CN113074493A - Vacuum tube and refrigerator - Google Patents
Vacuum tube and refrigerator Download PDFInfo
- Publication number
- CN113074493A CN113074493A CN202010011070.2A CN202010011070A CN113074493A CN 113074493 A CN113074493 A CN 113074493A CN 202010011070 A CN202010011070 A CN 202010011070A CN 113074493 A CN113074493 A CN 113074493A
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- China
- Prior art keywords
- pipe
- tube
- vacuum
- sealing piece
- inner pipe
- Prior art date
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- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 87
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 38
- 238000003860 storage Methods 0.000 claims description 34
- 239000002184 metal Substances 0.000 claims description 32
- 229910052751 metal Inorganic materials 0.000 claims description 32
- 238000005057 refrigeration Methods 0.000 claims description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- 229910052759 nickel Inorganic materials 0.000 claims description 19
- 238000007747 plating Methods 0.000 claims description 19
- 229910000679 solder Inorganic materials 0.000 claims description 16
- 239000011521 glass Substances 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 11
- 239000002002 slurry Substances 0.000 claims description 10
- 239000000741 silica gel Substances 0.000 claims description 9
- 229910002027 silica gel Inorganic materials 0.000 claims description 9
- 229910000833 kovar Inorganic materials 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- NEIHULKJZQTQKJ-UHFFFAOYSA-N [Cu].[Ag] Chemical group [Cu].[Ag] NEIHULKJZQTQKJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 31
- 239000012212 insulator Substances 0.000 description 22
- 239000010935 stainless steel Substances 0.000 description 12
- 229910001220 stainless steel Inorganic materials 0.000 description 12
- 238000001816 cooling Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000005476 soldering Methods 0.000 description 6
- 229920001296 polysiloxane Polymers 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000009489 vacuum treatment Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000010963 304 stainless steel Substances 0.000 description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 2
- 238000007772 electroless plating Methods 0.000 description 2
- 239000000499 gel Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010943 off-gassing Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910000604 Ferrochrome Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- KGWWEXORQXHJJQ-UHFFFAOYSA-N [Fe].[Co].[Ni] Chemical compound [Fe].[Co].[Ni] KGWWEXORQXHJJQ-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000006172 buffering agent Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 150000002815 nickel Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- F25D17/08—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation using ducts
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2500/00—Problems to be solved
- F25D2500/02—Geometry problems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Insulation (AREA)
- Refrigerator Housings (AREA)
Abstract
The present invention provides a vacuum tube comprising: the outer pipe is sleeved outside the inner pipe and arranged at intervals with the inner pipe; the end seal is configured to be sandwiched between the outer tube and the inner tube to sealingly secure the outer tube and the inner tube, and a vacuum cavity is defined between the outer tube, the inner tube, and the end seal. The vacuum tube can reduce convection heat transfer by vacuumizing between two layers of sealed tubes; the end sealing piece is clamped on the two layers of pipes to seal and fix the two layers of pipes, so that the outer pipe and the inner pipe can always keep a certain distance, the structure of the whole vacuum pipe is stable, an independent appearance structure is kept, and the vacuum cavity can also keep a stable vacuum state.
Description
Technical Field
The invention relates to the technical field of refrigerating and freezing devices, in particular to a vacuum tube and a refrigerator.
Background
The traditional independent refrigerator integrates a refrigerating system and a refrigerator body, the refrigerating system needs to occupy larger volume generally, the internal volume of the refrigerator body is limited, and the refrigerator body is special in local shape and complex in process because the refrigerator body is required to give way for the refrigerating system generally. In addition, because the size of the independent refrigerator is fixed, the refrigerator is placed in a single position, and the requirement for adjusting the position of the refrigerator by a user cannot be met.
Disclosure of Invention
It is an object of the invention to provide a pipe which reduces losses in the transfer of cold.
A further object of the present invention is to provide a refrigerator with a storage part as required.
In particular, the present invention provides a vacuum tube comprising: the outer pipe is sleeved outside the inner pipe and arranged at intervals with the inner pipe; the end seal is configured to be sandwiched between the outer tube and the inner tube to sealingly secure the outer tube and the inner tube, and a vacuum chamber is defined between the outer tube, the inner tube, and the end seal.
Optionally, the outer tube is made of metal tubing;
the inner pipe is made of a metal pipe fitting;
the end seal is made of quartz glass.
Optionally, the end seal is an annular member.
