CN219831601U - Projector - Google Patents

Abstract

The utility model relates to the technical field of projection equipment, and discloses a projector, which comprises an optical element, and the projector further comprises: the fan mechanism comprises an air inlet and an air outlet, and the air outlet is opposite to the optical element; the refrigeration mechanism comprises a semiconductor refrigerator and a cold surface heat exchanger, wherein the semiconductor refrigerator comprises a refrigeration surface and a heating surface which are oppositely arranged, the cold surface heat exchanger is attached to the refrigeration surface, and the cold surface heat exchanger is arranged at the air inlet. After the semiconductor refrigerator of above-mentioned projecting apparatus is circular telegram, cold face heat exchanger can reduce air temperature, and the air temperature that gets into the air intake promptly reduces to reduce the influence of ambient temperature to the projecting apparatus, need not to pull up the rotational speed of fan mechanism in order to reduce the temperature, thereby reduce noise, solve the big problem of the operational noise of projecting apparatus among the prior art.

Description

Projector

Technical Field

The present disclosure relates to projection devices, and particularly to a projector.

Background

During use of LCD projectors, optical lenses, display elements, etc. generate a lot of heat. In order to perform good heat dissipation, the LCD projector is generally designed by adopting a direct current blower with high wind pressure to be matched with a special air duct so as to accurately deliver air flow to an optical lens and a display element, thereby taking away heat and enabling the working temperature of the LCD projector to be in a controllable range.

At present, as the luminous flux of the optical machine of the LCD projector is higher, the heat generated by the optical lens and the display element is increased during the use process, and at this time, if the volume of the optical machine is not synchronously increased, the air flow through the optical lens and the display element needs to be increased to take more heat and maintain the normal working temperature. However, increasing the air flow rate requires an increase in the air flow rate of the blower, i.e., a higher rotational speed of the blower, an increase in noise, and a decrease in competitiveness and practicality of the product.

Disclosure of Invention

In view of the above, the present utility model provides a projector to solve the problem of high working noise of the projector in the prior art.

An embodiment of the present utility model proposes a projector including an optical element, the projector further including:

the fan mechanism comprises an air inlet and an air outlet, and the air outlet is opposite to the optical element;

the refrigeration mechanism comprises a semiconductor refrigerator and a cold surface heat exchanger, wherein the semiconductor refrigerator comprises a refrigeration surface and a heating surface which are oppositely arranged, the cold surface heat exchanger is attached to the refrigeration surface, and the cold surface heat exchanger is arranged at the air inlet.

In an embodiment, the cold-surface heat exchanger comprises a plurality of heat exchange plates extending along the first direction and arranged at intervals, and a heat exchange gap is formed between any two adjacent heat exchange plates and is arranged towards the air inlet.

In an embodiment, the refrigeration mechanism further comprises a hot-face radiator and a hot-face radiator fan which are connected, the hot-face radiator is attached to the heating face, and the hot-face radiator fan is arranged on the periphery of the hot-face radiator.

In an embodiment, the projector further comprises a housing, a first opening and a second opening are formed in the housing, the fan mechanism and the cold-face heat exchanger are both contained in the housing, the semiconductor refrigerator is arranged on the housing and located at the first opening, the hot-face radiator fan and the optical element are all located outside the housing, the hot-face radiator and the first opening are arranged oppositely, and the optical element is arranged at the second opening.

In an embodiment, the projector further comprises a light source radiator and a drainage piece, the light source radiator and the cold surface heat exchanger are arranged at intervals, the drainage piece comprises a first end and a second end which are opposite, the first end is arranged on one side, facing the air inlet, of the cold surface heat exchanger, the second end is arranged on the light source radiator, and the drainage piece is used for guiding condensed water on the cold surface heat exchanger to the light source radiator.

In an embodiment, a projected length of an end of the heat exchange fin toward the semiconductor refrigerator in the first direction is greater than a projected length of an end of the heat exchange fin away from the semiconductor refrigerator in the first direction; and each heat exchange plate is provided with a mounting hole, and the drainage piece sequentially penetrates through a plurality of mounting holes.

In one embodiment, the second end is flat.

In an embodiment, the projector further includes a functional layer disposed on the light source radiator, the second end is attached to the functional layer, and the functional layer is used for adsorbing condensed water.

In one embodiment, the drainage member is a PVA cotton swab; the functional layer includes at least one of a hydrogel film and a sponge.

