Refrigerator door glass stripping method and refrigerator door glass stripping device

Abstract

The invention discloses a refrigerator door glass stripping method and a refrigerator door glass stripping device. The refrigerator door glass stripping method comprises the following steps: melting a hot melt adhesive: transferring heat to door glass or / and a door base body by adopting a heating source; controlling a heating source to continuously heat until the hot melt adhesive is molten; fixing the refrigerator door: locking and fixing the door base body, and supporting and fixing the four corners of the door glass; separating the door base body from the door glass: rotating the door base body, and applying a horizontal shearing force to the hot melt adhesive and the polyurethane foaming material between the door base body and the door glass; the door glass is adsorbed, and the door glass and the door base body are separated. According to the door glass stripping method, heat energy utilization, shearing force application and door glass adsorption separation are combined, the door glass stripping method can be used for glass doors of various structures, complete separation between the door glass and the door body can be achieved, the separation difficulty is low, and the separation effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and more particularly to a method for peeling refrigerator door glass and a peeling device for peeling refrigerator door glass. Background Art

[0002] The sorting and recycling processes for separating materials such as metals, plastics, and insulating materials from discarded refrigerators have been established. However, for glass, it is usually firmly bonded to the main substrate and polyurethane foam, so it is difficult to peel off without breaking during the waste treatment (recycling process), resulting in a low recovery rate. Currently, in refrigerator recycling factories, the entire door body is usually sent into a crusher, causing the glass to become fragments. The broken glass is difficult to separate from metals or plastics during the subsequent air classification process, so most of it is ultimately discarded.

[0003] To achieve the complete separation of the door glass, a method of laser ablation of the organic layer has emerged. This method cleverly utilizes the properties of glass that transmit through a specific light range. The disadvantage is that it takes a long time to completely ablate the entire piece of glass, and there may be a risk of ineffective light concentration when dealing with the white organic layer. For glass with a white printed layer, this method may not be able to fully ablate it, resulting in difficulty in separation, and its versatility needs to be improved.

[0004] There is also a cutting method using a direct cutting and separation method. First, the blade needs to enter between the glass and the main body, and it is necessary to skillfully cut the adhesive layer without bending the glass. It needs to be adjusted according to the structure of the object, which is a technique that requires skilled operation.

[0005] This method requires complex operations according to the structure of the object to avoid breakage, and the difficulty is relatively high.

[0006] The above information disclosed in this background art is only used to increase the understanding of the background art of the present application. Therefore, it may include prior art that is not known to those of ordinary skill in the art. Summary of the Invention

[0007] In view of the above technical problems in the separation of the door glass pointed out in the background art, a new method for peeling the door glass is proposed. It combines the utilization of heat energy, the application of shear force, and glass adsorption separation, can be used for glass doors of various structures, and can achieve the complete separation between the door glass and the door body, with low separation difficulty and good separation effect.

[0008] To achieve the above-mentioned invention purpose, the present invention is implemented by the following technical solutions: In some embodiments of the present application, a method for peeling refrigerator door glass is provided. The refrigerator door includes: a door base; And a door glass assembled on the door base body, an intermediate area and an edge area located around the intermediate area are formed on the door glass; Polyurethane foam is provided between the intermediate area and the door base body; A hot melt adhesive for connecting the edge area and the door base body is provided between the edge area and the door base body; The method for peeling the refrigerator door glass includes the following steps: Melting the hot melt adhesive: Using a heating heat source to transfer heat to the door glass or / and the door base body; Controlling the heating heat source to continuously heat until the hot melt adhesive melts; Fixing the refrigerator door: Locking and fixing the door base body, and supporting and fixing the four corners of the door glass; Separating the door base body and the door glass: Rotating the door base body and applying a horizontal shearing force to the hot melt adhesive and the polyurethane foam located between the door base body and the door glass; Adsorbing the door glass and separating the door glass and the door base body.

[0009] In some embodiments of the present application, The heating heat source is an electric heating component, and its size is greater than or equal to the size of the door glass. The method for melting the hot melt adhesive is as follows: Attaching the electric heating component to the outer side surface of the door glass; Applying power to heat the door glass to a temperature above the first preset temperature to transfer heat to the hot melt adhesive connected to the door glass and melt it.

[0010] In some embodiments of the present application, The door base body includes: A door body member, horizontally arranged, which is a plastic part; A door body side member, connected to the periphery of the door body member, vertically arranged with respect to the door body member, and its material is metal. The hot melt adhesive is provided between the door body side member and the door glass; The heating heat source is an electromagnetic induction heating component, and the method for melting the hot melt adhesive is as follows: Attaching the electromagnetic induction heating component to the door glass; Connecting a high-frequency AC power supply so that current flows through the coil of the electromagnetic induction heating component to generate a magnetic field, causing eddy current heating in the door body side member.

[0011] In some embodiments of the present application, The door base body includes: A door body member, horizontally arranged; A door member frame, connected to the periphery of the door body member, arranged along the circumferential direction of the door body member, and a hot melt cavity is bonded to the opposite surface of the door member frame and the door glass; The heating heat source is a heating wire, which is buried between the hot melt adhesive and the door member frame, and is arranged circumferentially along the door member frame. The method of melting the hot melt adhesive is as follows: Apply voltage to both ends of the heating wire to make it heat up and melt the hot melt adhesive in contact with it.

[0012] In some embodiments of the present application, The door member frame includes: a first door frame, a second door frame, a third door frame, and a fourth door frame. The heating wire includes: A first heating wire segment, a second heating wire segment, a third heating wire segment, and a fourth heating wire segment are respectively arranged on the first door frame, the second door frame, the third door frame, and the fourth door frame; The heating wire segment arranged on at least one of the door frames is a bent heating curve segment; Alternatively, the heating wire segment arranged on at least one of the door frames is a heating straight segment.

