Absorption refrigerator

The patent uses temperature sensors as intermediary devices to indirectly measure concentration. Instead of directly measuring concentration with a concentration meter, the system measures temperature at multiple points in the circulation cycle and uses these temperature readings as intermediate data to calculate concentration through an approximation function, thereby avoiding the need for a concentration meter.

The patent replaces the mechanical/chemical measurement system (concentration meter) with a thermal measurement system (temperature sensors). By substituting direct concentration measurement with temperature-based indirect measurement and calculation, the system achieves concentration determination without the complexity and cost of a concentration meter.

The patent introduces temperature sensors as intermediary measurement devices that can operate in the vacuum environment without compromising it. These temperature sensors serve as mediators that provide the necessary concentration information through temperature measurements, eliminating the need to install a concentration meter that would deteriorate the vacuum environment.

The patent creates a thermal model (approximation function) that copies the relationship between temperature and concentration. Instead of directly measuring concentration with a physical meter, the system uses temperature data to calculate concentration through the approximation function, effectively creating a virtual concentration measurement that preserves the vacuum environment.

The patent segments the temperature measurement into multiple discrete points throughout the circulation cycle (regenerator, condenser, evaporator, absorber, and solution heat exchanger). Instead of using a single evaporator temperature reading, the system divides the measurement into multiple temperature points that collectively provide more accurate concentration information when applied to the approximation function.

The patent transitions from one-dimensional temperature measurement (single evaporator temperature) to multi-dimensional temperature measurement (multiple temperature points in the circulation cycle). By adding spatial dimensionality to the temperature measurements and using them collectively in the approximation function, the system achieves more precise concentration estimation while maintaining simple device architecture.

The patent implements a feedback control system that continuously monitors temperature at multiple points, calculates concentration using the approximation function, and adjusts control parameters accordingly. This real-time feedback enables precise control of the absorption liquid concentration, allowing the system to operate reliably close to optimal conditions without excessive safety margins that would cause frequent shutdowns.

The patent dynamically adjusts control parameters (such as heating amount in the regenerator or solution flow rates) based on the calculated concentration from the approximation function. By changing these parameters in response to real-time concentration data, the system maintains reliable operation with accurate concentration control, eliminating the need for excessive safety factors and associated frequent shutdowns.