Rail transit air-conditioning control device, its control method and control system

Abstract

The present invention discloses a rail transit air-conditioning control device, its control method and control system. The rail transit air-conditioning control device includes an air-conditioning control unit, a redundant control unit and a monitoring and switching unit. The air-conditioning control unit is used to control the ventilation switch and the air damper switch of the air-conditioning unit; the redundant control unit is used to control the ventilation switch and the air damper switch of the air-conditioning unit when the air-conditioning control unit is in an abnormal situation; the monitoring and switching unit, which is connected to the air-conditioning control unit and the redundant control unit, is used to monitor whether the air-conditioning control unit is normal; and when the air-conditioning control unit is normal, the air-conditioning control unit controls the ventilation switch and the air damper switch of the air-conditioning unit; when the air-conditioning control unit is abnormal, it switches to the redundant control unit to control the ventilation switch and the air damper switch of the air-conditioning unit. The present invention can improve the operation reliability and safety of the train.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit, and particularly relates to a rail transit air-conditioning control device, a control method thereof, and a control system thereof. Background Art

[0002] With the development of economy and technology, rail transit has become the main means of transportation in each city and one of the first choices for people to travel due to its fastness and convenience. Rail transit vehicles, as the carriers directly transporting passengers, naturally become one of the most important components of rail transit. The stability, safety, and comfort of rail transit vehicles have thus become the parts that people are most concerned about.

[0003] In the traditional rail transit air-conditioning control technical solution, only the air-conditioning control unit controls the operation of the rail transit air conditioner. When the air-conditioning control unit fails, the rail transit air-conditioning system stops working.

[0004] For the existing rail transit air-conditioning system, once a certain air-conditioning control unit fails and stops working, the corresponding carriage air conditioner will be out of control and enter the shutdown state, which will seriously affect the reliability and efficiency of vehicle operation; when an emergency occurs, the air conditioner cannot maintain the normal ventilation function, and passengers may not be able to breathe smoothly, posing a great safety hazard. Summary of the Invention

[0005] Based on this, in view of the above problems, it is necessary to provide a rail transit air-conditioning control device that can monitor whether the air-conditioning control unit in the rail transit air-conditioning control device fails, and automatically take over the control of the failed air-conditioning control unit when the air-conditioning control unit fails, improving the reliability and safety of train operation. At the same time, the present invention also provides a rail transit air-conditioning control method and a system thereof.

[0006] One technical means adopted by the present invention is: to provide a rail transit air-conditioning control device, the control device includes:

[0007] An air-conditioning control unit for controlling the ventilation switch and the damper switch of the air-conditioning unit;

[0008] A redundant control unit for controlling the ventilation switch and the damper switch of the air-conditioning unit when the air-conditioning control unit is in an abnormal situation;

[0009] A monitoring and switching unit, connected to the air-conditioning control unit and the redundant control unit, for monitoring whether the air-conditioning control unit is normal; and when the air-conditioning control unit is normal, controlling the ventilation switch and the damper switch of the air-conditioning unit by the air-conditioning control unit; when the air-conditioning control unit is abnormal, switching to the redundant control unit to control the ventilation switch and the damper switch of the air-conditioning unit.

[0010] Another technical means adopted by the present invention is: to provide a rail transit air-conditioning control method, and the control method includes:

[0011] Monitor whether the air-conditioning control unit is normal;

[0012] When the air-conditioning control unit is normal, the air-conditioning control unit controls the ventilation switch and the damper switch of the air-conditioning unit;

[0013] When the air-conditioning control unit is abnormal, switch to the redundant control unit to control the ventilation switch and the damper switch of the air-conditioning unit.

[0014] Another technical means adopted by the present invention is: to provide a rail transit air-conditioning control system, and the control system includes:

[0015] Several groups of control subsystems; each group of control subsystems includes the rail transit air-conditioning control device;

[0016] One rail transit air-conditioning control device is configured on each carriage of the rail transit vehicle.

