Air volume control valve control system and rail transit air conditioning system

Abstract

The utility model provides an air volume control valve control system and a rail transit air conditioning system. The air volume control valve control system comprises an air valve actuator, a voltage division circuit and a controller. The controller comprises a control end and an analog input end; the air valve actuator comprises a control signal input port and a feedback signal output port, the control signal input port is connected with the control end, the voltage division circuit is connected between the feedback signal output port and the analog quantity input end, the voltage division circuit carries out voltage division on an output value of the feedback signal output end, and the feedback signal output port is connected with the analog quantity input end. And the output value after voltage division is matched with the signal amplitude of the analog quantity input end. As the voltage division circuit is arranged in the air volume control valve control system, the feedback signal of the air valve actuator can be fed back to the controller through the voltage division circuit, the system cannot lose the capability of detecting the feedback of the air valve actuator, and the influence on the air volume control function of the air conditioning system can be effectively avoided; and therefore, the air valve system can operate stably and reliably.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning control, and in particular to an air volume control valve control system and a rail transit air conditioning system. Background Art

[0002] Rail transit air conditioning system is a mechatronic, hardware-software integrated system. For the air conditioning system, in order to make the ambient temperature in the rail transit vehicle compartment ventilated and comfortable, it is particularly important to ensure the normal fresh air control function of the air conditioning unit.

[0003] In the process of implementing the present invention, the inventors found that the prior art has at least the following problems:

[0004] In the existing scheme, in order to make the fresh air volume control more accurate, the damper actuator of the rail transit air conditioning system adopts an analog control and feedback scheme with a voltage specification (for example, 2-10V). For the controller, the resources of the analog input port are often limited, and in order to adapt to a variety of sensors and actuators, different analog ports are adapted to ports with different voltage specifications or different current specifications, such as 0-10V, 0-5V, NTC, 4-20mA and other types. Once the analog input port with the voltage specification corresponding to the damper actuator is occupied by other important functions, and only the analog input port with other voltage specifications (such as 0-5V, NTC, 4-20mA) is left, the air conditioning system will lose the ability to detect the feedback of the damper actuator and cannot determine the action status of the damper. Therefore, under the existing scheme, the damper feedback circuit cannot ensure the stable and reliable operation of the damper system. Utility Model Content

[0005] Based on this, the present application provides an air volume control valve control system and a rail transit air conditioning system, which can effectively avoid affecting the air volume control function of the air conditioning system, so as to ensure stable and reliable operation of the air valve system.

[0006] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0007] In the first aspect, an embodiment of the present application provides an air volume control valve control system, comprising: an air valve actuator, a voltage divider circuit and a controller; the controller comprises a control end and an analog input end; the air valve actuator comprises a control signal input port and a feedback signal output port, the control signal input port is connected to the control end, the voltage divider circuit is connected between the feedback signal output port and the analog input end, the voltage divider circuit divides the output value of the feedback signal output end, and the output value after voltage division matches the signal amplitude of the analog input end.

[0008] Optionally, the system also includes a power supply module, which is connected to the power supply end of the controller and the air valve actuator; the voltage divider circuit includes a first voltage divider resistor and a second voltage divider resistor, and the first voltage divider resistor and the second voltage divider resistor are connected in series between the analog input end and the negative pole of the power supply module; the feedback signal output port is connected to the electrical node between the first voltage divider resistor and the second voltage divider resistor.

[0009] Optionally, the analog input terminal is a 0-5V analog input port.

[0010] Optionally, the controller determines a real feedback value according to a voltage division ratio between the first voltage division resistor and the second voltage division resistor and an output value received by the analog input terminal.

[0011] Optionally, the analog quantity input terminal includes a first analog quantity input terminal and a second analog quantity input terminal whose signal amplitude is smaller than that of the first analog quantity input terminal, the signal amplitude of the first analog quantity input terminal matches the output value of the feedback signal output port, and the second analog quantity input terminal is electrically connected to a voltage divider circuit;

[0012] When the first analog input terminal is occupied, the feedback signal output port communicates with the second analog input terminal through the voltage divider circuit.

[0013] Optionally, the first analog input terminal is a 0-10V analog port, and the second analog input terminal is a 0-5V analog port.

[0014] Optionally, the air volume control valve control system further includes an I / O expansion module, wherein the I / O expansion module includes an input port and a plurality of output ports with different voltage specifications;

[0015] The feedback signal output port of the air valve actuator is electrically connected to the analog input terminal through the I / O expansion module.

[0016] Optionally, the input port of the I / O expansion module is connected to the feedback signal output port, and is electrically connected to the analog input terminal of the controller through an output port that matches the output value of the feedback signal output port.

[0017] Optionally, the air valve actuator includes a variable resistance element, and the variable resistance element collects the output value of the feedback signal output port and feeds it back to the analog input terminal.

