A heating system for a rail vehicle and a rail vehicle

Abstract

The application discloses a heating system of a rail vehicle and the rail vehicle, and belongs to the field of rail vehicles. In consideration of the power supply adjustment of the resistance heater based on the pressure regulating device, flexible temperature control can be realized. Therefore, in the application, the passenger room temperature of the rail vehicle is collected by a first temperature collecting module, and the controller can control the pressure regulating device according to the difference between the passenger room temperature and a preset target temperature, so that the passenger room temperature is equal to the preset target temperature. Therefore, the heating temperature can be flexibly adjusted by setting the preset target temperature. Since the resistance heater will not affect the heating effect due to the frosting problem, the heating stability is relatively high, and the fan can accelerate the spread of the heat of the resistance heater, so that the heating rate is improved.

Description

Technical Field

[0001] This invention relates to the field of rail vehicles, and in particular to a heating system for rail vehicles and rail vehicles themselves. Background Technology

[0002] To cope with low-temperature environments, rail vehicles have a heating requirement. However, there is a lack of mature heating systems for rail vehicles in the relevant technologies. Current heating systems for rail vehicles either have few heating levels or poor heating stability and low heating rate.

[0003] Therefore, how to provide a solution to the above-mentioned technical problems is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a heating system for a rail vehicle and the rail vehicle itself. The system collects the passenger compartment temperature of the rail vehicle through a first temperature acquisition module. The controller can control the pressure regulating device based on the difference between the passenger compartment temperature and the preset target temperature so that the passenger compartment temperature equals the preset target temperature. Therefore, the heating temperature can be flexibly adjusted by setting the preset target temperature. Since the resistance heater is not affected by frost, the heating effect is high, and the fan can accelerate the heat transfer of the resistance heater, thereby improving the heating rate.

[0005] To solve the above-mentioned technical problems, the present invention provides a heating system for rail vehicles, comprising: Power supply and fan; A voltage regulating device is used to regulate the power supply voltage and supply power to the resistance heater under the control of the controller; The first temperature acquisition module is used to collect the passenger compartment temperature of the rail vehicle; The controller is used to control the pressure regulating device based on the difference between the passenger room temperature and the preset target temperature, so that the passenger room temperature equals the preset target temperature; and to control the fan and resistance heater to work synchronously to accelerate heat transfer. Resistance heaters are used for heating by electricity.

[0006] On the other hand, the voltage regulating device includes a frequency converter or an inverter; The power source includes: First power supply unit; The power processing module connected to the first power supply unit is used to filter out electromagnetic interference in the output power of the first power supply unit and to regulate the voltage. If the first power supply unit is an AC power source, the voltage regulating device is a frequency converter; If the first power supply unit is a DC power supply, the voltage regulation device is an inverter.

[0007] On the other hand, the heating system of the rail vehicle also includes a low-pass filter; The low-pass filter is connected between the output terminal of the voltage regulator and the resistance heater to filter out high-frequency harmonic components in the output voltage of the voltage regulator.

[0008] On the other hand, the fan includes a second power supply unit, a time delay relay and the fan body; The first terminal of the time delay relay is connected to the second power supply unit, the second terminal of the time delay relay is connected to the fan body, and the control terminal of the time delay relay is connected to the controller. The synchronous operation of the control fan and the resistance heater includes: When the control resistor heater is started, the control delay relay is closed; when the control resistor heater is turned off, the control delay relay is turned off.

[0009] On the other hand, the resistance heater includes multiple resistance units; The multiple resistor units are evenly distributed along the length of the passenger compartment of the rail vehicle.

[0010] On the other hand, the heating system of the rail vehicle also includes: The second temperature acquisition module, located at the air outlet of the resistance heater, is used to acquire the first temperature value of the air outlet of the resistance heater. A third temperature acquisition module is installed on the surface of the resistance heater to acquire a second temperature value of the surface of the resistance heater. The controller is also used to reduce the output voltage of the voltage regulator or cut off the power supply to the resistance heater when the first temperature value or the second temperature value exceeds the corresponding preset safety threshold.

[0011] On the other hand, the power supply also includes: The overvoltage and overcurrent protection module connected in series at the output terminal of the first power supply unit is used to disconnect its own electrical connection when there is an overcurrent and / or overvoltage problem in the output power of the first power supply unit.

[0012] On the other hand, the heating system of the rail vehicle also includes: A temperature setting device connected to the controller is used to set the preset target temperature. The temperature setting device includes a host computer and a local human-computer interaction module.

