CN109737797B - Heat exchanger control system and method - Google Patents
Heat exchanger control system and method Download PDFInfo
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- CN109737797B CN109737797B CN201811514050.6A CN201811514050A CN109737797B CN 109737797 B CN109737797 B CN 109737797B CN 201811514050 A CN201811514050 A CN 201811514050A CN 109737797 B CN109737797 B CN 109737797B
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Abstract
The disclosure provides a heat exchanger control system and method, and relates to the technical field of control. The heat exchanger control system and the method provided by the disclosure acquire the outlet water temperature of the first cooling medium of the heat exchanger through the outlet water temperature sensor, convert the outlet water temperature of the first cooling medium and transmit the converted outlet water temperature to the controller, the controller compares the outlet water temperature of the converted first cooling medium with a preset temperature value after receiving the converted outlet water temperature of the first cooling medium to obtain a comparison result, performs PID (proportion integration differentiation) operation on the comparison result after obtaining the comparison result to obtain an operation result, converts the operation result and transmits the operation result to the regulator, so that the regulator obtains regulation information according to the converted operation result, regulates the flow of the second cooling medium of the heat exchanger according to the regulation information, further regulates the temperature of the first cooling medium, realizes temperature regulation of the heat exchanger, and controls the reaction rapidly, the adjusting time is short.
Description
Technical Field
The disclosure relates to the technical field of control, in particular to a heat exchanger control system and method.
Background
The heat exchanger is an energy-saving device for transferring heat between materials between two or more fluids with different temperatures, and is used for transferring heat from the fluid with higher temperature to the fluid with lower temperature to make the temperature of the fluid reach the index specified by the process so as to meet the requirements of process conditions, and is also one of main devices for improving the utilization rate of energy. At present, the reaction of a heat exchanger control system is delayed, and the adjusting time is longer.
Disclosure of Invention
In view of the above, the present disclosure provides a heat exchanger control system and method.
The heat exchanger control system provided by the disclosure is applied to a heat exchanger and comprises a water outlet temperature sensor, a controller and a regulator; the outlet water temperature sensor, the controller and the regulator are respectively and electrically connected with the heat exchanger.
The outlet water temperature sensor is used for acquiring the outlet water temperature of a first cooling medium of the heat exchanger, converting the outlet water temperature of the first cooling medium and transmitting the converted outlet water temperature to the controller.
The controller is used for receiving the water outlet temperature of the first cooling medium after conversion processing, and comparing the water outlet temperature of the first cooling medium after conversion processing with a preset temperature value to obtain a comparison result.
And the controller is used for carrying out PID operation on the comparison result to obtain an operation result, and transmitting the operation result to the regulator after conversion processing.
The regulator is used for obtaining regulation information according to the operation result after conversion processing, and regulating the flow of the second cooling medium of the heat exchanger according to the regulation information so as to regulate the temperature of the first cooling medium.
Further, the heat exchanger control system also comprises an A/D converter; the water outlet temperature sensor is electrically connected with the A/D converter, and the A/D converter is electrically connected with the controller.
The water outlet temperature sensor is used for acquiring the water outlet temperature of the first cooling medium and converting the water outlet temperature of the first cooling medium into a first analog quantity signal.
The A/D converter is used for converting the first analog quantity signal into a digital quantity signal to obtain the water outlet temperature of the first cooling medium after conversion processing, and transmitting the water outlet temperature of the first cooling medium after conversion processing to the controller.
Further, the heat exchanger control system also comprises a D/A converter; the controller is electrically connected with the D/A converter, and the D/A converter is electrically connected with the regulator.
And the controller is used for carrying out PID operation on the comparison result to obtain an operation result and transmitting the operation result to the D/A converter.
The D/A converter is used for converting the operation result into a second analog quantity signal to obtain the operation result after conversion processing, and transmitting the operation result after conversion processing to the regulator.
Further, the heat exchanger control system also comprises a display and an A/D converter, and the display is connected with the controller.
The regulator is also used for feeding back the regulating information to the A/D converter after the flow of the second cooling medium of the heat exchanger is regulated according to the regulating information.
And the A/D converter is used for converting the adjusting information and then sending the information to the controller.
The controller is used for sending the converted adjusting information to the display so that the display displays the converted adjusting information.
Furthermore, the heat exchanger control system also comprises a water inlet pressure transmitter, a water outlet pressure transmitter, a water inlet temperature sensor and a flowmeter; the A/D converter is electrically connected with the water inlet pressure transmitter, the water outlet pressure transmitter, the flowmeter, the water inlet temperature sensor and the water outlet temperature sensor respectively.
