Electromagnetic fan clutch with LED warning function

Abstract

The utility model relates to the technical field of engine cooling system discloses a kind of electromagnetic fan clutch with LED early warning function, including clutch body and be located in the clutch body big coil and small coil, the first LED early warning unit is connected on the big coil, the second LED early warning unit is connected on the small coil, the first LED early warning unit and the second LED early warning unit are connected with power module. The utility model compact appearance structure, by being configured with independent LED early warning unit for big coil and small coil, without disassembling clutch, coil current and temperature can be dynamically real-time monitored, realize early warning of fault, avoid engine overheating risk;With the help of different color LED indicator light, the fault of big coil and small coil can be quickly distinguished, compared with traditional multimeter detection mode, troubleshooting time can be significantly shortened, and maintenance efficiency is significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of engine cooling system technology, specifically to an electromagnetic fan clutch with LED warning function. Background Technology

[0002] The electromagnetic fan clutch is a core component of the engine cooling system. It controls the fan speed by switching the large coil (for high-speed cooling mode) and the small coil (for low-speed cooling mode) on and off to adapt to the engine's cooling requirements under different operating conditions. During engine bench durability tests and vehicle thermal balance tests, OEMs need to monitor the electromagnetic fan clutch coil's operating status in real time to prevent cooling system failure due to coil malfunctions (short circuit, open circuit, overheating, aging), which could lead to engine overheating.

[0003] In existing technologies, there are three main methods for detecting coil faults in electromagnetic fan clutches: First, using specialized equipment such as multimeters and diagnostic instruments requires testing in a static or disassembled state of the clutch, making dynamic real-time early warning impossible and easily missing the opportunity for early fault diagnosis; second, both large and small coils share a single testing circuit, making it difficult to quickly distinguish whether the fault originates in the large or small coil, resulting in low location efficiency; third, requiring professional personnel to operate the testing equipment, leading to complex maintenance procedures and increased vehicle repair costs and time. Although some technologies use LED temperature displays, these only address the overall clutch temperature and do not involve independent monitoring and location of coil faults, thus failing to meet the needs for accurate fault diagnosis. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing electromagnetic fan clutch coil fault detection lacks dynamic real-time early warning capabilities and cannot quickly locate specific faults in the large and small coils.

[0005] To solve the above-mentioned technical problems, the present invention provides an electromagnetic fan clutch with LED warning function, including a clutch body and a large coil and a small coil disposed in the clutch body. A first LED warning unit is connected to the large coil, and a second LED warning unit is connected to the small coil. The first LED warning unit and the second LED warning unit are connected to a power supply module. Each of the first LED warning unit and the second LED warning unit includes a sensor component, a signal processing module, and an LED indicator. The sensor component is coupled to the corresponding coil, the signal processing module is electrically connected to the sensor component, and the LED indicator is electrically connected to the signal processing module.

[0006] Optionally, the sensor assembly includes a Hall current sensor and a thermistor. The Hall current sensor is connected in series in the power supply circuit of the corresponding coil and is electrically connected to the signal processing module. The thermistor is attached to the outer surface of the corresponding coil and is electrically connected to the signal processing module.

[0007] Optionally, the LED indicator lights on the first LED warning unit and the second LED warning unit are different colors.

[0008] Optionally, the clutch body is provided with an insulating mounting base, and the signal processing module is mounted on the insulating mounting base.

[0009] Optionally, a transparent protective cover is provided on the outside of the LED indicator, and the transparent protective cover is installed on the clutch body housing.

