A push-and-pull type hanging film structure for a double-layer heat-insulating cabinet door

Abstract

The present invention discloses a push - type suspended film structure for a double - layer heat - insulating cabinet door. The push - type suspended film structure is installed in the interlayer of the double - layer glass that constitutes the cabinet door. The push - type suspended film structure includes: an upper film frame, a lower film frame, an optically transparent film, and a lying spring assembly; the upper film frame and the lower film frame are assembled together to enclose a lying spring assembly installation cavity, the lying spring assembly is installed in the lying spring assembly installation cavity, the lying spring assembly includes an L - shaped telescopic plate and a plurality of horizontally placed springs, the L - shaped telescopic plate includes a vertical plate and a horizontal plate that are perpendicular to each other, one end of the spring abuts against the inner side of the vertical plate, and the other end abuts against the lower mold frame, and the optically transparent film is bonded to the L - shaped telescopic plate after passing through the gap reserved inside the lying spring assembly installation cavity. By the above method, using the present invention can improve the heat - insulating effect of the cabinet door while minimizing the influence on the center of gravity of the cabinet body and reducing the risk of tilting.

Description

Technical Field

[0001] The present invention relates to the field of thermal insulation equipment, and particularly to a push-and-pull hanging film structure for a double-layer thermal insulation cabinet door. Background Art

[0002] Refrigerated display cabinets are special facilities used to display products that need to be stored at low temperatures in different environments such as shopping malls, supermarkets, and exhibitions. Since the storage conditions of the displayed products are relatively harsh, refrigerated display cabinets need to have better thermal insulation capabilities than ordinary cabinets. To improve the thermal insulation capabilities, some existing refrigerated display cabinets generally use double-layer hollow glass to make the cabinet doors. However, when the external temperature difference is large, there is still a possibility of air convection heat conduction between the double-layer hollow glass. To solve this problem and further improve the heat insulation effect of the cabinet door, some manufacturers have started to use multi-layer hollow glass to further limit the internal air convection. However, this approach not only increases the cost significantly but also increases the weight of the entire door body due to the increase in the amount of glass used. To maximize the display space, some vertical display cabinets are relatively tall and the display surface is continuously enlarged. In this case, the overall weight of the multi-layer cabinet doors will be relatively heavy, resulting in the center of gravity of the display cabinet being shifted forward. When opening the cabinet door to pick up items, due to the outward shift of the center of gravity of the door body, there is a risk of tipping over. In fact, there have been multiple such tipping accidents in recent years, and there have also been reports of children being injured. Summary of the Invention

[0003] The main technical problem to be solved by the present invention is to provide a push-and-pull hanging film structure that can improve the thermal insulation effect of the display cabinet door while reducing the total weight of the door body and the cabinet body.

[0004] To solve the above technical problem, one technical solution adopted by the present invention is: to provide a push-and-pull hanging film structure for a double-layer glass thermal insulation cabinet door, the push-and-pull hanging film structure is installed in the interlayer of the double-layer glass that forms the cabinet door, and is characterized in that the push-and-pull hanging film structure includes: an upper film frame, a lower film frame, an optically transparent film, and a lying spring assembly; the upper film frame and the lower film frame are assembled together to enclose a lying spring assembly installation cavity, the lying spring assembly is installed in the lying spring assembly installation cavity, the lying spring assembly includes an L-shaped telescopic plate and a plurality of horizontally placed springs, the L-shaped telescopic plate includes a vertical plate and a horizontal plate that are perpendicular to each other, one end of the spring abuts against the inner side of the vertical plate, and the other end abuts against the lower mold frame, and the optically transparent film passes through the gap reserved inside the lying spring assembly installation cavity and is adhered to the L-shaped telescopic plate.

[0005] In a preferred embodiment of the present invention, the upper film frame includes a pressing frame and a positioning plate. The pressing frame includes an upper frame plate and an upper pressing plate. A buffer cavity is provided between the upper frame plate and the upper pressing plate, and a desiccant is filled in the buffer cavity. The positioning plate is located outside the pressing frame and is perpendicular to the pressing frame. A tenon strip is provided at the top of the positioning plate. The lower film frame includes an inner groove plate, an outer groove plate, a bottom frame plate, and a spring baffle. The outer side of the inner groove plate and the inner side of the outer groove plate together define a mortise groove that matches the tenon strip. The inner groove plate and the outer groove plate are both located outside the bottom frame plate and are perpendicular to the bottom frame plate. The spring baffle is located inside the bottom frame plate and is perpendicular to the bottom frame plate. During assembly, the tenon strip is snapped into the mortise groove, and a cavity for installing the flat spring assembly is defined by the upper pressing plate, the positioning plate, the inner groove plate, the bottom frame plate, and the spring baffle. A gap for the optical transparent film to pass through is reserved between the bottom of the pressing frame and the spring baffle.

