KR200427916Y1 - Building Management Control System which uses Direct Digital Controller of two wire DC Power Line Communication and Key Pad - Google Patents

Abstract

The direct digital controller for automatic control of building equipment according to the present invention displays an input unit for receiving control commands and setting values for controlling a control target device constituting the building equipment, and a menu screen for receiving control commands and setting values. The control unit generates a control signal for controlling the controlled device based on the control command and the set value inputted from the keypad and the display unit for displaying information on the operation state and the measured value of the controlled device, and transmits it from the controlled device. And a central processing unit that executes a predetermined control program that performs a function of processing operation state information and measured values to be displayed on the display unit. In addition, the direct digital controller can control the controlled device through the two-wire control module connected by a two-wire DC power line communication method. According to the present invention, the building equipment manager has the advantage of directly controlling and monitoring the target device directly from the digital controller input unit, and distributing the compact two-wire control module at a long distance eliminates the need for pipe wiring that is concentrated in one place. As a result, the construction cost can be reduced.

Building equipment, automatic control, direct digital controller, 2-wire

Description

Building Management Control System which uses Direct Digital Controller of two wire DC Power Line Communication and Key Pad}

1 is a schematic diagram showing the configuration of the automatic building equipment control system according to an embodiment of the present invention,

2 is a block diagram showing in detail the configuration of the DDC illustrated in FIG.

3 is a diagram illustrating a configuration in which a DDC independently controls one air conditioner according to an embodiment of the present invention;

4 is a diagram illustrating a configuration in which a DDC controls a control target device through a two-wire control module according to another embodiment of the present invention;

5 is a view showing in more detail that the DDC and the two-wire control module of Figure 4 is connected in a two-wire communication method.

<Explanation of symbols for the main parts of the drawings>

100: automatic building equipment control system 110: administrator computer

120: network controller 130: direct digital controller

131: central processing unit 132: power supply

133: communication unit 134: memory unit

135: display unit 136: input unit

137a, 137b, 137c, 137d: AI, AO, DI, DO function unit 140: Control target device

The present invention relates to a direct digital controller for automatic control of building equipment and an automatic control system of building equipment. More specifically, the present invention relates to a direct digital controller having a display unit and an input unit to enable the identification and control of an operating state of a building facility in a field, and a building equipment automatic control system constructed of a direct digital controller according to the present invention.

Recently, in medium and large buildings such as business buildings, public institution buildings, apartments, etc., field devices such as air conditioners, boilers, pumps, etc. to maintain indoor air condition, by controlling the temperature, humidity, and cleanness of indoor air, etc. The building facilities are built. In addition, a direct digital controller (hereinafter referred to as 'DDC') and a building equipment automatic control system for controlling such field devices are being built in a building.

The DDC of the conventional automatic building equipment control system is not provided with a keypad for directly receiving setting parameters from a building equipment operator and an LCD panel for displaying the operation status of the field controller.

Therefore, in order to confirm or control the operation state of the site control device, it was not possible to confirm or control the operation state of the site control device through the manager computer until after the construction of the building equipment automatic control system was completed.

Therefore, there is a problem in that it is not possible to check whether the operation of the field control device during the construction of the automatic building equipment control system. In addition, when communication between the manager computer and the DDC is lost, it is difficult for the building facility manager to check whether the site controller is operating normally.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a direct digital controller and a building equipment automatic control system having a display unit and an input unit so that the operation state of the building equipment can be identified and controlled in the field. .

The building equipment automatic control system according to the present invention to achieve the above object, the control target device constituting the building equipment, and the control target device based on the control command and the set value input from the outside, the control target And a direct digital controller configured to process and display operation state information and measured values transmitted from a device, wherein the direct digital controller includes: an input unit for receiving the control command and the set value, and for receiving the control command and the set value; A display unit for displaying a menu screen and displaying information on an operation state and measured values of the control target device; and a control signal for controlling the control target device based on a control command and a set value input from the keypad unit. Is generated, and processed to be displayed on the display unit by processing operation state information and measured values transmitted from the control target device. And a central processing unit that executes a predetermined control program that performs a function of locking.

