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  2. GE Appliances - Wikipedia

    en.wikipedia.org/wiki/GE_Appliances

    On June 6, 2016, Qingdao Haier (now Haier Smart Home Company) acquired GE Appliances for $5.6 billion. Under the terms of the sale, Haier has the right to use the GE brand name until 2056. GE Appliances launched a refreshed tagline ("good things, for life") in 2017, [ 14 ] [ 15 ] [ 16 ] a nod to its history with General Electric, which used the ...

  3. Haier - Wikipedia

    en.wikipedia.org/wiki/Haier

    Haier was founded as Qingdao Refrigerator Co. in 1984. With China opening up to world markets, foreign corporations began searching for partnerships in China. One of these, Germany's refrigerator company Liebherr, entered into a joint-venture contract with Qingdao Refrigerator Co., offering technology and equipment to its Chinese counterpart.

  4. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    An air conditioning system, or a standalone air conditioner, provides cooling and/or humidity control for all or part of a building. Air conditioned buildings often have sealed windows, because open windows would work against the system intended to maintain constant indoor air conditions.

  5. Air conditioning - Wikipedia

    en.wikipedia.org/wiki/Air_conditioning

    The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the Air Conditioning, Heating and Refrigeration Institute in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. [61]

  6. Proportional–integral–derivative controller - Wikipedia

    en.wikipedia.org/wiki/Proportional–integral...

    Tuning a control loop is the adjustment of its control parameters (proportional band/gain, integral gain/reset, derivative gain/rate) to the optimum values for the desired control response. Stability (no unbounded oscillation) is a basic requirement, but beyond that, different systems have different behavior, different applications have ...

  7. Zhang Ruimin - Wikipedia

    en.wikipedia.org/wiki/Zhang_Ruimin

    Zhang Ruimin was born on January 5, 1949, to a working class family in Qingdao, Shandong; his parents were employed in a local garment factory. [5] As a youth, Zhang joined the Red Guards, visited Mao's birthplace, and attended rallies in Beijing since all schools had been closed, and when the movement was finally disbanded, he was able to avoid being sent down to the countryside.

  8. Power inverter - Wikipedia

    en.wikipedia.org/wiki/Power_inverter

    Control and feedback circuitry is used to adjust the final output of the inverter section which will ultimately determine the speed of the motor operating under its mechanical load. Motor speed control needs are numerous and include things like: industrial motor driven equipment, electric vehicles, rail transport systems, and power tools.

  9. Elevator - Wikipedia

    en.wikipedia.org/wiki/Elevator

    The primary reason for installing an elevator air conditioner is the comfort that it provides while traveling in the elevator. It stabilizes the condition of the air inside the elevator car. Some elevator air conditioners can be used in countries with cold climates if a thermostat is used to reverse the refrigeration cycle to warm the elevator car.