Optical machine with high heat dissipation efficiency and heat dissipation method thereof

Abstract

The invention discloses an optical machine with high heat dissipation efficiency, which comprises a light source (1), an optical assembly (2), a lens (3) and a heat dissipation assembly (4), after the light source (1) emits initial light to the optical assembly (2), the optical assembly (2) emits shaped scattered light to the lens (3), the lens (3) emits projection light, and the projection light is emitted by the heat dissipation assembly (4). The heat dissipation assembly (4) comprises a heat dissipation fan (41) and multiple sets of heat dissipation fins (42) which are arranged in a split mode, the heat dissipation fan (41) is arranged on the side close to the lens (3), and the multiple sets of heat dissipation fins (42) are arranged on the side close to the light source (1); when the heat dissipation assembly (4) works, the heat dissipation fan (41) and the multiple sets of heat dissipation fins (42) form a heat dissipation air path used for cooling the optical assembly (2) and the light source (1).

Description

Technical Field

[0001] The present invention relates to the technical field of projectors, and in particular to an optical machine with high heat dissipation efficiency and a heat dissipation method thereof. Background Art

[0002] The projection engine is the core component of the projector. Whether it can dissipate heat well determines the power and noise of the engine, which directly affects the overall experience of the projector.

[0003] Traditional projector optical machines mostly use a heat pipe + fin + fan cooling mode. When traditional projectors of various types use this cooling method, the fan and the fin are one-to-one corresponding, and the fan selection is always based on the area of ​​the fins, that is, the fan radius is limited by the fin area. Secondly, as the functions of projectors become more and more abundant, more heat dissipation components are needed to dissipate heat for some components in the body, and additional radiators and cooling fans are often required. The heat dissipation components greatly increase the volume and working noise of the lighting system.

[0004] Therefore, the cooling system of the traditional projector optical machine has the following problems: when the fin area is relatively small, a relatively large fan cannot be used for heat dissipation, and the heat dissipation efficiency of the optical machine cannot be met. Moreover, when each set of fins corresponds to a cooling fan, the whole machine will have a large number of cooling fans, high noise, multiple interfaces, and complex control and management.

[0005] In summary, the heat dissipation system of the traditional projector optical machine has the problem of not being able to take into account the heat dissipation efficiency, noise reduction and miniaturization of the optical machine at the same time. Summary of the invention

[0006] In view of this, the present invention provides an optical machine with high heat dissipation efficiency. By improving the internal structure of the optical machine, the problem that the heat dissipation system of the traditional projector optical machine cannot take into account the heat dissipation efficiency, noise reduction and miniaturization of the optical machine is solved.

[0007] To solve the above problems, the technical solution of the present invention is to adopt an optical machine with high heat dissipation efficiency, including: a light source, an optical component, a lens and a heat dissipation component, after the light source emits initial light to the optical component, the optical component emits shaped scattered light to the lens, and the lens emits projection light, the heat dissipation component includes a separately arranged heat dissipation fan and multiple groups of heat dissipation fins, wherein the heat dissipation fan is arranged on a side close to the lens, and the multiple groups of heat dissipation fins are arranged on a side close to the light source; when the heat dissipation component is working, the heat dissipation fan and the multiple groups of heat dissipation fins form a heat dissipation air path for cooling the optical component and the light source.

[0008] Optionally, the optical machine also includes a shell, the light source and the optical component are arranged inside the shell, the light incident side of the lens and the air outlet side of the cooling fan are arranged inside the shell, and the light outlet side of the lens and the air inlet side of the cooling fan are arranged outside the shell.

[0009] Optionally, a plurality of groups of heat dissipation fins are fixedly disposed on the inner wall of the shell, and heat dissipation holes for air outlet are disposed at positions of the shell corresponding to the heat dissipation fins.

[0010] Optionally, in the direction of the main optical axis of the lens, the maximum length of a portion of the lens located outside the housing is greater than the maximum length of a portion of the cooling fan located outside the housing.

[0011] Optionally, a diameter of the heat dissipation fan is smaller than a width of the housing and smaller than a height of the housing.

[0012] Optionally, the light source is a white light source or an RGB light source.

[0013] Correspondingly, the present invention provides a heat dissipation method for an optical machine with high heat dissipation efficiency, which is applied to the above-mentioned optical machine, including: pre-calibrating the heat accumulation rate of the lighting system; generating the required air supply volume based on the heat accumulation rate; and controlling the speed of the cooling fan based on the required air supply volume when the lighting system is working.