[0017] Due to the adoption of the above technical solution, the rail transit air-conditioning control device provided by the present invention increases a redundant control unit, and the monitoring and switching unit monitors whether the air-conditioning control unit is normal. When the air-conditioning control unit is normal, the air-conditioning control unit controls the ventilation switch and the damper switch of the air-conditioning unit; when the air-conditioning control unit is abnormal, switch to the redundant control unit to control the ventilation switch and the damper switch of the air-conditioning unit. When the air-conditioning control unit fails, it automatically switches to the redundant control unit to control the ventilation switch and the damper switch of the air-conditioning unit, automatically takes over the control of the faulty air-conditioning control unit, and improves the reliability and safety of train operation. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Among them:

[0020] Figure 1 Schematic diagram of the structure of the rail transit air-conditioning control device in an embodiment Figure 1 ;

[0021] Figure 2Schematic diagram of the structure of a rail transit air - conditioning control device in an embodiment Figure 2 ;

[0022] Figure 3 Schematic diagram of the structure of a rail transit air - conditioning control device in an embodiment Figure 3 ;

[0023] Figure 4 Schematic diagram of the structure of a rail transit air - conditioning control device in an embodiment Figure 4 ;

[0024] Figure 5 Schematic diagram of the structure of a rail transit air - conditioning control device in an embodiment Figure 5 ;

[0025] Figure 6 Schematic circuit diagram of a rail transit air - conditioning control device in an embodiment;

[0026] Figure 7 Schematic diagram of the process of a rail transit air - conditioning control method in an embodiment Figure 1 ;

[0027] Figure 8 Schematic diagram of the process of a rail transit air - conditioning control method in an embodiment Figure 2 ;

[0028] Figure 9 Schematic diagram of the process of a rail transit air - conditioning control method in an embodiment Figure 3 ;

[0029] Figure 10 Flow chart of a rail transit air - conditioning control in an embodiment.

[0030] In the figure: 10, rail transit air - conditioning control device; 20, air - conditioning unit; 11, redundant control unit; 12, monitoring and switching unit; 13, air - conditioning control unit; 14, drive unit; 15, power supply; 16, acquisition unit; 141, drive circuit of unit one; 142, drive circuit of unit two; 161, acquisition circuit of unit two; 162, acquisition circuit of unit one; 21, air - conditioning unit one; 22, air - conditioning unit two. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0032] The terms "first", "second", etc. (if any) in the specification, claims and the above-mentioned drawings are used to distinguish similar parts and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than that illustrated herein.

[0033] The rail transit air-conditioning control device 10 provided by the present invention, as Figure 1 shown, in one embodiment, the rail transit air-conditioning control device 10 may include: an air-conditioning control unit 13, a redundant control unit 11, and a monitoring and switching unit 12. The air-conditioning control unit 13 can control the ventilation switch and the damper switch of the air-conditioning unit 20; the redundant control unit 11 can be used to control the ventilation switch and the damper switch of the air-conditioning unit 20 when the air-conditioning control unit 13 is in an abnormal situation; the monitoring and switching unit 12 can be connected to the air-conditioning control unit 13 and the redundant control unit 11, and is used to monitor whether the air-conditioning control unit 13 is normal; and when the air-conditioning control unit 13 is normal, the air-conditioning control unit 13 controls the ventilation switch and the damper switch of the air-conditioning unit 20; when the air-conditioning control unit 13 is abnormal, it switches to the redundant control unit 11 to control the ventilation switch and the damper switch of the air-conditioning unit 20.

[0034] The rail transit air-conditioning control device 10 provided in this embodiment monitors whether the air-conditioning control unit 13 is normal through the monitoring and switching unit 12 by adding a redundant control unit 11, and when the air-conditioning control unit 13 is normal, the air-conditioning control unit 13 controls the ventilation switch and the damper switch of the air-conditioning unit 20; when the air-conditioning control unit 13 is abnormal, it switches to the redundant control unit 11 to control the ventilation switch and the damper switch of the air-conditioning unit 20. When the air-conditioning control unit 13 fails, it automatically switches to the redundant control unit 11 to control the ventilation switch and the damper switch of the air-conditioning unit 20, and automatically takes over the control of the faulty air-conditioning control unit 13, improving the reliability and safety of train operation.

[0035] In one embodiment, as Figure 2 shown, the monitoring and switching unit 12 can be used to monitor whether the air-conditioning control signal output by the air-conditioning control unit 13 is normal; wherein, the air-conditioning control signal is used for the air-conditioning control unit 13 to control the ventilation switch and the damper switch of the air-conditioning unit 20; if it is normal, it is determined that the air-conditioning control unit 13 is in a normal state; if it is not normal, it is determined that the air-conditioning control unit 13 is in an abnormal state.

