CN218634617U - HUD thermal management system - Google Patents

Abstract

The embodiment of the application provides a HUD thermal management system, includes: the device comprises a HUD shell, a light source module arranged in the HUD shell and a heat dissipation air duct arranged outside the HUD shell; a ventilation opening is formed in the side wall, close to the light source module, of the HUD shell; one end in heat dissipation wind channel is connected on the vent of HUD shell, and the other end in heat dissipation wind channel is connected on-vehicle air conditioner's the main wind channel. The automatic adjustment of the temperature of the light source module is realized, the problems of overlarge weight and high cost of the HUD caused by the use of metal materials and various heat dissipation materials in the prior art are solved, and the driving safety, comfort and energy conservation are improved.

Description

HUD thermal management system

Technical Field

The embodiment of the application relates to the technical field of vehicles, in particular to a HUD thermal management system.

Background

Head-up display (HUD) is arranged in the place ahead of car instrument as a kind of auxiliary steering instrument generally, receives the influence of factors such as sunlight reflection focus, light source module self generate heat, light source module characteristic, and the heat takes place the gathering easily in HUD's light source module department, if not dispel the heat in time, then very much can lead to the device in the light source module to damage to influence HUD's reliability and life.

In the related art, the rear case or the whole body is designed to be made of all-metal material, and large-area die-casting heat-conducting ribs and heat-radiating holes are arranged, and heat-conducting silica gel sheets are attached to the heating element, so that the thermal contact resistance between the heating element and the radiator is reduced, and the heat-radiating effect is improved.

However, the use of metal materials and various heat dissipation materials has the problem that the HUD has an excessively large weight and a high production cost in the related art.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a HUD thermal management system to the realization improves light source module's performance and life-span to the automatic cooling of light source module position in the HUD, guarantees light source module steady operation, and solves among the prior art because of using the too big and with high costs problem of HUD weight that metal material and various heat radiation material lead to, has improved security, travelling comfort and the energy-conservation nature of driving.

The embodiment of the application provides a HUD thermal management system, includes: the device comprises a HUD shell, a light source module arranged in the HUD shell and a heat dissipation air duct arranged outside the HUD shell;

a ventilation opening is formed in the side wall, close to the light source module, of the HUD shell; one end of the heat dissipation air duct is connected to the vent of the HUD shell, and the other end of the heat dissipation air duct is connected to the main air duct of the vehicle-mounted air conditioner.

Optionally, the system further comprises an onboard controller and air circulation fan disposed outside the HUD housing;

the air circulation fan is arranged in the heat dissipation air duct;

the vehicle-mounted controller is connected with the air circulation fan.

Optionally, the system further comprises an onboard controller and air circulation fan disposed outside the HUD housing;

the air circulation fan comprises fan blades and a motor; the fan blades are connected with a rotor of the motor;

the fan blades are arranged in the heat dissipation air duct, and the motor is arranged outside the heat dissipation air duct;

the vehicle-mounted controller is connected with the motor.

Optionally, the system further comprises: a first temperature sensor and a second temperature sensor;

the first temperature sensor is arranged in the HUD shell, and the second temperature sensor is arranged in the heat dissipation air duct;

the first temperature sensor is used for collecting the light source temperature of the light source module;

the second temperature sensor is used for collecting the ambient temperature in the heat dissipation air duct;

the vehicle-mounted controller is respectively connected with the first temperature sensor and the second temperature sensor;

the vehicle-mounted controller is used for controlling the rotating speed and/or the direction of the air circulation fan according to the temperature values acquired by the first temperature sensor and the second temperature sensor.

Optionally, the system further includes an optical reflection module and an optical path adjusting device, the optical reflection module and the optical path adjusting device are both disposed in the HUD housing, and the optical path adjusting device is connected to the optical reflection module and the onboard controller respectively; the vehicle-mounted controller is used for adjusting the light reflection direction of the optical reflection module through the light path adjusting device.

Optionally, the optical reflection module includes a first reflecting mirror and a second reflecting mirror, and the optical path adjusting device is configured to adjust a relative position between the first reflecting mirror and the second reflecting mirror, so that the first reflecting mirror and the second reflecting mirror are spatially staggered by a preset included angle.

