Locomotive air conditioner detection device

Abstract

A locomotive air conditioner detection device relates to an equipment testing device of a railway vehicle. The device aims at solving the problem that the working efficiency is low when an existing locomotive air conditioner is detected. The device comprises a main control module and a power output monitoring and control module. A control instruction output end of the main control unit is electrically connected with a control instruction input end of a working part of the locomotive air conditioner; the working component comprises a compressor, a condensation fan, an air inlet fan and an electric heater; the working part measuring unit comprises a current data collector and a voltage data collector; the current data acquisition unit can acquire the load current value of each working part, and the load current value output end of the current data acquisition unit is electrically connected with the load current value input end of the main control unit; the voltage data acquisition unit can acquire the input voltage value of the working part, and the input voltage value output end of the voltage data acquisition unit is electrically connected with the input voltage value input end of the main control unit.

Description

Technical Field

[0001] The utility model relates to an equipment testing device for railway vehicles. Background Art

[0002] Testing and inspection of locomotive air conditioners usually rely on manual operation to collect relevant operating parameters, including but not limited to temperature measurement, pressure reading, and electrical signal recording.

[0003] However, inspectors need to manually record various parameters of the air conditioning system under different operating conditions. This process is not only time-consuming but also prone to errors when the data volume is large. To ensure the accuracy and comprehensiveness of the data, inspectors often need to repeatedly measure and record large amounts of data at multiple locations. Manually processing this data is tedious and inefficient, making it difficult to quickly locate the problem. Utility Model Content

[0004] The purpose of the utility model is to overcome the problem of low working efficiency during the detection of the existing locomotive air conditioner and to provide a locomotive air conditioner detection device.

[0005] The locomotive air conditioner detection device of the utility model comprises a main control unit and a working component measurement unit;

[0006] The control command output terminal of the main control unit is electrically connected to the control command input terminal of the working component of the locomotive air conditioner;

[0007] The working parts include compressor, condensing fan, air inlet fan and electric heater;

[0008] The working component measurement unit includes a current data collector and a voltage data collector;

[0009] The current data collector can collect the load current value of each working component, and the load current value output terminal of the current data collector is electrically connected to the load current value input terminal of the main control unit;

[0010] The voltage data collector can collect the input voltage value of the working component, and the input voltage value output terminal of the voltage data collector is electrically connected to the input voltage value input terminal of the main control unit.

[0011] Furthermore, the working component measurement unit further includes a phase sequence converter;

[0012] The three-phase power input terminal of the phase sequence converter is electrically connected to the three-phase power supply, and the phase sequence conversion power output terminal of the phase sequence converter is electrically connected to the power input terminal of the locomotive air conditioner.

[0013] Furthermore, the working component measurement unit further includes a phase sequence detector;

[0014] The three-phase power input terminal of the phase sequence detector is electrically connected to the three-phase power supply, and the phase sequence error alarm information output terminal of the phase sequence detector is electrically connected to the phase sequence error alarm information input terminal of the main control unit;

[0015] After receiving the error alarm information, the main control unit can cut off the power supply of the three-phase device to the locomotive air conditioner.

[0016] Furthermore, the working component measurement unit also includes an overload / phase loss protector;

[0017] The overload / phase loss protector can collect and detect the load current value of each working component;

[0018] The overload alarm information output terminal and the phase loss alarm information output terminal of the overload / phase loss protector are electrically connected to the overload alarm information input terminal and the phase loss alarm information input terminal of the main control unit respectively;

[0019] After receiving the overload alarm information or the phase loss alarm information, the main control unit can cut off the power supply of the three-phase device to the locomotive air conditioner.

[0020] Furthermore, the overload / phase loss protector is a thermal relay.

[0021] Furthermore, it also includes a touch display unit;

[0022] The touch display unit can display the control buttons of the working parts;

[0023] The control button of the working component is used to generate a control instruction after being triggered, and the control instruction output end of the touch display unit is electrically connected to the control instruction input end of the main control unit.

[0024] Furthermore, the load current value display signal output terminal, input voltage value display signal output terminal, phase sequence error alarm information display signal output terminal, overload alarm information display signal output terminal and phase loss alarm information display signal output terminal of the main control unit are respectively connected to the load current value display signal input terminal, input voltage value display signal input terminal, phase sequence error alarm information display signal input terminal, overload alarm information display signal input terminal and phase loss alarm information display signal input terminal of the touch display unit.

