CN217685998U - Fluid pipeline assembly and refrigeration equipment - Google Patents
Fluid pipeline assembly and refrigeration equipment Download PDFInfo
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- CN217685998U CN217685998U CN202221236717.2U CN202221236717U CN217685998U CN 217685998 U CN217685998 U CN 217685998U CN 202221236717 U CN202221236717 U CN 202221236717U CN 217685998 U CN217685998 U CN 217685998U
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Abstract
The application discloses fluid pipeline subassembly and refrigeration plant. Wherein the fluid conduit assembly comprises a capillary tube and a diverging tube. The gradually expanding pipe comprises a first end and a second end which are arranged oppositely, the first end is connected with the liquid outlet end of the capillary, and the ratio of the flow sectional area of the first end to the flow sectional area of the liquid outlet end of the capillary is more than or equal to 1 and less than or equal to 2. Therefore, the change of the flow cross section area between the capillary tube and the divergent tube can be ensured to be within a reasonable range, the sudden drop of the fluid speed can not occur between the capillary tube and the divergent tube, the jet flow noise and the bubbling noise caused by the insufficiently expanded supersonic jet flow can be avoided, the vortex shedding noise can be inhibited, the connection strength of the capillary tube and the divergent tube can be improved, and the mute experience of the fluid pipeline assembly and the refrigeration equipment using the fluid pipeline assembly in the embodiment of the application can be improved.
Description
Technical Field
The application belongs to the technical field of refrigeration, and in particular 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 refrigerant is converted into a gas state in the evaporator to realize heat transfer. The flow resistance of the refrigerant increases along the length direction of the capillary tube, and when the pressure of the refrigerant is reduced to be lower than the saturated vapor pressure, the refrigerant is gasified, and the refrigerant mostly exists in a gas-liquid two-phase state. At the joint of the capillary tube and the evaporation tube of the evaporator, because the diameter of the evaporator pipeline is suddenly expanded, the phenomenon of supersonic jet flow which is not fully expanded can occur in the evaporation tube, and the gas phase and the liquid phase are mixed violently to excite strong jet flow noise and bubbling sound, thereby seriously affecting the mute experience of refrigeration equipment.
In the prior art, an expanding pipe is arranged between a capillary tube and an evaporating pipe, so that fluid flows into the evaporating pipe after being expanded through the expanding pipe. However, the inventors have long studied that, when the capillary tube is usually inserted directly into the diverging tube and fixed, and the fluid flows from the capillary tube into the diverging tube, the flow area of the tube increases abruptly, which causes a sudden drop in velocity and thus an insufficiently expanded supersonic jet to generate jet noise.
SUMMERY OF THE UTILITY MODEL
The application provides a fluid pipeline assembly and refrigeration equipment to solve the technical problem that the noise is caused by the sudden increase of the pipeline flow area at the joint of a capillary tube and a divergent tube.
In order to solve the technical problem, the application adopts a technical scheme that: a fluid conduit assembly, a capillary tube; the gradually expanding pipe comprises a first end and a second end which are oppositely arranged, the first end is connected with the liquid outlet end of the capillary, and the ratio of the flow sectional area of the first end to the flow sectional area of the liquid outlet end of the capillary is more than or equal to 1 and less than or equal to 2.
According to an embodiment of the present application, the liquid outlet end of the capillary tube is abutted to the first end, and the distance between the liquid outlet end of the capillary tube and the first end is less than or equal to 0.5mm.
According to an embodiment of the present application, the fluid conduit assembly comprises: the first sleeve is sleeved and fixed outside the joint of the liquid outlet end of the capillary tube and the first end.
According to an embodiment of the present application, the distance between the first sleeve and the capillary tube and the divergent tube is less than or equal to 0.2mm; and/or the length of the first sleeve is more than or equal to 10mm.
According to an embodiment of the present application, the fluid pipeline assembly further includes a first buffer section, the first buffer section is disposed in the capillary with the junction of the first end, the flow cross-sectional area of the first buffer section is equal to the flow cross-sectional area of the liquid outlet end of the capillary, the flow cross-sectional area of the output end of the first buffer section is equal to the flow cross-sectional area of the first end, and the flow cross-sectional area of the first buffer section is gradually increased from the capillary to the direction of the gradually expanded pipe.
According to an embodiment of the present application, the fluid conduit assembly comprises: the input end of the evaporation tube is connected with the second end, and the ratio of the flow cross-sectional area of the input end of the evaporation tube to the flow cross-sectional area of the second end is greater than or equal to 1 and less than or equal to 2.