Optionally, the vehicle-mounted controller is further connected to the light source module, and the vehicle-mounted controller is further configured to control the light source module to be turned off or turned on according to a light source temperature of the light source module.

Optionally, the light source module includes a light source control unit and an image display unit, the vehicle-mounted controller is connected to the light source control unit, and the image display unit is connected to the light source control unit.

Optionally, the system further comprises an alarm module, and the alarm module is arranged outside the HUD housing; the alarm module is connected with the vehicle-mounted controller;

the vehicle-mounted controller is also used for controlling the alarm module to give an alarm according to the light source temperature of the light source module.

Optionally, a plurality of louvres have still been seted up on the HUD shell.

The HUD thermal management system that this application embodiment provided includes: the LED lamp comprises a HUD shell, a light source module arranged in the HUD shell and a heat dissipation air duct arranged outside the HUD shell; a ventilation opening is formed in the side wall, close to the light source module, of the HUD shell; one end of the heat dissipation air duct is connected to the vent of the HUD shell, and the other end of the heat dissipation air duct is connected to the main air duct of the vehicle-mounted air conditioner. The automatic adjustment of the temperature of the light source module is realized, the problems of overlarge weight and high cost of the HUD caused by the use of metal materials and various heat dissipation materials in the prior art are solved, and the driving safety, comfort and energy conservation are improved.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present application, nor do they limit the scope of the present application. Other features of the present application will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a HUD thermal management system according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a HUD thermal management system according to the second embodiment of the present application;

FIG. 3 is a schematic structural view of another HUD thermal management system provided in accordance with example two of the present application;

fig. 4 is a schematic flowchart of a control logic of an on-board controller according to a third embodiment of the present application;

fig. 5 is a logic diagram of a light source protection strategy according to a third embodiment of the present application.

Description of reference numerals:

100-a HUD thermal management system;

1-a light source module;

2-a heat dissipation air duct;

3-HUD shell;

4-vehicle air conditioner;

5-heat dissipation holes;

6-air circulation fan;

61-fan blades;

62-a motor;

7-an onboard controller;

8-a first temperature sensor;

9-a second temperature sensor;

10-an optical reflection module;

11-optical path adjusting device.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

HUD is vehicle-mounted head-up display promptly, utilizes the optics reflection principle, by light source module with speeding early warning, vehicle condition control, oil consumption, speed per hour, prevent to knock into the back, navigation guide and road surface information etc. driving information, through adjustable optics reflection module, projects and the place ahead of driver's parallel sight to reduce the operation that the driver looked the instrument low-head, thereby improve driving safety. However, the HUD is generally arranged in front of an instrument of a vehicle, is completely exposed to sunlight, and is affected by factors such as heat generated during sunlight direct radiation, sunlight reflected and focused through a windshield and the work of the light source module, the light source module usually works under a high-temperature environment, and the heat dissipation performance of the HUD is improved for ensuring that optical components inside the light source module and electronic elements in the HUD are not damaged by high temperature.

In the prior art, the rear shell or the whole body is designed to be made of all-metal materials, large-area die-casting heat conduction ribs and heat dissipation holes are arranged, and heat conduction silica gel sheets and the like are pasted on the heating element, so that the thermal contact resistance between the heating element and the radiator is reduced, and the heat dissipation performance of the HUD is improved. However, the following problems exist in the prior art: (1) The product weight is too large by adopting the metal design, and the light weight design trend and the requirement of the whole vehicle and parts at present can not be met; (2) The use of metal materials and other heat dissipation materials increases the cost of the HUD; (3) The related art cannot completely solve the problem of heat accumulation of the light source module caused by the focusing of sunlight.

Based on the technical problem that exists among the prior art, this application embodiment has provided a HUD thermal management system, through set up a branch wind channel on vehicle-mounted air conditioner's main wind channel, the wind channel that dispels the heat promptly to connect the other end in wind channel that dispels the heat on the HUD near light source module's HUD shell, because this scheme directly cools down light source module with the help of the air circulation system on the vehicle, compare with prior art, not only alleviateed HUD's weight, still practiced thrift HUD's manufacturing cost. Furthermore, for improving the heat dissipation effect, an air circulation fan can be further arranged in the heat dissipation air channel, and the rotating speed and the direction of the air circulation fan are controlled through the vehicle-mounted controller according to needs, so that the air in the air circulation system is guided and accelerated, heat generated when the light source module operates is quickly conducted to the air, and the cooling of the light source module is accelerated. Here, still can set up light path adjusting device for optical reflection module in the HUD to set up on-vehicle controller and be connected with light path adjusting device, adjust optical reflection module through controlling light path adjusting device, thereby remove the focus, fundamentally has solved the too high problem of light source module temperature because the sunlight is focused and is caused.