[0013] On the other hand, the controller is also used for: Based on a preset correspondence, the rotation speed value corresponding to the difference between the passenger room temperature and the preset target temperature is determined, and the fan is controlled to run at the preset rotation speed value. The preset correspondence is a positive correlation between the difference between the cabin temperature and the preset target temperature and the rotation speed value.

[0014] To solve the above-mentioned technical problems, the present invention also provides a rail vehicle, including a rail vehicle body and a heating system of the rail vehicle as described above connected to the rail vehicle body.

[0015] Beneficial effects: This invention provides a heating system for rail vehicles. Considering that the power supply to the resistance heater is adjusted based on the voltage regulating device, flexible temperature control can be achieved. Therefore, in this invention, the passenger compartment temperature of the rail vehicle is collected by the first temperature acquisition module. The controller can control the voltage regulating device according to the difference between the passenger compartment temperature and the preset target temperature so that the passenger compartment temperature equals the preset target temperature. Therefore, the heating temperature can be flexibly adjusted by setting the preset target temperature. Since the resistance heater is not affected by frost, the heating stability is high. In addition, the fan can accelerate the heat transfer of the resistance heater, which can improve the heating rate.

[0016] The present invention also provides a rail vehicle that has the same beneficial effects as the heating system of the rail vehicle mentioned above. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the relevant technologies and the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a first structural schematic diagram of the heating system for a rail vehicle provided by the present invention; Figure 2 This is a schematic diagram of the second structure of the heating system for a rail vehicle provided by the present invention; Figure 3 This is a schematic diagram of the connection objects of the controller provided by the present invention. Detailed Implementation

[0019] The core of this invention is to provide a heating system for a rail vehicle and the rail vehicle itself. The system collects the passenger compartment temperature of the rail vehicle through a first temperature acquisition module. The controller can control the pressure regulating device based on the difference between the passenger compartment temperature and the preset target temperature so that the passenger compartment temperature equals the preset target temperature. Therefore, the heating temperature can be flexibly adjusted by setting the preset target temperature. Since the resistance heater is not affected by frost, the heating effect is high, and the fan can accelerate the heat transfer of the resistance heater, thereby improving the heating rate.

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please refer to Figure 1 , Figure 1 This is a first structural schematic diagram of a heating system for a rail vehicle provided by the present invention. The heating system for the rail vehicle includes: Power supply 1 and fan 6; The voltage regulating device 2 is used to regulate the voltage of the power supply 1 and supply power to the resistance heater 3 under the control of the controller 5; The first temperature acquisition module 4 is used to acquire the passenger compartment temperature of the rail vehicle; The controller 5 is used to control the pressure regulating device 2 based on the difference between the passenger room temperature and the preset target temperature, so that the passenger room temperature equals the preset target temperature; and to control the fan 6 and the resistance heater 3 to work synchronously to accelerate heat transfer. Resistance heater 3 is used for heating by electricity.

[0022] Specifically, considering the technical problems mentioned above, and taking into account the flexible temperature control achieved by adjusting the power supply to the resistance heater 3 based on the voltage regulating device 2, this invention aims to achieve flexible closed-loop temperature adjustment by controlling the voltage regulating device 2 to supply power to the resistance heater 3 through the controller 5. That is, the power supply 1 supplies power to the resistance heater 3 through the voltage regulating device 2, and the controller 5 can control the voltage regulating device 2 according to the difference between the room temperature and the preset target temperature so that the room temperature equals the preset target temperature, thereby achieving closed-loop temperature adjustment. The preset target temperature can be flexibly set to a large number of selectable temperature values, achieving stepless adjustment. On the other hand, in order to improve heat transfer efficiency, the controller 5 can also control the fan 6 to work synchronously with the resistance heater 3, thereby improving the heat transfer efficiency through the fan 6, that is, improving the heating rate.

[0023] The preset target temperature can be flexibly set, for example, it can be set to any value between 20°C and 30°C, and the step size can be less than 1°C, etc. The embodiments of the present invention are not limited here.

[0024] Specifically, the controller 5 can be of various types, such as a microcontroller programmable logic controller (PLC), etc., and this embodiment of the invention does not limit it.

[0025] The first temperature sensor may include multiple sensors, and each first temperature sensor may be evenly distributed in the passenger compartment. The controller 5 may use the average value of each first temperature sensor as the passenger compartment temperature.

[0026] This invention provides a heating system for rail vehicles. Considering that the power supply to the resistance heater is adjusted based on the voltage regulating device, flexible temperature control can be achieved. Therefore, in this invention, the passenger compartment temperature of the rail vehicle is collected by the first temperature acquisition module. The controller can control the voltage regulating device according to the difference between the passenger compartment temperature and the preset target temperature so that the passenger compartment temperature equals the preset target temperature. Therefore, the heating temperature can be flexibly adjusted by setting the preset target temperature. Since the resistance heater is not affected by frost, the heating stability is high. In addition, the fan can accelerate the heat transfer of the resistance heater, which can improve the heating rate.