[0006] A spring end groove is provided on the inner side of the vertical plate of the L-shaped telescopic plate, and a spring tail groove is provided on the spring baffle of the lower film frame. The assembly heights of the spring end groove and the spring tail groove are on the same horizontal line. A spring upper guard plate is provided along the upper edge of the spring tail groove, and a spring lower guard plate is provided along the lower edge of the spring end groove.

[0007] The length of the horizontal plate is greater than the vertical distance from the end of the spring upper guard plate to the inner side of the inner groove plate. After assembly, one end of the horizontal plate overlaps the spring upper guard plate, and the minimum overlapping width between the horizontal plate and the spring upper guard plate is not less than 1 / 2 of the width of the spring upper guard plate. The thickness of the horizontal plate is less than the distance between the spring upper guard plate and the upper pressing plate after assembly.

[0008] The height of the vertical plate is equal to the straight-line distance from the spring upper guard plate to the inner side of the bottom frame plate. The lengths of the spring upper guard plate and the spring lower guard plate do not exceed the minimum length after the spring is compressed to its limit.

[0009] Further, an arc-shaped pressing strip is provided on the inner side of the upper pressing plate. After assembly, the arc-shaped pressing strip is outside the moving range of the horizontal plate of the L-shaped telescopic plate, and the angle between the optical transparent film and the plate surface of the upper pressing plate after being pressed by the arc-shaped pressing strip is 5-10°.

[0010] Further, reinforcing ribs are provided in the buffer cavity, dividing the buffer cavity into a first buffer cavity and a second buffer cavity. Both the first buffer cavity and the second buffer cavity are filled with desiccant during assembly.

[0011] In a preferred embodiment of the present invention, the L-shaped telescopic plate is made of a metal material or a rigid polymer material.

[0012] In a preferred embodiment of the present invention, the upper film frame and the lower film frame are extruded and formed from a polymer material.

[0013] The beneficial effects of the present invention are as follows: the present invention can effectively reduce interlayer convective heat exchange by adding a layer of taut optically transparent film in the double-layer glass cabinet door, thereby improving the thermal insulation effect of the cabinet door and having almost negligible impact on the weight of the cabinet door, thereby meeting the thermal insulation requirements of the refrigerated display cabinet while reducing the safety hazards caused by the high and heavy cabinet body. When the optically transparent film is installed, the horizontal spring assembly installed in the upper film frame and the lower film frame can remain taut for a long time after tensioning, and will automatically adapt to changes in the tension of the membrane surface. The membrane surface will not relax due to material aging, yielding, or thermal expansion and contraction causing tension changes, thereby increasing the service life of the suspended film. Compared with other forms, the product has balanced tension and better membrane surface flatness. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of a preferred embodiment of the present invention;

[0015] Figure 2 is a schematic structural diagram of the upper film frame in the illustrated embodiment;

[0016] Figure 3 is a schematic structural diagram of the lower membrane frame in the illustrated embodiment;

[0017] Figure 4 is a schematic diagram of the structure of the L-shaped telescopic plate in the illustrated embodiment;

[0018] The markings of the components in the accompanying drawings are as follows:

[0019] 1. Optically transparent film, 2. Upper film frame, 3. Lower film frame, 4. L-shaped telescopic plate, 5. Spring;

[0020] 201. Upper frame plate, 202. Upper pressure plate, 203. First buffer chamber, 204. Second buffer chamber, 205.

[0021] Arc surface pressure strip, 206. Positioning plate, 207. Tenon strip, 208. Reinforcement rib;

[0022] 301. Bottom frame plate, 302. Spring baffle, 303. Outer groove plate, 304. Inner groove plate, 305. Spring

[0023] Tail slot, 306. Spring upper guard plate;

[0024] 401. Horizontal plate, 402. Vertical plate, 403. Spring lower guard plate, 404. Spring end groove. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0026] Please refer to Figures 1 to 4 , the embodiments of the present invention include:

[0027] A push - type hanging film structure for a double - layer heat - insulating cabinet door. The push - type hanging film structure is installed in the interlayer of the double - layer glass that composes the cabinet door. The push - type hanging film structure includes: an upper film frame 2, a lower film frame 3, an optically transparent film 1, and a lying spring assembly. Both the upper film frame 2 and the lower film frame 3 are extruded from filled polymer materials. In actual production, PVC filled with glass fiber or polyurethane filled with glass fiber is generally used for extrusion. Because the overall density of the above - mentioned polymer materials is light, the strength is high, and the thermal conductivity coefficient is low, the impact on the overall weight of the cabinet door is small.

