Acid Purifier with Integrated Liquid Level Control and Peltier Cooling

The patent introduces a thermally conductive adhesive layer as an intermediary between the temperature sensor and the container inner wall. This adhesive layer has high thermal conductivity to efficiently transmit heat from the acid liquid to the sensor, while the sensor remains protected inside the container. The adhesive layer resolves the contradiction by providing both thermal coupling for accurate measurement and physical protection for the sensor.

The patent replaces the mechanical multi-position controller with a digital temperature controller that features continuous adjustable temperature settings. This digital controller can precisely set and maintain specific temperature values, eliminating the coarse stepped control of mechanical switches. The digital system provides accurate temperature control while maintaining reasonable device complexity through integrated electronics.

The patent employs a Peltier semiconductor cooler that actively controls the condensation temperature through electrical parameter adjustment. By applying voltage to the Peltier device, the system can precisely control the temperature difference between the condensation surface and the cooling water, ensuring efficient condensation regardless of ambient air temperature or water temperature variations. This active thermal management maintains high condensation efficiency while using a relatively simple solid-state device.

The patent replaces open flame or resistance wire heating with a PTC (Positive Temperature Coefficient) ceramic heater. This solid-state heating element converts electrical energy to thermal energy without open flame, eliminating the fire hazard. The PTC material inherently limits maximum temperature through its positive temperature coefficient characteristic, providing automatic safety protection. This modern heating method maintains simplicity while removing the harmful combustion effects.

The patent introduces an automatic liquid level feedback control system using ultrasonic sensors to continuously monitor the liquid level in the container. When the liquid level drops below a safe threshold, the system automatically sends feedback signals to stop heating or add liquid, preventing dry burning and fire hazards. This closed-loop feedback mechanism eliminates reliance on manual inspection while maintaining reasonable system complexity through automated control.

The patent implements automatic liquid level feedback control using ultrasonic sensors positioned at the maximum fill level. When the liquid reaches this level, the sensor provides feedback to automatically stop liquid addition, preventing overflow and corrosion of surrounding objects. This simple yet effective feedback mechanism maintains safety without adding complex control systems.