What device controls the flow of weak liquor to the absorber in a refrigeration system?

The throttling device is responsible for controlling the flow of weak liquor to the absorber in a refrigeration system. This component works by restricting the flow, thereby managing the pressure and ensuring the right amount of weak liquor enters the absorber for efficient operation. In a refrigeration context, maintaining the correct flow rate is crucial for maximizing heat exchange and optimizing the overall performance of the system. The throttling device effectively balances the system to allow proper vapor-liquid contact within the absorber, facilitating the absorption process in the refrigeration cycle.

In contrast, while gas pressure regulators control the pressure of gases in various systems and float valves maintain liquid levels by automatically adjusting flow, they do not specifically manage the flow to an absorber. Likewise, pressure switches serve primarily as safety devices to monitor and maintain desired pressure levels, but they do not directly regulate the flow of fluids in the same way that a throttling device does. Understanding the specific function and purpose of each type of device helps clarify why the throttling device is the correct choice in this scenario.