Throttling structure, refrigeration system and refrigeration equipment

Abstract

This utility model discloses a throttling structure, a refrigeration system, and refrigeration equipment, belonging to the field of household appliance technology. The throttling structure includes a first throttling tube, an expansion tube, a second throttling tube, and a packing element. The first throttling tube connects to the condenser; the inlet of the expansion tube connects to the outlet of the first throttling tube, and the inner diameter of the expansion tube is larger than that of the first throttling tube; the inlet of the second throttling tube connects to the outlet of the expansion tube, and the outlet of the second throttling tube connects to the evaporator, and the inner diameter of the second throttling tube is smaller than that of the expansion tube; the packing element is made of a porous material and is disposed inside the expansion tube, configured to allow refrigerant flowing from the first throttling tube to pass through and flow to the second throttling tube. This utility model reconstructs the gas-liquid two-phase flow through the packing element, promoting uniform mixing of the gas and liquid phases, transforming the violent and concentrated flash evaporation process into a smooth and controllable phase change process within the packing element, thereby suppressing noise generation.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a throttling structure, a refrigeration system and a refrigeration device. Background Technology

[0002] Throttling elements are crucial components in refrigeration systems, used to reduce the pressure of refrigerant from the condenser. Capillary tubes, a commonly used throttling element, often cause significant noise problems during operation. When refrigerant flows through the end of the capillary tube, the sudden pressure drop causes violent boiling, forming an unstable two-phase flow that produces loud jetting and cavitation noises. To address this, related technologies often employ locally reduced tube diameters to lower noise; however, this increases refrigerant flow resistance, leading to a decline in the overall performance of the refrigeration system. 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 throttling structure that can effectively suppress noise generation at the outlet of the throttling structure without increasing the flow resistance of the refrigerant.

[0004] This utility model also proposes a refrigeration device that includes the above-mentioned throttling structure.

[0005] A throttling structure according to a first aspect of the present invention includes: a first throttling tube, an expansion tube, a second throttling tube, and a filler. The first throttling tube is used to connect to the condenser. The inlet of the expansion tube is connected to the outlet of the first throttling tube, and the inner diameter of the expansion tube is larger than the inner diameter of the first throttling tube. The inlet of the second throttling tube is connected to the outlet of the expansion tube, and the outlet of the second throttling tube is used to connect to the evaporator. The inner diameter of the second throttling tube is smaller than the inner diameter of the expansion tube. The filler is made of a porous material and is disposed inside the expansion tube. The filler is configured to allow refrigerant flowing out of the first throttling tube to pass through and flow to the second throttling tube.

[0006] The throttling structure according to the embodiments of this utility model has at least the following beneficial effects: The throttling structure of this utility model embodiment uses an expansion tube between the first and second throttling tubes, wherein the inner diameter of the expansion tube is larger than that of the first throttling tube. This decelerates and diffuses the high-speed refrigerant from the first throttling tube, providing a stable refrigerant state for subsequent processing. Furthermore, by placing a packing element inside the expansion tube, made of a porous material, the small channels within the packing element reconstruct the gas-liquid two-phase flow as the refrigerant flowing from the first throttling tube passes through the packing element and flows to the second throttling tube. This reconstructs the gas-liquid two-phase flow, breaking down and refining the large bubbles generated by flash evaporation, promoting uniform mixing of the gas and liquid phases. This transforms the intense and concentrated flash evaporation process at the outlet of a traditional throttling element into a smooth and controllable phase change process within the packing element, effectively suppressing noise generation. In addition, the flow state of the refrigerant after passing through the throttling structure is more stable, which is beneficial for sufficient heat exchange in the evaporator, thereby improving the heat exchange efficiency of the evaporator.

[0007] According to some embodiments of the present invention, the filler and the inlet of the expansion tube are spaced apart along the axial direction of the expansion tube, and the distance between the end face of the filler near the inlet of the expansion tube and the outlet of the first throttling tube is e, which satisfies: 0mm < e ≤ 5mm.

