CN110470069A - Porous type microchannel throttling refrigerator - Google Patents
Porous type microchannel throttling refrigerator Download PDFInfo
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- CN110470069A CN110470069A CN201910776590.XA CN201910776590A CN110470069A CN 110470069 A CN110470069 A CN 110470069A CN 201910776590 A CN201910776590 A CN 201910776590A CN 110470069 A CN110470069 A CN 110470069A
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- outlet
- shell
- porous media
- porous
- dilatation
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Classifications
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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
Abstract
Porous type microchannel according to the present invention throttling refrigerator, including shell, porous media core；And multiple micro- round tubes of low pressure, wherein, shell is in closed barrel shape, with outlet end and dilatation end, outlet is arranged on the end face of the outlet end of shell, inlet tube is arranged on the side wall of housing outlet end, outlet, inlet tube is connected with shell respectively, partition is provided in shell, between inlet tube and outlet, porous media core is cylindrical in shape, its shape matches with inner walls, it is arranged in shell, between inlet tube and dilatation end end face, dilatation end end face, inner walls, porous media core constitutes dilatation cavity, partition, inner walls, porous media core constitutes inlet cavities, partition, inner walls, outlet end end face constitutes outlet cavity, multiple micro- round tubes of low pressure are arranged in parallel in respectively in porous media core, one end of the micro- round tube of low pressure is connected to dilatation cavity, the other end is connected to outlet cavity.
Description
Technical field
The invention belongs to enhanced heat exchange throttling refrigeration fields, and in particular to a kind of porous type microchannel throttling refrigerator.
Background technique
Micro-miniature refrigerator is freezed using Joule-Thomson effect (J-T effect), is widely used in size
The lesser occasion in space, such as inner cavity cold therapy, infrared night vision device etc..Current main J-T effect refrigeration device still uses
The inferior type of Han Consulting (helical finned tube type), outer diameter are that the stainless steel tube of 0.5mm-1mm diameter winds mandrel, and high pressure gas flows through entirely
Stainless steel tube enters the capillary-compensated of tube head.The outer fin of stainless steel tube is skimmed in low-pressure gas reflux after throttling, and pre-cooling becomes a mandarin
High pressure gas.But the air inlet of the inferior type throttling refrigerator of Han Consulting only has one to two tunnel, and refrigerating capacity is smaller, and the support shaft at center accounts for
According to larger space inside refrigerator, refrigerator structure is not compact, and heat exchange efficiency is low.
There is research by microchannel in conjunction with J-T throttling refrigeration structure, the general silicon materials strong using plasticity carry out
Production, high-low pressure microchannel plate is overlapped mutually, after high pressure gas enters high pressure microchannel layers, by adjacent low pressure microchannel layers
Cryogenic gas it is cooling, evaporation cavity is entered after the high pressure gas reducing pressure by regulating flow after pre-cooling and absorbs external heat source heat, finally by
Low pressure microchannel returns.But above-mentioned throttling refrigerator bearing capacity is lower, and incoming gas pressure is limited by silicon materials, system
Cold temperature decline space is limited, meanwhile, in structure can not multiple-layer stacked, cause air inflow smaller, refrigerating capacity is lower；It is more now
The axial thermal conductivity problem of the Rectangular Microchannel structure channel partition of use is very important, causes microchannel throttling refrigerator heat loss
It is higher；Especially most of high-low pressure interchannel contact area is limited, usually only 1-2 face contact, so that high/low temperature fluid heat transfer
It is insufficient.To sum up, existing microchannel throttling refrigerator air inflow is smaller, and axial thermal conductivity problem is serious, high-low pressure heat exchange area
It is limited, constrain the raising of microchannel throttling refrigerator heat exchange efficiency.
Summary of the invention
In order to improve the deficiency of existing traditional Han Consulting inferior type throttling refrigerator and microchannel throttling refrigerator, the present invention is being passed
It unites in the thinking of the inferior type throttling refrigerator of Han Consulting, is devised in conjunction with porous media material and tubular type microchannel structure a kind of porous
Type microchannel throttling refrigerator.
The present invention provides a kind of porous type microchannel throttling refrigerators, have the feature that, including shell, have extremely
Few inlet tube, an outlet；Porous media core；And multiple micro- round tubes of low pressure, wherein shell is in closed barrel shape, tool
There are outlet end and dilatation end, outlet is arranged on the end face of the outlet end of shell, and the side of housing outlet end is arranged in inlet tube
On wall, outlet, inlet tube are connected with shell respectively, and partition is provided in shell, more between inlet tube and outlet
Hole dielectric core is cylindrical in shape, and shape matches with inner walls, is arranged in shell, be located at inlet tube and dilatation end end face it
Between, dilatation end end face, inner walls, porous media core constitute dilatation cavity, partition, inner walls, porous media core structure
At inlet cavities, partition, inner walls, outlet end end face constitute outlet cavity, and multiple micro- round tubes of low pressure are arranged in parallel in respectively
In porous media core, one end of the micro- round tube of low pressure is connected to dilatation cavity, and the other end is connected to outlet cavity.
