KR20120014837A - Chiller System and Data Log Storage Method - Google Patents

Abstract

The present invention relates to a chiller system and a method of storing the data log, and to specify the data to be used for the inspection of the system, and to generate the log data by recording the specified data for a specified time to check and check the state of the chiller from a distance can do.

Description

Chiller system method and logging data}

The present invention relates to a chiller system and a method for storing the datalog, and more particularly, to a chiller system and a method for storing the datalog selectively for storing data at a specified time in storing log data used for checking the state of the system. will be.

Generally, a chiller supplies cold water to a cold water demand destination, and includes a compressor, a condenser, an expansion mechanism, and an evaporator through which a refrigerant is circulated.

The chiller consists of a water refrigerant heat exchanger to exchange heat between the refrigerant and the water, and is connected to the cold water demand and the water pipe to circulate and supply the water cooled by the refrigerant to the cold water demand.

Such a chiller needs to be periodically checked and maintained as a plurality of units are organically connected and operated.

In the case of a conventional chiller system, the state is determined using data stored in the system for maintenance. However, since some data is continuously stored, there is a limit of the storage area of the system, so a lot of data cannot be stored and past records are deleted after a certain time, so there is a limit to use for system check.

SUMMARY OF THE INVENTION An object of the present invention is to provide a chiller system and a method for storing the datalog that designate data to be used for the inspection of the system directly and allow the specified data to be recorded for a specified time so that only the necessary data can be checked to effectively inspect the system. have.

Air conditioner according to the invention a plurality of chillers; A terminal for requesting log data for at least one of the plurality of chillers; And connected with the plurality of chillers to monitor an operation state of the plurality of chillers and to control the operation thereof, and in response to the log data request of the terminal, information on the designated data of a predetermined chiller for a specified time for a specified time; And accumulating and storing the data of the accumulated and stored data as log data and transmitting the result to the terminal.

In addition, the control method of the chiller system includes receiving and analyzing a log data request from a terminal or a server; Starting a log according to a condition included in the log data request and accumulating and storing information on specified data for a specified time; Generating log data when the log is finished; And transmitting the log data to the terminal or the server .

The chiller system and its datalog storage method according to the present invention configured as described above are configured to record and store the designated data for inspection of the chiller system for a specified time, thereby selecting and storing only necessary data in a limited resource, thereby utilizing resource utilization and data. The effect is improved in utilization.

In addition, the chiller system can be inspected using data stored at a remote location, thereby improving convenience of maintenance and management.

1 is a view schematically showing the configuration of a chiller system according to an embodiment of the present invention.
2 is a block diagram showing a control configuration of a controller according to an embodiment of the present invention.
3 is a diagram referred to describe the flow of log data in the chiller system according to an embodiment of the present invention.
4 is an exemplary diagram referred to for describing a method of designating a type and a time of data when storing log data according to an embodiment of the present invention. .
5 is a flowchart referred to for describing a method of storing log data according to a system operation in a chiller system according to the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a view schematically showing the configuration of a chiller system according to an embodiment of the present invention.

As shown in FIG. 1, a chiller system according to an embodiment of the present invention includes a plurality of chillers 11 to 13 and a controller 100. In addition, the chiller system includes a server 200 connected to the controller 100 and a network, and terminals 210 and 220.

The controller 100 not only monitors the operation states of the plurality of chillers 11 to 13, but also controls the operation of each chiller so that the chiller performs a designated operation. In this case, the controller 100 is provided separately to the chiller. (11 to 13) will be described as an example but may be provided inside the chiller (2) in some cases.

In addition, the controller 100 may include its own server function, in which case the terminals 210 and 220 are directly connected to the controller 100 using the server function of the controller 100 at a remote location even if the server 200 is not separately connected. To monitor the status of the chiller.

When the controller 100 does not have a server function, the controller 100 transmits data to the connected server 200 so that data about the chiller is stored in the server 200, and is transmitted to the terminals 210 and 220 through the server 200. Allows service provision for chillers.