Pressure transmitter, play water pressure transmitter, flowmeter, temperature sensor and the play water temperature sensor of intaking are used for acquireing respectively first coolant's pressure of intaking, play water pressure, flow, the temperature of intaking and play water temperature will acquire respectively the pressure of intaking, play water pressure, flow, the temperature of intaking and the play water temperature of first coolant convert corresponding analog signal into, and transmit extremely the AD converter.
The A/D converter is used for respectively converting analog quantity signals corresponding to the water inlet pressure, the water outlet pressure, the flow, the water inlet temperature and the water outlet temperature of the first cooling medium into corresponding digital quantity signals and transmitting the digital quantity signals to the controller.
The controller is used for transmitting the received digital quantity signal to the display so as to enable the display to display.
The heat exchanger control method provided by the disclosure is applied to the heat exchanger control system, and the heat exchanger control system comprises an outlet water temperature sensor, a controller and a regulator; the outlet water temperature sensor, the controller and the regulator are respectively and electrically connected with the heat exchanger; the method comprises the following steps:
the water outlet temperature sensor obtains the water outlet temperature of a first cooling medium of the heat exchanger, and the water outlet temperature of the first cooling medium is converted and then transmitted to the controller.
The controller receives the water outlet temperature of the first cooling medium after conversion processing, and compares the water outlet temperature of the first cooling medium after conversion processing with a preset temperature value to obtain a comparison result.
And the controller performs PID operation on the comparison result to obtain an operation result, and the operation result is converted and then transmitted to the regulator.
And the regulator obtains regulation information according to the operation result after conversion processing, and regulates the flow of the second cooling medium of the heat exchanger according to the regulation information so as to regulate the temperature of the first cooling medium.
Further, the heat exchanger control system comprises an A/D converter, the effluent temperature sensor is electrically connected with the A/D converter, and the A/D converter is electrically connected with the controller; the step that the outlet water temperature sensor obtains the outlet water temperature of the first cooling medium of the heat exchanger, converts the outlet water temperature of the first cooling medium and transmits the converted outlet water temperature to the controller comprises the following steps:
the water outlet temperature sensor obtains the water outlet temperature of the first cooling medium and converts the water outlet temperature of the first cooling medium into a first analog quantity signal.
The A/D converter converts the first analog quantity signal into a digital quantity signal to obtain the water outlet temperature of the first cooling medium after conversion processing, and transmits the water outlet temperature of the first cooling medium after conversion processing to the controller.
Further, the heat exchanger control system comprises a D/A converter, and the heat exchanger control system also comprises a D/A converter; the controller is electrically connected with the D/A converter, and the D/A converter is electrically connected with the regulator; the step that the controller carries out PID operation on the comparison result to obtain an operation result, and the operation result is transmitted to the regulator after being converted comprises the following steps:
and the controller performs PID operation on the comparison result to obtain an operation result, and transmits the operation result to the D/A converter.
And the D/A converter converts the operation result into a second analog quantity signal to obtain an operation result after conversion processing, and transmits the operation result after conversion processing to the regulator.
Further, the heat exchanger control system also comprises a display and an A/D converter, wherein the display is connected with the controller; after the regulator obtains regulation information according to the operation result after the conversion processing, and regulates the flow rate of the second cooling medium of the heat exchanger according to the regulation information, the method further includes:
the regulator feeds back the regulation information to the a/D converter.
And the A/D converter converts the adjusting information and then sends the information to the controller.
And the controller sends the converted regulating information to the display so that the display displays the converted regulating information.
Furthermore, the heat exchanger control system also comprises a water inlet pressure transmitter, a water outlet pressure transmitter, a water inlet temperature sensor and a flowmeter; the A/D converter is respectively and electrically connected with the water inlet pressure transmitter, the water outlet pressure transmitter, the flowmeter, the water inlet temperature sensor and the water outlet temperature sensor; the method further comprises the following steps:
the water inlet pressure transmitter, the water outlet pressure transmitter, the flowmeter, the water inlet temperature sensor and the water outlet temperature sensor respectively acquire the water inlet pressure, the water outlet pressure, the flow, the water inlet temperature and the water outlet temperature of the first cooling medium, respectively convert the water inlet pressure, the water outlet pressure, the flow, the water inlet temperature and the water outlet temperature of the first cooling medium into corresponding analog quantity signals, and transmit the analog quantity signals to the A/D converter.
The A/D converter converts analog quantity signals corresponding to the water inlet pressure, the water outlet pressure, the flow, the water inlet temperature and the water outlet temperature of the first cooling medium into corresponding digital quantity signals respectively and transmits the digital quantity signals to the controller.
The controller transmits the received digital quantity signal to the display so as to enable the display to display.
