Refrigerator air duct composite surface light source and manufacturing method thereof

Abstract

The application discloses a refrigerator air duct composite surface light source and a manufacturing method thereof. The refrigerator air duct composite surface light source is characterized by the following technical scheme. A diffusion layer is provided with a frame formed by silk-screen printing on the surface of the diffusion layer. A wire harness is connected with an LED light bar. An air duct injection molding part is provided with a frame structure, and a dot gluing groove and a threading groove are arranged at the edge of the air duct injection molding part. The wire harness, the LED light bar and a light guide layer are arranged in the air duct injection molding part, and the LED light bar is opposite to the light guide layer. A glue layer is arranged in the dot gluing groove, and the diffusion layer is connected with the air duct injection molding part through the glue layer. The end of the wire harness is inserted into the threading groove, and sealing glue is arranged in the threading groove. The refrigerator air duct composite surface light source can reduce material use, reduce manual assembly time, greatly reduce cost and facilitate subsequent automatic assembly. The refrigerator air duct composite surface light source completely solves the waterproof problem of the surface light source from the structure, and greatly improves the waterproof grade of the surface light source.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of refrigerators and freezers, and particularly relates to a refrigerator air duct composite surface light source and a manufacturing method thereof. BACKGROUND

[0002] At present, the surface light sources used in almost all refrigerators and freezers on the market are assembled by manual operation. The specific steps are roughly as follows: the light guide layer, diffusion layer, reflection layer and the like of the optical module are attached one by one with double-sided adhesive, and the edges are sealed with transparent tape, and then an aluminum alloy or plastic frame is assembled. The surface light source has the following defects: 1. The assembly process is relatively complex, and it is difficult to realize automatic production; 2. Due to the continuous rise in labor costs, it is difficult for enterprises to recruit workers, and it is difficult to ensure timely completion of customer orders; 3. The attachment process is complex, the amount of glue used is large, the adhesion of the glue will decrease after being exposed to water, and manual operation is also unstable, which cannot meet the waterproof requirements.

[0003] In addition, the ordinary surface light source in the prior art is a surface light source assembly product assembled in a surface light source factory, and then the surface light source product is sent to an air duct assembly factory, and then installed on the air duct assembly by screwing, buckling and the like. The surface light source has the following defects: the use of materials is relatively large, and the assembly process is repeated, resulting in relatively high cost. SUMMARY

[0004] In view of at least one of the above problems of the surface light source used in the refrigerator and freezer in the prior art, the present application provides a refrigerator air duct composite surface light source and a manufacturing method thereof, which solves the waterproof problem of the surface light source from the structure, greatly improves the waterproof grade of the surface light source, reduces the manual assembly time, reduces the use of materials, saves the cost of materials and labor, and is conducive to subsequent automatic assembly. The surface light source and the air duct assembly are combined, the two separate products of the surface light source and the air duct assembly in the prior art are integrated into one assembly, and the cost is greatly reduced.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a refrigerator air duct composite surface light source, comprising:

[0007] a diffusion layer, the surface of which is screen printed to form a frame;

[0008] a light guide layer;

[0009] a wire harness connected with an LED light bar;

[0010] The air duct injection molding part is arranged in a frame structure, and a point gluing groove and a threading groove are arranged at the edge of the frame structure; the wire harness, the LED light bar and the light guide layer are arranged in the air duct injection molding part, and the LED light bar faces the light guide layer; a glue layer is arranged in the point gluing groove, and the diffusion layer and the air duct injection molding part are connected by the glue layer; the end of the wire harness is threaded into the threading groove, and sealing glue is arranged in the threading groove.

[0011] The refrigerator air duct composite surface light source of the present application is composed of the diffusion layer, the light guide layer and the wire harness connected with the LED light bar, and the air duct injection molding part constitutes an air duct back plate, which integrates the original surface light source and air duct back plate into one, can save material cost and labor cost, and is beneficial to subsequent automatic assembly; and can completely solve the waterproof problem of the surface light source from the structure, greatly improving the waterproof grade of the surface light source.

[0012] Preferably, the refrigerator air duct composite surface light source further comprises a reflective layer arranged between the light guide layer and the air duct injection molding part.