The controller 100 records and stores the specific data among the plurality of data of the chillers 11 to 13 for a specified time in accordance with a request inputted from the server 200 or the terminal 210 or 220. Generate data.

The controller 100 starts the logging of the data at a designated time, ends the logging of the data at the specified time, generates log data, and transmits the log data to the server or the terminal 210 or 220 that has requested the log data.

At this time, the controller 100 provides an interface through which the server can select and time the data recorded through the server function or the server 200.

The server 200 is connected to the controller 100, stores data for the chillers 11 to 13 received from the controller 100, and connects the plurality of terminals 210 and 220 to connect using the network N. ) Provides information about the chillers 11 to 13. The server 200 may establish a database for the chiller and store the chiller information.

Even if the controller 100 or the chillers 11 to 13 do not operate, the server 200 provides information on the chillers 11 to 13 to the terminals 210 and 220 based on pre-stored data.

The server 200 may include a program and an interface for chiller control, and provide a service for chiller control to the connected terminals 210 and 220, and may include an input means or a connected terminal 210 provided therein. Data input from the 220 may be transmitted to the controller 100. Accordingly, the server 200 may control not only the monitoring of the chillers 11 to 13 at a remote location through the controller 100, but also control the operation thereof.

At this time, the server 200 operates as a connection window for the chiller and the controller of the terminal, and the actual chiller control and data management are performed by the controller 100. The server 200 provides information on the chiller to the terminals 210 and 220 based on the data received from the controller 100 and provides a service such as a data request to the controller.

Terminals 210 and 220 are connected to the server 200 to display information on the chiller provided from the server 200, and transmits the data input by the user to the server 200. In some cases, the terminal 210 or 220 may directly access the chiller and the controller's own network to request and receive data.

At this time, the terminal 210, 220 may be provided with a program for checking the abnormality of the operation of the chiller by receiving log data from the server 200 or the controller 100.

Terminals 210 and 220 are devices capable of network (N) connection, and include a notebook computer and a computer, and a mobile device such as a mobile phone, a smartphone, a PMP, a PDA, a netbook, or the like may be used.

The plurality of chillers 11 to 13 each include a chiller unit and a heat exchange unit.

The chiller unit includes a compressor (not shown) through which refrigerant is circulated, a condenser (not shown), an expansion mechanism (not shown), and an evaporator (not shown). The heat exchange unit includes a hot water heat exchanger (not shown), Hot water demand destination (not shown) and cold water demand destination (not shown) are included.

The chiller unit has a condenser connected to a cooling tower (not shown) and a cooling water flow path (not shown), and an evaporator is connected to a cold water demand destination (not shown) and a cold water flow path (not shown).

The chiller unit condenses the refrigerant of the condenser while absorbing the heat of the refrigerant passing through the condenser, while the cooling water supplied from the cooling tower is heated by absorbing the heat of the refrigerant.

The chiller unit evaporates the refrigerant in the evaporator while the cold water supplied from the cold water demand source loses heat to the refrigerant passing through the evaporator, where the cold water is cooled by losing heat to the refrigerant.

The compressor compresses the refrigerant evaporated in the evaporator, and is composed of a variable capacity compressor such as an inverter compressor, a screw compressor, a turbo compressor, or a constant speed compressor such as a scroll compressor.

The expansion mechanism expands the refrigerant condensed in the condenser and consists of a capillary tube or an electronic expansion valve.

The heat exchange unit may be classified into a heat exchange method using air and a heat exchange method using water, and at least one may be used. In the heat exchange method using air, as an air conditioning unit that sucks and heats indoor air and discharges it to the room, it may be configured as a ventilation / air conditioning unit or may be configured as a non-ventilating air conditioning unit.

At this time, in the heat exchange method using air, the cold water demand destination is composed of an air handling unit (AHU: Air Handling Unit) for mixing the indoor air and the outdoor air, and then heats the mixed air with cold water and discharges it into the room, and is installed indoors. It may be composed of a fan coil unit (FCU: Fan Coil Unit) to suck the indoor air, heat exchange with cold water, and then discharge it into the room, or may be composed of a floor piping unit embedded in the floor of the room.

