Control circuits and methods for air conditioning systems in rail vehicles and rail vehicles

Abstract

This invention relates to the field of vehicle air conditioning control technology, providing a control circuit, method, and rail vehicle for an air conditioning system. The control circuit includes a power supply, an air conditioning controller, and a ventilation switching relay, with the power supply and air conditioning controller forming a first circuit. It also includes a first time relay and a second time relay, with the power supply, ventilation switching relay, first time relay, and second time relay forming a second circuit. The first and second time relays are respectively used to start timing when the air conditioning controller is powered on. If the air conditioning controller fails to start after power-on, and the second time relay has timed for a second duration, the second time relay controls the first circuit to disconnect. After the first time relay has timed for a third duration, the first time relay controls the second time relay to de-energize, thereby reconnecting the first circuit. This invention achieves automatic hard-wired restart in the event of an air conditioning controller failure to start after power-on.

Description

Technical Field

[0001] This invention relates to the field of vehicle air conditioning control technology, and in particular to a control circuit, method, and rail vehicle for an air conditioning system. Background Technology

[0002] During high-speed train operation, there is at least one power-on operation per day. During this process, both the vehicle's network system and air conditioning system are activated. The network system takes approximately 40 seconds to activate, and the air conditioning system takes approximately 45 seconds. Under normal circumstances, communication between the air conditioning and network systems is established 50 seconds after power-on. Considering that the air conditioning system activates more slowly than the network system, in fault diagnosis, after the network system has successfully activated, a 60-second delay is made before verifying the activation success of the air conditioning system. That is, if the air conditioning system controller fails to activate, a "communication fault in air conditioning system" will be reported 100 seconds after power-on.

[0003] If the air conditioning system controller fails to start, it will only operate in ventilation mode, with neither cooling nor heating functions working. This can cause the passenger compartment to be too hot or too cold, affecting passenger comfort and potentially leading to complaints. In this situation, a mechanic must manually power off and restart the air conditioning controller in the affected compartment to restore its normal operation. In other words, the air conditioning system controller cannot automatically restart after failing to start. Summary of the Invention

[0004] This invention provides a control circuit, method, and rail vehicle for an air conditioning system, which solves the problem in the prior art that the air conditioning controller of an air conditioning system cannot automatically restart after failing to start.

[0005] This invention provides a control circuit for an air conditioning system of a rail vehicle, comprising: a power supply, an air conditioning controller, and a ventilation switching relay, wherein the power supply and the air conditioning controller form a first circuit; and further comprising: a first time relay and a second time relay, wherein the power supply, the ventilation switching relay, the first time relay, and the second time relay form a second circuit.

[0006] The first time relay and the second time relay are respectively used to start timing when the air conditioner controller is powered on;

[0007] When the first duration is reached after power-on, and the air conditioning controller is starting normally, the air conditioning controller controls the ventilation switching relay to disconnect the second circuit so that the second time relay stops timing.

[0008] After power-on, the air conditioner controller fails to start, and after the second time relay reaches the second duration, the second time relay controls the first circuit to disconnect. After the first time relay reaches the third duration, the first time relay controls the second time relay to de-energize, so as to connect the first circuit.

[0009] Wherein, the third duration is greater than the second duration, and the second duration is greater than the first duration.

[0010] According to the present invention, a control circuit for a rail vehicle air conditioning system is provided, wherein the normally closed contact of the first time relay and the coil of the second time relay are connected in series in the second circuit and located between the normally closed contact of the ventilation switching relay and the negative terminal of the power supply, the normally closed contact of the second time relay is connected in series in the first circuit, the coil of the first time relay is connected between the positive and negative terminals of the power supply, and the coil of the ventilation switching relay is connected between the signal output terminal of the air conditioning controller and the negative terminal of the power supply.

[0011] According to a rail vehicle air conditioning system control circuit provided by the present invention, after power-on and reaching a first duration, and under the condition that the air conditioning controller is normally started, the air conditioning controller controls the ventilation switching relay to disconnect the second circuit, so as to stop the second time relay from timing, including:

[0012] After power-on and reaching the first duration, and with the air conditioning controller starting normally, the air conditioning controller sends a energizing signal to the coil of the ventilation switching relay to control the normally closed contact of the ventilation switching relay to open, thereby disconnecting the second circuit. The coil of the second time relay is de-energized, and the second time relay stops timing.

