A kind of automatic control device for water flow and water temperature of extended-range engine bench

Abstract

This utility model discloses an automatic control device for water flow and temperature on a range-extended engine test bench, relating to the control of water flow and temperature on a range-extended engine test bench. It includes a measurement and control module, an external circulation water circuit, a heat exchanger, and a range extender body. The measurement and control module includes a first proportional valve control module and a second proportional valve control module. A first proportional valve is installed between the range extender body and the heat exchanger, and a second proportional valve is installed between the heat exchanger and the external circulation water circuit. This automatic control device for water flow and temperature on a range-extended engine test bench utilizes the measurement and control module to automatically adjust the opening of the second and first proportional valves, enabling rapid control of the water flow to the desired value. Water temperature control follows the same principle. This device allows for remote automatic adjustment of the water flow through the measurement and control module. Compared to manual ball valve adjustment, this significantly reduces adjustment time and improves accuracy, while also ensuring personnel safety.

Description

Technical Field

[0001] This utility model relates to the field of water flow and water temperature control for range-extended engine test benches, and particularly to an automatic control device for water flow and water temperature of range-extended engine test benches. Background Technology

[0002] Range extender engine, a type of pure electric drive engine for electric vehicles, electric bicycles, and electric motorcycles equipped with ground charging and on-board power supply functions.

[0003] Unlike traditional engines, range-extended electric motors need to be connected in series with the drive motor, which means that the electric water pump in its cooling system is supplied with a high current. Therefore, during bench testing, in addition to controlling the water temperature, the water flow rate in the cooling system should also be controlled within different operating speed ranges to avoid excessive or insufficient water flow, which could damage the electric water pump or even cause leakage leading to a short circuit in the electrical system.

[0004] Therefore, it is necessary to propose an automatic control device for water flow and water temperature on a range-extended engine test bench to solve the above problems. Utility Model Content

[0005] The main objective of this invention is to provide an automatic control device for water flow and water temperature on a range-extended engine test bench, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An automatic control device for water flow and water temperature on a range-extended engine test bench includes a measurement and control module, an external circulation water circuit, a heat exchanger, and a range extender body. The measurement and control module includes a first proportional valve control module and a second proportional valve control module. A first proportional valve is provided between the range extender body and the heat exchanger, and a second proportional valve is provided between the heat exchanger and the external circulation water circuit.

[0008] Preferably, the range extender body is connected to the heat exchanger through a first explosion-proof pipe. A third ball valve and a degassing throttle valve are connected to the outer flange of the first explosion-proof pipe. The first proportional valve flange is connected to the outer wall of the first explosion-proof pipe. A temperature sensor and a flow meter are installed at the first explosion-proof pipe.

[0009] Preferably, both the temperature sensor and the flow meter are electrically connected to the measurement and control module. The temperature sensor is used to provide feedback on the temperature of the water in the first explosion-proof pipe, and the flow meter is used to provide feedback on the water flow rate in the first explosion-proof pipe. The first proportional valve adjusts the flow rate based on the water flow rate through the measurement and control module.

[0010] Preferably, a water pump is installed at the range extender body, a second explosion-proof pipe is installed at the water pump and the degassing throttle valve, an expansion tank is installed at the second explosion-proof pipe, the expansion tank is used for automatic pressure relief, a two-way pressure valve is installed in the expansion tank, the expansion tank is filled with coolant, and the pressure relief triggering conditions include temperature rise: coolant volume expansion; steam accumulation: high temperature generates water vapor, causing pressure to rise; pressure threshold: when the pressure relief threshold is exceeded.

[0011] Preferably, a third explosion-proof pipe, a fourth explosion-proof pipe, and a circulating explosion-proof pipe are respectively installed at the heat exchanger and the external circulating water circuit. A fourth ball valve and a second proportional valve are connected to the flange of the third explosion-proof pipe, and a first ball valve is connected to the flange of the fourth explosion-proof pipe. The circulating explosion-proof pipe is connected to the second proportional valve and the fourth explosion-proof pipe. A fifth explosion-proof pipe is also installed between the heat exchanger and the range extender body. The fifth explosion-proof pipe is connected to the water pump. A second ball valve is connected to the flange on the outer wall of the fifth explosion-proof pipe. An observation window is installed on the outer wall of the fifth explosion-proof pipe for observing whether there are air bubbles inside the fifth explosion-proof pipe.

