Multi-working-condition sand wind test system and method for active air suction type products

Abstract

The invention discloses a multi-working-condition wind sand test system and method for active air suction products, and belongs to the technical field of environment simulation tests. The system comprises a test chamber; the spraying direction of the dust generating system faces the air suction surface of the mechanical and electrical product; the monitoring system at least comprises a dust concentration sensor; and the closed-loop control system is respectively connected with the monitoring system and the dust generating system and is used for dynamically adjusting the output of the dust generating system according to the real-time concentration feedback, so that the dust concentration is maintained in a preset range. The method comprises the following steps: installing a product to enable an air suction surface to face the dust generating system; starting a dust generating system to spray dust; the product is started to actively suck air; the concentration is dynamically adjusted and maintained to be stable through a closed-loop control system; and monitoring product state parameters in the test process and evaluating performance. The coupling working condition that the product actively sucks dust-containing airflow is truly simulated, multi-parameter accurate cooperative control is achieved, simulation authenticity and test reliability are improved, and the device and method are suitable for wind and sand prevention performance testing of active air suction type products.

Description

Technical Field

[0001] This invention relates to the field of environmental simulation testing technology, and more specifically, to a multi-condition wind and sand test system for active air intake products and a test method using the system. Background Technology

[0002] With the development of industrial technology, various active air intake electromechanical products that need to work outdoors or in dusty environments (such as air conditioner outdoor units, vehicle radiators, outdoor communication cabinet fans, air purifiers, etc.) are becoming increasingly common. These products actively draw in ambient air during operation. If the air contains dust, the dust will be sucked into the product, causing filter clogging, reduced heat dissipation efficiency, wear and tear on moving parts, and even circuit failures, seriously affecting the product's performance, reliability, and service life.

[0003] To assess and verify the adaptability of such products in aeolian sandstorm environments, some aeolian sandstorm testing equipment and methods already exist. However, most existing aeolian sandstorm testing systems are designed for static products or only simulate the environment of natural dust settling, failing to realistically reproduce the dynamic coupling process of active suction products "actively drawing in" dust-laden airflow. Furthermore, existing systems typically can only control a single dust concentration, making it difficult to simulate the actual environment of multiple coupled operating conditions such as wind speed and temperature. Moreover, the control accuracy and response speed of dust concentration are poor, failing to meet the requirements for refined and standardized testing. Therefore, there is an urgent need for a testing system and method that can more realistically and accurately simulate the actual working environment of active suction products. Summary of the Invention

[0004] The present invention aims to solve at least one of the above-mentioned problems in the prior art, and provides a multi-condition wind and sand test system and method that can realistically simulate the working conditions of active air suction products and realize precise collaborative control of multiple parameters.

[0005] To achieve the above objectives, a first aspect of the present invention provides a multi-condition wind and sand test system for actively suction products, comprising: The test chamber is used to house active suction electromechanical products to be tested. A dust-generating system, whose spray direction is configured to face the suction surface of the electromechanical product, is used to spray sand and dust into the test chamber to simulate a dusty airflow environment; The monitoring system includes at least a dust concentration sensor for real-time monitoring of dust concentration in the test chamber; and a closed-loop control system connected to the monitoring system and the dust generation system, respectively, for dynamically adjusting the output of the dust generation system based on the real-time concentration data fed back by the dust concentration sensor, so that the dust concentration in the test chamber is maintained within a preset target concentration range.

[0006] Furthermore, the dust generation system adopts a modular architecture, including: Storage silos are used for graded storage of sand and dust raw materials of different particle sizes; A mixing agitator, connected to the storage silo, is used to mix sand and dust of different particle sizes evenly. A diversion pipe is connected to the mixing agitator to evenly distribute the uniformly mixed sand and dust to multiple output branches; and multiple sets of spray nozzles are connected to the multiple output branches of the diversion pipe to spray sand and dust into the test chamber, and the spray angle of the nozzles is adjustable.

[0007] Furthermore, the monitoring system also includes a wind speed sensor and a temperature sensor; the closed-loop control system is also used to synchronously adjust the injection pressure of the dust generation system and the auxiliary temperature control equipment in the test chamber based on the feedback from the wind speed sensor and the temperature sensor, so as to achieve multi-parameter coordinated closed-loop control of dust concentration, wind speed and temperature.

