Temperature difference stress-resistant glass door structure of red wine cabinet and stress regulation method thereof

Abstract

The present application relates to the technical field of wine cabinet, in particular to a temperature difference stress resistant wine cabinet glass door structure and a stress regulation method thereof. The wine cabinet glass door structure comprises a glass door body, a door frame, a flexible connection assembly arranged between the door body and the door frame, and a partition electric heating stress regulation assembly. Through the synergistic effect of the composite interlayer heat stress dispersion, the flexible connection expansion constraint release, and the active heating temperature gradient reduction, the system inhibits the thermal stress concentration under a large temperature difference of 4055 DEG C, effectively prevents glass thermal burst, edge cracking and door body bending deformation, and significantly improves the safety and service life. In addition, the stress regulation method of the present application refers to the above-mentioned wine cabinet glass door structure.

Description

Technical Field

[0001] This invention relates to the field of wine cabinet technology, specifically to a glass door structure for a wine cabinet that is resistant to temperature difference stress and a method for stress control thereon. Background Technology

[0002] Wine cabinets are specialized devices for temperature-controlled wine storage. Their glass doors must simultaneously meet the requirements of light transmission for display, heat insulation, and structural safety. In actual use, wine cabinets experience significant temperature differences between the inside and outside. On one hand, the interior of the cabinet needs to maintain a low and stable storage temperature (typically 5℃~22℃); on the other hand, the external ambient temperature is affected by the season, the location of use, and heat sources. In summer or winter, under heating conditions, it can reach 30℃~40℃. If placed in direct sunlight or near a heat source, the localized temperature of the glass door's outer surface can be even higher. This results in temperature differences of 40℃~55℃ between the inner and outer surfaces of the glass door, or between different areas of the glass door.

[0003] Because glass has a low thermal conductivity and is a poor conductor of heat, when there is a significant temperature difference between the two sides or different areas of a glass door, the high-temperature area expands more rapidly and the low-temperature area expands less. This uneven thermal expansion, constrained by the overall continuity of the glass, inevitably generates thermal stress within the glass. In typical operating conditions for a wine cabinet, the central area of ​​the glass door heats up faster, while the edge areas, due to being embedded in the door frame, experiencing heat dissipation from the frame, and the thermal resistance of the sealing material, experience a slower temperature change, creating a temperature gradient between the center and the edge. Simultaneously, the temperature difference between the inner and outer surfaces of the glass door also generates thermal stress in the thickness direction.

[0004] Despite the use of double-glazed glass or other passive insulation measures in existing wine cabinet products, problems such as thermal cracking, edge sealing material cracking, or door bending and deformation still frequently occur under large temperature difference conditions of 40℃ to 55℃, leading to refrigeration failure and even safety hazards.

[0005] Therefore, how to effectively suppress the thermal stress concentration of wine cabinet glass doors under large temperature difference conditions, and avoid glass thermal cracking and edge sealing failure, is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The first objective of this invention is to provide a wine cabinet glass door structure that can systematically suppress thermal stress, addressing the problems of thermal cracking, edge cracking, and door bending deformation caused by thermal stress concentration in existing wine cabinet glass doors under large temperature difference conditions of 40℃~55℃.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A wine cabinet glass door structure resistant to thermal stress includes a glass door body, a passive control structure, and an active control structure. The glass door body is composed of an outer glass layer, a middle laminated layer, and an inner glass layer stacked sequentially. The passive control structure includes a door frame surrounding the edge of the glass door body and a flexible connecting component disposed between the glass door body and the door frame. The door frame has an elastic displacement in the thickness direction of the glass door body, and the flexible connecting component provides the glass door body with a thermal expansion displacement gap relative to the door frame in the length and / or width directions. The active control structure includes a mesh transparent conductive film embedded inside the glass door body, a temperature sensor for detecting the temperature of different areas of the glass, and a controller. The mesh transparent conductive film is disposed at least in the edge area of ​​the glass door body. The controller is electrically connected to the temperature sensor and the mesh transparent conductive film, and the three form a zoned stress control component. The zoned stress control component responds to the temperature difference detected by the temperature sensor by driving the mesh transparent conductive film to selectively heat the edge area.

