CN108759164B - Composite cooling device and equipment with laminated cross type micro-channel throttling refrigerator - Google Patents
Composite cooling device and equipment with laminated cross type micro-channel throttling refrigerator Download PDFInfo
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- CN108759164B CN108759164B CN201810585346.0A CN201810585346A CN108759164B CN 108759164 B CN108759164 B CN 108759164B CN 201810585346 A CN201810585346 A CN 201810585346A CN 108759164 B CN108759164 B CN 108759164B
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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
- F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
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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
- F25B23/00—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
-
- 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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- Engineering & Computer Science (AREA)
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
According to the composite cooling device and the equipment with the laminated cross type microchannel throttling refrigerator, the composite cooling device comprises the laminated cross type microchannel throttling refrigerator and the oscillating heat pipe part, the laminated cross type microchannel throttling refrigerator is formed by overlapping a plurality of cross type regenerative throttling assemblies in a staggered mode, each cross type regenerative throttling assembly comprises two regenerative throttling plates which are overlapped up and down, each regenerative throttling plate comprises an inlet section, a channel section and an expansion section which are sequentially connected, a plurality of linear grooves which are arranged in parallel are arranged on each channel section, the linear grooves on the two regenerative throttling plates are mutually staggered and communicated at the staggered position to form a regenerative throttling channel, the linear grooves in the two plates are mutually staggered to form a net contact, a net-shaped rotary net flow is formed in the flowing process of a working medium in the channel, and the heat exchange efficiency between the plates and the working medium can be enhanced.
Description
Technical Field
The invention belongs to the field of enhanced heat exchange, and particularly relates to a composite cooling device with a laminated cross-type micro-channel throttling refrigerator.
Background
The micro throttling refrigerator utilizes Joule-Thomson effect (J-T effect) to refrigerate, and is widely applied to occasions with small space size, 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 the microchannel technology, the microchannel throttling refrigerator is widely researched and applied, and is generally made of non-metallic materials such as glass and silicon in order to ensure the processing precision of the microchannel, but the microchannel throttling refrigerator made of the materials has low pressure bearing capacity, inflow gas pressure is limited by the materials, and a refrigerating temperature reduction space is limited; meanwhile, the common micro-channel is mostly of a single-layer heat exchange structure, so that the air input is small and the refrigerating capacity is low; although the side wall of the existing rectangular microchannel effectively supports the plate, the axial heat conduction of the partition wall of the channel is increased, and the heat loss of the microchannel throttling refrigerator is higher; the cylindrical micro-channel structure can reduce the axial heat conduction on the plate through the interval between the cylinders, but the bearing capacity is reduced, and the pressure drop in the channels of the rectangular and cylindrical plates has an increased space, so the temperature is not sufficiently reduced; and the existing refrigerator mostly adopts a mode of directly exchanging heat between a cold end and a heat source needing refrigeration, and the uniformity is poor during heat exchange. In summary, the existing micro-channel throttling refrigerator has the disadvantages of small air input, low heat exchange efficiency, poor heat exchange uniformity and limited bearing capacity, and restricts the application and development of the micro-channel throttling refrigerator.
Disclosure of Invention
The present invention is to solve the above problems, and an object of the present invention is to provide a novel composite cooling device and apparatus having a laminated cross-type microchannel throttling refrigerator.
The invention provides a composite cooling device with a laminated cross type micro-channel throttling refrigerator, which is characterized by comprising the laminated cross type micro-channel throttling refrigerator, a refrigerating system and a refrigerating system, wherein the laminated cross type micro-channel throttling refrigerator is provided with a capacity expansion end; and an oscillating heat pipe part connected with the expansion end, wherein the laminated cross-type microchannel throttling refrigerator comprises a plurality of regenerative throttling parts, each regenerative throttling part comprises a first regenerative throttling component and a second regenerative throttling component which are overlapped up and down, each first regenerative throttling component comprises two first regenerative throttling plates, a plurality of first straight line grooves penetrating through the upper surface and the lower surface of each first regenerative throttling plate are arranged on each first regenerative throttling plate, the first straight line grooves on the two first regenerative throttling plates which are overlapped up and down are mutually staggered and communicated at the staggered position, each first regenerative throttling component comprises two second regenerative throttling plates, a plurality of second straight line grooves which are inwards concave are arranged on each second regenerative throttling plate, the depth of the inwards concave grooves of each second straight line groove is smaller than the thickness of the corresponding second regenerative throttling plate, the second straight line grooves on the two second regenerative throttling plates which are overlapped up and down and oppositely arranged are mutually staggered and communicated at the staggered position, the oscillating heat pipe part comprises two overlapped oscillating heat pipe plates for uniformly distributing contacted heat sources, and a plurality of communicated U-shaped channels are designed in the oscillating heat pipe plates.
