Low-noise low-energy-consumption refrigerating system and working method thereof

Abstract

The invention discloses a low-noise low-energy-consumption refrigerating system and a working method thereof. The refrigerating system comprises a compressor, wherein an outlet of the compressor is connected with an inlet of a condenser; an outlet of the condenser is connected with an inlet of a drying filter; an outlet of the drying filter is connected with an inlet section of a capillary tube; an outlet section of the capillary tube is connected with an inlet tube of an evaporator; the inlet tube of the evaporator is connected with the evaporator; the evaporator is connected with an outlet tube of the evaporator; the outlet tube of the evaporator is connected with an inlet of a low-pressure liquid storage device; an outlet of the low-pressure liquid storage device is connected with an inlet of an air return tube; the outer wall surface of the capillary tube between the inlet section of the capillary tube and the outlet section of the capillary tube is sequentially attached to the outer wall surfaces of the outlet tube of the evaporator, the low-pressure liquid storage device and the air return tube; and an outlet of the air return tube is connected with the compressor. Accordingto the low-noise low-energy-consumption refrigerating system and the working method thereof, a multi-section heat return mode is utilized, so that the dryness of a refrigerant at the outlet of the capillary tube is reduced, and the energy consumption of the system is reduced while the noise of the refrigerating system is reduced.

Description

technical field [0001] The invention belongs to the technical field of refrigeration, and in particular relates to a refrigeration system with low noise and low energy consumption and a working method thereof. Background technique [0002] Refrigerators and freezers are indispensable refrigeration and refrigeration equipment in modern life. At present, the common refrigerators and freezers are all based on the vapor compression refrigeration technology to achieve the purpose of refrigeration. For reasons of cost and operational stability, the throttling mechanism of this type of technology generally adopts capillary tubes. However, in daily use, a refrigeration system that uses a capillary tube as a throttling mechanism will generate irregular noise with a very large fluctuation range of sound pressure level at the outlet of the capillary tube or the inlet of the evaporator, and the user experience is extremely poor. The reason for the noise here can be explained as: in th...

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Problems solved by technology

[0004] In fact, this scheme of using the low-temperature refrigerant gas in the return air pipe to supercool the refrigerant in the capillary also has shortcomings. First, the refrigerant inside the evaporator is relatively dry, and the amount of liquid carried in the pipeline at the outlet of the evaporator cannot Guaranteed, the heat transfer of the entire evaporator is limited, and the refrigerant gas in the return air pipe is easily overheated and cannot provide enough cooling capacity for subcooling

Secondly, the length of the heat exchange between the return air pipe and the capillary is limited, and part of the supercooled refrigerant will still produce a large amount of gas flash in the middle and rear of the capillary, resulting in high dryness of the refrigerant at the outlet of the capillary and noise.

In addition, during the actual operation of refrigeration systems such as refrigerators, the refrigerant at the outlet of the evaporator is generally in a two-phase state, and the pipeline at the outlet of the evaporator is connected to the liquid receiver, return air pipe and other components. Its installation position has been wrapped by the foam layer and deviates from the inner wall of the freezer or refrigerator, which means that the last part of the pipeline at the outlet of the evaporator cannot produce the actual cooling effect

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