CN215769309U

CN215769309U - Projector cooling system and projection equipment

Info

Publication number: CN215769309U
Application number: CN202120853209.8U
Authority: CN
Inventors: 文新柏; 刘宪; 吴锐
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2022-02-08
Anticipated expiration: 2031-04-23

Abstract

The embodiment of the application provides a projector cooling system and projection equipment, and belongs to the technical field of projection equipment. The projector cooling system comprises a sealing element, a control box, a light machine, a cooling assembly and a heat exchange assembly. The sealing element is provided with an accommodating cavity; the control box is connected with the sealing element and is positioned in the accommodating cavity, and the accommodating cavity is divided into a first space and a second space by the control box; the optical machine is connected with the sealing element and is positioned in the first space; the heat dissipation assembly comprises a first heat dissipation fan, the first heat dissipation fan is arranged in the accommodating cavity and is used for dissipating heat of the control box and the optical machine; the heat exchange assembly comprises a first heat exchanger, a second heat exchanger and a water cooling pipe, the first heat exchanger is located in the sealing piece and used for collecting heat and conducting the heat to the second heat exchanger, and the second heat exchanger is located outside the sealing piece and used for discharging the heat. The projector heat dissipation system achieves the purpose of heat dissipation of the optical machine under a sealed condition through water-cooling internal circulation, reduces maintenance frequency and reduces maintenance cost.

Description

Projector cooling system and projection equipment

Technical Field

The application belongs to the technical field of projection equipment, and more particularly relates to a projector cooling system and projection equipment.

Background

The optical machine is an important component of the projection equipment, and the optical machine comprises a plurality of key devices of the projection equipment, such as a spatial light modulator, a square rod and the like. Therefore, generally, the service life of the projection device is directly limited by the service life of the optical engine, and therefore, the maintenance cost of the projection device can be reduced by prolonging the service life of the optical engine and reducing the maintenance frequency of the optical engine.

Dust and temperature in the environment of the projection device during use and transportation have a large effect on the service life of the projector. However, the dust prevention and the heat dissipation are a pair of mutually contradictory influence factors, and if the optical machine is arranged in the closed space for dust prevention, the conventional heat dissipation of the optical machine in the closed space cannot be ensured, which leads to poor heat dissipation effect of the optical machine in operation and reduced service life. Similarly, if the optical machine is arranged in a structure with better heat dissipation, the influence of dust on precision devices in the optical machine cannot be guaranteed. Therefore, how to solve the problems of dust prevention and heat dissipation of the optical engine in the projection device at the same time is a problem that needs to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The present application provides a heat dissipation system for a projector and a projection apparatus, so as to improve the above problems.

The embodiment of the application can be realized as follows:

in a first aspect, a heat dissipation system for a projector is provided, which includes a sealing member, a control box, an optical engine, a heat dissipation assembly, and a heat exchange assembly. The sealing member has the holding chamber, and the control box is connected in the sealing member and is located the holding intracavity, and the control box separates the holding chamber for first space and second space, and wherein, the space outside the space in the holding chamber and the control box is first space, and the space in the control box is the second space. The optical machine is connected with the sealing element and is positioned in the first space; the heat dissipation assembly comprises a first heat dissipation fan, and the first heat dissipation fan is arranged in the accommodating cavity of the sealing element and used for simultaneously dissipating heat of the control box and the optical machine. The heat exchange assembly comprises a first heat exchanger, a second heat exchanger and a water cooling pipe connected between the first heat exchanger and the second heat exchanger, the first heat exchanger is located between the first cooling fan and the control box, the second heat exchanger is located outside the sealing piece, and the first heat exchanger is used for collecting heat of the first cooling fan, conducting the heat to the second heat exchanger and discharging the heat through the second heat exchanger.

Further, the water-cooling pipe includes first water-cooling pipe and second water-cooling pipe, and first heat exchange mouth and second heat exchange mouth have been seted up to the sealing member, and first heat exchanger fixed connection is in first radiator fan's air outlet for carry out the heat transfer to first radiator fan, first water-cooling pipe wear to locate first heat exchange mouth and first heat exchanger intercommunication, and the second water-cooling pipe wears to locate second heat exchange mouth and first heat exchanger intercommunication.

Further, the heat exchange assembly further comprises a cooling fan, and the cooling fan is connected with the second heat exchanger and is used for blowing out heat of the second heat exchanger.

Furthermore, the sealing element is provided with a first mounting hole and a second mounting hole, the first mounting hole is provided with lens glass, and the second mounting hole corresponds to the optical machine and is used for enabling the optical machine and the light source module to form a light path.

