A fan brushless motor waterproof testing device

Abstract

The application relates to a waterproof testing device for a fan brushless motor. The device solves the problems of unreasonable structure, inaccurate testing structure, easy damage of the fan and low testing efficiency in the prior art. The device comprises a connecting pipeline, a center pipeline and a controller. The connecting pipeline comprises a plurality of air inlet connecting pipes connected with air inlets of the fan and a plurality of air outlet connecting pipes connected with air outlets of the fan. The air inlet connecting pipes are connected through lower connecting pipes, and the air outlet connecting pipes are connected through upper connecting pipes. The center pipeline is connected between the upper connecting pipes and the lower connecting pipes. Heating and cooling mechanisms are arranged outside the center pipeline. The controller is connected with the heating and cooling mechanisms and the fan. The application accurately simulates extreme climate conditions of the fan, so that the testing is closer to the real situation, and the testing result is more accurate. The connecting pipeline can connect multiple fans, and multiple fans can be tested at a time, so that the testing efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to a waterproof testing device for a brushless fan motor. Background Technology

[0002] Fans are widely used in various fields, and some may operate in harsh environments affected by moisture, thus requiring a certain degree of waterproofing. Before production, fans undergo waterproofing tests by the manufacturer. However, current waterproofing testing devices cannot accurately simulate harsh external environments, resulting in inaccurate results. Furthermore, the structure of existing waterproofing testing devices is not ideal; using a water pump to pump water into the fan can cause damage due to the water jet. Additionally, the testing device can only test one fan at a time, leading to low testing efficiency. For example, Chinese invention application No. 202210470729.X, entitled "Fan Waterproofing Testing Device and System," describes a structure including a water container, a testing bracket, and a fan assembly. The testing bracket is installed inside the water container, and the fan assembly is fixed to the testing bracket. The testing bracket has a water inlet and an air inlet, achieving fan waterproofing testing. However, this device suffers from the aforementioned drawbacks, as it can only test one fan at a time, resulting in low testing efficiency. Summary of the Invention

[0003] The present invention mainly addresses the problems of unreasonable test device structure in the prior art, such as inaccurate test structure, easy damage to the fan, and low test efficiency, and provides a waterproof test device for brushless motors of fans.

[0004] The above-mentioned technical problems of the present invention are mainly solved by the following technical solution: a waterproof testing device for a brushless fan motor, comprising,

[0005] The connecting pipes include several inlet connecting pipes that connect to the air inlet of the fan and several outlet connecting pipes that connect to the air outlet of the fan. The inlet connecting pipes are connected to each other through the lower connecting pipes, and the outlet connecting pipes are connected to each other through the upper connecting pipes.

[0006] The central tube is connected between the upper connecting tube and the lower connecting tube, and a heating mechanism and a cooling mechanism are installed on the outside of the central tube;

[0007] The controller collects temperature and humidity information inside the pipeline, controls the heating and cooling mechanisms to keep the temperature within the set range, and controls the brushless motor to reach the set speed.

[0008] This invention is used for waterproof testing of fans equipped with brushless motors, specifically for testing the waterproof performance of brushless motors. During testing, the fans are installed on connecting pipes, which can connect multiple fans at once. The fan inlet connects to an inlet connecting pipe, and the outlet connects to an outlet connecting pipe. The inlet connecting pipe connects to a lower connecting pipe, and the outlet connecting pipe connects to an upper connecting pipe. A central pipe connects the upper and lower connecting pipes, forming a closed-loop system. Water is injected into the lower connecting pipe, and air continuously circulates within the system to simulate extreme climatic conditions for the brushless motor, thereby testing the operating performance of the fan's brushless motor under extreme climatic conditions. A heating mechanism is used to increase the temperature in the pipes, and a cooling mechanism is used to decrease the temperature. A controller receives temperature and humidity information from within the pipes and controls the heating and cooling mechanisms to regulate the temperature and humidity of the air in the central pipe, ensuring that the temperature and humidity fluctuate slightly within a set range to simulate a real external environment. The controller reads the motor speed and adjusts the motor speed to the set speed to achieve the required airflow velocity within the pipes. Only when the required airflow velocity is reached can water be drawn up from the pipes, achieving the required humidity level.

