KR102647248B1 - Wireless Communication Type Eco-friendly Smart Freeze Protection Device - Google Patents

Abstract

The present invention relates to a wireless communication type eco-friendly smart freeze prevention device (FP).
To this end, the wireless communication type eco-friendly smart freeze prevention device of the present invention is installed to manage piping in a predetermined area where there is a possibility of freezing. It transmits the set pipe temperature to each heating controller and receives status information from each heating controller. A main controller receiving wireless communication; A plurality of heating controllers that receive temperature information directly from a pair of adjacent temperature sensors through wireless communication and control power to be supplied to each film heater attached to the pipe; and a plurality of temperature sensors attached to the pipe to measure temperature information and transmit the temperature information in real time to a pair of adjacent heating controllers through wireless communication.
The wireless communication type eco-friendly smart freeze prevention device of the present invention enables effective communication while using the same frequency band because each heating controller uses only temperature information from a pair of adjacent temperature sensors, and uses temperature information from unnecessarily spaced locations. The main technical difference lies in the fact that efficient control is possible because there is no need to operate a separate heating controller.

Description

Wireless Communication Type Eco-friendly Smart Freeze Protection Device}

The present invention relates to a wireless communication type eco-friendly smart freeze prevention device. More specifically, the main controller receives status information in real time from a plurality of heating controllers, and each heating controller receives temperature information from a pair of adjacent temperature sensors. By controlling the power to supply to each film heater attached to the pipe in real time, the energy load consumed in the process of preventing pipe freeze and burst can be reduced, and freeze and burst that can occur locally in vulnerable parts of the pipe can be prevented. It is about a wireless communication type eco-friendly smart freeze prevention device that is easy to install using wireless communication, is economical, and solves the problem of communication conflict.

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.

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. By controlling the power to be supplied to the heater in real time, the amount of energy consumed in the process of preventing pipe freezes can be reduced, and the vulnerable parts of the pipe can be reduced. The purpose is to provide a wireless communication type eco-friendly smart freeze prevention device that can prevent freezes and bursts that may occur locally and is economical because it is easy to install using wireless communication and solves the problem of communication conflict.

In order to solve the above problems, the wireless communication type eco-friendly smart freeze prevention device (FP) of the present invention is installed to manage the piping (P) in a predetermined area where there is a possibility of freezing, and each heating controller (20) A main controller (10) that transmits the pipe temperature (T _p ) set to and receives status information from each heating controller (20) through wireless communication; A plurality of devices receives temperature information (T _n , T _n+1 ) directly from an adjacent pair of temperature sensors 30 through wireless communication and controls the power to supply to each film heater (20a) attached to the pipe (P). heating controller (20); And a plurality of temperature sensors (30) attached to the pipe (P) to measure temperature information and transmit the temperature information in real time to a pair of adjacent heating controllers (20) through wireless communication; including, wherein the heating controller (20) and temperature sensors 30 are arranged at intervals along the pipe (P), and each temperature sensor 30 is located at the center between the film heaters 20a of a pair of adjacent heating controllers 20, and is located at the center of each heating controller 20. ) is a wireless communication type characterized in that it communicates directly only between a pair of adjacent temperature sensors 30 adjacent on both sides, and each temperature sensor 30 communicates directly only between a pair of adjacent heating controllers 20 on both sides. Eco-friendly smart freeze prevention device.

In addition, the main controller 10 is equipped with a display 11 to receive status information of each heating controller 20 and each temperature sensor 30 from each heating controller 20 in real time and display it on the display 11. It can be displayed.

Meanwhile, the control module 21 of the heating controller 20 operates the SSR switch 26 based on the temperature information (T _n , T _n+1 ) of the adjacent temperature sensor 30 and the set pipe temperature (T _p ). By controlling, the power to be supplied to the film heater 20a can be controlled.