[0008] According to some embodiments of this utility model, the length of the filler along the axial direction of the expansion tube is c, which satisfies: 15mm≤c≤25mm. According to some embodiments of this utility model, the porosity P of the filler satisfies: 45% ≤ P ≤ 60%.

[0009] According to some embodiments of this utility model, the expansion tube and the first throttling tube are coaxially arranged, the inner diameter of the expansion tube is f, and the inner diameter of the first throttling tube is g, satisfying: 1.3≤f / g≤3.

[0010] According to some embodiments of the present invention, the second throttling tube is sealed to the expansion tube, and at least a portion of the end face of the inlet of the second throttling tube abuts against the filler to restrict the filler from moving into the interior of the second throttling tube.

[0011] According to some embodiments of the present invention, the throttling structure further includes a connecting pipe, one end of which is connected to the outlet of the second throttling pipe and the other end of which is connected to the evaporator. The connecting pipe includes multiple pipe segments arranged coaxially. Along the axial direction of the connecting pipe, the multiple pipe segments are arranged sequentially, and the inner diameter of the previous pipe segment is smaller than the inner diameter of the next pipe segment.

[0012] According to some embodiments of this utility model, the filler is a porous metal part.

[0013] The refrigeration system according to a second aspect embodiment of the present invention includes the throttling structure described in the first aspect embodiment.

[0014] The refrigeration system according to the embodiments of this utility model has at least the following beneficial effects: The refrigeration system of this utility model adopts the throttling structure of the first aspect embodiment. By transforming the violent and concentrated flash evaporation process at the outlet of the traditional throttling element into a smooth and controllable phase change process inside the packing, the generation of noise is effectively suppressed. This not only reduces the operating noise of the refrigeration system but also improves the refrigeration efficiency of the refrigeration system, thereby improving the energy efficiency ratio of the refrigeration system.

[0015] The refrigeration device according to a third aspect embodiment of the present invention includes the refrigeration system described in the second aspect embodiment.

[0016] The refrigeration device according to the embodiments of this utility model has at least the following beneficial effects: The refrigeration equipment of this utility model adopts the refrigeration system of the second aspect embodiment. By optimizing the structural design of the throttling structure, it can not only suppress the noise generation of the refrigeration equipment and improve the quietness of the refrigeration equipment, but also improve the refrigeration performance of the refrigeration equipment, reduce the energy consumption of the refrigeration equipment, and improve the user experience.

[0017] 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

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the throttling structure according to an embodiment of the present invention; Figure 2 This is a side view of a throttling structure according to an embodiment of the present invention; Figure 3 for Figure 2 A cross-sectional view along the AA direction; Figure 4 for Figure 3 A magnified view of a section at point B in the middle; Figure 5 This is a partial schematic diagram of a refrigeration system according to an embodiment of the present invention.

[0019] Icon labels: Throttling structure 1000; condenser 2000; evaporator 3000; First throttling tube 100; Expansion tube 200; cavity 210; Second throttling tube 300; Filler 400; Connecting pipe 500; first pipe section 510; second pipe section 520; third pipe section 530. Detailed Implementation

[0020] 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.

[0021] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are 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.

[0022] 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.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" 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.

[0024] It should be noted that when the high-temperature, high-pressure liquid refrigerant flows out of the end of the capillary tube and enters the larger-diameter evaporator inlet pipe, its pressure drops sharply, causing the liquid refrigerant to boil violently, i.e., flash evaporation, thus forming a gas-liquid two-phase flow. During flash evaporation, a large number of large bubbles are formed. These bubbles undergo rapid movement and violent deformation until they finally burst, producing ejection sounds and cavitation sounds during this process.

[0025] Furthermore, after the refrigerant is ejected at high speed from the end of the capillary tube, a complex trailing vortex and a local low-pressure area will form at its tail, which will trigger a secondary cavitation effect, further increasing the proportion of the refrigerant in the gas phase, i.e., increasing the dryness, making its flow pattern more turbulent, thus aggravating the noise problem.