[0036] In one embodiment, as Figure 2As shown, the monitoring and switching unit 12 can also be used to monitor whether the three-phase power supply signal input to the air conditioner unit 20 is normal; the redundant control unit 11 is used to control the normal ventilation switch and the damper switch of the air conditioner unit 20 when the air conditioner control unit 13 is abnormal and the three-phase power supply signal is normal; the redundant control unit 11 is used to control the emergency ventilation switch and the damper switch of the air conditioner unit 20 when both the air conditioner control unit 13 and the three-phase power supply signal are abnormal; the air conditioner control unit 13 is used to control the normal ventilation switch and the damper switch of the air conditioner unit 20 when both the air conditioner control unit 13 and the three-phase power supply signal are normal; the air conditioner control unit 13 is used to control the emergency ventilation switch and the damper switch of the air conditioner unit 20 when the air conditioner control unit 13 is normal and the three-phase power supply signal is abnormal.

[0037] In one embodiment, the monitoring and switching unit 12 can be used to monitor whether there is an air conditioner control signal; specifically, when the monitoring and switching unit 12 monitors that there is an air conditioner control signal, it means that the air conditioner control signal is normal, and when the monitoring and switching unit 12 monitors that there is no air conditioner control signal, it means that the air conditioner control signal is abnormal.

[0038] In one embodiment, the monitoring and switching unit 12 can also be used to monitor whether there is a three-phase power supply signal. Specifically, when the monitoring and switching unit 12 monitors that there is a three-phase power supply signal, it means that the three-phase power supply signal is normal, and when the monitoring and switching unit 12 monitors that there is no three-phase power supply signal, it means that the three-phase power supply signal is abnormal.

[0039] In one embodiment, the rail transit air conditioner control device 10 can also include a power supply 15, such as Figure 3 As shown, the power supply 15 can be used to supply power to the rail transit air conditioner control device 10. The power supply 15 can provide a supply voltage for the working voltage of the rail transit air conditioner control device 10, such as 24V, 110V. Of course, the supply voltage can also be other voltage values adapted to the usage requirements.

[0040] In one embodiment, the monitoring and switching unit 12 can include several relays, and the several relays can be one or more of an intermediate relay, a three-phase detection relay, and a time relay.

[0041] Exemplarily, such as Figure 6As shown, the monitoring and switching unit 12 may include a first intermediate relay KA01; the power supply 15 provides a supply voltage of 24V for the rail transit air-conditioning control device 10. Of course, the power supply 15 may also provide a supply voltage of 110V for the rail transit air-conditioning control device 10. In this embodiment, the power supply 15 provides DC 24V power supply for the rail transit air-conditioning control device 10.

[0042] Specifically, as Figure 6 shown, the coil of the first intermediate relay KA01 may be connected in series on the communication line for transmitting the air-conditioning control signal; the first contact of the normally-closed switch of the first intermediate relay KA01 receives the power signal; the second contact of the normally-closed switch of the first intermediate relay KA01 is connected to the redundant control unit 11. Further, as Figure 6 can be seen, the moving contact of the normally-closed switch of the first intermediate relay KA01 receives the power signal; the static contact of the normally-closed switch of the first intermediate relay KA01 is connected to the redundant control unit 11. Of course, in other embodiments, it may also be that the static contact of the normally-closed switch of the first intermediate relay KA01 receives the power signal; the moving contact of the normally-closed switch of the first intermediate relay KA01 is connected to the redundant control unit 11.

[0043] In one embodiment, as Figure 6 shown, the monitoring and switching unit 12 may include at least one three-phase detection relay B11; the coil of the three-phase detection relay B11 may be connected in series on the power line for transmitting the three-phase power signal; the first contact of the normally-open switch of the three-phase detection relay B11 receives the power signal; the second contact of the normally-closed switch of the first intermediate relay KA01 is connected to the redundant control unit 11. Further, as Figure 6 can be seen, the moving contact of the normally-open switch of the three-phase detection relay B11 receives the power signal; the static contact of the normally-closed switch of the first intermediate relay KA01 is connected to the redundant control unit 11. Of course, in other embodiments, it may also be that the static contact of the normally-open switch of the three-phase detection relay B11 receives the power signal; the moving contact of the normally-closed switch of the first intermediate relay KA01 is connected to the redundant control unit 11.

[0044] In one embodiment, the redundant control unit 11 may include several relays, and the several relays may be one or more of an intermediate relay, a three-phase detection relay, and a time relay.