[0013] In some embodiments of the present application, A first wiring terminal is arranged at the end of the heating wire, which is arranged at one of the corner positions of the door base and extends outwards from the door base; A second wiring terminal is located at the same corner position as the first wiring terminal and extends outwards from the door base; An insulating component is arranged between the first wiring terminal and the second wiring terminal for separating the first wiring terminal and the second wiring terminal.

[0014] In some embodiments of the present application, Before foaming the door glass and the door base, a release paper is laid on the printing surface in the middle area of the door glass.

[0015] In some embodiments of the present application, the refrigerator door glass peeling device includes: A machine body, on which a receiving space with an open top is formed; A rotating component is arranged in the receiving space and is rotatable; A locking and positioning assembly is arranged on the rotating component for positioning the door base placed on the rotating component; There are 4 groups of support and positioning assemblies, which are respectively arranged at the 4 corner positions of the door glass for supporting on the wall of the receiving space and clamping and positioning the corners of the door glass.

[0016] In some embodiments of the present application, the support and positioning assembly includes: A positioning and fixing member, including: A corner positioning part for clamping at the corner of the door glass; The supporting component has one end abutted against the corner positioning part and the other end abutted against the wall of the accommodating space.

[0017] In some embodiments of the present application, the locking and positioning assembly includes: A positioning member is arranged on the rotating component and is used for positioning the side edge of the refrigerator door; An elastic supporting component has one end supported on the side wall of the accommodating space and the other end abutted against the positioning member.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are: In the method for peeling the refrigerator door glass in the present invention, a heat source is used to heat and transfer heat to the hot melt adhesive to melt it, and the rotating door base is cooperated to rotate relative to the door glass to apply a horizontal shear stress, and the door glass is adsorbed by the adsorption component to achieve complete peeling of the door glass. It not only realizes a clean peeling of the whole door glass without any breakage, but also has a more thorough peeling effect and better peeling effect. It can perform completely reliable peeling on different types of door glasses and is not restricted by factors such as the printing layer of the door glass, with stronger universality; Moreover, the peeling method of the door glass in this embodiment does not require professional peeling operation techniques. When performing the peeling operation, only need to heat and transfer heat to the hot melt adhesive through the heating heat source, then apply a horizontal shear force to the rotating door base, and finally adsorb the door glass. The whole peeling method is simple in operation, with small difficulty, and can be realized even by non-professional peeling personnel. The peeling time of the whole door glass is short and the peeling efficiency is high.

[0019] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become clearer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic diagram of the overall structure of the refrigerator door according to the embodiment; Figure 2 It is an exploded view of the overall structure of the refrigerator door according to the embodiment; Figure 3 It is a schematic diagram of the structure of the refrigerator door with the door glass heated by an electric heating component according to the embodiment; Figure 4 It is a schematic diagram of the structure of the refrigerator door with the door glass heated by an electromagnetic induction heating component according to the embodiment Figure 1; Figure 5 Schematic diagram of the structure in which the door glass of the refrigerator door according to the embodiment is heated by an electromagnetic induction heating component Figure 2 ; Figure 6 Schematic diagram of the structure in which the door glass of the refrigerator door according to the embodiment is heated by a heating wire Figure 1 ; Figure 7 Schematic diagram of the structure of the hot melt adhesive and heating wire heating arrangement of the door glass of the refrigerator door according to the embodiment; Figure 8 Schematic diagram of the structure of the door glass peeling device of the refrigerator door according to the embodiment Figure 1 ; Figure 9 Schematic diagram of the structure of the door glass peeling device of the refrigerator door according to the embodiment Figure 2 ; Figure 10 Structural diagram of the cooperation between the positioning and fixing member and the supporting member of the door glass peeling device of the refrigerator door according to the embodiment; Figure 11 Schematic diagram of the structure of the elastic supporting member of the door glass peeling device of the refrigerator door according to the embodiment.

[0022] Reference numerals: 100, door base; 110, door body member; 120, door body side member; 131, first door frame; 132, second door frame; 133, third door frame; 134, fourth door frame; 200, door glass; 210, middle area; 220, edge area; 310, polyurethane foam; 320, hot melt adhesive; 410, electric heating component; 420, electromagnetic induction heating component; 430, electric heating wire; 441, first wiring terminal; 442, second wiring terminal; 500, machine body; 510, accommodation space; 600, rotating component; 700, positioning and fixing member; 710, corner positioning part; 711, plane pressing part; 712, limiting part; 720, supporting member; 721, first supporting cylinder; 722, second supporting rod; 723, elastic component; 810, positioning member; 811, positioning part; 820, elastic supporting member; 821, elastic base body; 822, supporting rod; 823, elastic component. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0024] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0025] The terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0026] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0028] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0029] The present invention provides a method for peeling the refrigerator door glass. The refrigerator door includes: A door base body 100 for constituting the support base body of the refrigerator door.

[0030] And a door glass 200 assembled on the door base body 100. An intermediate area 210 is formed in the middle of the door glass 200, and an edge area 220 is formed around the periphery of the intermediate area 210. A hot melt adhesive 320 connecting the two is provided between the edge area 220 and the door base body 100; During manufacturing, the wet-curing polyurethane type hot melt adhesive 320 is filled at the four peripheral edge positions of the door base body 100, and then the door glass 200 is attached to the top surface position of the door base body 100. The edge area 220 around the door glass 200 and the hot melt adhesive 320 around the door base body 100 are bonded together to realize the connection and fixation between the door glass 200 and the door base body 100.

