CN220603832U

CN220603832U - Single LCD projection optical machine and projector

Info

Publication number: CN220603832U
Application number: CN202322005979.9U
Authority: CN
Inventors: 胡全友; 陈昭; 江浩
Original assignee: Formovie Chongqing Innovative Technology Co Ltd
Current assignee: Formovie Chongqing Innovative Technology Co Ltd
Priority date: 2023-07-27
Filing date: 2023-07-27
Publication date: 2024-03-15
Anticipated expiration: 2033-07-27

Abstract

The application relates to a single LCD projection light machine and a projector. The single LCD projector comprises a shell, a heat exchanger, an inner circulation fan and an outer circulation fan. The inside of the shell is provided with a mounting cavity for mounting the LCD screen. The heat exchanger is arranged on the side wall of the shell, an inner circulation channel and an outer circulation channel which are not communicated with each other are arranged in the heat exchanger, and a first air inlet and a first air outlet are arranged on the heat exchanger and are communicated with the installation cavity. The heat exchanger is provided with a second air inlet and a second air outlet so as to be communicated with the outside. The inner circulating fan is arranged in the mounting cavity, and the inner circulating fan can enable air flow in the mounting cavity to flow through the LCD screen and flow into the inner circulating channel. The outer circulation fan is arranged on the outer side of the shell, and the outer circulation fan can enable external airflow to flow into the outer circulation channel. In this application, external air current can exchange heat in the heat exchanger with the air current of installation intracavity, and heat exchange efficiency is higher in the section bar radiator compared, can reduce the temperature of LCD screen to a greater extent.

Description

Single LCD projection optical machine and projector

Technical Field

The present disclosure relates to a projector, and more particularly to a single LCD projector and a projector.

Background

In a single LCD projector, the opto-mechanical structure is typically of a closed design. The inner circulation air duct of the closed optical machine is relatively independent, so that the projection optical machine can effectively prevent dust particles in air from entering the inner circulation air duct and prevent the LCD screen from being polluted. In order to pursue higher brightness, the heat generated in the projector is also increased, so that the heat dissipation in the projector is more important. The traditional projection ray machine adopts a section radiator, and the heat exchange efficiency of the section radiator is poor, so that the temperature of the LCD screen is difficult to reduce.

Disclosure of Invention

Based on this, it is necessary to provide a single LCD projector and a projector aiming at the problems that the conventional projector adopts a profile radiator, and the heat exchange efficiency of the profile radiator is poor, which results in the difficulty in reducing the temperature of the LCD screen.

According to a first aspect of the present application, a single LCD projector is presented, the single LCD projector comprising:

a housing having an installation cavity therein for installing at least the LCD screen;

the heat exchanger is arranged on the side wall of the shell, an inner circulation channel and an outer circulation channel which are not communicated with each other are arranged in the heat exchanger, a first air inlet and a first air outlet are arranged on the heat exchanger, and the opposite ends of the inner circulation channel are communicated with the mounting cavity through the first air inlet and the first air outlet respectively; the heat exchanger is also provided with a second air inlet and a second air outlet, and the external circulation channel is communicated with the external environment through the second air inlet and the second air outlet respectively;

an inner circulation fan installed in the installation cavity, the inner circulation fan being configured to enable an air flow in the installation cavity to flow through the LCD panel and into the inner circulation passage; and

an outer circulation fan installed outside the housing, the outer circulation fan being configured to enable an external air flow to flow into the outer circulation passage.

In one embodiment, the housing is provided with a containing cavity which is not communicated with the mounting cavity, and a mounting notch is arranged on the side wall of the housing in a penetrating manner along the first direction;

the heat exchanger is arranged in the mounting notch and is connected with the side wall of the mounting notch in a sealing way;

the second air inlet and the second air outlet are opposite to each other along the first direction, and the second air outlet is communicated with the external environment through the accommodating cavity.

In one embodiment, the heat exchanger includes a plurality of fins disposed at intervals;

the outer circulation channels are defined between every two adjacent fins; the inner circulation channels are arranged in each fin.

In one embodiment, each fin extends along the second direction, and a plurality of fins are arranged at intervals along the third direction;

the extending direction of the internal circulation channel in each fin is respectively arranged at an angle with the first direction and the second direction;

the first direction, the second direction and the third direction are perpendicular to each other.