In an embodiment, the projector further comprises an insulating sleeve, wherein the insulating sleeve is sleeved on the drainage piece and exposes the first end and the second end.

Above-mentioned projecting apparatus includes optical element, fan mechanism and refrigerating mechanism, and refrigerating mechanism includes semiconductor refrigerator and cold face heat exchanger, because cold face heat exchanger locates air intake department, then after the semiconductor refrigerator circular telegram, cold face heat exchanger can reduce air temperature, and the air temperature who gets into the air intake promptly reduces to reduce the influence of ambient temperature to the projecting apparatus, need not to pull up the rotational speed of fan mechanism in order to reduce the temperature, thereby reduce noise, solve the big problem of the operational noise of projecting apparatus among the prior art.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a projector according to an embodiment of the utility model;

FIG. 2 is an exploded perspective view of the projector of FIG. 1 at another angle;

FIG. 3 is a schematic perspective view of a blower mechanism in the projector of FIG. 1;

FIG. 4 is a perspective view of a blower, a refrigeration mechanism, a flow guide, a light source radiator, and a light source radiator fan in the projector of FIG. 1;

fig. 5 is a schematic perspective view of a cold face heat exchanger in the projector of fig. 2.

The meaning of the labels in the figures is:

100. a projector;

10. an optical element;

20. a fan mechanism; 201. an air inlet; 202. an air outlet; 21. a blower; 22. an air duct;

30. a refrigeration mechanism; 31. a semiconductor refrigerator; 311. refrigerating the noodles; 312. heating surface; 32. a cold face heat exchanger; 321. a heat exchange plate; 322. a heat exchange substrate; 323. a mounting hole; 33. a hot-side radiator; 34. a heat-face heat-dissipating fan;

40. a housing; 41. a first opening; 42. a second opening;

50. a light source radiator; 51. a heat sink;

60. a light source heat radiation fan;

70. a drainage member; 701. a first end; 702. a second end;

80. a functional layer;

90. an insulating sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be further described in detail below with reference to the accompanying drawings, i.e., embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements 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 utility model.

Furthermore, the terms "first," "second," and the like, 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 one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In order to describe the technical scheme of the utility model, the following description is made with reference to specific drawings and embodiments.

The embodiment of the utility model provides a projector, which reduces the influence of ambient temperature by controlling the air inlet temperature in a certain range, thereby reducing the influence of noise increase on the performance of the whole projector as much as possible.

Referring to fig. 1 to 4, in one embodiment of the present utility model, a projector 100 includes an optical element 10, a blower mechanism 20, and a cooling mechanism 30.

The blower mechanism 20 includes an air inlet 201 and an air outlet 202, and the air outlet 202 is disposed opposite to the optical element 10. In this way, the air blown out through the air outlet 202 cools the optical element 10.

The refrigeration mechanism 30 comprises a semiconductor refrigerator 31 and a cold surface heat exchanger 32, the semiconductor refrigerator 31 comprises a refrigeration surface 311 and a heating surface 312 which are oppositely arranged, the cold surface heat exchanger 32 is attached to the refrigeration surface 311, and the cold surface heat exchanger 32 is arranged at the air inlet 201. That is, the air sucked by the air inlet 201 is cooled by the cold-surface heat exchanger 32, so that the temperature of the air blown to the optical element 10 can be reduced, and the fan rotation speed does not need to be increased.

It will be appreciated that when the semiconductor refrigerator 31 is powered on, the peltier effect is utilized to make the temperature of the cooling surface 311 lower than room temperature and the temperature of the heating surface 312 higher than room temperature, and at this time, the cooling surface 311 exchanges heat with the air to be introduced into the air inlet 201 by the cold surface heat exchanger 32, so that the temperature of the intake air can be reduced. Thus, a lower air inlet temperature can be obtained to cool the optical element 10, thereby achieving the effects of reducing the working temperature of the optical element 10, reducing the rotating speed of the fan mechanism 20 and reducing the noise of the whole machine.

The projector 100 includes the optical element 10, the fan mechanism 20 and the refrigerating mechanism 30, the refrigerating mechanism 30 includes the semiconductor refrigerator 31 and the cold-surface heat exchanger 32, and since the cold-surface heat exchanger 32 is disposed at the air inlet 201, after the semiconductor refrigerator 31 is electrified, the cold-surface heat exchanger 32 can reduce the air temperature, i.e. the air temperature entering the air inlet 201 is reduced, thereby reducing the influence of the ambient temperature on the projector 100, and reducing the noise by not increasing the rotation speed of the fan mechanism 20 to reduce the temperature, thereby solving the problem of large working noise of the projector in the prior art.

