Rail air conditioning unit, control method and rail vehicle

Abstract

The invention provides a rail air conditioning unit which comprises a main circuit connected with a power module, and a main circuit collecting module is arranged on the main circuit and used for collecting electrical parameters of the main circuit; the plurality of branches are connected with the power module, and at least one branch is provided with a branch acquisition module used for acquiring electrical parameters of the branch; and the control module is electrically connected with the main circuit acquisition module and the branch circuit acquisition module, and is used for controlling the working states of the power supply module and the power module according to the feedback information of the main circuit acquisition module and the branch circuit acquisition module. According to the rail air conditioning unit, the working states of the power module and all the power modules are obtained by obtaining the electrical parameters on the main circuit and the branch circuits, and the power module or the related power modules can be protected in time. The invention further provides a control method applied to the rail air conditioning unit. The invention further provides a rail vehicle adopting the rail air conditioning unit or the control method.

Description

Technical Field

[0001] This invention belongs to the technical field of rail vehicle air conditioning systems, specifically, it relates to a rail air conditioning unit, a control method, and a rail vehicle. Background Technology

[0002] In the existing technology, each carriage of a rail vehicle is equipped with an air conditioning unit and a control cabinet. The control cabinet is equipped with components such as circuit breakers, motor protectors, and thermal overload relays to protect the air conditioning unit from short circuits, overloads, and overcurrents.

[0003] However, the air conditioning unit and the control cabinet need to be connected by a long-distance wiring harness. This connection method results in a lot of line loss during the operation of the air conditioning unit. On the other hand, the protection of components such as circuit breakers only occurs after a fault occurs, at which point the air conditioning unit has already suffered damage caused by the corresponding fault.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] One objective of this invention is to overcome the shortcomings of the prior art and provide a track air conditioning unit that obtains the working status of the power module and each power module by acquiring electrical parameters on the main road and branch roads, with fast feedback speed and high acquisition accuracy.

[0006] The second objective of this invention is to provide a control method applicable to the above-mentioned rail air conditioning unit.

[0007] A third objective of the present invention is to provide a rail vehicle employing the above-described rail air conditioning unit or the control method thereof.

[0008] To achieve the first objective, the present invention adopts the following technical solution:

[0009] A track-mounted air conditioning unit, comprising:

[0010] The main circuit is connected to the power module, and a main circuit acquisition module is installed on the main circuit to acquire the electrical parameters of the main circuit;

[0011] A plurality of branches connected to the power module, at least one of which is equipped with a branch acquisition module for acquiring the electrical parameters of the branch;

[0012] The control module is electrically connected to both the main road acquisition module and the branch road acquisition module, and is used to control the working status of the power supply module and the power module based on the feedback information from the main road acquisition module and the branch road acquisition module.

[0013] Furthermore, each of the aforementioned branches is equipped with a circuit breaker and a contactor connected in series, and the branch acquisition module is located between the contactor and the power module.

[0014] Furthermore, the power module includes a fan, a compressor, a condenser fan, and an electric heating unit;

[0015] The branch acquisition module includes at least one of the following: a first acquisition module located in the ventilation fan branch, a second acquisition module located in the compressor branch, a third acquisition module located in the condenser fan branch, and a fourth acquisition module located in the electric heating branch.

[0016] To achieve the second objective, the present invention adopts the following technical solution:

[0017] A control method applied to the above-mentioned rail air conditioning unit includes:

[0018] Obtain the electrical parameters of the main circuit;

[0019] Determine if the power module is faulty based on the electrical parameters of the main line. If so, control the track air conditioning unit to stop; otherwise, control the power modules to start sequentially.

[0020] Obtain the electrical parameters of the branch circuit and determine whether the power module of the branch circuit is faulty based on the electrical parameters. If so, control the track air conditioning unit to stop or execute the ventilation mode; otherwise, execute the preset operation.