In the throttling refrigerator of porous type microchannel provided by the invention, it can also have the following features: wherein, it is multiple
Inlet tube is uniformly circumferentially positioned in housing sidewall.
In addition, can also have the following features: it in the throttling refrigerator of porous type microchannel provided by the invention
In, the quantity of inlet tube is 4.
In addition, can also have the following features: it in the throttling refrigerator of porous type microchannel provided by the invention
In, the micro- round tube of low pressure is parallel to the axis setting of shell, is uniformly arranged in porous media core respectively.
In addition, can also have the following features: it in the throttling refrigerator of porous type microchannel provided by the invention
In, outer diameter and the inner walls of partition match, and divider upright is arranged in the axis of shell.
In addition, can also have the following features: it in the throttling refrigerator of porous type microchannel provided by the invention
In, porous media core is made of foam metal material.
In addition, can also have the following features: it in the throttling refrigerator of porous type microchannel provided by the invention
In, the porosity of porous media core is greater than 90%.
In addition, can also have the following features: it in the throttling refrigerator of porous type microchannel provided by the invention
In, the end face at dilatation end is made of stainless steel.
The action and effect of invention
Related porous type microchannel throttling refrigerator according to the present invention, because having porous media core and multiple
The micro- round tube of low pressure.
Since the porous media void size in porous media core is extremely small, flowing and Heat transfer boundary can be broken
Therefore layer has the function of enhancing heat exchange efficiency.
Further, tubular type microchannel surface is smooth, and flow resistance is smaller in pipe, can effectively reduce as low-pressure channel
The pressure loss in low-pressure channel.
Further, round tube and porous media completely attach to, and heat exchange area greatly improves, it can be achieved that with work in porous media
The abundant heat exchange of matter.
Detailed description of the invention
Fig. 1 is refrigerator shell appearance schematic diagram in the embodiment of the present invention；
Fig. 2 is refrigerator integral perspective schematic diagram in the embodiment of the present invention；
Fig. 3 is backheat heat exchanging segment sectional view in the embodiment of the present invention；And
Fig. 4 is that refrigerator faces schematic cross-section in the embodiment of the present invention.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention
Example combination attached drawing is applied to be specifically addressed porous type microchannel throttling refrigerator of the invention.
Embodiment
Porous type microchannel throttling refrigerator includes shell, porous media core 20 and the micro- round tube 30 of multiple low pressure.
As shown in Fig. 1,4, shell be in closed barrel shape, shell have shell 11, multiple inlet tubes 12, outlet 13, every
Plate 14.
The cylindrical shape of shell 11 has outlet end (Fig. 2 right end) and dilatation end (left end Fig. 2).Shell 11 have side wall,
Outlet end end face and the dilatation end end face end face Liang Ge, wherein dilatation end end face is made of stainless steel, the side of shell 11
Wall and outlet end end face are all made of the bad thermal insulation material of heating conduction and are made, and in embodiment, which uses hard glass
Glass.
Multiple inlet tubes 12 are separately positioned on the side wall of 11 outlet end of shell, and inlet tube 12 is micro- cylindrical structure, uniformly distributed
On entrance casing circumference, working medium can be made to uniformly enter in cavity.In embodiment, 4 12 uniform rings of inlet tube around and hang down
Directly it is arranged on the side wall of shell 11.
Outlet 13 is arranged on the end face of the outlet end of shell 11, and outlet 13 is round tube.
Outlet 13, inlet tube 12 are connected with shell 11 respectively, and partition 14 is arranged in shell 11, are located at inlet tube 12
Between outlet 13, outer diameter and 11 inner wall of shell of partition 14 match, and partition 14 is arranged perpendicular to the axis of shell 11.
As shown in Fig. 2, porous type microchannel throttling refrigerator has entrance 1, outlet section 2, backheat restriction portion 3 and expands
Hold section 4.
Entrance 1 is multiple micro- circular tube structures, is evenly arranged on entrance casing circumference, working medium can be made to uniformly enter cavity
It is interior.
Outlet section 2 is round tube form, and exit gas drains into outlet cavity through round tube microchannel, via outlet round tube row
Refrigerator out.
Backheat restriction portion 3, shape are designed as cylindrical type, and inside is respectively arranged porous media high-pressure channel, and porous
Uniformly distributed several micro- round tubes are low-pressure channel between medium.
Dilatation section 4 is made of backheat restriction portion 3 and shell.