Further, the second space includes first chamber and the second chamber of partition setting, and the first wind channel of seting up with the first chamber intercommunication is imported and is located the intercommunicating pore of first chamber lateral wall to the control box, and the intercommunicating pore is used for first chamber and first space intercommunication, and first wind channel is imported, first chamber, intercommunicating pore and first space formation first circulation wind channel.

Further, the heat dissipation assembly further comprises a second heat dissipation fan, and the second heat dissipation fan is mounted in the communication hole.

Furthermore, the control box is further provided with a second air duct inlet and an air duct outlet which are communicated with two ends of the second cavity, and a control circuit board is arranged in the second cavity of the control box. The second air duct inlet, the second cavity, the air duct outlet and the first space form a second circulating air duct.

Further, still include the wind channel baffle, the wind channel baffle is connected in the lateral wall of control box, and separates first space for the third chamber, fourth chamber and the fifth chamber of intercommunication each other, and fourth chamber and fifth chamber are located the both sides of third chamber, and the ray apparatus is located the third chamber. The first air duct inlet, the first cavity, the communication hole, the third cavity and the fifth cavity are communicated and form a first circulating air duct, and the second air duct inlet, the second cavity, the air duct outlet, the fourth cavity and the fifth cavity are communicated and form a second circulating air duct.

Furthermore, the heat dissipation assembly further comprises a third heat dissipation fan, wherein the third heat dissipation fan is fixedly connected to the sealing element and located in the fifth cavity, and is used for enabling the air flow flowing through the first circulation air channel and the second circulation air channel to flow into the first heat dissipation fan through the third heat dissipation fan after converging.

Further, the ray apparatus includes the square rod subassembly, and the square rod subassembly includes the square rod and connects in the apron of square rod, and the apron is provided with heat radiation fins.

In a second aspect, a projection apparatus is provided, which includes a light source module and a projector heat dissipation system. The second mounting hole has been seted up to the sealing member, and light source module and second mounting hole sealing connection just are located the holding chamber of sealing member outside, and light source module and ray apparatus form the projection light path.

The projector cooling system that this application embodiment provided sets up in the holding intracavity of sealing member through sealing ray apparatus, control box, radiator unit, reduces inside external dust gets into the ray apparatus, realizes dustproof effect. Through setting up heat exchange assembly, and first heat exchanger sets up in the holding intracavity of sealing member, and the second heat exchanger sets up outside the holding chamber, through the water-cooled tube with first heat exchanger and second heat exchanger intercommunication, be favorable to concentrating the heat of holding intracavity and derive to the external world, realize the purpose of heat dissipation cooling. And then make the ray apparatus accomplish better heat dissipation under possessing better dustproof environment, be favorable to prolonging the life of ray apparatus, reduce and maintain the frequency, reduce the maintenance cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a heat dissipation system of a projector according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a sealing member in a heat dissipation system of a projector according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a control box in a heat dissipation system of a projector according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a first cooling fan in a heat dissipation system of a projector according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a third cooling fan in the heat dissipation system of the projector according to the embodiment of the present disclosure;

fig. 6 is a schematic diagram illustrating a principle of heat dissipation of a heat exchange assembly in a heat dissipation system of a projector according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a square bar assembly in an optical engine in a projector heat dissipation system according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a projection apparatus according to an embodiment of the present application.

Detailed Description

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

It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.

Since the service life of the optical engine directly determines the service life of the projection device, the dust and temperature in the environment where the optical engine is located need to be balanced to improve the service life of the optical engine.

At present, a sealed light path can be formed by adopting an isolation component, namely a square rod is positioned in the sealed light path, a light source is positioned outside the sealed light path, a heat exchanger can be arranged on the outer side wall of the isolation component, and heat is conducted to the outer side of the sealed light path through the heat exchanger so as to achieve the purpose of heat dissipation.

The inventor finds that the heat dissipation mode of the heat exchanger is an air cooling mode at present, and the heat conduction efficiency of the air cooling is low, the heat dissipation mode is single, and the heat exchanger is complex to install when being installed, so that the heat exchanger is not beneficial to popularization and application.

Different heat exchange modes can be set for different devices, for example, an optical machine in projection equipment, and the problem can be improved in a targeted manner.

Based on the above problems, the inventors propose a heat dissipation system for a projector. The service life of the optical machine is prolonged, the maintenance frequency is reduced, and the optical machine can have a good heat dissipation effect on the premise of meeting the requirement of dust prevention.