[0021] Furthermore, the electrical parameters of the main circuit include current parameters and voltage parameters;

[0022] When the track air conditioning unit is working, the control module obtains and records the active power, reactive power, and power factor based on the current and voltage parameters of the main line fed back by the main line acquisition module.

[0023] Furthermore, the control power module is activated sequentially, including:

[0024] The ventilation fan branch is connected, the electrical parameters of the ventilation fan branch are obtained, and the ventilation fan is judged to be faulty based on the obtained electrical parameters. If so, the track air conditioning unit is controlled to stop.

[0025] If not, the condenser fan branch is connected in cooling mode, and the electric heating branch is connected in heating mode.

[0026] Furthermore, in cooling mode, the system determines whether the condenser fan is faulty based on the electrical parameters of the condenser fan branch. If so, it executes ventilation mode.

[0027] If not, the compressor branch is connected and the compressor fault is determined based on the obtained electrical parameters of the compressor branch. If so, the ventilation mode is executed.

[0028] If not, perform the preset operation.

[0029] Furthermore, in heating mode, the system determines whether the electric heating unit is faulty based on the electrical parameters of the electric heating branch. If so, it executes ventilation mode.

[0030] If not, perform the preset operation.

[0031] Furthermore, the electrical parameters acquired by the branch acquisition module are the current values ​​of any phase;

[0032] When the actual current value I of any phase is equal to 0, it is judged as a phase loss fault;

[0033] If the actual current value I of any phase is greater than the set current, it is judged as an overcurrent fault;

[0034] The maximum value of the three-phase current I MAX or minimum value I MIN When the difference between the current and the average value of the three-phase current exceeds the set range, it is judged as a three-phase imbalance fault.

[0035] To achieve the third objective of the invention, the present invention adopts the following technical solution:

[0036] A rail vehicle employs the aforementioned rail air conditioning unit, or employs the aforementioned control method for the rail air conditioning unit.

[0037] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0038] 1. The rail air conditioning unit of the present invention obtains the working status of the power supply module and each power module by acquiring the electrical parameters on the main road and branch road. It can not only record the energy consumption data of the rail air conditioning unit, but also protect the power supply module or related power modules in a timely manner when the electrical parameters are abnormal, so as to avoid them from suffering continuous damage. The feedback speed is fast and the acquisition accuracy is high.

[0039] 2. In this invention, the power modules are started sequentially. When the ventilator is working normally, the other power modules are started. If the other power modules are faulty, the ventilation mode is executed to ensure the air quality in the passenger room. At the same time, it can also avoid the waste of energy caused by the other power modules starting directly when the ventilator is not working normally.

[0040] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0041] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0042] Figure 1 This is a schematic diagram of the track air conditioning unit of the present invention;

[0043] Figure 2 This is a flowchart illustrating the control method for the track air conditioning unit of the present invention.

[0044] Key components in the diagram: 1. Power supply module; 2. Main circuit; 3. Ventilation fan branch circuit; 31. First circuit breaker; 32. First contactor; 33. Ventilation fan; 4. Compressor branch circuit; 41. Second circuit breaker; 42. Second contactor; 43. Compressor; 5. Condenser fan branch circuit; 51. Third circuit breaker; 52. Third contactor; 53. Condenser fan; 6. Electric heating branch circuit; 61. Fourth circuit breaker; 62. Fourth contactor; 63. Electric heating unit; 7. Main circuit acquisition module; 8. First acquisition module; 9. Second acquisition module; 10. Third acquisition module; 11. Fourth acquisition module.

[0045] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0047] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] In the existing technology, a long-distance wiring harness needs to be installed between the rail air conditioning unit and the control cabinet. This connection method will generate more line loss when the air conditioning unit is working. On the other hand, since the protection of components such as circuit breakers only occurs after the fault occurs, the air conditioning unit has already been damaged by the corresponding fault.

