Vacuum insulated panel and refrigeration equipment

Abstract

The utility model belongs to the technical field of vacuum heat insulation materials, and particularly relates to a vacuum heat insulation plate and refrigeration equipment. The vacuum heat insulation plate comprises a membrane material and a heat insulation core material, the membrane material comprises a coating membrane and a separation membrane, the coating membrane is arranged in a bag shape with a cavity inside, and the separation membrane is arranged in the coating membrane and divides the cavity into at least two cavities with vacuum degree difference; the number of the heat insulation core materials is at least two, and the heat insulation core materials are packaged in the at least two cavities in a one-to-one correspondence mode. Wherein two adjacent chambers can be communicated through heating. According to the vacuum insulated panel, the chambers with different vacuum degrees in the coating film can be communicated through heating, and due to the fact that the communicated chambers have vacuum degree differences, gas can flow in the communicated chambers and is uniformly redistributed after communication, so that the vacuum degrees of the communicated chambers can be readjusted, namely the heat conductivity coefficient of the vacuum insulated panel can be adjusted, and the heat conductivity coefficient of the vacuum insulated panel can be adjusted. Therefore, the vacuum degree requirements of different application scenes can be met, and the applicability is wide.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum thermal insulation materials, and particularly relates to a vacuum thermal insulation panel and refrigeration equipment. Background Art

[0002] Vacuum insulation panels are based on the principle of vacuum insulation. By maximizing the vacuum degree inside the panel and filling it with core insulation material, convection and radiation heat transfer are reduced. They are now widely used in refrigerators, water heaters, cold storage, house construction, etc. to reduce the heat exchange between the storage space of the refrigeration equipment and the outside of the refrigeration equipment.

[0003] However, vacuum insulation panels in related technologies generally have a preset thermal conductivity after fabrication. However, different application scenarios require different thermal conductivity, which limits the application of vacuum insulation panels with a preset thermal conductivity.

[0004] Therefore, in view of the above shortcomings, the present invention is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a vacuum insulation panel and a refrigeration device, so as to solve the problem in the prior art that the thermal conductivity of the vacuum insulation panel is fixed and the application is limited.

[0006] The first aspect of the present invention provides a vacuum insulation panel, comprising:

[0007] A membrane material, comprising a covering membrane and a separating membrane, wherein the covering membrane is arranged in a bag-like shape with a cavity therein, and the separating membrane is arranged within the covering membrane and separates the cavity into at least two chambers with different vacuum degrees;

[0008] Insulating core materials, there are at least two insulating core materials, which are encapsulated in at least two of the chambers in a one-to-one correspondence;

[0009] Two adjacent chambers can be connected by heating.

[0010] According to the vacuum insulation panel of the present invention, the film material's covering film is formed into a bag-like structure with a cavity. A separator film is disposed within the bag-like structure of the covering film and divides the bag-like inner cavity of the covering film into at least two chambers with different vacuum levels. Adjacent chambers can be connected by heating. Therefore, the vacuum insulation panel can connect chambers with different vacuum levels within the covering film by heating. Because the connected chambers have different vacuum levels, the gas flows and redistributes evenly within the connected chambers after connection, allowing the vacuum levels of the connected chambers to be readjusted. This allows the thermal conductivity of the vacuum insulation panel to be adjusted, thereby meeting the vacuum requirements of different application scenarios, thus embracing a wide range of applications.

[0011] The vacuum insulation panel provided by the utility model may also have the following additional technical features:

[0012] In a specific embodiment of the present invention, the melting point of the separation membrane is lower than the melting point of the covering membrane, and the separation membrane is heated and melted to connect the two adjacent chambers.

[0013] In a specific embodiment of the present invention, the separation membrane is connected to the covering membrane via an adhesive layer to separate the cavity.

[0014] In a specific embodiment of the present invention, the melting point of the adhesive layer is lower than the melting points of the covering film and the separating film, and the adhesive layer is heated and melted to connect the two adjacent chambers.

