Refrigeration system and refrigeration device

Abstract

The utility model discloses a refrigeration system and refrigeration equipment belong to the technical field of refrigeration device, and the refrigeration system includes evaporimeter, throttling part, transition pipe and rectifier ring, the transition pipe includes rectifying section and transition section who are connected with each other, and the inside diameter of rectifying section is greater than the inside diameter of transition section, rectifying section communicates with the inlet end of evaporimeter, and transition section communicates with throttling part, the rectifier ring is arranged in rectifying section, and the rectifier ring and the inner wall of transition pipe form rectification gap, fluid flows to transition section by throttling part and flows into the inlet end of evaporimeter through rectifying section, the rectifier ring and the inner wall of transition pipe form rectification gap, and the part of fluid flowing out of transition section and close to rectifying section inner wall is forced to pass through annular gap, the part speed of fluid through annular gap is accelerated, and then the ability of fluid to resist inverse pressure gradient is improved, to restrain the generation of backflow and vortex, and then reduce noise.

Description

Technical Field

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

[0002] In the refrigeration system of refrigeration equipment, capillary tubes are often used for throttling and pressure reduction of refrigerant. However, the refrigerant passing through the capillary tube is difficult to completely liquefy and is usually in a two-phase state of gas and liquid. The flow is unstable, the pressure pulsation is severe, and it is easy to generate vibration and thus noise. Utility Model Content

[0003] 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 that suppresses backflow and vortex generation, thereby reducing noise.

[0004] This utility model also provides a drawer assembly and a refrigeration device that utilize the above-mentioned exhaust structure.

[0005] The refrigeration system according to a first aspect embodiment of the present invention includes:

[0006] A refrigeration circuit includes a compressor, condenser, throttling device, and evaporator connected in series;

[0007] The transition tube includes a rectifier section and a transition section connected to each other, wherein the inner diameter of the rectifier section is larger than the inner diameter of the rectifier section; the rectifier section is connected to the inlet end of the evaporator, and the transition section is connected to the throttling component;

[0008] A rectifier ring is disposed within the rectifier section, and a rectifier gap is formed between the rectifier ring and the inner wall of the rectifier section.

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

[0010] The fluid flows from the throttling component to the transition section and then flows into the inlet of the evaporator through the rectifying section. A rectifying gap is formed between the rectifying ring and the inner wall of the transition tube. The part of the fluid flowing out of the transition section that is close to the inner wall of the rectifying section is forced to pass through the annular gap. The velocity of the part of the fluid passing through the annular gap is accelerated, thereby improving the fluid's ability to resist the reverse pressure gradient, suppressing backflow and vortex generation, and thus reducing noise.

[0011] According to some embodiments of the present invention, the width of the rectifier gap is greater than or equal to 0.01 times the inner diameter of the rectifier section, and less than 0.05 times the inner diameter of the transition section.

[0012] And / or, the length of the rectifier ring in the axial direction of the transition tube is greater than the inner diameter of the rectifier section, and less than or equal to twice the inner diameter of the rectifier ring.

[0013] According to some embodiments of the present invention, along the length direction of the transition tube, the minimum distance between the rectifier ring and the transition section is greater than or equal to the inner diameter of the rectifier section, and less than twice the inner diameter of the rectifier section.

[0014] According to some embodiments of this utility model, multiple rectifier sections and multiple rectifier rings are respectively provided, and multiple rectifier rings are provided in one-to-one correspondence with multiple rectifier sections; multiple rectifier sections are connected sequentially along the length direction of the transition tube; along the direction from the transition section to the rectifier section, the inner diameter of the rectifier section gradually increases.

[0015] According to some embodiments of the present invention, the refrigeration system further includes a noise reduction component, which is disposed within the rectifier section. The noise reduction component is provided with a plurality of noise reduction holes, which are arranged along the transition section toward the rectifier section. The rectifier ring and the noise reduction component are arranged sequentially along the transition section toward the rectifier section.

