cool the cold water, and as a large-capacity facility, it can be installed in a large-scale building.

The chiller is a large-capacity facility, and the maintenance and repair costs are high. In general, unnecessary maintenance costs may occur by performing the maintenance of the chiller at a set period regardless of the state of the chiller. In addition, if a failure occurs in the chiller, not only the repair cost is high, but also additional losses may occur due to the inability to operate the chiller.

Accordingly, there is a need for a method capable of effectively monitoring and managing the chiller.

In addition, when monitoring the chiller remotely, it is important to accurately identify the cause of the anomaly. For example, when a communication abnormality is detected, it should be possible to accurately determine whether an abnormality has occurred in a communication device or a communication network, or whether a failure has occurred in the chiller product itself.

An object of the present invention is to provide a chiller network system capable of effectively monitoring and managing a chiller and a control method thereof.

An object of the present invention is to provide a chiller network system capable of accurately determining and responding to an abnormal cause and a control method thereof.

It is an object of the present invention to provide a chiller network system and a control method thereof that can be applied to indoor and outdoor environments without additional network environment configuration.

An object of the present invention is to provide a chiller system capable of effectively transmitting and managing chiller-related data and a control method thereof.

The object of the present invention is not limited to the above-mentioned object, and other objects and advantages of the present invention not mentioned can be understood by the detailed description according to the embodiment of the present invention.

In order to achieve the above or other object, a chiller network system and a control method thereof according to an aspect of the present invention receive operation information of the chiller through wired communication and transmit data based on the operation information of the chiller through wireless communication The modules can be used to effectively monitor and manage multiple chillers remotely.

In order to achieve the above or other object, a chiller network system according to an aspect of the present invention includes a plurality of chillers, each of which is connected to the chillers, receives operation information from the connected chillers, and operates the connected chillers through wireless communication a plurality of communication modules for transmitting driving data based on information, and a server for receiving the driving data from the communication modules, wherein the server is configured to: It is possible to determine whether an error has occurred and whether a communication error has occurred.

The communication modules each check whether the connected chiller is in operation, and if the connected chiller is in operation, transmit operation data of the connected chiller to the server every first cycle, and if the connected chiller is not in operation , the operation data of the connected chiller may be transmitted to the server every second period longer than the first period.

In addition, when the driving data is received in the first cycle, the server may determine a normal driving state, and when the driving data is received every second cycle, the server may determine that the driving data is in a normal stop state.

Also, if the driving data is not received during a third period longer than the second period, the server may determine whether the driving data is normally stopped by checking the most recently received driving data.

In addition, if the server does not normally stop by checking the most recently received driving data, and the most recently received driving data includes a communication error message, it may be determined as a communication error.

In addition, if the server does not normally stop by checking the most recently received driving data, and the most recently received driving data does not include a communication error message, it can be determined that the connected chiller has failed. .

Also, if the operation data is not received during a third period longer than the second period, the server may check the number of chillers installed at the same site.

In addition, if there is one chiller installed at the same site, the server may determine whether to stop normally by checking the most recently received operation data.

In addition, if there are a plurality of chillers installed in the same site, the server checks the number of chillers in operation, and if one or more chillers are in operation, determines a normal stop, and if there is no chiller in operation, the most recently received It is possible to determine whether there is a communication error by checking the operation data.

The communication modules and the server may perform wireless communication based on LTE Cat.M1.

The communication modules may collect and compress operation information of the connected chiller based on an operation cycle of the chiller, and transmit the compressed data to the server.

In addition, the communication modules store sensing data acquired from a plurality of sensors, acquisition timing information of the sensing data, and device information of the connected chiller as one driving cycle information in an internal memory, and store the driving cycle information in N pieces It can be bundled and compressed and transmitted to the server.

The communication modules may transmit model information of the chiller, identification information of the communication module, and timing information together with the operation data of the chiller to the server.

In order to achieve the above or other object, the chiller network system according to an aspect of the present invention requests a predetermined service to the server, and displays a user interface screen including status information of the chillers based on data received from the server at all times. It may further include a monitoring terminal to provide.

Also, the server may transmit a notification message to the monitoring terminal when an abnormal state of one or more chillers among the chillers is detected.

The operation data of the chillers may include operation information of the chillers and sensing data obtained from a plurality of sensors provided in the chillers or sensing states of the chillers.

The driving data of the chillers may include sensing data obtained from a plurality of IoT sensors that sense at least one of status information of the chillers and status information of an environment in which the chillers are disposed.

In addition, the communication modules may receive sensing data from the plurality of IoT sensors through wireless communication.

According to at least one of the embodiments of the present invention, it is possible to effectively monitor and manage the chiller.

In addition, according to at least one of the embodiments of the present invention, it is possible to accurately determine and respond to the cause of the abnormality.

In addition, according to at least one of the embodiments of the present invention, it is possible to provide a chiller network system and a control method thereof applicable to indoor and outdoor environments without additional network environment configuration.

In addition, according to at least one of the embodiments of the present invention, it is possible to effectively transmit and manage chiller-related data.

1 is a diagram illustrating the configuration of a chiller network system according to an embodiment of the present invention.
2 is a simplified internal block diagram of a communication module according to an embodiment of the present invention.
3 is a simplified internal block diagram of a server according to an embodiment of the present invention.
4 is a diagram illustrating a configuration of a chiller network system according to an embodiment of the present invention.
5 is a flowchart illustrating a method of operating a chiller network system according to an embodiment of the present invention.
6A and 6B are diagrams illustrating a user interface screen of a chiller network system according to an embodiment of the present invention.
7 is a flowchart illustrating a method of operating a chiller network system according to an embodiment of the present invention.
8 to 14 are diagrams referenced in the description of a method of operating a chiller network system according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it goes without saying that the present invention is not limited to these embodiments and may be modified in various forms.

In the drawings, in order to clearly and briefly describe the present invention, the illustration of parts irrelevant to the description is omitted, and the same reference numerals are used for the same or extremely similar parts throughout the specification.

On the other hand, the suffixes "module" and "part" for the components used in the following description are given simply in consideration of the ease of writing the present specification, and do not give a particularly important meaning or role by themselves. Accordingly, the terms “module” and “unit” may be used interchangeably.

Also, in this specification, terms such as first and second may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.

1 is a diagram illustrating the configuration of a chiller network system according to an embodiment of the present invention.