[0015] In a specific embodiment of the present invention, the cavity includes three chambers arranged side by side, and the vacuum degrees of the three chambers are arranged in sequence from low to high.

[0016] In a specific embodiment of the present invention, the separator is a polyethylene film.

[0017] In a specific embodiment of the present invention, at least one of the chambers is further provided with an air suction device, and the air suction device is configured to rupture under a pressed state to allow the gas in the chamber to enter and be absorbed.

[0018] In a specific embodiment of the present invention, a receiving groove having a depth no less than that of the air suction device is opened on the thermal insulation core material, and the air suction device is arranged in the receiving groove.

[0019] In a specific embodiment of the present invention, the air suction device includes a shell with an inner cavity and an air suction material arranged in the inner cavity. The shell is also connected to a protrusion, and the protrusion is provided with a sharp thorn on the side facing the shell that can pierce the shell when pressed.

[0020] The second aspect of the present invention further provides a refrigeration device, which includes the vacuum insulation panel described in any one of the above. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic cross-sectional view of a vacuum insulation panel in one embodiment of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of a chamber.

[0024] Description of reference numerals:

[0025] 100-vacuum insulation panel;

[0026] 10-membrane material, 11-covering film, 12-separating film, 13-edge sealing;

[0027] 20-insulation core material;

[0028] 30-Suction device. DETAILED DESCRIPTION

[0029] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0030] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0031] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0032] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "below" another element or feature would then be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein are interpreted accordingly.

[0033] Vacuum insulation panels, a new type of insulation material, utilize a high internal vacuum to reduce convection and minimize internal heat transfer, achieving thermal insulation or even heat isolation. These panels are widely used in refrigerators, freezers, and other refrigeration equipment. However, vacuum insulation panels in related technologies generally have a fixed thermal conductivity coefficient. However, different application scenarios require different thermal conductivity requirements, and vacuum insulation panels with a fixed thermal conductivity coefficient are limited in their application because they cannot meet the requirements of different scenarios.

[0034] In response to the above technical problems, the present invention provides a vacuum insulation panel 100, which has a variable vacuum degree through an improved structure, thereby being able to meet the thermal conductivity requirements of different application scenarios.

[0035] Reference Figure 1-Figure 2 The vacuum insulation panel 100 provided by the embodiment of the present invention includes a film material 10 and an insulating core material 20, wherein the film material 10 includes a covering film 11 and a separating film 12, the covering film 11 is arranged in a bag shape with a cavity therein, and the separating film 12 is arranged in the covering film 11 and divides the cavity into at least two chambers with different vacuum degrees; there are at least two insulating core materials 20, and they are encapsulated in at least two chambers in a one-to-one correspondence; wherein two adjacent chambers can be connected by heating.

[0036] According to the vacuum insulation panel 100 of the present invention, the covering film 11 of the membrane material 10 is formed into a bag-like structure having a cavity. The separator film 12 is disposed within the bag-like structure of the covering film 11 and divides the bag-like inner cavity of the covering film 11 into at least two chambers having different vacuum levels, and the two adjacent chambers can be connected by heating. Therefore, the vacuum insulation panel 100 can connect the chambers with different vacuum levels within the covering film 11 by heating. Since the connected chambers have different vacuum levels, the gas will flow and be evenly redistributed within the connected chambers after such connection, so that the vacuum level of the connected chambers can be readjusted, that is, the thermal conductivity of the vacuum insulation panel 100 can be adjusted, thereby meeting the vacuum level requirements of different application scenarios, that is, it has a wide range of applications.

[0037] The insulating core material 20 can be a rectangular plate-like structure, and there are at least two of them, with the two insulating core materials 20 having the same length and arranged in sequence parallel to each other in the longitudinal direction. The covering film 11 forms a bottom, a top, and circumferential sides along the contour of the insulating core material 20. The bottom, top, and axial sides together form a bag-like structure capable of accommodating the insulating core material 20. The separator film 12 is disposed within the bag-like structure, and specifically between two adjacent insulating core materials 20. The separator film 12 is connected to the outer covering film to separate the bag-like inner cavity into relatively sealed chambers with different vacuum levels.

