CN110486978B - Array Cylinder Group Multistage Laminated Microchannel Throttling Heat Exchanger - Google Patents
Array Cylinder Group Multistage Laminated Microchannel Throttling Heat ExchangerDownload PDFInfo
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- CN110486978B CN110486978BCN201910807658.6ACN201910807658ACN110486978BCN 110486978 BCN110486978 BCN 110486978BCN 201910807658 ACN201910807658 ACN 201910807658ACN 110486978 BCN110486978 BCN 110486978B
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- 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
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/02—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect
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Abstract
Translated fromChinese
Description
Technical Field
The invention belongs to the field of enhanced heat exchange throttling refrigeration, and particularly relates to an array cylindrical group type multistage laminated microchannel throttling heat exchange refrigerator of a heat exchange unit formed by microchannel two-stage throttling precooling.
Background
The micro throttling refrigerator utilizes Joule-Thomson effect (J-T effect) to refrigerate, and is widely applied to occasions with smaller size space, such as inner cavity cryotherapy, infrared night vision devices and the like. At present, the main J-T effect refrigerator still adopts a Hampson type (spiral fin tube type), a stainless steel tube with the outer diameter of 0.5mm-1mm is wound on a mandrel, and high-pressure gas flows through the whole stainless steel tube and enters a capillary tube of a tube head for throttling. The throttled low-pressure gas flows back to pass through the outer fins of the stainless steel pipe to pre-cool the inflowing high-pressure gas. However, the air inlet of the Hampson type throttling refrigerator is only one to two paths, the refrigerating capacity is small, the central support shaft occupies a large space in the refrigerator, the refrigerator is not compact in structure, and the heat exchange efficiency is low.
With the development of microchannel technology, microchannel throttling refrigerators have been widely researched and applied, in order to ensure the processing precision of microchannels, silicon materials with strong plasticity are generally adopted for manufacturing, high-pressure and low-pressure microchannel plates are mutually overlapped, high-pressure gas enters a high-pressure microchannel layer and is cooled by low-temperature gas of an adjacent low-pressure microchannel layer, and precooled high-pressure gas enters an evaporation cavity for absorbing external heat source heat after throttling and depressurizing, and finally returns through a low-pressure microchannel. However, the throttle cooler has low pressure bearing capacity, the pressure of the inflow gas is limited by the silicon material, the cooling temperature reduction space is limited, and meanwhile, the structure of the throttle cooler cannot be overlapped in multiple layers, so that the air inflow is low and the cooling capacity is low. The existing microchannel refrigerator adopts single-stage regenerative refrigeration and throttling refrigeration, adopts a strand of refrigeration working medium, and finally achieves limited refrigeration temperature.
In summary, the existing micro-channel throttling refrigerator has the disadvantages of small air input, low heat exchange efficiency and limited cold end temperature, and restricts the application and development of the micro-channel throttling refrigerator.
Disclosure of Invention
In order to solve the problems, the invention provides an array cylindrical group type multistage laminated microchannel throttling heat exchange refrigerator.
The invention provides an array cylindrical group type multistage laminated microchannel throttling heat exchange refrigerator which is characterized by comprising an upper cover plate, a plurality of upper plate sheets, a plurality of lower plate sheets and a lower cover plate, wherein the upper plate sheets are overlapped in sequence, the upper plate sheets are overlapped in an up-and-down staggered manner, the upper plate sheets comprise an inlet section, a channel section and an evaporation cavity, the inlet section is provided with a through high-pressure inlet hole, a high-pressure outlet hole, a low-pressure inlet hole, an inwards-concave high-pressure inlet groove and an inwards-concave low-pressure outlet groove, the high-pressure inlet hole is communicated with the high-pressure inlet groove, the low-pressure outlet hole is communicated with the low-pressure outlet groove, the channel section comprises a first channel, a second channel, a third channel and a fourth channel, the first channel, the second channel, the third channel and the fourth channel are respectively provided with inwards-concave S channels arranged along the length direction of the channel, and, the density of the cylindrical needle ribs in the fourth flow channel is greater than that of the cylindrical needle ribs in the third flow channel, the density of the cylindrical needle ribs in the third flow channel is greater than that of the cylindrical needle ribs in the first flow channel, one end of the first flow channel is communicated with the high-pressure inlet groove, one end of the second flow channel is communicated with the low-pressure outlet groove, the first flow channel and the second flow channel are arranged adjacently, the lengths of the first flow channel and the second flow channel in the length direction of the channel sections are the same, the width of the first flow channel is smaller than that of the second flow channel in the width direction of the channel sections, one end of the third flow channel is communicated with the first flow channel, the other end of the third flow channel is communicated with the fourth flow channel, one end of the fourth flow channel is communicated with the third flow channel, and the other end of the fourth flow channel is communicated with the evaporation cavity.
