KR102595562B1 - Smart Eco Freeze Prevention Management System - Google Patents

Abstract

The present invention relates to a smart eco freeze prevention management system (S).
To this end, the smart eco freeze prevention management system of the present invention divides the pipes of facilities where there is a possibility of freezing into arbitrary areas and comprehensively manages the pipes in each area. Freeze prevention installed in each area In the device, the main controller transmits the set pipe temperature to a plurality of heating controllers attached to the pipe, and the heating controller receives temperature information from a pair of adjacent temperature sensors and controls the power to supply to each heater in real time. , The main controller receives status information from the heating controller in real time, and the central control server receives piping status information in real time from the main controller in each area and transmits control commands to the main controller.
As a result, piping installed in large-scale facilities can be comprehensively managed, and energy efficiency can be improved as optimized energy supply is possible according to the load required for each location of the piping.

Description

Smart Eco Freeze Prevention Management System

The present invention relates to a smart eco freeze prevention management system. More specifically, a freeze prevention device is installed in each area demarcated in the facility, and a central control server receives piping status information in real time from the freeze prevention device in each area. Each freeze prevention device receives temperature information from a pair of temperature sensors adjacent to multiple heating controllers and controls the power to supply to each heater attached to the pipe in real time, preventing the pipe from freezing. This is about a smart eco freeze prevention management system that can reduce the energy load consumed in the process of preventing.

In the winter, as the outside temperature drops below freezing, fluids such as water present in the pipes of buildings or facilities also freeze. When the water freezes and changes phase into a solid, its volume expands, causing pipes to break and freeze.

Conventionally, in order to prevent freezing and rupture of pipes, a common method was to continuously install heating wires in the longitudinal direction of pipes in dangerous sections. Therefore, as the heating wires were installed in a length corresponding to the length of the pipe, the heating wires were used excessively. The number of heating wires was added according to the pipe standard, and heating wires of the same amount of power were uniformly installed for reasons of construction convenience. In particular, piping had an inefficient problem in terms of energy efficiency because it did not take this into consideration even though the required load may vary depending on its location.

For this reason, a point construction method has recently been proposed that prevents freezing and bursting by using the convection phenomenon of fluid induced within the pipe by installing a heater in a part of the pipe and heating it locally, rather than arranging the entire heating wire along the longitudinal direction of the pipe. It is becoming. In particular, the point construction method has the advantage of excellent energy efficiency because it can be flexibly applied depending on the region and location by calculating the required load differently considering the relative radius from the outside air, and by partially removing the insulation material provided to surround the pipe. There is also the advantage of easy construction because a heater can be installed.

Prior art literature related to the point construction method includes Patent Publication No. 10-2022-0003202 (published on January 10, 2022, hereinafter referred to as 'prior art document') proposed by the inventor of the present invention. The prior art document provides a planar heating element (1a) or a metal heater (1b) in a part of the pipe at risk of freezing, and each individual controller (3) based on temperature information provided by a plurality of temperature sensors (2). The operation of the planar heating element (1a) or metal heater (1b) was controlled.

The prior art literature attempted to improve energy efficiency by implementing partial heating of pipes, but as temperature sensors were placed at intervals of several meters or tens of meters, local weak points occurred in the pipes formed in the longitudinal direction. There was a problem.

In addition, an attempt was made to identify and control the information of the individual controllers (3) based on the system controller (4), but there were problems with delays in construction period and increased construction costs in the process of building communication lines separately from power lines, and this was improved. Even when using power line communication for this purpose, there were limitations in that data accuracy was impaired due to wavelength attenuation, noise generation, and transmission delay.

In addition, the conventional freeze prevention system has been proposed to enable real-time monitoring by implementing wired and wireless communication with terminals or computers by additionally providing a communication unit. However, in large-scale facilities, communication conflicts can occur as multiple devices and sensors are installed. There were limitations that made it difficult to effectively manage and control it.

Public Patent Publication No. 10-2022-0003202 (2022. 01. 10.) Registered Patent Publication No. 10-1936594 (2019. 01. 03.)

