Lithium bromide absorption type refrigerating machine and refrigerating method thereof

Abstract

The invention discloses a lithium bromide absorption type refrigerating machine and a refrigerating method thereof. The refrigerating machine comprises an absorber, an evaporator and a condenser, and also comprises a first-stage gas bubble pump, a second-stage gas bubble pump, a gas-liquid separator I, a gas-liquid separator II, a heat exchanger I and a heat exchanger II, wherein the absorber is sequentially connected with the heat exchanger II, the heat exchanger I, the first-stage gas bubble pump and the gas-liquid separator I, and the gas-liquid separator I is respectively connected with the second-stage gas bubble pump and the heat exchanger I; the second-stage gas bubble pump is respectively connected with the heat exchanger I and the gas-liquid separator II, and the gas-liquid separator II is respectively connected with the condenser and the heat exchanger II; and the heat exchanger II is connected with the absorber, and the condenser is connected with the evaporator through a throttle pressure relief valve. The invention adopts two stages of gas bubble pumps, so that the lift height of solution is increased, thereby allowing the adjustment range of the relative height of the absorber and the condenser to be larger, and simultaneously improving condensing pressure, i.e., broadening the adjustment range of the condensing pressure so as to allow the application conditions of the unit to be looser.

Description

technical field [0001] The invention relates to an air-conditioning refrigeration technology, in particular to a lithium bromide absorption refrigerator and a refrigeration method thereof. Background technique [0002] The traditional lithium bromide absorption refrigeration device is composed of generator, condenser, evaporator, absorber, solution circulation pump, throttle valve and other components. Absorbent lithium bromide aqueous solution, the two constitute a working medium pair. The dilute mixed solution is heated in the generator, and a certain flow of refrigerant vapor is separated and enters the condenser. The vapor is cooled in the condenser and condenses into a liquid; the liquid refrigerant enters the evaporator to absorb heat after throttling and reducing pressure. Evaporation produces a refrigeration effect, and the refrigerant changes from a liquid state to a gas state and enters the absorber; in addition, the concentrated solution flowing out of the genera...

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Problems solved by technology

[0004] However, the above-mentioned pumpless technology has the following problems: the lifting height and condensing pressure of the single-stage bubble pump are low, and the pump efficiency is also very low under water-cooled conditions; under the working conditions of the traditional mechanical pump lithium bromide absorption refrigerator, even Not functioning properly, let alone air cooling condensation

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