RU90591U1 - AUTOMATED HEATING MODULE MODULE - Google Patents

Abstract

The module for the automated control of the heating riser, containing nodes for receiving data from temperature sensors and flow sensors, associated with a signal processing device, including an analog-to-digital converter, a comparison circuit, and an interface connecting the processing device with the command transmission line to the actuator, characterized in that a heat meter is additionally introduced into it, the input of which is connected to the output of the processing device, connected to the output of the heat meter in series connected block programs and a proportional-integral-differential controller connected to the output by the actuator, as well as a non-volatile memory device connected to the second output of the heat meter, connected via an interface to the data line.

Description

The inventive module for the automated control of the heating riser is designed to work as a component of automated systems for accounting and management of heat supply of buildings and structures.

The scope of the module is a system of technological and commercial metering, automated control of technological processes at housing and communal services, as well as objects of other industries, in the conditions of round-the-clock operation.

Known automated information system for monitoring and controlling the operation of a heating boiler with hot water boilers, described in the same patent of the Russian Federation No. 2340835 for class. F24D 19/10, z. 01/09/2007, op. 12/10/2008.

An automated information system includes internal and external heating circuits, while the internal circuit includes hot water boilers with gas water heaters, heat exchangers and network pumps with the output through heat exchangers to an external circuit with network pumps and a heating system with control of the network parameters using gas burners and make-up pumps.

Pressure sensors are located at the inlet and outlet of the pump, temperature sensors are installed in the forward and return pipelines. The signals from the pressure and temperature sensors are fed to microprocessor controllers, the signals from which are fed to a computer for processing and storage, where the released heat is calculated from them. Programmed control of the supplied heat is provided in accordance with the program embedded in the microprocessor controller. Measurement and regulation of flow is carried out by a pumping unit containing pumps of various capacities.

A disadvantage of the known system is its complexity, due to the presence of two control loops.

A known system for automatically controlling the heating of a building, taking into account climatic factors, is described in the same patent of the Russian Federation No. 2247422 in class. G05D 23/19, z. 05/13/04, op. 02/27/05.

The known system comprises a local controller, an immersion temperature sensor for the coolant and outdoor and indoor air temperature sensors located respectively on one of the exterior facades of the building and in the room on the side of this facade, while the control valve connected to the external heating networks is installed on the pipes, and a circulation pump and between them a jumper connecting the direct and return pipelines, and the actuator of the control valve and the electric drive of the circulation pump are connected to The processing device, made in the form of a local controller, also has additional control valves, temperature sensors for external and internal air, an additional processing device in the form of an additional controller and hydraulic distributors located after the circulation pump with branches of the heating system along the building facades with additional control valves , while the temperature sensors of the external and internal air through a communication adapter are connected to a digital commune munication port to an additional controller, connected to the digital communication port of the local controller. In this case, the signals from the temperature sensors arriving at the inputs of the processing devices - controllers are converted into digital ones. Then the control command from the processing device - the local controller is converted into an electrical signal and fed to the actuator. In an additional processing device, the controller, the temperatures of the sensors from different facades are compared, the lowest temperature is detected and a command is issued for the processing device, the local controller, to switch it to a control algorithm taking into account the temperature of the coldest facade.

A disadvantage of the known system is its complexity, due to the need for a frontal automatic temperature control and leading to the presence of a second processing device, the installation of many temperature sensors, the presence of many supply and return pipelines. A large number of elements included in the system reduces the reliability of its operation. At the same time, the operational capabilities of the system are limited, as its processing devices, executed on controllers, perform only the functions of converting signals, comparing them with each other and issuing commands to actuators. They do not carry out either data storage or calculation of the amount of energy consumed.

The objective of the proposed module is to expand the operational capabilities of the circuit while increasing the reliability of its operation.

The problem is solved in that in the module for the automated control of the heating riser, which contains nodes for receiving data from temperature sensors of flow sensors, connected to a signal processing device, including an analog-to-digital converter, a comparison circuit, and an interface connecting the processing device with the command transmission line to the executive mechanism, ACCORDING TO THE USEFUL MODEL, a heat calculator is added to it, the input of which is connected to the output of the processing device, connected to the output of the heat calculator The programmer is connected in series with a proportional-integral-differential controller connected by an output to the actuator, as well as a non-volatile memory device connected to the second output of the heat meter, connected via an interface to a data transmission line.

The introduction of an additional heat meter into the module together with the presence of a chain associated with the outputs of the heat meter from the program setting unit and the proportional-integral-differential (PID) controller, as well as a non-volatile archive, makes it possible to determine various parameters of the heat carrier - its temperature, temperature difference, enthalpy, enthalpy difference, volumetric and mass flow rates of water and heat, then, in accordance with the program specified by the program setting block according to the results of the operation of the heat meter, with the help of PID controller and actuator, if necessary, make adjustments to the operation of the heat riser and save the data that extends the operational capabilities of the device and with a very simple circuit module increases its reliability.

