Cross-flow fan testing apparatus

Abstract

The utility model discloses a crossflow fan testing equipment, including test case, test component, be equipped with power source interface, product interface respectively on test case, and power source interface is used to connect external power supply, and product interface is used to connect product. Test component sets up on test case, and it includes test power, oscillograph, single -phase multifunction table, signal generator. Among them, test power is connected with power source interface, oscillograph, single -phase multifunction table, signal generator are in parallel and are set up, and the both ends of oscillograph, single -phase multifunction table, signal generator are connected in series with test power, product interface respectively to form test circuit. The utility model has realized the comprehensive test to crossflow fan multiple performance, and has promoted the test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of performance testing technology, and in particular to a cross-flow fan testing device. Background Technology

[0002] Cross-flow fans are mainly used for heat dissipation in electronic equipment, dry-type transformers, photocopiers, projectors, temperature and humidity control machinery, and heating and cooling room equipment. Due to their wide application and the high temperatures encountered during installation and use, maintenance is relatively complex. To ensure safety, cross-flow fans, compared to traditional fans, must also possess multiple functions such as over-temperature protection, light and heavy load protection, and speed regulation. This necessitates that, at the factory, cross-flow fans not only meet basic performance requirements but also undergo testing at different speeds for current, power, and output pulses to ensure that over-temperature protection, light and heavy load protection, and speed regulation functions meet requirements. Therefore, it is necessary to design a comprehensive testing device. Utility Model Content

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a cross-flow fan testing device that can comprehensively test multiple performance aspects of the cross-flow fan and improve testing efficiency.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a cross-flow fan testing device, comprising...

[0005] The test chassis is equipped with a power interface and a product interface. The power interface is used to connect an external power supply, and the product interface is used to connect a product.

[0006] The test assembly, mounted on the test chassis, includes a test power supply, an oscilloscope, a single-phase multifunction meter, and a signal generator; wherein the test power supply is connected to the power interface; the oscilloscope, single-phase multifunction meter, and signal generator are connected in parallel, and the two ends of the oscilloscope, single-phase multifunction meter, and signal generator are respectively connected in series with the test power supply and the product interface to form a test circuit.

[0007] The beneficial effects of this utility model's cross-flow fan testing equipment are as follows:

[0008] In use, connect the power interface to an external power supply and connect the cross-flow fan to be tested to the product interface to start the test assembly for simultaneous testing of multiple performance characteristics of the cross-flow fan. The test assembly integrates an oscilloscope, a single-phase multimeter, and a signal generator in the test chassis. These components are connected via wiring to simultaneously test multiple performance characteristics of the cross-flow fan, avoiding the problems of long testing times and high labor intensity caused by separate wiring tests for each instrument, thus effectively improving testing efficiency. Specifically, the signal generator is used to adjust the speed of the cross-flow fan, the single-phase multimeter is used to detect the current and power of the cross-flow fan at different speeds, and the oscilloscope is used to detect the output voltage and pulse frequency of the cross-flow fan. Connecting the test power supply to the external power supply provides power to the oscilloscope, single-phase multimeter, and signal generator respectively, ensuring their normal operation.

[0009] Furthermore, the signal generator includes electrically connected PWM duty cycle transmitters and a rotary switch; multiple PWM duty cycle transmitters are provided, and the rotary switch has start positions corresponding to each of the multiple duty cycle transmitters. The coordination between the multiple PWM duty cycle transmitters and the multiple start positions of the rotary switch achieves the speed regulation requirement of the cross-flow fan, facilitating the testing of the cross-flow fan's performance at different speeds using a unidirectional multifunction meter and oscilloscope.

[0010] Furthermore, the 5Hz duty cycles of the multiple PWM duty cycle transmitters are 5%, 30%, 55%, and 65%, respectively. Typically, the frequency range of the PWM duty cycle transmitters is 1Hz to 150Hz, with an accuracy of 1%; the duty cycle range is 0 to 100%. By limiting the duty cycles of the multiple PWM duty cycle transmitters, the rotational speed of the cross-flow fan, adjusted by the signal generator, can reach the required test speed.

[0011] Furthermore, it also includes a speedometer, which is connected in parallel to the test circuit containing the single-phase multifunction meter and the test power supply. The real-time rotational speed of the cross-flow fan can be obtained through the settings of the speedometer.