In addition, the control module 21 uses the power consumption calculated using the voltage and current consumed by the film heater 20a and the temperature information measured by its own temperature sensor 22 to ensure that the film heater 20a is in an abnormal state. If it is determined that the temperature information measured by the self-temperature sensor 22 is higher than the upper limit temperature (T _max ), it is determined to be a malfunction and the power can be cut off using the SSR switch 26.

Additionally, the control module 21 may block the SSR switch 26 when the power consumed by the film heater 20a exceeds the allowable range.

In addition, the control module 21 of the heating controller 20 determines the smaller value among the temperature information (T _n , T _{n + 1} ) of the adjacent temperature sensor 30 every certain period (Pd) of communication with the main controller 10. By comparing the set pipe temperature (T _p ), the power to be supplied to the film heater 20a can be adjusted in real time.

And, the control module 21 controls the power supplied to the film heater 20a by a certain ratio (r) when the set pipe temperature (T _p ) is greater than the smaller value of the temperature information (T _n , T _n+1 ). increases, and if the set pipe temperature (T _p ) is less than the smaller value among the temperature information (T _n , T _n+1 ), the power supplied to the film heater 20a can be reduced by a certain ratio (r).

delete

In addition, the main controller 10 is equipped with an RF module 13 and wirelessly communicates with the first RF module 23 provided in the plurality of heating controllers 20 at a first frequency (F1), and the heating controller ( 20) is equipped with a second RF module 24 to enable wireless communication with the RF module 33 provided in the temperature sensor 30 at a second frequency (F2) different from the first frequency (F1).

In addition, the main controller 10 simultaneously transmits a broadcasting command to each heating controller 20 at the first frequency (F1) every command cycle (Bp) (step ①), and sends a broadcasting command to each heating controller 20 at the same time (step ①). _n ) transmits a second frequency (F2) using the n-th channel to request first temperature information (T _a ) from the adjacent temperature sensor (30 _n ) (step ②), and the adjacent temperature sensor that receives the request (30 _n ) transmits first temperature information (T _a ) to the heating controller (20 _n ) using the second frequency (F2) of the n-th channel (step ③), and the heating controller (20 _n ) communicates Change the channel to the n+1th channel, and use the n+1th channel to request second temperature information ( _Tb ) from another adjacent temperature sensor (30n ₊₁ ) to set the second frequency (F2). Transmits (step ④), and the other adjacent temperature sensor (30 _n+1 ), which has received the request, sends the second temperature information (20 _n ) to the heating controller (20 n) using the second frequency (F2) of the n+1 channel. By transmitting T _b ) (step ⑤), time synchronization of the frequency can be implemented.

And, the point in time at which any heating controller 20 requests temperature information (T) from the adjacent temperature sensor 30 may be the zero cross point (ZCP) formed by any phase constituting the alternating current voltage. .

According to the wireless communication type eco-friendly smart freeze prevention device (FP) of the present invention, each heating controller controls the power to be supplied to the film heater in real time based on temperature information measured by adjacent temperature sensors, thereby controlling the power required for each location of the pipe. There is an advantage in improving energy efficiency because optimized energy supply is possible depending on the load.

In particular, the heating controller and temperature sensor communicate directly wirelessly, eliminating inefficiencies caused by building a separate communication line, which has the advantage of being easy to construct and manage.

Preferably, the main controller communicates only between heating controllers, and the temperature sensor communicates only between adjacent heating controllers, so that the heating controller directly receives real-time temperature information from the temperature sensor, thereby reducing the burden of communication traffic handled by the main controller. As a result, immediate control of the film heater can be implemented without delay, thereby improving the efficiency of the overall device.

In addition, each heating controller uses temperature information from a pair of adjacent temperature sensors, enabling precise and accurate power control. It is also efficient because there is no need to use temperature information from separate locations unnecessarily or operate separate heating controllers. It has the advantage of being controllable.

Furthermore, since the heating controller equipped with a film heater and the temperature sensor are arranged 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 controlling the local power of the pipe. Freezing can be prevented.

