A system and method for de-icing aircraft propellers

Abstract

This invention discloses a system and method for de-icing aircraft propellers, relating to the field of de-icing device technology. The system includes a de-icing control module and a de-icing circuit breaker. The remote circuit breaker receives a standby command, sends it to the de-icing control module, and allows the de-icing control module to power on. The de-icing control module receives the standby command from the remote circuit breaker, powers on, and can distribute energy to a portion of the multiple de-icing units in turn. The method includes de-icing control steps, which include the remote circuit breaker receiving a standby command, sending it to the de-icing control module, and allowing the de-icing control module to power on. The de-icing control module receives the standby command from the remote circuit breaker, powers on, and distributes energy to a portion of the multiple de-icing units in turn. By distributing energy to a portion of the multiple de-icing units in turn through the de-icing control module and the de-icing circuit breaker, de-icing control is achieved.

Description

Technical Field

[0001] This invention relates to the field of de-icing devices, and more particularly to a system and method for de-icing aircraft propellers. Background Technology

[0002] The authorization notice number is CN108979752B, and the title is "De-icing Compressor and De-icing Process for Turbofan Engines." The compressor, also known as a turbocharger, includes an inlet structure through which pressurized hot fluid from a high-pressure compressor is circulated for de-icing. The de-icing structure includes a deformable membrane through which the circulated pressurized fluid passes. If ice accumulates on the membrane, the circulation of the pressurized fluid is impeded, resulting in pressure that deforms the membrane, causing the accumulated ice to break.

[0003] The authorization notice number is CN1012427B, and the name is "De-icing Unit Control System." A pressurized air source is connected to several control valves and a regulating valve, which has a vacuum output line, also connected to these control valves. Driven by a timer, these control valves alternately raise and lower the de-icing unit via pressure and vacuum lines. The control valves also respond to a pressure detector to seal or lock the pressurized de-icing unit in this sequence.

[0004] Authorization notice number CN102438896B, entitled "De-icing Device for Propeller Fan Blades." The device includes a propulsion unit comprising a turbine that drives at least one rotor. The rotor includes multiple blades arranged around an annular crown that moves with the blades. The outer wall of the annular crown forms a partial outer casing of the propulsion unit, which is subjected to atmospheric conditions outside the propulsion unit. The turbine generates a flow of hot gas exiting through an annular pulse tube, which is coaxial with the moving annular crown and whose surface is partially defined by the inner wall of the moving annular crown. The device includes: means for extracting thermal energy from the hot pulse tube, disposed within a moving annular component; means for transferring thermal energy to the rotor blades; and means for distributing thermal energy to at least a portion of the surface of the blades.

[0005] The authorization announcement number is CN111731485B, entitled "An Autonomous Intermittent De-icing Device and Its Installation and De-icing Method." One such autonomous intermittent de-icing device includes a memory material support and an electric heating module. Several memory material supports are arranged, and each support is connected to the electric heating module. When the memory material supports are placed on the inner wall, the electric heating module has two states: State 1: the contact surface of the electric heating module is not in contact with the inner wall; State 2: the contact surface of the electric heating module is in contact with the inner wall. The electric heating module provides localized, instantaneous, and rapid heating of the ice layer. The vaporization of the ice layer at the contact surface with the inner wall generates pressure that can break up a large area of ​​ice. Compared with the slow heating in existing technologies, this device has the advantage of higher energy utilization per unit area for de-icing; it also has the advantages of simple and reliable structure.

[0006] Based on the aforementioned patent documents and existing technical solutions, the existing technical solutions are analyzed as follows.

[0007] In northern my country, icy and snowy weather is frequent in winter, making aircraft surfaces highly susceptible to icing. Icing affects the aerodynamic shape and flight safety, posing a significant hazard. On propeller-driven aircraft, if ice forms on the leading edge of the propeller blades, it disrupts the propeller's aerodynamic and mass balance, causing vibration and preventing normal operation. Therefore, to ensure flight safety, de-icing measures must be implemented for the propeller. Since the surface area for de-icing is relatively small, electrothermal de-icing is the most suitable anti-icing device.

[0008] Existing technical problems and considerations: How to solve the technical problems of aircraft surface de-icing control. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to provide a system and method for de-icing aircraft propellers, thereby solving the technical problem of de-icing control.

[0010] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a system for de-icing aircraft propellers includes a de-icing control module and a de-icing circuit breaker. The de-icing circuit breaker is electrically connected to the de-icing control module. The remote circuit breaker is used to receive a standby command, send it to the de-icing control module, and allow the de-icing control module to be powered on. The de-icing control module is used to receive the standby command sent by the remote circuit breaker, be powered on, and be able to distribute energy to a portion of the multiple de-icing units in turn.

[0011] A further technical solution is that the de-icing control module is a program module, which is also used to obtain allocation instructions and allocate them according to the allocation instructions.

[0012] A further technical solution is that the de-icing control module is also used to distribute energy to each de-icing unit in turn.

[0013] A further technical solution is that the de-icing control module includes a controller and multiple drive units. The controller is used to control each drive unit to work in turn, and each drive unit is used to control the energy output and supply the corresponding de-icing unit to work.

[0014] A further technical solution includes a housing, with the drive unit located inside the housing, which is used to shield against interference.

[0015] A further technical solution includes a diode, which is electrically connected to the drive unit and is used to protect the drive unit.

[0016] A further technical solution includes a shunt, with the remote circuit breaker electrically connected to the shunt. The shunt is used to obtain the operating data of the remote circuit breaker and send it to the de-icing ammeter.

[0017] A further technical solution involves using a relay as the driving unit.

[0018] A further technical solution is that the controller is used to control each relay to turn on in turn and to supply power to the corresponding de-icing unit.

[0019] A further technical solution is that the drive unit includes a first relay and a second relay, and the de-icing unit includes a first de-icing unit and a second de-icing unit, with the partial de-icing unit being one of the two de-icing units.

[0020] A further technical solution is that the controller includes a remote circuit breaker, which is connected to each relay respectively.

[0021] A further technical solution includes a first de-icing control module, which is used to enable the remote circuit breaker to receive a standby command, activate the remote circuit breaker and allow all relays to be powered on, and after the first relay receives power, it conducts and is used to power the first de-icing unit, and after the second relay receives power, it conducts and is used to power the second de-icing unit.