[0027] Based on the above embodiments: As an optional embodiment, the voltage regulating device 2 includes a frequency converter or an inverter; Power supply 1 includes: First power supply unit; The power processing module connected to the first power supply unit is used to filter out electromagnetic interference in the output power of the first power supply unit and to regulate the voltage. If the first power supply unit is an AC power source, the voltage regulating device 2 is a frequency converter; If the first power supply unit is a DC power supply, the voltage regulating device 2 is an inverter.

[0028] Specifically, for a better explanation of the embodiments of the present invention, please refer to... Figure 2 , Figure 2 This is a second structural schematic diagram of the heating system for a rail vehicle provided by the present invention. Considering that the power supply system of a rail vehicle has both AC and DC types, and that unstable power supply quality can affect the heating effect, the technical solution in this embodiment of the invention is designed. On the one hand, the frequency converter can be adapted to AC power, and the inverter can be adapted to DC power. Both the frequency converter and the inverter can perform stepless output voltage regulation under the control of the controller 5, thereby enabling more precise and efficient regulation of the passenger compartment temperature. On the other hand, the power processing module performs filtering and voltage regulation on the output of the first power supply unit to ensure that the system can work stably under different power supply conditions. It is compatible with different power supply systems; the power processing module can suppress electromagnetic interference (EMI) and improve system reliability.

[0029] The power processing module may include an EMI filter circuit and a voltage regulator circuit. The voltage regulator circuit may be a switching power supply, etc., and the embodiments of the present invention are not limited thereto.

[0030] Of course, in addition to this specific form, the pressure regulating device 2 can also have many other structures, and the embodiments of the present invention are not limited here.

[0031] As an optional embodiment, the heating system of the rail vehicle also includes a low-pass filter; A low-pass filter is connected between the output terminal of the voltage regulator 2 and the resistance heater 3 to filter out high-frequency harmonic components in the output voltage of the voltage regulator 2.

[0032] Specifically, considering that the voltage regulating device 2, especially the PWM (Pulse Width Modulation) waveform output by the frequency converter or inverter, contains a large number of high-frequency harmonics, these harmonics will cause additional losses and electromagnetic noise in the resistance heater 3, affecting heating efficiency and system stability. Therefore, this embodiment of the invention provides this technical solution: by setting a low-pass filter between the output of the voltage regulating device 2 and the resistance heater 3, high-frequency harmonic components can be filtered out, making the voltage waveform input to the resistance heater 3 smoother, reducing the losses of the resistance heater 3, improving heating efficiency, reducing electromagnetic interference, improving the electromagnetic compatibility performance of the system, and extending the service life of the resistance heater 3.

[0033] The low-pass filter can be of various types, such as an LC filter circuit that includes an inductor and a capacitor, etc., and the embodiments of the present invention are not limited to these types.

[0034] As an optional embodiment, the fan 6 includes a second power supply unit, a time delay relay, and the fan 6 body; The first terminal of the time delay relay is connected to the second power supply unit, the second terminal of the time delay relay is connected to the fan 6 body, and the control terminal of the time delay relay is connected to the controller 5. Synchronizing the operation of the control fan 6 and the resistance heater 3 includes: When the control resistor heater 3 is started, the control delay relay is closed; when the control resistor heater 3 is turned off, the control delay relay is turned off.

[0035] Specifically, considering that the resistance heater 3 retains a significant amount of residual heat after power failure, if the fan 6 stops working immediately, it will lead to excessively high local temperatures, affecting the lifespan and safety of the heater. Therefore, the technical solution in this embodiment of the invention is provided. By setting a time-delay relay in the circuit of the fan 6, when the resistance heater 3 is turned off, the fan 6 body can operate for a delayed period of time to ensure that the heat is fully dissipated, avoid overheating of the equipment, reduce the surface temperature of the resistance heater 3 after it stops working, extend the service life of the equipment, improve system safety, avoid the risk of fire caused by residual heat accumulation, and improve the passenger experience by avoiding discomfort caused by sudden temperature drops.

[0036] The second power supply unit can be of various types, such as a 24V DC power supply, and this embodiment of the invention does not limit it.

[0037] As an optional embodiment, the resistance heater 3 includes multiple resistance units; Multiple resistor units are evenly distributed along the length of the passenger compartment of the rail vehicle.

