A rail air conditioning unit monitoring system and rail vehicle

Abstract

The utility model provides a rail air-conditioning unit monitoring system, the rail air-conditioning unit includes a main circuit connected to a power module and several branches connected to several power modules, including a main circuit acquisition module, a branch circuit acquisition module and a control module, the main circuit acquisition module and the control module, the branch circuit acquisition module and the control module are all electrically connected; the main circuit acquisition module is arranged between the connection point between the main circuit and any branch circuit and the power module, and is used to collect the electrical parameters of the main circuit of the rail air-conditioning unit; the branch circuit acquisition module is at least arranged on any branch circuit, and is used to collect the electrical parameters of the branch circuit. The utility model obtains the working status of the power module and each power module by collecting the electrical parameters on the main circuit and branches of the rail air-conditioning unit, and can protect the power module or related power modules in time when the electrical parameters are abnormal. The utility model also provides a rail vehicle using the above-mentioned rail air-conditioning unit monitoring system.

Description

Technical Field

[0001] The utility model belongs to the technical field of rail vehicle air conditioning systems, and in particular relates to a rail air conditioning unit monitoring system and a rail vehicle. Background Art

[0002] In the prior art, each carriage of a rail vehicle is equipped with an air conditioning unit and a control cabinet, and the control cabinet is provided with components such as a circuit breaker, a motor protector, and a thermal overload relay to realize short circuit, overload and overcurrent protection of the air conditioning unit.

[0003] However, the air-conditioning unit and the control cabinet need to be connected through a long-distance wiring harness. This connection method will result in more line losses during the operation of the air-conditioning unit. On the other hand, the protection of components such as circuit breakers occurs only after a fault occurs, at which time the air-conditioning unit has already been damaged by the corresponding fault.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] One purpose of the utility model is to overcome the deficiencies of the prior art and provide a rail air-conditioning unit monitoring system, which obtains the working status of the power module and each power module by collecting electrical parameters on the main circuit and branch circuit of the rail air-conditioning unit, with fast feedback speed and high collection accuracy.

[0006] Another object of the utility model is to provide a rail vehicle adopting the rail air conditioning unit monitoring system.

[0007] In order to achieve the first purpose, the utility model adopts the following technical solutions:

[0008] A rail air conditioning unit monitoring system, the rail air conditioning unit comprises a main circuit connected to a power module and several branches connected to several power modules, including a main circuit acquisition module, a branch circuit acquisition module and a control module, the main circuit acquisition module and the control module, the branch circuit acquisition module and the control module are all electrically connected;

[0009] The main circuit acquisition module is arranged between the connection point between the main circuit and any branch circuit and the power supply module, and is used to collect the electrical parameters of the main circuit of the rail air conditioning unit;

[0010] The branch circuit acquisition module is at least arranged on any branch circuit, and is used for acquiring the electrical parameters of the branch circuit.

[0011] Further, the power module of the rail air conditioning unit includes a ventilator, a compressor, a condensing fan and an electric heating unit;

[0012] The branch acquisition module includes at least one of a first acquisition module arranged on the ventilator branch, a second acquisition module arranged on the compressor branch, a third acquisition module arranged on the condensing fan branch, and a fourth acquisition module arranged on the electric heating branch.

[0013] Furthermore, the fan branch includes a first circuit breaker and a first contactor which are arranged in series, and the first acquisition module is arranged between the first contactor and the fan.

[0014] Furthermore, the compressor branch includes a second circuit breaker and a second contactor arranged in series, and the second acquisition module is arranged between the second contactor and the compressor.

[0015] Furthermore, the condensing fan branch includes a third circuit breaker and a third contactor which are arranged in series, and the third acquisition module is arranged between the third contactor and the condensing fan.

[0016] Furthermore, the electric heating branch includes a fourth circuit breaker and a fourth contactor which are arranged in series, and the fourth acquisition module is arranged between the fourth contactor and the electric heating unit.

[0017] Furthermore, the electrical parameters collected by the main path collection module include current and voltage;

[0018] The electrical parameters collected by the branch acquisition module include current, and the branch acquisition module is configured as a current sensor.