Meanwhile, the main controller can receive the status information of the heating controller and temperature sensor from each heating controller and display it in real time. In case of overload, the power supplied to the heating controller is cut off using a circuit breaker to prevent malfunction of the heating controller. In preparation or in the event of an electric leak, the earth leakage circuit breaker can be activated.

In addition, each heating controller can use the power consumed by the film heater to transmit status information to the main controller in case of overload or underload, and calculate real-time power consumption using voltage and current to determine the normal condition of the film heater. Since it can be determined whether it is operating or not and displayed as an alarm module, the manager can take immediate action.

Furthermore, the heating controller automatically calculates the standard power to supply to the film heater by considering the pipe size, the spacing of the heating controller (heater), the size of the insulation material, and the set pipe temperature, enabling efficient energy use.

In addition, the heating controller adjusts the power to supply to the film 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 are possible benefits.

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.

Specifically, when the main controller transmits a simultaneous command to each heating controller at a first frequency at regular time intervals, any heating controller that receives the first frequency transmits temperature information to an adjacent temperature sensor at a second frequency at a time difference. When requesting, by using the ZCP of each phase as the simultaneous command point of the first frequency or the request command point of the second frequency, stable synchronization without collision is possible while using limited channels in the same frequency band.

Above all, the wireless communication type eco-friendly smart freeze prevention device of the present invention enables effective communication while using the same frequency band because each heating controller uses only the temperature information of a pair of adjacent temperature sensors, and enables temperature control at unnecessarily spaced locations. Since there is no need to use information or operate a separate heating controller, the advantage of efficient control is demonstrated.

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

Hereinafter, the wireless communication type eco-friendly smart freeze protection device (FP) of the present invention will be described in detail based on the details shown in the drawings.

As shown in FIG. 2, the wireless communication type eco-friendly smart freeze prevention device (FP) of the present invention is installed to manage the piping (P) in a predetermined area where there is a possibility of freezing and rupture, and includes the main controller 10 and the piping. It is configured to include a plurality of heating controllers 20 and a plurality of temperature sensors 30 arranged at regular intervals along (P), and the main controller 10, the heating controller 20, and the temperature sensor 30 are Mutual information is transmitted and received using wireless communication.

More specifically, the main controller 10 transmits the set pipe temperature (T _p ) to each heating controller 20 and receives status information from each heating controller 20 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.

As shown in FIG. 3A ((a) shows the external shape according to one embodiment, and (b) schematically shows the configuration), the main controller 10 provides various status information in real time. A display 11 is provided, and the display 11 can be manufactured as a touch-type pad so that information such as the set pipe temperature (T _p ) can be input as well as output various status information. Of course, an input unit may be provided.

In addition, the main controller 10 is equipped with a circuit breaker 12 to cut off power based on the current value of the power line, an RF module 13 for wireless communication using a specific frequency, and a circuit breaker to block electric leakage. It may include an earth leakage circuit breaker (14) and a control module (15) that controls and calculates them as a whole.

Meanwhile, the heating controller 20 is used to receive temperature information (T _n , T _n+1 ) from a pair of adjacent temperature sensors 30 and supply it to each film heater (20a) attached to the pipe (P). By controlling power in real time, the heating controller 20 is located at the center of a pair of adjacent temperature sensors 30 and operates based on the temperature information (T _n , T _n+1 ) of the adjacent temperature sensor 30. It is desirable to control power.

As shown in Figure 3b ((a) shows the external shape according to one embodiment, (b) schematically shows the configuration), the heating controller 20 includes a film heater 20a and The film heater (20a) attached to the pipe (P) is operated using the power supplied from the connected power line, and the control module 21 operates the temperature information (T _n , T _n+1 ) received from the temperature sensor 30. ), it is controlled with appropriate power in real time. The control module 21 is preferably a microcontroller (MCU) that performs the overall control and calculation of the heating controller 20, and the film heater 20a is a planar heating element attached to the surface of the pipe P. It is preferable that it be manufactured in the form of a film heater and attached to the surface of the pipe (P).