[0014] Optionally, the heat dissipation method also includes: after controlling the speed of the cooling fan based on the required air supply volume, acquiring temperature data in real time based on a temperature sensor built into the shell, and transmitting the temperature data to a PID control unit, wherein the PID control unit fine-tunes the speed of the cooling fan in real time based on the difference between the temperature data and the target temperature and the rate of change of the difference.

[0015] Optionally, controlling the speed of the cooling fan based on the required air supply volume includes: pre-calibrating the proportional relationship between the cooling fan speed and the air supply volume; generating a target speed based on the required air supply volume and the proportional relationship; and controlling the rotation of the cooling fan based on the target speed. The primary improvement of the present invention is the optical machine with high heat dissipation efficiency provided. The heat dissipation component is separated and the heat dissipation fan is arranged on the side close to the lens, and multiple groups of heat dissipation fins are arranged on the side close to the light source. On the first hand, a heat dissipation air path is formed that can cool the optical component and the light source at the same time. On the second hand, the limitation of the fan radius by the fin area is eliminated, so that the fan radius is greatly increased, and the maximum air supply volume is effectively improved. On the third hand, the problem of vacant internal space under the lens of the traditional optical machine is solved by setting the separated fan on one side of the lens, effectively improving the utilization rate of the internal space of the optical machine and realizing the miniaturization of the optical machine. On the fourth hand, since the fan radius is greatly increased, when the required air supply volume of the lighting system is certain, the rotation speed of the fan used in the present invention is much lower than the rotation speed of the traditional small radius fan, effectively reducing the fan noise, which is the main noise source of the optical machine, and solving the problem that the heat dissipation system of the traditional projector optical machine cannot take into account the heat dissipation efficiency, noise reduction and miniaturization of the optical machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a simplified structural connection diagram of the optical machine with high heat dissipation efficiency of the present invention; Figure 2 It is a simplified flow chart of the heat dissipation method of the optical machine with high heat dissipation efficiency of the present invention. Implementation

[0017] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0020] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0022] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0023] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0025] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0026] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0027] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0028] Specifically, Figure 1 As shown, an optical machine with high heat dissipation efficiency includes: a light source 1, an optical component 2, a lens 3 and a heat dissipation component 4. After the light source 1 emits initial light to the optical component 2, the optical component 2 emits shaped scattered light to the lens 3, and the lens 3 emits projection light. The heat dissipation component 4 includes a heat dissipation fan 41 and a plurality of heat dissipation fins 42 that are separately arranged, wherein the heat dissipation fan 41 is arranged on a side close to the lens 3, and the plurality of heat dissipation fins 42 are arranged on a side close to the light source 1; when the heat dissipation component 4 is working, the heat dissipation fan 41 and the plurality of heat dissipation fins 42 form a heat dissipation air path for cooling the optical component 2 and the light source 1. The light source 1 can be a white light source, an RGB light source, etc., and the present invention does not specifically limit the type of the light source 1.

[0029] At the same time, since the operation of the heat dissipation component 4 adopted in the present invention does not depend on the specific structure of the optical component 2, that is, the operation of the heat dissipation component 4 is not affected by the specific structure of the optical component 2, the present invention does not limit the specific structure of the optical component 2. Figure 1 As shown, the optical component 2 in the figure is only a principle example made to illustrate the working principle of the present invention. The optical component 2 may include a light cone, an orthocentric Fresnel lens, a light rod, insulating glass, a TFT component, an eccentric Fresnel lens and a reflective lens. After the light source 1 emits initial light, the initial light is shaped by the light cone, the orthocentric Fresnel lens and the light rod in sequence, and then is incident on the insulating glass and the TFT component. The TFT component outputs scattered light, which is transmitted to the lens through the eccentric Fresnel lens and the reflective lens and then emitted.

[0030] Furthermore, in order to further reduce the internal temperature of the optical device 2, a TEC semiconductor refrigeration plate can also be set, and the p-type material surface of the TEC semiconductor refrigeration plate is arranged in the enclosed space formed by the optical device 2, and the n-type material surface of the TEC semiconductor refrigeration plate is arranged outside the enclosed space formed by the optical device 2 and is located in the heat dissipation air path, so as to ensure that after the p-type material surface absorbs heat and transfers it to the n-type material surface, the heat of the n-type material surface can be transferred to the outside through the heat dissipation air path, thereby further improving the heat dissipation efficiency of the optical machine.

[0031] Furthermore, to ensure uniform heat dissipation of the optical device 2, a closed second heat dissipation air path composed of a second heat dissipation component can be provided on the side of the optical device 2 away from the heat dissipation air path, thereby dissipating heat for the TFT component. The second heat dissipation component can be composed of a heat dissipation fan, heat dissipation fins and a TEC semiconductor cooling sheet.