The heat exchanger control system and the method provided by the disclosure acquire the outlet water temperature of the first cooling medium of the heat exchanger through the outlet water temperature sensor, convert the outlet water temperature of the first cooling medium and transmit the converted outlet water temperature to the controller, the controller compares the outlet water temperature of the converted first cooling medium with a preset temperature value after receiving the converted outlet water temperature of the first cooling medium to obtain a comparison result, performs PID (proportion integration differentiation) operation on the comparison result after obtaining the comparison result to obtain an operation result, converts the operation result and transmits the operation result to the regulator, so that the regulator obtains regulation information according to the converted operation result, regulates the flow of the second cooling medium of the heat exchanger according to the regulation information, further regulates the temperature of the first cooling medium, and realizes rapid temperature regulation of the heat exchanger, the control reaction is rapid, and the regulation time is short.
In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
To more clearly illustrate the technical solutions of the present disclosure, the drawings needed for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present disclosure, and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a block schematic diagram of a heat exchanger control system provided by the present disclosure.
Fig. 2 is another block schematic diagram of a heat exchanger control system provided by the present disclosure.
Fig. 3 is a schematic flow chart of a heat exchanger control method provided by the present disclosure.
Fig. 4 is another schematic flow chart of a heat exchanger control method provided by the present disclosure.
Fig. 5 is a schematic flow chart of a heat exchanger control method provided by the present disclosure.
Fig. 6 is a schematic flow chart of a heat exchanger control method provided by the present disclosure.
Fig. 7 is a schematic flow chart of a heat exchanger control method provided by the present disclosure.
Icon: 100-a heat exchanger control system; 11-a water outlet temperature sensor; 12-a water inlet temperature sensor; 13-a water inlet pressure transmitter; 14-a water outlet pressure transmitter; 15-a flow meter; a 20-A/D converter; 30-a controller; a 40-D/A converter; 50-a regulator; 60-a display; 200-heat exchanger.
Detailed Description
The technical solutions in the present disclosure will be described clearly and completely with reference to the accompanying drawings in the present disclosure, and it is to be understood that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The components of the present disclosure, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present disclosure, presented in the figures, is not intended to limit the scope of the claimed disclosure, but is merely representative of selected embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the disclosure without making creative efforts, shall fall within the protection scope of the disclosure.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The heat exchanger is an energy-saving device for transferring heat between materials between two or more fluids with different temperatures, and is used for transferring heat from the fluid with higher temperature to the fluid with lower temperature to make the temperature of the fluid reach the index specified by the process so as to meet the requirements of process conditions, and is also one of main devices for improving the utilization rate of energy.
At present, most heat exchanger control systems only acquire an outlet water temperature signal of a heat exchanger as a control point, the reaction of the control system is delayed, the adjustment time is long, the control system can only adapt to the control of a common temperature system, and the control of the temperature system with complicated time variation is difficult to deal with.
Based on the above research, the present disclosure provides a heat exchanger control system and method to improve the above problems.
Referring to fig. 1, the heat exchanger control system 100 provided by the present disclosure is applied to a heat exchanger 200, where the heat exchanger control system 100 includes an outlet water temperature sensor 11, a controller 30 and a regulator 50; the outlet water temperature sensor 11, the controller 30 and the regulator 50 are electrically connected to the heat exchanger 200, respectively.
The outlet water temperature sensor 11 is configured to obtain an outlet water temperature of the first cooling medium of the heat exchanger 200, perform conversion processing on the outlet water temperature of the first cooling medium, and transmit the converted outlet water temperature to the controller 30.
In the present disclosure, the first cooling medium is used to remove heat from the object to be cooled, and the first cooling medium may be, but not limited to, a fluid that can cool a substance, such as an aqueous solution, a saline solution, and an organic water solvent. Optionally, the first cooling medium of the present disclosure is an aqueous solution. The Controller 30 may be, but is not limited to, a Programmable Logic Controller (PLC), a single chip microcomputer, and other devices capable of realizing control, and optionally, the Controller 30 of the present disclosure is a Programmable Logic Controller, which is provided with a model number of siemens S7-200CPU-224XP CN.
The controller 30 is configured to receive the water outlet temperature of the first cooling medium after the conversion processing, and compare the water outlet temperature of the first cooling medium after the conversion processing with a preset temperature value to obtain a comparison result.
The controller 30 is configured to perform PID operation on the comparison result to obtain an operation result, and transmit the operation result to the regulator 50 after performing conversion processing on the operation result.
The regulator 50 may be, but is not limited to, an electric regulating valve, a pneumatic regulating valve, and a hydraulic control valve. Optionally, the regulator 50 of the present disclosure is an electrically-operated regulator valve, which is siemens VVF31.50-40+ SKD 60.
The regulator 50 is configured to obtain regulation information according to the operation result after the conversion processing, and regulate the flow rate of the second cooling medium of the heat exchanger 200 according to the regulation information, so as to regulate the temperature of the first cooling medium.