At this time, the film heater 20a is preferably attached to the heating controller 20 at a short distance to minimize exposed cables, and is placed close enough to be negligible compared to the distance of the adjacent temperature sensor 30. At this time, it is preferable that the heating controller 20 is installed on the pipe P using a separate clamp so that the heating controller 20 is not affected by the heat generated by the film heater 20a.

More specifically, the control module 21 controls the connection and disconnection of the SSR switch 26, which will be described later, based on the temperature information (T _n-1 , T _n ) received from the temperature sensor 30 to achieve the desired optimal temperature. Power is applied.

In addition, the heating controller 20 may be equipped with its own temperature sensor 22 for measuring its own temperature where the film heater 20a is located, and a first RF module for wireless communication with the main controller 10. A second RF module (24) is provided for wireless communication with a pair of temperature sensors (30) adjacent to (23), and in addition, an alarm module (25) such as a buzzer or LED to display various status information, and a film It may include an SSR switch 26 that selectively blocks power supplied to the heater 20a.

Meanwhile, the temperature sensor 30 is attached to the pipe P, measures temperature information, and transmits the temperature information to a pair of adjacent heating controllers 20 in real time. It is preferable that the temperature sensor 30 is located at the center of the film heater 20a provided in an adjacent pair of heating controllers 20, so that it is installed at a location most vulnerable to freezing and rupture. At this time, the center can be defined as a range of about 1 m on both sides from the exact half of the spacing l between the film heaters 20a, taking into account the error.

As shown in the configuration diagram of FIG. 3C, the temperature sensor 30 is also equipped with a control module 31 to perform overall control and calculation, and a temperature sensor 32 to measure the temperature of the pipe P. is provided. In addition, an RF module 33 for wireless communication with the heating controller 20 is provided, and an alarm module 35 such as a buzzer or LED to display various status information including temperature information and whether the device is operating normally. may include.

According to the wireless communication type eco-friendly smart freeze prevention device (FP) of the present invention, a plurality of heating controllers 20 arranged along the longitudinal direction of the pipe (P) each measure the temperature measured by a pair of adjacent temperature sensors 30. Based on the information (T _n , T _n+1 ), the power to be supplied to the film heater (20a) is controlled in real time by the SSR switch (26), so that it can be changed according to the required load, which may vary depending on the location of the pipe (P). This has the advantage of improving energy efficiency because it can supply optimal energy.

Meanwhile, the main controller 10 is equipped with a display 11 to receive status information of each heating controller 20 and each temperature sensor 30 from each heating controller 20 in real time and display it on the display 11. It can be displayed. At this time, the status information provided by the display 11 may include the real-time temperature of each heating controller 20, accumulated power consumption, output level indicating real-time power compared to output, current, and real-time temperature of each temperature sensor 30. You can.

Depending on the embodiment, the main controller 10 is equipped with a circuit breaker 12 that cuts off the power based on the current value of the power line, so that when an overload occurs in the overall system, the supply of power can be cut off and electrical leakage can be prevented. An earth leakage circuit breaker 14 that detects may be provided.

Meanwhile, the control module 21 of the heating controller 20 operates on the film heater 20a based on the temperature information (T _n , T _n+1 ) of the adjacent temperature sensor 30 and the set pipe temperature (T _p ). The main technological difference lies in controlling the power to be supplied in real time.

Specifically, each heating controller 20 equipped with a film heater 20a and a temperature sensor 30 are arranged at intervals along the pipe P, and the temperature sensor 30 is located at the center of the adjacent heating controller 20. Since it is located in , each heating controller 20 has the advantage of being able to precisely control power using the temperature information (T _n , T _n+1 ) of a pair of adjacent temperature sensors 30.

In addition, each heating controller 20 can control power by receiving temperature information of vulnerable parts spaced apart from the film heater 20a based on the temperature sensor 30, thereby preventing local freezing of the pipe P. there is.