The technical result - the ability to calculate various parameters of the coolant and make accurately calculated adjustments to the work of the riser, as well as saving data in the archive.

The inventive module has a novelty in comparison with the prototype, differing from it by the presence of such essential features as the presence of a heat meter, the input of which is connected to the output of the processing device, connected to the output of the heat meter of the series-connected program task unit and the PID controller, connected by the output to the actuator, as well unit non-volatile data archive, connected via an interface with a data transmission line, which together ensure the achievement of a given result.

The inventive module can be widely used in housing and communal services, and therefore meets the criterion of "industrial applicability".

The utility model is illustrated by drawings, which are presented on:

- figure 1 is a functional diagram of a module for automated control of a heating riser;

- figure 2 - table 1 (types of sensors and measuring range);

- figure 3 - table 2 (parameters of the connected counters);

- figure 4 - table 3 (calculated parameters of the archive);

- figure 5 - table 4 (types of archives).

The inventive module for the automatic control of the heating riser (Fig. 1) contains nodes 1 for receiving data from temperature sensors in the direct and return pipelines and nodes 2 for receiving the flow in the direct and return pipelines associated with the inputs of the input signal processing device 3. It also includes a calculator 4, the input of which is connected to the output of the input signal processing device 3, connected to the output of the calculator 4, sequentially connected to the program setting unit 5 and the PID controller 6. The output of the PID controller 6 is connected via an connector 7 to the actuator, and the second output of the calculator 4 is connected to a non-volatile memory device 8, connected via interface 9 to the data line.

The purpose and implementation of the nodes and blocks of the module is as follows.

The nodes 1 and 2 of the data reception contain connectors for connecting the outputs of the sensors to the device 3 processing the input signals.

Device 3 is used to process input signals from temperature and flow sensors, which contains elements for analog-to-digital conversion of signals, the implementation of the filtering, scaling, and correction of processing results (otherwise, calibrating the measurement of input values of temperature and flow rate by reference measures).

The heat meter 4 is used to determine various parameters of the coolant - temperature, temperature difference, enthalpy, difference of enthalpies, volumetric flow rate, mass flow rate, volume, mass, heat.

Block 5 is designed to set the programs of the module for automated control of the heating riser depending on the time of year. The temperature difference supported by the module for automated control of the heating riser is different for different seasons and is recorded in the program memory, but can be adjusted depending on the operating conditions by the user.

The proportional-integral-differential (PID) controller 6 serves to optimize the control mode - to reduce the overshoot of the temperature difference of the heating risers and to quickly reach the set value for various system disturbances, causing the adjustable parameter to deviate from the set value. The control signal from the proportional-integral-differential controller 6 is fed to the actuator control mechanism of the control valve of the heating riser.

Connector 7 is used to connect the actuator motor.

The non-volatile memory device 8 serves as an archive and is intended for storing all measured and calculated values and for their further transfer via a wired interface 9 (RS-485), first to a home concentrator, and then to a control room for controlling the heating conditions of buildings.

Structurally, the module is a monoblock design. The module includes a housing for wall mounting and a device board with display elements to reflect the operating status of the device, sensors and network (not shown in the drawing).

This device can be operated in difficult conditions of the basement. This means that a sharp temperature difference from minus 5 ° С to + 50 ° С is possible, with elements of strong dustiness of the room, high humidity, up to the direct hit of water jets on the device body and the formation of mold. Reliable operation of the device elements under such conditions is possible only in a sealed enclosure. In terms of protection against external solid objects and water, the module must comply with IP 55 according to GOST 14254.

To mount the device on the wall of the building, it is necessary that the body of the device has mounting holes. In this case, the holes for fixing to the wall and fixing the cover should be outside the sealed area.

On the upper and lower walls of the device are hermetic inputs for inputting power circuits, sensors and interface. This ensures sealing of the supply cables.

The board contains all the elements of the electronic circuitry of the device, which are responsible for measuring the input signals, calculating and archiving the output data, as well as for indicating the operating status of the device, sensors and network.

The general principle of enclosure sealing imposes some restrictions on the connection of external circuits to the device. The most appropriate option is to connect the wires inside the device using connectors with screw fasteners.

The inventive module operates as follows.

Through the receiving nodes 1 and 2 (connectors), the signals from the temperature and flow sensors are fed to the input signal processing device 3, and from its output to the heat calculator 4. Based on the obtained values, the heat calculator 4 calculates the desired temperature values and also performs all arithmetic operations to calculate output parameters.

The whole cycle of measurement, calculation and regulation is carried out with a frequency of 1 time per second, which allows you to very quickly monitor changes in temperature in the pipelines and make quality control.

All these values are accumulated and stored in the non-volatile memory device 8. Also, device 8 is necessary for storing calibration coefficients and settings in non-volatile memory.