[0025] Furthermore, the working component measurement unit further includes contactors K1 to K6 and circuit breakers Q1 to Q3;

[0026] The three-phase power supply is electrically connected to the compressor motor through contactor K1 and circuit breaker Q1 in sequence;

[0027] The three-phase power supply is electrically connected to the condensing fan motor through contactor K2 and circuit breaker Q2 in sequence;

[0028] The three-phase power supply is electrically connected to the motor of the air intake fan through contactor K3 and circuit breaker Q3 in sequence; and contactors K4 and K5 form a star-delta electrical connection with the motor winding of the air intake fan;

[0029] The three-phase power supply is electrically connected to the electric heater through contactor K6 in turn.

[0030] Furthermore, the six contactor trigger signal output terminals of the main control unit are electrically connected to the contactor trigger signal input terminals of the coils of contactors K1 to K6 respectively;

[0031] The switch status information output terminals of the normally closed contacts of contactors K1 to K6 are electrically connected to the 6 contactor switch status information input terminals of the main control unit respectively;

[0032] The contactor switch state display signal output terminal of the main control unit is electrically connected to the contactor switch state display signal input terminal of the touch display unit.

[0033] Furthermore, it also includes a temperature measuring unit;

[0034] The temperature measuring unit can obtain the air outlet temperature of the locomotive air conditioner, and the air outlet temperature output terminal of the temperature measuring unit is electrically connected to the air outlet temperature input terminal of the main control unit;

[0035] The air outlet temperature display signal output terminal of the main control unit is electrically connected to the air outlet temperature display signal input terminal of the touch display unit.

[0036] The beneficial effects of the utility model are:

[0037] The locomotive air conditioner testing device of this utility model enables the locomotive air conditioner to be started for comprehensive testing, fault finding, and repair without removing the locomotive air conditioner main unit in an off-grid area. This significantly improves the safety of locomotive air conditioner inspection and maintenance and the efficiency of fault repair and testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the external structure of the locomotive air conditioning detection device of the present utility model;

[0039] Figure 2 This is a schematic diagram of the electrical structure of the locomotive air conditioning detection device of the present utility model;

[0040] Figure 3 This is a circuit diagram of the coordination between the phase sequence detector, the phase sequence converter and the three-phase power supply in the locomotive air conditioning detection device of the present utility model;

[0041] Figure 4This is a circuit diagram of the working component drive, overload / phase loss protector, compressor motor, condenser fan motor, ventilator motor and electric heater in the locomotive air conditioning detection device of the utility model;

[0042] Figure 5 Schematic diagrams of the cooperation between the current data collector, the compressor motor, and the electric heater in the locomotive air conditioning detection device of the present utility model (top), the current data collector and the condensing fan (middle), and the current data collector and the ventilator (bottom);

[0043] Figure 6 This is a circuit diagram of the coordination of the main control unit, working component drive and air conditioner internal switch in the locomotive air conditioner detection device of the present utility model. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0045] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0046] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention. Specific implementation method 1

[0048] The locomotive air conditioning detection device of this embodiment includes a main control unit 1 and a working component measurement unit 2;

[0049] The control command output terminal of the main control unit 1 is electrically connected to the control command input terminal of the working component of the locomotive air conditioner;

[0050] The working parts include compressor, condensing fan, air inlet fan and electric heater;

[0051] The working component measurement unit 2 includes a current data collector 2-1 and a voltage data collector 2-2;

[0052] The current data collector 2-1 can collect the load current value of each working component, and the load current value output terminal of the current data collector 2-1 is electrically connected to the load current value input terminal of the main control unit 1;

[0053] The voltage data collector 2 - 2 can collect the input voltage value of the working component, and the input voltage value output terminal of the voltage data collector 2 - 2 is electrically connected to the input voltage value input terminal of the main control unit 1 .

[0054] Specifically, if Figure 1 As shown, the locomotive air conditioning detection device of this embodiment is a device independent of the locomotive air conditioning, and is used to test and detect the locomotive air conditioning in different locomotives in a movable manner. The locomotive air conditioning detection device includes a main control unit 1 (PLC) and a power output monitoring and control unit 2;

[0055] The main control unit 1 is used to control the working parts of the locomotive air conditioner according to control instructions, which include start-stop control instructions and speed control instructions, etc.; the locomotive air conditioner is controlled by simulating the various functions of the locomotive air conditioner electronic control box, and the locomotive air conditioner is driven by the three-phase power supply on the ground, solving the problem that the locomotive air conditioner needs to be tested and maintained under the contact network.