Figure 4 is a block diagram showing the principle by which the heating controller 20 controls the temperature of the pipe (P), and the control module 21 of the heating controller 20 is a command cycle for communicating with the main controller 10. For each (Bp), the power to be supplied to the film heater 20a is adjusted in real time by comparing the smaller value among the temperature information (T _n , T _n+1 ) of the adjacent temperature sensor 30 with the set pipe temperature (T _p ). I do it.

According to one embodiment, the control module 21 controls the power supplied to the film heater 20a compared to the real-time power when the set pipe temperature (T _p ) is greater than the smaller value of the temperature information (T _n , T _n+1 ). It increases by a certain ratio (r), and if the set pipe temperature (T _p ) is less than the smaller value of the temperature information (T _n , T _n+1 ), the power supplied to the film heater (20a) is adjusted to a constant ratio (r) compared to the real-time power. r).

At this time, the heating controller 20 automatically calculates the standard power to supply to the film heater 20a by considering the pipe size, the spacing of the heating controller (film heater), the size of the insulation material, and the outside temperature, thereby providing optimized efficiency. It has the advantage of being able to use energy. In addition, since some errors may occur due to construction skill or the quality of insulation or piping, the standard power can be set by additionally considering a certain margin.

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 wireless communication type eco-friendly smart freeze prevention device (FP) of the present invention, based on extreme conditions of -30°C, considering a margin of 20 to 30% for the amount of heat required per unit meter (m) , the spacing (l) of the heating controller 20 or temperature sensor 30 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 diameter of 50 mm. In this case (based on heater 230W), it was confirmed to be economical and efficient as it can be spaced up to 15m away.

That is, the initial reference power (W) is supplied to the film heater (20a) of the heating controller (20) in consideration of the specifications of the pipe (P) and the insulation material, and as shown in the block diagram of FIG. 4, the control module (21) ) controls the SSR switch 26 to find the optimal power by increasing or decreasing the power (output level) at a constant ratio (r) compared to the real-time power, and is actively and continuously variable controlled. 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 21 can transmit the current consumed in real time by the film heater 20a to the main controller 10 as real-time status information, and when the current measured in real time exceeds the allowable range, the SSR switch The power supply can be cut off by operating (26).

In addition, the control module 21 can calculate real-time power consumption using the voltage and current consumed by the film heater 20a and transmit the accumulated power consumption as real-time status information to the main controller 10. In particular, if the real-time power consumption is '0', it is determined that the film heater 20a is damaged, and the amount of heat calculated using the calculated real-time power consumption and temperature information measured by the self-temperature sensor 22 is greater than or equal to the standard value. Even when it is determined that there is a difference, it is determined that the film heater 20a is in an abnormal state, and whether the film heater 20a is operating normally can be displayed by the alarm module 25.

In addition, the control module 21 determines that the film heater 20a is malfunctioning even when the received temperature information of its own temperature sensor 22 is above the upper limit temperature (T _max ) and operates the SSR switch 26 to turn on the power. The supply can be cut off, but if the temperature falls below a certain temperature, the SSR switch 26 can be operated again to resume power supply.

In other words, the heating controller 20 of the present invention can automatically cut off the power supply in an emergency, and can identify the abnormal state of the film heater 20a in real time, allowing immediate action by the manager to prevent piping due to neglect of management. P) can be prevented from freezing at the source.

On the other hand, as shown in Figure 5, the wireless communication type eco-friendly smart freeze prevention device (FP) of the present invention eliminates the difficulties in construction and the hassle of maintenance caused by installing a separate communication line using wireless communication, making construction simple. There are possible benefits to this.

More specifically, each heating controller 20 and the temperature sensor 30 are arranged at intervals along the pipe P, so that each heating controller 20 communicates only between a pair of adjacent temperature sensors 30, and each temperature sensor 30 communicates with each other. The sensor 30 also communicates only between a pair of adjacent heating controllers 20, so that the heating controller 20 uses temperature information at a location that is unnecessarily spaced apart, or uses the heating controller 20 spaced apart from the temperature sensor 30. ) The main technical differentiation lies in the fact that efficient control is possible because there is no need to operate the device.

