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Environment

Automotive air Conditioner Division

In the Automotive air Conditioner Division, we have established five environmental principles to guide product development, with the aim of reducing environmental impact.

  1. Develop products that save energy by enhancing energy efficiency, reducing product weight, and making use of variable capacity compressors.
  2. Develop products that are manufactured in an energy-efficient manner by reducing the number of product parts and improving workability and ease of assembly.
  3. Develop products that can be easily recycled by promoting standardization and extending product life.
  4. Develop environment-friendly products through such measures as reducing CFC leakage and creating products that use new refrigerants.
  5. Limit or eliminate the use of substances that are restricted by environmental laws and regulations or have raised concerns among customers.

These principles are used to assess products in line with our goal of developing environment-friendly Automotive air conditioners.



Variable Capacity Compressor Air Conditioner System

Energy conservation is one of the most important and pressing environmental tasks. Sanden has developed a Automotive air conditioner system that uses a variable capacity compressor to reduce fuel consumption during air conditioner use.
Conventional Automotive air conditioner systems use an excessive amount of power during vehicle acceleration and high-speed driving as a result of the method used to maintain a constant evaporator outlet air temperature. An air conditioning system equipped with a variable capacity compressor eliminates excessive compressor power consumption by tracking operating conditions and temperatures outside and inside the vehicle to enable more fine-tuned control of compressor torque, which, in turn, reduces fuel consumption during air conditioner use. Going forward, Sanden will continue to endeavor to develop environment-friendly Automotive air conditioner systems.

Air Conditioner System for Hybrid Cars

The development of energy-efficient vehicles is key to reducing environmental impact. Sanden has developed an air conditioner system for hybrid cars.
The core of this system is a proprietary hybrid compressor comprising two scroll compressors—a belt-driven unit powered by the engine and a motor-driven unit powered by an internal motor. This compressor can switch between “belt only,” “motor only,” and “belt and motor” operation in accordance with outside temperatures, vehicle speed, and other conditions, reducing power use through extremely efficient compressor control.
By optimizing compressor control, we have developed a Automotive air conditioner system that is 50% more energy efficient than our conventional products while maintaining performance in terms of temperature control and defogging capabilities.

Hexavalent Chromium-Free Evaporator for HVAC Systems

The aluminum evaporator in HVAC units uses energy from the evaporation of coolant that flows through the evaporator to cool outside air. Since condensation forms on the surface of the evaporator during this process, it is important that the evaporator’s surface is resistant to corrosion and rust. These qualities were previously imparted using hexavalent chromium, a substance that has a detrimental impact on the environment; however, we now use a chromium-free surface coating that contains two inhibitor compounds. One inhibitor serves as a barrier against corrosive environments and the other enables self-repair to offer a level of protection against corrosion and rust similar to hexavalent chromium.