Referring to fig. 1, the heat dissipation system 100 of the projector may include a sealing member 110, a control box 120, an optical engine 130, a heat dissipation assembly and a heat exchange assembly 150.

The sealing element 110 is used to form a sealed space, and the control box 120, the optical machine 130 and the heat dissipation assembly are all installed in the sealed space of the sealing element 110.

When the optical machine 130 is hermetically disposed in the accommodating cavity of the sealing element 110, the optical machine 130 cannot directly exchange heat with the outside through air. The heat dissipation assembly includes a first heat dissipation fan 141, and the working principle of the heat dissipation fan is realized according to energy conversion, that is, electric energy is converted into mechanical energy, and then the mechanical energy is converted into kinetic energy. The heat dissipation fan dissipates heat in a forced heat convection mode, and takes away heat in a heat exchange mode with surrounding air under the action of flow guidance, so that the forced convection heat dissipation mode is realized. Therefore, the first heat dissipation fan 141 can generate a forced convection heat dissipation airflow, and the heat dissipation airflow can circulate in the enclosed space of the sealing member 110, and the heat exchange assembly 150 is used for guiding heat in the circulation airflow out of the enclosed space to reduce the temperature in the sealing member 110.

Specifically, the sealing member 110 has a receiving cavity that is completely sealed from the outside air.

The control box 120 is fixedly connected with the sealing element 110, and the control box 120 is located in the accommodating cavity of the sealing element 110. The control box 120 thus divides the housing chamber of the sealing member 110 into a first space and a second space.

The space enclosed by the control box 120, that is, the space inside the control box, is the second space, and the other spaces inside the accommodating cavity and outside the control box, are the first spaces.

When the optical machine 130 and the first cooling fan 141 are installed in the accommodating cavity of the sealing element 110, and the optical machine 130 and the first cooling fan 141 are located in the first space of the accommodating cavity. The first heat dissipation fan 141 may dissipate heat of the control box 120 and the optical machine 130 at the same time, that is, the first heat dissipation fan 141 may blow air to the first space and the second space at the same time, so that the generated air flow may be divided into a first air flow and a second air flow.

With continued reference to fig. 1, the heat exchange assembly 150 may include a first heat exchanger 151, a second heat exchanger 153, and a water cooling pipe 155 connected between the first heat exchanger 151 and the second heat exchanger 153.

When being installed, the first heat exchanger 151 is fixedly connected in the accommodating cavity of the sealing member 110 and is located between the first cooling fan 141 and the control box 120. The second heat exchanger 153 is connected to the outside of the receiving cavity of the sealing member 110, connects the first heat exchanger 151 and the second heat exchanger 153 by a water cooling pipe 155, and forms a water cooling cycle.

Besides the heat dissipation assembly, the projector can also comprise a heat dissipation component of the whole projector. In another alternative embodiment, the first heat exchanger 151 is fixedly connected to the accommodating cavity of the sealing member 110 and located between the first heat dissipation fan 141 and the control box 120, and the second heat exchanger may be disposed in a heat dissipation component of the whole machine.

Meanwhile, the water cooling pipe 155 is connected between the first heat exchanger 151 and the second heat exchanger 153, and a water pump may be further provided at an intermediate position of the water cooling pipe, and the water pump is used to provide power to circulate the water flow.

The first heat exchanger 151 is used for collecting heat in the accommodating cavity of the sealing element 110 and conducting the heat to a second heat exchanger 153 outside the sealing element 110 through a water cooling pipe 155, so that the heat is exhausted from the closed space of the sealing element 110 through the water cooling pipe 155 and the second heat exchanger 153.

Further, with continued reference to fig. 1, the heat dissipation system 100 of the projector according to the embodiment of the present disclosure may further include a bottom plate 102, where the bottom plate 102 is used as a carrier, and the sealing member 110 and the second heat exchanger 153 may be respectively and fixedly connected to the bottom plate 102, so that the heat dissipation system is used as an integral component and is conveniently installed in the projector.

Specifically, referring to fig. 2, a schematic structural diagram of a sealing element 110 in the heat dissipation system 100 of the projector according to the embodiment of the present disclosure is shown.

The seal 110 may include a tank body 112 and a seal cover 114.

The box body 112 may be a sheet metal shell, and the box body 112 includes a front side plate 1120 and a rear side plate 1122 which are oppositely disposed.

When the box is installed, the box body 112 is fixedly connected to the bottom plate 102, and the sealing cover 114 can be fixedly connected to the top of the box body 112 through screws, so as to enclose a closed accommodating cavity.