Optionally, the end sealing pieces are respectively formed with a nickel plating layer on the inner and outer surfaces thereof;
and welding sheets are arranged between the nickel plating layer and the outer pipe and between the nickel plating layer and the inner pipe, and the end sealing part is welded with the outer pipe and the inner pipe to be fixed in a sealing manner.
Optionally, the solder flakes are silver bronze solder flakes.
Optionally, a metal sheet is arranged between the end sealing piece and the outer pipe and between the end sealing piece and the inner pipe;
and glass powder slurry is arranged between the end sealing piece and the metal sheet, and the end sealing piece, the outer pipe and the inner pipe are sealed and fixed by melting the glass powder slurry and welding the metal sheet.
Optionally, the metal sheet is a kovar sheet.
Optionally, a silica gel layer is arranged between the end sealing member and the outer pipe and between the end sealing member and the inner pipe, and the end sealing member is bonded with the outer pipe and the inner pipe through the silica gel layer to be fixed in a sealing manner.
Optionally, the length of the end sealing piece clamped between the outer pipe and the inner pipe is 10mm-15 mm;
the distance between the outer pipe and the inner pipe is 0.5mm-20 mm;
the inner diameter of the inner tube is 3 to 5 times the distance between the outer tube and the inner tube.
The present invention also provides a refrigerator including:
one or more storage portions, each storage portion defining a respective storage space therein;
the refrigeration module is arranged away from one or more storage parts and is configured to cool air entering the refrigeration module to form cold energy; and
and one end of the air supply pipeline is detachably connected with the refrigeration module, the other end of the air supply pipeline is connected with the storage part and used for supplying cold energy into the storage part, and at least one part of the air supply pipeline is the vacuum tube.
The vacuum tube can reduce convection heat transfer by vacuumizing between two layers of sealed tubes; the end sealing piece is clamped on the two layers of pipes to seal and fix the two layers of pipes, so that the outer pipe and the inner pipe can always keep a certain distance, the structure of the whole vacuum pipe is stable, an independent appearance structure is kept, and the vacuum cavity can also keep a stable vacuum state.
Furthermore, the two layers of tubes of the vacuum tube are both metal tubes, so that the structure of the vacuum tube is stable, the end sealing piece is made of quartz glass, and the vacuum tube has the characteristics of low heat conductivity and low air release rate and can solve the problem of heat transfer of a heat bridge of the vacuum tube.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
figure 1 is a schematic structural view of a vacuum tube according to one embodiment of the present invention.
Figure 2 is a schematic structural view of a vacuum tube according to another embodiment of the present invention.
Figure 3 is a schematic structural view of a vacuum tube according to yet another embodiment of the present invention.
Fig. 4 is a schematic structural view of a refrigerator according to one embodiment of the present invention.
Fig. 5 is a schematic structural view of a refrigerator according to another embodiment of the present invention.
Fig. 6 is a schematic cross-sectional view of the refrigerator shown in fig. 3.
FIG. 7 is a schematic cross-sectional view of a vacuum thermal insulator according to an embodiment of the present invention.
Fig. 8 is a schematic view showing the fitting of the storage part and the air supply duct of the refrigerator shown in fig. 4.
Fig. 9 is a schematic view showing the combination of the refrigeration module and the air supply line of the refrigerator shown in fig. 4.
Detailed Description
In the following description, the orientation or positional relationship indicated by "front", "rear", "upper", "lower", "left", "right", etc. is an orientation based on the refrigerator 200 itself as a reference.