[0050] In view of this, such as Figure 1 As shown, the present invention provides a track air conditioning unit, which includes a main circuit 2 connected to a power module 1 and several branch circuits connected to several power modules. The main circuit 2 is provided with a main circuit acquisition module 7, and at least one branch circuit is provided with a branch circuit acquisition module.

[0051] The main road acquisition module 7 is located at the connection point between the main road 2 and any branch road, and between the power supply module 1. It is used to collect the electrical parameters of the main road 2 of the track air conditioning unit to determine whether the power supply module 1 is faulty. The main road acquisition module 7 is electrically connected to the control module and is used to feed back the collected electrical parameters. The control module controls the working status of the power supply module 1 according to the feedback information of the main road acquisition module 7.

[0052] Furthermore, the electrical parameters collected by the main road acquisition module 7 in this invention include current parameters and voltage parameters. Based on the feedback from the main road acquisition module 7, the control module can determine whether the power supply module 1 has faults such as undervoltage, phase loss, or three-phase imbalance. If such faults exist, the track air conditioning unit can be shut down in time to ensure its service life.

[0053] On the other hand, parameters such as active power, reactive power, and power factor of the rail air conditioning unit can also be obtained through current and voltage parameters, thereby recording its energy consumption data.

[0054] Accordingly, in order to reduce line loss, the main acquisition module 7 in this invention communicates with the control module via RS485, CAN, or Ethernet communication bus.

[0055] In this invention, a circuit breaker and a contactor are connected in series on each branch. The branch acquisition module is located between the contactor and the power module to acquire the electrical parameters of the branch and feed them back to the control module electrically connected to it. The control module controls the working state of the power module according to the feedback information from the branch acquisition module.

[0056] Specifically, the power module of the rail air conditioning unit in this invention includes a fan 33, a compressor 43, a condenser fan 53, and an electric heating unit 63.

[0057] Accordingly, the branch acquisition module includes at least one of the following: a first acquisition module 8 located in the ventilation fan branch 3, a second acquisition module 9 located in the compressor branch 4, a third acquisition module 10 located in the condenser fan branch 5, and a fourth acquisition module 11 located in the electric heating branch 6.

[0058] In one embodiment of the present invention, the ventilation fan branch 3 includes a first circuit breaker 31 and a first contactor 32 connected in series. The first circuit breaker 31 is used to disconnect the branch when a short circuit or overload occurs in the ventilation fan branch 3, and the first contactor 32 is used to control the on / off of the ventilation fan branch 3 according to the actual situation, thereby controlling the opening or closing of the ventilation fan 33.

[0059] The first acquisition module 8 is located between the first contactor 32 and the fan 33 to acquire the electrical parameters of the fan 33. When the electrical parameter is current, the first acquisition module 8 can be set as the first current sensor. At this time, the control module can determine whether the fan 33 has faults such as overcurrent, phase loss, or three-phase imbalance based on the current signal fed back by the first acquisition module 8.

[0060] The first acquisition module 8 and the first circuit breaker 31 can provide dual protection for the ventilation fan branch 3. Since the first circuit breaker 31 will only cut off the ventilation fan branch 3 when the current in the ventilation fan branch 3 exceeds its first breaking current, in this embodiment, the first set current of the ventilation fan branch 3 is less than the first breaking current of the first circuit breaker 31. Therefore, through the feedback of the first acquisition module 8, the control module can protect the ventilation fan 33 more quickly. For example, when the current in the ventilation fan branch 3 is greater than the first set current but less than the first breaking current, the control module can control the first contactor 32 to turn off the ventilation fan branch 3. Compared with the large current when the first circuit breaker 31 is working, the ventilation fan 33 is less damaged in this embodiment.

[0061] On the other hand, when the control module does not disconnect the ventilation fan branch 3, but the first circuit breaker 31 is working, the staff can also determine that the first acquisition module 8 is faulty and then carry out timely maintenance.

