Silencer, refrigeration assembly and refrigerator

Abstract

The utility model provides a silencer, a refrigeration assembly and a refrigerator, the silencer is applied to the refrigerator, the refrigerator comprises a capillary tube and an evaporation tube, the silencer comprises a first silencing tube and a second silencing tube, the first silencing tube is connected between the capillary tube and the evaporation tube, the first silencing tube comprises a first gradually-shrinking and gradually-expanding cavity, and the second silencing tube comprises a second gradually-shrinking and gradually-expanding cavity; the first gradually-shrinking and gradually-expanding cavity is communicated with the capillary tube and the evaporation tube, and the inner diameter of the first gradually-shrinking and gradually-expanding cavity gradually increases towards the end close to the capillary tube and also gradually increases towards the end close to the evaporation tube. According to the silencer provided by the invention, when a refrigerant flows into the first gradually-shrinking and gradually-expanding cavity from the capillary tube, the flow section of the refrigerant is gradually reduced, so that the flow speed of the refrigerant is gradually increased, then the flow section of the refrigerant is gradually increased, the flow speed of the refrigerant is gradually reduced according to a continuity equation, and the flow speed of the refrigerant is gradually increased through conversion of kinetic energy and potential energy of the refrigerant in the first gradually-shrinking and gradually-expanding cavity; and noise generated by direct jet flow of the refrigerant is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of refrigerators, and particularly relates to a silencer, a refrigerating assembly and a refrigerator. BACKGROUND

[0002] In the existing refrigerator, high-pressure refrigerant is injected into the evaporation pipe at the low-pressure end after throttling through the capillary tube. Since the pipe diameter difference between the capillary tube and the evaporation pipe is large, the refrigerant produces phase change in the flow process, causing pressure fluctuation in the pipeline, and thus noise is generated. CONTENT OF THE UTILITY MODEL

[0003] The silencer, the refrigerating assembly and the refrigerator provided in the application embodiments solve the problem that noise is easily generated when the refrigerant flows from the capillary tube to the evaporation pipe in the existing refrigerator.

[0004] The application embodiments provide a silencer applied to a refrigerator, wherein the refrigerator comprises a capillary tube and an evaporation pipe, and the silencer comprises:

[0005] A first silencing pipe is connected between the capillary tube and the evaporation pipe, and the first silencing pipe comprises a first tapered cavity, the first tapered cavity is communicated with the capillary tube and the evaporation pipe, and the inner diameter of the first tapered cavity gradually increases towards both ends close to the capillary tube and the evaporation pipe.

[0006] Optionally, the first silencing pipe comprises a first tapered pipe section surrounding the first tapered cavity, the first tapered pipe section is provided with a first through hole, and the extension direction of the first through hole intersects with the extension direction of the first tapered cavity.

[0007] The silencer further comprises a sleeve pipe, the sleeve pipe is at least partially sleeved on the outer periphery of the first silencing pipe, and the sleeve pipe surrounds the first tapered pipe section to form a first resonance cavity, and the first resonance cavity is communicated with the first tapered cavity through the first through hole.

[0008] Optionally, the first silencing pipe comprises two first tapered pipe sections, and each first tapered pipe section surrounds the sleeve pipe to form a first resonance cavity.

[0009] Optionally, the first silencing pipe further comprises a straight pipe section, the straight pipe section is connected between the two first tapered pipe sections, the straight pipe section comprises a straight pipe cavity, the straight pipe cavity is communicated with the two first tapered cavities, and the inner diameter of each first tapered cavity close to the straight pipe cavity is the same as the inner diameter of the straight pipe cavity.

[0010] Optionally, one end of the sleeve pipe is sleeved on the outer periphery of the first silencing pipe, and the other end of the sleeve pipe is sleeved in the evaporation pipe.

[0011] The sleeve is internally provided with a limiting part, and the first sound attenuation pipe is sleeved in the sleeve and abuts against the limiting part.

[0012] Optionally, the first tapered and expanding pipe section is further provided with a second through hole, the extension direction of the second through hole is perpendicular to the extension direction of the first through hole, and the second through hole communicates the first tapered and expanding cavity and the first resonance cavity.

