Instant heating system for hidden door handle of automobile

Abstract

The invention belongs to the technical field of automobile parts, and discloses an automobile hidden door handle instant heating system which comprises an electric heating unit integrated in an inner cavity of a hidden door handle, and the electric heating unit comprises a metal heating body and a power supply connecting copper sheet; the internal temperature sensor is fixed on the inner wall of the hidden door handle and monitors the internal temperature of the handle in real time; the environment detection module comprises an external temperature sensor and a humidity sensor and is used for collecting external environment temperature and humidity data; the control unit is in communication connection with a vehicle CAN bus and used for receiving a vehicle door unlocking signal and dynamically controlling starting, stopping and power output of the electric heating unit according to detection data of the environment detection module and the inner temperature sensor. The hidden door handle overcomes the functional defects of a hidden door handle in an extreme environment, has the characteristics of high efficiency, energy conservation and user friendliness, and is suitable for high-end electric and intelligent vehicle models.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and more particularly to an instant heating system for an automobile hidden door handle. Background Art

[0002] With the continuous evolution of automotive design, concealed door handles have gradually become a mainstream feature due to their aesthetics, low wind resistance, and technological appeal. However, in cold or high-humidity environments, concealed door handles can easily become blocked due to ice, snow, or frozen condensation, seriously affecting the user experience and even driving safety. Traditional solutions (such as mechanical anti-icing or manual de-icing) are inefficient and rely on manual intervention. Existing electric heating technologies mostly use constant power heating, lack environmental adaptability, and can result in energy waste or insufficient heating.

[0003] Furthermore, existing door handle heating systems are typically independent of the vehicle's control system, unable to respond to environmental changes or user needs in real time, and lack mechanisms to optimize energy consumption. Therefore, there is an urgent need for an intelligent, instant heating system for concealed automotive door handles that can dynamically adjust heating strategies while balancing reliability, energy efficiency, and integrated control. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an automobile hidden door handle instant heating system.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] Automobile hidden door handle instant heating system, including:

[0007] An electric heating unit is integrated into the inner cavity of the hidden door handle, and the electric heating unit includes a metal heating body and a power supply connection copper sheet;

[0008] Internal temperature sensor, fixed to the inner wall of the hidden door handle, monitors the internal temperature of the handle in real time;

[0009] Environmental detection module, including external temperature sensor and humidity sensor, used to collect temperature and humidity data of the external environment;

[0010] A control unit is connected to the vehicle CAN bus for receiving a door unlock signal and dynamically controlling the start and stop and power output of the electric heating unit based on detection data from the environment detection module and the internal temperature sensor;

[0011] The power management module provides regulated power to the system and monitors energy consumption.

[0012] As a further solution of the present invention: the surface of the metal heating body is covered with an insulating heat-conducting layer, and the copper sheet is firmly fixed to the metal heating body by welding or screws.

[0013] As a further solution of the present invention: the metal heating body is made of titanium alloy or stainless steel, and the metal heating body is a ring structure and is arranged along the inner edge of the hidden door handle housing.

[0014] As a further solution of the present invention: the insulating heat-conducting layer is an aluminum nitride ceramic coating or a polyimide film, and its thickness is 0.2-0.5 mm.

[0015] As a further solution of the present invention: the control unit includes:

[0016] The signal processing submodule analyzes the door unlocking signal and vehicle status transmitted by the CAN bus;

[0017] The temperature control submodule generates PWM temperature control instructions based on the difference between internal and external temperatures;

[0018] Safety protection submodule monitors system temperature and current parameters in real time.

[0019] As a further solution of the present invention: it also includes a user preset module, which is connected to the control unit signal, and the user preset module allows the heating temperature threshold and advance heating time to be set through the vehicle-mounted central control screen or mobile APP.

[0020] As a further solution of the present invention: the security protection submodule includes:

[0021] Over-temperature protection unit, triggers hard power-off when the internal temperature sensor reading is greater than ℃;

[0022] The current monitoring unit disconnects the relay when a short circuit or leakage current > mA is detected;

[0023] Fault self-diagnosis unit records abnormal events and uploads them to the vehicle ECU.

[0024] Compared with the prior art, the advantages of the present invention are:

[0025] This solution solves the functional defects of hidden door handles in extreme environments through multi-sensor fusion, intelligent temperature control and vehicle collaboration. It is efficient, energy-saving and user-friendly, and is suitable for high-end electric and intelligent vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a system diagram of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the electric heating unit of the present invention;

[0028] Figure 3 Schematic diagram of a control unit of the present invention.

