A central heating heat exchange station control system

Abstract

The utility model relates to the technical field of heat supply, especially a central heating heat exchange station control system. Including heat exchange station main part, including primary side heat supply pipeline and at least one secondary side heat supply pipeline, execution component, temperature acquisition module, the temperature setting module storage has the preset temperature of secondary side heat supply pipeline medium, main control module, the main control module inside has integrated temperature control module, temperature control module's signal input end with temperature acquisition module communication connection to receive temperature sensing data, signal calling end with temperature setting module communication connection to obtain preset temperature, the main control module is connected with the timer for timing trigger temperature control module. Solve the problem of the central heating heat exchange station control system for lacking the time sequence control of batch start and stop and the coordination problem of secondary side multiple parameter adjustment.

Description

Technical Field

[0001] This utility model relates to the field of heating technology, and in particular to a control system for a centralized heating heat exchange station. Background Technology

[0002] In centralized heating systems, heat exchange stations are the core hubs for heat transfer between heat sources and users. Current mainstream centralized heating heat exchange station control systems typically include primary heating pipelines, multiple secondary heating pipelines, and heat exchangers. However, existing heat exchange station control systems still face two key and urgent technical challenges in practical applications: On the one hand, the lack of batch start-up and shutdown control for secondary-side actuators can easily impact the power grid. In existing systems, when adjusting secondary-side temperature, all secondary-side water pumps and frequency converters are often controlled to start or stop synchronously after the temperature deviates from the preset value. This synchronous operation leads to significant instantaneous power fluctuations in secondary-side equipment, exceeding the grid's carrying capacity and potentially causing power outages. On the other hand, the coordination between secondary-side temperature regulation, pressure control, and water replenishment is insufficient, resulting in poor heat exchange stability. When temperature regulation starts or stops the actuators, the water replenishment operation is not synchronized with the temperature regulation timing, easily leading to untimely or excessive water replenishment, further affecting secondary-side heat exchange efficiency.

[0003] Therefore, the existing control system for centralized heating heat exchange stations lacks the timing control for batch start-up and shutdown, as well as the coordinated mechanism for adjusting multiple parameters on the secondary side, making it difficult to balance power grid safety and heat exchange stability. Utility Model Content

[0004] To address the issues of lacking sequential control for batch start-up and shutdown in centralized heating heat exchange station control systems, as well as the coordination problem of multi-parameter adjustment on the secondary side, this utility model provides a centralized heating heat exchange station control system.

[0005] In a first aspect, the present invention provides a centralized heating heat exchange station control system, comprising: The main body of the heat exchange station includes a primary heating pipeline and at least one secondary heating pipeline, wherein the primary heating pipeline and the secondary heating pipeline exchange heat through a heat exchanger. The execution components include a primary water supply pump and a primary return water pump installed on the primary side heating pipeline, and a secondary water supply pump and a secondary return water pump installed on the secondary side heating pipeline. The temperature acquisition module includes a temperature sensor installed in the secondary heating pipeline; The temperature setting module stores the preset temperature of the medium in the secondary heating pipeline; The main control module integrates a temperature control module. The signal input terminal of the temperature control module is communicatively connected to the temperature acquisition module to receive temperature sensing data, and the signal calling terminal is communicatively connected to the temperature setting module to obtain a preset temperature. The main control module is also connected to a timer for triggering the temperature control module.

[0006] The heat exchanger in the main body of the heat exchange station is a plate heat exchanger. The primary heating pipeline transports high-temperature medium from the heat source plant, and the secondary heating pipeline transports circulating water to be heated from the user end. Heat transfer between the two is achieved through the heat exchange plates of the plate heat exchanger. The inlet end of the primary heating pipeline is connected to the outlet of the heat source plant, and the return end is connected to the inlet of the heat source plant. The supply end of the secondary heating pipeline is connected to the inlet of the user end, and the return end is connected to the outlet of the user end. Two or more secondary heating pipelines can be configured according to the scale of users, corresponding to different user areas.