[0016] According to some embodiments of the present invention, the cross-sectional shape of the noise reduction hole is a regular polygon.

[0017] According to some embodiments of the present invention, multiple noise reduction holes are provided, and the contour edges of two adjacent noise reduction holes facing each other are arranged side by side.

[0018] According to some embodiments of the present invention, the cross-sectional area of ​​the end of the noise reduction component gradually decreases along the flow direction of the refrigerant.

[0019] According to some embodiments of the present invention, the outer periphery of the rectifier ring is provided with a plurality of connecting portions arranged at intervals, and the rectifier ring is connected to the transition tube through the connecting portions.

[0020] A refrigeration device according to a second aspect of the present invention includes a housing and a refrigeration system as described in any embodiment of the first aspect, wherein the refrigeration system is installed inside the housing.

[0021] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a refrigeration system according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram showing the cooperation relationship between the rectifier section and the rectifier ring of a refrigeration system according to an embodiment of this utility model;

[0024] Figure 3This is a schematic diagram of the structure of a noise reduction component in a refrigeration system according to an embodiment of the present invention;

[0025] Figure 4 This is another structural schematic diagram of the noise reduction component of the refrigeration system according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram showing the cooperation relationship between the rectifier section and the rectifier ring of a refrigeration system according to an embodiment of this utility model;

[0027] Figure 6 This is a schematic diagram of the refrigeration circuit of a refrigeration system according to an embodiment of the present invention.

[0028] Figure label:

[0029] Transition tube 100; Rectifier section 110; Transition section 120;

[0030] 200 rectifier ring; 210 rectifier gap; 220 connecting part;

[0031] Noise reduction component 300; noise reduction part 310; noise reduction hole 311; guide surface 320;

[0032] Compressor 410; Condenser 420; Throttling component 430; Evaporator 440. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "axial", "radial", "circumferential", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0036] In the description of this utility model, it should be noted that terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0037] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are some embodiments of this utility model, not all embodiments.

[0038] Reference Figure 1 , Figure 2 and Figure 6 As shown, the refrigeration system provided in the first aspect embodiment of this utility model includes a refrigeration circuit, a transition pipe 100, and a rectifier ring 200; the refrigeration circuit includes a compressor 410, a condenser 420, a throttling device 430, and an evaporator 440 connected to each other; the transition pipe 100 includes a rectifier section 110 and a transition section 120 connected to each other, the inner diameter of the rectifier section 110 is larger than the inner diameter of the transition section 120; the rectifier section 110 is connected to the inlet end of the evaporator 440, and the transition section 120 is connected to the throttling device 430; the rectifier ring 200 is disposed in the rectifier section 110, and a rectifier gap 210 is formed between the rectifier ring 200 and the inner wall of the transition pipe 100.

[0039] like Figure 6 As shown, the refrigerant flows into the throttling component 430 after passing through the compressor 410 and condenser 420. The fluid flows from the throttling component 430 to the transition section 120 and then flows into the inlet end of the evaporator 440 through the rectifier section 110. A rectifier gap 210 is formed between the rectifier ring 200 and the inner wall of the transition tube 100. The portion of the fluid flowing out of the transition section 120 that is close to the inner wall of the rectifier section 110 is forced to pass through the annular gap. The velocity of the fluid passing through the annular gap is accelerated, thereby improving the fluid's ability to resist the reverse pressure gradient, suppressing backflow and vortex generation, and thus reducing noise.

[0040] After being compressed by compressor 410, the refrigerant fluid experiences a rapid increase in temperature and pressure, forming a high-temperature, high-pressure gaseous refrigerant. This high-temperature, high-pressure gaseous refrigerant releases heat as it passes through condenser 420, forming a medium-temperature, high-pressure liquid refrigerant fluid. The refrigerant fluid flowing out of condenser 420 is depressurized by throttling device 430, forming a low-pressure, low-temperature refrigerant fluid. This low-pressure, low-temperature refrigerant fluid then enters evaporator 440 through temperature pipe 100 to absorb heat, achieving a cooling effect. After absorbing heat, the refrigerant fluid flows back into compressor 410 for the next cycle.

