Switching power supply, feedback control circuit and method thereof and water dispenser

Abstract

The invention provides a switching power supply, a feedback control circuit and method thereof and a water dispenser. The circuit comprises a temperature bulb and a first voltage control unit; the resistance of the temperature bulb changes with the ambient temperature; and the first voltage control unit adjusts output of a first voltage, namely the load power supply, according to temperature change. Output of the first voltage is adjusted according to temperature change by keeping the first voltage in a first threshold voltage value when the temperature is lower than a first temperature, and the first threshold voltage value does not cause further decrease of the ambient temperature. According to schemes provided by the invention, when the detected temperature is lower than a specific value, output to the load power of the switching power supply does not cause further decrease of the temperature, it is ensured that the system has stable performance, and energy consumption is reduced.

Description

technical field [0001] The invention relates to a switching power supply, in particular to a feedback control circuit and method of the switching power supply, a switching power supply and a water dispenser. Background technique [0002] In the prior art, switching power supplies are mostly in fixed or segmented output voltage mode. When the traditional switching power supply is used in the existing electrical appliances with cooling function, such as water dispensers, when the ambient temperature is very low, the output power provided by the switching power supply to the load will still cause the temperature to continue to drop, which will eventually lead to The water freezes and ice blockage occurs. [0003] If the power is completely cut off after cooling, and the cooling components stop working, the water temperature will rise rapidly, and cooling will resume in a short time. The final result will increase the overall power consumption, and the energy efficiency level w...

AI Technical Summary

Problems solved by technology

When the traditional switching power supply is used in the existing electrical appliances with cooling function, such as water dispensers, when the ambient temperature is very low, the output power provided by the switching power supply to the load will still cause the temperature to continue to drop, which will eventually lead to The water freezes, and ice blockage occurs

[0003] If the power is completely cut off after the cooling is finished, and the cooling components stop working, the water temperature will rise rapidly, and the cooling will resume in a short time. The final result will increase the overall power consumption, and the energy efficiency level will hardly meet the specified requirements.

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