[0062] In another embodiment of the present invention, the compressor branch 4 includes a second circuit breaker 41 and a second contactor 42 connected in series. The second circuit breaker 41 is used to disconnect the branch when a short circuit or overload occurs in the compressor branch 4 to protect the compressor 43. The second contactor 42 is used to control the opening or closing of the compressor branch 4 according to the actual situation, thereby controlling the working state of the compressor 43.

[0063] The second acquisition module 9 is located between the second contactor 42 and the compressor 43 to acquire the electrical parameters of the compressor 43. When the electrical parameter is current, the second acquisition module 9 is set as the second current sensor. At this time, the control module can determine whether the compressor 43 has faults such as overcurrent, phase loss or three-phase imbalance based on the current signal fed back by the second acquisition module 9.

[0064] The second acquisition module 9 and the second circuit breaker 41 can provide dual protection for the compressor branch 4. Since the second circuit breaker 41 will only disconnect the compressor branch 4 when the current in the compressor branch 4 exceeds its second disconnect current, in this embodiment, the second set current of the compressor branch 4 is less than the second disconnect current of the second circuit breaker 41. Therefore, through the feedback of the second acquisition module 9, the control module can protect the compressor 43 more quickly. For example, when the current in the compressor branch 4 is greater than the second set current but less than the second disconnect current, the control module can control the second contactor 42 to shut off the compressor branch 4 before the second circuit breaker 41 has been activated. Compared with the large current when the second circuit breaker 41 is activated, the compressor 43 is less damaged in this embodiment.

[0065] On the other hand, when the control module does not disconnect the compressor branch 4, but the second circuit breaker 41 is working, the staff can also determine that the second acquisition module 9 is faulty, and then carry out timely maintenance.

[0066] In another embodiment of the present invention, the condenser fan branch 5 includes a third circuit breaker 51 and a third contactor 52 connected in series. The third circuit breaker 51 is used to disconnect the branch when a short circuit or overload occurs in the condenser fan branch 5 to protect the condenser fan 53. The third contactor 52 is used to control the opening or closing of the condenser fan branch 5 according to the actual situation, thereby controlling the working state of the condenser fan 53.

[0067] The third acquisition module 10 is located between the third contactor 52 and the condenser fan 53 to acquire the electrical parameters of the condenser fan 53. When the electrical parameter is current, the third acquisition module 10 is set as the third current sensor. At this time, the control module can determine whether the condenser fan 53 has faults such as overcurrent, phase loss or three-phase imbalance based on the current signal fed back by the third acquisition module 10.

[0068] The third acquisition module 10 and the third circuit breaker 51 can provide dual protection for the condenser fan branch 5. Since the third circuit breaker 51 will only cut off the condenser fan branch 5 when the current in the condenser fan branch 5 exceeds its third breaking current, in this embodiment, the third set current in the condenser fan branch 5 is less than the third breaking current of the third circuit breaker 51. Therefore, through the feedback of the third acquisition module 10, the control module can protect the condenser fan 53 more quickly. For example, when the current in the condenser fan branch 5 is greater than the third set current but less than the third breaking current, the control module can control the third contactor 52 to shut off the condenser fan branch 5 before the third circuit breaker 51 has worked. Compared with the large current when the third circuit breaker 51 is working, the condenser fan 53 suffers less damage in this embodiment.

[0069] On the other hand, when the control module does not disconnect the condenser fan branch 5, but the third circuit breaker 51 is working, the staff can also determine that the third acquisition module 10 is faulty and then carry out timely maintenance.

[0070] In another embodiment of the present invention, the electric heating branch 6 includes a fourth circuit breaker 61 and a fourth contactor 62 connected in series. The fourth circuit breaker 61 is used to disconnect the branch when a short circuit or overload occurs in the electric heating branch 6 to protect the electric heating unit 63. The fourth contactor 62 is used to control the opening or closing of the electric heating branch 6 according to the actual situation, thereby controlling the working state of the electric heating unit 63.