[0008] This invention systematically suppresses thermal stress concentration in wine cabinet glass doors under large temperature difference conditions through the synergistic effect of a composite laminated glass door body, flexible connecting components, and zoned electric heating stress control components. First, the composite laminated structure utilizes multiple interfaces to disperse thermal stress, enhancing the glass door body's resistance to thermal shock. Second, the flexible connecting components provide in-plane thermal expansion displacement gaps for the glass door body, releasing expansion constraint stress caused by temperature differences. Third, the zoned electric heating stress control components actively detect and eliminate in-plane temperature gradients, suppressing thermal stress generation at its source. Compared with existing technologies, this invention effectively prevents glass thermal cracking, edge sealing cracking, and door body bending deformation, significantly improving product safety and service life.

[0009] Preferably, the outer glass is Low. E-tempered glass, wherein the inner glass layer is homogeneous tempered glass, and the intermediate interlayer is an SGP interlayer; or, the intermediate interlayer is a PVB interlayer. In this solution, the outer Low... The low-emissivity coating of the E-tempered glass reduces heat transfer from the outside to the interior, while the tempering process increases surface compressive stress, making it more resistant to thermal shock and less prone to breakage. The inner layer of homogeneous tempered glass eliminates the risk of spontaneous breakage caused by nickel sulfide impurities, ensuring safety under long-term thermal cycling. The intermediate SGP or PVB interlayer possesses high toughness, high bonding strength, and low elastic modulus. When temperature differences cause thermal expansion variations in the glass door, the interlayer absorbs some strain energy through its own shear deformation, preventing crack propagation in the thickness direction and bonding the two layers of glass together. Even if a single layer of glass breaks accidentally, the fragments will not scatter. The synergistic effect of these three materials ensures the glass door remains within a 40°C range. Under conditions of large temperature difference of 55℃, it can resist thermal shock and buffer internal thermal stress, while maintaining high light transmittance and structural integrity.

[0010] Preferably, the door frame includes a first frame connected to the glass door and a second frame connected to the wine cabinet body; the rear end of the first frame and the front end of the second frame are connected by a spring-loaded fastening structure, which has an elastic displacement in the thickness direction of the glass door; the flexible connection assembly includes a flexible connector disposed between the first frame and the glass door, the flexible connector being arranged around the four edges of the glass door, and the flexible connector having a concave-convex mating surface that elastically abuts against the side wall of the glass door. This solution adopts a split door frame design: the first frame and the second frame are connected by a spring-loaded fastening structure, and an elastic displacement is reserved in the thickness direction. When the glass door expands or contracts in the thickness direction due to temperature difference, the spring-loaded fastening structure absorbs the displacement by compressing or releasing the elastic displacement, avoiding hard compression between the first frame and the second frame, thereby eliminating the constraint stress in the thickness direction. Meanwhile, a flexible connector is provided between the first frame and the glass door, surrounding the four edges. Its concave-convex mating surfaces elastically abut against the sidewalls of the glass door. On one hand, the concave-convex structure provides deformable space in both length and width directions, allowing the glass door to slide freely relative to the first frame during in-plane thermal expansion. On the other hand, the elasticity of the flexible connector itself stably constrains the glass door within the frame, ensuring airtightness without restricting necessary thermal displacement. The split-type door frame and the flexible connector work together to achieve elastic compression in the thickness direction and sliding release in the in-plane direction, systematically relieving the thermal expansion constraints on the glass door in three directions. This effectively prevents stress concentration caused by rigid installation, thus avoiding thermal cracking of the glass or bending deformation of the door.