The present invention was proposed to solve the problems of the prior art described above. Even in large-scale facilities, pipe status information can be received in real time from freeze prevention devices in each area to comprehensively manage pipes, and it is possible to comprehensively manage pipes even in large-scale facilities. By controlling power in real time, energy consumption consumed in the process of preventing pipe freezes can be reduced, and freezes that can occur locally in vulnerable parts of pipes can be prevented. Installation is simple and economical using wireless communication. The purpose is to provide a smart eco freeze prevention management system that solves communication conflict problems.

In order to solve the above problem, the smart eco freeze prevention management system (S) of the present invention divides the pipes (P) of facilities where there is a possibility of freezing into arbitrary areas (AR n) and divides each area (AR) into arbitrary areas (AR _n ). In order to comprehensively manage the pipes (P) existing in the pipes (P), the set pipe temperature (T _p ) is transmitted to a plurality of heating controllers (120) attached to the pipes (P), and each heating a main controller 110 that receives status information of the temperature sensor 130 adjacent to the controller 120 in real time; To receive temperature information (T _n-1 , T _n ) directly from a pair of temperature sensors 130 adjacent on both sides and supply it to each heater (120A) attached to the pipe based on the set pipe temperature (T _p ). A heating controller 120 that controls power; A freeze prevention device installed in each area (AR), including a plurality of temperature sensors 130 that are attached to the pipe (P), measure temperature information, and transmit the temperature information in real time to the adjacent heating controllers 120 on both sides. (100); And the overall status information of each heating controller 120 and each temperature sensor 130 provided in the pipe (P) is received in real time from the main controller 110 of each area (AR), and sent to the main controller 110. It includes a central control server 200 that transmits control commands, and the heating controller 120 and temperature sensor 130 of the freeze prevention device 100 are arranged at intervals along the pipe P, and each temperature sensor (130) is located at the center between a pair of heating controllers 120 adjacent on both sides and receives temperature information of vulnerable parts spaced apart from the heater 120A, and each heating controller 120 is connected to a pair of temperature sensors adjacent on both sides. Direct communication is carried out only between the two temperature sensors 130, and each temperature sensor 130 is characterized by direct communication only between a pair of heating controllers 120 adjacent on both sides.

In addition, the central control server 200 transmits the set pipe temperature (T _p ) to the main controller 110 of each area (AR) or operates the circuit breaker 112 of the main controller 110 in an emergency. You can.

In addition, each heating controller 120 of the freeze prevention device 100 receives among the temperature information (T _n-1 , T _n ) of the adjacent temperature sensor 130 at a certain period (Pd) of communication with the main controller 110. By comparing the small value with the set pipe temperature (T _p ), the power to supply to the heater (120A) can be adjusted in real time.

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In addition, the central control server 200 communicates remotely with the mobile terminal 300 and transmits in real time the overall status information of each heating controller 120 and each temperature sensor 130 provided in the pipe (P), The mobile terminal 300 can transmit a control command to the central control server 200.

According to the smart eco freeze prevention management system (S) of the present invention, the main controller of the freeze prevention device provided in each area receives pipe status information from the heating controller in real time, and the central control server is the main controller installed in each area. By receiving status information in real time and transmitting control commands at the same time, it is possible to comprehensively manage piping installed in large-scale facilities.

In addition, each heating controller controls the power to be supplied to the heater in real time based on temperature information measured by adjacent temperature measuring units, enabling optimized energy supply according to the required load for each location of the pipe, thereby improving energy efficiency. There is.

Furthermore, the central control server can prepare for malfunction of the heating controller by transmitting the set piping temperature to the main controller of each area or by operating the circuit breaker of the main controller in case of overload.

In particular, since the heating controller equipped with a heater and the temperature sensor are placed at regular intervals along the pipe, each heating controller can control power by receiving temperature information from relatively weak areas away from the heater, thereby preventing local freezing and damage of the pipe. can be prevented.

In addition, the heating controller adjusts the power to supply to the heater in real time by comparing the temperature information of adjacent temperature sensors and the set pipe temperature at regular intervals when communicating with the main controller, enabling active, immediate and continuous load management. There is an advantage.

Meanwhile, the main controller wirelessly communicates with a plurality of heating controllers at a first frequency, and the heating controller wirelessly communicates with a temperature sensor at a second frequency, so that the construction of a separate communication line can be omitted, making installation easy and economical. there is.

In particular, depending on the embodiment, stable communication is possible by preventing frequency collisions by implementing time synchronization while simplifying using the same frequency band.