[0022] A further technical solution includes a de-icing ammeter, which is electrically connected to the shunt.

[0023] A further technical solution includes: a manual de-icing mode switch, an automatic de-icing mode switch, a de-icing control circuit breaker, and a de-icing timer. The de-icing control circuit breaker is electrically connected to the automatic de-icing mode switch, the automatic de-icing mode switch is electrically connected to the manual de-icing mode switch, the automatic de-icing mode switch is electrically connected to the de-icing timer, the manual de-icing mode switch is electrically connected to the de-icing control module, and the de-icing timer is electrically connected to the de-icing control module.

[0024] A further technical solution is as follows: The first de-icing control module is also used to detect when the de-icing circuit breaker is pressed and turned on, generate a standby command, send it to the de-icing control module, and allow the de-icing control module to be powered on; the de-icing control circuit breaker detects when it is pressed and turned on, generates a start command and sends it to the automatic de-icing mode switch, the automatic de-icing mode switch receives the start command and is powered on; the manual de-icing mode switch detects when it is toggled to its first or second side, generates a working command and sends it to the de-icing control module, the de-icing control module receives the working command and is used to power a corresponding de-icing unit; the automatic de-icing mode switch detects when it is toggled to its first or second side, generates a power frequency command and sends it to the de-icing timer, the de-icing timer receives the power frequency command and controls a de-icing unit to alternately conduct power supply according to the corresponding power frequency; the de-icing unit is a de-icing sleeve, the de-icing sleeve includes a first de-icing sleeve and a second de-icing sleeve, the first de-icing sleeve is set inside the propeller, the second de-icing sleeve is set outside the propeller, and the two de-icing sleeves are used to obtain power through conductive slip rings.

[0025] A further technical solution includes a first de-icing brush and a second de-icing brush, wherein the de-icing control module is electrically connected to the first de-icing brush and the de-icing control module is electrically connected to the second de-icing brush.

[0026] A method for de-icing an aircraft propeller includes a de-icing control step, which includes a remote circuit breaker receiving a standby command, sending it to a de-icing control module, and allowing the de-icing control module to power on. The de-icing control module receives the standby command from the remote circuit breaker, powers on, and distributes energy in turn to a portion of the multiple de-icing units.

[0027] A further technical solution is as follows: the de-icing step specifically includes the following steps: the de-icing circuit breaker is notified that it has been pressed and is turned on, forming a standby command, which is sent to the remote circuit breaker and allows the remote circuit breaker to be powered on; the remote circuit breaker receives the standby command, operates, and allows all relays to be powered on; the de-icing control circuit breaker is notified that it has been pressed and is turned on, forming a start command and sending it to the automatic de-icing mode switch; the automatic de-icing mode switch receives the start command and is powered on; the automatic de-icing mode switch is notified that it has been toggled to its third side (closed position); the manual de-icing mode switch is notified that it has been toggled to its first side and is powered on, forming a first working command and sending it to the first relay; the first relay receives the first working command and is turned on to supply power to the first de-icing... The ice unit is powered; when the manual de-icing mode switch is detected to be toggled to its second side and powered on, a second working command is generated and sent to the second relay. After receiving the second working command, the second relay is powered on and used to power the second de-icing unit; when the automatic de-icing mode switch is detected to be toggled to its first side and powered on, a first power frequency command is generated and sent to the de-icing timer. After receiving the first power frequency command, the de-icing timer controls the first and second de-icing units to be powered on according to the first alternating power frequency; when the automatic de-icing mode switch is detected to be toggled to its second side and powered on, a second power frequency command is generated and sent to the de-icing timer. After receiving the second power frequency command, the de-icing timer controls the first and second de-icing units to be powered on according to the second alternating power frequency.

[0028] A system for de-icing aircraft propellers includes a computer-readable storage medium storing a computer program that, when executed by a processor, performs the aforementioned corresponding steps.

[0029] The beneficial effects of adopting the above technical solution are as follows:

[0030] First, a system for de-icing aircraft propellers includes a de-icing control module and a de-icing circuit breaker. The de-icing circuit breaker is electrically connected to the de-icing control module. A remote circuit breaker receives a standby command, sends it to the de-icing control module, and allows the de-icing control module to power on. The de-icing control module receives the standby command from the remote circuit breaker, powers on, and can distribute energy to a portion of the multiple de-icing units in turn. This technical solution, through the de-icing control module and the de-icing circuit breaker, can distribute energy to a portion of the multiple de-icing units in turn, thereby achieving de-icing control.

[0031] Second, a method for de-icing aircraft propellers includes a de-icing control step. This step includes a remote circuit breaker receiving a standby command, sending it to a de-icing control module, and enabling the de-icing control module to power on. The de-icing control module receives the standby command from the remote circuit breaker, powers on, and distributes energy in turn to a portion of the multiple de-icing units. This technical solution achieves de-icing control by distributing energy in turn to a portion of the multiple de-icing units through the de-icing control step.

[0032] See the detailed implementation section for further description. Attached Figure Description

[0033] Figure 1 This is a principle block diagram of Embodiment 1 of the present invention;

[0034] Figure 2 This is a principle block diagram of Embodiment 3 of the present invention;

[0035] Figure 3 This is a principle block diagram of Embodiment 4 of the present invention;

[0036] Figure 4 This is a schematic block diagram of the first de-icing control device of the present invention;

[0037] Figure 5 This is a schematic diagram of the second de-icing control device of the present invention;

[0038] Figure 6 This is a schematic diagram of the third de-icing control device of the present invention. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0041] Example 1:

[0042] like Figure 1As shown, this invention discloses a system for de-icing aircraft propellers, including a de-icing control module capable of alternately distributing energy to two de-icing units. The de-icing control module includes a housing, a controller, a drive unit, a shunt 2, a de-icing ammeter 18, a first de-icing brush 24 and a second de-icing brush 25, and a de-icing control program module. The controller includes a remote circuit breaker 1, a manual de-icing mode switch 19, an automatic de-icing mode switch 20, a de-icing connection circuit breaker 21, a de-icing control circuit breaker 22, and a de-icing timer 23. The drive unit includes a first relay 3 for controlling the inner de-icing sleeve, a second relay 4 for controlling the outer de-icing sleeve, a first diode 5, a second diode 6, a connector 7, a power terminal 8, a first copper strip 16, and a second copper strip 17.