[0008] Furthermore, the system also includes a dust collection system, which comprises: A dust collection trough is located at the bottom of the test chamber; A dust collection box; and a negative pressure dust suction pipe, connecting the dust collection tank and the dust collection box, for sucking sand and dust in the test chamber into the dust collection box.

[0009] A second aspect of the present invention provides a multi-condition wind and sand test method based on the system described in any of the above technical solutions, comprising the following steps: Step S1: Install the active suction electromechanical product to be tested in the test chamber, and make the suction surface of the electromechanical product face the spray direction of the dust generation system; Step S2: Start the dust generation system and spray sand and dust onto the suction surface of the electromechanical product; Step S3: Start the electromechanical product and put it into active suction operation mode; Step S4: During the operation of the electromechanical product, the output of the dust generation system is dynamically adjusted according to the real-time monitoring of dust concentration feedback through the closed-loop control system, so that the dust concentration in the test chamber is stabilized at the preset target value, so as to simulate the coupled working condition of the product actively inhaling dust-laden airflow. Step S5: Monitor the operating status parameters of the electromechanical products during the test, and evaluate their wind and sand protection performance accordingly.

[0010] Furthermore, before step S1, the method further includes: based on the analysis results of wind and sand samples from the target application area, pre-setting the operating parameters of the test, wherein the operating parameters include at least the target dust particle size distribution, target concentration, and target wind speed.

[0011] Furthermore, step S1 also includes: after installing the electromechanical product to be tested, performing an initial performance test on the electromechanical product and recording its initial performance data before it is affected by sand and dust.

[0012] Furthermore, the operating status parameters monitored in step S5 include at least one of the following: suction resistance, operating current, input power, and air volume change, as well as the filter screen sand accumulation pattern recorded through the observation window.

[0013] Furthermore, step S5 is followed by step S6: stopping the dust generation system, continuing to operate the electromechanical product and / or the dust collection system to clean the dust in the cabin, then retesting the performance of the electromechanical product after the test, and comparing and analyzing the retest results with the initial performance data and the dynamic parameters during the test.

[0014] Furthermore, in step S4, the dynamic adjustment of the closed-loop control system is also based on real-time monitoring of wind speed and temperature feedback, and synchronously adjusts the injection pressure of the dust generation system and the auxiliary temperature control equipment in the test chamber to achieve multi-parameter coordinated control of dust concentration, wind speed and temperature.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Realistic simulation: By directing the dust generation direction directly towards the product's suction surface and combining it with the product's own active suction, the test results realistically simulate the product's active intake of dust-laden airflow in a real environment, making the test results more valuable for reference.

[0016] 2. Precise control: The closed-loop control system dynamically adjusts the dust generation based on the real-time monitoring of dust concentration, which can accurately and stably maintain the dust concentration in the chamber within the preset range, thus improving the accuracy and repeatability of the test.

[0017] 3. Multi-condition simulation: By integrating wind speed and temperature sensors and coordinating their control, it can simulate complex environments with multiple coupled parameters such as wind speed, temperature, and dust concentration, meeting diverse testing needs.

[0018] 4. Modular design: The modular design of the dust generation system (graded storage, mixing, diversion, and multiple nozzles) makes the dust ratio flexible and controllable, the spray uniform, and can adapt to products of different sizes and test spaces.

[0019] 5. Automation and Efficiency: The entire testing process is highly automated, reducing the burden of manual operation. The dust collection system facilitates post-test cleanup and improves testing efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the distribution of the multi-condition wind and sand test system in an embodiment of the present invention; Figure 2 This is a schematic diagram of the modular structure of the dust generation system in an embodiment of the present invention; Figure 3 This is a flowchart of the multi-condition wind and sand test method in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached drawings: 1-Test chamber, 2-Dust generation system, 21-Storage silo, 22-Mixer, 23-Diversion pipe, 24-Spray nozzle, 3-Monitoring system, 31-Dust concentration sensor, 32-Wind speed sensor, 33-Temperature sensor, 4-Closed-loop control system, 5-Dust collection system, 51-Dust collection trough, 52-Dust collection box, 53-Negative pressure suction pipe, 6-Electromechanical product under test, 7-Auxiliary temperature control equipment. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] Example 1 like Figure 1 As shown, this embodiment provides a multi-condition sandstorm testing system for active air suction products. The system mainly includes: a test chamber 1, a dust generation system 2, a monitoring system 3, and a closed-loop control system 4.

