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3 results about "Unit operation" patented technology

In chemical engineering and related fields, a unit operation is a basic step in a process. Unit operations involve a physical change or chemical transformation such as separation, crystallization, evaporation, filtration, polymerization, isomerization, and other reactions. For example, in milk processing, homogenization, pasteurization, and packaging are each unit operations which are connected to create the overall process. A process may require many unit operations to obtain the desired product from the starting materials, or feedstocks.

Temperature control device and oscillator

ActiveUS20150130546A1Shorten the temperature stabilization timeReduced Temperature Stability RequirementsRadiation pyrometryThermometers using electric/magnetic elementsUnit operationProcess engineering
A temperature control device includes a temperature detector, a difference operation unit, a controller, a saturation processing circuit unit, a rewritable storage unit, and a conversion unit. The difference operation unit operates a digital value corresponding to a difference value between a detected temperature value and a target temperature. The controller calculates a manipulated variable using the digital value operated by the difference operation unit. The saturation processing circuit unit includes a digital circuit to limit an output value of the controller to a pre-set upper limit value. The rewritable storage unit stores the upper limit value read from a storage area of the rewritable storage unit and input into the saturation processing circuit unit. The conversion unit converts the output value of the saturation processing circuit unit into an analog signal to output the converted value as a control command value to the heater.
Temperature control device and oscillator
Temperature control device and oscillator
Temperature control device and oscillator
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Owner:NIHON DEMPA KOGYO CO LTD

Heat pump unit and control method

PendingCN110332726AReduce procurement costsReduce installation costsMechanical apparatusFluid circulation arrangementFour-way valveUnit operation
The invention provides a heat pump unit and a control method. The heat pump unit comprises a compressor, an outdoor heat exchanger, a four-way valve, a radiation heat exchange device, an indoor heat exchange device and a hot water device; the radiation heat exchange device is connected with the outdoor heat exchanger and the four-way valve; the indoor heat exchange device is connected with the outdoor heat exchanger and the four-way valve; and the hot water device is connected with the compressor and the four-way valve. The radiation heat exchange device is used for refrigerating or heating byrefrigerant circulation; the indoor heat exchange device is used for refrigerating or heating by refrigerant circulation; the hot water device is used for heating water through refrigerant circulation; and the radiation heat exchange device, the indoor heat exchange device and the hot water device can be operated and stopped selectively. One set of unit operation has realized refrigerating, heating and heating water, and different heat exchange devices all exchange heat through the refrigerant circulation, so that the efficiency is high, and the power consumption is little; and the radiationheat exchange device adopts the heat exchange mode of radiation, and comfort and commonality are high.
Heat pump unit and control method
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Owner:GREE ELECTRIC APPLIANCES INC

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