According to an embodiment of the present application, the input end of the evaporation tube and the second end abut, and the distance between the input end of the evaporation tube and the second end is less than 0.5mm.
According to an embodiment of the present application, the fluid conduit assembly comprises: and the second sleeve is sleeved and fixed outside the joint of the input end of the evaporation tube and the second end.
According to an embodiment of the present application, the distance between the second sleeve and the evaporator tube and the expander tube is less than or equal to 0.2mm; and/or the length of the second sleeve is more than or equal to 10mm.
According to an embodiment of the present application, the divergent pipe includes a first number of transition pipe sections and a linking pipe section connecting two adjacent transition pipe sections, and inner diameters of the first number of transition pipe sections sequentially increase along a direction from a liquid outlet end of the capillary pipe to an 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 tube 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 adjacent to the inlet transition pipe section is larger than 1 and smaller than or equal to 2.
In order to solve the above technical problem, the present application adopts another technical solution: a refrigeration appliance comprising: a body; any of the above fluid conduit assemblies disposed within the body.
The beneficial effect of this application is: the ratio of the flow cross-sectional area of the first end of the divergent pipe to the flow cross-sectional area of the liquid outlet end of the capillary pipe is more 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 pipe and the divergent pipe can be ensured within a reasonable range, the sudden drop of the fluid speed between the capillary pipe and the divergent pipe can be avoided, the jet noise and the bubbling noise caused by the insufficiently expanded supersonic jet can be avoided, the vortex shedding noise can be inhibited, the connection strength of the capillary pipe and the divergent pipe can be improved, and the silent experience of the fluid pipeline assembly and the refrigeration equipment using the fluid pipeline assembly in the embodiment of the application can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that 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 inventive efforts, wherein:
FIG. 1 is a cross-sectional schematic view of an embodiment of a fluid conduit assembly of the present application;
FIG. 2 is a schematic view of a capillary tube and a flare connection of an embodiment of the fluid conduit assembly of the present application;
FIG. 3 is a schematic view of a connection structure of a divergent tube and an evaporator tube of an embodiment of the fluid conduit assembly of the present application;
FIG. 4 is a cross-sectional structural schematic view of yet another embodiment of the fluid conduit assembly of the present application.
In the figure: 100. a fluid conduit assembly; 110. a capillary tube; 120. an evaporation tube; 130. a divergent pipe; 133. a first end; 134. a second end; 131. a transition duct section; 1311. an inlet transition duct section; 1312. a sub-transition pipe section; 1313. an outlet transition duct section; 132. a connecting pipe section; 140. a first sleeve; 150. a second sleeve; 160. a first buffer section; 170. and a second buffer section.
Detailed Description
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, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase 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. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic cross-sectional view of an embodiment of a fluid conduit assembly of the present application.
An embodiment of the present application provides a fluid conduit assembly 100. The fluid conduit assembly 100 includes a capillary tube 110 and a divergent tube 130. Wherein the divergent tube 130 comprises a first end 133 and a second end 134 arranged oppositely. The first end 133 is connected to the liquid outlet end of the capillary 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 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 110 is 1, 1.3, 1.5, 1.7, or 2.
Because 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, it can be ensured that the change of the flow cross-sectional area between the capillary tube 110 and the divergent tube 130 is within a reasonable range, and a sudden drop of fluid velocity does not occur between the capillary tube 110 and the divergent tube 130, thereby preventing a jet noise and a bubbling noise caused by an insufficiently expanded supersonic jet, suppressing a vortex shedding noise, improving the connection strength of the capillary tube 110 and the divergent tube 130, and improving the silent experience of the fluid pipeline assembly 100 and the refrigeration equipment using the fluid pipeline assembly 100 of the embodiment of the present application.
The projection of the flow cross section of the liquid outlet end of the capillary 110 in the axial direction is located within the flow cross section of the first end 133. So that the fluid flowing out of the liquid outlet end of the capillary tube 110 can smoothly flow into the first end 133 of the divergent tube 130.
Specifically, the first end 133 of the diverging tube 130 has a cross-sectional flow area equal to the cross-sectional flow area of the capillary tube 110. The fluid in the capillary tube 110 can smoothly flow into the divergent tube 130, and the connection between the capillary tube 110 and the divergent tube 130 does not reduce the speed of the fluid, so as to ensure the connection strength between the capillary tube 110 and the divergent tube 130 and avoid the noise generated at the connection between the capillary tube 110 and the divergent tube 130.