[0007] Furthermore, pressure sensors are installed on the primary heating pipeline and the secondary heating pipeline. The signal output terminal of the pressure sensor is communicatively connected to the main control module to transmit pressure sensing data of the medium in the primary heating pipeline and the secondary heating pipeline to the main control module.

[0008] Furthermore, the execution component also includes a frequency converter, which is connected to the primary water supply pump, the primary return water pump, the secondary water supply pump, and the secondary return water pump respectively. The signal input terminal of the frequency converter is communicatively connected to the signal output terminal of the main control module. This allows the main control module to adjust the operating parameters of the corresponding water pumps through the frequency converter at different stages triggered by the timer, thereby achieving batch temperature control.

[0009] Furthermore, the main control module integrates a pressure control module. The signal input terminal of the pressure control module is communicatively connected to the pressure sensor to receive pressure sensing data of the medium, and the signal call terminal is communicatively connected to the pressure setting module to obtain the preset pressure. The pressure setting module is used to store the preset pressure of the medium in the primary heating pipeline and the secondary heating pipeline.

[0010] Furthermore, a water replenishment assembly is provided on the secondary heating pipeline. This assembly includes a water reservoir, a water replenishment pipe, and a water replenishment pump. The water reservoir is connected to the secondary heating pipeline via the water replenishment pipe, and the water replenishment pump is mounted on the water replenishment pipe. The signal input terminal of the water replenishment pump is communicatively connected to the signal output terminal of the main control module. This allows the main control module to control the water replenishment pump to start replenishing water if it detects insufficient pressure in the secondary water supply pipeline during the timer's timing process, ensuring stable heat exchange.

[0011] Furthermore, the water replenishment component also includes a liquid level acquisition module, which is located inside the water reservoir. The signal output terminal of the liquid level acquisition module is communicatively connected to the main control module to transmit the liquid level data of the medium inside the water reservoir to the main control module. This data is used by the main control module to determine the start and stop timing of the water replenishment pump, preventing water shortage in the water reservoir from affecting the water replenishment operation after the timer is triggered.

[0012] Furthermore, the main control module integrates a remote communication module, which communicates with the remote control platform. The signal output terminal of the remote control platform is connected to a cloud storage module.

[0013] The main control module uploads temperature sensor data and timer running status data to the remote control platform. At the same time, it receives timer delay duration adjustment instructions from the remote control platform. The remote control platform transmits the received temperature sensor data, timer timing data, and on-site image data to the cloud storage module for subsequent tracking of the system operation process.

[0014] Furthermore, the signal output terminal of the temperature sensor is connected to the signal acquisition terminal of the main control module via a single bus, and the signal transmission line between the temperature sensor and the main control module is integrated on the signal layer of the double-layer PCB board. The double-layer PCB board provides an integrated mounting carrier for the temperature acquisition module, the temperature control module and the timer, and the three are interconnected through the copper foil lines on the PCB board.

[0015] Furthermore, the signal comparison unit of the pressure control module includes an operational amplifier, which is integrated in the analog signal area of ​​the double-layer PCB board. The non-inverting input terminal of the operational amplifier is connected to the signal output terminal of the pressure sensor through a copper foil circuit, and the inverting input terminal is connected to the preset pressure output terminal of the pressure setting module. The output terminal of the operational amplifier is connected to the ADC acquisition terminal of the main control module through an RC filter circuit to filter out high-frequency noise in the pressure sensing data.

[0016] Furthermore, a rectifier module and a filter module are provided between the frequency converter of the execution component and the corresponding water pump. The input terminal of the rectifier module is electrically connected to the output terminal of the frequency converter, and the output terminal of the filter module is electrically connected to the motor control terminal of the water pump. The rectifier module, the filter module and the frequency converter are integrated together in a functional sub-area of ​​a double-layer PCB board. The functional sub-area is connected to the power supply terminal of the main control module through a power line, and is communicatively connected to the frequency converter control terminal of the main control module through a control line.

