Refrigerating system and refrigerating equipment

Abstract

The utility model discloses a refrigerating system and refrigerating equipment, and relates to the technical field of refrigerating equipment, the refrigerating system comprises a compressor, a condenser, a capillary tube and an evaporator, the compressor, the condenser, the capillary tube and the evaporator are communicated in sequence; the refrigerating system further comprises a gas-liquid separator, the capillary tube comprises a first branch tube and a second branch tube, the first branch tube is communicated with an outlet of the condenser and an inlet of the gas-liquid separator, and the second branch tube is communicated with a liquid outlet of the gas-liquid separator and a first inlet of the evaporator. The evaporator is further provided with a second inlet, and a gas outlet of the gas-liquid separator is communicated with the second inlet. According to the refrigerating system and the refrigerating equipment, noise can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and in particular to a refrigeration system and refrigeration equipment. Background Technology

[0002] In the field of modern home appliances, the noise reduction performance of refrigerators has become one of the key indicators for measuring product quality. With the continuous development of refrigerator manufacturing technology, the noise levels of traditional main noise sources such as compressor compartment mechanical noise and fan duct aerodynamic noise have been significantly reduced through optimizing compressor structural design and improving the aerodynamic performance of fan ducts.

[0003] However, with the effective control of the aforementioned traditional noise sources, the problem of refrigerant flow noise inside the refrigerator has gradually become more prominent, becoming a bottleneck restricting further improvement in the overall noise reduction performance of the refrigerator. Therefore, how to effectively suppress or reduce refrigerant noise in refrigerators has become a core technical problem that urgently needs to be solved in the field of refrigerator noise control. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a refrigeration system and refrigeration equipment that can reduce noise.

[0005] This utility model also proposes a refrigeration device having the above-mentioned refrigeration system.

[0006] According to a first aspect of the present invention, the refrigeration system includes a compressor, a condenser, a capillary tube, and an evaporator, wherein the compressor, the condenser, the capillary tube, and the evaporator are connected in sequence.

[0007] The refrigeration system further includes a gas-liquid separator, and the capillary tube includes a first branch pipe and a second branch pipe. The first branch pipe connects the outlet of the condenser with the inlet of the gas-liquid separator, and the second branch pipe connects the liquid outlet of the gas-liquid separator with the first inlet of the evaporator.

[0008] The evaporator also has a second inlet, and the outlet of the gas-liquid separator is connected to the second inlet.

[0009] The refrigeration system according to the embodiments of this utility model has at least the following beneficial effects:

[0010] By installing a gas-liquid separator, with its inlet connected to the first branch pipe, its liquid outlet connected to the second branch pipe, and its gas outlet connected to the second inlet of the evaporator, the gas-liquid mixture in the capillary tube flows into the gas-liquid separator from the first branch pipe. There, it is separated. The gaseous refrigerant is directly discharged into the evaporator through the second inlet, while the liquid refrigerant is discharged into the evaporator through the second branch pipe. This reduces the refrigerant pressure at the outlet of the second branch pipe, lowers its dryness, and thus reduces refrigerant jetting and cavitation noise, achieving noise reduction. Furthermore, directly discharging the gaseous refrigerant into the evaporator allows it to participate in heat exchange within the evaporator.

[0011] According to some embodiments of the present invention, the evaporator includes a coil, one end of which has a first inlet of the evaporator, and the other end of which has an outlet of the evaporator;

[0012] The second inlet is located in the coil along the refrigerant flow direction within the coil. The second inlet is situated between the first inlet and the outlet of the evaporator, and the length of the coil between the second inlet and the first inlet is equal to or greater than half the total length of the coil.

[0013] According to some embodiments of the present invention, the refrigeration system includes a return pipe, which connects the outlet of the evaporator to the inlet of the compressor, and a portion of the capillary tube is attached to the return pipe.

[0014] According to some embodiments of the present invention, the second branch pipe includes a first sub-pipe segment, which is attached to the return pipe and extends along a spiral trajectory around the outer circumferential surface of the return pipe.

[0015] According to some embodiments of the present invention, along the extension direction of the return pipe, the refrigerant flow direction in the capillary tube is opposite to the refrigerant flow direction in the return pipe.

[0016] The second branch pipe also includes a second sub-pipe section, which is attached to the return pipe and extends along the axial direction of the return pipe. The first sub-pipe section is located between the second sub-pipe section and the evaporator.

[0017] According to some embodiments of the present invention, a portion of the first branch pipe is attached to the return gas pipe.

