Air conditioning unit ventilation control system and railway vehicle air conditioning unit

Abstract

The utility model relates to an air conditioning unit ventilation control system and a railway vehicle air conditioning unit, which comprise an air conditioning controller, a ventilator redundancy control module and a fresh air door redundancy control module, a first end and a second end of a ventilator frequency converter are respectively connected with a power supply and a ventilator; the air conditioner controller is connected with the ventilator redundancy control module and the fresh air door redundancy control module, and the ventilator redundancy control module is used for keeping the ventilator to work normally when the ventilator frequency converter is in a normal condition or an abnormal condition. And the fresh air door redundancy control module is used for keeping the fresh air door in an open state when the air conditioner controller is in a normal condition or an abnormal condition. According to the utility model, the redundancy control of the ventilator and the fresh air door is added, so that the ventilation function can still be ensured under the abnormal condition of the ventilator frequency converter, the most basic fresh air supply function can also be maintained under the abnormal condition of the air conditioner controller, and the use safety of the air conditioner unit is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of air conditioning unit ventilation control technology, especially to an air conditioning unit ventilation control system and a railway vehicle air conditioning unit. BACKGROUND

[0002] The railway vehicle air conditioner is an air conditioning unit for metro, intercity and other rail transit vehicles, and its main function is to ensure fresh air supply and ventilation function in the car. At present, the fresh air supply control of the railway vehicle air conditioner mostly adopts electric air door, which controls the air conditioning fresh air volume by controlling the air door opening degree, and the fresh air and return air are sent into the passenger compartment air duct by the ventilator. Among them, the air conditioning system can also use a variable frequency ventilator to achieve the requirements of adjusting air volume and energy saving.

[0003] The existing scheme uses a ventilator frequency converter to drive the ventilator to work. When the ventilator frequency converter fails, the ventilator frequency converter will stop running, resulting in the loss of ventilation function of the air conditioning unit. In addition, the fresh air door of the existing air conditioning unit is controlled by the air conditioning controller to control its opening degree. When the air conditioning controller fails, not only the ventilator cannot work normally, but also the fresh air door cannot be controlled or closed, resulting in the loss of fresh air supply function of the air conditioning unit, which greatly affects the safety of the air conditioning unit. UTILITY MODEL CONTENT

[0004] The utility model mainly solves the technical problem, provides an air conditioning unit ventilation control system, through increasing the redundancy control of ventilator and fresh air door, ensures that the ventilation function can be guaranteed under the abnormal condition of ventilator frequency converter, and the most basic fresh air supply function can be maintained under the abnormal condition of air conditioning controller, improves the safety of air conditioning unit use.

[0005] The utility model also provides a railway vehicle air conditioning unit using the air conditioning unit ventilation control system.

[0006] To solve the above technical problems, the basic idea of the technical scheme of the utility model is:

[0007] An air conditioning unit ventilation control system, comprising an air conditioning controller, a ventilator redundancy control module and a fresh air door redundancy control module, the air conditioning controller is connected with the ventilator frequency converter, the first end and the second end of the ventilator frequency converter are connected with the power supply and the ventilator respectively, the air conditioning controller is connected with the ventilator redundancy control module and the fresh air door redundancy control module, the ventilator redundancy control module is used for keeping the ventilator working normally when the ventilator frequency converter is in normal condition or abnormal condition, and the fresh air door redundancy control module is used for keeping the fresh air door in the open state when the air conditioning controller is in normal condition or abnormal condition.

[0008] The ventilation fan redundancy control module comprises a first contactor and a second contactor, the first end and the second end of the first contactor are connected with the second end of the ventilation fan frequency converter and the ventilation fan respectively, the first end and the second end of the second contactor are connected with the power supply and the ventilation fan respectively, the first contactor is controlled to be closed and the second contactor is controlled to be opened when the ventilation fan frequency converter is in a normal condition, and the second contactor is controlled to be attracted when the ventilation fan frequency converter is in an abnormal condition, so that the ventilation fan normally operates.

[0009] The fresh air door redundancy control module comprises a first relay and a second relay, the first relay and the second relay are connected with the air conditioner controller and the power supply respectively, the contact of the first relay is connected with the opening circuit of the fresh air door, and the contact of the second relay is connected with the closing circuit of the fresh air door, the contact of the first relay is controlled to be attracted and the contact of the second relay is controlled to be opened when the air conditioner controller is in a normal condition or an abnormal condition, the opening circuit of the fresh air door is connected, the closing circuit of the fresh air door is disconnected, and the fresh air door is in an open state.