[0009] Before operation, water is injected into the lower connecting pipe until it is half full. The brushless motor is then started to activate the fan. At low speeds, the fan cannot move the water in the lower connecting pipe. Once the set speed is reached, the water in the lower connecting pipe moves upwards with the airflow, passing through the inlet connecting pipe, the fan, the outlet connecting pipe, and the upper connecting pipe before returning to the central pipe and finally entering the lower connecting pipe. After the fan starts running, to simulate a real external environment, the controller regulates the temperature inside the pipe. The heating mechanism maintains the temperature at a set value. When the heating temperature exceeds the set value, the cooling mechanism blows air in to remove heat from the pipe, thus keeping the temperature within the set range.

[0010] As a preferred embodiment, the heating mechanism includes,

[0011] The heating element is connected to the central tube at both ends, forming a single integrated pipe system with the central tube.

[0012] The heater is wrapped around the heating tube and is connected to the controller.

[0013] The heating element is made of aluminum and replaces a section of the central tube. Both ends of the heating element are connected to the central tube, and the heating element and the central tube are connected via a pipe connector. A heater is wrapped around the heating element. Due to the good thermal conductivity of metal, the heater heats the heating element to raise the temperature inside the pipe. The heater is connected to a controller and is controlled by the controller to perform the heating.

[0014] As a preferred embodiment, the cooling mechanism includes,

[0015] The cooling pipe is fitted over the central pipe, forming a cooling channel between the pipe and the central pipe.

[0016] The cooling fan has its outlet connected to the cooling pipe and is connected to the controller.

[0017] The cooling zone pipe is installed outside the central pipe, that is, outside the heating pipe. There is a gap between the cooling pipe and the heating pipe to form a cooling channel for air flow. The cooling fan outlet and the cooling pipe blow low-temperature air into the cooling pipe, which carries away the heat of the heating pipe to reduce the temperature inside the pipe, thereby keeping the temperature inside the entire closed system at a constant value.

[0018] As a preferred option, it also includes,

[0019] A temperature and humidity sensor is provided, with a placement tube installed on the upper connecting pipe corresponding to the connection with the central pipe. The temperature and humidity sensor is installed inside the placement tube and extends into the upper connecting pipe. The temperature and humidity sensor is connected to the controller. In this design, a placement tube is connected to the upper connecting pipe, positioned corresponding to the connection with the central pipe. The placement tube is isolated from the upper connecting pipe. The temperature and humidity sensor is installed inside the placement tube, with the sensor's detection end extending into the upper connecting pipe. The temperature and humidity sensor is used to detect the temperature and humidity inside the pipeline.

[0020] As a preferred option, it also includes

[0021] The movable support includes an upper fixed plate and a lower fixed plate, which are fixed together by connecting columns. The upper connecting pipe is fixed to the upper fixed plate by connectors, and the lower connecting pipe is fixed to the lower fixed plate by connectors. Several casters are provided at the bottom of the lower fixed plate. In this design, the entire pipeline and controller are installed within the movable support. The movable support is mainly composed of the upper and lower fixed plates connected together, with the connecting pipe positioned between them and fixed to the upper and lower fixed plates by clamp connectors. The movable support is equipped with casters, allowing for the movement of the testing device for convenient use.

[0022] As a preferred embodiment, the controller includes a PID controller and a digital display. The PID controller is connected to both the temperature and humidity sensor and the heater, while the digital display is connected to the temperature and humidity sensor. In this embodiment, the controller includes a PID controller section connected to the heater. The PID controller acquires the temperature detected by the temperature and humidity sensor and controls the heater to maintain the temperature within a set range. When the temperature exceeds the set value, the cooling fan is activated to remove heat from the pipe until the temperature drops back to the set range. The digital display shows the real-time temperature and humidity data collected by the temperature and humidity sensor within the pipe.

[0023] As a preferred embodiment, a barometer is connected to the air outlet connection pipe. In this embodiment, a barometer is connected to each air outlet connection pipe, and a hole is made in the air outlet connection pipe. The barometer is then inserted into the hole to read the static pressure value of the fan, thus evaluating the overall performance of the fan.

[0024] As a preferred embodiment, water inlet pipes are provided at both ends of the lower connecting pipe. The water inlet pipes are used to add water to the lower connecting pipe. Before the test, the water inlet pipe head is opened to pour water into the lower connecting pipe until the lower connecting pipe is half full of water, and then the water inlet pipe is closed.

[0025] As a preferred embodiment, the central pipe is located in the middle of the upper and lower connecting pipes, with the outlet and inlet connecting pipes symmetrically arranged on both sides of the central pipe. In this design, the connecting pipe structure is symmetrically distributed around the central pipe, with the outlet and inlet connecting pipes symmetrically distributed on both sides, forming a one-to-one correspondence. During testing, driven by the airflow, the water in the lower connecting pipe moves upwards with the airflow, passing through the inlet connecting pipe, the fan, and the outlet connecting pipe, before returning to the same central pipe in the middle of the upper connecting pipe.