[0032] When designing the optical machine lighting system, the inventor creatively applied the modular design concept to it. By setting the heat dissipation component 4 separately, the traditional design concept of "one group of heat dissipation fins corresponds to one fan" is abandoned. As a result, the present invention only needs a single heat dissipation fan 41 to solve the heat dissipation problem, without the need to set up multiple heat dissipation fans and their corresponding multiple control interfaces. At the same time, the heat dissipation design can be carried out based on the overall heat dissipation requirements of the optical machine. For example, Figure 1 As shown, a heat dissipation air path is provided between the light source 1 and the light cone, where the heat dissipation of the light machine is most needed, and heat dissipation for both can be achieved by rotating a single heat dissipation fan 41 .

[0033] At the same time, by setting the heat dissipation component 4 separately, the radius of the fan is no longer limited by the fin area, so that the fan radius is greatly increased, the maximum air supply volume is effectively improved, and the full-load heat dissipation capacity of the heat dissipation component 4 is increased. At the same time, when the air supply volume required by the optical machine is certain, the rotation speed of the fan used in the present invention is much lower than the rotation speed of the traditional small-radius fan, which effectively reduces the fan noise, which is the main noise source of the optical machine.

[0034] Furthermore, the optical machine also includes a shell 5, the light source 1 and the optical component 2 are arranged inside the shell 5, the light incident side of the lens 3 and the air outlet side of the cooling fan 41 are arranged inside the shell 5, and the light outlet side of the lens 3 and the air inlet side of the cooling fan 41 are arranged outside the shell 5.

[0035] Furthermore, the cooling fan 41 can be configured to form a negative pressure inside the optical machine. In this case, the air outlet side of the cooling fan 41 is arranged outside the shell 5, and the air inlet side of the cooling fan 41 is arranged inside the shell 5.

[0036] Furthermore, a plurality of groups of heat dissipation fins 42 are fixedly disposed on the inner wall of the housing 5 , and heat dissipation holes 51 for air outlet or air inlet are disposed at positions of the housing 5 corresponding to the heat dissipation fins 42 .

[0037] Since the present invention abandons the traditional design concept of "one set of heat dissipation fins corresponds to one fan", it is only necessary to ensure that the maximum length of the portion of the heat dissipation fan 41 located outside the housing 5 is less than the maximum length of the portion of the lens 3 located outside the housing 5 in the direction of the main optical axis of the lens 3, so as to realize the utilization of the idle space below the lens while avoiding the additional increase of the volume of the housing 5. At the same time, it is necessary to ensure that the diameter of the heat dissipation fan 41 is less than the width of the housing 5 and less than the height of the housing 5, that is, the diameter of the heat dissipation fan 41 only needs to be limited by the width and height of the housing 5, and does not need to be limited by the fin area, which greatly improves the maximum radius that can be designed for the heat dissipation fan and effectively improves the heat dissipation capacity of the heat dissipation component.

[0038] The present invention arranges the heat dissipation component 4 separately, arranges the heat dissipation fan 41 on the side close to the lens 3, and arranges multiple groups of heat dissipation fins 42 on the side close to the light source 1. On the one hand, a heat dissipation air path is formed that can cool the optical component 2 and the light source 1 at the same time. On the second hand, the limitation of the fan radius by the fin area is eliminated, so that the fan radius is greatly increased, and the maximum air supply volume is effectively improved. On the third hand, the problem of vacant internal space under the lens of the traditional optical machine is solved by arranging the split fan on one side of the lens, effectively improving the utilization rate of the internal space of the optical machine and realizing the miniaturization of the optical machine. On the fourth hand, since the fan radius is greatly increased, when the required air supply volume of the optical machine is certain, the rotation speed of the fan used in the present invention is much lower than that of the traditional small-radius fan, effectively reducing the fan noise, which is the main noise source of the optical machine, and solving the problem that the heat dissipation system of the traditional projector optical machine cannot take into account the heat dissipation efficiency, noise reduction and miniaturization of the optical machine.

[0039] Correspondingly, such as Figure 2 As shown, the present invention provides a heat dissipation method for an optical machine with high heat dissipation efficiency, which is applied to the above-mentioned optical machine, including: pre-calibrating the heat accumulation rate of the lighting system; generating the required air supply volume based on the heat accumulation rate; when the lighting system is working, controlling the rotation speed of the cooling fan 41 based on the required air supply volume.