[0045] Exemplarily, as Figure 6As shown, the redundant control unit 11 may include a second intermediate relay KA02 and a first time relay KT01; specifically, the first ends of the coils of the second intermediate relay KA02 and the first time relay KT01 are respectively connected to the monitoring and switching unit 12. Further, the first end of the coil of the second intermediate relay KA02 is connected to the static contact of the normally open switch of the three-phase detection relay B11, and the first end of the coil of the first time relay KT01 is connected to the static contact of the normally closed switch of the first intermediate relay KA01. The second ends of the coils of the second intermediate relay KA02 and the first time relay KT01 respectively receive power signals. The first end of the coil of the first time relay KT01 is connected to the first contact of the normally open switch of the first time relay KT01. The second contact of the normally open switch of the first time relay KT01 is connected to the first contact of the normally closed switch of the second intermediate relay KA02 and the first contact of the normally open switch of the second intermediate relay KA02. The second contact of the normally closed switch of the second intermediate relay KA02 serves as the first output end and is connected to the drive unit 14. The second contact of the normally open switch of the second intermediate relay KA02 serves as the second output end and is connected to the drive unit 14. Further, as can be seen from Figure 6 it can be seen that the first end of the coil of the first time relay KT01 is connected to the moving contact of the normally open switch of the first time relay KT01. The static contact of the normally open switch of the first time relay KT01 is connected to the moving contact of the normally closed switch of the second intermediate relay KA02 and the moving contact of the normally open switch of the second intermediate relay KA02. The static contact of the normally closed switch of the second intermediate relay KA02 serves as the first output end and is connected to the drive unit 14. The static contact of the normally open switch of the second intermediate relay KA02 serves as the second output end and is connected to the drive unit 14. Of course, in other embodiments, it may also be that the first end of the coil of the first time relay KT01 is connected to the static contact of the normally open switch of the first time relay KT01, the moving contact of the normally open switch of the first time relay KT01 is connected to the static contact of the normally closed switch of the second intermediate relay KA02 and the static contact of the normally open switch of the second intermediate relay KA02, the moving contact of the normally closed switch of the second intermediate relay KA02 serves as the first output end and is connected to the drive unit 14, and the moving contact of the normally open switch of the second intermediate relay KA02 serves as the second output end and is connected to the drive unit 14.

[0046] In one embodiment, as Figure 6As shown, the redundant control unit 11 may further include a plurality of diodes for preventing electrical leakage between different circuits; the cathodes of the plurality of diodes are connected to the drive unit 14, and the anodes of a part of the plurality of diodes are connected to the second contact of the normally closed switch of the second intermediate relay KA02, and the anodes of the other part of the plurality of diodes are connected to the second contact of the normally open switch of the second intermediate relay KA02. Further, it can be seen from Figure 6 that the cathodes of the plurality of diodes are connected to the drive unit 14, the anodes of a part of the plurality of diodes are connected to the static contact of the normally closed switch of the second intermediate relay KA02, and the anodes of the other part of the plurality of diodes are connected to the static contact of the normally open switch of the second intermediate relay KA02. Of course, in other embodiments, the cathodes of the plurality of diodes are connected to the drive unit 14, the anodes of a part of the plurality of diodes are connected to the moving contact of the normally closed switch of the second intermediate relay KA02, and the anodes of the other part of the plurality of diodes are connected to the moving contact of the normally open switch of the second intermediate relay KA02.

[0047] In this embodiment, the plurality of diodes can reduce the malfunction of the air-conditioning components. For example, it can prevent the air-conditioning control unit 13 from conducting electricity in the reverse direction through the redundant control unit 11 during normal operation, resulting in abnormal power-on of other circuits and malfunction.

[0048] In one embodiment, as Figure 3 shown, the rail transit air-conditioning control device 10 may further include a drive unit 14, and the drive unit 14 may include a plurality of relays and / or a plurality of contactors. The plurality of relays may be one or more of an intermediate relay, a three-phase detection relay, and a time relay. The drive unit 14 may be connected to the air-conditioning control unit 13 and the redundant control unit 11 for driving the opening of the ventilation switch and the damper switch of the air-conditioning unit 20 according to the air-conditioning control signal or the redundant air-conditioning control signal output by the redundant control unit 11.

[0049] In one embodiment, the drive unit 14 may include an emergency ventilation drive circuit, a normal ventilation drive circuit, an emergency ventilation start drive circuit, and a damper opening drive circuit.