In the array cylinder group type multistage laminated microchannel throttling heat exchange refrigerator provided by the invention, the refrigerator also has the following characteristics: wherein, the end of one end of the second flow channel is provided with a long groove-shaped through hole.
In addition, the array cylinder group type multistage laminated microchannel throttling heat exchange refrigerator provided by the invention can also have the following characteristics: the width of the third flow channel is larger than the sum of the width of the first flow channel and the width of the second flow channel.
In addition, the array cylinder group type multistage laminated microchannel throttling heat exchange refrigerator provided by the invention can also have the following characteristics: wherein, the lower plate comprises an inlet section, a passage section and an evaporation cavity, the inlet section is provided with an inward concave high-pressure outlet groove and an inward concave low-pressure inlet groove, the passage section comprises a fifth flow passage, a sixth flow passage, a seventh flow passage, an eighth flow passage and a ninth flow passage, the fifth flow passage, the sixth flow passage, the seventh flow passage, the eighth flow passage and the ninth flow passage are all provided with an inward concave S passage arranged along the length direction of the passage section, the seventh flow passage, the ninth flow passage and the eighth flow passage are sequentially arranged and communicated along the length direction of the passage section, one end of the fifth flow passage is communicated with the high-pressure outlet groove, the other end is communicated with the sixth flow passage, the seventh flow passage, the ninth flow passage and the eighth flow passage are adjacently arranged, the seventh flow passage, the ninth flow passage and the eighth flow passage are positioned at one side of the fifth flow passage, the lengths of the seventh flow passage, the ninth flow passage, the eighth flow passage and the fifth flow passage are the same along the length direction of the passage section, and the widths of the seventh flow channel, the ninth flow channel and the eighth flow channel are the same along the width direction of the channel section, one end of the seventh flow channel is communicated with the low-pressure inlet groove, the other end of the seventh flow channel is communicated with the ninth flow channel, one end of the ninth flow channel is communicated with the seventh flow channel, the other end of the ninth flow channel is communicated with the eighth flow channel, one end of the sixth flow channel is communicated with the fifth flow channel, and the other end of the sixth flow channel is communicated with the evaporation cavity.
In addition, the array cylinder group type multistage laminated microchannel throttling heat exchange refrigerator provided by the invention can also have the following characteristics: wherein the width of the fifth flow channel is smaller than the width of the seventh flow channel.
In addition, the array cylinder group type multistage laminated microchannel throttling heat exchange refrigerator provided by the invention can also have the following characteristics: and the width of the sixth flow channel is greater than the sum of the width of the fifth flow channel and the width of the seventh flow channel.
In addition, the array cylinder group type multistage laminated microchannel throttling heat exchange refrigerator provided by the invention can also have the following characteristics: and two through holes are respectively arranged on the outer side of one end of the eighth flow channel, and the positions of the through holes correspond to the positions of the long groove-shaped through holes.
In addition, the array cylinder group type multistage laminated microchannel throttling heat exchange refrigerator provided by the invention can also have the following characteristics: the upper plate and the lower plate are connected by adopting a diffusion fusion welding technology, and are mutually combined by depending on an atomic diffusion fusion welding technology of materials between each two plates, so that the sealing performance is good and no contact thermal resistance exists.
