Embodiments of the disclosure provide a projector including a housing, a light source module, a light engine module, a projection lens module, and a thermal module. An airflow is formed in the housing. The thermal module is disposed in the housing and includes a base and a plurality of fins. The housing has a space for accommodating the thermal module, and a dimension of the space is L. An average velocity of the airflow before entering the plurality of fins is V, and a pitch between adjacent fins of the plurality of fins is P, and a reference value Y=[2.9*(V+1)*(P−2.3)∧2+2.4*(V−3.308)∧2+15.82], and when L is greater than or equal to Y, the thermal module is a three-dimensional vapor chamber thermal module or a tower thermal module.

Embodiments of the disclosure provide a projector including a housing, a light source module, a light engine module, a projection lens module, and a thermal module. An airflow is formed in the housing. The thermal module is disposed in the housing and includes a base and a plurality of fins. The housing has a space for accommodating the thermal module, and a dimension of the space is L. An average velocity of the airflow before entering the plurality of fins is V, and a pitch between adjacent fins of the plurality of fins is P, and a reference value Y=[2.9*(V+1)*(P−2.3)∧2+2.4*(V−3.308)∧2+15.82], and when L is greater than or equal to Y, the thermal module is a three-dimensional vapor chamber thermal module or a tower thermal module.

A heat dissipation structure capable of holding different components at different temperatures within one housing includes at least first and second elements, a refrigerator, and a heat dissipation device. The refrigerator is positioned adjacent to the first element. The refrigerator forms a first heat dissipation channel to dissipate heat from the first element requiring a first target temperature. The dissipation device forms a second heat dissipation channel to dissipate heat from the second element requiring a second target temperature, the first target temperature being higher than the second target temperature.

A heat dissipation structure capable of holding different components at different temperatures within one housing includes at least first and second elements, a refrigerator, and a heat dissipation device. The refrigerator is positioned adjacent to the first element. The refrigerator forms a first heat dissipation channel to dissipate heat from the first element requiring a first target temperature. The dissipation device forms a second heat dissipation channel to dissipate heat from the second element requiring a second target temperature, the first target temperature being higher than the second target temperature.

Embodiments of the disclosure provide a projector including a housing, a light source module, a light engine module, a projection lens module, and a thermal module. An airflow is formed in the housing. The thermal module is disposed in the housing and includes a base and a plurality of fins. The housing has a space for accommodating the thermal module, and a dimension of the space is L. An average velocity of the airflow before entering the plurality of fins is V, and a pitch between adjacent fins of the plurality of fins is P, and a reference value Y=[2.9*(V+1)*(P2.3){circumflex over ()}2+2.4*(V3.308){circumflex over ()}2+15.82], and when L is greater than or equal to Y, the thermal module is a three-dimensional vapor chamber thermal module or a tower thermal module.

Embodiments of the disclosure provide a projector including a housing, a light source module, a light engine module, a projection lens module, and a thermal module. An airflow is formed in the housing. The thermal module is disposed in the housing and includes a base and a plurality of fins. The housing has a space for accommodating the thermal module, and a dimension of the space is L. An average velocity of the airflow before entering the plurality of fins is V, and a pitch between adjacent fins of the plurality of fins is P, and a reference value Y=[2.9*(V+1)*(P2.3){circumflex over ()}2+2.4*(V3.308){circumflex over ()}2+15.82], and when L is greater than or equal to Y, the thermal module is a three-dimensional vapor chamber thermal module or a tower thermal module.

A heat transport device 1 includes a housing 2 with a hollow structure, working fluid 3 sealed in a sealed space of the housing 2, and a porous structure member 4 having a capillary structure disposed in the sealed space, and the housing 2 is configured to be rotatable around a rotation axis P by a motor as a drive source. The housing 2 includes an evaporation part S1 for vaporizing the working fluid 3 by heat from a heating element 5 and a condensation part S2 for condensing vapor to restore it to the working fluid 3, and the evaporation part S1 is provided on an outer side in the radial direction than the condensation part S2 with respect to the rotation axis P.

A heat transport device 1 includes a housing 2 with a hollow structure, working fluid 3 sealed in a sealed space of the housing 2, and a porous structure member 4 having a capillary structure disposed in the sealed space, and the housing 2 is configured to be rotatable around a rotation axis P by a motor as a drive source. The housing 2 includes an evaporation part S1 for vaporizing the working fluid 3 by heat from a heating element 5 and a condensation part S2 for condensing vapor to restore it to the working fluid 3, and the evaporation part S1 is provided on an outer side in the radial direction than the condensation part S2 with respect to the rotation axis P.

A projector includes a light source device and a cooling device. The light source device includes a first light source having a plurality of first light emitting elements, a second light source having a plurality of second light emitting elements, and a light combining member adapted to combine light. The cooling device includes a first cooling section adapted to cool the first light emitting elements with a liquid refrigerant so that a first temperature difference increases in a first direction, and a second cooling section adapted to cool the second light emitting elements with a liquid refrigerant so that a second temperature difference increases in a second direction. The first and second light sources are arranged so that an illuminance distribution caused by the first temperature difference and an illuminance distribution caused by the second temperature difference are canceled out in the light combining member.

A projector includes a light source device and a cooling device. The light source device includes a first light source having a plurality of first light emitting elements, a second light source having a plurality of second light emitting elements, and a light combining member adapted to combine light. The cooling device includes a first cooling section adapted to cool the first light emitting elements with a liquid refrigerant so that a first temperature difference increases in a first direction, and a second cooling section adapted to cool the second light emitting elements with a liquid refrigerant so that a second temperature difference increases in a second direction. The first and second light sources are arranged so that an illuminance distribution caused by the first temperature difference and an illuminance distribution caused by the second temperature difference are canceled out in the light combining member.