Above all, since the freeze prevention device in each area (AR) uses only the temperature information from a pair of temperature sensors adjacent to each heating controller, effective communication is possible while using the same frequency band, and temperature information from unnecessarily separated locations is possible. Since there is no need to use or operate a separate heating controller, the advantage of efficient control is demonstrated.

In addition, the central control server of the smart eco freeze prevention management system (S) of the present invention uses a separate communication line such as RS-485 with the main controller of each area, so it is connected to a plurality of heating controllers or temperature sensors constituting each freeze prevention device. Status information and control commands can be sent and received stably without communication conflict.

Figure 1 is a conceptual diagram showing a freeze prevention system according to prior art literature.
Figure 2 is a conceptual diagram showing the overall configuration of a smart eco freeze prevention management system according to an embodiment of the present invention.
Figure 3 is a conceptual diagram showing the configuration of a freeze prevention device according to an embodiment of the present invention.
4A to 4C are conceptual diagrams showing individual components of a freeze prevention device according to an embodiment of the present invention.
Figure 5 is a block diagram illustrating in time series a method of power control of a freeze prevention device according to an embodiment of the present invention.
Figure 6 is a conceptual diagram illustrating the overall communication principle of the smart eco freeze prevention management system according to an embodiment of the present invention.
Figure 7 is a conceptual diagram showing the wireless communication range of a freeze prevention device according to an embodiment of the present invention.
Figure 8 is a conceptual diagram showing a communication method of a freeze prevention device according to an embodiment of the present invention.
Figure 9 is a phase graph for a typical three-phase, four-wire alternating current.
Figure 10 is a phase graph for alternating current voltage showing synchronization points according to various embodiments of the present invention.
Figure 11 is a conceptual diagram illustrating in time series the concept and communication method of a group unit of a freeze prevention device according to an embodiment of the present invention.

Hereinafter, the smart eco freeze prevention management system (S) of the present invention will be described in detail based on the matters shown in the drawings.

The smart eco freeze prevention management system (S) of the present invention is installed to prevent the pipes (P) of large-scale facilities from freezing as shown in FIG. P) are divided into arbitrary areas (AR _n ) and the pipes (P) existing in each area (AR) are comprehensively managed.

To this end, in the smart eco freeze prevention management system (S) of the present invention, a freeze prevention device 100 is installed in each arbitrarily divided area (AR) for easy management, and the central control server 200 is configured to install each freeze prevention device 100. ) status information can be received in real time and necessary control commands can be transmitted. At this time, the area (AR) may be defined in units of floors or blocks constituting one facility.

In addition, according to the embodiment, the central control server 200 transmits status information of the pipe P in real time by remotely communicating with the mobile terminal 300 carried by the manager using a wide area communication network, and the central control server 200 transmits the status information of the pipe P in real time. A control command can be sent to (200).

Meanwhile, the freeze prevention device 100 according to an embodiment of the present invention is installed to manage the piping (P) in the partitioned area (AR) as shown in FIG. 3, and includes the main controller 110 and the piping. It is configured to include a plurality of heating controllers 120 and a plurality of temperature sensors 130 arranged at regular intervals along (P), and the main controller 110, the heating controller 120, and the temperature sensor 130 are Mutual information is transmitted and received using wireless communication.

More specifically, the main controller 110 transmits the set pipe temperature (T _p ) to each heating controller 120 and receives status information from each heating controller 120 in real time. The set piping temperature (T _p ) is preferably set in advance. In one embodiment, when water is a fluid, it does not freeze if it is above 0°C, but may be set to around 4°C in consideration of measurement error. Of course, the manager can also manually enter the desired temperature value, taking into account on-site conditions.

Meanwhile, the heating controller 120 receives temperature information (T _n-1 , T _n ) from a pair of adjacent temperature sensors 130 and supplies power to each heater (120A) attached to the pipe (P). By controlling in real time, the heating controller 120 is located at the center of a pair of adjacent temperature sensors 130 and provides power based on the temperature information (T _n-1 , T _n ) of the adjacent temperature sensor 130. It is desirable to control .