[0013] Preferably, the diffusion layer, the light guide layer, the reflective layer and the LED light bar are all arranged in a rectangular shape, and the air duct injection molding part is arranged in a rectangular frame.

[0014] Preferably, a gap is arranged between the light guide layer and the diffusion layer.

[0015] Preferably, the wire harness, the LED light bar and the light guide layer are fixed in the air duct injection molding part.

[0016] Preferably, the LED light bar connected to the wire harness is arranged in at least two and uniformly distributed.

[0017] Preferably, anti-glue overflow bosses are arranged on both sides of the point gluing groove.

[0018] Preferably, the point gluing groove is a semi-cylindrical groove.

[0019] Preferably, the number of point gluing grooves is at least two, and they are arranged uniformly at the edge of the air duct injection molding part.

[0020] On the other hand, the present application provides a manufacturing method of a refrigerator air duct composite surface light source, which is used to manufacture the refrigerator air duct composite surface light source of one aspect of the present application, and comprises the following steps:

[0021] Step S1, silk screen printing of the diffusion layer: forming a frame on the surface of the diffusion layer by silk screen printing;

[0022] Step S2, connecting the LED light bar to the wire harness: connecting the LED light bar to the wire harness;

[0023] Step S3, the air duct injection molding part is provided with a dispensing groove and the threading groove: the air duct injection molding part is provided with a frame structure, and the dispensing groove and the threading groove are arranged at the edge of the air duct injection molding part;

[0024] Step S4, the wire harness, the LED light bar and the light guide layer are arranged in the air duct injection molding part: the wire harness, the LED light bar and the light guide layer are arranged in the air duct injection molding part in sequence, and the LED light bar is arranged opposite to the light guide layer;

[0025] Step S5, the diffusion layer is adhesively bonded and pressed to the air duct injection molding part: the glue layer is arranged in the dispensing groove, and the diffusion layer is bonded and connected to the air duct injection molding part through the glue layer;

[0026] Step S6, the threading groove is sealed: the end of the wire harness is threaded into the threading groove, and sealing glue is arranged in the threading groove.

[0027] The refrigerator air duct composite surface light source and the manufacturing method thereof can achieve the following beneficial effects:

[0028] 1. The diffusion layer, the light guide layer and the wire harness connected with the LED light bar constitute a surface light source component, the air duct injection molding part constitutes a back plate component of the prior art, the original surface light source and the air duct back plate are integrated into one, thereby reducing material use, reducing manual assembly time, reducing material use, saving material cost and labor cost, greatly reducing cost, and facilitating subsequent automatic assembly.

[0029] It avoids the traditional double-sided adhesive tape and transparent adhesive tape bonding method used in the conventional surface light source, and completely solves the problem of substandard waterproofing caused by poor manual adhesive or insufficient adhesive viscosity. It completely solves the waterproofing problem of the surface light source from the structure, greatly improving the waterproofing grade of the surface light source.

[0030] 2. It eliminates the aluminum alloy frame and other components used to clamp and fix the optical module in the prior art, which is conducive to reducing and simplifying the process, saving labor cost, facilitating automatic assembly by a mechanical hand, and greatly improving production efficiency.

[0031] 3. The diffusion layer is provided as a diffusion plate, which is an appearance part and has the functions of the diffusion layer and the appearance layer. The diffusion layer can be directly arranged outside, and a peripheral screen printing structure can be used to replace the structure of the prior art that uses an aluminum alloy frame around the diffusion plate, thereby reducing material cost and labor assembly cost.

[0032] 4. A gap can be provided between the light guide layer and the diffusion layer to avoid poor lighting. The light guide layer can be fixed on the air duct injection molding part, which is conducive to ensuring that a gap is provided between the light guide layer and the diffusion layer.

[0033] 5、Its LED light bar can be fixed on the air duct injection molding, it is favorable to guarantee that the LED light bar is right to the light guide layer, and guarantees the light emitting effect.