[0011] Preferably, the flexible connection component includes an elastic support block, and the spring-loaded fastening structure includes a buckle and a slot disposed between the rear end of the first frame and the front end of the second frame. The elastic support block is compressedly disposed between the buckle and the slot. In this solution, the elastic support block is compressedly disposed between the buckle and the slot, enabling the spring-loaded fastening structure to have adaptive compression and rebound capability in the thickness direction of the glass door: during thermal expansion, the elastic support block is further compressed to absorb displacement, and during cold contraction, it rebounds and resets, thereby eliminating thermal stress concentration in the thickness direction and maintaining connection stability.

[0012] Preferably, the concave-convex mating surface is a trapezoidal groove surface that extends continuously along the side wall of the glass door. In this design, the sloping side wall of the trapezoidal groove provides clear displacement guidance for the glass side wall, preventing deflection or jamming during thermal expansion; its larger planar contact area allows for a more uniform distribution of elastic abutment force, avoiding local stress concentration and crushing failure; the trapezoidal structure has strong creep resistance and can maintain a stable geometric shape and buffer gap under long-term temperature difference cycling, while the crests of wavy surfaces are easily flattened, leading to functional degradation; in addition, the trapezoidal groove surface is easy to achieve high-precision, high-consistency continuous molding through extrusion or molding, with uniform fit throughout and a continuous and reliable sealing path. Therefore, the trapezoidal groove surface is superior to the wavy surface in terms of directional guidance, stress uniformity, long-term fatigue life, and processing consistency.

[0013] Alternatively, the concave-convex mating surface is a wavy curved surface that extends continuously along the side wall of the glass door.

[0014] Preferably, the controller has a preset start-up temperature difference value and a preset stop-down temperature difference value. In this solution, edge heating is activated when the detected temperature difference reaches the start-up value to actively eliminate the temperature gradient; heating stops when the temperature difference drops to the stop-down value, avoiding overheating and frequent start-stop cycles, and achieving stable and energy-saving temperature difference control.

[0015] Preferably, the flexible connection assembly further includes an elastic buffer block, the second frame is located on the rear side of the first frame and the glass door, and there is a gap between the second frame and the rear side of the glass door, the elastic buffer block is sandwiched between the second frame and the rear side of the glass door, and the elastic buffer block has a preset compressible stroke along the thickness direction of the glass door.

[0016] Preferably, the outer glass layer and the intermediate interlayer have a predetermined gap to form a hollow layer; it also includes a warm edge sealing strip, which is set along the edge of the hollow layer; the warm edge sealing strip includes a three-layer composite structure of a stainless steel spacer, a butyl rubber layer, and a silicone rubber layer. In this solution, the warm edge sealing strip is located at a critical position of cold bridge at the edge of the glass door. Through the three-layer composite of stainless steel spacer (low thermal conductivity), butyl rubber (airtight seal), and silicone rubber (elastic adhesion), the linear heat transfer coefficient at the edge is significantly reduced, blocking the direct heat conduction between the outer glass layer and the mesh transparent conductive film, thereby reducing the temperature gradient between the glass edge and the central area. At the same time, the outer periphery of the warm edge sealing strip is connected to the first frame through a flexible connector, integrating the heat insulation function and the flexible buffer function: on the one hand, the elasticity of the flexible connector absorbs thermal expansion displacement, and on the other hand, it prevents the heat of the door frame from being directly transferred to the glass edge. This structure, from the perspective of passive heat insulation, works in conjunction with active electric heating to further suppress the concentration of temperature difference stress.

[0017] Preferably, the system also includes a fiber Bragg grating sensor, which is disposed between the adhesive layer and the door frame and connected to the controller via an optical fiber. The controller has a preset stress threshold and is used to send a warning signal via a wireless communication module when the detected stress exceeds the threshold. In this solution, the fiber Bragg grating sensor is disposed between the adhesive layer and the door frame, close to the stress source, resulting in fast response and high sensitivity. Furthermore, its location is concealed, does not damage the appearance or seal, has strong anti-interference capabilities, and ensures stable long-term operation.