Figure 1 is a schematic diagram of a vacuum tube 800 according to one embodiment of the present invention. Fig. 2 is a schematic structural diagram of a vacuum tube 800 according to another embodiment of the present invention. Figure 3 is a schematic diagram of a vacuum tube 800 according to yet another embodiment of the present invention. The vacuum tube 800 of the present invention comprises an outer tube 801, an inner tube 802 and an end seal 803, wherein the outer tube 801 is sleeved on the inner tube 802 and an inner pipe 802 at intervals; the end seal 803 is configured to be sandwiched between the outer tube 801 and the inner tube 802 to sealingly secure the outer tube 801 and the inner tube 802, and the outer tube 801, the inner tube 802 and the end seal 803 define a vacuum chamber 810 therebetween. The vacuum tube 800 of the present invention can reduce convection heat transfer by evacuating between two layers of sealed tubes; the end sealing member 803 is clamped between the two layers of tubes to seal and fix the outer tube 801 and the inner tube 802, so that the outer tube 801 and the inner tube 802 can always keep a certain distance, the whole vacuum tube 800 is stable in structure, an independent appearance structure is kept, and the vacuum chamber 810 can also keep a stable vacuum state. The vacuum chamber 810 of the vacuum tube 800 of the present invention has a vacuum degree of 10-1-10-3Pa。
The outer tube 801 is made of a metal tube; the inner tube 802 is made of metal tubing; the end seal 803 is made of quartz glass. The two layers of pipes are both metal pipes, so that the structure of the vacuum pipe 800 is stable. Preferably, the outer tube 801 and the inner tube 802 are both stainless steel tubes. The inner surface of the stainless steel tube can be mirror surface or evaporation-coated. Such as 304 stainless steel. The stainless steel tube can ensure the strength of the vacuum tube 800, has beautiful appearance, reduces radiation heat transfer, and can avoid air leakage caused by corrosion and corrosion. The end sealing member 803 is made of quartz glass, has the characteristics of low thermal conductivity and low outgassing rate, and can solve the problem of heat transfer of a thermal bridge of the vacuum tube 800.
The thickness of the outer tube 801 and the thickness of the inner tube 802 may be the same or different. The outer tube 801 has a thickness of 1mm to 1.5mm, for example, 1mm, 1.2mm, 1.5 mm. The inner tube 802 has a thickness of 1mm to 1.5mm, for example, 1mm, 1.2mm, 1.5 mm. The end seal 803 may be an annular member, and the length of the end seal 803 sandwiched between the outer pipe 801 and the inner pipe 802 is 10mm to 15mm, for example, 10mm, 12mm, and 15 mm. Through a lot of experimental studies, the length range of the end sealing member 803 between the outer pipe 801 and the inner pipe 802 is preferably limited to 10mm-15mm, which can ensure the tight sealing of the end sealing member 803 to the outer pipe 801 and the inner pipe 802, and can avoid the volume reduction of the vacuum chamber 810 caused by the overlarge end sealing member 803, so that the heat insulation effect of the vacuum heat insulator 100 is good. The distance between the outer tube 801 and the inner tube 802 is 0.5mm-20mm, such as 0.5mm, 2mm, 5mm, 10mm, 15mm, 20 mm. The distance between the outer pipe 801 and the inner pipe 802 is set to be 0.5mm-20mm, so that different heat insulation and product requirements can be met. The inner diameter of the inner tube 802 is 3 to 5 times the distance between the outer tube 801 and the inner tube 802.
As shown in fig. 1, in some embodiments, the end seals 803 are formed with a nickel plating layer 841 on their inner and outer surfaces, respectively; solder sheets 842 are arranged between the nickel-plated layer 841 and the outer pipe 801 and the inner pipe 802, and the end sealing member 803 is welded with the outer pipe 801 and the inner pipe 802 through the nickel-plated layer 841 and the solder sheets 842 to realize the sealing and fixing. Through forming nickel coating 841 respectively at the inside and outside surface of tip sealing member 803, rethread is at the solder lug 842 that sets up between nickel coating 841 and outer tube 801, inner tube 802, makes nickel coating 841, solder lug 842 weld realize that tip sealing member 803 and outer tube 801, the sealed fixed of inner tube 802, can make tip sealing member 803 and outer tube 801, the inseparable sealing of inner tube 802, avoids appearing the gas leakage that sealed untight leads to. The solder pieces 842 may be, for example, silver copper solder pieces, Ag: 72 parts of Cu: 28. the thickness of the nickel-plated layer 841 is 1 μm-2 μm; the solder sheet 842 has a thickness of 0.08mm to 0.12mm, for example 0.1 mm. The thickness of the nickel-plating layer 841 is 1 μm-2 μm, which can satisfy the requirements of adhesion and metal welding. The thickness of the solder sheet 842 is 0.08mm-0.12mm, which not only gives consideration to the welding strength, but also avoids heat conduction.
The preparation process of the vacuum tube 800 comprises:
nickel plating the end seal 803;
clamping the end sealing member 803 between the outer tube 801 and the inner tube 802, and placing solder pieces 842 between the end sealing member 803 and the outer tube 801 and the inner tube 802, respectively;
air between the outer pipe 801 and the inner pipe 802 is pumped out through gaps between the end sealing member 803 and the outer pipe 801 and the inner pipe 802;
the end seal 803 is welded and sealed to the outer pipe 801 and the inner pipe 802.
