Projection image display device

摘要

A projection image display device includes an indoor unit to be located indoors and an outdoor unit to be located outdoors. The outdoor unit includes a second refrigerant piping that forms a loop refrigerant path in combination with a first refrigerant piping, a cooling device, and a cooling control circuit that controls cooling for R, G, B laser heat sinks by the cooling device. The indoor unit includes a main control circuit that communicates with the cooling control circuit to control the cooling by the cooling device.

主权项

1. A projection image display device that projects an image onto a screen, comprising:
an indoor unit to be located indoors and to project said image; and an outdoor unit to be located outdoors, wherein said indoor unit includes:
at least one semiconductor laser element group that is a light source for said image and includes a plurality of semiconductor laser elements;a heat sink that includes a metal block thermally connected to said plurality of semiconductor laser elements; anda first refrigerant piping thermally connected to said heat sink, said outdoor unit includes:
a second refrigerant piping that forms a loop refrigerant path in combination with said first refrigerant piping through a refrigerant piping located between said indoor unit and said outdoor unit;a cooling device that includes a refrigerant compressor, a condenser, and a fan and performs a cooling for said heat sink through a refrigerant circulating in said refrigerant path; anda cooling control circuit that controls said cooling by said cooling device, and said indoor unit further includes a main control circuit that communicates with said cooling control circuit through a communication path located between said indoor unit and said outdoor unit to control said cooling by said cooling device.