Railway vehicle cargo area constant temperature control circuit and method

Abstract

The invention discloses a railway vehicle cargo area constant temperature control circuit and method. The circuit comprises a first battery, a generator set, an inverter, an air conditioner, a charger, a second battery, a man-machine interaction module, a system controller, a first battery controller, a generator set controller, a charger controller, an air conditioner controller, a second battery controller and a power-on switch. The circuit and the method can effectively control the temperature of the railway vehicle cargo area and prolong the cargo storage time as much as possible.

Description

Technical Field

[0001] The present invention relates to a constant temperature control circuit and method for the cargo area of a railway vehicle. Background Art

[0002] At present, when transporting important goods by railway vehicles in China, the temperature in the cargo area needs to be maintained within a certain range. When the railway vehicle has no external power supply and the goods need to be stored in the railway vehicle for a long time, the diesel generator set or battery of the railway vehicle itself needs to provide electrical energy. Since the energy provided by the diesel generator set is limited by the size of the fuel tank, and the energy provided by the battery is also limited, it is necessary to minimize energy consumption during the storage of the goods to ensure that the storage time of the goods is extended as much as possible with limited energy. Summary of the Invention

[0003] The present invention provides a constant temperature control circuit and method for the cargo area of a railway vehicle to extend the storage time of the goods in the railway vehicle as much as possible.

[0004] The present invention adopts the following technical solution: A constant temperature control circuit for the cargo area of a railway vehicle, comprising: a first battery, a generator set, an inverter, an air conditioner, a charger, a second battery, a human-machine interaction module, a system controller, a first battery controller, a generator set controller, a charger controller, an air conditioner controller, a second battery controller, and a power-on switch;

[0005] The inverter is connected to the first battery, the air conditioner, and the charger, and is used to convert the first DC power supply voltage provided by the first battery into a three-phase AC power supply and supply power to the air conditioner and the charger;

[0006] The generator set is connected to the air conditioner and the charger, and is used to supply the three-phase AC power generated by the generator set to the air conditioner and the charger;

[0007] The charger is connected to the human-machine interaction module, the system controller, the generator set controller, the first battery controller, the charger controller, the air conditioner controller, the second battery, and the second battery controller, and is used to supply power to the human-machine interaction module, the system controller, the generator set controller, the first battery controller, the charger controller, the air conditioner controller, the second battery, and the second battery controller;

[0008] The second battery is connected to the power-on switch, the human-machine interaction module, the system controller, the generator set controller, the first battery controller, the charger controller, the air conditioner controller, and the second battery controller to supply power to the human-machine interaction module, the system controller, the generator set controller, the first battery controller, the charger controller, the air conditioner controller, and the second battery controller under the trigger of the power-on switch;

[0009] The system controller is communicatively connected to the air conditioner controller, the second battery controller, the generator set controller, the first battery controller, the charger controller, the inverter, and the human-machine interaction module.

[0010] Optionally, the output voltage of the first battery is in the range of DC500V to DC680V.

[0011] Optionally, the output voltage of the second battery is in the range of DC77V to DC120V.

[0012] Optionally, the output voltage of the generator set is AC380V ± 5%, and the frequency is 50 ± 1Hz.

[0013] Optionally, the output voltage of the inverter is AC380V ± 5%, and the frequency is 50 ± 1Hz.

[0014] Optionally, the human-machine interaction module includes a touch screen.

[0015] Optionally, the system controller communicates using the RS485 communication protocol.

[0016] The present invention adopts the following technical solution: A constant temperature control method applied to the constant temperature control circuit of the cargo area of the above-mentioned railway vehicle, including:

[0017] In response to the human-machine interaction module sending an instruction to enter the constant temperature mode to the system controller, the system controller queries the temperature of the cargo area from the air conditioner controller;

[0018] The second battery controller sends the battery voltage and the percentage of the remaining battery power to the total battery power to the system controller in real time, and the percentage is denoted as SOC;

[0019] When the temperature in the cargo area is greater than the set upper temperature threshold, or the temperature in the cargo area is less than the set lower temperature threshold, or the SOC is less than the set percentage, or the battery voltage is less than the set voltage value, the system controller preferentially sends a start command to the generator set controller to start the generator set. When the system controller determines that the start of the generator set fails, the system controller sends a power supply command to the first battery controller to start the first battery to supply power externally. When the system controller determines that the external power supply of the first battery fails, the system controller sends an alarm message to the human-machine interaction module so that the human-machine interaction module alarms the user.