It will be appreciated that in alternative embodiments, the tank body 112 may be a through-top and bottom shell structure, the tank body is fixed to the bottom plate 102 by screws during installation, and the sealing cover 114 is fixedly connected to the top of the tank body 112, i.e. the bottom plate 102 and the sealing cover 114 close the tank body 112.

Since the optical engine 130 is installed in the accommodating cavity of the sealing member 110, and the light source module 210 is installed outside the accommodating cavity of the sealing member 110, the optical engine 130 and the light source module 210 need to form a projection light path. Therefore, the first mounting hole may be formed in the front plate 1120 and the second mounting hole 1125 may be formed in the rear plate 1122 of the sealing member 110.

The lens glass 1127 can be mounted in the first mounting hole, and the whole circle of glue is dispensed on the outer periphery of the lens glass 1127, so that the aims of sealing the whole lens glass 1127 and isolating external dust and impurities are fulfilled. The opening position of the second mounting hole 1125 needs to be matched with the optical engine 130 and the light source module 210, so that the optical engine 130 and the light source module 210 form a light path through the second mounting hole 1125.

Optionally, the rear side plate 1122 of the sealing member 110 may be provided with a recessed portion, and the position and size of the recessed portion are matched with the light-emitting connection position and size of the light source module 210 to be installed, so as to ensure that the light emitted from the light source module 210 can all be irradiated into the light engine 130. The second mounting hole 1125 may be opened in the recess to facilitate the subsequent mounting of the light source module 210.

In order to further enhance the sealing effect, optionally, sealing gaskets are disposed at the joints between the sealing cover 114 and the box body 112, between the box body 112 and the bottom plate 102, between the box body 112 and the lens glass 1127, and between the box body 112 and the light source module 210.

Through setting up sealed the pad to ensure that dust can not get into the holding intracavity from the junction between two parts.

In addition, with continued reference to fig. 2, the rear plate 1122 of the sealing member 110 may be further provided with a heat exchanging port 115, and the heat exchanging port 115 is adapted to mate with the water cooling tube 155. The water cooling pipe 155 is connected to the heat exchanging port 115, so that the first heat exchanger 151 located inside the accommodating cavity of the sealing member 110 and the second heat exchanger 153 located outside the sealing member 110 can be communicated with each other, thereby achieving the purpose of heat exchange.

Specifically, referring to fig. 3, a schematic structural diagram of a control box 120 in the heat dissipation system 100 of the projector according to the embodiment of the present disclosure is shown.

The control box 120 is a hollow box structure, the control box 120 is installed in the accommodating cavity of the sealing element 110, and a space inside the control box 120 is a second space.

Referring to fig. 1 and 3, a baffle is disposed in the control box 120, and the baffle divides a second space in the control box 120 into a first chamber 121 and a second chamber 122.

Alternatively, the baffle may include a vertically disposed arc plate and a horizontally disposed divider plate (not shown), the arc plate being connected between the divider plate and the sealing cover 114, thereby dividing the second space into two cavities. A communication hole may be formed in a side wall of the first chamber 121, a second heat dissipation fan 143 is installed in the first chamber 121, and an air outlet of the second heat dissipation fan 143 is communicated with the communication hole.

In alternative embodiments, the baffle may have other configurations, such as an integral arcuate plate. In the view of fig. 3, the longitudinal section of the baffle may be a quarter-circle arc or other arc-shaped structure with reference to the longitudinal section of the control box. The cross-section of the baffle may include a straight line segment and a circular arc segment that are connected, with reference to the cross-section of the control box.

A control circuit board may be disposed in the second chamber 122 of the control box 120 to electrically connect various external interfaces.

The control circuit board has a certain heat dissipation requirement for heat dissipation, and because the space of the second cavity 122 is large, and the requirement of the control circuit board for the wind speed is smaller than that of the DMD module 131, the heat dissipation requirement of the control circuit board can be met by setting two low-power heat dissipation fans.

The control box 120 may include a front plate, a rear plate, and an inner side plate between the front plate and the rear plate. When the control box 120 is installed in the accommodating cavity of the sealing member 110, the front plate is close to the first heat dissipation fan 141 relative to the rear plate, and the inner side plate is close to the side plate of the optical engine 130.

The front plate is provided with a first air duct inlet 1201 and a second air duct inlet 1205 arranged at intervals along the vertical direction. Wherein the first air duct inlet 1201 communicates with the first chamber 121 and the second air duct inlet 1205 communicates with the second chamber 122.