[0018] Another objective of this invention is to provide a stress control method based on the glass door structure of a wine cabinet described above. The method includes the following steps: acquiring the temperature difference between the central and edge regions of the glass door; comparing the temperature difference with a preset activation threshold; when the temperature difference is greater than or equal to the preset activation threshold, controlling a mesh-like transparent conductive film embedded inside the glass door to heat the edge region of the glass door, and continuously acquiring the temperature difference during the heating process; stopping heating when the temperature difference is less than or equal to a preset shutdown threshold; and real-time detecting the stress value of the sealing area using a fiber optic grating sensor located at the edge of the glass door; when the stress value exceeds a preset stress threshold, pushing a warning signal outward via a wireless communication module. Because this invention utilizes the glass door structure described above, it possesses all the advantages of the aforementioned solution. First, a temperature sensor monitors the temperature difference between the center and edge of the glass door in real time. When the temperature difference reaches a preset threshold, the controller activates the mesh-like transparent conductive film in the edge area for selective heating, actively reducing the in-plane temperature gradient. Heating stops once the temperature difference drops to a shutdown threshold, thus preventing the continuous accumulation of thermal stress. Simultaneously, a fiber optic grating sensor embedded in the edge of the glass door continuously senses stress changes in the sealing area. When the stress exceeds a preset safety threshold, the controller sends a warning signal via wireless communication to alert the user. This method combines active temperature difference regulation with passive stress monitoring: on the one hand, it eliminates the temperature gradient that generates thermal stress at its source; on the other hand, it provides real-time warnings for stress anomalies, forming a dual protection mechanism of "active suppression + dynamic monitoring," effectively preventing glass thermal cracking and sealing failure. Attached Figure Description

[0019] Figure 1 It is an assembly drawing of the cabinet body and glass door structure; Figure 2 This is an exploded view of the glass door structure. Figure 1 .

[0020] Label Explanation: 1. Glass door body, 11. Outer glass, 12. Intermediate laminated layer, 13. Inner glass, 14. Intermediate layer, 2. Door frame, 21. First frame, 22. Second frame, 23. Spring-loaded fastening structure, 231. Buckle, 232. Slot, 31. Flexible connector, 311. Concave-convex mating surface, 32. Elastic support block, 33. Elastic buffer block, 4. Mesh transparent conductive film, 5. Warm edge sealing strip, 51. Stainless steel spacer, 52. Butyl rubber layer, 53. Silicone rubber layer, 6. Flexible magnetic door seal, 7. Cabinet body. Detailed Implementation

[0021] The technical solution of the present invention will be further described below with reference to the accompanying drawings: In the description of this invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "horizontal", "inner", and "outer" is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0022] Example 1: Referring to Figures 1-2, this invention discloses a wine cabinet glass door structure resistant to temperature difference stress, comprising a glass door body 1, a passive control structure, and an active control structure. The glass door body 1 is composed of an outer glass layer 11, a middle laminated layer 12, and an inner glass layer 13 arranged in sequence. The passive control structure includes a door frame 2 disposed around the edge of the glass door body 1, and a flexible connecting component disposed between the glass door body 1 and the door frame 2. The door frame 2 has an elastic displacement in the thickness direction of the glass door body 1, and the flexible connecting component provides the glass door body 1 with a displacement relative to the door frame 1. The frame 2 has a thermal expansion displacement gap in the length and / or width directions; the active control structure includes a mesh transparent conductive film 4 embedded inside the glass door 1, a temperature sensor for detecting the temperature of different areas of the glass, and a controller; the mesh transparent conductive film 4 is arranged at least in the edge area of ​​the glass door 1, the controller is electrically connected to the temperature sensor and the mesh transparent conductive film 4, and the three form a zoned stress control component, the zoned stress control component responds to the temperature difference detected by the temperature sensor to drive the mesh transparent conductive film 4 to selectively heat the edge area.