[0026] Related technologies reduce noise by altering the pipe structure at the throttling end, such as by locally reducing the diameter of the capillary tube to refine the air bubbles. However, this method increases the flow resistance of the refrigerant, which not only affects the refrigerant circulation flow rate and leads to a decrease in the overall performance of the refrigeration system, but also reduces the strength of the capillary tube, thus shortening its strength and lifespan.

[0027] To address the aforementioned problems, some embodiments of this utility model propose a throttling structure 1000, suitable for refrigeration systems in refrigeration equipment. This structure effectively suppresses noise generation at the outlet of the throttling structure 1000 without increasing the flow resistance of the refrigerant. See details below. Figures 1 to 4 The diagram illustrates the throttling structure 1000.

[0028] In this embodiment of the invention, the refrigeration system can be a refrigeration circuit for refrigeration equipment such as refrigerators, air conditioners, and freezers. The refrigeration system includes a compressor, a condenser 2000, an evaporator 3000, and a throttling structure 1000. These components are connected in one loop via piping to form a complete refrigeration cycle. During operation, low-pressure gaseous refrigerant from the evaporator 3000 is drawn into the compressor and compressed into a high-temperature, high-pressure gas, which then enters the condenser 2000. Inside the condenser 2000, the high-temperature, high-pressure gaseous refrigerant dissipates heat to the external environment and condenses into a high-pressure liquid refrigerant. Subsequently, the high-pressure liquid refrigerant flows into the throttling structure 1000, where it is throttled and depressurized to become a low-temperature, low-pressure gas-liquid two-phase mixture, which finally enters the evaporator 3000. Inside the evaporator 3000, the low-temperature, low-pressure refrigerant absorbs heat and evaporates, thereby achieving refrigeration. Reference Figure 1 , Figure 2 and Figure 3 As shown in this embodiment of the invention, the throttling structure 1000 includes: a first throttling pipe 100, an expansion pipe 200, a second throttling pipe 300, and a filler 400. The first throttling pipe 100 is used to connect to the condenser 2000. Specifically, the inlet of the first throttling pipe 100 is connected to the outlet pipe of the condenser 2000. It can itself be a section of metal pipe with a small inner diameter, such as a copper or aluminum pipe, thereby playing a preliminary throttling and pressure-reducing role. When the high-pressure liquid refrigerant from the condenser 2000 flows through the first throttling pipe 100, its pressure will decrease to a certain extent.

[0029] Continue to refer to Figure 1 , Figure 2 and Figure 3As shown, in this embodiment of the invention, the inlet of the expansion tube 200 is connected to the outlet of the first throttling tube 100, wherein the inner diameter of the expansion tube 200 is larger than the inner diameter of the first throttling tube 100. Based on this, the cross-sectional area of ​​the expansion tube 200 is larger than that of the first throttling tube 100. Therefore, when the refrigerant flows through the inlet of the expansion tube 200, this sudden increase in cross-sectional area causes the refrigerant flowing out of the first throttling tube 100 at high speed to experience a sharp drop in velocity and a slight increase in pressure, thereby stabilizing the refrigerant's state and providing favorable conditions for subsequent processing.

[0030] Continue to refer to Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment of the present invention, the inlet of the second throttling pipe 300 is connected to the outlet of the expansion pipe 200, and the outlet of the second throttling pipe 300 is used to connect to the inlet pipe of the evaporator 3000. The inner diameter of the second throttling pipe 300 is smaller than the inner diameter of the expansion pipe 200, so that it can realize the final throttling and pressure reduction step of the throttling structure 1000 to ensure that the refrigerant has a pressure that meets the evaporation requirements.