Action and Effect of the invention
The invention relates to an array cylindrical group type multistage laminated microchannel throttling heat exchange refrigerator which is structurally innovative in that high-pressure and low-pressure gases are completely isolated in the whole process from entering the refrigerator to recovering the gases, and the array cylindrical group type multistage laminated microchannel throttling heat exchange refrigerator is suitable for the condition that the high-pressure and low-pressure gases can mutually influence respective properties or generate reaction after being mixed; secondly, two kinds of gas of this structure all pass through twice throttle cooling, and the high-pressure gas can fully be precooled in the throttle cooling of low pressure gas twice, and the twice throttle of high-pressure gas then can produce more cold volumes and get into the evaporation chamber.
In addition, the invention sets the high-pressure and low-pressure backflow section as an S-shaped channel, so that two gases can be precooled in the backflow process, and the high-pressure and low-pressure gases achieve a better throttling effect.
Drawings
FIG. 1 is a schematic external view of a refrigerator in an embodiment of the present invention;
FIG. 2 is an exploded schematic view of a refrigerator in an embodiment of the present invention;
FIG. 3 is a schematic view of an upper plate flow channel arrangement in an embodiment of the present invention;
FIG. 4 is an enlarged schematic view of detail A of FIG. 3;
FIG. 5 is an enlarged schematic view of detail B of FIG. 3;
FIG. 6 is an enlarged schematic view of detail C of FIG. 3;
FIG. 7 is a schematic view of the distribution of the flow channels of the lower plate in an embodiment of the present invention;
FIG. 8 is an enlarged schematic view of detail D of FIG. 7;
FIG. 9 is an enlarged schematic view of detail E of FIG. 7;
FIG. 10 is a schematic flow diagram of the process in section E of FIG. 7;
FIG. 11 is a schematic view of the upper plate flow channel distribution according to the second embodiment of the present invention;
FIG. 12 is a schematic view of the distribution of the flow channels of the lower plate according to the second embodiment of the present invention;
FIG. 13 is a schematic view of the upper plate flow channel distribution in the third embodiment of the present invention;
FIG. 14 is a schematic view of the distribution of the flow channels of the lower plate in the third embodiment of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement objects and effects of the present invention easy to understand, the following embodiments are specifically described with reference to the accompanying drawings.
Example 1
As shown in fig. 1 and 2, the array cylindrical group type multistage laminated microchannel throttling heat exchange refrigerator comprises an upper cover plate c, a plurality of upper plates h and a plurality of lower plates g which are overlapped in an up-down staggered manner, a lower cover plate f, a high-pressure gas inlet pipe a, a low-pressure gas outlet pipe b, a high-pressure gas outlet pipe d and a low-pressure gas inlet pipe e, wherein the upper cover plate c, the upper plates h and the lower plates g are overlapped in an up-down staggered manner.
The upper cover plate c and the lower cover plate f with certain thicknesses play a role in supporting and stabilizing the whole refrigerator.
The upper cover plate c is provided with a high-pressure gas inlet hole and a low-pressure gas outlet hole which are communicated with each other.
The upper plate h is rectangular and comprises an inlet section, an outlet section, a channel section and an evaporation cavity hi.
As shown in fig. 3, the inlet and outlet section has a high pressure inlet opening ha, a high pressure outlet opening hd, a low pressure outlet opening hb, a low pressure inlet opening he, a concave high pressure inlet groove hac, and a concave low pressure outlet groove hbc therethrough.
The high pressure inlet hole ha communicates with the high pressure inlet groove hac, the low pressure outlet hole hb communicates with the low pressure outlet groove hbc, and the high pressure outlet hole hd, the low pressure inlet hole he do not communicate with the high pressure inlet groove hac and the low pressure outlet groove hbc.
The channel section comprises a flow passage h1, a flow passage h2, a flow passage h3 and a flow passage h 4.
The flow channel h1 is provided with an inward-concave S-shaped channel and is arranged along the length direction of the channel section, the flow channel h1 is designed in a baffling baffle mode, the flow channel h1 is provided with a micro baffle and a micro flow channel, the micro baffle is perpendicular to the flow direction of fluid, one end of the flow channel h1 is communicated with the high-pressure inlet groove hac, and the other end of the flow channel h 3538 is communicated with the flow channel h 3.