The heating controller 120 is connected to the heater 120A and operates the heater 120A attached to the pipe P using power supplied from the power line, and the control module 121 receives temperature from the temperature sensor 130. Based on temperature information (T _n-1 ,T _n ), it is controlled with appropriate power in real time. The control module 21 is preferably a microcontroller (MCU) that performs overall control and calculation of the heating controller 120, and the heater 120A is constructed by winding a heat wire on the surface of the pipe P, or It is preferable that the planar heating element is manufactured in the form of a nano film heater and attached to the surface of the pipe (P).

Meanwhile, the temperature sensing device 130 is attached to the pipe P, measures temperature information, and transmits the temperature information to a pair of adjacent heating controllers 120 in real time. It is preferable that the temperature sensing stop 130 is located in the center of a pair of adjacent heating controllers 120, so that it is installed at a location that is most vulnerable to freezing and rupture.

According to the smart eco freeze prevention management system (S) of the present invention, the central control server 200 receives status information of the pipe (P) from the main controller 110 of the freeze prevention device 100 installed in each area (AR). Since it receives in real time and transmits control commands to the main controller 110, it is possible to comprehensively manage piping installed in large-scale facilities.

In addition, the freeze prevention device 100 installed in each area (AR) has a plurality of heating controllers 120 arranged along the longitudinal direction of the pipe (P), each receiving the temperature received from a pair of adjacent temperature sensing devices 130. By controlling the power to supply to the heater (120A) in real time based on temperature information (T _n-1 , T _n ), optimal energy can be supplied variably according to the required load, which may vary depending on the location of the pipe (P). This has the advantage of improving energy efficiency.

Meanwhile, the main controller 110 constituting the freeze prevention device 100 of the present invention is shown in Figure 4a ((a) shows the external shape according to one embodiment, and (b) schematically shows the configuration. As shown, a display 111 is provided that provides various status information in real time, and the display 111 not only outputs various status information, but also allows information such as the set piping temperature (T _p ) to be input. Of course, it can be manufactured as a touch-type pad, and a separate input unit can be provided.

In addition, the main controller 110 is equipped with a circuit breaker 112 to cut off power based on the current value of the power line, an RF module 113 for wireless communication using a specific frequency, and a circuit breaker to block electric leakage. It may include an earth leakage circuit breaker 114 and a control module 115 that controls and calculates them as a whole.

Meanwhile, the display 111 provided in the main controller 110 receives status information of each heating controller 120 and each temperature sensing device 130 from each heating controller 120 in real time and displays the display 111. It can be displayed in . At this time, the status information provided by the display 111 includes the real-time temperature of each heating controller 120, accumulated power consumption, output level indicating real-time power compared to output, current, and real-time temperature of each temperature sensing device 130. can do.

Furthermore, as shown in Figure 4b ((a) shows the external shape according to one embodiment, (b) schematically shows the configuration), the heating controller 120 is a heater 120A. It may be equipped with its own temperature sensor 122 to measure its own temperature, and a pair of temperature sensing devices 130 adjacent to the first RF module 123 for wireless communication with the main controller 110. It is equipped with a second RF module 124 for wireless communication, and in addition, an alarm module 125 such as a buzzer or LED to display various status information, and an SSR that selectively blocks power supplied to the heater 120A. It may include a switch 126.

In addition, as shown in the configuration diagram of FIG. 4C, the temperature sensing device 130 is also equipped with a control module 131 to perform overall control and calculation, and a temperature sensor for measuring the temperature of the pipe (P). (132) is provided. In addition, an RF module 133 for wireless communication with the heating controller 120 is provided, and an alarm module 135 such as a buzzer or LED to display various status information including temperature information or abnormal conditions is included. can do.

Meanwhile, the central control server 200 can transmit the set piping temperature (T _p ) to the main controller 110 of each area (AR), and in case of emergency, the circuit breaker 112 of the main controller 110 or an earth leakage The circuit breaker 114 can be operated. More specifically, the main controller 110 is equipped with a circuit breaker 112 that cuts off the power based on the current value of the power line, so that it can cut off the supply of power when an overload occurs in the overall system, and detects an electric leak. An earth leakage circuit breaker 114 may be provided.

Therefore, the manager can prevent the occurrence of a fire through the central control server 200 when each heating controller 120 malfunctions in that the SSR switch 126 does not cut off the power supply despite overcurrent or an increase in temperature. It can be prevented.