In some embodiments, the liquid outlet end of the capillary 110 abuts the first end 133, and the distance between the liquid outlet end of the capillary 110 and the first end 133 is less than or equal to 0.5mm, such as 0.5mm, 0.4mm, 0.25mm, or 0.1 mm. By abutting the capillary 110 against the first end 133, the fluid can be ensured to flow smoothly from the capillary 110 to the divergent tube 130, and the noise generated when the fluid flows through due to the overlarge gap between the liquid outlet end of the capillary 110 and the first end 133 of the divergent tube 130 can be avoided.
In some embodiments, the fluid conduit assembly 100 further comprises a first sleeve 140. The first sleeve 140 is fixed to the outside of the connection between the outlet end of the capillary 110 and the first end 133 of the divergent tube 130. By providing the first sleeve 140, the capillary tube 110 and the first end 133 can be securely fixed to prevent fluid from leaking between the capillary tube 110 and the diverging tube 130. The first sleeve 140 is spaced from the capillary tube 110 and the reducer 130 by a distance of 0.2mm or less, such as 0.2mm, 0.1mm, or 0.05 mm. The first sleeve 140 is tightly connected to the capillary 110 and the divergent tube 130 to prevent fluid leakage. The length of the first sleeve 140 is greater than or equal to 10mm, for example, 10mm, 12mm, or 15mm, so that the first sleeve 140 has a sufficient length to be connected to the capillary tube 110 and the divergent tube 130, respectively, and the connection reliability of the first sleeve 140 to the capillary tube 110 and the divergent tube 130 is ensured.
Wherein, the first sleeve 140 can be connected with the capillary tube 110 and the diverging tube 130 by welding or gluing. Moreover, when the first sleeve 140 is welded to the capillary 110 and the divergent tube 130, the requirement of air tightness needs to be ensured, and welding defects such as air holes, slag inclusions, cracks, incomplete fusion, undercuts 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.
With continued reference to fig. 2, fig. 2 is a schematic view of a connection structure of a capillary tube and a divergent tube of an embodiment of the fluid conduit assembly of the present application. To further avoid the velocity collapse of the fluid flowing from the capillary tube 110 into the diverging tube 130, when the flow cross-sectional area of the first end 133 of the diverging tube 130 is larger than the flow cross-sectional area of the liquid outlet end of the capillary tube 110, the fluid conduit assembly 100 further includes a first buffer section 160, and the first buffer section 160 is disposed at the connection position of the capillary tube 110 and the first end 133. The cross-sectional flow area at the input end of the first buffer section 160 is equal to the cross-sectional flow area at the output end of the capillary 110, and the cross-sectional flow area at the output end of the first buffer section 160 is equal to the cross-sectional flow area at the first end 133. The flow cross-sectional area of the first buffer section 160 increases from the capillary tube 110 to the divergent tube 130. Therefore, when the fluid flows from the capillary tube 110 to the divergent tube 130, the fluid can smoothly pass through the divergent tube, and is fully expanded, so that no obvious turbulent disturbance occurs, and the fluid has a remarkable advantage 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 110, and a wedge-shaped surface facing the divergent tube 130 is formed on an inner wall of the liquid outlet end of the capillary 110, 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 divergent tube 130, and the inner wall of the first end 133 forms a buffer surface protruding away from the capillary tube 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, the first buffer section 160 may be a tapered 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 comprises an evaporator tube 120, an output end of the evaporator tube 120 for connection with an evaporator. The input end of the evaporation tube 120 is connected to the second end 134. The ratio of the flow cross-sectional area of the input end of the evaporation tube 120 to the flow cross-sectional area of the second end 134 is 1 or more and 2 or less. 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.
Because the ratio of the flow cross-sectional area of the input end of the evaporation tube 120 to the flow cross-sectional area of the second end 134 is set to be greater than or equal to 1 and less than or equal to 2, it can be ensured that the change of the flow cross-sectional area between the divergent tube 130 and the evaporation tube 120 is within a reasonable range, and the sudden drop of the fluid velocity between the divergent tube 130 and the evaporation tube 120 does not occur, so that jet noise and bubbling noise caused by the insufficiently expanded supersonic jet flow are avoided, vortex shedding noise is suppressed, the connection strength between the evaporation tube 120 and the divergent tube 130 is improved, and the mute experience of the fluid pipeline assembly 100 and the refrigeration equipment using the fluid pipeline assembly 100 of the embodiment of the present application is improved.
It should be noted that the projection of the flow cross section of the second end 134 in the axial direction is located within the flow cross section of the input end of the evaporator tube 120. So that the fluid flowing out of the second end 134 of the divergent tube 130 can smoothly flow into the input end of the evaporation tube 120.