[0056] like Figure 2 As shown, this embodiment of the locomotive air conditioning detection device can monitor working components (including the compressor, condenser fan, ventilator, and electric heater). The current data collector 2-1 is used to collect the load current value of each working component, and the voltage data collector 2-2 is used to collect the input voltage value of each working component.

[0057] The current data collector 2-1 and the voltage data collector 2-2 can be selected as digital multi-function meters, which mainly perform real-time measurement and display of three-phase voltage and three-phase current.

[0058] The mobile embodiment of this invention uses three digital multi-function meters to monitor the load current of the locomotive air conditioner.

[0059] The locomotive air conditioner has four three-phase loads, namely the compressor motor, condenser fan motor, ventilator motor and electric heater. In order to reduce the volume of the test bench and meet the needs of mobile testing, the circuit design takes advantage of the fact that the cooling and heating of the locomotive air conditioner cannot be carried out at the same time. Figure 5 As shown in the figure, a set of current transformers is used. The primary power lines of the compressor motor and electric heater are inserted through the current transformers. This allows the load currents of both devices to be measured using a single set of transformers and a multimeter. Load identification is determined by controlling the relays of the compressor and electric heater. The measured current data is processed and entered into the memory of the corresponding load.

[0060] Furthermore, existing locomotive air conditioning testing and inspection methods typically require the locomotive's air conditioning system to be removed from the vehicle and transported to a workshop for testing and repair. This process requires the locomotive to be parked in the workshop, where the air conditioning system must be removed using a forklift or other handling equipment and transported to a specialized maintenance team for inspection. Once the repairs are complete, a new or repaired air conditioning unit must be reinstalled. This method not only increases work time and reduces efficiency, but also easily causes additional failures during the disassembly and assembly process. Furthermore, the entire disassembly and assembly process often requires the coordinated efforts of multiple personnel, increasing labor costs.

[0061] The shell size of the locomotive air-conditioning detection device in this embodiment is 400mm×360mm×80mm, which is small and easy to carry. There is no need to disassemble the air-conditioning host. The operator only needs to move the locomotive air-conditioning detection device to the locomotive air-conditioning for the initial inspection of the locomotive air-conditioning. Specific implementation method 2

[0063] This embodiment is a further explanation of the first embodiment. In this embodiment, the working component measuring unit 2 further includes a phase sequence converter 2-3;

[0064] The three-phase power input terminal of the phase sequence converter 2-3 is electrically connected to the three-phase power supply, and the phase sequence conversion power output terminal of the phase sequence converter 2-3 is electrically connected to the power input terminal of the locomotive air conditioner.

[0065] The other technical features of this embodiment are exactly the same as those of embodiment 1.

[0066] Specifically, the phase sequence converter 2 - 3 is used to obtain the data of the air conditioner working phase sequence from the main control unit 1 , and convert the three-phase power supply into the air conditioner working power supply that meets the air conditioner working phase sequence and then supply power to the locomotive air conditioner.

[0067] The three-phase power supply is connected to the mobile device of this embodiment through a plug, and provides positive phase sequence three-phase power supply to the subsequent equipment through the internal phase sequence converter 2-3 and phase sequence detector 2-4, ensuring that the phase sequence of the three-phase power output of the test bench is consistent with the phase sequence of the three-phase power output of the locomotive, so that the rotation direction of the motor inside the locomotive air conditioner is consistent with the rotation direction when the locomotive is powered. Figure 3 As shown in the circuit, the phase sequence converter 2-3 converts the phase sequence of the input three-phase power supply, and the phase sequence detector 2-4 (phase sequence relay) detects whether the input phase sequence is the positive phase sequence (the air conditioner operating phase sequence), sends a corresponding signal to the control unit 2, and executes the corresponding phase sequence protection program. The signal is then transmitted to the lower-level equipment through the air switch. Specific implementation method three

[0069] This embodiment is a further explanation of the second embodiment. In this embodiment, the working component measurement unit 2 further includes a phase sequence detector 2-4;

[0070] The three-phase power input terminal of the phase sequence detector 2-4 is electrically connected to the three-phase power supply, and the phase sequence error alarm information output terminal of the phase sequence detector 2-4 is electrically connected to the phase sequence error alarm information input terminal of the main control unit 1;

[0071] After receiving the error alarm information, the main control unit 1 can cut off the power supply from the three-phase device to the locomotive air conditioner.