[0043] like Figure 1 As shown, the de-icing unit includes a first de-icing unit and a second de-icing unit. The output terminal of the remote circuit breaker 1 is electrically connected to the first relay 3, and the output terminal of the remote circuit breaker 1 is electrically connected to the second relay 4. The controller is used to control each drive unit to work in turn, and each drive unit is used to control the energy output and supply the corresponding de-icing unit to work.

[0044] The remote circuit breaker 1, the de-icing manual mode switch 19, the de-icing automatic mode switch 20, the de-icing connection circuit breaker 21, the de-icing control circuit breaker 22, the de-icing timer 23, the first relay 3, and the second relay 4 form the de-icing control hardware module.

[0045] The housing is used to shield interference. The remote circuit breaker 1, relay, diode and shunt are all located inside the housing. The diode is used to protect the drive unit. The shunt is used to obtain the working data of the remote circuit breaker 1 and send it to the de-icing ammeter 18. The controller is used to control each drive unit to work in turn. Each drive unit is used to control the energy output and supply the corresponding de-icing unit to work.

[0046] like Figure 1 As shown, the output terminal of the remote circuit breaker 1 is electrically connected to the first relay 3, the output terminal of the remote circuit breaker 1 is electrically connected to the second relay 4, the remote circuit breaker 1 is electrically connected to the shunt 2, the first diode 5 is electrically connected between the first input terminal and the second input terminal of the first relay 3, and the second diode 6 is electrically connected between the first input terminal and the second input terminal of the second relay 4.

[0047] like Figure 1As shown, the positive terminal of the first power supply is electrically connected to the de-icing ammeter 18, the positive terminal of the first power supply is electrically connected to contact 5 of the automatic de-icing mode switch 20, contact 4 and contact 2 of the automatic de-icing mode switch 20 are electrically connected, contact 1 of the automatic de-icing mode switch 20 is electrically connected to contact 2 of the manual de-icing mode switch 19, contact 3 of the automatic de-icing mode switch 20 is electrically connected to contact 2 of the de-icing timer 23, and contact 6 of the automatic de-icing mode switch 20 is electrically connected to contact 3 of the de-icing timer 23.

[0048] like Figure 1 As shown, the positive terminal of the second power supply is electrically connected to the first input terminal of the remote circuit breaker 1. The second input terminal of the remote circuit breaker 1 is grounded via the de-icing circuit breaker 21. The first output terminal of the remote circuit breaker 1 is electrically connected to the de-icing ammeter 18 via the shunt 2. The first output terminal of the remote circuit breaker 1 is electrically connected to the chip select terminal of the first relay 3 via the shunt 2. The first output terminal of the remote circuit breaker 1 is electrically connected to the chip select terminal of the second relay 4 via the shunt 2. The first output terminal of the remote circuit breaker 1 is electrically connected to the contact 5 of the de-icing timer 23 via the shunt 2. The second output terminal of the remote circuit breaker 1 is electrically connected to the first input terminal of the first relay 3. The second output terminal of the remote circuit breaker 1 is electrically connected to the second input terminal of the second relay 4.

[0049] like Figure 1 As shown, contact 3 of the manual de-icing mode switch 19 is electrically connected to the second input terminal of the first relay 3, and contact 1 of the manual de-icing mode switch 19 is electrically connected to the first input terminal of the second relay 4. The first diode 5 is electrically connected between the first and second input terminals of the first relay 3, and the second diode 6 is electrically connected between the first and second input terminals of the second relay 4. The first input terminal of the first relay 3 is grounded, and the second input terminal of the second relay 4 is grounded.

[0050] like Figure 1 As shown, the output terminal of the first relay 3 is electrically connected to the middle contact B of the first de-icing brush 24, the output terminal of the first relay 3 is electrically connected to the middle contact B of the second de-icing brush 25, and the output terminal of the first relay 3 is electrically connected to the input terminal contact 6 of the de-icing timer 23.

[0051] like Figure 1 As shown, the output terminal of the second relay 4 is electrically connected to the outer contact A of the first de-icing brush 24, the output terminal of the second relay 4 is electrically connected to the outer contact A of the second de-icing brush 25, and the output terminal of the second relay 4 is electrically connected to the input terminal contact 4 of the de-icing timer 23.

[0052] The de-icing sleeve includes a first de-icing sleeve and a second de-icing sleeve. The first de-icing sleeve is fixed inside the propeller, and the second de-icing sleeve is fixed outside the propeller. The first de-icing sleeve is connected to a conductive slip ring, and the second de-icing sleeve is also connected to a conductive slip ring.

[0053] The de-icing control program module is used to detect that the de-icing circuit breaker 21 has been pressed and turned on, generate a standby command, send it to the remote circuit breaker 1, and allow the remote circuit breaker 1 to be powered on; the remote circuit breaker 1 receives the standby command, the remote circuit breaker 1 operates and allows all relays to be powered on, the de-icing control circuit breaker 22 receives the command and turns on, generates a start command and sends it to the de-icing automatic mode switch 20, the de-icing automatic mode switch 20 receives the start command and is powered on; the de-icing automatic mode switch 20 receives the command and is switched to its third side, i.e., the closed position, the de-icing manual mode switch 19 receives the command and is switched to its first side and is powered on, generate a first working command and send it to the first relay 3, the first relay 3 receives the first working command and turns on to power the first de-icing unit; When the manual de-icing mode switch 19 is switched to its second side and powered on, it generates a second working command and sends it to the second relay 4. After receiving the second working command, the second relay 4 is powered on and used to supply power to the second de-icing unit. When the automatic de-icing mode switch 20 is switched to its first side and powered on, it generates a first power frequency command and sends it to the de-icing timer 23. After receiving the first power frequency command, the de-icing timer 23 controls the first de-icing unit and the second de-icing unit to alternately supply power according to the first power frequency. When the automatic de-icing mode switch 20 is switched to its second side and powered on, it generates a second power frequency command and sends it to the de-icing timer 23. After receiving the second power frequency command, the de-icing timer 23 controls the first de-icing unit and the second de-icing unit to alternately supply power according to the second power frequency.