[0018] According to some embodiments of the present invention, the evaporator includes a coil having a first inlet and an outlet of the evaporator;

[0019] The refrigeration system includes a gas guide pipe that connects the outlet of the gas-liquid separator to the second inlet of the evaporator, wherein the diameter of the gas guide pipe is not less than half the diameter of the coil.

[0020] According to some embodiments of the present invention, the refrigeration system includes a gas guide pipe, which connects the gas outlet of the gas-liquid separator with the second inlet of the evaporator, wherein a silencer is provided on the gas guide pipe.

[0021] According to some embodiments of the present invention, the gas outlet of the gas-liquid separator is located above the liquid outlet of the gas-liquid separator.

[0022] According to some embodiments of the present invention, the inlet of the gas-liquid separator is located above the outlet of the gas-liquid separator.

[0023] According to some embodiments of the present invention, the gas outlet of the gas-liquid separator is located at the top of the gas-liquid separator.

[0024] The refrigeration device according to a second aspect of the present invention includes the refrigeration system described in the above embodiments.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0027] Figure 1 This is a schematic diagram of a capillary noise reduction structure in related technologies;

[0028] Figure 2 This is a schematic diagram of another capillary noise reduction structure in related technologies;

[0029] Figure 3 This is a simplified schematic diagram of a refrigeration system according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of a refrigeration system according to an embodiment of the present invention.

[0031] Icon labels:

[0032] 100. Evaporator; 110. Second inlet; 120. Coil;

[0033] 200. Capillary tube; 210. First branch tube; 220. Second branch tube; 221. First sub-tube segment; 222. Second sub-tube segment;

[0034] 300. Return pipe; 310. Straight pipe section; 320. Bend pipe section;

[0035] 400. Gas-liquid separator;

[0036] 500. Air delivery tube;

[0037] 600. Muffler. Detailed Implementation

[0038] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0040] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0041] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0043] In the description of the embodiments of this application, the technical terms "top", "bottom", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0044] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0045] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0046] With technological advancements, the noise levels of traditional major noise sources, such as mechanical noise within the compressor compartment and aerodynamic noise from the fan duct, have significantly decreased. This has led to a growing prominence of refrigerant flow noise within refrigerators, with refrigerant jetting and cavitation sounds being the main components of this noise. Particularly in practical single-stage vapor compression refrigeration systems, because the condenser cannot completely liquefy the high-temperature, high-pressure gas, some gas remains in the capillary tube. When this gas-liquid mixture enters the evaporator, the excessively high gas phase ratio (high dryness) reduces the effective heat exchange area of ​​the evaporator, increases the flow resistance at the front of the evaporator, and generates strong refrigerant jetting and cavitation sounds at the capillary tube outlet.

[0047] Please refer to Figure 1 One technical solution provides a capillary silencing structure, which adds two expansion chamber silencers 600 after the capillary tube 200 to reduce refrigerant noise. However, the two-phase flow refrigerant in the refrigerator is a gas-liquid mixture, and its flow state is complex and unstable. The environment in which it generates sound includes the formation and collapse of bubbles and the fluctuation of the gas-liquid interface. The frequency and intensity of these sounds are variable. The expansion chamber silencer 600 is only effective for noise in a specific frequency range, and it is difficult to fully cover and eliminate the broadband noise generated by the two-phase flow refrigerant.

[0048] Please refer to Figure 2Another technical solution provides a capillary silencing structure, which reduces the diameter of the capillary tube at the rear end of the capillary tube 200 outlet to reduce noise. However, this has a negative impact on the refrigerant flow and the service life of the capillary tube 200, which is not conducive to the normal operation of the refrigerator in actual work.

[0049] Another technical solution provides a refrigeration system including a gas-liquid separator. The outlet of the gas-liquid separator is connected to the suction end of the compressor. Under certain operating conditions, this allows gas to bypass the capillary tube and evaporator and be directly discharged into the suction end of the compressor, thereby avoiding liquid slugging in the compressor. However, the method of discharging the separated gas into the compressor by bypassing the evaporator prevents the separated gas from exchanging heat in the evaporator, which to some extent affects the efficiency of the evaporator.

[0050] Please refer to the following for details. Figure 3 and Figure 4 This application provides a refrigeration system suitable for refrigeration equipment such as refrigerators. The refrigeration system includes a compressor, a condenser, a capillary tube 200, and an evaporator 100, which are connected in sequence.