The nickel plating process for the end seal 803 may be performed by a method of plating nickel on quartz glass as disclosed in the prior art. For example, quartz glass is pretreated and then subjected to electroless plating using an electroless plating solution. Wherein the pretreatment step comprises: removing a protective layer, removing oil, coarsening, sensitizing, activating and carrying out heat treatment; the chemical plating solution is a mixed solution composed of nickel salt, a reducing agent, a buffering agent, a complexing agent and the like; the pre-treated bare end sealing member 803 is chemically plated in a prepared chemical plating solution at a temperature of 80 ℃ to 90 ℃ for a certain time, and then is washed clean with deionized water, thus completing nickel plating on the end sealing member 803.
The soldering sealing treatment and the vacuum-pumping treatment are carried out in a vacuum furnace. The vacuum treatment is vacuum treatment until the vacuum degree is 10-1-10-3Pa. The soldering temperature of the soldering sealing process is 750-850 deg.C, such as 800 deg.C. After the welding and sealing treatment is finished, the temperature is preserved for 1min-2min, and then the vacuum tube 800 is taken out of the vacuum furnace.
In other embodiments, as shown in fig. 2, a metal sheet 851 is disposed between the end seal 803 and the outer pipe 801 and the inner pipe 802; glass frit slurry 852 is arranged between the end sealing member 803 and the metal sheet 851, and the end sealing member 803 is sealed and fixed with the outer pipe 801 and the inner pipe 802 by melting the glass frit slurry 852 and welding the metal sheet 851. The glass powder slurry 852 is used for fixing the metal sheets 851 on the inner surface and the outer surface of the end sealing piece 803 respectively, and then the metal sheets 851 are used for welding to realize the sealing and fixing of the end sealing piece 803, the outer pipe 801 and the inner pipe 802, so that the end sealing piece 803 can be tightly sealed with the outer pipe 801 and the inner pipe 802, and the air leakage caused by the untight sealing can be avoided. The metal sheet 851 may use a metal tape. The metal sheet 851 is made of a material having a thermal expansion coefficient difference between the quartz glass and the stainless steel tube. The metal sheet 851 is a kovar alloy, such as ferrochrome, iron-nickel-cobalt alloy, etc.
The preparation process of the vacuum tube 800 comprises:
coating glass frit paste 852 on the metal sheet 851;
respectively attaching a metal sheet 851 to the inner and outer surfaces of the end seal member 803, heating and melting the metal sheet 851 to fix the metal sheet 851 to the inner and outer surfaces of the end seal member 803, and then clamping the end seal member 803 between the outer pipe 801 and the inner pipe 802;
air between the outer pipe 801 and the inner pipe 802 is pumped out through gaps between the end sealing member 803 and the outer pipe 801 and the inner pipe 802;
the end seal 803 is welded and sealed to the outer pipe 801 and the inner pipe 802.
The temperature for heating and melting is 440-460 ℃, and the slurry can be melted, but the glass can not be melted.
The soldering sealing treatment and the vacuum-pumping treatment are carried out in a vacuum furnace. The vacuum treatment is vacuum treatment until the vacuum degree is 10-1-10-3Pa. The soldering temperature of the soldering sealing process is 750-850 deg.C, such as 800 deg.C. After the welding and sealing treatment is finished, the temperature is preserved for 1min-2min, and then the vacuum tube 800 is taken out of the vacuum furnace.
As shown in fig. 3, in still other embodiments, a silicone layer 861 is disposed between the end sealing member 803 and the outer tube 801 and the inner tube 802, and the end sealing member 803 is adhered to the outer tube 801 and the inner tube 802 by the silicone layer 861. The silicone layer 861 can be used for tightly sealing the end sealing member 803 with the outer pipe 801 and the inner pipe 802, so that air leakage caused by loose sealing can be avoided.
The silica gel is quick-drying silica gel, has the strength performance of structural adhesive and the toughness of the silica gel, has good air tightness, and can be tightly combined with quartz glass and a stainless steel pipe. The thickness of the silicone gel layer 861 is 0.3mm-0.7mm, such as 0.3mm, 0.5mm, 0.7 mm. The thickness of the silica gel layer 861 is 0.3mm-0.7mm, which can give consideration to structural strength, toughness, heat insulation and air release.