Example one

Fig. 1 is a schematic structural diagram of a HUD thermal management system according to an embodiment of the present disclosure, and as shown in fig. 1, a HUD thermal management system 100 in this embodiment includes: light source module 1, heat dissipation channel 2 and HUD shell 3.

Wherein, light source module 1 is located HUD shell 3, and heat dissipation channel 2 is located outside HUD shell 3.

A ventilation opening is formed in the side wall, close to the light source module 1, of the HUD shell 3; one end of the heat dissipation air duct 2 is connected to the vent of the HUD shell 3, and the other end of the heat dissipation air duct 2 is connected to the main air duct of the vehicle-mounted air conditioner 4.

Because the heat dissipation air duct 2 is connected with the main air duct of the vehicle-mounted air conditioner 4, the main air duct of the vehicle-mounted air conditioner 4 is connected with the air circulation system of the vehicle, and the HUD operates at a temperature far higher than the ambient temperature, when the vehicle-mounted air conditioner 4 is turned on (mainly blowing cold air), the air-conditioned air can be used for cooling the light source module 1, and when the vehicle-mounted air conditioner 4 is turned off, the external air temperature can be used for cooling the light source module 1.

Optionally, as shown in fig. 1, a plurality of heat dissipation holes 5 are further formed in the HUD housing 3.

The heat dissipation holes 5 are holes for dissipating heat provided at the bottom of the HUD case, and the natural flow of air causes the hot air to be discharged through the heat dissipation holes.

In this embodiment, the heat dissipation holes 5 are provided, which is beneficial to further quickening the heat dissipation of the light source module 1.

The HUD thermal management system provided in this embodiment, includes: the device comprises a HUD shell, a light source module arranged in the HUD shell and a heat dissipation air duct arranged outside the HUD shell; a vent is formed in the side wall, close to the light source module, of the HUD shell; one end of the heat dissipation air duct is connected to the vent of the HUD shell, and the other end of the heat dissipation air duct is connected to the main air duct of the vehicle-mounted air conditioner. Because this scheme is direct to cool down light source module with the help of the air circulation system on the vehicle, and need not use extra heat sink material, compare with prior art, not only alleviateed HUD's weight, still practiced thrift HUD's manufacturing cost.

Example two

Fig. 2 is a schematic structural view of a HUD thermal management system according to a second embodiment of the present application, and fig. 3 is a schematic structural view of another HUD thermal management system according to the second embodiment of the present application, where based on the HUD thermal management system according to the first embodiment, as shown in fig. 2 or fig. 3, the HUD thermal management system 100 according to the present embodiment includes: an air circulation fan 6 and an onboard controller 7.

As shown in fig. 2, the air circulation fan 6 is disposed in the heat dissipation air duct 2, and the vehicle-mounted controller 7 is configured to send a control instruction to the air circulation fan 6 according to a preset control logic, so as to control the opening, closing, and rotation (including rotation speed and direction) of the air circulation fan 6, and thus achieve the purpose of accelerating heat dissipation and/or saving energy.

Optionally, the air circulation fan 6 includes a fan blade 61 and a motor 62, the onboard controller 7 is connected with the motor 62, the fan blade 61 is connected with a rotor of the motor 62, and the onboard controller 7 controls the air circulation fan 6 by sending a control command to the motor 62. As shown in fig. 3, the fan blades 61 may be disposed inside the heat dissipation air duct 2, and the motor 62 may be disposed outside the heat dissipation air duct 2, so as to achieve the purpose of reducing the size of the HUD thermal management system 100.

The control logic of the onboard controller 7 for the air circulation fan 6 is written in advance according to actual needs and stored in the controller of the onboard controller 7, and in one possible embodiment, the air circulation fan 6 is controlled to be turned on after the HUD is started to work for a period of time, and the air circulation fan 6 is controlled to be turned off when the HUD stops working.