[0013] According to a rail vehicle air conditioning system control circuit provided by the present invention, after power-on, if the air conditioning controller fails to start and the second time relay reaches a second duration, the second time relay controls the first circuit to disconnect; and after the first time relay reaches a third duration, the first time relay controls the second time relay to de-energize, so as to reconnect the first circuit, comprising:

[0014] If the air conditioner controller fails to start after power-on, the second circuit remains connected, the coil of the second time relay continues to be energized, and the timing continues. After the second time relay reaches the second duration, the normally closed contact of the second time relay opens to disconnect the first circuit. After the first time relay reaches the third duration, the normally closed contact of the first time relay opens, the coil of the second time relay is de-energized, and the normally closed contact of the second time relay closes, reconnecting the first circuit to restart the air conditioner controller.

[0015] According to the present invention, a control circuit for an air conditioning system of a rail vehicle is provided, wherein the second duration differs from the first duration by 2 to 4 seconds, and the third duration differs from the second duration by 3 to 5 seconds.

[0016] According to the present invention, a control circuit for an air conditioning system of a rail vehicle has a first duration of 45s, a second duration of 47s, and a third duration of 50s.

[0017] The present invention also provides a method for restarting a rail vehicle air conditioning controller, implemented based on the rail vehicle air conditioning system control circuit of any of the above claims, the method comprising:

[0018] When the air conditioning control circuit is powered on, the first and second time relays start timing respectively.

[0019] When the first duration is reached after power-on, and the air conditioning controller is starting normally, the air conditioning controller controls the ventilation switching relay to disconnect the second circuit so that the second time relay stops timing.

[0020] After power-on, the air conditioner controller fails to start, and after the second time relay reaches the second duration, the second time relay controls the first circuit to disconnect. After the first time relay reaches the third duration, the first time relay controls the second time relay to de-energize, so as to connect the first circuit.

[0021] Wherein, the third duration is greater than the second duration, and the second duration is greater than the first duration.

[0022] According to the present invention, a method for restarting a rail vehicle air conditioning controller is provided, wherein the second duration differs from the first duration by 2 to 4 seconds, and the third duration differs from the second duration by 3 to 5 seconds.

[0023] According to the present invention, a method for restarting a rail vehicle air conditioning controller has a first duration of 45s, a second duration of 47s, and a third duration of 50s.

[0024] The present invention also provides a rail vehicle, including: the rail vehicle air conditioning system control circuit described in any of the above claims.

[0025] The rail vehicle air conditioning system control circuit, method, and rail vehicle provided by this invention, by adding a first time relay and a second time relay to the existing control circuit, enables automatic restart of the air conditioning controller via hard wiring after a failed start-up. This is achieved when, after power-on, the air conditioning controller fails to start, and the second time relay reaches a second time interval, it controls the first circuit to disconnect (powering down the air conditioning controller). After the first time relay reaches a third time interval, it controls the second time relay to de-energize, thus reconnecting the first circuit (restarting the air conditioning controller). Furthermore, this avoids manual mechanical reset operations, reduces the workload of mechanics, shortens the air conditioning ventilation time in fault modes, quickly adjusts the passenger compartment temperature, improves passenger comfort, and reduces passenger complaints. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the control circuit for the air conditioning system of a rail vehicle provided by the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0029] The control circuit of the rail vehicle air conditioning system in this embodiment of the invention is as follows: Figure 1 As shown, it includes: power supply BAT, air conditioning controller 1, and ventilation switching relay KA11. Power supply BAT and air conditioning controller 1 form a first circuit (e.g., Figure 1 (As shown by the solid arrow), that is Figure 1 In the circuit, +BAT and -BAT form a loop with the control circuit.

[0030] The control circuit also includes: a first time relay KT3 and a second time relay KT5; power supply BAT, ventilation switching relay KA11, the first time relay KT3, and the second time relay KT5 form a second circuit (e.g., Figure 1 (As shown by the dashed arrow), that is Figure 1 In the circuit, +BAT passes through ventilation switching relay KA11, first time relay KT3, and second time relay KT5, and then to -BAT.