[0031] The wet-curing polyurethane type hot melt adhesive 320 has high durability and can fix the glass on the door for a long time.

[0032] A foaming cavity is formed between the intermediate area 210 and the door base body 100, and polyurethane foam 310 is filled in the foaming cavity; Specifically, a printing surface is provided on the side of the door glass 200 close to the door base body 100, and the printing surface in the intermediate area 210 of the glass door is in contact with the polyurethane foam filled between the door base body 100 and the door glass 200.

[0033] The method for peeling the refrigerator door glass includes the following steps: Melting the hot melt adhesive 320: Using a heating heat source to transfer heat to the door glass 200 or / and the door base body 100; Controlling the heating heat source to continuously heat until the hot melt adhesive 320 melts; Since the hot melt adhesive 320 is connected between the door glass 200 and the door base body 100, to melt the hot melt adhesive 320, a heating heat source can be used to transfer heat to the door glass 200, and the heat is transferred from the door glass 200 to the hot melt adhesive 320 to melt it; Alternatively, a heat source is used to transfer heat to the door base 100, and the heat is transferred through the door base 100 to the hot melt adhesive 320 to melt it. Alternatively, a heat source is used to transfer heat to the door glass 200 and the door base 100 simultaneously, so that the door glass 200 and the door base 100 transfer heat to the hot melt adhesive 320 simultaneously to achieve a rapid melting effect.

[0034] Once the moisture-curing polyurethane hot melt adhesive 320 solidifies, its original softening temperature is about 100 - 150 °C. Even if it is heated again, it will not soften. However, when a heat source with a high enough temperature contacts the door glass 200 or the door base 100 to transfer the temperature to the hot melt adhesive 320, the moisture-curing polyurethane hot melt adhesive 320 connected to the door base 100 will start to thermally deform and melt, and the adhesion between the door base 100, the door glass 200 and the hot melt adhesive 320 will decrease.

[0035] At this time, although the adhesion of the hot melt adhesive 320 decreases, it still remains sticky. If a large piece of the door glass 200 is adsorbed and peeled off from the surface, the large piece of the door glass 200 may break.

[0036] At this time, it is necessary to fix the refrigerator door: fix the door base 100 and the door glass 200 bonded and fixed on the door base 100 respectively.

[0037] Lock and fix the door base 100, and it can be fixed by a special fixing device.

[0038] Support and fix the four corners of the door glass 200. After the glass heats up, it is necessary to fix the four corners of the door glass 200 in space so that it does not move.

[0039] The door base 100 and the door glass 200 are fixed by different devices. After the fixing is completed, the next step is to separate the door glass 200 and the door base 100.

[0040] Steps to separate the door base 100 and the door glass 200: Rotate the door base 100 and apply a horizontal shear force to the hot melt adhesive 320 and the polyurethane foam between the door base 100 and the door glass 200. During specific operation, a slight force can be applied to the fixing device of the door base 100 to make it rotate slightly clockwise or counterclockwise by 1 - 5 degrees.

[0041] Since both the door base body 100 and the door glass 200 are fixed by corresponding devices, when the door base body 100 rotates, since the door glass 200 is fixed in space, relative rotation will occur between the door base body 100 and the door glass 200, and a horizontal shearing force is applied to the hot melt adhesive 320 and the polyurethane foam between the door base body 100 and the door glass 200 through the rotation of the door base body 100; Through this operation method, a horizontal shearing force can be applied to the bonding part of the door glass 200, the hot melt adhesive 320 and the polyurethane foam with a small force. To cut off the connection between the hot melt adhesive 320 and the door glass 200. At this time, the door glass 200 is peeled off from the polyurethane foam, and the hot melt adhesive 320 will also spread. Therefore, the adhesion between the door glass 200 and the door base body 100 is greatly reduced.

[0042] Finally, the door glass 200 can be adsorbed and taken out, that is, the door glass 200 is adsorbed to separate the door glass 200 and the door base body 100.

[0043] Select heat-resistant suction cups and other components with adsorption performance that are adapted to the size of the door glass 200 to adsorb the door glass 200, so as to adsorb the whole door glass 200 evenly and stably from the door base body 100, realizing that the door glass 200 can be cleanly and completely separated without being broken.

[0044] In the method for peeling the refrigerator door glass in this embodiment, a heat source is used to heat and transfer heat to the hot melt adhesive 320 to melt it, and the door base body 100 is rotated to rotate relative to the door glass 200 to apply a horizontal shear stress, and the door glass 200 is completely peeled off by adsorption through an adsorption component. It not only realizes the completely clean peeling of the whole door glass 200 without being broken, but also the peeling is more thorough and the peeling effect is better. It can be completely and reliably peeled for different types of door glass 200, and is not limited by factors such as the printing layer of the door glass 200, and has stronger versatility; Moreover, the method for peeling the door glass 200 in this embodiment does not require professional peeling operation techniques. When performing the peeling operation, only need to heat and transfer heat to the hot melt adhesive 320 through a heating heat source, then rotate the door base body 100 to apply a horizontal shearing force, and finally adsorb the door glass 200. The whole peeling method is simple to operate and has little difficulty. It can be realized even by non-professional peeling personnel. The peeling time of the whole door glass 200 is short and the peeling efficiency is high.

[0045] In some embodiments of the present application, the heating heat source for transferring heat to the hot melt adhesive 320 is an electric heating component 410. The electric heating component 410 is a component that can be heated when powered on.