For this purpose, the main controller 10 is equipped with an RF module 13 and communicates wirelessly at a first frequency (F1) with the first RF module 23 provided in a plurality of heating controllers 20, and the heating controller ( 20) is equipped with a second RF module 24 to enable wireless communication with the RF module 33 provided in the temperature sensor 30 at a second frequency (F2) different from the first frequency (F1).

That is, the main controller 10 can receive various status information through wireless communication using each heating controller 20 and the first frequency (F1), and the heating controller 20 is also connected to the main controller 10. Control information can be received. However, the main controller 10 cannot communicate with each temperature sensor 30, and each temperature sensor 30 provides temperature information through wireless communication with the adjacent heating controller 20 using the second frequency (F2). Just transmit it.

However, in order for the plurality of heating controllers 20 and the plurality of temperature sensors 30 to communicate wirelessly using only the specified second frequency (F2) band, the number of channels is limited, so time synchronization must be implemented.

To this end, the present invention, as shown in FIG. 6, the main controller 10 transmits a simultaneous command (Broadcasting Command) to each heating controller 20 at a first frequency every command cycle (Bp) communicated with the heating controller 20. Simultaneously transmit to (F1) (step ①). Afterwards, any heating controller (20 _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 sensor (30 _n ) with the second frequency ( Send F2) (step ②).

Next, the adjacent temperature sensor 30 _n , which has received the second frequency F2, also provides first temperature information T _a to the heating controller 20 _n using the second frequency F2 of the n-th channel. In response to transmission (step ③), the heating controller ( _20n ) changes the channel for communication to the n+1th channel. Thereafter, the heating controller (20 _n ) uses the n+1 channel to request second temperature information (T _b ) from another temperature sensor (30 _n+1 ) adjacent to the first temperature information (T _a ) with a time difference. Transmit the second frequency (F2) using (step ④).

Another adjacent temperature sensor (30 _n+1 ) that has received the second frequency (F2) similarly sends the second temperature information (T _b ) to the heating controller (20 _n ) using the second frequency (F2) of the n+1 channel. ) to respond (step ⑤). Afterwards, the heating controller 20 _n can change the communication channel to the nth channel again.

That is, only at the time when the heating controller 20 requests temperature information, the temperature sensor 30 responds by passively transmitting real-time temperature information to the heating controller 20, and thus, the limited second frequency (F2) ) By using the band, it is possible to achieve simplification and time synchronization to prevent frequency collisions in advance.

At this time, after transmitting a simultaneous command from the main controller 10 to the specific heating controller 20 at the first frequency (F1), the time required to transmit the next simultaneous command at the first frequency (F1) is the command cycle. It can be defined as (Bp), and the command cycle (Bp) can be implemented in various ways, but it is preferable that the main controller 10 defines it by considering the frequency of the alternating current voltage used domestically.

More specifically, in the wireless communication type eco-friendly smart freeze protection device (FP) of the present invention, as shown in FIG. 7, the main controller 10 controls the three-phase, four-wire AC voltages used in Korea into R, S, It is distributed to each phase of T, and since the 0V point (Zero-Cross Point (ZCP)) formed by the voltage of each phase in any building has the same characteristics, the ZCP of each phase is set to the first frequency. The main feature is that it is used as the synchronous command time of (F1) or the request command time of the second frequency (F2_).

Meanwhile, the 220V AC voltage used in Korea has a frequency of 60Hz, so each phase has 60 cycles per second (60T), 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. 8, the timing at which the main controller 10 transmits a synchronization command to the plurality of heating controllers 20 using the first frequency (F1) is the first time on R. It may be the second ZCP (step ①). Thereafter, the point at which a random heating controller 20 requests first temperature information (T _a ) from an adjacent temperature sensor (30 _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 at the point when the heating controller 20 requests second temperature information (T _b ) from another adjacent temperature sensor (30 _n+1 ) may be a ZCP of another cycle on R (step ④). 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 8, the second temperature information (T _b ) is requested in the second ZCP of the third cycle (3T). Afterwards, the steps of receiving the second temperature information (T _b ) in response (step ⑤) and changing the channel proceed sequentially. In FIG. 8, synchronization is implemented using 4 cycles (T).