Using interface 9 (RS-485), any external device that is the master in the network can read the value of any calculated parameter, or a data archive (hourly, daily, monthly, event archive).

To perform the regulation functions by the module, a gear motor is connected to connector 7, which controls the valve position, thereby regulating the volume of flowing fluid in the pipeline.

The nodes of the network interface and engine control are 100% galvanically isolated by direct current, providing reliable protection of the measuring path from the penetration of external noise from the network, as well as interference from the valve control motor. This greatly improves the metrological characteristics of the device, increases its resistance to electromagnetic interference.

In general, the module is intended for:

- measuring the output signals of the primary pulse converters (PI) and converting them into the corresponding physical quantities, measured PI;

- calculation of volumetric and / or mass flow rate of water using flow sensors (quantity) with standard number-pulse outputs;

- calculation of the amount of thermal energy in closed heat supply systems and in individual pipelines;

- automated balancing of the thermal regime of the riser;

- measurement of temperature of direct and return heat carrier.

The module has the following specifications.

The module has two inputs for connecting resistance thermal converters in a four-wire circuit. The resistance of each communication line, distributed along the length of the communication line, is not more than 25 ohms. The types of sensors and the measuring range are shown below in table 1 (figure 2).

The module has two pulse inputs for connecting flow rate meters installed in the supply or return pipelines with the number of pulse outputs.

The type of meter outputs is “dry contact” or “open collector”.

The parameters of the connected meters are shown in table 2 (figure 3).

The price of one output pulse of the sensor is selected from the series: 0.25, 0.5, 1.0, 2.5, 5.0, 10, 25, 50, 100.

The magnitude of the load currents through the nodes of the number of pulse outputs connected to the corresponding inputs of the flowmeter module (counters) does not exceed 2 mA.

The module provides measurement of all input signals of the sensors at least 1 time per second.

The module saves in non-volatile memory (archive) the following calculated parameters, shown below in table 3 (figure 4).

The module provides storage in non-volatile memory of the following types of archives, shown below in table 4 (figure 5).

The module provides, upon request, the values of current parameters:

- water temperatures in the supply and return piping, ° С and KJ / kg;

- enthalpy of water in the supply and return piping, KJ / kg;

- differences in temperature in the supply and return piping, ° C;

- differences in enthalpy values in the supply and return piping, KJ / kg;

- reduced to hour value of the volumetric flow rate of water, m3 / h;

- reduced to the hour value of the mass flow of water, kg / h;

- reduced to the hour value of the consumption of heat, Gcal / h;

- the number of read pulses for each of the number of pulse inputs at the time of the request.

The module has two pulse outputs for controlling the balancing valve of the thermal mode of the riser. The electrical parameters of the pulse outputs are as follows:

- the maximum value of the output current is 1 A;

- alternating voltage of pulse outputs - 24 V.

To balance the thermal regime of the riser, a control valve is used. A gear drive with Upit = ~ 24 V is used as an actuator.

The module works from a source of direct or alternating current with a voltage of (20 ± 10) V.

The power consumption of the module from a 24 V AC network with a frequency of 50 Hz does not exceed 0.5 VA.

The module is resistant to dips and power outages lasting up to 0.5 s.

To power the gearbox of the balancing valve, an alternating voltage (24 + 2.4) V and (24-3.6) V with a frequency of 50 Hz is used. The rated power of the power supply is 2.2 VA.

The built-in LED indicator provided in the module, consisting of four light indicators, informs about the following situations:

- loss of connection with the home concentrator (use a two-color LED, green light - communication is normal, red light - communication is lost);

- malfunction or breakage of temperature sensors (one red LED per sensor);

- breakage of the coolant flow sensor in the main (according to the metering scheme) pipeline (red LED);

The module provides communication with a home hub or personal computer (using the service software) via the RS-485 interface using the Modbus-RTU protocol.

The protocol supports the ability to transfer all current and archive module parameters listed above.

The data transfer rate through the RS-485 interface is set using the service program. The speed value is selected from the range: 2400, 4800, 9600, 19200, 38400, 57600, 115200 bps.

The module configuration, calibration and verification procedures are carried out through the interface (RS-485) using the technological service software.

Compared with the prototype, the inventive module for automatic control of the heating riser has wider operational capabilities and is more reliable in operation.

Claims (1)

A module for automated control of the heating riser, containing nodes for receiving data from temperature sensors and flow sensors, connected to a signal processing device including an analog-to-digital converter, a comparison circuit, and an interface connecting the processing device to the command transmission line to the actuator, characterized in that a heat meter is additionally introduced into it, the input of which is connected to the output of the processing device, connected to the output of the heat meter in series connected block programs and a proportional-integral-differential controller connected to the output by the actuator, as well as a non-volatile memory device connected to the second output of the heat meter, connected via an interface to the data line.