WO2023274022A1 - 隔热板材及其制备方法以及应用该隔热板材的冰箱 - Google Patents

隔热板材及其制备方法以及应用该隔热板材的冰箱 Download PDF

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Publication number
WO2023274022A1
WO2023274022A1 PCT/CN2022/100768 CN2022100768W WO2023274022A1 WO 2023274022 A1 WO2023274022 A1 WO 2023274022A1 CN 2022100768 W CN2022100768 W CN 2022100768W WO 2023274022 A1 WO2023274022 A1 WO 2023274022A1
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Prior art keywords
heat insulation
core material
annular groove
heat
vacuum
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PCT/CN2022/100768
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English (en)
French (fr)
Inventor
刘站站
王海娟
程学丽
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青岛海尔特种制冷电器有限公司
青岛海尔电冰箱有限公司
海尔智家股份有限公司
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Application filed by 青岛海尔特种制冷电器有限公司, 青岛海尔电冰箱有限公司, 海尔智家股份有限公司 filed Critical 青岛海尔特种制冷电器有限公司
Priority to AU2022300959A priority Critical patent/AU2022300959A1/en
Priority to EP22831838.2A priority patent/EP4365474A1/en
Publication of WO2023274022A1 publication Critical patent/WO2023274022A1/zh

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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
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F25D23/062—Walls defining a cabinet
    • F25D23/064—Walls defining a cabinet formed by moulding, e.g. moulding in situ
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/06—Arrangements using an air layer or vacuum
    • F16L59/065—Arrangements using an air layer or vacuum using vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/04—Arrangements using dry fillers, e.g. using slag wool which is added to the object to be insulated by pouring, spreading, spraying or the like
    • 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
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • 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
    • F25D23/00—General constructional features
    • F25D23/06—Walls
    • F25D23/065—Details
    • 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
    • F25D2201/00—Insulation
    • F25D2201/10—Insulation with respect to heat
    • F25D2201/14—Insulation with respect to heat using subatmospheric pressure

Definitions

  • the invention relates to the field of refrigeration appliances, in particular to a heat insulating board, a preparation method thereof and a refrigerator using the heat insulating board.
  • Vacuum insulation panel is a kind of vacuum insulation material, which is composed of filling core material and vacuum protection surface layer, which can effectively avoid heat transfer caused by air convection.
  • the application of vacuum insulation panels on refrigerators is to directly attach flat vacuum insulation panels to the relatively flat surface of the refrigerator shell, and then fill them with foam.
  • vacuum insulation panels often use aluminum foil. Or the material of evaporated aluminum is used as the coating material. Due to the high heat transfer coefficient of aluminum, the heat is directly transferred from one side to the other side through the coating material, resulting in a "thermal bridge effect" on the edge of the vacuum insulation panel. , the edge energy saving of the vacuum insulation panel is poor.
  • the existing technical solution is that when the vacuum insulation panels are attached to the outer shell of the refrigerator, a layer of thermal insulation material with a small thickness is added between them for transition. Since the size of the thermal insulation material is smaller than the size of the vacuum insulation panels, the edge of the vacuum insulation panels is at In the suspended state, when the polyurethane is foamed, due to the disorder of the foam material and the small thickness of the suspended space, the polyurethane will not be filled, and then there will be voids, affecting the appearance and other quality defects.
  • the object of the present invention is to provide a heat insulation board and its preparation method and a refrigerator using the heat insulation board to solve the above problems.
  • an embodiment of the present invention provides a heat insulation panel, including a vacuum insulation panel and a heat insulation material;
  • the vacuum insulation panel includes a core material and a coating material, and one side of the core material is open There is an annular groove, the coating material wraps the core material, and a vacuum is formed between the core material and the coating material; the heat insulating material is arranged in the annular groove wrapped by the coating material, so The thermal insulation material is located on the same plane as the vacuum insulation panel, and the thermal resistance of the thermal insulation material is higher than that of the coating material.
  • the heat insulation board further includes: the coating material is aluminum foil or evaporated aluminum.
  • the heat insulation board further includes: the core material is at least one of glass fiber, glass wool and fumed silica.
  • the heat insulation board further includes: the heat insulation material is at least one of foamed styrene, foamed polyurethane, foamed polyethylene, and foamed polypropylene.