[0031] It is understood that in this embodiment of the invention, the filler 400 is made of a porous material. In this embodiment, the porous material can be a porous ceramic, a porous polymer, a porous foam metal, or other material that does not react with the refrigerant and has sufficient compressive strength. Preferably, in this embodiment, the filler 400 is made of porous foam metal and assembled into the expansion tube 200 after laser cutting.

[0032] Reference Figure 3 As shown, in this embodiment of the invention, the filler 400 is configured to allow refrigerant flowing from the first throttling tube 100 to pass through and flow to the second throttling tube 300. Specifically, the filler 400 fills a certain axial section of the expansion tube 200, so that the refrigerant flowing from the first throttling tube 100 can only reach the second throttling tube 300 after passing through the filler 400. During the process of the refrigerant passing through the interior of the filler 400, the refrigerant is forced to flow into countless tortuous microchannels in the porous material.

[0033] On the one hand, the initially formed large bubbles are subjected to intense shearing and stretching as they pass through these narrow and irregular channels, thus being continuously broken down into smaller bubbles. The droplets are dispersed into even finer particles, making the refrigerant flow smoother and eliminating the conditions that generate eddy noise. Furthermore, the fluid flows out of the throttling structure 1000 in a continuous and stable manner, rather than in intermittent, impulsive jets, which significantly suppresses jet noise. On the other hand, the constraint and guiding effects promote uniform mixing of the gas and liquid phases and disperse the violent flash evaporation process into a smooth phase transition, thereby greatly reducing the noise of cavitation sounds.

[0034] Understandably, the refrigerant flowing out of the expansion tube 200 is transformed into a more uniform and stable gas-liquid two-phase flow by the rectification effect of the filler 400. When the refrigerant in this state enters the second throttling tube 300 for final throttling and pressure reduction and flows out from the end of the throttling structure 1000, it will not undergo violent boiling due to the stable flow state, thereby suppressing the generation of noise.

[0035] The throttling structure 1000 of this utility model embodiment provides an expansion tube 200 between the first throttling tube 100 and the second throttling tube 300. The inner diameter of the expansion tube 200 is larger than the inner diameter of the first throttling tube 100, thereby slowing down and diffuses the high-speed refrigerant from the first throttling tube 100, providing a stable refrigerant state for subsequent processing. Furthermore, a filler 400 made of porous material is provided inside the expansion tube 200. The refrigerant flowing out of the first throttling tube 100 passes through the filler 400 and flows to the second throttling tube 300. During the process of 00, the small channels inside the packing 400 can reconstruct the gas-liquid two-phase flow, break down and refine the large bubbles generated by flash evaporation, and promote uniform mixing of the gas and liquid phases. This transforms the violent and concentrated flash evaporation process at the outlet of the traditional throttling element into a smooth and controllable phase change process inside the packing 400, thereby effectively suppressing noise generation. In addition, it makes the flow state of the refrigerant after passing through the throttling structure 1000 more stable, which is conducive to the full heat exchange of the evaporator 3000, thereby improving the heat exchange efficiency of the evaporator 3000.

[0036] It is important to emphasize that, unlike related technologies that achieve localized noise reduction at the expense of performance, this embodiment of the invention effectively suppresses noise generation at the outlet of the throttling structure 1000 without increasing the flow resistance of the refrigerant. While achieving a more thorough noise reduction effect, it overcomes the performance degradation caused by increased flow resistance in related technologies.

[0037] Reference Figure 3 and Figure 4 As shown, in this embodiment of the present invention, the filler 400 is a columnar structure that matches the inner cavity of the expansion tube 200, wherein the outer peripheral wall of the filler 400 is sealed to the inner wall of the expansion tube 200. Specifically, the sealed connection between the two can be achieved by an interference fit between the filler 400 and the expansion tube 200, or by applying sealant to the outer periphery of the filler 400. It is understood that the sealed connection between the outer peripheral wall of the filler 400 and the inner wall of the expansion tube 200 can prevent some refrigerant from bypassing the filler 400 and flowing through the gap between its outer wall and the inner wall of the expansion tube 200, thereby reducing the risk of noise at the end of the throttling structure 1000 due to some refrigerant not flowing through the filler 400.