The adjustment information is opening information of the adjuster 50, and the adjuster 50 controls the opening thereof according to the opening information to adjust the flow rate of the second cooling medium of the heat exchanger 200, so as to adjust the temperature of the first cooling medium. In the present disclosure, the second cooling medium may be, but is not limited to, a fluid that can cool a substance, such as an aqueous solution, a saline solution, and an organic water solvent; the second cooling medium acts on the first cooling medium for adjusting the temperature of the first cooling medium.
Further, referring to fig. 2, the heat exchanger control system 100 further includes an a/D converter 20; the outlet water temperature sensor 11 is electrically connected with the a/D converter 20, and the a/D converter 20 is electrically connected with the controller 30.
The outlet water temperature sensor 11 is configured to obtain an outlet water temperature of the first cooling medium, and convert the outlet water temperature of the first cooling medium into a first analog signal.
After the outlet water temperature sensor 11 obtains the outlet water temperature of the first cooling medium, the outlet water temperature signal of the first cooling medium is converted into a standard 4-20mA current signal to obtain a first analog quantity signal, and the first analog quantity signal is transmitted to the a/D converter 20.
The a/D converter 20 is configured to convert the first analog quantity signal into a digital quantity signal, obtain an outlet water temperature of the first cooling medium after the conversion processing, and transmit the outlet water temperature of the first cooling medium after the conversion processing to the controller 30.
After receiving the first analog quantity signal, the a/D converter 20 converts the first analog quantity signal into a digital quantity signal, obtains the outlet water temperature of the first cooling medium after conversion processing, and transmits the outlet water temperature of the first cooling medium after conversion processing to the controller 30. In the present disclosure, the A/D converter 20 is model number Siemens S7-200EM 231.
Further, with continued reference to fig. 2, the heat exchanger control system 100 further includes a D/a converter 40; the controller 30 is electrically connected to the D/a converter 40, and the D/a converter 40 is electrically connected to the regulator 50. In the present disclosure, the D/A converter 40 is model S7-200EM 232.
The controller 30 is configured to perform PID operation on the comparison result to obtain an operation result, and transmit the operation result to the D/a converter 40.
The D/a converter 40 is configured to convert the operation result into a second analog signal, obtain a converted operation result, and transmit the converted operation result to the regulator 50.
Wherein, the controller 30 performs PID operation on the comparison result, and the obtained operation result is a digital signal. After receiving the operation result, the D/a converter 40 converts the operation result into a standard 4-20mA current signal, i.e., a second analog signal, to obtain a converted operation result, and transmits the converted operation result to the regulator 50, so that the regulator 50 is configured to obtain regulation information according to the converted operation result, and regulate the flow rate of the second cooling medium according to the regulation information to regulate the temperature of the first cooling medium.
For example, in the present disclosure, a preset temperature value is set as a, the outlet water temperature of the first cooling medium obtained by the outlet water temperature sensor 11 is B, when the outlet water temperature B is converted and transmitted to the controller 30, the controller 30 compares the converted outlet water temperature B of the first cooling medium with the preset temperature value a to obtain a comparison result C, performs PID operation on the comparison result to obtain an operation result D, converts the operation result D into a standard 4-20mA current signal and transmits the standard 4-20mA current signal to the regulator 50, and the regulator 50 obtains regulation information E according to the converted operation result D, and then regulates the opening degree of the regulator according to the regulation information E to control the flow rate of the second cooling medium.
In the disclosure, the outlet water temperature B of the first cooling medium after the conversion processing is compared with a preset temperature value a to obtain a comparison result C, where the comparison result C is a difference value between the outlet water temperature B of the first cooling medium and the preset temperature value a.
When PID operation is carried out on the comparison result, the difference is divided into a plurality of stages corresponding to different values, for example, the difference is divided into 20 stages, and when the difference is 0-5 ℃, the control quantity 1 is output, namely the operation result D is 1; when the difference is 5-10 ℃, outputting a control quantity 2, namely, the operation result D is 2; by analogy, when the difference is 95-100 ℃, the control quantity is output to be 20, namely the operation result D is 20; when the difference is less than 0 ℃, the control quantity 0 is output, namely the operation result D is 0.
When the D/a converter 40 converts the operation result D, the output control amount is converted into a standard 4-20mA current signal so that the regulator 50 obtains the regulation information E based on the converted current signal, for example, when the operation result D is converted, the obtained current signal is 16mA, the regulation information obtained by the regulator 50 is an opening degree of 80%, and when the regulator 50 adjusts the opening degree thereof based on the regulation information E, the opening degree thereof is adjusted to 80% to control the flow rate of the second cooling medium.