Specifically, the second end 134 of the divergent tube 130 has a cross-sectional flow area equal to the cross-sectional flow area of the input end of the evaporator tube 120. The fluid in the divergent tube 130 can smoothly flow into the evaporation tube 120, and the joint of the evaporation tube 120 and the divergent tube 130 does not reduce the speed of the fluid, so that the joint strength of the evaporation tube 120 and the divergent tube 130 is ensured, and the joint of the evaporation tube 120 and the divergent tube 130 is prevented from generating noise.
In some embodiments, the input end and the second end 134 of the evaporator tube 120 abut, and the input end and the second end 134 of the evaporator tube 120 are spaced 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, the fluid can be ensured to smoothly flow from the divergent tube 130 to the evaporation tube 120, and the phenomenon that the gap between the second end 134 of the divergent tube 130 and the input end of the evaporation tube 120 is too large, which causes noise when the fluid flows through, is avoided.
In some embodiments, the fluid conduit assembly 100 further comprises a second sleeve 150, the second sleeve 150 being secured to the outside of the junction of the input end of the evaporator tube 120 and the second end 134 of the divergent tube 130. By providing the second sleeve 150, the evaporator tube 120 and the second end 134 can be securely fixed to prevent fluid leakage between the diverging tube 130 and the evaporator tube 120. The second sleeve 150 is spaced from the divergent tube 130 and the evaporator tube 120 by a distance of 0.2mm or less, such as 0.2mm, 0.1mm or 0.05 mm. The second sleeve 150 is tightly connected with the divergent tube 130 and the evaporation tube 120, so as to avoid fluid leakage. The length of the second sleeve 150 is greater than or equal to 10mm, for example, 10mm, 12mm or 15mm, so that the second sleeve 150 has a sufficient length to be connected to the divergent tube 130 and the evaporation tube 120, respectively, and the connection reliability of the second sleeve 150 to the divergent tube 130 and the evaporation tube 120 is ensured.
Wherein, the second sleeve 150 can be connected with the evaporating tube 120 and the diverging tube 130 by welding or gluing for sealing. Moreover, when the second sleeve 150 is welded to the evaporation tube 120 and the divergent tube 130, the requirement of air tightness needs to be ensured, and welding defects such as air holes, slag inclusion, cracks, incomplete fusion, undercuts and the like are avoided. The outer diameters of the evaporation tube 120 and the divergent tube 130 can be kept uniform, and the second sleeve 150 is formed in a straight line shape.
With continued reference to fig. 3, fig. 3 is a schematic view of a connection structure of the divergent tube and the evaporation tube of an embodiment of the fluid conduit assembly of the present application. To further avoid a velocity dip when the fluid flows from the diverging tube 130 to the evaporating tube 120, when the flow cross-sectional area of the evaporating tube 120 is larger than the flow cross-sectional area of the second end 134 of the diverging tube 130, the fluid conduit assembly 100 further includes a second buffer section 170, and the second buffer section 170 is disposed at the junction of the evaporating tube 120 and the second end 134. The flow cross-sectional area of the input end of the second buffer section 170 is equal to the flow cross-sectional area of the second end 134, and the flow cross-sectional area of the output end of the second buffer section 170 is equal to the flow cross-sectional area of the input end of the evaporation tube 120. The flow cross-sectional area of the second buffer section 170 is gradually increased from the diverging pipe 130 to the evaporating pipe 120. So that the fluid can smoothly pass through the divergent tube 130 and be sufficiently expanded without significant turbulent disturbance, when the fluid flows from the divergent tube 130 to the evaporation tube 120, which is a significant advantage in suppressing the 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 divergent 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 evaporation tube 120.
The second buffer section 170 may be disposed in the second end 134 of the divergent tube 130, and 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. Or, the second buffer section 170 may be disposed in the evaporation tube 120, and a buffer surface protruding away from the divergent tube 130 is formed on an inner wall of the input end of the evaporation tube 120, and the second buffer section 170 is the buffer surface. Alternatively, the second buffer section 170 may be disposed between the divergent tube 130 and the evaporation tube 120, the second buffer section 170 is a tapered tube, one end of the second buffer section 170 abuts against the divergent tube 130, the other end abuts against the evaporation tube 120, and the second buffer section 170 may be integrally formed with the divergent tube 130 or the evaporation tube 120.
In some embodiments, the divergent tube 130 comprises a first number of transition tube segments 131 and a linking tube segment 132 connecting two adjacent transition tube segments 131. The inner diameters of the first number of transition tube sections 131 increase in sequence along the direction from the liquid outlet end of the capillary tube 110 to the input end of the evaporator tube 120. Also, the first number of transition sections 131 includes an inlet transition section 1311 connecting the capillaries 110, an outlet transition section 1313 connecting the evaporators, and a sub-transition section 1312 located between the inlet and outlet transition sections 1311, 1313. The speed reduction ratio between the inlet transition pipe segment 1311 and the sub-transition pipe segment 1312 of the adjacent inlet transition pipe segment 1311 is greater than 1 and less than or equal to 2.
