CN117128670A - Fluid pipeline assembly and refrigeration equipment - Google Patents

Fluid pipeline assembly and refrigeration equipment Download PDF

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Publication number
CN117128670A
CN117128670A CN202210557989.0A CN202210557989A CN117128670A CN 117128670 A CN117128670 A CN 117128670A CN 202210557989 A CN202210557989 A CN 202210557989A CN 117128670 A CN117128670 A CN 117128670A
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China
Prior art keywords
transition
tube
pipe
section
sections
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210557989.0A
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Chinese (zh)
Inventor
曹继来
江俊
陈鑫
王利亚
李语亭
陈千一
周世文
刘圆圆
钟泽
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Hefei Hualing Co Ltd
Midea Group Co Ltd
Hefei Midea Refrigerator Co Ltd
Original Assignee
Hefei Hualing Co Ltd
Midea Group Co Ltd
Hefei Midea Refrigerator Co Ltd
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Application filed by Hefei Hualing Co Ltd, Midea Group Co Ltd, Hefei Midea Refrigerator Co Ltd filed Critical Hefei Hualing Co Ltd
Priority to CN202210557989.0A priority Critical patent/CN117128670A/en
Publication of CN117128670A publication Critical patent/CN117128670A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/37—Capillary tubes
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid Mechanics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Pipe Accessories (AREA)

Abstract

The application discloses a fluid pipeline assembly and refrigeration equipment. Wherein, the fluid conduit assembly includes: capillary, evaporating pipe and expanding pipe. The evaporation tube is connected with the liquid outlet end of the capillary tube and the input end of the evaporation tube, the gradually-expanding tube comprises a first number of transition tube sections and a connecting tube section for connecting two adjacent transition tube sections, and the inner diameters of the first number of transition tube sections are sequentially increased along the direction from the liquid outlet end of the capillary tube to the input end of the evaporation tube; the first transition pipe sections comprise an inlet transition pipe section connected with the capillary tube, an outlet transition pipe section connected with the evaporation pipe and a sub-transition pipe section positioned between the inlet transition pipe section and the outlet transition pipe section, and the reduction ratio of the inlet transition pipe section to the sub-transition pipe section connected with the inlet transition pipe section is more than 1 and less than or equal to 2. Therefore, the rapid fluid velocity dip between the inlet transition pipe section and the adjacent sub-transition pipe sections is avoided, jet flow generated by excessively rapid deceleration is avoided, and noise generated by fluid flowing in the gradually-expanding pipe is further reduced.

Description

Fluid pipeline assembly and refrigeration equipment
Technical Field
The application belongs to the technical field of refrigeration, and particularly relates to a fluid pipeline assembly and refrigeration equipment.
Background
In a refrigeration pipeline system, a capillary tube is an important throttling element, an outlet of the capillary tube is connected with an evaporator, and the refrigerant is converted into a gaseous state in the evaporator to realize heat transfer. The flow resistance of the refrigerant is increased along the length direction of the capillary tube, and when the pressure of the refrigerant is reduced below the saturated vapor pressure, the refrigerant is gasified, and the refrigerant exists in a gas-liquid two-phase state. At the junction of the capillary tube and the evaporation tube of the evaporator, the diameter of the evaporator tube suddenly expands, the fluid speed suddenly drops, the phenomenon of insufficient expansion supersonic jet flow can occur in the evaporation tube, and the intense mixing of the gas phase and the liquid phase excites strong jet flow noise and bubbling sound, thereby seriously affecting the silent experience of the refrigeration equipment.
Disclosure of Invention
The application provides a fluid pipeline assembly and refrigeration equipment, which are used for solving the problem of noise caused by sudden speed drop of fluid flowing into an evaporation pipe from a capillary pipe.
In order to solve the technical problems, the application adopts a technical scheme that: a fluid conduit assembly comprising: a capillary tube; the output end of the evaporation tube is connected with the evaporator; the gradually-expanding pipe is connected with the liquid outlet end of the capillary tube and the input end of the evaporation pipe, and comprises a first number of transition pipe sections and connecting pipe sections for connecting two adjacent transition pipe sections, and the inner diameters of the first number of transition pipe sections are sequentially increased along the direction from the liquid outlet end of the capillary tube to the input end of the evaporation pipe; the first number of transition pipe sections comprise an inlet transition pipe section connected with the capillary tube, an outlet transition pipe section connected with the evaporation pipe and a sub-transition pipe section positioned between the inlet transition pipe section and the outlet transition pipe section, and the reduction ratio of the inlet transition pipe section to the adjacent sub-transition pipe sections of the inlet transition pipe section is greater than 1 and less than or equal to 2.
According to one embodiment of the application, the reduction ratios of the transition pipe sections of two adjacent stages are the same, the square of the first pipe diameter ratio is equal to the second number of reduction ratios of the transition pipe sections of two adjacent stages, the first number is the nearest integer of the second number plus one, and the first pipe diameter ratio is the pipe diameter ratio of the input end of the evaporator to the liquid outlet end of the capillary.
According to an embodiment of the application, the reduction ratio of the inlet transition pipe section and the adjacent sub-transition pipe sections is smaller than the reduction ratio of the rest of the adjacent two-stage transition pipe sections.
According to one embodiment of the application, the reduction ratio of each two adjacent stages of transition pipe sections outside the inlet transition pipe section is more than 1 and less than or equal to 5.