In one embodiment, the heat exchanger further comprises a main body part installed in the installation notch, and the fins are arranged in the inner cavity of the main body part;

the first air inlet and the first air outlet are respectively arranged at two opposite sides of the main body part along the second direction; the second air inlet and the second air outlet are respectively arranged at two opposite sides of the main body part along the first direction;

the first direction and the second direction are perpendicular to each other.

In one embodiment, the mounting cavity comprises an annular cavity portion disposed about an axis extending in a third direction; the heat exchanger is arranged on a flow path of the air flow in the annular cavity part, and the first air inlet and the first air outlet are respectively communicated with the annular cavity part;

the inner circulation fan is mounted on the flow path of the air flow within the annular cavity portion.

In one embodiment, the single LCD projector further includes an LCD screen and a heat insulating glass disposed at opposite intervals along the second direction, and a portion of the annular cavity is formed between the LCD screen and the heat insulating glass;

wherein the second direction and the third direction are perpendicular to each other.

In one embodiment, the housing further includes a deflector disposed within the annular cavity portion, the deflector including a first portion extending toward the air outlet of the internal circulation fan and a second portion extending toward the first air inlet, the deflector configured to direct an air flow blown from the internal circulation fan to the first air inlet.

In one embodiment, the external circulation fan is arranged on the other side of the shell opposite to the heat exchanger along the first direction, the external circulation fan is provided with an air suction fan, and the external circulation fan is configured to suck external air into the heat exchanger from the second air inlet; or (b)

The outer circulation fan is arranged towards the second air inlet of the heat exchanger, and the outer circulation fan is arranged as an air blowing fan and is used for blowing air towards the second air inlet.

According to a second aspect of the present application, there is also proposed a projector comprising a single LCD projector light engine as described above, the single LCD projector light engine comprising:

the heat exchanger is arranged on the side wall of the shell, an inner circulation channel and an outer circulation channel which are not communicated with each other are arranged in the heat exchanger, a first air inlet and a first air outlet are arranged on the heat exchanger, and the opposite ends of the inner circulation channel are communicated with the mounting cavity through the first air inlet and the first air outlet respectively; the heat exchanger is provided with a second air inlet and a second air outlet, and the external circulation channel is communicated with the external environment through the second air inlet and the second air outlet respectively;

the inner circulating fan is arranged in the mounting cavity and is used for enabling air flow in the mounting cavity to flow through the LCD screen and flow into the first air inlet; and

the outer circulation fan is arranged on the outer side of the shell and faces the second air inlet or the second air outlet.

In the technical scheme of the application, the single LCD projection optical machine is provided with the LCD screen through the installation cavity in the shell, and the air in the installation cavity exchanges heat with the outside air through the internal circulation channel and the external circulation channel in the heat exchanger, so that the heat of the LCD screen is dissipated. Specifically, the heat exchanger enables the internal circulation channel to be communicated with the installation cavity through the first air inlet and the first air outlet, so that when the internal circulation fan enables air flow in the installation cavity to flow through the LCD screen and flow into the first air inlet, the air flow can enter the internal circulation channel. The heat exchanger also enables the outer circulation channel to be communicated with the external environment through the second air inlet and the second air outlet, so that when the outer circulation fan sends air towards the second air inlet or the second air outlet, external air flow can exchange heat with air flow in the installation cavity, and therefore heat is dissipated for the installation cavity. In this application, external air current can constantly carry out heat transfer with the air current in the installation cavity when flowing, therefore heat exchange efficiency is higher in the section bar radiator compared, can reduce the temperature of LCD screen to a greater extent.

Drawings

Fig. 1 is a schematic structural diagram of a single LCD projector according to an embodiment of the present application.

Fig. 2 is a schematic structural view of a part of the structure of fig. 1.

Fig. 3 is a schematic top view of the single LCD projector of fig. 1.

Fig. 4 is a schematic cross-sectional view at A-A in fig. 3.

Fig. 5 is a side view of the single LCD projector of fig. 1.

Fig. 6 is a schematic cross-sectional view at B-B in fig. 5.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Single LCD projection optical machine	1	Shell body
11	Mounting cavity	111	Annular cavity portion
				12	Accommodating cavity	13	Mounting notch
2	Heat exchanger	21	Main body part
				3	Internal circulation fan	4	External circulation fan
5	LCD screen	6	Heat insulating glass
				X	First direction	Y	Second direction
Z	Third direction of	\	\

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

In a single LCD projector, the opto-mechanical structure is typically of a closed design. The inner circulation air duct of the closed optical machine is relatively independent, so that the projection optical machine can effectively prevent dust particles in air from entering the inner circulation air duct and prevent the LCD screen from being polluted. In order to pursue higher brightness, the heat generated in the projector is also increased, so that the heat dissipation in the projector is more important. The traditional projection ray machine adopts a section radiator, and the heat exchange efficiency of the section radiator is poor, so that the temperature of the LCD screen is difficult to control.