The composite cooling device with the laminated cross-type micro-channel throttling refrigerator can also have the following characteristics: wherein, the first heat-recovery throttling plate comprises an inlet section, a first channel section and a first capacity expansion section which are connected in sequence, the inlet section is provided with a first through inlet hole, a first through groove, a plurality of micro-cylinders which are arranged on the inlet groove in an array way and a first through outlet hole, the first inlet hole is communicated with the inlet groove, the first outlet hole is not communicated with the inlet groove, the first channel section is provided with a plurality of first straight line grooves which are communicated with the upper surface and the lower surface of the plate, the first straight line grooves are arranged in parallel, the first straight line grooves which extend along a preset angle are intersected with the inlet groove to form a plurality of inlet openings, the first capacity expansion section is provided with a first through capacity expansion hole, the first capacity expansion hole is connected with the first channel section, the first straight line grooves which extend along the preset angle are intersected with the first capacity expansion hole to form a plurality of first capacity expansion openings, the first heat-recovery throttling assembly comprises two first heat-recovery throttling plates which are, two first inlet holes of two adjacent inlet sections are communicated and form a first inlet channel, two first outlet holes are communicated to form a first outlet channel, two inlet grooves are oppositely arranged to form a communicated inlet groove channel, a plurality of micro-cylinders in the inlet grooves of the upper plate and the lower plate are overlapped and used for supporting and guiding flow, the inlet groove channel is communicated with an inlet opening, linear grooves on the two adjacent first channel sections are mutually staggered and communicated at a staggered position, the inlet openings are communicated with a plurality of first capacity expansion openings to form a plurality of first heat recovery throttling channels, first capacity expansion holes of the adjacent first capacity expansion sections are communicated to form a first capacity expansion channel, and the first capacity expansion channel is communicated with the first channel sections through the first capacity expansion openings.
In addition, in the composite cooling device with the laminated cross type micro-channel throttling refrigerator provided by the invention, the composite cooling device can also have the following characteristics: wherein the second regenerative throttle plate comprises an outlet section, a second channel section and a second capacity expansion section which are connected in sequence, the outlet section is provided with a second inlet hole, an outlet groove, a plurality of micro-cylinders arranged on the outlet groove in an array manner and a second outlet hole which is communicated, the second outlet hole is communicated with the outlet groove, the second inlet hole is not communicated with the outlet groove, the second channel section is provided with a plurality of second linear grooves which are concave inwards, the depth of the concave inwards of the second linear grooves is less than the thickness of the second regenerative throttle plate, the plurality of second linear grooves are arranged in parallel, a plurality of second linear grooves extending along a preset angle are intersected with the outlet groove to form a plurality of outlet openings, the second capacity expansion section is provided with second capacity expansion holes which are communicated, the second capacity expansion holes are connected with the second channel section, and a plurality of second capacity expansion holes extending along a preset angle are intersected with the second capacity expansion holes to form a plurality of second capacity expansion openings, the second backheating throttling component comprises two second backheating throttling plates which are overlapped up and down and are oppositely arranged on the inner concave surface of the linear groove, two second inlet holes of adjacent outlet sections are communicated with each other to form a second inlet channel, two second outlet holes are communicated with each other to form a second outlet channel, the two outlet grooves are oppositely arranged to form a communicated outlet channel, a plurality of micro-cylinders in the outlet grooves of the upper plate and the lower plate are overlapped and used for supporting and guiding, the outlet channel is communicated with an outlet opening, the second linear grooves on the adjacent second channel sections are mutually staggered and communicated at the staggered position, the outlet openings are communicated with a plurality of second capacity expansion ports to form a plurality of second backheating throttling channels, the second capacity expansion holes of the adjacent second capacity expansion sections are communicated to form a second capacity expansion channel, and the second capacity expansion channel is communicated with the second channel sections through the second capacity expansion ports.
In addition, in the composite cooling device with the laminated cross type micro-channel throttling refrigerator provided by the invention, the composite cooling device can also have the following characteristics: the laminated cross-type microchannel throttling refrigerator comprises an upper cover plate, a plurality of back-heating throttling components and a lower cover plate which are overlapped in sequence, wherein adjacent first inlet channels are communicated with second inlet channels, adjacent first outlet channels are communicated with second outlet channels, adjacent first expansion channels are communicated with second expansion channels, external refrigerating media flow in from the first inlet channels, enter the first back-heating throttling channels through inlet grooves and inlet openings of first channel sections to perform throttling refrigeration, then are converged into the first expansion channels, reach cold end temperatures in the first expansion channels and the second expansion channels, refrigerating media in the second expansion channels enter the second back-heating throttling channels from the second expansion ports, and then flow out from the second outlet channels through outlet groove channels.
The invention provides a refrigeration device which is characterized by comprising a refrigeration device for various heat sources, wherein the refrigeration device is the composite cooling device.
In the refrigeration apparatus provided by the present invention, there may be further provided a feature that: the refrigerating device is any one of an infrared night vision device, an inner cavity cryotherapy device and a tumor cryotherapy device.
Action and Effect of the invention
According to the novel composite cooling device and equipment with the laminated cross type microchannel throttling refrigerator, which are disclosed by the invention, a plurality of linear grooves which are arranged in parallel are arranged on the regenerative throttle plates of the laminated cross type microchannel throttling refrigerator, the regenerative throttle assembly comprises two regenerative throttle plates which are overlapped up and down, the linear grooves on the regenerative throttle plates are mutually staggered and communicated at the staggered positions to form the regenerative throttle channel, the cross type throttle channel can increase the heat exchange coefficient between the plate sheet and the working medium and improve the heat exchange strength between the regenerative throttle section channels, and the laminated regenerative heat exchange assembly designed in the invention increases the refrigerating capacity of the refrigerator.
The oscillating heat pipe is a reinforced heat exchange structure and is commonly used for heat exchange and cooling, concentrated heat of a heat source is quickly and uniformly dispersed on the whole oscillating heat pipe by utilizing the characteristic of uniform heat dissipation of the oscillating heat pipe, so that the heat is taken away by refrigeration of the micro-channel throttling refrigerator, and two refrigeration structures are compounded to achieve quick and uniform refrigeration effects.
