Air conditioner air valve testing circuit and testing device thereof
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 南京地铁运营有限责任公司
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-03
AI Technical Summary
The lack of professional testing equipment for air conditioning valve actuators in the current technology leads to a large amount of manpower and resources being consumed in the troubleshooting and testing process.
An air conditioning damper test circuit and its test device were designed, including components such as a rectifier, a signal feedback unit, a microcontroller, an actuator, and indicator lights. The circuit enables manual and automatic test modes, controls the switching action of the damper actuator through the microcontroller, and displays the test results on an OLED screen.
It enables rapid and accurate fault detection of air conditioning valve actuators, reduces the time spent on repeated vehicle repairs, and improves detection efficiency and visualization.
Smart Images
Figure CN224456178U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of air valve testing technology, specifically relating to an air conditioner air valve testing circuit and its testing device. Background Technology
[0002] With the widespread use of subway trains, air conditioning, a crucial component affecting passenger comfort, is experiencing frequent malfunctions due to high-intensity and prolonged use. Among these malfunctions, the air conditioning damper actuator is a common problem. The lack of specialized repair equipment necessitates repeated installation and testing on different trains, resulting in a significant waste of manpower and resources. Utility Model Content
[0003] Purpose of the utility model: To provide an air conditioner damper test circuit that solves the above-mentioned problems existing in the prior art.
[0004] Technical Solution: An air conditioner damper test circuit includes a rectifier. The input terminal of the rectifier is connected to AC power. The output terminal of the rectifier is simultaneously connected to the input terminal of a signal feedback unit, the input terminal of a microcontroller U1, and the input terminal of an execution unit via a feedback switch S1. The output terminal of the signal feedback unit is connected to the input terminal of the microcontroller U1. The output terminal of the execution unit is connected to a device. The output terminals of the manual control unit and the automatic control unit are connected to the input terminal of the microcontroller U1. The output terminal of the microcontroller U1 is simultaneously connected to the input terminal of the signal feedback unit, an OLED display screen, and the input terminal of the execution unit. A mode selection switch is connected between the microcontroller U1 and the execution unit. The other end of the mode selection switch is connected to an external device via a selection switch PCS2.
[0005] Preferably, the manual control unit includes a selection switch PCS1, which includes contacts 1, 2, 3, 4, 11, 12, 13, and 14. Contact 1 of selection switch PCS1 is connected to contact 2 of feedback switch S1, and contact 3 of selection switch PCS1 is connected to contact 3 of feedback switch S1. Contact 2 of selection switch PCS1 is simultaneously connected to the input terminal of the feedback unit and pin 30 of microcontroller U1. Contact 4 of selection switch PCS1 is simultaneously connected to the input terminal of the signal feedback unit and pin 29 of microcontroller U1. Contact 12 of selection switch PCS1 is connected to pin 18 of microcontroller U1. Contact 11 of selection switch PCS1 is connected to the input terminal of the signal feedback unit, and contact 13 of selection switch PCS1 is connected to the input of the signal feedback unit.
[0006] Preferably, the automatic control unit includes an automatic test button SB1, which includes contacts 1, 2, 3, and 4. Contact 3 of the automatic test button SB1 is connected to both contact 13 of the selector switch PCS1 and the input terminal of the signal feedback unit. Contact 4 of the automatic test button SB1 is connected to the input terminal of the signal feedback unit. Contact 1 of the automatic test button SB1 is connected to pin 33 of the microcontroller U1, and contact 2 of the automatic test button SB1 is grounded.
[0007] Preferably, the signal feedback unit includes an open-position feedback relay KM1, a closed-position relay KM2, an automatic test relay KM4, an open-position indicator light L1, a closed-position indicator light L3, a forward rotation indicator light L2, a reverse rotation indicator light L4, and an automatic test indicator light L5. Pin 1 of the open-position feedback relay KM1 is connected to contact 2 of the selector switch PCS1. Pin 2 of the open-position feedback relay KM1 is simultaneously connected to pin 1 of the closed-position relay KM2 and pin 5 of the execution relay KM3. The negative terminal of the open-position indicator light L1 is connected to pin 5 of the open-position feedback relay KM1, and the positive terminal of the open-position indicator light L1 is simultaneously connected to the closed-position indicator light L5. The positive terminal of indicator light L3 is connected to the input terminal of the signal feedback unit. Pin 1 of the execution relay KM3 is simultaneously connected to pin 2 of the open position feedback relay KM1 and pin 1 of the closed position relay KM2. Pin 2 of the execution relay KM3 is connected to pin 5 of the mode selection switch. Pin 5 of the execution relay KM3 is simultaneously connected to the positive terminal of the forward rotation indicator light L2 and the air valve motor. Pin 3 of the execution relay KM3 is simultaneously connected to the reverse rotation indicator light L4 and the air valve motor. Pin 3 of the automatic test relay KM4 is connected to the automatic test indicator light L5. Pins 1 and 5 of the automatic test relay KM4 are simultaneously connected to the output terminal of the automatic control unit.