[0010] In summary, this utility model features a compact structure. By equipping the large and small coils with independent LED warning units, it can dynamically monitor coil current and temperature in real time without disassembling the clutch, enabling early fault warning and avoiding the risk of engine overheating. Different colored LED indicator lights can quickly distinguish between faults in the large and small coils, significantly shortening troubleshooting time and improving maintenance efficiency compared to traditional multimeter testing methods. The sensor components, signal processing module, and clutch body are integrated, eliminating the need for additional external equipment and adapting to the installation space of existing automotive engines. Furthermore, the use of conventional Hall effect sensors, thermistors, and LED components results in low manufacturing costs and ease of mass production. When monitoring coil status is required during vehicle thermal balance testing, the LED indicator lights provide intuitive access to coil operating information, eliminating the need for complex diagnostic equipment and simplifying the testing process. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of the electromagnetic fan clutch with LED warning function according to this utility model; Figure 2 is a schematic diagram of the circuit connection of the LED early warning unit of this utility model; In the diagram: 1. Clutch body; 2. Large coil; 3. Small coil; 4. First LED warning unit; 41. Hall current sensor; 42. Thermistor; 43. Signal processing module; 44. LED indicator; 45. Insulating mounting base; 46. Transparent protective cover; 5. Second LED warning unit; 6. Power module. Detailed Implementation

[0012] The following combination Figure 1-2 The present invention will be described in further detail below.

[0013] Example 1 This utility model discloses an electromagnetic fan clutch with LED warning function, referencing... Figure 1and Figure 2 The clutch includes a clutch body 1 and a large coil 2 and a small coil 3 disposed within the clutch body 1. A first LED warning unit 4 is connected to the large coil 2, and a second LED warning unit 5 is connected to the small coil 3. The first LED warning unit 4 and the second LED warning unit 5 are connected to a power module 6. Both the first LED warning unit 4 and the second LED warning unit 5 include a sensor assembly, a signal processing module 43, and an LED indicator 44. The sensor assembly is coupled to the corresponding coil, the signal processing module 43 is electrically connected to the sensor assembly, and the LED indicator 44 is electrically connected to the signal processing module 43.

[0014] In a further embodiment, the sensor assembly includes a Hall current sensor 41 and a thermistor 42. The Hall current sensor 41 is connected in series in the power supply circuit of the corresponding coil and is electrically connected to the signal processing module 43. The thermistor 42 is attached to the outer surface of the corresponding coil and is electrically connected to the signal processing module 43. The Hall current sensor 41 is used to collect the current signal of the coil, and the thermistor 42 is used to collect the temperature signal of the coil.

[0015] Specifically, the Hall current sensor 41 of the first LED warning unit 4 is coupled to the large coil 2, the positive terminal of the power module 6 is connected to the Hall current sensor 41, the thermistor 42 is attached to the outer surface of the large coil 2, the signal processing module 43 is connected to the Hall current sensor 41 and the thermistor 42 respectively, and the LED indicator 44 is connected to the signal processing module 43 and then connected to the negative terminal of the power module 6. The Hall current sensor 41 of the second LED warning unit 5 is coupled to the small coil 3. The positive terminal of the power module 6 is connected to the Hall current sensor 41. The thermistor 42 is attached to the outer surface of the small coil 3. The signal processing module 43 is connected to the Hall current sensor 41 and the thermistor 42 respectively. The LED indicator 44 is connected to the signal processing module 43 and then connected to the negative terminal of the power module 6.

[0016] In a further embodiment, the signal processing module 43 is integrated into the control cavity of the clutch body 1. The clutch body 1 is provided with an insulating mounting base 45. The signal processing module 43 is mounted on the insulating mounting base 45 to avoid electromagnetic interference with the coil. It is used to compare the collected current and temperature signals with the preset working range and output a warning control signal. The signal processing module 43 uses an STM32F030 MCU, with a preset normal operating current range of 5-8A and a normal operating temperature range of -40℃ to 120℃ for the large coil 2, and a normal operating current range of 3-5A and a normal operating temperature range of -40℃ to 120℃ for the small coil 3.

[0017] In a further embodiment, a transparent protective cover 46 is provided on the outside of the LED indicator 44 to prevent the indicator from being corroded by dust, coolant, etc. The transparent protective cover 46 is installed on the outer shell of the clutch body 1 and is electrically connected to the output terminal of the signal processing module 43 to display different working states according to the warning control signal; the power module 6 is electrically connected to the engine power supply system to provide a stable working voltage for the sensor assembly, the signal processing module 43, and the LED indicator 44.