[0071] The fourth acquisition module 11 is located between the fourth contactor 62 and the electric heating unit 63 to acquire the electrical parameters of the electric heating unit 63. When the electrical parameter is current, the fourth acquisition module 11 is set as the fourth current sensor. At this time, the control module can determine whether the electric heating unit 63 has faults such as overcurrent, phase loss or three-phase imbalance based on the current signal fed back by the fourth acquisition module 11.

[0072] The fourth acquisition module 11 and the fourth circuit breaker 61 can provide dual protection for the electric heating branch 6. Since the fourth circuit breaker 61 will only cut off the electric heating branch 6 when the current in the electric heating branch 6 exceeds its set current, in this embodiment, the fourth set current of the electric heating branch 6 is less than the fourth breaking current of the fourth circuit breaker 61. Therefore, through the feedback of the fourth acquisition module 11, the control module can protect the electric heating unit 63 more quickly. For example, when the current in the electric heating branch 6 is greater than the fourth set current but less than the fourth breaking current, the control module can control the fourth contactor 62 to turn off the electric heating branch 6 before the fourth circuit breaker 61 has been activated. Compared with the large current when the fourth circuit breaker 61 is activated, the electric heating unit 63 is less damaged in this embodiment.

[0073] On the other hand, when the control module does not disconnect the electric heating branch 6, but the fourth circuit breaker 61 is working, the staff can also determine that the fourth acquisition module 11 is faulty and then carry out timely maintenance.

[0074] Furthermore, in this invention, the branch acquisition module communicates with the control module via RS485, CAN, or Ethernet communication bus to reduce line loss.

[0075] In a preferred embodiment of the present invention, a first acquisition module 8, a second acquisition module 9, a third acquisition module 10 and a fourth acquisition module 11 are respectively provided on the ventilation fan branch 3, the compressor branch 4, the condenser fan branch 5 and the electric heating branch 6 of the track air conditioning unit.

[0076] Because the feedback speed of the branch acquisition module is faster, this embodiment can reduce the damage to the power module. On the other hand, when the circuit breaker is working, but the feedback value of the branch acquisition module is normal, the staff can also promptly determine that there is a fault in the branch acquisition module and then carry out timely repairs.

[0077] Furthermore, considering that both the branch acquisition module and the main acquisition module 7 may malfunction, in this embodiment, the branch acquisition module and the main acquisition module 7 can also verify each other whether there is a malfunction.

[0078] Specifically, when the feedback information from the branch acquisition module and the main acquisition module 7 contradicts each other—for example, when the feedback information from any branch acquisition module is abnormal, but the feedback information from the main acquisition module 7 is normal, or when the feedback information from the main acquisition module 7 is abnormal, but the feedback information from the branch acquisition modules is normal—the staff can determine that either the main acquisition module 7 or the branch acquisition module is faulty, and then perform relevant repairs to prevent it from failing to protect the power module.

[0079] like Figure 2 As shown, the present invention also provides a control method applied to the above-mentioned rail air conditioning unit, comprising:

[0080] Obtain the electrical parameters of main route 2;

[0081] Based on the electrical parameters of the main road 2, determine whether the power module 1 is faulty. If so, in order to ensure the service life of the track air conditioning unit, control the track air conditioning unit to stop. If not, that is, when the power module 1 is working normally, control the power modules to start in sequence.

[0082] During the sequential startup of the power modules, the electrical parameters of the branch circuit are acquired, and the power modules of the branch circuit are judged to be faulty based on the electrical parameters. If so, the track air conditioning unit is controlled to stop or the ventilation mode is executed; otherwise, the preset operation is executed.

[0083] In this invention, the power module includes a fan 33, a compressor 43, a condenser fan 53, and an electric heating unit 63. If the fan 33 is faulty, even if the other power modules can operate normally, the track air conditioning unit cannot operate normally. Therefore, in this invention, it is preferred to connect the fan branch 3 and determine whether the fan 33 is faulty.