  • the heat insulation board further includes: the thickness of the annular groove is 1/2-2/3 of the thickness of the core material.
  • the heat insulation board further includes: one side end surface of the annular groove is flush with the side end surface of the core material, so that the bonded end surface of the heat insulation material and the The end faces of the vacuum insulation panels are on the same plane.
  • the heat insulation board further includes: a getter is placed inside the core material.
  • an embodiment of the present invention provides a refrigerator, which includes an outer shell and an inner container, and the heat insulation board and foamed polyurethane as described in the above technical solution are arranged between the refrigerator outer shell and the inner container, and The surface where the heat insulating material is located is attached to the refrigerator shell.
  • an embodiment of the present invention provides a method for preparing a heat-insulating board, the method comprising the following steps: processing one side of the prepared core material into an annular groove; Put it into a prefabricated film-coated material bag; vacuumize and heat-seal the core material and film-coated material bag to obtain a vacuum insulation panel with an annular groove; mold the heat-insulating material according to the size of the annular groove, The thermal resistance of the thermal insulation material is higher than the thermal resistance of the coating material; the cut thermal insulation material is bonded in the annular groove of the vacuum insulation panel, wherein the thermal insulation material and the vacuum insulation panel are located on the same plane, .
  • the preparation method of the heat insulation board further includes: the core material is integrally formed or made into a unit size and then laminated.
  • the heat insulation board and its preparation method disclosed in the present invention reduce the heat transferred to the edge and inside of the vacuum insulation board through the heat insulation material, and reduce the heat loss at the edge of the vacuum insulation board.
  • the "thermal bridge effect" has played a good thermal insulation effect.
  • Fig. 1 is a schematic longitudinal sectional view of a refrigerator according to an embodiment of the present invention
  • Fig. 2 is a schematic cross-sectional view of a heat insulating board according to an embodiment of the present invention
  • Fig. 3 is a schematic cross-sectional view of a vacuum insulation panel according to an embodiment of the present invention.
  • Fig. 4 is a flowchart of a method for preparing a heat insulating board according to an embodiment of the present invention.
  • an embodiment of the present invention provides a refrigerator 1, comprising an outer shell 11 and an inner container 13, and a heat insulating board 3 and a foamed polyurethane 5 are arranged between the refrigerator outer shell 11 and the inner container 13, and the The surface where the heat insulating material 3 is located is attached to the refrigerator casing 11 .
  • a heat insulation panel 3 provided by an embodiment of the present invention includes a vacuum insulation panel 31 and a heat insulation material 33 .
  • the vacuum insulation panel 31 includes a core material 311 and a coating material 313, and an annular groove 315 is opened on one side of the core material 311, and the coating material 313 wraps the core material 311. A vacuum is formed between the core material 311 and the coating material 313 .
  • the core material 311 can be at least one of glass fiber, glass wool, and fumed silica;
  • the coating material 313 can be a material that can block external air such as aluminum foil or evaporated aluminum;
  • the material 33 can be at least one of foamed styrene, foamed polyurethane, foamed polyethylene, and foamed polypropylene.
  • a getter 317 may be placed inside the core material 311 for absorbing the escaped gas in the core material 311 to further maintain the vacuum degree in the vacuum insulation panel 31 .
  • annular groove 315 is opened on one side of the core material 311. Since the coating material 313 is selected from flexible materials such as aluminum foil or evaporated aluminum, it can be understood that the coating material 313 wraps the core material 311 and forms a vacuum.
  • the vacuum insulation panel 31 also has an annular groove 315 structure.
  • the heat insulation material 33 is arranged in the annular groove 315 wrapped by the film material 313, the heat insulation material 33 and the The vacuum insulation panels 31 are located on the same plane, the heat resistance of the insulation material 33 is higher than that of the coating material 313, and the heat from the outside of the refrigerator is transferred to the edge of the vacuum insulation panel 31 and the heat inside the refrigerator through the edge of the insulation material 33 Reduced, reducing the "thermal bridging effect" at the edge of the vacuum insulation panel, which also reduces the heat transfer to the interior of the refrigerator.