[0012] Furthermore, the test chassis is equipped with a power switch for controlling the power interface channel to turn the test equipment on and off.

[0013] Furthermore, the power switch is connected in series between the power interface and the test power supply, and the test power supply is equipped with electrode connection terminals corresponding one-to-one with the oscilloscope, single-phase multimeter, and signal generator, so as to provide independent power to the oscilloscope, single-phase multimeter, and signal generator.

[0014] Furthermore, the test chassis includes upper and lower test covers and mounting bases, which define a receiving cavity. The test covers have mounting slots corresponding to the oscilloscope, single-phase multimeter, and signal generator, and these slots communicate with the receiving cavity. The receiving cavity houses the test power supply, oscilloscope, single-phase multimeter, and signal generator, ensuring the neatness of the test equipment. The mounting slots expose the display surfaces of the oscilloscope, single-phase multimeter, and signal generator on the test chassis for easy monitoring of the test results.

[0015] Furthermore, the accommodating cavity is provided with a mounting plate fixed to the mounting base, and the test power supply is mounted on the mounting plate, with a gap between the mounting plate and the mounting base. The mounting plate is designed to elevate the test power supply to meet heat dissipation requirements.

[0016] Furthermore, the bottom of the mounting liner is provided with a positioning groove, and the mounting base is provided with a positioning post corresponding to the positioning groove.

[0017] Furthermore, the power interface and product interface are located on the test cover plate, and each of the power interface and product interface is connected to a conduit. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-flow fan testing equipment during testing, as described in an embodiment of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the cross-flow fan testing equipment according to an embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional view of the mounting base in an embodiment of the present invention;

[0021] Figure 4 This is a circuit diagram of the test component in an embodiment of this utility model.

[0022] In the picture:

[0023] 1-Test chassis; 11-Power interface; 12-Product interface; 13-Test cover; 14-Mounting base; 141-Positioning post; 15-Mounting liner; 2-External power supply; 3-Test power supply; 31-Electrode connection terminal; 4-Oscilloscope; 5-Single-phase multifunction meter; 6-Signal generator; 61-PWM duty cycle transmitter; 62-Rotary switch; 7-Cross-flow fan; 8-Tachometer; 9-Power switch. Detailed Implementation

[0024] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0025] Example

[0026] See appendix Figure 1-4 As shown, this utility model discloses a cross-flow fan testing device, including a test chassis 1 and a test assembly. The test chassis 1 is equipped with a power interface 11 and a product interface 12. The power interface 11 is used to connect to an external power supply 2, and the product interface 12 is used to connect to a product. The test assembly is mounted on the test chassis 1 and includes a test power supply 3, an oscilloscope 4, a single-phase multifunction meter 5, and a signal generator 6. The test power supply 3 is connected to the power interface 11. The oscilloscope 4, the single-phase multifunction meter 5, and the signal generator 6 are connected in parallel, and their two ends are connected in series with the test power supply 3 and the product interface 12, respectively, to form a test circuit.

[0027] In use, connect the power interface 11 to the external power supply 2 and connect the cross-flow fan 7 to be tested to the product interface 12 to start the test assembly to simultaneously test multiple performance parameters of the cross-flow fan 7. Among them, the signal generator 6 is used to adjust the speed of the cross-flow fan 7, the single-phase multi-function meter 5 is used to detect the current and power of the cross-flow fan 7 at different speeds, and the oscilloscope 4 is used to detect the output voltage and pulse frequency of the cross-flow fan 7.

[0028] To meet speed regulation requirements, signal generator 6 can employ either PWM duty cycle mode or PULSE pulse mode. For example, signal generator 6 includes electrically connected PWM duty cycle transmitters 61 and rotary switch 62. Multiple PWM duty cycle transmitters 61 are provided, and rotary switch 62 has start positions corresponding to each transmitter. The coordination between the multiple PWM duty cycle transmitters 61 and the multiple start positions of rotary switch 62 achieves speed regulation of the cross-flow fan 7, facilitating testing of the performance of the cross-flow fan 7 at different speeds using a unidirectional multifunction meter 5 and an oscilloscope 4.