[0054] Among them, the remote circuit breaker 1, shunt 2, first relay 3, second relay 4, first diode 5, second diode 6, connector 7, power terminal 8, first copper bar 16, second copper bar 17, de-icing ammeter 18, de-icing manual mode switch 19, de-icing automatic mode switch 20, de-icing connection circuit breaker 21, de-icing control circuit breaker 22, de-icing timer 23, first de-icing brush 24 and second de-icing brush 25 themselves, as well as the corresponding communication connection technology, are existing technologies and will not be described in detail here.

[0055] Example 2:

[0056] This invention discloses a method for de-icing aircraft propellers, based on the system of Embodiment 1, including a de-icing control step. The de-icing control step includes a remote circuit breaker 1 receiving a standby command, sending it to the de-icing control module and allowing the de-icing control module to be powered on, and the de-icing control module receiving the standby command sent by the remote circuit breaker 1, being powered on, and alternately distributing current to one of the two de-icing units.

[0057] The de-icing control process is specifically divided into manual de-icing and automatic de-icing.

[0058] Manual de-icing steps:

[0059] When the de-icing circuit breaker 21 is detected as pressed and turns on, it generates a standby command, sends it to the remote circuit breaker 1, and allows the remote circuit breaker 1 to be powered on. When the remote circuit breaker 1 receives the standby command, it operates and allows all relays to be powered on. When the de-icing control circuit breaker 22 is detected as pressed and turns on, it generates a start command and sends it to the automatic de-icing mode switch 20. When the automatic de-icing mode switch 20 receives the start command, it is powered on. When the automatic de-icing mode switch 20 is detected as being toggled to its third side, the manual de-icing mode switch 19 is detected as being toggled to its first side and is powered on, it generates a first working command and sends it to the first relay 3. When the first relay 3 receives the first working command, it turns on and is used to power the first de-icing unit. When the manual de-icing mode switch 19 is detected as being toggled to its second side and is powered on, it generates a second working command and sends it to the second relay 4. When the second relay 4 receives the second working command, it turns on and is used to power the second de-icing unit.

[0060] Automatic de-icing steps:

[0061] When the automatic de-icing mode switch 20 is detected to be switched to its first side and powered on, a first power frequency command is generated and sent to the de-icing timer 23. After receiving the first power frequency command, the de-icing timer 23 controls the first de-icing unit and the second de-icing unit to alternately supply power according to the first power frequency. When the automatic de-icing mode switch 20 is detected to be switched to its second side and powered on, a second power frequency command is generated and sent to the de-icing timer 23. After receiving the second power frequency command, the de-icing timer 23 controls the first de-icing unit and the second de-icing unit to alternately supply power according to the second power frequency.

[0062] Example 3:

[0063] like Figure 2 As shown, the present invention discloses a system for de-icing aircraft propellers, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of Embodiment 2.

[0064] Example 4:

[0065] like Figure 3 As shown, the present invention discloses a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps in Embodiment 2.

[0066] Compared to the above embodiments, the program module can also be a hardware module made using existing logic operation technology to implement the corresponding logic operation steps, communication steps and control steps, thereby realizing the above-mentioned corresponding steps. The logic operation unit is existing technology and will not be described in detail here.

[0067] The control box that forms the system in this project is a separate device, as described below.

[0068] like Figure 1 As shown, the de-icing control device includes: a remote circuit breaker 1, a shunt 2, a first relay 3 for controlling the inner de-icing sleeve, a second relay 4 for controlling the outer de-icing sleeve, a first diode 5, a second diode 6, a connector 7, a power terminal 8, a first copper strip 16, and a second copper strip 17.

[0069] like Figure 1 As shown, the propeller de-icing control system also includes: a de-icing ammeter 18, a de-icing manual mode switch 19, a de-icing automatic mode switch 20, a de-icing circuit breaker 21, a de-icing control circuit breaker 22, a de-icing timer 23, a first de-icing brush 24, and a second de-icing brush 25.

[0070] First de-icing control device:

[0071] like Figure 4 As shown, the first de-icing control device includes a de-icing control module for alternately distributing energy to two de-icing units. The de-icing control module includes a controller and a drive unit. The controller includes a remote circuit breaker, and the drive unit is a relay, including a first relay and a second relay. The de-icing units include a first de-icing unit and a second de-icing unit. The output terminal of the remote circuit breaker is electrically connected to the first relay, and the output terminal of the remote circuit breaker is electrically connected to the second relay. The controller controls each drive unit to work in turn, and each drive unit controls the energy output to power a corresponding de-icing unit.

[0072] The remote circuit breaker, the first relay, and the second relay form the first de-icing control hardware module. The first de-icing control module includes the first de-icing control hardware module, which is a combination of hardware units.

[0073] Instructions for use of the first de-icing control device:

[0074] Connect the remote circuit breaker's contact 3 to the ground via de-icing, connect the control terminal of the first relay to the positive power supply via a switch, and connect the control terminal of the second relay to the positive power supply via a switch.

[0075] Both the first and second de-icing units are heaters. The first relay is electrically connected to the first de-icing unit, and the second relay is electrically connected to the second de-icing unit.

[0076] The remote circuit breaker, relay, de-icing unit, and switch itself, as well as the corresponding communication connection technology, are existing technologies and will not be described in detail here.

[0077] When the de-icing circuit breaker is pressed, it is turned on. The remote circuit breaker receives the standby command, activates, and allows the first and second relays to be energized.

[0078] Pressing the corresponding switch of the first relay will activate the first relay and power it to the first de-icing unit. Pressing the corresponding switch of the second relay will activate the second relay and power it to the second de-icing unit.

[0079] The de-icing control module of the first de-icing control device can alternately distribute current to the two de-icing units.

[0080] The de-icing unit can be fixedly mounted on the aircraft fuselage to reduce the current per unit time and improve de-icing efficiency. Because the first de-icing control device outputs a constant current at any given moment, different time periods apply to different de-icing units, eliminating the need for a large current to power both units simultaneously. Since the two de-icing units receive current and are heated alternately, the ice layer in the corresponding areas of the two units is heated unevenly, making it more prone to breakage.

[0081] In addition, the de-icing unit can be fixedly installed on the wing or propeller, and similar details will not be elaborated further.