Referring to FIG. 1 , a chiller network system according to an embodiment of the present invention may include one or more chiller systems 10 and a server 30 . Preferably, the chiller network system according to an embodiment of the present invention may include a plurality of chiller systems 10 and a server 30 capable of managing and controlling the plurality of chiller systems 10 .

The chiller system 10 may include a chiller 11 , and a communication module 12 connected to the chiller 11 to communicate with the server 30 , respectively. More preferably, the communication module 12 may be an Internet of Things platform 12 capable of communicating with Internet of Things (IoT) sensors. Also, the communication module 12 may be a data transmission/reception device that transmits and receives data according to a commercial communication standard such as LTE. In addition, the IoT platform 12 may also support commercial communication standards such as LTE. Hereinafter, embodiments will be described focusing on an embodiment of communication using the IoT platform 12 .

The chiller 11 may include an air conditioning unit in which a refrigeration cycle is formed, a cooling tower supplying cooling water to the air conditioning unit, and a cold water demander through which cold water exchanged with the air conditioning unit circulates.

The cold water demander corresponds to a device or space that performs air conditioning using cold water. For example, the cold water demander is an Air Handling Unit (AHU) that mixes indoor air and outdoor air and heat-exchanges the mixed air with cold water to introduce it into the room. At least one of a fan coil unit (FCU, Fan Coil Unit) for discharging to the furnace and a floor pipe unit buried in the floor of the room may be included.

The main configuration of the air conditioning unit may include a compressor for compressing the refrigerant, a condenser into which the high-temperature and high-pressure refrigerant compressed in the compressor flows, an expander for decompressing the refrigerant condensed in the condenser, and an evaporator for evaporating the refrigerant decompressed in the expander. have.

The compressor is a device for compressing gas such as air or refrigerant gas, and is formed to compress the refrigerant and provide it to the condenser. The compressor may include an impeller for compressing the refrigerant, a rotation shaft connected to the impeller, and a motor for rotating the rotation shaft.

The condenser is formed to cool the refrigerant by exchanging heat with cooling water with high temperature and high pressure refrigerant discharged from the compressor and passing through the condenser.

The expander sends the liquid refrigerant to the evaporator, and the refrigerant of high pressure is formed to change to low temperature and low pressure while passing through the expansion valve.

The evaporator is formed to cool the cold water while the refrigerant evaporates.

The chiller 11 may include a plurality of sensors for sensing the temperature and pressure of the refrigerant. For example, a plurality of sensors may be disposed on an input side and an output side of a main configuration of the air conditioning unit to sense temperature, pressure, and the like. In addition, the chiller 11 may further include other types of sensors. For example, the chiller 11 may include a vibration sensor, a humidity sensor, and the like.

In addition, the chiller 11 and an IoT sensor may be disposed in the space in which the chiller 11 is disposed to sense data related to the state of the chiller 11 . Also, the IoT sensor may transmit the sensed data to the chiller 11 and/or the IoT platform 12 . For example, the IoT sensor may sense the temperature and humidity of the space in which the chiller 11 is disposed, and transmit it to the chiller 11 and/or the IoT platform 12 .

The chiller system 10 may access the Internet through the IoT platform 12 and the network 20 , and may transmit/receive data to and from the server 30 . For example, the IoT platform 12 transmits sensing data related to the chiller 11 obtained through a plurality of sensors to the server 30 , and transmits data received from the server 30 to the chiller 11 . can

The server 30 may be a server operated by a manufacturer of the chiller 11 or a company entrusted with a service by the manufacturer, or may be a kind of cloud server.

The server 30 may remotely monitor the states of the plurality of chillers 11 and control the operation by determining abnormalities.

The plurality of chiller systems 10 and the server 30 may be provided with a communication means (not shown) supporting one or more communication standards to communicate with each other. In addition, the plurality of chiller systems 10 and the server 30 may communicate with a PC, a monitoring terminal 40 including a mobile terminal, and other external servers.

A user such as an administrator or a customer can check information about the chiller 11 in the chiller network system through the monitoring terminal 40 such as a PC or a mobile terminal.

The server 30 is implemented as a cloud server, and the cloud server 30 is interlocked with the chiller 11 to monitor and control the chiller 11 and provide various solutions remotely.

Meanwhile, the server 30 may be configured by distributing information and functions to a plurality of servers, or may be configured as a single integrated server.

On the other hand, the server 30 may provide information about the control and current state of the chiller 11 to the monitoring terminal 40 , and it is possible to create and distribute an application for controlling and monitoring the state of the chiller 11 . do.

Such an application may be an application for a PC or an application for a smartphone applied as the monitoring terminal 40 .

The server 30 may be connected to the plurality of chiller systems 10 to monitor and control the operation thereof. In this case, the server 30 may perform operation setting, lock setting, schedule control, group control, and abnormality check for the plurality of chillers 11 .

In particular, the server 30 may receive data from the plurality of chiller systems 10 through wireless communication, analyze it, and check whether an abnormality occurs in each chiller 11 .

Meanwhile, the server 30 may authenticate the IoT platform 11 and the user's terminal 40 , and perform data transmission/reception and integrity verification on the transmitted/received data packets.

The server 30 may receive data based on the driving information of the chiller 11 from the IoT platform 11 .

The IoT platform 12 may receive the driving information of the chiller 11 through wired communication and transmit data based on the driving information of the chiller 11 to the server 30 through wireless communication.

The chiller 11 and the IoT platform 12 may transmit/receive data through wired serial communication such as RS232. The chiller 11 may transmit information on an operation to be performed, sensing data acquired by sensors and/or IoT sensors, etc. to the IoT platform 12 connected through wired serial communication such as RS232.

In addition, the IoT platform 12 may communicate with an external device such as the server 30 using a wireless communication network. The IoT platform 12 may transmit data based on the driving information of the chiller 11 to the server 30 through wireless communication. The IoT platform 12 may transmit data received from the chiller 11 and/or IoT sensors to the server 30 , or process the received data and transmit it to the server 30 . .

More preferably, the IoT platform 12 may use a wireless communication network of LTE category (Cat.).M1. For example, the IoT platform 12 and the server 30 may perform wireless communication based on LTE Cat.M1.

LTE Cat.M1 is a technology standardized by the international standardization organization 3GPP. It is a network that is more advanced in battery life and data transmission efficiency than the existing large-capacity network technologies such as LTE and LTE-M. The frequency band is LTE, and the transmission speed is upload The standard is 200 Kbps or less, the bandwidth is 1.4 MHz, and the maximum output is 20 dBM.