[0028] The upper film frame 2 includes a pressing frame and a positioning plate 206. The pressing frame includes an upper frame plate 201 and an upper pressing plate 202. A buffer cavity is provided between the upper frame plate 201 and the upper pressing plate 202. Reinforcing ribs 208 are provided in the buffer cavity, dividing the buffer cavity into a first buffer cavity 203 and a second buffer cavity 204. Both the first buffer cavity 203 and the second buffer cavity 204 are drying cavities filled with desiccants, which can absorb the moisture inside the door panel to prevent condensation from occurring on the inner side of the cabinet door, extend the service life of the entire hanging film structure, and prevent visual problems with the display cabinet door.

[0029] The positioning plate 206 is located outside the pressing frame and is perpendicular to the pressing frame. A tenon strip 207 is provided at the top of the positioning plate 206. The lower film frame 3 includes an inner groove plate 304, an outer groove plate 303, a bottom frame plate 301, and a spring baffle 302. The outer side of the inner groove plate 304 and the inner side of the outer groove plate 303 together enclose a mortise groove that matches the tenon strip 207. Both the inner groove plate 304 and the outer groove plate 303 are located outside the bottom frame plate 301 and are perpendicular to the bottom frame plate 301. The spring baffle 302 is located inside the bottom frame plate 301 and is perpendicular to the bottom frame plate 301. When the upper film frame 2 and the lower film frame 3 are assembled, the tenon strip 207 is inserted into the mortise groove to form a stable tenon - mortise connection structure. In this way, the lying spring assembly installation cavity surrounded by the upper pressing plate 202, the positioning plate 206, the inner groove plate 304, the bottom frame plate 301, and the spring baffle 302 is formed, and a gap for the optically transparent film 1 to pass through is reserved between the bottom of the pressing frame and the spring baffle 302.

[0030] The lying spring assembly is installed in the lying spring assembly installation cavity and includes an L-shaped telescopic plate 4 and several horizontally placed wire springs 5. The L-shaped telescopic plate 4 is made of metal or hard polymer material. In actual production, aluminum alloy or glass fiber-reinforced polyurethane is generally used for extrusion molding because these two materials are relatively light and have high strength. Since continuous force is required during use, the strength requirement for the plate body is relatively high. Otherwise, it is prone to deformation during the use period, resulting in the relaxation of the film surface of the hanging film and reducing the heat preservation and visual effects. It includes a vertical plate 402 and a horizontal plate 401 that are perpendicular to each other. A spring end groove 404 is provided inside the vertical plate 402, and a spring tail groove 305 is provided on the spring baffle 302. The assembly height of the spring end groove 404 and the spring tail groove 305 is on the same horizontal line. A spring is installed between each pair of spring end grooves 404 and spring tail grooves 306. When installed, one end of the spring 5 abuts against the spring end groove 404 inside the vertical plate 402, and the other end abuts against the spring tail groove 305 on the spring baffle 302, and the distance between adjacent springs 5 is equal, generally 3-6 cm, which is set according to actual needs. The optical transparent film 3 passes through the gap reserved inside the lying spring assembly installation cavity, that is, the gap between the top of the spring baffle 302 and the upper pressing plate 202, and is then bonded to the L-shaped telescopic plate 4.

[0031] In this way, after the actual installation is completed, the spring 5 can horizontally push the L-shaped telescopic plate 4 to extend outwards, so that the optical transparent film 3 is always kept in a tensioned state. Moreover, through the relatively arranged spring end grooves 404 and spring tail grooves 305, the installed spring 5 can always maintain a stable horizontal state during operation and will not be tilted due to the telescopic process, affecting the uniform stress on the edge after the optical transparent film is tightened.

