Noise reduction pipeline and refrigerator
By designing noise reduction pipelines, using expansion cavities and silencers to reflect and interfere with noise on the transmission path, and refining bubbles at the sound source, the problems of refrigerator refrigerant injection and bubble burst noise were solved, and the noise reduction effect was achieved.
Patent Information
- Application Number
- CN202422426075.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-09-09
- Estimated Expiration
- 2034-10-08
AI Technical Summary
When the refrigerant enters the evaporator from the capillary tube, the refrigerator produces strong injection noise and bubble burst noise, which affects the user experience.
A noise reduction pipeline is designed, including an expansion tube, an inner tube and a silencer. By arranging an expansion cavity and a silencer on the transmission path, noise transmission is reduced; large bubbles are converted into small bubbles through bubble refinement holes at the sound source to stabilize the flow of refrigerant.
It effectively reduces the noise of refrigerant injection and bubble bursting, improves the operating noise level of the refrigerator, and enhances the user experience.
Smart Images
Figure CN223321002U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of household appliances, and in particular to a noise reduction pipeline and a refrigerator. Background Art
[0002] Capillary tubes and evaporators are essential components of a refrigerator's refrigeration system. Capillary tubes are used for throttling and reducing pressure, while evaporators absorb heat and cool the air. Because the capillary tube's cross-sectional area is very small and the refrigerant's flow rate is relatively high, when the refrigerant flows directly from the capillary tube's outlet into the evaporator's inlet, the tube's cross-sectional area suddenly expands, generating a strong injection noise. Furthermore, due to changes in the refrigerant's temperature, pressure, and state, the capillary tube's outlet is a two-phase refrigerant flow. Due to the flow rate difference between the gas and liquid phases, the refrigerant produces bubbles of varying sizes. The rupture of large bubbles in the plug flow also produces a significant amount of noise. The presence of injection noise and bubble bursting noise increases the noise level during refrigerator operation, impacting the user's auditory experience. Utility Model Content
[0003] The present application provides a noise reduction pipeline and a refrigerator to solve related technical problems.
[0004] The present application provides a noise reduction pipeline, comprising: an expansion tube, a first internal tube, a second internal tube and an evaporator connector; an expansion cavity is provided in the expansion tube; the first internal tube comprises a first input end and a first output end, the first output end extends into the expansion cavity; the second internal tube comprises a second input end and a second output end, the second input end extends into the expansion cavity; the evaporator connector is assembled to the second output end; at least one of the first output end and the second output end is provided with a silencer, and the silencer is provided with bubble refinement holes.
[0005] Furthermore, the length of the first internal tube extending into the expansion cavity is not equal to the length of the second internal tube extending into the expansion cavity.
[0006] Furthermore, the expansion tube includes a first expansion tube and a second expansion tube that are connected to each other; the expansion cavity includes a first expansion cavity arranged in the first expansion tube and a second expansion cavity arranged in the second expansion tube; the first output end extends into the first expansion cavity; and the second input end extends into the second expansion cavity.
[0007] Furthermore, the lengths of the first expansion cavity and the second expansion cavity are not equal.
[0008] Furthermore, a third internal tube is included, and the third internal tube includes a third input end and a third output end. The third input end extends into the first expansion cavity, and the third output end extends into the second expansion cavity.
[0009] Furthermore, the length of the first internal tube extending into the first expansion cavity is not equal to the length of the third internal tube extending into the first expansion cavity; and / or the length of the second internal tube extending into the second expansion cavity is not equal to the length of the third internal tube extending into the second expansion cavity.
[0010] Furthermore, the third output end is provided with the sound-absorbing component.
[0011] Furthermore, a third expansion cavity is provided in the evaporator connecting piece; and the second output end extends into the third expansion cavity.
