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 DENSO is the world's leading producer of car air conditioning systems, with a world market share of 25 percent. Always looking for ways to improve efficiency, DENSO researches technology that will lead to products that not only meet customers' needs, but protect the environment at the same time. DENSO supplies electric air conditioning systems for hybrid cars,
a market that is expected to rapidly grow in the next several years.
For the new Toyota Prius, a hybrid car launched in September of
this year, DENSO is supplying a high-efficiency air conditioning
system equipped with a newly developed electric compressor. The newly developed electric compressor combines a scroll compressor, a DC brushless motor, and an inverter for activating and controlling the motor. Because of its optimized scroll form, the compressor improves efficiency in compressing refrigerant and reduces energy loss, leading to higher performance. DENSO also developed new structures and control methods for the motor and the inverter. As a result, the electric compressor is 40 percent smaller and 50 percent lighter than conventional electric compressors - a significant reduction in size and weight. This small compressor can be mounted on the engine while conventional larger compressors can be mounted only on the body. The new Prius has the compressor mounted on the engine. DENSO has developed and applied the world's first CO2 car air conditioning system using CO2 as refrigerant for Toyota's fuel cell hybrid vehicle launched last December. Through products like these, DENSO continues to lead the 21st century in the creation of comfortable vehicle environments.
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