Drawings
FIG. 1 is a schematic overall external view of a composite cooling device with a laminated cross-type microchannel throttling refrigerator in an embodiment of the present invention;
FIG. 2 is a schematic diagram of the overall appearance of a laminated cross-type microchannel throttling refrigerator in an embodiment of the invention;
FIG. 3 is a schematic diagram of the connection between the expansion end and the heat pipe portion according to an embodiment of the present invention;
FIG. 4 is an exploded schematic view of a stacked crossover type microchannel throttle cooler in an embodiment of the present invention;
FIG. 5 is a schematic view of a single high pressure channel upper plate in an embodiment of the invention;
FIG. 6 is a schematic view of a plate under a single high pressure channel in an embodiment of the invention;
FIG. 7 is a schematic view of a plate on a single low pressure channel in an embodiment of the invention;
FIG. 8 is a schematic view of a low pressure gallery assembly in an embodiment of the present invention;
FIG. 9 is an enlarged partial view of the overlap of the linear slots in the high pressure passage assembly in an embodiment of the present invention;
FIG. 10 is a schematic view of the outer shape of an oscillating hot pipe portion in an embodiment of the invention; and
FIG. 11 is a schematic view of an oscillating heat pipe plate in an embodiment of the invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the following embodiments are combined with the accompanying drawings to specifically describe the composite cooling device and the equipment with the laminated cross-type micro-channel throttling refrigerator.
Example one
As shown in fig. 1, the composite cooling apparatus with the laminated cross-type micro-channel throttle refrigerator includes a laminated cross-type micro-channel throttle refrigerator 100 and an oscillating hot pipe portion 200.
As shown in fig. 2, the stacked cross-type microchannel throttling heat exchange refrigerator 100 includes an inlet section 1, a regenerative throttling section 2, and an expansion section 3.
As shown in fig. 3, the oscillating hot pipe portion 200 is connected to an end of the expansion section 3.
High-pressure normal-temperature gas enters a regenerative throttling area from an inlet section 1 of the refrigerator, and is subjected to heat exchange and precooling by low-pressure low-temperature return gas on the adjacent side, high-pressure fluid has Bernoulli effect and coke hot water throttling effect in the flowing process, and the multi-layer low-temperature low-pressure gas subjected to regenerative throttling is collected into an expansion section 3, absorbs external heat source heat in the expansion section 3, enters a low-pressure channel and finally flows out through a low-pressure outlet. The high-pressure and low-pressure plates are arranged adjacently, so that the heat regeneration sufficiency of the high-pressure working medium is ensured, and the precooling effect in the multilayer high-pressure channel is as uniform and consistent as possible.
As shown in fig. 4, the laminated cross-type microchannel throttling refrigerator 100 includes an upper cover plate 10, a plurality of high pressure channel assemblies 20 and a plurality of low pressure channel assemblies 30 stacked alternately one on top of the other, a lower cover plate 40, and inlet and outlet pipes 50 and 60.
The upper cover plate 10 is provided with a through inlet hole.
The high-pressure channel assembly 20 includes a high-pressure channel upper plate 21 and a high-pressure channel lower plate 22 stacked one on another.
As shown in fig. 5 and 6, the upper plate 21 and the lower plate 22 of the high-pressure channel both include an inlet section, a regenerative throttling section, and an expansion section, which are connected in sequence.
As shown in fig. 6, the inlet section of the lower plate 22 of the high-pressure channel is rectangular and has a first inlet hole 221, an inward concave inlet groove 223 and a first outlet hole 222, the first inlet hole 221 is communicated with the inlet groove 223, and the first outlet hole 222 is not communicated with the inlet groove 223. In the embodiment, the inlet groove 223 is "L" shaped, and is recessed inward from the upper surface of the plate, and a plurality of upright micro-cylinders 2231 are arranged at intervals on the bottom surface of the groove in the channel of the inlet groove 223, and the micro-cylinder array structure has the supporting and flow guiding functions.
The lower plate 22 of the high-pressure channel has a rectangular regenerative throttling section, a plurality of linear grooves 224 running through the upper and lower surfaces of the plate are arranged on the plate, the linear grooves 224 are arranged in parallel, and the linear grooves 224 extending along a predetermined angle are intersected with the inlet groove 223 to form at least one inlet opening. The predetermined angle is theta (0< theta <90 deg., 90 deg. < theta <180 deg.) from the horizontal along the length of the lower plate 22 of the high-pressure passage, and in the embodiment, the predetermined angle theta is 45 deg.. In the embodiment, the linear grooves 224 are all in micron-sized dimensions, and the channel spacing is also in micron-sized dimensions, so as to ensure the compactness of the channel arrangement.
The long side of the inlet section rectangle of the lower plate 22 of the high-pressure channel is connected with the short side of the regenerative throttling section rectangle and then is in a T shape.
As shown in the enlarged detail view E of fig. 6, the straight groove 224 is a rectangular groove designed on the regenerative throttle section and forming an angle θ with the horizontal, and 226 is a planar area without groove. In the embodiment, the two sides of the width direction of the lower plate 22 of the high-pressure channel are left with the plane areas 227 without grooves.