In another possible embodiment, the air circulation fan 6 is controlled to be turned on and rotated at a lower rotational speed when the operating time of the HUD is short, and the air circulation fan 6 is controlled to be rotated at a higher rotational speed when the operating time of the HUD is long.

In another possible embodiment, air circulation fan 6 is controlled to rotate in the direction of blowing air toward the HUD when the temperature in the vehicle is less than a certain temperature threshold, and air circulation fan 6 is controlled to rotate in the direction of blowing air away from the HUD when the temperature in the vehicle is greater than the temperature threshold.

In another possible embodiment, the direction and/or the rotation speed of the air circulation fan 6 are controlled according to the light source temperature of the light source module 1 relative to the ambient temperature in the heat dissipation air duct 2.

Optionally, the HUD thermal management system 100 further comprises: a first temperature sensor 8 and a second temperature sensor 9, as shown in fig. 2 and 3, the vehicle-mounted controller 7 is connected with the motor 62, the first temperature sensor 8, and the second temperature sensor 9, respectively; the first temperature sensor 8 is arranged in the HUD shell 3 and used for collecting the temperature of the light source and sending the temperature of the light source to the vehicle-mounted controller 7; the second temperature sensor 9 is arranged in the heat dissipation air duct 2 and used for collecting the ambient temperature and sending the ambient temperature to the vehicle-mounted controller 7; the onboard controller 7 is used for controlling the rotation of the air circulation fan 6 according to the light source temperature and the ambient temperature.

Optionally, the first temperature sensor 8 and the second temperature sensor 9 may be used for contact temperature measurement, for example, the temperature measurement is performed by contacting with part or all of the components to be measured; or non-contact temperature measurement, such as temperature measurement by infrared. If the first sensor 8 measures temperature in a contact manner, the first sensor can be partially or completely contacted with the light source module 1; if the first sensor 8 measures temperature in a non-contact manner, it may be located at a side of the light source module 1.

The light source temperature is the temperature of the light source module 1.

The ambient temperature is the temperature in the heat dissipation air duct 2.

The onboard controller 7 may be an Electronic Control Unit (ECU) provided in the automobile itself for controlling the electric system of the automobile body, or may be a separately installed controller for controlling the HUD thermal management system, and the controller receives signals from the first temperature sensor 8 and the second temperature sensor 9, compares the light source temperature with the ambient temperature, and transmits a control command to the air circulation fan 6 to rotate the air circulation fan 6, thereby controlling the rotation direction and speed of the air circulation fan 6. Specifically, the method comprises the following steps:

(1) Control of the direction of rotation of the air circulation fan:

if the light source temperature is higher than the ambient temperature, a first control command is sent to the air circulation fan 6 to rotate the air circulation fan 6 in a first direction, which is a direction in which air flows into the HUD housing 3.

Exemplarily, when the on-vehicle air conditioner 4 of hot day is opened, the temperature is lower in the car, and the light source temperature of gathering by first temperature sensor 8 is higher than the ambient temperature who gathers by second temperature sensor 9, then sends first control command to air circulation fan 6, makes air circulation fan 6 rotatory along the first direction, and the air conditioning of on-vehicle air conditioner 4 output gets into the vent, gets into HUD shell 3 in through heat dissipation air duct 2 to the realization is to the cooling of light source module 1.

It can be understood that, in the structure shown in fig. 3, the onboard controller 7 sends a first control instruction to the motor 62, after the motor 62 receives the first control instruction, the energized coil is forced to rotate along the first direction, the motor rotor and the fan blades 61 also rotate along the first direction, and this process is continuously performed, so that air with a lower temperature in the vehicle enters the ventilation opening, and the cooling of the light source module 1 is realized.

If the light source temperature is lower than the ambient temperature, a second control command is sent to the air circulation fan 6 to rotate the air circulation fan 6 in a second direction opposite to the first direction, which is the direction in which air flows out of the HUD housing 3.