[0034] 6、Its dispensing groove both sides are provided with anti overflow glue boss respectively, it is favorable to form the glue containing space between the air duct injection molding and the diffusion layer, it is favorable to accommodate the glue layer, and avoid overflow glue when the diffusion layer and the air duct injection molding are pressed together;Anti overflow glue boss and dispensing groove can be provided with gap distance, it is more favorable to accommodate the glue layer, and effectively prevent overflow glue. BRIEF DESCRIPTION OF DRAWINGS

[0035] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application, the illustrative embodiments of the present application and its description are used to explain the present application, and do not constitute improper limitation to the present application. In the drawings:

[0036] Figure 1 It is the exploded structure schematic diagram of the refrigerator air duct composite surface light source of the present application.

[0037] Figure 2 It is the structure schematic diagram of the refrigerator air duct composite surface light source of the present application.

[0038] Figure 3 It is the front view of the refrigerator air duct composite surface light source of the present application.

[0039] Figure 4 It is Figure 3 A-A section view in the figure.

[0040] Figure 5 It is Figure 4 I in the figure. Local enlarged view.

[0041] Figure 6 It is Figure 3 B-B section view in the figure.

[0042] Figure 7 It is Figure 3 C-C section view in the figure.

[0043] Figure 8 It is Figure 7 II in the figure. Local enlarged view.

[0044] Figure 9 It is the dispensing groove structure schematic diagram of the refrigerator air duct composite surface light source of the present application.

[0045] Figure 10 It is the threading groove structure schematic diagram of the refrigerator air duct composite surface light source of the present application.

[0046] Figure 11 It is the flow chart of the manufacturing method of the refrigerator air duct composite surface light source of the present application.

[0047] Reference signs in the drawings:

[0048] 1 is a diffusion layer, 2 is a light guide layer, 3 is a wire harness, 4 is an LED light bar, 5 is a wind channel injection molding part, 501 is a glue dispensing groove, 502 is a threading groove, 503 is a glue overflow prevention boss, 6 is a reflection layer, and 7 is a gap. DETAILED DESCRIPTION

[0049] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be described below in conjunction with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some 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 work fall within the scope of protection of the present application.

[0050] The technical solutions provided by the embodiments of the present application will be described in detail below in conjunction with the drawings. EMBODIMENT

[0051] Please refer to Figures 1 to 10 A refrigerator wind channel composite surface light source includes a diffusion layer 1, a light guide layer 2, a wire harness 3, and a wind channel injection molding part 5. The surface of the diffusion layer 1 is screen printed to form a frame. The wire harness 3 is connected with an LED light bar 4. The wind channel injection molding part 5 is provided in a frame structure, and a glue dispensing groove 501 and a threading groove 502 are arranged at the edge thereof. The wire harness 3, the LED light bar 4, and the light guide layer 2 are arranged in the wind channel injection molding part 5, and the LED light bar 4 faces the light guide layer 2. A glue layer is arranged in the glue dispensing groove 501, and the diffusion layer 1 and the wind channel injection molding part 5 are press-fit connected through the glue layer. The end of the wire harness 3 penetrates into the threading groove 502, and sealing glue is arranged in the threading groove 502.

[0052] The refrigerator wind channel composite surface light source of the present embodiment includes the diffusion layer 1, the light guide layer 2, and the wire harness 3 connected with the LED light bar 4, which constitute a surface light source component. The wind channel injection molding part 5 corresponds to the wind channel back plate component of the prior art, and integrates the original surface light source and the wind channel back plate into one, thereby reducing material use, reducing manual assembly time, saving material cost and labor cost, greatly reducing cost, and facilitating subsequent automatic assembly. In addition, it completely solves the waterproof problem of the surface light source from the structure, and greatly improves the waterproof grade of the surface light source.

[0053] The diffusion layer 1 can be provided as a diffusion plate, which is an appearance part and has the functions of a diffusion layer and an appearance layer. The diffusion layer 1 is arranged directly outside, can adopt a peripheral screen printing structure, and replaces the structure of using an aluminum alloy frame around the diffusion plate of the prior art, thereby reducing material cost and manual assembly cost.

