JP2681149B2 - Data communication system for management of thermal equipment such as boilers - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a thermal equipment management data communication system for automatically maintaining and managing thermal equipment such as a boiler and a refrigerator using a public communication line. It is about. [Prior Art] In a commercial thermal device such as a steam boiler, the stoppage of the device due to an abnormality (failure) leads to a stoppage of the business.
Maintenance and management will be performed so as not to stop as much as possible, and in the worst case, urgent and appropriate repair is required. For this reason, in this type of equipment, regular maintenance / management and maintenance / management in case of an abnormality are carried out in combination. A system supporting such regular maintenance / management and abnormal maintenance / management is proposed in Japanese Patent Laid-Open No. 61-177133. According to this conventional example, an abnormality alarm signal and related measurement data are transmitted from the device side to the center device, and the center device side takes measures against the abnormality based on the abnormality alarm signal and the measurement data, and accurately determines the abnormality mode. It is configured so that maintenance and management can be carried out appropriately in the event of an abnormality. However, in this conventional example, neither the device side nor the center side has a function of detecting and outputting a symptom of a failure that does not lead to the stop of the device. It was not a suitable system in terms of management. [Problems to be Solved by the Invention] In view of the above problems, an object of the present invention is to provide a thermal equipment management data communication system suitable for maintenance / management that prevents the thermal equipment from being stopped. Is. [Means for Solving the Problems] The present invention is directed to various sensors for detecting an operating state of a heating device, a control unit for controlling the operation of the heating device based on signals from these sensors, a display panel or a print. The thermal equipment is provided with a device, and the control unit and the management device of the management station 4 located at a remote place are connected by a public communication line through a data communication coupling means capable of automatically sending and receiving data. Based on the data obtained by various sensors and the preset judgment conditions, when a sign of a failure that is not enough to stop it in the thermal equipment is detected, a signal near the failure is automatically sent to the management equipment. The control unit is provided with a function of transmitting a signal and outputting the signal to the display panel or the printing device. [Embodiment] A preferred embodiment of the present invention will be described below with reference to the drawings. A boiler 2 as a heat device is installed at the facility site 1. The boiler 2 includes a control unit 3 for operation control. A management device 5 such as a computer is installed in a management station 4 in a remote place. The management device 5 is connected to the control unit 3 by a public communication line 6. The control unit 3 has a communication function and can automatically send and receive data from the control unit 3 to the management device 5 and from the management device 5 to the control unit 3 via the data communication coupling means 7. 8 is a telephone, 9
Is a telephone exchange. As the data communication coupling means 7, a modem and
Use NCU or a modem telephone that can make and receive calls automatically, which has become popular recently. RS23 is used as the connecting line 10 for connecting the control unit 3 and the data communication coupling means 7.
2C or optical converter is used. In this way, each facility site 1 and management station 4
When connecting and the public communication line 6, a plurality of management stations 4 are provided for a certain number of boilers, and a general management station 11 that supervises these management stations 4 is provided.
May be installed (see FIG. 2). The general management device (not shown) of the general management station 11 and the management device 5 of each management station 4 are connected by the public communication line 6 to construct a network of one data communication system as a whole. In FIG. 3, an oil pump OP, an oil heater OH, and a solenoid valve 13 are provided in the fuel supply pipe 12, and a water supply pipe 14 is provided.
A water supply pump WP and a check valve 15 are respectively installed therein. The boiler 2 shown in the figure includes a burner 16, a blower 17,
It is equipped with a water level detector 18 and a chimney 19. As various sensors for detecting the operating state of the boiler, a pressure sensor 20, a flame detection sensor 21, a water level detection sensor 22, an exhaust gas temperature sensor 23, an oil temperature sensor 24, a water pipe temperature sensor 25, a water supply temperature sensor 26, etc. are provided.
The signal from each sensor is sent to the control unit 3 by a signal line indicated by a broken line and used as data for selecting the operating condition. The data obtained from each sensor is compared and calculated by the control unit 3 and stored. Then, when operating data is sent to the management device 5 according to an instruction from the management device 5 or when a boiler abnormality is predicted or detected, the data is sent to the management device 5 each time. 4 and 5 show examples of control flowcharts in the management device 5 and the control unit 3,
The management device 5 collects the operation data of the boiler 2 of the facility site 1 through the public communication line 6 as necessary,
You can create graphs and datasheets.
In addition, the control unit 3 sends data at any time in response to a request from the management device 5. When it is judged that there is an abnormality as a result of analyzing the sampled data,
The alarm is sent immediately and the data is automatically transmitted to the management device 5 to notify the abnormality. At that time, if the boiler is provided with an appropriate display panel or printing device, the boiler manager at the facility site can easily obtain the data sheets as daily and monthly reports, and send the necessary information from the management station 4. It can also be displayed. Moreover,