The optical element 10 includes an LCD (liquid crystal display ) optical lens, a display element, and the like, among others. In addition, the blower mechanism 20 includes a blower 21 and an air duct 22 connected to each other, wherein an air inlet of the blower 21 is an air inlet 201 of the blower mechanism 20, one end of the air duct 22 is communicated with an air outlet of the blower 21, and the other end of the air duct is an air outlet 202 of the blower mechanism 20. The air duct 22 is arc-shaped, so that the air outlet direction can be changed according to the actual use requirement to cool the optical element 10.

It will be appreciated that the use of the cooling mechanism 30 to control the intake air temperature allows active control of the intake air temperature over a range, reduces the effects of ambient temperature, allows full power operation of the optical element 10, and reduces the magnitude of noise increase.

Referring to fig. 2 to 5, in an embodiment of the utility model, the cold-side heat exchanger 32 includes a plurality of heat exchange fins 321 extending along a first direction (X direction in fig. 1) and spaced apart from each other, and a heat exchange gap is formed between any two adjacent heat exchange fins 321 and is disposed towards the air inlet 201. In this way, the heat exchange gaps can guide gas to smoothly pass through the cold-face heat exchanger 32, so that the wind resistance of the cold-face heat exchanger 32 is reduced, hot air can enter the air inlet 201 through the plurality of heat exchange gaps, and the cooling efficiency of the cold-face heat exchanger 32 is improved; in addition, the plurality of heat exchanging fins 321 can increase the surface area of the cold-surface heat exchanger 32, thereby increasing the contact area between the hot air and the cold-surface heat exchanger 32 and improving the heat exchanging efficiency.

Specifically, the cold-side heat exchanger 32 further includes a heat exchange substrate 322, where the heat exchange substrate 322 is attached to the refrigeration side 311, and each heat exchange plate 321 is flat and perpendicular to the heat exchange substrate 322. In the present embodiment, the first direction X is perpendicular to the air inlet 201. It should be understood that, in other embodiments of the present utility model, the first direction X may also be disposed obliquely to the air inlet 201, which is not limited herein.

It will be appreciated that in other embodiments of the present utility model, the cold side heat exchanger 32 may have other configurations, for example, in another embodiment of the present utility model, the cold side heat exchanger 32 may include a plurality of heat exchange fins 321 extending along the first direction X, each heat exchange fin 321 having a wave shape; alternatively, in still another embodiment of the present utility model, the cold-surface heat exchanger 32 may include a plurality of partitions extending along the first direction X and disposed at intervals, and fins disposed between any two adjacent partitions, where a heat exchange gap is formed between the fins and the partitions, and a higher heat exchange efficiency may be achieved, which is not limited herein.

Referring to fig. 1, 2 and 4, in an embodiment of the utility model, the refrigeration mechanism 30 further includes a hot-side heat sink 33 and a hot-side heat dissipation fan 34 connected to each other, the hot-side heat sink 33 is attached to the heat generating surface 312, and the hot-side heat dissipation fan 34 is disposed on a peripheral side of the hot-side heat sink 33. In this way, the heat on the heating surface 312 is timely transferred by the heat-surface radiator 33 through heat conduction, and the heat on the surface of the heat-surface radiator 33 is taken away by the airflow generated by the heat-surface radiator fan 34 and by heat convection, so that the heat dissipation efficiency of the projector 100 is accelerated.

Specifically, the hot-side heat sink 33 includes a heat dissipation substrate and a plurality of array sheets vertically disposed on the heat dissipation substrate, so that the hot-side heat sink 33 has a large surface area, and the heat dissipation effect can be enhanced. It is understood that in other embodiments, the hot-side radiator 33 may be a radiating pipe, but is not limited thereto.

Referring to fig. 1 and 2, in an embodiment of the utility model, the projector 100 further includes a housing 40, a first opening 41 and a second opening 42 are formed in the housing 40, the fan mechanism 20 and the cold-side heat exchanger 32 are both accommodated in the housing 40, the semiconductor refrigerator 31 is disposed on the housing 40 and located at the first opening 41, the hot-side heat radiator 33, the hot-side heat radiation fan 34 and the optical element 10 are all located outside the housing 40, the hot-side heat radiator 33 is disposed opposite to the first opening 41, and the optical element 10 is disposed at the second opening 42.