  • the upper surface of the heat insulation material 33 is located on the same plane as the vacuum insulation panel 31, so that the heat insulation panel 3 has a flat surface, which is convenient for being attached to a refrigerator shell and other application scenarios.
  • the thickness of the annular groove 315 can be 1/2-2/3 of the thickness of the core material 311, and the annular groove 315 can be arranged near the edge of the core material 311. Further, the annular groove 315 can be It is arranged at a position where one side end surface is flush with the side end surface of the core material 311. Since the heat insulating material 33 is arranged in the annular groove 315 wrapped by the coating material 313, the end surface of the bonded heat insulating material 33 is insulated from the vacuum heat The end faces of the boards 31 are on the same plane, which makes the heat insulation board 3 form a rectangular cross section.
  • the heat insulation board 3 has a rectangular cross-section, and the path of external heat transfer through the surface of the coating material 313 becomes longer, further reducing the heat transfer to the interior of the refrigerator, so that the heat insulation board 3 has a better heat insulation effect.
  • the refrigerator shell 11 and the liner 13 are filled with foamed polyurethane 5
  • the surface of the heat insulation board 3 is smooth and flat, there will be no narrow space that cannot be filled by the foamed polyurethane, avoiding the occurrence of cavities and affecting the quality of the appearance surface, etc. question.
  • one embodiment of the present invention provides a method for preparing a heat insulation board, the method comprising the following steps:
  • the core material of the heat insulation board can be processed by one-piece molding, or it can be made into a unit size and then laminated. It can be understood that any production method for preparing a core material of a conventional shape can be used.
  • the core material may be at least one of glass fiber, glass wool and fumed silica.
  • the processing method of the annular groove can choose any conventional processing method, such as milling.