According to an embodiment of the application, the length of each sub-transition section is gradually shortened in the direction from the inlet transition section to the outlet transition section.
According to one embodiment of the application, the length of each sub-transition pipe section is greater than or equal to 30mm and less than or equal to 80mm.
According to an embodiment of the application, the length of the sub-transition sections connecting the inlet transition sections is 70mm or more and 80mm or less.
According to an embodiment of the present application, the first number is equal to or greater than 4 and equal to or less than 6.
According to one embodiment of the present application, the inner diameter of the input end of the joined pipe section is equal to the inner diameter of the previous transition pipe section, the inner diameter of the output end of the joined pipe section is equal to the inner diameter of the next transition pipe section, and the inner diameter of the joined pipe section gradually increases from the input end of the joined pipe section to the output end of the joined pipe section.
According to one embodiment of the present application, the joint pipe section is a tapered pipe, and an angle between a peripheral wall of the joint pipe section and an axial direction of the joint pipe section is 20 ° or less.
According to one embodiment of the application, the ratio of the flow cross-sectional area of the inlet transition pipe section to the flow cross-sectional area of the liquid outlet end of the capillary is greater than or equal to 1 and less than or equal to 2; and/or the ratio of the flow cross section of the input end of the evaporation tube to the flow cross section of the outlet transition tube section is more than or equal to 1 and less than or equal to 2.
In order to solve the technical problems, the application adopts another technical scheme that: a refrigeration appliance comprising: a body; any of the above fluid conduit assemblies may be disposed within the body.
The beneficial effects of the application are as follows: the capillary tube and the evaporation tube are connected through the gradually-expanding tube, the inner diameter of each transition tube section of the gradually-expanding tube gradually increases along the liquid outlet end of the capillary tube to the input end of the evaporation tube, the fluid velocity flowing out of the capillary tube gradually decreases in the gradually-expanding tube and then flows into the evaporation tube, the sudden drop of the fluid velocity caused by the sudden increase of the pipeline flow area from the capillary tube to the evaporation tube is avoided, jet noise and bubbling sound caused by insufficient expanded supersonic jet are avoided, and the mute experience of the fluid pipeline assembly and the refrigerating equipment using the fluid pipeline assembly is improved. In addition, the reduction ratio design of the inlet transition section and the sub-transition section connecting the inlet transition section is particularly important because of the relatively high velocity of the fluid entering the diverging pipe. Through setting the speed reduction ratio of the inlet transition pipe section and the sub-transition pipe section connected with the inlet transition pipe section to be more than 1 and less than or equal to 2, the speed reduction of fluid can be prevented from happening between the inlet transition pipe section and the sub-transition pipe section connected with the inlet transition pipe section, thereby avoiding jet flow generated by excessively rapid speed reduction and further reducing noise generated by fluid flowing in the gradually-expanding pipe.
Drawings
For a clearer description of the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a schematic cross-sectional view of an embodiment of a fluid conduit assembly of the present application;
FIG. 2 is a schematic cross-sectional view of yet another embodiment of a fluid conduit assembly of the present application;
FIG. 3 is a schematic illustration of the connection of a capillary tube and a diverging tube of an embodiment of a fluid conduit assembly of the present application;
fig. 4 is a schematic view showing a connection structure of a divergent pipe and an evaporation pipe of an embodiment of the fluid pipe assembly according to the present application.
In the figure: 100. a fluid conduit assembly; 110. a capillary tube; 120. an evaporation tube; 130. a gradually expanding pipe; 133. a first end; 134. a second end; 131. a transition pipe section; 1311. an inlet transition section; 1312. a sub-transition pipe section; 1313. an outlet transition section; 132. joining the pipe sections; 140. a first sleeve; 150. a second sleeve; 160. a first buffer section; 170. and a second buffer section.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a fluid conduit assembly according to an embodiment of the application.
An embodiment of the present application provides a fluid conduit assembly 100. The fluid conduit assembly 100 includes a capillary tube 110, an evaporation tube 120, and a diverging tube 130. Wherein the output end of the evaporation tube 120 is used for being connected with an evaporator. The input end of the gradually expanding pipe 130 is connected with the liquid outlet end of the capillary tube 110, and the output end of the gradually expanding pipe 130 is connected with the input end of the evaporating pipe 120. The diverging pipe 130 includes a first number of transition pipe segments 131 and a junction pipe segment 132 connecting adjacent two transition pipe segments 131. The first number of transition tube segments 131 increases in inner diameter sequentially in the direction from the outlet end of the capillary tube 110 to the inlet end of the evaporator tube 120. And, the first number of transition pieces 131 includes an inlet transition piece 1311 connected to the capillary tube 110, an outlet transition piece 1313 connected to the evaporator, and a sub-transition piece 1312 located between the inlet transition piece 1311 and the outlet transition piece 1313. The reduction ratio of the inlet transition section 1311 to the sub-transition section 1312 of the adjacent inlet transition section 1311 is greater than 1 and less than or equal to 2.