[0024] Test chamber 1 is a closed or semi-closed space used to house the active air intake electromechanical product 6 to be tested (e.g., an outdoor unit of an air conditioner in operation). The chamber body may be made of stainless steel or other corrosion-resistant materials and is equipped with operable doors or windows to facilitate product installation and observation. Observation windows may be installed on the chamber walls for observing the accumulation of sand on the product (especially its filter) during the test.

[0025] The dust generation system 2 is used to spray sand and dust into the test chamber 1 to simulate a dusty airflow environment. A key feature is that its spray direction (i.e., the orientation of the nozzles) is configured to face the suction surface of the electromechanical product 6. In this way, when the product actively draws air, it will face the oncoming dusty airflow, simulating the actual working scenario to the greatest extent. The dust generation system 2 can be composed of components such as an air compressor, a dust storage tank, a feeder, and nozzles.

[0026] The monitoring system 3 includes at least a dust concentration sensor 31. The dust concentration sensor 31 is installed at a suitable location in the test chamber 1 (such as near the product's air intake surface) to monitor the dust concentration in the chamber in real time and convert the concentration data into an electrical signal.

[0027] The closed-loop control system 4 is the core of this invention. It is connected to the monitoring system 3 (receiving signals) and the dust generation system 2 (sending commands). Its working principle is as follows: it receives real-time concentration data from the dust concentration sensor 31, compares this data with a preset target concentration range, and if the actual concentration is lower than the target value, it controls the dust generation system 2 to increase the injection volume (e.g., increase the feeding rate or injection pressure); if the actual concentration is higher than the target value, it decreases the injection volume. Through this dynamic and continuous adjustment, the dust concentration in the test chamber 1 is kept stable within the preset target concentration range. The closed-loop control system 4 may include a programmable logic controller (PLC), an industrial computer or embedded system, and corresponding control software and interface.

[0028] Example 2 This embodiment further optimizes the dust generation system 2 based on Embodiment 1. For example... Figure 2 As shown, the dust generation system 2 adopts a modular architecture, specifically including: Storage bin 21: Used for graded storage of sand and dust raw materials with different particle sizes. For example, multiple independent bins can be set up to store coarse sand, medium sand, fine sand and dust respectively to meet the test requirements of different particle size distributions.

[0029] Mixing agitator 22: Connected to each storage silo 21. Before or during the test, materials are taken from each storage silo 21 according to the preset particle size ratio, and the mixing agitator 22 mixes them thoroughly and evenly to simulate the wind and sand composition of a specific region.

[0030] Diversion pipe 23: Connected to the outlet of the mixer 22. It evenly distributes the uniformly mixed sand and dust airflow to multiple output branches to ensure the uniformity of large-area spraying.

[0031] Multiple sets of spray nozzles 24 are connected to multiple output branches of the diversion pipe 23. These nozzles 24 are installed inside the test chamber 1, facing the electromechanical product 6 under test. The spray angle of each nozzle 24 is adjustable, and the arrangement and adjustment can be optimized according to the size, shape and suction surface position of the electromechanical product 6 under test to ensure that sand and dust can evenly cover the entire suction surface.

[0032] Example 3 This embodiment, based on Embodiment 1 or 2, further expands the system's multi-condition simulation capabilities. For example... Figure 1As shown, the monitoring system 3 also includes a wind speed sensor 32 and a temperature sensor 33. Correspondingly, the functionality of the closed-loop control system 4 is also enhanced. It can not only control the dust-generating system 2 based on dust concentration, but also synchronously adjust other equipment based on feedback from the wind speed sensor 32 and the temperature sensor 33. For example, it can adjust the injection pressure of the dust-generating system 2 to change the injection speed, thereby affecting the wind speed inside the chamber; simultaneously, it can also control auxiliary temperature control equipment 7 (such as heaters, coolers, humidifiers / dehumidifiers, etc.) inside the test chamber 1 or on the air inlet duct to regulate the temperature inside the chamber. In this way, the system achieves multi-parameter coordinated closed-loop control of the three key parameters—dust concentration, wind speed, and temperature—enabling a more realistic simulation of sandstorm environments under various complex climatic conditions.