[0038] Specifically, considering the long length of the passenger compartment in rail vehicles, using a single resistance heater 3 would result in uneven temperature distribution, with areas near the resistance heater 3 being excessively hot and areas far from it being insufficiently hot, affecting passenger comfort. Therefore, the technical solution in this embodiment of the invention is proposed. By designing the resistance heater 3 as multiple resistance units and distributing them evenly along the length of the passenger compartment, uniform heat release is achieved, resulting in a more uniform temperature distribution within the passenger compartment. The modular design facilitates maintenance and replacement.

[0039] The resistor unit can be of various types, such as a resistance wire, etc., and the embodiments of the present invention are not limited to these.

[0040] As an optional embodiment, the heating system of the rail vehicle also includes: The second temperature acquisition module, located at the air outlet of the resistance heater 3, is used to acquire the first temperature value of the air outlet of the resistance heater 3. The third temperature acquisition module is installed on the surface of the resistance heater 3 to acquire the second temperature value of the surface of the resistance heater 3. The controller 5 is also used to reduce the output voltage of the voltage regulating device 2 or cut off the power supply to the resistance heater 3 when the first temperature value or the second temperature value exceeds the corresponding preset safety threshold.

[0041] Specifically, considering that the resistance heater 3 may experience abnormal temperature increases during operation due to poor heat dissipation or control malfunctions, posing a safety hazard, the technical solution in this embodiment of the invention is provided. By setting temperature acquisition modules at the air outlet and surface of the resistance heater 3 respectively, dual temperature protection can be achieved. When either the first temperature value at the air outlet or the second temperature value on the surface exceeds the corresponding preset safety threshold, the controller 5 can take protective measures in a timely manner, quickly responding to temperature anomalies and preventing equipment damage and fire risks.

[0042] The preset safety thresholds corresponding to the first temperature value and the second temperature value can be flexibly set. For example, the preset safety threshold corresponding to the first temperature value can be 60°C, and the preset safety threshold corresponding to the second temperature value can be 110°C, etc. The embodiments of the present invention are not limited here.

[0043] As an optional embodiment, power supply 1 further includes: The overvoltage and overcurrent protection module connected in series at the output terminal of the first power supply unit is used to disconnect its own electrical connection when there is an overcurrent and / or overvoltage problem in the output power of the first power supply unit.

[0044] Specifically, considering that the power supply system of rail vehicles may experience abnormal situations such as voltage fluctuations and current surges, which could damage the voltage regulating device 2 and the resistance heater 3, the technical solution in this embodiment of the invention is provided. By connecting an overvoltage and overcurrent protection module in series at the output terminal of the first power supply unit, the circuit can be automatically disconnected when overvoltage or overcurrent is detected, protecting the safety of subsequent equipment, improving the overall reliability of the system, and reducing maintenance costs and downtime.

[0045] The overvoltage and overcurrent protection module can be of various types, such as a simple fuse, or it can include a voltage detection circuit, a current detection circuit, and a controllable switch. When the controller 5 detects overvoltage through the voltage detection circuit or overcurrent through the current detection circuit, it can cut off the power supply circuit through the controllable switch connected in series with the output terminal of the first power supply unit. This embodiment of the invention is not limited here.

[0046] As an optional embodiment, the heating system of the rail vehicle also includes: A temperature setting device connected to controller 5 is used to set a preset target temperature. The temperature setting device includes a host computer and a local human-computer interaction module.

[0047] Specifically, for a better explanation of the embodiments of the present invention, please refer to... Figure 3 , Figure 3 This is a schematic diagram of the connection objects of the controller 5 provided by the present invention. The controller 5 is connected to a controller power supply. Considering the complex operating environment of rail vehicles and the different temperature requirements of different passengers, a flexible temperature setting method is needed. Therefore, the technical solution in this embodiment of the invention is provided. The temperature setting device includes a host computer and a local human-computer interaction module, which can realize remote and local dual temperature setting functions, meet the needs of different usage scenarios, and achieve mutual redundancy, which is conducive to improving the ease of operation and user experience.

[0048] The host computer and the local human-computer interaction module can be of various types, such as a touch screen for the human-computer interaction module, and a computer or mobile phone for the host computer. This embodiment of the invention does not limit the types of components.

[0049] As an optional embodiment, controller 5 is also used for: Based on the preset correspondence, the rotation speed value corresponding to the difference between the passenger room temperature and the preset target temperature is determined, and the fan 6 is controlled to run according to the rotation speed value; The preset correspondence is a positive correlation between the difference between the cabin temperature and the preset target temperature and the rotation speed value.