Although the transmission speed of LTE-M is fast, the power efficiency is low, so LTE Cat. M1 is more effective in transmitting sensor information in terms of power consumption efficiency. In addition, since the LoRa transmission speed is slow and only a small amount of data can be transmitted, it is insufficient to collect and transmit sensor data in units of driving cycles.

Since the chiller network system according to an embodiment of the present invention uses cycle information in a data unit that integrates a plurality of sensor information, not single sensor information, it may be effective to use the LTE Cat.M1 standard.

According to an embodiment of the present invention, the IoT platform 12 is used as a method for data transmission in an environment where it is difficult to install an existing network. The IoT platform 12 communicates with the chiller 11 through wired communication and communicates with other devices through wireless communication, so that online data transmission is possible in various environments.

2 is a simplified internal block diagram of an IoT platform according to an embodiment of the present invention.

The IoT platform 12 is a device capable of receiving data from a terminal device such as the chiller 11 and transmitting it to an external device.

Referring to FIG. 2 , the IoT platform 12 may include a processor 110 , a wired communication module 120 , a wireless communication module 130 , and an internal memory 140 .

The processor 110 may control the overall operation of the IoT platform 12 . The processor 110 processes data received through the wired communication module 120 and the wireless communication module 130 , and transmits data to a designated device through the wired communication module 120 and the wireless communication module 130 . can be controlled

In addition, the processor 110 may process data according to a predetermined standard. For example, the processor 110 may improve transmission efficiency by generating integrated data by integrating a plurality of data, and compressing one or more of the generated combined data by combining the data.

The wired communication module 120 may be provided to communicate with other devices through a wired communication method. For example, the wired communication module 120 may be connected to the chiller 11 by wire, and the IoT platform 12 and the chiller 11 may transmit/receive data through wired serial communication such as RS232. .

The wireless communication module 130 may be provided to communicate with other devices in a wireless communication method. For example, the wireless communication module 130 may communicate with external devices such as the IoT sensor and the server 30 through a wireless network according to a wireless communication standard such as LTE category (Cat.).M1.

The chiller 11 communicates with the connected IoT platform 12 by wire, and the IoT platform 12 wirelessly communicates with an external device to transmit data by minimizing restrictions on indoor and outdoor spaces.

The internal memory 230 may store information received from the chiller 11 , the IoT sensor, the server 30 , and the like.

The internal memory 230 may store data necessary for the operation of the IoT platform 12 .

In order to collect product data such as the chiller 11 in real time, a stable network environment is required. If such a stable environment is not established, data acquisition and product control are impossible. However, in reality, there are many problems in constructing an additional environment in a space where there is no network environment. Therefore, as an alternative for data collection in a space without a network environment, the Internet of Things system 12 can be implemented by utilizing the currently most widely installed wireless communication network.

On the other hand, the IoT platform 12 is a device for transmitting data to the server 30 and may serve as a gateway connecting a device to a nearby wireless communication base station. The IoT platform 12 stores data in the internal memory 140 to cope with a temporary communication failure. In some cases, the IoT platform 12 may separately include a data buffer for temporarily storing data to be transmitted or may be provided in the internal memory 140 .

According to an embodiment of the present invention, indoor and outdoor applications are possible without additional network environment configuration, and various information can be received and utilized from a base station of an existing communication network.

The IoT platform 12 may detect the chiller 11 information data and transmit unique device identification information. In addition, the IoT platform 12 may check the wireless network status and perform data transmission accordingly. For example, in a communication enabled state, the IoT platform 12 may request data from the chiller 11 or the like, and may receive a control service request from the server 30 .

In order to build a real-time service, the IoT platform 12 may integrate the sensing information obtained from the sensors into one data, and, together with the sensing information data received from the chiller 11 , collect unique device identification information. It can be transmitted to the server 30 .

Preferably, the IoT platform 12 may collect and compress the driving information of the chiller 11 based on the driving cycle of the chiller, and transmit the compressed data to the server 30 .

The IoT platform 12 may compress and transmit operation information of the chiller 11 in consideration of power efficiency and data transmission size.

The IoT platform 12 may classify the sensing data based on the driving information in the internal memory 140 and store it as a database. For example, the IoT platform 12 may integrate and store sensing data collected for each driving cycle unit in the internal memory 140 , compress it, and then transmit it to the server 30 .

Preferably, the IoT platform 12 may determine whether the chiller 11 is in operation and adjust the data transmission period.

When receiving a control service request from the server 30 , the IoT platform 12 checks whether the chiller 11 is operating, and if the chiller 11 is in operation, the chiller 11 is in operation every first cycle. If the operation information of (11) is transmitted to the server 30 and the chiller 11 is not in operation, the operation information of the chiller 11 is transmitted to the server 30 every second period longer than the first period. ) can be sent. Accordingly, unnecessary data transmission can be minimized, and data transmission efficiency and power consumption efficiency can be improved.

The IoT platform 12 stores sensing data acquired from a plurality of sensors, acquisition timing information of the sensing data, and device information of the chiller 11 as one operation cycle information in the internal memory 140, N pieces of the driving cycle information may be bundled and compressed and transmitted to the server 30 .

Meanwhile, the driving information may include sensing data acquired from a plurality of sensors, acquisition timing information of the sensing data, and device information of the chiller 11 .

In some cases, the operation information of the chiller 11 includes operation information of the chiller 11 and sensing data obtained from a plurality of sensors provided in the chiller 11 or sensing the state of the chiller 11 . may include

The IoT platform 12 may store and transmit data including at least one of chiller 11 control information, ID, time, site, and date information.

For example, the IoT platform 12 stores a plurality of sensor information, timing information, and device information for driving information of the chiller 11 as one driving cycle, and determines a total of 5 cycles as one data and compresses it. After that, you can send

According to an embodiment, the driving information of the chiller 11 is obtained from a plurality of IoT sensors that sense at least one of state information of the chiller 11 and state information of an environment in which the chiller 11 is disposed. It may include sensing data.

According to an embodiment, the IoT platform 12 may receive sensing data from the plurality of IoT sensors through wireless communication.