Meanwhile, the smart eco freeze prevention management system (S) of the present invention is a freeze prevention device 100 installed in each area (AR), where the control module 121 of each heating controller 120 is adjacent to the temperature sensing device 130. The main technical difference is that the power to be supplied to the heater (120A) is controlled in real time based on the temperature information (T _n-1 ,T _n ) and the set pipe temperature (T _p ).

Specifically, each heating controller 120 and the temperature sensing device 130 equipped with the heater 120A are arranged at intervals along the pipe P, and the temperature sensing device 130 is connected to the adjacent heating controller 120. Since it is located in the center of , each heating controller 120 has the advantage of being able to precisely control power using the temperature information (T _n-1 , T _n ) of a pair of adjacent temperature sensing devices 130.

In addition, each heating controller 120 can control power by receiving temperature information of vulnerable parts separated from the heater 120A based on the temperature sensing device 130, thereby preventing local freezing of the pipe P. there is.

Figure 5 is a block diagram showing the principle by which the heating controller 120 controls the temperature of the pipe (P), in which the control module 121 of the heating controller 120 communicates with the main controller 110 at a certain period. For each (Pd), the power to be supplied to the heater (120A) is adjusted in real time by comparing the smaller value among the temperature information (T _n-1 , T _n ) of the adjacent temperature sensing device 130 with the set pipe temperature (T _p ). I do it.

More specifically, the control module 121 controls the connection and disconnection of the SSR switch 126 based on the temperature information (T _n-1 , T _n ) received from the temperature measuring unit 30 to provide the desired appropriate power. It is approved.

According to one embodiment, the control module 121 controls the power supplied to the heater 120A at a certain ratio (r) when the set pipe temperature (T _p ) is greater than the smaller value of the temperature information (T _n-1 , T _n ). ), and if the set pipe temperature (T _p ) is less than the smaller value among the temperature information (T _n-1 , T _n ), the power supplied to the heater (20a) is reduced by a certain ratio (r).

At this time, the reference power (output, W) supplied by the heating controller 120 to the first heater 120A can be determined by Equation 1 below.

[T _p : set piping temperature, T _e : outside temperature, D: outer diameter of insulation material, d: outer diameter of pipe (inner diameter of insulation material), α: surface heat transfer rate, λ: heat transfer rate of insulation material, l: spacing of temperature sensing device]

As a result, the heating controller 120 automatically calculates the standard power to supply to the heater 120A in consideration of the pipe size, the spacing of the heating controller (heater), the size of the insulation material, and the outside temperature, thereby ensuring optimized and efficient energy use. There are possible benefits to this. In addition, since some errors may occur due to construction skill or the quality of insulation or piping, the reference power can be set by additionally considering a predetermined margin in Equation 1 above.

Meanwhile, the outside temperature (T _e ) can be designated as a constant value according to the characteristics of the region and building, and can also be designated as a variable value by reflecting the outside temperature that changes in real time. However, according to the domestic Ministry of Land, Infrastructure and Transport notification standards, it is stipulated that 40 tons of Artylon insulation or 19 tons of rubber foam insulation should be applied to piping over 100 mm, and 25 tons of Artylon insulation or 13 tons of rubber foam insulation should be applied to pipes of 100 mm or less. It stipulates that

According to a preferred embodiment of the freeze prevention device (FP) of the present invention, considering a margin of 20 to 30% for the amount of heat required per unit meter (m) based on the extreme condition of -30°C, the heating controller (120) ) or the spacing (l) of the temperature sensing device 130 is a maximum of 26 m in the case of a diameter of approximately 150 mm (based on a heater 560 W), a maximum of 18 m in the case of a diameter of 80 mm (based on a heater 365 W), and a maximum of 18 m in the case of a diameter of 50 mm (based on a heater 365 W) It was confirmed to be economical and efficient as it can be spaced up to 15m away (based on 230W).

That is, the initial reference power (W) is supplied to the heater (120A) of the heating controller (120) in consideration of the specifications of the pipe (P) and the insulation material, and as shown in the block diagram of FIG. 5, the control module 121 By increasing or decreasing the power (output level) at this constant rate (r), it is actively and continuously variably controlled to find the optimal power. At this time, it is desirable that the temperature information that serves as the standard for control is discretely determined in units of 1°C.

Meanwhile, the control module 121 can transmit the current consumed in real time by the heater 120A to the main controller 110 as real-time status information, and when the current measured in real time exceeds the allowable range, the SSR switch ( 126) can be used to cut off the power supply.