[0046] In some embodiments of the present application, the electric heating component 410 is a heating hot plate or a heating block, whose size is greater than or equal to the size of the door glass 200, has sufficient thickness, and can generate heat as a whole after being powered on.

[0047] Setting its size to be similar to or larger than the size of the door glass 200 can ensure that there is a sufficiently large contact area between the electric heating component 410 and the door glass 200. When the electric heating component 410 generates heat by heating, its heat transfer and conduction area is large, and thus the heat generated by it can be quickly transferred to the door glass 200 that is in contact with it, so that the door glass 200 can be quickly heated up to ensure the heat transfer and conduction effect.

[0048] During use, the electric heating component 410 is attached to the outer side surface of the door glass 200, and the electric heating component 410 is powered on to generate heat. For the convenience of heat conduction and placing the electric heating component 410, it can be directly attached to the outer side surface of the door glass 200 during setting.

[0049] The method for the electric heating component 410 to melt the hot melt adhesive 320 is as follows: Power on to generate heat, transfer the heat to the door glass 200 that is in contact with it, and heat the door glass 200 to a temperature above the first preset temperature, so as to transfer the heat to the hot melt adhesive 320 connecting the door glass 200 and the door glass 200 to melt it.

[0050] After the electric heating component 410 is powered on, its temperature will continuously rise. Since it is attached to the outer side surface of the door glass 200, the heat will be transferred to the door glass 200. Since the edge area 220 of the door glass 200 is in contact with the hot melt adhesive 320, finally, the heat will be transferred to the hot melt adhesive 320, causing the hot melt adhesive 320 to deform and melt.

[0051] Once the moisture-curing polyurethane hot melt adhesive 320 solidifies, its original softening temperature is about 100 - 150 °C. Even if it is heated again, it will not soften.

[0052] However, as long as it can be ensured that the electric heating component 410 with a sufficiently high temperature is in contact with the door glass 200, when the entire door glass 200 reaches a high temperature above 250 °C, the moisture-curing polyurethane hot melt adhesive 320 connected to the door base 100 will start to thermally deform and melt, and the adhesion between the door base 100 and the hot melt adhesive 320 will also decrease.

[0053] The first preset temperature in this embodiment is 250 °C.

[0054] When the door glass 200 is heated to the first preset temperature, the hot melt adhesive 320 still remains sticky. At this time, if a large piece of glass is adsorbed and peeled off from the door surface, the large piece of glass may break.

[0055] Therefore, after the glass is heated, the four corners of the glass need to be quickly fixed in space to prevent it from moving. Then, the fixing device of the fixed door base 100 needs to be slightly rotated clockwise or counterclockwise by about 1 to 5 degrees.

[0056] By this method, a small force can be used to apply a horizontal shear force to the bonding part of the door glass 200, the polyurethane foam, and the hot melt adhesive 320.

[0057] When the door base 100 rotates relative to the door glass 200, due to the horizontal shear force, the door glass 200 peels off from the foam, and the hot melt adhesive 320 also spreads. Therefore, the adhesion between the glass and the door body is greatly reduced.

[0058] Finally, a heat-resistant suction cup is used to adsorb the glass and evenly adsorb the entire glass. Therefore, the door glass 200 can be cleanly separated without being broken.

[0059] In some embodiments of the present application, the electric heating component 410 is an electric heating tube, which is arranged in a spiral coil and evenly covers the outer side surface of the door glass 200.

[0060] The electric heating tube arranged in a spiral coil can also ensure that it has a sufficiently large contact area with the door glass 200 when energized, so as to transfer the generated heat to the door glass 200 in contact with it over a large area, and then transfer it to the position of the hot melt adhesive 320.

[0061] In some embodiments of the present application, the electric heating component 410 is an annular electric heating sheet, which is arranged along the edge area 220 of the door glass 200 and fits on the outer side surface of the door glass 200 to ensure that the heat generated by the electric heating sheet can be directly transferred to the hot melt adhesive 320 through the door glass 200, ensuring the heating effect on the hot melt adhesive 320.

[0062] In some embodiments of the present application, if there is a thin plastic outer frame around the door glass 200, the door glass 200 needs to be removed in advance by cutting it on the side or other methods before heating the door glass 200.

[0063] When heating from one side of the surface of the door glass 200, the electric heating component 410 with a high temperature and sufficient heat capacity needs to be contacted with the entire glass in front of the door base 100.

[0064] In some embodiments of the present application, the door base 100 of the refrigerator door is a door body for a cold storage, which includes: A door body member 110, which is horizontally arranged and is a plastic part.

[0065] Specifically, the door body member 110 is a door body plate with a certain thickness, and its material is resin.

[0066] The door side member 120 is connected to the periphery of the door body member 110 and is arranged perpendicular to the door body member 110, and its material is metal.

[0067] The door side member 120 is a door side steel plate, which can be adhesively fixed at the peripheral positions of the door body or embedded into the peripheral positions of the door body member 110 to be fixedly connected with the door body member 110.

[0068] That is, the door base 100 of some cold storage doors adopts a structural form of resin and steel plate.

[0069] The hot melt adhesive 320 is provided between the door side member 120 and the door glass 200; Specifically, the hot melt adhesive 320 is provided at the top surface position of the door side member 120 for connecting the door glass 200 and the door base 100.

[0070] For the door structure of this type, since the door body member 110 is made of resin material, therefore, the corresponding heating heat source can adopt an electromagnetic induction heating element for heating.

[0071] The heating heat source is an electromagnetic induction heating component 420, which is arranged in contact with the outer side surface of the door glass 200. The electromagnetic induction heating component 420 can be an electromagnetic induction heating plate or an electromagnetic induction heating block.

