Metal vacuum insulation panel packaging method and metal vacuum insulation panel

Abstract

The invention discloses a method for packaging a metal vacuum insulated panel. The method comprises the following steps: step 1, placing a panel body arranged in the atmosphere in a vacuum cavity; wherein the plate body comprises an upper barrier piece, a lower barrier piece, a core material, an adsorbent and a heat sealing adhesive; secondly, the plate body is vacuumized in the vacuum cavity; step 3, pressurizing and heating the upper barrier piece and / or the lower barrier piece in the vacuum cavity to melt the hot sealing glue between the upper barrier piece and the lower barrier piece, so as to realize glue sealing of the upper barrier piece and the lower barrier piece together; 4, breaking vacuum, and taking out the vacuum insulation panel manufactured in the vacuum cavity; and step 5, welding and packaging the edge of the vacuum insulated panel under atmospheric pressure. The invention further discloses the metal vacuum insulation panel. Air extraction is performed in the vacuum chamber, the air extraction efficiency is high, then pre-sealing is performed, and finally welding packaging is performed under atmospheric pressure, so that an air extraction hole does not need to be formed, the sealing effect is good, the efficiency is higher, and air leakage is not likely to occur.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum insulation panels, and in particular to a metal vacuum insulation panel packaging method and a metal vacuum insulation panel. Background Art

[0002] Vacuum insulation panels are a new type of thermal insulation material, which is composed of a filling core material and a vacuum protective surface layer. It is currently the most advanced and efficient thermal insulation material in the world. The main advantages of vacuum insulation panels are good thermal insulation performance, thin thickness, and light unit weight. It can effectively avoid heat transfer caused by air convection, so the thermal conductivity can be greatly reduced, and it has the characteristics of energy saving and environmental protection.

[0003] In order to improve the heat resistance of vacuum insulation panels, some metal vacuum insulation panels are disclosed in the prior art. The preparation method of the metal vacuum insulation panels in the prior art is usually: after packaging under atmospheric pressure, an exhaust hole is set on the barrier film, and then a vacuum device is used to exhaust air in the panel through the exhaust hole, and finally the exhaust hole is sealed to obtain the metal vacuum insulation panel. The defects are: the exhaust efficiency is low, it is difficult to obtain a good vacuum degree in the panel, and after the exhaust hole is sealed, the sealing effect of the exhaust hole is not good enough, so that the metal vacuum insulation panel is prone to leakage at the sealing position of the exhaust hole during long-term use. Summary of the invention

[0004] Based on the above-mentioned problems existing in the prior art, an object of an embodiment of the present application is to provide a metal vacuum insulation panel packaging method, which performs vacuuming in a vacuum chamber with high vacuuming efficiency, then performs pre-sealing, and finally performs welding packaging under atmospheric pressure, thereby eliminating the need to set vacuum holes, achieving good sealing effect, and preventing air leakage.

[0005] The second purpose of the embodiment of the present application is to provide a metal vacuum insulation panel.

[0006] The technical solution adopted by the present application to solve the technical problem is: a metal vacuum insulation panel packaging method, comprising the following steps:

[0007] Step 1: placing the plate body arranged under the atmosphere into a vacuum chamber; wherein the plate body comprises an upper barrier, a lower barrier, a core material, an adsorbent and a heat-sealing adhesive, the core material and the adsorbent are located between the upper barrier and the lower barrier, the heat-sealing adhesive is located at the edge sealing position of the upper barrier and the lower barrier, and an air extraction channel is formed between the heat-sealing adhesive and the upper barrier and the lower barrier;

[0008] Step 2: evacuate the plate in the vacuum chamber, and the gas in the core material is evacuated to the outside through the evacuation channel;

[0009] Step three, pressurizing and heating the upper barrier and / or the lower barrier in the vacuum chamber to melt the heat-sealing adhesive between the upper barrier and the lower barrier, thereby sealing the upper barrier and the lower barrier together;

[0010] Step 4, breaking the vacuum and taking out the vacuum insulation panel made in the vacuum chamber;

[0011] Step 5: Under atmospheric pressure, the glue sealing area of ​​the vacuum insulation panel is welded and sealed.