[0017] In summary, this utility model has the following beneficial technical effects: 1. This utility model uses a timer as the core timing control component, working in conjunction with the main control module and the frequency converter to achieve phased start-up and shutdown of secondary-side execution components: when the secondary-side temperature deviates from the preset value, the main control module does not simultaneously control all secondary water supply pumps, secondary return pumps, and corresponding frequency converters. Instead, it triggers the temperature control module through the timer to start or shut down the equipment in stages according to the preset delay time. This avoids sudden increases or decreases in the instantaneous power of secondary-side equipment, and is especially suitable for older residential areas or areas with concentrated grid loads. It effectively reduces faults such as circuit breaker tripping and line overheating, reduces power surges, and ensures the stability of grid operation.

[0018] 2. This utility model employs multi-parameter coordinated control on the secondary side to improve heat exchange stability and heating quality. The main control module integrates a temperature control module and a pressure control module, and links them with the water replenishment component. During the timer's batch adjustment of the water pump and frequency converter, the pressure control module receives pressure sensor data in real time and compares it with the preset value from the pressure setting module, thus preventing damage caused by excessive water pressure. If insufficient secondary side pressure is detected, the main control module can simultaneously trigger the water replenishment pump to start replenishing water. Simultaneously, it combines the water level data from the water storage tank transmitted by the liquid level acquisition module to determine the timing of the water replenishment pump's start and stop, preventing water replenishment interruptions due to water shortage in the water storage tank. This coordinated control method links secondary side temperature regulation, pressure stabilization, and water replenishment operations, improving heat exchange stability and ensuring that the heating quality at the user end consistently meets standards.

[0019] 3. The dual remote and local control of this utility model enhances the operability and fault traceability of the system. Temperature sensor data and timer operating status can be uploaded to the remote control platform. Staff can remotely adjust the timer delay duration without on-site operation. At the same time, the remote control platform transmits various operating data to the cloud storage module, which facilitates the traceability of the system operation process in the later stage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a centralized heating heat exchange station control system according to an embodiment of this utility model.

[0021] Figure 2 This is a control block diagram of the main control module in an embodiment of this utility model.

[0022] Figure 3 This is a control block diagram of the pressure control module according to an embodiment of the present invention.

[0023] Figure 4 This is a control block diagram of the frequency converter according to an embodiment of the present invention.

[0024] The components include: 1. Main body of the heat exchange station; 2. Primary heating pipeline; 201. Primary water supply pump; 202. Primary return water pump; 3. Secondary heating pipeline; 301. Secondary water supply pump; 302. Secondary return water pump; 4. Water replenishment assembly; 401. Water storage tank; 402. Water replenishment pipeline; 403. Water replenishment pump; 404. Liquid level acquisition module; 5. Temperature sensor; 6. Pressure sensor; 7. Frequency converter; 701. Rectifier module; 702. Filter module; 8. Main control module; 801. Temperature control module; 802. Temperature setting module; 803. Pressure control module; 804. Operational amplifier; 805. RC filter circuit; 806. Pressure setting module; 807. Remote communication module; 808. Remote control platform; 809. Cloud storage module; 9. Timer. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Example 1 Reference Figure 1 and Figure 2 This embodiment of a centralized heating heat exchange station control system includes: The main body 1 of the heat exchange station includes a primary heating pipeline 2 and at least one secondary heating pipeline 3, wherein the primary heating pipeline 2 and the secondary heating pipeline 3 exchange heat through a heat exchanger. The execution components include a primary water supply pump 201 and a primary return water pump 202 installed on the primary side heating pipeline 2, and a secondary water supply pump 301 and a secondary return water pump 302 installed on the secondary side heating pipeline 3. The temperature acquisition module includes a temperature sensor 5 installed on the secondary heating pipeline 3; The temperature setting module 802 stores the preset temperature of the medium in the secondary heating pipeline 3; The main control module 8 integrates a temperature control module 801. The signal input terminal of the temperature control module 801 is communicatively connected to the temperature acquisition module to receive temperature sensing data, and the signal calling terminal is communicatively connected to the temperature setting module 802 to obtain a preset temperature. The main control module 8 is connected to a timer 9 for timing and triggering the temperature control module 801.