In addition, the control module 121 can calculate real-time power consumption using the voltage and current consumed by the heater 120A and transmit the accumulated power consumption as real-time status information to the main controller 110. In particular, if the real-time power consumption is '0', it is determined that the heater (120A) is damaged, and the difference between the calculated real-time power consumption and the amount of heat calculated using the temperature information measured by the self-temperature sensor 122 exceeds the standard value. Even if it is determined that the heater 120A is in an abnormal state, the alarm module 125 may indicate whether the heater 120A is operating normally.

In addition, the control module 121 can cut off the power supply by operating the SSR switch 126 even when the temperature information is above the upper limit temperature (T _max ), and when the temperature falls below a certain temperature, the SSR switch 126 is activated again. You can resume power supply by operating .

In other words, the heating controller 120 of the present invention can automatically cut off the power supply in case of emergency, and can identify the abnormal state of the heater (120A) in real time, allowing immediate action by the manager to prevent piping (P) due to neglect of management. ) can fundamentally block freezing and bursting.

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Meanwhile, in the smart eco freeze prevention management system (S) of the present invention, as shown in FIG. 6, the central control server 200 includes the main controller 110 provided in the freeze prevention device 100 in each area (AR) and While a separate communication line such as RS-485 is used, the plurality of heating controllers 120 or temperature sensing devices 130 that make up the freeze prevention device 100 in each area (AR) transmit and receive information using wireless communication. I do it.

Therefore, as shown in FIGS. 6 and 7, the freeze prevention device 100 installed in each area (AR) uses wireless communication to eliminate the difficulties in construction and the hassle of maintenance caused by installing a separate communication line. Furthermore, simple construction is possible, and the advantage of stable communication without collision is demonstrated when various status information and control commands are transmitted and received in real time between the central control server 200 and the freeze prevention device 100.

In particular, in the individual freeze prevention device 100 constituting the present invention, each heating controller 120 and the temperature sensing device 130 are arranged at intervals along the pipe (P), and each heating controller 120 is connected to a pair of adjacent By communicating only between the temperature sensing devices 130 and each temperature sensing device (l30) communicating only between a pair of adjacent heating controllers 120, the heating controllers 120 use temperature information at unnecessarily spaced locations. Alternatively, a major technical differentiation exists in that efficient control is possible because there is no need to operate the heating controller 120, which is separated from the temperature sensing device 130.

For this purpose, the main controller 110 is equipped with an RF module 113 and communicates wirelessly at a first frequency (F1) with the first RF module 123 provided in a plurality of heating controllers 120, and the heating controller ( 120) is equipped with a second RF module 124 and can wirelessly communicate with the RF module 133 provided in the temperature sensing device 130 at a second frequency (F2) different from the first frequency (F1).

That is, the main controller 110 can receive various status information through wireless communication using each heating controller 120 and the first frequency (F1), and the heating controller 120 is also connected to the main controller 110. Control information can be received. However, the main controller 110 cannot communicate with each temperature sensing device 130, and each temperature sensing device 130 communicates the temperature with the adjacent heating controller 120 using the second frequency (F2). It only transmits information.

However, in order for the plurality of heating controllers 120 and the plurality of temperature sensing devices 130 to communicate wirelessly using only the specified second frequency (F2), the number of channels is limited, so time synchronization must be implemented.

To this end, in the present invention, as shown in FIG. 8, the main controller 110 simultaneously transmits the first frequency (F1) to each heating controller 120 for each command cycle (Bp) communicated with the heating controller 120. (Step ①). Afterwards, any heating controller (120 _n ) that has received the first frequency (F1) uses the n-th channel to request the first temperature information (T _a ) from the adjacent temperature sensing device (130 _n ). Send (F2) (step ②).

Next, the adjacent temperature sensing device (130 _n ), which has received the second frequency (F2), similarly transmits the first temperature information (T _a ) to the heating controller (120 _n ) using the second frequency (F2) of the n-th channel. It responds by transmitting (step ③), and the heating controller (120 _n ) changes the channel for communication to the n-1th channel (step ④).

