A reversing fan angle control system

Abstract

The utility model discloses a commutating fan angle control system for solving the problem that the existing vehicle-mounted ECU automatic control system needs to rely on the original vehicle ECU, and develops a control system based on singlechip and independent configuration. Among them, linear hall sensor integrated installation is at the rotary joint of commutating fan, and installs magnet on the piston of fan's corresponding position, signal port of linear hall sensor accesses singlechip, temperature sensor is installed on the water tank or is close to the water outlet pipe of water tank, and the data interface of temperature sensor is connected to singlechip, and the system is a set of vehicle water tank temperature control system relying on singlechip, specifically, through being used for monitoring and sensing the water temperature in the water tank, when the water temperature is lower than the set temperature threshold value, the singlechip controls the commutating fan to keep the fan blade smaller angle, reduces the heat dissipation of fan, and then rapidly promotes the water temperature of water tank.

Description

Technical Field

[0001] This utility model relates to the field of commutator fan control technology. Background Technology

[0002] On June 4, 2024, the applicant filed an application for a variable pitch and commutating fan, detailing the mechanical structure for changing the blade angle or switching direction. This application extends to all commercially available commutating fans, whether pneumatically or hydraulically controlled. In addition to the commutating mechanical structure, a corresponding electronic control system is required to initiate the commutation action electronically. Depending on whether the commutation is automatic or confirmed by a button, it can be categorized into mechanical switch control systems and onboard ECU control systems. The principle and process of the mechanical switch control system is that when commutation is needed, a manual button is pressed to control the fan power source, thus commutating the fan. This is the control method currently used by most commutating fans. The technical advantages of this mechanical switch control system are its simplicity, reliability, and low implementation cost. The disadvantage is that the mechanical switch control method can only manually control the fan commutation based on experience and cannot automatically control it.

[0003] ECU automatic control system, as the name suggests, uses an onboard ECU for control. This involves integrating a temperature sensor into the vehicle's radiator and setting operating times within the ECU. When the set time or the temperature from the sensor reaches a predetermined logic threshold, the ECU sends a command to automatically reverse the direction of the commutator fan. This type of ECU automatic control system is typically a factory-installed feature, and the backflushing time and temperature threshold settings are predetermined at the factory and cannot be altered by the driver or maintenance personnel during subsequent use. Furthermore, in current technology, the commutator command issued by the onboard ECU can only control and drive the commutator fan to begin operation; it cannot control the angle of each blade within the commutator fan, meaning it cannot accurately keep the blades in a specified position (at a specified angle), thus failing to achieve precise angle adjustment. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a commutator fan angle control system, which solves the problem that existing vehicle ECU control systems rely on the original vehicle ECU, and develops a microcontroller-based and independently configured control system.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows:

[0006] A commutator fan angle control system includes a commutator fan, a commutator power unit, a DC power supply module, a microcontroller, a temperature sensor, and a linear Hall sensor. The linear Hall sensor is integrated into the rotary joint of the commutator fan, with a magnet installed at a corresponding position on the fan piston. The signal port of the linear Hall sensor is connected to the P1.4 port of the microcontroller. The temperature sensor is installed inside a water tank, and its data interface is connected to the P1.5 port of the microcontroller. The commutator power unit is connected to a three-way pipe via a first solenoid valve and a check valve. The second path of the three-way pipe is connected to the rotary joint of the commutator fan, and the third path of the three-way pipe is connected to an oil tank via a second solenoid valve. The signal terminals of two relays controlling the opening and closing of the first and second solenoid valves are connected to the P5.5 and P5.4 ports of the microcontroller.

[0007] Furthermore, it also includes an onboard Bluetooth module and a handheld terminal. The P3.0 port and P3.1 port of the microcontroller are electrically connected to the onboard Bluetooth module, and the onboard Bluetooth module has a wireless communication connection with the Bluetooth module in the handheld terminal.

[0008] Furthermore, the step-down module is electrically connected to and supplies power to the onboard Bluetooth module.

[0009] Furthermore, it also includes a remote controller, which is electrically connected to the P1.0 port of the microcontroller.

[0010] Furthermore, the reversing power unit is a hydraulic power unit or a pneumatic power unit.

[0011] Furthermore, the first and second solenoid valves are two-position two-way solenoid valves.

[0012] The beneficial effects of this utility model are as follows: This system is a system for controlling the temperature of a vehicle's water tank using a microcontroller. Specifically, it is used to monitor and sense the water temperature inside the water tank. When the water temperature is lower than the set temperature threshold, the microcontroller controls the commutator fan to maintain a small angle of the fan blades, reducing the fan's heat dissipation and thus quickly raising the water temperature in the water tank. When the water temperature is within the set temperature range, the microcontroller controls the commutator fan to maintain a reasonable angle of the fan blades, ensuring that the fan's heat dissipation is equal to the engine's heat output, thereby maintaining the water temperature in the water tank and reducing power consumption. When the water temperature exceeds the set temperature threshold, the microcontroller controls the commutator fan to flip or change the angle of the fan blades, thereby lowering the water temperature in the water tank.