By arranging the divergent tube 130 to connect the capillary tube 110 and the evaporation tube 120, and by gradually increasing the inner diameter of each transition tube section 131 of the divergent tube 130 from the liquid outlet end of the capillary tube 110 to the input end of the evaporation tube 120, the speed of the fluid flowing out of the capillary tube 110 is gradually reduced in the divergent tube 130 and then flows into the evaporation tube 120, so that the sudden drop of the fluid speed caused by the sudden increase of the flow area of the pipeline from the capillary tube 110 to the evaporation tube 120 is avoided, further, the jet noise and the bubbling noise caused by the insufficiently expanded supersonic jet flow are avoided, and the mute experience of the fluid pipeline assembly 100 and the refrigeration equipment using the fluid pipeline assembly 100 of the embodiment of the present application is improved. In addition, the speed reduction ratio design of the inlet transition pipe segment 1311 and the adjacent sub-transition pipe segment 1312 is important because the velocity of the fluid entering the divergent pipe 130 is relatively high. By setting the reduction ratio between the inlet transition pipe segment 1311 and the adjacent sub-transition pipe segment 1312 to be greater than 1 and less than or equal to 2, it can be ensured that no sudden drop of fluid speed occurs between the inlet transition pipe segment 1311 and the sub-transition pipe segment 1312 connected to the inlet transition pipe segment 1311, so as to avoid the generation of jet flow due to too fast speed reduction, and further reduce noise generated by the flow of fluid in the divergent pipe 130.
Wherein, the speed reduction ratio of the inlet transition pipe section 1311 and the sub-transition pipe section 1312 of the adjacent inlet transition pipe section 1311 is set to be more 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 connecting the inlet transition section 1311 may be 1.1, 1.35, 1.414, 1.5, 1.62, 1.732, or 2, etc. When the speed reduction ratio between the inlet transition pipe segment 1311 and the sub-transition pipe segment 1312 of the adjacent inlet transition pipe segment 1311 is 2, the fluid velocity in the sub-transition pipe segment 1312 of the adjacent inlet transition pipe segment 1311 is reduced to 1/2 of the fluid velocity in the inlet transition pipe segment 1311, the pipeline cross-sectional area of the sub-transition pipe segment 1312 of the adjacent inlet transition pipe segment 1311 is 2 times of that of the inlet transition pipe segment 1311, and the radius of the sub-transition pipe segment 1312 of the adjacent inlet transition pipe segment 1311 is equal to that of the inlet transition pipe segment 1311
Multiple, about 1.414 times.
It should be noted that the speed reduction ratio between the inlet transition pipe segment 1311 and the adjacent sub-transition pipe segment 1312 is the ratio of the flow rate of the fluid in the inlet transition pipe segment 1311 to the flow rate of the fluid in the adjacent sub-transition pipe segment 1312. The reduction ratio is the reciprocal of the sectional area of the pipeline.
In some embodiments, the speed reduction ratio m of each adjacent two-stage transition tube segment 131 is the same. The square of the first pipe diameter ratio (dp 2/dp 1) 2 Equal to the second number x to the power of the reduction ratio m of the two adjacent stages of transition sections 131. The first number n is the nearest integer of the second number x plus one, and the first diameter ratio (dp 2/dp 1) is the diameter ratio of the input end dp2 of the evaporator to the liquid outlet end dp1 of the capillary 110. Utensil for cleaning buttockThe body formula is: (dp 2/dp 1) 2 ＝m x X = n-1; alternatively, it can be converted into (dp 2/dp 1) 2 ≈m n-1 And n is the nearest integer.
The reduction ratios of the adjacent two-stage transition pipe sections 131 are set to be the same, and in a reasonable range, each stage of transition pipe section 131 can play a good role in reducing the speed of fluid, and the fluid does not flow in the divergent pipe 130 and has obvious turbulence disturbance, so that the more excellent stage-by-stage speed reduction can be realized, and jet flow noise can be effectively inhibited. By selecting a reasonable reduction ratio of each adjacent two-stage transition pipe section 131, the number of the transition pipe sections 131 can be designed reasonably according to the first pipe diameter ratio, and the fluid can be ensured to realize sufficient gradual speed reduction in the divergent pipe 130.