Fig. 4 is a schematic structural view of a refrigerator 200 according to an embodiment of the present invention. Fig. 5 is a schematic structural view of a refrigerator 200 according to another embodiment of the present invention. Fig. 6 is a schematic cross-sectional view of the refrigerator 200 shown in fig. 3. Fig. 7 is a schematic cross-sectional view of the vacuum heat insulator 100 according to an embodiment of the present invention. The refrigerator 200 of the present invention includes: one or more storage parts 201, a refrigeration module 202 and an air supply pipeline 300. Each storage portion 201 has a corresponding storage space defined therein. The refrigeration module 202 is disposed separately from the one or more storage portions 201 and configured to cool air entering the refrigeration module 202 to form cooling energy. One end of the air supply pipeline 300 is detachably connected with the refrigeration module 202, and the other end is connected with the storage part 201, and is used for supplying cold energy into the storage part 201, wherein at least one part of the air supply pipeline 300 is the vacuum pipe 800. The vacuum tube 800 is used for air cooling, so that heat loss and condensation can be avoided. According to the refrigerator 200 disclosed by the invention, the refrigeration module 202 and the storage part 201 are separately arranged, so that the storage part 201 does not need to give way for a refrigeration system, and the internal volume of the refrigerator 200 can be greatly increased; refrigeration module 202 sets up independently, can freely match one or more the same or different storing portion 201 as required, is particularly useful for embedded refrigerator, improvement that can be very big to the utilization ratio in space, promotion user experience. For example, the refrigerator 200 shown in fig. 1 includes a storage part 201; the refrigerator 200 shown in fig. 2 includes two storage parts 201. The number of the storage portions 201 may also be two or more, for example, three, four, or the like. Different storing portion 201 can set up in the position of difference, has different sizes, and the storing space can have different temperatures, can satisfy the different demands of user. In the present invention, "separately disposed" means that the bodies are spaced apart by a certain distance, and the electric paths are connected by an additional accessory. The refrigeration module 202 is provided with a cooling port, and one end of the air supply pipeline 300 is detachably connected with the cooling port of the refrigeration module 202. The refrigeration module 202 may be, for example, a compression refrigeration system including an evaporator, a compressor, a heat dissipation fan, and a condenser. As shown in fig. 6, the refrigeration module 202 includes an evaporator bin 600 and a compressor bin 700. An evaporator is disposed in the evaporator compartment 600. The compressor compartment 700 is separated from the evaporator compartment 600 and located behind the evaporator compartment 600, and a compressor, a heat dissipation fan and a condenser are arranged in the compressor compartment 700.
The refrigerator 200 shown in fig. 4 is taken as an example, and the storage part 201, the air supply duct 300, the storage part 201, and the refrigeration module 202 according to the present invention are combined in detail.
The storage part 201 has a cabinet 210 and a door 220, a storage space is defined in the cabinet 210, and the door 220 is disposed at a front side of the cabinet 210 to open and close the storage space. A drawer 280 is also provided in the case 210. The refrigerator 200 also includes a return duct 400 and a threading duct 500. The box body 210 is provided with an air supply mounting port, an air return mounting port and an electric connection mounting port. One end of the air supply pipeline 300 is fixed with the air supply installation port, and the other end is communicated with the refrigeration module 202, so that the cold energy is supplied into the storage part 201 from the refrigeration module 202. The one end and the return air installing port of return air pipeline 400 are fixed, and the other end and refrigeration module 202 intercommunication to the air that flows into in the storing portion 201 is cooled off in the refrigeration module 202. A power supply line is arranged in the threading pipeline 500, one end of the threading pipeline is electrically connected with the installation port to be led into the storage part 201, the other end of the threading pipeline is led into the refrigeration module 202, and circuit connection between the storage part 201 and the refrigeration module 202 is achieved. The air supply line 300 and the air return line 400 adopt the vacuum pipe 800 described above.