[0019] Furthermore, the main circuit acquisition module is used to collect the current value of any phase of the main circuit;

[0020] And / or the branch collection module is used to collect the current value of any phase of the branch.

[0021] Furthermore, the main channel acquisition module and / or the branch channel acquisition module communicate with the control module via a communication bus.

[0022] In order to achieve the second purpose, the utility model adopts the following technical solutions:

[0023] A rail vehicle has at least one carriage provided with a rail air conditioning unit, and the rail air conditioning unit adopts the above-mentioned rail air conditioning unit monitoring system.

[0024] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0025] 1. The utility model acquires the working status of the power module and each power module by collecting the electrical parameters on the main circuit and branch circuit of the rail air-conditioning unit, so as to record the energy consumption data of the rail air-conditioning unit, and protect the power module or related power modules in time when the electrical parameters are abnormal, so as to avoid continuous damage to the power module or related power modules, with fast feedback speed and high collection accuracy.

[0026] 2. In addition to the branch collection module, the utility model also provides a circuit breaker on the relevant branch for double protection. Since the set current of the branch collection module is small, its feedback speed is faster than that of the circuit breaker, thereby reducing the damage suffered by the power module. On the other hand, when the circuit breaker works but the feedback information of the branch collection module is normal, the staff can also promptly determine that there is a fault in the branch collection module and repair it in time.

[0027] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work. In the accompanying drawings:

[0029] Figure 1 It is a schematic diagram of the monitoring system of the rail air conditioning unit of the utility model.

[0030] Description of the main components in the figure: 1. Power module; 2. Main circuit; 3. Fan branch; 31. First circuit breaker; 32. First contactor; 33. Fan; 4. Compressor branch; 41. Second circuit breaker; 42. Second contactor; 43. Compressor; 5. Condensing fan branch; 51. Third circuit breaker; 52. Third contactor; 53. Condensing fan; 6. Electric heating branch; 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.

[0031] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the prior art, a long-distance wiring harness connection is required between the rail air-conditioning unit and the control cabinet. This connection method will generate more line losses when the air-conditioning unit is working. On the other hand, since the protection of components such as circuit breakers occurs only after a fault occurs, the air-conditioning unit has already been damaged by the corresponding fault.

[0036] In view of this, if Figure 1 As shown, the utility model provides a rail air-conditioning unit monitoring system, the rail air-conditioning unit includes a main circuit 2 connected to a power module 1 and several branches connected to several power modules. Accordingly, the rail air-conditioning unit monitoring system of the utility model includes a main circuit acquisition module 7, a branch circuit acquisition module and a control module.

[0037] The main line acquisition module 7 is arranged between the connection point between the main line 2 and any branch line and the power supply module 1, and is used to collect the electrical parameters of the main line 2 of the rail air-conditioning unit. The main line acquisition module 7 is electrically connected to the control module for feeding back the collected electrical parameters.

[0038] Furthermore, the electrical parameters collected by the main acquisition module 7 in the utility model include current and voltage. The control can determine whether the power module 1 has faults such as undervoltage, phase loss, three-phase imbalance, etc. according to the feedback of the main acquisition module 7. If so, the rail air conditioning unit can be shut down in time to ensure its service life;

[0039] On the other hand, the active power, reactive power, power factor and other parameters of the rail air-conditioning unit can also be obtained through current and voltage signals, and then its energy consumption data can be recorded.

[0040] Accordingly, in order to reduce line loss, the main acquisition module 7 in the present invention communicates with the control module via a communication bus. Specifically, the main acquisition module 7 in the present invention can communicate with the control module via RS485, or CAN, or Ethernet communication bus.

[0041] The branch collection module is at least arranged on any branch to collect the electrical parameters of the branch.

[0042] The power module of the track air conditioning unit of the utility model comprises a ventilator 33 , a compressor 43 , a condensing fan 53 and an electric heating unit 63 .