By arranging the gradually-expanding tube 130 to connect the capillary tube 110 and the evaporating tube 120, and gradually increasing the inner diameter of each transition tube segment 131 of the gradually-expanding tube 130 along the liquid outlet end of the capillary tube 110 to the input end of the evaporating tube 120, the fluid velocity flowing out of the capillary tube 110 gradually decreases in the gradually-expanding tube 130 and then flows into the evaporating tube 120, so that the fluid velocity suddenly decreases caused by the sudden increase of the pipeline flow area from the capillary tube 110 to the evaporating tube 120, jet noise and bubbling sound caused by insufficient expanded supersonic jet are avoided, and the mute experience of the fluid pipeline assembly 100 and the refrigerating equipment using the fluid pipeline assembly 100 is improved. In addition, the reduction ratio design of the inlet transition section 1311 and the sub-transition section 1312 of the adjacent inlet transition section 1311 is particularly important because of the relatively high velocity of the fluid entering the diverging pipe 130. By setting the reduction ratio of the inlet transition pipe section 1311 to the sub-transition pipe sections 1312 of the adjacent inlet transition pipe section 1311 to be greater than 1 and less than or equal to 2, it is possible to ensure that no fluid velocity dip occurs between the inlet transition pipe section 1311 and the sub-transition pipe sections 1312 of the adjacent inlet transition pipe section 1311, thereby avoiding the generation of jet flow due to excessive deceleration, and further reducing noise generated by the flow of fluid in the diverging pipe 130.
As shown in fig. 1, the reduction ratio of the inlet transition segment 1311 to the sub-transition segment 1312 connecting the inlet transition segment 1311 is set to be greater than 1 and less than or equal to 2. For example, the reduction ratio of the inlet transition section 1311 and the sub-transition section 1312 of an adjacent inlet transition section 1311 may be 1.1, 1.35, 1.414, 1.5, 1.62, 1.732, or 2, etc. When the reduction ratio of the inlet transition section 1311 and the sub-transition section 1312 of the adjacent inlet transition section 1311 is 2, the fluid velocity in the sub-transition section 1312 of the adjacent inlet transition section 1311 is reduced to 1/2 of the fluid velocity in the inlet transition section 1311, the pipe cross-sectional area of the sub-transition section 1312 of the adjacent inlet transition section 1311 is 2 times the pipe cross-sectional area of the inlet transition section 1311, and the radius of the sub-transition section 1312 of the adjacent inlet transition section 1311 is the radius of the inlet transition section 1311About 1.414 times.
The reduction ratio of the inlet transition piece 1311 and the sub-transition piece 1312 connecting the inlet transition piece 1311 is the ratio of the flow rate of the fluid in the inlet transition piece 1311 and the flow rate of the fluid in the sub-transition piece 1312 connecting the inlet transition piece 1311. The reduction ratio is the inverse of the ratio of the pipeline cross-sectional areas.
In some embodiments, the reduction ratio m of each adjacent two-stage transition pipe segment 131 is the same. First pipe diameter ratioSquare (dp 2/dp 1) 2 Equal to the second number x of reduction ratios m of adjacent two-stage transition pipe segments 131. The first number n is the nearest integer of the second number x plus one, and the first pipe diameter ratio (dp 2/dp 1) is the pipe diameter ratio of the input end dp2 of the evaporator to the output end dp1 of the capillary 110. The specific formula is as follows: (dp 2/dp 1) 2 ＝m x X=n-1; alternatively, the value may be converted into (dp 2/dp 1) for the convenience of calculation and value taking 2 ≈m n-1 N is the nearest integer.
By setting the reduction ratios of the adjacent two-stage transition pipe sections 131 to be the same, and in a reasonable range, each stage of transition pipe section 131 can play a good role in reducing the fluid speed, obvious turbulence disturbance does not occur in the fluid flowing in the divergent pipe 130, and more excellent gradual speed reduction can be realized, so that jet noise can be effectively restrained. By selecting a reasonable reduction ratio of each adjacent two-stage transition pipe segment 131, a reasonable number of transition pipe segments 131 can be designed according to the first pipe diameter ratio, so that the fluid is ensured to realize sufficient gradual speed reduction in the gradually expanding pipe 130.
In some embodiments, the reduction ratio m of each adjacent two-stage transition segment 131 may also be different. Because of the relatively high velocity of the fluid entering the diverging pipe 130, the reduction ratio of the inlet transition pipe section 1311 and the adjacent sub-transition pipe sections 1312 is less than the reduction ratio of the remaining adjacent two-stage transition pipe sections 131 in order to avoid jet noise caused by excessive velocity drops of the fluid as the inlet transition pipe section 1311 flows into the sub-transition pipe sections 1312 of the adjacent inlet transition pipe section 1311. So that when fluid enters the adjacent sub-transition sections 1312 from the inlet transition section 1311 at a higher velocity, it can be decelerated at a smaller deceleration ratio, avoiding the occurrence of jet flow due to rapid velocity drop while achieving deceleration purposes; the reduction ratio can be properly increased in the rest two adjacent transition pipe sections 131, the fluid speed is lower at this time, the reduction amount corresponding to the increase of the reduction ratio is limited, and jet flow is not easy to be generated due to the sudden drop of the fluid speed. Specifically, the reduction ratio of each adjacent two-stage transition pipe segment 131 other than the inlet transition pipe segment 1311 is greater than 1 and less than or equal to 5, for example, the reduction ratio of each adjacent two-stage transition pipe segment 131 is 1.5, 2.2, 3.7, 4.5, 5, or the like.
