Abstract: A projection device including a casing, a light source module, an optical engine module and a projection lens is provided. A front cover, a rear cover, a first side cover, a second side cover, an upper cover and a lower cover of the casing surround an accommodating space. The light source module includes a first and a second light sources, and a first and a second light source heat dissipation modules. The lower cover has a first, a second and a third air inlets. The first and the second side covers respectively have a first and a second air outlets. The first and the second light source heat dissipation modules are correspondingly disposed above the first air inlet and correspond to the first air outlet. The second and the third air inlets are respectively disposed below two sides of the projection lens and adjacent to the front cover.

Abstract: A projection device includes at least one heat source and a heat dissipation module. The heat dissipation module is connected to the heat source and is configured to dissipate heat energy generated by the heat source. The heat dissipation module includes a tank, at least one radiator, at least one cold plate, a cooling fluid, and a connection pipe. The connection pipe connects the tank, the radiator, and the cold plate, so that the cooling fluid flows in the heat dissipation module. The tank includes a pressure sensing device configured to measure a liquid level of the cooling fluid in the tank. Also, a tank is provided. The projection device provided in the disclosure can learn the liquid level of the tank in real-time, and the design cost is low.

Abstract: The invention provides a heat dissipating module configured to dissipate heat of at least one heating element of a projection device. The heat dissipating module includes a first radiator, a second radiator, a pipe, and at least one fan. The second radiator is disposed opposite to the first radiator. The heating element, the first radiator, and the second radiator are connected to each other through the pipe to form a loop. A working fluid is configured to be filled in the pipe, and the working fluid flows through the first radiator after flowing through the second radiator for heat exchange, and the working fluid flowing into the first radiator flows to the heating element for cyclic heat dissipation after heat exchange again through the first radiator. The fan is configured between the first radiator and the second radiator.

Abstract: The invention provides a heat dissipation system and a projection device including the same. The heat dissipation system includes a case, a plurality of liquid cold plates, a first radiator and a second radiator. The case includes a main air inlet and an air outlet. The liquid cold plates are disposed in the case. The first radiator is disposed in the case and beside the main air inlet. The second radiator is disposed in the case and beside the air outlet. The liquid cold plates, the first radiator and the second radiator are connected with one another. The invention has a good heat radiating effect.

Abstract: A projection device includes at least one heat source and a heat dissipation module. The heat dissipation module is connected to the heat source and is configured to dissipate heat energy generated by the heat source. The heat dissipation module includes a tank, at least one radiator, at least one cold plate, a cooling fluid, and a connection pipe. The connection pipe connects the tank, the radiator, and the cold plate, so that the cooling fluid flows in the heat dissipation module. The tank includes a pressure sensing device configured to measure a liquid level of the cooling fluid in the tank. Also, a tank is provided. The projection device provided in the disclosure can learn the liquid level of the tank in real-time, and the design cost is low.

Abstract: A heat dissipation structure including at least one heat dissipation fin set and at least one heat pipe is provided. The heat dissipation fin set includes at least two heat dissipation fins, each having a side edge and a positioning groove located at the side edge. The side edge of one heat dissipation fin is joined to the side edge of another heat dissipation fin. The positioning groove of one heat dissipation fin is aligned with the positioning groove of another heat dissipation fin to form a positioning perforation. The heat pipe is clamped between the heat dissipation fins and passes through the positioning perforation along an extension axis. On a cross section perpendicular to the extension axis, a cross-sectional width and a cross-sectional thickness of the heat pipe are respectively D1 and D2, where D1 is greater than or equal to D2. A projection device is also provided.

Abstract: The invention provides a heat dissipating module configured to dissipate heat of at least one heating element of a projection device. The heat dissipating module includes a first radiator, a second radiator, a pipe, and at least one fan. The second radiator is disposed opposite to the first radiator. The heating element, the first radiator, and the second radiator are connected to each other through the pipe to form a loop. A working fluid is configured to be filled in the pipe, and the working fluid flows through the first radiator after flowing through the second radiator for heat exchange, and the working fluid flowing into the first radiator flows to the heating element for cyclic heat dissipation after heat exchange again through the first radiator. The fan is configured between the first radiator and the second radiator.

Abstract: A projection apparatus and a heat dissipation control method thereof are provided. The projection apparatus includes a light valve module, a light source, a brightness sensor, a cooling element, a first temperature sensor, a second temperature sensor and a controller. The controller determines a specified temperature of the cooling element according to the brightness of an illumination beam provided by the light source, and calculates a dew point temperature according to the ambient temperature. The controller adjusts the operating power of the cooling element according to the dew point temperature, the specified temperature and the cold end temperature of the cold end surface of the cooling element. The operating power of the cooling element is flexibly adjusted based on the brightness provided by the light source to avoid a dew formation phenomenon on the cooling element and the light valve module.

Abstract: A projection apparatus and a heat dissipation control method thereof are provided. The projection apparatus includes a light valve module, a light source, a brightness sensor, a cooling element, a first temperature sensor, a second temperature sensor and a controller. The controller determines a specified temperature of the cooling element according to the brightness of an illumination beam provided by the light source, and calculates a dew point temperature according to the ambient temperature. The controller adjusts the operating power of the cooling element according to the dew point temperature, the specified temperature and the cold end temperature of the cold end surface of the cooling element. The operating power of the cooling element is flexibly adjusted based on the brightness provided by the light source to avoid a dew formation phenomenon on the cooling element and the light valve module.