In view of this, this application provides a single LCD projection light machine and projecting apparatus, aims at solving and adopts the section bar radiator in traditional projection light machine, and the heat exchange efficiency of section bar radiator is relatively poor, leads to the temperature of LCD screen to be difficult to the problem of control. Fig. 1 to fig. 6 are schematic structural diagrams of a single LCD projector according to an embodiment of the present application.

Referring to fig. 1 to 4, a single LCD projector 100 according to the present disclosure includes a housing 1, a heat exchanger 2, an inner circulation fan 3 and an outer circulation fan 4. The housing 1 is provided inside with at least a mounting cavity 11 for mounting the LCD screen 5. The heat exchanger 2 is arranged on the side wall of the shell 1, an inner circulation channel and an outer circulation channel which are not communicated with each other are arranged in the heat exchanger 2, a first air inlet and a first air outlet are arranged on the heat exchanger 2, and the opposite ends of the inner circulation channel are respectively communicated with the installation cavity 11 through the first air inlet and the first air outlet. The heat exchanger 2 is also provided with a second air inlet and a second air outlet, and the external circulation channel is communicated with the external environment through the second air inlet and the second air outlet respectively.

The inner circulation fan 3 is installed in the installation cavity 11, and the inner circulation fan 3 is configured to enable an air flow in the installation cavity 11 to flow through the LCD panel 5 and into the inner circulation passage. The outer circulation fan 4 is installed outside the housing 1, and the outer circulation fan 4 is configured to enable an external air flow to flow into the outer circulation passage.

In the technical scheme of the application, the single LCD projector 100 installs the LCD screen 5 through the installation cavity 11 in the housing 1, and exchanges heat between the air in the installation cavity 11 and the air outside through the internal circulation channel and the external circulation channel in the heat exchanger 2, so as to dissipate heat of the LCD screen 5. Specifically, the heat exchanger 2 communicates the internal circulation passage with the installation cavity 11 through the first air inlet and the first air outlet, so that when the internal circulation fan 3 causes the air flow in the installation cavity 11 to flow through the LCD panel 5 and into the first air inlet, the air flow enters the internal circulation passage. The heat exchanger 2 also enables the external circulation channel to be communicated with the external environment through the second air inlet and the second air outlet, so that when the external circulation fan 4 sends air towards the second air inlet or the second air outlet, external air flow can exchange heat with air flow in the installation cavity 11, and therefore heat is dissipated for the installation cavity 11. In this application, the external air flow and the air flow in the installation cavity 11 can continuously exchange heat when flowing, so the heat exchange efficiency is higher than that of the section radiator, and the temperature of the LCD screen 5 can be reduced to a greater extent.

Referring to fig. 1 to 2, in some embodiments, the housing 1 has a receiving cavity 12 that is not in communication with the mounting cavity 11, and a mounting notch 13 is formed through a sidewall of the housing 1 along the first direction X. The heat exchanger 2 is arranged in the mounting notch 13 and is connected to the side wall of the mounting notch 13 in a sealing way. The second air inlet and the second air outlet are opposite to each other along the first direction X, and the second air outlet is communicated with the external environment through the accommodating cavity 12.

In the present application, the first direction X is a relative direction, and the first direction X may be a relative direction between the second air inlet and the second air outlet, or may be a direction in which the mounting notch 13 penetrates the housing 1.

The heat exchanger 2 is mounted on the housing 1 through the mounting gap 13, and the mounting gap 13 is arranged through the housing 1 in the first direction X, so that the mounting gap 13 enables the mounting cavity 11 to communicate with the first air inlet and the first air outlet on the heat exchanger 2, respectively. At this time, the inner circulation fan 3 can continuously blow the air flow in the installation cavity 11 into the inner circulation channel to exchange heat, thereby radiating heat from the installation cavity 11 and the LCD screen 5.