Wherein the first pipe diameter ratio is flatSquare (dp 2/dp 1) 2 Equal to the product of the reduction ratios of the two-stage transition pipe segments 131. The first pipe diameter ratio (dp 2/dp 1) is the pipe diameter ratio of the input dp2 of the evaporator to the output dp1 of the capillary 110. The specific formula is as follows: (dp 2/dp 1) 2 ＝m 1 ×m 2 ×…m i …×m n-1 For easy calculation and value, the square of the first pipe diameter ratio (dp 2/dp 1) 2 May be approximately equal to the product of the reduction ratios of the two-stage transition segments 131, i.e., (dp 2/dp 1) 2 ≈m 1 ×m 2 ×…m i …×m n-1 。
By selecting a reasonable reduction ratio of the inlet transition pipe segment 1311 and the sub-transition pipe segment 1312 of the adjacent inlet transition pipe segment 1311, and combining the reduction ratios of the remaining adjacent two-stage transition pipe segments 131, a reasonable number of transition pipe segments 131 can be designed according to the first pipe diameter ratio, ensuring that the fluid achieves sufficient gradual deceleration in the diverging pipe 130.
In some embodiments, as shown in fig. 1, the first number is greater than or equal to 4 and less than or equal to 6, i.e., the total number of inlet transition segment 1311, outlet transition segment 1313 connecting evaporator tube 120, and sub-transition segments 1312 located between inlet transition segment 1311 and outlet transition segment 1313 is greater than or equal to 4 and less than or equal to 6, e.g., 4, 5, or 6. Through the first number of transition pipe segments 131, the diverging pipe 130 may achieve a gradual deceleration.
In some embodiments, as shown in fig. 1, each sub-transition section 1312 tapers in length in the direction of the inlet transition section 1311 to the outlet transition section 1313. As the fluid flows within the diverging tube 130, the velocity gradually decreases, with the fluid velocity being faster near the inlet transition tube segment 1311 and slower near the outlet transition tube segment 1313, it will be appreciated that the flow path required for the fluid to fully expand and decrease is longer as the fluid velocity is faster. By gradually shortening the length of each sub-transition segment 1312 in the direction from the inlet transition segment 1311 to the outlet transition segment 1313, a longer flow path for expansion and deceleration is provided for the fluid at a faster rate, and the flow path for expansion and deceleration is gradually shortened when the fluid rate is gradually reduced, thereby ensuring sufficient expansion and deceleration of the fluid in each stage of transition segment 131 and avoiding excessive length of the diverging tube 130. Therefore, by reasonably designing the length of the transition pipe section 131, the gradually-expanding pipe 130 has a better step-by-step deceleration effect, vortex shedding and noise caused by unreasonable length design are effectively avoided, and the fluid is ensured to fully generate at the outlet of each stage of transition pipe section 131 to form a stable flow field.
Specifically, each of the sub-transition pipe sections 1312 has a length of 30mm or more and 80mm or less, for example, 30mm, 46mm, 55mm, 68mm, 70mm, 80mm, or the like. In the diverging pipe 130, when the fluid flows from the inlet transition pipe section 1311 to the sub-transition pipe sections 1312 of the adjacent inlet transition pipe section 1311, the fluid is decelerated for the first time and is fast, so that the length of the sub-transition pipe sections 1312 of the adjacent inlet transition pipe section 1311 needs to be relatively longer than that of the rest of the sub-transition pipe sections 1312. The length of the sub-transition sections 1312 of adjacent inlet transition sections 1311 is 70mm or more and 80mm or less, such as 70mm, 73mm, 77mm, 80mm, or the like.
In order to make the connection between the transition pipe sections 131 smooth, the inner diameter of the input end of the connection pipe section 132 is equal to the inner diameter of the previous transition pipe section 131, and the inner diameter of the output end of the connection pipe section 132 is equal to the inner diameter of the subsequent transition pipe section 131. The inside diameter of the adapter tube segment 132 increases gradually from the input end of the adapter tube segment 132 to the output end of the adapter tube segment 132. Thus, each transition pipe segment 131 is smooth and free of bending, when fluid flows from the previous transition pipe segment 131 into the adjacent next transition pipe segment 131 through the connecting pipe segment 132, the fluid can smoothly pass through and fully expand, no obvious turbulence disturbance occurs, and the fluid has obvious advantages in suppressing jet noise. The fluid flow in the divergent pipe 130 of the application shows smooth streamline shape, no obvious turbulence disturbance occurs, better step-by-step deceleration can be realized, the flow field performance is obviously better than other pipe structures, and the application has obvious advantages in the aspect of restraining jet noise.
Further, the joint pipe section 132 is a tapered pipe, and an angle between a peripheral wall of the joint pipe section 132 and an axial direction of the joint pipe section 132 is 20 ° or less, for example, 20 °, 18 °, 15 °, 9 °, 5 °, or the like. The expansion trend of the joint pipe section 132 is gentle, so that the fluid can be gradually expanded and slowed down along the peripheral wall of the joint pipe section 132, and the speed of the fluid is reduced, thereby avoiding jet flow generated by excessively rapid speed reduction, and further reducing noise generated by the fluid flowing in the gradual expansion pipe 130.
The transition pipe 131 is a linear pipe having a constant diameter in the axial direction. Of course, in some embodiments, the diameter of the transition tube segment 131 may vary in the axial direction at a rate less than the rate of change of the diameter of the mating tube segment 132 in the axial direction. The rate of change of the diameter of the transition pipe 131 along the axial direction is required to be sufficient for expansion of the fluid, and smooth and difficult disturbance of the fluid flow.
