Two-stage-throttling incomplete-intercooling double-duty refrigerating system
A secondary throttling and refrigeration system technology, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problem of large one-time investment in the system, achieve less one-time investment, reduce one-time investment, and avoid temperature fluctuating effect
Active Publication Date: 2015-03-11
TIANJIN BOJUYUAN LIGHT IND DAILY CHEM IDENTIFICATION SCI RES
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Problems solved by technology
[0004] For the parallel system of frozen cold storage (lower suction temperature, usually requires a two-stage compression system) and cold storage (higher suction temperature, usually requires a single-stage vapor compression system), it is often necessary to use single and double-stage vapor compression systems. Separately configured, the one-time investment of the system is large, and the adjustment of cooling capacity is completely realized by starting and stopping
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[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0022] figure 1 Shown is a schematic diagram of the dual-working condition refrigeration system with secondary throttling and incomplete cooling in the middle of the present invention, including multiple groups connected in parallel between the high-temperature suction pipeline 1, the low-temperature suction pipeline 2 and the medium-pressure liquid supply pipeline 3 Variable flow compression condensing unit. Each group of variable flow compression condensing units includes a low-pressure constant-flow compressor 4, a low-pressure variable-flow compressor 5, a high-pressure variable-flow compressor 6, a first check valve 7-1, a second check valve 7-2, and a second check valve 7-2. Three check valves 7-3, first valve 8-1, second valve 8-2, third valve 8-3, fourth valve 8-4, fifth valve 8-5, sixth valve 8-6, Condenser 9, intercooler 1...
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The invention discloses a two-stage-throttling incomplete-intercooling double-duty refrigerating system and provides a system which allows for variable-flow single-stage steam compression cycle and which also allows for variable-flow two-stage-throttling incomplete-intercooling two-stage compression cycle. The system comprises a plurality of variable-flow compression condensing units parallelly connected among a low-temperature suction pipeline, a high-temperature suction pipeline and a medium-pressure liquid supply pipeline. Each variable-flow compression condensing unit comprises a low-pressure constant-flow compressor, a low-voltage variable-flow compressor, a high-pressure variable-flow compressor, a first one-way valve, a second one-way valve, a third one-way valve, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve, a condenser, an intercooler and a throttle valve. By controlling the valves to open or close, the high-temperature suction pipeline can take in air to allow for single-stage-compression refrigerating cycle so that liquid is supplied to the medium-pressure liquid supply pipeline, and the low-temperature suction pipeline can take in the air to allow for two-stage-compression refrigerating cycle so that the liquid is supplied to the medium-pressure liquid supply pipeline.
Description
technical field [0001] The invention relates to the technical field of refrigeration, in particular to a two-stage compression refrigeration system with secondary throttling and incomplete cooling in the middle of a secondary throttling that adjusts the cooling capacity by changing the flow rate of the refrigerant. Background technique [0002] The existing two-stage compression refrigeration system used for freezing cold storage usually uses temperature control to start and stop the compressor. When the temperature of the cold storage reaches the temperature set by the thermostat, the refrigeration system stops working; when the temperature rises to the upper limit set by the thermostat, The cooling system is on. There is a contradiction in such a system. When the temperature difference between startup and shutdown is relatively large, the food stored in the frozen storage will lose water and dryness due to different freezing rates, and food quality will decline; when the t...
Claims
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IPC IPC(8): F25B7/00F25B41/04F25B41/06F25B41/20F25B41/31
Inventor 杨永安臧润清阳飞王丹丹邓萍萍李照凯乔晓光徐浩
Owner TIANJIN BOJUYUAN LIGHT IND DAILY CHEM IDENTIFICATION SCI RES