[0012] Furthermore, the evaporator connecting piece includes a pipeline connecting end and an evaporator connecting end that are arranged opposite to each other; the pipeline connecting end is connected to the second output end; the evaporator connecting piece also includes a contraction section, and the inner diameter of the contraction section gradually decreases in the direction from the pipeline connecting end to the evaporator connecting end.
[0013] Furthermore, the evaporator connecting member includes an evaporator connecting end, and the evaporator connecting end is provided with the muffler.
[0014] Furthermore, the evaporator connecting member includes an evaporator connecting end, and the evaporator connecting end is provided with a vibration damping member.
[0015] The present application also provides a refrigerator, comprising: a capillary tube, an evaporator, and the noise reduction pipeline as described above; the capillary tube is connected to the first input end, and the evaporator is connected to the evaporator connector.
[0016] This application improves the noise reduction effect of the noise reduction pipeline from two perspectives: the transmission path and the sound source. Regarding the transmission path, by providing an expansion tube, a first internal pipe, and a second internal pipe, the noise generated by the refrigerant undergoes two sudden changes in the pipe cross-section during transmission. The sound waves are reflected and interfered within the expansion cavity, reducing their own energy and the noise level transmitted to the outside.
[0017] In terms of sound source, by setting bubble refinement holes on the silencer, large bubbles in the plug flow can be converted into multiple small bubbles in the bubbly flow, making the flow of refrigerant smoother and reducing the noise generated by bubble bursting.
[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which constitute a part of the present disclosure, are used to provide a further understanding of the present disclosure. The exemplary embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation to the present disclosure.
[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0021] Figure 1 It is a structural schematic diagram of a noise reduction pipeline in an exemplary embodiment of the present application;
[0022] Figure 2 is a schematic structural diagram of a sound-absorbing member in an exemplary embodiment of the present application;
[0023] Figure 3 is a schematic structural diagram of another sound-absorbing member in an exemplary embodiment of the present application;
[0024] Figure 4 is a structural schematic diagram of another noise reduction pipeline in an exemplary embodiment of the present application;
[0025] Figure 5 yes Figure 4 A partial enlarged view of the first expansion cavity in the middle;
[0026] Figure 6 yes Figure 4 A partial enlarged view of the second expansion cavity;
[0027] Figure 7 is a refrigeration circuit diagram of a refrigerator in an exemplary embodiment of the present application;
[0028] Figure 8 yes Figure 7 Schematic diagram of part of the refrigeration circuit.
[0029] Explanation of the accompanying figures: noise reduction pipeline-1; expansion tube-10; expansion chamber-100; first expansion chamber-101; second expansion chamber-102; first expansion tube-11; second expansion tube-12; first internal pipe-20; first input end-21; first output end-22; second internal pipe-30; second input end-31; second output end-32; evaporator connecting piece-40; third expansion chamber-400; pipeline connecting piece-41; evaporator connecting piece-42; contraction section-43; vibration damping piece-44; silencer-50; bubble refinement hole-51; central hole-511; peripheral hole-512; third internal pipe-60; third input end-61; third output end-62; compressor-71; condenser-72; capillary tube-73; evaporator-74. DETAILED DESCRIPTION
[0030] Here, the technical solutions in the embodiments (or "implementations") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.
[0031] If there are terms related to directional indications or positional relationships in the embodiments of this application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of this application are only used for the purpose of convenience of description and should not be understood as indicating or implying relative importance.
[0032] Because the capillary tube and the evaporator have different cross-sections, refrigerant generates injection noise when it is transferred from the capillary tube to the evaporator. Furthermore, due to changes in refrigerant temperature, pressure, and state, the capillary tube outlet is a two-phase refrigerant fluid. This difference in flow rates between the two phases creates bubbles of varying sizes during the refrigerant flow, which also generate significant noise when the bubbles burst. This application provides a noise-reducing pipeline and refrigerator to address related technical issues.
[0033] like Figure 1 As shown, the present application provides a noise reduction pipeline, comprising an expansion pipe 10, a first internal pipe 20, a second internal pipe 30 and an evaporator connector 40. An expansion cavity 100 is provided in the expansion pipe 10.