[0012] Preferably, the input terminal of the first proportional valve control module is electrically connected to the output terminal of the flow setting module, and the input terminal of the second proportional valve control module is electrically connected to the output terminal of the temperature setting module. The first proportional valve control module is used to control the first proportional valve, and the second proportional valve control module is used to control the second proportional valve. The first proportional valve control module and the second proportional valve control module are used to control the flow rate and on / off state of the first and second proportional valves.

[0013] Preferably, a pressure sensor is also installed at the first explosion-proof pipe. The pressure sensor is used to monitor the coolant pressure in real time to prevent leakage or damage caused by overpressure in the first explosion-proof pipe. The pressure sensor is electrically connected to the measurement and control module.

[0014] The range extender body is also equipped with a backup electronic water pump. Both the backup electronic water pump and the water pump inlet are equipped with water filters. The backup electronic water pump serves as a redundant backup for the main water pump and automatically switches over when the backup electronic water pump fails, ensuring uninterrupted operation of the device and preventing water temperature runaway due to water pump failure.

[0015] A temperature display instrument is installed at the observation window, which is used to display the real-time water temperature locally.

[0016] Preferably, the input terminal of the measurement and control module is electrically connected to the output terminal of a multi-channel data acquisition module, the input terminal of the measurement and control module is electrically connected to the output terminal of a dual-redundant control module, and the output terminal of the measurement and control module is electrically connected to the input terminal of a remote communication module. The remote communication module supports WiFi and Bluetooth communication, allowing remote monitoring and adjustment of water flow and water temperature setpoints.

[0017] The multi-channel data acquisition module is electrically connected to the temperature sensor and the flow meter. The sampling frequency of the multi-channel data acquisition module is 1kHz, and it supports simultaneous acquisition of 8 channels to eliminate signal crosstalk.

[0018] The dual-redundant control module is connected in parallel to the first proportional valve control module and the second proportional valve control module to monitor the execution status of the first proportional valve control module and the second proportional valve control module in real time.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This automatic water flow and temperature control device for the range-extended engine bench includes a heat exchanger, a flow meter, a second proportional valve, a first proportional valve, a first ball valve, a second ball valve, a third ball valve, a fourth ball valve, a temperature sensor, a degassing throttle valve, and an observation window. The device feeds the flow meter readings back to a control module, which automatically adjusts the opening of the second and first proportional valves to quickly control the water flow to the desired value. Water temperature control works similarly. This device allows for remote automatic adjustment of the water flow through the control module. Compared to manual ball valve adjustment, this significantly reduces adjustment time and improves accuracy, while also ensuring personnel safety. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a system block diagram of this utility model;

[0023] Figure 3 This is a flowchart of the present invention.

[0024] In the diagram: 1. Measurement and control module; 2. External circulation water circuit; 3. Second proportional valve; 4. First ball valve; 5. Heat exchanger; 6. Second ball valve; 7. Observation window; 8. Range extender body; 9. Water pump; 10. Expansion tank; 11. Third ball valve; 12. Temperature sensor; 13. Degassing throttle valve; 14. Flow meter; 15. First proportional valve; 16. Fourth ball valve; 21. Pressure sensor; 22. Water filter; 23. Backup electronic water pump; 24. Temperature display instrument. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] Example 1:

[0027] like Figures 1-2 As shown, an automatic control device for water flow and temperature on a range-extended engine test bench includes a measurement and control module 1, an external circulation water circuit 2, a heat exchanger 5, and a range extender body 8. The measurement and control module 1 includes a first proportional valve control module and a second proportional valve control module. A first proportional valve 15 is installed between the range extender body 8 and the heat exchanger 5, and a second proportional valve 3 is installed between the heat exchanger 5 and the external circulation water circuit 2. The range extender body 8 is connected to the heat exchanger 5 through a first explosion-proof pipe. A third ball valve 11 and a degassing throttle valve 13 are connected to the outer flange of the first explosion-proof pipe. The first proportional valve 15 is flanged and connected to the outer wall of the first explosion-proof pipe. A temperature sensor 12 and a flow meter 14 are installed at the explosion-proof pipe. Both the temperature sensor 12 and the flow meter 14 are electrically connected to the measurement and control module 1. The temperature sensor 12 is used to provide feedback on the temperature of the water in the first explosion-proof pipe, and the flow meter 14 is used to provide feedback on the water flow rate in the first explosion-proof pipe. The first proportional valve 15 adjusts the flow rate based on the water flow rate through the measurement and control module 1. A water pump 9 is installed at the range extender body 8. A second explosion-proof pipe is installed at the water pump 9 and the degassing throttle valve 13. An expansion tank 10 is installed at the second explosion-proof pipe. The expansion tank 10 is used for automatic pressure relief. A two-way pressure valve is installed in the expansion tank 10. The kettle 10 is filled with coolant. The pressure relief trigger conditions include: temperature rise (coolant volume expansion); steam accumulation (high temperature generates water vapor, increasing pressure); and pressure threshold (when the pressure relief threshold is exceeded). A third explosion-proof pipe, a fourth explosion-proof pipe, and a circulating explosion-proof pipe are installed at the heat exchanger 5 and the external circulating water circuit 2, respectively. A fourth ball valve 16 and a second proportional valve 3 are flanged at the third explosion-proof pipe, and a first ball valve 4 is flanged at the fourth explosion-proof pipe. The circulating explosion-proof pipe is connected to the second proportional valve 3 and the fourth explosion-proof pipe. The input of the first proportional valve control module is electrically connected to the output of the flow setting module. The second proportional valve controls… The input terminal of the module is electrically connected to the output terminal of the temperature setting module. The first proportional valve control module is used to control the first proportional valve 15, the second proportional valve control module is used to control the second proportional valve 3, and the first proportional valve control module and the second proportional valve control module are used to control the flow rate and on / off state of the first proportional valve 15 and the second proportional valve 3. A fifth explosion-proof pipe is also installed between the heat exchanger 5 and the range extender body 8. The fifth explosion-proof pipe is connected to the water pump 9. The outer flange of the fifth explosion-proof pipe is connected to the second ball valve 6. An observation window 7 is installed on the outer wall of the fifth explosion-proof pipe. The observation window 7 is used to observe whether there are air bubbles inside the fifth explosion-proof pipe.

[0028] This device includes a heat exchanger 5, a flow meter 14, a second proportional valve 3, a first proportional valve 15, a first ball valve 4, a second ball valve 6, a third ball valve 11, a fourth ball valve 16, a temperature sensor 12, a degassing throttle valve 13, and an observation window 7. By feeding the value measured by the flow meter 14 back to the control module 1, the control module 1 automatically adjusts the opening of the second proportional valve 3 and the first proportional valve 15, so that the water flow can be quickly controlled to the current required value. The water temperature is controlled in the same way. This device can remotely and automatically adjust the water flow through the control module 1. Compared with the use of manual ball valve adjustment, it can greatly shorten the adjustment time and improve accuracy, and also ensure the safety of personnel.

[0029] The measurement and control module 1 includes a PID program.

[0030] Example 2:

[0031] like Figure 3 As shown, an automatic water flow and temperature control device for a range-extended engine test bench is described. In use, the first proportional valve 15 is fixed at 100% opening. The water flow and temperature are set through the flow setting module and the temperature setting module. The flow meter 14 and the temperature sensor 12 detect the water flow and temperature and feed them back to the measurement and control module 1. When the water temperature reaches the set temperature, the maximum water flow under the current operating condition is detected. Based on the set water flow, the first proportional valve 15 is switched back to automatic control. When the water temperature control is normal, it is observed whether the second proportional valve 3 is fully open. When it is fully open, the water flow at this time is the lower limit value of the operating condition.

[0032] When the second proportional valve 3 is not fully open, continue to reduce the required water flow value, and repeat the detection of water temperature and whether the second proportional valve 3 is fully open until the second proportional valve 3 is fully open.

[0033] When the water temperature control is abnormal, check whether the second proportional valve 3 is fully open. If not, it is determined that the second proportional valve 3 is faulty. If it is fully open, increase the water flow rate setting.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An automatic control device for water flow and water temperature on a range-extended engine test bench, comprising a measurement and control module (1), an external circulating water circuit (2), a heat exchanger (5), and a range extender body (8), characterized in that: The measurement and control module (1) includes a first proportional valve control module and a second proportional valve control module. A first proportional valve (15) is provided between the range extender body (8) and the heat exchanger (5), and a second proportional valve (3) is provided between the heat exchanger (5) and the external circulation water circuit (2).

2. The automatic control device for water flow and water temperature on a range-extended engine test bench according to claim 1, characterized in that: The range extender body (8) is connected to the heat exchanger (5) through the first explosion-proof pipe. The outer wall flange of the first explosion-proof pipe is connected to the third ball valve (11) and the degassing throttle valve (13). The flange of the first proportional valve (15) is connected to the outer wall of the first explosion-proof pipe. The first explosion-proof pipe is equipped with a temperature sensor (12) and a flow meter (14).