[0050] Specifically, considering that the rate of heat transfer can be adjusted by regulating the wind speed, thereby affecting the rate of temperature regulation, this embodiment of the invention can set a positive correlation between the difference between the passenger room temperature and the preset target temperature and the rotation speed value. Based on the preset correspondence, the rotation speed value corresponding to the difference between the passenger room temperature and the preset target temperature is determined, and the fan 6 is controlled to run according to the rotation speed value. That is to say, the greater the difference between the passenger room temperature and the preset target temperature, the greater the rotation speed value of the fan 6, which can improve the temperature control accuracy and quickly respond to temperature changes.

[0051] The preset correspondence can be of various types, such as a linear positive correlation, etc., and this embodiment of the invention does not limit it.

[0052] The present invention also provides a rail vehicle, including a rail vehicle body and a heating system of the rail vehicle as described in the foregoing embodiments, which is connected to the rail vehicle body.

[0053] For an introduction to the rail vehicle provided in the embodiments of the present invention, please refer to the aforementioned embodiments of the heating system for rail vehicles. The embodiments of the present invention will not be repeated here.

[0054] The various embodiments described in this specification are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. It should also be noted that in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0055] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heating system for a rail vehicle, characterized in that, include: Power supply and fan; A voltage regulating device is used to regulate the power supply voltage and supply power to the resistance heater under the control of the controller; The first temperature acquisition module is used to collect the passenger compartment temperature of the rail vehicle; The controller is used to control the pressure regulating device based on the difference between the passenger room temperature and the preset target temperature, so that the passenger room temperature equals the preset target temperature; and to control the fan and resistance heater to work synchronously to accelerate heat transfer. Resistance heaters are used for heating by electricity.

2. The heating system for rail vehicles according to claim 1, characterized in that, The voltage regulating device includes a frequency converter or an inverter; The power source includes: First power supply unit; The power processing module connected to the first power supply unit is used to filter out electromagnetic interference in the output power of the first power supply unit and to regulate the voltage. If the first power supply unit is an AC power source, the voltage regulating device is a frequency converter; If the first power supply unit is a DC power supply, the voltage regulation device is an inverter.

3. The heating system for rail vehicles according to claim 2, characterized in that, The heating system of the rail vehicle also includes a low-pass filter; The low-pass filter is connected between the output terminal of the voltage regulator and the resistance heater to filter out high-frequency harmonic components in the output voltage of the voltage regulator.

4. The heating system for rail vehicles according to claim 1, characterized in that, The fan includes a second power supply unit, a time delay relay, and the fan body; The first terminal of the time delay relay is connected to the second power supply unit, the second terminal of the time delay relay is connected to the fan body, and the control terminal of the time delay relay is connected to the controller. The synchronous operation of the control fan and the resistance heater includes: When the control resistor heater is started, the control delay relay is closed; when the control resistor heater is turned off, the control delay relay is turned off.

5. The heating system for rail vehicles according to claim 1, characterized in that, The resistance heater includes multiple resistance units; The multiple resistor units are evenly distributed along the length of the passenger compartment of the rail vehicle.

6. The heating system for rail vehicles according to claim 1, characterized in that, The heating system of the rail vehicle also includes: The second temperature acquisition module, located at the air outlet of the resistance heater, is used to acquire the first temperature value of the air outlet of the resistance heater. A third temperature acquisition module is installed on the surface of the resistance heater to acquire a second temperature value of the surface of the resistance heater. The controller is also used to reduce the output voltage of the voltage regulator or cut off the power supply to the resistance heater when the first temperature value or the second temperature value exceeds the corresponding preset safety threshold.

7. The heating system for rail vehicles according to claim 2, characterized in that, The power supply also includes: The overvoltage and overcurrent protection module connected in series at the output terminal of the first power supply unit is used to disconnect its own electrical connection when there is an overcurrent and / or overvoltage problem in the output power of the first power supply unit.

8. The heating system for rail vehicles according to claim 1, characterized in that, The heating system of the rail vehicle also includes: A temperature setting device connected to the controller is used to set the preset target temperature. The temperature setting device includes a host computer and a local human-computer interaction module.

9. The heating system for a rail vehicle according to any one of claims 1 to 8, characterized in that, The controller is also used for: Based on a preset correspondence, the rotation speed value corresponding to the difference between the passenger room temperature and the preset target temperature is determined, and the fan is controlled to run at the preset rotation speed value. The preset correspondence is a positive correlation between the difference between the cabin temperature and the preset target temperature and the rotation speed value.

10. A rail vehicle, characterized in that, It includes the rail vehicle body, and also includes the rail vehicle heating system as described in any one of claims 1 to 9 connected to the rail vehicle body.

Images