  • the thickness of the annular groove may be 1/2-2/3 of the thickness of the core material, and the position of the annular groove may be close to the edge of the end face of the core material.
  • the coating material can be a gas barrier material such as aluminum foil or evaporated aluminum.
  • the film-coated material bag After decompressing and vacuumizing the core material and the film-coated material bag, the film-coated material bag is heat-pressed and sealed to obtain a vacuum insulation panel with an annular groove.
  • the thermal resistance of the thermal insulation material is higher than the thermal resistance of the coating material.
  • a mold is prepared according to the size of the annular groove, and a heat insulating material is prepared in the mold.
  • the heat insulating material may be at least one of foamed styrene, foamed polyurethane, foamed polyethylene, foamed polypropylene, or other materials with higher thermal resistance than the coating material.
  • the surface of the cut heat insulation material is relatively flat and smooth, and the heat insulation material can be fixed in the annular groove of the vacuum heat insulation panel by means of double-sided tape, roller glue, or the like.
  • the preparation method of the heat-insulating board provided by the invention has a simple process and is convenient for production and processing; meanwhile, the prepared heat-insulating board can have a good thermal insulation effect.
  • a groove for accommodating the getter is processed inside the core material, and the getter is put in.
  • the getter can absorb the escaped gas in the core material, further ensuring The degree of vacuum inside the insulation board. Further, the getter can be calcium oxide getter.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermal Insulation (AREA)
  • Refrigerator Housings (AREA)

Abstract

一种隔热板材（3），包含真空绝热板（31）和隔热材料（33）；真空绝热板包含芯材（311）及覆膜材料（313），芯材一面上开有一环形槽（315），覆膜材料包裹芯材，芯材与覆膜材料之间形成真空；隔热材料设置于覆膜材料包裹后的环形槽内，隔热材料与真空绝热板位于同一平面，隔热材料热阻高于覆膜材料热阻。还包括一种隔热板材的制备方法和应用该隔热板材的冰箱。经隔热材料传递到真空绝热板边缘及内部的热量减少，降低了真空绝热板边缘的"热桥效应"，起到了良好的保温隔热效果。

Description

隔热板材及其制备方法以及应用该隔热板材的冰箱 技术领域
本发明涉及制冷电器领域，尤其涉及一种隔热板材及其制备方法以及应用该隔热板材的冰箱。
背景技术
真空绝热板，是真空保温材料中的一种，是由填充芯材与真空保护表层复合而成，它有效地避免空气对流引起的热传递。目前，真空绝热板在冰箱上的应用是将平板的真空绝热板直接贴敷到表面较平整的冰箱外壳上，然后再进行发泡填充，但为了维持内部的真空度，真空绝热板常采用铝箔或者蒸镀铝的材质作为覆膜材料使用，由于铝的传热系数较大，热量通过覆膜材料直接从一侧传递到另一侧上，就导致真空绝热板的边缘出现“热桥效应”，真空绝热板的边缘节能较差。