[0029] The PWM duty cycle transmitter 61 used in this embodiment has a wide voltage input of 3.3~30V with reverse connection protection, a frequency range of 1Hz~150Hz, and an accuracy of 1%; the duty cycle range is 0~100%. During testing, the 5Hz duty cycles of multiple PWM duty cycle transmitters are set to 5%, 30%, 55%, and 65% respectively to ensure that the adjusted cross-flow fan 7 reaches the required test speed. Furthermore, the rotary switch 62 is equipped with digital labels corresponding to the start positions. The start position corresponding to label 1 is connected to the 5% duty cycle PWM duty cycle transmitter; the start position corresponding to label 2 is connected to the 30% duty cycle PWM duty cycle transmitter; the start position corresponding to label 3 is connected to the 55% duty cycle PWM duty cycle transmitter; and the start position corresponding to label 4 is connected to the 65% duty cycle PWM duty cycle transmitter.

[0030] To determine the real-time rotational speed of the cross-flow fan, in some embodiments, see the appendix. Figure 4 As shown, the testing equipment also includes a speedometer 8. In use, the speedometer 8 is connected in parallel to the test circuit containing the single-phase multifunction meter 5 and the test power supply 3. When the testing equipment and the cross-flow fan 7 are started, the speedometer 8 can display the real-time rotational speed of the cross-flow fan 7. For example, the speedometer 8 can be a digital flash speedometer.

[0031] In some embodiments, the oscilloscope 4 is a three-in-one oscilloscope with a negative voltage measurement range of 0~400V and a vertical sensitivity of 1 (10mV~10V).

[0032] The parameters for the single-phase multifunction meter 5 are as follows: voltage test range 60~300V, current test range 0~20A, test power range 0~999KW, frequency 40~65Hz, and test accuracy class 0.5; RS485 communication interface, simultaneously supporting ModbuS-RTU and DL / T645-2007 dual protocol baud rates of 1200, 2400, 4800, 9600, and 19200 selectable.

[0033] In some embodiments, the test chassis 1 is provided with a power switch 9 for controlling the power interface 11 channel to turn the test equipment on and off. The power switch 9 is connected in series between the power interface 11 and the test power supply 3, and the test power supply 3 is provided with electrode connection terminals 31 corresponding to the oscilloscope 4, the single-phase multifunction meter 5, and the signal generator 6. The electrode connection terminals 31 are provided to provide independent power to the oscilloscope 4, the single-phase multifunction meter 5, and the signal generator 6.

[0034] In some embodiments, see Appendix Figure 2-3As shown, the test chassis 1 includes a test cover plate 13 and a mounting base 14 arranged vertically. The test cover plate 13 and the mounting base 14 define a receiving cavity. The test cover plate 13 has mounting slots corresponding to the oscilloscope 4, single-phase multimeter 5, signal generator 6, and power switch 9, and the mounting slots communicate with the receiving cavity. The receiving cavity houses the test power supply 3, oscilloscope 4, single-phase multimeter 5, and signal generator 6 to ensure the neatness of the test equipment. The mounting slots allow the display surfaces of the oscilloscope 4, single-phase multimeter 5, and signal generator 6 to be exposed on the test chassis 1 for easy viewing of the test results.

[0035] Furthermore, the accommodating cavity is provided with a mounting plate 15 fixed to the mounting base 14, and the test power supply 3 is mounted on the mounting plate 15, with a gap between the mounting plate 15 and the mounting base 14. The mounting plate 15 is designed to raise the test power supply 3 to meet the heat dissipation requirements.

[0036] Furthermore, the bottom of the mounting plate 15 is provided with a positioning groove, and the mounting base 14 is provided with a positioning post 141 corresponding to the positioning groove.

[0037] In some embodiments, the power interface 11 and the product interface 12 are provided on the test cover plate 13, and the power interface 11 and the product interface 12 are respectively connected to conduits, which enable connection to the external power supply 2 or the cross-flow fan 7.