[0082] Compared to the first de-icing control device, the relay also includes a third relay, and the de-icing unit also includes a third de-icing unit. The output terminal of the remote circuit breaker is electrically connected to the third relay, and the control terminal of the third relay is connected to the positive terminal of the power supply via a switch. When the de-icing connection circuit breaker is pressed, it conducts, the remote circuit breaker receives a standby command, and the remote circuit breaker operates, allowing the three relays to be energized. Through this de-icing control module, current can be distributed to the three de-icing units in turn, i.e., the first, second, and third relays conduct in turn and cycle, so that current is output and supplied to the first, second, and third de-icing units accordingly. Similarities will not be elaborated further.

[0083] Compared to the first de-icing control device, the relay also includes a third relay and a fourth relay. The de-icing unit also includes a third de-icing unit and a fourth de-icing unit. The output terminal of the remote circuit breaker is electrically connected to the third relay, and the output terminal of the remote circuit breaker is electrically connected to the fourth relay. The control terminal of the third relay is connected to the positive power supply via a switch, and the control terminal of the fourth relay is also connected to the positive power supply via a switch. Pressing the corresponding switches of the first and second relays activates the first and second relays for a first time period, and pressing the corresponding switches of the third and fourth relays activates the third and fourth relays for a second time period. Two relays are activated during different time periods.

[0084] Second de-icing control device:

[0085] The second de-icing control device differs from the first de-icing control device in that it also includes a housing, a diode, and a shunt.

[0086] like Figure 5 As shown, the second de-icing control device includes a de-icing control module, which is used to alternately distribute energy to two de-icing units. The de-icing control module includes a housing and a controller, drive unit, diode, and shunt fixed inside the housing. The housing is used to shield against interference. The controller includes a remote circuit breaker, and the drive unit is a relay. The remote circuit breaker, relay, diode, and shunt are all located inside the housing. The diode is used to protect the drive unit, and the shunt is used to obtain the operating data of the remote circuit breaker and send it to the de-icing ammeter. The controller is used to control each drive unit to work in turn, and each drive unit is used to control the energy output and supply energy to a corresponding de-icing unit.

[0087] The relay includes a first relay and a second relay; the de-icing unit includes a first de-icing unit and a second de-icing unit; the diode includes a first diode and a second diode; the output terminal of the remote circuit breaker is electrically connected to the first relay; the output terminal of the remote circuit breaker is electrically connected to the second relay; the remote circuit breaker is electrically connected to the shunt; the first diode is electrically connected between the first input terminal and the second input terminal of the first relay; and the second diode is electrically connected between the first input terminal and the second input terminal of the second relay.

[0088] The remote circuit breaker, the first relay, the second relay, the first diode, the second diode, and the shunt form the second de-icing control hardware module. The first de-icing control module includes the second de-icing control hardware module, and the first de-icing control module is a combination of hardware units.

[0089] Instructions for use of the second de-icing control device:

[0090] like Figure 1As shown, the second de-icing control device, de-icing ammeter 18, de-icing manual mode switch 19, de-icing automatic mode switch 20, de-icing circuit breaker 21, de-icing control circuit breaker 22, de-icing timer 23, first de-icing brush 24 and second de-icing brush 25 are connected to form a de-icing control system.

[0091] The de-icing sleeve includes a first de-icing sleeve and a second de-icing sleeve. The first de-icing sleeve is fixed inside the propeller, and the second de-icing sleeve is fixed outside the propeller. The first de-icing sleeve is connected to a conductive slip ring, and the second de-icing sleeve is also connected to a conductive slip ring.

[0092] For methods of de-icing control, please refer to the working process description below.

[0093] Third de-icing control device:

[0094] like Figure 6 As shown, the third de-icing control device includes a de-icing control module, which is used to alternately distribute energy to the two de-icing units. The de-icing control module includes a controller and a drive unit. The drive unit is a relay, which includes a first relay and a second relay. The de-icing unit includes a first de-icing unit and a second de-icing unit. The controller is a microcontroller, which is electrically connected to each relay individually through an adapter unit. The microcontroller is used to control each drive unit to work in turn, and each drive unit is used to control the current output and supply it to the corresponding de-icing unit.

[0095] The microcontroller, the first relay, and the second relay form the third de-icing control hardware module. The first de-icing control module includes the third de-icing control hardware module, and the first de-icing control module is a combination of hardware units.

[0096] The microcontroller, relays, and de-icing unit themselves, as well as the corresponding communication connection technologies, are existing technologies and will not be described in detail here.

[0097] Instructions for use of the third de-icing control device:

[0098] The microcontroller runs a second de-icing control module, which is a program module.

[0099] The microcontroller receives the allocation instruction and sends the first working instruction to the first relay. After receiving the first working instruction, the first relay turns on and supplies power to the first de-icing unit. After a first working time delay, the microcontroller sends the first pause instruction to the first relay. After receiving the first pause instruction, the first relay turns off and supplies power to the first de-icing unit. The microcontroller then sends the second working instruction to the second relay. After receiving the second working instruction, the second relay turns on and supplies power to the second de-icing unit. After a second working time delay, the microcontroller sends the second pause instruction to the second relay. After receiving the second pause instruction, the second relay turns off and supplies power to the second de-icing unit.

[0100] Compared to the aforementioned de-icing control device, the drive unit can also be a solenoid valve, including a first solenoid valve and a second solenoid valve. The de-icing unit is a pneumatic de-icing unit, including a first de-icing unit and a second de-icing unit. The output terminal of the microcontroller is electrically connected to the first solenoid valve and the second solenoid valve. The microcontroller is used to control each drive unit to work in turn. Each drive unit is used to control the airflow output and supply it to a corresponding de-icing unit, that is, to control the alternating output of vacuum and pressure. The microcontroller, solenoid valve, and pneumatic de-icing unit themselves, as well as the corresponding communication connection technology, are existing technologies and will not be described in detail here.

[0101] Compared to the aforementioned de-icing control device, the drive unit can also be a pneumatic valve. The solenoid valve includes a first pneumatic valve and a second pneumatic valve. The de-icing unit is a unit for pneumatic de-icing, including a first de-icing unit and a second de-icing unit. The microcontroller's output is electrically connected to both the first and second pneumatic valves. The microcontroller controls each drive unit to work in turn. Each drive unit controls the airflow output to power a corresponding de-icing unit, i.e., controlling the alternating output of vacuum and pressure. The microcontroller, pneumatic valves, and pneumatic de-icing units themselves, as well as the corresponding communication connection technology, are existing technologies and will not be described in detail here.