[0012] Furthermore, in step five, the sealing area of ​​the vacuum insulation panel is welded and packaged to form a welding ring that is closed from beginning to end; and step six is ​​also included, and step six is: cutting and trimming the sealing area located outside the welding ring.

[0013] Furthermore, the heat-sealing adhesive is in a ring shape, and after melting, the heat-sealing adhesive is heat-sealed with the upper barrier and the lower barrier to form a sealing area; the welding ring is located inside the sealing area.

[0014] Furthermore, the upper barrier is an upper metal barrier film made of stainless steel foil or alloy material, and the lower barrier is a lower metal barrier film made of stainless steel foil or alloy material.

[0015] Furthermore, the upper barrier is a metal barrier film made of stainless steel foil or alloy material, and the lower barrier is a barrier bottom shell formed by stamping of stainless steel foil or alloy material.

[0016] Furthermore, the core material is made of one or more materials of centrifugal wool, basalt, gas silica, and high silica glass fiber.

[0017] Furthermore, the adsorbent is made of one or more materials of barium-lithium alloy, cobalt oxide, vanadium, zirconium, and iron.

[0018] Furthermore, the heat sealing adhesive is EVA, PES, PE, PA, SBS, or EAA hot melt adhesive.

[0019] Furthermore, the heat sealant is made of EVA or PES hot melt adhesive by dispensing. The PES heat sealant or EVA heat sealant is adhered to the edge of the lower barrier member by an annular dispensing method.

[0020] Furthermore, in step 2, the plate is evacuated in a vacuum chamber, and the vacuum degree in the vacuum chamber is 0.01Pa-50Pa.

[0021] Furthermore, in step three, the heat sealing temperature of the heat sealing adhesive made of EVA material is 50°C-150°C, and the heat sealing time is 60S-120S; the heat sealing temperature of the heat sealing adhesive made of PES material is 110°C-210°C, and the heat sealing time is 60S-120S.

[0022] Furthermore, the heat-sealing adhesive is a hot-melt adhesive film, and the hot-melt adhesive film is fixed on the lower barrier member by using double-sided adhesive.

[0023] Further, in step five, the welding packaging method is laser welding or resistance welding.

[0024] Furthermore, in step five, the edge of the vacuum insulation panel is packaged by laser welding, and the peel strength of the vacuum insulation panel after laser welding is 20N / mm-60N / mm.

[0025] Furthermore, the surface of the upper barrier and / or the lower barrier is coated with insulating paint.

[0026] The technical solution adopted by the present application to solve the technical problem is: a metal vacuum insulation panel, which is made by the above packaging method.

[0027] The beneficial effects of the present application are as follows: after the plate body is arranged, the plate body is placed in a vacuum chamber for vacuuming. Since an exhaust gas flow channel is formed between the heat seal adhesive and the upper and lower barriers, it is convenient to extract the gas in the core material through the exhaust gas flow channel. After the vacuum degree is exhausted to a predetermined value, the upper barrier and / or the lower barrier are pressurized and heated in the vacuum chamber, so that the heat seal adhesive melts. After the heat seal adhesive melts, the upper and lower barriers are heat-sealed together to achieve pre-sealing of the upper and lower barriers. In a high temperature environment, the heat seal adhesive of the pre-sealed metal vacuum insulation panel will melt again, which will cause the metal vacuum insulation panel to leak. In order to solve this problem, the pre-sealed metal vacuum insulation panel is laser welded under normal temperature atmosphere. Laser welding realizes the upper and lower barriers to be firmly connected together, so that the metal vacuum insulation panel is not easy to leak under high temperature environment. Therefore, the present invention is pre-sealed and then laser welded and packaged at normal temperature in the atmosphere, so that the sealing of the metal vacuum insulation panel is firm and reliable, and the airtightness is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 An exploded view of the metal vacuum insulation panel in this application;

[0029] Figure 2 This is an exploded view of a metal vacuum insulation panel according to another embodiment of the present application;

[0030] Figure 3 It is a schematic diagram of the structure of the metal vacuum insulation panel in this application.