In one aspect, the housing 40 may provide an inner cavity for housing the blower mechanism 20 and the cold side heat exchanger 32, and the temperature in the inner cavity may be reduced by the cooling effect of the cold side heat exchanger 32, thereby reducing the temperature of the gas flowing to the optical element 10, and reducing the influence of the ambient temperature on the temperature of the inner cavity; on the other hand, the hot-side radiator 33 and the hot-side radiator fan 34 are both located outside the housing 40, so that after the semiconductor refrigerator 31 is powered on, the heat generated by the heating surface 312 is timely transferred to the external environment, so as to avoid the influence on the temperature in the inner cavity as much as possible, and ensure the effective reduction of the air temperature in the air duct 22.

The air outlet 202 of the fan mechanism 20 is opposite to the second opening 42, so that the low-temperature air in the air duct 22 cools the optical element 10.

In one embodiment of the present utility model, the cold side heat exchanger 32 of the refrigeration mechanism 30 will be below the intake air temperature of 25 ℃ (defining the ambient temperature as 25 ℃, the intake air temperature being the ambient temperature), and the intake air temperature is reduced by exchanging heat with the intake air through the cold side heat exchanger 32. This temperature drop to the intake air by the cooling mechanism 30 allows the cooled optical element 10 to reach a lower operating temperature. In this way, the excessive temperature of the optical element 10 caused by the high altitude and high temperature environment can be compensated by the air temperature drop of the cold surface heat exchanger 32, so as to expand the use scene of the projector 100.

In the present embodiment, the result of numerical simulation is used to explain the operation effect of the cooling mechanism 30. At the same ambient temperature, the temperature of the air outlet 202 may be reduced by about 4 ℃ after the semiconductor refrigerator 31 is turned on. If the working power of the semiconductor refrigerator 31 with 15W is used in the working condition, and if the working power of the semiconductor refrigerator 31 is higher, the hot-surface radiator 33 is correspondingly increased, the cooling surface 311 of the cooling mechanism 30 can reach a lower temperature, and the lower temperature means a stronger cooling effect. At the same time, the cold face temperature may be equal to or lower than the dew point temperature. That is, after the power is large enough, the cold-face heat exchanger 32 of the refrigeration mechanism 30 will generate condensed water, and the condensed water enters the machine to affect the reliability of the whole machine, which will restrict the practical application of the refrigeration mechanism 30.

Because the refrigerating mechanism 30 generates condensed water under the heavy load condition (when the current of the refrigerating mechanism 30 increases, the temperature of the refrigerating surface 311 is lower) and the high humidity environment, the temperature of the refrigerating surface 311 is lower than the dew point temperature. Condensed water, if entering the air tunnel 22, may cause failure of the optical element 10. In order to effectively solve the problem of condensate water treatment, referring to fig. 1 and 2, in an embodiment of the utility model, the projector 100 further includes a light source radiator 50 and a drainage member 70, the light source radiator 50 is spaced apart from the cold-face heat exchanger 32, the drainage member 70 includes a first end 701 and a second end 702 opposite to each other, the first end 701 is disposed on a side of the cold-face heat exchanger 32 facing the air inlet 201, the second end 702 is disposed on the light source radiator 50, and the drainage member 70 is used for guiding condensate water on the cold-face heat exchanger 32 to the light source radiator 50.

The drainage member 70 transfers the condensed water to the second end 702 after absorbing water by capillary and siphon principle, so that the condensed water can be transferred to the light source radiator 50. It can be understood that, on the one hand, when the temperature of the light source radiator 50 is high, the condensed water absorbs heat and can be evaporated to achieve the removal effect; on the other hand, the temperature of the light source can be synchronously reduced by the evaporative cooling effect of the condensed water on the surface of the light source radiator 50, so that double benefits are realized.

Specifically, the light source heat sink 50 includes a plurality of parallel heat sinks 51 spaced apart from each other, and the second ends 702 are located on the surface of the heat sinks 51.

It will be appreciated that the number of flow directors 70 may be plural to achieve complete transfer of condensate water. Wherein the second end 702 of the flow guide 70 may be located on a surface of any one of the heat sinks 51. In some embodiments, the second ends 702 of different flow directors 70 may be located on the same surface of the heat sink 51, or the second ends 702 of different flow directors 70 may be located on the surface of different heat sinks 51, but are not limited thereto.

