A rainproof structure for a special refrigeration box

Abstract

This utility model discloses a rainproof structure for a specially designed refrigerated container. The rainproof structure is installed on the threshold outside the bottom plate of the container. The structure includes a pad on the threshold and a rainproof plate covering the pad. The rainproof plate and the top surface of the threshold form a slope, making the inner height of the container higher than the outer height. The rainproof plate works in conjunction with the sealing strip of the container door to form a sealed structure, preventing rainwater from entering the container. The advantages of this utility model are: the composite slope design and sealing strip of this technical solution achieve zero leakage in heavy rain conditions, solving the problem of rainwater backflow in traditional side-opening refrigerated containers.

Description

Technical Field

[0001] This utility model relates to the field of container technology, and in particular to a rainproof structure for a specially designed refrigerated container. Background Technology

[0002] In existing technologies, the international or long-distance transportation of precision instruments (such as medical equipment, optical instruments, semiconductor wafers, etc.) typically relies on specially designed refrigerated boxes, which must maintain a strict temperature and humidity environment (e.g., temperature fluctuation range ±1℃, relative humidity ≤60%). Because these instruments are large (some exceeding 6 meters in length and weighing over 10 tons), traditional rear-door structures cannot meet loading and unloading requirements. Therefore, the industry generally adopts a single-sided, fully opening door design, where the door opens completely along the length of the refrigerated box, and the opening size must be larger than the maximum cross-sectional size of the instrument to avoid collision damage during handling.

[0003] However, the large opening of the side-opening door structure makes the rainproof performance of the threshold a technical bottleneck. Existing refrigerated containers often use channel steel for their inner thresholds. When installing the PVC (polyvinyl chloride) threshold strips, welding errors or load-bearing deformation can easily cause tilting, creating a reverse slope where the inside of the container is lower than the outside. In heavy rain or prolonged exposure to water (such as during open-air loading and unloading or on a sea deck), rainwater can easily flow back into the container along the tilted threshold surface, causing a sudden increase in humidity and leading to malfunctions such as corrosion of internal components and short circuits in circuit boards. According to industry statistics, damage to precision instruments during transportation caused by rainwater backflow accounts for 23% of all malfunctions, resulting in direct economic losses exceeding ten million yuan annually.

[0004] Meanwhile, traditional refrigerated boxes use threshold bolts to rigidly connect the bottom plate to the frame. These bolts penetrate the insulation layer, creating thermal bridges and increasing the heat exchange rate between the inside and outside of the box by 30%-40%. To maintain the low temperature inside, the refrigeration system needs to operate under continuous high load, increasing energy consumption by approximately 15%. Furthermore, the bolt connections are prone to stress fatigue due to temperature changes, reducing the structural lifespan. In addition, the bolt heads protrude from the threshold surface, potentially scratching the equipment surface during loading and unloading, posing a safety hazard.

[0005] To address the aforementioned problems, existing technologies have attempted improvements by adding rubber sealing strips or installing water-blocking plates. However, rubber strips are prone to aging and failure, and the connection between the water-blocking plate and the door sill still relies on bolt fixation, failing to fundamentally solve the problems of reverse slope and thermal bridging. Therefore, developing a special rainproof structure for refrigerated boxes that can both create an effective rainproof slope and eliminate the thermal bridging effect has become an urgent technical need to be addressed in this field. Utility Model Content

[0006] The main technical problem solved by this utility model is to provide a rainproof structure for a special refrigerated box, thereby solving one or more of the above-mentioned prior art problems.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a rainproof structure for a special refrigerated box, wherein the rainproof structure is installed on the threshold on the outer side of the bottom plate of the special refrigerated box, and its innovation lies in that: the rainproof structure includes A pad placed on the outer threshold of the bottom plate of the refrigerator box; And a rainproof plate covering the pad; The rainproof panel and the top surface of the threshold form an inclined slope, making the inner height of the refrigerator higher than the outer height; the rainproof panel and the sealing strip of the refrigerator door cooperate to form a sealing structure to prevent rainwater from entering the refrigerator.

[0008] In some embodiments, the rainproof plate is composed of inclined surface a and inclined surface b connected together. The pad is supported below the corner of inclined surface a and inclined surface b, and the inclined surface a is closer to the door side with an angle of 10-15° with the top surface of the threshold, and the inclined surface b has an angle of 20-30° with the top surface of the threshold.