[0034] The first internal pipe 20 includes a first input end 21 and a first output end 22. The first input end 21 is used to connect to the capillary tube. The first output end 22 extends into the expansion chamber 100. The second internal pipe 30 includes a second input end 31 and a second output end 32. The second input end 31 extends into the expansion chamber 100. The evaporator connector 40 is assembled to the second output end 32.
[0035] At least one of the first output end 22 and the second output end 32 is provided with a muffler 50 , and the muffler 50 is provided with bubble refining holes 51 .
[0036] The present application reduces noise levels from two perspectives: the transmission path and the sound source. In terms of the transmission path, by providing an expansion tube 10, a first internal pipe 20, and a second internal pipe 30, the noise reduction pipeline can suppress noise along the transmission path. During the refrigerant's travel, the noise generated by it will undergo two sudden changes in the pipe cross-section, and the sound impedance will also mutate simultaneously, causing the transmission direction of the sound wave to change. During this process, the sound waves will reflect and interfere within the noise reduction pipeline, reducing their own energy and thus reducing the noise level transmitted to the outside of the noise reduction pipeline.
[0037] Regarding the sound source, the provision of bubble refinement holes 51 on the muffler 50 suppresses noise at the source. Large plug-like bubbles in the refrigerant are converted into multiple small bubbly bubbles after passing through the muffler 50. This reduces the refrigerant's Reynolds number and stabilizes the flow, thereby reducing noise during fluid outflow. Specifically, the muffler 50 may be provided only at the first output end 22, or only at the second output end 32. Alternatively, both the first and second output ends 22, 32 may be provided with mufflers 50.
[0038] The Reynolds number is physically expressed as the ratio of the inertial force to the viscous force level. The smaller the value, the greater the viscous force level of the fluid and the more stable the fluid flow. The formula for the Reynolds number is shown below (1):
[0039] Re=ρul / v (1)
[0040] Where ρ is the density of the fluid, u is the flow velocity of the fluid, v is the viscosity coefficient of the fluid, and l is the characteristic length of the fluid during flow. Because the range of variation in fluid density, flow velocity, and viscosity is small for specific refrigerant operating conditions, the bubble refinement holes 51 provided on the muffler 50 in this application can reduce the Reynolds number of the refrigerant by reducing the characteristic length l. This changes the flow state of the refrigerant while reducing injection noise and improving the noise reduction effect of the noise reduction pipeline.
[0041] like Figure 2 and Figure 3 As shown, the muffler 50 may be in the shape of a circular plate, with bubble refinement holes 51 spaced apart on the muffler 50. The specific distribution of the bubble refinement holes 51 on the muffler 50 is not limited. For example, the bubble refinement holes 51 may include a central hole 511 and peripheral holes 512, with the central hole 511 being located in the middle of the muffler 50 and the peripheral holes 512 surrounding the central hole 511.
[0042] In such Figure 2 In the embodiment shown, the number of the bubble refinement holes 51 may be eight, including one central hole 511 and seven peripheral holes 512. Figure 3In the illustrated embodiment, the number of bubble refinement holes 51 may be five, including a central hole 511 and four peripheral holes 512. In other embodiments, the specific number of bubble refinement holes 51 is not limited, as long as it can achieve the effect of refining bubbles.
[0043] The inner diameters of the first inner tube 20 and the second inner tube 30 can be the same or different. When the inner diameters of the first inner tube 20 and the second inner tube 30 are the same, the design and manufacture of the noise reduction pipeline are simpler, which improves production efficiency and reduces costs. Figure 1 In the embodiment shown, when the inner diameters of the first inner tube 20 and the second inner tube 30 are the same, the noise reduction calculation of the expansion cavity 100 is shown in the following formula (2):
[0044] TL=10lg[1+0.25(m s -m s -1 ) 2 sin 2 kl] (2)
[0045] Among them, TL (Transmission Loss) represents the noise reduction of the noise reduction pipeline. s represents the expansion ratio, which is the ratio of the cross-sectional area of the expansion cavity 100 to the cross-sectional area inside the first inner tube 20. l is the length of the expansion cavity. k is the conversion coefficient, which is 2π / λ, where λ is the preset noise elimination wavelength.
