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These motors are sometimes called DC motors, sometimes EC motors and occasionally DC/EC motors. DC stands for direct current and EC stands for electronically commutated.. DC motors allow the speed of the fans within a fan coil unit to be controlled by means of a 0-10 Volt input control signal to the motor/s, the transformers and speed switches associated with AC fan coils are not required.
The first mini-split system was sold in 1961 by Toshiba in Japan, and the first wall-mounted mini-split air conditioner was sold in 1968 in Japan by Mitsubishi Electric, where small home sizes motivated their development. The Mitsubishi model was the first air conditioner with a cross-flow fan.
A representative pressure–volume diagram for a refrigeration cycle. Vapour-compression refrigeration or vapor-compression refrigeration system (VCRS), [1] in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for air conditioning of buildings and automobiles.
Goodman Manufacturing was founded by HVAC dealer, Harold V. Goodman, in 1975 as a manufacturer of flexible air ducts and plastic blade registers. However, he turned his sights to fulfill a dream of manufacturing affordable HVAC equipment for households across the United States of America and beyond. [citation needed]
The FM-7 ("Fujitsu Micro 7") is a home computer created by Fujitsu. [2] [3] It was first released in 1982 and was sold in Japan and Spain. [4]It is a stripped-down version of Fujitsu's earlier FM-8 computer, [2] and during development it was referred to as the "FM-8 Jr.".
An agreement between Ingersoll Rand and Mitsubishi Electric regarding establishment of the joint venture was reached in January 2018 [1] and the company started operation in mid-2018.
Within three years after spending heavily in R&D, he and his team of 500 employees shipped Fujitsu's first numerical-control machine to Makino Milling Machine Co. [9] In 1972, the Computing Control Division became independent and FANUC Ltd. was established. [10]
Between early 2003 and 2006, the price of Apple's stock increased more than tenfold, from around $6 per share (split-adjusted) to over $80. [101] When Apple surpassed Dell's market cap in January 2006, [ 102 ] Jobs sent an email to Apple employees saying Dell's CEO Michael Dell should eat his words. [ 103 ]