It will be appreciated that the cold-side heat exchanger 32, the hot-side heat sink 33, and the light source heat sink 50 are made of materials having good heat conductivity such as aluminum, copper, etc., to improve heat transfer efficiency.

In the present embodiment, the projector 100 further includes a light source heat radiation fan 60 provided on the peripheral side of the light source heat radiator 50, and air flow is generated by the light source heat radiation fan 60 and evaporation of condensed water is accelerated. In addition, the condensed water performs a liquid-to-gas phase change on the heat sink 51, and a great latent heat thereof can additionally take away more heat, thereby improving the performance of the light source heat sink 50.

Referring to fig. 2, 4 and 5, in one embodiment of the present utility model, a projection length of an end of the heat exchanging fin 321 facing the semiconductor refrigerator 31 in the first direction X is greater than a projection length of an end of the heat exchanging fin 321 facing away from the semiconductor refrigerator 31 in the first direction X; each heat exchange plate 321 is provided with a mounting hole 323, and the drainage piece 70 sequentially penetrates through the plurality of mounting holes 323.

In this way, the cold-face heat exchanger 32 is inclined towards the outlet side of the fan mechanism 20 and in the vertical direction, so that under the action of gravity, condensed water which is not transferred in time can be gathered to the bottom along the outlet side, thereby facilitating the gathering of condensed water and the installation of the drainage member 70, and avoiding the condensed water from entering the fan mechanism 20 as much as possible.

Because the heat exchanging gaps of the cold-face heat exchanger 32 are smaller, the wind pressure between the heat exchanging gaps is larger, and the wind moves along the direction of the air flow to the flow guiding member 70 until the wind is absorbed by the flow guiding member 70 before the condensed water does not form large water drops. If the air humidity is high, the condensed water is gathered into a stream, and the stream is directly absorbed by the drainage member 70 in a siphon manner, so as to ensure that the air flow channel inside the cold-surface heat exchanger 32 is smooth. The condensed water on the cold face heat exchanger 32 is continuously transferred to the drain 70.

Specifically, through holes are formed on the heat exchange plates 321, and the through holes on the heat exchange plates 321 are arranged at intervals along the second direction (Y direction in fig. 2) and form mounting channels. Wherein the mounting channel extends along a second direction Y perpendicular to the first direction X, and the mounting channel is a channel for penetrating the drainage member 70. It will be appreciated that, to enhance the transfer efficiency of the condensed water, each heat exchange plate 321 may be provided with a plurality of mounting holes 323, and correspondingly, the cold side heat exchanger 32 may be provided with a plurality of parallel mounting channels, and each mounting channel may be provided with a single or a plurality of drainage members 70 therein, which is not limited herein.

Referring to fig. 2 and 4, in one embodiment of the present utility model, the second end 702 is flat. In this way, when the contact area between the second end 702 and the surface of the light source heat sink 50 is increased, the evaporation of the condensed water drained from the second end 702 to the surface of the light source heat sink 50 can be accelerated when the temperature of the light source heat sink 50 is kept at a certain value.

Referring to fig. 1 and 2, in an embodiment of the utility model, the projector 100 further includes a functional layer 80 disposed on the light source heat sink 50, the second end 702 layer is attached to the functional layer 80, and the functional layer 80 is used for absorbing condensed water. In this way, the functional layer 80 can absorb the condensed water drained to the second end 702, so that the drainage member 70 can timely guide the condensed water on the cold-face heat exchanger 32 to the light source radiator 50, and avoid the condensed water on the cold-face heat exchanger 32 from gathering.

It will be appreciated that the functional layer 80 should have good water vapor permeability and liquid water wettability. Wherein the functional layer 80 includes at least one of a hydrogel film and a sponge.

In this embodiment, the drainage member 70 is a PVA (polyvinyl alcohol ) cotton swab; the functional layer 80 comprises a hydrogel film. The hydrogel film may be tiled on the surface of the heat sink 51 of the light source heat sink 50, and the flat end of the PVA cotton stick is attached to the hydrogel film due to the high water vapor permeability and liquid water wettability of the hydrogel film, so that the hydrogel film may be soaked with water in the PVA cotton stick, the heat sink 51 is equivalent to a surface covered with a thin water layer, and meanwhile, due to the high water vapor permeability of the hydrogel film, when the temperature of the light source heat sink 50 is raised and air flows, the liquid water in the hydrogel can be converted into gaseous water vapor for release. At this time, if the light source cooling fan 60 is operated, the air on the cooling fin 51 is driven to flow, and then the water on the hydrogel film is evaporated. The condensed water completes the liquid-to-gas phase change on the heat sink 51, and the huge latent heat thereof can additionally take away more heat, so that the performance of the light source radiator 50 is improved.