[0043] Correspondingly, the branch collection module includes at least one of a first collection module 8 arranged on the fan branch 3, a second collection module 9 arranged on the compressor branch 4, a third collection module 10 arranged on the condensing fan branch 5, and a fourth collection module 11 arranged on the electric heating branch 6.

[0044] In one embodiment of the utility model, the fan branch 3 includes a first circuit breaker 31 and a first contactor 32 arranged in series, wherein the first circuit breaker 31 is used to cut off the branch when a short circuit or overload occurs in the fan branch 3, and the first contactor 32 is used to control the on and off of the fan branch 3 according to actual conditions, thereby controlling the opening or closing of the fan 33.

[0045] The first acquisition module 8 is arranged between the first contactor 32 and the ventilator 33, and is used to obtain the electrical parameters of the ventilator 33. When the electrical parameter is current, the first acquisition module 8 can be set as a first current sensor. At this time, the control module can judge whether the ventilator 33 has faults such as overcurrent, phase loss, and three-phase imbalance according to the current signal fed back by the first acquisition module 8. The first acquisition module 8 and the first circuit breaker 31 can form a double protection for the ventilator branch 3. Since the first circuit breaker 31 will only cut off the ventilator branch 3 when the current in the ventilator branch 3 exceeds its first circuit breaker current, the first set current of the ventilator branch 3 in this embodiment is less than the first circuit breaker current of the first circuit breaker 31. Therefore, through the feedback of the first acquisition module 8, the control module can protect the ventilator 33 more quickly. For example, when the current in the ventilator branch 3 is greater than the first set current but less than the first circuit breaker current, the control module can control the first contactor 32 to shut down the ventilator branch 3. Compared with the large current when the first circuit breaker 31 is working, the damage to the ventilator 33 in this embodiment is smaller.

[0046] On the other hand, when the control module does not cut off the fan branch 3, but the first circuit breaker 31 is working, the staff can also determine that there is a fault in the first acquisition module 8, and then perform timely maintenance on it.

[0047] In another embodiment of the utility model, the compressor branch 4 includes a second circuit breaker 41 and a second contactor 42 arranged in series, wherein the second circuit breaker 41 is used to cut off the branch when a short circuit or overload occurs in the compressor branch 4 to protect the compressor 43, and the second contactor 42 is used to control the opening or closing of the compressor branch 4 according to actual conditions, thereby controlling the working state of the compressor 43.

[0048] The second acquisition module 9 is arranged between the second contactor 42 and the compressor 43, and is used to obtain the electrical parameters of the compressor 43. When the electrical parameter is current, the second acquisition module 9 is correspondingly set as a 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.

[0049] The second acquisition module 9 and the second circuit breaker 41 can form double protection for the compressor branch 4. Since the second circuit breaker 41 will cut off the compressor branch 4 only when the current in the compressor branch 4 exceeds its second circuit breaker current, the second set current of the compressor branch 4 in this embodiment is less than the second circuit breaker 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 circuit breaker current, the second circuit breaker 41 has not yet worked, and the control module can control the second contactor 42 to shut down the compressor branch 4. Compared with the large current when the second circuit breaker 41 is working, the compressor 43 in this embodiment is less damaged.

[0050] On the other hand, when the control module does not cut off the compressor branch 4, but the second circuit breaker 41 is working, the staff can also determine that there is a fault in the second acquisition module 9, and then perform timely maintenance on it.

[0051] In another embodiment of the utility model, the condensing fan branch 5 includes a third circuit breaker 51 and a third contactor 52 arranged in series, wherein the third circuit breaker 51 is used to cut off the branch when a short circuit or overload occurs in the condensing fan branch 5 to protect the condensing fan 53, and the third contactor 52 is used to control the opening or closing of the condensing fan branch 5 according to actual conditions, thereby controlling the working state of the condensing fan 53.

[0052] The third acquisition module 10 is arranged between the third contactor 52 and the condensing fan 53, and is used for obtaining the electrical parameters of the condensing fan 53. When the electrical parameter is current, the third acquisition module 10 is correspondingly set as a third current sensor. At this time, the control module can determine whether the condensing fan 53 has faults such as overcurrent, phase loss or three-phase imbalance according to the current signal fed back by the third acquisition module 10.