According to an embodiment, the chiller 11 receives sensing data from the plurality of IoT sensors through wireless communication, and transmits the sensed data of the plurality of IoT sensors through wired communication to the IoT platform 12 . ) can be sent. In this case, the chiller 11 receives the sensing data from the plurality of IoT sensors through wireless communication, and the sensing data obtained from the plurality of sensors including the received sensing data of the plurality of IoT sensors. By merging with , the sensed data merged through wired communication may be transmitted to the IoT platform 12 .

The server 30 may be connected through a network network to receive operation data of the chiller 11 from the IoT platform 12 , and determine the state of the chiller 11 based on the operation data. Here, the driving data may include all data related to the chiller 11 such as setting data and attribute data as well as pure driving data.

3 is a simplified internal block diagram of a server according to an embodiment of the present invention.

Referring to FIG. 3 , the server 30 may include a processor 210 , a communication unit 220 , and a memory 230 .

The processor 210 may control the overall operation of the server 30 .

According to an embodiment, the processor 210 may be equipped with artificial neural networks (ANNs) previously learned by machine learning to perform abnormality diagnosis of the chiller 11 . For example, the processor 210 performs a deep neural network (DNN) such as a convolutional neural network (CNN), a recurrent neural network (RNN), and a deep belief network (DBN) trained by deep learning. may include

Meanwhile, the server 30 may be a server operated by the chiller 11 manufacturer or a server operated by a service provider, or a kind of cloud server.

The communication unit 220 may receive various data such as status information, operation information, and operation information from the chiller 11 , the IoT platform 12 , a gateway, and other electronic devices.

In addition, the communication unit 220 may transmit data corresponding to the received various information to the chiller 11 , the Internet of Things platform 12 , a gateway, other electronic devices, and the like.

To this end, the communication unit 220 may include one or more communication modules such as an Internet module and a mobile communication module.

The memory 230 may store received information and include data for generating result information corresponding thereto.

In addition, the memory 230 may store data used for machine learning, result data, and the like.

The memory 230 may store data necessary for the operation of the server 30 .

For example, the memory 230 may store a learning algorithm to be performed by the server 30 .

The processor 210, a deep learning technology, which is a type of machine learning, may perform learning by going down to a deep level in multiple stages based on data.

Deep learning may refer to a set of machine learning algorithms that extract core data from a plurality of data while sequentially passing through hidden layers.

The deep learning structure may be composed of a deep neural network (DNN) such as CNN, RNN, and DBN.

A deep neural network (DNN) may include an input layer, a hidden layer, and an output layer.

On the other hand, having multiple hidden layers may be referred to as a deep neural network (DNN).

Each layer includes a plurality of nodes, and each layer is associated with the next layer. Nodes may be connected to each other with weights.

An output from an arbitrary node belonging to the first hidden layer (Hidden Layer 1) becomes an input of at least one node belonging to the second hidden layer (Hidden Layer 2). In this case, the input of each node may be a value to which a weight is applied to the output of the node of the previous layer. A weight may mean a connection strength between nodes. The deep learning process can also be viewed as a process to find an appropriate weight.

On the other hand, learning of the artificial neural network can be accomplished by adjusting the weight of the connection line between nodes (and adjusting the bias value if necessary) so that a desired output is obtained for a given input. In addition, the artificial neural network may continuously update a weight value by learning.

The server 30 may process the data received from the IoT platform 12 so that it can be accessed by a user by arranging and converting the data into a database (DB).

When the IoT platform 12 stores various data related to the connected chiller 11 in the internal memory 140 and transmits the data to the base station, the transmitted data is signal-processed by the server 30 .

The IoT platform 12 and/or the server 30 classifies data including control information of the chiller 11 and Id, Time, Site, Date information, etc. by date and time, and classified data can be combined by date. In addition, the integrated data can be converted into a database.

The IoT platform 12 and/or the server 30 performs integrity verification (operation cycle of the chiller 11) on the data, and when there is no abnormality in the stored data, compression and/or database formation process can be performed.

The server 30 may classify the received data by device and date and store it in the database.

The server 30 transmits state information of the chiller 11 and operation information corresponding to the control to the monitoring terminal 40 . In addition, when an abnormal state of the chiller 11 is detected, the server 30 may transmit a notification message to the monitoring terminal 40 .

The monitoring terminal 40 may be a mobile terminal such as a smart phone, Personal Digital Assistants (PDA), or the like, and may be a terminal device capable of Internet access such as a laptop computer or a PC.

The monitoring terminal 40 may request a predetermined service to the server 30 and provide a user interface screen including status information of the chiller 11 based on data received from the server 30 at all times. have.

The monitoring terminal 40 may provide visualization of the data of the server 30 DB so that the user can use it.

The user can check the chiller 11 related data in real time by using the monitoring terminal 40 .

The chiller network system according to an embodiment of the present invention may further include a repeater 50 that receives data transmitted from the IoT platform 12 and retransmits it to the server 30 .

4 is a diagram illustrating a configuration of a chiller network system according to an embodiment of the present invention. FIG. 4 shows an embodiment in which the chiller network system described with reference to FIGS. 1 to 3 further includes a repeater 50. Hereinafter, the repeater 50, which is a difference between the embodiments, will be mainly described.

4, the chiller network system according to an embodiment of the present invention, a plurality of chiller systems (10a, 10b, ... 10n), a plurality of repeaters (50a, 50b, ... 50n), a server ( 30), and a monitoring terminal 50 . The plurality of chiller systems 10a, 10b, ... 10n may include a chiller 11 and an IoT platform 12, respectively. For example, the first chiller system 10a may include a first chiller 11a and a first IoT platform 12a. Meanwhile, it is also possible that the first chiller system 10a includes a plurality of chillers.

4 illustrates a case in which the number of the plurality of chiller systems 10a, 10b, ... 10n and the plurality of repeaters 50a, 50b, ... 50n is the same, but one repeater corresponds to a plurality of chiller systems It is also possible to

The driving information of the chiller 11 is converted into a wireless signal in the IoT platform 12 and transmitted to the repeater 50 .

On the other hand, the IoT platform 12 checks whether communication with the communication repeater 50 is possible in indoor and outdoor spaces, receives data corresponding to a service request from the repeater 50, and internal memory 140 and / Alternatively, the data stored in the data buffer may be transmitted to the repeater 50 .

The repeater 50 may transmit data to the chiller 11 connected to at least one IoT platform 12 within a communication range. Each IoT platform 12 has its own identification information (ID), and the IoT platform 12 can be distinguished based on the ID.

When the repeater 50 receives the service request from the server 30 , the repeater 50 may check the corresponding IoT platform 12 and request data.