As shown in Figure 3,4, porous media core 20 is cylindrical, and shape matches with 11 inner wall of shell, and setting is outside
In shell 11, between inlet tube 12 and dilatation end end face.In embodiment, porous media core 20 is used as high-pressure channel.
Wherein, porous media core 20 is that there are many solids in micro hole hole for band, is interconnected between hole or portion
Divide connection；The shape of hole has round, oval or a variety of irregular shapes；Fluid in hole can flow under certain condition
It is dynamic.Porous media void size is extremely small, and not being connected to of being communicated with of some between gap, keeps the working medium wherein flowed mixed
It closes, breaks flowing and Heat transfer boundary layer, heat exchange efficiency can be enhanced.
It is mainly made of porous media core 20 and micro- 30 two parts of round tube of low pressure in backheat restriction portion.To improve heat exchange effect
Rate, in embodiment, porous media core 20 is greater than using the foam metal material with higher-strength and rigidity, porosity
90%, by control porosity to control working medium flow in high-pressure channel, and then guarantee refrigerating capacity；Porous media is at each section
Aperture on face is variant, and the connecting degree in hole is not also identical, therefore flowing of the high-pressure working medium in porous media is irregular
, but always can relatively uniform circulation, working medium flows in different holes, increases working medium flow, increase Working fluid flow region,
To increase the heat exchange area with low-pressure channel, heat exchange uniformity and efficiency are improved.
Dilatation end end face, 11 inner wall of shell, porous media core 20 constitute dilatation cavity 15；Partition 14,11 inner wall of shell,
Porous media core 20 constitutes inlet cavities 16；Partition 14,11 inner wall of shell, outlet end end face constitute outlet cavity 17, partition
14 is completely isolated by inlet cavities 16 and outlet cavity 17.
Multiple micro- round tubes 30 of low pressure are arranged in parallel in respectively in porous media core 20, in embodiment, multiple micro- circles of low pressure
Pipe 30 is parallel to the axis setting of shell, is uniformly arranged in porous media core 20 respectively.One end of the micro- round tube 30 of low pressure connects
Logical dilatation cavity 15, the other end are connected to outlet cavity 17.
The micro- 30 microchannel interior walls surface of round tube of low pressure is smooth, and flow resistance is smaller in pipe, can effectively subtract as low-pressure channel
The pressure loss in small low-pressure channel；
Multiple micro- round tubes 30 of low pressure are distributed on demand inside porous media core 20, it is ensured that heat-exchange temperature is cut same
The uniform type being distributed on face, and round tube and porous media completely attach to, heat exchange area greatly improves, it can be achieved that in porous media
The abundant heat exchange of working medium.
Throttling refrigeration process of the working medium in refrigerator is as follows:
High temperature and pressure working medium is entered by the entrance round tube 12 of multiple circumference uniform distributions to outward opening of refrigerator, by entrance
Enter in the porous media core 20 in backheat restriction portion after mixing in cavity 16, thus with being evenly arranged in porous media core 20
The micro- pipe passageway 30 of low pressure in cryogenic fluid backheat heat exchange, complete throttling cooling after, working medium is out of porous media core 20
Outflow enters dilatation cavity 15, and heat source can be attached in the outer end face at dilatation end, and dilatation cavity 15 is interior by throttling and swollen
The cryogenic fluid and heat source of swollen cooling exchange heat, and after completing to the cooling of external heat source, working medium enters via the micro- round tube 30 of low pressure again
In outlet cavity 17, refrigerator is discharged eventually by outlet 13, completes throttling refrigeration temperature-fall period.
High pressure gas at normal temperature from refrigerant inlet pipe 12 even into the backheat restriction portion of porous media core 20, through low pressure
In micro- 30 channel of round tube low temperature reflux gas converting heat be pre-chilled, this flow process high pressure fluid porous media irregular sky
Existing Bernoulli effect is flowed in gap and there is burnt soup throttle effect again, and the gas collection after throttling cooling is intracavitary to dilatation, is expanding
External heat source heat is absorbed in cavity, is subsequently entered micro- 30 channel of round tube of low pressure, is flowed out through low tension outlet.
The action and effect of embodiment
The porous type microchannel throttling refrigerator according to involved in the present embodiment has porous media core and multiple low
Press micro- round tube.
Since the porous media void size in porous media core is extremely small, flowing and Heat transfer boundary can be broken
Therefore layer has the function of enhancing heat exchange efficiency.
Further, tubular type microchannel surface is smooth, and flow resistance is smaller in pipe, can effectively reduce as low-pressure channel
The pressure loss in low-pressure channel.
Further, round tube and porous media completely attach to, and heat exchange area greatly improves, it can be achieved that with work in porous media
The abundant heat exchange of matter.