[0029] Description of the numbers in the figure:

[0030] 1. Electric heating unit; 11. Metal heating body; 12. Copper sheet; 13. Insulating heat-conducting layer; 2. Internal temperature sensor; 3. Environmental detection module; 31. External temperature sensor; 32. Humidity sensor; 4. Control unit; 41. Signal processing submodule; 42. Temperature control submodule; 43. Safety protection submodule; 431. Overtemperature protection unit; 432. Current monitoring unit; 433. Fault self-diagnosis unit; 5. Power management module; 6. User preset module. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] Example 1

[0033] See also Figure 1-3 The automobile hidden door handle instant heating system includes: an electric heating unit 1, an internal temperature sensor 2, an environment detection module 3, a control unit 4 and a power management module 5.

[0034] The electric heating unit 1 is integrated into the inner cavity of the hidden door handle and includes a metal heating body 11 and a power supply connection copper sheet 12. The internal temperature sensor 2 is fixed to the inner wall of the hidden door handle to monitor the internal temperature of the handle in real time.

[0035] In this embodiment, the electric heating unit 1 is directly integrated into the door handle cavity. The metal heating body 11 and the copper sheet 12 ensure efficient thermal conductivity and durability. The embedded sensor layout avoids structural interference and improves system stability.

[0036] Among them, the surface of the metal heating body 11 is covered with an insulating heat-conducting layer 13, and the copper sheet 12 is firmly fixed to the metal heating body 11 by welding or screws to ensure that the thermal resistance is minimized. The metal heating body 11 is made of titanium alloy or stainless steel, and the titanium alloy / stainless steel matrix is ​​corrosion-resistant. The metal heating body 11 is an annular structure and is arranged along the inner edge of the hidden door handle shell to achieve uniform heating and avoid local overheating. The insulating heat-conducting layer 13 is an aluminum nitride ceramic coating or a polyimide film with a thickness of 0.2-0.5mm. The insulating heat-conducting layer 13 takes into account both insulation and efficient heat conduction (the thermal conductivity of aluminum nitride ceramics is ≈180W / mK).

[0037] The environmental detection module 3 includes an external temperature sensor 31 and a humidity sensor 32, which are used to collect data on the ambient temperature and humidity outside the vehicle. The control unit 4 is connected to the vehicle's CAN bus and receives the vehicle's proximity signal (triggered by the Bluetooth key / RFID) via the CAN bus. The control unit 4 receives the door unlock signal and dynamically controls the start and stop of the electric heating unit 1 and its power output based on the detection data from the environmental detection module 3 and the internal temperature sensor 2. The power management module 5 provides a regulated power supply for the system and monitors energy consumption. The control unit 4 adjusts the output power of the electric heating unit 1 in stages based on actual needs (e.g., high power for low temperatures, low power for slightly frozen conditions), significantly reducing ineffective energy consumption and extending the vehicle's battery life.

[0038] In addition, the control unit 4 further cooperates with the vehicle body domain controller to automatically increase the heating power by 20% and activate the vibration de-icing function when three consecutive unlocking failures are detected.

[0039] In this embodiment, through the synergistic effect of the internal temperature sensor 2 and the environmental detection module 3, the system monitors the temperature and humidity inside and outside the handle in real time, and dynamically adjusts the heating power and duration in combination with the vehicle CAN bus signal to ensure rapid defrosting while avoiding energy waste. The CAN bus linkage function can start preheating in advance when the vehicle is pre-unlocked (the user-preset time is adjustable from 5 to 60 seconds).

[0040] Specifically, the control unit 4 includes: a signal processing submodule 41, a temperature control submodule 42, and a temperature control submodule 43. The signal processing submodule 41 analyzes the door unlock signal and vehicle status transmitted by the CAN bus. The temperature control submodule 42 generates a PWM temperature control instruction based on the difference between the internal and external temperatures. The temperature control submodule 42 executes the following control logic:

[0041] When the external temperature sensor 31 detects that the ambient temperature is ≤5°C and the humidity is ≥70%, the preheating mode is started.

[0042] The safety protection submodule 43 monitors the system temperature and current parameters in real time. The safety protection submodule 43 includes:

[0043] Over-temperature protection unit 431, triggers hard power-off when the reading of internal temperature sensor 2 is greater than 50°C;

[0044] The current monitoring unit 432 disconnects the relay when a short circuit or leakage current > 100 mA is detected;

[0045] The fault self-diagnosis unit 433 records abnormal events and uploads them to the vehicle ECU.

[0046] Based on the above application example 1: automatic heating of door handles in low temperature environment

[0047] When the vehicle is in a cold environment (such as -10°C), the external temperature sensor 31 of the environmental detection module 3 detects the external low temperature, and the humidity sensor 32 monitors the high humidity (such as relative humidity ≥80%). After the control unit 4 receives the door unlocking signal through the CAN bus, it immediately starts the electric heating unit 1.