The capacity expansion section of the lower plate 22 of the high-pressure channel is provided with a first through capacity expansion hole 225, the first capacity expansion hole 225 is communicated with the regenerative throttling section, and a plurality of linear grooves 224 extending along a preset angle on the regenerative throttling section are intersected with the first capacity expansion hole 225 to form at least one capacity expansion opening. The shape of the expansion section can be rectangular, trapezoidal, oval and the like. In an embodiment, the expansion section is trapezoidal, one side of the length of the bottom side of the trapezoid faces outward to increase the contact area between the contact and the tail heat dissipation unit, and the first expansion hole 225 is also trapezoidal matching with the expansion section.
The shape and size of the high-pressure channel upper plate 21 and the high-pressure channel lower plate 22 are the same, and only have some differences in local parts.
The inlet section of the upper plate 21 of the high-pressure channel has the same structure as that of the inlet section of the lower plate 22 of the high-pressure channel, but the inlet groove of the upper plate 21 of the high-pressure channel is inwards concave from the lower surface of the plate.
As shown in fig. 5, the inlet section of the upper plate 2122 of the high-pressure passage is rectangular and has a first inlet hole 211, an inwardly concave inlet groove 213 and a first outlet hole 212, the first inlet hole 211 is communicated with the inlet groove 213, and the first outlet hole 212 is not communicated with the inlet groove 213. In the embodiment, the inlet groove 213 is "L" shaped and is recessed inward from the lower surface of the plate, and a plurality of upright micro-cylinders 2131 are arranged on the bottom surface of the groove in the channel of the inlet groove 213 at intervals in an array manner, and the micro-cylinder array structure has the functions of supporting and guiding flow.
The regenerative throttling section of the upper plate 21 of the high-pressure channel has the same structure as the regenerative throttling section of the lower plate 22 of the high-pressure channel, except that the inclined direction of the linear groove 214 is staggered with the inclined direction of the linear groove 224, as shown in a partial enlarged view D of the linear groove 214 in FIG. 5. In the embodiment, the two sides of the width direction of the plate 21 on the high-pressure channel are provided with the plane areas 216 without grooves.
The expansion section of the upper plate 21 of the high-pressure channel has the same structure as that of the expansion section of the lower plate 22 of the high-pressure channel, and the first expansion hole 215 has the same shape and size as that of the first expansion hole 225.
The upper plate 21 of the high-pressure channel and the lower plate 22 of the high-pressure channel are overlapped up and down, two first inlet holes 211 and 221 of the inlet section are communicated and form a first inlet channel, two first outlet holes 212 and 222 are communicated and form a first outlet channel, two concave inlet grooves 213 and 223 are oppositely arranged and form a communicated inlet groove channel, the inlet groove channel is communicated with an inlet opening, the linear grooves 214 and 224 on the regenerative throttling sections of the upper plate 21 of the high-pressure channel and the lower plate 22 of the high-pressure channel are mutually staggered and communicated at the staggered position, at least one inlet opening is communicated with at least one expansion port to form at least one high-pressure throttling channel, and the first expansion holes 215 and 225 on the expansion sections of the upper plate 21 of the high-pressure channel and the lower plate 22 of the high-pressure channel are communicated and form first expansion ports which are communicated with the respective expansion ports.
In the embodiment, the upper plate 21 and the lower plate 22 of the high-pressure channel are both made of stainless steel materials, the straight line grooves 214 and 224 are etched by adopting a printed circuit board etching technology, and plates with different slopes are designed in advance according to the refrigeration and heat exchange requirements.
The low pressure passage assembly 30 includes a low pressure passage upper plate 31 and a low pressure passage lower plate 32 which are stacked one on another.
The low-pressure channel plate 31 includes an outlet section, a regenerative throttling section, and an expansion section, which are connected in sequence.
As shown in fig. 7, the outlet section of the upper plate 31 of the low-pressure channel is rectangular and has a through second inlet hole 311, an inwardly concave outlet groove 313 and a through second outlet hole 312, the second outlet hole 312 is communicated with the outlet groove 313, and the second inlet hole 311 is not communicated with the outlet groove 313. In the embodiment, the outlet groove 313 is in an "L" shape and is recessed from the lower surface of the plate, and a plurality of upright micro-cylinders 3131 are arrayed on the bottom surface of the groove in the channel of the outlet groove 313, and the micro-cylinder array structure has the functions of supporting and guiding the flow.
The regenerative throttling section of the upper plate 31 of the low-pressure channel is rectangular, a plurality of concave linear grooves 314 are arranged on the plate, the concave depth of the linear grooves 314 is smaller than the thickness of the upper plate 31 of the low-pressure channel, the linear grooves 314 are arranged in parallel, and the linear grooves 314 extending along a preset angle are intersected with the outlet groove 313 to form at least one outlet opening. The predetermined angle is θ (0< θ <90 °, 90 ° < θ <180 °) from the horizontal direction of the length direction of the pressure-discharge channel plate 31, and in the embodiment, the predetermined angle θ is 45 °. In the embodiment, the linear grooves 314 are in micron-scale dimensions, and the channel spacing 316 is also in micron-scale dimensions, so as to ensure the compactness of the channel arrangement.
As shown in the enlarged partial view of fig. 7, the straight groove 314 is a rectangular groove designed on the regenerative throttle section and forming an angle θ with the horizontal, and 316 is a planar area without a groove. In the embodiment, the two sides of the width direction of the plate 31 on the low-pressure channel are provided with the plane areas 317 without grooves.