Exemplarily, when the on-vehicle air conditioner 4 of cold weather is opened, the temperature is higher in the car, and the light source temperature gathered by first temperature sensor 8 is less than the ambient temperature gathered by second temperature sensor 9, then send second control instruction to air circulation fan 6, make air circulation fan 6 rotatory along the second direction, the air circulates along the opposite direction, and the hot air that light source module 1 operation produced flows out the vent, leaves HUD shell 3 through radiating air duct 2 to the realization is to the cooling of light source module 1.

It can be understood that, in the structure shown in fig. 3, the onboard controller 7 sends a second control command to the motor 62, after the motor 62 receives the command, the energized coil is forced to rotate along the second direction, and the motor rotor and the fan blades 61 also rotate along the second direction, and this process is continuously performed, so that the heat in the light source module is discharged out of the ventilation opening, thereby achieving the cooling of the light source module 1.

For the convenience of distinction, in this embodiment, the control instruction sent by the onboard controller 7 when the temperature of the light source is higher than the ambient temperature is called a first control instruction; the control command sent by the onboard controller 7 when the light source temperature is lower than the ambient temperature is called a second control command.

It can be understood that, when the light source temperature is equal to the ambient temperature, the control instruction sent by the onboard controller 7 may be a first control instruction or a second control instruction, and may be specifically set according to an actual situation, which is not limited herein.

(2) Control of the rotation speed of the air circulation fan:

in this embodiment, the vehicle-mounted controller 7 may further control the air circulation fan to rotate at different rotation speeds according to a temperature difference between the light source temperature and the ambient temperature, for example, when the temperature difference is large, the air circulation fan is controlled to rotate at a faster speed to accelerate the cooling of the light source module; when the temperature difference is small, the air circulation fan is controlled to rotate at a low speed so as to save electric energy. Specifically, a threshold value of the temperature difference between the temperature of the light source and the ambient temperature may be set according to the gear (corresponding to the rotation speed) of the air circulation fan, and the gear (i.e., the rotation speed) of the air circulation fan may be controlled according to the set threshold value.

In one possible embodiment, the air circulation fan rotation speed may be set to three steps, and if the temperature difference between the light source temperature and the ambient temperature is less than the first threshold value, the air circulation fan 6 is rotated at the first speed; if the temperature difference between the light source temperature and the ambient temperature is greater than a second threshold value, controlling the air circulation fan 6 to rotate at a second speed; if the temperature difference between the light source temperature and the ambient temperature is between the first threshold and the second threshold, controlling the air circulation fan 6 to rotate at a third speed; the first threshold value is smaller than the second threshold value, the first speed is smaller than the third speed, and the third speed is smaller than the second speed.

In another possible embodiment, the rotation speed of the air circulation fan may be set to five steps, and if the temperature difference between the temperature of the light source and the ambient temperature is less than the third threshold, the air circulation fan 6 is controlled to rotate at a fourth speed; if the temperature difference between the light source temperature and the ambient temperature is between the third threshold and the fourth threshold, controlling the air circulation fan 6 to rotate at a fifth speed; if the temperature difference between the light source temperature and the ambient temperature is between the fourth threshold and the fifth threshold, controlling the air circulation fan 6 to rotate at a sixth speed; if the temperature difference between the light source temperature and the ambient temperature is between the fifth threshold and the sixth threshold, controlling the air circulation fan 6 to rotate at a seventh speed; and if the temperature difference between the temperature of the light source and the ambient temperature is greater than the sixth threshold, controlling the air circulation fan 6 to rotate at the eighth speed. The third threshold is smaller than the fourth threshold, the fourth threshold is smaller than the fifth threshold, the fifth threshold is smaller than the sixth threshold, the fourth speed is smaller than the fifth speed, the fifth speed is smaller than the sixth speed, the sixth speed is smaller than the seventh speed, and the seventh speed is smaller than the eighth speed.

The second temperature sensor 9 may be disposed at any position in the heat dissipation air duct 2, and optionally, the second temperature sensor 9 is disposed at a position away from the ventilation opening.

Optionally, to solve the problem of abnormal temperature of the light source module 1 caused by sunlight focusing, as shown in fig. 3, the HUD thermal management system 100 of the present embodiment further includes: optical reflection module 10 and light path adjusting device 11, optical reflection module 10 and light path adjusting device 11 all set up in HUD shell 3, and light path adjusting device 11's one end is connected with optical reflection module 10, and light path adjusting device 11's the other end is connected with on-vehicle controller 7.