Meanwhile, the inner side plate is provided with a communication hole for communicating the first cavity 121 and the first space, and the rear plate is provided with an air duct outlet for communicating the second cavity 122 and the first space.

When the first heat dissipation fan 141 is turned on, the airflow blown by the first heat dissipation fan 141 may be divided into a first airflow and a second airflow.

The first air flow can enter from the first air duct inlet 1201, flow through the first cavity 121 and then flow into the first space from the communication hole, and can dissipate heat of the optical machine 130. A second airflow may enter from a second duct inlet 1205, flow through the second chamber 122, and flow into the first space from the duct outlet. The second airflow may cool the control circuit board located in the second chamber 122.

In other words, by disposing the control box 120 in the accommodating cavity of the sealing member 110 and disposing the baffle plate in the control box 120, the first air duct inlet 1201, the first cavity 121, the communication hole, and the first space can form the first circulating air duct 104; the second duct inlet 1205, the second chamber 122, the duct outlet, and the first space form a second circulating duct 106.

Referring to fig. 4, a schematic structural diagram of the first heat dissipation fan 141 is shown.

The first heat dissipation fan 141 may include a high power fan and a low power fan.

The large-power fan has large diameter and large air volume; the small-power fan has small diameter and relatively small air volume. One high power fan and two low power fans arranged side by side may be used, the high power fan being located above the two low power fans arranged side by side.

Most of the airflow generated by the high power fan enters the optical engine 130 from the first air duct inlet 1201 through the first cavity 121 to form the first circulating air duct 104. Most of the air flow generated by the two low-power fans enters the second cavity 122 of the control box 120 through the second air duct inlet 1205, so as to cool the control circuit board located in the control box 120, and form the second circulating air duct 106.

The first heat dissipation fan 141 is a main driving force of the air flow in the first circulation air duct 104 and the second circulation air duct 106. Therefore, the first heat exchanger 151 may be disposed at an air outlet of the first heat dissipation fan 141, which is beneficial to improving heat conduction efficiency inside the accommodating cavity.

Further, as shown in fig. 1, the optical engine 130 may include a DMD module 131 and a square bar assembly 133.

The DMD module 131 and the square rod assembly 133 are both installed in the accommodating cavity of the sealing member 110, and the DMD module 131 and the control box 120 are disposed adjacent to each other. When the first airflow is blown out from the first cavity 121 and passes through the first space, the first airflow may flow through the DMD module 131 while taking away heat of the DMD module 131.

In order to make the first air flow better dissipate heat of DMD module 131 and the second air flow better dissipate heat of control circuit board, optionally, the heat dissipation system 100 of projector may further include a duct partition 160.

The duct partition 160 is connected to an outer side wall of the control box 120, and may partition the first space into a third chamber 123, a fourth chamber 124, and a fifth chamber 125, which are communicated with each other.

The fourth cavity 124 and the fifth cavity 125 are respectively located at two sides of the third cavity 123, and the optical machine 130 is installed in the third cavity 123.

Specifically, the duct partition 160 may include a first plate and a second plate. The first plate is connected to the front plate of the control box 120 and sleeved outside the lens, the second plate is connected to the rear plate of the control box 120, the third cavity 123 can be isolated by the first plate and the second plate, and the size and position of the third cavity 123 correspond to the DMD module 131. The fourth chamber 124 is a space enclosed by the second plate and the rear side plate 1122 of the sealing member 110. The fifth cavity 125 is a space enclosed by the first plate and the front plate 1120 of the sealing member 110. And the third chamber 123, the fourth chamber 124 and the fifth chamber 125 communicate on a side away from the control box 120 so that the first air flow flowing out of the third chamber 123 and the second air flow flowing out of the fourth chamber 124 can be merged in the fifth chamber 125.

Referring to fig. 1, the first air duct inlet 1201, the first cavity 121, the communication hole, the third cavity 123 and the fifth cavity 125 are communicated to form the first circulating air duct 104. Second air duct inlet 1205, second chamber 122, duct outlet, fourth chamber 124, and fifth chamber 125 communicate and form second circulating air duct 106.

The airflow blown by the first heat dissipation fan 141 is divided into a first airflow and a second airflow at the front panel 1120 of the control box 120. The first air flow passes through the first circulating air duct 104, and the second air flow passes through the second circulating air duct 106.

That is, the first airflow enters the first cavity 121 of the control box 120 from the first air duct inlet 1201, flows through the first cavity 121 and enters the third cavity 123 from the communication hole, so as to cool the DMD module 131 located in the third cavity 123, and then enters the fifth cavity 125 from the third cavity 123.