The compressed data is transmitted from the repeater 50 to the server 30, and the server 30 may perform data processing.

The repeater 50 serves to receive the data of the chiller 11 from the IoT platform 12 and transfer it to the server 30 , and may play an important role in forming a network. Communication performance is determined based on the location and accessibility of the repeater 50, and if there are many errors in the communication signal, additional installation of a signal amplifier (antenna) or repeater 50 is required.

The repeater 50 and the chiller 11 may exchange data using the IoT platform 12 , and it is also possible to infer the location of the chiller 11 based on the repeater 50 .

On the other hand, the IoT platform 12 checks the network status up to the repeater 50 and checks whether the chiller 11 operates when the network status is normal. The operation information of the chiller 11 stored in the internal memory 140 may be transmitted after the network state becomes normal.

5 is a flowchart illustrating a method of operating a chiller network system according to an embodiment of the present invention.

Referring to FIG. 5 , the IoT platform 12 checks whether a wireless communication network up to the repeater 50 or the server 30 is possible ( S510 ), and proceeds to the next operation.

The IoT platform 12 may store data as much as the capacity of the internal memory 140 in a situation where communication is impossible, and transmit the data at once when communication becomes possible in the future.

If the network is normal ( S510 ), it can be checked whether the chiller 11 is operating ( S520 ), and a data transmission cycle is divided into first and second cycles according to whether the chiller 11 is operating or not. For example, the transmission period during operation may be set to 1 minute, and the transmission period when stopped may be set to 10 minutes. Accordingly, when the chiller 11 is operating (S530), data is transmitted to the server 30 every first period (one minute) (S551). When the chiller 11 is stopped (S530), data is transmitted to the server 30 every second period (10 minutes) (S552).

Data may be transmitted to the server 30 after the primary storage (S541, S542) in the data buffer of the IoT platform 12 (S551, S552). The data buffer is a storage for temporarily storing data for transmission. If there is a repeater 50, data is transmitted to the repeater 50 after primary storage (S541, S542) in the data buffer of the IoT platform 12, and transmitted from the repeater 50 to the server 30 (S551) , S552).

In addition, the IoT platform 12 may compress the driving information of the chiller 11 such as sensing data in units of driving cycles at every first cycle, and then transmit the compressed data to the server 30 . There is (S551, S552).

Meanwhile, the server 30 may determine whether the received data is normal ( S560 ).

6A and 6B are diagrams illustrating a user interface screen of a chiller network system according to an embodiment of the present invention.

6A is an integrated monitoring screen 600 for monitoring a plurality of chiller systems 10 installed at various sites. The integrated monitoring screen 600 may be provided through the monitoring terminal 40 . The user may monitor the status of the plurality of chiller systems 10 installed at various sites by using the integrated monitoring screen 600 .

Information of the chillers 11 is collected through the IoT platforms 12 included in each of the plurality of chiller systems 10 installed at various sites, and the integrated monitoring screen 600 intuitively displays the collected information. can

6A, the integrated monitoring screen 600 is an installation status item 610 including the number of installed chillers 11, status information, and installed area information, a chiller in normal operation among all chillers 11 ( 11), including a current operation rate item 620, a maintenance/repair item 630 displaying the chillers 11 under maintenance/repair among all chillers 11, and a status information item 640 by category such as region can do.

The user may determine whether to operate/stop the chiller installed in each region on the integrated monitoring screen 600 of a web-page capable of performing remote monitoring.

The user may review the maintenance or repair items including the operation/stop of the chillers 11 by viewing the integrated monitoring screen 600 .

6B is a field monitoring screen 650 for monitoring a plurality of chiller systems 10 installed at a specific site. The on-site monitoring screen 650 may also be provided through the monitoring terminal 40 . The user may monitor the status of the plurality of chiller systems 10 installed at a specific site by using the site monitoring screen 650 .

Referring to FIG. 6B , selection menu item information 651 for selecting a specific site and a chiller at a specific site, an alarm message item 652 in which a warning message such as whether the selected site/chiller is abnormal, etc. is displayed, site status information and general information It may include an opinion item 653 and a detailed item 654 in which detailed items for the entire selected site/chiller and each part can be checked.

The monitoring terminal 40 may output operation information and error codes of the chillers 11 on the monitoring screens 600 and 650 .

FIG. 6B illustrates a case in which information of the A-1 chiller 11 is not received and is displayed in a stopped state in the alarm message item 652 of the A-1 chiller 11 . Since no warning message was also received from the A-1 chiller 11, the warning message is displayed as None.

From the point of view of the actual user, it is impossible to determine whether the chiller 11 is normally stopped, whether the chiller 11 is malfunctioning, or whether there is an abnormality in communication equipment or communication network while looking at the monitoring screens 600 and 650, providing smooth maintenance service. it becomes difficult to do

In the case of communication error, it is not a malfunction of the chiller 11 product, but since data reception is not possible, it can be added to the maintenance item. Although there is no abnormality in the actual chiller 11 product, even when the chiller 11 product information does not come in due to an event such as an IoT platform 12 abnormality or USIM expiration, it may be displayed as an abnormal state.

Unlike general communication error detection, chiller products install multiple products at one site, and products that are not actually used for electrical safety reasons turn off the power. The server (administrator) needs a way to distinguish between data non-receipt caused by power cut off and non-received data caused by a communication error.

A chiller network system according to an embodiment of the present invention includes a plurality of chillers 11, each of which is connected to the chillers 11, receives operation information from the connected chillers 11, and wirelessly communicates the connected chillers. A plurality of communication modules 12 for transmitting driving data based on the driving information of (11), and a server 30 for receiving the driving data from the communication modules 12 may be included.

The server 30 may determine whether an abnormality occurs in the chillers 11 and whether a communication abnormality occurs based on the reception period of the driving data.

In addition, the monitoring terminal 40 receives the determination result from the server 30, and on the monitoring screens 600 and 650 to check the operation/stop/communication abnormality of the product, a communication abnormality flag, a product abnormality flag, etc. can be printed out.

In air conditioning/industrial sites, a chiller can be installed as a single product, but in most sites, several chillers are installed in case the chiller breaks down. Unlike general air-conditioning systems, chiller products are powered with high voltage (380 ~ 11,000 V), so the power to products except for those that operate all the time is cut off. In this case, it is impossible to determine whether the turbochiller is normally stopped or is malfunctioning.

