Wavelength conversion device, illumination device, and projector

A wavelength conversion device comprising:

• a rotating device;
• a substrate including a first surface and a second surface disposed at an opposite side of the first surface, the substrate being rotated by the rotating device;
• a wavelength conversion element provided on the first surface and configured to convert a wavelength of incident light;
• and
• a first cooling device provided on the second surface, the first cooling device including, on an inside, a space in which working fluid is encapsulated, the first cooling device cooling the wavelength conversion element, wherein:
• the first cooling device is disposed in a position corresponding to the wavelength conversion element,
• the space extends from an outer edge side of the substrate to a rotation axis side,
• the first cooling device includes
• an evaporator provided in the space and configured to evaporate the working fluid in a liquid phase with heat transferred from the wavelength conversion element to change the working fluid in the liquid phase to the working fluid in a gas phase, and
• a condenser provided in the space and configured to condense the working fluid in the gas phase to change the working fluid in the gas phase to the working fluid in the liquid phase,
• the evaporator includes a liquid retaining part configured to retain the working fluid in the liquid phase,
• the liquid retaining part is provided at the outer edge side in the space and disposed in the position corresponding to the wavelength conversion element,
• a direction from the first surface toward the second surface along the rotation axis is a first direction, and
• the first cooling device includes, in a part located in the first direction, an inclined surface inclined such that length of the space along the first direction increases from the outer edge side toward the rotation axis side.

A wavelength conversion device comprising:

• a rotating device;
• a substrate including a first surface and a second surface disposed at an opposite side of the first surface, the substrate being rotated by the rotating device;
• a wavelength conversion element provided on the first surface and configured to convert a wavelength of incident light;
• and
• a first cooling device provided on the second surface, the first cooling device including, on an inside, a space in which working fluid is encapsulated, the first cooling device cooling the wavelength conversion element, wherein:
• the first cooling device is disposed in a position corresponding to the wavelength conversion element,
• the space extends from an outer edge side of the substrate to a rotation axis side,
• the first cooling device includes
• an evaporator provided in the space and configured to evaporate the working fluid in a liquid phase with heat transferred from the wavelength conversion element to change the working fluid in the liquid phase to the working fluid in a gas phase, and
• a condenser provided in the space and configured to condense the working fluid in the gas phase to change the working fluid in the gas phase to the working fluid in the liquid phase,
• the evaporator includes a liquid retaining part configured to retain the working fluid in the liquid phase,
• the liquid retaining part is provided at the outer edge side in the space and disposed in the position corresponding to the wavelength conversion element,
• a plurality of the first cooling devices are provided, and
• the plurality of first cooling devices respectively extend from the rotation axis side to the outer edge side.

A wavelength conversion device comprising:

• a rotating device;
• a substrate including a first surface and a second surface disposed at an opposite side of the first surface, the substrate being rotated by the rotating device;
• a wavelength conversion element provided on the first surface and configured to convert a wavelength of incident light;
• and
• a first cooling device provided on the second surface, the first cooling device including, on an inside, a space in which working fluid is encapsulated, the first cooling device cooling the wavelength conversion element, wherein:
• the first cooling device is disposed in a position corresponding to the wavelength conversion element,
• the space extends from an outer edge side of the substrate to a rotation axis side,
• the first cooling device includes
• an evaporator provided in the space and configured to evaporate the working fluid in a liquid phase with heat transferred from the wavelength conversion element to change the working fluid in the liquid phase to the working fluid in a gas phase, and
• a condenser provided in the space and configured to condense the working fluid in the gas phase to change the working fluid in the gas phase to the working fluid in the liquid phase,
• the evaporator includes a liquid retaining part configured to retain the working fluid in the liquid phase,
• the liquid retaining part is provided at the outer edge side in the space and disposed in the position corresponding to the wavelength conversion element,
• a second cooling device provided on the first surface, the second cooling device including, on an inside, a space in which the working fluid is encapsulated,
• the second cooling device includes
• an evaporator provided in the space and configured to evaporate the working fluid in the liquid phase with the heat transferred from the wavelength conversion element to change the working fluid in the liquid phase to the working fluid in the gas phase, and
• a condenser provided in the space and configured to condense the working fluid in the gas phase to change the working fluid in the gas phase to the working fluid in the liquid phase, and
• the second cooling device is disposed such that the evaporator of the second cooling device corresponds to a part at the rotation axis side of the first cooling device.