To the physical way, chemical way of heat conduction, heat absorption of the complex apparatus composed of devices are called refrigeration equipment; air conditioners, refrigerators, freezers, including air-cooled is also regarded as refrigeration equipment, as well as controllable liquid nitrogen storage equipment are refrigeration equipment.
Don't be limited to whether it is refrigerant, as long as it is in order to reduce the heat, heat transfer equipment can be broadly referred to as refrigeration equipment