The long side of the inlet section rectangle of the low-pressure channel upper plate 31 is connected with the short side of the regenerative throttling section rectangle and then is in a T shape.
The expansion section of the upper plate 31 of the low-pressure channel is provided with a second through expansion hole 315, the second expansion hole 315 is communicated with the regenerative throttling section, and a plurality of linear grooves 314 extending along a preset angle on the regenerative throttling section are intersected with the expansion hole 315 to form at least one expansion port. The shape of the expansion section can be rectangular, trapezoidal, oval and the like. In the embodiment, the expansion section is trapezoidal, one side of the length of the bottom side of the trapezoid faces outward to increase the contact area between the contact and the tail heat dissipation unit, and the second expansion hole 315 is also trapezoidal matching with the expansion section.
The lower plate of the low pressure channel has the same shape and size as the upper plate 31 of the low pressure channel, and only has some difference in local parts.
The inlet section of the lower plate 32 of the low-pressure channel has the same structure as that of the inlet section of the upper plate 31 of the low-pressure channel, and the inlet groove of the lower plate of the low-pressure channel is inwards concave from the upper surface of the plate.
The structure of the regenerative throttling section of the lower plate 32 of the low-pressure channel is the same as that of the regenerative throttling section of the upper plate 31 of the low-pressure channel, and the inclined direction of the linear groove is staggered with that of the linear groove 314.
The expansion section of the lower plate 32 of the low-pressure channel has the same structure as that of the expansion section of the upper plate 31 of the low-pressure channel, and the shape and the size of the expansion hole are the same as those of the expansion hole 315.
The upper plate 31 and the lower plate 32 of the low-pressure channel are overlapped up and down, two second inlet holes of the inlet section are communicated and form a second inlet channel, two second outlet holes are communicated and form a second outlet channel, two concave outlet grooves are oppositely arranged and form a communicated outlet groove channel, the outlet groove channel is communicated with an outlet opening, as shown in a partial enlarged view G shown in figure 8, linear grooves on the regenerative throttling section are mutually staggered and communicated at the staggered position, at least one outlet opening is communicated with at least one expansion opening to form at least one low-pressure throttling channel, and two expansion holes of the expansion section are communicated and form a second expansion channel and are communicated with respective expansion openings.
In the embodiment, the upper plate 31 and the lower plate 32 of the low-pressure channel are both made of stainless steel materials, the straight line groove is etched by adopting a printed circuit board etching technology, and plates with different slopes are designed in advance according to the refrigeration and heat exchange requirements.
In the embodiment, there are 3 groups of high- pressure channel assemblies 20 and 3 groups of low-pressure channel assemblies 30 stacked in an interlaced manner, and the laminated cross-type micro-channel throttling refrigerator 100 includes, from top to bottom, an upper cover plate 10, a high-pressure channel assembly 20, a low-pressure channel assembly 30, and a lower cover plate 40.
The adjacent first inlet channel is communicated with the second inlet channel, the adjacent first outlet channel is communicated with the second outlet channel, and the adjacent first capacity expansion channel is communicated with the second capacity expansion channel.
The upper cover plate 10 is provided with a through inlet hole communicating with the first inlet passage, and an inlet pipe 50 communicating with the inlet hole.
The lower cover plate 40 is provided with a through outlet hole which communicates with the outlet channel, and an outlet pipe 60 communicates with the outlet hole.
An upper side plate and a lower side plate which have bearing capacity and have certain thickness are designed on the upper part and the lower part of the regenerative throttling 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 cover plate, the high-pressure channel plate and the low-pressure channel plate are connected by adopting a diffusion fusion welding technology, and are combined by an atomic diffusion fusion welding technology of materials between the plates, 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.
As shown in fig. 9, the heat exchange medium flows up and down and back and forth between the cross-shaped channels, and the size of the heat exchange channel is micron-sized, so that the flow resistance of the heat exchange medium on the channel can be greatly increased, and the pressure drop between the channels can be increased, thereby enhancing the heat exchange between the high-pressure heat exchange unit and the low-pressure heat exchange unit and improving the refrigeration efficiency.
As shown in fig. 10, the oscillating hot tube portion 200 includes two identical oscillating hot tube sheets 201 that are stacked. In the embodiment, the connection between the oscillating hot tube plates and the end part of the expansion end of the laminated cross-type micro-channel throttling refrigerator adopt a diffusion fusion welding technology, so that the sealing performance is good and no contact thermal resistance exists.
The oscillating heat pipe plate 201 is provided with an oscillating heat pipe channel formed by a plurality of communicated U-shaped channels, and in the embodiment, the oscillating heat pipe channel is a groove which is arranged in the oscillating heat pipe plate 201 and is concave inwards.
As shown in fig. 11, the oscillating heat pipe plate 201 includes a plurality of U-shaped channels connected to form a curved channel, a straight channel, and a liquid-filled channel.
The linear channel 2015 is horizontally disposed along the length of the oscillating heat tube plate 201.
The curved channel comprises a plurality of communicated U-shaped channels, the plurality of U-shaped channels are arranged in an up-down inverted mode and are communicated with each other, the U-shaped channels are arranged in parallel along the length direction of the oscillating heat tube plate 201, the opening of each U-shaped channel faces the long edge of the rectangle of the oscillating heat tube plate 201, two ends of each curved channel are communicated with two ends of the linear channel 2015 respectively, and the oscillating heat tube plate 201 completes oscillation heat exchange and uniform heat through a U-shaped structure.