In the present disclosure, if the outlet water temperature of the first cooling medium is greater than a preset temperature value, the opening degree of the regulator 50 is increased, and if the outlet water temperature of the first cooling medium is less than the preset temperature value, the opening degree of the regulator 50 is decreased, and the flow rate of the second cooling medium is adjusted by adjusting the opening degree of the regulator 50, so as to adjust the temperature of the first cooling medium.
Further, with continuing reference to fig. 2, the heat exchanger control system 100 further includes a display 60 and an a/D converter 20, wherein the display 60 is connected to the controller 30.
The regulator 50 is also configured to feed back the regulation information to the a/D converter 20 after regulating the flow rate of the second cooling medium of the heat exchanger 200 according to the regulation information.
The a/D converter 20 is configured to convert the adjustment information and send the converted adjustment information to the controller 30.
The a/D converter 20 converts the adjustment information into a digital signal and sends the digital signal to the controller 30.
The controller 30 is configured to send the converted adjustment information to the display 60, so that the display 60 displays the converted adjustment information.
In the present disclosure, the display 60 may be a liquid crystal display or a touch display. In the case of a touch display, the display can be a capacitive touch screen or a resistive touch screen, which supports single-point and multi-point touch operations. Supporting single-point and multi-point touch operations means that the touch display can sense touch operations generated from one or more positions on the touch display, and the sensed touch operations are sent to the controller 30 for calculation and processing. Optionally, in the present disclosure, the display 60 is a touch display, which is a velcro MT6050i model.
Further, with continuing reference to fig. 2, the heat exchanger control system 100 further includes a water inlet pressure transmitter 13, a water outlet pressure transmitter 14, a water inlet temperature sensor 12, and a flow meter 15; the a/D converter 20 is electrically connected to the water inlet pressure transmitter 13, the water outlet pressure transmitter 14, the flowmeter 15, the water inlet temperature sensor 12, and the water outlet temperature sensor 11, respectively.
Pressure transmitter 13 intakes, go out water pressure transmitter 14, flowmeter 15, temperature sensor 12 and the leaving water temperature sensor 11 of intaking are used for acquireing respectively first coolant's pressure of intaking, play water pressure, flow, the temperature of intaking and leaving water temperature will acquire respectively first coolant's pressure of intaking, play water pressure, flow, the temperature of intaking and leaving water temperature convert corresponding analog signal to transmit extremely AD converter 20.
The a/D converter 20 is configured to convert analog signals corresponding to the inlet pressure, the outlet pressure, the flow rate, the inlet temperature, and the outlet temperature of the first cooling medium into corresponding digital signals, respectively, and transmit the digital signals to the controller 30.
The controller 30 is configured to transmit the received digital quantity signal to the display 60, so that the display 60 displays the digital quantity signal.
Wherein, after receiving the digital signal transmitted by the a/D converter 20, the controller 30 transmits the received digital signal to the display 60, so that the display 60 displays the digital signal.
In this disclosure, optionally, a threshold may be set for the water inlet pressure, the water outlet pressure, the water flow, the water inlet temperature and the water outlet temperature of the first cooling medium, after the controller 30 detects that the water inlet pressure, the water outlet pressure, the water flow, the water inlet temperature and the water outlet temperature of the first cooling medium exceed the set threshold, an alarm signal is output, and the display 60 performs an alarm prompt.
In the present disclosure, the heat exchanger control system 100 further includes a frequency converter (not shown), the frequency converter is electrically connected to the D/a converter 40, and the controller 30 sends a control signal, and the control signal is converted by the D/a converter 40 and transmitted to the frequency converter, so that the frequency converter adjusts the frequency of the water pump of the heat exchanger 200, and the water pump of the heat exchanger 200 operates at a corresponding frequency. In the present disclosure, the frequency converter feeds back the adjusted frequency to the a/D converter 20 after adjusting the frequency, transmits the frequency to the controller 30 after converting the frequency by the a/D converter 20, and transmits the frequency to the display 60 for displaying by the controller 30.
In the present disclosure, the inlet pressure transmitter 13 and the outlet pressure transmitter 14 are model number E + H PMP131-a1101 A1S; the model of the flow meter 15 is E + H PROWIRL 72F 40; the models of the inlet water temperature sensor 12 and the outlet water temperature sensor 11 are E + H TMR31-A1ABBBAB1 AAA; the type of the frequency converter is Danfoss VLT2855PT 4B; the model of the water pump is granofur CR15-5, and the model of the heat exchanger 200 is Ampere H17 MGS-10C/1.
Further, please refer to fig. 3, the heat exchanger control method provided by the present disclosure is applied to the heat exchanger control system 100, where the heat exchanger control system 100 includes an outlet water temperature sensor 11, a controller 30 and a regulator 50; the outlet water temperature sensor 11, the controller 30 and the regulator 50 are respectively electrically connected with the heat exchanger 200; the following explains a specific flow of the heat exchanger control method shown in fig. 3.