[0026] Therefore, the advantages of the present invention are:

[0027] 1. A connecting pipe is installed to connect to the fan. The connecting pipe and the central pipe form a closed circulation system. Water and air circulate under the drive of the fan. Heating and cooling mechanisms are installed on the central pipe to control the temperature inside the pipe. This accurately simulates the extreme climatic conditions under which the brushless motor of the fan works, making the test closer to the real situation and the test results more accurate.

[0028] 2. The connecting pipes can connect to multiple fans, allowing multiple fans to be tested at once, thus improving testing efficiency. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a schematic diagram of one structure of the central tube in this invention;

[0031] Figure 3 This is a cross-sectional view of the central tube in this invention.

[0032] 1-Inlet air connecting pipe 2-Outlet air connecting pipe 3-Upper connecting pipe 4-Lower connecting pipe 5-Central pipe 6-Heating pipe 7-Heater 8-Cooling pipe 9-Cooling fan 10-Temperature and humidity sensor 11-Placement pipe 12-Upper fixing plate 13-Lower fixing plate 14-Connecting column 15-Moving wheel 16-PID controller 17-Digital display 18-Barometer 19-Water inlet pipe 20-Fan. Detailed Implementation

[0033] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0034] Example:

[0035] This embodiment describes a waterproof testing device for a brushless fan motor, such as... Figure 1 As shown, the system includes a movable support, connecting pipes, a central pipe 5, and a controller. The connecting pipes are housed within the movable support and include several inlet connecting pipes 1 connecting to the air inlets of the fans 20 and several outlet connecting pipes 2 connecting to the air outlets of the fans. The inlet and outlet connecting pipes correspond one-to-one. The inlet connecting pipes are connected via a lower connecting pipe 4, and the outlet connecting pipes are connected via an upper connecting pipe 5. Water inlet pipes 19 are connected to both ends of the lower connecting pipe. The central pipe connects the upper and lower connecting pipes and has a heating mechanism and a cooling mechanism installed outside it. The connecting pipes can connect multiple fans for simultaneous testing. In this embodiment, four fans are preferred, resulting in four pairs of inlet and outlet connecting pipes. The central pipe is located in the middle of the upper and lower connecting pipes, and the outlet and inlet connecting pipes are symmetrically arranged on both sides of the central pipe. The controller acquires temperature and humidity information within the pipes and controls the heating and cooling mechanisms to maintain the temperature within a set range, and controls the brushless motor to reach a set speed.

[0036] like Figure 2 As shown, the heating mechanism includes a heating tube 5 and a heater 6. The heating tube replaces a section of the central tube, and both ends of the heating tube are connected to the central tube via pipes. The metal tube has good thermal conductivity, and the heating tube is made of aluminum. The heater is wrapped around the heating tube and is connected to and controlled by the controller.

[0037] like Figure 1 and Figure 3 As shown, the cooling mechanism includes a cooling pipe 8 and a cooling fan 9. The cooling pipe is sleeved outside the central pipe and fixed. There is a gap between the cooling pipe and the central pipe to form a cooling channel. The air outlet of the cooling fan is connected to the middle of the cooling pipe. The cooling fan is connected to the controller and is controlled by the controller.

[0038] The device also includes a temperature and humidity sensor 10 for collecting temperature and humidity data inside the pipe, such as... Figure 3As shown, a placement tube 11 is provided on the upper connecting tube corresponding to the connection of the central tube. The placement tube is isolated from the central tube. The temperature and humidity sensor is installed inside the placement tube. The front probe extends into the upper connecting tube. The temperature and humidity sensor is connected to the controller.

[0039] The controller includes a PID controller 16 and a digital display 17. The PID controller is connected to the temperature and humidity sensor and the heater, respectively, while the digital display is connected to the temperature and humidity sensor. The PID controller acquires the temperature detected by the temperature and humidity sensor and controls the heater to maintain the temperature within a set range. The digital display shows the temperature and humidity inside the pipe collected by the temperature and humidity sensor in real time. The controller also includes a main controller, connected to the PID controller, cooling fans, and junction boxes of each fan. This main controller controls the cooling fans based on the temperature and humidity conditions. When the temperature exceeds the set value, it controls the cooling fans to operate, removing heat from the pipe until the temperature drops to the set range. It also controls the motor speed, reading the motor speed and adjusting it to the set speed. A barometer 18 is connected to each air outlet pipe to read the static pressure value of the fan and evaluate the overall performance of the fan.