The liquid filling channel is a liquid filling pipeline 2014 used for filling working medium, one end, namely an outlet end, of the liquid filling pipeline 2014 is communicated with the outside, and the other end of the liquid filling pipeline is communicated with the linear channel 2015.
As shown in fig. 11, the curved passage has a condensation section 2011, an insulation section 2012 and an evaporation section 2013 from top to bottom, and the condensation section 2011 is close to the linear passage 2015.
The inner concave surfaces of the two oscillating heat pipe plates 201 are oppositely arranged and overlapped, and the respective inner concave oscillating heat pipe channels form a closed oscillating heat pipe channel. The oscillating hot pipe section 200 also includes an end cap disposed at the outlet end of the charge line 2014.
The oscillating heat pipe plate 201 is a structure integrating boiling, evaporation, condensation and pulse oscillation, a heat source falling on the oscillating heat pipe uniformly distributes and cools heat through heat transfer of the oscillating heat pipe, then the heat is transmitted to a capacity expansion cavity of a throttling refrigeration structure through the oscillating heat pipe, and finally refrigeration is finished in the throttling refrigeration structure to take away the heat.
The oscillating hot tube part 200 is connected to the expansion end of the throttling refrigerator 100, the expansion section of the throttling refrigerator 100 is trapezoidal, one side of the length of the bottom edge of the trapezoid faces outwards to form an end part, and the surface of the oscillating hot tube plate 201 in the oscillating hot tube part 200 is connected to the surface of the bottom edge of the trapezoid of the expansion section of the throttling refrigerator 100.
Particularly, the size of the oscillating heat pipe is selected according to practical application occasions, and if the area of the heat source in application is larger than the area of the end wall surface of the expansion end of the regenerative throttling refrigerator, the area of the upper surface of the oscillating heat pipe is the same as the area of the heat source; if the area of the heat source in application is smaller than the area of the end wall surface of the expansion end of the regenerative throttling refrigerator, the area of the upper surface of the oscillating heat pipe is the same as the area of the end wall surface of the expansion end.
The heat of the heat source enters the oscillating heat pipe, is uniformly distributed in the oscillating heat pipe through the oscillating heat exchange of the oscillating heat pipe, and is transmitted to the throttling refrigeration structure through the evaporation cavity connected with the oscillating heat pipe.
High-pressure gas working medium is adopted as coke soup throttling refrigerant in the laminated cross-type micro-channel coke soup throttling refrigerator, and when the refrigerator is used under the normal-temperature working condition, 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 external gas working medium enters the inlet channel from the inlet pipe 50, the gas working medium simultaneously enters the three high-pressure channel assemblies 20, enters the high-pressure throttling channel from the inlet groove channel and reaches the capacity expansion channel, and the gas working medium in the capacity expansion channel simultaneously enters the three low-pressure channel assemblies 30 and flows out from the outlet pipe 60 after passing through the low-pressure throttling channel, the outlet groove channel and the outlet channel.
High-pressure normal temperature gas enters the refrigerator from the inlet pipe 50, enters the high-pressure channel regenerative throttling section through the inlet section of the high-pressure channel assembly 20 to perform a coke tar throttling effect, is pre-cooled through the low-pressure channel regenerative throttling section of the high-pressure channel assembly 20, reaches the aim that the regenerative throttling low temperature is converged into the expansion cavity, exchanges heat with the outside in the expansion cavity through the low-pressure low-temperature gas, absorbs heat on an external radiator, and flows out of the refrigerator through the outlet pipe 60 after flowing through the low-pressure channel assembly 30.
The manufacturing method of the channel plate groove comprises the following steps:
in the embodiment, stainless steel with high strength is selected as a substrate material of the micro-channel structure, a printed circuit board type manufacturing technology is applied to the scorch throttling refrigerator, a laser etching technology of the printed circuit board is adopted for the plate, the designed channel shape is transferred to the photoetching top photoresist layer through an exposure imaging principle, and then the surface of the corresponding stainless steel plate is etched, the acceptable etching channel shape is flexible, and a good minimum characteristic size can be formed. Therefore, the required cross-type microchannel plate is manufactured by adopting the laser etching technology of the printed circuit board. Then, the plates are contacted with each other by using an atomic diffusion fusion welding technology, and the atoms are diffused and recrystallized to form reliable connection.
Compared with the prior micro-channel refrigerator manufacturing technology, the micro-channel refrigerator manufacturing method has the advantages that:
1) the shape of a channel which can be etched by the laser etching technology of the printed circuit board is flexible, and the inclination angle of the channel and the number of the channels can be changed according to requirements;
2) the diffusion fusion welding technology can seamlessly overlap a plurality of heat exchange units, and the number of the plates can be adjusted according to specific heat exchange requirements;
3) the atom fusion welding process can basically eliminate the contact thermal resistance between the welded plates, the plates of all layers are superposed and combined into a whole, the formed refrigerator has good sealing and no additional thermal resistance at the combined part, and the heat exchange efficiency between the welded plates is increased.
Example two
The other structure of the embodiment is the same as that of the first embodiment, except that all the high-pressure channel components are formed by overlapping three plates, namely, an upper high-pressure channel plate 21 and a lower high-pressure channel plate 22 from top to bottom.