The direct digital controller may further include an analog output function unit for outputting the control signal to the control target device in analog form, a digital output function unit for outputting the control signal to the control target device in digital form, and the measured value. The apparatus may further include at least one of an analog input function unit receiving an analog form and a digital input function unit receiving the operation state information in a digital form.

In addition, the building equipment automatic control system is connected to the direct digital controller in a two-wire DC power line communication method, an analog output function unit for outputting the control signal to the control target device in analog form, the control signal in a digital form A two-wire control module including at least one of a digital output function unit outputting the control target device, an analog input function unit receiving the measurement value in an analog form, and a digital input function unit receiving the operation state information in a digital form It is preferable to further include.

In addition, a manager computer for centrally controlling the direct digital controller,

The network controller may further include a network controller for interfacing two-way communication between the manager computer and the direct digital controller, wherein the direct digital controller further includes a communication unit for communicating with the manager computer.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a schematic diagram showing the configuration of the automatic building equipment control system according to an embodiment of the present invention.

Referring to Figure 1, the building equipment automatic control system 100 according to an embodiment of the present invention is a manager computer 110, network controller 120, direct digital controller (DDC: 130) and field control device 140 It includes, and performs the function of controlling and monitoring the operation of the building equipment (not shown) such as an air conditioner installed in the building. In addition, it may further include a remote computer 190 connected to the administrator computer 110 and the DDC 130 over the Internet.

More specifically, the building equipment automatic control system 110 is a field control device (140: hereinafter 'controlled device'), such as motor control sensors, motor start / stop devices, valve actuators, temperature and humidity sensors, and the like installed in building equipment. Control, monitoring, and use history management to ensure that the building equipment is properly operated for the purpose of use.

The manager computer 110 is a communication terminal device used by the building equipment manager, is connected to the DDC 130 through the Ethernet network 1000, and performs two-way communication. The plurality of DDCs 130 are connected using the network controller 120. It can communicate with. Communication between the manager computer 110 and the DDC 130 may be made by protocols such as TCP / IP, BACnet / IP, Modbus, and the like. The manager computer 110 transmits a control command and a setting value input from the manager to the DDC () to monitor and control the controlling device 140.

Here, the control command may be a start / stop command for the building equipment. The set value may be an upper and lower limit set by the starting condition of the building equipment. For example, in the case of a boiler, it may be controlled to start at a temperature set as a lower limit of the room temperature and to stop starting at a temperature set to an upper limit of the room temperature. As another example of the setting value, if the upper limit value for the number of start stop operations of the control target device is set, an alarm is generated when the number of start stop operations exceeds the corresponding upper limit value, so that the control target device can be monitored.

In addition, the manager computer 110 stores various information such as the operation state of the control target device 140 and the measured values (temperature, humidity, air cleanliness, etc.) reported from the DDC 130. On the other hand, the manager computer 110 may notify the manager by displaying the operation state, the measured value and the alarm occurrence of the control target device 140 on the screen.

The DDC 130 directly controls the control target device 140 based on the control command and the set value transmitted from the manager computer 110, and provides the manager computer with information about the operation state and measured values of the control target device 140. Report to (110).

In particular, the DDC 130 according to the present invention can receive the control command and the set value directly from the building equipment manager without input from the manager computer 110, and independently monitor and control the control target device 140 It can also be done. To this end, the DDC 130 according to the present invention is an input unit (not shown) for receiving a control command and a set value directly from the building equipment manager and a display unit (not shown) for displaying the operation state of the control target device 140 It is provided.

Hereinafter, the configuration of the DDC according to an embodiment of the present invention will be described in detail with reference to FIG. 2.

FIG. 2 is a block diagram illustrating in detail the configuration of the DDC illustrated in FIG. 1.

