Application structure of electromagnetic valve

Abstract

The invention discloses an application structure of an electromagnetic valve. The application structure comprises enhanced vapor injection compressors, an oil separator, a condenser, a heat exchanger,a throttle valve and an evaporator, wherein the enhanced vapor injection compressors comprise an air intake pipeline, an air discharging pipeline and an air injection pipeline, and the air discharging pipeline of the enhanced vapor injection compressors, the oil separator, the condenser, the heat exchanger, the evaporator and the air intake pipeline are sequentially connected to form a main loop;the air discharging pipeline, the oil separator, the condenser, the throttle valve, the heat exchanger and the air injection pipeline are sequentially connected to form an injection loop; and the application structure further comprises a variable-flow compressor unit, the air discharging end of the variable-flow compressor unit is communicated with the air discharging pipeline, the air intake endof the variable-flow compressor unit is communicated with the air intake pipeline, and the enhanced vapor injection compressors and the variable-flow compressor unit are connected with the air intakepipeline through air intake electromagnetic valves correspondingly. According to the application structure, through on-off control of the air intake electromagnetic valves, the selection of the air intake pipeline for the compressors is achieved, so that a frequency conversion function is achieved; and the application structure is controllable in whole structure and can be suitable for various working conditions.

Description

technical field [0001] The invention relates to the field of low-temperature condensing units, in particular to an application structure of a solenoid valve. Background technique [0002] The common demand temperature in the current frozen storage is 0°C~-20°C. Some cold storages used in oceangoing and medical research require the temperature to reach a low temperature of -30°C~-40°C. At present, the use of air injection to increase enthalpy is used for this temperature. To further reduce and maintain the low temperature of -40°C, currently a single compressor with air injection and enthalpy increase is used for the refrigeration cycle, but usually when the required temperature of the cold storage is not so low, frequency conversion is used to achieve energy saving, which is a waste of energy Great savings. [0003] The purpose of this application is: how to provide a condensing unit with air jet enthalpy increase and frequency conversion. Contents of the invention [00...

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Problems solved by technology

[0002] The common demand temperature in the current frozen storage is 0°C~-20°C. Some cold storages used in oceangoing and medical research require the temperature to reach a low temperature of -30°C~-40°C. At present, the use of air injection to increase enthalpy is used for this temperature. To further reduce and maintain the low temperature of -40°C, currently a single compressor with air injection and enthalpy increase is used for the refrigeration cycle, but usually when the required temperature of the cold storage is not so low, frequency conversion is used to achieve energy saving, which is a waste of energy great savings

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