[0013] Optionally, the first sound attenuation pipe further comprises a connecting pipe section, which is connected to one end of the first tapered and expanding pipe section close to the capillary tube.

[0014] The sound attenuation device further comprises a second sound attenuation pipe, one end of the second sound attenuation pipe is sleeved in the connecting pipe section and abuts against the inner wall of the first tapered and expanding pipe section, and the other end of the second sound attenuation pipe is sleeved on the outer periphery of the capillary tube, the second sound attenuation pipe comprises a second tapered and expanding cavity, the inner diameter of the second tapered and expanding cavity gradually increases from one end close to the capillary tube to one end close to the evaporating pipe, and the maximum inner diameter of the second tapered and expanding cavity is smaller than the maximum inner diameter of the first tapered and expanding cavity.

[0015] Optionally, the second sound attenuation pipe comprises a second tapered and expanding pipe section, which surrounds to form the second tapered and expanding cavity, and the second tapered and expanding pipe section and the connecting pipe section surround to form a second resonance cavity.

[0016] The second tapered and expanding pipe section is provided with a third through hole, the extension direction of the third through hole intersects with the extension direction of the second tapered and expanding cavity, and the third through hole communicates the second resonance cavity and the second tapered and expanding cavity.

[0017] Embodiments of the present application further provide a refrigeration assembly applied to a refrigerator, the refrigeration assembly comprising:

[0018] a capillary tube;

[0019] an evaporating pipe;

[0020] the sound attenuation device as described above, which is connected between the capillary tube and the evaporating pipe.

[0021] Embodiments of the present application further provide a refrigerator comprising the refrigeration assembly as described above.

[0022] The sound damper provided by the embodiment of the present application is characterized in that the first sound damper pipe is connected between the capillary pipe and the evaporation pipe, the inner diameter of the first tapered and expanded cavity of the first sound damper pipe gradually increases from the end close to the capillary pipe to the end close to the evaporation pipe, so that when the refrigerant flows into the first tapered and expanded cavity from the capillary pipe, the flow cross section of the refrigerant gradually decreases first, the flow rate of the refrigerant gradually increases, and then the flow cross section of the refrigerant gradually increases again, the flow rate of the refrigerant gradually decreases again according to the continuity equation, the kinetic energy and potential energy of the refrigerant in the first tapered and expanded cavity are converted, the jet process of the refrigerant is adjusted, the noise generated by the direct jet of the refrigerant is reduced, and the noise caused by the flow of the refrigerant is further reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] In order to more completely understand the present application and its beneficial effects, the following will be described with reference to the drawings. In the following description, the same reference numerals represent the same parts.

[0025] Figure 1 The first structure diagram of the sound damper provided by the embodiment of the present application.

[0026] Figure 2 The second structure diagram of the sound damper provided by the embodiment of the present application.

[0027] Figure 3 The first structure diagram of the first sound damper pipe of the sound damper provided by the embodiment of the present application.

[0028] Figure 4 The second structure diagram of the first sound damper pipe of the sound damper provided by the embodiment of the present application.

[0029] Figure 5 The first structure diagram of the second sound damper pipe of the sound damper provided by the embodiment of the present application.

[0030] Figure 6 The second structure diagram of the second sound damper pipe of the sound damper provided by the embodiment of the present application.

[0031] Explanation of reference numerals:

[0032] 1, capillary pipe;

[0033] 2, first muffler pipe, 21, first tapered pipe section; 211, first tapered cavity; 212, first through hole; 213, second through hole; 22, straight pipe section; 23, connecting pipe section; 231, second resonance cavity;

[0034] 3, sleeve; 31, first resonance cavity; 32, limiting part;

[0035] 4, second muffler pipe; 41, second tapered pipe section; 411, second tapered cavity; 412, third through hole. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0037] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0038] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the present application, unless specifically defined and limited otherwise, "on" or "under" of a first feature with respect to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature with respect to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. "Under", "below" and "underneath" of a first feature with respect to a second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0040] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the components and arrangements of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0041] The embodiments of the present application provide a silencer, a refrigeration assembly and a refrigerator to solve the problem that noise is easily generated when the refrigerant flows from the capillary tube to the evaporation tube in the existing refrigerator. The following will be described with reference to the accompanying drawings.