Step S10: the outlet water temperature sensor 11 obtains the outlet water temperature of the first cooling medium of the heat exchanger 200, and transmits the outlet water temperature of the first cooling medium to the controller 30 after performing conversion processing.
Step S20: the controller 30 receives the converted outlet water temperature of the first cooling medium, and compares the converted outlet water temperature of the first cooling medium with a preset temperature value to obtain a comparison result.
Step S30: the controller 30 performs PID operation on the comparison result to obtain an operation result, and converts the operation result and transmits the result to the regulator 50.
Step S40: the regulator 50 obtains regulation information according to the calculation result after the conversion processing, and regulates the flow rate of the second cooling medium of the heat exchanger 200 according to the regulation information, so as to regulate the temperature of the first cooling medium.
Further, referring to fig. 4, the heat exchanger control system 100 includes an a/D converter 20, the outlet water temperature sensor 11 is electrically connected to the a/D converter 20, and the a/D converter 20 is electrically connected to the controller 30; the step of acquiring the outlet water temperature of the first cooling medium of the heat exchanger 200 by the outlet water temperature sensor 11, and transmitting the outlet water temperature of the first cooling medium to the controller 30 after conversion processing includes the following steps.
Step S11: the outlet water temperature sensor 11 obtains the outlet water temperature of the first cooling medium, and converts the outlet water temperature of the first cooling medium into a first analog quantity signal.
Step S12: the a/D converter 20 converts the first analog signal into a digital signal, obtains the outlet water temperature of the first cooling medium after the conversion processing, and transmits the outlet water temperature of the first cooling medium after the conversion processing to the controller 30.
Further, referring to fig. 5, the heat exchanger control system 100 includes a D/a converter 40, the controller 30 is electrically connected to the D/a converter 40, and the D/a converter 40 is electrically connected to the regulator 50; the step of performing PID operation on the comparison result by the controller 30 to obtain an operation result, and transmitting the operation result to the regulator 50 after performing conversion processing on the operation result includes the following steps.
Step S31: the controller 30 performs PID operation on the comparison result to obtain an operation result, and transmits the operation result to the D/a converter 40.
Step S32: the D/a converter 40 converts the operation result into a second analog signal to obtain a converted operation result, and transmits the converted operation result to the regulator 50.
Further, referring to fig. 6, the heat exchanger control system 100 further includes a display 60 and an a/D converter 20, wherein the display 60 is connected to the controller 30; after the regulator 50 obtains the regulation information according to the operation result after the conversion processing, and regulates the flow rate of the second cooling medium of the heat exchanger 200 according to the regulation information, the method further includes the following steps.
Step S41: the regulator 50 feeds back the regulation information to the a/D converter 20.
Step S42: the a/D converter 20 converts the adjustment information and sends the converted adjustment information to the controller 30.
Step S43: the controller 30 transmits the converted adjustment information to the display 60 so that the display 60 displays the converted adjustment information.
Further, referring to fig. 7, the heat exchanger control system 100 further includes a water inlet pressure transmitter 13, a water outlet pressure transmitter 14, a water inlet temperature sensor 12, and a flow meter 15; the A/D converter 20 is electrically connected with the water inlet pressure transmitter 13, the water outlet pressure transmitter 14, the flowmeter 15, the water inlet temperature sensor 12 and the water outlet temperature sensor 11 respectively; the method further comprises the following steps.
Step S50: pressure transmitter 13 intakes, go out water pressure transmitter 14, flowmeter 15, temperature sensor 12 and the leaving water temperature sensor 11 of intaking acquires respectively first coolant's pressure of intaking, play water pressure, flow, the temperature of intaking and leaving water temperature will acquire respectively first coolant's pressure of intaking, play water pressure, flow, the temperature of intaking and leaving water temperature convert corresponding analog signal into, and transmit extremely AD converter 20.
Step S60: the a/D converter 20 converts analog signals corresponding to the inlet pressure, outlet pressure, flow rate, inlet temperature, and outlet temperature of the first cooling medium into corresponding digital signals, respectively, and transmits the digital signals to the controller 30.
Step S70: the controller 30 transmits the received digital quantity signal to the display 60 to cause the display 60 to display.
The heat exchanger control method provided in the present disclosure has the same implementation principle and technical effect as the heat exchanger control system 100, and for the sake of brief description, no part is mentioned in the method embodiment, and reference may be made to the corresponding contents in the foregoing system, and redundant description is not repeated here.