[0046] From the above formula, we can know that when l=(2n+1)λ / 4, kl=(2n+1)π / 2, then sin 2 When kl = 1, TL reaches its highest value, achieving maximum sound attenuation. Therefore, to achieve maximum sound attenuation, the desired noise wavelength can be determined, and then the length of expansion cavity 100 can be selected based on the above formula. Specifically, the wavelength can be determined based on the desired noise frequency u, using the formula λ = u / f, where u is the speed of sound and f is the frequency.
[0047] In one embodiment, if Figure 1 As shown, the number of expansion chambers 100 can be one. In this embodiment, the length of the first internal pipe 20 extending into the expansion chamber 100 is different from the length of the second internal pipe 30 extending into the expansion chamber 100. By providing internal pipes of different lengths, noise of different passing frequencies can be eliminated, thereby improving the broadband noise reduction effect of the noise reduction pipeline.
[0048] The length of the first internal tube 20 and the second internal tube 30 extending into the expansion cavity 100 is not limited. For example, the length of the first internal tube 20 extending into the expansion cavity 100 can be half the length of the expansion cavity 100. The length of the second internal tube 30 extending into the expansion cavity 100 can be one-quarter the length of the expansion cavity 100. Figure 1 As shown, if the length of the expansion cavity 100 is L, the length of the first internal tube 20 extending into the expansion cavity 100 may be L / 2, and the length of the second internal tube 30 extending into the expansion cavity 100 may be L / 4.
[0049] In one embodiment, if Figure 4 As shown, the expansion tube 10 may include a first expansion tube 11 and a second expansion tube 12. The expansion chamber 100 includes a first expansion chamber 101 disposed within the first expansion tube 11 and a second expansion chamber 102 disposed within the second expansion tube 12. The first output end 22 extends into the first expansion chamber 101. The second input end 31 extends into the second expansion chamber 102. Providing multiple expansion chambers improves the noise reduction effect of the noise reduction pipeline. In other embodiments, the expansion tubes 10 may be three or more to further improve the noise reduction effect of the noise reduction pipeline.
[0050] In one embodiment, the lengths of the first expansion chamber 101 and the second expansion chamber 102 may be different. Due to the different lengths of the first expansion chamber 101 and the second expansion chamber 102, the first expansion chamber 101 and the second expansion chamber 102 can eliminate noises of different frequencies to achieve a broadband noise reduction effect. The specific lengths of the first expansion chamber 101 and the second expansion chamber 102 are not limited. For example, the length of the second expansion chamber 102 can be twice the length of the first expansion chamber 101. Figure 4 As shown, if the length of the first expansion cavity 101 is L, the length of the second expansion cavity 102 may be 2L.
[0051] The first expansion tube 11 and the second expansion tube 12 can be connected via an internal pipe. In one embodiment, the noise reduction pipeline further includes a third internal pipe 60. The third internal pipe 60 includes a third input end 61 and a third output end 62. The third input end 61 extends into the first expansion cavity 101, and the third output end 62 extends into the second expansion cavity 102. The provision of the third internal pipe 60 further enhances the noise reduction effect of the noise reduction pipeline. In other embodiments, the connection method between the first expansion tube 11 and the second expansion tube 12 is not limited.
[0052] In one embodiment, the length of the first internal tube 20 extending into the first expansion chamber 101 may not be equal to the length of the third internal tube 60 extending into the first expansion chamber 101. Furthermore, the length of the second internal tube 30 extending into the second expansion chamber 102 may not be equal to the length of the third internal tube 60 extending into the second expansion chamber 102.