[0051] The compressor provides power for the refrigeration cycle. Refrigerant flows from the compressor's outlet to the condenser, where it releases heat and liquefies. The refrigerant exiting the condenser enters a capillary tube 200, which connects the compressor and the evaporator 200. The capillary tube 200 reduces the pressure of the refrigerant, converting it into a low-temperature, low-pressure liquid. The refrigerant then flows further from the capillary tube 200 into the evaporator 100, where it evaporates to absorb heat from the refrigerator, achieving the cooling effect. The refrigeration system includes a return pipe 300, which connects the outlet of the evaporator 100 to the compressor's suction end. The refrigerant that has passed through the evaporator 100 flows back to the compressor through the return pipe 300 to complete the refrigeration cycle.

[0052] The refrigeration system also includes a gas-liquid separator 400, which is used to separate the gaseous refrigerant from the liquid refrigerant. The capillary tube 200 includes a first branch pipe 210 and a second branch pipe 220. The first branch pipe 210 connects the outlet of the condenser to the inlet of the gas-liquid separator 400, allowing refrigerant to flow from the condenser into the first branch pipe 210 and continue flowing to the gas-liquid separator 400. The second branch pipe 220 connects the liquid outlet of the gas-liquid separator 400 to the first inlet of the evaporator 100, allowing liquid refrigerant to flow from the liquid outlet of the gas-liquid separator 400 and through the second branch pipe 220 into the evaporator 100.

[0053] The evaporator 100 has a second inlet 110, and the outlet of the gas-liquid separator 400 is connected to the second inlet 110.

[0054] In the above embodiment, the gas-liquid mixed refrigerant in the capillary 200 flows into the gas-liquid separator 400 from the first branch pipe 210, where it is separated. The gaseous refrigerant is directly discharged into the evaporator 100 through the second inlet 110, while the liquid refrigerant is discharged into the evaporator 100 through the second branch pipe 220. This reduces the refrigerant pressure at the outlet of the second branch pipe 220 and lowers the dryness at the outlet of the second branch pipe 220, thereby reducing the refrigerant jetting sound and cavitation sound, achieving a noise reduction effect. Furthermore, directly discharging the gaseous refrigerant into the evaporator 100 also allows the gaseous refrigerant to participate in the heat exchange of the evaporator 100.

[0055] In some embodiments, the evaporator 100 includes a coil 120 in which refrigerant flows, one end of the coil 120 having a first inlet for the evaporator 100, and the other end of the coil 120 having an outlet for the evaporator 100.

[0056] The second inlet 110 is located in the coil 120. Along the refrigerant flow direction in the coil 120, the second inlet 110 is located between the first inlet of the evaporator 100 and the outlet of the evaporator 100, and the length of the coil 120 between the second inlet 110 and the first inlet is equal to or greater than half the total length of the coil 120.

[0057] It is understandable that, along the refrigerant flow direction within the coil 120, the separated gaseous refrigerant is introduced into the coil 120 through the second inlet 110. On the one hand, this does not affect the heat exchange between the liquid refrigerant upstream of the second inlet 110 and the evaporator 100. On the other hand, the introduced gaseous refrigerant can also exchange heat with the evaporator 120. Furthermore, as the gaseous refrigerant flows into the return pipe 300, the pressure in the return pipe 300 increases, reducing the mechanical work consumed by the compressor in one suction and discharge process, thus improving the economy of the refrigeration system.

[0058] The coil 120 comprises multiple coil sections, which are arranged along a first direction and connected end-to-end. It is understood that, in the attached... Figure 3 In the middle, the inlet and the first outlet of the evaporator 100 are both located on the lower left side. Therefore, multiple coil sections are arranged in at least two rows in the front-to-back direction. The refrigerant enters the evaporator 100 from the capillary tube 200 and flows upward along the first direction through multiple coil sections. After reaching the top coil section, it enters another row of coil sections, then flows downward along the first direction through multiple coil sections, and is discharged into the return gas pipe 300 through the outlet of the evaporator 100.

[0059] In some embodiments, a portion of the capillary tube 200 is attached to the return pipe 300. In this way, the low-temperature refrigerant within the return pipe 300 cools the refrigerant in the capillary tube 200, lowering its temperature and increasing its subcooling, thereby improving the efficiency of the evaporator 100 and reducing energy consumption. Simultaneously, it also heats the refrigerant within the return pipe 300, increasing its superheat.

[0060] The method of attaching the capillary tube 200 and the return air tube 300 is not limited. For example, a portion of the capillary tube 200 can be extended parallel to the return air tube 300 and fixed by metal clamps, spring clips or plastic buckles.