[0042] The silencer provided by the embodiments of the present application is applied to a refrigerator, and the refrigerator includes a capillary tube 1 and an evaporation tube. Please refer to Figure 1 and Figure 2 , Figure 1 The first structure diagram of the silencer provided by the embodiments of the present application is shown in the figure, Figure 2 The second structure diagram of the silencer provided by the embodiments of the present application is shown in the figure, and the silencer includes a first silencer tube 2. The first silencer tube 2 is connected between the capillary tube 1 and the evaporation tube. The first silencer tube 2 includes a first gradually tapered and expanded cavity 211. The first gradually tapered and expanded cavity 211 is in communication with the capillary tube 1 and the evaporation tube. The inner diameter of the first gradually tapered and expanded cavity 211 gradually increases towards the end close to the capillary tube 1 and also gradually increases towards the end close to the evaporation tube.

[0043] The sound damper provided by the embodiment of the present application, the first sound pipe 2 is connected between the capillary tube 1 and the evaporation pipe, the inner diameter of the first tapered cavity 211 of the first sound pipe 2 gradually increases from the end close to the capillary tube 1 to the end close to the evaporation pipe, so when the refrigerant flows into the first tapered cavity 211 from the capillary tube 1, the flow cross section of the refrigerant gradually decreases first, so that the flow rate of the refrigerant gradually increases, and then the flow cross section of the refrigerant gradually increases again, according to the continuity equation, the flow rate of the refrigerant gradually decreases again, through the conversion of kinetic energy and potential energy of the refrigerant in the first tapered cavity 211, the jet process of the refrigerant is adjusted, the noise generated by the direct jet of the refrigerant is reduced, and then the noise brought by the flow of the refrigerant is reduced.

[0044] Optionally, referring to Figure 3 and Figure 4 , Figure 3 the first structure diagram of the first sound pipe 2 of the sound damper provided by the embodiment of the present application, Figure 4 the second structure diagram of the first sound pipe 2 of the sound damper provided by the embodiment of the present application, the first sound pipe 2 includes a first tapered pipe section 21 surrounding to form a first tapered cavity 211, the first tapered pipe section 21 is provided with a first through hole 212 penetrating through, the extension direction of the first through hole 212 intersects with the extension direction of the first tapered cavity 211; the sound damper further includes a sleeve 3, the sleeve 3 is at least partially sleeved on the outer periphery of the first sound pipe 2, and surrounds with the first tapered pipe section 21 to form a first resonance cavity 31, the first resonance cavity 31 is communicated with the first tapered cavity 211 through the first through hole 212.

[0045] That is, by wrapping the sleeve 3 on the outer periphery of the first tapered pipe section 21, the first resonance cavity 31 is formed together with the sleeve 3, when the sound wave frequency of the refrigerant in the first tapered cavity 211 is the same as the natural frequency of the first resonance cavity 31, resonance phenomenon occurs, in the resonance state, the vibration speed of the air column in the neck reaches the maximum, and the amplitude also reaches the maximum, at this time, the first resonance cavity 31 can maximize the absorption and storage of sound energy, by using the energy absorption effect of the first resonance cavity 31, the transmission of the refrigerant jet noise energy in the first tapered cavity 211 is reduced, and noise reduction is realized.

[0046] In some examples, the outer diameter of the first tapered pipe section 21 gradually increases from the end close to the capillary tube 1 to the end close to the evaporation pipe, at this time, the sleeve 3 can be a straight pipe, directly sleeved on the outer periphery of the first tapered pipe section 21, and then the first resonance cavity 31 is formed together with the first tapered pipe section 21.

[0047] In some examples, the outer diameter of the first tapered and flared tube segment 21 is uniform (not shown in the drawings), and the inner diameter of the corresponding first tapered and flared tube segment 21 of the sleeve 3 can be slightly larger than the outer diameter of the first tapered and flared tube segment 21, and the first tapered and flared tube segment 21 and the sleeve 3 together form the first resonance cavity 31.