Specifically, the casing 1 is further provided with a containing cavity 12, the containing cavity 12 is formed by enclosing the outside of the casing 1, the containing cavity 12 is used for installing a light cone support, and two ends of the light cone support are installed in the containing cavity 12 in a sealing mode, so that the containing cavity 12 is separated from the installation cavity 11. Therefore, in practical use, the mounting notch 13 penetrates the housing 1 in the first direction X, and the accommodating chamber 12 is in communication with the mounting chamber 11 again, but the heat exchanger 2 is mounted on the mounting notch 13 in a sealing manner, so that the accommodating chamber 12 can be separated from the mounting chamber 11 again.

In some embodiments, the heat exchanger 2 includes a plurality of fins arranged at intervals, an outer circulation channel is defined between each two adjacent fins, and an inner circulation channel is provided inside each fin.

The heat exchanger 2 defines an outer circulation passage between each adjacent two of the fins, and further defines an inner circulation passage in each of the fins. The inner and outer circulation channels are thus not separated by the entire fin but only by portions of a single fin. In practical application, the air flow in the installation cavity 11 flows in the inner circulation channel, the external air flow flows in the outer circulation channel, and the inner circulation channels are provided with a plurality of air flows, so that the heat exchange area between the air flow in the installation cavity 11 and the external air flow is relatively large, and the heat exchange efficiency is higher.

Referring to fig. 2 and 4, in some embodiments, each fin extends along the second direction Y, and the fins are arranged at intervals along the third direction Z. The extending direction of the internal circulation channel in each fin is respectively arranged at an angle with the first direction X and the second direction Y. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

The first fins are provided with inner circulation channels inside, and the first fins are arranged to extend in the second direction Y, so that the inner circulation channels can extend in the second direction Y. However, in practical application, when the extending direction of each inner circulation channel is set at an angle to the first direction X and the second direction Y, the length of the inner circulation channel in each fin will be longer, which will make the heat exchange area of each inner circulation channel and the outer circulation channel larger, so the heat exchange efficiency of the heat exchanger 2 will be further improved.

In some embodiments, the heat exchanger 2 further includes a body portion 21 mounted in the mounting recess 13, and a plurality of fins are disposed in an interior cavity of the body portion 21. The first air inlet and the first air outlet are respectively arranged on two opposite sides of the main body part 21 along the second direction Y. The second air inlet and the second air outlet are respectively arranged on two opposite sides of the main body part 21 along the first direction X. The first direction X and the second direction Y are perpendicular to each other.

The fins are distributed at intervals along the third direction Z, and the second air inlet and the second air outlet are oppositely arranged along the first direction X, so that the external circulation channel can be arranged along the first direction X in an extending mode. The first fins are provided with inner circulation channels inside, and the first fins are arranged to extend in the second direction Y, so that the inner circulation channels can extend in the second direction Y. It should be noted that, the first direction X and the second direction Y are perpendicular to each other, so the outer circulation channel and the inner circulation channel are disposed to cross each other, which makes the air flow in the outer circulation channel and the air flow in the inner circulation channel exchange heat sufficiently during the flowing process, and the heat exchange efficiency is higher.

Referring to fig. 3 to 6, in some embodiments, the mounting chamber 11 includes an annular chamber portion 111 disposed around an axis extending in the third direction Z, the heat exchanger 2 is disposed in a flow path of an air flow in the annular chamber portion 111, and the first air inlet and the first air outlet are respectively communicated with the annular chamber portion 111. The inner circulation fan 3 is mounted on the flow path of the air flow in the annular chamber portion 111.

In practical application, the inner circulation fan 3 can blow the air flow in the annular cavity part 111 by rotating, and the air flow can continuously flow around the annular cavity part 111 and continuously pass through the inner circulation channel to continuously exchange heat so as to dissipate heat of each electronic component in the mounting cavity 11.

In a specific application, the single LCD projector 100 uses a higher power light source to achieve higher brightness, and the heat generated by the light source is more, which causes the temperature of each electronic device of the single LCD projector 100 to rise together, so as to affect the normal operation of the electronic device. In this case, the LCD panel 5 is relatively greatly affected by the temperature rise, and therefore, it is necessary to preferentially radiate heat from the LCD panel 5. Thus, in some embodiments, the single LCD projector 100 further includes an LCD panel 5 and an insulating glass 6 disposed at opposite intervals along the second direction Y, and a partial annular cavity portion 111 is formed between the LCD panel 5 and the insulating glass 6. Wherein the second direction Y and the third direction Z are perpendicular to each other.