[0102] Project technology development process:

[0103] In the design of general aviation aircraft propeller de-icing systems, each propeller blade has a protective sleeve for an electrically heated element attached to its leading edge. Each sleeve is divided into two heating elements: an inner and an outer one. Therefore, the de-icing mode of the blade is divided into inner and outer modes. Because de-icing consumes a large amount of power, if the power supply for inner and outer de-icing is directly controlled by a circuit breaker, it would not only require laying long-distance, high-current wires, increasing the risk of electromagnetic interference, but also would not effectively control the working time of inner and outer de-icing. Therefore, it is necessary to design a propeller de-icing control box that can control the orderly operation of inner and outer de-icing while protecting the de-icing system.

[0104] Research and development objectives:

[0105] The general aviation aircraft is equipped with a propeller de-icing system. Each propeller blade has a protective sleeve for an electrically heated element attached to its leading edge, approximately one-third the length of the inner blade. Each sleeve is divided into two heating elements: an inner and an outer one. Behind the propeller hub septum is a conductive slip ring with three copper rails. The outer ring powers the outer sleeve, the middle ring powers the inner sleeve, and the inner ring provides a grounding circuit for both sleeves. Power and grounding are supplied to the conductive slip ring via two brushes, one on each side of the front of the engine. These brushes have spring-loaded contacts on the slip ring that transmit power to it.

[0106] Because the de-icing sleeve of the propeller blade consumes a large amount of power, in order to control the inner and outer de-icing sleeves of the propeller blade to work in an orderly manner, protect the de-icing system equipment, reduce the laying of high-current wires, and reduce electromagnetic interference, this research and development project provides a propeller de-icing control box with high reliability and safety and easy maintenance.

[0107] The technical solution developed in this project is as follows: The propeller de-icing control box consists of a housing, terminals and connectors on the housing, copper strips, relays, shunts, diodes and remote control circuit breakers inside the housing.

[0108] The shell is composed of aluminum material and phenolic laminate fabric. The aluminum material has an anti-oxidation coating, and the aluminum shell has a good shielding effect. The phenolic laminate fabric is made of non-conductive insulating material.

[0109] The terminals are metal cylinders with external threads and corresponding nuts. Some terminals are connected by copper strips inside the housing. The terminals and connectors are located on the outside of the phenolic board housing.

[0110] The shunt is used to measure the current when the blade de-icing sleeve is working.

[0111] The two relays are normally open relays, which control the operation of the inner or outer de-icing sleeve on the propeller blades, respectively.

[0112] Two diodes are connected in parallel between the relay coil pins to prevent sudden changes in voltage and current and to provide a path for the relay inductor coil to release reverse current.

[0113] The remote circuit breaker has a rated current of 70A and provides overvoltage protection for the de-icing control box. It is controlled by the de-icing circuit breaker in the cockpit. The de-icing circuit breaker has an operating current of 0.5A, which avoids laying high-current wires in the cockpit.

[0114] Technical solution description:

[0115] like Figure 1The diagram shows the working principle block diagram of the propeller de-icing control box of this invention connected to the propeller de-icing system of a certain type of aircraft. In the diagram, the propeller de-icing control box includes: 1-remote circuit breaker, 2-shunt, 3-relay 1, 4-relay 2, 5-diode 1, 6-diode 2, 7-connector, 8-terminal POWER, 9-terminal BB 1C, 10-terminal BB 1B, 11-terminal BB 1, 12-terminal BB 3, 13-terminal BB 2, 14-terminal BB 2B, 15-terminal BB 2C, 16-copper strip 1, 17-copper strip 2.

[0116] The propeller de-icing control system also includes: 18-de-icing ammeter, 19-de-icing manual mode switch, 20-de-icing automatic mode switch, 21-de-icing circuit breaker, 22-de-icing control circuit breaker, 23-de-icing timer, 24-de-icing brush 1, 25-de-icing brush 2.

[0117] Among them, 3-relay 1, i.e., the first relay, is responsible for controlling the inner de-icing sleeve; 4-relay 2, i.e., the second relay, is responsible for controlling the outer de-icing sleeve; 5-diode 1, i.e., the first diode; 6-diode 2, i.e., the second diode; 16-copper strip 1, i.e., the first copper strip; 17-copper strip 2, i.e., the second copper strip.

[0118] Among them, 19-De-icing manual mode switch, i.e., selection switch, is a three-position switch with three states: inner, closed, and outer; 20-De-icing automatic mode switch, is a three-position switch with three states: fast, slow, and closed; 21-De-icing circuit breaker, operating current 0.5A; 22-De-icing control circuit breaker, operating current 2A; 24-De-icing brush 1, i.e., the first de-icing brush; 25-De-icing brush 2, i.e., the second de-icing brush.

[0119] Component connection relationship description:

[0120] like Figure 1The diagram shown is a block diagram illustrating the working principle of the propeller de-icing control box connected to the propeller de-icing system of a certain type of aircraft. In this implementation, the propeller de-icing control box housing is composed of aluminum material and phenolic laminated fabric. Terminals 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, and 7 (connector) are arranged on the phenolic laminated fabric. The terminals are 8mm diameter externally threaded metal cylinders, totaling eight terminals. The copper strips are located inside the housing; copper strip 16 connects terminals 9, 10, and 11, and copper strip 17 connects terminals 13, 14, and 15. The remote circuit breaker, shunt, relay, relays 3 and 4, diode, diode, and connector are readily available off-the-shelf products. Connected by cables, the pilot can control the orderly operation of the inner and outer de-icing sleeves of the propeller blades by controlling the de-icing switch.