In some embodiments, the reduction ratio m of each adjacent two-stage transition pipe section 131 may also be different. Due to the faster speed of the fluid entering the divergent pipe 130, in order to avoid jet noise caused by excessive speed drop of the fluid when the inlet transition pipe section 1311 flows into the sub-transition pipe section 1312 of the adjacent inlet transition pipe section 1311, the speed reduction ratio of the inlet transition pipe section 1311 and the sub-transition pipe section 1312 of the adjacent inlet transition pipe section 1311 is smaller than that of the remaining adjacent two-stage transition pipe section 131. Therefore, when the fluid enters the adjacent sub-transition pipe section 1312 from the inlet transition pipe section 1311 at a higher speed, the fluid can be decelerated at a smaller speed reduction ratio, and the jet flow generated by the speed dip is avoided while the speed reduction purpose is achieved; the speed reduction ratio of the other adjacent two-stage transition pipe sections 131 can be properly increased, and at the moment, the fluid speed is lower, the speed reduction ratio is increased, the corresponding speed reduction amount is limited, and jet flow is not easily generated due to sudden drop of the fluid speed. Specifically, the speed reduction ratio of each adjacent two-stage transition pipe section 131 outside the inlet transition pipe section 1311 is greater than 1 and equal to or less than 5, for example, the speed reduction ratio of each adjacent two-stage transition pipe section 131 is 1.5, 2.2, 3.7, 4.5, or 5, and the like.
Wherein the first pipe diameter ratio is squared (dp 2/dp 1) 2 Equal to the product of the reduction ratios of the two transition stages 131. The first diameter ratio (dp 2/dp 1) is the diameter ratio of the input end dp2 of the evaporator to the outlet end dp1 of the capillary 110. The concrete formula is as follows: (dp 2/dp 1) 2 ＝m 1 ×m 2 ×…m i …×m n-1 For convenience of calculation and value taking, 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 transition sections 131, i.e. (dp 2/dp 1) 2 ≈m 1 ×m 2 ×…m i …×m n-1 。
By selecting a reasonable speed reduction ratio between the inlet transition pipe section 1311 and the sub-transition pipe section 1312 of the adjacent inlet transition pipe section 1311 and combining the speed reduction ratios of the other adjacent two-stage transition pipe sections 131, the reasonable number of transition pipe sections 131 can be designed according to the first pipe diameter ratio, and the sufficient gradual speed reduction of the fluid in the divergent pipe 130 can be ensured.
In some embodiments, the first number is equal to or greater than 4 and equal to or less than 6, i.e., the total number of inlet transition duct sections 1311, outlet transition duct sections 1313 connecting evaporator tubes 120, and sub-transition duct sections 1312 located between inlet transition duct sections 1311 and outlet transition duct sections 1313 is equal to or greater than 4 and equal to or less than 6, such as 4, 5, or 6. The gradual deceleration of the divergent tubes 130 is achieved through a first number of transition tube segments 131.
In some embodiments, the length of each sub-transition section 1312 gradually shortens in the direction of the inlet transition section 1311 to the outlet transition section 1313. Since the velocity of the fluid is decreasing in stages as it flows within the divergent conduit 130, the fluid velocity is faster near the inlet transition section 1311 and slower near the outlet transition section 1313, it being understood that at higher fluid velocities, the flow path required for the fluid to fully expand and decelerate is longer. By gradually shortening the length of each sub-transition pipe segment 1312 in the direction from the inlet transition pipe segment 1311 to the outlet transition pipe segment 1313, a longer flow path for expansion and speed reduction can be provided when the fluid speed is higher, and the flow path for expansion and speed reduction can be gradually shortened when the fluid speed is gradually reduced, so that the fluid can be fully expanded and speed reduced in each stage of the transition pipe segment 131, and the length of the divergent pipe 130 can be prevented from being too long. Therefore, by reasonably designing the length of the transition pipe section 131, the gradually-expanding pipe 130 has a better gradual speed reduction effect, vortex shedding and noise caused by unreasonable length design are effectively avoided, and the fluid is ensured to fully generate a stable flow field at the outlet of each stage of transition pipe section 131.
Specifically, the length of each sub-transition pipe segment 1312 is equal to or greater than 30mm, equal to or less than 80mm, for example, 30mm, 46mm, 55mm, 68mm, 70mm, or 80mm, etc. Because the fluid in the divergent pipe 130 flows from the inlet transition pipe section 1311 to the sub-transition pipe section 1312 connected to the inlet transition pipe section 1311, the fluid is decelerated for the first time and the speed is higher, so that the length of the sub-transition pipe section 1312 connected to the inlet transition pipe section 1311 is relatively longer than the length of the other sub-transition pipe sections 1312. The length of the sub-transition pipe segment 1312 connecting the inlet transition pipe segment 1311 is equal to or greater than 70mm, equal to or less than 80mm, for example, 70mm, 73mm, 77mm, or 80 mm.