[0038] Reference Figure 4 As shown, in this embodiment of the invention, the length of the filler 400 along the axial direction of the expansion tube 200 is c, satisfying: 15mm ≤ c ≤ 25mm. For example, c can take values ​​of 15mm, 16mm, 18mm, 18.5mm, 20.5mm, 24mm, 25mm, etc. The inventors' experiments revealed that if c is less than 15mm, the refrigerant flow time within the filler 400 is too short, the rectification effect distance is too short, and the aforementioned crushing and mixing processes are insufficient, resulting in unsatisfactory noise reduction. Conversely, if c is greater than 25mm, although the regulation effect on the refrigerant flow state is stronger, the resulting flow resistance will also increase significantly. Therefore, this embodiment of the invention, by reasonably limiting the range of c, ensures the refrigerant rectification effect while controlling the flow resistance within a suitable range, thereby achieving a balance between noise reduction performance and energy efficiency ratio.

[0039] Reference Figure 3 As shown, in this embodiment of the invention, the axial length of the expansion tube 200 is d, satisfying: 0.6 ≤ c / d ≤ 1. It can be understood that the axial length of the expansion tube 200 directly affects the flow time and pressure distribution of the refrigerant within the expansion tube 200. Furthermore, this embodiment of the invention ensures that the filler 400 occupies the majority of the space within the expansion tube 200 by reasonably limiting the ratio of the length of the filler 400 to the axial length of the expansion tube 200.

[0040] Specifically, when the ratio of the length of the filler 400 to the length of the expansion tube 200 is controlled within the range of 0.6 to 1, the porous material can fully occupy the effective working area of ​​the expansion tube 200. In other words, during the refrigerant flow through the expansion tube 200, the porous material maintains sufficient axial extension to complete the full division and reorganization of the gas-liquid two-phase flow, while avoiding poor noise reduction effect due to the filler 400 being too short. Reference Figure 3 and Figure 4 As shown in this embodiment of the invention, the inlet of the filler 400 and the expansion tube 200 are spaced apart along the axial direction of the expansion tube 200. In other words, the filler 400 is not arranged tightly against the inlet of the expansion tube 200. Therefore, a cavity 210 is defined between the filler 400 and the inlet of the expansion tube 200. The cavity 210 can provide a flow buffer area for the refrigerant after it flows out of the first throttling tube 100, ensuring that the expansion tube 200 has adequate space for the refrigerant to complete preliminary diffusion before entering the porous material, thus avoiding the refrigerant directly impacting the surface of the filler 400 at high speed. At the same time, it avoids the local scouring or uneven flow that may be caused by the high-speed refrigerant directly impacting the central area of ​​the filler 400, thereby improving the overall working efficiency of the filler 400.

[0041] Reference Figure 4As shown, in this embodiment of the present invention, the distance e between the end face of the filler 400 near the inlet of the expansion tube 200 and the outlet of the first throttling tube 100 satisfies: 0mm < e ≤ 5mm, for example: e can take values ​​of 5mm, 4mm, 4.2mm, 3.5mm, 3mm, 2mm, 1mm, etc. It can be understood that by reasonably limiting the range of e, this embodiment of the present invention ensures that the refrigerant completes preliminary diffusion before entering the filler 400, while avoiding the premature rupture of large air bubbles in the cavity 210 due to an excessively large gap between the filler 400 and the inlet of the expansion tube 200, which would cause cavitation noise.

[0042] In this embodiment of the invention, the porosity P of the filler 400 satisfies: 45% ≤ P ≤ 60%. It should be noted that porosity refers to the proportion of pore volume within a porous material to its total volume. Experiments conducted by the inventors have shown that when P is below 45%, the porous material becomes too dense, with excessively narrow pores, resulting in excessive obstruction of the refrigerant flow and subsequent refrigerant pressure loss. When P is above 60%, the porous material becomes too porous, with relatively large pores, significantly weakening its ability to break up large bubbles and stabilize flow, thus reducing noise reduction. Therefore, this embodiment of the invention, by reasonably limiting the range of P, ensures uniform gas-liquid mixing while maintaining a reasonable resistance level.