[0050] It should be noted that the redundant control unit 11 can control the opening of the ventilation of the air-conditioning unit 20. The redundant control unit 11 can control the opening of the damper of the air-conditioning unit 20, and can also control the closing of the damper of the air-conditioning unit 20. Further, the drive unit 14 may further include a damper closing drive circuit. As Figure 6As shown, the damper closing drive circuit may include a damper closing intermediate relay KA07. Further, the damper may include a fresh air damper and a return air damper. Under normal circumstances, the redundant control unit 11 may control the opening of the fresh air damper of the air conditioning unit 20.

[0051] Exemplarily, please refer to Figure 6 As shown, the emergency ventilation drive circuit may include a first emergency ventilation contactor KME13 and a second emergency ventilation contactor KME23; the normal ventilation drive circuit may include a first normal ventilation contactor KM13 and a second normal ventilation contactor KM23; the emergency ventilation start drive circuit may include an emergency ventilation start intermediate relay KA03; the damper opening drive circuit may include a damper opening intermediate relay KA06.

[0052] Specifically, as Figure 6As shown, the first output terminal of the redundancy control unit 11, i.e., the stationary contact of the normally closed switch of the second intermediate relay KA02, is connected to the first end of the coil of the first emergency ventilation contactor KME13, the first end of the coil of the second emergency ventilation contactor KME23, the first end of the coil of the emergency ventilation start intermediate relay KA03, and the first end of the coil of the air door opening intermediate relay KA06; the second end of the coil of the first emergency ventilation contactor KME13 is connected to the second end of the coil of the second emergency ventilation contactor KME23 and is connected to the stationary contact of the normally closed switch of the first normal ventilation contactor KM13. The moving contact of the normally closed switch of the first normal ventilation contactor KM13 is connected to the stationary contact of the normally closed switch of the second normal ventilation contactor KM23, and the moving contact of the normally closed switch of the second normal ventilation contactor KM23 is connected to the negative output terminal N24 of the power supply 15; the second end of the coil of the emergency ventilation start intermediate relay KA03 and the second end of the coil of the air door opening intermediate relay KA06 are both connected to the negative output terminal N24 of the power supply 15. Specifically, the second output terminal of the redundancy control unit 11, i.e., the stationary contact of the normally open switch of the second intermediate relay KA02, is connected to the first end of the coil of the first normal ventilation contactor KM13, the first end of the coil of the second normal ventilation contactor KM23, and the first end of the coil of the air door opening intermediate relay KA06; the second end of the coil of the first normal ventilation contactor KM13 is connected to the second end of the coil of the second normal ventilation contactor KM23 and is connected to the stationary contact of the normally closed switch of the first emergency ventilation contactor KME13. The moving contact of the normally closed switch of the first emergency ventilation contactor KME13 is connected to the stationary contact of the normally closed switch of the second emergency ventilation contactor KME23, and the moving contact of the normally closed switch of the second emergency ventilation contactor KME23 is connected to the negative output terminal N24 of the power supply 15; the second end of the coil of the air door opening intermediate relay KA06 is connected to the negative output terminal N24 of the power supply 15.

[0053] Further, as Figure 6As shown, the specific working process of the rail transit air-conditioning control device 10 is as follows: When the first intermediate relay KA01 detects a fault in the air-conditioning control unit 13, that is, the first intermediate relay KA01 is not powered on, the normally closed contact of the first intermediate relay KA01 conducts, the first time relay KT01 is powered on, and after a time delay, it conducts and the normally open contact of the first time relay KT01 closes; At this time, the three-phase detection relay B11 is used to detect whether there is an abnormality in the 380V supplied to the redundant control unit 11. If there is an abnormality, the second intermediate relay KA02 is not powered on. At this time, the normally closed contact of the second intermediate relay KA02 conducts, controlling the first normal ventilation contactor KM13, the second normal ventilation contactor KM23, the first emergency ventilation contactor KME13, the second emergency ventilation contactor KME23, the emergency ventilation start intermediate relay KA03, and the air door opening intermediate relay KA06 to work, realizing the emergency ventilation of the air conditioner and the full-open function of the air door; If there is no abnormality, the second intermediate relay KA02 is powered on. At this time, the normally open contact of the second intermediate relay KA02 conducts, controlling the first normal ventilation contactor KM13, the second normal ventilation contactor KM23, the first emergency ventilation contactor KME13, the second emergency ventilation contactor KME23, and the air door opening intermediate relay KA06 to work, realizing the normal ventilation of the air conditioner and the full-open function of the air door;

[0054] In this embodiment, the forward conduction and reverse cut-off characteristics of the diode are utilized to prevent electric leakage between different circuits and reduce the misoperation of air-conditioning components. The self-locking between relay components is utilized to avoid the logical judgment error of the redundant control unit 11. By adding the redundant control unit 11 in this embodiment, not only is it highly reliable, good in applicability and simple to implement, but also the reliability and safety of the rail transit air-conditioning control system are improved. By reasonably matching hardware facilities such as intermediate relays, three-phase detection relays, and contactors, the normal operation of the rail transit air conditioner under certain special circumstances is realized, and the reliability and safety of train operation are improved.