According to an embodiment of the present invention, in order to perform a remote maintenance service of a chiller installed at an industrial site and an air conditioning site, based on the reception period of the operation data, it is determined whether the product is operated or stopped, and the product is abnormal. It is possible to classify whether it is a stop caused by an error or a stop caused by an error in communication equipment.

According to an embodiment of the present invention, when the chiller product is stopped, it is not classified as a simple operation stop state, but a situation in which communication is not received may also be considered. Accordingly, it is possible to determine the state of the chiller 11 that appears to be stopped on the monitoring screen and whether there is a failure, and the soundness of the communication state can also be managed as one indicator.

According to an embodiment of the present invention, driving data is transmitted and received every predetermined time. The number of chillers installed at each site can be checked through monitoring screens such as web pages, but since there are many sites, it is difficult to understand the status of each chiller installation. There are many things that the administrator must deal with, such as a stop due to a malfunction of the chiller (11) product, a stop due to non-operation, and a phenomenon caused by a vibration device and communication network abnormality. In order to solve this problem, in the embodiments of the present invention, it is determined whether a normal stop, a stop caused by an abnormality in the product, or an abnormality in the communication module by using a transmission/reception period according to the situation of the driving data.

Hereinafter, a method of determining the state of the chiller 11 based on the reception period of operation data will be described in detail with reference to the drawings.

7 is a flowchart illustrating a method of operating a chiller network system according to an embodiment of the present invention, and FIGS. 8 to 14 are diagrams referenced in the description of an operation method of a chiller network system according to an embodiment of the present invention. to be.

Referring to FIG. 7 , in order to acquire the chiller operation/stop data of the industrial/air conditioning site, a communication module such as an IoT platform 12 is installed, and the chiller 11 and the server 30 are installed through the IoT platform 12 . ) may be communication-connected (S710).

In consideration of several models of the chiller 11 product, protocol information to be received for each model and a unique model number stipulated for each product may be set, and driving information may be transmitted through the IoT platform 12 .

8 shows an example of setting a communication protocol protocol for data transmitted by the IoT platform 12 .

Referring to FIG. 8 , data transmitted by the IoT platform 12 includes model information such as a model name 810 and a model number 820 of the chiller 11 , timing information 830 , and driving data 840 . ) may be included.

The data transmitted by the IoT platform 12 is for the maintenance/repair service of the chiller 11 , and may select a major factor for each model and transmit data on the selected major factor. The location or information of the data protocol for each chiller product family is very important, and when each model can be effectively distinguished, it can have value as data. In particular, since the IoT platform 12 transmits data by being connected to multiple product models and numerous products, in a situation where a large amount of work from multiple products and consistent data reception are required, it is necessary to set protocol rules to classify and restore data. It can solve the difficulties of the work itself. Through this, after classifying by model of each product group, it is set so that the administrator can receive necessary protocol information, and it helps to quickly and accurately restore data received using a program in the server 30 at regular intervals.

Accordingly, it includes model information such as the model name 810 and the model number 820 of the chiller 11 , and driving data 840 and driving data 840 corresponding to major factors selected according to the model of the chiller 11 . may include timing information 830 on the generation or acquisition time of .

In addition, when transmitting the operation information of the chiller, the data protocol may be designed so that the identification number stipulated for each model can be written in the file name of the sending data. For example, the file name may be set as “chiller operation site name_model protocol number_reception time”.

On the other hand, when the IoT platform 12 transmits data using commercial LTE, the IoT platform 12 IMEI (Product Identification Number) information is provided to the telecommunication company in advance, and each IoT platform 12 is When transmitting data, IMEI information may be transmitted.

In order for the chiller system 10 to transmit data using a communication module such as the IoT platform 12, the IMEI is shared with a communication company to prepare for data transmission.

The model rules and protocol information of the chiller 11 are programmed with information promised to the communication module such as the IoT platform 12, and installed field information and received time can be written to distinguish the same models.

In the process of receiving data, as important as setting data protocol rules, it is necessary to know which field information the received data has. According to the present invention, data can be received from the server 30 by creating a rule with the IMEI information, the chiller model number, and the currently received date.

In addition, it is preferable that a protocol for acquiring communication abnormality, stop, and driving information is added to the driving data.

9 shows the upload message format of the IoT platform 12 .

The IoT platform 12 may transmit the upload message format while transmitting the driving data. Alternatively, the Internet of Things platform 12 may transmit the upload message format at every predetermined period during communication connection.

Referring to FIG. 9 , the upload message includes phone number information 910 specified in the IoT platform 12 , a serial number 920 of the IoT platform 12 , alarm information 930 , a power state 940 , A parity check 950 may be included.

The phone number information 910 and the serial number 920 are identification information of the IoT platform 12, and the alarm information 930 is normal when the digital input (DI) state is low, and the digital input ( If the DI) state is high, an abnormal alarm may be indicated.

The power state 940 indicates a power-related state of the IoT platform 12, such as battery discharge, normal state, DC input use, etc., and the parity check 950 is data for inspection that can confirm whether received data is normally received. to be.

In the upload message, data 920 , 930 , and 940 other than the identification information 910 and the parity check 950 of the IoT platform 12 may have a data structure according to a Type Length Value (TLV) protocol. The TLV protocol is a communication standard that concisely and efficiently expresses complex data with three structured field elements, namely, a type, a length, and a value.

For example, the data may include a type field, a length field, and a value field. In addition, the size of the data value may be variable, and the data length may be changed to express the variable size of the data value.

The type is an identifier for information to be included in the data value, the length is the size of the data value, and the data value is actually transmitted information.

The data value varies according to the type, and event information to be transmitted is transmitted through the data field, and the size of the information to be transmitted is changed and transmitted. The size of information that can be transmitted as a data value varies according to the length. do.

In the server 30, information of each chiller 11 product may be written, and data received from the IoT platform 12 may be analyzed to determine whether the chiller 11 is being operated.

If the chiller 11 product fails, a long repair period of several days to several weeks is required, so it is possible to check whether the communication is faulty or malfunctioning in situations where there are many cases in which a chiller is available as a spare even at the same site. In particular, it is possible to analyze whether a phenomenon that occurs due to a power cut off of the product, a phenomenon that occurs due to a problem in the IoT platform 12 receiver, or a phenomenon that occurs due to a malfunction of the product.