[0032] The upper edge of the spring tail groove 305 is provided with a spring upper guard plate 306, and the lower edge of the spring end groove 404 is provided with a spring lower guard plate 403. The length of the cross plate 401 is greater than the vertical distance from the end of the spring upper guard plate 306 to the inner side of the inner groove plate 304. In this way, after assembly, one end of the cross plate of the L-shaped telescopic plate will overlap on the spring upper guard plate. When the spring is stretched to the limit, the overlapping width is the smallest. At this time, the overlapping width should be controlled to be not less than 1 / 2 of the width of the spring upper guard plate to ensure the stability of the L-shaped telescopic plate 4 during telescoping. In actual implementation, the limit overlapping width is generally the same as the width of the spring upper guard plate 306, so the stability is better. The thickness of the cross plate 401 is less than the distance between the spring upper guard plate 306 and the upper pressure plate 202 after assembly, forming a gap. In actual assembly, the width of this gap is generally controlled to be 1-2 mm. The height of the vertical plate 402 is equal to the straight-line distance from the spring upper guard plate 404 to the inner side of the bottom frame plate 301. In this way, it can be ensured that in actual use, the L-shaped telescopic plate 4 can slide horizontally relying on the inner surfaces of the spring upper guard plate 306 and the bottom frame plate 301, and the film surface will not rub against the upper pressure plate 202 to generate interference after the film surface is bonded. The spring upper guard plate 306 and the spring lower guard plate 403 are provided to prevent the spring body from being distorted during the telescoping process of the spring 5. The lengths of the spring upper guard plate 306 and the spring lower guard plate 403 do not exceed the minimum length after the spring 5 is compressed to the limit. In this way, enough space can be left when the spring 5 expands and contracts back and forth to prevent the ends of the spring upper guard plate 306 and the spring lower guard plate 403 from touching the inner wall of the installation cavity of the lying spring assembly. In actual use, the non-loaded length of the spring 5 is generally 12 mm, and its limit compression length is 6 mm. Therefore, the length of the spring upper guard plate 306 is generally 3 mm, and the length of the spring lower guard plate 403 is generally 4 mm. In this way, enough compression margin can be left for the spring 5.

[0033] An arc-shaped pressing strip 205 is provided inside the upper pressure plate 202, so that after assembly, the arc-shaped pressing strip is outside the sliding range of the L-shaped telescopic plate, preventing the L-shaped telescopic plate from touching the arc-shaped pressing strip when moving, and controlling the height and position of the arc-shaped pressing head 205 so that the included angle between the optical transparent film 3 and the plate surface of the upper pressure plate 202 is between 5° and 10° after being pressed by the arc-shaped pressing strip 205. In actual implementation, the arc-shaped pressing strip 205 is generally arranged at the innermost edge of the upper pressure plate 202, away from the L-shaped telescopic plate 4. On the one hand, it can prevent touching the L-shaped telescopic plate 4, and on the other hand, it can further tighten the tensioned optical transparent film 3, and reduce the influence of the natural upward warping of the end of the L-shaped telescopic plate 4 during tensioning, so that the tensioned surface remains flat and does not generate too much stress on the pressing position, damaging the film surface.

[0034] The assembly method of the present invention in actual use is as follows:

[0035] First step, bond the lower film frame 3 to the inner side of one layer of the double-layer glass cabinet door and cure it.

[0036] Second step, first insert the ends of all the wire springs 5 into the spring end slots 404 of the L-shaped telescopic plate 4 according to the set value of the equal division distance, and then insert the tails of all the springs 5 into the spring tail slots 305 to complete the installation of the lying spring assembly.

[0037] Third step, first quickly bond one side of the optical transparent film 3 to the L-shaped telescopic plate 4 on the same side of the lower film frame 3. The bonding surface includes the entire outer contour surface of the L-shaped telescopic plate 4. Then tighten the optical transparent film 3, and under the tightened condition, bond the other side of the optical transparent film 3 to the L-shaped telescopic plate 4 on the other side of the lower film frame 3 as well and cure it. After curing, loosen it, and the optical transparent film automatically becomes taut.

[0038] Fourth step, press the upper film frame 2 on the lower mold frame 3 so that the tenon strips just snap into the mortise slots. At this time, the arc-shaped pressing strip just presses on the arc-shaped pressing strip 205, further tightening the film surface and making the flatness of the centrally extended film surface higher. Then apply a sealing adhesive on the plate surface of the upper frame plate 201, bond another layer of glass to the upper film frame 2, and finally apply an airtight sealant between the two layers of glass to enclose the entire lying-push type suspended film mechanism.

[0039] In this way, it is possible to further reduce the AC heat exchange capacity in the hollow layer of the glass cabinet door without increasing the weight of the cabinet door, effectively improving the heat preservation effect of the cabinet door. Moreover, the entire suspended film mechanism has a good continuous tensioning effect, which can better eliminate the influence of the ambient temperature on the film surface curvature, extend the service life of the film surface longer, and the overall force is balanced when tightened, and the flatness of the film surface is higher.