[0053] The third acquisition module 10 and the third circuit breaker 51 can form double protection for the condensing fan branch 5. Since the third circuit breaker 51 will cut off the condensing fan branch 5 only when the current in the condensing fan branch 5 exceeds its third circuit breaker current, in this embodiment, the third set current in the condensing fan branch 5 is less than the third circuit breaker current of the third circuit breaker 51. Therefore, through the feedback of the third acquisition module 10, the control module can protect the condensing fan 53 more quickly. For example, when the current in the condensing fan branch 5 is greater than the third set current but less than the third circuit breaker current, the third circuit breaker 51 has not yet worked, and the control module can control the third contactor 52 to shut down the condensing fan branch 5. Compared with the large current when the third circuit breaker 51 is working, the condensing fan 53 in this embodiment is less damaged.

[0054] On the other hand, when the control module does not cut off the condensing fan branch 5, but the third circuit breaker 51 is working, the staff can also determine that there is a fault in the third acquisition module 10 and then perform timely maintenance on it.

[0055] In another embodiment of the utility model, the electric heating branch 6 includes a fourth circuit breaker 61 and a fourth contactor 62 arranged in series, wherein the fourth circuit breaker 61 is used to cut off the branch when a short circuit or overload occurs in the electric heating branch 6 to protect the electric heating unit 63, and the fourth contactor 62 is used to control the opening or closing of the electric heating branch 6 according to actual conditions, thereby controlling the working state of the electric heating unit 63.

[0056] The fourth acquisition module 11 is arranged between the fourth contactor 62 and the electric heating unit 63, and is used to obtain the electrical parameters of the electric heating unit 63. When the electrical parameter is current, the fourth acquisition module 11 is correspondingly set as a fourth current sensor. At this time, the control module can judge 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.

[0057] The fourth acquisition module 11 and the fourth circuit breaker 61 can form double 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 circuit breaker 61. The fourth circuit breaker current, therefore, can protect the electric heating unit 63 more quickly through the feedback of the fourth acquisition module 11. For example, when the current in the electric heating branch 6 is greater than the fourth set current but less than the fourth circuit breaker current, the fourth circuit breaker 61 has not yet worked, and the control module can control the fourth contactor 62 to shut down the electric heating branch 6. Compared with the large current when the fourth circuit breaker 61 is working, the electric heating unit 63 in this embodiment is less damaged.

[0058] On the other hand, when the control module does not cut off the electric heating branch 6, but the fourth circuit breaker 61 is working, the staff can also determine that there is a fault in the fourth acquisition module 11, and then perform timely maintenance on it.

[0059] Furthermore, in the present invention, the main circuit acquisition module 7 can collect the current value of any phase on the main circuit 2, and / or the branch circuit acquisition module can collect the current value of any phase on the relevant branch circuit.

[0060] Specifically, when the current value I of any phase is 0, the control module determines that a phase failure occurs, and controls the rail air conditioning unit to shut down or shut down the relevant branch to protect the power module;

[0061] When the current value I of any phase is greater than the set current, the control module determines that an overcurrent fault occurs, and controls the rail air conditioning unit to shut down or shut down the relevant branch. For example, the set current can be set to 1.2 times the rated current IN, that is, when I>(1+20%)IN, the control module can determine that an overcurrent fault occurs;

[0062] When IMAX>(1+15%)(I1+I2+I3) / 3, or IMIN<(1-15%)(I1+I2+I3) / 3, the control module determines that a three-phase unbalanced fault has occurred, and controls the rail air-conditioning unit to shut down or shut down the relevant branches, where IMAX is the maximum value of the three-phase current value, IMIN is the minimum value of the three-phase current value, and I1, I2, and I3 are the three-phase current values ​​respectively.

[0063] Furthermore, the branch acquisition module in the utility model communicates with the control module via a communication bus to reduce line loss. Specifically, the branch acquisition module in the utility model can communicate with the control module via RS485, CAN, or Ethernet communication bus.