[0084] When the ventilator 33 is working normally, in the cooling mode, if the condenser fan 53 malfunctions, even if the compressor 43 is working normally, the condenser heat dissipation will be limited, and the cooling mode of the rail air conditioning unit will not be able to operate normally. Therefore, the condenser fan 53 must be started before the compressor 43 to avoid wasting energy when the compressor 43 is started directly.

[0085] On the other hand, even if the condenser fan 53 and compressor 43 malfunction, the ventilation fan 33 still needs to work normally to ensure the air quality in the passenger compartment. At this time, the track air conditioning unit is in ventilation mode.

[0086] Specifically, in this invention, the control power module is activated sequentially including:

[0087] The ventilation fan branch 3 is connected, the electrical parameters of the ventilation fan branch 3 are obtained, and the ventilation fan 33 is judged to be faulty based on the obtained electrical parameters. If so, the track air conditioning unit is controlled to stop.

[0088] If not, that is, when the ventilator 33 can work normally, in the cooling mode, connect the condenser fan branch 5 to start the condenser fan 53, and in the heating mode, connect the electric heating branch 6 to start the electric heating unit 63.

[0089] In cooling mode, the condenser fan 53 is checked for faults based on the electrical parameters of the condenser fan branch 5. If so, the compressor branch 4 is kept off and ventilation mode is executed to ensure the air quality in the passenger room.

[0090] If not, that is, when both the ventilator 33 and the condenser fan 53 are working normally, the compressor branch 4 is connected and the compressor 43 is judged to be faulty based on the obtained electrical parameters of the compressor branch 4. If so, the condenser fan 53 is also shut down because the compressor 43 cannot work normally. At this time, only the ventilator 33 works to ensure the air quality in the passenger room.

[0091] If not, meaning that the ventilator 33, condenser fan 53 and compressor 43 are all working normally, the track air conditioning unit can operate normally in cooling mode.

[0092] In heating mode, the electric heating unit 63 is checked for faults based on the electrical parameters of the electric heating branch 6. If so, the ventilation fan 33 remains in operation and the ventilation mode is executed to ensure the air quality in the passenger room.

[0093] If not, execute the preset operation and adjust the operating power of the power module according to the actual situation to ensure the comfort of the passenger compartment.

[0094] Furthermore, when the main acquisition module 7 and the branch acquisition module are working normally in cooling or heating mode, they still feed back electrical parameters to the control module in real time. The control module performs relevant operations in the event of a failure of any power module according to the above steps, thereby ensuring the speed of fault response, reducing the damage to the power module, and thus extending its service life.

[0095] In this invention, the electrical parameters of the main circuit 2 include current parameters and voltage parameters. When the track air conditioning unit is working, the control module can not only determine whether the power supply module 1 is faulty based on the current parameters and voltage parameters of the main circuit 2 fed back by the main circuit acquisition module 7, but also obtain and record the active power, reactive power and power factor, thereby assisting the staff in further optimizing the control method of the track air conditioning unit.

[0096] The electrical parameters collected by the branch acquisition module are the current values ​​of any phase. In one embodiment of the present invention, the judgment logic of the control module is as follows:

[0097] When the actual current value I of any phase is equal to 0, it is judged as a phase loss fault;

[0098] An overcurrent fault is identified when the actual current value I of any phase exceeds the set current. For example, the set current can be set to the rated current I. N 1.2 times, that is, when I > (1 + 20%)I N When this happens, the control module can determine that an overcurrent fault has occurred;

[0099] The maximum value of the three-phase current I MAX or minimum value I MIN When the difference between the current and the average value of the three-phase current exceeds a set range, it is judged as a three-phase imbalance fault. For example, when I MAX When >(1+15%))(I1+I2+I3) / 3, or I MIN When the value is less than (1-15%)(I1+I2+I3) / 3, the control module can determine that a three-phase imbalance fault has occurred. At this time, the above-mentioned setting range is 15% of the average value of the three-phase current.