[0013] The temperature sensor is installed on the water tank or on the outlet pipe near the water tank, and its data interface is connected to the microcontroller. This control system has functions of mechanical switch control, remote control control, and handheld terminal control. A detailed description follows with specific embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the control principle of this control system.

[0015] Figure 2 This is the circuit diagram of a microcontroller.

[0016] Figure 3 This is the circuit diagram of the DC power supply module.

[0017] Figure 4 This is a circuit diagram of a linear Hall sensor.

[0018] Figure 5 This is the circuit diagram of the step-down module.

[0019] Figure 6 This is the circuit diagram for the Bluetooth module.

[0020] Figure 7 This is the circuit diagram of the temperature sensor module.

[0021] Figure 8 This is the circuit diagram for a relay.

[0022] Figure 9 This is a partial structural diagram of a commutator fan.

[0023] In the picture:

[0024] 10. Commutating fan; 20. Temperature sensor; 30. Linear Hall sensor; 31. Magnet; 40. Rotary joint. Detailed Implementation

[0025] refer to Figure 1 This embodiment introduces a commutator fan 10 angle control system, which is independent of the original vehicle ECU. It includes a commutator fan 10, a commutator power unit, a DC power supply module, a step-down module, a microcontroller, a Bluetooth module, a handheld terminal, a solenoid valve, a relay, a temperature sensor 20, and a linear Hall sensor 30.

[0026] The linear Hall sensor 30 is integrated and mounted at the rotary joint of the commutator fan 10, for reference. Figure 9 The model used is a linear Hall sensor 30 (model: HAL2425). The linear Hall sensor 30 is a general-purpose magnetic field sensor, a purchased module, with a linear output based on the Hall effect. It is used for distance and linear motion measurement. In this embodiment, the linear Hall sensor 30 is mounted on the rotary joint 40. During operation, the linear Hall sensor 30 remains stationary along with the rotary joint. A magnet 31 is installed at a corresponding position on the fan piston to provide a magnetic field. The linear Hall sensor 30 collects the linear displacement of the piston in the commutating fan 10, and the change angle of the fan blades is determined by comparing this linear displacement.

[0027] The signal port of the aforementioned linear Hall sensor 30 is connected to the MISO / ADC4 / P1.4 port (referred to as the P1.4 port) of the microcontroller.

[0028] In this embodiment, the temperature sensor 20 is installed inside the water tank or on the outlet pipe near the water tank, and the data interface of the temperature sensor 20 is connected to the SCLK / ADC5 / P1.5 port (referred to as the P1.5 port) of the microcontroller. This is used to monitor and sense the water temperature inside the water tank, and when the water temperature reaches the set temperature threshold, corresponding fan reversing measures are taken.

[0029] refer to Figure 1 The reversing power unit can be a miniature integrated hydraulic pump station, a miniature integrated air compressor, or a vehicle's original compressed air power unit. Its function is to provide driving force for the reversing action of the reversing fan 10. Taking the miniature integrated hydraulic pump station as an example, the hydraulic pump in this reversing power unit is connected to a three-way pipe through a solenoid valve and a check valve. The second path of this three-way pipe is connected to the rotary joint of the reversing fan 10 to supply hydraulic oil to the reversing fan 10. The third path of this three-way pipe is connected to the oil tank through a solenoid valve for depressurization. Both solenoid valves are two-position two-way solenoid valves. The opening and closing of solenoid valve 1 is controlled by relay 1, and the opening and closing of solenoid valve 2 is controlled by relay 2. The signal terminals of the two relays are connected to the CMP+ / P5.5 port and CMP- / MCLKO / RST / P5.4 port of the microcontroller (referred to as the P5.5 port and P5.4 port).

[0030] The commutation power unit drives the fan blades in the commutation fan 10 to commutate, change, or maintain their angle by changing the on / off state of two solenoid valves. When solenoid valve 1 is open and solenoid valve 2 is open, the fan angle changes; when solenoid valve 1 is closed and solenoid valve 2 is open, the fan angle is maintained; when solenoid valve 1 is closed and solenoid valve 2 is closed, the fan returns to its initial state.

[0031] Figure 2 This is the circuit diagram of a microcontroller (model STC15W408AS).