现有的技术方案为当真空绝热板贴敷于冰箱外壳时，他们之间增加一层厚度较小的保温材料进行过度，由于保温材料的尺寸小于真空绝热板的尺寸，导致真空绝热板边缘处于悬空状态，在聚氨酯发泡时，会由于发泡料的无序性以及悬空空间的厚度较小，导致聚氨酯填充不到，继而出现空洞、影响外观面等质量缺陷。
发明内容
本发明的目的在于提供一种隔热板材及其制备方法以及应用该隔热板材的冰箱，用于解决上述问题。
为实现上述发明目的之一，本发明的一实施方式提供一种隔热板材，包含真空绝热板和隔热材料；所述真空绝热板包含芯材及覆膜材料，所述芯材一面上开有一环形槽，所述覆膜材料包裹所述芯材，所述芯材与所述覆膜材料之间形成真空；所述隔热材料设置于所述覆膜材料包裹后的环形槽内，所述隔热材料与所述真空绝热板位于同一平面，所述隔热材料热阻高于所述覆膜材料热阻。
作为本发明一实施方式的进一步改进，所述隔热板材还包括：所述覆膜材料为铝箔或蒸镀铝。
作为本发明一实施方式的进一步改进，所述隔热板材还包括：所述芯材为玻璃纤维、玻璃棉以及气相二氧化硅中的至少一种。
作为本发明一实施方式的进一步改进，所述隔热板材还包括：所述隔热材料为 发泡苯乙烯、发泡聚氨酯、发泡聚乙烯、发泡聚丙烯中的至少一种。
作为本发明一实施方式的进一步改进，所述隔热板材还包括：所述环形槽的厚度为所述芯材厚度的1/2-2/3。
作为本发明一实施方式的进一步改进，所述隔热板材还包括：所述环形槽的一侧端面与所述芯材侧端面齐平，使粘结后的所述隔热材料端面与所述真空绝热板端面在同一平面。
作为本发明一实施方式的进一步改进，所述隔热板材还包括：所述芯材内部放置有吸气剂。
为实现上述发明目的之一，本发明的一实施方式提供一种冰箱，包含外壳和内胆，如上述技术方案所述的隔热板材和发泡聚氨酯设置于冰箱外壳和内胆之间，且所述隔热材料所在面贴附于冰箱外壳上。
为实现上述发明目的之一，本发明的一实施方式提供一种隔热板材的制备方法，该方法包括如下步骤：将制备好的芯材一面加工出环形槽；将带有环形槽的芯材装入预制好的覆膜材料袋中；对芯材和覆膜材料袋进行减压抽真空和热封处理，得到带有环形槽的真空绝热板；根据环形槽的尺寸模制隔热材料，所述隔热材料热阻高于所述覆膜材料热阻；将裁切好的隔热材料粘结在真空绝热板环形槽内，其中，隔热材料与所述真空绝热板位于同一平面，。
作为本发明一实施方式的进一步改进，所述隔热板材的制备方法还包括：所述芯材为一体成型或制成单元尺寸后层叠加工。
与现有技术相比，本发明公开的隔热板材及其制备方法以及应用该隔热板材的冰箱，经隔热材料传递到真空绝热板边缘及内部的热量减少，降低了真空隔热板边缘的“热桥效应”，起到了良好的保温隔热效果。
附图说明
图1是本发明一实施方式的冰箱纵向剖面示意图
图2是本发明一实施方式的隔热板材的剖面示意图；
图3是本发明一实施方式的真空绝热板的剖面示意图；
图4是本发明一实施方式的隔热板材的制备方法流程图。
具体实施方式
以下将结合附图所示的具体实施方式对本发明进行详细描述。但这些实施方式 并不限制本发明，本领域的普通技术人员根据这些实施方式所做出的结构、方法、或功能上的变换均包含在本发明的保护范围内。
应该理解，本文使用的例如“上”、“下、”“外”、“内”等表示空间相对位置的术语是出于便于说明的目的来描述如附图中所示的一个单元或特征相对于另一个单元或特征的关系。空间相对位置的术语可以旨在包括设备在使用或工作中除了图中所示方位以外的不同方位。
如图1所示，本发明的一实施方式提供一种冰箱1，包含外壳11和内胆13，在冰箱外壳11和内胆13之间设置有隔热板材3和发泡聚氨酯5，且所述隔热材料3所在面贴附于冰箱外壳11上。
如图2所示，本发明的一实施方式提供的一种隔热板材3，包含真空绝热板31和隔热材料33。
如图3所示，所述真空绝热板31包含芯材311及覆膜材料313，所述芯材311一面上开有一环形槽315，所述覆膜材料313包裹所述芯材311，所述芯材311与所述覆膜材料313之间形成真空。
在本实施方式中，芯材311可为玻璃纤维、玻璃棉以及气相二氧化硅中的至少一种；覆膜材料313可为铝箔或蒸镀铝等能够阻隔外部气体的材质；所述隔热材料33可为发泡苯乙烯、发泡聚氨酯、发泡聚乙烯、发泡聚丙烯中的至少一种。
进一步地，芯材311内部可以放置有吸气剂317，用于吸附芯材311内逸出气体，进一步保持真空绝热板31内真空度。
在本实施方式中，芯材311一面上开有一环形槽315，由于覆膜材料313选为铝箔或蒸镀铝等柔性材质，可以理解为，覆膜材料313包裹芯材311抽真空后形成的真空绝热板31同样有环形槽315结构。
在本实施方式中，当冰箱1外部热量经外壳11传递到隔热板材3时，由于所述隔热材料33设置在覆膜材料313包裹后的环形槽315内，所述隔热材料33与所述真空绝热板31位于同一平面，所述隔热材料33热阻高于所述覆膜材料313热阻，冰箱外部热量经隔热材料33边缘处传递到真空绝热板31边缘及内部的热量减少，降低了真空隔热板边缘的“热桥效应”，也减少了传递到冰箱内部的热量。
另外，在本实施方式中，隔热材料33上表面与所述真空绝热板31位于同一平面，使隔热板材3有一平整表面，便于贴附于冰箱外壳等应用场景中。