[0031] The first time relay KT3 and the second time relay KT5 are used to start timing when the air conditioner controller 1 is powered on, with the power-on time being 0 and the timing starting from 0.

[0032] When the first duration is reached after power-on, and the air conditioning controller 1 is started normally, the air conditioning controller 1 controls the ventilation switching relay KA11 to disconnect the second circuit so that the second time relay KT5 stops timing.

[0033] After power-on, the air conditioner controller 1 fails to start, and after the second time relay KT5 reaches the second duration, the second time relay KT5 controls the first circuit to disconnect. After the first time relay KT3 reaches the third duration, the first time relay KT3 controls the second time relay KT5 to de-energize, so as to connect the first circuit, thereby realizing the hard-wired automatic restart after the air conditioner controller fails to start.

[0034] Wherein, the third duration is greater than the second duration, and the second duration is greater than the first duration.

[0035] This embodiment adds a first time relay KT3 and a second time relay KT5 to the existing control circuit. If the air conditioning controller 1 fails to start after power-on, and the second time relay KT5 times its second duration, it controls the first circuit to disconnect (power off the air conditioning controller 1). Then, after the first time relay KT3 times its third duration, it controls the second time relay KT5 to de-energize, thus reconnecting the first circuit (powering back on the air conditioning controller 1). This achieves the function of automatically restarting the air conditioning controller 1 via a hardwired connection after a failed start. Furthermore, it avoids manual mechanical reset operations, reduces the workload of mechanics, shortens the air conditioning ventilation time in fault modes, quickly adjusts the passenger compartment temperature, improves passenger comfort, and reduces passenger complaints.

[0036] In this embodiment, the normally closed contact 2 of the first time relay KT3 and the coil 3 of the second time relay KT5 are connected in series in the second circuit and located between the normally closed contact 4 of the ventilation switching relay KA11 and the negative terminal -BAT of the power supply. The normally closed contact 5 of the second time relay KT5 is connected in series in the first circuit. The coil 6 of the first time relay KT3 is connected between the positive terminal +BAT and the negative terminal -BAT of the power supply, and the coil 7 of the ventilation switching relay KA11 is connected between the signal output terminal of the air conditioner controller 1 and the negative terminal -BAT of the power supply. As long as the main switch Q6 of the air conditioner control cabinet is pressed, the air conditioner control circuit is powered on, and the coil 6 of the first time relay KT3 is always energized. This circuit structure is simple and has low implementation cost.

[0037] In this embodiment, after power-on and reaching the first duration, and with the air conditioning controller 1 starting normally, the air conditioning controller 1 controls the ventilation switching relay KA11 to disconnect the second circuit, so that the second time relay KT5 stops timing, including:

[0038] Upon power-on and after the first duration, and with the air conditioning controller 1 operating normally, the air conditioning controller 1 controls the normally closed contact 4 of the ventilation switching relay KA11 to open, thereby disconnecting the second circuit. Specifically, the air conditioning controller 1 sends an activation signal to the coil 7 of the ventilation switching relay KA11, causing the coil 7 of the ventilation switching relay KA11 to activate (i.e., the coil is energized), and its normally closed contact 4 to open, thus disconnecting the second circuit. The coil 3 of the second time relay KT5 is de-energized, and the second time relay KT5 stops timing. At this time, the air conditioning system operates normally.

[0039] In this embodiment, after power-on, if the air conditioner controller 1 fails to start and the second time relay KT5 reaches its second duration, the second time relay KT5 controls the first circuit to disconnect. Then, after the first time relay KT3 reaches its third duration, the first time relay KT3 controls the second time relay KT5 to de-energize, thereby reconnecting the first circuit. This includes:

[0040] After power-on, the air conditioner controller 1 fails to start, failing to send a signal to the coil 7 of the ventilation switching relay KA11 to engage. As a result, the normally closed contact 4 of the ventilation switching relay KA11 remains closed, meaning the second circuit remains continuous. The coil 3 of the second time relay KT5 continues to be energized, maintaining the timer. After the second time relay KT5 reaches its second duration, its normally closed contact 5 opens, disconnecting the first circuit. Then, after the first time relay KT3 reaches its third duration, its normally closed contact 2 opens, de-energizing the coil 3 of the second time relay KT5. This causes the normally closed contact 5 of the second time relay KT5 to close, reconnecting the first circuit and thus completing the hard-wired automatic restart after the air conditioner controller 1's startup failure.