[0023] Preferably, the outer glass 11 is Low E-tempered glass, wherein the inner glass 13 is homogeneous tempered glass, and the intermediate interlayer 12 is an SGP interlayer; or, the intermediate interlayer 12 is a PVB interlayer. In this solution, the low-emissivity coating of the outer glass 11 reduces the transfer of external heat to the cabinet, while the tempering treatment increases the surface compressive stress of the glass, making it able to withstand greater thermal shock and less prone to breakage; the inner glass 13, through homogenization treatment, eliminates the risk of spontaneous breakage caused by nickel sulfide impurities that may exist in the tempered glass, ensuring safety under long-term thermal cycling; the intermediate interlayer 12 has high toughness, high bonding strength, and low elastic modulus. When the temperature difference causes thermal expansion differences in the glass door 1, the interlayer 12 can absorb part of the strain energy through its own shear deformation, preventing cracks from propagating in the thickness direction, and adhering the two layers of glass together, so that even if a single layer of glass breaks accidentally, the fragments will not scatter. The synergistic effect of the three materials enables the glass door 1 to withstand 40°C. Under conditions of large temperature difference of 55℃, it can resist thermal shock and buffer internal thermal stress, while maintaining high light transmittance and structural integrity.

[0024] Preferably, the door frame 2 includes a first frame 21 connected to the glass door 1 and a second frame 22 for connecting to the cabinet 7; the rear end of the first frame 21 and the front end of the second frame 22 are connected by a spring-loaded fastening structure 23, the spring-loaded fastening structure 23 having an elastic displacement in the thickness direction of the glass door 1; the flexible connection assembly includes a flexible connector 31 disposed between the first frame 21 and the glass door 1, the flexible connector 31 being arranged around the four edges of the glass door 1, and the flexible connector 31 having a concave-convex mating surface 311, the concave-convex mating surface 311 elastically abutting against the side wall of the glass door 1.

[0025] In this design, the first frame 21 and the second frame 22 are connected by a spring-loaded fastening structure 23, with a reserved amount of elastic displacement in the thickness direction. When the glass door 1 expands or contracts in the thickness direction due to temperature difference, the spring-loaded fastening structure 23 can absorb the displacement by compressing or releasing the gap, avoiding hard compression between the first frame 21 and the second frame 22, thereby eliminating the constraint stress along the thickness direction. At the same time, a flexible connector 31 is provided between the first frame 21 and the glass door 1 around the four edges. Its concave and convex mating surfaces 311 form an elastic abutment with the side wall of the glass door 1. On the one hand, the concave and convex structure provides deformable space in the length and width directions, allowing the glass door 1 to slide freely relative to the first frame 21 when it expands in the plane. On the other hand, the elasticity of the flexible connector 31 itself stably constrains the glass door 1 within the door frame 2, ensuring both airtightness and not restricting necessary thermal displacement. This structure systematically relieves the thermal expansion constraints of the glass door 1 in three directions through elastic compression in the thickness direction and sliding release in the in-plane direction, effectively preventing stress concentration caused by installation rigidity, thereby avoiding thermal cracking of the glass or bending deformation of the door.

[0026] The first frame 21 is an aluminum alloy frame, and the second frame 22 is an aluminum-plastic composite material or carbon fiber reinforced plastic.

[0027] Preferably, the flexible connection component includes an elastic support block 32, and the spring-loaded fastening structure 23 includes a buckle 231 and a slot 232 disposed between the rear end of the first frame 21 and the front end of the second frame 22. The elastic support block 32 is compressedly disposed between the buckle 231 and the slot 232. In this solution, the elastic support block 32 is compressedly disposed between the buckle 231 and the slot 232, so that the spring-loaded fastening structure 23 has an adaptive compression and rebound capability in the thickness direction of the glass door body 1: when thermally expanded, the elastic support block 32 is further compressed to absorb displacement, and when coldly contracted, it rebounds and resets, thereby eliminating thermal stress concentration in the thickness direction and maintaining connection stability.