[0041] The inner diameter of the rectifier section 110 is larger than that of the transition section 120, causing the refrigerant to gradually expand within the transition pipe 100. Because the diameter difference between the throttling component 430 and the inlet end of the evaporator 440 is significant, directly connecting the throttling component 430 and the inlet end of the evaporator 440 would cause the refrigerant to be ejected instantaneously when entering the inlet end of the evaporator 440 from the throttling component 430, generating considerable noise. By connecting the throttling component 430 and the inlet end of the evaporator 440 through the transition pipe 100, the refrigerant enters the rectifier section 110 from the throttling component 430 via the transition section 120 and gradually expands, thus reducing the refrigerant ejection effect and consequently decreasing noise.

[0042] The region near the inner wall of the rectifying section 110 is the boundary layer region. The inner diameter of the rectifying section 110 is larger than that of the transition section 120. Fluid flowing out of the transition section 120 passes through this suddenly expanding region, causing a low-velocity flow to form in the boundary layer region. This low-velocity flow loses kinetic energy due to the adverse pressure gradient and cannot continue flowing along the wall, forming a separation zone. The low-velocity flow in the separation zone has low pressure, while the fluid downstream of the separation zone has higher pressure. This causes the fluid downstream of the separation zone to flow back upstream to the lower pressure, filling the separation zone and forming a backflow. At the boundary of the separation zone, a significant velocity difference exists between the high-speed mainstream fluid and the low-velocity fluid in the separation zone, forming a strong shear layer. This shear layer is unstable and can swirl to form vortices. These vortices are constantly generated and detached, consuming energy and causing vibration and noise.

[0043] In this embodiment of the invention, a rectifying ring 200 is disposed within a rectifying section, and a rectifying gap 210 is formed between the rectifying ring 200 and the inner wall of the transition pipe 100. The fluid portion near the inner wall of the rectifying section 110 is forced to pass through the annular gap and is accelerated, forming a high-speed flow. This high-speed flow directly injects into the low-speed flow in the boundary layer region, causing the fluid in the boundary layer region to flow a longer distance close to the wall surface. This improves the fluid's ability to resist the adverse pressure gradient in the boundary layer region, prevents flow separation, and thus suppresses backflow and vortex generation. By accelerating the fluid portion near the inner wall of the rectifying section 110 through the annular gap to form a high-speed flow, the radial velocity difference of the fluid is reduced, the velocity gradient is decreased, making the shear layer more stable and less prone to curling and instability, thereby suppressing the generation of large-scale vortices.

[0044] The throttling component 430 is typically a capillary tube. Due to the recent heat exchange, the flow pattern of the two-phase refrigerant at the capillary outlet is unstable, with severe pressure pulsations, generating vibrations and thus producing low-frequency refrigerant flow-induced noise. In this embodiment, a rectifier ring 200 is installed within the rectifier section 110. A rectifier gap 210 is formed between the rectifier ring 200 and the inner wall of the transition tube 100. The rectifier gap 210 causes the pressure in the boundary layer region to drop to negative. Under this negative pressure, the fluid continuously moves forward, suppressing backflow and vortex generation. Bubble flow produces less refrigerant noise than slug flow. This design reduces the possibility of small bubbles coalescing into large bubbles, preventing the refrigerant from transitioning from bubble flow to slug flow, thereby reducing noise. Simultaneously, the rectifier ring 200 increases the pressure in the boundary layer region, forcibly adjusting the fluid flow direction to axial flow, stabilizing the internal gas-liquid flow, making the refrigerant flow pattern closer to laminar flow, and further reducing refrigerant noise.