[0020] Optionally, it further includes: after the generator set or the first battery supplies power normally, the charger starts to charge the second battery. And when the temperature in the cargo area is greater than the set upper temperature threshold, the system controller sends a cooling command to the air conditioner controller and indicates the target temperature. When the temperature in the cargo area is less than the set lower temperature threshold, the system controller sends a heating command to the air conditioner controller and indicates the target temperature.

[0021] Optionally, it further includes:

[0022] When the air conditioner is in the cooling mode, when the temperature in the cargo area is less than or equal to the target temperature and the power of the second battery is greater than or equal to the set power threshold, the system controller sends a stop command to the air conditioner controller, and after a set delay duration, sends a stop power supply command to the first battery controller or the generator set controller corresponding to one of the first battery and the generator set that is currently in the power supply state;

[0023] When the air conditioner is in the heating mode, when the temperature in the cargo area is greater than or equal to the target temperature and the power of the second battery is greater than or equal to the set power threshold, the system controller sends a stop command to the air conditioner controller, and after a set delay duration, sends a stop power supply command to the first battery controller or the generator set controller corresponding to one of the first battery and the generator set that is currently in the power supply state.

[0024] This circuit and method can effectively control the temperature in the cargo area of railway vehicles and extend the storage time of goods as much as possible. Description of the Drawings

[0025] Figure 1 It is the circuit diagram of the constant temperature control circuit for the cargo area of railway vehicles provided by the present invention. Detailed Embodiments

[0026] The present invention will be further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0027] Reference Figure 1 , an embodiment of the present invention provides a constant temperature control circuit for the cargo area of a railway vehicle, including: a first battery, a generator set, an inverter, an air conditioner, a charger, a second battery, a human-machine interaction module, a system controller, a first battery controller, a generator set controller, a charger controller, an air conditioner controller, a second battery controller, and a power-on switch.

[0028] The inverter is connected to the first battery, the air conditioner, and the charger, and is used to convert the first DC power supply voltage provided by the first battery into a three-phase AC power supply and supply power to the air conditioner and the charger.

[0029] The generator set is connected to the air conditioner and the charger, and is used to supply the three-phase AC power generated by the generator set to the air conditioner and the charger.

[0030] The charger is connected to the human-machine interaction module, the system controller, the generator set controller, the first battery controller, the charger controller, the air conditioner controller, the second battery, and the second battery controller, and is used to supply power to the human-machine interaction module, the system controller, the generator set controller, the first battery controller, the charger controller, the air conditioner controller, the second battery, and the second battery controller.

[0031] The second battery is connected to the power-on switch, the human-machine interaction module, the system controller, the generator set controller, the first battery controller, the charger controller, the air conditioner controller, and the second battery controller, and is used to supply power to the human-machine interaction module, the system controller, the generator set controller, the first battery controller, the charger controller, the air conditioner controller, and the second battery controller under the trigger of the power-on switch.

[0032] The system controller is communicatively connected to the air conditioner controller, the second battery controller, the generator set controller, the first battery controller, the charger controller, the inverter, and the human-machine interaction module.

[0033] Optionally, the output voltage of the first battery is in the range of DC500V to DC680V.

[0034] Optionally, the output voltage of the second battery is in the range of DC77V to DC120V.

[0035] Optionally, the output voltage of the generator set is AC380V±5%, and the frequency is 50±1Hz.

[0036] Optionally, the output voltage of the inverter is AC380V±5%, and the frequency is 50±1Hz.

[0037] Optionally, the human-machine interaction module includes a touch screen.

[0038] Optionally, the system controller uses the RS485 communication protocol for communication.