[0028] The aforementioned elastic support block 32 is in the shape of a low-curvature arc.

[0029] Preferably, the concave-convex mating surface 311 is a trapezoidal groove surface that extends continuously along the side wall of the glass door body 1. In this design, the inclined side wall of the trapezoidal groove can provide a clear displacement guide for the glass side wall, preventing deflection or jamming during thermal expansion; its planar contact area is larger, which can make the elastic abutment force more uniformly distributed, avoiding local stress concentration and crushing failure; the trapezoidal structure has strong creep resistance and can maintain a stable geometric shape and buffer gap under long-term temperature difference cycling, while the crests of the wavy surface are easily flattened, leading to functional degradation; in addition, the trapezoidal groove surface is easy to achieve high-precision and high-consistency continuous molding through extrusion or molding, with uniform fit around the entire circle and continuous and reliable sealing path. Therefore, the trapezoidal groove surface is superior to the wavy surface in terms of directional guidance, stress uniformity, long-term fatigue life and processing consistency.

[0030] Of course, the aforementioned concave-convex mating surface 311 can also be designed as a wavy curved surface that extends continuously along the side wall of the glass door 1.

[0031] Preferably, a preset gap exists between the outer glass layer 11 and the intermediate interlayer 12, forming a hollow layer 14; a warm edge sealing strip 5 is also included, which is disposed along the edge of the hollow layer 14, connecting the outer glass layer 11 and the intermediate interlayer 12. Specifically, it is disposed between the outer glass layer 11 and the mesh transparent conductive film 4, and the outer periphery of the warm edge sealing strip 5 is connected to the first frame 21 through the flexible connector 31; the warm edge sealing strip 5 includes a three-layer composite structure of a stainless steel spacer 51, a butyl rubber layer 52, and a silicone rubber layer 53. In this solution, the warm edge sealing strip 5 is located at a critical position of cold bridge at the edge of the glass door 1. Through the three-layer composite structure of the stainless steel spacer 51 (low thermal conductivity), the butyl rubber layer 52 (airtight seal), and the silicone rubber layer 53 (elastic adhesion), the linear heat transfer coefficient at the edge is significantly reduced, blocking the direct heat conduction between the outer glass layer 11 and the mesh transparent conductive film, thereby reducing the temperature gradient between the glass edge and the central area. Meanwhile, the outer periphery of the warm edge sealing strip 5 is connected to the first frame 21 via a flexible connector 31, integrating the heat insulation function with the flexible buffer function: on the one hand, the elasticity of the flexible connector 31 absorbs thermal expansion displacement, and on the other hand, it prevents heat from the door frame 2 from being directly transferred to the glass edge. This structure, from the perspective of passive heat insulation, works in conjunction with active electric heating to further suppress the concentration of temperature difference stress.

[0032] The linear heat transfer coefficient of the aforementioned warm edge sealing strip 5 is ≤0.15 W / (m•K).

[0033] Preferably, the flexible connection assembly further includes an elastic buffer block 33. The second frame 22 is located on the rear side of the first frame 21 and the glass door 1, and there is a gap between the second frame 22 and the rear side of the glass door 1. The elastic buffer block 33 is sandwiched between the second frame 22 and the rear side of the glass door 1, and the elastic buffer block 33 has a preset compressible stroke along the thickness direction of the glass door 1.

[0034] Preferably, the system also includes a fiber Bragg grating sensor (not shown in the figure), which is disposed between the adhesive layer 12 and the door frame 2 and connected to the controller via an optical fiber. The controller has a preset stress threshold and is used to send a warning signal via a wireless communication module when the detected stress exceeds the threshold. In this solution, the fiber Bragg grating sensor is disposed between the adhesive layer 12 and the door frame 2, close to the stress source, resulting in fast response and high sensitivity. At the same time, its location is concealed, does not damage the appearance or seal, has strong anti-interference ability, and is stable in long-term operation.