[0054] The light guide layer 2 is used for emitting light. The wire harness 3 can be welded with the LED light bar 4. The wire harness 3, the LED light bar 4 and the light guide layer 2 are placed in the frame structure of the air duct injection molding part 5. The air duct injection molding part 5 is provided with a point gluing groove 501 at the edge, and the point gluing groove 501 can be provided in multiple and uniformly distributed at the periphery of the air duct injection molding part 5. The point gluing machine can be used to glue in multiple point gluing grooves 501 at the periphery of the air duct injection molding part 5, and then the diffusion layer 1 is placed on the air duct injection molding part 5 and is pressed to make the diffusion layer 1 and the air duct injection molding part 5 edge fit and connect; finally, the threading groove 502 is sealed with sealant.

[0055] As shown in Figure 1 , Figure 5 and Figure 8 , in some embodiments, the refrigerator air duct composite surface light source further comprises a reflection layer 6, which is arranged between the light guide layer 2 and the air duct injection molding part 5, that is, the reflection layer 6 is arranged on the back of the light guide layer 2, and the reflection layer 6 and the light guide layer 2 can be placed in the frame structure of the air duct injection molding part 5 in turn. According to the actual use condition, the reflection layer 6 can also be omitted.

[0056] The diffusion layer 1, the light guide layer 2, the reflection layer 6 and the LED light bar 4 are all arranged in a rectangular shape, and the air duct injection molding part 5 is arranged in a rectangular frame.

[0057] As shown in Figure 8 , in some embodiments, a gap 7 is arranged between the light guide layer 2 and the diffusion layer 1 to avoid the occurrence of poor light emission. The wire harness 3 and the LED light bar and the light guide layer 2 can be fixed in the air duct injection molding part 5, that is, the air duct injection molding part 5 can be provided with a fixing structure such as a clamping groove.

[0058] The light guide layer 2 is fixedly connected to the air duct injection molding part 5 through the fixing structure, which is beneficial to fixing the light guide layer 2, forming a gap 7 between the light guide layer 2 and the diffusion layer 1, and avoiding the occurrence of poor light emission.

[0059] The thickness of the light guide layer 2 can be 1.8-2.5mm.

[0060] The LED light bar 4 is fixedly connected to the air duct injection molding part 5 through the fixing structure, which is beneficial to ensuring that the LED light bar 4 remains in the correct position in the air duct injection molding part 5, aligning the LED light bar 4 with the light guide layer 2, and ensuring normal light emission effect. The LED light bar 4 can be aligned with the edge side wall of the light guide layer 2.

[0061] As shown in Figure 9 , in some embodiments, the point gluing groove 501 is a semicylindrical groove, which is beneficial to the guidance of the point gluing machine.

[0062] The two sides of the glue dispensing groove 501 are respectively provided with anti-glue overflow bosses 503, which are beneficial to form a glue containing space between the air duct injection molding part 5 and the diffusion layer 1, beneficial to contain the glue layer, and avoid glue overflow when the diffusion layer 1 is pressed with the air duct injection molding part 5.

[0063] When the glue dispensing groove 501 is a semi-cylindrical groove, the sidewalls on both sides of the opening thereof extend outwardly into planes, and the anti-glue overflow bosses 503 are respectively arranged on the planes on both sides, which can be symmetrically arranged. The anti-glue overflow bosses 503 can be rectangular block-shaped protrusions. A gap distance is arranged between the anti-glue overflow bosses 503 and the glue dispensing groove 501, which is beneficial to contain the glue layer and avoid glue overflow.

[0064] As shown in Figure 10 In some embodiments, the LED light bar 4 connected on the wire harness 3 is provided as at least two and is uniformly distributed.

[0065] In order to reduce the transverse deformation of the LED light bar 4 when the patch and the sub-plate thereof are pasted, and to ensure that the lamp beads thereof are aligned with the light guide layer 2, the PCB board of the LED light bar 4 can be provided with a relatively wide width according to actual conditions, so as to stably fix the LED light bar 4 and facilitate alignment with the light guide layer 2.

[0066] The threading groove 502 can be provided as an elliptical groove.