[0043] Reference Figure 4 As shown, in this embodiment of the invention, the expansion tube 200 and the first throttling tube 100 are coaxially arranged. In this embodiment, the central axes of the first throttling tube 100, the expansion tube 200, and the second throttling tube 300 coincide, ensuring that the flow direction of the refrigerant does not deflect. In this embodiment, the inner diameter of the expansion tube 200 is f, and the inner diameter of the first throttling tube 100 is g, satisfying: 1.3≤f / g≤3. The inventors' experiments revealed that when f / g is less than 1.3, the expansion effect of the expansion tube 200 is not significant, insufficient to provide effective buffering for flash evaporation, and the noise reduction effect is limited. When f / g is greater than 3, excessive sudden expansion can easily cause fluid separation at the corners of the tube wall, forming a backflow zone and vortices, resulting in additional noise generation. Therefore, this embodiment of the invention ensures the stability of refrigerant flow and precisely controls pressure changes by reasonably limiting the range of f / g.

[0044] Reference Figure 4As shown, in this embodiment of the invention, the second throttling tube 300 and the expansion tube 200 are sealed together. In one example, the second throttling tube 300 and the expansion tube 200 are connected by welding, thereby achieving a fluid seal between the second throttling tube 300 and the expansion tube 200. In this embodiment, at least a portion of the end face of the second throttling tube 300 near the expansion tube 200 abuts against the filler 400, that is, the filler 400 is blocked by at least a portion of the end face of the inlet of the second throttling tube 300, thereby restricting the filler 400 from moving into the interior of the second throttling tube 300.

[0045] Specifically, when the refrigerant flows through the filler 400, the porous material vibrates due to the dynamic impact of the gas-liquid two-phase flow. If the filler 400 is not constrained, it may gradually shift into the second expansion tube 300 along the refrigerant flow direction. By sealing the second expansion tube 300 with the expansion tube 200 and providing an abutment structure at their junction that contacts the filler 400, the axial displacement of the filler 400 is mechanically limited, thereby maintaining its fixed position within the expansion tube 200. This ensures that the filler 400 is always within the predetermined area within the expansion tube 200, thus guaranteeing that the uniformity of the gas-liquid two-phase mixing when the refrigerant flows through the filler 400 is not affected by the displacement of the filler 400.

[0046] Reference Figure 1 , Figure 2 and Figure 3 As shown in this embodiment of the utility model, the throttling structure 1000 further includes a connecting pipe 500. One end of the connecting pipe 500 is connected to the outlet of the second throttling pipe 300, and the other end is connected to the evaporator 3000. The connecting pipe 500 includes multiple pipe segments arranged coaxially. Along the axial direction of the connecting pipe 500, the multiple pipe segments are arranged sequentially, and the inner diameter of the previous pipe segment is smaller than the inner diameter of the next pipe segment.

[0047] In one example, the connecting pipe 500 includes a first pipe section 510, a second pipe section 520, and a third pipe section 530 arranged coaxially, sequentially along the refrigerant flow direction. The inner diameter of the third pipe section 530 is larger than that of the second pipe section 520, and the inner diameter of the second pipe section 520 is larger than that of the first pipe section 510. It is understood that this embodiment of the invention replaces the traditional one-time sudden expansion of a small-diameter pipe directly connecting to a large-diameter pipe with a segmented, gradually expanding pipe diameter structure. This multi-stage gradual expansion of the pipe diameter gradually mitigates the pressure of the refrigerant flowing out from the porous material end, ensuring that the pressure drop gradient of the refrigerant entering the evaporator 3000 inlet is not too large. Reference Figure 5 As shown, an embodiment of the present invention also proposes a refrigeration system, including the throttling structure 1000 of the above embodiment.