With continued reference to fig. 2, fig. 2 is a schematic cross-sectional view of a fluid conduit assembly according to another embodiment of the present application. In some embodiments, when the transition pipe segment 131 has at least four stages, the engagement pipe segment 132 correspondingly has at least three stages. The length of the piping of the first two-stage joint pipe section 132 is 10mm or more, for example, 10mm, 12mm, 15mm or the like. When the fluid flows into the latter two-stage transition pipe segment 131, the fluid flow rate is sufficiently reduced, the length of the last stage joint pipe segment 132 is appropriately increased, and the inner diameter of the output end of the last stage joint pipe segment 132 is appropriately increased to reduce the number of stages of the transition pipe segment 131. Specifically, the length of the last stage splice tube segment 132 is 50mm or greater, such as 50mm, 54mm, 60mm, 63mm, or the like. The inner diameter of the input end of the last stage of connecting pipe section 132 is required to be equal to the inner diameter of the previous transition pipe section 131, and the inner diameter of the output end of the last stage of connecting pipe section 132 is adjusted according to the actual working condition, so that the method has high self-adaptability.
It should be noted that, the axis of the diverging pipe 130 may be linear, or the axis of the diverging pipe 130 may be curved according to the installation condition, but it is required to ensure that the transition pipe sections 131 at each stage are smooth and have no bending.
Specifically, the diverging pipe 130 may be integrally extruded by a die, or the diverging pipe 130 may be formed by step-by-step extrusion welding, which only needs to ensure that the inner diameters of the joints of the transition pipe segment 131 and the joint pipe segment 132 are the same. Further, the wall thickness of each transition segment 131 and the junction segment 132 is the same.
In some embodiments, the diverging tube 130 includes oppositely disposed first and second ends 133, 134. The first end 133 is connected to the liquid outlet end of the capillary tube 110, and a ratio of a flow cross-sectional area of the first end 133 to a flow cross-sectional area of the liquid outlet end of the capillary tube 110 is greater than or equal to 1 and less than or equal to 2, for example, a ratio of the flow cross-sectional area of the first end 133 to the flow cross-sectional area of the liquid outlet end of the capillary tube 110 is 1, 1.3, 1.5, 1.7, or 2.
In the prior art, the capillary tube 110 is usually inserted directly into the evaporation tube 120, and if the diverging tube 130 is provided, the capillary tube 110 is also inserted directly into the diverging tube 130. As fluid flows from capillary tube 110 into diverging tube 130, the flow area of the tube increases by a factor of at least 9, which in turn results in a velocity dip (at least a factor of 9 reduction) and the resulting insufficiently expanded supersonic jet creating jet noise. In the application, the ratio of the flow cross-sectional area of the first end 133 to the flow cross-sectional area of the liquid outlet end of the capillary tube 110 is greater than or equal to 1 and less than or equal to 2, so that the change of the flow cross-sectional area between the capillary tube 110 and the gradually-expanding tube 130 is ensured to be within a reasonable range, the sudden drop of the fluid speed between the capillary tube 110 and the gradually-expanding tube 130 is avoided, jet noise and bubbling sound generated by insufficient expanded supersonic jet caused by the sudden drop of the fluid speed are avoided, vortex shedding noise is inhibited, the connection strength of the capillary tube 110 and the gradually-expanding tube 130 is improved, and the mute experience of the fluid pipeline assembly 100 and the refrigerating equipment using the fluid pipeline assembly 100 in the embodiment of the application is improved.
The projection of the flow cross section of the liquid outlet end of the capillary tube 110 along the axial direction is located in the flow cross section of the first end 133. So that fluid flowing out of the outlet end of the capillary tube 110 can smoothly flow into the first end 133 of the diverging tube 130.
Specifically, the cross-sectional flow area of the first end 133 of the diverging tube 130 is equal to the cross-sectional flow area of the capillary tube 110. The fluid in the capillary tube 110 can smoothly flow into the diverging tube 130, the connection between the capillary tube 110 and the diverging tube 130 does not slow down the fluid, the connection strength of the capillary tube 110 and the diverging tube 130 is ensured, and the noise generated at the connection between the capillary tube 110 and the diverging tube 130 is avoided.
In some embodiments, the liquid outlet end of the capillary tube 110 abuts the first end 133, and the liquid outlet end of the capillary tube 110 is spaced from the first end 133 by 0.5mm or less, such as 0.5mm, 0.4mm, 0.25mm, or 0.1 mm. By abutting the capillary tube 110 with the first end 133, smooth flow of the fluid from the capillary tube 110 to the diverging tube 130 can be ensured, and noise generated when the fluid flows through due to an oversized gap between the liquid outlet end of the capillary tube 110 and the first end 133 of the diverging tube 130 is avoided.
In some embodiments, the fluid conduit assembly 100 further includes a first sleeve 140. The first sleeve 140 is sleeved and fixed outside the junction of the liquid outlet end of the capillary tube 110 and the first end 133 of the diverging tube 130. By providing the first sleeve 140, the capillary tube 110 and the first end 133 may be securely fastened to prevent leakage of fluid from between the capillary tube 110 and the diverging tube 130. The spacing between the first sleeve 140 and the capillary tube 110 and the diverging tube 130 is less than or equal to 0.2mm, such as 0.2mm, 0.1mm, or 0.05mm, etc. The first sleeve 140 is tightly coupled to the capillary tube 110 and the diverging tube 130 to avoid fluid leakage. The length of the first sleeve 140 is 10mm or more, for example, 10mm, 12mm, 15mm, or the like, so that the first sleeve 140 has a sufficient length to be connected with the capillary tube 110 and the diverging tube 130, respectively, to ensure the connection reliability of the first sleeve 140 with the capillary tube 110 and the diverging tube 130.