[0027] The heat exchanger in the main body 1 of the heat exchange station is a plate heat exchanger. The primary heating pipeline 2 transports high-temperature medium from the heat source plant, and the secondary heating pipeline 3 transports circulating water from the user end to be heated. The two achieve heat transfer through the heat exchange plates of the plate heat exchanger. The inlet end of the primary heating pipeline 2 is connected to the outlet of the heat source plant, and the return end is connected to the inlet of the heat source plant. The supply end of the secondary heating pipeline 3 is connected to the inlet of the user end, and the return end is connected to the outlet of the user end. Two or more secondary heating pipelines 3 can be configured according to the user scale, corresponding to different user areas.

[0028] The heat exchanger in the main body 1 of the heat exchange station is a plate heat exchanger. The primary heating pipeline 2 transports high-temperature medium from the heat source plant, and the secondary heating pipeline 3 transports circulating water from the user end to be heated. The two achieve heat transfer through the heat exchange plates of the plate heat exchanger. The inlet end of the primary heating pipeline 2 is connected to the outlet of the heat source plant, and the return end is connected to the inlet of the heat source plant. The supply end of the secondary heating pipeline 3 is connected to the inlet of the user end, and the return end is connected to the outlet of the user end. Two or more secondary heating pipelines 3 can be configured according to the user scale, corresponding to different user areas.

[0029] Reference Figure 1 and Figure 2 Pressure sensors 6 are provided on the primary heating pipeline 2 and the secondary heating pipeline 3. The signal output terminal of the pressure sensor 6 is connected to the main control module 8 to transmit the pressure sensing data of the medium in the primary heating pipeline 2 and the secondary heating pipeline 3 to the main control module 8.

[0030] The execution component also includes a frequency converter 7, which is connected to the primary water supply pump 201, the primary return water pump 202, the secondary water supply pump 301, and the secondary return water pump 302 respectively. The signal input terminal of the frequency converter 7 is communicatively connected to the signal output terminal of the main control module 8. This allows the main control module 8 to adjust the operating parameters of the corresponding water pumps through the frequency converter 7 at different stages triggered by the timer 9, thereby achieving batch temperature control.

[0031] Reference Figure 2 The main control module 8 integrates a pressure control module 803. The signal input terminal of the pressure control module 803 is connected to the pressure sensor 6 to receive the pressure sensing data of the medium. The signal call terminal is connected to the pressure setting module 806 to obtain the preset pressure. The pressure setting module 806 is used to store the preset pressure of the medium in the primary heating pipeline 2 and the secondary heating pipeline 3.

[0032] Reference Figure 1The secondary heating pipeline 3 is equipped with a water replenishment component 4, which includes a water reservoir 401, a water replenishment pipe 402, and a water replenishment pump 403. The water reservoir 401 is connected to the secondary heating pipeline 3 through the water replenishment pipe 402, and the water replenishment pump 403 is located on the water replenishment pipe 402. The signal input terminal of the water replenishment pump 403 is communicatively connected to the signal output terminal of the main control module 8. If the main control module 8 detects insufficient pressure in the secondary water supply pipeline during the timing process of the timer 9, it can control the water replenishment pump 403 to start replenishing water, ensuring stable heat exchange.

[0033] Reference Figure 1 The water replenishment component 4 also includes a liquid level acquisition module 404, which is located inside the water reservoir 401. The signal output terminal of the liquid level acquisition module 404 is communicatively connected to the main control module 8 to transmit the liquid level data of the medium inside the water reservoir 401 to the main control module 8. This data is used by the main control module 8 to determine the start and stop timing of the water replenishment pump 403, preventing water shortage in the water reservoir 401 from affecting the water replenishment operation triggered by the timer 9.