In summary, the heat exchanger control system and method provided by the present disclosure obtain the outlet water temperature of the first cooling medium of the heat exchanger through the outlet water temperature sensor, convert the outlet water temperature of the first cooling medium and transmit the converted outlet water temperature to the controller, and the controller compares the outlet water temperature of the converted first cooling medium with the preset temperature value after receiving the converted outlet water temperature of the first cooling medium, obtain the comparison result, perform PID operation on the comparison result after obtaining the comparison result, obtain the operation result, convert the operation result and transmit the operation result to the regulator, so that the regulator obtains the adjustment information according to the converted operation result, and adjusts the flow rate of the second cooling medium of the heat exchanger according to the adjustment information, thereby adjusting the temperature of the first cooling medium, and controlling the reaction rapidly, and the adjustment time is short, the temperature of the heat exchanger can be quickly adjusted. In addition, the heat exchanger control system and method provided by the disclosure have the advantages of simple structure and stable performance, and can be used for coping with recurrent changes and quickly realizing temperature regulation of the heat exchanger.
In the several embodiments provided in the present disclosure, it should be understood that the disclosed system and method may be implemented in other ways. The above-described system and method embodiments are merely illustrative, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present disclosure may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, an electronic device, or a network device) to execute all or part of the steps of the method according to the embodiments of the present disclosure. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes. It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
The foregoing is illustrative of only alternative embodiments of the present disclosure and is not intended to limit the disclosure, which may be modified and varied by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (8)
1. A heat exchanger control system is applied to a heat exchanger and is characterized by comprising an outlet water temperature sensor, a controller and a regulator; the water outlet temperature sensor, the controller and the regulator are respectively and electrically connected with the heat exchanger;
the outlet water temperature sensor is used for acquiring the outlet water temperature of a first cooling medium of the heat exchanger, converting the outlet water temperature of the first cooling medium and transmitting the converted outlet water temperature to the controller;
the controller is used for receiving the water outlet temperature of the first cooling medium after conversion processing, and comparing the water outlet temperature of the first cooling medium after conversion processing with a preset temperature value to obtain a comparison result;
the controller is used for carrying out PID operation on the comparison result to obtain an operation result, and transmitting the operation result to the regulator after conversion processing; when PID operation is carried out on the comparison result, the difference value is divided into a plurality of stages corresponding to different numerical values to obtain an operation result;
the regulator is used for obtaining regulation information according to the operation result after conversion processing, and regulating the flow of the second cooling medium of the heat exchanger according to the regulation information so as to regulate the temperature of the first cooling medium;
the heat exchanger control system also comprises a display and an A/D converter, wherein the display is connected with the controller;
the regulator is also used for feeding back the regulation information to the A/D converter after the flow of the second cooling medium of the heat exchanger is regulated according to the regulation information;
the A/D converter is used for converting the adjusting information and then sending the information to the controller;
the controller is used for sending the converted adjusting information to the display so that the display displays the converted adjusting information.
2. The heat exchanger control system of claim 1, further comprising an a/D converter; the water outlet temperature sensor is electrically connected with the A/D converter, and the A/D converter is electrically connected with the controller;
the water outlet temperature sensor is used for acquiring the water outlet temperature of the first cooling medium and converting the water outlet temperature of the first cooling medium into a first analog quantity signal;
the A/D converter is used for converting the first analog quantity signal into a digital quantity signal to obtain the water outlet temperature of the first cooling medium after conversion processing, and transmitting the water outlet temperature of the first cooling medium after conversion processing to the controller.
3. The heat exchanger control system of claim 1, further comprising a D/a converter; the controller is electrically connected with the D/A converter, and the D/A converter is electrically connected with the regulator;
the controller is used for carrying out PID operation on the comparison result to obtain an operation result and transmitting the operation result to the D/A converter;
the D/A converter is used for converting the operation result into a second analog quantity signal to obtain the operation result after conversion processing, and transmitting the operation result after conversion processing to the regulator.
4. The heat exchanger control system of claim 1, further comprising an inlet water pressure transmitter, an outlet water pressure transmitter, an inlet water temperature sensor, and a flow meter; the A/D converter is respectively and electrically connected with the water inlet pressure transmitter, the water outlet pressure transmitter, the flowmeter, the water inlet temperature sensor and the water outlet temperature sensor;
the water inlet pressure transmitter, the water outlet pressure transmitter, the flowmeter, the water inlet temperature sensor and the water outlet temperature sensor are respectively used for acquiring the water inlet pressure, the water outlet pressure, the flow, the water inlet temperature and the water outlet temperature of the first cooling medium, respectively converting the acquired water inlet pressure, the water outlet pressure, the flow, the water inlet temperature and the water outlet temperature of the first cooling medium into corresponding analog quantity signals, and transmitting the analog quantity signals to the A/D converter;
the A/D converter is used for respectively converting analog quantity signals corresponding to the water inlet pressure, the water outlet pressure, the flow, the water inlet temperature and the water outlet temperature of the first cooling medium into corresponding digital quantity signals and transmitting the digital quantity signals to the controller;
the controller is used for transmitting the received digital quantity signal to the display so as to enable the display to display.