When a plurality of chiller units are provided, the plurality of chiller units may be controlled in the same manner while forming a group, and the cooling water flow path and the cold water flow path are preferably connected in parallel.

2 is a block diagram showing a control configuration of a controller according to an embodiment of the present invention. Referring to FIG. 2, the controller 100 includes a data unit 120, an input unit 130, an output unit 140, a communication unit 150, and a controller 110 that controls overall operations.

The input unit 130 includes at least one button or switch to apply data to the controller 110 as the button or switch is operated. As the input unit 130 operates, setting data for chiller control is input. At this time, not only the setting for the operation mode or the operation option of the chiller, but also the setting for the plurality of chillers or the setting for the individual operation of each chiller may be input.

The output unit 140 includes at least one output means such as a lamp, an indicator light such as an LED, a display unit, a speaker, and the like, and outputs operating states of the controller 100 and the chillers 11 to 13.

The output unit 140 not only outputs information on its own operating state of the controller, but also outputs setting information on the chillers 11 to 17 received through the communication unit 150, and information on the current operating state. .

In addition, the output unit 140 outputs a warning in at least one of a warning sound, a warning light, and a warning message in response to an operation state of the controller or the chiller.

In some cases, when a touch screen is provided, the touch screen operates as an input unit by inputting data input according to a touch operation to the controller 110 and at the same time as an output unit for outputting information on an operation state.

The data unit 120 stores control data for its own operation, and a control program and control data for controlling the chillers 11 to 13.

The data unit 120 stores operation data of each chiller received through the communication unit 150 and data received from a server or a terminal, and data generated during the operation may be temporarily stored.

In addition, the data unit 120 stores, according to a command of the controller 110, log data in which the specified data is recorded for a specified time period among the plurality of data of the chillers 11 to 13. In this case, log data stored in the data unit 120 is generated and stored according to a designated format.

The communicator 150 is connected to the plurality of chillers 10, 11 to 13, and receives operation state data for each chiller including measured values from a plurality of sensors provided in the chiller.

The communicator 150 transmits a control command according to a setting input through the input unit 130 to each chiller so that the chiller 10 performs a designated operation. In addition, the communication unit 150 may transmit and receive data with the server 200 or the terminals 210 and 220 through the network (N).

When the controller 100 is provided with a server function, the communication unit 150 transmits information on the operation of the chiller 10 to the connected terminals 210 and 220, and transmits data received from the terminal to the controller 110. Is authorized.

When the controller 100 does not have a server function, the communication unit 150 transmits and receives data to and from the server 200 according to a control command of the control unit 110, thereby transferring data to the chiller 10 to the server 200. Transmitted to be provided to the terminals 210 and 220 through the server 200, and the data received from the server 200 or the terminals 210 and 220 is applied to the controller 110 to transmit the data to the controller 110. The request is transmitted to the controller 110.

The controller 110 analyzes log setting data input from any one of the input unit 130, the server 200, and the terminal 210, 220, and designates data in which a log is recorded among a plurality of data of the chiller and is designated. Logging is started at the first time for data and logging is terminated at the second time.

The controller 110 generates a log record for a designated time of the designated data as log data and stores the log record in the data unit 120.

When the log setting data input from the input unit 130, the server 200, and the terminal 210, 220 are different from each other, the controller 110 separately logs the requested data according to the requested format for a specified time. Record and generate log data for each, save it, and send it.

In this case, the controller 110 outputs the stored log data through the output unit 140 or transmits the stored log data to the server 200 or the terminal 210 or 220 through the communication unit 150. In addition, the controller 110 converts the stored log data according to the requested format and then transmits the changed log data.

Accordingly, the server 200 receives and stores log data of a predetermined format from the controller 100 and outputs the same.

Here, when a request from the terminals 210 and 220 is received through the server 200, the controller 110 transmits log data according to the request of the terminal to the server 200, and the server 200 is a terminal. When connected, the log data can be downloaded.