[0053] By providing internal pipes of different lengths, noise of different passing frequencies can be eliminated, further enhancing the broadband noise reduction effect of the noise reduction pipeline. In other embodiments, only the first internal pipe 20 and the third internal pipe 60 may have different lengths extending into the first expansion chamber 101, or only the second internal pipe 30 and the third internal pipe 60 may have different lengths extending into the second expansion chamber 102.
[0054] Specifically, if Figure 5 As shown, the length of the first internal tube 20 extending into the first expansion chamber 101 may be half the length of the first expansion chamber 101, and the length of the third internal tube 60 extending into the first expansion chamber 101 may be one-quarter the length of the first expansion chamber 101. That is, if the length of the first expansion chamber 101 is L, the length of the first internal tube 20 extending into the first expansion chamber 101 is L / 2, and the length of the second internal tube 30 extending into the second expansion chamber 102 is L / 4.
[0055] like Figure 6 As shown, the length of the third internal tube 60 extending into the second expansion chamber 102 may be half the length of the second expansion chamber 102, and the length of the second internal tube 30 extending into the second expansion chamber 102 may be one-quarter the length of the second expansion chamber 102. That is, if the length of the second expansion chamber 102 is 2L, the length of the third internal tube 60 extending into the second expansion chamber 102 is L, and the length of the second internal tube 30 extending into the second expansion chamber 102 is L / 2.
[0056] In other embodiments, the specific lengths of the first internal tube 20 and the third internal tube 60 extending into the first expansion cavity 101 are not limited. The specific lengths of the second internal tube 30 and the third internal tube 60 extending into the second expansion cavity 102 are also not limited.
[0057] In one embodiment, if Figure 3 and Figure 4 As shown, the third output end 62 may be provided with a silencer 50. By providing silencers 50 at multiple output ends in the noise reduction pipeline, the refinement degree of the bubbles in the noise reduction pipeline is increased, the noise generated by the bubbles is further reduced, and the noise reduction effect of the noise reduction pipeline is improved.
[0058] like Figure 1 As shown, the evaporator connector 40 is used to connect to the evaporator. In one embodiment, a third expansion cavity 400 may be provided within the evaporator connector 40. The second output end 32 extends into the third expansion cavity 400. By providing the third expansion cavity 400 within the evaporator connector 40, the evaporator connector 40 also provides a certain noise reduction effect, thereby improving the noise reduction effect of the noise reduction pipeline.
[0059] In one embodiment, if Figure 1 and Figure 4As shown, the evaporator connector 40 includes a pipe connection end 41, an evaporator connection end 42, and a contraction section 43. The pipe connection end 41 and the evaporator connection end 42 are disposed opposite each other. The contraction section 43 is located between the pipe connection end 41 and the evaporator connection end 42. The inner diameter of the contraction section 43 gradually decreases in the direction from the pipe connection end 41 to the evaporator connection end 42.
[0060] By providing the contraction section 43, the size of the evaporator connection end 42 can match the evaporator pipeline, thereby improving the stability of the refrigerant flow and further enhancing the noise reduction effect of the noise reduction pipeline. In other embodiments, the specific structure of the evaporator connector 40 is not limited.
[0061] In one embodiment, if Figure 3 and Figure 4 As shown, the evaporator connection end 42 may be provided with a muffler 50. Since at least one of the first output end 22 and the second output end 32 is provided with the muffler 50, by providing the muffler 50 at the evaporator connection end 42, the number of mufflers 50 in the noise reduction pipeline is increased, the bubbles in the refrigerant are repeatedly refined, the flow stability of the refrigerant is further improved, and the noise reduction effect of the noise reduction pipeline is improved.