[0008] Preferably, both the selection switch PCS2 and the selection switch PCS1 are LA39-C1-20 type selection switches.
[0009] Preferably, the microcontroller U1 is an STM32F103C8T6 microcontroller.
[0010] An air conditioning valve testing device includes a housing, inside which a circuit board is installed. The circuit board is an air conditioning valve testing circuit as described above. The top surface of the housing is equipped with a start knob, a selection knob, a test indicator light, an open position indicator light, a closed position indicator light, an on indicator light, and a off indicator light. The start knob is connected to a feedback switch S1. The selection knob is connected to a selection switch PCS1 and an automatic test button SB1. The test indicator light is connected to an automatic test indicator light L5. The open position indicator light is connected to the open position indicator light L1. The closed position indicator light is connected to the closed position indicator light L3. The on indicator light is connected to the forward rotation indicator light L2. The off indicator light is connected to the reverse rotation indicator light L4.
[0011] Beneficial Effects: This utility model relates to an air conditioning valve testing circuit. By using a test control box for air conditioning valve actuators in subway trains, it enables the inspection and testing of various air conditioning valve actuators awaiting repair along the entire line. It simulates the actual energized operating conditions of the air conditioning valve, making it easier for maintenance personnel to identify defects in the components. The test includes manual and automatic modes. In manual mode, switching between forward and reverse rotation facilitates fault diagnosis. In automatic mode, the actual operating conditions are simulated a certain number of times to test the components. This avoids spending a significant amount of time on repeated onboard inspections and adjustments. Furthermore, maintenance personnel can observe the testing status and results in real time through a visual screen. Attached Figure Description
[0012] Figure 1 This is the overall circuit diagram of this utility model. Detailed Implementation
[0013] like Figure 1As shown, this utility model provides a technical solution: an air conditioner damper test circuit, including a rectifier. The input terminal of the rectifier is connected to the mains power. The output terminal of the rectifier is simultaneously connected to the input terminal of a signal feedback unit, the input terminal of a microcontroller U1, and the input terminal of an execution unit via a feedback switch S1. The microcontroller U1 is an STM32F103C8T6 microcontroller. The output terminal of the signal feedback unit is connected to the input terminal of the microcontroller U1. The output terminal of the execution unit is connected to a device. The output terminals of the manual control unit and the automatic control unit are connected to the input terminal of the microcontroller U1. The output terminal of the microcontroller U1 is simultaneously connected to the input terminal of the signal feedback unit, an OLED display screen, and the input terminal of the execution unit. A mode selection switch is connected between the microcontroller U1 and the execution unit. The other end of the mode selection switch is connected to an external device via a selection switch PCS2. The manual control unit includes a selection switch... Selector switch PCS1, selector switch PCS2, and selector switch PCS1 are all LA39-C1-20 type selector switches. Selector switch PCS1 includes contacts 1, 2, 3, 4, 11, 12, 13, and 14. Contact 1 of selector switch PCS1 is connected to contact 2 of feedback switch S1. Contact 3 of selector switch PCS1 is connected to contact 3 of feedback switch S1. Contact 2 of selector switch PCS1 is connected to both the input terminal of the feedback unit and pin 30 of microcontroller U1. Contact 4 of selector switch PCS1 is connected to both the input terminal of the signal feedback unit and pin 29 of microcontroller U1. Contact 12 of selector switch PCS1 is connected to pin 18 of microcontroller U1. Contact 11 of selector switch PCS1 is connected to the input terminal of the signal feedback unit. Contact 13 of selector switch PCS1 is connected to the input of the signal feedback unit.
[0014] In a further embodiment, the automatic control unit includes an automatic test button SB1, which includes contacts 1, 2, 3, and 4. Contact 3 of the automatic test button SB1 is connected to both contact 13 of the selector switch PCS1 and the input terminal of the signal feedback unit. Contact 4 of the automatic test button SB1 is connected to the input terminal of the signal feedback unit. Contact 1 of the automatic test button SB1 is connected to pin 33 of the microcontroller U1. Contact 2 of the automatic test button SB1 is grounded. The signal feedback unit includes an open-position feedback relay KM1, a closed-position relay KM2, an automatic test relay KM4, an open-position indicator light L1, a closed-position indicator light L3, a forward rotation indicator light L2, a reverse rotation indicator light L4, and an automatic test indicator light L5. Pin 1 of the open-position feedback relay KM1 is connected to contact 2 of the selector switch PCS1. Pin 2 is simultaneously connected to pin 1 of the closed-position relay KM2 and pin 5 of the execution relay KM3. The negative terminal of the open-position indicator L1 is connected to pin 5 of the open-position feedback relay KM1. The positive terminal of the open-position indicator L1 is simultaneously connected to the positive terminal of the closed-position indicator L3 and the input terminal of the signal feedback unit. Pin 1 of the execution relay KM3 is simultaneously connected to pin 2 of the open-position feedback relay KM1 and pin 1 of the closed-position relay KM2. Pin 2 of the execution relay KM3 is connected to pin 5 of the mode selection switch. Pin 5 of the execution relay KM3 is simultaneously connected to the positive terminal of the forward rotation indicator L2 and the air valve motor. Pin 3 of the execution relay KM3 is simultaneously connected to the reverse rotation indicator L4 and the air valve motor. Pin 3 of the automatic test relay KM4 is connected to the automatic test indicator L5. Pins 1 and 5 of the automatic test relay KM4 are simultaneously connected to the output terminal of the automatic control unit.