It is also possible to determine the optimum operating condition of each boiler from the obtained data, send it as operation command information from the management device 5 to the control unit 3, and perform control according to the optimum operating condition. In the above-mentioned configuration, the control unit 3 determines whether the boiler is abnormal or not based on the data obtained by various sensors. Specifically, in a situation where the boiler is stopped, a predetermined determination condition is set in advance. Before they arrive, anticipate any anomalies and prevent the boiler from reaching a complete failure condition. That is, when the value of the measured data exceeds the preset range based on the determination condition set for each data, an alarm is issued to indicate that the failure is approaching. Also, by analyzing the increasing tendency and decreasing tendency of the sampled data, it is possible to predict when the failure is likely to occur. For example, the output of the flame detection sensor 21 is several tens of percent below the normal value.
If it decreases more than the above, it is judged that the ignition is near due to sensor deterioration. Also, when the water pipe temperature sensor 25 provided in the water pipe detects a temperature above a set level at a certain constant pressure, the scale thickness attached to the inner surface of the water pipe exceeds the limit value, and the boiler efficiency decreases or the can is heated due to overheating. It judges that it is close to a puncture and issues an alarm. If the ON time of the water supply pump becomes longer, it is judged that the water supply capacity has decreased, and it is possible to judge the water supply pump capacity by monitoring the ON time. By interposing the pressure sensor 20 'between the pump WP in the water supply pipe 14 and the check valve 15, both of the water supply line pressure and the can internal pressure can be detected. In other words, due to the action of the check valve 15, the pressure sensor 20 'receives the internal pressure of the can when the water supply pump is ON, and the water supply line pressure when the water supply pump is OFF, so it is necessary to determine whether the water supply pump is ON or OFF. Detect the pressure inside the can. [Effect of the Invention] According to the present invention configured as described above, the control unit of the thermal device is configured to stop the thermal device based on the data obtained by various sensors and the preset determination condition. When a symptom of failure that does not reach is detected, a signal near the failure is automatically transmitted to the management device,
Since it is output to the display panel of the thermal equipment or the printing equipment, it is possible to appropriately perform maintenance and management to prevent the thermal equipment from failure based on the information about the failure.
It is possible to avoid the abnormal situation of stopping the thermal equipment as much as possible. In addition, the person engaged in maintenance and management can know the information about the failure near the maintenance equipment side and the management equipment side at the time of regular maintenance and management, etc., before sending to the installation site of the heating equipment. The management device can be sent after grasping information about the failure in advance, and even if it is not grasped in advance, information about the failure near the site can be obtained without communicating with the management device and extracting the information. It is possible to understand and perform maintenance management corresponding to this. Further, since the control unit of the thermal device determines whether the failure is approaching and the signal indicating that the failure is approaching is transmitted to the management device, the original data for making the determination is transmitted to the management device side. There is no need, and the amount of data transmitted and the frequency of transmission from the thermal device to the management device can be reduced. In addition, even when communicating with a large number of different types of thermal equipment and management equipment, it is necessary to input to the management equipment a judgment criterion for outputting a near failure signal corresponding to each thermal equipment. Since the management device does not need to determine that the failure is approaching, the management device has a great effect such as reducing the amount of work.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a data communication system of the present invention, FIG. 2 is a network diagram in which the data communication system of the present invention is combined, and FIG. FIG. 4 is a schematic front view of a boiler as a heat device using the data communication system of FIG. 4, FIG. 4 is a flowchart of control of management equipment in the data communication system of the present invention, and FIG.
The figure is a flowchart of the control of the control unit in the data communication system of the present invention. 1 ... Facility site, 2 ... Thermal equipment (boiler) 3 ... Control unit, 4 ... Management station 5 ... Management equipment, 6 ... Public communication line 7 ... Data communication coupling means, 8 ... Telephone 9 ... Telephone switch, 10 ... Connecting line 11 ... General management station

   ────────────────────────────────────────────────── ─── Continuation of front page                   (56) References JP-A-62-223504 (JP, A)                 JP-A-57-10896 (JP, A)                 JP-A-61-177133 (JP, A)                 JP-A-57-118454 (JP, A)

Claims (1)

(57) [Claims] The thermal device 2 includes various sensors for detecting the operating state of the thermal device 2, a control unit 3 for controlling the operation of the thermal device 2 based on signals from these sensors, and a display panel or a printing device. The control unit 3 and the management device 5 of the management station 4 at a remote place are connected by a public communication line 6 via a data communication coupling means 7 capable of automatically sending and receiving data, and are obtained by the various sensors described above. When a symptom of a failure that does not occur until the thermal equipment 2 is stopped is detected based on the data and the preset judgment conditions, a signal indicating a failure is automatically transmitted to the management equipment 5 and Data for managing thermal equipment such as a boiler, characterized in that the control unit 3 is provided with a function of outputting to the display panel or printing equipment. Shin system.