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 next transition pipe section 131. The inner diameter of the connector segment 132 increases from the input end of the connector segment 132 to the output end of the connector segment 132. Therefore, the transition pipe sections 131 are smooth and have no bending, when the fluid flows from the previous transition pipe section 131 to the adjacent next transition pipe section 131 through the connecting pipe section 132, the fluid can smoothly pass through the connecting pipe section, the connecting pipe section is fully expanded, obvious turbulence disturbance can not occur, and the connecting pipe has remarkable advantage in suppressing jet flow noise. The fluid flowing in the divergent pipe 130 shows a smooth streamline shape, obvious turbulence disturbance does not occur, more excellent gradual speed reduction can be realized, the flow field performance is obviously superior to that of other pipe structures, and the divergent pipe 130 has obvious advantages in jet flow noise suppression.
Further, the adapter tube segment 132 is a conical tube, and an angle between the peripheral wall of the adapter tube segment 132 and the axial direction of the adapter tube segment 132 is less than or equal to 20 °, for example, 20 °, 18 °, 15 °, 9 °, 5 °, and the like. The expansion trend of the connecting pipe section 132 is gentle, which can provide the gradual expansion and deceleration of the fluid along the peripheral wall of the connecting pipe section 132, and reduce the deceleration speed of the fluid, thereby avoiding the generation of jet flow due to too fast deceleration, and further reducing the noise generated by the fluid flowing through the divergent pipe 130.
The transition pipe section 131 is a linear pipe having a constant diameter in the axial direction. Of course, in some embodiments, the diameter of the transition segment 131 may also vary in the axial direction at a rate that is less than the rate of change in the diameter of the adapter segment 132 in the axial direction. The rate of change of the diameter of the transition section 131 in the axial direction is intended to be sufficiently fluid-expandable and to be smooth in the fluid flow lines and less likely to cause disturbances.
With continuing reference to fig. 4, fig. 4 is a cross-sectional view of another embodiment of the fluid conduit assembly of the present application. In some embodiments, when the transition tube segment 131 has at least four stages, the connector tube segment 132 correspondingly has at least three stages. The first two stages of the connecting pipe sections 132 have a pipe length of 10mm or more, for example, 10mm, 12mm, or 15 mm. When the fluid flows into the two subsequent stages of transition pipe sections 131, the flow rate of the fluid is sufficiently reduced, the length of the last stage of connecting pipe section 132 can be increased appropriately, and the inner diameter of the output end of the last stage of connecting pipe section 132 can be increased appropriately to reduce the number of stages of transition pipe sections 131. Specifically, the length of the last stage of the connecting pipe section 132 is greater than or equal to 50mm, such as 50mm, 54mm, 60mm or 63 mm. The inner diameter of the input end of the last connecting pipe section 132 needs 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 connecting pipe section 132 is adjusted according to actual working conditions, so that the high-degree self-adaptability is realized.
It should be noted that the axis of the divergent tube 130 may be linear, or the axis of the divergent tube 130 may be curved according to the installation condition, but it is only necessary to ensure that the transition tube sections 131 between each stage are smooth and have no bending.
Specifically, the divergent tube 130 may be formed by integrally extruding and molding with a die, or the divergent tube 130 may also be formed by extruding and welding step by step, only the inner diameter of the junction between the transition tube segment 131 and the joining tube segment 132 needs to be the same. Further, the wall thickness of each stage of the transition pipe section 131 and the adapter pipe section 132 is the same.
A further embodiment of the present application provides a refrigeration device comprising a body and the fluid conduit assembly 100 of any of the embodiments described above. A fluid conduit assembly 100 is disposed within the body. The fluid conduit assembly 100 includes a capillary tube 110 and a divergent tube 130. Wherein the divergent tube 130 includes a first end 133 and a second end 134 disposed opposite to each other. The first end 133 is connected to the liquid outlet end of the capillary 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 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 110 is 1, 1.3, 1.5, 1.7, or 2.