The second air flow enters the second cavity 122 of the control box 120 through the second air duct inlet 1205, and can cool the control circuit board located in the second cavity 122, flows through the second cavity 122, enters the fourth cavity 124 through the air duct outlet, then enters the fifth cavity 125 through the fourth cavity 124, and the first air flow and the second air flow converge in the fifth cavity 125 and return to the first cooling fan 141 to form a circulation loop after converging.

Under the separation effect of control box 120 and wind channel baffle, form two circulation wind channels that can communicate, and first circulation wind channel 104 can dispel the heat the cooling to DMD module 131 and square bar subassembly 133, and second circulation wind channel 106 can dispel the heat the cooling to the control circuit board in the control box 120.

In order to accelerate the first air flow from the communication hole into the third chamber 123, the DMD module 131 is cooled. Optionally, the heat dissipation assembly may further include a second heat dissipation fan 143.

The second heat dissipation fan 143 is installed at a communication hole of the control box 120, that is, at a connection position between the control box 120 and the DMD module 131, and after the first air flow is further accelerated by the second heat dissipation fan 143, the air flow speed in the first circulation air duct 104 is accelerated, so that the DMD module 131 and the square rod assembly 133 can be effectively cooled.

Since the communication hole is opened in the inner side plate of the control box 120, the airflow velocity is reduced by the change in the flow direction of the first airflow when the first airflow flows through the first chamber 121 and flows out of the communication hole. In order to accelerate the flow rate of the first air flow, the second heat dissipation fan 143 may be optionally installed at the position of the communication hole to accelerate the first air flow before entering the DMD module 131.

When the first airflow and the second airflow merge in the fifth chamber 125, since the fifth chamber 125 has a corner position, the merged airflow loses energy at the corner position, resulting in a decrease in the airflow speed.

In order to accelerate the flow of the merged fluid back to the first heat dissipation fan 141, optionally, the heat dissipation assembly may further include a third heat dissipation fan 145, so that the merged airflow may maintain a faster flow speed under the action of the third heat dissipation fan 145.

Referring to fig. 5, a schematic structural diagram of the third heat dissipation fan 145 is shown.

The third heat dissipation fan 145 is fixedly connected to the sealing member 110 and located at the position of the fifth cavity 125, that is, the third heat dissipation fan 145 is located at the junction of the first circulating air duct 104 and the second circulating air duct 106.

When mounted, the third heat dissipation fan 145 is fixed to the case body 112 of the sealing member 110 by the fan bracket.

The third heat dissipation fan 145 may include two vertically arranged heat dissipation fans, and the two heat dissipation fans may accelerate the air flow after the first circulation air duct 104 and the second circulation air duct 106 converge, and send the air flow to the position of the first heat dissipation fan 141.

The projector heat dissipation system 100 according to the embodiment of the present disclosure is provided with a first heat dissipation fan 141, a second heat dissipation fan 143, a third heat dissipation fan 145, a sealing element 110, and an air duct partition, which together form two circulating air ducts.

The first heat dissipation fan 141, the second heat dissipation fan 143, and the third heat dissipation fan 145 can dissipate heat for the DMD module 131, the square bar assembly 133, the circuit board in the control box 120, and other components at the same time.

Referring to fig. 1 and fig. 6 together, fig. 6 is a schematic diagram illustrating a heat dissipation principle of the heat exchange assembly 150.

First heat exchanger 151 fixed connection plays the heat transfer effect in first radiator fan 141's air outlet position, and the air current that first radiator fan 141 blew out is behind first heat exchanger 151, and hot-blast can be converted into cold wind, is favorable to taking away the heat in DMD module 131 and the square bar module.

The second heat exchanger 153 is fixedly connected to the base plate 102 and located at a rear position outside the accommodating cavity of the sealing member 110.

Water cooling tubes 155 may include a first water cooling tube 1551 and a second water cooling tube 1553.

The first water-cooling pipe 1551 and the second water-cooling pipe 1553 are both connected between the first heat exchanger 151 and the second heat exchanger 153, wherein the first water-cooling pipe 155 is a water inlet pipe, and the second water-cooling pipe 155 is a water outlet pipe, so that a circulating water cooling system is formed.

As shown in fig. 2, a first heat exchange port 1152 and a second heat exchange port 1154 may be formed on a side wall of the sealing member 110 corresponding to the first water cooling tube 1551 and the second water cooling tube 1553.