Above embodiment is preferred case of the invention, the protection scope being not intended to limit the invention.
Claims (8)
1. a kind of porous type microchannel throttling refrigerator characterized by comprising
Shell has at least one inlet tube, outlet；
Porous media core；And
Multiple micro- round tubes of low pressure,
Wherein, the shell is in closed barrel shape, has outlet end and dilatation end,
The outlet is arranged on the end face of the outlet end of the shell, and the housing outlet end is arranged in the inlet tube
On side wall, the outlet, the inlet tube are connected with the shell respectively,
It is provided with partition in the shell, between the inlet tube and the outlet,
The porous media core is cylindrical in shape, and shape matches with the inner walls, is arranged in the shell, and institute is located at
It states between inlet tube and the end face at the dilatation end,
The end face at the dilatation end, the inner walls, the porous media core constitute dilatation cavity,
The partition, the inner walls, the porous media core constitute inlet cavities,
The partition, the inner walls, the outlet end end face constitute outlet cavity,
Multiple micro- round tubes of the low pressure are arranged in parallel in respectively in the porous media core, and one end of the micro- round tube of low pressure connects
Lead to the dilatation cavity, the other end is connected to the outlet cavity.
2. porous type microchannel according to claim 1 throttling refrigerator, it is characterised in that:
Wherein, multiple inlet tubes are uniformly circumferentially positioned in the housing sidewall.
3. porous type microchannel according to claim 1 throttling refrigerator, it is characterised in that:
Wherein, the quantity of the inlet tube is 4.
4. porous type microchannel according to claim 1 throttling refrigerator, it is characterised in that:
Wherein, the micro- round tube of the low pressure is parallel to the axis setting of the shell, is uniformly arranged on the porous media core respectively
In vivo.
5. porous type microchannel according to claim 1 throttling refrigerator, it is characterised in that:
Wherein, the outer diameter of the partition matches with the inner walls, and the divider upright is arranged in the axis of the shell.
6. porous type microchannel according to claim 1 throttling refrigerator, it is characterised in that:
Wherein, the porous media core is made of foam metal material.
7. porous type microchannel according to claim 6 throttling refrigerator, it is characterised in that:
Wherein, the porosity of the porous media core is greater than 90%.
8. porous type microchannel according to claim 1 throttling refrigerator, it is characterised in that:
Wherein, the end face at the dilatation end is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910776590.XA CN110470069A (en) | 2019-08-22 | 2019-08-22 | Porous type microchannel throttling refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910776590.XA CN110470069A (en) | 2019-08-22 | 2019-08-22 | Porous type microchannel throttling refrigerator |
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| Publication Number | Publication Date |
|---|---|
| CN110470069A true CN110470069A (en) | 2019-11-19 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910776590.XA Pending CN110470069A (en) | 2019-08-22 | 2019-08-22 | Porous type microchannel throttling refrigerator |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU565166A1 (en) * | 1975-05-14 | 1977-07-15 | Предприятие П/Я М-5727 | Throttling cooler |
| CN101149238A (en) * | 2007-11-09 | 2008-03-26 | 东南大学 | Plate type heat exchanger |
| 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 |
| CN205684974U (en) * | 2016-06-16 | 2016-11-16 | 厦门大学 | A kind of micro-channel heat exchanger with micro hole structure porous bottom surface |
| CN108709443A (en) * | 2017-02-15 | 2018-10-26 | 山东大学 | A kind of micro channel flat plate loop circuit heat pipe |
| CN209279722U (en) * | 2018-11-30 | 2019-08-20 | 华南理工大学 | A kind of mesh duct heat exchanger of stable structure |
-
2019
- 2019-08-22 CN CN201910776590.XA patent/CN110470069A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU565166A1 (en) * | 1975-05-14 | 1977-07-15 | Предприятие П/Я М-5727 | Throttling cooler |
| CN101149238A (en) * | 2007-11-09 | 2008-03-26 | 东南大学 | Plate type heat exchanger |
| 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 |
| CN205684974U (en) * | 2016-06-16 | 2016-11-16 | 厦门大学 | A kind of micro-channel heat exchanger with micro hole structure porous bottom surface |
| CN108709443A (en) * | 2017-02-15 | 2018-10-26 | 山东大学 | A kind of micro channel flat plate loop circuit heat pipe |
| CN209279722U (en) * | 2018-11-30 | 2019-08-20 | 华南理工大学 | A kind of mesh duct heat exchanger of stable structure |
Non-Patent Citations (1)
| Title |
|---|
| 王洪利: "《太阳能压缩式热泵经济性评价》", 30 April 2016, 冶金工业出版社 * |
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Application publication date: 20191119 |
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| WD01 | Invention patent application deemed withdrawn after publication |