EXAMPLE III
The other structure of the present embodiment is the same as that of the first embodiment, except that the regenerative throttle structure of the low-pressure channel assembly 30 is adopted as the regenerative throttle structure of all the high-pressure channel assemblies 20, and the upper cover plate 10 and the lower cover plate 40 can be eliminated.
Example four
A refrigeration apparatus for use with a refrigerator having a multi-form heat source using a microchannel throttling refrigerator of any one of the above.
In this embodiment, the refrigerating apparatus employs the microchannel throttling refrigerator of the first embodiment for the refrigerator of the heat source.
EXAMPLE five
The other structure of this embodiment is the same as that of the fourth embodiment, and the refrigeration device is any one of an infrared night vision device, an intracavity cryotherapy device and a tumor cryotherapy device.
The refrigeration device in this embodiment is an intracavity cryotherapeutic device.
Effects and effects of the embodiments
According to the embodiment, the regenerative throttle plates are provided with a plurality of linear grooves which are arranged in parallel, the regenerative throttle assembly comprises two regenerative throttle plates which are overlapped up and down, the linear grooves on the regenerative throttle plates are mutually staggered and communicated at the staggered positions to form throttle channels, and the laminated crossed throttle channels can enhance the heat exchange coefficient between the plates and the working medium and increase the heat exchange strength between high-pressure channels and low-pressure channels.
In addition, the loose small cylinder arranged at the inlet section plays the roles of guiding airflow and supporting the channel.
Furthermore, the size of the section of the high-pressure and low-pressure channel and the size of an included angle between the channel and the horizontal direction can be determined by the physical property of working media in the channel and the heat exchange requirement and can be determined according to the processing limitation and the size requirement.
Furthermore, one micro-channel can be formed by a single high-low pressure heat exchange unit or a plurality of high-low pressure heat exchange units in an overlapping mode, and the number of layers of the heat exchange units is increased to increase the heat exchange channels on the plate, so that the heat exchange efficiency of the refrigerator is improved.
Further, utilize the even characteristic of heat dissipation of oscillating heat pipe in this embodiment, with the quick even dispersion of concentrated heat source heat to whole oscillating heat pipe, then take away the heat through the refrigeration of microchannel throttle refrigerator, thereby compound two kinds of refrigeration structure and reach more quick even refrigeration effect.
The above embodiments are preferred examples of the present invention, and are not intended to limit the scope of the present invention.
Claims (6)
1. A compound cooling device with a laminated cross-type microchannel throttling chiller, comprising:
the laminated cross-type micro-channel throttling refrigerator is provided with an expansion end; and
an oscillating hot pipe portion connected to the expansion end,
wherein the laminated cross-type micro-channel throttling refrigerator comprises a plurality of regenerative throttling components,
the regenerative throttling component comprises a first regenerative throttling component and a second regenerative throttling component which are overlapped up and down,
the first heat-recovery throttling component comprises two first heat-recovery throttling plates, a plurality of first straight line grooves penetrating through the upper surface and the lower surface of the first heat-recovery throttling plates are arranged on the first heat-recovery throttling plates, the first straight line grooves on the two first heat-recovery throttling plates which are overlapped up and down are mutually staggered and communicated at the staggered position,
the second regenerative throttling component comprises two second regenerative throttling plates, a plurality of second linear grooves which are concave inwards are arranged on the second regenerative throttling plates, the concave depth of the second linear grooves is smaller than the thickness of the second regenerative throttling plates, the second linear grooves on the two second regenerative throttling plates which are overlapped up and down and the concave surfaces of the second linear grooves are oppositely arranged are staggered with each other and communicated at the staggered position,
the oscillating heat pipe part comprises two superposed oscillating heat pipe plates for uniformly distributing contacted heat sources, a plurality of communicated U-shaped channels are arranged in the oscillating heat pipe plates,
the first heat-recovery throttling plate comprises an inlet section, a first channel section and a first expansion section which are connected in sequence,
the inlet section is provided with a first inlet hole, an inlet groove, a plurality of micro cylinders arranged on the inlet groove in an array mode and a first outlet hole, the first inlet hole is communicated with the inlet groove, the first outlet hole is not communicated with the inlet groove,
the first channel section is provided with a plurality of first straight line grooves which penetrate through the upper surface and the lower surface of the plate, the plurality of first straight line grooves are arranged in parallel, the plurality of first straight line grooves which extend along a preset angle are intersected with the inlet groove to form a plurality of inlet openings,
the first capacity expansion section is provided with a first through capacity expansion hole, the first capacity expansion hole is connected with the first channel section, a plurality of first straight line grooves extending along a preset angle are intersected with the first capacity expansion hole to form a plurality of first capacity expansion openings,
the first heat-recovery throttling component comprises two first heat-recovery throttling plates which are overlapped up and down,
the two first inlet holes of two adjacent inlet sections are communicated with each other to form a first inlet channel, the two first outlet holes are communicated with each other to form a first outlet channel, the two inlet grooves are oppositely arranged to form a communicated inlet groove channel, a plurality of micro-cylinders in the inlet grooves of the upper plate and the lower plate are overlapped for supporting and guiding flow, the inlet groove channels are communicated with the inlet openings, the linear grooves on the two adjacent first channel sections are mutually staggered and communicated at the staggered position, the inlet openings are communicated with the first expansion ports to form a plurality of first heat recovery throttling channels, the first expansion holes of the adjacent first expansion sections are communicated to form a first expansion channel, and the first expansion channels are communicated with the first channel sections through the first expansion ports.