[0055] In one embodiment, as Figure 4 shown, the air-conditioning unit 20 may include air-conditioning unit one 21 and air-conditioning unit two 22; It can be seen from the figure that the air-conditioning control unit 13 can control the fans, air doors, and others of air-conditioning unit one 21 and air-conditioning unit two 22, and the redundant control unit 11 can only control the fan and air door functions of air-conditioning unit one 21 and air-conditioning unit two 22 when the air-conditioning control unit 13 fails.

[0056] In one embodiment, as Figure 5As shown, the rail transit air - conditioner control device 10 may further include a collection unit 16, and the collection unit 16 is connected to the air - conditioner control unit 13 and the air - conditioner unit 20. The collection unit 16 may include a first - unit collection circuit 162 and a second - unit collection circuit 161. The drive unit 14 may include a first - unit drive circuit 141 and a second - unit drive circuit 142. Further, the first - unit drive circuit 141 is connected to the first air - conditioner unit 21, the second - unit drive circuit 142 is connected to the second air - conditioner unit 22, the first air - conditioner unit 21 is connected to the air - conditioner control unit 13 via the first - unit collection circuit 162, and the second air - conditioner unit 22 is connected to the air - conditioner control unit 13 via the second - unit collection circuit 161.

[0057] The present invention also provides a rail transit air - conditioner control method, which controls the ventilation switch and the air - door switch of the air - conditioner unit 20 according to the rail transit air - conditioner control device 10 provided in any of the above - mentioned embodiments. Specifically, in one embodiment, as Figure 7 shown, the control method may include:

[0058] Step S1: Monitor whether the air - conditioner control unit is normal;

[0059] Step S2: When the air - conditioner control unit is normal, the air - conditioner control unit controls the ventilation switch and the air - door switch of the air - conditioner unit;

[0060] Step S3: When the air - conditioner control unit is abnormal, switch to the redundant control unit to control the ventilation switch and the air - door switch of the air - conditioner unit.

[0061] The rail transit air - conditioner control method provided in this embodiment monitors whether the air - conditioner control unit is normal. When the air - conditioner control unit is abnormal, it switches to the redundant control unit to control the ventilation switch and the air - door switch of the air - conditioner unit, automatically taking over the control of the faulty air - conditioner control unit, and improving the reliability and safety of train operation.

[0062] In one embodiment, as Figure 8 shown, step S1 may include:

[0063] Step S11: Monitor whether the air - conditioner control signal output by the air - conditioner control unit is normal; wherein, the air - conditioner control signal is used for the air - conditioner control unit to control the ventilation switch and the air - door switch of the air - conditioner unit;

[0064] Step S12: If it is normal, determine that the air - conditioner control unit is in a normal state;

[0065] Step S13: If it is not normal, determine that the air - conditioner control unit is in an abnormal state.

[0066] In one embodiment, as Figure 9 shown, after step S1, it may further include:

[0067] Step S4: Monitor whether the three-phase power supply signal input to the air-conditioning unit is normal;

[0068] Step S5: When the air-conditioning control unit is abnormal and the three-phase power supply signal is normal, switch to the redundant control unit to control the normal ventilation switch and damper switch of the air-conditioning unit;

[0069] Step S6: When both the air-conditioning control unit and the three-phase power supply signal are abnormal, switch to the redundant control unit to control the emergency ventilation switch and damper switch of the air-conditioning unit;

[0070] Step S7: When both the air-conditioning control unit and the three-phase power supply signal are normal, the air-conditioning control unit controls the normal ventilation switch and damper switch of the air-conditioning unit;

[0071] Step S8: When the air-conditioning control unit is normal and the three-phase power supply signal is abnormal, the air-conditioning control unit controls the emergency ventilation switch and damper switch of the air-conditioning unit.

[0072] As Figure 10 shown, Figure 10 is a control flow chart of a rail transit air-conditioning in one embodiment.