The first water-cooling pipe 1551 is arranged through the first heat exchange port 1152, and the second water-cooling pipe 1553 is arranged through the second heat exchange port 1154. Alternatively, the first water cooling tube 1551 is in communication with the first heat exchange port 1152 and the second water cooling tube 1553 is in communication with the second heat exchange port 1154.

Specifically, one end of a first water-cooling tube 1551 penetrates through the first heat exchange port 1152 to be communicated with the first heat exchanger 151, and the other end of the first water-cooling tube 1551 is communicated with the second heat exchanger 153; one end of a second water cooling pipe 1553 penetrates through the second heat exchange port 1154 to be communicated with the first heat exchanger 151, and the other end of the second water cooling pipe 1553 is communicated with the second heat exchanger 153.

Further, the heat exchange assembly 150 may further include a heat exchange fan 157. The heat exchange fan 157 is connected to the second heat exchanger 153 and is configured to blow out heat in the second heat exchanger 153.

After hot air blown by the first cooling fan 141 passes through the first heat exchanger 151, heat is absorbed by the first heat exchanger 151 to form cold air, the first heat exchanger 151 conducts the heat to the second heat exchanger 153 through the second water-cooling pipe 1553, and the heat in the second heat exchanger 153 is blown out through the heat exchange fan 157.

The first heat exchanger 151 is used for exchanging heat for air flow blown out by the first cooling fan 141, after heat exchange, the water temperature in the second water-cooling pipe 1553 rises, the water flow conducts heat to the second heat exchanger 153, the heat exchange fan 157 can blow out heat in the second heat exchanger 153, so that the water temperature is reduced, and the water flow with the reduced temperature flows back into the first heat exchanger 151 through the first water-cooling pipe 1551 to perform water cooling circulation.

Referring to fig. 1 and 7, the square rod assembly 133 is used for transmitting the light emitted from the light source module to the optical engine 130, and the square rod assembly 133 is connected to the light path between the DMD module 131 and the light source module.

The square rod assembly 133 may include a square rod 1330, a square rod holder 1331, a square rod cover 1333 and a light inlet cover 1337. The square rod 1330 is fixedly connected to the square rod bracket 1331, and the square rod cover plate 1333 is fixedly covered on the square rod 1330 through a locking screw for protecting the square rod 1330. The light inlet shroud 1337 is fixedly connected to one side of the square rod support 1331 near the light source module.

Optionally, the square rod cover plate 1333 is provided with heat dissipation fins 1335 for increasing the heat dissipation area, so as to improve the heat dissipation efficiency of the square rod.

In the heat dissipation system 100 of the projector provided in the embodiment of the present application, the sealing element 110 having a closed space is disposed, and the control box 120 and the optical engine 130 are respectively and fixedly connected to the accommodating cavities of the sealing element 110. Through setting up ray apparatus 130 in inclosed holding intracavity, it is inside to reduce external dust to get into ray apparatus 130, and then influences the normal work of each optical parts in ray apparatus 130, realizes sealed dirt-proof purpose.

Meanwhile, a heat dissipation assembly is disposed in the accommodating cavity, and the control box 120 and the optical machine 130 are dissipated heat through the heat dissipation assembly, so that a circulating heat dissipation air duct is formed inside the accommodating cavity. Finally, the heat exchange assembly 150 is arranged to intensively conduct out the heat in the accommodating cavity. The heat dissipation assembly and the heat exchange assembly 150 are arranged in a matched mode, heat in the accommodating cavity is led out to the outside in a centralized mode, and the purposes of heat dissipation and cooling are achieved.

Especially for the optical engine 130 in the cinema projector, the heat dissipation of the optical engine 130 (especially the DMD module 131 and the square bar assembly 133, which have high power density and heat concentration) is especially important because the cinema product has high brightness and high power. So that the optical machine 130 can dissipate heat under a better dustproof environment.

It can be understood that the projector heat dissipation system 100 provided in the embodiment of the present application can be applied to cinema projectors and engineering projector products requiring low maintenance frequency of optical machines.

Referring to fig. 8, an embodiment of the application further provides a projection apparatus 200.

The projection device 200 may include the light source module 210 and the projector heat dissipation system 100 described above.

As shown in fig. 2, a second mounting hole 1125 is formed in the rear side plate 1122 of the sealing element 110, the light source module 210 is connected to the second mounting hole 1125 in a sealing manner, the connected light source module 210 is located outside the accommodating cavity of the sealing element 110, and the light source module 210 corresponds to the square rod assembly 133 to form a required projection light path.