[0061] In some embodiments, the second branch pipe 220 includes a first sub-pipe segment 221, which is attached to the return pipe 300 and extends along a spiral trajectory around the outer circumferential surface of the return pipe 300.

[0062] Understandably, by winding the first sub-pipe section 221 around the return pipe 300, the length of the second branch pipe 220 in contact with the return pipe 300 is increased. This increases the time for heat exchange with the return pipe 300, further reducing the temperature of the liquid refrigerant in the second branch pipe 220, thereby improving the efficiency of the subsequent evaporator 100 and reducing energy consumption. Furthermore, it increases the resistance to the flow of the liquid refrigerant, reducing its flow velocity, and consequently reducing the jetting and cavitation noise at the capillary tube 200 outlet, achieving further noise reduction.

[0063] In some embodiments, along the extension direction of the return pipe 300, the refrigerant flow direction in the capillary tube 200 is opposite to the refrigerant flow direction in the return pipe 300, so as to maximize the average temperature difference between the two and improve the heat exchange efficiency.

[0064] The second branch pipe 220 also includes a second sub-pipe section 222, which is attached to the return pipe 300 and extends axially along the return pipe 300. The first sub-pipe section 221 is located between the second sub-pipe section 222 and the evaporator 100. In other words, the portion of the second branch pipe 220 wrapped around the return pipe 300 is relatively closer to the evaporator 100. It is understood that the refrigerant temperature at the end of the return pipe 300 connected to the evaporator 100 is relatively low. Placing the portion of the second branch pipe 220 wrapped around the return pipe 300 at the aforementioned location can further reduce the subcooling of the internal refrigerant, thereby improving the efficiency of the evaporator 100.

[0065] In some specific embodiments, the second branch pipe 220 is spirally wound on the return pipe 300. Along the extension direction of the return pipe 300, the length of the spirally wound portion is not less than 20cm, and the pitch of the spirally wound portion is 2mm-10mm.

[0066] In some embodiments, a portion of the first branch pipe 210 is attached to the return pipe 300. It is understood that when refrigerant flows from the condenser to the first branch pipe 210, the refrigerant within the first branch pipe 210 may not be completely liquefied. By attaching at least a portion of the first branch pipe 210 to the return pipe 300, heat exchange can occur with the return pipe 300, reducing the temperature of the gas-liquid mixture of refrigerant within the first branch pipe 210. Furthermore, it allows the gaseous refrigerant in the gas-liquid mixture to liquefy, thereby increasing the amount of liquid refrigerant flowing into the second branch pipe 220 to ensure efficient heat exchange with the evaporator 100. Simultaneously, it reduces the amount of gaseous refrigerant directly discharged into the evaporator 100 through the second inlet 110, minimizing disturbance to the refrigerant flow within the evaporator 100.

[0067] In some embodiments, the refrigeration system includes a gas duct 500 that connects the outlet of the gas-liquid separator 400 to the second inlet 110 of the evaporator 100. The diameter of the gas duct 500 is not less than half the diameter of the coil of the evaporator 100, thereby reducing the flow resistance of the gaseous refrigerant from the outlet of the gas-liquid separator 400 to the evaporator 100, enabling the compressor to draw in a sufficient amount of refrigerant, improving efficiency, and also reducing the flow pressure of the gaseous refrigerant to reduce noise.

[0068] To further reduce noise, in some embodiments, a silencer 600 is provided on the gas duct 500. The gaseous refrigerant flows through the silencer 600 to attenuate noise. The silencer 600 is an expansion-type reactive silencer 600, which achieves sound wave reflection and interference attenuation through geometric design, and can also slow down the pressure and flow rate of the gaseous refrigerant.

[0069] In some embodiments, the return pipe 300 includes a plurality of straight pipe sections 310 arranged sequentially along a first direction and a curved pipe section 320 connecting adjacent straight pipe sections 310. It is understood that the curved pipe section 320 can absorb thermal expansion deformation through bending.

[0070] Regarding the specific structure of the return pipe 300, in some specific embodiments, among the multiple straight pipe sections 310, some straight pipe sections 310 extend along a second direction, and some straight pipe sections 310 extend along a third direction, wherein the second direction is perpendicular to the first direction, and the third direction intersects both the first and second directions. Each straight pipe section 310 extending along the third direction is located between two straight pipe sections 310 extending along the second direction, and its two ends are respectively connected to an adjacent straight pipe section 310 extending along the second direction through a curved pipe section 320, thereby forming a tortuous extension structure.