[0018] In a second aspect, the present application provides a rail transit air-conditioning system, including a ventilation system, an electric air volume control valve connected to the ventilation system, and an air volume control valve control system as provided in any embodiment of the present application.

[0019] Compared with the prior art, the present application has at least the following beneficial effects: the air volume control valve control system provided by the present application is applied to the air conditioning system. Since a voltage divider circuit is provided in the air volume control valve control system, the feedback signal of the air valve actuator can be fed back to the controller through the voltage divider circuit. Even if the analog input port that adapts to the voltage specification corresponding to the air valve actuator is occupied by other important functions, the air conditioning system will not lose the ability to detect the feedback of the air valve actuator, thereby effectively avoiding affecting the air volume control function of the air conditioning system, thereby enabling the air valve system to operate stably and reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure is a schematic diagram of an air volume control valve control system provided in the prior art.

[0021] Figure 2 A schematic diagram of an air volume control valve control system provided in one embodiment of the present application.

[0022] Figure 3 A schematic diagram of an air volume control valve control system provided in another embodiment of the present application.

[0023] Figure 4 A schematic diagram of an air volume control valve control system provided in yet another embodiment of the present application.

[0024] Figure 5 The air volume control valve control system provided in one embodiment of the present application includes a schematic diagram of an I / O expansion module. DETAILED DESCRIPTION

[0025] The technical solution of the present application is further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments of the specification.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the implementation of this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "electrically connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; "electrically connected" can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] See also Figure 1 , Figure 1 Schematic diagram of the air volume control valve control system provided in the prior art. In the existing rail transit air conditioning technology, the feedback logic of the air valve actuator is mainly designed based on the analog input port of the controller, which is generally a 0-10V input port. Through the feedback logic of the air valve actuator in the existing rail transit air conditioning technology, it can be known that the air valve feedback output port of the air valve actuator is directly connected to the analog input port of the controller. When the 0-10V analog input port adapted by the controller itself is occupied by other important components and the number of ports is insufficient, the action status of the air valve actuator cannot be effectively detected, which will affect the normal air volume control function of the air conditioning system, resulting in failure of the air volume circulation control in the passenger compartment of the carriage, and easily causing passenger complaints and other problems.

[0030] In order to effectively solve the defect of insufficient analog input ports of the air valve feedback output ports of the air valve actuator in the controller of the prior art, the embodiment of the present application provides an air volume control valve control system, such as Figure 2 As shown, Figure 2The schematic diagram of the air volume control valve control system provided in one embodiment of the present application is a diagram of the air volume control valve control system 1, which includes an air valve actuator 2, a controller 3 and a voltage divider circuit 4, wherein the controller 3 includes a control terminal 31 and an analog input terminal 32. The air valve actuator 2 includes a control signal input port 21 and a feedback signal output port 22. The control signal input port 21 is connected to the control terminal 31, and the voltage divider circuit 4 is connected between the feedback signal output port 22 and the analog input terminal 32. The voltage divider circuit 4 divides the output value of the feedback signal output port 22, and the output value after voltage division matches the signal amplitude of the analog input terminal 32. The controller 3 sends a control signal to the air valve actuator 2 through the connection between the control terminal 31 and the control signal input port 21, and the air valve actuator 2 can feed back the feedback signal to the controller 3 through the connection between the feedback signal output port 22, the voltage divider circuit 4 and the analog input terminal 32.

[0031] It can be seen that the air volume control valve control system provided in the present application is applied to the air-conditioning system. Since a voltage divider circuit is set in the air volume control valve control system, the feedback signal of the air valve actuator can be fed back to the controller through the voltage divider circuit. Even if the analog input port that adapts to the voltage specification corresponding to the air valve actuator is occupied by other important functions, the air-conditioning system will not lose the ability to detect the feedback of the air valve actuator, thereby effectively avoiding affecting the air volume control function of the air-conditioning system, thereby ensuring the stable and reliable operation of the air valve system.

[0032] In some embodiments, Figure 3 As shown, the air volume control valve control system 1 also includes a power module 5, which is connected to the power supply end of the controller 3 and the air valve actuator 2 to supply power to the controller 3 and the air valve actuator 2. The voltage divider circuit 4 includes a first voltage divider resistor R1 and a second voltage divider resistor R2, which are connected in series between the analog input terminal 32 and the negative electrode of the power module 5; the feedback signal output port 22 is connected to the electrical node between the first voltage divider resistor R1 and the second voltage divider resistor R2.

[0033] In an optional implementation, the controller 3 determines the actual feedback value according to the voltage division ratio of the first voltage division resistor R1 and the second voltage division resistor R2 and the output value received by the analog input terminal 32 .