[0033] Example 4 To avoid harm to the environment and operators from sand and dust, and to facilitate repeated testing, this embodiment adds a sand and dust collection system 5 to any of the above embodiments. For example... Figure 1 As shown, the dust collection system 5 includes a dust collection trough 51, a dust collection box 52, and a negative pressure suction pipe 53. The dust collection trough 51 is located at the bottom of the test chamber 1 and is used to collect dust that settles naturally or is guided by airflow. One end of the negative pressure suction pipe 53 is connected to the dust collection trough 51, and the other end is connected to the dust collection box 52. By generating negative pressure in the pipe using equipment such as a fan, the dust in the dust collection trough 51 can be sucked into the dust collection box 52 for centralized collection and treatment.

[0034] Example 5 This embodiment provides a method for conducting multi-condition wind and sand tests using the system described in any of the foregoing embodiments. For example... Figure 3 As shown, the method includes the following steps: Step S1: Product Installation and Initial Testing. Install the active suction electromechanical product 6 (e.g., a cooling fan) to be tested in the designated position within the test chamber 1, adjusting its suction surface to face the spray direction of the dust generation system 2. With the product not activated and the chamber clean, conduct initial performance tests and record initial performance data, such as initial airflow, input power, operating current, and suction resistance, as a benchmark for subsequent comparisons.

[0035] Step S2: Start the dust generation system. According to the preset test conditions (e.g., target dust concentration of 100mg / m³, target wind speed of 5m / s, target temperature of 40℃), start the dust generation system 2 and begin spraying the mixed dust onto the suction surface of the electromechanical product 6 under test.

[0036] Step S3: Start the electromechanical product under test 6 and put it into normal active suction operation state.

[0037] Step S4: Closed-loop control and operating condition maintenance. During product operation, the closed-loop control system 4 dynamically and continuously adjusts the output of the dust generation system 2 (as well as the injection pressure and auxiliary temperature control equipment 7) based on the real-time dust concentration (and other parameters such as wind speed and temperature) fed back by the monitoring system 3, ensuring that the actual dust concentration, wind speed, and temperature inside the chamber remain stable near the preset target values. This process simulates the coupled operating condition of the product actively and continuously inhaling dust-laden airflow in a real environment.

[0038] Step S5: Performance Monitoring and Evaluation. Throughout the entire test (which can last for several hours or even days), continuously monitor and record various operating parameters of the electromechanical product under test 6, such as the rise curve of suction resistance, changes in operating current or input power, and the decrease in output airflow. Simultaneously, the morphology of sand accumulation on the product's filter screen can be recorded or photographed periodically through the observation window. By monitoring and analyzing these dynamic parameters, the performance degradation pattern and tolerance of the product in a sandstorm environment can be evaluated.

[0039] Step S6: End of Test and Retest. Once the test has reached the predetermined time or the product performance has decreased to a certain threshold, the dust generation system 2 is stopped first. The electromechanical product under test 6 continues to run and / or the sand and dust collection system 5 is activated to clean the remaining suspended and settled sand and dust in the test chamber 1. After the chamber is clean, the performance of the electromechanical product under test 6 is retested, and its final performance data is recorded. Finally, the retest results are compared with the initial performance data in Step S1, and combined with the changes in dynamic parameters during the test, a final comprehensive evaluation of the product's overall wind and sand protection performance is made.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications, equivalent substitutions, and improvements to the above embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A multi-condition wind and sand test system for active air suction products, characterized in that, include: Test chamber (1), used to house the active suction electromechanical products to be tested; The dust generation system (2), whose spray direction is configured to face the suction surface of the electromechanical product, is used to spray sand and dust into the test chamber (1) to simulate a dusty airflow environment; The monitoring system (3) includes at least a dust concentration sensor (31) for real-time monitoring of the dust concentration in the test chamber (1); and a closed-loop control system (4) connected to the monitoring system (3) and the dust generation system (2) respectively, for dynamically adjusting the output of the dust generation system (2) based on the real-time concentration data fed back by the dust concentration sensor (31), so that the dust concentration in the test chamber (1) is maintained within a preset target concentration range.