[0072] The method for melting the hot melt adhesive 320 is as follows: Connect the high-frequency AC power supply. When current flows through the coil of the electromagnetic induction heating component 420, magnetic flux is generated to cause eddy current heating in the door side member 120, so as to transfer the heat to the hot melt adhesive 320 connected thereto.

[0073] After the high-frequency AC power supply is connected, current will flow through the coil inside the electromagnetic induction heating component 420, and an alternating magnetic field is generated through the coil. Since the door side member 120 is a metal part and it is a magnetic conductor, the door side member 120 is placed therein and will cut the alternating magnetic force lines, thereby generating an alternating current, that is, eddy current, inside the door side member 120. The eddy current makes the atoms inside the object move at high speed and randomly, and the atoms collide and rub against each other to generate heat energy.

[0074] When the electromagnetic induction heating component 420 is energized, it will cause the door side member 120 in the magnetic field to quickly generate heat, and then the heat can be transferred to the hot melt adhesive 320 in contact and cooperation with it to achieve the effect of melting the hot melt adhesive 320.

[0075] By performing electromagnetic induction heating on the entire refrigerator door, the hot melt adhesive 320 in contact with the door body side member 120 is heated to a temperature above 250°C.

[0076] Specifically, the electromagnetic induction heating component 420 can be attached to the outer side of the door glass 200. By using electromagnetic induction heating on one side of the attached door glass 200, the temperature of the part of the door body side member 120 reaches above 250°C, and the polyurethane hot melt adhesive 320 in contact with it begins to melt, and the adhesion between the refrigerator door body and the glass begins to decrease.

[0077] The polyurethane hot melt adhesive 320 hardens due to moisture. Once cured, even when heated to the initial softening temperature of about 100 to 150°C, it is not easily softened and must be heated to above 250°C to start melting. The hot melt adhesive 320 in contact with the door body side member 120 is heated to above 250°C to cause its thermal deformation and melting.

[0078] After the glass is heated, the four corners of the glass need to be quickly fixed in space so that it does not move. Then, the fixing device of the fixed door base 100, etc., needs to be slightly rotated clockwise or counterclockwise by about 1 to 5 degrees.

[0079] By this method, a horizontal shear force can be applied to the bonding part of the door glass 200, polyurethane foam, and hot melt adhesive 320 with a small force.

[0080] When the door base 100 rotates relative to the door glass 200, due to the horizontal shear force, the door glass 200 peels off from the foam, and the hot melt adhesive 320 also spreads, so the adhesion between the glass and the door body is greatly reduced.

[0081] Since the door glass 200 does not heat up under the action of the electromagnetic induction heating component 420, the glass is at room temperature. Finally, the door glass 200 can be safely removed using the adsorption tube of a conventional rubber adsorption disk, and the door glass 200 can be cleanly separated without being broken.

[0082] In some embodiments of the present application, the door base 100 includes: The door body member 110 is horizontally arranged. The door body member 110 is a door body plate and is horizontally arranged.

[0083] The door member frame is connected to the periphery of the door body member 110 and is arranged along the circumferential direction of the door body member 110.

[0084] The door member frame can be integrally bent and formed with the door body member 110 during molding, or can be formed separately from the door body member 110 and then connected and fixed together.

[0085] A hot melt cavity is bonded to the surface of the door member frame opposite to the door glass 200. The door member frame has a first bonding surface facing the door glass 200, and the hot melt adhesive 320 is provided on the first bonding surface. It is connected and fixed to the door glass 200 through the hot melt adhesive 320.

[0086] The heating heat source is an electric heating wire 430, which is buried between the hot melt adhesive 320 and the first bonding surface of the door member frame, and is arranged along the circumferential direction of the door member frame. When a voltage is applied to both ends of the electric heating wire 430, it can generate heat, so that it can transfer heat to the hot melt adhesive 320 to melt it.

[0087] The method for the electric heating wire 430 to melt the hot melt adhesive 320 is as follows: Apply a voltage to both ends of the electric heating wire 430 to make it generate heat to melt the hot melt adhesive 320 in contact with it.

[0088] In some embodiments of the present application, the door member frame includes: a first door frame 131, a second door frame 132, a third door frame 133, and a fourth door frame 134. The electric heating wire 430 includes: A first electric heating wire 430 segment, a second electric heating wire 430 segment, a third electric heating wire 430 segment, and a fourth electric heating wire 430 segment, which are respectively arranged on the first door frame 131, the second door frame 132, the third door frame 133, and the fourth door frame 134; The electric heating wire 430 segment arranged on at least one of the door frames is a bent electric heating curve segment; Or, the electric heating wire 430 segment arranged on at least one of the door frames is an electric heating straight segment.

[0089] To achieve a better hot melting heating effect on the hot melt adhesive 320, electric heating wires 430 are arranged on the first door frame 131, the second door frame 132, the third door frame 133, and the fourth door frame 134 of the door member frame, that is, a first electric heating wire 430 segment, a second electric heating wire 430 segment, a third electric heating wire 430 segment, and a fourth electric heating wire 430 segment are respectively arranged to heat the hot melt adhesive 320 at each door frame correspondingly, ensuring the uniformity of heating the hot melt adhesive 320.

[0090] In some embodiments of the present application, the multi-segment electric heating wire 430 segments arranged on multiple door frames are all straight segments, and are arranged on the door member frame in a straight line manner for heat exchange.

[0091] Or, some are straight segments and some are curve segments, and the straight segments and curve segments are alternately arranged on multiple door frames. By setting the curve segments, the contact area between the electric heating wire 430 and the hot melt adhesive 320 can be increased, and the hot melting effect on the hot melt adhesive 320 can be improved.