[0032] Figure 3 The diagram below shows the circuit of the DC power supply module (model: XL1509 switching power supply). This system uses 12V-30V DC power. The microcontroller is an external microcontroller. After passing through a diode (for reverse connection protection), the voltage is stepped down to 5V by the XL1509 switching power supply to power the microcontroller (STC15W408AS) and the linear Hall sensor 30 (HAL2425). The 5V voltage is then stepped down to 3.3V by the AMS1117-3.3 step-down module to power the Bluetooth module.

[0033] Figure 4This is the circuit diagram for the linear Hall sensor 30 (HAL2425). The microcontroller's P1.4 port is directly electrically connected to the linear Hall sensor 30, which is installed at the rotary joint of the commutator fan 10 and paired with the magnet 31 on the piston to sense the linear displacement data of the piston. The linear sensor measures the magnetic field strength inside the fan to determine the fan's commutation angle. Based on the value detected by the linear Hall sensor 30, the program converts it into a corresponding distance and assigns the distance to the corresponding fan blade angle.

[0034] Figure 5 This is the circuit diagram for the AMS1117-3.3 step-down module, which steps down the voltage to 3.3V to power the Bluetooth module.

[0035] Figure 6 The microcontroller's P1.0 / ADC0 / CCP1 port (referred to as P1.0 port) is the signal decoding port for the remote control receiver. The P3.0 / RXD / INT4# / T2CLKO port (referred to as P3.0 port) and P3.1 / TXD / T2 port (referred to as P3.1 port) are data communication ports. They connect and transmit signals to the onboard Bluetooth module. This onboard Bluetooth module communicates with the Bluetooth module in the handheld terminal. That is, users can use WeChat mini-programs to view the data stored in the microcontroller (including time, temperature, etc.) and modify the corresponding parameters in the microcontroller.

[0036] Figure 7 The temperature sensor module 20 is connected to the SCLK / ADC5 / P1.5 port (referred to as the P1.5 port) of the microcontroller. The P1.5 port of the microcontroller reads the water tank temperature. Specifically, the temperature sensor 20 is installed inside the water tank, and the data interface of the temperature sensor 20 is connected to the P1.5 port of the microcontroller.

[0037] Figure 8 The circuit diagram shows the relays controlling the solenoid valves. Two relays, electrically connected via the P5.5 and P5.4 ports of the microcontroller, control the corresponding solenoid valves, thereby controlling the fan's reversing, homing, and angle holding.

[0038] The control system obtains the blade angle of the commutator fan 10 by reading the temperature signal from an external location, and controls the hydraulic system through an external microcontroller. By controlling the hydraulic oil volume of the hydraulic system, the control system drives the blade of the commutator fan 10 to change. During the angle change, the system receives feedback from the linear Hall sensor 30 and uses the comparison relationship between distance and angle to precisely control the change of the blade angle, thereby changing the airflow of the fan and meeting the heat dissipation requirements.

[0039] When the power source of the commutating fan 10 is a hydraulic drive system, the hydraulic drive system controls the input of hydraulic oil to the commutating fan 10 through a solenoid valve, and achieves control of the fan angle through precise control of the hydraulic oil.

Claims

1. A commutator fan angle control system, comprising a commutator fan, a commutator power unit, a DC power supply module, a microcontroller, a temperature sensor, and a linear Hall sensor, characterized in that: The linear Hall sensor is integrated and installed at the rotary joint of the commutator fan, and a magnet is installed at the corresponding position on the piston of the commutator fan. The signal port of the linear Hall sensor is connected to the P1.4 port of the microcontroller. The temperature sensor is installed in the water tank, and the data interface of the temperature sensor is connected to the P1.5 port of the microcontroller. The commutator power unit is connected to a three-way pipe through a first solenoid valve and a check valve. The second path of the three-way pipe is connected to the rotary joint of the commutator fan, and the third path of the three-way pipe is connected to the oil tank through a second solenoid valve. The signal terminals of the two relays that control the opening and closing of the first and second solenoid valves are connected to the P5.5 and P5.4 ports of the microcontroller.

2. The commutator fan angle control system according to claim 1, characterized in that, It also includes an onboard Bluetooth module and a handheld terminal. The P3.0 port and P3.1 port of the microcontroller are electrically connected to the onboard Bluetooth module, and the onboard Bluetooth module has a wireless communication connection with the Bluetooth module in the handheld terminal.

3. The commutator fan angle control system according to claim 2, characterized in that, The step-down module is electrically connected and supplies power to the onboard Bluetooth module.

4. The commutator fan angle control system according to claim 1, characterized in that, It also includes a remote control, which is electrically connected to the P1.0 port of the microcontroller.

5. A commutator fan angle control system according to claim 1, characterized in that, The reversing power unit is either a hydraulic power unit or a pneumatic power unit.

6. The commutator fan angle control system according to claim 1, characterized in that, The first and second solenoid valves are two-position two-way solenoid valves.

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