[0035] Preferably, the thermal expansion displacement gap provided by the flexible connection component for the glass door 1 is ±2mm in both the length and width directions.

[0036] Preferably, the temperature sensor is an infrared sensor, used for non-contact detection of the temperature difference between the central area and the edge area of ​​the glass door 1.

[0037] Preferably, the controller has a preset start-up temperature difference value and a preset stop-down temperature difference value, wherein the start-up temperature difference value is 10℃ and the stop-down temperature difference value is 5℃. In this solution, edge heating is activated when the detected temperature difference reaches 10℃ to actively eliminate the temperature gradient; heating is stopped when the temperature difference drops to 5℃, avoiding overheating and frequent start-stop cycles, and achieving stable and energy-saving temperature difference control.

[0038] Preferably, the second frame 22 is connected to the cabinet 7 via a flexible magnetic door seal 6.

[0039] This invention achieves resistance to temperature difference stress through the synergistic effect of the glass door body 1, the door frame 2, the flexible connection component, and the zoned electric heating stress control component: The glass door body 1 adopts a composite sandwich structure with an outer glass layer 11, a middle interlayer 12, and an inner glass layer 13 stacked in sequence, utilizing the multi-layer interface to disperse thermal stress and improve the door body's resistance to thermal shock; The flexible connection component is set between the glass door body 1 and the door frame 2, providing the glass door body 1 with a thermal expansion displacement gap relative to the door frame 2 in the length and / or width directions, thereby releasing the expansion constraint stress caused by temperature difference and avoiding stress concentration at the edge mounting points; The zoned electric heating stress control component detects the temperature difference in different areas of the glass in real time through a temperature sensor, and the controller responds to the temperature difference by driving the mesh transparent conductive film 4 arranged at least in the edge area of ​​the glass door body 1 to selectively heat, actively reducing the in-plane temperature gradient. Compared with existing technologies, this invention systematically suppresses the thermal stress concentration of wine cabinet glass doors under large temperature difference conditions from three aspects: composite sandwich structure, flexible displacement compensation, and active temperature difference regulation. This effectively prevents glass thermal cracking, edge cracking, and door bending deformation, significantly improving the safety and service life of the product.

[0040] Example 2: This invention discloses a stress control method for a wine cabinet glass door structure based on the above-mentioned scheme. The method includes the following steps: acquiring the temperature difference between the central and edge regions of the glass door; comparing the temperature difference with a preset activation threshold; when the temperature difference is greater than or equal to the preset activation threshold, controlling a mesh-like transparent conductive film embedded inside the glass door to heat the edge region of the glass door, and continuously acquiring the temperature difference during the heating process; stopping heating when the temperature difference is less than or equal to a preset shutdown threshold; and real-time detecting the stress value of the sealing area using a fiber optic grating sensor located at the edge of the glass door; when the stress value exceeds a preset stress threshold, pushing a warning signal outward via a wireless communication module.

[0041] Based on the content and principles disclosed in the above specification, those skilled in the art can make various changes, modifications, or substitutions to the specific embodiments described above without departing from the essence and scope of the invention. Therefore, the invention is not limited to the specific embodiments and drawings disclosed herein. Any changes, equivalent substitutions, or improvements made within the scope of protection defined in the claims should be included within the scope of protection of the invention. Furthermore, although specific technical terms or expressions may be used in the specification, this is only for the purpose of facilitating description and understanding of the invention and is not intended to limit the scope of the invention. Similar or identical parts between the various embodiments in this specification can be referred to mutually; differences are emphasized in terms of improvements and beneficial effects.