[0010] Further, the fresh air door is controlled to be kept at the maximum opening degree when the air conditioner controller is in an abnormal condition and the opening circuit of the fresh air door is connected.

[0011] Further, the contacts of the first relay and the second relay are controlled to be disconnected when the air conditioner controller is in a normal condition and needs to keep the opening degree of the fresh air door, and the opening circuit and the closing circuit of the fresh air door are disconnected.

[0012] Further, the first relay and the second relay are intermediate relays.

[0013] The second technical scheme of the utility model adopts:

[0014] A rail vehicle air conditioning unit adopts the air conditioning unit ventilation control system.

[0015] Compared with the prior art, the air conditioning unit ventilation control system and the rail vehicle air conditioning unit have the following advantages:

[0016] (1) The utility model discloses a redundancy control of the ventilation fan, which can ensure that the ventilation fan normally works when the ventilation fan frequency converter is abnormal, thereby ensuring the normal ventilation function of the air conditioning unit, improving the reliability of the ventilation function of the air conditioning unit, and improving the safety of the air conditioning unit and the safety of train operation.

[0017] (2) The utility model discloses still through the redundancy control of new air door's increase, can ensure when the air conditioner controller appears abnormal condition, still can keep new air door in the open state, and then guarantee air conditioning unit even in the premise of losing the ventilation function, still can keep the most basic new air supply function, further improve the security of air conditioning unit use and the security of train operation.

[0018] The utility model discloses in further detailed description below in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are part of the specification, serve to further understand the utility model, and the illustrative embodiments of the utility model and the description thereof serve to explain the utility model, but do not constitute improper limitation on the utility model. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] In the drawings:

[0021] Figure 1 It is the utility model ventilation machine redundancy control module circuit diagram;

[0022] Figure 2 It is the utility model new air door redundancy control module circuit diagram (the air conditioner controller opens new air door when normal);

[0023] Figure 3 It is the utility model new air door redundancy control module circuit diagram when the air conditioner controller fails;

[0024] Figure 4 It is the utility model new air door redundancy control module circuit diagram when the air conditioner controller keeps new air door opening degree when normal;

[0025] Figure 5 It is the utility model new air door redundancy control module circuit diagram when the air conditioner controller closes new air door when normal.

[0026] In the drawings:

[0027] Air conditioner controller 1, ventilation machine redundancy control module 2, new air door redundancy control module 3, ventilation machine frequency converter 4, ventilation machine 5, new air door 6.

[0028] It should be noted that the drawings and the written description are not intended to limit the scope of the concept of the utility model in any way, but to illustrate the concept of the utility model to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in combination with the drawings in the embodiments of the utility model, the following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0030] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0031] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium.

[0032] As shown in Figure 1 and Figure 2 The utility model provides a kind of air conditioning unit ventilation control system, including air conditioning controller 1, ventilation machine redundancy control module 2 and fresh air door redundancy control module 3.

[0033] As shown in Figure 1 , air conditioning controller 1 is connected with ventilation machine frequency converter 4, simultaneously, the first end of ventilation machine frequency converter 4 is connected with power supply (not indicated in drawing), and the second end of ventilation machine frequency converter 4 is connected with ventilation machine 5.When having multiple ventilation machines 5, multiple ventilation machines 5 are connected with the second end of ventilation machine frequency converter 4 in parallel with each other.Air conditioning controller 1 and ventilation machine frequency converter 4 are in normal condition, air conditioning controller 1 controls ventilation machine frequency converter 4 according to ventilation control logic, and then controls the switch and operating state of ventilation machine 5 and the like.

[0034] In this embodiment, the ventilation fan redundancy control module 2 is connected with the air conditioner controller 1, which can keep the ventilation fan 5 working normally when the ventilation fan frequency converter 4 is in normal condition or when the ventilation fan frequency converter 4 is in abnormal condition. In this way, it can ensure that the air conditioning unit can maintain normal ventilation function under any condition, improve the reliability of the ventilation function of the air conditioning unit, and improve the safety of train operation. The ventilation fan frequency converter 4 is connected with the air conditioner controller 1, and the working state of the ventilation fan frequency converter 4 is monitored by the air conditioner controller 1. The air conditioner controller 1 can monitor the working state of the ventilation fan frequency converter 4 by using conventional technology. When the working state of the air conditioner controller 1 is abnormal, the working state of the ventilation fan frequency converter 4 will also be abnormal.