The flow channel h2 is provided with an inward-concave S-shaped channel and is arranged along the length direction of the channel section, the flow channel h2 is designed in a baffling baffle mode, the flow channel h2 is provided with a micro baffle and a micro flow channel, the micro baffle is perpendicular to the flow direction of fluid, one end of the flow channel h2 is communicated with the low-pressure outlet groove hbc, and the end part of the other end of the flow channel h2 is provided with a long-groove-shaped through hole h 5.
The flow channel h1 is arranged adjacent to the flow channel h2, the flow channel h1 is located on one side of the flow channel h2, the length of the flow channel h1 and the length of the flow channel h2 in the length direction of the channel section are the same, and the width of the flow channel h1 is smaller than the width of the flow channel h2 in the width direction of the channel section.
The flow channel h3 and the flow channel h4 are both provided with an inward-concave S-shaped channel which is arranged along the length direction of the channel segment, the flow channel h3 and the flow channel h4 are both designed into a baffling baffle form and are provided with a micro baffle and a micro flow channel, the micro baffle is vertical to the flowing direction of the fluid,
one end of the flow passage h3 is communicated with the flow passage h1, and the other end is communicated with the flow passage h 4.
One end of the flow passage h4 is communicated with the flow passage h3, and the other end is communicated with the evaporation cavity hi.
In order to prevent the heat exchange of the working medium between the two flow passages, a gap is formed between the flow passage h1 and the flow passage h 2.
The width of the flow passage h3 is greater than the sum of the width of the flow passage h1 and the width of the flow passage h 2.
The width of the flow channel h3 is the same as the width of the flow channel h4, and the length of the flow channel h3 is longer than the length of the flow channel h 4.
As shown in fig. 4, 5 and 6, a plurality of micro cylindrical needle ribs h1, h8 and h7 are respectively arranged in the flow passage h1, the flow passage h3 and the flow passage h4, the raised cylindrical needle ribs play a role in flow guiding and supporting, a plurality of cylindrical groups with smaller radius are arranged in the flow passage h4, the density of the cylindrical needle ribs in the flow passage h4 is greater than that in the flow passage h3, and the density of the cylindrical needle ribs in the flow passage h3 is greater than that in the flow passage h 1. The density of the needle ribs of different flow passages is set to be different, so that the high-pressure gas forms twice throttling and temperature reduction before entering the evaporation cavity, and the throttling can be performed to a greater extent at the flow passage h 4.
The evaporation cavity hi is a through hole penetrating the upper plate surface and the lower plate surface, and the evaporation cavity can be in a rectangular shape, a trapezoidal shape, an oval shape and the like. In the embodiment, the evaporation chamber hi is rectangular in shape, and is disposed at one end of the flow passage h4 and communicates with the flow passage h 4.
The lower plate g is rectangular and comprises an inlet section, an outlet section, a channel section and an evaporation cavity gi.
As shown in fig. 7, the inlet and outlet section has a high pressure inlet opening ga, a high pressure outlet opening gd, a low pressure outlet opening gb, a low pressure inlet opening ge, a concave high pressure outlet recess gdc, and a concave low pressure inlet recess gec therethrough.
The high pressure outlet hole gd communicates with the high pressure outlet groove gdc, the low pressure inlet hole ge communicates with the low pressure inlet groove gec, and the high pressure inlet hole ga and the low pressure outlet hole gb do not communicate with the high pressure outlet groove gdc and the low pressure inlet groove gec.
The channel section comprises a flow passage g1, a flow passage g2, a flow passage g3, a flow passage g4 and a flow passage g 6.
The flow channel g1 is provided with an inward-concave S-shaped channel and is arranged along the length direction of the channel section, the flow channel g1 is designed to be in a baffling baffle mode, the flow channel g1 is provided with a micro baffle and a micro flow channel, the micro baffle is perpendicular to the flow direction of fluid, one end of the flow channel g1 is communicated with the high-pressure outlet groove gdc, and the other end of the flow channel g1 is communicated with the flow channel g 2.
The flow passage g3, the flow passage g6 and the flow passage g4 are sequentially arranged and communicated along the length direction of the flow passage.