[0018] In use, the Hall current sensor 41 can adopt a patch structure and be attached to the surface of the coil power supply line wire to reduce space occupation. The LED indicator 44 on the first LED warning unit 4 and the second LED warning unit 5 are different colors to distinguish the corresponding coils.

[0019] When the electromagnetic fan clutch is working normally, the current of the large coil 2 is 6A and the temperature is 80℃. After the sensor component of the first LED warning unit 4 collects the signal, the signal processing module 43 determines that the state is normal, and the LED indicator 44 is constantly green. The current of the small coil 3 is 4A and the temperature is 75℃. After the sensor component of the second LED warning unit 5 collects the signal, the signal processing module 43 determines that the state is normal, and the LED indicator 44 is constantly blue. When a short circuit fault occurs in the large coil 2, the Hall current sensor 41 on the first LED warning unit 4 detects a sudden increase in current to 12A (more than 20% above the normal operating range). The signal processing module 43 outputs a warning signal, and the LED indicator 44 changes from solid green to flashing red (flashing frequency 2Hz), indicating that the large coil 2 is short-circuited. Similarly, when a short circuit fault occurs in the small coil 3, the corresponding LED indicator 44 changes from solid blue to flashing cyan. When the small coil 3 overheats, the thermistor 42 detects that the temperature has risen to 130℃ (out of normal operating range), the signal processing module 43 outputs a warning signal, and the LED indicator 44 changes from solid blue to flashing yellow (flashing frequency 1Hz), indicating that the small coil 3 is overheating. Similarly, when the large coil 2 overheats, the corresponding LED indicator 44 changes from solid green to flashing white.

[0020] Example 2 The difference between this embodiment and embodiment 1 is that the LED indicator 44 uses a three-color LED (red, green, and blue). Under normal working conditions, the green indicator is constantly lit; under abnormal current conditions, the red indicator flashes; and under abnormal temperature conditions, the blue indicator flashes. There is no need to distinguish between large and small coils using different colored LEDs. Fault location is achieved solely through the installation position of the LED indicator 44. For example, the large coil 2 corresponds to the indicator on the left side of the clutch housing, and the small coil 3 corresponds to the indicator on the right side, further simplifying the structure and adapting it to miniaturized electromagnetic fan clutches.

[0021] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An electromagnetic fan clutch with LED warning function, characterized in that, The clutch includes a clutch body (1) and a large coil (2) and a small coil (3) disposed within the clutch body (1). A first LED warning unit (4) is connected to the large coil (2), and a second LED warning unit (5) is connected to the small coil (3). The first LED warning unit (4) and the second LED warning unit (5) are connected to a power supply module (6). The first LED warning unit (4) and the second LED warning unit (5) each include a sensor assembly, a signal processing module (43), and an LED indicator (44). The sensor assembly is coupled to the corresponding coil, the signal processing module (43) is electrically connected to the sensor assembly, and the LED indicator (44) is electrically connected to the signal processing module (43).

2. The electromagnetic fan clutch with LED warning function according to claim 1, characterized in that, The sensor assembly includes a Hall current sensor (41) and a thermistor (42). The Hall current sensor (41) is connected in series in the power supply circuit of the corresponding coil and is electrically connected to the signal processing module (43). The thermistor (42) is attached to the outer surface of the corresponding coil and is electrically connected to the signal processing module (43).

3. The electromagnetic fan clutch with LED warning function according to claim 1, characterized in that, The LED indicator lights (44) on the first LED warning unit (4) and the second LED warning unit (5) are different colors.

4. The electromagnetic fan clutch with LED warning function according to claim 1, characterized in that, The clutch body (1) is provided with an insulating mounting base (45), and the signal processing module (43) is mounted on the insulating mounting base (45).

5. The electromagnetic fan clutch with LED warning function according to claim 1, characterized in that, The LED indicator (44) is provided with a transparent protective cover (46) on the outside, and the transparent protective cover (46) is installed on the outer shell of the clutch body (1).

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