[0035] As shown in Figure 1 In this embodiment, the ventilation fan redundancy control module 2 preferably includes a first contactor KM111 and a second contactor KM112. The first end of the first contactor KM111 is connected with the second end of the ventilation fan frequency converter 4, and the second end of the first contactor KM111 is connected with the ventilation fan 5. The first end of the second contactor KM112 is directly connected with the power supply, i.e. connected with the first end of the ventilation fan frequency converter 4, and the second end of the second contactor KM112 is connected with the ventilation fan 5. Multiple ventilation fans 5 are also connected with the second end of the second contactor KM112 in parallel.

[0036] When the air conditioner controller 1 and the ventilation fan frequency converter 4 are in normal condition, the first contactor KM111 is controlled to be closed and the second contactor KM112 is controlled to be opened. At this time, the ventilation fan 5 is controlled by the ventilation fan frequency converter 4 to control its switch and running state.

[0037] When the air conditioner controller 1 monitors that the working state of the ventilation fan frequency converter 4 is in abnormal condition, the ventilation fan frequency converter 4 cannot work normally at this time. The air conditioner controller 1 controls the second contactor KM112 to be automatically attracted, controls the first contactor KM111 to be opened, and makes the ventilation fan 5 directly connected with the power supply. The ventilation fan 5 can continue to protect the normal running state. In this process, since the ventilation fan 5 is not controlled by the ventilation fan frequency converter 4, the ventilation fan 5 is in constant speed running state.

[0038] When the ventilation fan frequency converter 4 fails, the second contactor KM112 is automatically attracted by the air conditioner controller 1. Since the first end of the second contactor KM112 is directly connected with the power supply, it avoids the ventilation fan frequency converter 4 and directly controls the ventilation fan 5 to work by using the power supply, which ensures that the ventilation fan 5 can still work normally, and further ensures that the ventilation function of the air conditioning unit will not be affected, improves the reliability of the ventilation function of the air conditioning unit, and further improves the safety of the use of the air conditioning unit and the safety of train operation.

[0039] As shown in Figures 2 to 5As shown, in the embodiment, the air conditioner controller 1 is connected with the fresh air door redundancy control module 3, and the fresh air door redundancy control module 3 is used to keep the fresh air door 6 in the open state when the air conditioner controller 1 is in normal condition or abnormal condition. In this way, even when the air conditioner controller 1 is in abnormal condition (at this time, the ventilation fan 5 cannot work normally), the fresh air door 6 can be controlled to be in the open state, ensuring the basic fresh air supply function of the train, and further ensuring the safety of the train operation. The fresh air door 6 is also connected with the air conditioner controller 1, and under the normal condition of the air conditioner controller 1, the air conditioner controller 1 controls the opening and closing and the opening degree of the fresh air door 6 according to the fresh air control logic.

[0040] In the embodiment, preferably, the fresh air door redundancy control module 3 includes a first relay KA6 and a second relay KA5, the coils of the first relay KA6 and the second relay KA5 are respectively connected with the air conditioner controller 1 and the power supply, the contacts of the first relay KA6 are connected to the opening circuit of the fresh air door 6, and the contacts of the second relay KA5 are connected to the closing circuit of the fresh air door 6. In the embodiment, preferably, the first relay KA6 and the second relay KA5 are both intermediate relays.

[0041] Specifically, as shown, Figure 2 When the air conditioner controller 1 is in normal condition and needs to open the fresh air door 6, the air conditioner controller 1 controls the contacts of the second relay KA5 to be in the open state, and the contacts of the first relay KA6 to be in the attracted state, the opening circuit of the fresh air door 6 is connected with the power supply, and the closing circuit of the fresh air door 6 is disconnected, at this time, the fresh air door 6 is in the normal open state, and provides fresh air into the carriage.

[0042] As shown, Figure 3 When the air conditioner controller 1 fails and is in abnormal condition, the air conditioner controller 1 loses the control function at this time, the contacts of the second relay KA5 do not act and remain in the open state, and the contacts of the first relay KA6 also do not act and remain in the attracted state, the opening circuit of the fresh air door 6 is still connected with the power supply, and the closing circuit of the fresh air door 6 is still disconnected, at this time, the fresh air door 6 can also remain in the normal open state, ensuring the fresh air supply in the carriage.

[0043] Further, when the air conditioner controller is in abnormal condition and the opening circuit of the fresh air door 6 is connected, the fresh air door 6 is controlled to remain in the maximum opening degree, so that the air conditioning unit can provide the maximum fresh air volume in the natural convection state.