[0062] In one embodiment, if Figure 4 As shown, the evaporator connection end 42 may be provided with a vibration damper 44. This damper 44, on the one hand, reduces vibration of the noise reduction pipeline during refrigerant flow, thereby reducing noise. Furthermore, the damper 44, located at the connection between the noise reduction pipeline and the evaporator, blocks the noise transmission path, reducing the noise transmitted to the outside.
[0063] like Figure 7 and Figure 8 As shown, the present application also provides a refrigerator comprising a capillary tube 73, an evaporator 74, and the aforementioned noise reduction circuit 1. The capillary tube 73 is connected to the first input end 21, and the evaporator 74 is connected to the evaporator connector 40. Because the noise reduction circuit of the present application has a good noise reduction effect, the refrigerator of the present application has lower operating noise, thereby improving the user experience.
[0064] Figure 7 This is a schematic diagram of the refrigerator's refrigeration circuit. The refrigerator also includes a compressor 71 and a condenser 72. The refrigerant originates from compressor 71, passes through condenser 72, capillary tube 73, noise reduction pipe 1, evaporator 74, and then returns to compressor 71, completing the refrigeration cycle.
[0065] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included in the scope of protection of this application.
Claims
1. A noise reduction pipeline, characterized in that: include: expansion tube, first internal tube, second internal tube and evaporator connector; An expansion cavity is provided in the expansion tube; The first internal pipe includes a first input end and a first output end, and the first output end extends into the expansion cavity; the second internal pipe includes a second input end and a second output end, and the second input end extends into the expansion cavity; The evaporator connector is assembled to the second output end; At least one of the first output end and the second output end is provided with a muffler, and the muffler is provided with bubble refinement holes.
2. The noise reduction pipeline according to claim 1, characterized in that: The length of the first internal tube extending into the expansion cavity is not equal to the length of the second internal tube extending into the expansion cavity.
3. The noise reduction pipeline according to claim 1, characterized in that: The expansion tube includes a first expansion tube and a second expansion tube that are connected to each other; The expansion cavity includes a first expansion cavity provided in the first expansion tube and a second expansion cavity provided in the second expansion tube; The first output end extends into the first expansion cavity; The second input end extends into the second expansion cavity.
4. The noise reduction pipeline according to claim 3, characterized in that: The lengths of the first expansion cavity and the second expansion cavity are not equal.
5. The noise reduction pipeline according to claim 3, characterized in that: It also includes a third internal tube, which includes a third input end and a third output end. The third input end extends into the first expansion cavity, and the third output end extends into the second expansion cavity.
6. The noise reduction pipeline according to claim 5, characterized in that: The length of the first internal tube extending into the first expansion cavity is not equal to the length of the third internal tube extending into the first expansion cavity; And / or, the length of the second internal tube extending into the second expansion cavity is not equal to the length of the third internal tube extending into the second expansion cavity.
7. The noise reduction pipeline according to claim 5, characterized in that: The third output end is provided with the sound-absorbing component.
8. The noise reduction pipeline according to claim 1, characterized in that: A third expansion cavity is provided in the evaporator connecting piece; the second output end extends into the third expansion cavity.
9. The noise reduction pipeline according to claim 1, characterized in that: The evaporator connecting piece includes a pipeline connecting end and an evaporator connecting end that are arranged opposite to each other; the pipeline connecting end is connected to the second output end; The evaporator connecting piece further includes a contraction section, and the inner diameter of the contraction section gradually decreases in the direction from the pipeline connecting end to the evaporator connecting end.
10. The noise reduction pipeline according to claim 1, characterized in that: The evaporator connecting member includes an evaporator connecting end, and the evaporator connecting end is provided with the muffler.
11. The noise reduction pipeline according to claim 1, characterized in that: The evaporator connecting member includes an evaporator connecting end, and the evaporator connecting end is provided with a vibration damping member.
12. A refrigerator, characterized in that: include: A capillary tube, an evaporator, and a noise reduction pipeline according to any one of claims 1 to 11; The capillary tube is connected to the first input end, and the evaporator is connected to the evaporator connecting piece.