As a result, the wireless communication type eco-friendly smart freeze prevention device (FP) of the present invention uses only the temperature information of a pair of temperature sensors 30 adjacent to each heating controller 20, so it uses the same frequency band called the second frequency (F2). Effective communication is possible while being used, and there is no need to use temperature information from a spaced location unnecessarily or operate a spaced heating controller, providing the advantage of efficient control.

However, depending on the amount of power load transmitted to the heating controller 20 and the temperature sensor 30 provided along the longitudinal direction of the pipe (P), the ZCP formed by the voltages of the R phase as well as the S and T phases also increases at the first frequency (F1). ) can be used as the synchronization command time or the request command time of the second frequency (F2). To this end, each heating controller 20 and temperature sensor 30 can be set to distinguish the supplied RTS phase in advance using a dip switch. Figure 8 (b) shows an embodiment in which a plurality of heating controllers 20 utilize different arbitrary three-phase voltages for synchronization.

Meanwhile, Figure 9a is a conceptual diagram illustrating in time series a group-based communication method of a wireless communication-type eco-friendly smart freeze prevention device (FP) according to an embodiment of the present invention, and is a plurality of devices sequentially arranged in an arbitrary pipe (P). The heating controller 20 and the temperature sensor 30 form one group (G) to form a plurality of groups (G _n ), and the plurality of groups (G _n ) are connected to one main controller (10) and a wireless Can communicate.

At this time, as shown in FIG. 9B, the main controller 10 first transmits a simultaneous command at the first frequency (F1) from the first ZCP on R to the heating controller (20 _n ) of the first group (G ₁ ). , the groups (G) are sequentially synchronized at random time intervals (Δt), and the heating controller (20 _n ) transmits first temperature information to the adjacent temperature sensor (30 _n ) for each group (G _1... G _n ). By requesting (T _a ) (step ②), the above-described subsequent steps (steps ③ to ⑤) can proceed sequentially.

Likewise, as shown in FIG. 9b, 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 at the time of the synchronization command of the first frequency (F1) or It can be used as the request command point of the second frequency (F2). As a result, it is possible to implement precision wireless communication without frequency collision by realizing synchronization timing accuracy.

The wireless communication-type eco-friendly smart freeze protection device (FP) 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 understand that you can.

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.

FP: Wireless communication type eco-friendly smart freeze prevention device
10: Main controller 11: Display
12: Wiring breaker 13: RF module
14: Earth leakage circuit breaker 15: Control module
20: Heating controller 20a: Film heater
21: Control module 22: Own temperature sensor
23: 1st RF module 24: 2nd RF module
25:Alarm module 26:SSR switch
30: Temperature sensor 31: Control module
32: Temperature sensor 33: RF module

Claims (11)