It will be appreciated that in another embodiment of the present utility model, the functional layer 80 may also comprise a sponge, which also has a strong water absorbing capacity due to its high porosity, thereby ensuring proper use of the drainage member 70, without limitation. In yet another embodiment of the present utility model, the functional layer 80 includes a hydrogel film and a sponge, without limitation.

Referring to fig. 1 and 2, in an embodiment of the utility model, the projector 100 further includes an insulating sleeve 90, and the insulating sleeve 90 is sleeved on the drainage member 70 and exposes the first end 701 and the second end 702. In this way, the drainage member 70 can isolate the drainage member 70 from other components in the process of transferring the condensed water, so that the drainage member 70 is prevented from soaking the other components halfway, insulation is maintained, and the safety of the projector 100 in the use process is improved.

Among them, the insulation sleeve 90 may be a PET (polyethylene terephthalate, polyethylene Glycol Terephthalate) sleeve, a PVDF (polyvinylidene fluoride, polyvinylidene Difluoride) sleeve, or the like, but is not limited thereto.

The projector 100 can reduce the air temperature, that is, the air temperature entering the air inlet 201 is reduced, so as to reduce the influence of the ambient temperature on the projector 100, and the rotating speed of the fan mechanism 20 is not required to be increased to reduce the temperature, thereby reducing the noise and solving the problem of high working noise of the projector in the prior art.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and are intended to be included in the scope of the present utility model.

Claims (10)

1. A projector comprising an optical element, the projector further comprising:

the fan mechanism comprises an air inlet and an air outlet, and the air outlet is opposite to the optical element;

the refrigeration mechanism comprises a semiconductor refrigerator and a cold surface heat exchanger, wherein the semiconductor refrigerator comprises a refrigeration surface and a heating surface which are oppositely arranged, the cold surface heat exchanger is attached to the refrigeration surface, and the cold surface heat exchanger is arranged at the air inlet.

2. The projector of claim 1, wherein the cold face heat exchanger comprises a plurality of heat exchange fins extending in a first direction and arranged at intervals, and a heat exchange gap is formed between any two adjacent heat exchange fins, and the heat exchange gap is arranged towards the air inlet.

3. The projector according to claim 1 or 2, wherein the refrigeration mechanism further comprises a hot-side radiator and a hot-side radiator fan which are connected, the hot-side radiator is attached to the heating side, and the hot-side radiator fan is arranged on the periphery of the hot-side radiator.

4. The projector of claim 3 further comprising a housing having a first opening and a second opening, wherein the blower mechanism and the cold side heat exchanger are both housed in the housing, the semiconductor refrigerator is disposed on the housing and located at the first opening, the hot side heat sink fan and the optical element are all located outside the housing, the hot side heat sink is disposed opposite to the first opening, and the optical element is disposed at the second opening.

5. The projector of claim 2 further comprising a light source heat sink and a drainage member, the light source heat sink being spaced from the cold-face heat exchanger, the drainage member comprising opposed first and second ends, the first end being disposed on a side of the cold-face heat exchanger facing the air intake, the second end being disposed on the light source heat sink, the drainage member being configured to direct condensate on the cold-face heat exchanger onto the light source heat sink.

6. The projector according to claim 5, wherein a projected length of an end of the heat exchanging fin toward the semiconductor refrigerator in the first direction is longer than a projected length of an end of the heat exchanging fin away from the semiconductor refrigerator in the first direction; and each heat exchange plate is provided with a mounting hole, and the drainage piece sequentially penetrates through a plurality of mounting holes.

7. The projector of claim 5 wherein the second end is flat.

8. The projector of claim 5 further comprising a functional layer disposed on the light source heat sink, the second end being attached to the functional layer, the functional layer configured to adsorb condensed water.

9. The projector of claim 8, wherein the drainage member is a PVA cotton stick; the functional layer includes at least one of a hydrogel film and a sponge.

10. The projector of any of claims 5-9, further comprising an insulating sleeve that fits over the drain and exposes the first and second ends.