In this embodiment, the onboard controller 7 is further configured to: and (3) judging whether the light source temperature exceeds the protection temperature of the light source module 1, if so, indicating that the temperature of the light source module 1 is abnormal, executing a light source protection strategy to ensure that devices in the light source module 1 are not burnt out, otherwise, controlling the air circulation fan 6 to cool the light source module 1 according to the strategy in (1) or (2).

The protection temperature is a temperature for protecting the devices in the light source module 1 from being damaged, and if the protection temperature exceeds the temperature, the devices may be damaged, and the protection temperature may be set according to performance parameters of related devices in the light source module. Optionally, the protection temperature is the highest temperature that the device in the light source module can bear, and the protection temperature of the light source module is set to 105 ℃ for example.

The temperature anomaly of the light source module is mainly caused by sunlight focusing, so that the release of sunlight focusing is the main content of the light source protection strategy in the implementation. In a possible implementation manner, according to the HUD light path characteristics and the light reversible principle, in this embodiment, the on-board controller 7 sends a light path adjusting instruction to the light path adjusting device 11 to control the light path adjusting device 11 to adjust the light reflection direction of the optical reflection module 10, so as to achieve the purpose of releasing the backward sunlight reflection focusing.

For example, taking an augmented reality HUD (AR-HUD) as an example, the optical reflection module in the AR-HUD includes a first reflector and a second reflector, and light emitted by the light source module is projected to the front of the windshield of the vehicle after being reflected by the first reflector and the second reflector, so for the AR-HUD, the first reflector and the second reflector are controlled by the light path adjusting device to be spatially staggered by a preset included angle, for example, the first reflector and/or the second reflector are controlled to rotate, so that the spatial relative position of the first reflector and the second reflector is changed, and sunlight cannot be focused on the light source module through the light path, thereby achieving the purpose of removing the backward flowing reflective focusing of sunlight, wherein the size of the preset included angle can be set according to actual conditions, and is not limited herein.

Further, the light source protection strategy may further include one or more of the following strategies:

a. the vehicle-mounted controller 7 sends a closing instruction to the light source module to control the light source module to be closed after projecting the temperature overheating prompt information, so that the light source module is shut down after prompting is performed on a user, and further heat generation of the light source module is avoided;

in one possible embodiment, the light source module 1 includes a light source control unit (digital chip) and an image display unit, the light source control unit is connected with the image display unit, and the vehicle-mounted controller is connected with the light source control unit. Correspondingly, after a closing instruction sent by the vehicle-mounted controller is received, the light source control unit generates a display element corresponding to the temperature overheating prompt information, such as a specific icon or a specific character, the image display unit generates an image corresponding to the display element, and the image corresponding to the display element is finally projected on the windshield after being converted by the optical reflection module, so that the purpose of HUD temperature overheating prompt for a user is achieved.

In a possible embodiment, after a period of time (e.g. 5 s) for the light source control unit to complete the generation of the display element, the light source control unit controls the light source module to be powered off.

b. Sending a first control instruction to the air circulation fan 6 to control the air circulation fan 6 to rotate in a first direction, wherein the first direction is a direction in which air flows into the HUD housing, so as to cool the light source module;

c. and sending an alarm instruction to the alarm module to control the alarm module to alarm, so that the user suspends the HUD.

Optionally, an alarm module is also included in the HUD thermal management system 100, the alarm module being disposed outside the HUD housing. Illustratively, the alarm module may be an existing alarm module in the vehicle, such as a voice device, a display device, a whistle device, or the like.

Optionally, after the light source protection strategy is executed, the onboard controller 7 may continue to obtain the light source temperature, the ambient temperature, and the like, determine whether the light source temperature is lower than the target temperature, and send a new light path adjustment instruction to the light path adjustment device to control the optical reflection module to perform light path restoration when the light source temperature is lower than the target temperature, and/or send a restart instruction to the light source module to control the light source module to restart, and/or control the air circulation fan to rotate in the second direction, and the like.

The target temperature is lower than the protection temperature of the light source module 1, and the specific size of the target temperature can be set according to actual conditions, and exemplarily, the target temperature is 60 ℃.