It relates to a freeze prevention device (FP) installed to manage pipes (P) in a predetermined area where there is a possibility of freezing.
A main controller (10) that transmits the set pipe temperature (T _p ) to each heating controller (20) and receives status information from each heating controller (20) through wireless communication;
A plurality of devices receives temperature information (T _n , T _n+1 ) directly from an adjacent pair of temperature sensors 30 through wireless communication and controls the power to supply to each film heater (20a) attached to the pipe (P). heating controller (20); and
A plurality of temperature sensors (30) attached to the pipe (P) that measure temperature information and transmit the temperature information in real time to a pair of adjacent heating controllers (20) via wireless communication,
The heating controller 20 and the temperature sensor 30 are arranged at intervals along the pipe P, and each temperature sensor 30 is located at the center between the film heaters 20a of a pair of adjacent heating controllers 20. Therefore, each heating controller 20 communicates directly only between a pair of adjacent temperature sensors 30 adjacent on both sides, and each temperature sensor 30 communicates directly only between a pair of adjacent heating controllers 20 on both sides. Features a wireless communication type eco-friendly smart freeze prevention device.
According to paragraph 1,
The main controller 10 is equipped with a display 11 to receive status information of each heating controller 20 and each temperature sensor 30 from each heating controller 20 and display it on the display 11. A wireless communication type eco-friendly smart freeze prevention device.
According to paragraph 1,
The control module 21 of the heating controller 20 controls the SSR switch 26 based on the temperature information (T _n , T _n+1 ) of the adjacent temperature sensor 30 and the set pipe temperature (T _p ). A wireless communication type eco-friendly smart freeze prevention device characterized by controlling the power to be supplied to the film heater (20a).
According to paragraph 3,
The control module 21 determines that the film heater 20a is in an abnormal state using power consumption calculated using the voltage and current consumed by the film heater 20a and temperature information measured by its own temperature sensor 22. Or, if the temperature information measured by the self-temperature sensor 22 is above the upper limit temperature (T _max ), it is judged to be a malfunction and the power is cut off using the SSR switch 26. prevention device.
According to paragraph 3,
The control module (21) is a wireless communication type eco-friendly smart freeze prevention device, characterized in that it blocks the SSR switch (26) when the power consumed by the film heater (20a) exceeds the allowable range.
According to paragraph 3,
The control module 21 of the heating controller 20 sets the smaller value among the temperature information (T _n , T _n+1 ) of the adjacent temperature sensor 30 at a certain period (Pd) of communication with the main controller 10. A wireless communication type eco-friendly smart freeze prevention device characterized by comparing the pipe temperature (T _p ) and adjusting the power to be supplied to the film heater (20a) in real time.
According to clause 6,
The control module 21 is,
If the set pipe temperature (T _p ) is greater than the smaller value among the temperature information (T _n , T _n+1 ), the power supplied to the film heater (20a) is increased by a certain ratio (r),
A wireless communication type that reduces the power supplied to the film heater (20a) by a certain ratio (r) when the set pipe temperature (T _p ) is less than the smaller of the temperature information (T _n , T _n+1 ). Eco-friendly smart freeze prevention device.
delete According to paragraph 1,
The main controller 10 is equipped with an RF module 13 and communicates wirelessly with the first RF module 23 provided in the plurality of heating controllers 20 at a first frequency (F1),
The heating controller 20 is equipped with a second RF module 24 to wirelessly communicate with the RF module 33 provided in the temperature sensor 30 at a second frequency (F2) different from the first frequency (F1). Features a wireless communication type eco-friendly smart freeze prevention device.
According to clause 9,
The main controller 10 simultaneously transmits a broadcasting command to each heating controller 20 at the first frequency (F1) every command cycle (Bp) (step ①),
Any heating controller (20 _n ) transmits a second frequency (F2) using the n-th channel to request first temperature information (T _a ) from the adjacent temperature sensor (30 _n ) (step ②),
The adjacent temperature sensor (30 _n ), which has received the request, transmits the first temperature information (T _a ) to the heating controller (20 _n ) using the second frequency (F2) of the n-th channel (step ③),
The heating controller (20 _n ) changes the channel for communication to the n+1-th channel and requests the second temperature information (T _b ) from another adjacent temperature sensor (30 _n+1 ). Transmit the second frequency (F2) using (step ④),
Another adjacent temperature sensor (30 _n+1 ) that has received the request transmits the second temperature information (T _b ) to the heating controller (20 _n ) using the second frequency (F2) of the n+1 channel (step ⑤),
A wireless communication type eco-friendly smart freeze prevention device characterized by implementing time synchronization of frequencies.
According to clause 10,
The point in time at which any heating controller 20 requests temperature information (T) from the adjacent temperature sensor 30 is the zero cross point (ZCP) formed by any phase constituting the alternating current voltage. Wireless communication type eco-friendly smart freeze prevention device.