3. The automatic control device for water flow and water temperature on a range-extended engine test bench according to claim 2, characterized in that: The temperature sensor (12) and the flow meter (14) are both electrically connected to the measurement and control module (1). The temperature sensor (12) is used to provide feedback on the temperature of the water in the first explosion-proof pipe, and the flow meter (14) is used to provide feedback on the flow rate of the water in the first explosion-proof pipe. The first proportional valve (15) adjusts the flow rate based on the water flow rate through the measurement and control module (1).

4. The automatic control device for water flow and water temperature on a range-extended engine test bench according to claim 3, characterized in that: A water pump (9) is installed at the range extender body (8). A second explosion-proof pipe is installed at the water pump (9) and the degassing throttle valve (13). An expansion tank (10) is installed at the second explosion-proof pipe. The expansion tank (10) is used for automatic pressure relief. A two-way pressure valve is installed in the expansion tank (10). The expansion tank (10) is filled with coolant. The pressure relief triggering conditions include temperature rise: coolant volume expansion; steam accumulation: high temperature generates water vapor, causing pressure to rise; pressure threshold: when the pressure relief threshold is exceeded.

5. The automatic control device for water flow and water temperature on a range-extended engine test bench according to claim 4, characterized in that: The heat exchanger (5) and the external circulating water circuit (2) are respectively equipped with a third explosion-proof pipe, a fourth explosion-proof pipe and a circulating explosion-proof pipe. The flange of the third explosion-proof pipe is connected to a fourth ball valve (16) and a second proportional valve (3). The flange of the fourth explosion-proof pipe is connected to a first ball valve (4). The circulating explosion-proof pipe is connected to the second proportional valve (3) and the fourth explosion-proof pipe. A fifth explosion-proof pipe is also installed between the heat exchanger (5) and the range extender body (8). The fifth explosion-proof pipe is connected to the water pump (9). The flange of the outer wall of the fifth explosion-proof pipe is connected to a second ball valve (6). An observation window (7) is installed on the outer wall of the fifth explosion-proof pipe. The observation window (7) is used to observe whether there are air bubbles inside the fifth explosion-proof pipe.

6. The automatic control device for water flow and water temperature on a range-extended engine test bench according to claim 1, characterized in that: The input terminal of the first proportional valve control module is electrically connected to the output terminal of the flow setting module, and the input terminal of the second proportional valve control module is electrically connected to the output terminal of the temperature setting module. The first proportional valve control module is used to control the first proportional valve (15), and the second proportional valve control module is used to control the second proportional valve (3). The first proportional valve control module and the second proportional valve control module are used to control the flow rate and switching of the first proportional valve (15) and the second proportional valve (3).

7. The automatic control device for water flow and water temperature on a range-extended engine test bench according to claim 5, characterized in that: A pressure sensor is also installed at the first explosion-proof pipe. The pressure sensor is used to monitor the coolant pressure in real time to prevent the first explosion-proof pipe from leaking or being damaged due to overpressure. The pressure sensor is electrically connected to the measurement and control module (1). A backup electronic water pump (23) is also installed at the range extender body (8). A water filter (22) is installed at the inlet of both the backup electronic water pump (23) and the water pump (9). The backup electronic water pump (23) serves as a redundant backup of the main water pump (9) and automatically switches when the backup electronic water pump (23) fails. This is to ensure uninterrupted operation of the device and to prevent water temperature runaway due to water pump (9) failure. A temperature display instrument (24) is installed at the observation window (7), which is used to display the real-time water temperature locally.

8. The automatic control device for water flow and water temperature on a range-extended engine test bench according to claim 6, characterized in that: The input terminal of the measurement and control module (1) is electrically connected to the output terminal of a multi-channel data acquisition module. The input terminal of the measurement and control module (1) is electrically connected to the output terminal of a dual-redundant control module. The output terminal of the measurement and control module (1) is electrically connected to the input terminal of a remote communication module. The remote communication module supports WiFi and Bluetooth communication, and allows remote monitoring and adjustment of water flow and water temperature settings. The multi-channel data acquisition module is electrically connected to the temperature sensor (12) and the flow meter (14). The sampling frequency of the multi-channel data acquisition module is 1kHz, which supports 8-channel synchronous acquisition and eliminates signal crosstalk. The dual-redundant control module is connected in parallel to the first proportional valve control module and the second proportional valve control module to monitor the execution status of the first proportional valve control module and the second proportional valve control module in real time.

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