[0040] The heat dissipation method claimed to be protected by the present invention relies on the above-mentioned optical machine. Since the optical machine abandons the traditional design concept of "one group of heat dissipation fins corresponds to one fan", the present invention can calculate the fan speed based on the overall heat dissipation requirements of the optical machine, without the need to separately calculate the air supply required for a certain heat-generating component, thereby achieving simple and accurate speed control of the heat dissipation fan.

[0041] Furthermore, the heat dissipation method also includes: after controlling the rotation speed of the cooling fan 41 based on the required air supply volume, acquiring temperature data in real time based on the temperature sensor built into the shell 5, and transmitting the temperature data to the PID control unit, wherein the PID control unit fine-tunes the rotation speed of the cooling fan 41 in real time based on the difference between the temperature data and the target temperature and the rate of change of the difference.

[0042] Furthermore, generating a required air supply volume based on the heat accumulation rate includes: pre-calibrating the internal space volume of the optical-mechanical lighting system, and generating the required air supply volume based on the space volume and the heat accumulation rate.

[0043] Furthermore, the rotation speed of the cooling fan 41 is controlled based on the required air supply volume, including: pre-calibrating the proportional relationship between the rotation speed of the cooling fan 41 and the air supply volume; generating a target rotation speed based on the required air supply volume and the proportional relationship; and controlling the rotation of the cooling fan 41 based on the target rotation speed. The above is an optical machine with high heat dissipation efficiency and a heat dissipation method thereof provided in an embodiment of the present invention. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0044] Professionals may further realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention. The steps of the method or algorithm described in conjunction with the embodiments disclosed herein can be directly implemented with a software module executed by a hardware or processor, or a combination of the two. The software module can be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the technical field.

Claims

1. An optical machine with high heat dissipation efficiency, comprising: A light source (1), an optical component (2), a lens (3) and a heat dissipation component (4), wherein the light source (1) emits initial light to the optical component (2), the optical component (2) emits shaped scattered light to the lens (3), and the lens (3) emits projection light, characterized in that the heat dissipation component (4) comprises a separately arranged heat dissipation fan (41) and a plurality of groups of heat dissipation fins (42), wherein: The heat dissipation fan (41) is arranged on a side close to the lens (3), and the plurality of groups of heat dissipation fins (42) are arranged on a side close to the light source (1); When the heat dissipation component (4) is in operation, the heat dissipation fan (41) and the plurality of groups of heat dissipation fins (42) form a heat dissipation air path for cooling the optical component (2) and the light source (1).

2. The optical machine according to claim 1, characterized in that: The optical machine further comprises a housing (5), the light source (1) and the optical component (2) are arranged inside the housing (5), the light entrance side of the lens (3) and the air outlet side of the cooling fan (41) are arranged inside the housing (5), and the light exit side of the lens (3) and the air entrance side of the cooling fan (41) are arranged outside the housing (5).

3. The optical machine according to claim 2, characterized in that: A plurality of groups of heat dissipation fins (42) are fixedly arranged on the inner wall of the shell (5), and heat dissipation holes (51) for discharging air are arranged at positions of the shell (5) corresponding to the heat dissipation fins (42).

4. The optical machine according to claim 2, characterized in that: In the direction of the main optical axis of the lens (3), the maximum length of the portion of the lens (3) located outside the housing (5) is greater than the maximum length of the portion of the cooling fan (41) located outside the housing (5).

5. The optical machine according to claim 2, characterized in that: The diameter of the heat dissipation fan (41) is smaller than the width of the housing (5), and smaller than the height of the housing (5).

6. The optical machine according to claim 1, characterized in that: The light source (1) is one of a white light source and an RGB light source.

7. A heat dissipation method for an optical machine with high heat dissipation efficiency, applied to the optical machine as claimed in claims 1 to 6, characterized in that: include: Pre-calibrate the heat accumulation rate of the lighting system; generating a required air supply volume based on the heat accumulation rate; When the lighting system is working, the rotation speed of the cooling fan (41) is controlled based on the required air supply volume.

8. The heat dissipation method according to claim 7, characterized in that: The heat dissipation method further comprises: After the rotation speed of the cooling fan (41) is controlled based on the required air supply volume, temperature data is acquired in real time based on a temperature sensor built into the housing (5) and transmitted to a PID control unit. The PID control unit fine-tunes the rotation speed of the cooling fan (41) in real time based on the difference between the temperature data and the target temperature and the rate of change of the difference.

9. The heat dissipation method according to claim 7, characterized in that: The speed of the cooling fan (41) is controlled based on the required air supply volume, including: Pre-calibrating the proportional relationship between the speed of the cooling fan (41) and the air supply volume; generating a target rotation speed based on the required air supply volume and the proportional relationship; The cooling fan (41) is controlled to rotate based on the target rotation speed.

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