Conventionally, the capillary tube 110 is usually inserted directly into the evaporation tube 120, and if the divergent tube 130 is provided, the capillary tube 110 is also inserted directly into the divergent tube 130. When the fluid flows from the capillary tube 110 into the divergent tube 130, there is a sudden increase of at least 9 times in the tube flow area, which in turn causes a velocity dip (at least 9 times lower velocity) and thus an insufficiently expanded supersonic jet to generate jet noise. In the present 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 divergent tube 130 is within a reasonable range, and the sudden drop of fluid velocity between the capillary tube 110 and the divergent tube 130 does not occur, thereby avoiding the generation of jet noise and bubbling noise due to the insufficiently expanded supersonic jet, suppressing vortex shedding noise, improving the connection strength of the capillary tube 110 and the divergent tube 130, and improving the mute experience of the refrigeration equipment.
The terms "first", "second" and "third" in this application are used for descriptive purposes only and are not to be construed as indicating the number of indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the embodiments of the present application, all directional indicators (such as upper, lower, left, right, front, rear, 8230; \8230;) are used only to explain the relative positional relationship between the components at a specific posture (as shown in the drawing), the motion, etc., and if the specific posture is changed, the directional indicator is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. A process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to the listed steps or elements but may alternatively include additional steps or elements not listed or inherent to such process, method, article, or apparatus.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.
Claims (11)
1. A fluid conduit assembly, comprising,
a capillary tube;
the gradually expanding pipe comprises a first end and a second end which are oppositely arranged, the first end is connected with the liquid outlet end of the capillary, and the ratio of the flow sectional area of the first end to the flow sectional area of the liquid outlet end of the capillary is more than or equal to 1 and less than or equal to 2.
2. The fluid conduit assembly of claim 1, wherein the liquid outlet end of the capillary tube abuts the first end, and wherein the distance between the liquid outlet end of the capillary tube and the first end is less than or equal to 0.5mm.
3. The fluid conduit assembly of claim 1, wherein the fluid conduit assembly comprises:
and the first sleeve is sleeved and fixed outside the joint of the liquid outlet end of the capillary tube and the first end.
4. A fluid conduit assembly according to claim 3, wherein the spacing between the first sleeve and the capillary tube and the reducer is less than or equal to 0.2mm; and/or the length of the first sleeve is more than or equal to 10mm.
5. The fluid conduit assembly of claim 1, further comprising a first buffer section disposed at a junction of the capillary tube and the first end, wherein a cross-sectional flow area of the first buffer section is equal to a cross-sectional flow area of the outlet end of the capillary tube, wherein a cross-sectional flow area of an outlet end of the first buffer section is equal to a cross-sectional flow area of the first end, and wherein the cross-sectional flow area of the first buffer section increases from the capillary tube to the diverging tube.
6. The fluid conduit assembly of claim 1, wherein the fluid conduit assembly comprises:
the input end of the evaporation tube is connected with the second end, and the ratio of the flow sectional area of the input end of the evaporation tube to the flow sectional area of the second end is more than or equal to 1 and less than or equal to 2.
7. The fluid conduit assembly of claim 6, wherein the input end and the second end of the evaporation tube abut, the input end and the second end of the evaporation tube being spaced less than 0.5mm apart.
8. The fluid conduit assembly of claim 6, comprising:
and the second sleeve is sleeved and fixed outside the joint of the input end of the evaporation tube and the second end.
9. A fluid conduit assembly, as claimed in claim 8, wherein the spacing between the second sleeve and the evaporator tube and the divergent tube is less than or equal to 0.2mm; and/or the length of the second sleeve is more than or equal to 10mm.
10. A fluid conduit assembly according to claim 3, wherein the divergent tube comprises a first number of transition tube sections and a connecting tube section connecting two adjacent transition tube sections, the first number of transition tube sections having inner diameters that increase in sequence in a direction from the liquid outlet end of the capillary tube to the input end of the evaporator tube;
the first number of transition pipe sections comprises an inlet transition pipe section connected with the capillary tube, an outlet transition pipe section connected with the evaporation tube and a sub-transition pipe section positioned between the inlet transition pipe section and the outlet transition pipe section, and the speed reduction ratio of the inlet transition pipe section to the sub-transition pipe section adjacent to the inlet transition pipe section is greater than 1 and less than or equal to 2.
11. A refrigeration apparatus, comprising:
a body;
a fluid conduit assembly according to any one of claims 1-10, disposed within the body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221236717.2U CN217685998U (en) | 2022-05-19 | 2022-05-19 | Fluid pipeline assembly and refrigeration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221236717.2U CN217685998U (en) | 2022-05-19 | 2022-05-19 | Fluid pipeline assembly and refrigeration equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217685998U true CN217685998U (en) | 2022-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221236717.2U Active CN217685998U (en) | 2022-05-19 | 2022-05-19 | Fluid pipeline assembly and refrigeration equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217685998U (en) |
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2022
- 2022-05-19 CN CN202221236717.2U patent/CN217685998U/en active Active
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