Abstract: A projector includes a light source, an optical engine module, and a projection lens. The light source is configured for providing an illumination beam. The optical engine module includes a light valve, a casing, and a heat conducting structure. The light valve is configured to convert the illumination beam into an image beam. The light valve has a front portion and a rear portion opposite to each other. The casing is connected to the front portion. The heat conducting structure is disposed on the casing and at at least one side of the front portion. The projection lens is disposed on the casing and configured to project an image. The heat conducting structure is configured to dissipate heat of the casing and the front portion of the light valve.

Abstract: A light source module adapted to a projector includes a light source, a light combining system, a first cooling fan, a second cooling fan, a first guide duct and a second guide duct. The light source includes a first light emitting device and a second light emitting device. The light combining system is disposed between the first light emitting device and the second light emitting device. The first cooling fan is disposed on the first light emitting device. The second cooling fan is disposed on the second light emitting device. The first guide duct is connected to the first cooling fan and guides a cooling airflow provided by the first cooling fan to the second light emitting device. The second guide duct is connected to the second cooling fan and guides a cooling airflow provided by the second cooling fan to the first light emitting device.

Abstract: A projector includes a light source, an optical engine module, and a projection lens. The light source is configured for providing an illumination beam. The optical engine module includes a light valve, a casing, and a heat conducting structure. The light valve is configured to convert the illumination beam into an image beam. The light valve has a front portion and a rear portion opposite to each other. The casing is connected to the front portion. The heat conducting structure is disposed on the casing and at at least one side of the front portion. The projection lens is disposed on the casing and configured to project an image. The heat conducting structure is configured to dissipate heat of the casing and the front portion of the light valve.

Abstract: A light source module adapted to a projector includes a light source, a light combining system, a first cooling fan, a second cooling fan, a first guide duct and a second guide duct. The light source includes a first light emitting device and a second light emitting device. The light combining system is disposed between the first light emitting device and the second light emitting device. The first cooling fan is disposed on the first light emitting device. The second cooling fan is disposed on the second light emitting device. The first guide duct is connected to the first cooling fan and guides a cooling airflow provided by the first cooling fan to the second light emitting device. The second guide duct is connected to the second cooling fan and guides a cooling airflow provided by the second cooling fan to the first light emitting device.

Abstract: A lamp includes a lampwick, a reflector, and a shade. The reflector has an opening and a bottom portion opposite to the opening. The lampwick is disposed at the bottom portion and passes through the bottom portion and at least one part of the lampwick is disposed in the reflector. The shade disposed outside the reflector covers a part of the reflector. The shade connected to the bottom portion has an inlet and an outlet. The inlet and the outlet are disposed at two opposite sides of the reflector respectively. An air flow flows into the space between the reflector and the shade through the inlet. At least one part of the air flow flows through the outlet along a flowing direction. An included angle defined between the flowing direction and a transmitting direction of an illumination light beam formed by the reflector is an acute angle.

Abstract: An illuminance device including a gas discharge lamp, an airflow generator, and a distributing duct is provided. The lamp has a reflector, a base connected to the reflector, a burner installed in the reflector, and the base, a first opening located at the reflector and a front part of the lamp, and a second opening located at a rear part of the lamp and exposing the burner. The distributing duct has an inlet, a first outlet, and a second outlet, and an opening area of the first outlet is larger than that of the second outlet. A cooling airflow provided by the airflow generator enters the distributing duct via the inlet, the distributing duct guides a part of the cooling airflow to the first opening via the first outlet, and the distributing duct guides another part of the cooling airflow to the second opening via the second outlet.

Abstract: An illuminance device including a gas discharge lamp, an airflow generator, and a distributing duct is provided. The lamp has a reflector, a base connected to the reflector, a burner installed in the reflector, and the base, a first opening located at the reflector and a front part of the lamp, and a second opening located at a rear part of the lamp and exposing the burner. The distributing duct has an inlet, a first outlet, and a second outlet, and an opening area of the first outlet is larger than that of the second outlet. A cooling airflow provided by the airflow generator enters the distributing duct via the inlet, the distributing duct guides a part of the cooling airflow to the first opening via the first outlet, and the distributing duct guides another part of the cooling airflow to the second opening via the second outlet.

Abstract: A lamp includes a lampwick, a reflector, and a shade. The reflector has an opening and a bottom portion opposite to the opening. The lampwick is disposed at the bottom portion and passes through the bottom portion and at least one part of the lampwick is disposed in the reflector. The shade disposed outside the reflector covers a part of the reflector. The shade connected to the bottom portion has an inlet and an outlet. The inlet and the outlet are disposed at two opposite sides of the reflector respectively. An air flow flows into the space between the reflector and the shade through the inlet. At least one part of the air flow flows through the outlet along a flowing direction. An included angle defined between the flowing direction and a transmitting direction of an illumination light beam formed by the reflector is an acute angle.