Hot-water direct-fired lithium bromide absorption type cold water and cold-hot water unit

Abstract

The invention relates to a hot-water direct-fired lithium bromide absorption type cold water and cold-hot water unit which comprises a direct-fired high pressure generator (6), an evaporator (22), an absorber (1), a hot-water generator (15), a vapour generator (17), a condenser (21), a high-temperature heat exchanger (5), a low-temperature heat exchanger (3), a solution pump (23), a cryogenic fluid pump (24), pipelines which connect each part, and a valve, wherein a hot-water heat exchange tube bundle (18) of the hot-water generator (15) and a vapour heat exchange tube bundle (19) of the vapour generator (17) are arranged in a same cylinder body (20), a splitter plate (16) is arranged between the hot-water heat exchange tube bundle (18) and the vapour heat exchange tube bundle (19), a return tube (14) is arranged in the hot-water generator (15), and a low-temperature solution inlet pipe of the high-temperature heat exchanger (5) is provided with a boosting pump (4). The hot-water direct-fired lithium bromide absorption type cold water and cold-hot water unit can simultaneously or respectively utilize heat drive generated by hot water or directly burning fuel to match and control the cooling operation.

Description

(1) Technical field [0001] The invention relates to a lithium bromide absorption type cold water and hot and cold water unit. It belongs to the technical field of air conditioning equipment. (2) Background technology [0002] In the past, cooling operation could be driven by hot water (such as solar hot water, geothermal hot water, waste hot water generated in various production processes, etc.) and heat generated by direct combustion of fuel at the same time or separately, and heat generated by direct combustion of fuel Driven for heating operation, hot water direct-fired dual-purpose lithium bromide absorption chiller and hot water unit used to provide cold (hot) water for air conditioning, such as figure 1 As shown, the low-pressure generator 34 of the unit adopts a hot water steam composite generator structure, and the dilute solution communication pipe 26 between the low-temperature heat exchanger 3 and the low-pressure generator is provided with an electric regulating...

AI Technical Summary

Problems solved by technology

[0003] 1. Electric control valves and solenoid valves must use high air-tightness and high reliability valves, which brings difficulties to the selection of purchased parts (the valves available in the market are either expensive or their performance cannot meet the requirements);

[0004] 2. When the unit uses the heat of hot water and the heat generated by direct combustion of fuel to drive cooling operation, the operating frequency of the solution pump 23 is automatically controlled according to the pressure of the direct combustion high-pressure generator 6, and the opening of the electric control valve must be adjusted at the same time Control to reduce the amount of dilute solution entering the low-pressure generator, the control is difficult, and it is difficult to achieve a good match between the distribution of solution circulation and the complementary heating amount

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