[0100] The present invention also provides a rail vehicle, wherein at least one car of the rail vehicle is equipped with the above-mentioned rail air conditioning unit, or the rail air conditioning unit in at least one car adopts the above-mentioned control method for the rail air conditioning unit.

[0101] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A track-mounted air conditioning unit, characterized in that, include: The main circuit is connected to the power module, and a main circuit acquisition module is installed on the main circuit to acquire the electrical parameters of the main circuit; A plurality of branches connected to the power module, at least one of which is equipped with a branch acquisition module for acquiring the electrical parameters of the branch; The control module is electrically connected to both the main road acquisition module and the branch road acquisition module, and is used to control the working status of the power supply module and the power module based on the feedback information from the main road acquisition module and the branch road acquisition module.

2. The rail air conditioning unit according to claim 1, characterized in that, Each of the aforementioned branches is equipped with a circuit breaker and a contactor connected in series, and the branch acquisition module is located between the contactor and the power module.

3. A track air conditioning unit according to claim 1 or 2, characterized in that, The power module includes a fan, a compressor, a condenser fan, and an electric heating unit; The branch acquisition module includes at least one of the following: a first acquisition module located in the ventilation fan branch, a second acquisition module located in the compressor branch, a third acquisition module located in the condenser fan branch, and a fourth acquisition module located in the electric heating branch.

4. A control method applied to the rail air conditioning unit according to any one of claims 1-3, characterized in that, include: Obtain the electrical parameters of the main circuit; Determine if the power module is faulty based on the electrical parameters of the main line. If so, control the track air conditioning unit to stop; otherwise, control the power modules to start sequentially. Obtain the electrical parameters of the branch circuit and determine whether the power module of the branch circuit is faulty based on the electrical parameters. If so, control the track air conditioning unit to stop or execute the ventilation mode; otherwise, execute the preset operation.

5. The control method according to claim 4, characterized in that, The electrical parameters of the main circuit include current parameters and voltage parameters; When the track air conditioning unit is working, the control module obtains and records the active power, reactive power, and power factor based on the current and voltage parameters of the main line fed back by the main line acquisition module.

6. The control method according to claim 4, characterized in that, The power control module is started sequentially, including: The ventilation fan branch is connected, the electrical parameters of the ventilation fan branch are obtained, and the ventilation fan is judged to be faulty based on the obtained electrical parameters. If so, the track air conditioning unit is controlled to stop. If not, the condenser fan branch is connected in cooling mode, and the electric heating branch is connected in heating mode.

7. The control method according to claim 6, characterized in that, In cooling mode, the system determines whether the condenser fan is faulty based on the electrical parameters of the condenser fan branch. If so, it executes ventilation mode. If not, the compressor branch is connected and the compressor fault is determined based on the obtained electrical parameters of the compressor branch. If so, the ventilation mode is executed. If not, perform the preset operation.

8. The control method according to claim 6, characterized in that, In heating mode, the system determines whether the electric heating unit is faulty based on the electrical parameters of the electric heating branch. If so, it executes ventilation mode. If not, perform the preset operation.

9. The control method according to any one of claims 6-8, characterized in that, The electrical parameters collected by the branch acquisition module are the current values ​​of any phase; When the actual current value I of any phase is equal to 0, it is judged as a phase loss fault; If the actual current value I of any phase is greater than the set current, it is judged as an overcurrent fault; The maximum value of the three-phase current I MAX or minimum value I MIN The difference between the current and the average value of the three-phase current exceeds the set value. When the range is within the specified range, it is judged to be a three-phase imbalance fault.

10. A rail vehicle, characterized in that, The track air conditioning unit according to any one of claims 1-3, or the control method of the track air conditioning unit according to any one of claims 4-9, may be used.

Images