The inner circulation fan 3 can blow the air flow in the annular cavity part 111 by rotating, the air flow can continuously flow around the annular cavity part 111, and part of the annular cavity part 111 is formed between the LCD screen 5 and the heat insulation glass 6, so that the air flow can stably take away the heat of the LCD screen 5 to help the LCD screen 5 to dissipate the heat.

The installation chamber 11 includes the annular chamber portion 111 and other chambers into which the air flow may blow when the inner circulation fan 3 blows the air flow, resulting in a slower flow rate of the air flow in the annular chamber portion 111. Thus, in some embodiments, the housing 1 further comprises a flow guide portion provided within the annular cavity portion 111, the flow guide portion comprising a first portion extending towards the air outlet of the internal circulation fan 3 and a second portion extending towards the first air inlet, the flow guide portion being configured to be able to guide the air flow blown out from the internal circulation fan 3 to the first air inlet.

The shell 1 can guide the air flow blown out from the internal circulation fan 3 to the first air inlet through the flow guide part, so that the air flow flows around the annular cavity part 111, the speed of the air flow entering the internal circulation channel is accelerated, the heat exchange frequency of the air flow in the installation cavity 11 and the external air flow is increased, and the heat exchange efficiency of the heat exchanger 2 is further improved. In addition, the flow guiding part can also prevent the air flow from entering other chambers, and prevent the air flow from entering other chambers, so that the flow speed of the air flow is ensured to be relatively high, and the heat exchange efficiency of the heat exchanger 2 is relatively high.

In an embodiment of the present application, the external circulation fan 4 is disposed on the other side of the housing 1 opposite to the heat exchanger 2 along the first direction X, the external circulation fan 4 is configured as an intake fan, and the external circulation fan 4 is configured to be capable of drawing outside air into the heat exchanger 2 from the second intake.

The external circulation fan 4 sucks external air into the heat exchanger 2 from the second air inlet by rotating, so that the external air enters the external circulation channel to participate in subsequent heat exchange.

In an embodiment of the present application, the external circulation fan 4 is disposed towards the second air inlet of the heat exchanger 2, and the external circulation fan 4 is configured as an air blowing fan for blowing air towards the second air inlet. When the outer circulation fan 4 is set as the blowing fan, the outer circulation fan 4 can be directly arranged towards the second air inlet, so that air is directly blown towards the second air inlet, and external air enters the outer circulation channel to participate in subsequent heat exchange. The external circulation fan 4 is set to be an air suction fan or an air blowing fan, and can supply air towards the second air inlet, and can be specifically selected and adjusted according to the use requirement.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. A single LCD projector, comprising:

2. The single LCD projector as claimed in claim 1, wherein the housing has a receiving cavity which is not communicated with the mounting cavity, and a mounting notch is provided through a sidewall of the housing along a first direction;

3. The single LCD projector light machine according to claim 2, wherein the heat exchanger comprises a plurality of fins arranged at intervals;

4. The single LCD projector as claimed in claim 3, wherein each of the fins is extended along the second direction, and a plurality of the fins are arranged at intervals along the third direction;

5. The single LCD projector light machine according to claim 3, wherein said heat exchanger further comprises a main body portion mounted in said mounting notch, a plurality of said fins being disposed in an inner cavity of said main body portion;

the first direction and the second direction are perpendicular to each other.

6. The single LCD projector light machine of claim 1, wherein the mounting cavity comprises an annular cavity portion disposed about an axis extending in a third direction; the heat exchanger is arranged on a flow path of the air flow in the annular cavity part, and the first air inlet and the first air outlet are respectively communicated with the annular cavity part;

7. The single LCD projector as defined in claim 6, further comprising an LCD screen and a heat insulating glass disposed in opposition at intervals along a second direction, a portion of the annular cavity being formed between the LCD screen and the heat insulating glass;

8. The single LCD projector according to claim 6, wherein the housing further comprises a flow guide portion disposed within the annular cavity portion, the flow guide portion comprising a first portion extending toward the air outlet of the inner circulation fan and a second portion extending toward the first air inlet, the flow guide portion being configured to guide the air flow blown from the inner circulation fan to the first air inlet.

9. The single LCD projector according to claim 1, wherein the outer circulation fan is disposed on the other side of the housing with respect to the heat exchanger in a first direction, the outer circulation fan being configured as a suction fan configured to draw outside air into the heat exchanger from the second air inlet; or (b)

10. A projector comprising a single LCD projector as claimed in any one of claims 1 to 9.