[0034] The water reservoir 401 of the water replenishment component 4 is a closed water tank made of stainless steel. It is connected to the water supply section of the secondary heating pipeline 3 through a standardized water replenishment pipe 402. The water replenishment pipe 402 is equipped with a solenoid valve to control the opening and closing of the water replenishment pipe 402. The water replenishment pump 403 is a submersible pump of model QDX1.5-16-0.37, located at the bottom of the water reservoir 401. Its motor control terminal is connected to the water replenishment control terminal of the main control module 8 through a control line. The liquid level acquisition module 404 is an immersion liquid level sensor of model YH-801. Its probe is located at the bottom 1 / 3 height of the water reservoir 401. The signal cable passes through the water reservoir 401 through a waterproof connector and is connected to the liquid level acquisition terminal of the main control module 8 through a twisted pair cable. The liquid level judgment logic of the liquid level acquisition module 404 is the existing high and low liquid level threshold comparison logic, which is only used to transmit the real-time liquid level data in the water reservoir 401 to the main control module 8.

[0035] Reference Figure 2 The main control module 8 integrates a remote communication module 807, and the main control module 8 communicates with the remote control platform 808 through the remote communication module 807. The signal output terminal of the remote control platform 808 is communicatively connected to the cloud storage module 809.

[0036] The main control module 8 uploads temperature sensing data and timer 9 running status data to the remote control platform 808. At the same time, it receives timer 9 delay duration adjustment instructions issued by the remote control platform 808. The remote control platform 808 transmits the received temperature sensing data, timer 9 timing data and on-site image data to the cloud storage module 809 for subsequent tracking of the system operation process.

[0037] The signal output terminal of the temperature sensor 5 is connected to the signal acquisition terminal of the main control module 8 via a single bus. The signal transmission line between the temperature sensor 5 and the main control module 8 is integrated on the signal layer of the double-layer PCB board. The double-layer PCB board provides an integrated mounting carrier for the temperature acquisition module, the temperature control module 801 and the timer 9. The three are interconnected by copper foil lines on the PCB board.

[0038] Reference Figure 3 The signal comparison unit of the pressure control module 803 includes an operational amplifier 804, which is integrated into the analog signal area of ​​the double-layer PCB board. The non-inverting input terminal of the operational amplifier 804 is connected to the signal output terminal of the pressure sensor 6 through a copper foil circuit, and the inverting input terminal is connected to the preset pressure output terminal of the pressure setting module 806. The output terminal of the operational amplifier 804 is connected to the ADC acquisition terminal of the main control module 8 through an RC filter circuit 805 to filter out high-frequency noise in the pressure sensing data.

[0039] Reference Figure 4 The inverter 7 of the execution component is provided with a rectifier module 701 and a filter module 702 between it and the corresponding water pump. The input terminal of the rectifier module 701 is electrically connected to the output terminal of the inverter 7, and the output terminal of the filter module 702 is electrically connected to the motor control terminal of the water pump. The rectifier module 701, the filter module 702 and the inverter 7 are integrated together in a functional sub-area of ​​a double-layer PCB board. The functional sub-area is connected to the power supply terminal of the main control module 8 through a power line, and is communicatively connected to the control terminal of the inverter 7 of the main control module 8 through a control line.

[0040] The main control module 8 uses a 32-bit STM32F103C8T6 microcontroller. This microcontroller integrates a temperature control module 801 and a pressure control module 803. The control logic of both modules is based on existing conventional parameter comparison and signal output logic. The main control module 8 has a signal acquisition terminal, a signal output terminal, and a parameter configuration terminal, used to receive external sensor data, connect to execution components, and communicate with the remote communication module 807, respectively. The timer 9 is a built-in timer of the microcontroller, supporting configuration of the delay duration through the main control module 8. The timing trigger logic uses existing timer interrupt processing logic to output a trigger signal after a preset duration. The main control module 8 integrates components through a double-layer PCB board. The signal layer of the double-layer PCB board houses the signal transmission lines of the temperature acquisition module, temperature control module 801, and timer 9. The analog signal area integrates the signal comparison unit of the pressure control module 803. The functional sub-area integrates the connection lines of the frequency converter 7, rectifier module 701, and filter module 702. An aluminum foil shielding layer is provided between the signal layer and the ground layer, connected to the ground layer through vias to reduce electromagnetic interference.