[0072] The other technical features of this embodiment are exactly the same as those of the second embodiment.

[0073] Specifically, the phase sequence detectors 2-4 are used to detect whether the three-phase power supply conforms to the working phase sequence of the air conditioner. If the three-phase power supply does not conform to the working phase sequence of the air conditioner, a phase sequence error alarm message is generated;

[0074] The main control unit 1 is further configured to cut off the power supply from the three-phase device to the locomotive air conditioner upon receiving an error alarm message. Specific implementation method four

[0076] This embodiment is a further explanation of the first, second or third embodiment. In this embodiment, the working component measuring unit 2 further includes an overload / phase loss protector 2-5;

[0077] The overload / phase loss protector 2-5 can collect and detect the load current value of each working component;

[0078] The overload alarm information output terminal and the phase loss alarm information output terminal of the overload / phase loss protector 2-5 are electrically connected to the overload alarm information input terminal and the phase loss alarm information input terminal of the main control unit 1 respectively;

[0079] After receiving the overload alarm information or the phase loss alarm information, the main control unit 1 can cut off the power supply of the three-phase device to the locomotive air conditioner.

[0080] The other technical features of this embodiment are exactly the same as those of embodiment one, two or three.

[0081] Specifically, the overload / phase loss protector 2-5 is used to collect and detect the load current value of each working component; and when it is detected that the load current value exceeds the set overload current threshold, it generates an overload alarm message and cuts off the power supply of the three-phase device to the locomotive air conditioner; when a phase loss is detected, it generates a phase loss alarm message and cuts off the power supply of the three-phase device to the locomotive air conditioner.

[0082] like Figure 2 、 4As shown, the three-phase power output from the air conditioner is connected to the main circuit of the locomotive air conditioner load. Six contactors are used to control the main circuit power supply for the locomotive air conditioner's three motors and one electric heater. The circuit also incorporates an overload / phase loss protector 2-5 for the motor load to provide overload and phase loss protection, preventing motor burnout caused by excessive current due to stalled rotors. When the motor load overloads or a phase loss occurs, the thermal relay activates according to the protection characteristic curve before motor burnout, outputting a control signal to disconnect the coil power to the corresponding contactor, thus shutting off power to the motor. An alarm is also displayed. The overload / phase loss protector 2-5 can be set to self-reset mode within the circuit. Upon overload activation, the power supply is disconnected, and the internal bimetallic strip cools, automatically restoring the auxiliary switch to its original state. The output indication of the overload / phase loss protector 2-5 activation is turned off, allowing testing to continue. Specific implementation method five

[0084] This embodiment is a further explanation of the fourth embodiment. In this embodiment, the overload / phase loss protector 2-5 is a thermal relay.

[0085] The other technical features of this embodiment are exactly the same as those of embodiment 4. Specific implementation method six

[0087] This embodiment is a further explanation of the fifth embodiment. In this embodiment, a touch display unit 3 is further included.

[0088] The touch display unit 3 can display the working component control buttons;

[0089] The working component control button is used to generate a control instruction after being triggered, and the control instruction output end of the touch display unit 3 is electrically connected to the control instruction input end of the main control unit 1.

[0090] The other technical features of this embodiment are exactly the same as those of embodiment five.

[0091] Specifically, the touch display unit 3 (touch screen) is used to display the working component control buttons on the display interface;

[0092] The working component control buttons are used to generate control instructions after being triggered. Specific embodiment seven

[0094] This embodiment is a further explanation of embodiment six. In this embodiment, the load current value display signal output terminal, input voltage value display signal output terminal, phase sequence error alarm information display signal output terminal, overload alarm information display signal output terminal and phase loss alarm information display signal output terminal of the main control unit 1 are respectively connected to the load current value display signal input terminal, input voltage value display signal input terminal, phase sequence error alarm information display signal input terminal, overload alarm information display signal input terminal and phase loss alarm information display signal input terminal of the touch display unit 3.

[0095] The other technical features of this embodiment are exactly the same as those of embodiment 6.

[0096] Specifically, the touch display unit 3 is used to receive and display the load current value, input voltage value, phase sequence error alarm information, overload alarm information and phase loss alarm information.

[0097] The digital multi-function meter can not only measure the line current in real time, but also communicate with the touch display unit 3 via the MODBUS communication protocol in RTU transmission mode through the main control unit 1, transmitting the measured value in real time. The same applies to the phase sequence detector 2-4 and the overload / phase loss protector 2-5. Specific embodiment eight

[0099] This embodiment is a further explanation of the second, third, fifth, sixth or seventh embodiment. In this embodiment, the power output monitoring and control unit 2 further includes contactors K1 to K6 and circuit breakers Q1 to Q3.