The flow channel g3, the flow channel g6 and the flow channel g4 are arranged adjacent to the flow channel g1, the flow channel g3, the flow channel g6 and the flow channel g4 are located on one side of the flow channel g1, the lengths of the flow channel g3, the flow channel g6 and the flow channel g4 and the length of the flow channel g1 in the length direction of the channel section are the same, the widths of the flow channel g3, the flow channel g6 and the flow channel g4 are the same in the width direction of the channel section, and the width of the flow channel g1 is smaller than that of the flow channel g 3.
The flow channel g3, the flow channel g6 and the flow channel g4 are all provided with concave S channels and are arranged along the length direction of the flow channel, the flow channel g3, the flow channel g6 and the flow channel g4 are all designed into a baffling baffle form and are provided with a micro baffle and a micro flow channel, and the micro baffle is perpendicular to the flow direction of the fluid.
Flow path g3 has one end in communication with low pressure inlet groove gec and the other end in communication with flow path g 6.
Flow path g6 has one end in communication with flow path g3 and the other end in communication with flow path g 4.
The flow channel g2 is provided with an inward-concave S-shaped channel which is arranged along the length direction of the channel section, the flow channel g2 is designed to be in a baffling baffle form, the flow channel g2 is provided with a micro baffle and a micro flow channel, the micro baffle is perpendicular to the flow direction of the fluid, one end of the flow channel g2 is communicated with the flow channel g1, and the other end of the flow channel g2 is communicated with the evaporation cavity gi.
The flow channel g2 is a backflow channel of a high-pressure working medium, high-pressure gas is fully throttled and cooled by the upper plate h and then reaches the evaporation cavity i, cold energy is released to the outside and then flows back to the lower plate g, the high-pressure gas finally flows out of the lower plate g through the outlet d by the flow channel g2 and the flow channel g1, and the gas passes through the evaporation section i and still has certain cold energy, so that the high-pressure gas flowing through the upper plate h3 can be precooled and cooled secondarily when passing through the lower plate g2, and the temperature of the gas is reduced to be lower before reaching the upper plate h4, so that the throttling and cooling effects are better.
The evaporation cavity gi is a through hole penetrating the upper plate surface and the lower plate surface, and the evaporation cavity can be rectangular, trapezoidal, oval and the like. In the embodiment, the evaporation chamber gi has a rectangular shape, and is disposed at one end of the flow passage g2 and communicates with the flow passage g 2.
In order to prevent the heat exchange of the working media among the flow channels, gaps are formed among the flow channel g1, the flow channel g3, the flow channel g6 and the flow channel g 4.
The width of the flow passage g2 is greater than the sum of the width of the flow passage g1 and the width of the flow passage g 3.
As shown in fig. 8 and 9, a plurality of micro cylindrical needle ribs g5 and g8 are respectively arranged in the flow channel g3 and the flow channel g6, the raised cylindrical needle ribs play a role in guiding and supporting, a plurality of cylindrical groups with smaller radius are arranged in the flow channel g6, the density of the cylindrical needle ribs in the flow channel g6 is greater than that of the cylindrical needle ribs in the flow channel g3, and the difference from the upper plate is that the low-pressure gas is fully throttled and cooled before entering the flow channel g4 of the heat return section, so that the generated cold energy can pre-cool the high-pressure channel of the upper plate.
Two through holes g7 are respectively arranged on the outer side of the flow passage g4 close to one end of the flow passage g6, and the through hole g7 corresponds to and is communicated with the long groove-shaped through hole h 5. As shown in fig. 10, arrow X indicates the flow direction of the working fluid.
The lower cover plate f is respectively provided with a high-pressure gas outlet hole and a low-pressure gas inlet hole which are communicated.
The array cylinder group type multistage laminated microchannel throttling heat exchange refrigerator sequentially comprises an upper cover plate c, an upper plate h, a lower plate g, an upper plate h, a lower plate g and a lower cover plate f from top to bottom.
The adjacent high-pressure inlet holes are communicated, the adjacent high-pressure outlet holes are communicated, the adjacent low-pressure inlet holes are communicated, and the adjacent evaporation chambers are communicated.
The high-pressure gas inlet pipe a communicates with the high-pressure gas inlet hole.
The low-pressure gas outlet pipe b communicates with the low-pressure gas outlet hole.
The high-pressure gas outlet pipe d is communicated with the high-pressure gas outlet hole.