The HUD heat management system provided by the embodiment comprises a HUD shell, a light source module and a first temperature sensor which are arranged in the HUD shell, a vehicle-mounted controller, a vehicle-mounted air conditioner, an air circulation fan, a motor, a heat dissipation air duct and a second temperature sensor which are arranged outside the HUD shell; the side wall of the HUD shell close to the light source module is provided with a vent. Different with prior art, this embodiment sets up the air cycle fan in the HUD outside to utilize the wind channel to cool down for light source module, solved the too big and with high costs problem of product weight that exists among the prior art, still improved HUD thermal management system intelligent degree and cooling effect, can be at utmost make the temperature maintenance around the light source module in the suitable temperature range, improve light source module's performance and life-span, guarantee light source module steady operation.

EXAMPLE III

The control logic of the vehicle-mounted controller in fig. 3 will be described in a specific embodiment, and exemplarily, fig. 4 is a schematic flowchart of a control logic of a vehicle-mounted controller provided in a third embodiment of the present application, and as shown in fig. 4, the control method of the vehicle-mounted controller in this embodiment includes the following specific steps:

s201, acquiring the temperature of the light source and the ambient temperature.

The light source temperature is the temperature of the light source module obtained by the first temperature sensor in fig. 3, and the ambient temperature is the temperature in the heat dissipation air duct obtained by the second temperature sensor 9 in fig. 3.

It can be understood that, in the HUD working process, the vehicle-mounted controller can acquire the light source temperature and the ambient temperature in real time, and execute corresponding control operation according to the relative ambient temperature of the light source temperature and the protection temperature and the target temperature of the light source module, so as to cool or protect the light source module.

Wherein the protection temperature and the target temperature of the light source module are stored in the on-board controller in advance.

S202, if the temperature of the light source is lower than the protection temperature, the direction and the rotating speed of the air circulation fan are controlled according to the temperature of the light source and the ambient temperature.

In this embodiment, the on-vehicle controller compares the obtained light source temperature with the protection temperature of the light source module, compares the light source temperature with the ambient temperature if the obtained light source temperature is lower than the protection temperature, and controls the direction and the rotation speed of the air circulation fan according to the result and the preset control strategy and the strategies of (1) and (2) in the second embodiment, thereby realizing the cooling of the light source module, ensuring the stable operation of the light source module, and being beneficial to improving the service performance and the service life of the light source module.

And S203, if the light source temperature is higher than the protection temperature, executing a light source protection strategy.

And if the vehicle-mounted controller determines that the temperature of the light source is higher than the protection temperature of the light source module, executing a light source protection strategy. Exemplarily, fig. 5 is a logic diagram of a light source protection strategy provided in a third embodiment of the present application, and as shown in fig. 5, the light source protection strategy in the present embodiment includes:

s2031, sending a light path adjusting instruction to the light path adjusting device to control the light path adjusting device to adjust the light reflection direction of the optical reflection module.

The optical reflection module enables the light source to be focused on the light source module through the reflection of the light source in the transmission process. When the temperature of the light source exceeds the protection temperature of the light source module, the transmission route of the light source can be damaged by adjusting the light reflection direction of the optical reflection module, so that the focusing of the light source on the light source module is relieved.

S2032, sending a closing instruction to the light source module to control the light source module to be closed after projecting the temperature overheating prompt information.

Specifically, after the vehicle-mounted controller sends the light path adjusting instruction to the light path adjusting device, the vehicle-mounted controller sends a closing instruction to the light source module to project the temperature overheating prompt information and close the light source module.

S2033, sending a first control instruction to the motor to control the motor to drive the air circulation fan to rotate along a first direction, wherein the first direction is a direction for enabling air to flow into the HUD shell.

Specifically, after vehicle-mounted controller sent the light path adjusting command to light path adjusting device, light source temperature was higher than ambient temperature during consequently, and vehicle-mounted controller sends first control instruction to the motor to control the motor and drive the rotation of air cycle fan along the first direction, the lower air admission vent of temperature in the car gets into in the HUD shell through the heat dissipation wind channel, thereby realizes the cooling to light source module.

