3results about How to "Stable and reliable working condition" patented technology

The invention discloses a double-temperature condensation heat pump system, a control method and a clothes dryer, and the system comprises a double-stage compressor with a low-pressure-stage air cylinder and a high-pressure-stage air cylinder, a flow dividing control unit, a low-temperature heating loop, a high-temperature heating loop, an unloading protection unit and a control system. A refrigerant can be distributed to different heating loops according to the proportion, so that continuous adjustable output of low-temperature, medium-temperature and high-temperature heat is achieved, a high-pressure-stage air cylinder keeps low-power-consumption operation under the low-load working condition through an unloading protection structure, the reliability and the energy efficiency level of the system are improved, and the energy efficiency is improved. According to the control method, a low-temperature mode, a high-temperature mode or a mixed mode is selected according to the target temperature, closed-loop adjustment is carried out, the temperature adjusting process is stable and continuous, the invention further discloses a clothes dryer adopting the system, appropriate temperatures can be provided in different drying stages, the drying efficiency is improved, clothes damage is reduced, and the clothes dryer is suitable for being used in different drying stages. And meanwhile, the device has the advantages of compact structure, stable operation and wide application range.

This invention relates to the technical field of high-pressure heaters and discloses a heat dissipation device for a thick-film high-pressure heater, comprising a flow channel shell assembly, a flow channel heat-conducting component fixedly installed above the flow channel shell assembly, a liquid mounting cavity between the flow channel shell assembly and the flow channel heat-conducting component, and an equipment mounting groove inside the flow channel heat-conducting component; a heat insulation layer, a thick-film heater, and an inorganic heat-conducting layer are fixedly installed inside the equipment mounting groove; the flow channel heat-conducting component is provided with several sets of S-shaped guide fins, and the flow channel shell assembly is provided with a spiral guide component; this invention, through the matching arrangement of the thick-film heater and the inorganic heat-conducting layer, ensures that the thick-film heater is completely placed inside the equipment mounting groove, forming a physical isolation state from the antifreeze in the liquid mounting cavity, preventing direct contact with the liquid, and effectively avoiding damage such as corrosion, erosion, and scaling caused by the antifreeze to the heating element.

The utility model relates to radio frequency power amplifier technical field, concretely relates to a radio frequency power amplifier power supply circuit with bidirectional current drive, including two -way negative voltage protection circuit, second circuit, third circuit, fourth circuit, fifth circuit and sixth circuit, two -way negative voltage protection circuit is used for monitoring main road grid negative voltage Vgs main and peak value grid negative voltage Vgs peak, and is turned off drain electrode power VDS when any road negative voltage loss, second circuit is used for 50V direct current voltage to 12V, third circuit is used for 12V direct current voltage to 5V, fourth circuit is used for direct current 5V conversion direct current 5V, fifth circuit is used for direct current 5V conversion direct current 5.8V, sixth circuit is used for direct current 5V to direct current 2.5V, and increases bidirectional current drive ability, and the power supply of main road grid negative voltage Vgs main. The problem that the existing DC / DC negative voltage chip negative voltage adjustment is complex, current carrying capacity is insufficient and lacks bidirectional current drive ability has been solved.