[0041] It should be noted that if the air conditioner controller 1 still fails to function properly after restarting, because the normally closed contact 2 of the first time relay KT3 is open, the coil 3 of the second time relay KT5 cannot be energized and cannot start timing again. Therefore, the air conditioner controller 1 can only be hard-wired restarted once. This aligns with actual operating conditions. If the air conditioner controller 1 fails to start again, it can be considered a fault in the air conditioner controller 1, allowing staff to troubleshoot the problem promptly, rather than repeatedly restarting the air conditioner controller 1.

[0042] In some embodiments, the second duration differs from the first duration by 2 to 4 seconds, and the third duration differs from the second duration by 3 to 5 seconds.

[0043] Specifically, the first duration is 45s, the second duration is 47s, and the third duration is 50s. The specific duration can be set according to the actual situation. For example, the first duration can be set according to the actual start time of the air conditioner controller 1.

[0044] The second embodiment of the present invention provides a method for restarting the air conditioning controller of a rail vehicle air conditioning system control circuit based on the above embodiments, comprising:

[0045] Step 1: Power on the air conditioning control circuit, and the first time relay KT3 and the second time relay KT5 start timing respectively.

[0046] Step 2: After power-on, when the first duration is reached and the air conditioning controller is running normally, the air conditioning controller controls the ventilation switching relay KA11 to disconnect the second circuit, so that the second time relay KT5 stops timing.

[0047] Step 3: After power-on, the air conditioner controller fails to start, and after the second time relay KT5 reaches the second duration, the second time relay KT5 controls the first circuit to disconnect. After the first time relay KT3 reaches the third duration, the first time relay KT3 controls the second time relay KT5 to de-energize, so as to connect the first circuit.

[0048] Wherein, the third duration is greater than the second duration, and the second duration is greater than the first duration.

[0049] In this embodiment of the air conditioning controller restart method, a first time relay and a second time relay are added to the existing control circuit. If the air conditioning controller fails to start after power-on, and the second time relay times out for a second duration, the second time relay controls the first circuit to disconnect (power off the air conditioning controller). After the first time relay times out for a third duration, the first time relay controls the second time relay to de-energize, thus reconnecting the first circuit (powering back on the air conditioning controller). This achieves the function of automatically restarting the air conditioning controller via a hardwired connection after a failed start. Furthermore, it avoids manual mechanical reset operations, reduces the workload of mechanics, shortens the air conditioning ventilation time in fault modes, quickly adjusts the passenger compartment temperature, improves passenger comfort, and reduces passenger complaints.

[0050] Specifically, the second duration differs from the first duration by 2 to 4 seconds, and the third duration differs from the second duration by 3 to 5 seconds.

[0051] The first duration is 45 seconds, the second duration is 47 seconds, and the third duration is 50 seconds.

[0052] A third embodiment of the present invention provides a rail vehicle comprising: a rail vehicle air conditioning system control circuit as described in any of the preceding embodiments. After the air conditioning controller fails to start upon power-up, a hard-wired automatic restart function can automatically and quickly restart the air conditioning controller, thereby reducing the air conditioning ventilation time in fault mode, rapidly adjusting the passenger compartment temperature, improving passenger comfort, and reducing passenger complaints. This rail vehicle can be a high-speed train, a bullet train, or a subway, etc.