Wherein the first sleeve 140 may be sealingly connected to the capillary tube 110 and the diverging tube 130, respectively, by welding or cementing. In addition, when the first sleeve 140 is welded to the capillary tube 110 and the divergent tube 130, the air tightness is required to be ensured, and welding defects such as air holes, slag inclusion, cracks, unfused welding, undercut and the like are avoided. The outer diameters of the capillary tube 110 and the diverging tube 130 may be uniform and the first sleeve 140 may be linear.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating a connection structure of a capillary tube and a divergent tube according to an embodiment of the present application. To further avoid rapid dip in fluid flowing from the capillary tube 110 into the diverging tube 130, the fluid conduit assembly 100 further includes a first buffer section 160, where the first buffer section 160 is disposed at the junction of the capillary tube 110 and the first end 133, when the cross-sectional flow area of the first end 133 of the diverging tube 130 is greater than the cross-sectional flow area of the outlet end of the capillary tube 110. The cross-sectional flow area of the input end of the first buffer section 160 is equal to the cross-sectional flow area of the output end of the capillary tube 110, and the cross-sectional flow area of the output end of the first buffer section 160 is equal to the cross-sectional flow area of the first end 133. The cross-sectional flow area of the first buffer section 160 gradually increases from the capillary tube 110 to the diverging tube 130. Thus, when the fluid flows from the capillary tube 110 to the diverging tube 130, the fluid can smoothly pass through and expand sufficiently without significant turbulence disturbance, with significant advantages in suppressing jet noise.
Specifically, the inner diameter of the input end of the first buffer section 160 is equal to the inner diameter of the liquid outlet end of the capillary tube 110, and the inner diameter of the output end of the first buffer section 160 is equal to the inner diameter of the first end 133.
The first buffer section 160 may be disposed in the liquid outlet end of the capillary tube 110, and the inner wall of the liquid outlet end of the capillary tube 110 forms a wedge-shaped surface facing the diverging tube 130, where the first buffer section 160 is the wedge-shaped surface. Alternatively, the first buffer section 160 may be disposed in the first end 133 of the diverging pipe 130, where the inner wall of the first end 133 forms a buffer surface protruding away from the capillary 110, and the first buffer section 160 is the buffer surface. Alternatively, the first buffer section 160 may be disposed between the capillary tube 110 and the diverging tube 130, where the first buffer section 160 is a conical tube, one end of the first buffer section 160 abuts against the capillary tube 110, the other end abuts against the diverging tube 130, and the first buffer section 160 may be integrally formed with the capillary tube 110 or the diverging tube 130.
In some embodiments, the fluid conduit assembly 100 further includes an evaporator tube 120. The input end of the evaporator tube 120 is connected to the second end 134. The ratio of the cross-sectional flow area of the input end of the evaporator tube 120 to the cross-sectional flow area of the second end 134 is greater than or equal to 1 and less than or equal to 2. For example, the ratio of the cross-sectional flow area at the input end of the evaporator tube 120 to the cross-sectional flow area at the second end 134 is 1, 1.3, 1.5, 1.7, 2, or the like.
Since the ratio of the cross-sectional flow area of the input end of the evaporating tube 120 to the cross-sectional flow area of the second end 134 is set to be greater than or equal to 1 and less than or equal to 2, the cross-sectional flow area between the diverging tube 130 and the evaporating tube 120 is ensured to be changed within a reasonable range, the sudden drop of the fluid velocity between the diverging tube 130 and the evaporating tube 120 is avoided, jet noise and bubbling sound caused by insufficient expansion of the ultrasonic jet are avoided, vortex shedding noise is inhibited, the connection strength of the evaporating tube 120 and the diverging tube 130 is improved, and the mute experience of the fluid pipeline assembly 100 and the refrigerating equipment using the fluid pipeline assembly 100 in the embodiment of the application is improved.
The projection of the flow cross section of the second end 134 along the axial direction is located in the flow cross section of the input end of the evaporation tube 120. So that fluid exiting the second end 134 of the diverging tube 130 may smoothly flow into the input end of the evaporator tube 120.
Specifically, the cross-sectional flow area of the second end 134 of the diverging tube 130 is equal to the cross-sectional flow area of the input end of the evaporator tube 120. The fluid in the gradually-expanding tube 130 can smoothly flow into the evaporating tube 120, the connection position of the evaporating tube 120 and the gradually-expanding tube 130 does not slow down the fluid, the connection strength of the evaporating tube 120 and the gradually-expanding tube 130 is ensured, and the noise generated at the connection position of the evaporating tube 120 and the gradually-expanding tube 130 is avoided.
In some embodiments, the input end of the evaporator tube 120 abuts the second end 134, and the distance between the input end of the evaporator tube 120 and the second end 134 is less than 0.5mm, such as 0.5mm, 0.4mm, 0.25mm, or 0.1mm, etc. By abutting the evaporation tube 120 with the second end 134, smooth flow of the fluid from the divergent tube 130 to the evaporation tube 120 can be ensured, and noise generated when the fluid flows through due to an excessive gap between the second end 134 of the divergent tube 130 and the input end of the evaporation tube 120 is avoided.