Optionally, when it is detected that the temperature of the light source is lower than the target temperature, a restart instruction is sent to the light source module to control the light source module to restart. Specifically, the target temperature may be understood as an upper limit of a temperature range in which the light source module can normally operate, which is lower than the protection temperature. After the continuous cooling of HUD is realized, the temperature of the light source module is gradually reduced, and when the temperature is lower than the target temperature, the vehicle-mounted controller sends a restart instruction to the light source module to restart the light source module.

S2034, sending an alarm instruction to the alarm module to control the alarm module to alarm.

Specifically, after the vehicle-mounted controller sends the light path adjusting instruction to the light path adjusting device, the vehicle-mounted controller sends the alarm instruction to the alarm module, so that people in the vehicle can know that the temperature of the light source module is too high, and accidents are prevented.

It is understood that S2032, S2033 and S2034 are parallel and can be executed simultaneously.

According to the technical scheme, a protection strategy for the HUD light source module in the overheating process is provided, the optical reflection module is controlled through the vehicle-mounted controller, so that a light source transmission path is damaged, and the focusing of the light source module is relieved; and then the light source module, the motor and the alarm module are controlled, so that the light source module is turned off and restarted, the air circulation fan is turned on to automatically cool the light source module, and an alarm signal is sent out. The service life of the light source module is prolonged, and the driving safety is improved.

It should be noted that, in the embodiment of the HUD thermal management system, the units and modules included in the embodiment are merely divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be implemented; in addition, specific names of the functional units are only used for distinguishing one functional unit from another, and are not used for limiting the protection scope of the application.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. It will be understood by those skilled in the art that the present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims (9)

1. A HUD thermal management system, comprising: the LED lamp comprises a HUD shell, a light source module arranged in the HUD shell and a heat dissipation air duct arranged outside the HUD shell;

a ventilation opening is formed in the side wall, close to the light source module, of the HUD shell; one end of the heat dissipation air duct is connected with the vent of the HUD shell, and the other end of the heat dissipation air duct is connected with a main air duct of the vehicle-mounted air conditioner.

2. The system according to claim 1, further comprising an onboard controller and air circulation fan disposed outside the HUD housing;

the air circulation fan is arranged in the heat dissipation air channel;

the vehicle-mounted controller is connected with the air circulation fan.

3. The system according to claim 1, further comprising an onboard controller and air circulation fan disposed outside the HUD housing;

the air circulation fan comprises fan blades and a motor; the fan blades are connected with a rotor of the motor;

the fan blades are arranged in the heat dissipation air duct, and the motor is arranged outside the heat dissipation air duct;

the vehicle-mounted controller is connected with the motor.

4. A system according to claim 2 or 3, characterized in that the system further comprises: a first temperature sensor and a second temperature sensor;

the first temperature sensor is arranged inside the HUD shell, and the second temperature sensor is arranged in the heat dissipation air duct;

the first temperature sensor is used for acquiring the light source temperature of the light source module;

the second temperature sensor is used for collecting the ambient temperature in the heat dissipation air duct;

the vehicle-mounted controller is respectively connected with the first temperature sensor and the second temperature sensor.

5. The system according to claim 2 or 3, further comprising an optical reflection module and an optical path adjusting device, wherein the optical reflection module and the optical path adjusting device are both disposed in the HUD housing, and the optical path adjusting device is respectively connected with the optical reflection module and the vehicle-mounted controller; the vehicle-mounted controller is used for adjusting the light reflection direction of the optical reflection module through the light path adjusting device.

6. The system of claim 5, wherein the optical reflection module comprises a first reflection mirror and a second reflection mirror, and the optical path adjusting device is configured to adjust the relative position of the first reflection mirror and the second reflection mirror so that the first reflection mirror and the second reflection mirror are spatially staggered by a preset included angle.

7. The system of claim 2 or 3, wherein the onboard controller is further connected to the light source module, and the onboard controller is further configured to control the light source module to be turned off or on according to a light source temperature of the light source module.

8. The system according to claim 2 or 3, further comprising an alarm module disposed outside said HUD housing; the alarm module is connected with the vehicle-mounted controller;

the vehicle-mounted controller is also used for controlling the alarm module to give an alarm according to the light source temperature of the light source module.

9. The system of any one of claims 1-3, wherein said HUD housing further defines a plurality of heat dissipation apertures.

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