[0038] The coating film 11 mainly includes a heat-resistant layer, a gas-resistant layer, and a heat-sealing layer. The heat-sealing layer is made of a material selected from the group consisting of modified polyamide, polyamide ether imide, polyimide, polyphenylene sulfide, polyether ether ketone, polyamide-imide, polyphenylene sulfone, polyether sulfone, and polysulfone, or a combination thereof. The gas-resistant layer is made of a material selected from the group consisting of aluminum foil, copper foil, and silver foil. The heat-resistant layer is made of a material selected from the group consisting of polyimide, polyether ether ketone, polyphenylene sulfide, polytetrafluoroethylene, liquid crystal polymer, polyamide, polyamide ether imide, polyamide-imide, polyphenylene sulfone, polyether sulfone, and polysulfone, or a combination thereof.

[0039] Specifically, the covering film 11 is formed by gluing the edges of two pieces of covering film 11 raw materials together, wherein a receiving cavity that can accommodate the insulating core material 20 is formed between the two pieces of covering film 11 raw materials, and a sealing edge 13 is formed on the circumferential side of the receiving cavity. The sealing edge 13 is formed by gluing the two pieces of covering film 11 raw materials together to ensure the sealing of the receiving cavity formed in the covering film 11.

[0040] It should be noted that the bottom and the top of the covering film 11 are arranged opposite to each other, and the bottom and the top are the two faces with the largest areas in the rectangular parallelepiped formed by the covering film 11 body.

[0041] In one embodiment of the present invention, the melting point of separator 12 is lower than that of coating 11. Separator 12 is heated and melted to connect two adjacent chambers. Because the melting point of separator 12 is lower than that of coating 11, separator 12 reaches its melting point and melts before coating 11 as the temperature rises. This connects the chambers separated by separator 12, redistributing the gas, thereby adjusting the vacuum level and thermal conductivity.

[0042] In a specific embodiment of the present invention, the separation membrane 12 is connected to the covering membrane 11 through an adhesive layer to separate the cavities.

[0043] In one embodiment of the present invention, the adhesive layer has a melting point lower than that of the coating film 11 and the separator film 12. The adhesive layer melts upon heating to connect two adjacent chambers. Because the adhesive layer's melting point is lower than that of the coating film 11 and the separator film 12, as the temperature rises during heating, the adhesive layer reaches its melting point and melts before the separator film 12 and the coating film 11. This connects the chambers separated by the separator film 12, redistributing the gas, thereby adjusting the vacuum level and thus the thermal conductivity.

[0044] In a specific embodiment of the present invention, the cavity includes three chambers arranged side by side, and the vacuum degrees of the three chambers are arranged in order from low to high.

[0045] Reference Figure 1 As shown, the insulation core material 20 in the low-vacuum chamber is wider than the insulation core material in the other two chambers. As a result, the low-vacuum region forms the main insulation zone of the vacuum insulation panel 100, the primary structure for reducing convective and radiative heat transfer within the panel 100. The regions corresponding to the medium- and high-vacuum chambers serve as adjustment zones for the vacuum insulation panel 100, primarily used to adjust the thermal conductivity of the low-vacuum region. Therefore, the maximum value of the thermal conductivity range of the vacuum insulation panel 100 is the thermal conductivity of the low-vacuum region, while the minimum value is the thermal conductivity after adjustment by the high- and medium-vacuum chambers.

[0046] Of course, in other embodiments, the area corresponding to the medium vacuum degree or high vacuum degree can also be used as the main insulation area of the vacuum insulation panel 100, and the other areas are adjustment areas. The specific selection can be made according to needs.

[0047] Similarly, in other embodiments, the cavity may be divided into two, four, five or other number of chambers, and the multiple chambers may be arranged at once in an increasing or decreasing manner of vacuum degree.

[0048] In a specific embodiment of the present invention, the separator 12 is a polyethylene film.