Thereafter, the heating controller (120 _n ) is configured to request the second temperature information (T _b ) from the other temperature sensing device (130 _n-1 ) adjacent to the first temperature information (T _a ) with a time difference. The second frequency (F2) is transmitted using the channel (step ⑤), and another adjacent temperature sensing device (130 _n-1 ) that receives the second frequency (F2) similarly transmits the second frequency (F2) of the n-1th channel (step ⑤). It responds by transmitting the second temperature information (T _b ) to the heating controller (120 _n ) using F2) (step ⑥), and finally, the heating controller (120 _n ) sets the channel for communication to the nth channel again. Change (step ⑦).

That is, only at the time when the heating controller 120 requests temperature information, the temperature sensing device 130 responds by passively transmitting real-time temperature information to the heating controller 120, and thus, the limited second frequency ( By using F2), frequency collision phenomenon can be prevented in advance by implementing time synchronization while achieving simplification.

At this time, after transmitting the first frequency (F1) from the main controller 110 to the specific heating controller 120, the time required to transmit the next first frequency (F1) is defined as the command period (Bp). The command cycle (Bp) can be implemented in various ways, but it is preferable that the main controller 110 defines it by considering the frequency of the alternating current voltage used domestically.

More specifically, as shown in Figure 9, the main controller 110 of the present invention distributes the 3-phase 4-wire AC voltage used in Korea to each phase of R, S, and T, and can be used in any building. Since the 0V point (Zero-Cross Point (ZCP)) formed by the voltage of each phase all have the same characteristics, the main feature of using the ZCP of each phase as the synchronous command point of F1 and the request command point of F2 There is.

Meanwhile, the 220V AC voltage used in Korea has a frequency of 60Hz, so each phase has 60 cycles (60T) per second, and one cycle of each phase is 16.6mS, so there are 120 ZCPs per second. At this time, each ZCP can be easily identified with sensing hardware.

In one embodiment, as shown in (a) of FIG. 10, the timing at which the main controller 110 transmits a synchronization command to the plurality of heating controllers 120 using the first frequency (F1) is the first time on R. It may be the second ZCP (step ①). Thereafter, the point in time when the arbitrary heating controller 120 requests the first temperature information (T _a ) from the adjacent temperature sensing device (130 _n ) may be the second ZCP on R (step ②).

That is, steps ① and ② are performed in one cycle (1T) of the voltage wave, but the heating controller 120 requests second temperature information (T _b ) from another adjacent temperature sensing device (130 _n-1 ). The point in time may be a ZCP of another cycle on R (step ⑤). This is to ensure a certain time difference in order to stably avoid frequency collisions since the steps of receiving the first temperature information (T _a ) response (step ③) and changing the channel (step ④) are performed in between. For example, in Figure 10, the second temperature information (T _b ) is requested in the second ZCP of the third cycle (3T). Afterwards, the steps of receiving a response to the second temperature information T _b ) (step ⑥) and changing the channel (step ⑦) proceed sequentially, and in FIG. 10, synchronization is implemented using 4 cycles (T).

As a result, the freeze prevention device 100 of the individual area (AR) constituting the smart eco freeze prevention management system (S) of the present invention receives temperature information from a pair of temperature sensing devices 130 where each heating controller 120 is adjacent. Since only the second frequency (F2) is used, effective communication is possible while using the same frequency band, and there is no need to use temperature information at a separate location unnecessarily or operate a separated heating control unit, which provides the advantage of efficient control. do.

However, depending on the amount of power load transmitted to the heating controller 120 and the temperature sensing device 130 provided along the longitudinal direction of the pipe (P), the ZCP formed by the voltage of the R phase as well as the S and T phases is also the synchronous command of F1. It can be used as the starting point of F2’s request command. To this end, each heating controller 120 and the temperature sensing device 130 can be set to distinguish the supplied RTS phase in advance using a dip switch. Figure 10 (b) shows an embodiment in which a plurality of heating controllers 20 utilize different arbitrary three-phase voltages for synchronization.

Meanwhile, Figure 11a is a conceptual diagram illustrating the concept of a group unit of the freeze prevention device 100 for managing a plurality of pipes (P) existing in an individual area (AR) according to another embodiment of the present invention. 11b is a conceptual diagram showing a time-series method for group communication.