2. The compound cooling device with a laminated cross type microchannel throttling refrigerator of claim 1, wherein:
wherein the second regenerative throttle plate comprises an outlet section, a second channel section and a second expansion section which are connected in sequence,
the outlet section is provided with a second through inlet hole, an outlet groove, a plurality of micro cylinders arranged on the outlet groove in an array mode and a second through outlet hole, the second outlet hole is communicated with the outlet groove, the second inlet hole is not communicated with the outlet groove,
a plurality of second linear grooves which are concave inwards are arranged on the second channel section, the concave depth of the second linear grooves is smaller than the thickness of the second regenerative throttle plate, the second linear grooves are arranged in parallel, the second linear grooves which extend along a preset angle are intersected with the outlet grooves to form a plurality of outlet openings,
the second capacity expansion section is provided with a second through capacity expansion hole, the second capacity expansion hole is connected with the second channel section, and a plurality of second linear grooves extending along a preset angle are intersected with the second capacity expansion hole to form a plurality of second capacity expansion openings.
3. The compound cooling device with a laminated cross type microchannel throttling refrigerator of claim 2, wherein:
the second regenerative throttling component comprises two second regenerative throttling plates which are overlapped up and down and the concave surfaces of the linear grooves are arranged oppositely,
the two second inlet holes of the adjacent outlet sections are communicated with each other to form a second inlet channel, the two second outlet holes are communicated with each other to form a second outlet channel, the two outlet grooves are oppositely arranged to form a communicated outlet groove channel, the plurality of micro cylinders in the outlet grooves of the upper plate and the lower plate are overlapped for supporting and guiding flow, the outlet groove channels are communicated with the outlet openings, the second linear grooves on the adjacent second channel sections are mutually staggered and communicated at the staggered position, the plurality of outlet openings are communicated with the plurality of second expansion ports to form a plurality of second regenerative throttling channels, the second expansion holes of the adjacent second expansion sections are communicated to form a second expansion channel, and the second expansion channels are communicated with the second channel sections through the second expansion ports.
4. The compound cooling device with a laminated cross type microchannel throttling refrigerator of claim 3, wherein:
wherein, the laminated cross micro-channel throttling refrigerator comprises an upper cover plate, a plurality of regenerative throttling components and a lower cover plate which are overlapped in sequence,
the adjacent first inlet channel is communicated with the second inlet channel, the adjacent first outlet channel is communicated with the second outlet channel, the adjacent first capacity expansion channel is communicated with the second capacity expansion channel,
the external refrigeration medium flows in from the first inlet channel, enters the first heat-recovery throttling channel through the inlet groove channel and the inlet opening of the first channel section for throttling refrigeration, then flows into the first capacity expansion channel, reaches the cold end temperature in the first capacity expansion channel and the second capacity expansion channel, enters the second heat-recovery throttling channel from the second capacity expansion ports, and then flows out from the second outlet channel through the outlet groove channel.
5. A refrigeration apparatus, comprising:
comprising cooling means for cooling a plurality of forms of heat source,
the cooling device is the composite cooling device of claim 4.
6. The refrigeration appliance according to claim 5, wherein:
the refrigerating equipment is any one of an inner cavity cryotherapy apparatus and a tumor cryotherapy apparatus.
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| CN201810585346.0A CN108759164B (en) | 2018-06-08 | 2018-06-08 | Composite cooling device and equipment with laminated cross type micro-channel throttling refrigerator |
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| CN201810585346.0A CN108759164B (en) | 2018-06-08 | 2018-06-08 | Composite cooling device and equipment with laminated cross type micro-channel throttling refrigerator |
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| CN108759164B true CN108759164B (en) | 2020-05-05 |
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| CN110486979B (en) * | 2019-08-29 | 2021-08-24 | 上海理工大学 | Multi-stage single-side precooling laminated staggered micro-channel throttling heat exchange refrigerator |
| CN115388571B (en) * | 2022-08-25 | 2024-02-23 | 武汉高芯科技有限公司 | Large-cooling-capacity ultra-miniature throttling refrigerator and refrigerating process thereof |
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| CN103175430A (en) * | 2012-06-28 | 2013-06-26 | 郑州大学 | Annular micro-passage heat exchange plate |
| CN103423911A (en) * | 2012-06-25 | 2013-12-04 | 上海理工大学 | Refrigerator |
| CN104142034A (en) * | 2013-05-09 | 2014-11-12 | 中国科学院理化技术研究所 | Miniature throttling refrigerator |
| CN105627609A (en) * | 2015-12-30 | 2016-06-01 | 上海理工大学 | Refrigerating device for cylinder clustered printed circuit board type micro-channels |
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| JPH0996453A (en) * | 1995-10-02 | 1997-04-08 | Daikin Ind Ltd | Cryogenic refrigerator |
| CN201731690U (en) * | 2010-07-12 | 2011-02-02 | 广东增城市基业汽车空调有限公司 | Commercial air conditioner four-radiating-plate parallel-connection type condenser with throttle pipes |
| CN103423911A (en) * | 2012-06-25 | 2013-12-04 | 上海理工大学 | Refrigerator |
| CN103175430A (en) * | 2012-06-28 | 2013-06-26 | 郑州大学 | Annular micro-passage heat exchange plate |
| CN104142034A (en) * | 2013-05-09 | 2014-11-12 | 中国科学院理化技术研究所 | Miniature throttling refrigerator |
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