Self-pressurization type lithium bromide bubbling absorption device and control method thereof

Abstract

The invention discloses a self-pressurization type lithium bromide bubbling absorption device and a control method thereof. Bubbling under negative pressure is implemented by utilizing a pressurization technology. In a vapor system, water vapor is pressurized through a variable-frequency booster pump so that the water vapor can successfully bubble in a lithium bromide solution in the vacuum state.A micro-pressure one-way balance valve is used for pressure balancing, wherein the micro-pressure one-way balance valve is arranged at an inlet of a gas exhaust pipe, the vapor which is not absorbedyet is quickly exhausted to balance system internal pressure, and then it can be guaranteed that an absorber has the stable vacuum state inside. With the self-pressurization type lithium bromide bubbling absorption device and the control method thereof, the lithium bromide solution bubbling and absorption process in the vacuum state is implemented, an effective path and effective measures are provided for heat and mass transfer performance of a lithium bromide absorption type cooling or heat pump and improvement on an internal absorption effect of a lithium bromide absorption type cooling or heat pump unit, and the device and the control method thereof have significance in improvement on the performance of and the miniaturization optimal design of an absorption type cooling or heat pump system.

Description

technical field [0001] The invention relates to an absorber in an absorption refrigerator, in particular to a self-pressurized lithium bromide bubbling absorption device and a control method thereof. Background technique [0002] Absorption refrigeration / heat pump technology occupies an important position in the field of refrigeration, air conditioning and waste heat recovery due to the advantages of low-grade heat consumption and no pollution to the environment, while the performance of absorption refrigeration machines depends to a large extent on the absorption performance of the absorber. Improving the physical structure and absorption mode of the absorber is an effective means to improve the performance of the whole machine. At present, there are two absorption methods of the absorber: falling film absorption and bubbling absorption. The bubbling absorption has the characteristics of large absorption area and good heat transfer effect because the absorption gas fully co...

AI Technical Summary

Problems solved by technology

Ammonia water bubbling absorption started earlier and is suitable for producing cooling capacity below 0°C, but due to the characteristics of ammonia water poisoning and high-pressure operation, the safety cannot be guaranteed; while lithium bromide absorption refrigeration is suitable for producing cooling capacity above 0°C, However, the working condition that the absorption process needs to be operated in a vacuum restricts the development of lithium bromide bubbling absorption.

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