[0041] The temperature sensor 5 of the temperature acquisition module is a DS18B20 digital temperature sensor. One sensor is set in each water supply section and return section of each secondary heating pipeline 3, or it can be set separately in the water supply section or the return section. It is used to collect the inlet water temperature and return water temperature at the user end. The DQ pin (signal output terminal) of the temperature sensor 5 is connected to the signal acquisition terminal of the main control module 8 through a single bus. The temperature setting module 802 uses an AT24C02 E2PROM storage chip and is connected to the main control module 8 through an I2C bus. It is used to store the preset temperature of the medium in the secondary heating pipeline 3.

[0042] Pressure sensor 6 is a piezoresistive pressure sensor of model MPX5010. One is installed at the water supply end of the primary heating pipe 2 and the water supply end of the secondary heating pipe 3. The OUT pin (signal output terminal) of pressure sensor 6 is connected to operational amplifier 804 in the analog signal area of ​​the double-layer PCB board through copper foil lines. The signal comparison unit of pressure control module 803 is operational amplifier 804 of model LM324. The non-inverting input terminal of operational amplifier 804 is connected to the signal output terminal of pressure sensor 6, and the inverting input terminal is connected to the signal output terminal of pressure setting module 806 through copper foil lines. The output terminal of operational amplifier 804 is connected to the ADC acquisition terminal of main control module 8 through RC filter circuit 805. The filtering logic of RC filter circuit 805 is a conventional design of existing RC low-pass filter, used to filter out high-frequency noise in pressure sensing data, without any circuit structure improvement. Pressure setting module 806 uses the same AT24C02 memory chip as temperature setting module 802 and communicates with main control module 8 through I2C bus.

[0043] The primary water supply pump 201, primary return water pump 202, secondary water supply pump 301, and secondary return water pump 302 are all ISG50-160 vertical pipeline centrifugal pumps. Their motor control terminals are electrically connected to the output terminals of corresponding frequency converters 7. Frequency converters 7 are ACS510 general-purpose frequency converters, with one frequency converter 7 corresponding to each pump. The signal input terminal of the frequency converter 7 is connected to the control terminal of the frequency converter 7 in the main control module 8 via a dedicated control line, supporting the reception of signals from the main control module 8. Speed ​​regulation signal; Rectifier module 701 uses a single-phase bridge rectifier of model KBPC3510, whose input terminal is electrically connected to the output terminal of inverter 7, and is used to rectify the AC power output by inverter 7 into DC power; Filter module 702 uses an electrolytic capacitor of model CD137, whose input terminal is electrically connected to the output terminal of rectifier module 701, and whose output terminal is electrically connected to the water pump motor control terminal; Rectifier module 701, filter module 702 and inverter 7 are integrated together in the functional sub-area of ​​a double-layer PCB board.

[0044] The remote communication module 807 uses a SIM800C GPRS module, integrated on the PCB board of the main control module 8. It communicates with the main control module 8 via a UART serial port, supporting the uploading of temperature sensing data, timer 9 operating status data, and pressure data to the remote control platform 808. It also receives timer 9 delay duration adjustment commands from the remote control platform 808. The remote control platform 808 is a monitoring interface built on existing industrial control software, used for data reception, command issuance, and visualization. The cloud storage module 809 uses Alibaba Cloud OSS cloud storage service. Its signal input end communicates with the signal output end of the remote control platform 808 via Ethernet, used to store various operating data received by the remote control platform 808. On-site images are captured by network cameras located at the heat exchange station. These cameras are conventional industrial network cameras, connected to the remote control platform 808 via a switch, used to assist in monitoring equipment operating status.

[0045] System workflow: 1. Secondary side temperature control Temperature sensor 5 collects the supply and return water temperatures of the secondary heating pipeline 3 in real time and transmits the temperature sensing data to the temperature control module 801 of the main control module 8. Temperature control module 801 calls the preset temperature stored in temperature setting module 802, calculates the difference between the actual temperature and the preset temperature, and if the difference exceeds the threshold, it sends a "heating required" signal to the main control module 8.

