CN218413182U

CN218413182U - Closed projection optical machine

Info

Publication number: CN218413182U
Application number: CN202221695126.1U
Authority: CN
Inventors: 张锦; 朱安君
Original assignee: Chengdu Jiutian Huaxin Technology Co ltd
Current assignee: Chengdu Jiutian Huaxin Technology Co ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2023-01-31
Anticipated expiration: 2032-07-01

Abstract

The utility model discloses an airtight projection ray apparatus, relate to the projector technical field, including the imaging part cavity that the camera lens was installed to the front end, set up the liquid crystal screen frame that is used for installing the imaging device subassembly in imaging part cavity bottom, set up at imaging part cavity top and imaging device subassembly and camera lens complex reflector assembly, the imaging part cavity outside is provided with outer circulation radiator unit, imaging part cavity front end has set gradually active radiator unit and inner circulation fan from top to bottom, and the inner circulation fan sets up in one side of imaging device subassembly, the air outlet wind direction of inner circulation fan is parallel arrangement with the imaging device subassembly; the utility model has reasonable structure design, compact design and small occupied space; the heat is radiated in a closed way, and no dust is generated; the air outlet wind direction of the internal circulation fan and the imaging device component are arranged in parallel, and the arrangement of the structure avoids the phenomenon that the kinetic energy loss is too large due to the fact that the circulation airflow turns or the air channel changes too much.

Description

Closed projection optical machine

Technical Field

The utility model relates to a projector technical field, more specifically relate to airtight projection ray apparatus technical field.

Background

The projector light machine is a core component of the projector. Whether good heat dissipation can be realized determines the power and noise of the optical machine, and the experience of the whole projector is directly influenced. Traditional LCD screen projector light machine adopts open light path, dispels the heat to the LCD screen with the cold air of external world, and is effectual, but the clearance dust is very troublesome, and can lead to image quality to reduce.

The basic logic of the existing sealing optical machine is that an internal circulation sealing structure is adopted, and heat is dissipated through a heat exchanger or a metal shell, so that the sealing performance and the heat dissipation performance are kept. However, the optical machine has the characteristics that the structural design is incomplete, and the heat dissipation treatment mode of the internal circulation air flow is incomplete, so that the heat dissipation is insufficient, and the power of the whole machine is limited. The prior art has the following structural defects:

(1) The air outlet of the heat radiation fan is unreasonable in arrangement, the circulating air flow turns or the air channel changes too much, and the kinetic energy loss is too large.

(2) And the high temperature part and the low temperature part are not properly arranged, resulting in the high temperature part heating the low temperature part.

(3) The structural design is not compact, too much space is occupied, and the volume of the whole machine is overlarge.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the technical problem, the utility model provides an airtight projection ray apparatus, as early as possible dispersion of heat that the LCD screen of projection ray apparatus produced.

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

an airtight projection optical machine comprises an imaging part cavity with a lens at the front end, a liquid crystal screen frame arranged at the bottom of the imaging part cavity and used for installing an imaging device assembly, and a reflector assembly arranged at the top of the imaging part cavity and matched with the imaging device assembly and the lens, wherein an external circulation heat dissipation assembly is arranged outside the imaging part cavity;

the external circulation heat dissipation assembly comprises an external circulation heat dissipation fan, a heat exchanger and a heat radiator, the heat exchanger comprises a heat absorption end and a heat dissipation end, the heat absorption end is arranged on the inner side of the cavity of the imaging part and is positioned on an air channel of the internal circulation air flow, the heat dissipation end is arranged on the outer side of the cavity of the imaging part, the heat radiator and the cavity of the imaging part are mutually independent or are connected through a plastic component with low heat conductivity coefficient, and the external circulation heat dissipation fan dissipates heat for the heat exchanger and the heat dissipation end of the heat radiator simultaneously;

the active heat dissipation assembly comprises a TEC semiconductor refrigerator main body, a heating section and a refrigerating section, wherein the heating section is arranged on the outer side of the imaging part cavity, the refrigerating section is arranged on the inner side of the imaging part cavity, and the heating section is connected to a radiator of the outer circulation heat dissipation assembly through a heat pipe.

Further, the imaging device assembly comprises heat insulation glass, a liquid crystal screen, polarizing glass and a Fresnel lens which are sequentially arranged from bottom to top, wherein the heat insulation glass is arranged on the outer side of the liquid crystal screen frame, and the heat insulation glass comprises a glass substrate, a polarizer and an APF (active light filter) film with a polarization separation effect.

Furthermore, the distance between the heat insulation glass and the liquid crystal screen is 3-5 mm; the distance between the polarized glass and the liquid crystal screen is 3-5 mm; the distance between the Fresnel lens and the polarized glass is 8-12 mm.

Furthermore, the imaging part cavity, the lens, the liquid crystal screen frame, the internal circulation fan, the active heat dissipation assembly and the external circulation heat dissipation assembly form a closed cavity, and a heat exchanger and a radiator of the external circulation heat dissipation assembly are mutually independent or connected through a plastic part with low heat conductivity coefficient.