In some embodiments, the fluid conduit assembly 100 further includes a second sleeve 150, the second sleeve 150 being secured over the exterior of the junction of the input end of the evaporator tube 120 and the second end 134 of the diverging tube 130. By providing the second sleeve 150, the evaporator tube 120 and the second end 134 may be securely fastened to prevent leakage of fluid from between the diverging tube 130 and the evaporator tube 120. The second sleeve 150 is spaced from the diverging 130 and evaporating 120 tubes by 0.2mm or less, such as 0.2mm, 0.1mm, or 0.05 mm. The second sleeve 150 is tightly coupled to the diverging tube 130 and the evaporating tube 120 to avoid fluid leakage. The length of the second sleeve 150 is 10mm or more, for example, 10mm, 12mm, 15mm, etc., so that the second sleeve 150 has a sufficient length to be connected with the diverging pipe 130 and the evaporating pipe 120, respectively, ensuring the connection reliability of the second sleeve 150 with the diverging pipe 130 and the evaporating pipe 120.
Wherein the second sleeve 150 may be sealingly connected to the evaporator tube 120 and the diverging tube 130, respectively, by welding or cementing. In addition, when the second sleeve 150 is welded to the evaporation tube 120 and the gradual expansion tube 130, the air tightness is required to be ensured, and welding defects such as air holes, slag inclusion, cracks, unfused edges and the like are avoided. The outer diameters of the evaporating pipe 120 and the diverging pipe 130 may be uniform and the second sleeve 150 may be linear.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating a connection structure of a divergent pipe and an evaporation pipe of an embodiment of a fluid pipeline assembly according to the present application. To further avoid rapid dip in fluid flowing from the diverging tube 130 into the evaporator tube 120, the fluid conduit assembly 100 further includes a second buffer segment 170 disposed at the junction of the evaporator tube 120 and the second end 134 when the cross-sectional flow area of the evaporator tube 120 is greater than the cross-sectional flow area of the second end 134 of the diverging tube 130. The cross-sectional flow area of the input end of the second buffer section 170 is equal to the cross-sectional flow area of the second end 134, and the cross-sectional flow area of the output end of the second buffer section 170 is equal to the cross-sectional flow area of the input end of the evaporator tube 120. The cross-sectional flow area of the second buffer segment 170 gradually increases from the diverging tube 130 to the evaporating tube 120. Thus, when the fluid flows from the diverging tube 130 to the evaporating tube 120, the fluid can smoothly pass through and expand sufficiently without significant turbulence disturbance, which is a significant advantage in suppressing jet noise.
Specifically, the inner diameter of the input end of the second buffer section 170 is equal to the inner diameter of the second end 134 of the diverging tube 130, and the inner diameter of the output end of the second buffer section 170 is equal to the inner diameter of the input end of the evaporating tube 120.
The second buffer section 170 may be disposed in the second end 134 of the diverging tube 130, where an inner wall of the second end 134 forms a wedge-shaped surface facing the evaporation tube 120, and the second buffer section 170 is the wedge-shaped surface. Alternatively, the second buffer section 170 may be disposed in the evaporation tube 120, where the inner wall of the input end of the evaporation tube 120 forms a buffer surface protruding away from the diverging tube 130, and the second buffer section 170 is the buffer surface. Alternatively, the second buffer section 170 may be disposed between the diverging tube 130 and the evaporating tube 120, where the second buffer section 170 is a conical tube, one end of the second buffer section 170 abuts against the diverging tube 130, the other end abuts against the evaporating tube 120, and the second buffer section 170 may be integrally formed with the diverging tube 130 or the evaporating tube 120.
A further embodiment of the present application provides a refrigeration appliance including a body and a fluid conduit assembly 100 according to any of the above embodiments. The fluid conduit assembly 100 is disposed within the body. The fluid conduit assembly 100 includes a capillary tube 110, an evaporation tube 120, and a diverging tube 130. Wherein the output end of the evaporation tube 120 is used for being connected with an evaporator. The input end of the gradually expanding pipe 130 is connected with the liquid outlet end of the capillary tube 110, and the output end of the gradually expanding pipe 130 is connected with the input end of the evaporating pipe 120. The diverging pipe 130 includes a first number of transition pipe segments 131 and a junction pipe segment 132 connecting adjacent two transition pipe segments 131. The first number of transition tube segments 131 increases in inner diameter sequentially in the direction from the outlet end of the capillary tube 110 to the inlet end of the evaporator tube 120. And, the first number of transition pieces 131 includes an inlet transition piece 1311 connected to the capillary tube 110, an outlet transition piece 1313 connected to the evaporator, and a sub-transition piece 1312 located between the inlet transition piece 1311 and the outlet transition piece 1313. The reduction ratio of the inlet transition section 1311 to the sub-transition section 1312 connecting the inlet transition section 1311 is greater than 1 and less than or equal to 2.