[0046] After receiving the "heating required" signal, the main control module 8 sends a delay duration to the built-in timer 9 and simultaneously sends an "increase speed" signal to the frequency converters 7 of some secondary heating pipelines 3 to start the corresponding secondary water supply pump 301 and secondary return water pump 302 to heat up. The timer 9 starts timing, and after the preset delay duration is reached, it outputs a trigger signal to the main control module 8. The main control module 8 then sends an "increase speed" signal to the frequency converters 7 of the remaining secondary heating pipelines 3 to achieve batch start-up.

[0047] Pressure sensor 6 collects the water supply pressure of the secondary heating pipeline 3 in real time and transmits the pressure sensing data to pressure control module 803. Pressure control module 803 calls the preset pressure of pressure setting module 806. If the actual pressure does not reach the preset value during the pressurization process, main control module 8 calls the liquid level data of liquid level acquisition module 404. If the liquid level is higher than the low liquid level threshold of water tank 401, it controls water replenishment pump 403 to start and replenish water to secondary heating pipeline 3 through water replenishment pipeline 402 until the pressure reaches the preset value. If the liquid level is lower than the low liquid level threshold, it first triggers a local warning, prompting the water tank 401 to replenish water before starting water replenishment pump 403.

[0048] 2. Secondary side cooling control Temperature sensor 5 collects the supply and return water temperatures on the secondary side. If the actual temperature is higher than the preset temperature and the difference exceeds the threshold, temperature control module 801 sends a "cooling down" signal to main control module 8.

[0049] The main control module 8 sends a delay duration to the timer 9, first sending a "reduce speed" signal to the frequency converters 7 of some secondary heating pipelines 3, with the speed reduction corresponding to the secondary water supply pump 301 and the secondary return water pump 302. After the timer 9 reaches the target, it sends a reduce speed signal to the frequency converters 7 of the remaining secondary heating pipelines 3 to achieve batch control.

[0050] Pressure sensor 6 collects the secondary side water supply pressure. If the actual pressure is lower than the preset pressure, the pressure control module 803 sends a signal to the main control module 8 that the pressure needs to be increased. The main control module 8 increases the speed of the remaining running frequency converter 7 until the pressure reaches the preset value. If the pressure drops suddenly during the pressure reduction process, the water replenishment pump 403 is started to replenish water according to the above water replenishment logic to ensure pressure stability.

[0051] 3. Primary side auxiliary temperature control The primary heating pipeline 2 is also equipped with a temperature sensor 5. If the secondary side temperature collected by the temperature sensor 5 still does not reach the preset value after all the frequency converters 7 of the secondary heating pipelines 3 have completed batch adjustment (heating or cooling), the main control module 8 sends an adjustment signal to the frequency converter 7 of the primary heating pipeline 2: when heating is required, increase the speed of the primary water supply pump 201 and the primary return water pump 202 to increase the primary side medium flow rate and improve the heat exchange efficiency of the heat exchanger; when cooling is required, decrease the speed of the primary water supply pump 201 and the primary return water pump 202 to reduce the primary side medium flow rate and reduce the heat exchange efficiency until the secondary side temperature reaches the preset value.

[0052] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A control system for a centralized heating heat exchange station, characterized in that, include: The main body (1) of the heat exchange station includes a primary heating pipeline (2) and at least one secondary heating pipeline (3), wherein the primary heating pipeline (2) and the secondary heating pipeline (3) exchange heat through a heat exchanger; The execution components include a primary water supply pump (201) and a primary return water pump (202) installed on the primary side heating pipeline (2), and a secondary water supply pump (301) and a secondary return water pump (302) installed on the secondary side heating pipeline (3). The temperature acquisition module includes a temperature sensor (5) installed on the secondary heating pipeline (3); Temperature setting module (802) stores the preset temperature of the medium in the secondary heating pipeline (3); The main control module (8) integrates a temperature control module (801). The signal input terminal of the temperature control module (801) is connected to the temperature acquisition module to receive temperature sensing data, and the signal calling terminal is connected to the temperature setting module (802) to obtain a preset temperature. The main control module (8) is connected to a timer (9) for timing and triggering the temperature control module (801).