[0073] In one embodiment, the situation of the abnormal air-conditioning control signal can be various. For example, when the air-conditioning control unit 13 only detects a fault in its own drive circuit, the air-conditioning control unit 13 stops outputting the normal signal of the air-conditioning control signal, and at this time the air-conditioning control signal is abnormal. When the monitoring and switching unit 12 monitors that the air-conditioning control signal is abnormal, it cuts off the drive circuit in the air-conditioning control unit 13 and switches to the redundant control unit 11 to control the normal ventilation switch and damper switch of the air-conditioning unit 20, realizing the functions of normal ventilation and damper switch control of the air-conditioning. When the monitoring and switching unit 12 monitors that the air-conditioning control signal is abnormal and the three-phase power supply signal provided to the air-conditioning unit 20 is also abnormal, it switches to the redundant control unit 11 to control the emergency ventilation switch and the damper switch of the air-conditioning unit 20 to ensure that the air-conditioning can continue to operate in case of an emergency.

[0074] In one embodiment, when the monitoring and switching unit 12 monitors that the condition for the air conditioner control unit 13 to allow the air conditioner to be turned on is not met, the air conditioner control signal is abnormal at this time. Then it switches to the redundant control unit 11, and the redundant control unit 11 takes over the drive circuit of the air conditioner control unit 13 to control the air conditioner unit 20, realizing the ventilation and damper control functions of the air conditioner, preventing the failure of the air conditioner control unit 13 and the shutdown of the air conditioner.

[0075] In one embodiment, after the air conditioner control unit 13 fails, the air conditioner control signal is abnormal at this time; then it switches to the redundant control unit 11 to control the ventilation switch and damper switch of the air conditioner unit 20.

[0076] The present invention also provides a rail transit air conditioner control system. In one embodiment, the control system may include several groups of control subsystems; each group of control subsystems may include the rail transit air conditioner control device 10 described in any of the above embodiments; one such rail transit air conditioner control device 10 is configured on each carriage of the rail transit vehicle.

[0077] For the rail transit air conditioner control system provided in this embodiment, the rail transit air conditioner control device 10 can automatically monitor whether the internal air conditioner control unit 13 fails. When the air conditioner control unit 13 fails, the redundant control unit 11 automatically takes over the control of the failed air conditioner control unit 13, improving the reliability and safety of train operation.

[0078] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0079] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A rail transit air-conditioning control device, characterized in that, The control device includes: An air-conditioning control unit for controlling the ventilation switch and the damper switch of the air-conditioning unit; A redundant control unit for controlling the ventilation switch and the damper switch of the air-conditioning unit when the air-conditioning control unit is in an abnormal situation; A monitoring and switching unit, connected to the air-conditioning control unit and the redundant control unit, for monitoring whether the air-conditioning control unit is normal; and when the air-conditioning control unit is normal, controlling the ventilation switch and the damper switch of the air-conditioning unit by the air-conditioning control unit; when the air-conditioning control unit is abnormal, switching to the redundant control unit to control the ventilation switch and the damper switch of the air-conditioning unit; The monitoring and switching unit is further used for monitoring whether the three-phase power supply signal input to the air-conditioning unit is normal; The redundant control unit is used for controlling the normal ventilation switch and the damper switch of the air-conditioning unit when the air-conditioning control unit is abnormal and the three-phase power supply signal is normal; The redundant control unit is used for controlling the emergency ventilation switch and the damper switch of the air-conditioning unit when both the air-conditioning control unit and the three-phase power supply signal are abnormal; The air-conditioning control unit is used for controlling the normal ventilation switch and the damper switch of the air-conditioning unit when both the air-conditioning control unit and the three-phase power supply signal are normal; The air-conditioning control unit is used for controlling the emergency ventilation switch and the damper switch of the air-conditioning unit when the air-conditioning control unit is normal and the three-phase power supply signal is abnormal.

2. The rail transit air-conditioning control device according to claim 1, wherein The monitoring and switching unit is used for monitoring whether the air-conditioning control signal output by the air-conditioning control unit is normal; wherein, the air-conditioning control signal is used for the air-conditioning control unit to control the ventilation switch and the damper switch of the air-conditioning unit; if it is normal, it is determined that the air-conditioning control unit is in a normal state; if it is not normal, it is determined that the air-conditioning control unit is in an abnormal state.

3. The rail transit air-conditioning control device according to claim 2, wherein The monitoring and switching unit is used for monitoring whether the air-conditioning control signal exists.