在本实施方式中，环形槽315的厚度可为所述芯材311厚度的1/2-2/3，环形槽315可以设置在靠近芯材311边缘的位置，进一步地，可以将环形槽315设置 于一侧端面与芯材311侧端面齐平的位置，由于隔热材料33设置在覆膜材料313包裹后的环形槽315内，使得粘结后的隔热材料33端面与所述真空绝热板31端面在同一平面，也就使隔热板材3形成矩形截面。隔热板材3为矩形截面，外部热量经覆膜材料313表面传递的路径变长，进一步减少热量传递到冰箱内部，使隔热板材3隔热保温效果更好。另外，当冰箱外壳11和内胆13中填充发泡聚氨酯5时，由于隔热板材3表面光滑平整，不会出现发泡聚氨酯填充不到的狭小空间，避免了出现空洞、影响外观面等质量问题。
如图4所示，本发明的一实施方式提供一种隔热板材的制备方法，该方法包括如下步骤：
S1.制备芯材。
隔热板材的芯材可以采用一体成型加工芯材，也可以制成单元尺寸后层叠加工，可以理解任何制备常规形状芯材的生产方式都可采用。其中，芯材可以是玻璃纤维、玻璃棉以及气相二氧化硅中的至少一种。
S2.将制备好的芯材一面加工出环形槽。
环形槽的加工方式可以选择任意常规的加工方法，如铣削加工。具体的，环形槽的厚度可选为芯材厚度的1/2-2/3，环形槽的位置可选为靠近芯材端面边缘处。
S3.制备覆膜材料袋。
将覆膜材料多层复合后裁切，制成覆膜材料袋。具体的，覆膜材料可为铝箔或蒸镀铝等阻隔气体的材质。
S4.将带有环形槽的芯材装入预制好的覆膜材料袋中。
S5.对芯材和覆膜材料袋进行减压抽真空和热封处理，得到带有环形槽的真空绝热板。
对芯材和覆膜材料袋进行减压抽真空处理后，将覆膜材料袋热压封口，得到带有环形槽的真空绝热板。
S6.根据环形槽的尺寸模制隔热材料，所述隔热材料热阻高于所述覆膜材料热阻。
根据环形槽尺寸制备模具，在模具内制备隔热材料。其中，隔热材料可以是发泡苯乙烯、发泡聚氨酯、发泡聚乙烯、发泡聚丙烯中的至少一种，或其他热阻大于覆膜材料的材质。
S7.将裁切好的隔热材料粘结在真空绝热板环形槽内，其中，隔热材料与所述真空绝热板位于同一平面。
在本实施方式中，裁切好的隔热材料表面比较平整光滑，可以采用双面胶、辊胶等方式将隔热材料固定在真空绝热板的环形槽内。
本发明提供的隔热板材制备方法工艺简单，便于生产加工；同时制得的隔热板材能够起到良好的保温隔热效果。
在本实施方式中，加工芯材表面环形槽时，同时在芯材内部加工出容纳吸气剂的槽，并放入吸气剂，吸气剂能吸收芯材内逸出的气体，进一步保证隔热板材内部的真空度。进一步地，吸气剂可选为氧化钙吸气剂。
应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚起见，本领域技术人员应当将说明书作为一个整体，各实施方式中的技术方案也可以经适当组合，形成本领域技术人员可以理解的其他实施方式。
上文所列出的一系列的详细说明仅仅是针对本发明的可行性实施方式的具体说明，它们并非用以限制本发明的保护范围，凡未脱离本发明技艺精神所作的等效实施方式或变更均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种隔热板材，包含真空绝热板和隔热材料；
    所述真空绝热板包含芯材及覆膜材料，其特征在于，所述芯材一面上开有一环形槽，所述覆膜材料包裹所述芯材，所述芯材与所述覆膜材料之间形成真空；
    所述隔热材料设置于所述覆膜材料包裹后的环形槽内，所述隔热材料与所述真空绝热板位于同一平面，所述隔热材料热阻高于所述覆膜材料热阻。
  2. 根据权利要求1所述的隔热板材，其特征在于，所述覆膜材料为铝箔或蒸镀铝。
  3. 根据权利要求1所述的隔热板材，其特征在于，所述芯材为玻璃纤维、玻璃棉以及气相二氧化硅中的至少一种。
  4. 根据权利要求1所述的隔热板材，其特征在于，所述隔热材料为发泡苯乙烯、发泡聚氨酯、发泡聚乙烯、发泡聚丙烯中的至少一种。
  5. 根据权利要求1所述的隔热板材，其特征在于，所述环形槽的厚度为所述芯材厚度的1/2-2/3。
  6. 根据权利要求1所述的隔热板材，其特征在于，所述环形槽的一侧端面与所述芯材侧端面齐平，使粘结后的所述隔热材料端面与所述真空绝热板端面在同一平面。
  7. 根据权利要求1所述的隔热板材，其特征在于，所述芯材内部放置有吸气剂。
  8. 一种冰箱，包含外壳和内胆，其特征在于，如权利要求1所述的隔热板材和发泡聚氨酯设置于冰箱外壳和内胆之间，且所述隔热材料所在面贴附于冰箱外壳上。
  9. 一种隔热板材的制备方法，其特征在于，该方法包括如下步骤：
    将制备好的芯材一面加工出环形槽；
    将带有环形槽的芯材装入预制好的覆膜材料袋中；
    对芯材和覆膜材料袋进行减压抽真空和热封处理，得到带有环形槽的真空绝热板；
    根据环形槽的尺寸模制隔热材料，所述隔热材料热阻高于所述覆膜材料热阻；
    将裁切好的隔热材料粘结在真空绝热板环形槽内，其中，隔热材料与所述真空绝热板位于同一平面。
  10. 根据权利要求9所述的隔热板材的制备方法，其特征在于，所述芯材为一体 成型或制成单元尺寸后层叠加工。
PCT/CN2022/100768 2021-06-28 2022-06-23 隔热板材及其制备方法以及应用该隔热板材的冰箱 WO2023274022A1 (zh)

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