5. A heat exchanger control method is characterized by being applied to the heat exchanger control system of any one of claims 1 to 4, wherein the heat exchanger control system comprises a water outlet temperature sensor, a controller and a regulator; the outlet water temperature sensor, the controller and the regulator are respectively and electrically connected with the heat exchanger; the method comprises the following steps:
the outlet water temperature sensor acquires the outlet water temperature of a first cooling medium of the heat exchanger, and the outlet water temperature of the first cooling medium is converted and then transmitted to the controller;
the controller receives the water outlet temperature of the first cooling medium after conversion processing, and compares the water outlet temperature of the first cooling medium after conversion processing with a preset temperature value to obtain a comparison result;
the controller performs PID operation on the comparison result to obtain an operation result, and the operation result is converted and then transmitted to the regulator; when PID operation is carried out on the comparison result, the difference value is divided into a plurality of stages corresponding to different numerical values to obtain an operation result;
the regulator obtains regulation information according to the operation result after conversion processing, and regulates the flow of the second cooling medium of the heat exchanger according to the regulation information so as to regulate the temperature of the first cooling medium;
the heat exchanger control system also comprises a display and an A/D converter, wherein the display is connected with the controller; after the regulator obtains regulation information according to the operation result after the conversion processing, and regulates the flow rate of the second cooling medium of the heat exchanger according to the regulation information, the method further includes:
the regulator feeds back the regulation information to the A/D converter;
the A/D converter converts the adjusting information and then sends the information to the controller;
and the controller sends the converted regulating information to the display so that the display displays the converted regulating information.
6. The heat exchanger control method according to claim 5, wherein the heat exchanger control system comprises an A/D converter, the effluent temperature sensor is electrically connected with the A/D converter, and the A/D converter is electrically connected with the controller; the step that the outlet water temperature sensor obtains the outlet water temperature of the first cooling medium of the heat exchanger, converts the outlet water temperature of the first cooling medium and transmits the converted outlet water temperature to the controller comprises the following steps:
the water outlet temperature sensor acquires the water outlet temperature of the first cooling medium and converts the water outlet temperature of the first cooling medium into a first analog quantity signal;
the A/D converter converts the first analog quantity signal into a digital quantity signal to obtain the water outlet temperature of the first cooling medium after conversion processing, and transmits the water outlet temperature of the first cooling medium after conversion processing to the controller.
7. The heat exchanger control method according to claim 5, wherein the heat exchanger control system includes a D/a converter, the heat exchanger control system further including a D/a converter; the controller is electrically connected with the D/A converter, and the D/A converter is electrically connected with the regulator; the step that the controller carries out PID operation on the comparison result to obtain an operation result, and the operation result is transmitted to the regulator after being converted comprises the following steps:
the controller performs PID operation on the comparison result to obtain an operation result, and transmits the operation result to the D/A converter;
and the D/A converter converts the operation result into a second analog quantity signal to obtain an operation result after conversion processing, and transmits the operation result after conversion processing to the regulator.
8. The heat exchanger control method according to claim 5, wherein the heat exchanger control system further comprises a water inlet pressure transmitter, a water outlet pressure transmitter, a water inlet temperature sensor, and a flow meter; the A/D converter is respectively and electrically connected with the water inlet pressure transmitter, the water outlet pressure transmitter, the flowmeter, the water inlet temperature sensor and the water outlet temperature sensor; the method further comprises the following steps:
the water inlet pressure transmitter, the water outlet pressure transmitter, the flowmeter, the water inlet temperature sensor and the water outlet temperature sensor respectively acquire the water inlet pressure, the water outlet pressure, the flow, the water inlet temperature and the water outlet temperature of the first cooling medium, respectively convert the acquired water inlet pressure, water outlet pressure, flow, water inlet temperature and water outlet temperature of the first cooling medium into corresponding analog quantity signals, and transmit the analog quantity signals to the A/D converter;
the A/D converter converts analog quantity signals corresponding to the water inlet pressure, the water outlet pressure, the flow, the water inlet temperature and the water outlet temperature of the first cooling medium into corresponding digital quantity signals respectively and transmits the digital quantity signals to the controller;
the controller transmits the received digital quantity signal to the display so as to enable the display to display.
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| CN114139405A (en) * | 2022-01-18 | 2022-03-04 | 光大环保技术装备（常州）有限公司 | Cooling medium temperature regulation and control method, system and equipment for circulating cooling system |
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