[0121] Work process description:

[0122] During normal operation, the pilot activates the 22-de-icing control circuit breaker, connecting pins 1 and 5 of the 18-de-icing ammeter to power, energizing the de-icing ammeter. The pilot then activates the 21-de-icing connection circuit breaker, connecting the 8-terminal POWER of the de-icing control box to the onboard power supply. The 1-remote control circuit breaker is activated by the 21-de-icing connection circuit breaker. Contact 3 within the 1-remote control circuit breaker is grounded, and contacts A1 and A2 are connected. Current flows through the 2-shunt, and the current value during de-icing jacket operation is transmitted via cables from both ends of the shunt to pins 2 and 3 of the 7-connector to the 18-de-icing ammeter. The de-icing ammeter continuously monitors the operating current of the de-icing jacket; the normal operating current should be between 47A and 54A. After passing through the shunt, the current is transmitted via cable to the 12-terminal BB3, which connects to pin 5 of the de-icing timer, powering the de-icing timer. The pilot sets the 19-de-icing manual mode switch to the inner position, i.e., contact 2 connects to contact 3. The pilot sets the 20-de-icing automatic mode switch to the off position, i.e., contact 2 connects to contact 1 and contact 5 connects to contact 4. Through pin 4 of connector 7, the coil contacts X1 and X2 of relay 3, which is responsible for the inner de-icing sleeve in the de-icing control box, are connected. Contact A2 is energized and connected to A1, supplying airborne power to copper bar 16. Terminal 9 BB 1C connects to the middle contact B of de-icing brush 25. Terminal 10 BB 1B connects to the middle contact B of de-icing brush 124. The brush contacts transmit electrical energy from the de-icing control box to the middle slip ring through contact with the middle slip ring, thereby controlling the operation of the inner de-icing sleeve of the propeller blade.

[0123] The pilot sets the 19-de-icing manual mode switch to the outer position, i.e., contact 2 connects to contact 1. The pilot sets the 20-de-icing automatic mode switch to the off position, i.e., contact 2 connects to contact 1, and contact 5 connects to contact 4. Through pin 5 of connector 7, the coil contacts X1 and X2 of relay 4, which is responsible for the outer de-icing sleeve in the de-icing control box, are connected. Contact A2 is energized and connected to A1, supplying airborne power to copper bar 17. Terminal 15 BB 2C connects to the outer contact A of de-icing brush 25. Terminal 14 BB 2B connects to the outer contact A of de-icing brush 14. The brush contacts transmit electrical energy from the de-icing control box to the outer slip ring through contact with the outer slip ring, thereby controlling the operation of the outer de-icing sleeve of the propeller blade.

[0124] The above describes the manual selection of the propeller blade inner or outer de-icing working mode.

[0125] The following is an automatic de-icing mode in which the inner and outer sides of the propeller blades alternate between de-icing.

[0126] The pilot sets the 19-de-icing manual mode switch to the off position, meaning contact 2 is not connected to contact 1 and contact 3. The pilot sets the 20-de-icing automatic mode switch to the fast position, meaning contact 2 is connected to contact 3 and contact 5 is connected to contact 6. This connects pins 2 and 3 of the 23-de-icing timer. After calculation by the de-icing timer, in fast mode, the timer will be responsible for starting the inner de-icing sleeve for 45 seconds. Pin 6 of the timer is connected to terminal 11 BB 1, supplying power to copper bar 16. Copper bar supplies power to terminal 9 BB 1C and terminal 10 BB 1B. Terminal 9 BB 1C is connected to the middle contact B of de-icing brush 25, and terminal 10 BB 1B is connected to the middle contact B of de-icing brush 14. The brush contacts transmit power from the de-icing control box to the middle slip ring through contact with the middle slip ring, thereby controlling the inner de-icing sleeve of the propeller blade to work for 45 seconds. Then, the outer de-icing sleeve restarts for 45 seconds. Pin 4 of the timer connects to terminal BB 2 (13), supplying power to copper bar (17). Copper bar then supplies power to terminals BB 2C (15) and BB 2B (14). Terminal BB 2C (15) connects to the outer contact A of de-icing brush 2 (25), and terminal BB 2B (14) connects to the outer contact A of de-icing brush 1 (24). The brush contacts transmit power from the de-icing control box to the outer slip ring, thus controlling the outer de-icing sleeve of the blade to operate for 45 seconds. Finally, both the inner and outer de-icing sleeves shut down simultaneously for 90 seconds.

[0127] The pilot sets the 19-De-icing Manual Mode switch to the off position, meaning contact 2 is not connected to contact 1 and contact 3. The pilot sets the 20-De-icing Automatic Mode switch to the slow position, meaning contact 2 is connected to contact 3 and contact 5 is connected to contact 4. This connects pin 2 of the 23-De-icing Timer. After calculation by the de-icing timer, in slow mode, the inner de-icing sleeve starts for 90 seconds, and then the outer de-icing sleeve starts for another 90 seconds. The timer switches between the inner and outer de-icing sleeves every 90 seconds.

[0128] Furthermore, the de-icing control box can be adapted to meet the actual needs of the de-icing system, thereby reducing aircraft production costs to a greater extent. This control system can also be modified to suit different propeller models, meeting their usage requirements and demonstrating significant potential for widespread application. This application has already been applied to general aviation aircraft equipped with turboprop engines, achieving positive results.

[0129] The concept of this application:

[0130] In existing technologies, most de-icing control devices employ intermittent energy output to the de-icing unit to achieve de-icing control. For example, patent announcement number CN1012427B, entitled "De-icing Control System," utilizes a simplified device to alternately apply vacuum and pressure to the de-icing unit, allowing these units to operate with minimal compressed air without considering pressure.

[0131] The inventive concept of this application is as follows:

[0132] First, energy is distributed in rotation to a portion of the multiple de-icing units.

[0133] Secondly, it is used to reduce the current per unit time and improve de-icing efficiency.

[0134] The differences are explained below:

[0135] In the prior art, the controller controls the driver to output energy intermittently. The energy is output intermittently, such as pulsed current, vacuum state and pressure, and the output energy can be in the form of voltage, current or air pressure.

[0136] In the technical concept of this application, the energy output is not abrupt, and it is not intermittent. Compared with the existing technical solutions, the energy output of the technical solution of this application is relatively stable or has only slight fluctuations. The output energy is distributed to some of the multiple de-icing units in turn according to the time flow to reduce the current per unit time and improve the de-icing efficiency.

[0137] The energy output is relatively stable, which can be simply understood as a constant current source. Small fluctuations in output power may be due to interference or operational instability. That is, the energy output device in this application may or may not be a constant current source. This differs from the abrupt or significantly different output states in existing technologies.