[0048] Optionally, the inner diameters of the two ends of the first tapered and flared cavity 211 can be the same, i.e., the first tapered and flared cavity 211 is a left-right symmetrical structure.

[0049] Optionally, the first sound attenuation tube 2 includes two first tapered and flared tube segments 21, and each first tapered and flared tube segment 21 and the sleeve 3 together form a first resonance cavity 31.

[0050] In some examples, the shapes and sizes of the two first tapered and flared tube segments 21 can be the same.

[0051] In other examples, the shapes of the two first tapered and flared tube segments 21 are the same, and the sizes are different, for example, the minimum inner diameter of the first tapered and flared cavity 211 of a first tapered and flared tube segment 21 close to the capillary tube 1 can be 30 mm, the first tapered and flared cavity 211 expands by 1.2 times from the minimum inner diameter to both ends, and the length of the first tapered and flared cavity 211 can be 31 mm, and the minimum inner diameter of the first tapered and flared cavity 211 of a first tapered and flared tube segment 21 close to the evaporating tube can be 32 mm, the first tapered and flared cavity 211 expands by 1.2 times from the minimum inner diameter to both ends, and the length of the first tapered and flared cavity 211 can be 33 mm.

[0052] As an alternative embodiment, the first sound attenuation tube 2 can also include multiple first tapered and flared tube segments 21, and each first tapered and flared tube segment 21 and the sleeve 3 together form a first resonance cavity 31. The multiple first resonance cavities 31 increase the sound attenuation effect of the first sound attenuation tube 2.

[0053] Optionally, the first sound attenuation tube 2 further includes a straight tube segment 22 connected between the two first tapered and flared tube segments 21, and the straight tube segment 22 includes a straight tube cavity communicating with the two first tapered and flared cavities 211, and the inner diameter of each first tapered and flared cavity 211 close to one end of the straight tube cavity is the same as the inner diameter of the straight tube cavity.

[0054] By connecting the straight tube cavity between the two first tapered and flared cavities 211, a certain pressure increase space is provided for the refrigerant jet, so that the speed of the refrigerant in the straight tube cavity can continuously decrease, thereby further reducing the noise of the refrigerant jet. At the same time, the inner diameter of each first tapered and flared cavity 211 close to one end of the straight tube cavity is the same as the inner diameter of the straight tube cavity, so that the refrigerant can smoothly transition between the first tapered and flared cavity 211 and the straight tube cavity, avoiding the increase of noise caused by the change of the flow cross section.

[0055] Optionally, the sleeve pipe 3 is sleeved on the outer periphery of the first muffler pipe 2 at one end and on the evaporating pipe at the other end; the sleeve pipe 3 is internally provided with a limiting portion 32, and the first muffler pipe 2 is sleeved in the sleeve pipe 3 and abuts against the limiting portion 32. That is, the limiting portion 32 is arranged on the sleeve pipe 3 to provide a fixing structure for the first muffler pipe 2, so as to prevent the first muffler pipe 2 from moving in the sleeve pipe 3.

[0056] In some examples, the limiting portion 32 can be a protrusion arranged on the inner wall of the first muffler pipe 2.

[0057] Optionally, the first tapered and expanding pipe section 21 is further provided with a second through hole 213, the extension direction of the second through hole 213 is perpendicular to the extension direction of the first through hole 212, and the second through hole 213 communicates the first tapered and expanding cavity 211 and the first resonance cavity 31. According to the target sound wave frequency of the refrigerant to be eliminated, the first through hole 212 or the second through hole 213 can be arranged or increased to change the natural frequency of the resonance cavity, so as to eliminate the noise in the corresponding frequency band. The shape and size of the first through hole 212 or the second through hole 213 are not limited further herein. The extension direction of the second through hole 213 is perpendicular to the extension direction of the first through hole 212, which facilitates positioning of the first through hole 212 and the second through hole 213 during manufacturing of the first muffler pipe 2.