[0015] When the mode selection switch PCS1 is set to manual, the test control box for the subway train's air conditioning damper actuator switches to manual test mode. Switch PCS2 controls the opening and closing of the air conditioning damper actuator to locate faults. When the mode selection switch PCS1 is set to automatic, the test control box switches to automatic test mode. A microcontroller alternately issues commands and records the signal at each rotation point for comparison, determining whether the damper motor's action and feedback are normal. Finally, the test results are displayed on an OLED screen, avoiding the need for time-consuming repetitive onboard inspections and adjustments. Simultaneously, maintenance personnel can observe the testing status and results in real time through the visual screen.
[0016] An air conditioning valve testing device includes a housing, inside which a circuit board is installed. The circuit board is an air conditioning valve testing circuit as described above. The top surface of the housing is equipped with a start knob, a selection knob, a test indicator light, an open position indicator light, a closed position indicator light, an on indicator light, and a off indicator light. The start knob is connected to a feedback switch S1. The selection knob is connected to a selection switch PCS1 and an automatic test button SB1. The test indicator light is connected to an automatic test indicator light L5. The open position indicator light is connected to the open position indicator light L1. The closed position indicator light is connected to the closed position indicator light L3. The on indicator light is connected to the forward rotation indicator light L2. The off indicator light is connected to the reverse rotation indicator light L4.
[0017] Through the above technical solution, this utility model can achieve the following working process:
[0018] When used for manual testing, after connecting the power supply, turn the knob to move the selector switch PCS1 to the manual position, and the contacts 1-2, 3-4, and 5-6 of the selector switch PCS1 will be connected.
[0019] When switch PCS2 is turned to the open position and contacts 1-2 are closed, the control execution relay KM3 is energized, causing contacts 4-5 to close and the air valve motor to perform a single forward rotation, thus opening the air valve.
[0020] When the switch is fully open, contacts 1-2 of the feedback switch S1 are directly connected to the open-position feedback relay KM1 via contacts 1-2 of the selector switch PCS1. Contacts 4-5 of the open-position feedback relay KM1 are then connected, and the open-position indicator light L1 illuminates.
[0021] When switch PCS2 is turned to the closed position, contact 1-2 is opened, and control execution relay KM3 is de-energized, causing contact 3-4 to close, and the motor performs a single reverse rotation to close the air valve.
[0022] When the open-position feedback relay KM1 is closed, contacts 1-3 of the feedback switch S1 are directly connected to the closed-position relay KM2 via contacts 3-4 of the selector switch PCS1. Contacts 4-5 of the closed-position relay KM2 are then connected, and the closed-position indicator light L3 illuminates.
[0023] When used for automatic testing, after connecting the power supply, turn the knob to set the selector switch PCS1 to the automatic position, and the contacts 5-7 of the selector switch PCS1 will be connected.
[0024] After pressing the automatic test button SB1, the microcontroller U1 sends forward and reverse motor commands, that is, the air valve motor opens and closes.
[0025] When the automatic test button KM3 is energized, it controls the motor to rotate forward, the air valve motor opens, and the indicator light L1 illuminates when the valve is in the open position.
[0026] When the air valve motor rotates to the forward position, the microcontroller U1 receives and records the forward rotation signal and issues a command to activate the open position feedback relay KM1, which turns on the open position indicator L1.
[0027] After 3 seconds, when the microcontroller determines that the forward rotation is normal, it issues a reverse command, controls the execution relay KM3 to de-energize and control the motor to reverse, the air valve motor to close, and the indicator light L3 illuminates when the valve is fully closed.
[0028] When the air valve motor is closed to the correct position, the microcontroller U1 receives and records the closed position signal and issues a command to activate the closed position relay KM2, which then illuminates the closed position indicator L3.
[0029] The microcontroller U1 will alternately issue five rounds of forward and reverse rotation commands, and record the signal of each rotation to compare and determine whether the action and feedback of the air valve motor are normal.