2. The multi-condition wind and sand test system for active air suction products according to claim 1, characterized in that, The dust generation system (2) adopts a modular architecture, including: Storage bin (21) is used for graded storage of sand and dust raw materials of different particle sizes; A mixing agitator (22) is connected to the storage bin (21) and is used to mix sand and dust of different particle sizes evenly. A diversion pipe (23) is connected to the mixing agitator (22) for uniformly diverting the mixed sand and dust to multiple output branches; and multiple sets of spray nozzles (24) are connected to multiple output branches of the diversion pipe (23) for spraying sand and dust into the test chamber (1), and the spray angle of the nozzles is adjustable.

3. The multi-condition wind and sand test system for active air suction products according to claim 1 or 2, characterized in that, The monitoring system (3) also includes a wind speed sensor (32) and a temperature sensor (33); the closed-loop control system (4) is also used to synchronously adjust the injection pressure of the dust generation system (2) and the auxiliary temperature control device (7) in the test chamber (1) based on the feedback from the wind speed sensor (32) and the temperature sensor (33) to achieve multi-parameter coordinated closed-loop control of dust concentration, wind speed and temperature.

4. The multi-condition wind and sand test system for active air suction products according to claim 1, characterized in that, It also includes a dust collection system (5), which comprises: A dust collection trough (51) is located at the bottom of the test chamber (1); A dust collection box (52) and a negative pressure dust suction pipe (53) are provided, which connect the dust collection tank (51) and the dust collection box (52) to suck the sand and dust in the test chamber (1) into the dust collection box (52).

5. A multi-condition wind and sand test method for actively suction products based on any one of claims 1 to 4, characterized in that, Includes the following steps: Step S1: Install the active suction electromechanical product to be tested in the test chamber (1) and make the suction surface of the electromechanical product face the spray direction of the dust generation system (2); Step S2: Start the dust generation system (2) and spray sand and dust onto the suction surface of the electromechanical product; Step S3: Start the electromechanical product and put it into active suction operation mode; Step S4: During the operation of the electromechanical product, the output of the dust generation system (2) is dynamically adjusted by the closed-loop control system (4) based on the real-time monitoring of dust concentration feedback, so that the dust concentration in the test chamber (1) is stabilized at the preset target value, so as to simulate the coupled working condition of the product actively inhaling dust-laden airflow. Step S5: Monitor the operating status parameters of the electromechanical products during the test, and evaluate their wind and sand protection performance accordingly.

6. The multi-condition wind and sand test method according to claim 5, characterized in that, Before step S1, the method further includes: based on the analysis results of wind and sand samples from the target application area, pre-setting the operating parameters of the test, wherein the operating parameters include at least the target dust particle size distribution, target concentration, and target wind speed.

7. The multi-condition wind and sand test method according to claim 5, characterized in that, Step S1 also includes: after installing the electromechanical product to be tested (6), performing an initial performance test on the electromechanical product and recording its initial performance data before it is affected by sand and dust.

8. The multi-condition wind and sand test method according to claim 5, characterized in that, The operating status parameters monitored in step S5 include at least one of the following: suction resistance, operating current, input power, and air volume change, as well as the filter screen sand accumulation pattern recorded through the observation window.

9. The multi-condition wind and sand test method according to claim 7, characterized in that, Step S5 is followed by step S6: stop the dust generation system (2), continue to run the electromechanical product and / or the sand and dust collection system (5) to clean the sand and dust in the cabin, and then retest the performance of the electromechanical product after the test, and compare and analyze the retest results with the initial performance data and the dynamic parameters during the test.

10. The multi-condition wind and sand test method according to claim 5, characterized in that, In step S4, the dynamic adjustment of the closed-loop control system (4) is also based on real-time monitoring of wind speed and temperature feedback, and synchronously adjusts the injection pressure of the dust generation system (2) and the auxiliary temperature control equipment (7) in the test chamber (1) to achieve multi-parameter coordinated control of dust concentration, wind speed and temperature.

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