2. The centralized heating heat exchange station control system according to claim 1, characterized in that, Pressure sensors (6) are provided on the primary heating pipeline (2) and the secondary heating pipeline (3). The signal output end of the pressure sensor (6) is connected to the main control module (8) to transmit the pressure sensing data of the medium in the primary heating pipeline (2) and the secondary heating pipeline (3) to the main control module (8).

3. The centralized heating heat exchange station control system according to claim 2, characterized in that, The execution component also includes a frequency converter (7), which is connected to the primary water supply pump (201), the primary return water pump (202), the secondary water supply pump (301), and the secondary return water pump (302) respectively. The signal input terminal of the frequency converter (7) is communicatively connected to the signal output terminal of the main control module (8).

4. The centralized heating heat exchange station control system according to claim 3, characterized in that, The main control module (8) integrates a pressure control module (803). The signal input terminal of the pressure control module (803) is connected to the pressure sensor (6) to receive pressure sensing data of the medium. The signal call terminal is connected to the pressure setting module (806) to obtain the preset pressure. The pressure setting module (806) is used to store the preset pressure of the medium in the primary heating pipeline (2) and the secondary heating pipeline (3).

5. The centralized heating heat exchange station control system according to claim 4, characterized in that, The secondary heating pipeline (3) is equipped with a water replenishment component (4). The water replenishment component (4) includes a water reservoir (401), a water replenishment pipe (402), and a water replenishment pump (403). The water reservoir (401) is connected to the secondary heating pipeline (3) through the water replenishment pipe (402). The water replenishment pump (403) is located on the water replenishment pipe (402). The signal input terminal of the water replenishment pump (403) is communicatively connected to the signal output terminal of the main control module (8).

6. The centralized heating heat exchange station control system according to claim 5, characterized in that, The water replenishment component (4) also includes a liquid level acquisition module (404), which is located inside the water reservoir (401). The signal output terminal of the liquid level acquisition module (404) is connected to the main control module (8) to transmit the liquid level data of the medium inside the water reservoir (401) to the main control module (8).

7. The centralized heating heat exchange station control system according to claim 6, characterized in that, The main control module (8) integrates a remote communication module (807), and the main control module (8) communicates with the remote control platform (808) through the remote communication module (807). The signal output terminal of the remote control platform (808) is connected to the cloud storage module (809).

8. The centralized heating heat exchange station control system according to claim 7, characterized in that, The signal output terminal of the temperature sensor (5) is connected to the signal acquisition terminal of the main control module (8) via a single bus. The signal transmission line between the temperature sensor (5) and the main control module (8) is integrated on the signal layer of the double-layer PCB board. The double-layer PCB board provides an integrated mounting carrier for the temperature acquisition module, the temperature control module (801) and the timer (9). The three are interconnected by the copper foil lines on the PCB board.

9. The centralized heating heat exchange station control system according to claim 8, characterized in that, The signal comparison unit of the pressure control module (803) includes an operational amplifier (804), which is integrated in the analog signal area of ​​the double-layer PCB board. The non-inverting input terminal of the operational amplifier (804) is connected to the signal output terminal of the pressure sensor (6) through a copper foil line, and the inverting input terminal is connected to the preset pressure output terminal of the pressure setting module (806). The output terminal of the operational amplifier (804) is connected to the ADC acquisition terminal of the main control module (8) through an RC filter circuit (805) to filter out high-frequency noise in the pressure sensing data.

10. The centralized heating heat exchange station control system according to claim 9, characterized in that, The frequency converter (7) of the execution component is provided with a rectifier module (701) and a filter module (702) between it and the corresponding water pump. The input end of the rectifier module (701) is electrically connected to the output end of the frequency converter (7), and the output end of the filter module (702) is electrically connected to the motor control end of the water pump. The rectifier module (701), the filter module (702) and the frequency converter (7) are integrated together in the functional sub-area of ​​the double-layer PCB board. The functional sub-area is connected to the power supply end of the main control module (8) through the power supply line, and is connected to the control end of the frequency converter (7) of the main control module (8) through the control line.

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