The group (G) can be defined as a unit smaller than the area (AR) in which frequency wireless communication is possible, and a plurality of heating controllers 120 and temperature sensing devices 130 sequentially arranged in an arbitrary pipe (P) A plurality of groups (G _n ) are formed by forming one group (G), and the plurality of groups (G _n ) can communicate wirelessly with one main controller 110 .

At this time, as shown in FIG. 11b, the main controller 110 first transmits the first frequency (F1) from the first ZCP on R to the heating controller (120 _n ) of the first group (G ₁ ), and then The groups (G) are sequentially synchronized at each time interval (Δt), so that the heating controller (120 _n ) provides first temperature information (T) to the adjacent temperature sensing device (130 _n ) for each group (G _1... G _n ). By requesting _a ) (step ②), the above-described subsequent steps (steps ③ to ⑦) can proceed sequentially.

Likewise, as shown in FIG. 11b, depending on the power load, the ZCP formed by the voltages of the R phase as well as the S and T phases within each group (G _1... G _n ) is also different at the time of the synchronous command of F1 and the time of the request command of F2. It can be used as

The smart eco freeze prevention management system (S) according to the present invention described above can be implemented in other specific forms by those skilled in the art without changing the technical idea or essential features of the present invention. You will be able to understand it.

Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the claims described later rather than the detailed description above, and the meaning and scope of the claims. All changes or modified forms derived from the scope and equivalent concept should be construed as being included in the scope of the present invention.

S:Smart Eco Freeze Prevention Management System
AR:Area P:Pipe
100: Freeze prevention device
110: main controller 111: display
112: Wiring breaker 113: RF module
120: Heating controller 120A: Heater
121: Control module 122: Own temperature sensor
123: 1st RF module 124: 2nd RF module
125: Alarm module 126: SSR switch
130: Temperature sensing device 133: RF module
200: Central control server 300: Terminal

Claims (7)

The pipes (P) of facilities that have the possibility of freezing are divided into arbitrary areas (AR _n ) and the freeze prevention management system (S) is used to comprehensively manage the pipes (P) in each area (AR). Regarding this,
The set pipe temperature (T _p ) is transmitted to a plurality of heating controllers 120 attached to the pipe (P), and status information of the temperature sensor 130 adjacent to each heating controller 120 is received from the heating controller 120. a main controller 110 that receives data in real time; To receive temperature information (T _n-1 , T _n ) directly from a pair of temperature sensors 130 adjacent on both sides and supply it to each heater (120A) attached to the pipe based on the set pipe temperature (T _p ). A heating controller 120 that controls power; A freeze prevention device installed in each area (AR), including a plurality of temperature sensors 130 that are attached to the pipe (P), measure temperature information, and transmit the temperature information in real time to the adjacent heating controllers 120 on both sides. (100); and
The overall status information of each heating controller 120 and each temperature sensor 130 provided in the pipe (P) is received in real time from the main controller 110 of each area (AR), and controlled by the main controller 110. It includes a central control server 200 that transmits commands,
The heating controller 120 and the temperature sensor 130 of the freeze prevention device 100 are arranged at intervals along the pipe P, and each temperature sensor 130 is located between a pair of heating controllers 120 adjacent on both sides. It is located in the center and receives temperature information from vulnerable parts spaced apart from the heater 120A, and each heating controller 120 communicates directly only between a pair of temperature sensors 130 adjacent on both sides, and each temperature sensor 130 A smart eco freeze prevention management system characterized by direct communication only between a pair of heating controllers (120) adjacent on both sides.
According to paragraph 1,
The central control server 200 transmits the set pipe temperature (T _p ) to the main controller 110 of each area (AR) or operates the circuit breaker 112 of the main controller 110 in an emergency. Smart eco freeze prevention management system.
According to paragraph 1,
Each heating controller 120 of the freeze prevention device 100 receives the smaller value among the temperature information (T _n-1 , T _n ) of the adjacent temperature sensor 130 at a certain period (Pd) of communication with the main controller 110. A smart eco freeze prevention management system that compares the set pipe temperature (T _p ) and adjusts the power to supply to the heater (120A).
delete delete delete According to paragraph 1,
The central control server 200 communicates remotely with the mobile terminal 300 and transmits in real time the overall status information of each heating controller 120 and each temperature sensor 130 provided in the pipe (P), and the mobile terminal (300) is a smart eco freeze prevention management system characterized by transmitting a control command to the central control server (200).