The DDC 130 according to an embodiment of the present invention includes a power supply unit 132, a communication unit 133, a memory unit 134, a central processing unit 131, an analog input function unit 137a, and an analog output function unit 137b. And a digital input function unit 137c, a digital output function unit 137d, a display unit 135, and an input unit 136. Here, the DDC 130 according to the present invention is the power supply unit 132, the communication unit 133, the central processing unit 131, the memory unit 134, analog input / output function unit 137a, 137b, digital input / output function unit 137c, 137d) is preferably implemented on one printed circuit board (PCB).

The power supply unit 132 performs a function of supplying operating power to the DDC 130. The operating power may be normally supplied to the DDC 130 from the outside, and may be implemented such that the battery is embedded in the DDC () in case of power failure.

The communication unit 133 performs a function of interfacing communication between the external device and the DDC 130. The communication unit 133 according to the present invention may be connected to the manager computer 110 through the Ethernet network 1000 to perform two-way communication. According to an embodiment, the communication unit 133 may be connected to a computer 190 located at a remote location through the Internet. You can also communicate.

The memory unit 134 stores a control program for allowing the DDC 130 to control the control target device 140 based on the control command and the set value input from the manager computer 110 or the input unit 136. In addition, the memory unit 134 stores measured values and operation state information transmitted from the control target device 140 and provides them according to the request of the central processing unit 131.

The input unit 136 receives a control command, a setting value, etc. for controlling the control target device 140 from the administrator and transmits the same to the central processing unit 131. The input unit 136 may be implemented as a keypad or a touch screen that can receive numbers and characters, and may be implemented to receive control commands and setting values from other administrators.

The display unit 135 displays a menu screen for receiving a control command, a set value, etc. from the administrator, and may display information on an operation state, measured values, etc. of the control target device 140 and provide the same to the administrator. Here, the display unit 140 may be implemented by an LCD panel, and other display means may be used.

The central processing unit 131 controls the overall operation of the DDC 130, and in particular, according to the present invention, the control target device 140 is controlled based on a control command and a setting value input from the outside using a control program. The central processing unit 131 may be implemented as a microcomputer. Here, the control program may be written on the basis of C-language, and operate the DDC to control the control target device according to the control command and the set value input from the building facility manager.

The analog input function unit 137a (hereinafter, referred to as an “AI function unit”) receives temperature and humidity information measured by temperature and humidity sensors in the form of an analog signal and transmits it to the central processing unit 131. The analog output function unit 137b (hereinafter referred to as an 'AO function unit') outputs a control signal in the form of an analog signal to a valve and a damper actuator. The digital input function unit 137c (hereinafter, referred to as a “DI function unit”) receives an operation state information such as a motor and a fan in the form of a digital signal and transmits it to the central processing unit (). The digital output function unit 137d (hereinafter referred to as a “DO function unit”) outputs a control signal for starting / stopping a fan and a motor in a digital form. In the present embodiment, the case in which the AI, AO, DI, and DO function units 137a, 137b, 137c, and 137d are included in the DDC 130 has been described, but may be included in a two-wire control module (not shown). The two-wire control module is described in detail below.

3 is a diagram illustrating a configuration in which a DDC independently controls one air conditioner according to an embodiment of the present invention.

2 and 3, the AI function unit 137a is connected to the air supply temperature / humidity sensors 11 and 12, the ventilation temperature / humidity sensors 13 and 14, and the room temperature / humidity sensor 15 to be measured. The value may be input and provided to the CPU 131. The DI function unit 137c is connected to the air filter sensor 21 to receive the information on the air clean state in the form of a digital signal, but is connected to the smoke detection sensor 51 to receive the smoke generation information in the form of a digital signal. The processing unit 131 may be provided. The AO function unit 137b may be connected to the air supply damper actuator 31, the mixed damper actuator 32, and the exhaust damper actuator 33 to transmit an analog control signal to control the amount of air input / output. In addition, the AO function unit 137b may be connected to the cooling valve actuator 22, the heating valve actuator 23, and the humidification valve actuator 24 to transmit an analog control signal to adjust the valve opening and closing degree. The DO function unit 137d is connected to the start / stop devices 41 and 42 of the air supply fan motor and the ventilation fan motor to transmit a digital control signal to control the start and stop of the fan motor. The AI, AO, DI, and DO function units 137a, 137b, 137c, and 137d can control the inputs and outputs of the resistance, current, and voltage of the control target device 140. In FIG. 3, a case in which the building equipment is an air conditioner has been described as an example, but it can be applied to other types of building equipment.