The utility model has the advantages as follows:

1. the utility model has reasonable structure design, compact design and small occupied space; the heat is dissipated in a closed way, and no dust is generated; the air outlet wind direction of the internal circulation fan and the imaging device component are arranged in parallel, and the arrangement of the structure avoids the phenomenon that the kinetic energy loss is too large due to the fact that the circulation airflow turns or the air channel changes too much.

2. The active radiator unit outside is provided with the section of generating heat and the inboard is provided with the refrigeration section, the refrigeration section sets up on the inner loop air current wind channel, the section of generating heat is connected to outer loop radiator unit's radiator through the heat pipe on, and this kind of high temperature part and low temperature part set up rationally, have avoided high temperature part heating low temperature part.

3. The refrigeration section of the active heat dissipation assembly is located on the internal circulation airflow channel, and when the active heat dissipation assembly works, internal circulation airflow generated by the cavity of the imaging part sequentially passes through the imaging device assembly, the liquid crystal screen frame and the inner side of the heat exchanger under the pushing of the internal circulation fan, and then returns to the internal circulation fan through the refrigeration section of the inner side of the active heat dissipation device assembly, so that the cooling effect on the imaging device assembly is achieved. The outer circulation radiating assembly takes away heat of a heating section of the active radiating assembly through the radiator of the outer circulation radiating assembly, takes away heat generated by the imaging device assembly at a heat absorption end of the heat exchanger, and radiates heat at the radiating ends of the radiator and the heat exchanger through the external radiating fan, so that the purpose of efficient radiating is achieved.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a schematic view of the complete mechanism of FIG. 1;

FIG. 3 is a top view of FIG. 2;

FIG. 4 is a perspective view of one of the viewing angles of FIG. 2;

FIG. 5 is a perspective view of the alternative view of FIG. 2;

reference numerals: the heat dissipation device comprises a lens 1, an imaging part cavity 2, an external circulation heat dissipation assembly 3, an external circulation heat dissipation fan 3, a radiator 2, a heat exchanger 3, a reflector assembly 4, a liquid crystal screen frame 5, heat insulation glass 6, a liquid crystal screen 7, polarized glass 8, a Fresnel lens 9, an internal circulation fan 10, an active heat dissipation assembly 11, a refrigeration section 11, a semiconductor refrigerator main body 11, a heating section 3 and a heat pipe 12.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "up", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

Example 1

As shown in fig. 1 to 5, this embodiment provides a sealed projection optical machine, which includes an imaging part cavity 2 with a lens 1 mounted at a front end, a liquid crystal display frame 5 disposed at a bottom of the imaging part cavity 2 and used for mounting an imaging device assembly, and a reflector assembly 4 disposed at a top of the imaging part cavity 2 and matched with the imaging device assembly and the lens 1, wherein an external circulation heat dissipation assembly 3 is disposed outside the imaging part cavity 2, an active heat dissipation assembly 11 and an internal circulation fan 10 are sequentially disposed at the front end of the imaging part cavity 2 from top to bottom, the internal circulation fan 10 is disposed at one side of the imaging device assembly, and an air outlet direction of the internal circulation fan 10 is parallel to the imaging device assembly;

the external circulation heat dissipation assembly 3 comprises an external circulation heat dissipation fan 3-1, a heat exchanger 3-3 and a heat radiator 3-2, wherein the heat exchanger 3-3 comprises a heat absorption end and a heat dissipation end, the heat absorption end is arranged on the inner side of the imaging part cavity 2 and is positioned on an air channel of internal circulation air flow, the heat dissipation end is arranged on the outer side of the imaging part cavity 2, the heat radiator 3-2 and the imaging part cavity 2 are mutually independent or are connected through a plastic part with low heat conductivity coefficient, and the external circulation heat dissipation fan 3-1 simultaneously dissipates heat for the heat exchanger 3-3 and the heat dissipation end of the heat radiator;

the active heat dissipation assembly 11 comprises a TEC semiconductor refrigerator main body 11-2, a heating section 11-3 arranged on the outer side of the imaging part cavity 2 and a refrigerating section 11-1 arranged on the inner side of the imaging part cavity 2, wherein the refrigerating section 11-1 is arranged on an inner circulation airflow air channel, and the heating section 11-3 is connected to a radiator 3-2 of the outer circulation heat dissipation assembly 3 through a heat pipe 12.

The structure of the embodiment is reasonable in design, compact in design and small in occupied space; the heat is radiated in a closed way, and no dust is generated; the air outlet wind direction of the internal circulation fan and the imaging device component are arranged in parallel, and the arrangement of the structure avoids the phenomenon that the kinetic energy loss is too large due to the fact that the circulation airflow turns or the air channel changes too much.