[0092] In some embodiments of the present application, the multiple wire segments are all curved segments, and the shape of the curved segment can be wavy. By setting the heating wires 430 arranged on multiple door frames into a curved shape, the contact area with the hot melt adhesive 320 can be further increased, the heat exchange effect can be enhanced, the heat exchange efficiency with the hot melt adhesive 320 can be improved, and the melting of the hot melt adhesive 320 can be accelerated.

[0093] In some embodiments of the present application, the end of the heating wire 430 is provided with: a first wiring terminal 441, which is arranged at one corner position of the door base 100 and extends outward from the door base 100; a second wiring terminal 442, which is located at the same corner position as the first wiring terminal 441 and extends outward from the door base 100; The first wiring terminal 441 and the second wiring terminal 442 at both ends of the heating wire 430 are arranged at inconspicuous positions at the four corners of the door base 100 for use as wiring terminals to connect to the outside, and the overall aesthetics is good.

[0094] An insulating component, which is arranged between the first wiring terminal 441 and the second wiring terminal 442 and is used to separate the first wiring terminal 441 and the second wiring terminal 442.

[0095] The insulating component is insulating rubber or an insulating sheet to insulate the first wiring terminal 441 and the second wiring terminal 442 and prevent the two from contacting and short-circuiting.

[0096] When manufacturing the refrigerator door, a heating wire 430 is fixed on the door base 100 of the refrigerator door to surround the door member frame, and the first wiring terminal 441 and the second wiring terminal 442 at both ends extend outward from the corner positions of the door base 100 to serve as connection terminals; The heated polyurethane hot melt adhesive 320 is stacked on the heating wire 430 for filling, ensuring that the first wiring terminal 441 and the second wiring terminal 442 at both ends are partially exposed and not completely covered by the hot melt adhesive 320; the polyurethane hot melt adhesive 320 is filled on the four sides where the heating wire 430 is laid.

[0097] After hot melt filling, the door glass 200 and the door base 100 are aligned and bonded together to manufacture the refrigerator door.

[0098] Since the polyurethane-based hot melt adhesive 320 has the characteristic of moisture curing, it has high durability and is suitable for fixing the door glass 200 on the door for a long time. In addition, the central part of the glass printing surface is in contact with the polyurethane foam.

[0099] To ensure the separation effect, wax paper or the like can be pre-pasted to prevent the cured polyurethane foam from firmly adhering to the door glass 200.

[0100] During the recycling process after the refrigerator is scrapped, wires are connected to the first terminal 441 and the second terminal 442, and a voltage is applied across both ends of the heating wire 430, causing the heating wire 430 to reach a specific high temperature. The hot melt adhesive 320 will undergo thermal denaturation and melting, resulting in a weakened adhesion force to the refrigerator body.

[0101] Once the polyurethane-based hot melt adhesive 320 is cured, it is not easily softened even when heated to around 100 - 150 °C, which is its initial softening temperature. It must be heated to a high temperature above 250 °C to start melting.

[0102] In some embodiments of the present application, the heating wire 430 is a nickel-chromium alloy wire The outer diameter of the nickel-chromium alloy wire is 0.8 - 1 mm, and the resistance is 2.15 Ω / m.

[0103] When heating, a DC voltage of 80 V can be applied across its two ends for a duration of 60 seconds.

[0104] If the length of the nickel-chromium alloy wire is 2 m, the current flowing through it is 80 V / (2.15 x 2) = 18.6 A, and the heat generated by the nickel-chromium alloy wire = (18.6 A)² x 4.3 Ω x 60 s = 89,258 (J).

[0105] If all this heat is used to raise the temperature of the hot melt adhesive 320, assuming the specific heat of polyurethane is 1.8 J / g•K and the amount of hot melt adhesive 320 used for each piece of glass is 200 g, 89,258 / (1.8 x 200) = 248 K, then the temperature of the hot melt adhesive 320 may rise by 248 °C and soften.

[0106] Since the polyurethane-based hot melt adhesive 320 can maintain its viscosity even in a molten state, there is a risk of glass breakage when a large glass is adsorbed on a device such as a suction cup and peeled off.

[0107] Therefore, at the four glass corners, it is fixed in space by a fixture, and at the same time, by fixing the door base 100, it is gently rotated clockwise or counterclockwise by about 1 - 5 degrees.

[0108] By this method, a horizontal shear force can be applied to the bonding part between the glass and the polyurethane foam with a small force.

[0109] When the door glass 200 is peeled off from the polyurethane foam, the hot melt adhesive 320 will also spread, so the adhesion between the door glass 200 and the door body is greatly reduced. If the surface of the door glass 200 does not heat up significantly, it can be safely disassembled using an ordinary rubber suction cup.

[0110] If there is temperature rise, a high-temperature-resistant suction cup can be used to adsorb the door glass 200.

[0111] In some embodiments of the present application, before foaming the door glass 200 and the door base 100, a release paper is laid on the printing surface at the middle region 210 of the door glass 200.

[0112] If the release paper is not used in a part of the middle region 210 of the door glass 200, the door glass 200 and the polyurethane foam may still stick together even at a high temperature of 250 °C.

[0113] In order to make it easier to disassemble the door glass 200 when it is discarded, a release paper such as wax paper or release paper can be pre - pasted at the printing surface of the door glass 200 to prevent firm contact connection between the polyurethane foam and the door glass 200. Through the release paper, the door glass 200 and the polyurethane foam can be effectively isolated, so that the door glass 200 can be more easily separated from the door base 100 during separation, ensuring the separation effect.