[0038] The testing process in this embodiment is as follows:

[0039] Prepare the cross-flow fan 7 to be tested and connect it to the product interface 12; connect the power interface 11 to the external power supply 2 and turn on the power switch 9 to connect the power; adjust the four PWM duty cycle transmitters 61 to 5Hz duty cycle 5%, 5Hz duty cycle 30%, 5Hz duty cycle 55%, and 5Hz duty cycle 65% respectively; turn on the oscilloscope 4; turn the rotary switch 62 to position 1, the cross-flow fan 7 will stop running, check the corresponding waveform on the oscilloscope 4 and the corresponding parameters on the unidirectional multifunction meter 5; turn the rotary switch 62 to position 1. Turn the rotary switch 62 to position 2. The cross-flow fan 7 starts running. Check the corresponding waveform on the oscilloscope 4 and the corresponding parameters on the one-way multifunction meter 5, and read the reading on the tachometer 8. Turn the rotary switch 62 to position 3. The cross-flow fan 7 starts running again. Check the corresponding waveform on the oscilloscope 4 and the corresponding parameters on the one-way multifunction meter 5, and read the reading on the tachometer 8. Turn the rotary switch 62 to position 4 again. After 30 seconds, the cross-flow fan 7 will reduce its speed to 2080 rpm and start running. Check that the oscilloscope 4 has no waveform output. Check the corresponding parameters on the one-phase multifunction meter 5. Disconnect the connecting pipe between the cross-flow fan 7 and the test equipment. All tests are now complete. The test results are shown in Table 1.

[0040] Table 1 Test Results of Crossflow Fan

[0041]

[0042] After testing, qualified products are moved to the next process according to the corresponding SOP testing requirements, while defective products are sent to the analysis and repair station.

[0043] The cross-flow fan testing equipment in this embodiment can perform a comprehensive check on the speed regulation function and output alarm function of the cross-flow fan to ensure that the current, power, speed and other indicators of the cross-flow fan meet the test requirements and improve the application reliability of the cross-flow fan.

[0044] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A cross-flow fan testing device, characterized in that: include The test chassis is equipped with a power interface and a product interface. The power interface is used to connect an external power supply, and the product interface is used to connect a product. The test assembly, mounted on the test chassis, includes a test power supply, an oscilloscope, a single-phase multifunction meter, and a signal generator; wherein the test power supply is connected to the power interface; the oscilloscope, single-phase multifunction meter, and signal generator are connected in parallel, and the two ends of the oscilloscope, single-phase multifunction meter, and signal generator are respectively connected in series with the test power supply and the product interface to form a test circuit.

2. The cross-flow fan testing equipment according to claim 1, characterized in that: The signal generator includes an electrically connected PWM duty cycle transmitter and a rotary switch; multiple PWM duty cycle transmitters are provided, and the rotary switch has start positions that correspond one-to-one with the multiple duty cycle transmitters.

3. The cross-flow fan testing equipment according to claim 2, characterized in that: The 5Hz duty cycles of the various PWM duty cycle transmitters are 5%, 30%, 55%, and 65%, respectively.

4. The cross-flow fan testing equipment according to claim 1, characterized in that: It also includes a speed measuring instrument, which is connected in parallel to the test circuit containing the single-phase multifunction meter and the test power supply.

5. The cross-flow fan testing equipment according to claim 1, characterized in that: The test chassis is equipped with a power switch for controlling the power interface channel.

6. The cross-flow fan testing equipment according to claim 5, characterized in that: The power switch is connected in series between the power interface and the test power supply, and the test power supply is provided with electrode connection terminals that correspond one-to-one with the oscilloscope, single-phase multifunction meter, and signal generator.

7. The cross-flow fan testing equipment according to claim 1, characterized in that: The test chassis includes a test cover plate and a mounting base arranged on the top and bottom. The test cover plate and the mounting base define a cavity. The test cover plate has mounting slots that correspond one-to-one with the oscilloscope, single-phase multifunction meter and signal generator. The mounting slots are connected to the cavity.

8. The cross-flow fan testing equipment according to claim 7, characterized in that: The accommodating cavity is provided with a mounting liner fixed to the mounting base, and the test power supply is mounted on the mounting liner, with a gap between the mounting liner and the mounting base.

9. The cross-flow fan testing equipment according to claim 8, characterized in that: The bottom of the mounting liner is provided with a positioning groove, and the mounting base is provided with a positioning post corresponding to the positioning groove.

10. The cross-flow fan testing equipment according to claim 7, characterized in that: The power interface and product interface are located on the test cover plate, and each of the power interface and product interface is connected to a conduit.

Images