[0039] The present invention adopts the following technical solution: A constant temperature control method applied to the constant temperature control circuit of the cargo area of the above-mentioned railway vehicle, including:

[0040] In response to the human-machine interaction module sending an instruction to enter the constant temperature mode to the system controller, the system controller queries the temperature of the cargo area from the air conditioner controller;

[0041] The second battery controller sends the battery voltage and the percentage of the remaining battery power to the total battery power to the system controller in real time, and the percentage is denoted as SOC;

[0042] When the temperature of the cargo area is greater than the set upper temperature threshold value, or the temperature of the cargo area is less than the set lower temperature threshold value, or the SOC is less than the set percentage, or the battery voltage is less than the set voltage value, the system controller preferentially sends a start instruction to the generator set controller to start the generator set. When the system controller determines that the start of the generator set fails, the system controller sends a power supply instruction to the first battery controller to start the first battery to supply power externally. When the system controller determines that the external power supply of the first battery fails, the system controller sends an alarm message to the human-machine interaction module so that the human-machine interaction module alarms the user.

[0043] Optionally, it further includes: After the generator set or the first battery supplies power externally normally, the charger starts to charge the second battery. And when the temperature of the cargo area is greater than the set upper temperature threshold value, the system controller sends a refrigeration instruction and indicates the target temperature to the air conditioner controller. When the temperature of the cargo area is less than the set lower temperature threshold value, the system controller sends a heating instruction and indicates the target temperature to the air conditioner controller.

[0044] Optionally, it further includes: When the air conditioner is in the refrigeration mode, when the temperature of the cargo area is less than or equal to the target temperature and the power of the second battery is greater than or equal to the set power threshold value, the system controller sends a stop instruction to the air conditioner controller, and after a set delay duration, sends a stop power supply instruction to the first battery controller or the generator set controller corresponding to one of the first battery and the generator set that is currently in the power supply state;

[0045] When the air conditioner is in the heating mode, when the temperature of the cargo area is greater than or equal to the target temperature and the power of the second battery is greater than or equal to the set power threshold value, the system controller sends a stop instruction to the air conditioner controller, and after a set delay duration, sends a stop power supply instruction to the first battery controller or the generator set controller corresponding to one of the first battery and the generator set that is currently in the power supply state.

[0046] In an exemplary embodiment, the target temperature is 20 °C, the upper temperature threshold value is 25 °C, and the lower temperature threshold value is 15 °C.

[0047] The information sent by the air conditioner controller to the system controller includes: the temperature of the cargo area, the air conditioner cooling mode, the air conditioner heating mode, and the air conditioner fault information.

[0048] The information sent by the system controller to the air conditioner controller includes: the instruction to enter the constant temperature control mode, the air conditioner cooling instruction, the air conditioner heating instruction, the target temperature, and the air conditioner shutdown instruction.

[0049] The information sent by the second battery controller to the system controller includes: SOC (the ratio of the remaining battery power to the total battery power), the total battery voltage, the battery charging state, the battery discharging state, and the battery fault information.

[0050] The information sent by the generator set controller to the system controller includes: the operation of the generator set, the successful startup of the generator set, the speed of the generator set, and the generator set fault information.

[0051] The information sent by the system controller to the generator set controller includes: the startup of the generator set and the shutdown of the generator set.

[0052] The information sent by the first battery controller to the system controller includes: SOC (the ratio of the remaining battery power to the total battery power), the battery charging state, the battery discharging state, and the battery fault information.

[0053] The information sent by the system controller to the first battery controller includes: the battery supplying power externally and the battery stopping supplying power.

[0054] The information sent by the charger controller to the system controller includes: the charger charging state and the charger fault information.

[0055] The information sent by the inverter to the system controller includes: the inverter state.

[0056] The information sent by the human-machine interaction module to the system controller includes: entering the constant temperature control mode and exiting the constant temperature control mode.

[0057] The information sent by the system controller to the human-machine interaction module includes: all the status information and fault information received by the system controller.

[0058] The following describes the complete working process. Among them, the first battery is a DC600V battery pack, the generator set is a diesel generator set, the inverter is a DC600V / AC380V inverter, the charger is a DC110V charger, the second battery is a DC110V battery, the human-machine interaction module is a touch screen, the system controller is a programmable logic controller (PLC), the first battery controller is the battery management system BMS of the DC600V battery pack (abbreviated as DC600V battery BMS), the second battery controller is the DC110V battery BMS, the charger controller is the DC110V charger controller, and the generator set controller is the diesel engine set controller.