[0053] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0054] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control circuit for an air conditioning system of a rail vehicle, comprising: a power supply, an air conditioning controller, and a ventilation switching relay, characterized in that, Also includes: The first time relay and the second time relay, the power supply, the air conditioning controller, the normally closed contact of the second time relay and the coil of the ventilation switching relay form a first circuit, and the power supply, the normally closed contact of the ventilation switching relay, the normally closed contact of the first time relay and the coil of the second time relay form a second circuit. The first time relay and the second time relay are respectively used to start timing when the air conditioner controller is powered on; When the first duration is reached after power-on, and the air conditioning controller is starting normally, the air conditioning controller controls the ventilation switching relay to disconnect the second circuit so that the second time relay stops timing. After power-on, the air conditioner controller fails to start, and after the second time relay reaches the second duration, the second time relay controls the first circuit to disconnect. After the first time relay reaches the third duration, the first time relay controls the second time relay to de-energize, so as to connect the first circuit. Wherein, the third duration is greater than the second duration, and the second duration is greater than the first duration.

2. The control circuit for the air conditioning system of a rail vehicle according to claim 1, characterized in that, The normally closed contact of the first time relay and the coil of the second time relay are connected in series in the second circuit and located between the normally closed contact of the ventilation switching relay and the negative terminal of the power supply. The normally closed contact of the second time relay is connected in series in the first circuit. The coil of the first time relay is connected between the positive and negative terminals of the power supply. The coil of the ventilation switching relay is connected between the signal output terminal of the air conditioning controller and the negative terminal of the power supply.

3. The control circuit for the air conditioning system of a rail vehicle according to claim 2, characterized in that, Upon power-on and after the first duration has elapsed, and with the air conditioning controller starting normally, the air conditioning controller controls the ventilation switching relay to disconnect the second circuit, thereby stopping the second time relay from timing, including: After power-on and reaching the first duration, and with the air conditioning controller starting normally, the air conditioning controller sends a energizing signal to the coil of the ventilation switching relay to control the normally closed contact of the ventilation switching relay to open, thereby disconnecting the second circuit. The coil of the second time relay is de-energized, and the second time relay stops timing.

4. The control circuit for the air conditioning system of a rail vehicle according to claim 2, characterized in that, After power-on, if the air conditioner controller fails to start and the second time relay reaches its second duration, the second time relay controls the first circuit to disconnect. Then, after the first time relay reaches its third duration, the first time relay controls the second time relay to de-energize, thereby reconnecting the first circuit. This includes: If the air conditioner controller fails to start after power-on, the second circuit remains connected, the coil of the second time relay continues to be energized, and the timing continues. After the second time relay reaches the second duration, the normally closed contact of the second time relay opens to disconnect the first circuit. After the first time relay reaches the third duration, the normally closed contact of the first time relay opens, the coil of the second time relay is de-energized, and the normally closed contact of the second time relay closes, reconnecting the first circuit to restart the air conditioner controller.

5. The control circuit for the air conditioning system of a rail vehicle according to any one of claims 1 to 4, characterized in that, The second duration differs from the first duration by 2 to 4 seconds, and the third duration differs from the second duration by 3 to 5 seconds.

6. The control circuit for the air conditioning system of a rail vehicle according to claim 5, characterized in that, The first duration is 45 seconds, the second duration is 47 seconds, and the third duration is 50 seconds.

7. A method for restarting an air conditioning controller for a rail vehicle, characterized in that, The method is based on the control circuit of the rail vehicle air conditioning system according to any one of claims 1 to 6, and includes: When the air conditioning control circuit is powered on, the first and second time relays start timing respectively. When the first duration is reached after power-on, and the air conditioning controller is starting normally, the air conditioning controller controls the ventilation switching relay to disconnect the second circuit so that the second time relay stops timing. After power-on, the air conditioner controller fails to start, and after the second time relay reaches the second duration, the second time relay controls the first circuit to disconnect. After the first time relay reaches the third duration, the first time relay controls the second time relay to de-energize, so as to connect the first circuit. Wherein, the third duration is greater than the second duration, and the second duration is greater than the first duration.

8. The method for restarting a rail vehicle air conditioning controller according to claim 7, characterized in that, The second duration differs from the first duration by 2 to 4 seconds, and the third duration differs from the second duration by 3 to 5 seconds.

9. The method for restarting a rail vehicle air conditioning controller according to claim 8, characterized in that, The first duration is 45 seconds, the second duration is 47 seconds, and the third duration is 50 seconds.

10. A rail vehicle, characterized in that, include: The control circuit for the air conditioning system of a rail vehicle as described in any one of claims 1 to 6.

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