At least a portion of the case 210 is the vacuum insulator 100. Fig. 7 is a schematic structural view of the vacuum heat insulator 100 according to an embodiment of the present invention. The vacuum heat insulator 100 includes: a first plate 101, a second plate 102, a seal 103. The second plate 102 is disposed opposite to the first plate 101 at a distance. The sealing member 103 is interposed between the first plate 101 and the second plate 102 to seal and fix the first plate 101 and the second plate 102, and a vacuum chamber 110 is defined between the first plate 101, the second plate 102, and the sealing member 103. The vacuum chamber 110 of the vacuum heat insulator 100 has a vacuum degree of 10-1-10-3Pa. The first plate 101 forms at least a part of an outer shell 211 of the case 210, the second plate 102 forms at least a part of an inner shell 212 of the case 210, and an inner side of the second plate 102 facing away from the first plate 101 is a storage space of the case 210. The case 210 has an air supply port, a return air port, and an electrical connection port formed in the vacuum heat insulator 100, and the first plate 101 and the second plate 102 have a heat insulator 203 around the periphery of the ports. At least a part of the refrigerator body 210 of the refrigerator 200 of the present invention is the vacuum heat insulator 100, which can ensure the heat preservation effect of the refrigerator 200; the vacuum heat insulator 100 can reduce the convection heat transfer by vacuumizing between the two hermetically sealed plates; the sealing member 103 is clamped between the first plate 101 and the second plate 102 to seal and fix the two plates, so that the first plate 101 and the second plate 102 can always keep a certain distance, the whole vacuum heat insulator 100 is stable in structure, and an independent appearance structure is kept.
The box body 210 is formed by using the vacuum heat insulator 100, so that the wall thickness of the refrigerator 200 is kept small, the heat preservation effect of the refrigerator 200 can be guaranteed, meanwhile, the internal volume of the refrigerator 200 can be increased, the vacuum heat insulator is particularly suitable for an embedded refrigerator, the utilization rate of the space can be greatly improved, and the user experience is improved. The refrigerator 200 of the present invention may also be designed for use as part of a smart home. The second plate 102 may be spaced opposite to the first plate 101 in two cases. One is an opposite arrangement in which the body surfaces of the second plate 102 and the first plate 101 are substantially parallel, and a longitudinal sectional view thereof is shown in fig. 7 when the vacuum heat insulator 100 is horizontally placed. The first plate 101 and the second plate 102 are substantially planar plate-shaped structures, and the entire box 210 is formed by splicing a plurality of planar plate-shaped vacuum heat insulators 100. One is that the first plate 101 is a rectangular parallelepiped shape having an opening on one surface, and the second plate 102 is fitted into the first plate 101 at intervals following the opening.
The first plate 101 is made of a metal plate member; the second plate 102 is made of a metal plate member; the seal 103 is made of quartz glass. The two plates are made of metal plates, so that the structure of the vacuum heat insulator 100 is stabilized. Preferably, the first plate 101 is made of a stainless steel plate and the second plate 102 is made of a stainless steel plate. The inner surface of the stainless steel plate may be mirror-finished or evaporated. Such as 304 stainless steel. The use of the stainless steel plate ensures the strength of the vacuum insulator 100, provides an attractive appearance, reduces radiation heat transfer, and prevents gas leakage due to corrosion and corrosion. The sealing member 103 is made of quartz glass, which has the characteristics of low thermal conductivity and low outgassing rate, and can solve the problem of heat transfer of the thermal bridge of the vacuum thermal insulator 100. A sealing structure 104 is also formed between the first and second plates 101 and 102 and the sealing member 103. Because the thermal expansion coefficients of the quartz glass and the stainless steel plate are different by 15 times, the sealing structure 104 needs to have elasticity and can be tightly combined with the quartz glass and the stainless steel plate, so that the tight connection of the quartz glass and the stainless steel plate can be ensured. The sealing structure 104 may include a nickel plating layer and a solder sheet; the upper and lower surfaces of the sealing member 103 respectively form nickel plating layers, silver-copper solder sheets are arranged between the nickel plating layers and the first plate 101 and the second plate 102, and the sealing member is welded with the first plate 101 and the second plate 102 through the nickel plating layers and the silver-copper solder sheets. The sealing structure 104 may also include a kovar sheet and a glass frit paste; kovar alloy sheets are respectively arranged between the sealing piece 103 and the first plate 101 and between the sealing piece 103 and the second plate 102, glass powder slurry is arranged between the sealing piece 103 and the Kovar alloy sheets, and the sealing and fixing of the sealing piece 103 and the first plate 101 and the second plate 102 are realized through the melting of the glass powder slurry and the welding of the Kovar alloy sheets. The sealing structure 104 may also include a silicone layer; and silica gel layers are respectively arranged between the sealing member 103 and the first plate 101 and between the sealing member 103 and the second plate 102, and the sealing member 103 is sealed and fixed with the first plate 101 and the second plate 102 through bonding of the silica gel layers. The vacuum heat insulator 100 may further include: a plurality of supports 105, disposed within the vacuum chamber 110, are configured to be secured to the first plate 101 and/or the second plate 102 to provide support between the first plate 101 and the second plate 102. By providing a plurality of supporting members 105 in the vacuum chamber 110, it is possible to provide support to the first plate 101 and the second plate 102, enhancing the strength of the entire vacuum heat insulator 100; the support members 105 are directly fixed to the first plate 101 and/or the second plate 102, so that the process of disposing the support members 105 is simplified and the manufacturing process of the entire vacuum heat insulator 100 is simplified. The support member 105 is preferably made of quartz glass or teflon, and is adhesively fixed to the first plate 101 and/or the second plate 102 using epoxy resin or silicon gel.
