Heat exchanger, light source device, projector and electronic apparatus

A light source device, comprising:

• a light source;
• and
• a heat exchanger attached to the light source, the heat exchanger including a housing having an inlet passage through which a fluid is introduced, an outlet passage from which the fluid is discharged, an inner communication space in which the fluid flows from the inlet passage and the outlet passage, and a plurality of unit plates of thin flat plates that are disposed in parallel to a flowing direction of the fluid, the plurality of unit plates layered in a direction to be substantially orthogonal to the flowing direction, the plurality of unit plates each having a fin in parallel to the flowing direction of the fluid, a frame enclosing the fin and projecting in an out-of-plane direction of the fin, and holes respectively communicating with the inlet passage and the outlet passage, wherein
• heat is exchanged between a heating body attached on an outer surface of the housing and the fluid.

A projector, comprising:

• a light source device, the light source device including a light source and a heat exchanger attached to the light source, the heat exchanger having a housing having an inlet passage through which a fluid is introduced, an outlet passage from which the fluid is discharged, an inner communication space in which the fluid flows from the inlet passage and the outlet passage, and a plurality of unit plates of thin flat plates that are disposed in parallel to a flowing direction of the fluid, the plurality of unit plates layered in a direction to be substantially orthogonal to the flowing direction, the plurality of unit plates each having a fin in parallel to the flowing direction of the fluid, a frame enclosing the fin and projecting in an out-of-plane direction of the fin, and holes respectively communicating with the inlet passage and the outlet passage;
• an optical modulator that modulates light irradiated from the light source device in accordance with image data;
• and
• a projecting device that projects the light modulated by the optical modulator, wherein
• heat is exchanged between a heating body attached on an outer surface of the housing and the fluid.