[0071] In some specific embodiments, regarding the connection structure between the capillary tube 200 and the gas-liquid separator 400, one end of the first branch pipe 210 is separated from the return pipe 300, and the separated end of the first branch pipe 210 is connected to the gas-liquid separator 400. The separation point of the first branch pipe 210 from the return pipe 300 is located on a straight section 310 or a curved section 320 at the middle position along the first direction. Similarly, one end of the second branch pipe 220 is separated from the return pipe 300, and the separated end of the second branch pipe 220 is connected to the gas-liquid separator 400. The separation point of the second branch pipe 220 from the return pipe 300 is located on a straight section 310 or a curved section 320 at the middle position along the first direction.

[0072] In some embodiments, the gas outlet of the gas-liquid separator 400 is located above the liquid outlet of the gas-liquid separator 400, so as to utilize the density difference between the gaseous refrigerant and the liquid refrigerant to achieve gas-liquid separation more effectively. In some embodiments, the inlet of the gas-liquid separator 400 is located above the liquid outlet of the gas-liquid separator 400. In some embodiments, the gas outlet of the gas-liquid separator 400 is located at the top of the gas-liquid separator, and the liquid outlet of the gas-liquid separator 400 is located at the bottom of the gas-liquid separator 400.

[0073] This application also provides a refrigeration device, including a refrigeration system and a cabinet. The cabinet has a storage space, and the refrigeration system cools the storage space. The refrigeration device can be a refrigerator, and the storage space can be at least one of the refrigerator's refrigerator compartment and freezer compartment.

[0074] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of the specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of protection.

Claims

1. A refrigeration system, characterized in that, The refrigeration system includes a compressor, a condenser, a capillary tube, and an evaporator, which are connected in sequence. The refrigeration system further includes a gas-liquid separator, and the capillary tube includes a first branch pipe and a second branch pipe. The first branch pipe connects the outlet of the condenser with the inlet of the gas-liquid separator, and the second branch pipe connects the liquid outlet of the gas-liquid separator with the first inlet of the evaporator. The evaporator also has a second inlet, and the outlet of the gas-liquid separator is connected to the second inlet.

2. The refrigeration system according to claim 1, characterized in that, The evaporator includes a coil, one end of which has a first inlet and the other end of which has an outlet. The second inlet is located in the coil along the refrigerant flow direction within the coil. The second inlet is situated between the first inlet and the outlet of the evaporator, and the length of the coil between the second inlet and the first inlet is equal to or greater than half the total length of the coil.

3. The refrigeration system according to claim 1, characterized in that, The refrigeration system includes a return pipe that connects the outlet of the evaporator to the inlet of the compressor, and a portion of the capillary tube is attached to the return pipe.

4. The refrigeration system according to claim 3, characterized in that, The second branch pipe includes a first sub-pipe section, which is attached to the return pipe and extends along a spiral trajectory around the outer circumference of the return pipe.

5. The refrigeration system according to claim 4, characterized in that, Along the extension direction of the return pipe, the refrigerant flow direction in the capillary tube is opposite to the refrigerant flow direction in the return pipe; The second branch pipe also includes a second sub-pipe section, which is attached to the return pipe and extends along the axial direction of the return pipe. The first sub-pipe section is located between the second sub-pipe section and the evaporator.

6. The refrigeration system according to claim 3, characterized in that, Part of the first branch pipe is attached to the return air pipe.

7. The refrigeration system according to claim 1, characterized in that, The evaporator includes a coil having the first inlet and the outlet of the evaporator; The refrigeration system includes a gas guide pipe that connects the outlet of the gas-liquid separator to the second inlet, wherein the diameter of the gas guide pipe is not less than half the diameter of the coil.

8. The refrigeration system according to claim 1, characterized in that, The refrigeration system includes a gas guide pipe, which connects the gas outlet of the gas-liquid separator to the second inlet, wherein a silencer is provided on the gas guide pipe.

9. The refrigeration system according to claim 1, characterized in that, The gas outlet of the gas-liquid separator is located above the liquid outlet of the gas-liquid separator; and / or, the inlet of the gas-liquid separator is located above the liquid outlet of the gas-liquid separator; and / or, the gas outlet of the gas-liquid separator is located at the top of the gas-liquid separator.

10. A refrigeration device, characterized in that: Includes the refrigeration system according to any one of claims 1 to 9.

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