Accordingly, the server 200 receives and stores log data of a predetermined format from the controller 100 and outputs the same.

When the terminal 210 or 220 requests log data through the server 200, the terminal 210 or 220 receives the requested log data by accessing the server 200 as described above, and requests the data directly from the controller 100. Receive log data from 100.

3 is a diagram referred to describe the flow of log data in the chiller system according to an embodiment of the present invention.

The terminals 210 and 220 access the controller 100 or the server 200 and request log data for the chiller.

The controller 100 or the server 200 processes the connection through authentication of the terminals 210 and 220 and provides a monitoring or remote control service for the chiller, as well as an interface supporting the log data request of the terminal. To provide.

Terminal access to the controller 100 is possible when the controller 100 supports the server function. When the controller is not equipped with the server function, the controller 100 requests log data through the server 200 provided separately. .

In this case, when the log data request, the terminal 210 (220) designates the type of data to be stored, and sets the start time and end time of the data log. Log data is used to check the operation of chiller, so you can specify specific data to check for abnormalities.

In addition, in specifying the start time and end time, it is possible to specify a condition to start or end the log when a certain event occurs in the chiller. In this case, not only data may be directly selected for data to be recorded, but also a condition may be set to request a log for data satisfying the condition.

The terminal 210 or 220 may initially designate and request the format of the log data, and in some cases, may designate the format when downloading the log data.

The server 200 receives a request of the terminal 210 and 220 and transmits the request to the controller 100.

In this case, the server 200 may not only operate as a connection window of the terminal, but also a log request may be directly input through an input means provided. In this case, the server 200 transmits the input log request to the controller 100.

The controller 100 analyzes the log data request of the chiller, which is directly input or received from the server 200 or the terminal 210, 220, and designates the data to record the log among a plurality of data, and at the designated time. Allow logging to start and end.

In this case, when the log data request includes a conditional expression, the controller 100 extracts data corresponding to the conditional expression, and starts and ends the log when an event matching the conditional expression occurs.

The controller 100 generates log data based on the log recording for the designated data. The controller 100 generates log data in a specified format in response to each request.

At this time, the controller 100 stores the data in a form that makes it easy to change the configuration and format of the data, generates log data, and converts the data as requested. The controller 100 may receive a request for log data in an XML format and generate and store log data in an XML format. In this case, the use of the XML format is only one example, and it is stated that other formats may be used, but are not limited thereto.

The controller 100 transmits the generated log data to the server 200 or the terminal 210 or 220. In this case, before the log data transmission, when the request format of the server 200 or the terminal 210 or 220 is changed, the log data is converted and transmitted.

When the terminal 210 requests the log data through the server 200, the controller 100 transmits the log data to the server 200, and the server 200 logs the terminal 210 and 220. It supports downloading of data.

4 is an exemplary diagram referred to for describing a method of designating a type and a time of data when storing log data according to an embodiment of the present invention.

The terminal 210, 220 or the server 200 requests log data from the controller 100 as shown in FIG. 4.

In this case, the terminal 210 or 220 may directly generate a log data request as shown in the drawing and transmit the same to the controller 100, but may be connected to the server 200 or the controller 100 to the server 200 or the controller 100. If a predetermined item is selected through an interface provided by the s), data is generated in a format as shown in the drawing, and log data may be requested to the controller 100.

When the log data is requested to the controller 100, the request data is set with the device name and the address of the corresponding device as shown in FIG. 410. This is to specify the device for which chillers among multiple installed chillers.

For example, if it is determined that there is an error in the first chiller in checking the abnormality of the chiller, a log for the first chiller (Chiller 1) is requested. At this time, as shown, the device name of the first chiller and the address 1 of the first chiller are designated. In this case, enter the server name (Server) and the server address (address 0) required for communication with the server.

At this time, the device designation is set by using the <Equipment> tag, and the device ID is used as the device name. If the controller 100 includes a server function, the ID of the controller 100 may be Server. In the following description, ID Server is an ID of a controller.