[0048] The metal heater 11 rapidly heats up to a preset temperature (e.g., 25°C) through PWM voltage regulation. The internal temperature sensor 2 provides real-time temperature data, and the control unit 4 dynamically adjusts the power to ensure the door handle remains frost-free and comfortable to the touch. When the user opens the door, the handle remains at a comfortable temperature, preventing frostbite or slipping.

[0049] Application Example 2: Overheat Protection in High Temperature Environment

[0050] Under intense summer sun, if internal temperature sensor 2 detects a door handle temperature of 45°C, the heating function, which has been pre-set via the vehicle's central control screen, will be automatically disabled. If the temperature rises further to 50°C, overtemperature protection unit 431 in safety protection submodule 43 will forcibly shut off power to prevent overheating and circuit damage. Simultaneously, fault self-diagnosis unit 433 will record the event and send a notification via the CAN bus to the vehicle's screen: "Door handle high temperature, heating suspended."

[0051] Example 2

[0052] Based on the above embodiment, the automobile hidden door handle instant heating system further includes a user preset module 6, which is in communication with the control unit 4 and allows the user preset module 6 to set the heating temperature threshold and advance heating time through the vehicle's central control screen or mobile APP. The user preset module 6 provides:

[0053] The temperature threshold setting interface allows for adjustment in steps from -10°C to +40°C;

[0054] Time strategy settings, including immediate heating, delayed heating and periodic heating modes;

[0055] Energy consumption display unit, showing current and historical power consumption data in real time.

[0056] Application example: User-defined heating strategy

[0057] The user can set up a preheating function via a mobile app: When the vehicle is parked in an environment below -5°C and the Bluetooth key approaches the vehicle (within a 2-meter range), control unit 4 activates electric heating unit 1 10 seconds in advance, warming the door handle to 20°C before the user touches it. Power management module 5 prioritizes the battery's redundant power to avoid affecting vehicle startup.

[0058] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. Automobile hidden door handle instant heating system, characterized by: include: An electric heating unit (1) is integrated into the inner cavity of the hidden door handle, wherein the electric heating unit (1) comprises a metal heating body (11) and a power supply connection copper sheet (12); An internal temperature sensor (2), fixed to the inner wall of the hidden door handle, monitors the internal temperature of the handle in real time; An environment detection module (3), comprising an external temperature sensor (31) and a humidity sensor (32), for collecting temperature and humidity data of the environment outside the vehicle; A control unit (4) is connected to the vehicle CAN bus for communication, and is used to receive a door unlocking signal and dynamically control the start and stop and power output of the electric heating unit (1) based on detection data from the environment detection module (3) and the internal temperature sensor (2); The power management module (5) provides a stable power supply to the system and monitors energy consumption.

2. The automobile hidden door handle instant heating system according to claim 1, characterized in that: The surface of the metal heating body (11) is covered with an insulating heat-conducting layer (13), and the copper sheet (12) is firmly fixed to the metal heating body (11) by welding or screws.

3. The automobile hidden door handle instant heating system according to claim 2, characterized in that: The metal heating body (11) is made of titanium alloy or stainless steel, and is an annular structure and is arranged along the inner edge of the hidden door handle housing.

4. The automobile hidden door handle instant heating system according to claim 2, characterized in that: The insulating heat-conducting layer (13) is an aluminum nitride ceramic coating or a polyimide film, and its thickness is 0.2-0.5 mm.

5. The automobile hidden door handle instant heating system according to claim 1, characterized in that: The control unit (4) comprises: A signal processing submodule (41) analyzes the door unlocking signal and vehicle status transmitted by the CAN bus; A temperature control submodule (42) generates a PWM temperature adjustment instruction based on the difference between the internal and external temperatures; The safety protection submodule (43) monitors the system temperature and current parameters in real time.

6. The automobile hidden door handle instant heating system according to claim 1, characterized in that: It also includes a user preset module (6) connected to the control unit (4) by signal, and the user preset module (6) allows the heating temperature threshold and the advance heating time to be set through the vehicle-mounted central control screen or mobile APP.

7. The instant heating system for automobile hidden door handles according to claim 5, characterized in that: The safety protection submodule (43) comprises: An over-temperature protection unit (431) triggers a hard power-off when the internal temperature sensor (2) reads > 50°C; A current monitoring unit (432) disconnects the relay when a short circuit or leakage current > 100 mA is detected; The fault self-diagnosis unit (433) records abnormal events and uploads them to the vehicle ECU.

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