Sanyo Electric Co., Ltd.

Yoshiaki Kurosawa

Mitsuhiko Ishino

Toshiyuki Ebara

Masahisa Otake

Hiroshi Sekiya

Eiji Fukuda

Toshikazu Ishihara

Hiroyuki Itsuki

Junji Matsue

Yoshihiko Kobayashi

Aritomo Yoshida

Ryouichi Katohno

Izumi Okamoto

Shigetoshi Doi

The present invention provides a projector apparatus capable of ensuring stable operation, which is configured to efficiently cool an optical device by circulating air cooled by a cooling part of a refrigeration unit, and further to prevent moisture resulting from evaporation of dew adhered to the cooling part from adversely affecting the optical device when stopping the operation of the refrigeration unit. The optical chamber and the cooling chamber are enclosed respectively by adiabatic walls, the cooling chamber and the optical chamber are connected to each other through a cold air inlet port and a cold air outlet port, and the cold air inlet port and the cold air outlet port are provided with opening and closing mechanisms. In a cooling operation mode, the optical device is cooled with cold air by opening the opening and closing mechanisms, and upon stoppage of the cooling operation, the opening and closing mechanisms are closed to prevent the inflow of the moisture in the cooling chamber to the optical chamber.

Projector apparatus

A refrigerant cycle unit having a side heat exchanger for dehumidifying a space, and a heating mode for delivering a refrigerant from a compressor into an internal gas cooler. The refrigerant cycle unit further includes a cooling mode delivering the refrigerant from the compressor into the external heat exchanger, and after being decompressed by the compressor flowing the refrigerant into an evaporator and into the internal gas cooler. The refrigerant flows into the evaporator, and the decompressed refrigerant flows into the external heat exchanger and the two refrigerants are discharged from the evaporator and the external heat exchanger, respectively, and are united together and returned to the compressor.

Refrigerant cycle unit

An object of the present invention is to improve a heat exchanging capability in an evaporator in a refrigerant cycle system in which a high pressure side is operated at a supercritical pressure. The refrigerant cycle system is a refrigerant cycle system in which a compressor, a gas cooler, an expansion valve and an evaporator are sequentially connected in a cyclic form and a high pressure side is operated at a supercritical pressure, wherein the degree of opening of the expansion valve is adjusted based on the temperature and pressure of a refrigerant at an outlet of the evaporator so as to control the degree of superheat at the outlet of the evaporator. An abstract of the present invention is to make large the degree of superheat at the outlet of the evaporator by means of the expansion valve.

Supercritical refrigerant cycle system

Gas displacement volumes of a high temperature chamber and a middle temperature chamber in a high temperature portion of a hot gas machine are different. Alternatively, a gas displacement volume of a low temperature chamber and a middle temperature chamber in a low temperature portion are different.

Hot gas machine

Growing community of inventors

Saitama, Japan

Yoshiaki Kurosawa