[0044] As shown, Figure 4As shown, when the working state of the air conditioner controller 1 is in the normal condition, and the opening degree of the fresh air door 6 needs to be maintained, the air conditioner controller 1 controls the first relay KA6 to actuate to be disconnected, and controls the contacts of the second relay KA5 to be in the disconnected state without action, and the opening circuit and the closing circuit of the fresh air door 6 are in the disconnected state, at this time, the fresh air door 6 does not act, and is maintained at the original opening degree.

[0045] As shown, Figure 5 As shown, when the working state of the air conditioner controller 1 is in the normal condition, and the opening degree of the fresh air door 6 needs to be maintained, the air conditioner controller 1 controls the first relay KA6 to actuate to be disconnected, and controls the contacts of the second relay KA5 to be in the disconnected state without action, and the opening circuit and the closing circuit of the fresh air door 6 are in the disconnected state, at this time, the fresh air door 6 does not act, and is maintained at the original opening degree.

[0046] The air conditioning unit ventilation control system has the following beneficial effects after adopting the above scheme:

[0047] 1. The air conditioning unit ventilation control system can ensure that the ventilator works normally when the frequency converter of the ventilator abnormally, thereby ensuring the normal ventilation function of the air conditioning unit, improving the reliability of the ventilation function of the air conditioning unit, and improving the safety of the use of the air conditioning unit and the safety of train operation.

[0048] 2. The air conditioning unit ventilation control system can ensure that the fresh air door is in the open state when the air conditioner controller abnormally, thereby ensuring that the air conditioning unit can maintain the most basic fresh air supply function even if the ventilation function is lost, and further improving the safety of the use of the air conditioning unit and the safety of train operation.

[0049] The utility model also simultaneously provides a kind of rail vehicle air conditioning unit, including shell, is installed with the refrigerant circulation loop connected by pipeline in succession in shell, simultaneously also include control system, control system has adopted the air conditioning unit ventilation control system as described above.

[0050] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form, although the utility model has been disclosed as above with preferred embodiment, however, it is not used to limit the utility model, any skilled person in the art can make some changes or modifications for equivalent embodiment of equivalent change within the scope of the technical scheme of the utility model by using the above-mentioned technical content, the implementation scheme in the above embodiment can be further combined or replaced, as long as it does not deviate from the content of the technical scheme of the utility model, any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model are still within the scope of the utility model scheme.

Claims

1. An air conditioning unit ventilation control system, characterized by: The air conditioning control device, the ventilator redundancy control module and the fresh air door redundancy control module, the air conditioning control device is connected with the ventilator frequency converter, the first end and the second end of the ventilator frequency converter are connected with the power supply and the ventilator respectively, the air conditioning control device is connected with the ventilator redundancy control module and the fresh air door redundancy control module, the ventilator redundancy control module is used to keep the ventilator working normally when the ventilator frequency converter is in normal or abnormal condition, the fresh air door redundancy control module is used to keep the fresh air door in the open state when the air conditioning control device is in normal or abnormal condition; The ventilator redundancy control module includes the first contactor and the second contactor, the first end and the second end of the first contactor are connected with the second end of the ventilator frequency converter and the ventilator respectively, the first end and the second end of the second contactor are connected with the power supply and the ventilator respectively, when the ventilator frequency converter is in normal condition, the first contactor is controlled to be closed and the second contactor is controlled to be disconnected, when the ventilator frequency converter is in abnormal condition, the second contactor is controlled to be attracted, so that the ventilator works normally; The fresh air door redundancy control module includes the first relay and the second relay, the first relay and the second relay are connected with the air conditioning control device and the power supply respectively, the contact of the first relay is connected with the open circuit of the fresh air door, the contact of the second relay is connected with the closed circuit of the fresh air door, when the air conditioning control device is in normal or abnormal condition, the contact of the first relay is kept attracted and the contact of the second relay is kept disconnected, the open circuit of the fresh air door is connected, the closed circuit of the fresh air door is disconnected, so that the fresh air door is in the open state.

2. The air conditioning unit ventilation control system of claim 1, wherein: When the air conditioning control device is in abnormal condition and the open circuit of the fresh air door is connected, the fresh air door is controlled to keep in the maximum opening degree.

3. The air conditioning unit ventilation control system of claim 1, wherein: When the air conditioning control device is in normal condition and needs to keep the opening degree of the fresh air door, the contacts of the first relay and the second relay are controlled to be disconnected, the open circuit and the closed circuit of the fresh air door are disconnected.

4. The air conditioning unit ventilation control system of claim 1, wherein: The first relay and the second relay are both intermediate relays.

5. A rail vehicle air conditioning unit, characterized by: The air conditioning unit ventilation control system is adopted.

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