The projection apparatus 200 provided in the embodiment of the present application has the projector heat dissipation system 100 described above, and achieves the purpose of heat dissipation of the optical machine 130 through water-cooling internal circulation under a sealed condition, so that the optical machine 130 reduces the maintenance frequency and the maintenance cost through a dustproof heat dissipation manner.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A heat dissipation system for a projector, comprising:

a seal having a receiving cavity;

the control box is connected to the sealing element and located in the containing cavity, and divides the containing cavity into a first space and a second space, wherein the space inside the containing cavity and outside the control box is the first space, and the space inside the control box is the second space;

the optical machine is connected to the sealing piece and located in the first space;

the heat dissipation assembly comprises a first heat dissipation fan, and the first heat dissipation fan is arranged in the accommodating cavity of the sealing element and is used for simultaneously dissipating heat of the control box and the optical machine; and

the heat exchange assembly comprises a first heat exchanger, a second heat exchanger and a water cooling pipe connected between the first heat exchanger and the second heat exchanger, the first heat exchanger is located between the first cooling fan and the control box, the second heat exchanger is located outside the sealing piece, and the first heat exchanger is used for collecting heat of the first cooling fan and conducting the heat to the second heat exchanger, and the heat is discharged through the second heat exchanger.

2. The heat dissipation system of claim 1, wherein the water-cooled tube comprises a first water-cooled tube and a second water-cooled tube, the sealing member defines a first heat exchange opening and a second heat exchange opening, the first heat exchanger is fixedly connected to an air outlet of the first heat dissipation fan and is configured to exchange heat with the first heat dissipation fan, the first water-cooled tube is disposed through the first heat exchange opening and is communicated with the first heat exchanger, and the second water-cooled tube is disposed through the second heat exchange opening and is communicated with the first heat exchanger.

3. The heat dissipation system of claim 1, wherein the heat exchange assembly further comprises a heat dissipation fan connected to the second heat exchanger and configured to blow heat out of the second heat exchanger.

4. The heat dissipation system of claim 1, wherein the sealing member defines a first mounting hole and a second mounting hole, the first mounting hole is configured with lens glass, and the second mounting hole corresponds to the optical engine, so that the optical engine and the light source module form a light path.

5. The heat dissipation system of claim 1, wherein the second space includes a first chamber and a second chamber separately disposed, the control box is opened with a first air duct inlet communicating with the first chamber and a communication hole located on a side wall of the first chamber, the communication hole is used for communicating the first chamber with the first space, and the first air duct inlet, the first chamber, the communication hole and the first space form a first circulating air duct.

6. The heat dissipating system of a projector as claimed in claim 5, wherein the heat dissipating module further comprises a second heat dissipating fan mounted to the communication hole.

7. The heat dissipation system of claim 5, wherein the control box further defines a second air duct inlet and an air duct outlet that are communicated with two ends of the second cavity, a control circuit board is disposed in the second cavity of the control box, and the second air duct inlet, the second cavity, the air duct outlet and the first space form a second circulating air duct.

8. The heat dissipation system of claim 7, further comprising an air duct partition plate connected to an outer sidewall of the control box and dividing the first space into a third chamber, a fourth chamber, and a fifth chamber that are communicated with each other, wherein the fourth chamber and the fifth chamber are located at two sides of the third chamber, and the optical engine is located in the third chamber;

the first air duct inlet, the first cavity, the communication hole, the third cavity and the fifth cavity are communicated and form the first circulating air duct, and the second air duct inlet, the second cavity, the air duct outlet, the fourth cavity and the fifth cavity are communicated and form the second circulating air duct.

9. The heat dissipation system of claim 8, wherein the heat dissipation assembly further comprises a third heat dissipation fan, the third heat dissipation fan is fixedly connected to the sealing member and located in the fifth cavity, and the third heat dissipation fan is configured to converge the airflows flowing through the first circulation air channel and the second circulation air channel and then flow into the first heat dissipation fan through the third heat dissipation fan.

10. The heat dissipation system of any one of claims 1-9, wherein the light engine comprises a square bar assembly, the square bar assembly comprising a square bar and a cover plate connected to the square bar, the cover plate being provided with heat dissipation fins.

11. A projection device, comprising:

a light source module; and

the heat dissipation system of any of claims 1-10, wherein the sealing element defines a second mounting hole, the light source module is hermetically connected to the second mounting hole and located outside the accommodating cavity of the sealing element, and the light source module and the optical engine form a projection light path.