[0049] Specifically, the covering film 11 in this embodiment can be an aluminum-plastic film, and the melting point of the aluminum-plastic film is greater than that of the polyethylene film, thereby satisfying the requirement that the melting point of the separation film 12 is lower than the melting point of the covering film 11. Furthermore, it can melt when heated and disconnect from the aluminum-plastic film, so that different chambers are connected, thereby realizing the adjustment of the thermal conductivity coefficient of the vacuum insulation panel 100.

[0050] It should be noted that when adjusting the thermal conductivity of the vacuum insulation panel 100, the middle area of the partition membranes 12 of two adjacent chambers is heated by point heating, that is, only the partition membrane 12 in the middle area is damaged or only the glue layer in the middle area of the partition membrane 12 is damaged, so as to avoid damaging the edge sealing 13 of the vacuum insulation panel 100.

[0051] In one embodiment of the present invention, to further increase the adjustable range of the thermal conductivity of the vacuum insulation panel 100, an air suction device 30 is provided. Specifically, at least one chamber is provided with the air suction device 30, which is configured to rupture when pressed, allowing gas within the chamber to enter and be absorbed. Thus, when the thermal conductivity required for an application scenario is lower than that of the main insulation area of the vacuum insulation panel 100, the air suction device 30 can be pressed and activated to absorb moisture and air within the vacuum insulation panel 100, thereby reducing the air pressure and, consequently, the thermal conductivity of the vacuum insulation panel 100.

[0052] Optionally, one or more suction devices 30 are provided in the cavity of the main insulation zone of the vacuum insulation panel 100, or one or more suction devices 30 are provided in the cavities of the main insulation zone and the adjustment zone of the vacuum insulation panel 100. In this way, the suction capacity can be further increased by increasing the number of suction devices 30, that is, the adjustment range of the thermal conductivity coefficient of the suction device 30 is increased.

[0053] When adjusting the thermal conductivity, it is preferred to use the adjustment area to adjust the thermal conductivity of the vacuum insulation panel 100, that is, the thermal conductivity of the vacuum insulation panel 100 is adjusted by heating first, and then the suction device 30 is used to adjust the thermal conductivity of the vacuum insulation panel 100.

[0054] In one embodiment of the present invention, to prevent accidental activation of the air intake device 30 during transportation or installation, a receiving groove, no less than the depth of the air intake device 30, is provided in the insulating core material 20. Specifically, the receiving groove is provided at a corner of the insulating core material 20 and is no less than the thickness of the air intake device 30. This allows the air intake device 30 to be completely accommodated within the groove, thereby reducing the possibility of accidental activation.

[0055] In one embodiment of the present invention, the air suction device 30 includes a shell with an inner cavity and an air suction material arranged in the inner cavity. A protrusion is also connected to the shell, and a sharp thorn that can pierce the shell when pressed is provided on the side of the protrusion facing the shell.

[0056] The outer shell is a shell-and-tube structure with an inner cavity. The getter material, primarily composed of one or more of silica powder, alumina powder, and graphite powder, is disposed within the inner cavity of the outer shell. The protrusions, which can be in the form of thumbtacks or similar structures, are attached to the shell and can be moved toward and punctured by external pressure. This allows the getter material to contact air and moisture within the vacuum insulation panel 100, absorbing the moisture and air within. This further increases the vacuum level within the panel 100, thereby enhancing the panel's thermal insulation performance.

[0057] Of course, in other embodiments, the housing may also adopt other structures that can be destroyed by pressing, which is not limited here.

[0058] The method for preparing the vacuum insulation panel 100 specifically includes the following steps:

[0059] S1: Prepare the insulation core material 20 , the cover film 11 and the separator film 12 according to the specifications of the vacuum insulation panel 100 .

[0060] The number of insulation core materials 20 is equal to the number of partitions in the vacuum insulation panel 100, and their width is also equal to the width of the corresponding partition. There are two sheets of raw material for the covering film 11, and the number of separator films 12 is one less than the number of partitions. The separator film 12 is strip-shaped, and its length is greater than the insulation core material 20 but less than the single sheet of raw material for the covering film 11. The width of the separator film 12 is greater than the thickness of the insulation core material 20.