[0031] Description of Reference Numerals

[0032] Upper barrier 1, lower barrier 2, core material 3, adsorbent 4, heat sealing adhesive 5, welding ring 6. DETAILED DESCRIPTION

[0033] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0034] like Figures 1 to 3 As shown, a metal vacuum insulation panel packaging method of the present invention comprises the following steps:

[0035] Step 1, placing the plate body arranged under the atmosphere in a vacuum chamber; wherein the plate body includes an upper barrier 1, a lower barrier 2, a core material 3, an adsorbent 4 and a heat-sealing adhesive 5, the core material 3 and the adsorbent 4 are located between the upper barrier 1 and the lower barrier 2, the heat-sealing adhesive 5 is located at the edge sealing position of the upper barrier 1 and the lower barrier 2, and an exhaust gas channel is formed between the heat-sealing adhesive 5 and the upper barrier 1 and the lower barrier 2; Step 2, evacuating the plate body in the vacuum chamber, and the gas in the core material 3 is exhausted to the outside through the exhaust gas channel; Step 3, pressurizing and heating the upper barrier 1 and / or the lower barrier 2 in the vacuum chamber to melt the heat-sealing adhesive 5 between the upper barrier 1 and the lower barrier 2, so as to seal the upper barrier 1 and the lower barrier 2 together; Step 4, breaking the vacuum and taking out the vacuum insulation panel made in the vacuum chamber; Step 5, welding and encapsulating the sealing area of ​​the vacuum insulation panel under atmospheric pressure.

[0036] Thus, the present invention relates to a packaging method for a metal vacuum insulation panel. After the panel body is arranged, the panel body is placed in a vacuum chamber for evacuation. Since an evacuation flow channel is formed between the heat seal adhesive 5 and the upper barrier 1 and the lower barrier 2, it is convenient to evacuate the gas in the core material 3 through the evacuation flow channel. After the vacuum is evacuated to a predetermined value, the upper barrier 1 and / or the lower barrier 2 are pressurized and heated in the vacuum chamber, so that the heat seal adhesive 5 melts. After the heat seal adhesive 5 melts, the upper barrier 1 and the lower barrier 2 are heat-sealed together to achieve pre-sealing of the upper barrier 1 and the lower barrier 2. When the pre-sealed metal vacuum insulation panel is placed in a high temperature environment, the heat seal adhesive 5 will melt again, which will cause the metal vacuum insulation panel to leak. In order to solve this problem, the pre-sealed metal vacuum insulation panel is laser welded in a normal temperature atmosphere. Laser welding is used to firmly connect the upper barrier 1 and the lower barrier 2 together, so that the metal vacuum insulation panel is not easy to leak in a high temperature environment. Therefore, the present invention performs pre-sealing and then performs laser welding packaging at room temperature in the atmosphere, so that the sealing of the metal vacuum insulation panel is firm and reliable with good airtightness.

[0037] In a preferred embodiment, in step five, the glue sealing area of ​​the vacuum insulation panel is welded and packaged to form a weld ring 6 that is closed from beginning to end; and step six is ​​also included, which is: cutting and trimming the glue sealing area located outside the weld ring 6. After the vacuum insulation panel is laser welded and packaged to form a weld ring 6 that is closed from beginning to end, laser welding is used to firmly connect the upper barrier 1 and the lower barrier 2 together, and the laser welding seal is firm and reliable with good airtightness. At this time, the edge seal formed by the glue sealing area located outside the weld ring 6, on the one hand, has the problem that the metal vacuum insulation panel is not easy to place, and on the other hand, it will also increase the boundary effect. Therefore, in step six, the glue sealing area located outside the weld ring 6 is cut and trimmed, so that the metal vacuum insulation panel has a narrower edge seal to reduce the boundary effect.

[0038] In this embodiment, the heat-sealing adhesive 5 is in a ring shape. After the heat-sealing adhesive 5 melts, it is heat-sealed together with the upper barrier 1 and the lower barrier 2 to form a sealing area. The welding ring 6 is located on the inner side of the sealing area. When the sealing area is cut and trimmed, the welding ring 6 will not be affected. According to the different shapes of the vacuum insulation panels, the heat-sealing adhesive 5 can be in a circular ring shape or a circular shape.