On the other hand, when the DDC controls one air conditioner as described above, the wiring and piping can be relatively simple, but when the DDC controls a plurality of air conditioners, the wiring with the air conditioners located on different floors becomes complicated. There may be a problem that makes installation difficult. For example, a DDC capable of accommodating and controlling 96 control points can control about 5 to 6 air conditioners. Therefore, when building a building control system in a conventional manner, a complicated wiring of about 180 lines from an air conditioner located on another floor to a DDC may be required.

Hereinafter, a method for simplifying the wiring between the DDC 130 and the control target device 140 will be described.

4 is a diagram illustrating a configuration in which a DDC controls a control target device through a two-wire control module according to another embodiment of the present invention.

4, the DDC 130 is a two-wire control module (150a, 150b, 150c, ..., 150n) and a two-wire DC power line communication method (hereinafter referred to as "two-wire communication method") Is connected to transmit and receive control signals. Here, the 2-wire communication method means a method of transmitting and receiving a communication signal Hi (+) / Lo (-) superimposed on the DC power supply.

The two-wire control module 150a, 150b, 150c, ..., 150n includes at least one of AI, AO, DI, and DO function units 137a, 137b, 137c, and 137d to control the control signal transmitted from the DDC 130. Output to the control target device 140, or transfers the measured value input from the control target device 140 to the DDC (130). Two-wire control modules 150a, 150b, 150c, ..., 150n are provided on the control target device 140 side.

As shown in FIG. 4, the DDC 130 is connected to the two-wire control module 150a by two wires, and the two-wire control module 150a is connected to another two-wire control module 150b. If the automatic building equipment control system 100 is configured, it is much simpler and more efficient in wiring and piping than directly connecting both the DDC 130 and the control target device 140 individually.

5 is a view showing in more detail that the DDC and the two-wire control module of Figure 4 is connected in a two-wire communication method. In FIG. 4, for convenience of description, the DDC 130 shows only components required for two-wire communication with the two-wire control module 150a.

The DDC 130 includes a power communication filtering unit 138, a noise filter unit 139, a power supply unit 132, a communication unit 133, and a central processing unit 131.

The power supply unit 132 generates an operating power source (DC 24V) using an AC power source (AC 220V) applied from the outside.

The communication unit 133 includes a transmission / reception unit 133a and a transmission / reception polarity dual switching unit 133b.

The communication unit 133 converts the communication signal generated by the central processing unit 131 into a form capable of sending a 2Wire, which is a transmission link, or processes the communication signal received from the 2Wire by the central processing unit 131. Convert to a form that can be done. Transmitting / Receiving Polarity The dual switching unit 133b functions to configure a 2-wire communication network regardless of the electrical polarity (+/−) of a communication signal transmitted and received through a 2-wire.

The power communication filtering unit 138 superimposes the communication signal and power transmitted from the communication unit 133 and the power supply unit 132 and transmits the power to the control target device 140 through 2 wires, and conversely, the control target device 140. ) Separates communication signal transmitted overlapping with power through 2 wires.

The noise filter unit 139 removes noise components included in the communication signal and the power supply.

The two-wire control module 140 includes a power communication filter 138, a noise filter 139, a communication unit 133a, a DC power regulator 154, a DC / DC converter 152, a CPU 151 and AI, AO, DI, and DO function unit 157 is included.

The power communication filtering unit 158, the noise filter unit 159, and the communication unit 153 perform the same functions as the power communication filtering unit 138, the noise filter unit 139, and the communication unit 133 of the DDC 130. . The DC power regulator 154 processes the power separated from the communication signal through the power communication filtering unit 158 and the noise filter unit 159 as a DC power of a constant size regardless of the transmission / reception polarity. The DC / DC converter 152 converts the DC power of a size suitable for use in the 2-wire control module 150a itself.