[0040] The movable support includes an upper fixed plate 12 and a lower fixed plate 13, which are fixed together by a connecting column 14. The upper connecting pipe is fixed to the upper fixed plate by a connector, and the lower connecting pipe is fixed to the lower fixed plate by a connector. Casters are provided at the bottom of the lower fixed plate. The testing device can be moved for easy use.

[0041] The fan to be tested is installed between the inlet and outlet connecting pipes. Before starting the test, water is injected into the lower connecting pipe through the inlet pipe until the pipe is half full. The fan is started by a brushless motor. At low speeds, the fan cannot move the water in the lower connecting pipe. The controller reads the real-time speed of the motor through the motor signal line and adjusts the voltage of the motor signal line to adjust the motor speed. Once the set speed is reached, the water in the lower connecting pipe moves upward with the airflow, passing through the inlet connecting pipe, the fan, the outlet connecting pipe, and the upper connecting pipe before returning to the central pipe and finally entering the lower connecting pipe. After the fan starts running, to simulate a real external environment, the controller regulates the temperature inside the pipe. The heating mechanism is controlled to maintain the temperature at a set value. When the heating temperature exceeds the set value, the cooling mechanism is controlled to blow air in, carrying away the heat from the pipe and keeping the temperature within the set range.

[0042] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0043] Although this document frequently uses terms such as inlet connecting pipe, outlet connecting pipe, upper connecting pipe, lower connecting pipe, and central pipe, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A waterproof testing device for a brushless fan motor, characterized in that: include, The connecting pipes include several inlet connecting pipes that connect to the air inlet of the fan and several outlet connecting pipes that connect to the air outlet of the fan. The inlet connecting pipes are connected to each other through a lower connecting pipe, and the outlet connecting pipes are connected to each other through an upper connecting pipe. Water inlet pipes are respectively provided at both ends of the lower connecting pipe. A central pipe connects the upper and lower connecting pipes, forming a closed-loop system with the connecting pipes. A heating mechanism and a cooling mechanism are installed outside the central pipe. The heating mechanism includes a heating pipe and a heater. The two ends of the heating pipe are connected to the central pipe, forming an integral pipe with the central pipe. The heater is wrapped around the heating pipe. The cooling mechanism includes a cooling pipe and a cooling fan. The cooling pipe is sleeved outside the central pipe, forming a cooling channel with the central pipe. The air outlet of the cooling fan is connected to the cooling pipe. The controller acquires temperature and humidity information inside the pipeline, controls the heating and cooling mechanisms to keep the temperature within the set range, and controls the brushless motor to reach the set speed.

2. The waterproof testing device for a brushless fan motor according to claim 1, characterized in that: The heater is connected to the controller.

3. The waterproof testing device for a brushless fan motor according to claim 2, characterized in that: The cooling fan is connected to the controller.

4. The waterproof testing device for a brushless fan motor according to claim 2, characterized in that: It also includes, A temperature and humidity sensor is provided with a placement tube on the upper connecting tube corresponding to the connection of the central tube. The temperature and humidity sensor is installed in the placement tube and extends into the upper connecting tube. The temperature and humidity sensor is connected to the controller.

5. A waterproof testing device for a brushless fan motor according to claim 1, 2, or 3, characterized in that: Also includes The movable support includes an upper fixed plate and a lower fixed plate, which are fixed together by connecting columns. The upper connecting pipe is fixed to the upper fixed plate by a connector, and the lower connecting pipe is fixed to the lower fixed plate by a connector. Several movable wheels are provided at the bottom of the lower fixed plate.

6. The waterproof testing device for a brushless fan motor according to claim 4, characterized in that: The controller includes a PID controller and a digital display. The PID controller is connected to the temperature and humidity sensor and the heater, respectively, and the digital display is connected to the temperature and humidity sensor.

7. A waterproof testing device for a brushless motor of a fan according to claim 1, 2, 3, or 4, characterized in that... A barometer is connected to the air outlet pipe.

8. A waterproof testing device for a brushless motor of a fan according to claim 1, 2, 3, or 4, characterized in that... The central tube is located in the middle of the upper connecting tube and the lower connecting tube, and the air outlet connecting tube and the air inlet connecting tube are symmetrically arranged on both sides with the central tube as the center.

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