[0045] Reference Figure 2 As shown, in some embodiments, the width of the rectifying gap 210 is greater than or equal to 0.01 times the inner diameter of the rectifying section 110, and less than 0.05 times the inner diameter of the rectifying section 110. By limiting the width of the rectifying gap 210, the rectification effect is ensured. If the width of the rectifying gap 210 is too large, it will be affected by turbulence, and a separation zone will still form within the rectifying section 110, making it difficult to reduce backflow and vortices. If the width of the rectifying gap 210 is too small, it will easily increase the flow resistance within the rectifying section 110, causing new effects on the refrigerant flow within the transition pipe 100. Correspondingly, the inner diameter of the rectifying ring 200 is 0.8 to 0.9 times the inner diameter of the rectifying section 110.

[0046] In some embodiments, the length of the rectifier ring 200 in the axial direction of the transition tube 100 is greater than the inner diameter of the rectifier section 110 and less than or equal to twice the inner diameter of the rectifier ring 200. By limiting the length of the rectifier ring 200 in the axial direction of the transition tube 100, the rectification effect is ensured. If the length of the rectifier ring 200 is too small, it will be affected by turbulence, making it difficult to reduce backflow and vortices, and it is easy to cause local disturbances and generate secondary vortices. If the length of the rectifier ring 200 is too large, the rectification gap 210 will be too long, and the frictional resistance of the fluid in the rectification gap 210 will be greater, causing unnecessary energy loss. Moreover, if the rectification gap 210 is too long, it may cause the formation of an independent flow state in the rectification gap 210, which may easily generate new shear layers and instability.

[0047] In some embodiments, along the length of the transition tube 100, the minimum distance between the rectifier ring 200 and the transition section 120 is greater than or equal to the inner diameter of the rectifier section 110, and less than twice the inner diameter of the rectifier section 110, to ensure rectification effect. If the minimum distance between the rectifier ring 200 and the transition section 120 is greater than twice the inner diameter of the rectifier section 110, a blockage flow will be generated between the rectifier ring 200 and the transition section 120, and noise will be generated, affecting the noise reduction effect. If the minimum distance between the rectifier ring 200 and the transition section 120 is less than the inner diameter of the rectifier ring 200, the fluid flowing out of the transition section 120 has not completed its initial expansion, and the fluid in the boundary layer region is forcibly squeezed into the rectifier gap 210, resulting in increased energy loss of the fluid and a new impact on the refrigerant flow in the transition tube 100.

[0048] In some embodiments, a plurality of rectifier sections 110 are provided, and the plurality of rectifier sections 110 are connected sequentially along the length direction of the transition tube 100; the inner diameter of the rectifier section 110 gradually increases along the direction from the transition section 120 toward the rectifier section 110.

[0049] Understandably, the refrigerant fluid flowing out of the throttling component 430 flows into the inlet end of the evaporator 440 after passing through the transition section 120 and multiple rectifier sections 110 in sequence. Along the direction from the transition section 120 towards the rectifier section 110, the inner diameter of the rectifier section 110 gradually increases, causing the refrigerant fluid to gradually expand within the transition pipe 100, reducing the refrigerant injection effect and thus reducing noise. Since there is a large difference in pipe diameter between the throttling component 430 and the inlet end of the evaporator 440, the inner diameter of the rectifier section 110 can be gradually increased by connecting multiple rectifier sections 110 in sequence, thereby gradually increasing the flow area of ​​the transition pipe 100 and causing the refrigerant fluid to gradually expand.

[0050] Reference Figure 1 and Figure 2 As shown, in some embodiments, multiple rectifier rings 200 are provided, and multiple rectifier rings 200 are provided one-to-one with multiple rectifier sections 110. The rectifier rings 200 can suppress the backflow and vortex generation in the corresponding rectifier section 110, thereby reducing noise. By providing multiple rectifier rings 200, the overall noise of the transition tube 100 can be reduced.