[0030] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.
Claims
1. An air conditioner damper test circuit, characterized by, The device includes a rectifier, whose input is connected to AC power. The output of the rectifier is simultaneously connected to the input of a signal feedback unit, the input of a microcontroller U1, and the input of an execution unit via a feedback switch S1. The output of the signal feedback unit is connected to the input of the microcontroller U1. The output of the execution unit is connected to a device. The outputs of the manual control unit and the automatic control unit are connected to the input of the microcontroller U1. The output of the microcontroller U1 is simultaneously connected to the input of the signal feedback unit, the OLED display, and the input of the execution unit. A mode selection switch is connected between the microcontroller U1 and the execution unit. The other end of the mode selection switch is connected to an external device via a selection switch PCS2.
2. The air conditioning damper testing circuit of claim 1, wherein, The manual control unit includes a selection switch PCS1, which includes contacts 1, 2, 3, 4, 11, 12, 13, and 14. Contact 1 of selection switch PCS1 is connected to contact 2 of feedback switch S1, and contact 3 of selection switch PCS1 is also connected to contact 3 of feedback switch S1. Contact 2 of selection switch PCS1 is simultaneously connected to the input terminal of the feedback unit and pin 30 of microcontroller U1. Contact 4 of selection switch PCS1 is simultaneously connected to the input terminal of the signal feedback unit and pin 29 of microcontroller U1. Contact 12 of selection switch PCS1 is connected to pin 18 of microcontroller U1. Contact 11 of selection switch PCS1 is connected to the input terminal of the signal feedback unit, and contact 13 of selection switch PCS1 is connected to the input of the signal feedback unit.
3. The air conditioning damper testing circuit of claim 1, wherein, The automatic control unit includes an automatic test button SB1, which includes contacts 1, 2, 3, and 4. Contact 3 of the automatic test button SB1 is connected to both contact 13 of the selector switch PCS1 and the input terminal of the signal feedback unit. Contact 4 of the automatic test button SB1 is connected to the input terminal of the signal feedback unit. Contact 1 of the automatic test button SB1 is connected to pin 33 of the microcontroller U1. Contact 2 of the automatic test button SB1 is grounded.
4. The air conditioning damper testing circuit of claim 2, wherein, The signal feedback unit includes an open-position feedback relay KM1, a closed-position relay KM2, an automatic test relay KM4, an open-position indicator light L1, a closed-position indicator light L3, a forward rotation indicator light L2, a reverse rotation indicator light L4, and an automatic test indicator light L5. Pin 1 of the open-position feedback relay KM1 is connected to contact 2 of the selector switch PCS1. Pin 2 of the open-position feedback relay KM1 is simultaneously connected to pin 1 of the closed-position relay KM2 and pin 5 of the execution relay KM3. The negative terminal of the open-position indicator light L1 is connected to pin 5 of the open-position feedback relay KM1, and the positive terminal of the open-position indicator light L1 is simultaneously connected to the closed-position indicator light. The positive terminal of lamp L3 is connected to the input terminal of the signal feedback unit. Pin 1 of the execution relay KM3 is simultaneously connected to pin 2 of the open position feedback relay KM1 and pin 1 of the closed position relay KM2. Pin 2 of the execution relay KM3 is connected to pin 5 of the mode selection switch. Pin 5 of the execution relay KM3 is simultaneously connected to the positive terminal of the forward rotation indicator L2 and the air valve motor. Pin 3 of the execution relay KM3 is simultaneously connected to the reverse rotation indicator L4 and the air valve motor. Pin 3 of the automatic test relay KM4 is connected to the automatic test indicator L5. Pins 1 and 5 of the automatic test relay KM4 are simultaneously connected to the output terminal of the automatic control unit.
5. The air conditioning damper testing circuit of claim 2, wherein, Both the selector switch PCS2 and the selector switch PCS1 are LA39-C1-20 model selector switches.
6. The air conditioning damper testing circuit of claim 1, wherein, The microcontroller U1 is an STM32F103C8T6 microcontroller.
7. An air conditioning damper testing device, characterized by, The device includes a housing, within which a circuit board is installed. The circuit board is an air conditioning valve test circuit according to any one of claims 1 to 6. The top surface of the housing is equipped with a start knob, a selection knob, a test indicator light, an open position indicator light, a closed position indicator light, an on indicator light, and a off indicator light. The start knob is connected to a feedback switch S1. The selection knob is connected to a selection switch PCS1 and an automatic test button SB1. The test indicator light is connected to an automatic test indicator light L5. The open position indicator light is connected to an open position indicator light L1. The closed position indicator light is connected to a closed position indicator light L3. The on indicator light is connected to a forward rotation indicator light L2. The off indicator light is connected to a reverse rotation indicator light L4.