4. The rail transit air-conditioning control device according to claim 1, wherein The monitoring and switching unit is used for monitoring whether the three-phase power supply signal exists.

5. The rail transit air-conditioning control device according to claim 2, characterized in that, The monitoring and switching unit includes: a first intermediate relay; The coil of the first intermediate relay is connected in series on the communication line for transmitting the air-conditioning control signal; The first contact of the normally closed switch of the first intermediate relay receives the power supply signal; the second contact of the normally closed switch of the first intermediate relay is connected to the redundant control unit.

6. The rail transit air-conditioning control device according to claim 1, characterized in that, The monitoring and switching unit includes: at least one three-phase detection relay; The coil of the three-phase detection relay is connected in series on the power line for transmitting the three-phase power supply signal; The first contact of the normally open switch of the three-phase detection relay receives the power supply signal; the second contact of the normally open switch of the three-phase detection relay is connected to the redundant control unit.

7. The rail transit air-conditioning control device according to claim 1, wherein The redundant control unit includes: a second intermediate relay and a first time relay; The first end of the second intermediate relay coil and the first end of the first time relay coil are respectively connected to the monitoring and switching unit. The second end of the second intermediate relay coil and the second end of the first time relay coil respectively receive power supply signals. The first end of the first time relay coil is connected to the first contact of the normally open switch of the first time relay. The second contact of the normally open switch of the first time relay is connected to the first contact of the normally closed switch of the second intermediate relay and the first contact of the normally open switch of the second intermediate relay. The second contact of the normally closed switch of the second intermediate relay serves as the first output end and is connected to the driving unit. The second contact of the normally open switch of the second intermediate relay serves as the second output end and is connected to the driving unit.

8. The rail transit air conditioner control device according to claim 7, characterized in that The redundant control unit further includes: a plurality of diodes for preventing electrical leakage between different circuits; The cathodes of the plurality of diodes are connected to the driving unit. The anodes of a part of the plurality of diodes are connected to the second contact of the normally closed switch of the second intermediate relay, and the anodes of the other part of the diodes are connected to the second contact of the normally open switch of the second intermediate relay.

9. The rail transit air-conditioning control device according to claim 2, wherein The control device further includes: A driving unit, connected to the air conditioner control unit and the redundant control unit, for driving the opening of the ventilation switch and the damper switch of the air conditioner unit according to the air conditioner control signal or the redundant air conditioner control signal output by the redundant control unit.

10. A rail transit air-conditioning control method, characterized in that, The control method includes: Monitoring whether the air conditioner control unit is normal; When the air conditioner control unit is normal, controlling the ventilation switch and the damper switch of the air conditioner unit by the air conditioner control unit; When the air conditioner control unit is abnormal, switching to the redundant control unit to control the ventilation switch and the damper switch of the air conditioner unit; After the step of monitoring whether the air conditioner control unit is normal, it includes: Monitoring whether the three-phase power supply signal input to the air conditioner unit is normal; When the air conditioner control unit is abnormal and the three-phase power supply signal is normal, switching to the redundant control unit to control the normal ventilation switch and the damper switch of the air conditioner unit; When both the air conditioner control unit and the three-phase power supply signal are abnormal, switching to the redundant control unit to control the emergency ventilation switch and the damper switch of the air conditioner unit; When both the air conditioner control unit and the three-phase power supply signal are normal, controlling the normal ventilation switch and the damper switch of the air conditioner unit by the air conditioner control unit; When the air conditioner control unit is normal and the three-phase power supply signal is abnormal, controlling the emergency ventilation switch and the damper switch of the air conditioner unit by the air conditioner control unit.

11. The rail transit air-conditioning control method according to claim 10, characterized in that, The step of monitoring whether the air conditioner control unit is normal includes: Monitoring whether the air conditioner control signal output by the air conditioner control unit is normal; wherein, the air conditioner control signal is used for the air conditioner control unit to control the ventilation switch and the damper switch of the air conditioner unit; If it is normal, it is determined that the air conditioner control unit is in a normal state; If it is not normal, it is determined that the air conditioner control unit is in an abnormal state.

12. A rail transit air conditioning control system, characterized in that, The control system includes: Several groups of control subsystems; each group of control subsystems includes the rail transit air-conditioning control device according to any one of claims 1 to 9; One of the rail transit air-conditioning control devices is arranged on each carriage of the rail transit vehicle.

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