[0051] In this embodiment, only one rectifier ring 200 is provided, while multiple transition sections 120 are provided. Along the length of the transition pipe 100, the multiple transition sections 120 are connected sequentially. Along the direction from the transition section 120 towards the rectifier section 110, the inner diameter of the transition section 120 gradually increases. The rectifier ring 200 is only provided within the rectifier section 110 to suppress backflow and vortex generation, thus stabilizing the internal gas-liquid flow. The rectifier ring 200 has the best rectification effect for medium-to-high flow velocity conditions, i.e., turbulent flow. Therefore, in this embodiment, the rectifier ring 200 is placed in the rectifier section 110 near the inlet end of the evaporator 440, where the refrigerant velocity is fastest, the turbulence intensity is greatest, and the fluid particle motion is disordered, allowing the rectifier ring 200 to more effectively function, dividing large-scale eddies and reducing turbulence intensity. A noise reduction component 300 is installed in the rectifier section 110, which is far away from the transition section 120, to further stabilize the flow pattern, dissipate sound wave energy, and reduce the pressure pulsation noise caused by turbulence and the eddy separation noise caused by sudden changes in flow velocity.

[0052] Reference Figure 1 and Figure 3 As shown, in some embodiments, the refrigeration system further includes a noise reduction component 300, which is disposed within the rectifier section 110. The noise reduction component 300 is provided with a plurality of noise reduction holes 311, which are disposed along the transition section 120 toward the rectifier section 110. The rectifier ring 200 and the noise reduction component 300 are arranged sequentially along the transition section 120 toward the rectifier section 110.

[0053] The noise reduction holes 311 are arranged along the transition section 120 toward the rectifier section 110. When the refrigerant fluid in the rectifier section 110 passes through the noise reduction component 300, the fluid passes through multiple noise reduction holes 311, and large bubbles are cut into small bubbles. Through multiple noise reduction holes 311, sound wave energy is dissipated, large bubbles are divided, the flow pattern is made closer to bubbly flow, pressure pulsation is reduced, and the noise in the refrigeration system of the refrigeration equipment is reduced.

[0054] Due to abrupt changes in refrigerant velocity at the capillary outlet of the refrigeration equipment, the flow pattern becomes unstable, easily causing pressure pulsation noise and vortex separation noise. This embodiment of the invention addresses this by incorporating a rectifier ring 200 to suppress backflow and vortex generation, thereby stabilizing the internal gas-liquid flow and making the refrigerant flow pattern closer to laminar flow. The rectifier ring 200 and the noise reduction component 300 are arranged sequentially along the transition section 120 towards the rectifier section 110. In other words, the noise reduction component 300 is located downstream of the rectifier ring 200, dissipating sound wave energy through multiple noise reduction holes 311 and breaking up large bubbles, thus making the flow pattern closer to bubbly flow.

[0055] Reference Figure 1 and Figure 3As shown, in some embodiments, the cross-sectional shape of the noise reduction hole 311 is a regular polygon. When the fluid passes through the noise reduction hole 311, the large bubbles in the fluid come into contact with the sharp corners or edges of the noise reduction hole 311, generating high local stress. This causes the bubble film of the large bubble to puncture or tear at the contact point, thereby cutting the large bubble into multiple small bubbles. The circular hole only has smooth and continuous edges. If the noise reduction hole 311 is a circular hole, when the fluid passes through the noise reduction hole 311, the large bubble will not be cut immediately, but will deform and pass through the noise reduction hole 311, making it difficult to directly tear the bubble. Compared with a circular hole, a regular polygon has a longer perimeter in the same area, which increases the shearing force of the noise reduction hole 311 on the large bubble, so as to cut the large bubble into multiple small bubbles and make the flow pattern closer to a bubble flow.