Fig. 8 is a schematic view illustrating the storage part 201 and the air supply duct 300 of the refrigerator 200 shown in fig. 4, and is a partially enlarged view of a portion F of fig. 6. Referring to fig. 8, an air supply joint 341 is disposed outside an outlet end of the air supply pipeline 300, and the air supply joint 341 passes through an air supply installation opening formed in the box 210. The fixing member 351 is screw-coupled to the air supply connector 341 in the case 210, thereby fixing the air supply line 300 to the air supply connector 341. The fixing of the air supply pipeline 300 and the box body 210 is realized by utilizing the matching of the air supply connector 341 and the fixing piece 351, the structure is ingenious, the installation is simple, and the stability is good. Specifically, the end seal 803 has a first section 831 located between the outer tube 801 and the inner tube 802, and a second section 832 extending beyond the ends of the outer tube 801 and the inner tube 802. The air supply connection 341 is snap-fitted to the second section 832 of the end seal 803. The air supply joint 341 has a joint base 3411 and a joint protrusion 3412, an inner side surface of the joint base 3411 is attached to the outer shell 211, an end portion of the joint protrusion 3412 protrudes from the inner shell 212, and an outer side surface of the protruding portion is provided with a thread structure corresponding to the thread structure of the fixing member 351. A rubber packing 360 is further provided in a contact area between the air supply joint 341 and the case 210.
Fig. 9 is a schematic diagram of the refrigeration module 202 and the air supply duct 300 of the refrigerator 200 shown in fig. 4, and is a partially enlarged view of a portion H in fig. 6. Referring to fig. 9, an air supply joint 342 is provided outside an inlet end of the air supply pipe 300, and the air supply joint 342 passes through a cooling port of the refrigeration module 202. The fixing member 352 is screwed with the air supply joint 342 in the evaporator chamber 600, thereby fixing the air supply pipe 300 and the refrigeration module 202. The air supply joint 342 is matched with the fixing piece 352 to fix the air supply pipeline 300 and the refrigeration module 202, and the air supply pipeline is ingenious in structure, simple to install and good in stability. Specifically, the end seal 803 has a first section 831 located between the outer tube 801 and the inner tube 802, and a second section 832 extending beyond the ends of the outer tube 801 and the inner tube 802. The air supply connection 342 is snap-fitted to the second section 832 of the end seal 803. The air supply joint 342 has a joint base 3421 and a joint protrusion 3422, the inner side of the joint base 3421 is attached to the refrigeration module 202, the end of the joint protrusion 3422 is beyond the cooling port, and the outer side of the exceeding portion is provided with a thread structure corresponding to the thread structure of the fixing member 352. A rubber sealing ring 360 is also provided at the contact area between the air supply joint 342 and the refrigeration module 202.
The vacuum tube 800 of the embodiment of the invention can reduce convection heat transfer by vacuumizing between two layers of sealed tubes; the end sealing member 803 is clamped between the two layers of tubes to seal and fix the outer tube 801 and the inner tube 802, so that the outer tube 801 and the inner tube 802 can always keep a certain distance, the whole vacuum tube 800 is stable in structure, an independent appearance structure is kept, and the vacuum chamber 810 can also keep a stable vacuum state.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A vacuum tube, comprising: the outer pipe is sleeved outside the inner pipe and arranged at intervals with the inner pipe; the end seal is configured to be sandwiched between the outer tube and the inner tube to sealingly secure the outer tube and the inner tube, and a vacuum cavity is defined between the outer tube, the inner tube, and the end seal.
2. The vacuum tube according to claim 1,
the outer pipe is made of a metal pipe fitting;
the inner pipe is made of a metal pipe fitting;
the end seal is made of quartz glass.
3. The vacuum tube according to claim 2,
the end seal is an annular member.