[0040] The above are only embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A push - type hanging film structure for the inside of a double - layer heat - insulating cabinet door, the push - type hanging film structure is installed in the interlayer of the double - layer glass that constitutes the cabinet door, and is characterized in that, The bench press type suspended film structure includes: an upper film frame, a lower film frame, an optically transparent film, and a lying spring assembly; the upper film frame and the lower film frame are extruded from a polymer material, the upper film frame and the lower film frame are assembled together to enclose a lying spring assembly installation cavity, the lying spring assembly is installed in the lying spring assembly installation cavity, the lying spring assembly includes an L-shaped telescopic plate and a plurality of horizontally placed springs, the L-shaped telescopic plate is made of a metal material or a rigid polymer material, the L-shaped telescopic plate includes a vertical plate and a horizontal plate that are perpendicular to each other, one end of the spring abuts against the inner side of the vertical plate, and the other end abuts against the lower mold frame, and the optically transparent film passes through a gap reserved inside the lying spring assembly installation cavity and is bonded to the L-shaped telescopic plate; The upper film frame includes a pressing frame and a positioning plate, the pressing frame includes an upper frame plate and an upper pressing plate, a buffer cavity is provided between the upper frame plate and the upper pressing plate, a desiccant is filled in the buffer cavity, the positioning plate is located outside the pressing frame and is perpendicular to the pressing frame, a tenon strip is provided at the top of the positioning plate, the lower film frame includes an inner groove plate, an outer groove plate, a bottom frame plate, and a spring baffle, the outer side of the inner groove plate and the inner side of the outer groove plate together enclose a mortise groove that matches the tenon strip, the inner groove plate and the outer groove plate are both located outside the bottom frame plate and are perpendicular to the bottom frame plate, the spring baffle is located inside the bottom frame plate and is perpendicular to the bottom frame plate, during assembly, the tenon strip is inserted into the mortise groove, and the upper pressing plate, the positioning plate, and the inner groove plate, the bottom frame plate, and the spring baffle together enclose a lying spring assembly installation cavity, and a gap for the optically transparent film to pass through is reserved between the bottom of the pressing frame and the spring baffle.

2. The push-type hanging film structure for the double-layer heat-insulating cabinet door according to claim 1, characterized in that A spring end groove is provided on the inner side of the vertical plate of the L-shaped telescopic plate, a spring tail groove is provided on the spring baffle of the lower film frame, the assembly height of the spring end groove and the spring tail groove is on the same horizontal line, a spring upper guard plate is provided on the upper edge of the spring tail groove, and a spring lower guard plate is provided on the lower edge of the spring end groove.

3. The push-type hanging film structure for the double-layer heat-insulating cabinet door according to claim 2, wherein, The length of the horizontal plate is greater than the vertical distance from the end of the spring upper guard plate to the inner side of the inner groove plate. After assembly, one end of the horizontal plate overlaps on the spring upper guard plate, and the minimum overlapping width of the horizontal plate and the spring upper guard plate is not less than 1 / 2 of the width of the spring upper guard plate, and the thickness of the horizontal plate is less than the distance between the spring upper guard plate and the upper pressing plate after assembly.

4. The push-type hanging film structure for the double-layer heat-insulating cabinet door according to claim 2, wherein, The height of the vertical plate is equal to the straight-line distance from the spring upper guard plate to the inner side of the bottom frame plate.

5. The push-type hanging film structure for the double-layer heat-insulating cabinet door according to claim 2, characterized in that, The lengths of the spring upper guard plate and the spring lower guard plate do not exceed the minimum length after the spring is compressed to the limit.

6. The push-type hanging film structure for the double-layer heat-insulating cabinet door according to claim 2, characterized in that, An arc-shaped pressing strip is provided on the inner side of the upper pressing plate. After assembly, the arc-shaped pressing strip is located outside the moving range of the horizontal plate of the L-shaped telescopic plate, and the angle between the optically transparent film and the plate surface of the upper pressing plate after being pressed by the arc-shaped pressing strip is 5-10°.

7. The push-type hanging film structure for the double-layer heat-insulating cabinet door according to claim 1, wherein Reinforcing ribs are provided in the buffer cavity, the reinforcing ribs divide the buffer cavity into a first buffer cavity and a second buffer cavity, and desiccants are filled in both the first buffer cavity and the second buffer cavity during assembly.

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