[0058] Optionally, the first muffler pipe 2 further comprises a connecting pipe section 23, which is connected to one end of the first tapered and expanding pipe section 21 close to the capillary tube 1; please refer to Figure 5 and Figure 6 , Figure 5 a first structure diagram of a second muffler pipe 4 of a muffler provided by the embodiment of the application, Figure 6 a second structure diagram of the second muffler pipe 4 of the muffler provided by the embodiment of the application, the muffler further comprises a second muffler pipe 4, one end of the second muffler pipe 4 is sleeved in the connecting pipe section 23 and abuts against the inner wall of the first tapered and expanding pipe section 21, and the other end is sleeved on the outer periphery of the capillary tube 1; the second muffler pipe 4 comprises a second tapered and expanding cavity 411, the inner diameter of the second tapered and expanding cavity 411 gradually increases towards one end close to the capillary tube 1 and also gradually increases towards one end close to the evaporating pipe, and the maximum inner diameter of the second tapered and expanding cavity 411 is smaller than the maximum inner diameter of the first tapered and expanding cavity 211. The shape of the second tapered and expanding cavity 411 can be the same as that of the first tapered and expanding cavity 211.

[0059] By setting the second muffler pipe 4, the muffling effect of the muffler is further increased, wherein the shape of the second muffler pipe 4 can be the same as that of the first muffler pipe 2, but the size of the second tapered cavity 411 of the second muffler pipe 4 is smaller than that of the first tapered cavity 211, that is, the maximum inner diameter of the second tapered cavity 411 is smaller than that of the first tapered cavity 211, so that the flow cross section gradually increases during the flow of the refrigerant from the capillary tube 1 to the evaporating tube, the sudden size of the inner diameter is reduced, and then the proportion of the phase change of the refrigerant is reduced, and then the proportion of the gaseous refrigerant is reduced, so as to reduce the drag effect of the gaseous refrigerant on the liquid refrigerant, thereby reducing the fluctuation and shock of the liquid refrigerant, reducing the pressure fluctuation in the muffler, and improving the muffling effect.

[0060] Optionally, the second muffler pipe 4 comprises a second tapered pipe section 41 surrounding the second tapered cavity 411, and the second tapered pipe section 41 and the connecting pipe section 23 surround the second resonance cavity 231; the second tapered pipe section 41 is provided with a third through hole 412, the extension direction of the third through hole 412 intersects with the extension direction of the second tapered cavity 411, and the third through hole 412 communicates the second resonance cavity 231 and the second tapered cavity 411.

[0061] That is, the second tapered pipe section 41 and the connecting pipe section 23 surround the second resonance cavity 231, and the sound attenuation principle of the second resonance cavity 231 refers to the sound attenuation principle of the first resonance cavity 31, which will not be described here.

[0062] Optionally, the second muffler pipe 4 can also comprise two second tapered pipe sections 41, and each second tapered pipe section 41 surrounds a second resonance cavity 231 with the connecting pipe section 23.

[0063] In some examples, the shapes and sizes of the two second tapered pipe sections 41 can be the same.

[0064] In other examples, the shapes of the two second tapered pipe sections 41 are the same, and the sizes are different, for example, the minimum inner diameter of the second tapered cavity 411 of one second tapered pipe section 41 close to the capillary tube 1 can be 18mm, the expansion ratio of the second tapered cavity 411 from the minimum inner diameter to both ends is 1.2 times, and the length of the second tapered cavity 411 can be 23mm, the minimum inner diameter of the second tapered cavity 411 of one second tapered pipe section 41 close to the evaporating tube can be 19mm, the expansion ratio of the second tapered cavity 411 from the minimum inner diameter to both ends is 1.2 times, and the length of the second tapered cavity 411 can be 24mm.

[0065] Optionally, the second muffler pipe 4 further comprises a connecting section connected to one end of the second gradually-tapered gradually-expanded pipe section 41 close to the capillary tube 1; one end of the capillary tube 1 is sleeved in the connecting section and abuts against the inner wall of the second gradually-tapered gradually-expanded pipe section 41, preventing the capillary tube 1 from moving in the connecting section.

[0066] The application further provides a refrigeration assembly applied to a refrigerator, which comprises the capillary tube 1, an evaporating pipe and the muffler as described above, and the muffler is connected between the capillary tube 1 and the evaporating pipe.

[0067] The application further provides a refrigerator comprising the refrigeration assembly as described above.