[0034] The resistance values ​​of R1 and R2 can be the same or different. When the feedback signal output port 22 outputs the feedback signal in the form of a feedback voltage, the voltage is divided by the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 in the voltage-dividing circuit 4. The voltage-dividing ratio is R1 / R2, that is, the resistance value of R1 / the resistance value of R2. The actual feedback value = the received output value / (R1 / (R1+R2)).

[0035] In an optional implementation, the analog input terminal 32 is a 0-5V analog input port. If the feedback voltage is 2-10V, the resistance values ​​of R1 and R2 can be configured to be the same, and then the voltage is divided by the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2, the output value received by the analog input terminal 32 will be halved, and the actual feedback value is twice the received output value.

[0036] In the above embodiment, a voltage divider circuit is provided in the air volume control valve control system, and voltage is divided by the first voltage divider resistor and the second voltage divider resistor in the voltage divider circuit. The feedback signal of the air valve actuator can be fed back to the controller through the voltage divider circuit. Even if the analog input port that adapts to the voltage specification corresponding to the air valve actuator is occupied by other important functions, the air conditioning system will not lose the ability to detect the feedback of the air valve actuator, thereby effectively avoiding affecting the air volume control function of the air conditioning system, thereby enabling the air valve system to operate stably and reliably.

[0037] In some embodiments, Figure 4 As shown, Figure 4 A schematic diagram of an air volume control valve control system is provided for another embodiment of the present application, wherein the analog input terminal 32 includes a first analog input terminal 320 and a second analog input terminal 321, wherein the signal amplitude of the second analog input terminal 321 is smaller than the signal amplitude of the first analog input terminal 320, the signal amplitude of the first analog input terminal 321 matches the output value of the feedback signal output port 22, and the second analog input terminal 320 is electrically connected to the voltage divider circuit 4.

[0038] When the first analog input terminal 320 is occupied, the feedback signal output port 22 communicates with the second analog input terminal 321 through the voltage divider circuit 4. When the first analog input terminal 320 is idle, the feedback signal output port 22 communicates with the first analog input terminal 320 first.

[0039] In an optional manner, the first analog input terminal 321 is a 0-10V analog port, and the second analog input terminal 320 is a 0-5V analog port. When the feedback voltage of the feedback signal output port is 2-10V, if the 0-10V analog port is occupied, the feedback signal output port 22 communicates with the second analog input terminal 320 through the voltage divider circuit 4. If the 0-10V analog port is in an idle state, the feedback signal output port 22 directly communicates with the first analog input terminal 321.

[0040] In the above embodiment, a plurality of analog input terminals are arranged in the air volume control valve control system, one of which is a port that matches the output value of the feedback signal output port, and the other feeds back the signal through a voltage divider circuit. When the port that matches the output value of the feedback signal output port is occupied, the feedback signal of the air valve actuator can be fed back to the controller through the voltage divider circuit. Even if the analog input port that adapts to the voltage specification corresponding to the air valve actuator is occupied by other important functions, the air conditioning system will not lose the ability to detect the feedback of the air valve actuator, thereby effectively avoiding affecting the air volume control function of the air conditioning system, and further ensuring the stable and reliable operation of the air valve system.

[0041] In some embodiments, Figure 5 As shown, Figure 5 The air volume control valve control system provided for an embodiment of the present application includes a schematic diagram of an I / O expansion module, the air volume control valve control system 1 also includes an I / O expansion module 6, the I / O expansion module 6 includes an input port 61 and multiple output ports 62 with different voltage specifications; the feedback signal output port 22 of the air valve actuator 2 is electrically connected to the analog input terminal 32 through the I / O expansion module.

[0042] Understandably, Figure 5 The system may also include a power module, which is connected to the power supply end of the controller 3, the air valve actuator 2 and the I / O expansion module 6.

[0043] In an optional implementation, the input port 61 of the I / O expansion module 6 is connected to the feedback signal output port 22 , and is electrically connected to the analog input terminal 32 of the controller 3 through the output port 62 matching the output value of the feedback signal output port 22 .

[0044] The I / O expansion module 6 detects the feedback signal of the feedback signal output port 22 of the damper actuator 2, selects the output port 62 that matches the output value of the feedback signal output port 22, and establishes communication with the analog input terminal 32 through the selected output port 62.

[0045] In an optional embodiment, the plurality of output ports include one or more of the following: a 0-10V output port, a 0-5V output port, a port matching a negative temperature coefficient thermistor (NTC), and a port matching 4-20mA. For example, when the feedback voltage of the feedback signal output port 22 is 2-10V, the I / O expansion module 6 selects the output port 22 matching 2-10V to establish communication with the analog input terminal 32.