When the temperature difference between the set temperature and the cold water outlet temperature, or the compressor discharge temperature is high due to the abnormality of the first chiller (Chiller 1), as shown in the figure, the first chiller (Chiller 1) The set temperature, the cold water outlet temperature CHW_OUT, the cold water inlet temperature CHW_IN, the superheat degree, and the compressor discharge temperature DISCHARGE may be requested among the plurality of data.

The data requesting the log is entered in <LogData> tag, and the device name and the name of the device are entered together. That is, since it requests the set temperature (SETPOINT), the cold water outlet temperature (CHW_OUT), the cold water inlet temperature (CHW_IN), the superheat degree (SUPERHEAT), and the compressor discharge temperature (DISCHARGE) of the first chiller (Chiller 1), as shown in FIG. In the device name, a first chiller (Chiller 1) is described and each data name is set. At this time, since the set temperature is the desired temperature set by the user, the device name of the controller 100 or the server 200 is input. If the ID of the controller 100 is Server, it is set to use the set temperature SETPOINT of the control unit 100 (Server).

The start of the log is set to the <LogStart> tag (420), the end of the log is set to the <LogStop> tag (430).

The start of the log specifies that the log starts when one of the two conditions is satisfied through an OR operation on the first condition CHW HI and the second condition DSC HI. Also, the third condition ALARM STOP is checked to specify that the log is to be terminated.

At this time, the first condition (CHW HI), the second condition (DSC HI), and the third condition (ALARM STOP) are separately described as a conditional expression in the <Condition> tag. In this case, conditional expression is set by <Operation> and <Compare> tag.

The first condition CHW HI determines whether a result of subtracting the set temperature SETPOINT from the cold water outlet temperature CHW_OUT of the first chiller 1 is greater than 5, that is, the temperature of the cold water outlet temperature and the set temperature. If the difference is greater than 5 degrees, it is set to start logging.

The second condition DSC HI determines whether the compressor discharge temperature DISCHARGE of the first chiller 1 is greater than 80, and is set to start logging when the compressor discharge temperature is greater than 80.

The third condition ALARM STOP determines whether the alarm flag TOT_ALAM is set to 1 in the data of the first chiller 1, that is, stops the log when an alarm occurs in the first chiller 1. Is set to.

In this case, the conditional expression sets a condition for starting or ending data logging. The data used for the conditional expression and the type of data to record the actual log may be different.

When the log data request set as described above is received by the controller 100, the controller 110 analyzes the log data request as described above, and when one of the first condition and the second condition is satisfied, that is, the cold water outlet. If the temperature difference between the temperature and the set temperature is greater than 5 degrees or the compressor discharge temperature is greater than 80, log the selected data. In addition, when the third condition according to the alarm occurrence is satisfied, the controller 110 ends the log for the corresponding data and finally generates log data.

5 is a flowchart referred to for describing a method of storing log data according to system operation in a chiller system according to the present invention.

Referring to FIG. 5, the controller 100 receives a log data request from the input unit 130 or at least one of the server 200 and the terminal 210 and 220 (S310).

The control unit 110 of the controller 100 analyzes the log data request and checks the type of log request data included in the log data request and the log start time or log end time (S320).

In this case, as shown in FIG. 4, the type of recorded data may be set in the log data request, and conditions for a log start time and an end time may be set. If the conditional expression is included, the controller 110 determines whether the condition is satisfied by using data corresponding to the conditional expression.

The controller 110 determines that the log start time is satisfied when the set conditional expression according to the log start time is satisfied during the log data request (S330), and starts recording the log for the specified data.

In this case, the controller 110 requests and receives data designated as the chiller set in the log data request (S340), and periodically accumulates and stores the designated data in the data unit 120 (S350).

The controller 110 may record not only a change in the value of the data, but also information on a reference or call of the data with respect to the designated data.

For example, when the data specified in the log data is the cold water outlet temperature and the cold water inlet temperature of the first chiller, the cold water outlet temperature and the cold water inlet temperature are requested to the first chiller, and the corresponding data is accumulated and stored continuously over time.