[0067] Embodiment 2

[0068] Please refer to Figure 11 A manufacturing method of a refrigerator air duct composite surface light source, comprising the following steps:

[0069] Step S1, screen printing of the diffusion layer 1: forming a frame on the surface of the diffusion layer 1 by screen printing;

[0070] Step S2, connecting the LED light bar 4 on the wire harness 3: connecting the LED light bar 4 on the wire harness 3;

[0071] Step S3, setting the glue dispensing groove 501 and the threading groove 502 of the air duct injection molding part 5: setting the air duct injection molding part 5 as a frame structure, and setting the glue dispensing groove 501 and the threading groove 502 at the edge of the air duct injection molding part 5;

[0072] Step S4, setting the wire harness 3, the LED light bar 4 and the light guide layer 2 in the air duct injection molding part 5: sequentially setting the wire harness 3, the LED light bar 4 and the light guide layer 2 in the air duct injection molding part 5, and aligning the LED light bar 4 with the light guide layer 2;

[0073] Step S5, gluing and pressing the diffusion layer 1 and the air duct injection molding part 5: setting a glue layer in the glue dispensing groove 501, and pressing and connecting the diffusion layer 1 and the air duct injection molding part 5 through the glue layer;

[0074] Step S6, sealing the threading groove 502: the end of the wire harness 3 is threaded into the threading groove 502, and sealing glue is arranged in the threading groove 502.

[0075] The manufacturing method of the refrigerator air duct composite surface light source of the embodiment can reduce and simplify the process, save labor cost, facilitate automatic assembly by using a mechanical hand, and greatly improve production efficiency.

[0076] The above is only an embodiment of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the scope of claims of the present application.

Claims

1. A composite surface light source for a refrigerator air duct, characterized in that, include: Diffusion layer, with a border formed by screen printing on the surface; Light guide layer; Wiring harness with connected LED light strips; The air duct injection molded part is configured as a frame structure, with a glue groove and a wire guide groove at its edge; the wire harness, the LED light strip, and the light guide layer are disposed within the air duct injection molded part, with the LED light strip facing the light guide layer; an adhesive layer is disposed within the glue groove, and the diffusion layer is pressed and connected to the air duct injection molded part through the adhesive layer; the end of the wire harness passes through the wire guide groove, and a sealant is disposed within the wire guide groove; A gap is provided between the light guide layer and the diffusion layer; The dispensing groove is a semi-cylindrical groove, with its two side walls extending outward to form a plane at the opening, and anti-overflow protrusions provided on the two side planes respectively. The number of dispensing grooves is at least two, and they are evenly distributed at the edge of the air duct injection molded part.

2. The refrigerator air duct composite surface light source according to claim 1, characterized in that, It also includes a reflective layer disposed between the light guide layer and the air duct injection molded part.

3. The refrigerator air duct composite surface light source according to claim 2, characterized in that, The diffusion layer, the light guide layer, the reflective layer, and the LED light strip are all rectangular, and the air duct injection molded part is a rectangular frame.

4. The refrigerator air duct composite surface light source according to claim 1, characterized in that, The wiring harness, the LED light strip, and the light guide layer are fixed inside the air duct injection molded part.

5. The refrigerator air duct composite surface light source according to claim 1, characterized in that, The LED light strips connected to the wiring harness are configured to be at least two and evenly distributed.

6. A method for manufacturing a composite surface light source for a refrigerator air duct, characterized in that, The method for manufacturing a composite surface light source for a refrigerator air duct as described in any one of claims 1-5 includes the following steps: Step S1, screen printing of the diffusion layer: forming a border on the surface of the diffusion layer by screen printing; Step S2: Connect the LED light strip to the wiring harness; Step S3: The air duct injection molded part is provided with a dispensing groove and a wire threading groove: The air duct injection molded part is set as a frame structure, and a dispensing groove and a wire threading groove are provided at the edge of the air duct injection molded part; Step S4: The wire harness, the LED light strip, and the light guide layer are installed inside the air duct injection molded part: The wire harness, the LED light strip, and the light guide layer are sequentially installed inside the air duct injection molded part, and the LED light strip is positioned facing the light guide layer. Step S5: Adhesive bonding and pressing of the diffusion layer and the air duct injection molded part: The adhesive layer is placed in the dispensing groove, and the diffusion layer and the air duct injection molded part are bonded together by pressing the adhesive layer; Step S6: Seal the wire pass-through groove: Insert the end of the wire harness into the wire pass-through groove and apply sealant to the wire pass-through groove.

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