[0009] In some embodiments, the rainproof plate is made of stainless steel patterned plate, and the pad is made of metal. The two are fixed to the threshold by intermittent welding, and the unwelded parts are filled with sealant to prevent moisture from entering and causing corrosion.

[0010] In some implementations, the rainproof structure eliminates the sill bolt connection, replacing bolt fixation with an integrated structure of the pad, base plate, and base frame to reduce the thermal bridging effect.

[0011] In some implementations, a supporting angle steel is provided below the pad, and the thickness of the supporting angle steel is less than that of the angle steel in a conventional bolted connection structure.

[0012] In some implementations, the surface of the rainproof panel is provided with anti-slip texture, and its two ends are respectively sealed to the outer threshold and floor of the refrigerator.

[0013] The beneficial effects of this utility model are: Highly effective waterproof: The composite slope design, combined with the sealing strip, can achieve zero leakage in heavy rain (rainfall ≥50mm / h) environments, solving the problem of rainwater backflow in traditional side-opening refrigerators; Low-energy insulation: Eliminating bolted connections reduces thermal bridges, lowering the temperature fluctuation range inside the chamber to ±0.5℃. Combined with a thinner supporting angle steel design, the overall cost is reduced by 8%-10%. Enhanced durability: The corrosion resistance of the stainless steel rainproof plate (salt spray test ≥500 hours) and the weather resistance of the sealant (no cracking in environments ranging from -40℃ to 80℃) extend the structural lifespan to more than 8 years. Easy installation: Intermittent welding and gluing processes replace bolt fastening, reducing assembly time per box by 30 minutes, making it suitable for mass production. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein: Figure 1 This is a schematic diagram of the rainproof structure of a special refrigerated box of this utility model assembled in a container.

[0015] Figure 2 This is a schematic diagram of the rainproof panel of a special refrigeration box according to this utility model. Detailed Implementation

[0016] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] like Figure 1 and Figure 2 As shown, this utility model embodiment includes: a special refrigerated box rainproof structure mainly includes two core components: a pad 100 and a rainproof plate 200; the pad 100 is made of metal (such as aluminum alloy or carbon steel) and is fixed to the threshold 001 on the outside of the bottom plate of the refrigerated box by welding, its extension direction is consistent with the threshold 001, its thickness is 3-5mm, and its width is slightly larger than the width of the threshold 001 to ensure stable support; the rainproof plate 200 covers the pad 100 and is integrally formed of a 2-3mm thick stainless steel patterned plate with a diamond-shaped anti-slip pattern pressed on the surface. Both ends are fixed to the outer threshold 001 and the floor of the refrigerated box by intermittent welding (weld point spacing 50-80mm), and the unwelded parts are filled with weather-resistant sealant (such as silicone sealant) to form a closed waterproof structure.

[0018] The rainproof panel 200 is composed of a smoothly connected inclined surface a201 and an inclined surface b202. The corner where the two meet is supported by a pad 100, forming a stepped slope with the inner side higher and the outer side lower. The inclined surface a201, closer to the door of the refrigerator, forms an angle α of 10-15° (preferably 12°) with the top surface of the threshold 001, while the inclined surface b202, further away from the door, forms an angle β of 20-30° (preferably 25°) with the top surface of the threshold 001. This angle design allows rainwater to flow quickly out of the refrigerator along the inclined surface b202 under the action of gravity. At the same time, the inclined surface a201 is tightly fitted with the sealing strip (002) (EPDM material) at the bottom of the door, forming the first sealing barrier.

[0019] This structure eliminates the traditional threshold bolt, replacing it with a welded integral structure of the pad 100 to the base plate and frame. Specifically, a supporting angle steel (Q235 material) is installed below the pad 100, with its thickness reduced from the traditional 8mm to 5mm, and connected to the frame via intermittent welding. This design not only simplifies the assembly process but also avoids the thermal bridge formed by bolts penetrating the base plate (metal bolts cause heat exchange between the inside and outside of the box), improving the insulation performance of the refrigerator by 15%-20%.