Meanwhile, the controller 110 determines whether the log termination condition is satisfied even while storing the data (S360). When the log termination condition is satisfied, the control unit 110 stops logging of the specified data.

When the log recording is stopped, the controller 110 finally generates the log data based on the recording of the stored data, and transmits the log data to the requested device (S370).

When there are a plurality of requests for log data, the controller 110 stores the data log and generates log data in response to each request, and transmits the log data to the requested device.

When the log data request is input from the input unit 130, the controller 110 outputs the output through the output unit 140. When the request is received from the server 200, the controller 110 transmits the request to the server 200. When the request is directly received from the 220, the log data generated by the terminal is transmitted.

When the terminal 210 requests the log data through the server 200, the controller 100 transmits the log data to the server 200, and receives the server 200 to receive the log data. 220) to download the log data.

Accordingly, even without analyzing unnecessary data, remote controller can request specific data of specific chiller and check its value at remote site, and take over the state of chiller by receiving data stored for specified time or under specified condition. You can do it.

As described above, the chiller system according to the present invention and the method for storing the data log thereof have been described with reference to the illustrated drawings. However, the present invention is not limited by the embodiments and drawings disclosed herein, and the technical idea is within the scope of protection. Can be applied.

10, 11 to 13: Chiller 100: controller
110: control unit 120: data unit
130: input unit 140: output unit
150: communication unit
200: server 210, 220: terminal

Claims (14)

A plurality of chillers;
A terminal for requesting log data for at least one of the plurality of chillers; And
Connected with the plurality of chillers to monitor an operation state of the plurality of chillers and control the operation thereof;
And a controller for accumulating and storing information on the designated data of a predetermined chiller for a predetermined time, and generating and storing information on the accumulated stored data as log data in response to the log data request of the terminal for a designated time. Chiller system. The method of claim 1,
And the controller analyzes the log data request and generates the log data corresponding to a type of data, a log start time, and a log end time included in the log data request. The method of claim 2,
The controller analyzes the conditional expression included in the log data request, accumulates and stores information on the designated data when the condition according to the log start time is satisfied, and when the condition according to the log end time is satisfied, the controller Chiller system, characterized by stopping the storage of data. The method of claim 2,
The controller according to the data type, the chiller system, characterized in that for requesting the designated data to a predetermined chiller of the plurality of chillers, and accumulates and stores periodically until the log end time. The method of claim 1,
The server is connected to the network by the controller, the server stores the information on the plurality of chillers, provides an interface according to the log data request when the terminal is connected, and provides the log data generated from the controller to the terminal. Chiller system comprising more. The method of claim 5, wherein
And the controller converts the log data into a format requested from the server or the terminal and provides the converted log data. Receiving and analyzing a log data request from a terminal or a server;
Starting a log according to a condition included in the log data request and accumulating and storing information on specified data for a specified time;
Generating log data when the log is finished; And
Transmitting the log data to the terminal or server; Data log storage method of a chiller system comprising a. The method of claim 7, wherein
And analyzing the type of data included in the log data request, a log start time, and a log end time. The method of claim 8,
Regarding the log start time or the log end time set by at least one conditional expression, logging starts when the predetermined data included in the conditional expression satisfies the log start time, and ends the log when the log end time is satisfied. A method of storing a data log of a chiller system. The method of claim 8,
At the start of the log, the data log of the chiller system, characterized by requesting and storing the designated data to the chiller among a plurality of chillers according to the name and address of the chiller set in the data type and the name of the designated data. How to save. The method of claim 8,
And stopping the storage of the designated data and generating the log data according to a specified format when the log end time is reached. The method of claim 7, wherein
If the format requested from the terminal or server is different from the format of the log data, the data log storage method of the chiller system converts and transmits the log data according to the requested format. The method of claim 7, wherein
When a plurality of log data requests with different conditions are received, generating a different log data in response to each log data request. The method of claim 7, wherein
And transmitting the generated log data to the server so that the terminal downloads the log data through the server, when the log data request of the terminal is received through the server. .

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