[0056] Reference Figure 1 and Figure 3 As shown, in some embodiments, the cross-sectional shape of the noise reduction hole 311 is a regular hexagon. The regular hexagonal shape can more evenly transfer the load to the entire structure, has higher bending and compressive strength, and has high local shear stress, which is beneficial for cutting large bubbles. If the cross-sectional shape of the noise reduction hole 311 is an equilateral triangle, the bubbles will be over-cut, generating micron-sized bubbles, which in turn will generate large-scale eddies, affecting the noise reduction effect. Moreover, the acute angle area of ​​the noise reduction hole 311 with an equilateral triangle cross-section is prone to trapping impurities, causing... The noise reduction orifice 311 has a regular hexagonal cross-sectional shape, which can moderately shear large bubbles, dividing them into millimeter-sized uniform small bubbles to form a bubble flow and avoid excessive breakage. The interior angle of the regular hexagon is 120°, with no sharp dead corners, making it difficult for impurities to be trapped, reducing flow separation, and resulting in a more uniform flow velocity distribution. The orifice diameter of the noise reduction orifice 311 is 0.02 to 0.04 times the inner diameter of the rectifying section 110. For example, when the orifice diameter of the rectifying section 110 is 20 mm, the inner diameter of the pore can be set to 600 μm. If the orifice diameter of the noise reduction orifice 311 is too large, it will affect the noise reduction effect. If the orifice diameter of the noise reduction orifice 311 is too small, the resistance of the refrigerant fluid passing through the noise reduction orifice 311 will increase sharply. The orifice diameter of the noise reduction orifice 311 is the maximum width of the noise reduction orifice 311 in the radial direction of the transition pipe 100.

[0057] Reference Figure 1 and Figure 3As shown, in some embodiments, multiple noise reduction holes 311 are provided, and the contour edges of two adjacent noise reduction holes 311 are arranged side by side to minimize the gap between two adjacent noise reduction holes 311, thereby increasing the effective flow area of ​​the noise reduction component 300 and reducing the flow resistance of the fluid. In this embodiment, the cross-sectional shape of the noise reduction hole 311 is a regular hexagon, and the regular hexagonal noise reduction hole 311 has six contour edges. That is, there are six noise reduction holes 311 on the outer periphery of one noise reduction hole 311. The contour edges of two adjacent noise reduction holes 311 are arranged side by side, and the opening rate reaches more than 90%, which can effectively improve the utilization rate of the noise reduction hole 311, thereby dispersing the original plug flow large bubbles into multiple small bubbles, that is, changing from plug flow to bubble flow, making the flow more uniform. The regular hexagon has the best close-packed structure in nature, and a 120° support angle is formed between adjacent gaps. The compressive strength is 15% higher than that of circular gaps, which can avoid structural deformation caused by long-term refrigerant high-pressure pulsation. This design guides the fluid to flow directionally along the orifice wall, reduces random turbulent vortices, generates microscale vortices at sharp corners, and accelerates the shearing and breaking up of large bubbles.

[0058] Reference Figure 1 and Figure 3 As shown, in some embodiments, a noise reduction part 310 is provided on the noise reduction component 300, a noise reduction hole 311 is located on the noise reduction part 310, and the noise reduction part 310 is a regular hexagon; the regular hexagon has a high moment of inertia and strong compressive strength, which can maximize the structural strength of the noise reduction component 300.

[0059] Reference Figure 3 and Figure 4 As shown, in some embodiments, the cross-sectional area of ​​the end of the noise reduction component 300 gradually decreases along the refrigerant flow direction, so that the end of the noise reduction component 300 is positioned as far away from the inner wall of the rectifying section 110 as possible. This allows the refrigerant fluid flowing out of the noise reduction holes 311 to converge towards the central axis of the rectifying section 110, reducing the contact between the refrigerant fluid and the inner wall of the rectifying section 110, which is more conducive to stabilizing the refrigerant flow pattern and reducing the generation of vortices. Furthermore, the gradual movement of the end of the noise reduction component 300 away from the inner wall of the rectifying section 110 along the refrigerant flow direction allows sufficient space for the fluid in the noise reduction holes 311 located around the noise reduction component 300 to diffuse after flowing out of the noise reduction holes 311, preventing the refrigerant fluid from being forced to contact the inner wall of the rectifying section 110 and causing problems such as refrigerant flow pattern turbulence. This configuration results in the end of the noise reduction component 300 forming a cone shape, and the surface of the end of the noise reduction component 300 forming an arc-shaped guide surface 320.