[0039] like Figure 2 As shown, in this embodiment, the upper barrier 1 is an upper metal barrier film made of stainless steel foil or alloy material, and the lower barrier 2 is a lower metal barrier film made of stainless steel foil or alloy material, so that a bag-type metal vacuum insulation panel can be made. Figure 1 As shown, the upper barrier 1 is a metal barrier film made of stainless steel foil or alloy material, and the lower barrier 2 is a barrier bottom shell formed by stamping stainless steel foil or alloy material, so that a shell-type metal vacuum insulation panel can be made.

[0040] Furthermore, the core material 3 is made of one or more materials such as centrifugal cotton, basalt, gas silicon, and high silica glass fiber. Different core materials 3 can be selected according to different needs. After testing, the thermal conductivity of the metal vacuum insulation board made by this packaging method using the centrifugal cotton core material is 2.1-2.4mw / m·K; the thermal conductivity of the metal vacuum insulation board made by this packaging method using the basalt core material is <5mw / m·K; the thermal conductivity of the metal vacuum insulation board made by this packaging method using the gas silicon core material + basalt core material is <10mw / m·K.

[0041] Furthermore, the adsorbent 4 is made of one or more materials of barium-lithium alloy, cobalt oxide, vanadium, zirconium, and iron. The adsorbent 4 absorbs the residual water vapor in the core material 3, so that the metal vacuum insulation panel maintains a good thermal insulation effect.

[0042] The heat seal adhesive 5 in this embodiment is preferably made of EVA or PES hot melt adhesive. PES refers to polyethersulfone, which is a high-performance thermoplastic engineering plastic with excellent heat resistance, chemical corrosion resistance, high voltage electrical resistance, self-lubrication and low friction coefficient. After the PES heat seal adhesive is melted under pressure and heating, the upper barrier 1 and the lower barrier 2 are firmly heat-sealed together.

[0043] Preferably, PES heat-sealing glue is adhered to the edge of the lower barrier by means of a ring-shaped dispensing method. Before packaging, PES heat-sealing glue is adhered to the edge of the lower barrier by means of a ring-shaped dispensing method, and then the core material 3 is placed on the lower barrier 2, the adsorbent 4 is placed on the core material 3, and finally the upper barrier 1 is placed on the core material 3. Positioning is performed by using a dispensing method to prevent the PES heat-sealing glue from being displaced, thereby ensuring that the upper barrier 1 and the lower barrier 2 can be heat-sealed together.

[0044] In this embodiment, in step 2, the plate body is evacuated in the vacuum chamber, and the vacuum degree in the vacuum chamber is 0.01Pa-50Pa. Preferably, the vacuum degree in the vacuum chamber is less than 5Pa, so that the upper barrier 1 and the lower barrier 2 are heat-sealed together in the high vacuum chamber, and the metal vacuum insulation panel has a good thermal insulation effect.

[0045] In a preferred embodiment of the present invention, in step 3, the heat sealing temperature of the heat sealing adhesive made of EVA material is 50℃-150℃, and the heat sealing time is 60S-120S; the heat sealing temperature of the heat sealing adhesive made of PES material is 110℃-210℃, and the heat sealing time is 60S-120S. After testing, it was found that at this temperature and time, the upper barrier 1 and the lower barrier 2 can be firmly heat-sealed together.

[0046] The heat seal adhesive 5 is a hot melt adhesive film, which is fixed to the lower barrier member by double-sided adhesive. The hot melt adhesive film is a derivative product of hot melt adhesive, which is an environmentally friendly adhesive that needs to be heated at high temperature and melted to bond various materials. The hot melt adhesive film is fixed by double-sided adhesive, so that the lower barrier member 2 is accurately heat-sealed with the upper barrier member 1. In this embodiment, the heat seal adhesive 5 can also be PE, PA, SBS, EAA and other heat seal adhesives.

[0047] Further, in step 5, the welding packaging method is laser welding or resistance welding. In the case where the upper barrier 1 and the lower barrier 2 are relatively thick, resistance welding can be used. Resistance welding generally applies a certain pressure to the workpiece to be welded, uses the workpiece as a load resistor, supplies power to the workpiece through the upper and lower electrodes, and uses the Joule heat generated by the current passing through the workpiece to melt the contact surface between the two workpieces to achieve the connection of the two contact surfaces. Resistance welding is suitable for thicker plates.