As described with reference to FIG. 5 , the IoT platforms 12 each check whether the connected chiller 11 is operating, and if the connected chiller 11 is in operation, the connected chiller 11 is in operation every first cycle. If the operation data of (11) is transmitted to the server 30 and the connected chiller 11 is not in operation, the operation data of the connected chiller 11 is transmitted to the server every second period longer than the first period It can be transmitted to (30) (S720, S730).

The server 30 may check whether or not data has been transmitted from the IoT platform 12 every specified period (S720, S730, and S740).

The server 30, when the driving data is received every first cycle (S720), determines a normal driving state (S725), and when the driving data is received every second cycle (S730), a normal stop state It can be determined as (S735).

The IoT platform 12 may transmit the operation data of the chiller 11 in a first cycle (eg, one minute cycle) when the connected chiller 11 is in operation ( S720 ).

The server 30 may generate a normal driving flag when the driving data is received in the first preset period (S720) (S725). Also, when the driving data is received in the first preset period ( S720 ), the server 30 may decode the received driving data and analyze the driving data ( S725 ).

The IoT platform 12 may transmit operation data of the chiller 11 in a second cycle (eg, a 10-minute cycle) when the connected chiller 11 is stopped ( S730 ).

The server 30 may generate a normal stop flag when the driving data is received in the second preset period (S730) (S735). Also, when driving data is received in a second preset period ( S730 ), the server 30 may decode the received driving data and analyze the driving data ( S735 ).

The server 30 may know that the chiller 11 product is currently being operated when data is received every first cycle. Similarly, when the server 30 receives data every second period, it can be confirmed that the power of the chiller 11 product is in a stopped state while being connected.

According to an embodiment of the present invention, when data is not transmitted from the IoT platform 12 , a phenomenon that appears as a failure of the IoT platform 12 , a phenomenon that appears as a communication company problem, or a power-off of the chiller 11 causes the It is possible to determine the reason for the non-transmission of data, such as a phenomenon that has occurred.

If the driving data is not received during a third period longer than the second period (S740), the server 30 may check the most recently received driving data to determine whether the vehicle stops normally (S770). .

For example, if the server 30 does not normally stop by checking the most recently received driving data (S770), and the most recently received driving data includes a communication error message (S780), It can be determined as a communication error (S795).

In addition, if the server 30 does not normally stop by checking the most recently received driving data (S770), and the most recently received driving data does not include a communication error message (S780), the It can be determined as a failure of the connected chiller 11 (S790).

10 illustrates data restored by decompressing and decoding received data.

Referring to FIG. 10 , the received data may include timing information, driving data for a selected main factor, and various messages.

11 exemplifies a response operation message during normal operation, FIG. 12 exemplifies a response operation message during normal stop, and FIG. 13 exemplifies a response operation message when a chiller product communication error occurs.

In the case of using commercial communication, it is necessary to devise a method of reducing data packets as much as possible in terms of cost. Looking at the timing information and messages of FIG. 10 , in order to prevent unnecessary data reception while checking whether the IoT platform 12 has received , the chiller 11 operation data is transmitted in the first cycle (in the example of FIG. 10 , 10 seconds), and in the case of being stopped, data may be received every second period (10 minutes in the example of FIG. 10 ).

Referring to the first section 1100 of FIGS. 10 and 11 , in the case of normal operation, it can be seen that the values of the pressure ratio and the current increase while changing from the stop (operation message, 172) to the initial start (146, 59). .

Referring to the second section 1200 of FIG. 12 , in the normal stop response, the operation 171 shows a motion prescribed as a stop 172 through the pre-stop signal 54 .

Referring to the third section 1300 of FIG. 13 , when the communication of the chiller product is abnormal, an error message 196 is displayed during the normal operation 171 , and the current and pressure ratio is abruptly stopped.

According to an embodiment of the present invention, the chiller 11 can be divided into operation/stop while checking whether the product is in operation (S725, S735), and the product in operation should be checked from various viewpoints.

When the chiller 11 product is abnormal, the chiller 11 sends an error message through the IoT platform 12 and stops the operation of the compressor for safety.

When the chiller 11 product is normally stopped, operation data that is stopped at every first cycle is received to the server 30 ( S720 ). Chiller 11 Due to the characteristics of the product, several chillers are installed at one site, so the product being stopped is generally powered off. When the power is off, the IoT platform 12 cannot transmit data and the server 30 does not receive data that is being stopped. do.

On the other hand, since the IoT platform 12 cannot include the protocol name of each column, data according to the protocol protocol is transmitted, and in the process of restoring in the server 30, the administrator using the protocol information established for each model and data that can be used on the server.

14 exemplifies data when a communication abnormality is suspected. The data information illustrated in FIG. 14 is configured to be transmitted after determining whether to operate/stop the chiller 11 using the operation message of the chiller 11 .

Referring to FIG. 14 , the data includes additional information 1450 such as timing information 1410 , chiller name information 1420 , chiller number 1425 , chiller method information 1430 , area information 1440 , and whether communication abnormality is suspected. ), final data reception information 1460 , final driving state information 1470 , and the like.

In order to check whether the product has communication abnormality, the telecommunication company is sending and receiving a signal that can check whether the product is malfunctioning.

When an error occurs due to a failure of the IoT platform 12 or a problem with the USIM, it is not possible to check whether there is a failure using a signal transmitted from a telecommunication company. For example, the last data of FIG. 14 is a case in which the final operation state is the operation state, but data is not received during the third period, and thus a communication error is suspected. In this way, in the case of a communication error due to a failure of the IoT platform 12 or a problem with the USIM, the manager can contact the site to quickly check whether the product is abnormal.

According to an embodiment of the present invention, the server 30 may check the number of chillers installed in the same site if the driving data is not received during a third period longer than the second period (S740) ( S750).

If there is only one chiller installed at the same site (S750), the server 30 may determine whether the vehicle stops normally by checking the most recently received driving data (S770).

For example, if there is a stop message in the most recently received driving data, the server 30 may determine that it is normally stopped (S770).

In addition, if there is a driving message in the most recently received driving data, the server 30 may determine that it is abnormally stopped (S770).

If the server 30 checks the most recently received driving data and does not normally stop (S770), and the most recently received driving data includes a communication error message (S780), it is determined as a communication error. It can be done (S795).

In addition, if the server 30 does not normally stop by checking the most recently received driving data (S770), and the most recently received driving data does not include a communication error message (S780), the It can be determined as a failure of the chiller 11 (S790).