[0064] In a preferred embodiment of the present utility model, 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 fan branch 3, the compressor branch 4, the condensing fan branch 5 and the electric heating branch 6 of the rail air-conditioning unit.

[0065] Since 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 perform maintenance on it in time.

[0066] Furthermore, considering that both the branch acquisition module and the main acquisition module 7 may fail, in this embodiment, the branch acquisition module and the main acquisition module 7 can verify each other whether they fail.

[0067] Specifically, when the feedback information of the branch acquisition module is inconsistent with that of the main acquisition module 7, for example, when the feedback information of any branch acquisition module is abnormal, but the feedback information of the main acquisition module 7 is normal, or when the feedback information of the main acquisition module 7 is abnormal, but the feedback information of the branch acquisition module is normal, the staff can determine that there is a fault in the main acquisition module 7 or the branch acquisition module, and then perform relevant maintenance on it to avoid its failure to protect the power module.

[0068] The utility model also provides a rail vehicle, wherein at least one carriage of the rail vehicle is provided with a rail air conditioning unit, and the rail air conditioning unit adopts the above-mentioned rail air conditioning unit monitoring system to protect its ventilator 33, compressor 43, condensing fan 53 and electric heating unit 63.

[0069] The above is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.

Claims

1. A monitoring system for a rail air conditioning unit, the rail air conditioning unit comprising a main circuit connected to a power module and a plurality of branches connected to a plurality of power modules, characterized in that: It includes a main channel acquisition module, a branch channel acquisition module and a control module, wherein the main channel acquisition module and the control module, and the branch channel acquisition module and the control module are all electrically connected; The main circuit acquisition module is arranged between the connection point between the main circuit and any branch circuit and the power supply module, and is used to collect the electrical parameters of the main circuit of the rail air conditioning unit; The branch circuit acquisition module is at least arranged on any branch circuit, and is used for acquiring the electrical parameters of the branch circuit.

2. A rail air conditioning unit monitoring system according to claim 1, characterized in that: The power module of the rail air conditioning unit includes a ventilator, a compressor, a condensing fan and an electric heating unit; The branch acquisition module includes at least one of a first acquisition module arranged on the ventilator branch, a second acquisition module arranged on the compressor branch, a third acquisition module arranged on the condensing fan branch, and a fourth acquisition module arranged on the electric heating branch.

3. A rail air conditioning unit monitoring system according to claim 2, characterized in that: The fan branch includes a first circuit breaker and a first contactor which are arranged in series, and the first acquisition module is arranged between the first contactor and the fan.

4. A rail air conditioning unit monitoring system according to claim 2, characterized in that: The compressor branch includes a second circuit breaker and a second contactor arranged in series, and the second acquisition module is arranged between the second contactor and the compressor.

5. A rail air conditioning unit monitoring system according to claim 2, characterized in that: The condensing fan branch includes a third circuit breaker and a third contactor which are arranged in series, and the third acquisition module is arranged between the third contactor and the condensing fan.

6. A rail air conditioning unit monitoring system according to claim 2, characterized in that: The electric heating branch comprises a fourth circuit breaker and a fourth contactor which are arranged in series, and the fourth acquisition module is arranged between the fourth contactor and the electric heating unit.

7. The rail air conditioning unit monitoring system according to any one of claims 1 to 6, characterized in that: The electrical parameters collected by the main circuit collection module include current and voltage; The electrical parameters collected by the branch acquisition module include current, and the branch acquisition module is configured as a current sensor.

8. A rail air conditioning unit monitoring system according to claim 7, characterized in that: The main circuit acquisition module is used to collect the current value of any phase of the main circuit; And / or the branch collection module is used to collect the current value of any phase of the branch.

9. The rail air conditioning unit monitoring system according to any one of claims 1 to 6, characterized in that: The main channel acquisition module and / or the branch channel acquisition module communicate with the control module via a communication bus.

10. A rail vehicle, characterized in that: A rail air conditioning unit is arranged in at least one carriage, and the rail air conditioning unit adopts the rail air conditioning unit monitoring system according to any one of claims 1 to 9.

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