The CPU 151 transmits the communication signal input from the communication unit 153 to the AI, AO, DI, and DO function unit 157 to control the controlled device, and conversely, the AI, AO, DI, and DO function units. The communication signal transmitted from 157 is processed in the opposite direction through the communication unit 153 and transmitted to the DDC 130.

The AI, AO, DI, and DO function unit 157 includes at least one of an AI function unit, an AO function unit, a DI function unit, and a DO function unit, and controls the control signal transmitted from the DDC 130 to be controlled. ) Or the status information or measured value transmitted from the control target device 140 to be input to the DDC (130).

In the present embodiment, the configuration in which the power supply unit 132 is included in the DDC 130 has been described. However, the power supply unit 132 may be accommodated externally and configured to include a DC power regulator and a DC / DC converter.

Although the preferred embodiment of the present invention has been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

As described above, according to the present invention, the building facility manager has an advantage of conveniently controlling and monitoring the controlling device directly from the direct digital controller.

In addition, even before the central monitoring system is installed, it is possible to perform construction while checking whether the site control equipment is properly installed and operated through a digital controller, thereby reducing the inconvenience of having to find and repair a wrongly installed part after construction. There is this.

In addition, by directly connecting the digital controller and the field control device through the two-wire DC power line communication method, piping and wiring is simplified, there is an advantage that the installation cost and maintenance cost is reduced.

Claims (7)

A control target device constituting the building facility; And, A direct digital controller controlling the control target device based on a control command and a set value input from an external device, and processing and displaying the operation state information and the measured value transmitted from the control target device; Including, The direct digital controller, An input unit to receive the control command and a set value; A display unit which displays a menu screen for receiving the control command and a set value, and displays information on an operation state and a measured value of the control target device; And, Generate a control signal for controlling the control target device based on the control command and the set value input from the keypad, and process the operation state information and the measured value transmitted from the control target device to be displayed on the display unit. A central processing unit executing a predetermined control program to perform a function; Building equipment automatic control system comprising a. The method of claim 1, The direct digital controller, An analog output function for outputting the control signal to the control target device in analog form, a digital output function for outputting the control signal to the control target device in digital form, and an analog input for receiving the measured value in analog form And at least one of a function unit and a digital input function unit for receiving the operation state information in a digital form. The method of claim 1, Connected to the direct digital controller by a 2-wire DC power line communication method, An analog output function for outputting the control signal to the control target device in analog form, a digital output function for outputting the control signal to the control target device in digital form, and an analog input function for receiving the measured value in analog form A two-wire control module including at least one of a digital input function unit and a digital input function unit for receiving the operation state information in a digital form; Building equipment automatic control system characterized in that it further comprises. The method of claim 2 or 3, A manager computer for centrally controlling the direct digital controller; And, A network controller for interfacing two-way communication between the manager computer and the direct digital controller; More, The direct digital controller includes a communication unit for communicating with the manager computer; Building equipment automatic control system characterized in that it further comprises. An input unit for receiving a control command and a setting value for controlling a control target device constituting a building facility; A display unit which displays a menu screen for receiving the control command and a set value, and displays information on an operation state and a measured value of the control target device; And, Generate a control signal for controlling the control target device based on the control command and the set value input from the keypad, and process the operation state information and the measured value transmitted from the control target device to be displayed on the display unit. A central processing unit executing a predetermined control program to perform a function; Direct digital controller for automatic control of building equipment comprising a. The method of claim 5, An analog output function for outputting the control signal to the control target device in analog form, a digital output function for outputting the control signal to the control target device in digital form, and an analog input function for receiving the measured value in analog form And a digital input function unit for receiving the operation state information in a digital form. The method of claim 5, An analog output function unit for outputting the control signal to the control target device in an analog form, a digital output function unit for outputting the control signal to the control target device in a digital form; A two-wire control module comprising at least one of an analog input function unit for transmitting to a digital controller and a digital input function unit for receiving the operation state information in a digital form and transmitting the digital signal to the direct digital controller. Direct digital controller for automatic control of building equipment, characterized in that it is.

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