[0100] The three-phase power supply is electrically connected to the compressor motor through contactor K1 and circuit breaker Q1 in sequence;

[0101] The three-phase power supply is electrically connected to the condensing fan motor through contactor K2 and circuit breaker Q2 in sequence;

[0102] The three-phase power supply is electrically connected to the motor of the air intake fan through contactor K3 and circuit breaker Q3 in sequence; and contactors K4 and K5 form a star-delta electrical connection with the motor winding of the air intake fan;

[0103] The three-phase power supply is electrically connected to the electric heater through contactor K6 in turn.

[0104] The other technical features of this embodiment are exactly the same as those of embodiments two, three, five, six or seven. Specific embodiment nine

[0106] This embodiment is a further explanation of the eighth embodiment. In this embodiment, the six contactor trigger signal output terminals of the main control unit 1 are electrically connected to the contactor trigger signal input terminals of the coils of contactors K1 to K6 respectively;

[0107] The switch status information output terminals of the normally closed contacts of contactors K1 to K6 are electrically connected to the six contactor switch status information input terminals of the main control unit 1 respectively;

[0108] The contactor switch status display signal output terminal of the main control unit 1 is electrically connected to the contactor switch status display signal input terminal of the touch display unit 3

[0109] The other technical features of this embodiment are exactly the same as those of embodiment eight.

[0110] Specifically, the touch display unit 3 is further used to display the switching status of the contactors K1 to K6 on the display interface.

[0111] like Figure 4 As shown, the three-phase power output by the air switch is connected to the main circuit of the locomotive air conditioner load, and six contactors (working component drive includes contactors contactor K1 to contactor K6) are used to realize the main circuit power supply control of the three motors and one electric heater of the locomotive air conditioner.

[0112] In the circuit, contactors K1 and K2 control the compressor and condensing fan respectively. Contactors K3 and K5 are used for two-speed starting control of the fan. The two-speed control circuit of the fan adopts the star-delta step-down starting method, which changes the motor wiring method to realize the conversion of different load capacities of the motor and reduce the starting current of the motor.

[0113] like Figure 6 As shown, the main control unit 1 can also be used with the locomotive air conditioner to test the on / off status of the switches in the locomotive air conditioner. Among them, S1 is the ventilator temperature protection switch, HPS is the high pressure protection switch, S2 is the condenser fan temperature protection switch, LPS is the low pressure protection switch, S3 is the pressure difference control switch, and FT is the electric heater protection switch.

[0114] The main control unit 1 controls the on / off of each switch by issuing a corresponding trigger signal and sending it to the locomotive air conditioner, and obtains the on / off status of each switch. Specific embodiment 10

[0116] This embodiment is a further explanation of the sixth, seventh or ninth embodiment. In this embodiment, a temperature measuring unit 4 is further included.

[0117] The temperature measuring unit 4 can obtain the air outlet temperature of the locomotive air conditioner, and the air outlet temperature output terminal of the temperature measuring unit 4 is electrically connected to the air outlet temperature input terminal of the main control unit 1;

[0118] The air outlet temperature display signal output terminal of the main control unit 1 is electrically connected to the air outlet temperature display signal input terminal of the touch display unit 3 .

[0119] The other technical features of this embodiment are exactly the same as those of embodiment six, seven or nine.

[0120] Specifically, the temperature measuring unit 4 (temperature detection probe) detects the temperature of the air outlet of the locomotive air conditioner to determine the cooling and heating capabilities of the locomotive air conditioner. The touch display unit 3 obtains the air outlet temperature of the locomotive air conditioner through the main control unit 1 and displays it.

[0121] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It should be understood that many modifications may be made to the illustrative embodiments, and that other arrangements may be devised, without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described herein may be combined in ways other than those described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other embodiments.

Claims

1. Locomotive air conditioning detection device, characterized in that, It comprises a main control unit (1) and a working part measuring unit (2); The control command output terminal of the main control unit (1) is electrically connected to the control command input terminal of the working component of the locomotive air conditioner; The working components include a compressor, a condensing fan, an air inlet fan and an electric heater; The working component measurement unit (2) comprises a current data collector (2-1) and a voltage data collector (2-2); The current data collector (2-1) is capable of collecting and obtaining the load current value of each working component, and the load current value output end of the current data collector (2-1) is electrically connected to the load current value input end of the main control unit (1); The voltage data collector (2-2) can collect the input voltage value of the working component, and the input voltage value output end of the voltage data collector (2-2) is electrically connected to the input voltage value input end of the main control unit (1).