The refrigeration section of the active heat dissipation assembly is located on the internal circulation airflow air channel, and when the cooling device works, internal circulation airflow generated by the cavity of the imaging part is pushed by the internal circulation fan to sequentially pass through the inner sides of the imaging device assembly, the liquid crystal screen frame and the heat exchanger and then return to the internal circulation fan through the refrigeration section of the inner side of the active heat dissipation device assembly, so that the cooling effect on the imaging device assembly is achieved. The outer circulation radiating assembly takes away heat of a heating section of the active radiating assembly through the radiator of the outer circulation radiating assembly, takes away heat generated by the imaging device assembly at a heat absorption end of the exchanger, and dissipates heat of the radiator and a heat dissipation end of the heat exchanger through an external radiating fan, so that the purpose of efficient heat dissipation is achieved.

Example 2

The embodiment is further optimized on the basis of embodiment 1, and specifically comprises the following steps:

the imaging device assembly comprises heat insulation glass 6, a liquid crystal screen 7, polarizing glass 8 and a Fresnel lens 9 which are sequentially arranged from bottom to top, wherein the heat insulation glass 6 is arranged on the outer side of the liquid crystal screen frame 5, and the heat insulation glass 6 comprises a glass substrate, a polarizer and an APF film with a polarization separation effect.

The distance between the heat insulation glass 6 and the liquid crystal screen 7 is 3-5 mm; the distance between the polarizing glass 8 and the liquid crystal screen 7 is 3-5 mm; the distance between the Fresnel lens 9 and the polarized glass 8 is 8-12 mm. The imaging part cavity 2, the lens 1, the liquid crystal screen frame 5, the internal circulation fan 10, the active heat dissipation assembly 11 and the external circulation heat dissipation assembly form a closed cavity, and the heat exchanger and the radiator of the external circulation heat dissipation assembly 3 are mutually independent or connected through a plastic part with low heat conductivity coefficient.

Claims

1. An airtight projection optical machine comprises an imaging part cavity (2) with a lens (1) mounted at the front end, a liquid crystal screen frame (5) arranged at the bottom of the imaging part cavity (2) and used for mounting an imaging device assembly, and a reflector assembly (4) arranged at the top of the imaging part cavity (2) and matched with the imaging device assembly and the lens (1), and is characterized in that an external circulation heat dissipation assembly (3) is arranged outside the imaging part cavity (2), an active heat dissipation assembly (11) and an internal circulation fan (10) are sequentially arranged at the front end of the imaging part cavity (2) from top to bottom, the internal circulation fan (10) is arranged on one side of the imaging device assembly, and the air outlet direction of the internal circulation fan (10) is parallel to the imaging device assembly;

the external circulation heat dissipation assembly (3) comprises an external circulation heat dissipation fan (3-1), a heat exchanger (3-3) and a heat radiator (3-2), the heat exchanger (3-3) comprises a heat absorption end and a heat dissipation end, the heat absorption end is arranged on the inner side of the imaging part cavity (2) and is positioned on an air channel of internal circulation air flow, the heat dissipation end is arranged on the outer side of the imaging part cavity (2), the heat radiator (3-2) and the imaging part cavity (2) are mutually independent or are connected through a plastic part with low heat conductivity coefficient, and the external circulation heat dissipation fan (3-1) dissipates heat for the heat exchanger (3-3) and the heat dissipation end of the heat radiator at the same time;

the active heat dissipation assembly (11) comprises a TEC semiconductor refrigerator main body (11-2), a heating section (11-3) arranged on the outer side of the imaging part cavity (2) and a refrigerating section (11-1) arranged on the inner side of the imaging part cavity (2), wherein the refrigerating section (11-1) is arranged on an inner circulation airflow air channel, and the heating section (11-3) is connected to a radiator (3-2) of the outer circulation heat dissipation assembly (3) through a heat pipe (12).

2. The closed projection light machine according to claim 1, wherein the imaging device assembly comprises a heat insulation glass (6), a liquid crystal screen (7), a polarization glass (8) and a fresnel lens (9) which are arranged from bottom to top in sequence, the heat insulation glass (6) is installed outside the liquid crystal screen frame (5), and the heat insulation glass (6) comprises a glass substrate, a polarizer and an APF film with polarization separation function.

3. The closed projection light machine according to claim 2, characterized in that the distance between the heat insulation glass (6) and the liquid crystal screen (7) is 3-5 mm; the distance between the polarized glass (8) and the liquid crystal screen (7) is 3-5 mm; the distance between the Fresnel lens (9) and the polarized glass (8) is 8-12 mm.

4. The closed projection optical machine according to claim 1, wherein the imaging part cavity (2), the lens (1), the liquid crystal display frame (5), the internal circulation fan (10), the active heat dissipation assembly (11) and the external circulation heat dissipation assembly form a closed cavity, and the heat exchanger and the heat sink of the external circulation heat dissipation assembly (3) are independent from each other or connected through a plastic part with low thermal conductivity.