4. The vacuum tube according to claim 1,
the end sealing piece is respectively provided with a nickel plating layer on the inner surface and the outer surface;
and welding sheets are arranged between the nickel plating layer and the outer pipe and between the nickel plating layer and the inner pipe, and the end part sealing piece is welded with the outer pipe and the inner pipe to be fixed in a sealing manner through the nickel plating layer and the welding sheets.
5. The vacuum tube according to claim 4,
the solder sheet is a silver copper solder sheet.
6. The vacuum tube according to claim 1,
a metal sheet is arranged between the end part sealing piece and the outer pipe and between the end part sealing piece and the inner pipe;
and glass powder slurry is arranged between the end sealing piece and the metal sheet, and the end sealing piece, the outer pipe and the inner pipe are sealed and fixed by melting the glass powder slurry and welding the metal sheet.
7. The vacuum tube according to claim 6,
the metal sheet is a kovar sheet.
8. The vacuum tube according to claim 1,
the end sealing piece is connected with the outer pipe and the inner pipe in a sealing mode, a silica gel layer is arranged between the end sealing piece and the outer pipe and between the end sealing piece and the inner pipe, and the end sealing piece is bonded with the outer pipe and the inner pipe in a sealing mode.
9. The vacuum tube according to claim 1,
the length of the end part sealing piece clamped between the outer pipe and the inner pipe is 10mm-15 mm;
the distance between the outer pipe and the inner pipe is 0.5mm-20 mm;
the inner diameter of the inner tube is 3 to 5 times the distance between the outer tube and the inner tube.
10. A refrigerator, characterized by comprising:
one or more storage portions, each of which defines a corresponding storage space therein;
the refrigeration module is arranged away from the one or more storage parts and is configured to cool air entering the refrigeration module to form cold energy; and
an air supply pipeline, one end of which is detachably connected with the refrigeration module and the other end of which is connected with the storage part and is used for supplying the cold energy into the storage part, wherein at least one part of the air supply pipeline is the vacuum pipe according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010011070.2A CN113074493B (en) | 2020-01-06 | 2020-01-06 | Vacuum tube and refrigerator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010011070.2A CN113074493B (en) | 2020-01-06 | 2020-01-06 | Vacuum tube and refrigerator |
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| CN113074493A true CN113074493A (en) | 2021-07-06 |
| CN113074493B CN113074493B (en) | 2022-08-23 |
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| SE8103518L (en) * | 1981-06-04 | 1982-12-05 | Nyby Uddeholm Ab | CAPSULE |
| JPS6020053A (en) * | 1983-07-13 | 1985-02-01 | Hitachi Chem Co Ltd | Manufacture of vacuum tube for solar heat collector |
| CN2712929Y (en) * | 2004-07-29 | 2005-07-27 | 江希年 | Glass metal pair transition connector |
| CN101498517A (en) * | 2009-02-23 | 2009-08-05 | 四川大学 | Solar high-temperature vacuum heat-collecting tube |
| CN202547161U (en) * | 2012-05-04 | 2012-11-21 | 丁凤根 | Vacuum pipe of solar water heater |
| CN106641589A (en) * | 2016-12-19 | 2017-05-10 | 成都科瑞尔低温设备有限公司 | Micro-compensation end face flange |
| CN208692318U (en) * | 2018-07-27 | 2019-04-05 | 吴丽仙 | A kind of electronic cured tobacco device vacuum tube |
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2020
- 2020-01-06 CN CN202010011070.2A patent/CN113074493B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE8103518L (en) * | 1981-06-04 | 1982-12-05 | Nyby Uddeholm Ab | CAPSULE |
| JPS6020053A (en) * | 1983-07-13 | 1985-02-01 | Hitachi Chem Co Ltd | Manufacture of vacuum tube for solar heat collector |
| CN2712929Y (en) * | 2004-07-29 | 2005-07-27 | 江希年 | Glass metal pair transition connector |
| CN101498517A (en) * | 2009-02-23 | 2009-08-05 | 四川大学 | Solar high-temperature vacuum heat-collecting tube |
| CN202547161U (en) * | 2012-05-04 | 2012-11-21 | 丁凤根 | Vacuum pipe of solar water heater |
| CN106641589A (en) * | 2016-12-19 | 2017-05-10 | 成都科瑞尔低温设备有限公司 | Micro-compensation end face flange |
| CN208692318U (en) * | 2018-07-27 | 2019-04-05 | 吴丽仙 | A kind of electronic cured tobacco device vacuum tube |
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| CN113074493B (en) | 2022-08-23 |
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