[0060] Reference Figure 5As shown, in some embodiments, the outer periphery of the rectifier ring 200 is provided with a plurality of connecting portions 220 arranged at intervals. The rectifier ring 200 is connected to the transition tube 100 through the connecting portions 220, thereby installing the rectifier ring 200 inside the transition tube 100. The connecting portions 220 are arranged at intervals to avoid blocking the rectifier gap 210. In this embodiment, there are two connecting portions 220, and the two connecting portions 220 are arranged symmetrically, so that the rectifier ring 200 is stably installed inside the transition tube 100. Of course, the number and distribution of the connecting portions 220 can be set according to actual needs, and this utility model embodiment does not make any special limitation on this. The connecting portions 220 can be fixed to the rectifier section 110 by spot welding.

[0061] A refrigeration device according to a second aspect of the present invention includes a housing and a refrigeration system according to any embodiment of the first aspect, wherein the refrigeration system is installed inside the housing.

[0062] It is understood that the refrigeration equipment can be refrigerators, freezers, or other devices with refrigeration functions. If the refrigeration system has the beneficial effects of the above embodiments, then the refrigeration equipment will have the beneficial effects of the above embodiments accordingly. The specific implementation method can be referred to the above embodiments, and will not be repeated in this application.

[0063] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A refrigeration system, characterized in that, include: A refrigeration circuit includes a compressor, condenser, throttling device, and evaporator connected in series; The transition tube includes a rectifier section and a transition section connected to each other, wherein the inner diameter of the rectifier section is larger than the inner diameter of the transition section; the rectifier section is connected to the inlet end of the evaporator, and the transition section is connected to the throttling component; A rectifier ring is disposed within the rectifier section, and a rectifier gap is formed between the rectifier ring and the inner wall of the rectifier section.

2. The refrigeration system according to claim 1, characterized in that, The width of the rectifier gap is greater than or equal to 0.01 times the inner diameter of the rectifier section, and less than 0.05 times the inner diameter of the rectifier section. And / or, the length of the rectifier ring in the axial direction of the transition tube is greater than the inner diameter of the rectifier section, and less than or equal to twice the inner diameter of the rectifier ring.

3. The refrigeration system according to claim 1, characterized in that, Along the length of the transition tube, the minimum distance between the rectifier ring and the transition section is greater than or equal to the inner diameter of the rectifier section, and less than twice the inner diameter of the rectifier section.

4. The refrigeration system according to claim 1, characterized in that, Multiple rectifier sections and multiple rectifier rings are provided, and multiple rectifier rings are provided in one-to-one correspondence with multiple rectifier sections; multiple rectifier sections are connected sequentially along the length direction of the transition tube; along the direction from the transition section to the rectifier section, the inner diameter of the rectifier section gradually increases.

5. The refrigeration system according to any one of claims 1 to 4, characterized in that, The refrigeration system also includes a noise reduction component, which is disposed within the rectifier section. The noise reduction component has multiple noise reduction holes, which are arranged along the transition section toward the rectifier section. The rectifier ring and the noise reduction component are arranged sequentially along the transition section toward the rectifier section.

6. The refrigeration system according to claim 5, characterized in that, The cross-sectional shape of the noise reduction aperture is a regular polygon.

7. The refrigeration system according to claim 6, characterized in that, The noise reduction holes are provided in multiple ways, and the contour edges of two adjacent noise reduction holes are arranged side by side facing each other.

8. The refrigeration system according to claim 5, characterized in that, Along the flow direction of the refrigerant, the cross-sectional area of ​​the end of the noise reduction component gradually decreases.

9. The refrigeration system according to any one of claims 1 to 4, characterized in that, The rectifier ring has multiple connecting parts arranged at intervals on its outer periphery, and the rectifier ring is connected to the transition tube through the connecting parts.

10. A refrigeration device, characterized in that, It includes a housing and a refrigeration system as described in any one of claims 1 to 9, wherein the refrigeration system is installed within the housing.

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