The low-pressure gas inlet pipe e communicates with the low-pressure gas inlet hole.
In the embodiment, the upper cover plate d, the upper plate piece h, the lower plate piece g and the lower cover plate f are connected by adopting a diffusion fusion welding technology, and are combined by an atomic diffusion fusion welding technology of materials among the plate pieces, so that the sealing performance is good and no contact thermal resistance exists. The shape and the size of the micro-channel can be changed according to requirements, and flexibility is provided.
The upper and lower side plates with certain thickness and bearing capacity are designed on the upper and lower sides of the refrigerator and are welded with the high-low pressure channel into a whole through an atomic fusion welding process so as to ensure the integral bearing capacity of the refrigerator.
In the embodiment, the upper plate h and the lower plate g are both made of stainless steel materials, the flow channel is etched by adopting a printed circuit board etching technology, and the upper plate and the lower plate which are carved with different flow channel shapes are designed in advance according to the refrigeration and heat exchange requirements.
The high-pressure gas working medium is adopted as the coke soup throttling refrigerant in the micro-channel coke soup throttling refrigerator, and when the refrigerator is used under the normal-temperature working condition, the gas (such as nitrogen, argon, carbon dioxide and the like) or mixed working medium with the coke soup throttling coefficient larger than 0 can be adopted.
The refrigerator adopts the printed circuit board etching technology, can design and carve the slab of different inclinations in advance according to the refrigeration heat transfer demand, and adopt the atomic diffusion to fuse the welding technology again, the processing of the refrigerator that the design in the invention is convenient, practical feasible, the channel size of carving the slab can reach the micron level, the refrigerant is high-pressure gas, the refrigerator adopts stainless steel material, the bearing capacity is strong, safe and reliable.
The embodiment ensures that the processing process is feasible and convenient to implement, the diffusion fusion welding technology is adopted for the connection between each microchannel plate piece, the microchannel plate pieces are mutually combined by the atomic diffusion fusion welding technology of materials between each two plate pieces, and the microchannel plate pieces have good sealing performance and no contact thermal resistance. The shape and the size of the micro-channel can be changed according to requirements, and flexibility is provided.
Low-pressure gas flow process:
high-pressure gas enters the refrigerator from an inlet pipeline a, flows through an S-shaped micro-channel (h1) of a first-stage heat exchange section of an upper plate h, a cylindrical group is arranged in the channel, high-pressure fluid has Bernoulli effect and coke tar throttling effect in the flowing process, is throttled and cooled for multiple times in the S-shaped micro-channel, and is simultaneously subjected to heat exchange and cooling (precooling process) by low-pressure-stage gas flowing through a flow channel g4 of a lower plate g; the precooled high-pressure gas continuously flows forwards and continues to be throttled and cooled through a flow channel h6, wherein the radius of a cylindrical group of a h4 part is smaller, the number of the cylindrical group is more, the high-pressure gas is fully throttled and cooled through the flow channel h6, the high-pressure gas releases cold to the outside and then flows back to a lower plate g, and the high-pressure gas flows out of the lower plate g through a flow channel g2 and a flow channel g1, and the high-pressure gas flowing through a flow channel h3 in the upper plate h can be precooled and cooled for the first time and for the second time when passing through a flow channel g2 in the lower plate g, so that the gas is cooled to a lower temperature before reaching a flow channel h4 in the upper plate h;
the low-pressure gas enters a lower plate g of the refrigerator from an e inlet pipeline, flows through a g3 channel of the lower plate g firstly, the channel is an S-shaped channel, a cylindrical group is added into the channel, the low-pressure fluid has a coke and soup throttling effect in the flowing process and is throttled and cooled, then enters a g6 part of the low-pressure plate, the number of the cylindrical groups is large, the radius is small, the coke and soup effect is more obvious, the low-pressure gas enters a flow channel g4 of a heat exchange section to be precooled for high-pressure gas after being throttled and cooled twice through the flow channel g3 and the flow channel g6, then enters an upper plate h through an opening g7 on the heat return section, and then the low-pressure gas flows through the upper plate h2 and is discharged out of the refrigerator through an outlet b.