[0046] In the above implementation, a voltage divider circuit and an I / O expansion module are set in the air volume control valve control system. The voltage is divided by the first voltage divider resistor and the second voltage divider resistor in the voltage divider circuit, and the feedback signal of the air valve actuator can be fed back to the controller through the voltage divider circuit; the air valve actuator can also establish a communication connection with the analog input terminal of the controller through the I / O expansion module. Even if the analog input port that adapts to the voltage specification corresponding to the air valve actuator is occupied by other important functions, the air conditioning system will not lose the ability to detect the feedback of the air valve actuator, thereby effectively avoiding affecting the air volume control function of the air conditioning system, and thus enabling the air valve system to operate stably and reliably.

[0047] In some embodiments, the damper actuator 2 includes a variable resistor element, which collects the output value of the feedback signal output port 22 of the damper actuator 2 and feeds it back to the analog input terminal 32 .

[0048] The variable resistance element includes but is not limited to a sliding resistor, a photoresistor, a thermistor, and a varistor. The analog input terminal 32 includes one or more of the following: a 0-10V output port, a 0-5V output port, a port matching a negative temperature coefficient thermistor (NTC), and a port matching 4-20mA. The air valve actuator 2 selects an analog input terminal 32 to establish a communication connection with the feedback signal output port 22 according to the current occupancy of the analog input terminal 32, and changes the output value of the feedback signal output terminal through the variable resistance element so that the output value of the feedback signal output terminal matches the signal amplitude of the analog input terminal.

[0049] In the above embodiment, a variable resistor element is provided in the air valve actuator, and the output value of the feedback signal output terminal is changed by the variable resistor element so that the output value of the feedback signal output terminal matches the signal amplitude of the analog input terminal. Even if the analog input port that adapts the voltage specification corresponding to the air valve actuator is occupied by other important functions, the air-conditioning system will not lose the ability to detect the feedback of the air valve actuator, thereby effectively avoiding affecting the air volume control function of the air-conditioning system, and further ensuring the stable and reliable operation of the air valve system.

[0050] The present application also provides a rail transit air conditioning system, including a ventilation system, an electric air volume control valve connected to the ventilation system, and an air volume control valve control system as provided in any embodiment of the present application.

[0051] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0052] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An air volume control valve control system, characterized in that: It includes a damper actuator, a voltage dividing circuit and a controller; The controller comprises a control terminal and an analog input terminal; The air valve actuator includes a control signal input port and a feedback signal output port, the control signal input port is connected to the control end, the voltage divider circuit is connected between the feedback signal output port and the analog input end, and the voltage divider circuit divides the output value of the feedback signal output port, and the output value after voltage division matches the signal amplitude of the analog input end.

2. The air volume control valve control system according to claim 1, characterized in that: The system further comprises a power supply module, wherein the power supply module is connected to the power supply end of the controller and the damper actuator; The voltage-dividing circuit comprises a first voltage-dividing resistor and a second voltage-dividing resistor, wherein the first voltage-dividing resistor and the second voltage-dividing resistor are connected in series between the analog input terminal and the negative electrode of the power module; The feedback signal output port is connected to an electrical node between the first voltage-dividing resistor and the second voltage-dividing resistor.

3. The air volume control valve control system according to claim 2, characterized in that: The analog input terminal is a 0-5V analog input port.

4. The air volume control valve control system according to claim 2, characterized in that: The controller determines a real feedback value according to a voltage division ratio between the first voltage division resistor and the second voltage division resistor and an output value received by the analog input terminal.

5. The air volume control valve control system according to claim 1, characterized in that: The analog quantity input terminal comprises a first analog quantity input terminal and a second analog quantity input terminal whose signal amplitude is smaller than that of the first analog quantity input terminal, the signal amplitude of the first analog quantity input terminal matches the output value of the feedback signal output port, and the second analog quantity input terminal is electrically connected to the voltage divider circuit; When the first analog input terminal is occupied, the feedback signal output port communicates with the second analog input terminal through the voltage divider circuit.

6. The air volume control valve control system according to claim 5, characterized in that: The first analog input terminal is a 0-10V analog port, and the second analog input terminal is a 0-5V analog port.

7. The air volume control valve control system according to claim 1, characterized in that: The air volume control valve control system further includes an I / O expansion module, wherein the I / O expansion module includes an input port and a plurality of output ports with different voltage specifications; The feedback signal output port of the air valve actuator is electrically connected to the analog input terminal through the I / O expansion module.

8. The air volume control valve control system according to claim 7, characterized in that: The input port of the I / O expansion module is connected to the feedback signal output port, and is electrically connected to the analog input terminal of the controller through an output port that matches the output value of the feedback signal output port.

9. The air volume control valve control system according to claim 1, characterized in that: The air valve actuator includes a variable resistance element, and the variable resistance element collects the output value of the feedback signal output port and feeds it back to the analog input terminal.

10. A rail transit air conditioning system, characterized in that: The invention comprises a ventilation system, an electric air volume control valve connected to the ventilation system, and an air volume control valve control system as claimed in any one of claims 1 to 9.

Images