Through setting up the divergent pipe 130 and connecting capillary 110 and evaporating pipe 120, and the internal diameter of each transition pipe section 131 of divergent pipe 130 increases gradually along the play liquid end of capillary 110 to evaporating pipe 120's input, the fluid velocity who flows out in capillary 110 flows into evaporating pipe 120 after gradually reducing in divergent pipe 130, avoid capillary 110 to evaporating pipe 120's pipeline flow area to increase suddenly and the fluid velocity who leads to suddenly drop, and then avoid the insufficient supersonic jet that expands that causes to produce jet noise and bubble sound from this, promote refrigeration plant's silence experience. In addition, the reduction ratio design of the inlet transition section 1311 and the sub-transition section 1312 connecting the inlet transition section 1311 is particularly important because of the relatively high velocity of the fluid entering the diverging pipe 130. By setting the reduction ratio of the inlet transition pipe section 1311 to the sub-transition pipe section 1312 connecting the inlet transition pipe section 1311 to be greater than 1 and less than or equal to 2, it is possible to ensure that no fluid velocity dip occurs between the inlet transition pipe section 1311 and the sub-transition pipe section 1312 connecting the inlet transition pipe section 1311, thereby avoiding the generation of jet flow due to excessive deceleration, and further reducing noise generated by the flow of fluid in the diverging pipe 130.
The terms "first", "second", "third" in the present application are used for descriptive purposes only and are not to be construed as indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. All directional indications (such as up, down, left, right, front, back … …) in embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular gesture (as shown in the drawings), and if the particular gesture changes, the directional indication changes accordingly. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. A process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.
The foregoing description is only illustrative of the present application and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present application.

Claims (12)

1. A fluid conduit assembly, comprising:
a capillary tube;
the output end of the evaporation tube is connected with the evaporator;
the gradually-expanding pipe is connected with the liquid outlet end of the capillary tube and the input end of the evaporation pipe, and comprises a first number of transition pipe sections and connecting pipe sections for connecting two adjacent transition pipe sections, and the inner diameters of the first number of transition pipe sections are sequentially increased along the direction from the liquid outlet end of the capillary tube to the input end of the evaporation pipe;
the first number of transition pipe sections comprise an inlet transition pipe section connected with the capillary tube, an outlet transition pipe section connected with the evaporation pipe and a sub-transition pipe section positioned between the inlet transition pipe section and the outlet transition pipe section, and the reduction ratio of the inlet transition pipe section to the adjacent sub-transition pipe sections of the inlet transition pipe section is greater than 1 and less than or equal to 2.
2. The fluid conduit assembly of claim 1, wherein the reduction ratios of the transition sections of each adjacent two stages are the same, the square of the first pipe diameter ratio is equal to the square of the second number of reduction ratios of the transition sections of the adjacent two stages, the first number is the nearest integer of the second number plus one, and the first pipe diameter ratio is the pipe diameter ratio of the input end of the evaporator to the output end of the capillary.
3. The fluid conduit assembly of claim 1, wherein the reduction ratio of the inlet transition section and adjacent sub-transition sections is less than the reduction ratio of the remaining adjacent two-stage transition sections.
4. A fluid conduit assembly according to claim 3, wherein the reduction ratio of each adjacent two stages of said transition sections beyond said inlet transition section is greater than 1 and less than or equal to 5.
5. The fluid conduit assembly of claim 1, wherein each of the sub-transition sections is tapered in length in a direction from the inlet transition section to the outlet transition section.
6. The fluid conduit assembly of claim 1, wherein each of the sub-transition sections has a length of 30mm or greater and 80mm or less.
7. The fluid conduit assembly of claim 1, wherein the length of the sub-transition sections connecting the inlet transition sections is 70mm or more and 80mm or less.
8. The fluid conduit assembly of any one of claims 1, wherein the first number is 4 or greater and 6 or less.
9. The fluid conduit assembly of claim 1, wherein the inner diameter of the input end of the joined pipe section is equal to the inner diameter of the previous transition pipe section and the inner diameter of the output end of the joined pipe section is equal to the inner diameter of the subsequent transition pipe section, the inner diameter of the joined pipe section gradually increasing from the input end of the joined pipe section to the output end of the joined pipe section.
10. The fluid conduit assembly of claim 9, wherein the engagement tube segment is a tapered tube, and wherein the circumferential wall of the engagement tube segment is at an angle of 20 ° or less with respect to the axial direction of the engagement tube segment.
11. The fluid conduit assembly of claim 1, wherein the ratio of the cross-sectional flow area of the inlet transition section to the cross-sectional flow area of the outlet end of the capillary tube is greater than or equal to 1 and less than or equal to 2; and/or the ratio of the flow cross section of the input end of the evaporation tube to the flow cross section of the outlet transition tube section is more than or equal to 1 and less than or equal to 2.
12. A refrigeration appliance, comprising:
a body;
the fluid conduit assembly of any one of claims 1-11, disposed within the body.
CN202210557989.0A 2022-05-19 2022-05-19 Fluid pipeline assembly and refrigeration equipment Pending CN117128670A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210557989.0A CN117128670A (en) 2022-05-19 2022-05-19 Fluid pipeline assembly and refrigeration equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210557989.0A CN117128670A (en) 2022-05-19 2022-05-19 Fluid pipeline assembly and refrigeration equipment

Publications (1)

Publication Number Publication Date
CN117128670A true CN117128670A (en) 2023-11-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210557989.0A Pending CN117128670A (en) 2022-05-19 2022-05-19 Fluid pipeline assembly and refrigeration equipment

Country Status (1)

Country Link
CN (1) CN117128670A (en)

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