2. The locomotive air conditioning detection device according to claim 1, characterized in that: The working component measuring unit (2) further includes a phase sequence converter (2-3); The three-phase power input end of the phase sequence converter (2-3) is electrically connected to the three-phase power supply, and the phase sequence conversion power output end of the phase sequence converter (2-3) is electrically connected to the power input end of the locomotive air conditioner.

3. The locomotive air conditioning detection device according to claim 2, characterized in that: The working component measuring unit (2) further includes a phase sequence detector (2-4); The three-phase power supply input end of the phase sequence detector (2-4) is electrically connected to the three-phase power supply, and the phase sequence error alarm information output end of the phase sequence detector (2-4) is electrically connected to the phase sequence error alarm information input end of the main control unit (1); After receiving the error alarm information, the main control unit (1) can cut off the power supply from the three-phase device to the locomotive air conditioner.

4. The locomotive air conditioning detection device according to claim 1, 2 or 3, characterized in that: The working component measuring unit (2) further includes an overload / phase loss protector (2-5); The overload / phase loss protector (2-5) is capable of collecting and detecting the load current value of each working component; The overload alarm information output terminal and the phase loss alarm information output terminal of the overload / phase loss protector (2-5) are electrically connected to the overload alarm information input terminal and the phase loss alarm information input terminal of the main control unit (1) respectively; The main control unit (1) is capable of cutting off the power supply from the three-phase device to the locomotive air conditioner after receiving the overload alarm information or the phase loss alarm information.

5. The locomotive air conditioning detection device according to claim 4, characterized in that: The overload / phase loss protector (2-5) is a thermal relay.

6. The locomotive air conditioning detection device according to claim 5, characterized in that: Also includes a touch display unit (3); The touch display unit (3) is capable of displaying working component control buttons; The working component control button is used to generate a control instruction after being triggered, and the control instruction output end of the touch display unit (3) is electrically connected to the control instruction input end of the main control unit (1).

7. The locomotive air conditioning detection device according to claim 6, characterized in that: The load current value display signal output terminal, input voltage value display signal output terminal, phase sequence error alarm information display signal output terminal, overload alarm information display signal output terminal and phase loss alarm information display signal output terminal of the main control unit (1) are respectively connected to the load current value display signal input terminal, input voltage value display signal input terminal, phase sequence error alarm information display signal input terminal, overload alarm information display signal input terminal and phase loss alarm information display signal input terminal of the touch display unit (3).

8. The locomotive air conditioning detection device according to claim 2, 3, 5, 6 or 7, characterized in that: The working component measuring unit (2) further includes contactors K1 to K6 and circuit breakers Q1 to Q3; The three-phase power supply is electrically connected to the compressor motor through contactor K1 and circuit breaker Q1 in sequence; The three-phase power supply is electrically connected to the condensing fan motor through contactor K2 and circuit breaker Q2 in sequence; The three-phase power supply is electrically connected to the motor of the air intake fan through contactor K3 and circuit breaker Q3 in sequence; and contactors K4 and K5 form a star-delta electrical connection with the motor winding of the air intake fan; The three-phase power supply is electrically connected to the electric heater through contactor K6 in turn.

9. The locomotive air conditioning detection device according to claim 8, characterized in that: The six contactor trigger signal output terminals of the main control unit (1) are electrically connected to the contactor trigger signal input terminals of the coils of contactors K1 to K6 respectively; The switch state information output terminals of the normally closed contacts of contactors K1 to K6 are electrically connected to the six contactor switch state information input terminals of the main control unit (1); The contactor switch state display signal output terminal of the main control unit (1) is electrically connected to the contactor switch state display signal input terminal of the touch display unit (3).

10. The locomotive air conditioning detection device according to claim 6, 7 or 9, characterized in that: Also includes a temperature measuring unit (4); The temperature measuring unit (4) is capable of obtaining the air outlet temperature of the locomotive air conditioner, and the air outlet temperature output end of the temperature measuring unit (4) is electrically connected to the air outlet temperature input end of the main control unit (1); The air outlet temperature display signal output terminal of the main control unit (1) is electrically connected to the air outlet temperature display signal input terminal of the touch display unit (3).

Images