When a plurality of chillers 11 are installed at the same site, at least some of the plurality of chillers 11 are driven according to a load, and the power of the remaining chillers 11 is turned off to reduce power consumption. Accordingly, when one or more chillers 11 are operating at a site in which a plurality of chillers 11 are installed, at least some chillers 11 may not transmit a signal because the power is off.

Therefore, the server 30, if there are a plurality of chillers 11 installed at the same site (S750), check the number of chillers 11 in operation (S755), and if one or more chillers are in operation, normal stop It can be determined as (S760).

When data is not received during the third period (S740), the server 30 checks the number of chillers installed at the same site (S750). When two or more products are installed (S755), and one or more products are in a normal stop or in operation, even if data is not received, it can be determined as a stop due to power cut off (S760).

If there are a plurality of chillers installed at the same site (S750), the server 30 checks the number of chillers in operation (S755), and if there is no chiller in operation, the most recently received operation data It can be determined whether or not (S770).

If the operation information of all the chillers 11 is not received from the field, the operation data received until recently of the chillers 11 installed in the field are checked ( S770 ). If the recently received operation data is normally stopped but does not operate even after several days have passed, after checking the communication module such as the IoT platform 12, the communication company can check whether the product is received or not to check whether the communication module is operating normally ( S795).

If the recently received operation data does not include a communication error message, the chiller 11 may be regarded as abnormal, and the customer may be contacted and repair work may be performed (S790).

According to an embodiment of the present invention, it is possible to implement a remote maintenance/repair service capable of remotely monitoring and managing the silver chiller system 10 using operation data of each site.

Since the server 30 cannot confirm to the customer every time the operation data of each chiller 11 product is not received for a predetermined time, it is possible to check in advance whether the communication of the product is abnormal before confirming the customer.

The chiller maintenance/repair service according to an embodiment of the present invention does not require additional inspection by management personnel, and it is possible to detect the occurrence of an abnormality in the chiller in advance, thereby preventing damage or damage to the product. In addition, the chiller maintenance/repair service according to an embodiment of the present invention can reduce unnecessary inspection by classifying operation/stop/communication abnormality of a product.

The chiller network system and the method for controlling the same according to the present invention are not limited to the configuration and method of the described embodiments as described above, but are all or part of each embodiment so that various modifications can be made. may be selectively combined.

Meanwhile, the method for controlling a chiller network system according to an embodiment of the present invention can be implemented as a processor-readable code on a processor-readable recording medium. The processor-readable recording medium includes all types of recording devices in which data readable by the processor is stored. In addition, the processor-readable recording medium is distributed in a computer system connected to a network, so that the processor-readable code can be stored and executed in a distributed manner.

In addition, although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims Various modifications may be made by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

Chiller: 11
Internet of Things Platform: 12
Server: 30
Monitoring terminal: 40

Claims (18)

multiple chillers;
a plurality of communication modules connected to each of the chillers, receiving operation information from the connected chiller, and transmitting operation data based on operation information of the connected chiller through wireless communication; and,
Including; a server for receiving the driving data from the communication modules,
The server, based on the reception period of the operation data, the chiller network system, characterized in that it determines whether an abnormality occurs in the chillers and whether a communication abnormality occurs. According to claim 1,
The communication modules are each,
Check whether the connected chiller operates,
When the connected chiller is in operation, the operation data of the connected chiller is transmitted to the server every first period,
If the connected chiller is not in operation, the chiller network system, characterized in that for transmitting the operation data of the connected chiller to the server every second period longer than the first period. 3. The method of claim 2,
The server is
When the driving data is received at every first cycle, it is determined as a normal driving state,
Chiller network system, characterized in that when the operation data is received every second period, it is determined as a normal stop state. 4. The method of claim 3,
The server is
During a third period longer than the second period, if the operation data is not received, the chiller network system, characterized in that it is determined whether the operation data is normally stopped by checking the most recently received operation data. 5. The method of claim 4,
The server is
The chiller network system, characterized in that if the most recently received operation data is not normally stopped and the most recently received operation data includes a communication error message, it is determined as a communication error. 6. The method of claim 5,
The server is
The chiller network system, characterized in that if the most recently received operation data is not normally stopped and the most recently received operation data does not include a communication error message, it is determined as a failure of the connected chiller. 5. The method of claim 4,
The server is
During a third period longer than the second period, the chiller network system, characterized in that the number of chillers installed at the same site is checked. 8. The method of claim 7,
The server is
If there is one chiller installed at the same site, the chiller network system, characterized in that it is determined whether the operation data is normally stopped by checking the most recently received operation data. 8. The method of claim 7,
The server is
If there are a plurality of chillers installed at the same site, check the number of chillers in operation,
If one or more chillers are operating, it is determined as a normal stop,
If there is no chiller in operation, the chiller network system characterized in that it is determined whether there is a communication error by checking the most recently received operation data. According to claim 1,
The communication modules and the server, chiller network system, characterized in that the wireless communication based on LTE Cat.M1. According to claim 1,
The communication modules are
The chiller network system, characterized in that the operation information of the connected chiller is collected and compressed based on the operation cycle of the chiller, and the compressed data is transmitted to the server. 12. The method of claim 11,
The communication modules are
Sensing data acquired from a plurality of sensors, acquisition timing information of the sensing data, and device information of the connected chiller are stored in the internal memory as one operation cycle information, and N pieces of the operation cycle information are bundled and compressed and transmitted to the server Chiller network system, characterized in that. The method of claim 1,
The communication modules are
and transmitting model information of the chiller, identification information of the communication module, and timing information together with the operation data of the chiller to the server. According to claim 1,
and a monitoring terminal that requests a predetermined service from the server and provides a user interface screen including status information of the chillers based on data received from the server at all times. 15. The method of claim 14,
The server, chiller network system, characterized in that for transmitting a notification message to the monitoring terminal when an abnormal state of one or more chillers among the chillers is detected. According to claim 1,
The operation data of the chillers may include operation information of the chillers and sensing data obtained from a plurality of sensors provided in the chillers or sensing states of the chillers. According to claim 1,
The operation data of the chillers includes sensing data obtained from a plurality of IoT sensors that sense at least one of state information of the chillers and state information of an environment in which the chillers are disposed. 18. The method of claim 17,
The communication modules, Chiller network system, characterized in that for receiving the sensing data from the plurality of IoT sensors through wireless communication.

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