[0059] (1) Initial power-on

[0060] The staff operates the power-on switch. The DC110V battery receives the passive dry contact signal of the power-on switch and delivers DC110V electric energy outward. It provides low-voltage power supply for the air-conditioning controller, DC110V charger controller, DC600V battery BMS, diesel engine set controller, and PLC. At this time, the air conditioner, DC110V charger, DC600V battery, diesel engine, and PLC enter the standby state. The status information of each device can be viewed through the touch screen.

[0061] (2) Enter the constant temperature control mode

[0062] The staff clicks the button to enter the constant temperature control mode on the touch screen. The PLC receives the instruction information sent by the touch screen and sends the information to the air-conditioning controller. The air-conditioning controller monitors the temperature in the cargo area in real time and sends the real-time temperature value to the PLC through communication. At the same time, the DC110V battery BMS sends the SOC to the PLC in real time through communication.

[0063] (3) Start the power supply of the high-voltage supply loop

[0064] The PLC judges the temperature in the cargo area, the SOC and the total voltage of the DC110V battery.

[0065] When the temperature in the cargo area > 25°C ∪ the temperature in the cargo area < 15°C ∪ the SOC of the DC110V battery < 30% ∪ the total voltage of the DC110V battery < 92V, the PLC sends a diesel engine start command to the diesel engine controller. The diesel engine controller controls the diesel engine to start and supplies power to the high-voltage circuit. After the PLC sends the diesel engine start command, it starts timing. If the diesel engine speed is less than 600 r / min and the diesel engine start success is not received after 10 s, it is considered that the diesel engine start fails this time. After a 30-s interval, the PLC sends the diesel engine start command to the diesel engine controller again. If the diesel engine fails to start continuously three times, the PLC will no longer send a start command to the diesel engine for the high-voltage circuit power supply this time. At this time, the PLC will send a battery external power supply command to the DC600V battery BMS, and the DC600V battery will supply power externally and supply power to the high-voltage circuit through an inverter. After the PLC sends the battery external power supply command, it starts timing. If the battery discharge state is not received after 10 s, it is considered that the DC600V power supply start fails this time. The PLC sends an alarm message to the touch screen, and the touch screen pops up an alarm and drives the buzzer to act.

[0066] (4) The air conditioner works and charges the DC110V.

[0067] After the high-voltage power supply is normal, the DC110V charger automatically charges the DC110V battery.

[0068] When the temperature in the cargo area > 25°C, the PLC sends an air conditioner cooling command to the air conditioner controller, with a target temperature of 20°C, and the air conditioner starts to cool the cargo area.

[0069] When the temperature in the cargo area < 15°C, the PLC sends an air conditioner heating command to the air conditioner controller, with a target temperature of 20°C, and the air conditioner starts to heat the cargo area.

[0070] (5) Stop the power supply of the high-voltage power supply circuit

[0071] The PLC judges the temperature in the cargo area, the SOC of the DC110V battery, and the total voltage.

[0072] When the air conditioner is in the cooling mode, the temperature in the cargo area ≤ 20°C ∩ the SOC of the DC110V battery ≥ 95% or when the air conditioner is in the heating mode, the temperature in the cargo area ≥ 20°C ∩ the SOC of the DC110V battery ≥ 95%, the PLC sends an air conditioner stop command to the air conditioner controller and sends a diesel engine stop command or a battery stop power supply command after a 10-s delay.

[0073] (6) Repeat step (2), and the constant temperature control mode can be entered without the need for staff operation to trigger.

[0074] (7) Exit the constant temperature control mode.

[0075] The staff operates the button to exit the constant temperature control mode on the touch screen, and the PLC ends the above control.

[0076] This circuit and method can effectively control the temperature of the cargo area of railway vehicles and extend the storage time of the cargo as much as possible.

[0077] Each embodiment in the present invention is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0078] The protection scope of the present invention is not limited to the above embodiments. Obviously, those skilled in the art can make various changes and deformations to the present invention without departing from the scope and spirit of the present invention. If these changes and deformations belong to the scope of the claims of the present invention and their equivalent technologies, the intention of the present invention also includes these changes and deformations.