Claims

1. A glass door structure for a wine cabinet resistant to temperature difference stress, characterized in that, include: A glass door, wherein the glass door is composed of an outer layer of glass, a middle laminated layer and an inner layer of glass stacked in sequence; The passive control structure includes a door frame surrounding the edge of the glass door and a flexible connection component disposed between the glass door and the door frame; The door frame has an elastic displacement in the thickness direction of the glass door body, and the flexible connection assembly provides the glass door body with a thermal expansion displacement gap relative to the door frame in the length and / or width directions. The active control structure includes a mesh transparent conductive film embedded inside the glass door body, a temperature sensor for detecting the temperature of different areas of the glass, and a controller; the mesh transparent conductive film is arranged at least in the edge area of ​​the glass door body, the controller is electrically connected to the temperature sensor and the mesh transparent conductive film, and the three form a zoned stress control component, which drives the mesh transparent conductive film to selectively heat the edge area in response to the temperature difference detected by the temperature sensor.

2. The glass door structure of the wine cabinet according to claim 1, characterized in that, The outer glass is Low. E. Tempered glass, wherein the inner glass layer is homogeneous tempered glass and the intermediate interlayer is an SGP interlayer; or, the intermediate interlayer is a PVB interlayer.

3. The glass door structure of the wine cabinet according to claim 2, characterized in that, The door frame includes a first frame connected to the glass door and a second frame for connecting to the wine cabinet. The rear end of the first frame and the front end of the second frame are connected by a spring-loaded fastening structure, which has an elastic displacement in the thickness direction of the glass door. The flexible connection assembly includes a flexible connector disposed between the first frame and the glass door. The flexible connector is arranged around the four edges of the glass door and has concave and convex mating surfaces that elastically abut against the side wall of the glass door.

4. The glass door structure of the wine cabinet according to claim 3, characterized in that, The flexible connection component includes an elastic support block, and the spring-loaded fastening structure includes a buckle and a slot disposed between the rear end of the first frame and the front end of the second frame, wherein the elastic support block is compressed and disposed between the buckle and the slot.

5. The glass door structure of the wine cabinet according to claim 3, characterized in that, The concave-convex mating surface is a trapezoidal groove surface that extends continuously along the side wall of the glass door; or, the concave-convex mating surface is a wavy curved surface that extends continuously along the side wall of the glass door.

6. The glass door structure of the wine cabinet according to claim 1, characterized in that, The controller has a preset start-up temperature difference value and a preset stop-down temperature difference value.

7. The glass door structure of the wine cabinet according to claim 3, characterized in that, The flexible connection assembly further includes an elastic buffer block. The second frame is located on the rear side of the first frame and the glass door, and there is a gap between the second frame and the rear side of the glass door. The elastic buffer block is sandwiched between the second frame and the rear side of the glass door, and the elastic buffer block has a preset compressible stroke along the thickness direction of the glass door.

8. The glass door structure of the wine cabinet according to claim 1, characterized in that, The outer glass layer and the intermediate interlayer have a preset gap to form a hollow layer; it also includes a warm edge sealing strip, which is disposed along the edge of the hollow layer; the warm edge sealing strip includes a three-layer composite structure of a stainless steel spacer, a butyl rubber layer and a silicone rubber layer.

9. The glass door structure of the wine cabinet according to claim 1, characterized in that, It also includes a fiber Bragg grating sensor, which is disposed between the adhesive layer and the door frame and connected to the controller via an optical fiber; the controller has a preset stress threshold.

10. A stress control method, based on the glass door structure of a wine cabinet according to any one of claims 1-9, characterized in that, Includes the following steps: The temperature difference between the center area and the edge area of ​​the glass door is obtained, and the temperature difference is compared with a preset start threshold. When the temperature difference is greater than or equal to the preset start threshold, the mesh transparent conductive film embedded in the glass door is controlled to heat the edge area of ​​the glass door. The temperature difference is continuously obtained during the heating process. When the temperature difference is less than or equal to the preset stop threshold, the heating is stopped. The stress value of the sealing area is detected in real time by a fiber optic grating sensor installed on the edge of the glass door. When the stress value exceeds a preset stress threshold, a warning signal is pushed outward through a wireless communication module.

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