[0138] The advantages of this application are:

[0139] The two relays in this application's de-icing control box allow for manual switching between the inner and outer de-icing sleeves of the propeller blades. A shunt provides current readings to the de-icing ammeter, continuously monitoring the de-icing system's operational status. A remote circuit breaker provides overvoltage protection for the de-icing control box, controlled by a de-icing circuit breaker in the cockpit, with an operating current of 0.5A. The design of the de-icing control box reduces the laying of high-current wires and electromagnetic interference. Furthermore, it protects the de-icing system, is easy to maintain, and improves the maintainability and reliability of the aircraft propeller de-icing system. The relays, shunts, diodes, remote circuit breakers, and connectors used in the de-icing control box are all mature off-the-shelf products, making procurement convenient. Additionally, the de-icing control box can be adapted and modified to meet specific de-icing needs, thus reducing aircraft production costs to some extent.

Claims

1. A system for de-icing of aircraft propellers, characterized by: The system includes a de-icing control module for alternately distributing energy to two de-icing units. The de-icing control module comprises a controller, a drive unit, a shunt, a de-icing ammeter, a first de-icing brush, a second de-icing brush, and a de-icing control program module. The controller includes a remote circuit breaker, a manual de-icing mode switch, an automatic de-icing mode switch, a de-icing connection circuit breaker, a de-icing control circuit breaker, and a de-icing timer. The de-icing units include a first de-icing unit and a second de-icing unit. The first de-icing unit is a first de-icing sleeve, and the second de-icing unit is a second de-icing sleeve. The first de-icing sleeve is located inside the propeller, and the second de-icing sleeve is located outside the propeller. Both de-icing sleeves are powered via conductive slip rings. The drive unit includes... Includes a first relay for controlling the inner de-icing sleeve and a second relay for controlling the outer de-icing sleeve; a remote circuit breaker is connected to each relay, the remote circuit breaker is electrically connected to a shunt, a de-icing ammeter is electrically connected to the shunt, a de-icing control circuit breaker is electrically connected to an automatic de-icing mode switch, the automatic de-icing mode switch is electrically connected to a manual de-icing mode switch, and the automatic de-icing mode switch is electrically connected to a de-icing timer; the output terminal of the first relay is electrically connected to the first de-icing brush, the output terminal of the first relay is electrically connected to the second de-icing brush, and the output terminal of the first relay is electrically connected to the de-icing timer; the output terminal of the second relay is electrically connected to the first de-icing brush, and the output terminal of the second relay is electrically connected to the second de-icing brush. The output terminal is electrically connected to the de-icing timer; the de-icing control program module is used to detect when the de-icing circuit breaker is pressed and conduct, generate a standby command, send it to the remote circuit breaker, and allow the remote circuit breaker to be powered on; the remote circuit breaker receives the standby command, operates, and allows all relays to be powered on, the de-icing control circuit breaker receives the press and conducts, generates a start command and sends it to the automatic de-icing mode switch, the automatic de-icing mode switch receives the start command and is powered on; the automatic de-icing mode switch receives the switch to its third side (closed position), the manual de-icing mode switch receives the switch to its first side and conducts power, generates a first working command and sends it to the first relay, the first relay receives the first working command and conducts to supply power to the first de-icing... The ice unit is powered; when the manual de-icing mode switch is detected to be toggled to its second side and powered on, a second working command is generated and sent to the second relay. After receiving the second working command, the second relay is powered on and used to power the second de-icing unit; when the automatic de-icing mode switch is detected to be toggled to its first side and powered on, a first power frequency command is generated and sent to the de-icing timer. After receiving the first power frequency command, the de-icing timer controls the first and second de-icing units to alternately power on according to the first power frequency; when the automatic de-icing mode switch is detected to be toggled to its second side and powered on, a second power frequency command is generated and sent to the de-icing timer. After receiving the second power frequency command, the de-icing timer controls the first and second de-icing units to alternately power on according to the second power frequency.

2. A system for de-icing aircraft propellers according to claim 1, characterized in that: It also includes a housing, with the drive unit located inside the housing, which is used to shield against interference; it also includes a diode, which is electrically connected to the drive unit and is used to protect the drive unit.

3. A method for de-icing aircraft propellers, characterized in that: A system for de-icing aircraft propellers according to claim 1 includes a de-icing control step, which includes a remote circuit breaker receiving a standby command, sending it to the de-icing control module and allowing the de-icing control module to be powered on, and the de-icing control module receiving the standby command from the remote circuit breaker, being powered on, and distributing energy to each de-icing unit in turn.

4. A method for de-icing an aircraft propeller as defined in claim 3, characterized in that: The de-icing control steps specifically include the following steps: The de-icing circuit breaker, upon receiving the press, becomes active, generating a standby command, which is sent to the remote circuit breaker, allowing the remote circuit breaker to power on; the remote circuit breaker receives the standby command, operates, and allows all relays to power on; the de-icing control circuit breaker, upon receiving the press, becomes active, generating a start command, which is sent to the automatic de-icing mode switch; the automatic de-icing mode switch, upon receiving the start command, becomes active; the automatic de-icing mode switch, upon receiving the switch to its third side (closed position), and the manual de-icing mode switch, upon receiving the switch to its first side, becomes active, generating a first working command, which is sent to the first relay; the first relay, upon receiving the first working command, becomes active and supplies power to the first de-icing unit. Electricity; when the manual de-icing mode switch is detected to be toggled to its second side and powered on, a second working command is generated and sent to the second relay. After receiving the second working command, the second relay is powered on and used to supply power to the second de-icing unit; when the automatic de-icing mode switch is detected to be toggled to its first side and powered on, a first power frequency command is generated and sent to the de-icing timer. After receiving the first power frequency command, the de-icing timer controls the first and second de-icing units to alternately supply power according to the first power frequency; when the automatic de-icing mode switch is detected to be toggled to its second side and powered on, a second power frequency command is generated and sent to the de-icing timer. After receiving the second power frequency command, the de-icing timer controls the first and second de-icing units to alternately supply power according to the second power frequency.

5. A computer readable storage medium storing a computer program, characterized in that: When the computer program is executed by the processor, it performs the corresponding steps in claim 3 or 4.

Images