Claims

1. A constant temperature control circuit for the cargo area of a railway vehicle, characterized in that, it includes: a first battery, a generator set, an inverter, an air conditioner, a charger, a second battery, a human-machine interaction module, a system controller, a first battery controller, a generator set controller, a charger controller, an air conditioner controller, a second battery controller, and a power-on switch; The inverter is connected to the first battery, the air conditioner, and the charger, and is used to convert the first DC power supply voltage provided by the first battery into a three-phase AC power supply and supply power to the air conditioner and the charger; The generator set is connected to the air conditioner and the charger, and is used to supply the three-phase AC power generated by the generator set to the air conditioner and the charger; The charger is connected to the human-machine interaction module, the system controller, the generator set controller, the first battery controller, the charger controller, the air conditioner controller, the second battery, and the second battery controller to supply power to the human-machine interaction module, the system controller, the generator set controller, the first battery controller, the charger controller, the air conditioner controller, the second battery, and the second battery controller; The second battery is connected to the power-on switch, the human-machine interaction module, the system controller, the generator set controller, the first battery controller, the charger controller, the air conditioner controller, and the second battery controller to supply power to the human-machine interaction module, the system controller, the generator set controller, the first battery controller, the charger controller, the air conditioner controller, and the second battery controller under the trigger of the power-on switch; The system controller is communicatively connected to the air conditioner controller, the second battery controller, the generator set controller, the first battery controller, the charger controller, the inverter, and the human-machine interaction module.

2. The circuit according to claim 1, characterized in that, the output voltage of the first battery is in the range of DC500V to DC680V.

3. The circuit according to claim 1, characterized in that, the output voltage of the second battery is in the range of DC77V to DC120V.

4. The circuit according to claim 1, characterized in that, the output voltage of the generator set is AC380V ± 5%, and the frequency is 50 ± 1Hz.

5. The circuit according to claim 1, characterized in that, the output voltage of the inverter is AC380V ± 5%, and the frequency is 50 ± 1Hz.

6. The circuit according to claim 1, characterized in that, the human-machine interaction module includes a touch screen.

7. The circuit according to claim 1, characterized in that, the system controller uses the RS485 communication protocol for communication.

8. A constant temperature control method applied to the constant temperature control circuit for the cargo area of a railway vehicle according to any one of claims 1 to 7, characterized in that, it includes: In response to the human-machine interaction module sending an instruction to enter the constant temperature mode to the system controller, the system controller queries the temperature of the cargo area from the air conditioner controller; The second battery controller sends the battery voltage and the percentage of the remaining battery power to the total battery power to the system controller in real time, and this percentage is denoted as SOC; When the temperature of the cargo area is greater than the set upper temperature threshold, or the temperature of the cargo area is less than the set lower temperature threshold, or the SOC is less than the set percentage, or the battery voltage is less than the set voltage value, the system controller preferentially sends a start instruction to the generator set controller to start the generator set. When the system controller determines that the start of the generator set fails, the system controller sends a power supply instruction to the first battery controller to start the first battery to supply power externally. When the system controller determines that the external power supply of the first battery fails, the system controller sends an alarm message to the human-machine interaction module so that the human-machine interaction module alarms the user.

9. The constant temperature control method according to claim 8, characterized in that, further comprising: After the generator set or the first battery supplies power normally, the charger starts to charge the second battery. And when the temperature of the cargo area is greater than the set upper temperature threshold, the system controller sends a cooling instruction and indicates the target temperature to the air conditioner controller. When the temperature of the cargo area is less than the set lower temperature threshold, the system controller sends a heating instruction and indicates the target temperature to the air conditioner controller.

10. The constant temperature control method according to claim 8, characterized in that, further comprising: When the air conditioner is in the cooling mode, when the temperature of the cargo area is less than or equal to the target temperature and the power of the second battery is greater than or equal to the set power threshold, the system controller sends a stop instruction to the air conditioner controller, and after a set delay duration, sends a stop power supply instruction to the first battery controller or the generator set controller corresponding to one of the first battery and the generator set that is currently in the power supply state; When the air conditioner is in the heating mode, when the temperature of the cargo area is greater than or equal to the target temperature and the power of the second battery is greater than or equal to the set power threshold, the system controller sends a stop instruction to the air conditioner controller, and after a set delay duration, sends a stop power supply instruction to the first battery controller or the generator set controller corresponding to one of the first battery and the generator set that is currently in the power supply state.

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