[0114] A refrigerator door glass peeling device for a refrigerator door glass peeling method is used to quickly position and fix the refrigerator door and the door glass 200 when the heating heat source transfers heat to the hot melt adhesive 320, and assist in quickly separating the door glass 200 and the refrigerator door.

[0115] The refrigerator door glass peeling device includes: A body 500, on which a receiving space 510 with an open top is formed; In some embodiments of the present application, the body 500 includes a box body, and the receiving space 510 is formed in the box body.

[0116] Support legs for supporting and fixing the box body are provided at the bottom of the box body. Four support legs are provided and are respectively arranged at the four corner positions of the box body.

[0117] A rotating member 600, arranged in the receiving space 510, which is rotatable; The rotating member 600 is a turntable, and a rotating device for driving its rotation is provided at the bottom to drive its rotation. The rotating device can be a rotating motor, etc., and it can be rotatably connected to the base through a bearing.

[0118] The rotating member 600 is mainly used to carry and fix the door base 100.

[0119] A locking and positioning assembly, arranged on the rotating member 600, for positioning the refrigerator door placed on the rotating member 600; In some embodiments of the present application, the locking and positioning assembly includes: A positioning member 810, arranged on the rotating member 600, for positioning the side of the door base 100; The positioning member 810 includes a positioning body portion, which is arranged in a manner that fits the rotating member 600; A positioning portion 811, which is arranged perpendicular to the positioning body portion and is used to abut against the side portion of the door base body 100 to limit the door base body 100.

[0120] During molding, the positioning member 810 can be integrally formed by bending.

[0121] An elastic support member 820, one end of which is supported on the side wall of the accommodation space 510 and the other end of which abuts against the positioning member 810.

[0122] When the positioning member 810 is arranged, four are provided and respectively abut against the four side positions of the door base body 100. Four elastic support members 820 are also correspondingly provided and respectively cooperate with the four positioning members 810.

[0123] When positioning the door base body 100, one end of the elastic support member 820 can abut against the side wall of the box body and the other end can abut against and press on the positioning portion 811 to press and fix one side of the door base body 100. The four side edges of the door base body 100 are all pressed and fixed by the four positioning members 810 and the four elastic support members 820, thereby realizing the fixation of the door base body 100.

[0124] In some embodiments of the present application, the elastic support member 820 includes: An elastic base body 821, which is fixed on the side wall of the box body and can be a substrate, and its shape can be a long strip or a square.

[0125] A support rod 822, one end of which is fixed to the elastic base body 821 and the other end of which is fixed to an elastic member 823, and the elastic member 823 is used to abut against the limiting portion 712 of the positioning member 810.

[0126] Since in this embodiment, when separating the door glass 200, it is necessary to drive the door base body 100 to rotate through the rotating member 600. By providing the elastic support member 820, it can be ensured that when the rotating member 600 drives the door base body 100 to rotate, its elastic deformation can ensure that it will not interfere with the rotation of the door base body 100, and moreover, it can always keep abutting and pressing on the door base body 100 to ensure the firmness and reliability of the positioning of the door base body 100.

[0127] Moreover, through the setting of the elastic support member 820, it can be made to adaptively position and fix door base bodies 100 of different sizes.

[0128] When the size of the door base body 100 is relatively small, the elastic support member 820 can press the positioning member 810 to position it; When the size of the door base body 100 is relatively large, the elastic support member 820 can also press and hold the positioning member 810 through its elastic deformation, making its adaptability high.

[0129] There are 4 sets of support and positioning components, which are respectively arranged at the four corner positions of the door glass 200, and are used to support on the wall of the accommodation space 510 and clamp and position the corners of the door glass 200.

[0130] The four corners of the door glass 200 can be positioned through the 4 sets of support and positioning components, thereby realizing the support and fixation of the entire door glass 200 at the spatial position.

[0131] In some embodiments of the present application, the support and positioning components include: The positioning and fixing member 700 is mainly used to position the corner positions of the door glass 200. The door glass 200 has a certain thickness, and its corners are composed of two intersecting and perpendicular side surfaces, a top surface, and a bottom surface.

[0132] The positioning and fixing member 700 is formed with a corner positioning portion 710, which is clamped at the corner of the door glass 200 to position it.

[0133] Specifically, the positioning and fixing member 700 includes: The planar pressing portion 711 is pressed against the top surface position of the corner of the door glass 200; The planar pressing portion 711 is a planar pressing plate, which is attached to and pressed and fixed at the top surface of the corner of the door glass 200; There are 2 limiting portions 712, which are respectively abutted against the two intersecting side surface positions of the corner of the door glass 200, and the ends of the 2 limiting portions 712 intersect.

[0134] The limiting portion 712 is a limiting plate, which is connected to the planar pressing portion 711 and is perpendicular to the planar pressing portion 711. The ends of the 2 limiting portions 712 intersect to form a right angle and are clamped at the corner position of the door glass 200.

[0135] When the positioning and fixing member 700 is clamped on the door glass 200, the planar pressing portion 711 is pressed against the top surface position of the corner of the door glass 200, and the limiting portion 712 is clamped at the two side surface positions of the door glass 200.

[0136] There are 2 support members 720, both of which abut against the limiting portion 712 at one end and abut against the wall of the accommodation space 510 at the other end.

[0137] The support member 720 provides a support force to the positioning and fixing member 700, so that it firmly locks and fixes the door glass 200.

[0138] In some embodiments of the present application, the support member 720 includes: The first support cylinder 721; And a second support rod 722 disposed within the first support cylinder 721. An elastic member 723 is provided between the end of the second support rod 722 and the end of the first support cylinder 721. The elastic member 723 is a spring or an elastic sheet.