[0048] The refrigeration system of this utility model adopts the throttling structure 1000 of the above embodiment. By transforming the violent and concentrated flash evaporation process at the outlet of the traditional throttling element into a smooth and controllable phase change process inside the filling member 400, the generation of noise is effectively suppressed. This not only reduces the operating noise of the refrigeration system, but also improves the refrigeration efficiency of the refrigeration system, thereby improving the energy efficiency ratio of the refrigeration system.

[0049] Since the refrigeration system adopts all the technical solutions of the throttling structure 1000 of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0050] This utility model also proposes a refrigeration device, including the refrigeration system described in the above embodiments. In this embodiment, the refrigeration device can be a refrigerator, air conditioner, wine cooler, or other refrigeration unit; this embodiment is not limited to this.

[0051] The refrigeration equipment of this utility model adopts the refrigeration system of the above embodiment. By optimizing the structural design of the throttling structure 1000, it can not only suppress the noise generation of the refrigeration equipment and improve the quietness of the refrigeration equipment, but also improve the refrigeration performance of the refrigeration equipment, reduce the energy consumption of the refrigeration equipment, and improve the user experience.

[0052] Since the refrigeration equipment adopts all the technical solutions of the refrigeration system in the above embodiments, it has at least all the beneficial effects brought about by the technical solutions in the above embodiments, which will not be repeated here.

[0053] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A throttling structure, applied to a refrigeration system having a condenser and an evaporator, characterized in that, include: The first throttling tube is used to connect to the condenser; An expansion tube, the inlet of which is connected to the outlet of the first throttling tube, and the inner diameter of the expansion tube is larger than the inner diameter of the first throttling tube; The second throttling tube has its inlet connected to the outlet of the expansion tube, and its outlet is used to connect to the evaporator. The inner diameter of the second throttling tube is smaller than the inner diameter of the expansion tube. A filler, made of a porous material, is disposed within the expansion tube and configured to allow refrigerant flowing from the first expansion tube to pass through and flow to the second expansion tube.

2. The throttling structure according to claim 1, characterized in that, The filler and the inlet of the expansion tube are spaced apart along the axial direction of the expansion tube. The distance between the end face of the filler near the inlet of the expansion tube and the outlet of the first throttling tube is e, which satisfies: 0mm < e ≤ 5mm.

3. The throttling structure according to claim 2, characterized in that, The length of the filler along the axial direction of the expansion tube is c, which satisfies: 35mm≤c≤45mm.

4. The throttling structure according to any one of claims 1 to 3, characterized in that, The porosity P of the filler satisfies: 45% ≤ P ≤ 60%.

5. The throttling structure according to claim 1, characterized in that, The expansion tube and the first throttling tube are coaxially arranged. The inner diameter of the expansion tube is f, and the inner diameter of the first throttling tube is g, satisfying: 1.3≤f / g≤3.

6. The throttling structure according to claim 1, characterized in that, The second throttling tube is sealed to the expansion tube, and at least a portion of the end face of the inlet of the second throttling tube abuts against the filler to restrict the filler from moving into the interior of the second throttling tube.

7. The throttling structure according to claim 1, characterized in that, The throttling structure further includes a connecting pipe, one end of which is connected to the outlet of the second throttling pipe and the other end of which is connected to the evaporator. The connecting pipe includes multiple pipe segments arranged coaxially. Along the axial direction of the connecting pipe, the multiple pipe segments are arranged sequentially, and the inner diameter of the previous pipe segment is smaller than the inner diameter of the next pipe segment.

8. The throttling structure according to claim 1, characterized in that, The filler is a porous metal component.

9. A refrigeration system, characterized in that, Includes the throttling structure as described in any one of claims 1 to 8.

10. A refrigeration device, characterized in that, Includes the throttling structure as described in claim 9.

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