[0048] Preferably, in step 5, the edge of the vacuum insulation panel is encapsulated by laser welding, and the peel strength of the vacuum insulation panel after laser welding is 20N / mm-60N / mm. After laser welding, the peel strength of the vacuum insulation panel after laser welding is relatively large, so that the sealing effect of the upper barrier 1 and the lower barrier 2 is good and it is not easy to leak.

[0049] In order to improve the insulation of the metal vacuum insulation panel, the surface of the upper barrier 1 and / or the lower barrier 2 is coated with an insulating coating, such as an electrical insulating coating, to achieve an insulation-resistant effect.

[0050] The invention also discloses a metal vacuum insulation panel, which is manufactured by adopting the packaging method.

[0051] In summary, the metal vacuum insulation panel made by the packaging method has a firm and reliable seal and good airtightness. The upper barrier 1 and the lower barrier 2 are made of stainless steel foil or alloy material, and have the characteristics of acid and alkali resistance, puncture resistance, high and low temperature resistance and non-flammability. The operating temperature range is -196℃-600℃, and it can work at a maximum of 800℃. The metal vacuum insulation panel is suitable for aerospace, energy storage, new energy batteries, high-temperature home appliances and equipment, LNG pipeline insulation and other fields.

[0052] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for packaging a metal vacuum insulation panel, characterized in that: The following steps are involved: Step 1: placing the plate body arranged under the atmosphere into a vacuum chamber; wherein the plate body comprises an upper barrier, a lower barrier, a core material, an adsorbent and a heat-sealing adhesive, the core material and the adsorbent are located between the upper barrier and the lower barrier, the heat-sealing adhesive is located at the edge sealing position of the upper barrier and the lower barrier, and an air extraction channel is formed between the heat-sealing adhesive and the upper barrier and the lower barrier; Step 2: evacuate the plate in the vacuum chamber, and the gas in the core material is evacuated to the outside through the evacuation channel; Step three, pressurizing and heating the upper barrier and / or the lower barrier in the vacuum chamber to melt the heat-sealing adhesive between the upper barrier and the lower barrier, thereby sealing the upper barrier and the lower barrier together; Step 4, breaking the vacuum and taking out the vacuum insulation panel made in the vacuum chamber; Step 5: Under atmospheric pressure, the glue sealing area of ​​the vacuum insulation panel is welded and sealed.

2. The metal vacuum insulation panel packaging method according to claim 1, characterized in that: In step five, the sealing area of ​​the vacuum insulation panel is welded and packaged to form a welding ring closed from beginning to end; and step six is ​​also included, wherein the sealing area located outside the welding ring is cut and trimmed.

3. The metal vacuum insulation panel packaging method according to claim 1, characterized in that: The heat-sealing adhesive is in a ring shape, and after being melted, the heat-sealing adhesive is heat-sealed together with the upper barrier piece and the lower barrier piece to form an adhesive sealing area.

4. The metal vacuum insulation panel packaging method according to claim 1, characterized in that: The upper barrier is an upper metal barrier film made of stainless steel foil or alloy material, and the lower barrier is a lower metal barrier film made of stainless steel foil or alloy material.

5. The metal vacuum insulation panel packaging method according to claim 1, characterized in that: The upper barrier is a metal barrier film made of stainless steel foil or alloy material, and the lower barrier is a barrier bottom shell formed by stamping of stainless steel foil or alloy material.

6. The metal vacuum insulation panel packaging method according to claim 1, characterized in that: The core material is made of one or more materials including centrifugal cotton, basalt, gas silica, and high silica glass fiber.

7. The metal vacuum insulation panel packaging method according to claim 1, characterized in that: The adsorbent is made of one or more materials of barium-lithium alloy, cobalt oxide, vanadium, zirconium and iron.

8. The metal vacuum insulation panel packaging method according to claim 1, characterized in that: The heat sealing adhesive is EVA, PES, PE, PA, SBS, EAA hot melt adhesive; the heat sealing temperature of the heat sealing adhesive is 50℃-210℃, and the heat sealing time is 60S-120S.

9. The metal vacuum insulation panel packaging method according to claim 1, characterized in that: In step five, the welding packaging method is laser welding or resistance welding.

10. A metal vacuum insulation panel, characterized in that: The packaging method is adopted as claimed in any one of claims 1 to 9.

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