[0061] S2: preparing a bag-shaped film material 10 having a plurality of openings.

[0062] Multiple separators 12 are folded symmetrically along their widths and spaced between adjacent wrapping film 11 materials. The separators 12 are positioned so that they are located at the boundaries of adjacent partitions. The longitudinal edges of the two side surfaces of the separators 12 are bonded to the inner wall of the wrapping film 11 on the corresponding side. During bonding, ensure that the non-bonded width of each separator 12 is no less than the thickness of the insulating core material 20. The three adjacent edges of the two wrapping film 11 materials are then connected to form a sealed edge 13, thereby forming a bag-like structure. One end of the separator 12 is located and fixed in the sealed edge 13, while the other end is located at the opening of the bag-like structure. This results in a bag-like film material 10 having multiple openings.

[0063] S3: Vacuum heat sealing treatment.

[0064] The insulating core material 20 and the air suction device 30 are placed one by one into the corresponding chambers through the multiple openings of the bag-shaped film material 10, and the above structure is processed using a vacuum heat sealing process. The vacuuming time of the chambers with different vacuum levels is different. First, the low vacuum chamber that has been evacuated for a preset time is heat-sealed. The vacuuming is continued and the medium and low vacuum chambers that have also been evacuated for a preset time are heat-sealed. The vacuuming is continued until all chambers are heat-sealed, thereby obtaining the vacuum insulation panel 100 of this embodiment.

[0065] The second aspect of the present invention provides a refrigeration device, which includes a vacuum insulation panel 100 according to any one of the above embodiments. The structure of the vacuum insulation panel 100 refers to the above embodiments.

[0066] Since the refrigeration device of the present invention includes the vacuum insulation panels 100 in all the above embodiments, the refrigeration device of the present invention and the vacuum insulation panels 100 have the same technical effects, which will not be described in detail here.

[0067] The refrigeration device of the present invention is a refrigerator or a freezer, etc. Other structures of the refrigeration device are the same as those in the prior art and will not be described in detail here.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vacuum insulation panel, characterized in that: include: A membrane material, comprising a covering membrane and a separating membrane, wherein the covering membrane is arranged in a bag-like shape with a cavity therein, and the separating membrane is arranged within the covering membrane and separates the cavity into at least two chambers with different vacuum degrees; Insulating core materials, there are at least two insulating core materials, which are encapsulated in at least two of the chambers in a one-to-one correspondence; Two adjacent chambers can be connected by heating.

2. The vacuum insulation panel according to claim 1, wherein The melting point of the separation film is lower than that of the covering film, and the separation film is heated and melted to connect two adjacent chambers.

3. The vacuum insulation panel according to claim 1, wherein The separation film is connected to the covering film through an adhesive layer to separate the cavity.

4. The vacuum insulation panel according to claim 3, wherein: The melting point of the adhesive layer is lower than the melting points of the covering film and the separation film, and the adhesive layer is heated and melted to connect two adjacent chambers.

5. The vacuum insulation panel according to claim 1, wherein The cavity includes three chambers arranged side by side, and the vacuum degrees of the three chambers are arranged in order from low to high.

6. The vacuum insulation panel according to claim 1, wherein: The separator is a polyethylene film.

7. The vacuum insulation panel according to claim 1, wherein At least one of the chambers is further provided with a gas suction device, which is configured to rupture under a pressed state to allow the gas in the chamber to enter and be absorbed.

8. The vacuum insulation panel according to claim 7, wherein: The heat-insulating core material is provided with a receiving groove having a depth no less than that of the air suction device, and the air suction device is arranged in the receiving groove.

9. The vacuum insulation panel according to claim 7, wherein: The air suction device includes a shell with an inner cavity and an air suction material arranged in the inner cavity. The shell is also connected to a protrusion, and a side of the protrusion facing the shell is provided with a sharp thorn that can pierce the shell in a pressed state.

10. A refrigeration device, characterized in that: The refrigeration equipment comprises the vacuum insulation panel according to any one of claims 1 to 9.

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