Example two
As shown in fig. 11 and 12, the other structure of the present embodiment is the same as that of the first embodiment except that the flow paths h1, h3, h4, g3 and g6 of the first embodiment are changed from S-shaped paths to linear rectangular paths, which are concave rectangular grooves formed on the plate, and convex cylindrical pin ribs formed in the flow paths are eliminated.
The gas can be accompanied with Bernoulli effect and pyro-soup effect when passing through a channel h1, wherein the Bernoulli effect is dominant at this stage, the joint of the channel h1 and the channel h3 adopts a form shown by h8 ', the high-pressure gas generates larger pressure drop after passing through the channel h1 to form first throttling and cooling, and can be precooled by the low-pressure gas throttled by a lower plate to enable the throttling effect to be more obvious, the pyro-soup effect is dominant at this stage, then the high-pressure gas passes through the channel h3 (the Bernoulli effect is dominant at this stage), then the high-pressure gas generates second throttling and cooling after suddenly reducing the section of the channel h 7', finally the high-pressure gas enters an evaporation cavity i and releases cold to the outside; the throttling section of the low-pressure gas of the lower plate is the same as the flow passage h3 and the flow passage h 4.
EXAMPLE III
As shown in fig. 13 and 14, the other structures of this embodiment are the same as those of the first embodiment, except that the flow passage h1, the flow passage h3, the flow passage h4, the flow passage g3 and the flow passage g6 of the first embodiment are changed from an S-shaped passage to a passage in which a plurality of cylinders are arranged in a staggered manner for throttling and supporting.
Effects and effects of the embodiments
The innovation of the structure of the array cylinder group type multistage laminated microchannel throttling heat exchange refrigerator in the embodiment is that the whole process from the gas entering the refrigerator to the gas recovery is completely isolated, and the array cylinder group type multistage laminated microchannel throttling heat exchange refrigerator is suitable for the condition that the high-pressure gas and the low-pressure gas can mutually influence the respective properties or generate reaction after being mixed; secondly, two kinds of gas of this structure all pass through twice throttle cooling, and the high-pressure gas can fully be precooled in the throttle cooling of low pressure gas twice, and the twice throttle of high-pressure gas then can produce more cold volumes and get into the evaporation chamber.
In addition, this embodiment sets the backward flow section of high low pressure to S type passageway, is in order to let two kinds of gases all can carry out the precooling to self at the in-process of backward flow, makes high low pressure gas reach better throttle effect:
certain cold energy can be remained after the low-pressure gas fully precools the high-pressure gas through the heat return section g4 of the lower plate, and the low-pressure gas can be precooled by the low-pressure gas in the process of refluxing through the h2 channel of the upper plate, so that the throttling and cooling effects of the low-pressure channels g3 and g6 of the lower plate are better.
After the high-pressure gas passes through the evaporation cavity, certain cold energy is remained, the upper plate pieces h3 and h4 can be precooled in the process of backflow of the lower plate piece g2, and the high-pressure gas can be precooled for the backflow of the high-pressure gas and the low-pressure gas.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (5)
1. The utility model provides a multistage stromatolite microchannel throttle heat transfer refrigerator of array cylinder group type which characterized in that includes:
an upper cover plate, a plurality of upper plate sheets, a plurality of lower plate sheets and a lower cover plate which are overlapped in sequence and staggered up and down,
wherein the upper plate sheet comprises an inlet and outlet section, a channel section and an evaporation cavity,
the inlet and outlet section is provided with a high-pressure inlet hole, a high-pressure outlet hole, a low-pressure inlet hole, a concave high-pressure inlet groove and a concave low-pressure outlet groove which are communicated,
the high pressure inlet hole is in communication with the high pressure inlet groove, the low pressure outlet hole is in communication with the low pressure outlet groove,
the channel section comprises a first flow passage, a second flow passage, a third flow passage and a fourth flow passage,
the first flow passage, the second flow passage, the third flow passage and the fourth flow passage are all provided with an inward concave S-shaped passage arranged along the length direction of the passage,
a plurality of raised cylindrical needle ribs are respectively arranged in the first flow passage, the third flow passage and the fourth flow passage, the cylindrical needle ribs are not arranged in the second flow passage,