[0020] The working principle of this technical solution is: when the refrigerated box is in an outdoor environment or encounters rain during transportation, the rainproof structure achieves a waterproof effect through a triple mechanism. Slope drainage: The combined slope formed by inclined surfaces a201 and b (total height difference 8-12mm) allows rainwater to be quickly discharged out of the box along inclined surface b202, avoiding water accumulation at the threshold 001; Sealing fit: When the door is closed, the sealing strip 002 is in close contact with the inclined surface a201, with a compression of 2-3mm, blocking the path of rainwater infiltration; Structural protection: The high strength of the stainless steel patterned plate (tensile strength ≥500MPa) can resist the impact during handling, the anti-slip texture prevents operators from slipping, and the sealant-filled weld gaps prevent moisture from entering the internal metal structure and corroding it.

[0021] The advantages of this technical solution are: Highly effective waterproofing: The composite slope design, combined with the 002 sealing strip, can achieve zero leakage even in heavy rain (rainfall ≥ 50mm / h), solving the problem of rainwater backflow in traditional side-opening refrigerators; Low-energy insulation: Eliminating bolted connections reduces thermal bridges, lowering the temperature fluctuation range inside the chamber to ±0.5℃. Combined with a thinner supporting angle steel design, the overall cost is reduced by 8%-10%. Enhanced durability: The corrosion resistance of the stainless steel rainproof plate 200 (salt spray test ≥500 hours) and the weather resistance of the sealant (no cracking in environments of -40℃~80℃) extend the structural life to more than 8 years. Easy installation: Intermittent welding and gluing processes replace bolt fastening, reducing assembly time per box by 30 minutes, making it suitable for mass production.

[0022] The workflow of this technical solution is as follows: During the final assembly of the refrigerated box, the pad 100 is first welded to the junction of the threshold 001 and the floor. Then, the rainproof plate 200 is placed and intermittently welded at both ends. Finally, sealant is filled into the weld gaps. When the box door is closed, the inclined surface a201 and the sealing strip 002 form a seal, allowing rainwater to drain along the inclined surface b202. Simultaneously, the boltless structure reduces heat transfer, and the thinner supporting angle steel lowers material costs. This structure is particularly suitable for specialized refrigerated boxes used for transporting precision instruments, meeting temperature and humidity control requirements from -20℃ to 40℃, ensuring the safety of instruments in extreme environments.

[0023] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A rainproof structure for a special refrigerated box, said rainproof structure being disposed on the threshold (001) on the outer side of the bottom plate of the special refrigerated box, characterized in that: The rainproof structure includes A pad (100) is installed on the outer threshold (001) of the bottom plate of the refrigerator box. And a rainproof plate (200) covering the pad (100); The rainproof plate (200) and the top surface of the threshold (001) form an inclined slope, so that the height of the inside of the refrigerator is higher than the height of the outside; the rainproof plate (200) and the sealing strip (002) of the refrigerator door cooperate to form a sealing structure to prevent rainwater from entering the refrigerator.

2. The rainproof structure of a special refrigerated box according to claim 1, characterized in that: The rainproof plate (200) is composed of inclined surface a (201) and inclined surface b (202) connected together. The pad (100) is supported below the corner of inclined surface a (201) and inclined surface b (202). The inclined surface a (201) is close to the door and the angle between it and the top surface of the threshold (001) is 10-15°. The angle between the inclined surface b (202) and the top surface of the threshold (001) is 20-30°.

3. The rainproof structure of a special refrigerated box according to claim 1, characterized in that: The rainproof plate (200) is made of stainless steel patterned plate, and the pad plate (100) is made of metal. The two are fixed to the threshold (001) by intermittent welding, and the unwelded parts are filled with sealant to prevent moisture from entering and causing corrosion.

4. The rainproof structure of a special refrigerated box according to claim 1, characterized in that: The rainproof structure eliminates the bolt connection of the threshold (001), and replaces the bolt fixing by the integral structure of the pad (100) with the base plate and the base frame, so as to reduce the thermal bridge effect.

5. The rainproof structure of a special refrigerated box according to claim 4, characterized in that: A supporting angle steel is provided below the pad (100), and the thickness of the supporting angle steel is less than that of the angle steel in the traditional bolt connection structure.

6. The rainproof structure of a special refrigerated box according to claim 1, characterized in that: The surface of the rainproof plate (200) is provided with anti-slip texture, and its two ends are respectively sealed to the outer threshold (001) of the refrigerator and the floor.

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