[0068] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0069] The muffler, the refrigeration assembly and the refrigerator provided by the embodiments of the application are described in detail above, and the principles and implementation manners of the application are described by applying specific examples in this paper; the above embodiment descriptions are only used to help understand the method of the application and its core idea; meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the application; in conclusion, the content of the specification should not be understood as a limitation of the application.

Claims

1. A sound damper applied to a refrigerator, the refrigerator including a capillary tube and an evaporation tube, characterized in that, The muffler comprises: A first sound attenuation pipe connected between the capillary pipe and the evaporating pipe, the first sound attenuation pipe comprising a first converging-diverging cavity, the first converging-diverging cavity being in communication with the capillary pipe and the evaporating pipe, the inner diameter of the first converging-diverging cavity gradually increasing from the end close to the capillary pipe to the end close to the evaporating pipe.

2. The muffler of claim 1, wherein The first sound attenuation pipe comprises a first converging-diverging pipe section surrounding the first converging-diverging cavity, the first converging-diverging pipe section being provided with a first through hole, the extension direction of the first through hole being intersected with the extension direction of the first converging-diverging cavity; The muffler further comprises a sleeve pipe, the sleeve pipe being at least partially sleeved on the outer periphery of the first sound attenuation pipe and surrounding the first converging-diverging pipe section to form a first resonance cavity, the first resonance cavity being in communication with the first converging-diverging cavity through the first through hole.

3. The muffler of claim 2, wherein The first sound attenuation pipe comprises two first converging-diverging pipe sections, each of the first converging-diverging pipe sections surrounding the sleeve pipe to form a first resonance cavity.

4. The muffler of claim 3, wherein The first sound attenuation pipe further comprises a straight pipe section connected between the two first converging-diverging pipe sections, the straight pipe section comprising a straight pipe cavity, the straight pipe cavity being in communication with the two first converging-diverging cavities, and the inner diameter of the end of each of the first converging-diverging cavities close to the straight pipe cavity being the same as the inner diameter of the straight pipe cavity.

5. The muffler of claim 2, wherein One end of the sleeve pipe is sleeved on the outer periphery of the first sound attenuation pipe, and the other end is sleeved in the evaporating pipe; The sleeve pipe is internally provided with a limiting portion, and one end of the first sound attenuation pipe is sleeved in the sleeve pipe and abuts against the limiting portion.

6. The muffler of claim 2, wherein The first converging-diverging pipe section is further provided with a second through hole, the extension direction of the second through hole being perpendicular to the extension direction of the first through hole, and the second through hole being in communication with the first converging-diverging cavity and the first resonance cavity.

7. The muffler of claim 2, wherein The first sound attenuation pipe further comprises a connecting pipe section connected to the end of the first converging-diverging pipe section close to the capillary pipe; The muffler further comprises a second sound attenuation pipe, one end of the second sound attenuation pipe being sleeved in the connecting pipe section and abutting against the inner wall of the first converging-diverging pipe section, and the other end being sleeved on the outer periphery of the capillary pipe, the second sound attenuation pipe comprising a second converging-diverging cavity, the inner diameter of the second converging-diverging cavity gradually increasing from the end close to the capillary pipe to the end close to the evaporating pipe, and the maximum inner diameter of the second converging-diverging cavity being smaller than the maximum inner diameter of the first converging-diverging cavity.

8. The muffler of claim 7, wherein The second sound attenuation pipe comprises a second converging-diverging pipe section surrounding the second converging-diverging cavity, the second converging-diverging pipe section surrounding the connecting pipe section to form a second resonance cavity; The second converging-diverging pipe section is further provided with a third through hole, the extension direction of the third through hole being intersected with the extension direction of the second converging-diverging cavity, and the third through hole being in communication with the second resonance cavity and the second converging-diverging cavity.

9. A refrigeration assembly for use in a refrigerator, characterized by The refrigeration assembly comprises: A capillary pipe; An evaporating pipe; The muffler according to any one of claims 1-8, the muffler being connected between the capillary pipe and the evaporating pipe.

10. A refrigerator characterized by comprising: The refrigeration assembly according to claim 9.

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