the density of the cylindrical needle ribs in the fourth flow channel is greater than that in the third flow channel,
the density of the cylindrical needle ribs in the third flow channel is greater than that of the cylindrical needle ribs in the first flow channel,
one end of the first flow passage is communicated with the high-pressure inlet groove,
one end of the second flow passage is communicated with the low-pressure outlet groove,
the first flow channel and the second flow channel are arranged adjacently, the lengths of the first flow channel and the second flow channel along the length direction of the channel section are the same, and the width of the first flow channel is smaller than that of the second flow channel along the width direction of the channel section,
one end of the third flow passage is communicated with the first flow passage, the other end of the third flow passage is communicated with the fourth flow passage,
one end of the fourth flow channel is communicated with the third flow channel, the other end of the fourth flow channel is communicated with the evaporation cavity,
the end part of one end of the second flow passage is provided with a long groove-shaped through hole,
the lower plate comprises an inlet and outlet section, a channel section and an evaporation cavity,
the inlet and outlet section is provided with an inwards concave high-pressure outlet groove and an inwards concave low-pressure inlet groove,
the channel section comprises a fifth flow passage, a sixth flow passage, a seventh flow passage, an eighth flow passage and a ninth flow passage,
the fifth flow passage, the sixth flow passage, the seventh flow passage, the eighth flow passage and the ninth flow passage are all provided with S passages which are inwards concave along the length direction of the passage sections,
the seventh flow passage, the ninth flow passage and the eighth flow passage are sequentially arranged and communicated along the length direction of the passage section,
one end of the fifth flow passage is communicated with the high-pressure outlet groove, the other end of the fifth flow passage is communicated with the sixth flow passage,
the seventh flow channel, the ninth flow channel, the eighth flow channel and the fifth flow channel are adjacently arranged, the seventh flow channel, the ninth flow channel and the eighth flow channel are positioned at one side of the fifth flow channel, the lengths of the seventh flow channel, the ninth flow channel, the eighth flow channel and the fifth flow channel along the length direction of the channel section are the same, and the widths of the seventh flow channel, the ninth flow channel and the eighth flow channel along the width direction of the channel section are the same,
one end of the seventh flow passage is communicated with the low-pressure inlet groove, the other end of the seventh flow passage is communicated with the ninth flow passage,
one end of the ninth flow passage is communicated with the seventh flow passage, the other end is communicated with the eighth flow passage,
one end of the sixth flow passage is communicated with the fifth flow passage, the other end of the sixth flow passage is communicated with the evaporation cavity,
two through holes are respectively arranged on the outer side of one end of the eighth flow passage,
the position of the through hole corresponds to the position of the long groove-shaped through hole.
2. The array cylinder group type multistage laminated microchannel throttling heat exchange refrigerator of claim 1, wherein:
the width of the third flow channel is larger than the sum of the width of the first flow channel and the width of the second flow channel.
3. The array cylinder group type multistage laminated microchannel throttling heat exchange refrigerator of claim 1, wherein:
wherein a width of the fifth flow channel is smaller than a width of the seventh flow channel.
4. The array cylinder group type multistage laminated microchannel throttling heat exchange refrigerator of claim 1, wherein:
wherein the width of the sixth flow channel is greater than the sum of the width of the fifth flow channel and the width of the seventh flow channel.
5. The array cylinder group type multistage laminated microchannel throttling heat exchange refrigerator of claim 1, wherein:
the upper plate and the lower plate are connected by adopting a diffusion fusion welding technology, and are combined by the atomic diffusion fusion welding technology of materials between each two plates, so that the sealing performance is good and the contact resistance is avoided.
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| CN201910807658.6ACN110486978B (en) | 2019-08-29 | 2019-08-29 | Array Cylinder Group Multistage Laminated Microchannel Throttling Heat Exchanger |
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| CN114877552B (en)* | 2022-03-15 | 2025-02-18 | 武汉高芯科技有限公司 | Micro throttling cooler and its application method, infrared detector |
| CN115468332B (en)* | 2022-08-26 | 2024-10-01 | 武汉高芯科技有限公司 | Throttling refrigerator and throttling refrigeration infrared detector |
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