[0139] During use, the first support cylinder 721 of the support member 720 is abutted against the inner wall of the box body, and the end of the second support rod 722 is abutted against the limiting portion 712. Due to the elastic force of the elastic member 723, the first support cylinder 721 and the second support rod 722 can be maintained in the support position to lock and fix the positioning fixture 700.

[0140] Since the second support rod 722 is located within the first support cylinder 721, it can move relative to the first support cylinder 721 to change its position, thereby realizing its telescopic adjustment.

[0141] When it is necessary to support and fix door glasses 200 of different sizes, it can adjust the length of its protrusion relative to the first support cylinder 721 by compressing the elastic member 723 to cause it to deform, so as to adapt to the support and fixation of door glasses 200 of different sizes, and has strong versatility.

[0142] Two support members 720 are provided at the corners of each door glass 200, respectively supporting at two limiting portion 712 positions. In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0143] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A method for peeling a refrigerator door glass, the refrigerator door comprising: A door base body; And a door glass assembled on the door base body, with an intermediate area and an edge area located around the intermediate area formed on the door glass; Polyurethane foam is provided between the intermediate area and the door base body; There is a hot melt adhesive connecting the edge area and the door base body; it is characterized in that, The method for peeling the refrigerator door glass includes the following steps: Melting the hot melt adhesive: Using a heating heat source to transfer heat to the door glass or / and the door base body; Controlling the heating heat source to continuously heat until the hot melt adhesive melts; Fixing the refrigerator door: Locking and fixing the door base body and supporting and fixing the four corners of the door glass; Separating the door base body and the door glass: Rotating the door base body and applying a horizontal shearing force to the hot melt adhesive and the polyurethane foam between the door base body and the door glass; Adsorbing the door glass and separating the door glass and the door base body.

2. The method for peeling a refrigerator door glass according to claim 1, wherein The heating heat source is an electric heating component, and its size is greater than or equal to the size of the door glass. The method for melting the hot melt adhesive is: Attaching the electric heating component to the outer side surface of the door glass; Applying electricity to heat the door glass to a temperature above a first preset temperature to transfer the heat to the hot melt adhesive connected to the door glass and melt it.

3. The method for peeling a refrigerator door glass according to claim 1, wherein The door base body includes: A door body member, horizontally arranged, which is a plastic part; A door body side member, connected to the periphery of the door body member, arranged perpendicular to the door body member, and made of metal. The hot melt adhesive is provided between the door body side member and the door glass; The heating heat source is an electromagnetic induction heating component. The method for melting the hot melt adhesive is: Attaching the electromagnetic induction heating component to the door glass; Connecting to a high-frequency alternating current power supply so that an electric current flows through the coil of the electromagnetic induction heating component to generate a magnetic field and cause eddy current heating in the door body side member.

4. The method for peeling a refrigerator door glass according to claim 1, wherein The door base body includes: A door body member, horizontally arranged; A door member frame, connected to the periphery of the door body member, arranged along the circumferential direction of the door body member, and a hot melt cavity is bonded to the opposite surface of the door member frame and the door glass; The heating heat source is an electric heating wire, buried between the hot melt adhesive and the door member frame, arranged along the circumferential direction of the door member frame. The method for melting the hot melt adhesive is: Applying a voltage to both ends of the electric heating wire to make it heat up and melt the hot melt adhesive in contact with it.

5. The method for peeling a refrigerator door glass according to claim 4, wherein The door member frame includes: a first door frame, a second door frame, a third door frame, and a fourth door frame. The electric heating wire includes: A first electric heating wire segment, a second electric heating wire segment, a third electric heating wire segment, and a fourth electric heating wire segment, respectively arranged on the first door frame, the second door frame, the third door frame, and the fourth door frame; The electric heating wire segment arranged on at least one of the door frames is a bent electric heating curve segment; Or, the electric heating wire segment arranged on at least one of the door frames is an electric heating straight segment.

6. The method for peeling a refrigerator door glass according to claim 5, wherein The end of the heating wire is provided with: a first wiring terminal, arranged at one of the corner positions of the door base body and extending outwards from the door base body; a second wiring terminal, located at the same corner position as the first wiring terminal and extending outwards from the door base body; an insulating component, arranged between the first wiring terminal and the second wiring terminal for separating the first wiring terminal and the second wiring terminal.

7. The method for peeling the refrigerator door glass according to any one of claims 1-6, characterized in that before foaming the door glass and the door base body, a peeling paper is laid on the printing surface at the middle area of the door glass.

8. A refrigerator door glass peeling device for the refrigerator door glass peeling method according to any one of claims 1-7, characterized in that, It includes: a body, on which a receiving space with an open top is formed; a rotating component, arranged in the receiving space and rotatable; a locking and positioning assembly, arranged on the rotating component for positioning the door base body placed on the rotating component; a supporting and positioning assembly, with 4 groups, respectively arranged at the 4 corner positions of the door glass for supporting on the wall of the receiving space and clamping and positioning the corners of the door glass.

9. The refrigerator door glass peeling device according to claim 8, characterized in that, The supporting and positioning assembly includes: a positioning and fixing member, including: a corner positioning portion for clamping at the corner of the door glass; a supporting member, one end abuts against the corner positioning portion and the other end abuts against the wall of the receiving space.

10. The refrigerator door glass peeling device according to claim 8, characterized in that, The locking and positioning assembly includes: a positioning member, arranged on the rotating component for positioning the side of the refrigerator door; an elastic supporting member, one end supports on the side wall of the receiving space and the other end abuts against the positioning member.

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